The document discusses various casting defects that can occur during sand casting including gas defects, shrinkage cavities, molding material defects, pouring metal defects, and mold shift. Gas defects like blowholes and porosity are caused by entrapped gases in the molten metal or gases released from the mold during pouring. Shrinkage cavities result from liquid shrinkage during solidification which can be prevented with proper feeding and risers. Pouring metal defects include mis-runs from insufficient metal flow and cold shuts where two streams of molten metal do not fuse together properly.
One of the welding processes that used in Engineering field is the brazing. Soldering is similar to the brazing but there are several differences.
Thanks for the colleagues who give this slides to publish.
powder metallurgy and micromachining notesDenny John
Powder Metallurgy: Need of P/M - Powder Production methods:- Atomization,
electrolysıs, Reduction of oxides, Carbonyls (Process parameters, characteristics of
powder produced in each method) – Powder characteristics: properties of fine powder,
size, size distribution, shape, compressibility, purity etc.- Mixing – Compaction:-
techniques, pressure distribution, HIP & CIP, – Mechanism of sintering, driving force,
solid and liquid phase sintering - Impregnation and Infiltration Advantages,
disadvantages and specific applications of P/M.
Micromachining: Diamond turn mechanism, material removal mechanismMagnetorheological
nano-finishing process: - polishing fluid, characteristics of MRP
fluid, MRF and MRAFF process.
One of the welding processes that used in Engineering field is the brazing. Soldering is similar to the brazing but there are several differences.
Thanks for the colleagues who give this slides to publish.
powder metallurgy and micromachining notesDenny John
Powder Metallurgy: Need of P/M - Powder Production methods:- Atomization,
electrolysıs, Reduction of oxides, Carbonyls (Process parameters, characteristics of
powder produced in each method) – Powder characteristics: properties of fine powder,
size, size distribution, shape, compressibility, purity etc.- Mixing – Compaction:-
techniques, pressure distribution, HIP & CIP, – Mechanism of sintering, driving force,
solid and liquid phase sintering - Impregnation and Infiltration Advantages,
disadvantages and specific applications of P/M.
Micromachining: Diamond turn mechanism, material removal mechanismMagnetorheological
nano-finishing process: - polishing fluid, characteristics of MRP
fluid, MRF and MRAFF process.
This Presentation covers the basic concepts of Hot cracks and cold cracks in welding. For more information, please refer the books mentioned in the references slide.... Thank you
Lost Foam Casting defects are influential and complex, and cross each other.
The quality of raw and auxiliary materials is very important, in that case the procurement of material has to be very careful.
Fine process management and convergence, to strengthen the fine control of the process.
Responsibility is more important than the system, to strengthen discipline and supervision, assign responsibility to every staff.
Improve the theoretical quality of workers and good operating habits.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
2. CASTING DEFECTS
The following are the major defects, which are likely
to occur in sand castings
1. Gas defects
2. Shrinkage cavities
3. Molding material defects
4. Pouring metal defects
5. Mold shift
3. GAS DEFECTS
Trapping of gas in the molten metal or by mold
gases evolved during the pouring of the casting
Blowholes, Porosity, Pinholes
Blowholes are spherical or elongated cavities
present in the casting on the surface or inside the
casting
Pinhole, porosity occurs due to the dissolution of
hydrogen gas, which gets entrapped during heating
of molten metal.
4. CAUSES OF GAS DEFECTS
The lower gas-passing tendency of the mold, which
may be due to lower venting, lower permeability of
the mold or improper design of the casting
The lower permeability is caused by finer grain size
of the sand, high percentage of clay in mold
mixture, and excessive moisture present in the
mold.
Metal contains gas
Mold is too hot
Poor mold burnout
5. SHRINKAGE CAVITIES
caused by liquid shrinkage occurring during the
solidification of the casting.
To compensate proper feeding of liquid metal is
required & risers are placed at the appropriate
places in the mold.
Sprues may be too thin, too long or not attached in
the proper location, causing shrinkage cavities.
It is recommended to use thick sprues to avoid
shrinkage cavities
6. METAL PENETRATION
molten metal enters into the gaps between sand
grains.
rough casting surface.
the sand is coarse or no mold wash was applied on
the surface of the mold.
The coarser the sand grains more the metal
penetration.
7. FUSION
Fusion of the sand grains with the molten metal.
Brittle, glassy appearance on the casting surface.
Clay or the sand particles are of lower
refractoriness or that the pouring temperature is too
high.
8. Swell
• metallostatic forces, move the mold wall back
causing a swell in the dimension of the casting.
•A proper ramming of the mold will correct this
defect.
Inclusions
•Particles of slag, refractory materials, sand or
deoxidation products are trapped in the casting
during pouring &solidification.
•The provision of choke in the gating system and the
pouring basin at the top of the mold can prevent this
defect.
10. MIS-RUNS
when the metal is unable to fill the mold cavity
completely and thus leaves unfilled cavities.
A mis-run results when the metal is too cold to flow
to the extremities of the mold cavity before freezing.
Long, thin sections are subject to this defect and
should be avoided in casting design.
11. COLD SHUT
When two streams of molten metal while meeting in the
mold cavity, do not fuse together properly thus forming a
discontinuity in the casting.
When the molten metal is poured into the mold cavity
through more-than-one gate, multiple liquid fronts will
have to flow together and become one solid.
If the flowing metal fronts are too cool, they may not flow
together, but will leave a seam in the part.
Such a seam is called a cold shut, and can be
prevented by assuring sufficient superheat in the poured
metal and thick enough walls in the casting design.
12. MOLD SHIFT
The mold shift defect occurs when cope and drag
or molding boxes have not been properly aligned