冲压件成形仿真及其预成形模具方案设计

Sheet Panel Forming Simulation and Scheme Design of Pre-forming Die

目的预测高强度钢板的冲压成形性。方法对使用高强度材料的左前地板2号横梁进行了数字仿真模拟,设计了一种提高板料抗破裂性能的带氮气弹簧的预成形模具。先根据仿真结果,在采用调整工艺参数的常规手段未果的情况下,分析了破裂原因,再根据成形模拟软件的使用要求,对氮气弹簧的技术特性进行了处理,保证能代入成形软件。结果再次成形模拟证明,采用氮气弹簧的预成形模具,能改善模具受力状态,使成形件不致破裂。结论预成形模具结构有助于改善特定形状冲压件的成形性。

Objective To predict the forming ability of high-strength steel. Methods Formability of panel C/MBR_FRT FLOOR_No. 2_LH, which adopted HSS, was analyzed in this paper. Preforming die with gas spring was designed to improve the anti-split ability of the blank. Firstly, according to the simulation result, the split reasons were analyzed, under the condition that the changing of process parameters by general method was not effective. Secondly, in order to use the parameter of gas spring, the technical characteristic of which was specially treated based on the using requirement of simulation software. Results The second simulation result showed that the stress state of die could be improved after adopting pre -forming die structure, and that cracks problems could be avoided. Conclusion The results also showed that pre-forming die structure is helpful to improve the forming ability of parts with specific shape.