基于DYNAFORM的电机盖板冲压成形数值模拟试验研究

利用有限元分析软件DYNAFORM对一种浅拉深、大尺寸电机盖板零件进行冲压成形数值模拟试验，研究各主要工艺参数及拉延筋对拉延成形质量的影响，并分析缺陷产生的原因. 采用正交试验和综合分析法进一步优化工艺参数，以减少板料成形过程中出现的破裂、起皱和拉深不充分缺陷. 研究表明，通过合理布置拉延筋及优化工艺参数，可以有效提升拉延成形质量. 最终得到的最优工艺参数组合为:拉延筋阻力系数50%、压边力600 kN、摩擦因数0.16、冲压速度5000 mm/s、凸凹模间隙1.1t，通过模拟试验验证该工艺参数组合的准确性和有效性.

Experimental research on stamping forming numerical simulation of motor cover plate based on DYNAFORM

The finite element analysis software DYNAFORM was used to stamp forming numerical simulation for a shallow depth and large size motor cover plate. The impacts of main process parameters and drawbead on the drawing quality were studied and the causes of defects were analyzed. Then orthogonal experiment and comprehensive scoring method were used to optimize the process parameters in order to reduce crack, wrinkle and insufficient stretch defects appearing in the process of sheet metal forming. It was found that the drawing quality could be effectively improved through the reasonable arrangement of drawbead and the optimization of process parameters. The optimal process parameter combination was obtained as follows: drawbead resistance coefficient 50%, binder force 600 kN, friction coefficient 0.16, stamping speed 5000 mm/s, die gap 1.1t. The simulation test verified the accuracy and effectiveness of the process parameter combination.