冲压件坯料的优化设计方法研究

本文较为系统地介绍了冲压件坯料的优化设计方法 ,并比较分析了各自的优缺点。相比于其他方法 ,一步模拟方法效率高、适应面广、功能较强 ,可以在产品的设计之初提供较为丰富的信息 ,因此 ,该方法有着较好的前景。文章中一步模拟方法采用CST薄膜单元和DKT6板壳单元 ,这样 ,既可以考虑到面内薄膜内力的作用 ,也可以叠加弯曲效应对单元的影响 ,具有较高的精确度。最后采用实例验证了该方法的有效性和可靠性

The study of blank optimization methods for stamping parts

This paper deals with the main recent developments of blank optimization and the comparisons of their accuracy and efficiency. Nowadays, a simplified effective finite element method called the one step simulation (also called inverse approach) has been developed to estimate strain and stress distributions and blank optimization in sheet metal forming process. This one step simulation with CST membrane element and DKT6 plate bending element superposed to obtain the DKT12 shell element is fully introduced. An example of the determination of initial blank for a square cup drawing is given. The numerical analysis results show its correlation and agreement with the practical situation.