利用LS -DYNA3D软件对一吨车前横梁的冲压成形过程进行了数值模拟 ,揭示了零件的开裂问题主要是由于零件在预成形阶段变形程度过大造成的 .对冲压工艺及模具的调试过程进行了模拟 ,得出了解决问题的具体措施 :增大凸模的摩擦系数、增加凸、凹模底部顶角对应侧壁局部间隙、增加凸模底部顶角局部圆角半径、增加凹模底部顶角对应入模口局部圆角半径等可以有效地减轻零件的变形程度 ,解决零件预成形过程中底部顶角开裂的问题 The LS-DYNA3D software was used to simulate the stamping process of a ton of vehicle front beam, which revealed that the cracking of the part was mainly caused by the excessive deformation of the part during the pre-forming stage. The stamping process and the debugging process of the mold The simulation results show that the specific measures to solve the problem are as follows: increasing the friction coefficient of the punch, increasing the partial clearance between the top corner of the punch and the die corresponding to the side wall, increasing the radius of the fillet of the top corner of the punch bottom, Angle corresponding to the corner radius into the die can effectively reduce the degree of deformation of the parts to solve the problem of pre-forming parts of the bottom corner cracking