不锈钢超薄板多步冲压成形仿真与试验研究

Simulation and experimental study on multi-step stamping forming of ultra thin sheet of stainless steel

对氢燃料电池使用的金属双极板制备工艺进行研究,利用有限元仿真软件ABAQUS对厚0.1 mm的316L不锈钢进行多步冲压成形仿真分析,分析影响成形性能的因素,研究周期和脊槽比对极限成形深度的影响,获得响应面和响应面方程。根据仿真得到的最优参数设计模具进行成形试验,对冲压样品进行金相测量观察,验证仿真结果的准确性,继而制备较大的模具进行冲压。结果表明:仿真结果可以很好地契合试验结果,为实际模具设计提供准确参数,节约设计和修模成本,为后续研究不同厚度不锈钢超薄板冲压成形提供依据。

The manufacture process of metal bipolar plate used in hydrogen fuel cell was studied,and the finite element simulation software ABAQUS was used to simulate the multi-step stamping forming of 316L stainless steel with 0.1 mm thickness.The factors affecting the forming perfor⁃mance were analyzed,and then the influence of cycle and ridge groove ratio on the limit forming depth was studied,which obtained the response surface and its equation.According to the optimal parameters obtained by simulation,a small die was designed for forming test,and the metallo⁃graphic measurement and observation of stamping samples were carried out to verify the accuracy of simulation results,and then a larger die was manufactured for stamping.The results showed that the simulation results were in good agreement with the experimental results,so as to provide accurate parameters for the actual die design,save the cost of design and die repair,and provide a reliable basis for the subsequent research on the stamping forming of ultra thin sheet of stainless steel with different thickness.