多点冲头主动加载路径对薄板拉形的影响
刘纯国
, 刘伟东, 邓玉山
Effect of multi-point punch active loading path on the stretch-forming of sheet
LIU Chun-guo
, LIU Wei-dong, DENG Yu-shan
等差曲率冲头主动加载拉形中间过程