The document discusses cellular manufacturing and group technology. It defines cellular manufacturing as grouping dissimilar machines into cells dedicated to producing parts with similar design and manufacturing attributes. It describes methods for forming part families, including visual inspection, coding systems, and production flow analysis. The document also covers machine cell design and layout, quantitative analysis methods like rank order clustering, and techniques for arranging machines in a GT cell, including the Hollier method.
Group technology and cellular manufacturing aim to increase production efficiency by grouping parts and machines. Parts are classified into families based on their design and manufacturing attributes. Production flow analysis identifies part families and associated machine groupings. A composite part represents all attributes of a family. Machine cells are designed around part families, and can have single machines, manual handling, or integrated material handling between grouped machines arranged in line, loop, or rectangular layouts. Quantitative analysis helps optimize cell design factors like layout, production rate, and part routing.
Group technology (GT) and cellular manufacturing involve grouping parts into families based on their similarities and organizing production machines into cells dedicated to producing each part family. This reduces setup times, work-in-process inventory, and material handling. Rank order clustering is an algorithm that analyzes a part-machine incidence matrix to group machines into optimal cells for producing assigned part families. The document provides details on identifying part families, composite part concepts, machine cell layouts, and benefits of GT and cellular manufacturing.
Fundamentals of CAD/ CAM, Application of computers for Design and Manufacturing, Benefits of CAD/ CAM - Computer peripherals for CAD/ CAM, Design workstation, Graphic terminal, CAD/ CAM software- definition of system software and application software, CAD/ CAM database and structure. Geometric Modeling
This document provides an introduction to flexible manufacturing systems (FMS). It defines an FMS as a highly automated manufacturing cell consisting of CNC machine tools and an automated material handling system controlled by a distributed computer system. An FMS is capable of processing different part styles simultaneously and adjusting production in response to demand changes. The document discusses what gives manufacturing systems flexibility, types of flexibility, components of an FMS including workstations, material handling systems, computer control, and human resources, and characteristics of single machine cells, flexible manufacturing cells, and flexible manufacturing systems.
An FMS integrates highly automated manufacturing systems including flexible automation, CNC machines, distributed computer control, automated material handling and storage to produce a variety of parts simultaneously. It is the most automated and sophisticated type of GT cell. An FMS relies on group technology principles and consists of processing workstations like CNC machines interconnected by an automated material handling system and controlled by a distributed computer system. It is suited for mid-variety, mid-volume production and differentiates itself through its ability to change part mix and quantities in response to demand while maintaining production.
GT Definition,Implementing Group Technology (GT),four methods GT, 1.OPTIZ PARTS CLASSIFICATION AND CODING SYSTEM,2.MICLASS coding system ,CODE MDSI System,BENEFITS OF GROUP TECHNOLOGY and limitations.
Group technology and cellular manufacturing aim to increase production efficiency by grouping parts and machines. Parts are classified into families based on their design and manufacturing attributes. Production flow analysis identifies part families and associated machine groupings. A composite part represents all attributes of a family. Machine cells are designed around part families, and can have single machines, manual handling, or integrated material handling between grouped machines arranged in line, loop, or rectangular layouts. Quantitative analysis helps optimize cell design factors like layout, production rate, and part routing.
Group technology (GT) and cellular manufacturing involve grouping parts into families based on their similarities and organizing production machines into cells dedicated to producing each part family. This reduces setup times, work-in-process inventory, and material handling. Rank order clustering is an algorithm that analyzes a part-machine incidence matrix to group machines into optimal cells for producing assigned part families. The document provides details on identifying part families, composite part concepts, machine cell layouts, and benefits of GT and cellular manufacturing.
Fundamentals of CAD/ CAM, Application of computers for Design and Manufacturing, Benefits of CAD/ CAM - Computer peripherals for CAD/ CAM, Design workstation, Graphic terminal, CAD/ CAM software- definition of system software and application software, CAD/ CAM database and structure. Geometric Modeling
This document provides an introduction to flexible manufacturing systems (FMS). It defines an FMS as a highly automated manufacturing cell consisting of CNC machine tools and an automated material handling system controlled by a distributed computer system. An FMS is capable of processing different part styles simultaneously and adjusting production in response to demand changes. The document discusses what gives manufacturing systems flexibility, types of flexibility, components of an FMS including workstations, material handling systems, computer control, and human resources, and characteristics of single machine cells, flexible manufacturing cells, and flexible manufacturing systems.
An FMS integrates highly automated manufacturing systems including flexible automation, CNC machines, distributed computer control, automated material handling and storage to produce a variety of parts simultaneously. It is the most automated and sophisticated type of GT cell. An FMS relies on group technology principles and consists of processing workstations like CNC machines interconnected by an automated material handling system and controlled by a distributed computer system. It is suited for mid-variety, mid-volume production and differentiates itself through its ability to change part mix and quantities in response to demand while maintaining production.
GT Definition,Implementing Group Technology (GT),four methods GT, 1.OPTIZ PARTS CLASSIFICATION AND CODING SYSTEM,2.MICLASS coding system ,CODE MDSI System,BENEFITS OF GROUP TECHNOLOGY and limitations.
Group Technology is a manufacturing process that produces families of parts within a single production line or cell of machines. A manufacturing cell is a cluster of machines grouped together to produce a similar part family. Techniques like tacit judgment, visual inspection, classification and coding systems, and production flow analysis are used to form part families by identifying parts that require similar manufacturing processes or equipment. Rank order clustering analyzes a machine-part incidence matrix to group similar machines and components into production cells to minimize material handling needs. While cellular manufacturing offers benefits like reduced work-in-process inventory and lead times, it also faces challenges like loss of routing flexibility and difficulty balancing cells over time.
This document discusses group technology and computer aided process planning. It defines group technology as identifying and grouping similar parts to take advantage of their common design and production characteristics. The key benefits of group technology are outlined. Implementation involves identifying part families and rearranging production machines into cells dedicated to each family. Various part classification and coding systems used in group technology are also described.
This document provides an overview of the ME6703 - Computer Integrated Manufacturing course. The key topics covered include computer aided design (CAD), computer aided manufacturing (CAM), computer integrated manufacturing (CIM), and automation. The objectives are to understand how computers are applied in various manufacturing aspects like design, planning, costing, and layout. CAD is used to assist product design and modeling. CAM involves using computers to assist all manufacturing phases. CIM integrates the total manufacturing enterprise through integrated systems and data communications. Automation applies technology to accomplish processes without human assistance.
