How can common argon arc welding machine weld aluminum?
If there is no requirement for the welding seam, it is better to use AC argon arc welding machine instead of direct current reverse welding.
DC reverse welding can also do a little welding, but the weld is ugly and the tungsten electrode is extremely heavy.
There is no common argon arc welding. The most common is DC TIG welding.DC TIG welding can reverse connection (welding torch is connected with the anode +, ground - Welding of aluminum anode).The affinity of aluminum and oxygen is stronger, and oxidation can occur at normal temperature. In the process of welding high temperature, the oxide film is easy to be produced on the surface of molten aluminum. The AC tungsten argon arc welding machine is usually used for welding. The alternating current has the function of cathode breaking and breaking the oxide film.When using DC reverse connection, the tungsten electrode is affected by the high speed impact of the electron. It also has the function of removing oxide film. But the disadvantage is that the tungsten is heated, the temperature is high, the consumption is quick, and the service life is short.
