基于Autoform-Sigma的汽车A柱内板冲压工艺参数优化

以某汽车A柱内板为研究对象,针对拐角区域开裂、起皱问题,以拉延筋系数、板料尺寸、摩擦系数和压边力为优化变量,以无开裂、无起皱为优化目标,借助Autoform-Sigma模块进行冲压工艺参数的优化设计与分析。该模块通过采用质量管理和统计学理论相结合的方法,经过64次迭代运算,最终找到无开裂、无起皱的理想模拟结果和最优冲压工艺参数,即:拐角处的拉延筋系数为0.28、板料尺寸偏差为-4 mm、压边力为780 kN和摩擦系数为0.13。按照最优冲压工艺参数进行生产试验,冲压出的零件状态良好,无开裂和起皱缺陷,与数值模拟结果一致,验证了该方法的可行性,同时节约了大量的时间和成本。

Optimization on stamping process parameters of automobile A-pillar inner panel based on Autoform-Sigma

For the problems of cracking and wrinkling in the corner area of a certain automobile A-pillar inner plate,taking drawbead coefficient,sheet size,friction coefficient and blank holder force as the optimization variables and no cracking and no wrinkling as the optimization objectives,the optimization design of stamping process parameters was conducted analyzed with the help of Autoform-Sigma module,and this module adopted the method of combining quality management and statistical theory to find the ideal simulation results without cracking and wrinkling defects and the optimal combination of process parameters with the drawbead coefficient in the corner of 0. 28,the sheet size offset of -4 mm,the blank holder force of 780 kN and the friction coefficient of 0. 13 finally after 64 iterations. Furthermore,the production experiment was carried out according to the optimal stamping process parameters,and the stamping part was in good condition without cracking and wrinkling defects,which was consistent with the numerical simulation results. Thus,the feasibility of this method was verified,and a lot of time and cost were saved.