马鞍面件多道次多点模具成形数值模拟  

Numerical simulation on the process of saddle surface multi-step multi-point die forming

作　　者：刘伟[1] 李海平[1] 李明哲[2] 

机构地区：[1]河南工业大学机电工程学院,郑州450007 [2]吉林大学辊锻工艺研究所,长春130022

出　　处：《机械设计与制造》2009年第2期242-244,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(50275063)

摘　　要：通过对马鞍面件多道次多点模具成形的有限元数值模拟,阐述了多道次多点模具成形数值模拟的关键技术,并与单工步多点模具成形进行比较,分析了马鞍面件的成形过程,研究了不同曲率半径步长对成形结果的影响。结果表明:多道次多点模具成形与单工步多点模具成形相比改善了板材的受力状况,达到了消除变形集中的目的;多道次多点模具成形时,随着曲率半径步长的减小,板料厚度分布越来越均匀,不易形成集中失稳。By the finite element numerical simulation of multi-step multi-point die forming for saddle surface,its key technology was represented,and by comparing with single-step forming,the forming process was analyzed. In addition,it was studied that influence of different curvature radius step length upon forming result. The simulation results show that the multi-step forming cart improve the stress of sheet metal and avoid stress concentration;in multi-step forming,smaller the curvature radius step length is, more uniform the thickness distribution of sheet metal is ,and destabilization is not caused easily.

关 键 词：多道次多点模具成形 数值模拟 起皱 单工步 曲率半径步长 

分 类 号：TH16[机械工程—机械制造及自动化] TG306[金属学及工艺—金属压力加工]