针对白车身激光焊接过程中热成形钢板变形较大的问题，通过几何补偿方法消除焊接变形对装配过程的影响，建立了钢板焊接变形的几何补偿优化流程，通过基于有限元方法的焊接过程模拟来预测激光焊接的板件变形程度，并结合最优拉丁超立方采样、Kriging近似模型与粒子群优化算法对B柱加强板进行几何补偿优化.结果表明，优化后的B柱加强板经过激光焊接后与原设计型面吻合较好.
Aimed at the problem that hot-forming steel parts occur large distortion after the laser welding of body-in-white, a geometry 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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