Aluminum alloy welding method and the matters needing attention
Publish Time: 2016-09-27 Origin: Site
Aluminum alloy is widely used in industrial products, because it has good physical properties, but due to improper selection of welding methods and welding technology parameters, creates aluminium alloy parts because of stress concentration have serious deformation after welding, or because the weld defects such as porosity, slag inclusion, incomplete fusion, result in weld metal cracks or loose material, seriously affected the product quality and performance.Small make up next to introduce the aluminum alloy welding method and aluminum alloy welding.
Aluminum alloy welding method
1, the tungsten electrode argon arc welding
Tungsten argon arc welding method is mainly used for aluminium alloy, is a kind of good welding method, tungsten argon arc welding equipment is relatively complex, however, is not suitable in the open air under the conditions of operation.
2, the resistance spot welding, seam welding
This kind of welding method can be used to weld thickness less than 5 mm in aluminum alloy sheet.But when welding with complicated equipment, welding current, high productivity, especially suitable for mass production of parts and components.
3, pulse argon arc welding
Pulse argon arc welding can well improve the stability in the welding process can adjust parameters to control the power of electric arc and weld.Welding deformation is small, small heat affected zone, especially suitable for sheet, all position welding, etc and wrought aluminium for thermal sensitivity is strong, hard aluminum, super-hard aluminum welding.
Aluminum alloy welding
1, to clean up before welding aluminum alloy aluminum alloy surface, there can be no oil, dust and so on, can use acetone to clean the surface of aluminum alloy spot welding, plate aluminum alloy to use wire brush to clean up, after adding acetone to clean.
2, need to clean up when welding aluminum alloy aluminum alloy surface, there can be no lampblack, dust, etc., and thick plate aluminum alloy to use wire brush to clean up, and then add acetone to clean.
3, if the board is to preheat, this can prevent preheat welding as it causes is not opaque, in charge of arc with small current arc filling holes.
4, welding must be specifications, according to the thickness of the plate to weld
5, welding torch cable not too long, if too long will cause the wire feed stability.