What is TIG Welding?

Argon arc welding is a welding technique that uses argon as a shielding gas. ^[1] Also called argon gas shielded welding. It is to pass an argon shielding gas around the arc welding to isolate the air from the welding zone to prevent oxidation of the welding zone.

Tungsten inert gas shielded welding (TIG). Is in

The working principle of argon arc welding in the main circuit, auxiliary power supply, drive circuit, protection circuit, etc. is the same as hand arc welding. No more description here, but focus on the unique control function and arcing circuit function of argon arc welding machine.

TIG welding is divided into two types: melting electrode TIG welding and non-melting electrode TIG welding.

The reason why argon arc welding can be so widely used is mainly because of the following advantages.

1. Argon protection can isolate the adverse effects of oxygen, nitrogen, hydrogen, etc. on the arc and the molten pool in the air, reduce the burning of alloy elements, and obtain dense, spatter-free, high-quality welded joints;

2. The arc combustion of argon arc welding is stable, the heat is concentrated, the arc column temperature is high, the welding production efficiency is high, the heat affected zone is narrow, and the weldment has less stress, deformation and crack tendency;

3. TIG welding is open-arc welding, easy to operate and observe;

4. The electrode loss is small, the arc length is easy to maintain, and there is no flux or coating during welding, so it is easy to realize mechanization and automation;

5. TIG welding can weld almost all metals, especially some refractory metals and easily oxidizable metals, such as magnesium, titanium, molybdenum, zirconium, aluminum and their alloys;

6, not limited by the position of the weldment, all-position welding can be performed. ^[2]

1. Because of the large heat-affected area of argon arc welding, workpieces often cause deformation, excessive hardness, trachoma, local annealing, cracking, pinholes, wear, scratches, undercuts, or insufficient bonding force and internal stress after repair. Damage and other disadvantages. Especially during the repair of small defects in precision castings, the surface is prominent. Can be used in the repair of precision casting defects

TIG welding is suitable for welding non-ferrous metals and alloy steels (mainly Al, Mg, Ti and their alloys and

Harm of argon arc welding fumes

TIG welding is mainly used for welding of aluminum and aluminum alloys, copper and copper alloys, magnesium and magnesium alloys, titanium and titanium alloys, and high temperature alloys. It is widely used in many important industrial sectors. In addition to the same electric shock, burns, and fire as electrode arc welding, argon arc welding also has high frequency electromagnetic fields, electric shock radioactivity, and arc light damage that is much stronger than welding arc welding ^[4] .

Argon arc welding fume purification

1. Natural ventilation.

2. Cartridge type mobile welding smoke purifier.

3. High negative pressure welding smoke dust collector.

Natural ventilation has the lowest cost. It adopts purely natural methods. It reduces the concentration of welding smoke in the workshop by opening windows and installing shutters.

Cartridge-type mobile welding smoke purifier, aiming the universal suction arm at the point generated by welding smoke. Through the negative pressure generated by the system, the dust and toxic and harmful gases generated from the welding fume are sucked into the purifier and collected. Cartridge type mobile welding smoke purifier has a wide range of applications. It is convenient and flexible and easy to move. Can meet a variety of flexible working conditions.

High-negative pressure welding smoke dust collector mainly connects the 50mm caliber hose directly to the welding machine head. The dust collector works when the welding machine is working, and the dust collector stops when the welding machine is stopped. This ensures that while using the minimum air volume, welding fumes are effectively processed. In addition, the high negative pressure welding smoke dust collector can be connected to a hose of up to 20m in length, which can be effectively connected to the automatic welding head. The shortcomings of the manual suction position of the mobile suction arm are overcome. Automation is being done, and the collection and purification effect is remarkable. ^[5]

Argon arc welding fume purification