中国机械工程Issue(18)：2528-2532,2538,6.DOI:10.3969/j.issn.1004132X.2015.18.021
圆锥形凹模径向分块压边拉深工艺实验研究
Experimental Research on Deep Drawing Process Using Radial Segmental Blank Holders with Conical Die
摘要
Abstract
The forming limit could be improved by using the conical die in the deep drawing process when the blank was drawn to the shape accordant to the inside surface of the die.And the blank wrinkled easily during the large deformation process.A new technology combining the conical die with the radial segmental blank holding technique was proposed to improve the restrain conditions between the blank holders and the blank and to suppress the wrinkles.The drawing die were designed with the conical die and the rigid-flexible composite segmental blank holders and the experiments for the cylindrical cup deep drawing process were conducted using the conical dies with different die semi-cone angles.The results reveal that the wrinkles at the beginning of the drawing process can be overcame effectively by the new blank holding method with smaller conical angles.The forming limit coefficients for AA5754,AA6061 and 08AL are as 0.410,0.431 and 0.373 respectively,which are en-hanced effectively,adopting the die with 45°die semi-cone angle.The theoretical forming limit calcu-lation method for the deep drawing process with the conical die is given and the theoretical results are accordant with the experimental ones.关键词
圆锥形凹模拉深成形/径向分块压边/起皱/拉深成形极限Key words
deep drawing process with conical die/radial segmental blank holding/wrinkling/forming limit of deep drawing分类
矿业与冶金引用本文复制引用
孔晓华,秦泗吉,陆宏,郑星..圆锥形凹模径向分块压边拉深工艺实验研究[J].中国机械工程,2015,(18):2528-2532,2538,6.基金项目
国家自然科学基金资助项目(51175451) （51175451）
