锻压技术

帽形件链模成形仿真与试验研究

英文标题：Simulation and experimental study on chain-die forming of hat-shaped part

作者：张智恒钱朕李亚光丁士超李大永

单位：海交通大学昆士兰大学

分类号：TG335

出版年,卷(期):页码：2019,44(4):35-39

摘要：

通过数值模拟与成形试验的方法，研究多道次链模成形帽形件的可行性。建立了多道次链模成形帽形件的有限元模型，研究了成形过程中应力、应变的分布情况及发展历程，并估算了各道次机架的工作载荷。基于仿真结果，开发了多道次链模成形试验机，进行了帽形件的成形试验，结果发现，成形过程中未出现圆角破裂，成形效果良好。最后,将试验结果分别与仿真结果和目标形状进行对比发现，虽然腹板区域仍然存在轻微成形质量问题，但翻折角和压深的误差分别被控制在1°和0.5 mm以下，成形目标基本实现，通过对比既验证了仿真模型的准确性，也说明成形方案的可行性。

By means of numerical simulation and forming test, the feasibility of multi-pass chain-die forming for hat-shaped part was studied, and the finite element model of multi-pass chain-die forming for hat-shaped part was established. Then, the distribution and development history of stress and strain in the forming process were studied, and the working loads of machine frame for each pass were estimated. Based on the simulation results, a testing machine of multi-pass chain-die forming was developed, and the forming test of hat-shaped part was carried out. The result shows that no fracture occurs on fillets during the forming process, and the final shape is fine. Finally,by comparing the test results with the simulation results and the target shapes respectively, although a slight forming quality problem is found at the web area, but the errors of folding angle and pressing depth are controlled below 1° and 0.5 mm respectively, and the forming goal is basically achieved. By comparison, the accuracy of simulation model is verified, and the feasibility of forming scheme is also demonstrated.

基金项目：

国家自然科学基金资助项目(U1860110)

张智恒（1994-），男，硕士研究生 E-mail：zac-zhang@sjtu.edu.cn 通讯作者：李大永（1973-），男，博士，教授，博士生导师 E-mail：dyli@sjtu.edu.cn

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