Mig welding process is semi automatic when used for manual welding. Tig welding is a manual welding process that requires the welder to use two hands to weld. Mig and tig welding are both types of arc welding that use inert gas. Tig welding tig welding gas tungsten arc welding gtaw is frequently referred to as tig welding. They cover smaw or stick welding, gtaw or tig welding, and gmaw or mig welding. The electrode used in the machine shop is copper wire and is in the form of continuous filler metal. Tig welding is one of the most common welding processes. Welding is the joining of metals at a molecular level. Tig welding gtaw or tig welding uses a nonconsumable tungsten electrode, shield gas and filler rod that is fed by hand. Welding is initiated by an electric arc between a tungsten electrode and the metal to be joined.
The arc area is shrouded in an inert or reducing gas shield to protect the weld pool and the tungsten electrode. Tig welding allows the operator greater control over mig welding. Tig welding needs highly skilled workers to produce high quality weld. Gas shielded arc welding processes tigmigmag openlearn. In tig welding an arc is formed between a nonconsumable tungsten electrode and the metal being welded. In some cases, such as when welding high nickel content metals, a helium and argon mixture is used. Optimization of mig welding process parameters for improving. The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas argon or helium, and a filler metal is normally used, though some welds, known as autogenous welds, do. The piece of metal to be joined are heated to plastic.
Nov 20, 2015 principles of mig welding technology ppt 1. Carbon dioxide is one of the most commonly used reactive gas used in mig welding as it can be used in its. My presentation topic tungsten inert gastig metal inert gas. Types of welding gaseswhat gas is used for mig welding.
With semiautomatic mig welding, the electrode wire is fed through a welding gun controlled by the operator. Used properly, personnel protective equipment ppe greatly reduces the risk of injury and minimizes the effects of toxins. Tig welding is a commonly used high quality welding process. The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas argon or helium, and a filler metal is normally. Jared mccombs and vinnie diblasi overview mig metal inert gas welding an arc is struck between an electrode and the sheet metal to be welded. And in most cases, only the percentages differ based on the material to be welded. Tig welding almost always uses 100 percent argon gas to shield the weld puddle. What is the difference between tig and mig welding.
Arc welding is the process of welding metals using heat generated by electricity. Ppt mig welding powerpoint presentation free to view. If you do not wear approved ppe, you will not be allowed in the lab. Tungsten inert gas, tig and metal inert gas, mig are two types of arc welding services which use inert gas and metal electrodes as the shielding from oxidations during very high temperatures. Presentations and quizzes welding equipment migtig. Apr 06, 2017 bob and sparky introduce us to the world of welding.
Two of the most common welding technologies used in factories across the u. For steel or aluminum low skill level can achieve good weld medium heat input. Apr 16, 2019 pulse welding is a variation on two core processes commonly taught in a welding training program. Gas tungsten arc welding gtaw, also known as tungsten inert gas tig welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. I can demonstrate the correct method of the mig machine operation. If you want to use mig wire for tig welding find a safety wire plier. There are three main types of welding machines and methods, mig vs tig vs smaw. Ppt tig welding introduction powerpoint presentation. Ppt mig welding powerpoint presentation free to view id. It can be used in welding automation systems for high quality welds. The 4 common gases used for mig welding are generally argon, helium, and carbon dioxide since any kind of mixture normally revolves around these 4 gases.
First check the recommended gas flow based on the nozzle selected and the metal size. These are reserved for specialty metals and aluminum. What separates tig welding from most other welding processes is the way the arc is created and how the filler metal is added. Numerous developments have taken place in tig welding technology over the past in power supply, shielding gas, tungsten electrode, and welding torches. Tig welding method and application tig welding definition the designation tig comes from usa and is an abbreviation of tungsten inert gas. The filler metal as a rod is applied manually by the welder into the. The main difference between these methods is the technique used. Obviously, i cant cover everything, but even if you get 1% smarter after reading this blog its a win. A nearperfect tig weld looks like a stack of dimes. The fittings are unique for inert gasses argonco2helium used in mig and tig welding applications. Welding processes are fairly simple to understand, and basic techniques can be learned quickly. Tig welding requires more practice than the mig welding, because of the complexity and the tighter tolerances to be maintained, while the mig welding is much more user friendly.
