Plasma welding of aluminum alloys of small thicknesses
The results of the development of technologies for plasma welding, plasma arc current of reverse polarity with simultaneous supply of welding wire, aluminum alloys AMg5 2 mm thick. Aluminum alloys have unique properties that make them a wide application in aircraft and shipbuilding, chemical equipment, construction. However, aluminum has a number of factors which greatly complicate the process of welding. It should be noted that when welding aluminum alloy of small thickness have additional difficulties in manufacturing technology. This is primarily due to the right choice of parameters and preventing burn-through mode, as well as the use of special devices backer. This article presents an analysis of modern methods of welding aluminum small thicknesses. A version of welding of aluminum alloys at the plasma arc torch to reverse the polarity of the current. The use of the plasma arc enables highly concentrated source of energy, to obtain defect-free weld. It is shown that the use of the current reverse polarity provides quality clean metal surface from dirt and oxide film, plasma welding process significantly increases the productivity of the process. The dependence of the geometry of the weld wire feed speed.