汽车前防撞梁的热冲压成形数值模拟与试验  

Numerical simulation and experiment of hot stamping for front bumper of automobile

作　　者：郭怡晖[1] 马鸣图[1] 张宜生[2] 宋磊峰[1] 方刚[1] 金建伟[3] 

机构地区：[1]中国汽车工程研究院股份有限公司,重庆400039 [2]华中科技大学材料科学与工程学院,湖北武汉430074 [3]吉利汽车研究院,浙江杭州311228

出　　处：《锻压技术》2013年第3期46-50,共5页Forging & Stamping Technology

基　　金：国家科技支撑计划资助项目(2011BAG03B02)

摘　　要：采用LS-DYNA软件,对汽车前防撞梁的热成形工艺进行数值模拟分析,计算了在两种摩擦条件下热成形过程中零件的温度场、应力场、减薄率和FLD,预测了零件的成形性能。根据模拟结果开发了热成形模具,冲压出热成形前防撞梁零件,将数值模拟结果和试验结果进行对比,两者基本吻合,变化趋势相同。结果显示,摩擦状态对热成形工艺的成形性能影响较大。LS-DYNA software was adopted to conduct numerical simulation analysis of hot stamping for front bumper. The temperature field distribution, stress field distribution, reduction rate distribution and FLD in the course of hot stamping under the two types of friction conditions were calculated, and the formability of parts was predicted. Based on the simulation, the hot stamping mould was developed, and the front bumper components of hot forming were stamped. Compared the test results with the simulation, both the results coincide basically with same variation trend. The results show that the friction state has a great impact on formability of hot stamping technology for parts.

关 键 词：热成形 前防撞梁 数值模拟 

分 类 号：TG306[金属学及工艺—金属压力加工] U463.326[机械工程—车辆工程]