Welding is a fabrication technique that joins materials together by heating them to suitable temperatures using various heat sources like electric arcs or gas flames. There are different types of welding processes categorized by the heat source and filler material used, such as arc welding, gas welding, resistance welding, and solid state welding. The document focuses on three main arc welding processes: shielded metal arc welding uses a consumable electrode covered in flux; gas metal arc welding uses a continuously fed wire electrode and shielding gas; and gas tungsten arc welding uses a non-consumable tungsten electrode and separate shielding gas and filler material. Each process is illustrated and their characteristics are compared. Common welding defects are also briefly discussed.
this ppt pdf beneficial for 1st year engineering student who studying workshop technology. in this pdf types of joining, gas welding, arc welding, spot welding, tig welding, mig welding, soldering brazing and different welding defect has been discussed.
Welding process
Arc Welding
Resistance Welding
Oxy fuel Gas Welding
Other Fusion Welding Processes
Solid State Welding
Weld Quality
Weld ability
Design Considerations in Welding
Demand of welding increase of new materials.
-- ceramics and metal matrix composites.
-- High strength low-alloy (HSLA) steels
Lack of skilled labours
Traditional welding techniques are costly
Safety concerns.
Need to improve the total cost effectiveness of the welding
Lalit Yadav
this ppt pdf beneficial for 1st year engineering student who studying workshop technology. in this pdf types of joining, gas welding, arc welding, spot welding, tig welding, mig welding, soldering brazing and different welding defect has been discussed.
Welding process
Arc Welding
Resistance Welding
Oxy fuel Gas Welding
Other Fusion Welding Processes
Solid State Welding
Weld Quality
Weld ability
Design Considerations in Welding
Demand of welding increase of new materials.
-- ceramics and metal matrix composites.
-- High strength low-alloy (HSLA) steels
Lack of skilled labours
Traditional welding techniques are costly
Safety concerns.
Need to improve the total cost effectiveness of the welding
Lalit Yadav
What is MIG welding?
Working process
Process Parameters
Advantages
Limitations
Applications
MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool, joining the two base materials together.
A shielding gas is also sent through the welding gun and protects the weld pool from contamination.
In fact, MIG stands for “Metal Inert Gas”. The technical name for it is "Gas Metal Arc Welding" (or GMAW).
Forging is the operation where the metal is heated and then a force is applied to manipulates the metals in such a way that the required final shape is obtained.
What is MIG welding?
Working process
Process Parameters
Advantages
Limitations
Applications
MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool, joining the two base materials together.
A shielding gas is also sent through the welding gun and protects the weld pool from contamination.
In fact, MIG stands for “Metal Inert Gas”. The technical name for it is "Gas Metal Arc Welding" (or GMAW).
Forging is the operation where the metal is heated and then a force is applied to manipulates the metals in such a way that the required final shape is obtained.
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If you are completely new to the world of welding, it can be defined as a method of joining and melting together two or more pieces of metal or other materials such as thermoplastics through the use of applied heat and pressure. cemetalfabrication.com
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Electron beam welding (EBW) is a fusion welding process in which a beam of high velocity electrons is directed to the materials being joined.The workpieces melts as the kinetic energy of the lectrons is transformed
into heat upon impact.
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A simple slideshow of common welding process, welding terminology, welding symbols / joint configurations, welder related operations, and welding safety.
Arc welding is type of welding in Manufacturing Processes. Brief Introduction about Arc welding and types of arc welding and their introduction. There are many types of Arc welding available in the market.
It is a type of welding that uses a welding power supply to create an electric arc between an metal stick and the base material to melt the metals at the point-of-contact
Manufacturing technology I ME 8351 joining process DrPETERPRAKASH
This is very much useful for engineering students, Teachers and industrialist. Adequate knowledge of the concept and principles of welding and welding process used in various industries.
