摘要
基于大型薄壁瓜瓣构件充液拉深现场实验结果,分析了缺陷产生的原因,由于瓜瓣大端角部局部区域拉力不足,材料流料量过大产生了缺陷,其无法单纯依靠整体调整工艺参数解决。针对缺陷产生的原因,提出了3种模具拉延筋优化方案并分别进行了模拟,对比分析了3种方案的流料和起皱情况。结果表明,方案3在解决大端角部起皱的基础上,整体成形效果更优。最终确认方案3为最优方案,并进行了现场生产,与模拟结果一致,通过模具拉延筋优化,解决了瓜瓣构件充液拉深成形过程易出现的局部起皱及拉裂缺陷,获得了合格产品。
Based on the field experiment results of hydraulic drawing for large thin-walled scalloped segment,the reason of the defect was analyzed. Because of the insufficient local pulling force at large end corner of scalloped segment and excessive material flow,the defects could not be solved simply by adjusting the technological parameters as a whole. According to the above reasons of defects,three kinds of die optimization schemes were proposed and simulated respectively,and material flow and wrinkle were compared. The results show that on the basis of solving the wrinkling of the large end corner,scheme 3 is better on the overall forming effect. Finally,scheme 3 was regarded as the best scheme and field production was carried out,which was consistent with the simulation result. The local wrinkling and cracking defects of scalloped segment in hydraulic drawing process were solved by die optimization,and the qualified products were obtained.
作者
田恕
张杰刚
李倩
杨声伟
于弘喆
郎利辉
Tian Shu;Zhang Jiegang;Li Qian;Yang Shengwei;Yu Hongzhe;Lang Lihui(Tianjin Long March Launch Vehicle Manufacturing Co.,Ltd.,Tianjin 300462,China;Tianduan Aviation Technology Co.,Ltd.,lianjin 300232,China;School of Mechanical Engineering and Automation,Beihang University,Beijing 100191 ,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2019年第3期77-82,共6页
Forging & Stamping Technology
基金
天津市科技计划项目(17YFZCGX00530)
关键词
拉延筋
椭球瓜瓣
充液拉深
起皱缺陷
仿真分析
drawbead
ellipsoidal scalloped segment
hydraulic drawing
wrinkle defect
simulation analysis
