Chapter 3 introduction to welding in the navy as well as private industry, welding is widely used by metalworkers in the fabrication, maintenance, and repair of parts and structures. Tig welding is a skill that needs to be developed over time, with a piece of metal in front of you and with a welding torch in your hands. The essential feature of the process is the small diameter electrode wire, which is fed continuously into the arc from a coil. Guidelines for preparing a tungsten for ac tig welding are. Tig welding pipe welding techniques on how to walk the cup. Electric welding equipment etd 21 designator of legally binding document. Tig copper welding welding tips and tricks tig, mig. This document is a must for every welding school, fabricator and home hobbyist. Walking the cup is a welding technique that is almost exclusive to tig welding pipe. D use ac output only if required for the welding process. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. Welding, is a welding process that is now widely used for welding a variety of materials, ferrous and non ferrous.
Each of the above type of welding can be further classified depending on other micro level characteristics. Welding guide 1 welding buyers guide 1 the welding process 1 what to look for when choosing a welder 1 common welding processes 2 shielded metal arc welding smaw stick 2 gas metal arc welding gmaw mig 3 flux cored arc welding fcaw gasless 4 gas tungsten arc welding gtaw tig 5 multiprocess welders 6 inverter welders 6. It uses an arc between a tungsten electrode and the work to fuse the joint. Learn great tig welding techniques in part 1 of this 2 part video. Download the most uptodate, innovative software solutions for your tig welder instantly to a memory card for enhanced performance. The electrode is not melted and any filler metal needed to build up the weld profile is added separately. Ahw atomic hydrogen welding caw constricted arc welding tig tungsten inert gas arc welding mig metal inertgas arc welding mag metal activegas arc welding pjw plasma jet welding paw plasma arc welding pjpw plasma jet plasma arc welding gmgmma gasmixture shielded metalarc welding magm magc co2shielded metalarc welding ngw narrowgap welding. For a deeper dive into the science and skill of welding, be sure to check out the welding class. Tig welding dcsp direct current straight polarity produces deep penetration by concentrating heat in the joint area.
Tig welding is a method often used for joining of light metals and highalloy steels and it contains a number of risks as with other arc welding methods. Guide to tig welding this is a free basic guide on how to do tig welding using a tig welder tungsten inert gas tig welding is a skill that needs to be developed over time, with a piece of metal in front of you and with a welding torch in your. Brazilwelds soldas com messias carvalho 1,272,381 views. Tig welding can be carried out using dc for stainless steel, mild steel, copper, titanium, nickel alloys etc and ac for aluminium and its alloys and magnesium. What separates tig welding from most other welding processes is the way the arc is created and how the filler metal is added. When compared to various welding processes, tungsten inert gas tig, also known as gas tungsten arc welding gtaw, has been reported to generate a majority of particles at the nanoscale brand et al. Tig welding torches abitig grip air and liquid cooled the universal solution abitig grip the complete solution in the field of tig welding torches. The rtech tig201 acdc tig welder used in this guide 1. Many companies that hire tig welders wont even consider someone if they do not weld pipe by using the walking the cup technique. Tungsten inert gas tig welding, also known as gas tungsten arc welding gtaw is an arc welding process that produces the weld with a nonconsumable tungsten electrode.
Gas tig process uses the heat generated by an electric arc struck between a. The flying sparks, hot workpiece, and hot equipment can cause fires and burns. Jul 01, 2014 learn great tig welding techniques in part 1 of this 2 part video. The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas. This form of welding uses argon, sometimes mixed with helium or hydrogen. Air products welders handbook tungsten inert gas welding principles tungsten inert gas shielded welding is usually called tig welding.
When tig welding one hand is used for holding the tig torch that produces the arc and the other hand is to add the filler metal to the weld joint. Performed welding based on approved specifications. The tig process derives the heat for welding from an electric arc established between a nonconsumable tungsten electrode and the part to be welded. Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of the metals which are usually welded. Legally binding document step out from the old to the newjawaharlal nehru invent a new india. Pdf a study on tig welding process and its basic features as.
