弯曲半径对凸曲面翻边成形及回弹影响的研究  

Influence of the surface curvature radius on the springback in the convex surface flanging

作　　者：李军[1] 欧云龙 夏则良 

机构地区：[1]合肥工业大学机械与汽车工程学院,安徽合肥230009

出　　处：《模具技术》2015年第2期5-9,24,共6页Die and Mould Technology

基　　金：马鞍山市高端装备制造和新能源汽车技术创新服务平台(11Z0201025)

摘　　要：影响曲面翻边成形回弹的因素主要有零件弯曲曲率半径R、凹模圆角半径r以及材料的厚度t,利用Dynaform软件重点模拟零件弯曲曲率半径R对压缩类翻边中的凸曲面直线翻边的成形回弹影响,得出了零件弯曲曲率半径R对曲面翻边的成形回弹影响规律。通过计算机数值模拟得到在R30mm、R45mm和R60mm 3种半径下的成形极限图以及回弹前、后的主应变分布图,并结合试验的结果,得到随着弯曲半径增大而成形的回弹有所改善的结论。During flanging process ,the main factors which can affect the springback general‐ly include the curvature radius R of the part ,the die radius r and the material thickness t .On the basis of the Dynaform software ,the straight flanging process on convex surface is simula‐ted and the influence of the part curvature radius R is investigated in this paper .T he flanging simulations and experiments for the parts with the curvature radii of 30 mm ,45 mm and 60 mm are carried out ,and the FLD ,the strain distributions before and after springback and the experimental results are also analyzed .The simulations and experiments show that the springback reduces with the increase of the part curvature radius .

关 键 词：曲面翻边 成形 回弹 弯曲半径 DYNAFORM 

分 类 号：TG386[金属学及工艺—金属压力加工]