The document is a presentation on automated material handling. It discusses material handling and different types of material handling equipment such as conveyors and automated guided vehicles (AGVs). It describes AGVs in detail, including their components, guidance technologies, and types. It provides an example of calculating the number of AGVs needed based on delivery rate, cycle time, and vehicle availability. The presentation also discusses using simulation to model AGV systems and limitations of automated material handling systems.
This document discusses different layout configurations for flexible manufacturing systems (FMS). It describes five types of FMS layouts: progressive or line type, loop type, ladder type, open field type, and robot centered type. For each type, it provides a brief explanation of the layout and flow of parts. It also lists some factors that influence the selection of an FMS layout, such as availability of materials and labor, transportation infrastructure, and local business conditions.
The document discusses shop floor control and flexible manufacturing systems (FMS). It describes the key components and functions of shop floor control including order release, scheduling, and progress phases. It also explains the components, types, layout configurations and applications of FMS, including automated workstations, material handling systems, computer control, and benefits like increased flexibility and productivity.
The proper implementation and role of flexible manufacturing system in current scenario. Better understanding of different types of flexible manufacturing system layouts and types of flexible manufacturing system.
Other than these, brief introduction of flexibility and types of flexibility in manufacturing and other industries.
Introduction, Conventional and Revised with CAD/CAM Product cycle, Application of computers to the design process, comparison of capabilities of designers and computers, Reasons for implementing CAD, Benefits of CAD, CAD workstation,
GROUP TECHNOLOGY IS A MANUFACTURING
TECHNIQUE AND PHILOSOPHY TO INCREASE PRODUCTION EFFICIENCY BY EXPLOITING THE “UNDERLYING SAMENESS” OF COMPONENT
SHAPE, DIMENSIONS, PROCESS ROUTE, ETC.
Automation in manufacturing five unit vtu, mechanical engineering notes pdf d...kiran555555
This document provides an overview of automation in manufacturing systems. It discusses production systems, facilities, manufacturing support systems, and the three categories of manufacturing systems: manual work systems, worker-machine systems, and automated systems. It then covers the four functions of manufacturing support: business functions, product design, manufacturing planning, and manufacturing control. Finally, it describes the three types of automated manufacturing systems: fixed automation, programmable automation, and flexible automation.
Review on GROUP TECHNOLOGY & it’s implementationManoj Gowda K
Manufacturing philosophy which advocates simplification and standardization of similar parts in order to reduce complexity in manufacturing.
GT is a manufacturing concept in which similar parts are grouped together in parts groups families.
Unit 5 -1-ME8691 & COMPUTER AIDED DESIGN AND MANUFACTURINGMohanumar S
Group technology is a manufacturing philosophy that increases production efficiency by grouping parts with similar design and manufacturing attributes into families. Parts within a family will be produced together in batches on the same machines to reduce setup times. Common coding systems are used to classify parts into families based on their attributes, which facilitates automated process planning and machine cell design in CAD/CAM systems. Production flow analysis is a method to identify part families and machine groupings based on similarities in their production routing sheets. The composite part concept provides a hypothetical part that embodies all attributes of a family and defines what machines are needed in a manufacturing cell to produce that family.
Computer-aided process planning (CAPP) is the application of computers to assist process planners in planning functions. CAPP integrates computer-aided design (CAD) and computer-aided manufacturing (CAM) by providing a direct connection between design and manufacturing. There are two main approaches to CAPP: variant process planning and generative process planning. Variant process planning retrieves and modifies standard process plans from a database, while generative process planning creates customized process plans using decision logic and part geometry data without predefined plans. CAPP provides benefits like increased productivity, consistency of plans, accuracy of plans, and reduced costs.
Computer-Aided process planning (CAPP) aims to capture the logic, judgements, and experience required for process planning and incorporate them into computer programs that can automatically generate manufacturing operation sequences. There are three main approaches to CAPP: retrieval systems that retrieve standardized process plans, generative systems that create plans through decision logic and algorithms, and hybrid systems that combine aspects of both. CAPP reduces routine work for manufacturing engineers and aims to standardize and optimize the process planning procedure.
The document discusses various computer-aided design (CAD) standards used for data exchange, including graphics standards like GKS and OpenGL, as well as data exchange standards like IGES, DXF, and STEP. It provides details on the purpose and requirements of each standard, explaining concepts like layers, entities, and file structure. The key standards discussed are IGES for shape data exchange, DXF for CAD file interchange, and STEP for comprehensive product data across the design and manufacturing lifecycle.
CIM is the architecture for integrating the engineering, marketing and manufacturing functions through information technologies. In the broad
sense, CIM involves the integration of all the business processes from supplier to end consumer.
Gears are important machine elements used for power transmission. There are several types of gears including spur, helical, bevel, rack and pinion, and worm gears. Gears can be manufactured using various processes such as machining, powder metallurgy, stamping, and extrusion. Powder metallurgy involves mixing metal powders, compacting them into gear shapes, sintering to improve strength and density, and optional secondary operations. Form milling is a machining process that uses disc or end mill cutters to cut gear teeth by plunging the rotating cutter into the gear blank.
This document provides an overview of flexible manufacturing systems (FMS). It defines FMS and discusses their typical components such as machining stations, material handling systems, and load/unload stations. The document outlines the objectives and advantages of FMS, including increased flexibility and responsiveness to changes. It also notes some potential disadvantages like high initial costs and complexity of implementation.
This document outlines the course objectives, outcomes, modules, and content for a Computer Aided Design and Manufacturing course. The key points are:
- The course aims to teach students about concepts of computer-integrated manufacturing systems including CAD, CAM, automation, and modern trends like additive manufacturing and Industry 4.0.
- The content covers topics like CAD software, geometric modeling, computer-aided process planning, CNC machine tools, and numerical problems involving geometric transformations.
- The course objectives are for students to understand CAD/CAM applications, automated manufacturing systems, computer applications in design and manufacturing, and modern manufacturing trends leading to smart factories.
This document discusses computer aided quality control (CAQC). It introduces CAQC and explains that it uses computers to inspect and test manufactured products to ensure they meet defined quality standards. The objectives of CAQC are listed as increasing inspection and production productivity, reducing lead times and waste. The main components of CAQC are computer aided inspection (CAI) and computer aided testing (CAT). CAI uses 3D scanning and CAD modeling to check part specifications, while CAT simulates stresses and other factors to test attributes like strength. The advantages of CAQC include data harvesting, allowing 100% inspection and testing, using non-contact sensors, and providing computerized feedback control.
