摘要
分析并研究了某铝制异形盒的多道次深拉深与变薄拉深工艺,利用板料冲压模拟专用软件PAMSTAMP 2G对零件的成形过程进行了有限元仿真,校验各道次坯料尺寸及模具形状是否合理,根据预测的成形缺陷对原拉深工艺进行改进,优化了工艺参数且减少了拉深道次。最后设计出7道次成形模具,并试冲获得合格零件。在此基础上对比仿真及试验数据,发现两者较为吻合,证明采用实体壳单元作为板料模拟盒形件的多道变薄拉深能够更加精确地预测包含厚度大变形的冲压过程。
Multistage deep drawing and ironing processes of an irregular cup were analyzed. By using the software PAMSTAMP 2G, a software was written for digital simulation of sheet metal forming, and finite element simulation in multistage deep drawing process was carried out to check out the rationality of the blank and tools' dimensions at each stage. Based on the predominant defects predicted by the simulation, the whole process was improved and the process parameters were optimized. A series of multistage deep drawing and ironing experiments were conducted after optimization. A comparison between numerical and experimental results was presented, and it demonstrates that the optimal irregular cups can be obtained with finite element method incorporated with solid shell elements.
出处
《机械科学与技术》
CSCD
北大核心
2009年第5期622-626,共5页
Mechanical Science and Technology for Aerospace Engineering
关键词
异形盒
多道次深拉深
变薄拉深
有限元仿真
优化
实体壳
irregular cup
multistage deep drawing
ironing
finite element simulation
optimization
solid shell elements