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