微細精密せん断における偏心クリアランス是正作用に及ぼす
パンチ長さ及び板押えの影響

抄録

For the clearance compensation effect under an unbalanced clearance condition, the effect is related to not only the horizontal force but also the shearing force. At various stages of the design of tool sets, punch length and blankholder condition are important factors. In this paper, we discuss the influences of punch length and blankholder condition on the compensating mechanism through the elastic-plastic finite element method. The results of this study clarified the following. The clearance compensation effect depends on the horizontal force and the shearing force even if the punch length and blankholding condition are varied. When the punch length becomes long using a blankholder, the effect is enhanced. Though, the increasing rate of the effect becomes small with punch length. The use of a blankholder strengthens the effect owing to the bending moment by the shearing force.