Tig and mig welding are arc welding processes in which the molten weld pool is protected from the atmosphere by a shroud of inert gas around the arc. It may seem a little daunting to learn a new skill or start out as a beginner, but once you start getting things, it will all be worth it. The evenness and accuracy of the weld bead is an indicator of the skill level of the welder. Mig also called gmaw is a process where metals are welded by heating them with an arc between the part. You are required to provide your own ppe for the lab. Mar, 2018 this versatility makes the tig welding great for many different kinds of projects.
The atig mechanism and productivity benefits in tig welding. Tig weldinggas tungsten arc welding gas tungsten arc welding is an arc welding process that uses a nonconsumable tungsten electrode and. Tig welding has become a popular choice of welding processes when high quality, precision welding is required. Medium weight gmaw mig gloves, such as black stallion mighty mig or miller mig glove. Tungsten inert gas also referred to as gtaw gas shielded tungsten welding in tig welding, a tungsten electrode heats the metal you are welding and gas most typically argon protects the weld from airborne contaminants background tig welding uses a nonconsumable tungsten filler metal, when required, is added by. Both of these welding processes are easy to learn, and the welding processes can be done on most of the common materials. Maximum weld quality is assured by maintaining cleanlinessall equipment and materials used must be free from oil, moisture, dirt and other impurities, as these cause weld porosity and consequently a decrease in weld strength and quality. Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of. Welding is a common process for joining metals using a large variety of applications. In tig welding without a filler, the term melt run may be. Find powerpoint presentations and slides using the power of, find free presentations research about gas welding ppt. Welding occurs in several locations, from outdoors settings on rural farms and construction sites to inside locations, such as factories and job shops. Tig welding introduction by daniel min outline background advantages and disadvantages safety preparation for tig welding techniques for basic weld joints tig. Here you are going to find all kinds of information whether you are into mig, tig, or stick welding.
Mig welding is used for nonferrous alloys but can be used for steel welding, whereas tig welding can be used for any metal. Welding, brazing, soldering does not include mechanical fastening such as bolts, rivets, screws, etc. Tungsten inert gas welding tig background what is tig. Mig welding is a commonly used high deposition rate welding process.
We manufacture a full line of products for welding schools, light to heavy duty metal fabricators, maintenance shops, home use and more. Clamp one end in a vise clamp, and the wire plier to the other end and twist it a few times. The major difference between mig and tig welding is that one process uses a continuously feeding wire mig and the other you use long. Mig vs tig welding the basics it is always striking to see a nearperfect tig weld on a finished product. V kumar a, bill lucas a, d howse a, g melton a, s raghunathan a and louriel vilarinho b. Mig welding metal inert gas welding mig is a process in which a consumable wire electrode is fed into an arc and weld pool at a steady but adjustable rate, while a continuous envelope of inert gas flows out around the wire and shields the weld from contamination by the atmosphere.
Mig welding is an arc welding process which produces the coalescence of metals by heating them with an arc. It may seem a little daunting to learn a new skill or start out as a beginner, but once you start getting things, it. The hose assembly would connect to the inert gas bottle or. Introduction to gas tungsten arc welding gtaw or tig. Paper presented at 15th international conference on the joining of materials jom 15 and 6th international conference on education in. The arc and weld pool formed using a bare wire electrode was protected by helium gas, readily available at that time mig welding gas metal arc welding is a process where a continuously fed metal electrode wire contacts the base metal and produces heat. Feb 20, 2014 welding is a common process for joining metals using a large variety of applications. In the world of welding, knowing your options is nearly as important as knowing how to weld. Optimization of mig welding process parameters for improving welding strength of steel c. Mig metalinert gas a fairtypical quality mig weld still hot. As tig requires both of the welders hands, its much easier to get to grips with mig.