Unit 5-CELLULAR MANUFACTURING AND FLEXIBLE MANUFACTURING SYSTEM (FMS) .pptxdinesh babu
This document discusses cellular manufacturing and flexible manufacturing systems (FMS). It covers topics like group technology, part families, coding systems, cellular manufacturing using composite part concepts, and types of flexibility in FMS. The key aspects are that group technology involves grouping parts with similar manufacturing attributes into families to improve efficiency. Cellular manufacturing aggregates dissimilar machines into cells dedicated to producing part families based on a hypothetical composite part for each family. FMS combines CNC machines and automated material handling to flexibly produce different part families.
This document discusses group technology and computer-aided process planning. It defines group technology as a manufacturing technique that groups similar parts together to take advantage of their common design and production needs. It describes methods for forming part families and coding systems. It also discusses two types of computer-aided process planning systems: retrieval systems that store and retrieve standard process plans, and generative systems that create process plans using logical procedures similar to human planners.
Group Technology is a manufacturing process that produces families of parts within a single production line or cell of machines. A manufacturing cell is a cluster of machines grouped together to produce a similar part family. Techniques like tacit judgment, visual inspection, classification and coding systems, and production flow analysis are used to form part families by identifying parts that require similar manufacturing processes or equipment. Rank order clustering analyzes a machine-part incidence matrix to group similar machines and components into production cells to minimize material handling needs. While cellular manufacturing offers benefits like reduced work-in-process inventory and lead times, it also faces challenges like loss of routing flexibility and difficulty balancing cells over time.
This document discusses group technology and computer aided process planning. It defines group technology as identifying and grouping similar parts to take advantage of their common design and production characteristics. The key benefits of group technology are outlined. Implementation involves identifying part families and rearranging production machines into cells dedicated to each family. Various part classification and coding systems used in group technology are also described.
This document provides an overview of the ME6703 - Computer Integrated Manufacturing course. The key topics covered include computer aided design (CAD), computer aided manufacturing (CAM), computer integrated manufacturing (CIM), and automation. The objectives are to understand how computers are applied in various manufacturing aspects like design, planning, costing, and layout. CAD is used to assist product design and modeling. CAM involves using computers to assist all manufacturing phases. CIM integrates the total manufacturing enterprise through integrated systems and data communications. Automation applies technology to accomplish processes without human assistance.
The document is a presentation on automated material handling. It discusses material handling and different types of material handling equipment such as conveyors and automated guided vehicles (AGVs). It describes AGVs in detail, including their components, guidance technologies, and types. It provides an example of calculating the number of AGVs needed based on delivery rate, cycle time, and vehicle availability. The presentation also discusses using simulation to model AGV systems and limitations of automated material handling systems.
This document discusses different layout configurations for flexible manufacturing systems (FMS). It describes five types of FMS layouts: progressive or line type, loop type, ladder type, open field type, and robot centered type. For each type, it provides a brief explanation of the layout and flow of parts. It also lists some factors that influence the selection of an FMS layout, such as availability of materials and labor, transportation infrastructure, and local business conditions.
The document discusses shop floor control and flexible manufacturing systems (FMS). It describes the key components and functions of shop floor control including order release, scheduling, and progress phases. It also explains the components, types, layout configurations and applications of FMS, including automated workstations, material handling systems, computer control, and benefits like increased flexibility and productivity.
The proper implementation and role of flexible manufacturing system in current scenario. Better understanding of different types of flexible manufacturing system layouts and types of flexible manufacturing system.
Other than these, brief introduction of flexibility and types of flexibility in manufacturing and other industries.
Introduction, Conventional and Revised with CAD/CAM Product cycle, Application of computers to the design process, comparison of capabilities of designers and computers, Reasons for implementing CAD, Benefits of CAD, CAD workstation,
GROUP TECHNOLOGY IS A MANUFACTURING
TECHNIQUE AND PHILOSOPHY TO INCREASE PRODUCTION EFFICIENCY BY EXPLOITING THE “UNDERLYING SAMENESS” OF COMPONENT
SHAPE, DIMENSIONS, PROCESS ROUTE, ETC.
Automation in manufacturing five unit vtu, mechanical engineering notes pdf d...kiran555555
This document provides an overview of automation in manufacturing systems. It discusses production systems, facilities, manufacturing support systems, and the three categories of manufacturing systems: manual work systems, worker-machine systems, and automated systems. It then covers the four functions of manufacturing support: business functions, product design, manufacturing planning, and manufacturing control. Finally, it describes the three types of automated manufacturing systems: fixed automation, programmable automation, and flexible automation.
Review on GROUP TECHNOLOGY & it’s implementationManoj Gowda K
Manufacturing philosophy which advocates simplification and standardization of similar parts in order to reduce complexity in manufacturing.
GT is a manufacturing concept in which similar parts are grouped together in parts groups families.
Unit 5 -1-ME8691 & COMPUTER AIDED DESIGN AND MANUFACTURINGMohanumar S
Group technology is a manufacturing philosophy that increases production efficiency by grouping parts with similar design and manufacturing attributes into families. Parts within a family will be produced together in batches on the same machines to reduce setup times. Common coding systems are used to classify parts into families based on their attributes, which facilitates automated process planning and machine cell design in CAD/CAM systems. Production flow analysis is a method to identify part families and machine groupings based on similarities in their production routing sheets. The composite part concept provides a hypothetical part that embodies all attributes of a family and defines what machines are needed in a manufacturing cell to produce that family.
Computer-aided process planning (CAPP) is the application of computers to assist process planners in planning functions. CAPP integrates computer-aided design (CAD) and computer-aided manufacturing (CAM) by providing a direct connection between design and manufacturing. There are two main approaches to CAPP: variant process planning and generative process planning. Variant process planning retrieves and modifies standard process plans from a database, while generative process planning creates customized process plans using decision logic and part geometry data without predefined plans. CAPP provides benefits like increased productivity, consistency of plans, accuracy of plans, and reduced costs.
Computer-Aided process planning (CAPP) aims to capture the logic, judgements, and experience required for process planning and incorporate them into computer programs that can automatically generate manufacturing operation sequences. There are three main approaches to CAPP: retrieval systems that retrieve standardized process plans, generative systems that create plans through decision logic and algorithms, and hybrid systems that combine aspects of both. CAPP reduces routine work for manufacturing engineers and aims to standardize and optimize the process planning procedure.
The document discusses various computer-aided design (CAD) standards used for data exchange, including graphics standards like GKS and OpenGL, as well as data exchange standards like IGES, DXF, and STEP. It provides details on the purpose and requirements of each standard, explaining concepts like layers, entities, and file structure. The key standards discussed are IGES for shape data exchange, DXF for CAD file interchange, and STEP for comprehensive product data across the design and manufacturing lifecycle.
