Method for welding automobile aluminium alloy bumper assembly

Abstract

A method for welding an automobile aluminium alloy bumper assembly belongs to the technical field of metal welding. The automobile aluminium alloy bumper assembly consists of a beam, an energy absorption box and a support, wherein two sets of welding tools are respectively adopted to weld the automobile aluminium alloy bumper assembly step by step, firstly, the energy absorption box and the support are welded with each other, and then, the energy absorption box and the support which are welded with each other are welded with the beam. A welding device can be adjusted and positioned according to the characteristics of weldments, and the weldments are fixed, so that deformation after the welding is avoided; and an alternating current electric welding machine is adopted for manual argon tungsten-arc TIG (tungsten insert gas) welding, the technological parameters of welding wire material, welding current, welding speed, wire feed speed and the like are adjusted so as to carry out optimal matching, and the welding defects can be avoided. The method has the characteristics of flexibility and simplicity in welding equipment, convenience in operation, stability in welding, quick welding speed, low production cost, less filler wires, less welding layers, small deformation, no correction for welding, attractiveness in appearance formation, high welding quality and the like.

Description

technical field [0001] The invention relates to the field of metal welding technology and devices, in particular to a welding method for an aluminum alloy bumper assembly for automobiles. Background technique [0002] As people put forward higher requirements for energy saving, environmental protection, and safety, the application of lightweight and high-strength materials such as aluminum alloys has attracted widespread attention. Aluminum alloy has high specific strength, fracture toughness, fatigue strength and corrosion resistance stability, and good process formability and welding performance. [0003] In automobile manufacturing, in order to increase the rigidity of the automobile frame, reduce the weight of the automobile, and improve the collision performance of the automobile, aluminum alloy materials are widely used. With the use of all-aluminum body cars, welded structures such as aluminum alloy extruded profiles and thin plates play an increasingly important rol...

AI Technical Summary

Problems solved by technology

The above methods or device pairs are all aimed at the TIG welding process and welding device of the specific welding workpiece. They are not fully applicable when used for other aluminum alloy workpieces. Various welding defects, welding deformation and other assembly defects may occur. For specific The workpiece needs to carry out the formulation of the specific welding process and the design of the device

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