基于Dynaform的浅球壳冲压成形及回弹研究  

Stamping forming and springback of shallow spherical shell based on Dynaform

作　　者：杨文华[1] 吉卫[1] 吴刚[1] 郝爱国[1] 赵建斌[1] 李西云 Yang Wenhua;Ji Wei;Wu Gang;Hao Aiguo;Zhao Jianbin;Li Xiyun(Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院机械制造工艺研究所

出　　处：《锻压技术》2018年第9期41-46,共6页Forging & Stamping Technology

基　　金：中国工程物理研究院精密实验室资助项目(K848-13-JSS)

摘　　要：针对浅球壳零件冲压过程中可能存在的起皱、回弹等缺陷,借助Dynaform软件对浅球壳的冲压过程和回弹进行了有限元仿真分析。首先,对比了不同润滑、不同压边力条件下的成形情况,当摩擦系数为0.1时,需要压边力为600 kN才不会内皱,当摩擦系数为0.2时,需要压边力为200 kN才不会内皱。并且得到最优坯料的外径为φ440 mm,壁厚为2.05 mm。其次,对浅球壳冲压进行了回弹分析,发现其口部回弹最大,回弹量为0.805 mm。最后,在仿真分析的基础上进行了回弹逆向补偿,并进行了实际冲压试验,其结果与有限元模拟结果基本吻合。研究表明,仿真分析可以为浅球壳的冲压成形及工艺参数优化提供依据,降低了生产成本,提高了设计生产水平。Aimed at the possible wrinkles,springback during the forming process of shallow spherical shell,the stamping process and spingback of shallow spherical shell were simulated and analyzed by software Dynaform. First of all,the forming conditions under different lubrication conditions and different blank holder forces were compared,when the friction coefficient was 0. 1 and 0. 2,the internal wrinkle was not occurred on the premise that the blank holder force was above 600 k N and 200 k N respectively. Then,the optimum blank wasΦ440 in diameter and 2. 05 mm in thickness. Secondly,the springback analysis of shallow spherical shell was carried out,and the largest springback amount 0. 805 mm was found at its aperture. Finally,the springback compensation was conducted on the basis of simulation analysis,and the actual stamping test was carried out which were in good agreement with the finite element simulation results. The results show that the simulation analysis can provide the basis for the stamping and the optimization of process parameters of shallow spherical shell and reduce the production cost and improve the design level.

关 键 词：浅球壳 冲压成形 回弹预测 数值模拟 压边力 

分 类 号：TG386[金属学及工艺—金属压力加工]