CIM is the architecture for integrating the engineering, marketing and manufacturing functions through information technologies. In the broad
sense, CIM involves the integration of all the business processes from supplier to end consumer.
Gears are important machine elements used for power transmission. There are several types of gears including spur, helical, bevel, rack and pinion, and worm gears. Gears can be manufactured using various processes such as machining, powder metallurgy, stamping, and extrusion. Powder metallurgy involves mixing metal powders, compacting them into gear shapes, sintering to improve strength and density, and optional secondary operations. Form milling is a machining process that uses disc or end mill cutters to cut gear teeth by plunging the rotating cutter into the gear blank.
This document provides an overview of flexible manufacturing systems (FMS). It defines FMS and discusses their typical components such as machining stations, material handling systems, and load/unload stations. The document outlines the objectives and advantages of FMS, including increased flexibility and responsiveness to changes. It also notes some potential disadvantages like high initial costs and complexity of implementation.
This document outlines the course objectives, outcomes, modules, and content for a Computer Aided Design and Manufacturing course. The key points are:
- The course aims to teach students about concepts of computer-integrated manufacturing systems including CAD, CAM, automation, and modern trends like additive manufacturing and Industry 4.0.
- The content covers topics like CAD software, geometric modeling, computer-aided process planning, CNC machine tools, and numerical problems involving geometric transformations.
- The course objectives are for students to understand CAD/CAM applications, automated manufacturing systems, computer applications in design and manufacturing, and modern manufacturing trends leading to smart factories.
This document discusses computer aided quality control (CAQC). It introduces CAQC and explains that it uses computers to inspect and test manufactured products to ensure they meet defined quality standards. The objectives of CAQC are listed as increasing inspection and production productivity, reducing lead times and waste. The main components of CAQC are computer aided inspection (CAI) and computer aided testing (CAT). CAI uses 3D scanning and CAD modeling to check part specifications, while CAT simulates stresses and other factors to test attributes like strength. The advantages of CAQC include data harvesting, allowing 100% inspection and testing, using non-contact sensors, and providing computerized feedback control.
Unit 5-CELLULAR MANUFACTURING AND FLEXIBLE MANUFACTURING SYSTEM (FMS) .pptxdinesh babu
This document discusses cellular manufacturing and flexible manufacturing systems (FMS). It covers topics like group technology, part families, coding systems, cellular manufacturing using composite part concepts, and types of flexibility in FMS. The key aspects are that group technology involves grouping parts with similar manufacturing attributes into families to improve efficiency. Cellular manufacturing aggregates dissimilar machines into cells dedicated to producing part families based on a hypothetical composite part for each family. FMS combines CNC machines and automated material handling to flexibly produce different part families.
This document discusses group technology and computer-aided process planning. It defines group technology as a manufacturing technique that groups similar parts together to take advantage of their common design and production needs. It describes methods for forming part families and coding systems. It also discusses two types of computer-aided process planning systems: retrieval systems that store and retrieve standard process plans, and generative systems that create process plans using logical procedures similar to human planners.
This document discusses cellular manufacturing and group technology. It describes group technology as organizing manufacturing by grouping parts with similar shapes, dimensions, or manufacturing processes. This justifies batch production and increases efficiency. Cellular manufacturing involves designing machine cells and layouts to group similar production processes together. The document discusses various part classification and coding methods used to analyze production flow and form part families based on design and manufacturing attributes. This includes visual inspection and coding schemes involving hierarchical, attribute, or decision tree codes.
UNIT -3-02225265555- CELLULA MANUFACTURING .pptdharma raja`
This document discusses group technology and cellular manufacturing. It defines group technology as a manufacturing philosophy that groups similar parts together based on their design and production similarities. Parts are classified into part families that have similar processing steps. Machines are then arranged into manufacturing cells specialized for certain part families. This reduces setup times, work in process, and improves other metrics. The document outlines various ways to identify part families including visual inspection and coding schemes. It provides details on the Opitz classification and coding system, which was one of the first published schemes using codes to convey part design and manufacturing attributes.
group technology-and-cellular-manufacturing-iAshok Mannava
Group technology (GT) is a manufacturing philosophy that groups similar parts into families to take advantage of their design and production similarities. Implementing GT involves identifying part families and rearranging production machines into cells specialized for each family. This reduces material handling, simplifies processes, and lowers manufacturing lead times. Key tasks are identifying part families using visual inspection, coding systems, or production flow analysis of process plans.
Group technology is a manufacturing strategy that involves grouping similar parts together and processing them in the same production cells using similar machines and tools. The key aspects are:
- Identifying part families based on similarities in geometry, manufacturing processes, etc.
- Organizing production facilities into manufacturing cells specialized for certain part families to reduce setup times and transportation.
- Implementing flexible manufacturing systems and just-in-time production to further improve efficiency.
- Classification and coding systems help systematically identify part similarities and differences to effectively group parts into families.
Lec2 GT.pptx. grouptechnology definition and applicationssuserac3f5b
this pesentation is an introductionto group technology GT where by parts are classified and arranged in groups ech group called a famly. the famly hld similar parts having same or similar features. the similarty in design feature or manufacuring process features. Group technology is a manufacturing philosophy in which similar parts are identified and grouped together to take advantage of their similarities in design and production.
Similar parts are arranged into part families, where each part family possesses similar design and/or manufacturing characteristics.
Cellular manufacturing. Organizing the production equipment into machine cells, where each cell specializes in the production of a part family.
What is a Part Family
A part family is a collection of parts that are similar either in geometric shape and size or in the processing steps required in their manufacture.
The parts within a family are different, but their similarities are enough for a part to be members of the part family.
The principal functional areas that would use a parts classification and coding system are design and manufacturing. Accordingly, parts classification and coding systems fall into one of three categories:
(1) systems based on part design attributes,
(2) systems based on part manufacturing attributes, and
(3) systems based on both design and manufacturing features.
there are three structures used in classification and coding schemes:
(1) Hierarchical structure (monocode) in which the interpretation of each successive symbol depends on the values of the preceding symbols
(2) Chain-type structure, (polycode) in which the interpretation of each symbol in the sequence is always the same; not dependent on the symbols, and
(3) Mixed-mode structure, a hybrid of (1) & (2) coding
The advantage of the hierarchical structure is that in general more information can be included in a code of a given number of digits.: E.g. code 15 and 25 the 5 have different meaning in Hierarchical structure where as have same meaning in Chain-type structure.
