锻压技术

变压边力护罩深冲成形工艺

英文标题：Deep drawing process of shield under variable blank holder force

作者：魏圣坤

单位：泸州职业技术学院

分类号：TG386

出版年,卷(期):页码：2020,45(5):94-99

摘要：

以直壁盒形结构车用护罩深冲成形为研究对象，针对其成形过程中出现的起皱和拉裂缺陷，通过有限元对比分析了其在整体压料面和分区压料面作用下的成形效果, 模拟了分区压料面解决采用常规成形时出现的缺陷。结果表明：采用分区压料面能够大幅改善深冲成形质量，解决采用整体压料面出现的开裂和起皱缺陷。进一步地,通过设计中心复合试验，以压边力、冲压速度、摩擦系数作为因素，通过建立因素与目标之间的二阶多项式函数模型，对各压边力取值及关键工艺参数进行优选，得出最佳工艺参数组合。采用分区压料面和优化后的参数进行试模，制件成形效果良好，成形缺陷成功解决，验证了模拟结果的正确性。

For the wrinkle and crack defects in the deep drawing process of vehicle shield with straight-wall box structure, the forming effects under the whole binder surface and the separate binder surface were compared and analyzed by finite element, and it was simulated that the separate binder surface solved the defects caused by the conventional forming. The results show that the deep drawing quality improves greatly by using the separate binder surface, and the crack and wrinkle defects caused by the whole binder surface are solved. Furthermore, through the design center compound experiment, taking blank holder force, stamping speed and friction coefficient as factors, by establishing the second-order polynomial function model between the factors and the targets, the values of blank holder force and the key process parameters were optimized, and the best combination of pracess parameters was obtained. Meanwhile, the forming effect of parts is good by the trial experiment under the separate binder surface and the optimized parameters, and the forming defects are successfully solved to verify the correctness of this simulation results.

基金项目：

智能制造泸州市重点实验室开放基金（GY201804）

魏圣坤（1982-），男，硕士，讲师，E-mail：jieshuli37033033@163.com

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