基于Autoform有限元软件对前罩外板的成形过程进行了数值模拟,预测了成形过程中板料的开裂、起皱等缺陷。研究了板材的屈服强度、应变硬化指数对前罩外板成形性能、减薄率的影响。结果表明,采用4工序可以冲压出高质量的前罩外板,较小的屈服强度、较大的应变硬化指数有利于前罩外板的成形。 Based on the finite element software Autoform, the forming process of the front outer shell was numerically simulated, and the defects such as cracking and wrinkling of the sheet during the forming process were predicted. The effects of yield strength and strain hardening index on the formability and thinning ratio of the outer shell of the front cover were studied. The results show that 4 steps can be punched out of high quality front outer shell, a smaller yield strength, a larger strain hardening index is conducive to the front outer shell forming.