The number of digits in the code can range between 6 and 30.
If code include design and manufacturing data range 20 to 30
A number of parts classification and coding systems are described in the literature. Also a number of commercial packages were developed. Selection is company’s decision
Group technology is a manufacturing philosophy that identifies similar parts and groups them into part families based on their design and manufacturing attributes. Parts are classified into families based on their shape, size, processing steps, and other attributes. Coding systems are then used to uniquely identify each part family and their attributes to facilitate grouping the parts for production planning and machine grouping. The goal is to organize machines into cells dedicated to producing individual part families to take advantage of the similarities between the parts in design and manufacturing.
This document discusses group technology and part families. It defines group technology as identifying similar parts and grouping them into families based on their design and manufacturing characteristics. The two main tasks for implementing group technology are identifying part families and rearranging production machines into cells. There are three methods for determining part families: visual inspection, part coding systems, and production flow analysis. Part coding systems involve assigning codes to parts' design and manufacturing attributes to facilitate grouping similar parts.
This document discusses group technology, which is a manufacturing philosophy that groups similar parts into families to take advantage of their design and manufacturing similarities. It defines part families as collections of parts that are similar geometrically or in their production steps. The document outlines four methods to group parts into families: visual inspection, composite part analysis, production flow analysis, and parts classification/coding. It also lists advantages like reduced setup times and disadvantages like difficulty in grouping parts.
cellular manufacturing for production systemRAJESHS631800
This document outlines the objectives and syllabus for a course on smart manufacturing. The syllabus covers topics like group technology, part families, computer-aided process planning, cellular manufacturing, and flexible manufacturing systems. It provides details on various coding systems used to classify parts into families based on their design and manufacturing attributes in order to maximize production efficiencies. The use of composite parts to represent all attributes of a family for process planning is also discussed.
This document discusses cellular manufacturing. It begins by explaining that cellular manufacturing involves grouping similar products together based on their manufacturing requirements and producing them in dedicated manufacturing cells. Each cell contains the necessary machines and resources to produce a family of similar parts. The document then discusses the advantages of cellular manufacturing, such as reduced setup times, inventory, and material handling. It also notes potential disadvantages like issues balancing cell production volumes. The remainder of the document provides details on implementing cellular manufacturing, including identifying part families, designing cell layouts, and arranging machines within each cell for efficient production flow.
Group technology is a manufacturing philosophy that increases production efficiency by grouping similar components together and exploiting their common attributes. It involves classifying parts into families based on their design, manufacturing processes, and other attributes. This allows companies to standardize processes, tools, and plans across similar parts, reducing costs and setup times while improving quality, flexibility and throughput. Effective implementation of group technology affects many functions across an organization.
Computer control in process planning Unit 4 (ME CAD/CAM)Avt Shubhash
This document discusses considerations for implementing computer-aided process planning (CAPP) systems. It explains that the process planning function depends on the manufacturing system and different systems have different needs. When selecting a CAPP system, factors like the manufacturing system components, production volume or batch size, and number of product families must be taken into account. It provides examples of variant and generative CAPP systems like CAM-I CAPP, MIPLAN, and APPAS.
Group technology is a manufacturing technique and philosophy to increase production efficiency by making use of the “underlying sameness” of component shape, dimensions, process route,
Cim module 2 notes that I am a student who is the best option to get a job and it was the first one of the most popular and I will send the link 6 years ago when the same as well as the main reason 6666 to get a chance for your time I have been trying to reach you can do to get to the next day I do you have a lot to the next point of view and I will send the link email address the same as a whole lot of people 777 to 7 pm to be able to get the job description of the day and time again for your time to time and effort and I will send it to you in a way that the company has been the best of the day of the week and the way that
Computer integrated manufacturing (CIM) incorporates all manufacturing processes including CAD/CAM, business functions, and engineering functions. CIM aims to achieve lower costs, higher quality, and better responsiveness through techniques like group technology, flexible manufacturing systems, and shop floor control using concepts like CONWIP. Group technology groups similar parts into families to improve productivity. Flexible manufacturing systems are reprogrammable systems that can produce different product types automatically using components like machine tools and automated material handling.
Metrology Measurements and All units PPTdinesh babu
Metrology is the science of measurement, embracing both experimental and theoretical determinations at any level of uncertainty in any field of science and technology
Unit 4-FUNDAMENTAL OF CNC AND PART PROGRAMING.pptxdinesh babu
This document provides an overview of numerical control (NC) and computer numerical control (CNC) systems used to automate machine tools. It discusses the basic components and classifications of NC systems, including traditional NC, CNC, and distributed NC. The document also covers part programming fundamentals, including coordinate systems, preparatory functions, and canned cycles used in CNC part programs. Various CNC machine types and applications are described, along with advantages and disadvantages of NC and CNC automation.
Unit 3-ASSEMBLY OF PARTS AND CAD STANDARDS.pptxdinesh babu
This document discusses CAD standards and assembly modeling. It covers three main approaches to assembly modeling: top-down, bottom-up, and combination. It also describes common mating conditions for assembly such as coincident, coplanar, concentric, and tangent. The purpose of CAD standards for data exchange between systems is explained. Common data exchange formats like IGES and STEP are introduced along with organizational structures to support graphics standards.
Unit 2 discusses geometric modeling techniques. It covers representation of curves using Hermite, Bezier, and B-spline curves. It also discusses surface modeling techniques including surface patches, Coons and bicubic patches, and Bezier and B-spline surfaces. Solid modeling techniques of CSG (Constructive Solid Geometry) and B-rep (Boundary Representation) are also introduced.
This document provides an introduction and syllabus for a CAD/CAM course. It discusses key topics that will be covered including the product design cycle, design processes, sequential and concurrent engineering, computer aided design systems and graphics, coordinate systems, geometric transformations, line drawing algorithms, clipping, and viewing transformations. The goals of the course are to introduce students to CAD and CAM concepts and systems as well as manufacturing planning and control.
UNIT-5FIRE SAFETY AND INSTALLATION.pptxdinesh babu
This document discusses fire safety systems and gas installation components. It covers topics like fire alarms, electrical alarm circuits for fire detection, smoke extraction and ventilation. It also mentions fire prevention through gas extinguishers and different types of fire detectors used in detection and control systems.
