Welding technology of aluminum alloy toolbox.

1. Preparation before welding: adopt machine or chemical methods to strictly prevent the oxidation film on both sides of the weld groove; Machine clearing can use electric or pneumatic milling cutter, as well as scrapers, files and other things as well as copper wire brush; Weld immediately after clearing, if the time span of 4h, it should be cleared.

2, choice of welding wire: generally choose 301 pure aluminum welding wire and 311 aluminum silicon welding wire.

3, pull welding method and parameters: generally carried out by left welding method, welding torch and workpiece into 60° Angle. When the welding thickness is more than 15mm, if the right welding method is used, the welding torch and the workpiece are 90° Angle.

4, aluminum box box welding difficulties: easy oxidation: Because aluminum boxes are generally used as raw materials of aluminum or aluminum alloy, and aluminum or aluminum alloy in the welding process is easy to oxidize, generate dense aluminum oxide film, in the welding process, it will block the fusion of the underlying metal, easy to form non-fusion, porosity and other shortcomings, resulting in reduced weld function