Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
This white paper demonstrates how the parallel prototyping of two materials, Aluminum Nitride (AlN) and Alumina (Al2O3), in a heating component design for low- to medium-volume production contributed to this success. It also addresses the verification, validation, form and fit testing relative to the FDA (Food and Drug Administration) approval process.
This document summarizes a study that investigated using a vortex tube for cooling during machining of mild steel. The study used Taguchi's design of experiments to optimize cutting parameters (speed, feed rate, depth of cut) to minimize tool wear. Experiments were conducted using an L9 orthogonal array with 3 factors at 3 levels. Analysis of variance identified depth of cut as the most influential parameter on tool wear. Optimization found the best parameters for minimizing wear were: speed of 190 rpm, feed of 0.36 mm/rev, and depth of 2 mm. Vortex tube cooling was found to be an effective, environmentally friendly alternative to liquid coolants for reducing tool wear during machining.
Design of experiments using Moldflow Analysis.Nilesh Nevrekar
The document discusses using Design of Experiments (DOE) in Moldflow to analyze injection molding processes. It describes different types of DOE analyses including Taguchi screening analysis, factorial analysis, and Taguchi followed by factorial analysis. Input parameters for DOE in Moldflow include mold temperature, melt temperature, injection time, and others. Reasons to perform DOE include optimizing part thickness and cycle time. The document provides steps to conduct each type of analysis and interpret their results.
Feasibility studies are an extremely valuable tool when looking to acquire an industrial drying system. They can help to confirm process viability, and gather data points necessary for process scale-up. This presentation looks at some of the settings in which drying feasibility trials are most valuable, as well as the benefits feasibility testing can offer, and what types of things can be tested for.
Defects Analysis and Optimization of Process Parameters using Taguchi Doe Tec...IRJET Journal
This document describes an analysis of the cold shut defect in sand castings using Taguchi design of experiments techniques for parameter optimization. Data was collected from a foundry producing gray iron castings showing the splash delivery casing component had the highest rejection rate due to cold shut defects. Pareto analysis identified cold shut as the primary cause of rejection. Process parameters of pouring temperature, pouring time, and gating system were selected for optimization. Taguchi L4 orthogonal array experiments were conducted varying these parameters. Signal to noise ratio analysis identified the optimal parameter levels for minimizing cold shut defects. Implementing the optimized parameters reduced casting rejection rates.
IRJET- LPG Tank Burst Pressure Determination using FEMIRJET Journal
1) The document describes a finite element analysis conducted to determine the burst pressure of a 12.5 kg liquefied petroleum gas (LPG) storage cylinder made of carbon steel.
2) Experimental burst test results for a similar cylinder from a previous study were used for comparison.
3) The finite element analysis predicted a burst pressure of 115 bars, which was close to the experimental range of 115-125 bars with an error of 5%.
Case Study On Metal To Plastic Substitution OpmNilesh Nevrekar
This case study describes the process of redesigning a metal component for a water treatment system out of plastic. The objectives were to reduce costs through plastic injection molding while meeting structural and pressure requirements. Engineers redesigned the component, selected reinforced PA-12 plastic, optimized the design for manufacturability through moldflow analysis. They addressed challenges like porosity and sink marks through experimentation and process control. This improved quality and reduced costs compared to the metal component.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
This white paper demonstrates how the parallel prototyping of two materials, Aluminum Nitride (AlN) and Alumina (Al2O3), in a heating component design for low- to medium-volume production contributed to this success. It also addresses the verification, validation, form and fit testing relative to the FDA (Food and Drug Administration) approval process.
This document summarizes a study that investigated using a vortex tube for cooling during machining of mild steel. The study used Taguchi's design of experiments to optimize cutting parameters (speed, feed rate, depth of cut) to minimize tool wear. Experiments were conducted using an L9 orthogonal array with 3 factors at 3 levels. Analysis of variance identified depth of cut as the most influential parameter on tool wear. Optimization found the best parameters for minimizing wear were: speed of 190 rpm, feed of 0.36 mm/rev, and depth of 2 mm. Vortex tube cooling was found to be an effective, environmentally friendly alternative to liquid coolants for reducing tool wear during machining.
Design of experiments using Moldflow Analysis.Nilesh Nevrekar
The document discusses using Design of Experiments (DOE) in Moldflow to analyze injection molding processes. It describes different types of DOE analyses including Taguchi screening analysis, factorial analysis, and Taguchi followed by factorial analysis. Input parameters for DOE in Moldflow include mold temperature, melt temperature, injection time, and others. Reasons to perform DOE include optimizing part thickness and cycle time. The document provides steps to conduct each type of analysis and interpret their results.
Feasibility studies are an extremely valuable tool when looking to acquire an industrial drying system. They can help to confirm process viability, and gather data points necessary for process scale-up. This presentation looks at some of the settings in which drying feasibility trials are most valuable, as well as the benefits feasibility testing can offer, and what types of things can be tested for.
Defects Analysis and Optimization of Process Parameters using Taguchi Doe Tec...IRJET Journal
This document describes an analysis of the cold shut defect in sand castings using Taguchi design of experiments techniques for parameter optimization. Data was collected from a foundry producing gray iron castings showing the splash delivery casing component had the highest rejection rate due to cold shut defects. Pareto analysis identified cold shut as the primary cause of rejection. Process parameters of pouring temperature, pouring time, and gating system were selected for optimization. Taguchi L4 orthogonal array experiments were conducted varying these parameters. Signal to noise ratio analysis identified the optimal parameter levels for minimizing cold shut defects. Implementing the optimized parameters reduced casting rejection rates.
IRJET- LPG Tank Burst Pressure Determination using FEMIRJET Journal
1) The document describes a finite element analysis conducted to determine the burst pressure of a 12.5 kg liquefied petroleum gas (LPG) storage cylinder made of carbon steel.
2) Experimental burst test results for a similar cylinder from a previous study were used for comparison.
3) The finite element analysis predicted a burst pressure of 115 bars, which was close to the experimental range of 115-125 bars with an error of 5%.
Case Study On Metal To Plastic Substitution OpmNilesh Nevrekar
This case study describes the process of redesigning a metal component for a water treatment system out of plastic. The objectives were to reduce costs through plastic injection molding while meeting structural and pressure requirements. Engineers redesigned the component, selected reinforced PA-12 plastic, optimized the design for manufacturability through moldflow analysis. They addressed challenges like porosity and sink marks through experimentation and process control. This improved quality and reduced costs compared to the metal component.
This document summarizes a study that optimized cutting parameters and the grinding process for surface roughness using the Taguchi method and computational fluid dynamics (CFD) analysis. The study aimed to achieve a good surface finish by optimizing parameters like cutting fluid, wheel speed, workpiece speed, depth of cut, grinding wheel grades, and material hardness. CFD analysis was used to simulate the grinding process and analyze temperature, pressure, velocity, and coolant flow distributions. The Taguchi method was employed to investigate the effects of parameters on surface roughness and find the optimum parameters. The results showed that coolant flow rate and table speed had significant effects on surface roughness, while depth of cut had a lower effect.
1) The document presents a CFD analysis comparing the heat transfer performance of rectangular fins versus louvered fins in an aluminum radiator.
2) The results show that the louvered fin design achieved a 49% higher heat transfer rate and significantly higher fluid velocities compared to the rectangular fin design.
3) Key factors in the improved performance of the louvered fins are the fin geometry and increased turbulence that enhances heat transfer between the coolant and fins.
Recovery of Liquid Hydrocarbons by Catalytic Depolymerization of Waste Plasti...IRJET Journal
The document summarizes research on recovering liquid hydrocarbons from waste plastic through catalytic depolymerization and blending with automotive fuel. Key findings include:
1) Waste plastic was catalytically cracked using a copper-based catalyst, yielding over 65% fuel with a boiling range that allows blending into gasoline and diesel.
2) Characterization found the recovered liquid has properties similar to gasoline and diesel, including density, viscosity, heating value.
3) Blends of up to 80% recovered liquid with gasoline had only a slight reduction in heating value, showing its potential as a gasoline blend. Blends with diesel showed potential to reduce emissions while maintaining performance.
4) Recovering fuel from waste
This document summarizes an investigation into flank wear on minimal cutting fluid application during turning of OHNS steel. Seven input parameters were varied at three levels in a 27-run Taguchi experiment. Analysis found that feed rate had the greatest influence on flank wear, cutting temperature, and chip thickness based on ANOVA. Optimal cutting and fluid application parameters were determined to be a cutting speed of 168.23 m/min, feed of 0.04 mm/rev, depth of cut of 1 mm, pressure of 100 bar, frequency of 900 pulses/min, application rate of 3 ml/min, and fluid composition of 20%. The study provides optimized parameters for improved tool performance during turning of OHNS steel with minimal cutting fluid application.
This ppt is about the cold mix asphalt. Some of its advantages and disadvantages over hot mix asphalt. Also some discussion about the test conducted on the cold mix asphalt and the result of it. And also discuss about the conclusion of above.
The document discusses the role of laboratories in the petroleum industry. It outlines how laboratories ensure quality control through routine testing of raw materials, process streams, and finished products. This includes testing properties like density, salt content, water content, viscosity, sulfur content, and metals content. Laboratories also perform troubleshooting, process optimization, and product certification activities. Their work is important for monitoring performance, ensuring product specifications are met, and solving quality problems.
