Automobile bent profile welding deformation compensation method and system

Abstract

The invention discloses an automobile bent profile welding deformation compensation method and system, and the method comprises the steps: carrying out the welding simulation of automobile sub-assembly data, and determining a position and an out-of-tolerance amount of a size caused by welding deformation; according to the out-of-tolerance position and the out-of-tolerance amount, determining the welding compensation amount needed when a profile is bent, so that profile data obtained after welding compensation is determined; and simulating the bending forming process of the profile data, continuously adjusting the bending forming angle and considering springback compensation, so that the size of the profile data after bending forming is approximate to that of the profile data. According tothe automobile bent profile welding deformation compensation method, the welding deformation compensation problem is considered from the beginning of profile bending forming, so that the size out-of-tolerance caused by welding deformation is fundamentally controlled, the welding deformation optimization time can be greatly shortened, and the manpower and material resource consumption of product development and manufacturing can be reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for compensating welding deformation of automobile curved profiles. Background technique [0002] Since the extruded aluminum profile is a cavity structure, it has the advantages of strong design flexibility, low mold development cost, and high structural strength. At present, aluminum profiles are widely used in the field of automobile manufacturing, among which profile bending parts (including 2D & 3D bending) are widely used. It is used in the A-pillar, B-pillar, roof side beam and other positions of the car. [0003] At present, the connection methods for profiles are mainly cold connection FDS, aluminum arc welding, etc. Among them, aluminum arc welding is the most economical and convenient, but it brings problems such as large deformation and poor dimensional accuracy of vehicle assembly. [0004] At present, the commonly used methods to control thi...

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Problems solved by technology

[0003] At present, the connection methods for profiles are mainly cold connection FDS, aluminum arc welding, etc. Among them, aluminum arc welding is the most economical and convenient, but the problem is that the deformation is large and the dimensional accuracy of the vehicle assembly is poor.

[0004] At present, the commonly used methods to control this welding deformation are to optimize the fixture, adjust the welding sequence, and use anti-deformation, etc., but they cannot effectively control the dimensional out-of-tolerance caused by welding deformation fundamentally, and the method of controlling welding deformation needs continuous verification and optimization, the time period is longer, and the consumption of manpower and material resources is greater

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