基于稳健冲压工艺的门内板回弹补偿

Springback compensation of inner door panel based on robust stamping process

回弹是冲压件普遍存在的问题,很大程度上影响着冲压件的尺寸精度。以某车型前门内板零件为例,研究了冲压件的回弹补偿问题。首先根据门内板产品造型特性,设计了稳健的冲压工艺方案;然后利用Autoform软件对回弹进行模拟预测,制定了预回弹补偿方案;最后跟踪实际零件的尺寸情况,对全工序件进行扫描,并结合GOM软件分析实际与理论尺寸的偏差原因,制定了后回弹补偿方案,补偿后零件尺寸基本达标。结果表明,基于稳健的冲压工艺方案,对模面进行预补偿和后补偿,能稳定、有效地控制零件的回弹,为门内板类冲压件的回弹补偿提供一个参考思路。

Springback is a common problem in stamping parts and affects the dimensional accuracy of stamping parts greatly. For the front inner door panel of a car,the springback compensation problem of stamping parts was studied. First of all,a robust stamping process scheme was established according to the characteristics of inner door panel,then the springback was simulated and predicted by Autoform software,and a pre-springback compensation scheme was made. Finally,the practical dimension of parts was tracked,and the parts of the whole process were scanned to analyze the reason of practical and theoretical dimension deviation by GOM software. Furthermore,a post-springback compensation scheme was made,and the part dimension after compensation was basically up to standard. The result shows that based on a robust stamping process scheme,a pre-springback and post-springback compensation on the die surface can stably and efficiently control the springback of parts,which can provide a reference idea for the springback compensation of stamping parts such as inner door panel.