1. The document investigates factors that affect blow holes in the die casting process of aluminum alloy R14 for automotive compressor parts.
2. An experiment was conducted using Box-Behnken design to study the relationship between casting parameters (pressure, injection speeds, starting position, vacuum pressure) and blow holes.
3. The results found that all parameters significantly affected blow holes, with interactions between casting pressure and injection speed, casting pressure and vacuum pressure, injection speed and starting position, and starting position and injection speed also having effects. The optimum conditions to minimize blow holes were determined.
The document describes an experiment to optimize cutting parameters during CNC turning of AISI 8620 alloy steel using response surface methodology. Speed, feed rate, and depth of cut were varied as factors in a 3-level factorial design. The response variable was surface roughness, which was measured after each experimental run. Regression analysis in Minitab was used to develop a model relating the factors to surface roughness. Response optimization was then used to determine the optimal settings of the factors to minimize surface roughness. The goal of the experiment was to evaluate the best cutting parameter settings for achieving a smooth surface finish during CNC turning of AISI 8620 alloy steel.
IRJET- Optimization of Process Parameter in Injection Moulding using Tagu...IRJET Journal
This document summarizes a study that used Taguchi methods and ANOVA to optimize injection molding process parameters for a polypropylene chair bottom part. The researchers used Moldflow Adviser software to simulate different combinations of mold temperature, melt temperature, injection pressure, and cooling time based on an L9 orthogonal array. The goal was to minimize fill time and volumetric shrinkage. ANOVA results identified melt temperature as the most significant factor influencing both responses. The best optimized parameters found were a low melt temperature, low mold temperature, low injection pressure, and long cooling time.
IRJET- Optimum Design Parameters for Effective Moldability of Gas SensorIRJET Journal
This document discusses optimizing design parameters for effective molding of a gas sensor through mold flow simulation. It analyzes two trials of injection molding simulations to determine the optimal gate location, moldability, defects, and processing parameters. Trial 2 with parameters of 2 second fill time, 50°C mold temperature, 245°C melt temperature, and 55MPa injection pressure produced fewer sink marks, air traps, and weld lines than Trial 1. Trial 2 also had a faster cooling time of 8 seconds, making it the ideal design for molding the gas sensor part.
OPTIMIZATION OF METAL REMOVAL RATE FOR SS316L IN DRY TURNING OPERATION USING ...ijiert bestjournal
This research work deals with an optimization of tu rning process by the effect of machining parameters applying ANOVA &Taguchi methods to improve the qual ity of manufactured goods and engineering development of designs for studying variation. More over,iron in steel has greater affinity towards ca rbon of WC of the tool. P grade is more diffusion resistant grade due to presence of more stable carbides like TiC,TaC and NbC. Therefore,P grade is also known as mi xed carbide grade and more suitable for machining steel. Since P 30 grade of cemented carbide would p rovide excellent balance of hardness,wear resistan ce and toughness,the same grade has been chosen for m achining of stainless steel. Turning is a metal cut ting process by which metals from the outer periphery of a cylindrical work piece is removed and the volume of metal removed per unit time is known as metal remov al rate or MRR. Basically MRR is an important criterion in production engineering to increase the productivity and quality. MRR varies with the vari ation of cutting parameters of different metals. In this pro ject work,Austenitic stainless steel AISI 316L is considered as work piece while spindle speed,feed rate and depth of cut are considered as cutting parameters. During turning process it is expected t hat the highest material removal rate is accomplish ed in order to achieve highest production at reduced time and cost and therefore it becomes very important i ssue to precisely study the effect of turning parameters . The results of analysis show that depth of cut an d spindle speed have the most significant contribution on the material removal rate and feed rate has less signi ficant contribution on the material removal rate.
This document summarizes an experimental study that optimized machining parameters for cryogenic turning of AISI 4340 steel to minimize surface roughness. The researchers used Taguchi's design of experiments methodology to test cutting speed, feed rate, depth of cut, and rake angle parameters. Analysis showed cutting speed and depth of cut most influenced surface roughness. Validation experiments confirmed the optimal parameters achieved the predicted minimum surface roughness, demonstrating cryogenic machining's ability to improve surface finish.
Melt Flow Index Tester, Melt Flow Index Tester Manufacturers and Suppliers In...Presto Group
Looking for Melt Flow Index Tester manufacturers, Melt Flow Index Tester suppliers, Melt Flow Index Tester producers, Melt Flow Index Tester exporters, Melt Flow Index Tester wholesalers, Melt Flow Index Tester production centers ? Browse PrestoGroup.com for all your testing instruments needs. For more information visit- http://www.prestogroup.com/plastic-testing-instruments/melt-flow-index-deluxe
This document summarizes a study that used Taguchi experimental design to optimize the chemical machining parameters for cold worked stainless steel 420. The study examined the effects of machining temperature, machining time, and degree of previous cold working on the surface finish. Samples with 0%, 20%, 40%, and 60% cold working were chemically machined at temperatures of 45°C, 50°C, 55°C, and 58°C for times of 2, 4, 6, and 8 minutes. Analysis of variance and regression modeling found that the degree of previous cold working was the most significant parameter affecting surface finish. The optimal conditions were determined to be 60% cold working at 45°C for 2 minutes.
Investigation of the mechanical, corrosion properties and wear behaviour of e...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
This document summarizes a study of various physical properties of lithium-borosilicate glass samples. Glass samples were prepared with compositions of 42.5Li2O-(57.5-x)B2O3-xSiO2, where x ranged from 0-57.5 mol%. Density, molar volume, oxygen packing density, ionic concentration, and inter-ionic distance were measured for the samples. The results showed that molar volume, inter-ionic distance, and polaron radius decreased with increasing SiO2 content, indicating a more loosely packed glass structure. Oxygen packing density and ionic concentration also decreased with higher SiO2. The glass transition temperature was found to decrease with increasing
International Journal of Engineering Research and DevelopmentIJERD Editor
This document discusses power quality enhancement using Flexible AC Transmission System (FACTS) devices. It provides an overview of various FACTS devices including Static Var Compensator (SVC), Static Synchronous Compensator (STATCOM), and Static Synchronous Series Compensator (SSSC). MATLAB simulations of systems using SVC, STATCOM and SSSC are presented to demonstrate how each FACTS device can improve power quality by mitigating issues like voltage fluctuations and power oscillations. The document concludes that FACTS devices provide better power quality under varying source voltages and sudden loading conditions.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
This document summarizes a study that optimized cutting parameters and the grinding process for surface roughness using the Taguchi method and computational fluid dynamics (CFD) analysis. The study aimed to achieve a good surface finish by optimizing parameters like cutting fluid, wheel speed, workpiece speed, depth of cut, grinding wheel grades, and material hardness. CFD analysis was used to simulate the grinding process and analyze temperature, pressure, velocity, and coolant flow distributions. The Taguchi method was employed to investigate the effects of parameters on surface roughness and find the optimum parameters. The results showed that coolant flow rate and table speed had significant effects on surface roughness, while depth of cut had a lower effect.
1) The document presents a CFD analysis comparing the heat transfer performance of rectangular fins versus louvered fins in an aluminum radiator.
2) The results show that the louvered fin design achieved a 49% higher heat transfer rate and significantly higher fluid velocities compared to the rectangular fin design.
3) Key factors in the improved performance of the louvered fins are the fin geometry and increased turbulence that enhances heat transfer between the coolant and fins.
Recovery of Liquid Hydrocarbons by Catalytic Depolymerization of Waste Plasti...IRJET Journal
The document summarizes research on recovering liquid hydrocarbons from waste plastic through catalytic depolymerization and blending with automotive fuel. Key findings include:
1) Waste plastic was catalytically cracked using a copper-based catalyst, yielding over 65% fuel with a boiling range that allows blending into gasoline and diesel.
2) Characterization found the recovered liquid has properties similar to gasoline and diesel, including density, viscosity, heating value.
3) Blends of up to 80% recovered liquid with gasoline had only a slight reduction in heating value, showing its potential as a gasoline blend. Blends with diesel showed potential to reduce emissions while maintaining performance.
4) Recovering fuel from waste
This document summarizes an investigation into flank wear on minimal cutting fluid application during turning of OHNS steel. Seven input parameters were varied at three levels in a 27-run Taguchi experiment. Analysis found that feed rate had the greatest influence on flank wear, cutting temperature, and chip thickness based on ANOVA. Optimal cutting and fluid application parameters were determined to be a cutting speed of 168.23 m/min, feed of 0.04 mm/rev, depth of cut of 1 mm, pressure of 100 bar, frequency of 900 pulses/min, application rate of 3 ml/min, and fluid composition of 20%. The study provides optimized parameters for improved tool performance during turning of OHNS steel with minimal cutting fluid application.
This ppt is about the cold mix asphalt. Some of its advantages and disadvantages over hot mix asphalt. Also some discussion about the test conducted on the cold mix asphalt and the result of it. And also discuss about the conclusion of above.
The document discusses the role of laboratories in the petroleum industry. It outlines how laboratories ensure quality control through routine testing of raw materials, process streams, and finished products. This includes testing properties like density, salt content, water content, viscosity, sulfur content, and metals content. Laboratories also perform troubleshooting, process optimization, and product certification activities. Their work is important for monitoring performance, ensuring product specifications are met, and solving quality problems.
