油底壳成形过程数值模拟的优化建模研究

Modeling optimization research on numerical simulation of oil-pan forming process

在金属成形过程中 ,采用有限元方法可以降低模具设计过程中的费用 ,减少试错过程的消耗。该文采本用有限元软件MARC研究了有限元建模中的几个关键参数 ,如材料模型、网格划分方法、单元类型、摩擦系数对成形件壁厚的影响。研究发现 ,模拟结果与实验结果具有较好的一致性 ,模拟与实验间的偏差是由于简化了模具与工件间的接触条件。通过有限元分析得到了一个优化的模型 ,该模型为建模过程提供了一个更加精确的解决方法 。

The application of FEM into metal forming processes is a powerful tool for more economical design and reducing costly trial-and-error processes. In the presented study, the effects of several key parameters in FE modeling such as material model, mesh partition, element type, friction coefficient on the thickness of element are investigated by FE software, MARC. The calculations are compared with the results of experiment. Divergences between theoretical and experimental results occur due to the simplification of contact condition at the die-workpiece interface. The optimum model derived from FEM analysis provides an accurate solution and small convergence. It also has merit in not requiring excessive computation time.