Key Technologies for Aluminum Sheet Welding

Aluminum alloy is widely used in industrial products due to its excellent physical properties, and almost all welding methods can be used to weld aluminum and aluminum alloys. However, aluminum and aluminum alloys have different adaptability to various welding methods, and each welding method has its own application field.

Due to improper selection of welding methods and welding process parameters, aluminum alloy parts undergo severe deformation after welding, or defects such as weld porosity, slag inclusion, and incomplete penetration can cause cracks or material looseness in the weld metal, seriously affecting product quality and performance. The following editor will take you to analyze the methods and precautions for aluminum alloy welding.

Three Welding Methods for Aluminum Alloys

Tungsten inert gas arc welding

The tungsten inert gas arc welding method is mainly used for aluminum alloys and is a good welding method. However, the tungsten inert gas arc welding equipment is complex and not suitable for outdoor operation.

Resistance spot welding and seam welding

This welding method can be used to weld aluminum alloy thin plates with a thickness of less than 5mm. However, the equipment used during welding is relatively complex, with high welding current and productivity, making it particularly suitable for large-scale production of parts and components.

Pulse Argon Arc Welding

Pulse argon arc welding can greatly improve the stability during the welding process by adjusting parameters to control arc power and weld formation. The welded parts have small deformation and heat affected zone, making them particularly suitable for aluminum sheet welding, welding thin plates, all-position welding, and welding forged hard aluminum, superhard aluminum, etc. with strong thermal sensitivity.

Welding Precautions for Aluminum Alloys

1. Before welding aluminum alloy, the surface of the aluminum alloy must be cleaned to avoid oil stains, dust, etc. Acetone can be used to clean the surface of the aluminum alloy welding area. For thick plate aluminum alloy, a steel wire brush should be used to clean it, and then acetone should be added for cleaning

2. When welding aluminum alloy, the surface of the aluminum alloy should be cleaned first, without oil fumes, dust, etc. In addition, thick plate aluminum alloy should be cleaned with a steel wire brush, and then cleaned with acetone.

3. If the plates can be preheated after comparison, it can prevent insufficient preheating from causing incomplete welding. When extinguishing the arc, a small current should be used to fill the pit.

4. When welding, it is necessary to standardize and weld according to the thickness of the plate. The cable of the welding gun should not be too long, as it can cause stable wire feeding.

5. The cable of the welding gun should not be too long, as it can cause stable wire feeding.