1. The document investigates factors that affect blow holes in the die casting process of aluminum alloy R14 for automotive compressor parts.
2. An experiment was conducted using Box-Behnken design to study the relationship between casting parameters (pressure, injection speeds, starting position, vacuum pressure) and blow holes.
3. The results found that all parameters significantly affected blow holes, with interactions between casting pressure and injection speed, casting pressure and vacuum pressure, injection speed and starting position, and starting position and injection speed also having effects. The optimum conditions to minimize blow holes were determined.
The document describes an experiment to optimize cutting parameters during CNC turning of AISI 8620 alloy steel using response surface methodology. Speed, feed rate, and depth of cut were varied as factors in a 3-level factorial design. The response variable was surface roughness, which was measured after each experimental run. Regression analysis in Minitab was used to develop a model relating the factors to surface roughness. Response optimization was then used to determine the optimal settings of the factors to minimize surface roughness. The goal of the experiment was to evaluate the best cutting parameter settings for achieving a smooth surface finish during CNC turning of AISI 8620 alloy steel.
IRJET- Optimization of Process Parameter in Injection Moulding using Tagu...IRJET Journal
This document summarizes a study that used Taguchi methods and ANOVA to optimize injection molding process parameters for a polypropylene chair bottom part. The researchers used Moldflow Adviser software to simulate different combinations of mold temperature, melt temperature, injection pressure, and cooling time based on an L9 orthogonal array. The goal was to minimize fill time and volumetric shrinkage. ANOVA results identified melt temperature as the most significant factor influencing both responses. The best optimized parameters found were a low melt temperature, low mold temperature, low injection pressure, and long cooling time.
IRJET- Optimum Design Parameters for Effective Moldability of Gas SensorIRJET Journal
This document discusses optimizing design parameters for effective molding of a gas sensor through mold flow simulation. It analyzes two trials of injection molding simulations to determine the optimal gate location, moldability, defects, and processing parameters. Trial 2 with parameters of 2 second fill time, 50°C mold temperature, 245°C melt temperature, and 55MPa injection pressure produced fewer sink marks, air traps, and weld lines than Trial 1. Trial 2 also had a faster cooling time of 8 seconds, making it the ideal design for molding the gas sensor part.
OPTIMIZATION OF METAL REMOVAL RATE FOR SS316L IN DRY TURNING OPERATION USING ...ijiert bestjournal
This research work deals with an optimization of tu rning process by the effect of machining parameters applying ANOVA &Taguchi methods to improve the qual ity of manufactured goods and engineering development of designs for studying variation. More over,iron in steel has greater affinity towards ca rbon of WC of the tool. P grade is more diffusion resistant grade due to presence of more stable carbides like TiC,TaC and NbC. Therefore,P grade is also known as mi xed carbide grade and more suitable for machining steel. Since P 30 grade of cemented carbide would p rovide excellent balance of hardness,wear resistan ce and toughness,the same grade has been chosen for m achining of stainless steel. Turning is a metal cut ting process by which metals from the outer periphery of a cylindrical work piece is removed and the volume of metal removed per unit time is known as metal remov al rate or MRR. Basically MRR is an important criterion in production engineering to increase the productivity and quality. MRR varies with the vari ation of cutting parameters of different metals. In this pro ject work,Austenitic stainless steel AISI 316L is considered as work piece while spindle speed,feed rate and depth of cut are considered as cutting parameters. During turning process it is expected t hat the highest material removal rate is accomplish ed in order to achieve highest production at reduced time and cost and therefore it becomes very important i ssue to precisely study the effect of turning parameters . The results of analysis show that depth of cut an d spindle speed have the most significant contribution on the material removal rate and feed rate has less signi ficant contribution on the material removal rate.
This document summarizes an experimental study that optimized machining parameters for cryogenic turning of AISI 4340 steel to minimize surface roughness. The researchers used Taguchi's design of experiments methodology to test cutting speed, feed rate, depth of cut, and rake angle parameters. Analysis showed cutting speed and depth of cut most influenced surface roughness. Validation experiments confirmed the optimal parameters achieved the predicted minimum surface roughness, demonstrating cryogenic machining's ability to improve surface finish.
Melt Flow Index Tester, Melt Flow Index Tester Manufacturers and Suppliers In...Presto Group
Looking for Melt Flow Index Tester manufacturers, Melt Flow Index Tester suppliers, Melt Flow Index Tester producers, Melt Flow Index Tester exporters, Melt Flow Index Tester wholesalers, Melt Flow Index Tester production centers ? Browse PrestoGroup.com for all your testing instruments needs. For more information visit- http://www.prestogroup.com/plastic-testing-instruments/melt-flow-index-deluxe
This document summarizes a study that used Taguchi experimental design to optimize the chemical machining parameters for cold worked stainless steel 420. The study examined the effects of machining temperature, machining time, and degree of previous cold working on the surface finish. Samples with 0%, 20%, 40%, and 60% cold working were chemically machined at temperatures of 45°C, 50°C, 55°C, and 58°C for times of 2, 4, 6, and 8 minutes. Analysis of variance and regression modeling found that the degree of previous cold working was the most significant parameter affecting surface finish. The optimal conditions were determined to be 60% cold working at 45°C for 2 minutes.
Investigation of the mechanical, corrosion properties and wear behaviour of e...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
This document summarizes a study of various physical properties of lithium-borosilicate glass samples. Glass samples were prepared with compositions of 42.5Li2O-(57.5-x)B2O3-xSiO2, where x ranged from 0-57.5 mol%. Density, molar volume, oxygen packing density, ionic concentration, and inter-ionic distance were measured for the samples. The results showed that molar volume, inter-ionic distance, and polaron radius decreased with increasing SiO2 content, indicating a more loosely packed glass structure. Oxygen packing density and ionic concentration also decreased with higher SiO2. The glass transition temperature was found to decrease with increasing
International Journal of Engineering Research and DevelopmentIJERD Editor
This document discusses power quality enhancement using Flexible AC Transmission System (FACTS) devices. It provides an overview of various FACTS devices including Static Var Compensator (SVC), Static Synchronous Compensator (STATCOM), and Static Synchronous Series Compensator (SSSC). MATLAB simulations of systems using SVC, STATCOM and SSSC are presented to demonstrate how each FACTS device can improve power quality by mitigating issues like voltage fluctuations and power oscillations. The document concludes that FACTS devices provide better power quality under varying source voltages and sudden loading conditions.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
This document analyzes a prey-predator model with a harvested predator species using a Holling type IV functional response. It contains the following key points:
1) A prey-predator differential equation model is presented that includes harvesting of the predator species. The model is analyzed to find equilibrium points.
2) Three equilibrium points are identified: the trivial equilibrium of both species extinct, a prey-only axial equilibrium, and a possible interior equilibrium where both species coexist.
3) A stability analysis is conducted of the equilibrium points by analyzing the eigenvalues of the Jacobian matrix evaluated at each point. Conditions for local stability of the equilibrium points are derived.
4) Numerical simulations and bifurcation
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
This document analyzes and compares different routing protocols for mobile ad hoc networks (MANETs). It begins with background on MANETs and their characteristics. It then classifies routing protocols into proactive (table-driven) and reactive (on-demand) categories. For each category, several representative protocols are described in detail, including DSDV, WRP, CGSR, DSR, AODV, ABR, SSA, and TORA. Their routing mechanisms and approaches to route discovery and maintenance are outlined. The document aims to provide an overview of major MANET routing protocols to help determine the most suitable ones for different network conditions.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
This document presents a mathematical model for simulating the diffusion of microbes injected during microbial enhanced oil recovery (MEOR) processes in porous media. The model is based on a diffusion equation that describes the transport and distribution of microbes over time. Computer simulations using the model produce 3D views showing higher microbial concentration in the center of the porous media that decreases towards the outer boundaries due to diffusion. The model and simulations indicate that microbial diffusion can effectively distribute microbes through the reservoir during MEOR, but an uncontrolled process risks permeability damage that would counter the intended effects.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
This document presents a dynamic model and control strategy for a grid-connected hybrid wind and photovoltaic (PV) power generation system. It describes models for the key system components, including a variable speed wind turbine with permanent magnet synchronous generator (PMSG), PV array, and power conditioning system. The power conditioning system uses boost converters to regulate the DC link voltage from the wind and PV sources. A voltage source inverter and PQ controller are used to interface the hybrid system and deliver power to the grid while maintaining a stable common DC bus voltage. Simulation results show the feasibility of the proposed hybrid power system for distributed energy applications.
International Journal of Engineering Research and DevelopmentIJERD Editor
This paper analyzes the relative consistency coefficients of two-layered blood flow through a narrow vessel. Blood is modeled as a Newtonian fluid in the peripheral plasma layer and a Bingham plastic fluid in the core layer. Equations are derived to model the flow in each layer and determine the relative coefficient of viscosity. Numerical computations are presented for varying hematocrit, yield stress, and shape parameter values. The results show that the relative consistency coefficient increases with hematocrit and yield stress, and decreases with the radius of the vessel. This two-layered blood flow model could provide better understanding of blood flow in narrow vessels.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and DevelopmentIJERD Editor
This study experimentally validates the numerical simulation of a vibrating system with three degrees of freedom using the power input method. The system consists of three aluminum plates connected by springs and dampers. Numerical simulations were conducted in MATLAB to model the energy dissipated by the system under persistent loading. Experimental tests were then carried out on a physical model of the three plate system. The results showed good agreement between the theoretical predictions and experimental measurements for displacements, velocities, energies, and total energy transferred between plates over time. Some minor differences were attributed to approximations in the numerical model and vibrations from the test mounting surface.
