改进的等效拉延筋阻力模型及其应用

提出了一种改进的等效拉延筋阻力模型，采用三维有限元分析方法对客货箱右／左后门柱内板连接板的拉延成形工序进行模具设计和毛坯几何形状的优化。结合改进的等效拉延筋阻力模型，采用非线性约束优化算法对拉延筋结构进行了优化设计。根据有限元分析和优化设计结果进行实冲实验可得到质量良好的覆盖件产品，并且其典型截面的厚度分布与实验结果吻合良好，证明了改进的等效拉延筋阻力模型能准确反映板料通过拉延筋时的摩擦和弯曲阻力。

Application of an Improved Equivalent Drawbead Model on the Design of Deep Drawing Process

An equivalent drawbead model is presented in this paper.Three-dimensional finite element analysis on the deep drawing process was performed to determine the optimum process parameters for stamping a part of joined panel of gate pillar. The optimum design of the drawbead geometry was executed by means of nonlinear constraint optimization in conjunction with the improved equivalent drawbead model. The process and drawbead geometry parameters obtained from the FE analysis and the optimization design were validated by the achievements of defect-free production panels. The simulation results correspond well with those observed in the actual practice. It proves that the resistance force can be reflected effectively by the modified equivalent drawbead model.