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Distortion Prediction and Geometry Compensation Method for Laser Welding-Induced Distortion of Body-in-White

WANG Qing;LIU Zhao;HUANG Pinghua;ZHU Ping;State Key Laboratory of Mechanical System and Vibration;SAIC Volkswagen Automotive Co.,Ltd.;  
Aimed at the problem that hot-forming steel parts occur large distortion after the laser welding of body-in-white,ageometry compensation method was presented to eliminate the impact of weld-induced distortion,and the process of this method was established.The welding-induced distortion was accurately predicted based on finite element method.The geometry compensation solution of B-pillar was obtained utilizing optimal Latin hypercube method,Kriging metamodel technology and particle swarm optimization algorithm.Results show that the optimized B-pillar is in a good agreement with the ideal design after laser welding procedure.
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