International Journal of Engineering Research and DevelopmentIJERD Editor
This document discusses a study on the effect of temperature on the properties of high strength concrete containing metakaolin. Concrete cubes, cylinders and prisms with 0% and 15% replacement of cement with metakaolin were cast and tested. The strengths - compressive, split tensile and flexural, were tested at 28 and 91 days and after exposure to temperatures of 100°C, 300°C and 500°C. The results show that 15% metakaolin concrete achieved higher strength compared to plain concrete. However, at temperatures above 300°C, the metakaolin concrete exhibited more severe strength loss and spalling compared to plain concrete due to its dense pore structure.
This document advertises a 3-hour "Preparation O" training program that prepares companies for an unannounced OSHA inspection through a mock drill. It warns that since 2016, OSHA fines have increased by 78% to an average of $12,500 and that scheduling the training can help reduce liability and potential fines. The training company claims their program makes safety profitable, effective and affordable for businesses.
Optimization of PVC Pipes Production ProcessIRJET Journal
This document summarizes a study that optimized the production process for PVC pipes through experimentation and analysis using the Taguchi method. The researchers identified key process parameters like temperature, pressure, and feed rate that influence pipe wall thickness. Experiments were conducted using an L9 orthogonal array to test different parameter levels. Analysis in Minitab found the optimal parameter settings that minimized defects and maximized strength - a barrel temperature of 200°C, die temperature of 175°C, extruder speed of 22 rpm, and pressure of 175 MPa. The Taguchi method proved effective for process optimization, and setting process parameters based on the results was expected to enhance productivity for the PVC pipe manufacturer.
Analysis of Process Parameters for Optimization of Plastic Extrusion in Pipe ...IJERA Editor
The objective of this paper is to study the defects in the plastic pipe, to optimize the plastic pipe manufacturing process. It is very essential to learn the process parameter and the defect in the plastic pipe manufacturing process to optimize it. For the optimization Taguchi techniques is used in this paper. For the research work Shivraj HY-Tech Drip Irrigation pipe manufacturing, Company was selected. This paper is specifically design for the optimization in the current process. The experiment was analyzed using commercial Minitab16 software, interpretation has made, and optimized factor settings were chosen. After prediction of result the quality loss is calculated and it is compare with before implementation of DOE. The research works has improves the Production, quality and optimizes the process.
Quality Control Analysis of Natural Gas Condensate Products through Refining Process
Sarker, K., Faruque, M.O. (2017).Quality Control Analysis of Natural Gas Condensate Products through Refining Process.In International Conference on Engineering, Research, Innovation and Education.Shahjalal University of Science and Technology, Sylhet, Bangladesh, January 13-15. Sylhet, Bangladesh: School of Applied Sciences and Technology. 529-534.
The document discusses monitoring programs for critical equipment in ammonia plants to improve reliability and uptime. It outlines key performance indicators to monitor for various units, such as the primary reformer, secondary reformer, and shift converters. Monitoring parameters like temperatures, pressures, emissions and efficiencies can help identify problems early before catastrophic failures and keep the plant running optimally.
Analysis of Foundry defects and Quality improvement of Sand castingIRJET Journal
This document summarizes a research paper that analyzed defects in sand casting and improved casting quality using design of experiments. The researchers:
1. Identified common casting defects like cold shut and hot tear that compromised quality using Pareto analysis and Ishikawa diagrams.
2. Selected parameters like pouring temperature, gating system and pouring time to optimize using Taguchi methods. Experiments were conducted using orthogonal arrays.
3. Analyzed results and found that reducing defects by 20-30% was possible by using optimal parameter levels identified. Rejection rates dropped to 3.4%, showing quality improvement.
Simulation and Optimization of Cyclohexanone Ammoximation Process Over TS-1 C...IRJET Journal
This document describes the simulation and optimization of a cyclohexanone ammoximation process over a TS-1 catalyst using Aspen Plus software. The process involves the reaction of cyclohexanone with ammonia and hydrogen peroxide to produce cyclohexanone oxime. Equilibrium and kinetic reactors are modeled to simulate the reaction. Sensitivity analyses are performed to determine the optimal temperature, pressure, and reactant amounts. The results show that maximum cyclohexanone oxime concentration is achieved at a reactor temperature of 80°C and pressure of 0.25 MPa. A kinetic model is developed and validated against experimental data to design an optimized continuous stirred tank reactor for the process.
IRJET- Experimental Analysis on Performance of Closed Loop Pulsating Heat Pip...IRJET Journal
This document analyzes the performance of a closed loop pulsating heat pipe (CLPHP) using aluminum oxide nanofluid (Al2O3/water) as the working fluid. An experimental setup is described that includes a CLPHP with evaporator, adiabatic, and condenser sections. Nanofluids with 0.25%, 0.5%, 0.75%, and 1% Al2O3 nanoparticle concentrations by weight were tested, along with pure water. Testing was conducted by varying the heat input and measuring temperatures. Results showed that thermal resistance decreased with increasing heat load and nanofluid concentration, indicating nanofluids improved heat transfer performance over pure water. The 1% nanofluid provided the lowest thermal resistance
Investigation of Significant Process Parameter in Manganese Phosphating of Pi...IJERA Editor
The aim of this study is to determine the most significant parameter such as phosphating bath temperature,
phosphating time,accelerator level on the fatigue life of piston pin material such as 40NiCr4Mo3 by analysis of
variance (ANOVA).The selected three imput parameters were studied at three different level by conducting nine
experiments based on L9 orthogonal array of Taguchi’s methodology.Phosphating bath temperature has
significant effect on fatigue strength followed by phosphating time and accelerator level.
Quantification of energy losses and performance improvement in dx cooling by ...IAEME Publication
The document summarizes:
1. An analysis of the performance of direct expansion bulk milk cooling systems using exergy analysis to identify inefficiencies.
2. The main components studied were the compressor, condenser, evaporator, and expansion valve. Testing of an existing "old model" system was performed and compared to a new design model with modifications to the evaporator.
3. Results showed the new model improved the coefficient of performance by 0.6-0.8 and reduced irreversibilities in the main components, with an associated energy savings of 0.6-0.8 kW.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
A furnace convection section model was developed to analyze why furnaces at an ethylene plant were underutilized. Analysis of furnace operation history and an on-site model validated with plant data identified that throughput was limited by high metal temperatures in the convection section. A test run using the model increased furnace throughput by 20% and identified bottlenecks. Recommendations to introduce steam flow helped control temperatures and further increase capacity.
LU-VE has experience producing heat exchangers for refrigeration and HVAC, especially with natural refrigerants like CO2. They presented on CO2 heat exchangers and their work on the NXTHPG project. Their CO2 test facility in Europe allows them to test heat exchangers under stationary conditions. Software predictions of capacity and pressure drop generally match test results well within 10%. Testing of CO2 evaporators showed capacity increases with Reynolds number as expected. Their 5mm tube CO2 coil for the NXTHPG project was smaller and lighter than the standard design while maintaining performance. CFD analysis helped optimize the fan configuration to increase COP by 2%.
IRJET- Investigation of Mechanical Properties of Poly Lactic Acid Embedded Na...IRJET Journal
This document investigates the mechanical properties of structures made using fused deposition modelling that are embedded with natural fibers such as cotton and sheep wool. Samples were made with varying numbers of laminates, infill densities, and raster angles. Tensile and flexural testing was performed according to ASTM standards and the results were statistically analyzed. It was found that maximum tensile and flexural strength occurred with 4 laminates, 100% infill density, and a 90° raster angle. The number of laminates and infill density had a direct proportional relationship with strength, while raster angle was found to be an insignificant parameter.
Reducing Manufacturing Cost through Value Stream MappingEditor IJCATR
To survive in today's competitive world, companies require low costs and high customer service levels. As such,
companies pay more effort to reduce their manufacturing cost. Value stream mapping CVSM) technique has been used on a broad
scale in big companies such as toyato and boeing. This paper considers the implementation of value stream mapping technique in
manufacturing technical spring by railway spring manufacturing company. It focuses on product family, current state map and the
future state map. The aim is to identify waste in the form of non value added activities and processes and than removing them to
improve the performance of the company. Current state map is prepared to describe the existing position and various problem
areas. Future state map is prepared to show the proposed improvement action plans. The achievements of value stream mapping
implementation are reduction in manufacturing cost. It was found that even a small company make significant improvements by
adopting VSM technology. It was concluded that if we adopt the VSM technique the company could reduce the manufacturing
cost from 62.5Cr to 61.88Cr
This document describes how to evaluate competing cryogenic process design alternatives for a new natural gas processing project. It provides an example comparison of two designs - a Gas Subcooled Process and a Residue Recycle Process. The key steps are to tabulate design parameters from each submission, identify differences in assumptions, and adjust submissions to use consistent assumptions to allow for an accurate comparison. In the example, adjusting theResidue Recycle Process design to be consistent revealed that the Gas Subcooled Process was a better choice given the constraints of the existing compressor package. Properly evaluating design alternatives requires maintaining consistency across submissions.
