Laser welding method of aluminum alloy and plastic, grinding jig and clamping jig

Abstract

The invention provides a laser welding method of aluminum alloy and plastic, a grinding jig and a clamping jig. The laser welding method comprises the following steps: (1) surface grinding treatment of the joint end faces of the aluminum alloy sample and the plastic sample; (2) Nanosecond laser pre-etching treatment on the end face of the aluminum alloy sample; (3) The joint ends of the aluminum alloy sample and the plastic sample are assembled and welded by laser. The laser welding method of the present invention uses a grinding fixture to grind the surfaces to be welded of the aluminum alloy sample and the plastic sample, so that the two can obtain inclined end faces with the same slope, and perform nanosecond laser welding on the aluminum alloy surface Pre-etching treatment, finally clamped by a clamping fixture and formed by laser multi-pass welding, can effectively improve the design freedom of the aluminum alloy sample and plastic sample joint, reduce the stress concentration caused by the lap joint form, and the welding speed Fast, the quality of the joint is good, the sample after welding does not need post-processing and has reliable strength.

Description

technical field [0001] The invention relates to a laser welding method of aluminum alloy and plastic, a grinding fixture and a clamping fixture, which are applied to the laser connection in the form of lap joint and butt joint mixed joint between aluminum alloy and plastic dissimilar materials, belonging to welding and connection technology field. Background technique [0002] With the gradual popularization of automobiles, the problem of environmental pollution has become increasingly serious. Studies have shown that for every 10% reduction in vehicle weight, fuel consumption can be reduced by 6% to 8%, and the improvement of fuel economy means a corresponding reduction in greenhouse gas emissions. In order to meet the requirements of environmental protection and fuel saving, it is necessary to use materials that reduce the weight of the car body to reduce energy consumption and pollution. Aluminum alloy has relatively high specific strength, good plastic toughness and co...

AI Technical Summary

Problems solved by technology

At this stage, no scholars have studied the butt joint welding process of aluminum alloy and plastic. This is because the butt joint area of ​​thin plates is small, and the wettability of metal and plastic is very poor, so it is difficult to form a reliable connection.

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