Jul 15, 2015 video aula solda tig posicao 2g video lesson, tig welding, 2g position. This is the welding industrys comprehensive reference on safety. Technical specifications for tig welding form 116 march 2016 the choice of master craftsmen. Guidelines for gas tungsten arc welding gtaw miller welding. When tig welding one hand is used for holding the tig torch that produces the arc and the other hand is to add the filler metal. Tig welding produces lots of heat and lots of harmful light, you need to take a few steps to protect yourself. In tig welding an arc is formed between a non consumable tungsten electrode and the metal being welded. Gas is fed through the torch to shield the electrode and molten weld. This technique is the industry standard for tig welding pipe. A guide to plasma cutting, oxyacetylene, arc, mig and tig welding, revised and updated finch, richard on. Select a tungsten with 2% cerium 2% thorium as your second choice.
During the welding process the electrode, the arc and the weld pool are protected against the damaging effects of the atmospheric air by an inert shielding gas. Tig welding tig welding gas tungsten arc welding gtaw is frequently referred to as tig welding. This range represents a logical development of the abitigtorch range, which has distinguished itself by its consistent implementation of modular design and optimum ergonomics. In tig welding an arc is formed between a non consumable tungsten. Filler metal, if used, is manually feed into the weld puddle when tig welding.
This chapter presents the principle of tungsten inert gas tig welding process besides important components of tig welding system and their role. Tig welding has become a popular choice of welding processes when high quality, precision welding is required. Tig welding dcrp direct current reverse polarity produces the best cleaning action as the argon ions flowing towards the work strike with sufficient force to break up oxides on the surface. In tig welding, the arc is formed between the end of a small diameter tungsten electrode and. Tig tungsten inert gas welding also known as gta gas tungsten arc in the usa and wig wolfram inert gas in germany, is a welding process used for. Tig welding uses tungsten, inert gas and weld rods to produce precise and attractive welds in steel and aluminum. Tig gtaw welding stick smaw welding om2242 208 580ac 2012. Tig welding is a manual welding process that requires the welder to use two hands to weld.
The principle of tungsten inert gas tig welding process. Welding procedure specification wps welding procedure no. Welded metal parts using brazing or gas welding or arc welding process. Ahw atomic hydrogen welding caw constricted arc welding tig tungsten inertgas arc welding mig metal inertgas arc welding mag metal activegas arc welding pjw plasma jet welding paw plasma arc welding pjpw plasma jet plasma arc welding gmgmma gasmixture shielded metalarc welding magm magc co2shielded metalarc welding ngw narrowgap welding. Gasshielded arc welding of aluminium gasshielded welding can be divided into the tungsten gasshielded welding and the. Using an inert gas shield instead of a slag to protect the. Saftey gear tig welding can be a pretty safe thing to do so long as you follow a few important safety precautions. Tig welding is a commonly used high quality welding process. Equipment for tungsten inert gas tig, gta welding twi. Tungsteninert gas tig welding equipment number of amendments.
Download this printable free guide to tig welding tig welding is a skill that needs to be developed over time, with a piece of metal in front of you and with a welding torch in your hands. This is true for all advanced tig machines, and especially for inverter because it optimizes performance. Check and be sure the area is safe before doing any welding. Tig welding how to tig weld, process overview and machine setup. Y also for overlay on steel as well as repairing cast iron castings. As a result this process can produce quick and neat welds over a wide range of joints. I am not aware of any video or training materials but you might check with the copper association. Experimental investigation of multipass tig welding using response surface methodology sreejith s nair1 corresponding author.
Tig welding differs from the other arc welding process by the fact that the electrode is not consumed like the electrodes in other process such as mig. Tungsten inert gas tig tig welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. Accidental contact of electrode to metal objects can cause sparks, explosion, overheating, or fire. Using an inert gas shield instead of a slag to protect the weldpool, this technology is a highly attractive alternative to gas and manual metal arc welding and has played a major role in the acceptance of high quality welding in critical applications. Tig stands for tungsten inert gas named from the tungsten electrode and the shield of inert gas. As such, tig welding fume nps are of particular occupational research interest due to their potential toxicological properties related. Sawp9201 consumables base material welding process root. Further information on the tig welding process follows information on equipment used in this document. Tig welding is an important joining process used in manufacturing industries. Experience gained from user contact and welding training of crewmembers showed that. Tungsten inert gas tig welding became an overnight success in the 1940s for joining magnesium and aluminium. Even if you are not an instructables member, free pdf downloads of all our machine manuals are available here. Gas tungsten arc welding hegesztestechnika welding. Tig welding method and application tig welding definition the designation tig comes from usa and is an abbreviation of tungsten inert gas.