This document discusses heat emitters and recuperators used in refrigeration and air conditioning systems. It describes different types of heat emitters like radiators, warm air heaters, and underfloor heaters. It then explains recuperators and regenerators, which are heat recovery devices that transfer heat between exhaust gases and intake air using principles of radiation, convection, or both. Recuperators use metallic or ceramic materials, while regenerators are suited for high temperatures but have higher costs. Regenerative burners also recover waste heat from furnace exhaust to preheat combustion air.
This document discusses different types of hot water cylinders, including direct and indirect cylinders. Direct cylinders heat water internally with immersion heaters, while indirect cylinders rely on an external heat source like a boiler to heat water via a coil. Vented cylinders use gravity to distribute heated water from a storage tank in the loft, while unvented cylinders use mains water pressure without a storage tank. Both have pros and cons related to installation, maintenance, and performance.
This document discusses general electrical systems in buildings. It covers basics like earthing systems, wiring, industrial installations, lighting controls, light sources and lamps. It describes how an electrical system carries and distributes power safely from the point of delivery to various loads. Basic installations include lighting, exhaust fans, portable appliances and their wiring network. It also discusses fire safety systems, energy efficiency standards, and methods of wiring like joint box and loop-in systems. The document outlines types of lighting controls and different lighting designs. It concludes with an overview of telecommunication installation media like twisted pair, coaxial cable, fiber optics and various wireless transmission methods.
The document discusses different types of machinery used in tool rooms including hydraulic lifts, travelators, and elevator control systems. It describes how hydraulic lifts use pistons and hydraulic oil to lift cabins at speeds up to 200 feet per minute. Travelators are used commercially to increase customer flow and density. Elevator control systems aim to bring lifts to the correct floor safely and comfortably using inputs like sensors, buttons, and key controls and outputs that accelerate, decelerate, and travel at safe speeds. The document provides details on single automatic, selective collective, and group automatic elevator operation types.
This document outlines a 16-step design procedure for spur gears, helical gears, bevel gears, and worm gears. The procedure includes steps to select materials, calculate life, initial torque, stresses, center distance, tooth numbers, module, dimensions, efficiency, and check designs for bending strength, wear strength, and other factors using equations from referenced handbooks.
The document discusses different types of belt drives used to transfer rotational motion between two shafts. It describes four common types of belts - flat belts, round belts, V-belts, and timing belts. It also discusses different belt drive arrangements including open, crossed, compound drives. Key points covered include the characteristics and applications of each belt type as well as formulas for calculating belt drive power and tension.
Belts are loops of flexible material used to mechanically link rotating shafts and transmit power between them. They work by looping over pulleys on two shafts, and can drive the pulleys in the same or opposite directions. Belts are a simple, economical way to transmit power between shafts without requiring parallel alignment and provide protection against overloads and shocks.
This document discusses different types of vehicle transmission systems. It describes 10 types of clutches including friction, centrifugal, hydraulic, and electromagnetic clutches. It also discusses manual and automatic gearboxes, including sliding mesh, constant mesh, and synchromesh gearboxes. Additionally, it covers propeller shafts, universal joints, differentials, rear axle drives including hotchkiss drive and torque tube drive, and their purposes in transmitting power from the engine to the driving wheels.
The document discusses various auxiliary systems used in engines, including carburetors, fuel injection systems, ignition systems, and emission control systems. It provides details on how carburetors work to mix fuel and air, and the limitations of carburetors that led to the development of fuel injection systems. It then describes different types of fuel injection and ignition systems, and emission control technologies like catalytic converters, EGR, and evaporative emission control systems used to reduce pollutants from engine exhaust.
This document discusses different types of automobiles classified based on purpose, weight, fuel used, capacity, number of wheels, and driver seat location. It describes the key parts of a bullock cart including the frame, wheels/axle, yoke, body/superstructure, and how they are divided. Vehicle chassis are classified based on engine fitting location and number/driving wheels. Desirable chassis characteristics and components such as the frame, suspension, steering, braking, engine, and drivetrain are outlined. Finally, the aerodynamic forces acting on vehicles and their causes including drag, lift, and crosswinds are summarized.
Alternative fuels like ethanol, methanol, natural gas, and biodiesel are being developed and used to reduce dependence on imported petroleum and improve the environment. These fuels have benefits like lower emissions and being produced from domestic renewable resources, but also have drawbacks like higher vehicle costs and potentially lower range. Natural gas and LPG have properties making them suitable as vehicle fuels like being stored as liquids under pressure and having low emissions, but they have less energy density than gasoline. Ethanol and biodiesel are attractive because they can be produced domestically from crops and waste.
The document discusses steering geometry components like caster, camber, kingpin inclination and toe-in. It states that camber should not exceed 2 degrees, caster ranges from 2 to 7 degrees in modern vehicles, kingpin inclination varies from 3.5 to 7.5 degrees, and toe-in does not exceed 3mm. It also briefly describes recirculating ball steering gear boxes, rack and pinion steering gear boxes, power steering and the purpose and function of the front axle in an automobile.
The document discusses various advances in metrology, including laser interferometers, coordinate measuring machines (CMMs), and machine vision systems.
Laser interferometers use laser light sources to perform highly precise linear and angular measurements. CMMs use probes to determine the coordinates of points on an object's surface and digitally map out its geometry. Machine vision systems use cameras and image processing to automatically inspect parts and make quality checks. Together, these metrology tools enable automated, high-precision measurement and inspection critical for modern manufacturing.
