Basic knowledge of argon arc welding process
In TIG welding (tungsten inert gas), the welding arc is formed between a non-consumable tungsten electrode and the workpiece. The shielding gas is often an inert gas and does not itself affect the welding process. The shielding gas is usually argon, which not only protects the molten weld, but also protects the electrode in the welding gun from oxidation.
Filler material may not be necessary for TIG welding. Workpieces can also be fused as the wheel grooves melt together. If welding wire is used, it is fed manually into the molten weld rather than through a welding gun as in gas metal arc welding. Therefore, the construction of TIG welding guns is completely different from MIG/MAG welding guns.
Various TIG welding methods include DC TIG welding using direct current, AC TIG welding using alternating current, and pulse TIG welding.
TIG welding applications
The most important application of TIG welding is pipe and tube welding. However, it is also used in several industries, such as the aerospace and sheet metal industries, for welding particularly thin materials and specialty materials such as titanium.
Argon arc welding is suitable for manual welding and mechanized welding, and is also suitable for the use of welding robots.
Argon arc welding machine
Argon arc welding equipment consists of a power supply, ground cable, welding gun and protective gas tank or gas network interface. The welder may also contain a water cooling unit. TIG welders do not require a wire feeder because the filler material is fed manually.
Argon arc welding technology
Argon arc welding is suitable for use when the appearance of the weld is pursued. This places special demands on the accuracy of welding operations. In addition, TIG welding is becoming more and more demanding because this welding technology has more issues that need to be controlled than other technologies. In TIG welding, the welder uses one arm to move the gun and the other arm to feed filler material into the molten weld. Therefore, the TIG welder must accurately control both arms and cannot support the welding gun with one arm like gas metal arc welding.
These special requirements make TIG welding more difficult to operate, especially in the beginning. However, the arm quickly becomes accustomed to the path required for welding, and the welder becomes proficient in TIG welding. However, demanding TIG welding is usually done by welders who specialize in TIG welding.
TIG welding is done by moving the welding gun. You can feed the wire into the weld bit by bit or continuously so that there is always wire in the molten weld.