Optimization of mig welding process parameters for. Powerpoint presentation tig welding introduction author. Welding is a process of permanent joining two materials usually metals through localized coalescence resulting from a suitable combination of temperature, pressure and metallurgical conditions welding is commonly classified in following types pressure welding. In automatic mig welding, a robot or automated machine makes the weld. The tig process uses the heat generated by an electric arc between the metals to be joined and an infusible tungstenbased electrode, located in the welding torch. Tig welding background initially developed in 1941 by russel meredith for welding magnesium, as its oxides have high m. The difference between tig and mig welding slideshare. Difference between mig and tig welding compare the.
In stick welding, just like tig and mig, the circuit begins with a secure connection between the ground clamp and the welding machine. If a filler metal is needed, it is fed into the weld puddle. The piece of metal to be joined are heated to plastic state and. Investigation of the atig mechanism and the productivity benefits in tig welding. Sep 10, 2012 mig welding is used for nonferrous alloys but can be used for steel welding, whereas tig welding can be used for any metal.
The weld is shielded by an inert gas, co2, to prevent oxidation. Metal inert gas mig welding, also sometimes called gas metal arc welding gmaw is a process that was developed in the 1940s for welding aluminum and other nonferrous metals. Next, adjust the gas welding machine to the suggested type of current and amperage for the tig process being performed. Welding quizzes welding presentations miller welding. Tungsten inert gas tig welding continues to be one of the major welding processes used in the industry for high quality joints. The art and science of joining metals by using the intrinsic adhesive and cohesive forces of attraction that exist within metals. This greater control is not to imply that tig is the superior welding method, as both methods offer similar ultimate tensile strengths as the original weld metal, assuming there are no weld defects in either process. Bob stresses the importance of filler metal and shielding gas. Tig is a process that gets the heat needed for welding from an electric arc that occurs between the part to be welded and a nonconsumable tungsten electrode.
Gas tungsten arc welding gtaw or tig welding in this process, a tungsten electrode is used along with shielding gas to heat the filler metal that is placed closely on top of the base metals and an arc created due to the power supply welds the joints. Metal inert gas mig welding was first patented in the usa in 1949 for welding aluminium. Principle of mig welding gas metal arc welding gmaw is commonly referred to as mig welding metal inert gas welding. Larry boyd sonja, heres a trick i learned from a good friend. Personnel protective equipment ppe welding technology. A free powerpoint ppt presentation displayed as a flash slide show on id. Tig welding processes increase efficiency and quality ewm has developed processes and functions, especially in the area of tigplasma subgroups 141 and 15 according to din iso 4063, using which customers can conduct their welding tasks more quickly, more efficiently and in the utmost quality. The operator starts the arc and controls the puddle. Presentations and quizzes explore welding quizzes and presentations from miller, covering topics like mig, tig and stick welding, basic electricity and filler metal selection. Pulse welding is a variation on two core processes commonly taught in a welding training program. Principles of mig welding technology ppt slideshare. Principles of mig welding technology ppt linkedin slideshare. There are several differences between mig and tig but the main one is that one you use long welding rods and feed them in to the weld puddle.
Kgk murti3, vvsh prasad 1,2assistant professor, 3,4professors, department of mechanical engineering, institute of aeronautical engineering, dundigal, hyderabad. Difference between tig welding and mig welding in hindi. In tig welding an arc is formed between a non consumable tungsten. Shielding gasses less commonly used in mig welding are helium, argon, and oxygen. How to compare and choose between mig and tig welding. Gas metal arc welding gmaw is frequently referred to as mig welding. Welding current is normally controlled by either a moving core in the main transformer or by. It is achieved by causing two oppositely charged metals or metals with a high potential difference to come into contact, creating massive amounts of heat as arcing occurs. Ppt tig welding introduction powerpoint presentation free. Each differs in the way the filler metal is applied to the joint.
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