斜壁矩形盒件多点拉深成形的数值模拟  

Numerical simulation on Multi-point draw forming process for pyramid boxes

作　　者：刘伟[1] 汪晓光[2] 李明哲[3] 

机构地区：[1]河南工业大学机电工程学院,郑州450007 [2]机械科学研究总院,北京100044 [3]吉林大学辊锻工艺研究所,长春130022

出　　处：《机械设计与制造》2010年第1期137-139,共3页Machinery Design & Manufacture

基　　金：国家自科学基金资助项目(50275063)

摘　　要：通过对斜壁矩形盒件多点拉深成形的有限元数值模拟,分析了成形过程中起皱与拉裂缺陷的产生,研究了四种不同压边力加载曲线即恒压边力、↘形压边力曲线、V形压边力曲线、■形压边力曲线对成形结果的影响。结果表明:斜壁矩形盒件在整个多点拉深成形过程中,在宽度方向的侧壁底部极易发生破裂缺陷,在法兰直边对称轴处起皱最严重;不同的压边力曲线对斜壁矩形盒件多点拉深最终成形结果的影响很大,其中■形状的压边力加载曲线最有利于斜壁矩形盒件的多点拉深成形。By the finite element numerical simulation of multi-point draw forming for pyramid boxes, the generation of wrinkling and fracture in the process of forming was analysed,and draw forming results were compared by five different blank holder loading curves which are constant,↓ V, ] pressure-pad-force. The results show that,in multi-point draw forming process for pyramid boxes ,the crack is easy to generate at bot- tom of sides in width direction,and wrinkling defect is most serious at symmetry axis in straight flanges; different blank holder loading curve have a very large effect on the forming results,the blank holder loading curve with ] shape has the best advantage to Multi-point draw forming results f or pyramid boxes.

关 键 词：多点拉深成形 数值模拟 起皱 拉裂 压边力加载曲线 

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]