Implementation of statistical quality control (s.q.c.) in welded stainless st...eSAT Publishing House
This document discusses the implementation of statistical quality control (SQC) tools in stainless steel welded pipe manufacturing to reduce defects and improve quality. Control charts like X-bar and R charts were used to monitor the pipe diameter manufacturing process and determine if it was in or out of control. The results found the process to be in control with an average pipe diameter of 81.18mm, within specifications of 81.20mm +/- 0.10mm tolerance. Implementing SQC through control charts helped the company detect assignable causes of defects like ovality and improve productivity by maintaining a stable, in-control process.
ANALYSIS OF SHRINKAGE AND WARPAGE DISPLACEMENT USING CONFORMAL COOLINGIRJET Journal
The document analyzes the use of conformal cooling channels in injection molding to reduce shrinkage and warpage compared to conventional cooling channels. It describes simulating injection molding processes using conformal and conventional cooling channels and comparing the results. The study finds conformal cooling channels significantly reduce shrinkage, warpage, and dimensional inaccuracies while improving cooling efficiency and reducing cycle times. In conclusion, conformal cooling offers advantages over conventional cooling that can enhance part quality and productivity.
The document provides an overview of design of experiments (DOE) and factorial experiments. It defines key terms like factors, levels, treatments, responses, and noise. It explains the objectives of conducting experiments and the different types of experiments. It provides examples of 2-factor and 3-factor factorial experiments and how to analyze them. It discusses the principles of replication, randomization, and blocking. Finally, it demonstrates how to set up and analyze a general full factorial design with factors having more than two levels.
Effect of Fast Pyrolysis Operating Conditions on Product Yield of Red Meranti...IRJET Journal
1) The document investigates the effect of operating conditions on product yield from fast pyrolysis of red meranti sawdust.
2) It finds that bio-oil yield is maximized at 450°C, a nitrogen flow rate of 25 L/min, and a retention time of 60 minutes for sawdust particles sized 0.3 mm.
3) Temperature has the strongest influence on bio-oil yield, followed by nitrogen flow rate and retention time, while particle size has a negligible effect.
IRJET- A Case Study for Overall Equipment Effectiveness Improved in Manufactu...IRJET Journal
This document presents a case study on improving overall equipment effectiveness (OEE) in a manufacturing industry. It discusses how OEE is calculated based on availability, performance rate, and quality rate. The study was conducted at Avison Industry in Kolhapur, India. Data was collected on production rates and downtime reasons. It was found that the performance rate was below 95%, indicating room for improvement. Various problems were identified through analysis, such as hole shifting during drilling. Solutions proposed included modifying fixtures, combining drilling and reaming, and changing the production process flow. After implementing solutions, the OEE values improved to above 95%, meeting benchmarks for effective equipment performance.
Similar to International Journal of Engineering Research and Development (20)
A Novel Method for Prevention of Bandwidth Distributed Denial of Service AttacksIJERD Editor
Distributed Denial of Service (DDoS) Attacks became a massive threat to the Internet. Traditional
Architecture of internet is vulnerable to the attacks like DDoS. Attacker primarily acquire his army of Zombies,
then that army will be instructed by the Attacker that when to start an attack and on whom the attack should be
done. In this paper, different techniques which are used to perform DDoS Attacks, Tools that were used to
perform Attacks and Countermeasures in order to detect the attackers and eliminate the Bandwidth Distributed
Denial of Service attacks (B-DDoS) are reviewed. DDoS Attacks were done by using various Flooding
techniques which are used in DDoS attack.
The main purpose of this paper is to design an architecture which can reduce the Bandwidth
Distributed Denial of service Attack and make the victim site or server available for the normal users by
eliminating the zombie machines. Our Primary focus of this paper is to dispute how normal machines are
turning into zombies (Bots), how attack is been initiated, DDoS attack procedure and how an organization can
save their server from being a DDoS victim. In order to present this we implemented a simulated environment
with Cisco switches, Routers, Firewall, some virtual machines and some Attack tools to display a real DDoS
attack. By using Time scheduling, Resource Limiting, System log, Access Control List and some Modular
policy Framework we stopped the attack and identified the Attacker (Bot) machines
Hearing loss is one of the most common human impairments. It is estimated that by year 2015 more
than 700 million people will suffer mild deafness. Most can be helped by hearing aid devices depending on the
severity of their hearing loss. This paper describes the implementation and characterization details of a dual
channel transmitter front end (TFE) for digital hearing aid (DHA) applications that use novel micro
electromechanical- systems (MEMS) audio transducers and ultra-low power-scalable analog-to-digital
converters (ADCs), which enable a very-low form factor, energy-efficient implementation for next-generation
DHA. The contribution of the design is the implementation of the dual channel MEMS microphones and powerscalable
ADC system.
Influence of tensile behaviour of slab on the structural Behaviour of shear c...IJERD Editor
-A composite beam is composed of a steel beam and a slab connected by means of shear connectors
like studs installed on the top flange of the steel beam to form a structure behaving monolithically. This study
analyzes the effects of the tensile behavior of the slab on the structural behavior of the shear connection like slip
stiffness and maximum shear force in composite beams subjected to hogging moment. The results show that the
shear studs located in the crack-concentration zones due to large hogging moments sustain significantly smaller
shear force and slip stiffness than the other zones. Moreover, the reduction of the slip stiffness in the shear
connection appears also to be closely related to the change in the tensile strain of rebar according to the increase
of the load. Further experimental and analytical studies shall be conducted considering variables such as the
reinforcement ratio and the arrangement of shear connectors to achieve efficient design of the shear connection
in composite beams subjected to hogging moment.
Gold prospecting using Remote Sensing ‘A case study of Sudan’IJERD Editor
Gold has been extracted from northeast Africa for more than 5000 years, and this may be the first
place where the metal was extracted. The Arabian-Nubian Shield (ANS) is an exposure of Precambrian
crystalline rocks on the flanks of the Red Sea. The crystalline rocks are mostly Neoproterozoic in age. ANS
includes the nations of Israel, Jordan. Egypt, Saudi Arabia, Sudan, Eritrea, Ethiopia, Yemen, and Somalia.
Arabian Nubian Shield Consists of juvenile continental crest that formed between 900 550 Ma, when intra
oceanic arc welded together along ophiolite decorated arc. Primary Au mineralization probably developed in
association with the growth of intra oceanic arc and evolution of back arc. Multiple episodes of deformation
have obscured the primary metallogenic setting, but at least some of the deposits preserve evidence that they
originate as sea floor massive sulphide deposits.
The Red Sea Hills Region is a vast span of rugged, harsh and inhospitable sector of the Earth with
inimical moon-like terrain, nevertheless since ancient times it is famed to be an abode of gold and was a major
source of wealth for the Pharaohs of ancient Egypt. The Pharaohs old workings have been periodically
rediscovered through time. Recent endeavours by the Geological Research Authority of Sudan led to the
discovery of a score of occurrences with gold and massive sulphide mineralizations. In the nineties of the
previous century the Geological Research Authority of Sudan (GRAS) in cooperation with BRGM utilized
satellite data of Landsat TM using spectral ratio technique to map possible mineralized zones in the Red Sea
Hills of Sudan. The outcome of the study mapped a gossan type gold mineralization. Band ratio technique was
applied to Arbaat area and a signature of alteration zone was detected. The alteration zones are commonly
associated with mineralization. The alteration zones are commonly associated with mineralization. A filed check
confirmed the existence of stock work of gold bearing quartz in the alteration zone. Another type of gold
mineralization that was discovered using remote sensing is the gold associated with metachert in the Atmur
Desert.
Reducing Corrosion Rate by Welding DesignIJERD Editor
This document summarizes a study on reducing corrosion rates in steel through welding design. The researchers tested different welding groove designs (X, V, 1/2X, 1/2V) and preheating temperatures (400°C, 500°C, 600°C) on ferritic malleable iron samples. Testing found that X and V groove designs with 500°C and 600°C preheating had corrosion rates of 0.5-0.69% weight loss after 14 days, compared to 0.57-0.76% for 400°C preheating. Higher preheating reduced residual stresses which decreased corrosion. Residual stresses were 1.7 MPa for optimal X groove and 600°C
Router 1X3 – RTL Design and VerificationIJERD Editor
Routing is the process of moving a packet of data from source to destination and enables messages
to pass from one computer to another and eventually reach the target machine. A router is a networking device
that forwards data packets between computer networks. It is connected to two or more data lines from different
networks (as opposed to a network switch, which connects data lines from one single network). This paper,
mainly emphasizes upon the study of router device, it‟s top level architecture, and how various sub-modules of
router i.e. Register, FIFO, FSM and Synchronizer are synthesized, and simulated and finally connected to its top
module.
Active Power Exchange in Distributed Power-Flow Controller (DPFC) At Third Ha...IJERD Editor
This paper presents a component within the flexible ac-transmission system (FACTS) family, called
distributed power-flow controller (DPFC). The DPFC is derived from the unified power-flow controller (UPFC)
with an eliminated common dc link. The DPFC has the same control capabilities as the UPFC, which comprise
the adjustment of the line impedance, the transmission angle, and the bus voltage. The active power exchange
between the shunt and series converters, which is through the common dc link in the UPFC, is now through the
transmission lines at the third-harmonic frequency. DPFC multiple small-size single-phase converters which
reduces the cost of equipment, no voltage isolation between phases, increases redundancy and there by
reliability increases. The principle and analysis of the DPFC are presented in this paper and the corresponding
simulation results that are carried out on a scaled prototype are also shown.