The document discusses various form measurement principles and methods including thread measurement, gear measurement, straightness measurement, flatness measurement, and surface finish measurement. It provides details on measuring various elements of threads such as major diameter, minor diameter, pitch diameter, and pitch using methods like thread gauges, thread measuring machines, and micrometers. Measurement of gears is also summarized, including terminology, common errors in gears, and using devices like the involute measuring machine and Parkinson gear tester. Straightness and flatness measurement methods like spirit levels, straight edges, and laser systems are also outlined.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
International Conference on NLP, Artificial Intelligence, Machine Learning an...gerogepatton
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...University of Maribor
Slides from talk presenting:
Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
Presentation at IcETRAN 2024 session:
"Inter-Society Networking Panel GRSS/MTT-S/CIS
Panel Session: Promoting Connection and Cooperation"
IEEE Slovenia GRSS
IEEE Serbia and Montenegro MTT-S
IEEE Slovenia CIS
11TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC AND COMPUTING ENGINEERING
3-6 June 2024, Niš, Serbia
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
Low power architecture of logic gates using adiabatic techniquesnooriasukmaningtyas
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMSIJNSA Journal
The smart irrigation system represents an innovative approach to optimize water usage in agricultural and landscaping practices. The integration of cutting-edge technologies, including sensors, actuators, and data analysis, empowers this system to provide accurate monitoring and control of irrigation processes by leveraging real-time environmental conditions. The main objective of a smart irrigation system is to optimize water efficiency, minimize expenses, and foster the adoption of sustainable water management methods. This paper conducts a systematic risk assessment by exploring the key components/assets and their functionalities in the smart irrigation system. The crucial role of sensors in gathering data on soil moisture, weather patterns, and plant well-being is emphasized in this system. These sensors enable intelligent decision-making in irrigation scheduling and water distribution, leading to enhanced water efficiency and sustainable water management practices. Actuators enable automated control of irrigation devices, ensuring precise and targeted water delivery to plants. Additionally, the paper addresses the potential threat and vulnerabilities associated with smart irrigation systems. It discusses limitations of the system, such as power constraints and computational capabilities, and calculates the potential security risks. The paper suggests possible risk treatment methods for effective secure system operation. In conclusion, the paper emphasizes the significant benefits of implementing smart irrigation systems, including improved water conservation, increased crop yield, and reduced environmental impact. Additionally, based on the security analysis conducted, the paper recommends the implementation of countermeasures and security approaches to address vulnerabilities and ensure the integrity and reliability of the system. By incorporating these measures, smart irrigation technology can revolutionize water management practices in agriculture, promoting sustainability, resource efficiency, and safeguarding against potential security threats.
A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMS
Unit 3 cim
1. UNIT 3
CELLULAR MANUFACTURING
Group Technology(GT), Part Families – Parts Classification and
coding – Simple Problems in Opitz Part Coding system –
Production flow Analysis – Cellular Manufacturing – Composite
part concept – Machine cell design and layout – Quantitative
analysis in Cellular Manufacturing – Rank Order Clustering Method
- Arranging Machines in a GT cell – Hollier Method – Simple
Problems.
2. GROUP TECHNOLOGY
❧It’s the manufacturing philosophy to increase the
production efficiency by grouping a variety of parts
having similarities of shape, dimension, and/or
process route.
❧It justifies batch production by capitalizing on design
and/or manufacturing similarities among
components parts.
3. Role of GT in
CAD/CAM
❧ For closer dimensional tolerances
❧ More economical in higher accuracy
❧ Increased variety of materials , by manufacturing needs.
❧ Lowering scrap rates
4. Important Elements of
CAD/CAM Integration
❧ It provides a common data base for effective integration of
CAD & CAM for successful implementation of CIM
❧ GT provides a common language for users
❧ It gives a information about Design, Manufacturing
Attributes, Processes & Capabilities
5. Part Families
❧ A part family is a collection of parts which are similar in
geometric shape and size or processing steps are required in
their manufacture.
❧ It may be a similar in their Design, Manufacturing
characteristics are grouped and referred as Design part
family & Manufacturing part family
❧ The characteristics used are known as Attributes
12. 2. Part classification &
Coding Methods
❧ Coding is systematic process by establishing an alpha-
numeric value for parts based on selected part features.
❧ Classification is the grouping of parts based on code values.
❧ Here parts are identified , listed and assigned as per the code
numbers both in Designing & Manufacturing.
13. Design & Manufacturing
Attributes
1.System based on Part Design Attributes
2.System based on Manufacturing Attributes
3.System based on Both Design & Manufacturing
Attributes
14. Coding System
Structure
❧A Group Technology is a string of
characteristics capturing information's about
an item.
❧A part coding scheme consists of a sequence
of symbols that identify the part’s Design /
Manufacturing attributes
15. Types of Basic Code
Structures
❧1. Hierarchical codes
(Mono codes or tree structure)
❧2. Attributes codes
(Poly code or chain type structure)
❧3. Decision tree codes
(hybrid code or mixed codes)
16. Hierarchical codes
❧The interpretation of each successive symbols
depends on the value of the preceding symbols
❧Each symbols amplifies the information contained in
the preceding digit, so that the digits in the symbols
cannot be interrupt alone.
❧The structure is like a tree.
17.
18.
19. Attribute Code
❧The interpretation of each symbols in the
sequence does not depend on the value of
preceding symbols.
❧Here each digit in this code represents
information in its own right and does not
directly qualify the information provided by
the other digits.
20.
21. Decision-Tree Code
❧A hybrid code captures the best features of the
hierarchical & poly code Structures.
❧This system is also known as decision-tree coding
❧In this both the attributes are combined.
❧This is the mostly commonly used coding systems
with combined hybrid constructions.
22.
23. Reason for using
Coding Scheme
❧ Design Retrievals
❧ Automated Process Planning
❧ Machine Cell Design
24. Coding Systems
Through more than 100 coding systems are available, the
following coding systems are widely recognized in industries:
25. Opitz Classification Systems
❧ The opitz system was developed by H.Optiz of the university of
Aachen in Germany.
❧ It was the most popular and one of the first published
classification and coding scheme for mechanical parts
❧ This system uses alpha numeric symbols to represent the various
attributes of a part.
❧ The following digits sequence are:
26. ❧ FORM CODE (12345) :This code is for
design attributes
❧ SUPPLEMENTARY CODE (6789): This
code is for Manufacturing related attributes
❧ SECONDARY CODE (ABCD): This code is
for production operation and sequence.
27.
28.
29.
30.
31.
32.
33. The MICLASS System
MICLASS stands for Metal Institute Classification System.
This system was developed by Netherlands organization for
Applied Scientific research.
MICLASS system is also referred as Multiclass system.
The MICLASS classification number can range from 12 to 30
digits. The first 12 digits are universal codes that can be
applied to any part. The next 18 digits are called
supplementary digits.
34.
35. DCLASS Coding System
DCLASS stands for Design and Classification Information
system. It was developed at Brigham young university.
The DCLASS part family code is comprised of eight digits
partitioned into five code segments, as shown in figure.
36. The KK-3 system
The KK-3 system is a general purpose classification and
coding system for parts that are to be machined or ground.
It is developed by the Japan Society for the Promotion of
Machine Industry in the late 1970s.
It uses a 21 digit decimal system. The structure of a KK-3
system for rotational components is shown in figure
37.
38. The CODE system
The CODE system was developed by manufacturing data
system.
The code number has eight digits. For each digit there are 16
possible values (0 to 9 and A to F) which are used to describe
the parts design and manufacturing characteristics.
39. It is the method for identifying part families and associated
machine groupings that uses the information contained on
production route sheets rather on part drawings.
In PFA, work parts with identical or similar routing are
classified into part families.
