冲头尺寸对多点拉形效果影响的数值模拟  

Numerical simulation on the effect of punch element size on multi-point stretch-forming results

作　　者：王少辉[1] 蔡中义[1] 李明哲[1] 李湘吉[1] 

机构地区：[1]吉林大学辊锻工艺研究所,长春130022

出　　处：《吉林大学学报（工学版）》2009年第3期619-623,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50775098);吉林大学'985工程'项目

摘　　要：对典型件的多点拉形过程进行了系统的数值模拟研究,分析了其表面精度和形状误差。结果表明,冲头尺寸越小,零件表面质量越好。不同材料的成形件形状误差分布基本相似。目标形状的曲率越大,成形件的形状误差越大。成形误差随着冲头尺寸的变小而减小,当冲头尺寸比较大时,误差减小的速度较快,而当冲头尺寸小于一定值以后,误差减小的速度逐渐变缓。A series of numerical simulations on the typical multi-point stretch-forming(MPSF) processes were carried out,the surface quality and shape error of the MPSF parts were analyzed.The results showed that the smaller the size of the punch is,the better the surface quality will be.The shape error distributions on the MPSF parts with different materials are similar.The larger the curvature of the target shape is,the larger the shape error will be.With the decrease of the punch size,the shape error of the MPSF pa...

关 键 词：材料合成与加工工艺 板料 多点拉形 冲头压痕 形状误差 成形精度 

分 类 号：TG386[金属学及工艺—金属压力加工]