Mitigation of Voltage Sag/Swell with Fuzzy Control Reduced Rating DVRIJERD Editor
Power quality has been an issue that is becoming increasingly pivotal in industrial electricity
consumers point of view in recent times. Modern industries employ Sensitive power electronic equipments,
control devices and non-linear loads as part of automated processes to increase energy efficiency and
productivity. Voltage disturbances are the most common power quality problem due to this the use of a large
numbers of sophisticated and sensitive electronic equipment in industrial systems is increased. This paper
discusses the design and simulation of dynamic voltage restorer for improvement of power quality and
reduce the harmonics distortion of sensitive loads. Power quality problem is occurring at non-standard
voltage, current and frequency. Electronic devices are very sensitive loads. In power system voltage sag,
swell, flicker and harmonics are some of the problem to the sensitive load. The compensation capability
of a DVR depends primarily on the maximum voltage injection ability and the amount of stored
energy available within the restorer. This device is connected in series with the distribution feeder at
medium voltage. A fuzzy logic control is used to produce the gate pulses for control circuit of DVR and the
circuit is simulated by using MATLAB/SIMULINK software.
Study on the Fused Deposition Modelling In Additive ManufacturingIJERD Editor
Additive manufacturing process, also popularly known as 3-D printing, is a process where a product
is created in a succession of layers. It is based on a novel materials incremental manufacturing philosophy.
Unlike conventional manufacturing processes where material is removed from a given work price to derive the
final shape of a product, 3-D printing develops the product from scratch thus obviating the necessity to cut away
materials. This prevents wastage of raw materials. Commonly used raw materials for the process are ABS
plastic, PLA and nylon. Recently the use of gold, bronze and wood has also been implemented. The complexity
factor of this process is 0% as in any object of any shape and size can be manufactured.
Spyware triggering system by particular string valueIJERD Editor
This computer programme can be used for good and bad purpose in hacking or in any general
purpose. We can say it is next step for hacking techniques such as keylogger and spyware. Once in this system if
user or hacker store particular string as a input after that software continually compare typing activity of user
with that stored string and if it is match then launch spyware programme.
A Blind Steganalysis on JPEG Gray Level Image Based on Statistical Features a...IJERD Editor
This paper presents a blind steganalysis technique to effectively attack the JPEG steganographic
schemes i.e. Jsteg, F5, Outguess and DWT Based. The proposed method exploits the correlations between
block-DCTcoefficients from intra-block and inter-block relation and the statistical moments of characteristic
functions of the test image is selected as features. The features are extracted from the BDCT JPEG 2-array.
Support Vector Machine with cross-validation is implemented for the classification.The proposed scheme gives
improved outcome in attacking.
Secure Image Transmission for Cloud Storage System Using Hybrid SchemeIJERD Editor
- Data over the cloud is transferred or transmitted between servers and users. Privacy of that
data is very important as it belongs to personal information. If data get hacked by the hacker, can be
used to defame a person’s social data. Sometimes delay are held during data transmission. i.e. Mobile
communication, bandwidth is low. Hence compression algorithms are proposed for fast and efficient
transmission, encryption is used for security purposes and blurring is used by providing additional
layers of security. These algorithms are hybridized for having a robust and efficient security and
transmission over cloud storage system.
Application of Buckley-Leverett Equation in Modeling the Radius of Invasion i...IJERD Editor
A thorough review of existing literature indicates that the Buckley-Leverett equation only analyzes
waterflood practices directly without any adjustments on real reservoir scenarios. By doing so, quite a number
of errors are introduced into these analyses. Also, for most waterflood scenarios, a radial investigation is more
appropriate than a simplified linear system. This study investigates the adoption of the Buckley-Leverett
equation to estimate the radius invasion of the displacing fluid during waterflooding. The model is also adopted
for a Microbial flood and a comparative analysis is conducted for both waterflooding and microbial flooding.
Results shown from the analysis doesn’t only records a success in determining the radial distance of the leading
edge of water during the flooding process, but also gives a clearer understanding of the applicability of
microbes to enhance oil production through in-situ production of bio-products like bio surfactans, biogenic
gases, bio acids etc.
Gesture Gaming on the World Wide Web Using an Ordinary Web CameraIJERD Editor
- Gesture gaming is a method by which users having a laptop/pc/x-box play games using natural or
bodily gestures. This paper presents a way of playing free flash games on the internet using an ordinary webcam
with the help of open source technologies. Emphasis in human activity recognition is given on the pose
estimation and the consistency in the pose of the player. These are estimated with the help of an ordinary web
camera having different resolutions from VGA to 20mps. Our work involved giving a 10 second documentary to
the user on how to play a particular game using gestures and what are the various kinds of gestures that can be
performed in front of the system. The initial inputs of the RGB values for the gesture component is obtained by
instructing the user to place his component in a red box in about 10 seconds after the short documentary before
the game is finished. Later the system opens the concerned game on the internet on popular flash game sites like
miniclip, games arcade, GameStop etc and loads the game clicking at various places and brings the state to a
place where the user is to perform only gestures to start playing the game. At any point of time the user can call
off the game by hitting the esc key and the program will release all of the controls and return to the desktop. It
was noted that the results obtained using an ordinary webcam matched that of the Kinect and the users could
relive the gaming experience of the free flash games on the net. Therefore effective in game advertising could
also be achieved thus resulting in a disruptive growth to the advertising firms.
Hardware Analysis of Resonant Frequency Converter Using Isolated Circuits And...IJERD Editor
-LLC resonant frequency converter is basically a combo of series as well as parallel resonant ckt. For
LCC resonant converter it is associated with a disadvantage that, though it has two resonant frequencies, the
lower resonant frequency is in ZCS region[5]. For this application, we are not able to design the converter
working at this resonant frequency. LLC resonant converter existed for a very long time but because of
unknown characteristic of this converter it was used as a series resonant converter with basically a passive
(resistive) load. . Here, it was designed to operate in switching frequency higher than resonant frequency of the
series resonant tank of Lr and Cr converter acts very similar to Series Resonant Converter. The benefit of LLC
resonant converter is narrow switching frequency range with light load[6] . Basically, the control ckt plays a
very imp. role and hence 555 Timer used here provides a perfect square wave as the control ckt provides no
slew rate which makes the square wave really strong and impenetrable. The dead band circuit provides the
exclusive dead band in micro seconds so as to avoid the simultaneous firing of two pairs of IGBT’s where one
pair switches off and the other on for a slightest period of time. Hence, the isolator ckt here is associated with
each and every ckt used because it acts as a driver and an isolation to each of the IGBT is provided with one
exclusive transformer supply[3]. The IGBT’s are fired using the appropriate signal using the previous boards
and hence at last a high frequency rectifier ckt with a filtering capacitor is used to get an exact dc
waveform .The basic goal of this particular analysis is to observe the wave forms and characteristics of
converters with differently positioned passive elements in the form of tank circuits.
Simulated Analysis of Resonant Frequency Converter Using Different Tank Circu...IJERD Editor
LLC resonant frequency converter is basically a combo of series as well as parallel resonant ckt. For
LCC resonant converter it is associated with a disadvantage that, though it has two resonant frequencies, the
lower resonant frequency is in ZCS region [5]. For this application, we are not able to design the converter
working at this resonant frequency. LLC resonant converter existed for a very long time but because of
unknown characteristic of this converter it was used as a series resonant converter with basically a passive
(resistive) load. . Here, it was designed to operate in switching frequency higher than resonant frequency of the
series resonant tank of Lr and Cr converter acts very similar to Series Resonant Converter. The benefit of LLC
resonant converter is narrow switching frequency range with light load[6] . Basically, the control ckt plays a
very imp. role and hence 555 Timer used here provides a perfect square wave as the control ckt provides no
slew rate which makes the square wave really strong and impenetrable. The dead band circuit provides the
exclusive dead band in micro seconds so as to avoid the simultaneous firing of two pairs of IGBT’s where one
pair switches off and the other on for a slightest period of time. Hence, the isolator ckt here is associated with
each and every ckt used because it acts as a driver and an isolation to each of the IGBT is provided with one
exclusive transformer supply[3]. The IGBT’s are fired using the appropriate signal using the previous boards
and hence at last a high frequency rectifier ckt with a filtering capacitor is used to get an exact dc
waveform .The basic goal of this particular analysis is to observe the wave forms and characteristics of
converters with differently positioned passive elements in the form of tank circuits. The supported simulation
is done through PSIM 6.0 software tool
Amateurs Radio operator, also known as HAM communicates with other HAMs through Radio
waves. Wireless communication in which Moon is used as natural satellite is called Moon-bounce or EME
(Earth -Moon-Earth) technique. Long distance communication (DXing) using Very High Frequency (VHF)
operated amateur HAM radio was difficult. Even with the modest setup having good transceiver, power
amplifier and high gain antenna with high directivity, VHF DXing is possible. Generally 2X11 YAGI antenna
along with rotor to set horizontal and vertical angle is used. Moon tracking software gives exact location,
visibility of Moon at both the stations and other vital data to acquire real time position of moon.