One of the welding processes that used in Engineering field is the TIG welding. There are several types of welding processes similar to this, but tig welding has its unique features.
Thanks for the colleagues who give this slides to publish.
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Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
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harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
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2. Contents
• Welding Definition
• Types of Welding Processes
• Types of Major Welding Joints
• Arc Welding
• Shielded Metal Arc Welding
• Gas Metal Arc Welding
• Gas Tungsten Arc Welding
4. Welding
• Welding is a fabrication technique that involves joining materials together
by heating them to suitable temperatures, by applying heat with or
without the use of pressure.
• Heating is generated through various sources; electric arc, gas flame, laser,
electron beam, friction, current resistance & ultrasound.
• Apart from the materials to be welded, an additional “filler” material may
be used for welding. The filler material is added to the weld joint.
• Welding is used to produce permanent joints unlike bolting and riveting.
• Certain literature refer to soldering and brazing as sub-types of welding.
5. Types of Welding
Arc Welding
Shielded
Metal Arc
Welding
Gas Metal
Arc Welding
Gas Tungsten
Arc Welding
Gas Welding
Oxyacetylene
Welding
Resistance
Welding
Resistance
Spot Welding
Resistance
Seam
Welding
Energy Beam
Welding
Electron
Beam
Welding
Laser Beam
Welding
Solid State
Welding
Ultrasonic
Welding
Friction
Welding
8. Arc Welding Process
• In arc welding, a welding power supply is used to create an arc between
the base metals (metals to be welded) and electrode.
• Heat is generated in the base metals causing them to melt and fuse
together. The electrode can either be consumable or non-consumable.
• Filler material may or may not be added to enhance weld quality and
protect the welding area from external contamination.
• Following are typical arc welding processes:
– Shielded Metal Arc Welding (SMAW)
– Gas Metal Arc Welding (GMAW)
– Gas Tungsten Arc Welding (GTAW)
9. Shielded Metal Arc Welding (SMAW)
• This process uses a consumable electrode which serves as the filler
material as well.
• The electrode is covered with a “flux” that gives off vapors to shield
the welding area. The core of the electrode melts into the welding
area and provides the necessary filler material.
• SMAW is the most common and easiest to employ welding
technique and is suitable for welding ferrous materials.
• Welding electrodes are composed of material compatible with the
material(s) being welded.
11. Gas Metal Arc Welding (GMAW)
• GMAW employs a continuously fed wire that serves both as the
electrode and filler material. Shielding gas is flowed around the wire
to protect from weld site contamination.
• Unlike SMAW, this process is relatively faster since the electrode is
fed continuously to the welding area along with inert gas. NO TIME
IS WASTED IN REPLACING A CONSUMED ELECTRODE !
• Though GMAW is faster, the separate supply of shielding gas and
continuous feeding of wire requires bulky mechanisms. This
reduces the ease of use.
• GMAW is also referred to as Metal Inert Gas (MIG) Welding.
13. Gas Tungsten Arc Welding (GTAW)
• A non-consumable tungsten metal electrode is used in this process.
The shielding gas and filler material are fed separately into the weld
along side the electrode.
• GTAW is characterized by high and uniform weld quality however it
requires considerable welding operator skill.
• GTAW is used to weld thin section of stainless steel and light metals
such as aluminum.
• GTAW is also know as Tungsten Inert Gas (TIG) Welding.
15. Welding Defects
• Lack of Fusion: Arises due to little heat input or too rapid motion of the
welding electrode.
• Cracking: Occurs due to rapid thermal shrinkage as the welded joint cools
down. Can be avoided by controlled cooling/heating of the weld.
• Excess Penetration: It occurs either due to excessive heat input or too slow
motion of the welding electrode. Avoiding it requires a delicate balance
between operator speed and welding heat.
• Porosity: Arises due to air trapped in the solidified weld metal.
• Inclusions: Occurs due to inclusion of slag from various sources such as the
flux coating of welding electrode.