基于数值模拟技术的汽车覆盖件模具变形预测  

Deformation Prediction of Automobile Panel Die Based on Numerical Simulation Technology

作　　者：钱广阔 于强[2] QIAN Guang-kuo;YU Qiang(Tianjin Automotive Mould Parts Co., Ltd, Tianjin 300300, China;School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, China)

机构地区：[1]天津天汽模模具部件有限公司,天津300300 [2]天津职业技术师范大学机械工程学院,天津300222

出　　处：《机械研究与应用》2019年第1期74-76,85,共4页Mechanical Research & Application

基　　金：天津市高校中青年骨干创新人才培养计划(编号:RC180204);天津市高校中青年骨干创新人才培养天津市企业科技特派员资助项目:高强钢板成形全场应变演化表征及损伤失效(编号:18JCTPJC64500);天津职业技术师范大学校级科研资助项目:汽车高强度板高温变形检测与成形工艺研究(编号:KJ1809)

摘　　要：汽车覆盖件模具冲压过程中凸凹模工作型面的动态配合精度是影响冲压件制造精度以及模具整体制造周期的关键因素之一。通过UG和LS-DYNA软件,进行了某模具在最大冲压力条件下的弹性变形有限元仿真,发现凸模和压边圈型面中间区域Z向位移较大,靠近型面的边缘Z向位移逐渐减小;凹模Z向位移最大值出现在模具外侧,而凹模型面内凹部分位移量较小。通过分析接触压强分布规律发现,凸模和凹模型面中心区域的接触压强较四周区域压强小,压边圈型面部分接触压强较为均匀。研究结果对于提高模具动态配合精度、缩短模具调试制造周期具有实际应用价值。The dynamic matching accuracy of punch and die working surface in the stamping process of automobile panel die is one of the key factors affecting the manufacturing accuracy of stamping parts and the overall manufacturing cycle of the die. In this paper, with the UG and LS-DYNA software, the finite element simulation of elastic deformation of a die under the maximum stamping force is carried out. It is found that the Z-direction displacement in the middle area of the punch and the blank holder is larger, and the Z-direction displacement near the edge of the die is gradually reduced;while the Z-direction displacement of the die appears at the outer side of the die, and the displacement of die concave part is small. By analyzing the distribution law of contact pressure, it is found that the contact pressure in the center area of punch and die surface is smaller than that in the surrounding area, and the contact pressure in the blank holder surface is more uniform.

关 键 词：汽车覆盖件模具 模具变形 数值模拟 

分 类 号：TG385.2[金属学及工艺—金属压力加工]