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Ivanti’s Patch Tuesday breakdown goes beyond patching your applications and brings you the intelligence and guidance needed to prioritize where to focus your attention first. Catch early analysis on our Ivanti blog, then join industry expert Chris Goettl for the Patch Tuesday Webinar Event. There we’ll do a deep dive into each of the bulletins and give guidance on the risks associated with the newly-identified vulnerabilities.
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5th LF Energy Power Grid Model Meet-up SlidesDanBrown980551
5th Power Grid Model Meet-up
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Power Grid Model
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Monitoring and Managing Anomaly Detection on OpenShift.pdfTosin Akinosho
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
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- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
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12. Jupyter Notebooks with Code Examples
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Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
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What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
UiPath Test Automation using UiPath Test Suite series, part 6
International Journal of Engineering Research and Development
1. International Journal of Engineering Research and Development
e-ISSN: 2278-067X, p-ISSN: 2278-800X, www.ijerd.com
Volume 10, Issue 7 (July 2014), PP.10-15
Process Optimization of a Local Steel bar Manufacturing
Firm Using SPC and ANOVA
KhawarNaeem1, Prof. Dr. Iftikhar Hussain2,
1,2Industrial Engg. Deptt., University of Engineering and Technology, Peshawar, Pakistan.
Abstract:- In a steel bar manufacturing industry, identification of significant factors which affect the process
efficiency is of prime importance to achieve maximum yield. In the undertaken research study, reheating
furnace temperature of 1050 ᴼC of a local steel bar manufacturing facility of Peshawar, Pakistan is found to be
statistically significant with the help of analysis of variance (ANOVA) experimentation. The second analysed
temperature level is 900 ᴼC which comes out to be insignificant. At 1050 ᴼC temperature, minimum production
scrap is found and z. bench quality standard is also improved. For yield strength quality characteristic of the
product the scrap level is 90% less than the production at 900 ᴼC while the z. bench level is improved to 28%.
At same temperature of 1050 ᴼC, production scrap is reduced over 42% and z. bench is improved to 11% for
ultimate tensile strength quality characteristic. 1050 ᴼC temperature of the reheating furnace of the steel bar
manufacturing process is statistically found to be optimum temperature level of production.
Keywords:- Yield, Analysis of variance (ANOVA), Steel bar manufacturing process
I. INTRODUCTION
In today’s competitive world, manufacturing firms are bound to bring efficiency in their production
process. The process efficiency reduces the process variation and increase the quality of the product. This
process variation control ultimately optimizes the yield and minimizes the scrap. The reduction in scrap level
increase the profit margins of the company and make company able to meet the customer demands on time and
increase their satisfaction level.
Statistical process control (SPC) is the statistical tools used to improve the process quality and reduce
the variability of the process. By the reduction of variability, the quality is improved as quality is inversely
proportional to variance of the process [1]. In any manufacturing process, there present two types of causes of
variance. First is the chance causes or also called natural causes of variance. The examples of chance causes
include temperature and humidity fluctuation, and electricity fluctuation. These types of variations are present in
every process and cannot be completely eliminated. Second cause of variance is the assignable cause or special
causes of variation of the process. They include operator mistakes, measurement error, and tool wear. If only
natural causes of variations are present, the process is said to be in-control. If there present special causes of
variation, the process is said to be out of control. To bring process in control state, special causes of variability
must be eliminated [2]. The quality of the treated water is improved with the successful usage of SPC. The use
of control charts and descriptive statistics helped the researcher to analyze the water treatment plant and monitor
the process parameters [3]. Statistical process control (SPC) is one of the key elements for the success of
manufacturing firms. In small and medium industries, the knowledge of SPC is quite less compare to the big
companies. This issue impedes the growth of small industries in long run. In the proposed research work, eSPC
methodology is introduced which is an online SPC service for the small and medium industries. This package
includes several quality control charts and important information analysis based on the data provided by the user
companies. This method cost less compared to the physical quality control department and is found to be fruitful
for discrete manufacturing organizations [4].
In a steel manufacturing industry of Japan, desired quality of the product is achieved with the help of
expert system. The expert system is a decision support system that take the process parameter input values with
the help of sensors, analyse the information and set the production settings accordingly to get a desired quality
of the product. This is an effective but expensive technique of quality control and cannot be implemented in
small production units[5]. In Indonesia, process efficiency of an asbestos manufacturing unit is optimized using
DOE. Significant factors affecting the process efficiency are identified. The optimum curing temperature
identified is 350 ᴼC. With the successful application of the DOE, curing time is also reduced by one hour. Hence
the production efficiency is improved as a result[6]. Optimum factors and levels for a textile industry is
identified using DOE and regression analysis. The significant factors include thickness of the needle (factor A),
size content of the fabric (factor B), twist per inch of thread (factor C), and number of threads per square inch
(factor D). In the regression model, textile defects is set as the response and the significant factors are employed
in the regression model as input variables to reduce the response. The optimum levels of factor A, B, C and D
10
2. Process optimization of a local Steel Bar Manufacturing Firm using SPC and ANOVA
are 0.75mm, 5%, 15 and 52 * 52 respectively. At these levels of the factors, minimum textile defects are
observed. The regression model made in the research can be used in any textile industry to achieve good textile
quality. DOE and regression model can be applied to any other manufacturing unit to find out the significant
factors and optimum level that affect the quality of the product and ultimately to the process yield[7]. To
improve the yield strength of the steel bar, DOE and Taguchi method of orthogonal array is used to optimize the
process parameter. Water pressure at quenching is found to be statistically significant. As the water pressure
during quenching is held to an optimum level, reduced standard deviation is noticed in the production process.
Optimum water pressure of quenching unit is found to be 10 bar. Other selected factors of experimentation
include cooling rate, speed of the bar, and temperature of the finish rolling bar. With the help of ANOVA study,
it is revealed that water pressure has the highest significant effect on the yield strength, with F-ratio of 90.82 and
overall 67% contribution[8].
Past research indicates that SPC, DOE and ANOVA can be used to improve the process performance
of a manufacturing firm. In the undertaken research, rejection rate is minimized and process efficiency is
improved by the reduction of process variation. In the subsequent section, a detailed methodology of the
research study is presented.
II. METHODOLOGY
Scrap generation at a local ABC steel bar manufacturing facility, Peshawar is analyzed to know the
significant factors that are contributing towards it. The product selected is 60 grade steel bar of Ø25mm. After
the group discussion with the quality and production department and scrap analysis, it is revealed that reheating
temperature of the furnace is the main factor that leads to scrap generation. The temperature level affects the
quality of the steel bar produced. It is needed to investigate the variation of the temperature level that affects the
quality of the product and ultimately contribute towards the scrap of the process.
Analysis of variance of temperature:
An analysis of variance (ANOVA) is performed to test the hypothesis that if there is a significant
difference between the two temperature levels. To perform the ANOVA, hypothesis testing with 95%
confidence level (α=5%) is performed and is shown below:
Null Hypothesis: Hᴼ; μ900 ᴼC = μ1050 ᴼC
Alternate Hypothesis: H1; μ900 ᴼC ≠ μ1050 ᴼC
To perform the hypothesis testing, an experiment is designed to test the effect of reheating furnace
temperature on the scrap rate. The test is performed in two phases. In the first phase, 1 ton production of 60
grade steel bar of Ø25mm is carried out and the scrap generated is noted down as shown in Table 1. The
production is replicated five times and their results are summarized in the Table 1. For the reheating furnace
temperature of 900 ᴼ C scrap generated is 18 kg, 12 kg, 16 kg, 14 kg, and 13 kg with their respective production
of 1 ton each. And the scrap noted is 6 kg, 8 kg, 11 kg, 4 kg, and 9 kg for the temperature level of 1100 ᴼ C at
each production turn of 1 ton.
Table 1: Observed Scrap
11
Replication
Temperature Level
Scrap at
900 ᴼ C
(kg)
Scrap at
1050 ᴼ C
(kg)
1 18 6
2 12 8
3 16 11
4 14 4
5 13 9
The gathered data is analyzed using Minitab, and analysis of variance is performed to know if there is
significant difference between both the temperature levels. A p-value of 0.003 is obtained which is less than
0.05 set confidence level, as α=0.05 as shown in Table 2. As p-value is less than the α-value, null hypothesis is
rejected and it is concluded that there is a significant difference in the temperature level of the reheating furnace.
R-Square value of 70.04% shows that the temperature of the reheating furnace is a factor which is responsible
for 70.04% scrap of the process. The remaining percentage of the scrap is due to other factors which are not
taken in the current research study.
3. Process optimization of a local Steel Bar Manufacturing Firm using SPC and ANOVA
Table 2: One-way analysis of variance results
Source P value R-Square value
Temperature of reheating furnace 0.003 70.04%
It is further noticed that both the reheating temperature of the furnace are not same and the level of the
reheating furnace temperature affects the quality of the steel bar produced and yield of the process in turn.
Further it is needed to investigate that which temperature level should be used to acquire maximum yield of the
steel bar manufacturing process. This investigation is carried out in the subsequent section.
