高强度激光拼焊板具有减轻车身重量、节能环保、改善车身安全性能等优点。研究了工艺参数对差厚高强度激光拼焊板B340/590DP成形汽车B柱的影响规律,设定了冲压速度、压边力、模具间隙、摩擦系数4个工艺参数的正交试验方案,利用有限元软件Dynaform对B柱内板成形过程进行模拟,得到关于最小减薄率的最优参数。利用软件中回弹补偿模块进行拉延模具修正,利用优化的工艺参数,进行了工艺试验。试验结果与模拟结果一致,即制件成形良好,焊缝没有破裂,回弹量小于1mm,最小减薄率小于20%。采用有限元方法与工艺试验相结合的方法,减少了修模次数,得到了合格的零件。 Tailor-made high-intensity laser welding plate has the advantages of reducing body weight, energy saving and environmental protection, improve body safety performance. The influence of process parameters on the B column of B340 / 590DP blanket with poor thickness and high strength was studied. The orthogonal experiment scheme of four process parameters of pressing speed, blank holder force, die clearance and friction coefficient was set up. Finite element software Dynaform was used to simulate the process of forming B-pillar inner plates, and the optimal parameters of minimum thinning rate were obtained. Using software rebound compensation module for drawing die correction, the use of optimized process parameters, the process test. The test results are consistent with the simulation results, that is, the part is well formed, the weld is not cracked, the springback is less than 1mm and the minimum thinning rate is less than 20%. Adopting the combination of finite element method and process test, the number of mold repairing is reduced and qualified parts are obtained.