ã€ALUMINIUM NETWORK】Aluminum alloy is widely used in industrial products, because it has very good physical properties, but due to improper selection of welding methods and welding process parameters, causing serious stress due to excessive concentration of aluminum alloy parts after welding Deformation, or because of weld porosity, slag, incomplete penetration and other defects, resulting in weld metal cracks or loose material, seriously affecting product quality and performance. Next Xiaobian introduced aluminum alloy welding methods and aluminum alloy welding precautions.
Aluminum alloy welding method 1, tungsten electrode argon arc welding tungsten arc welding method is mainly used for aluminum alloy, is a better welding method, but tungsten argon arc welding equipment is more complex, not suitable for operation in open air conditions.
2, resistance spot welding, seam welding This welding method can be used to weld aluminum alloy sheet thickness of 5mm or less. However, the equipment used in welding is relatively complicated, the welding current is large and the productivity is high, and it is particularly suitable for mass-produced parts and components.
3, pulse argon arc welding pulse argon arc welding can be a good improvement in the stability of the welding process parameters can be adjusted to control the arc power and weld formation. The weldment has small deformation and small heat-affected zone. It is especially suitable for thin plate, all-position welding and other occasions, as well as welding of forged aluminum, hard aluminum and super hard aluminum with high heat sensitivity.
Aluminum Alloy Welding Precautions 1. Before the aluminum alloy is welded, the surface of the aluminum alloy must be cleaned. There must be no oil, dust, etc. The surface of the aluminum alloy welding joint can be cleaned with acetone. The thick aluminum alloy is cleaned with a wire brush, and then added. Acetone cleaning.
2. When the aluminum alloy is welded, it is necessary to clean the surface of the aluminum alloy first, and there must be no fumes, dust, etc. In addition, the thick aluminum alloy should be cleaned with a wire brush and then cleaned with acetone.
3, if the plate can be compared after the preheating of the plate, so as to prevent the preheating is not enough to make the weld impenetrable, when the arc is closed with a small current to fill the pit.
4, welding must be standardized, according to the thickness of the plate to be welded 5, welding torch cable not too long, if too long will cause wire feeding stability.
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