PRODUCTION FLOW
ANALYSIS
41. Data Collection
The step in the PFA procedure is to collect the necessary data.
The route sheets of all components to be manufactured in the
shop are prepared. The route sheet should contain the part
number and operation sequence.
42. Sorting of process routings
The second step in the PFA is to arrange the parts into groups
according to the similarity of their process routings.
A typical card format is required for organising the data such
as the part number, sequence of code, and lot size.
53. Cellular Manufacturing
Cellular Manufacturing (CM) is an application of group
technology in which dissimilar machines have been
aggregated into cells, each of which is dedicated to the
production of a part family.
54.
55.
56. A composite part is the hypothetical part which includes all of the
design and manufacturing attributes of a family.
The composite is a single hypothetical part that can be completely
processed in a manufacturing cell.
If a new part is loaded in a machine group and if the degree of
dis-similarity of the part from the hypothetical composite part is
minimum, then the new part can be processed in the same
manufacturing cell.
Composite Part Concept
57.
58.
59. It simplifies the identification of groups
It provides a basis for the design of group tooling.
It helps to develop the optimized process plan for the parts
Uses of composite concept
60. Machine cell design
The important aspect of cellular manufacturing is the design
of the machine cell, because the cell design influences
significantly the performance of the cell.
61. Types of Machine cells and
Layouts
Based on the number of machines used and the degree of
mechanisation of material handling involved, the manufacturing cells
can be classified into the following four categories.
Single machine cell
Group machine cells with manual handling
Group machine cell with semi integrated handling
Flexible manufacturing cell or flexible manufacturing system
62. Single machine cell
The single machine cell consists of one machine with
supporting fixtures and tooling organized to produce one or
more part families.
63.
64. Group machine cells with manual
handling
A group machine cell with material handling is an
arrangement of more than one machine employed to produce
one or more part families.
The human operator performs the material handling.
65.
66. Group machine cell with semi
integrated handling
A mechanised handling system is used in group machine cell
with semi-integrated handling.
In this type of cell design, mechanised conveyors are
generally used to move components between machines.
For a group machine with semi integrated handling, any of
the following three machine layouts can be used
In line layout
Loop layout
Rectangular layout
67.
68.
69.
70. Flexible manufacturing cell or
flexible manufacturing system
FMS employs a fully integrated handling system with
automated processing stations.
Out of all four types of machine cells, the FMS is the highly
automated GT machine cell.
75. Factors Influencing Cell Layout
The various factors to be considered during the cell design
includes
Production rate
Number of parts/year
Processing time/part at each station
Type of part
Part Size, Shape and Weight
Routing of the parts.
76. Key Machine Concept
In a GT machine cell, a certain machine is referred as the key
machine or bottleneck machine:
i) when that machine is more expensive to operate than the
other machines in the cell
ii) when that machine performs certain critical operations in the
shop floor.
The other machines (expect Key machine) in the cell are
referred to as supporting machines.
77.
78. Quantitative Analysis in Cellular
Manufacturing
The various quantitative techniques that are developed for
cellular manufacturing system address the following two
problem areas:
Grouping parts and machines into families
Arranging machines in a GT cell
79. Grouping parts and machines
into families
The basic objectives are
Identification of part families
Identification of machine cells
80.
81. Rank Order Clustering (ROC)
Algorithm
It is also known as Binary Ordering Algorithm (BOA).
Input: Part-Machine incidence matrix.
83. Steps in ROC Algorithm
Step 0: Input: Total number of parts, part routing (Part sequences)
Step 1 : i) For each row, assign binary weights and calculate decimal
equivalents.
ii) Rank the rows in order of decreasing value. That is, the rows with the
highest decimal equivalent is considered to have the highest rank 1 among
the rows and so on.
Step 2: Numbering from top to bottom, check whether the current order
of rows is the same as the rank order obtained in the previous step? If not,
go to step 3 ; if yes, go to step 7.
Step 3: Rearrange the rows of the matrix rank wise (High to Low from
top to bottom)
84. Step 4 : for each column, assign binary weights and calculate
decimal equivalents.
Rank the columns in order to decreasing value. That is, the
column with the highest decimal equivalent is considered to
have the highest rank among the columns and so on.
Step 5 : Numbering from left to right. Check whether the
current order of columns is the same as the rank order
obtained in the previous step? If not, go to the step 6; If yes,
go to step 7.
Step 6: Rearrange the columns of the matrix rank wise
Step 7: The final part machine incidence matrix. Stop and
print
85. Example: Apply Rank ordering clustering technique to the part-machine
incidence matrix shown in Table to arrange parts and machines into groups.
Table: Initial part machine incidence matrix
86.
87.
88.
89.
90.
91.
92.
93.
94.
95.
96.
97. Arranging Machines in a GT Cell
After part-machine groupings have been identified (By Rank
Order Clustering Algorithm), the next problem is to arrange
the machines into the most logical sequence.
Having identified machine cells already, the next issues in the
design of cellular manufacturing system are:
The determination of the most logical machine sequence in each cell
The development of a feasible layout plan for each cell
98. Hollier Method
Hollier method 1 requires many iterations to obtain the
machine sequence.
Hollier method 2 provides the most logical machine sequence
in a GT cell in a single iteration.
99. Hollier method 2 Procedure
Step 1 : Develop the from To Chart from part routing data
Step 2 : Calculate the “From/To ratio” for each machine
Step 3 : Arrange Machines in a GT Cell in order of decreasing
“From/To ratio”
100. Step 1 : Develop the from To
Chart from part routing data
The From To chart provides information concerning the
number of part moves between the machines/workstations in
the cell.
The From To chart is usually developed from the part routing
data.
It should be noted that the part moves into and out of the cell
are not included in the From To chart.
101. Step 2 : Calculate the “From/To
ratio” for each machine
Firstly, determine the “From” sum and “To” sum for each
machine.
Now, calculate the “From/To ratio” for each machine by
dividing the “From” sum for each machine by the respective
“To” sum.
102. Step 3 : Arrange Machines in a
GT Cell in order of decreasing
“From/To ratio”
Arrange machines in order of decreasing “From/To ratio”.
Machines are arranged in the order given below:
Machines with high “From/To ratio” are placed at the
beginning of the work flow.
Machines with low “From/To ratio” are placed at the end of the
work flow.
Tie breaker: If a tie occurs, the machine with the higher “From”
sum is placed first.
103. Performance Measures for
Machine Sequences in a GT Cell
Percentage of In sequence moves
Percentage of Bypassing moves
Percentage of Backtracking moves