To test the quality of the steel bar, two critical to quality (CTQ) parameters are yield strength (YS) and
ultimate tensile strength (UTS). In this section, the effect of the reheating temperature on the YS of 60 grade
steel bar of Ø25mm is analyzed. The lower specification limit (LSL) for YS of the product under investigation
is 60 kilo pound per square inch (KSI).
The process capability in term of yield strength for 900 ᴼ C reheating temperature is conducted as
shown in Figure 1. A sample of 900 steel bar is tested using universal testing machine (UTM) in the
manufacturing facility. The mean and standard deviation of the process for YS is 68 KSI and 3.83 KSI
respectively. The Z.bench quality standard value is 2.09. Cpk and Ppk is 0.68 and 0.70 respectively. The process
performance is measured in terms of percent rejected parts that lie below the LSL of the product. The rejection
of the process for YS is 1.84%.
56 60 64 68 72 76 80
Potential (Within) C apability
O v erall C apability
O bserv ed Performance
Exp. Within Performance
Exp. O v erall Performance
Figure 1: Process capability for yield strength at 900ᴼ C
Process Data
For 1050 ᴼ C reheating temperature, process capability of 60 grade steel bar of Ø25mm is analyzed in
terms of YS as shown in Figure 2. The mean and standard deviation of the process at 1050 ᴼ C comes out to be
69 KSI and 3.14 KSI respectively. The Cpk and Ppk is 0.94 and 0.96 respectively. The Z.bench is 2.89. The
scrap at 1050 ᴼ C reheating temperature is 0.19%. The scrap noticed at 1050 ᴼ C reheating temperature is 90%
less than the scrap at 900 ᴼ C reheating temperature.
12
LSL
LSL 60
Target *
USL *
Sample Mean 68.0033
Sample N 900
StDev (Within) 3.89945
StDev (O v erall) 3.83111
Z.Bench 2.05
Z.LSL 2.05
Z.USL *
C pk 0.68
Z.Bench 2.09
Z.LSL 2.09
Z.USL *
Ppk 0.70
C pm *
% < LSL 1.44
% > USL *
% Total 1.44
% < LSL 2.01
% > USL *
% Total 2.01
% < LSL 1.84
% > USL *
% Total 1.84
Within
Overall
Process Capability of 900C_YS
4. Process optimization of a local Steel Bar Manufacturing Firm using SPC and ANOVA
LSL
Process Capability of 1050C_YS
60 63 66 69 72 75 78
Process Data
LSL 60
Target *
USL *
Sample Mean 69.0956
Sample N 900
StDev (Within) 3.23505
StDev (O v erall) 3.14425
Within
Overall
Potential (Within) C apability
Exp. Within Performance
% < LSL 0.25
% > USL *
% Total 0.25
Exp. O v erall Performance
% < LSL 0.19
% > USL *
% Total 0.19
Figure 2: Process capability for yield strength at 1050ᴼ C
Z.Bench 2.81
Z.LSL 2.81
Z.USL *
C pk 0.94
O v erall C apability
Z.Bench 2.89
Z.LSL 2.89
Z.USL *
Ppk 0.96
C pm *
O bserv ed Performance
% < LSL 0.00
% > USL *
% Total 0.00
All the process performance parameters are improved as the process is run at temperature of reheating
furnace as shown in Table 3. A significant reduction of 89.67% in process scrap is noticed as the reheating
furnace temperature is set on 1050ᴼ C. The maximum yield of the steel bar manufacturing process is achieved at
1050ᴼ C.
Table 3: Process performance in terms of YS
Process Capability of 900C_UTS
LSL
84 88 92 96 100 104 108 112
Exp. O v erall Performance
13
Sr.
No
Performance
parameter
Process
performance
at 900ᴼC
Process
performance
at 1050ᴼC
Percent
Improvement
1 Standard deviation 3.83 3.14 18.02
2 Z. Bench 2.09 2.89 27.68
3 Cpk 0.68 0.94 27.66
4 Ppk 0.7 0.96 27.08
5 % Scrap 1.84 0.19 89.67
Second CTQ characteristic of 60 grade steel bar of Ø25mm is UTS. The LSL of the product for UTS is
90 kilo pound per square inch (KSI).
For UTS analysis of the product, the process capability at 900ᴼC reheating temperature is shown in
Figure 3. The mean and standard deviation of the process for UTS is 98 KSI and 4.42 KSI respectively while the
given LSL is 90 KSI. The value of the Z.bench is 1.89. The value for Cpk and Ppk is 0.63 each. The process
rejects due to UTS are 2.95%.
Process Data
LSL 90
Target *
USL *
Sample Mean 98.3447
Sample N 1500
StDev (Within) 4.44533
StDev (O v erall) 4.42043
Within
Overall
Potential (Within) C apability
Z.Bench 1.88
Z.LSL 1.88
Z.USL *
C pk 0.63
O v erall C apability
Z.Bench 1.89
Z.LSL 1.89
Z.USL *
Ppk 0.63
C pm *
O bserv ed Performance
% < LSL 2.20
% > USL *
% Total 2.20
Exp. Within Performance
% < LSL 3.02
% > USL *
% Total 3.02
% < LSL 2.95
% > USL *
% Total 2.95
Figure 3: Process capability for ultimate tensile strength at 900ᴼ C
5. Process optimization of a local Steel Bar Manufacturing Firm using SPC and ANOVA
The process capability for UTS at 1050ᴼC reheating temperature for 60 grade steel bar of Ø25mm is
analyzed and shown in Figure 4. The mean and standard deviation of the process is 99 KSI and 4.31 KSI
respectively. The values of Cpk and Ppk are 0.72 and 0.71 respectively. The Z.bench score is 2.12. The process
reject is reduced to 1.72% at 1050ᴼC reheating temperature, which is 2.95% at 900ᴼC reheating temperature of
the furnace.
Process Capability of 1050C_UTS
LSL
88 92 96 100 104 108 112
Process Data
LSL 90
Target *
USL *
Sample Mean 99.1187
Sample N 1500
StDev (Within) 4.23125
StDev (O v erall) 4.31103
Within
Overall
Potential (Within) C apability
Z.Bench 2.16
Z.LSL 2.16
Z.USL *
C pk 0.72
O v erall C apability
Z.Bench 2.12
Z.LSL 2.12
Z.USL *
Ppk 0.71
C pm *
O bserv ed Performance
% < LSL 1.27
% > USL *
% Total 1.27
Exp. Within Performance
% < LSL 1.56
% > USL *
% Total 1.56
Exp. O v erall Performance
% < LSL 1.72
% > USL *
% Total 1.72
Figure 4: Process capability for ultimate tensile strength at 1050ᴼ C
It is evident from the results summarized in Table 4 that reheating furnace temperature of 1050ᴼ C is
more suitable for the production of 60 grade steel bar of Ø25mm than 900ᴼ C. At 1050ᴼ C of the furnace, the
scrap is significantly reduced. A 41.69% scrap is reduced as the production line is run at 1050ᴼ C. The
dispersion of the manufacturing process is also reduced to 2.49% as measured by the process standard deviation.
At 1050ᴼ C temperature, improvements in Z.bench, Cpk and Ppk are 10.85%, 12.5%, 11.3% respectively.
Table 4: Process performance in terms of UTS
14
Sr. No Performance
parameter
Process
performance at
900ᴼC
Process
performance
at 1050ᴼC
Percent
Improvement
1 Standard deviation 4.42 4.31 2.489
2 Z. Bench 1.89 2.12 10.85
3 Cpk 0.63 0.72 12.50
4 Ppk 0.63 0.71 11.27
5 % Scrap 2.95 1.72 41.69
III. CONCLUSIONS
Process efficiency analysis of a local steel bar manufacturing industry of Peshawar, Pakistan is
performed and yield of the process is maximized. It is revealed that temperature level of the reheating furnace of
the steel bar is the key factor that affects the process efficiency. Two levels of the temperature selected for the
experimentation are 900 ᴼC and 1050 ᴼC. From the ANOVA study it is confirmed that both the temperature
levels affect the production efficiency of the steel bar manufacturing industry. Yield strength and ultimate
tensile strength of the 60 grade steel bar are two quality tests based on which yield analysis is performed and
process efficiency is studied. The process performance parameters include Z. bench, standard deviation, Cpk,
Ppk and percent scrap. The process performance for YS is improved on 1050 ᴼC of the reheating temperature of
the furnace. At 1050 ᴼC of the reheating temperature, the results for Z. bench, standard deviation, Cpk, and Ppk
are 2.89, 3.14, 0.94, and 0.96 respectively. The percent scrap at 1050 ᴼC temperature is 0.19% which is 89.67%
less than the percent scrap noticed at 900 ᴼC temperature. The process performance for UTS is also improved
when the production is carried out 1050 ᴼC of the reheating temperature of the furnace. At 1050 ᴼC temperature,
the results for Z. bench, standard deviation, Cpk, and Ppk are 2.12, 4.31, 0.72, and 0.71 respectively. The
percent scrap noticed at 1050 ᴼC temperature is 1.72% which is 41.69% less than the percent scrap generated at
900 ᴼC temperature. Hence it is experimentally revealed that reheating temperature of the furnace affects the
6. Process optimization of a local Steel Bar Manufacturing Firm using SPC and ANOVA
performance of the steel bar manufacturing process and 1050 ᴼC temperature is optimum temperature level on
which maximum yield of the process is achieved with the minimum scrap.
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