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公开(公告)号:US20060191389A1
公开(公告)日:2006-08-31
申请号:US11413591
申请日:2006-04-28
IPC分类号: B26D1/00
CPC分类号: B41J2/162 , B41J2/1433 , B41J2/1632 , Y10T29/494 , Y10T29/49401 , Y10T83/04
摘要: A punching apparatus forms a hole at a bottom portion of each of recesses which are formed in a metal plate in advance and arrayed in a first direction. A female die supports the metal plate. A male die is opposed to the recess and provided with a punch array in which a plurality of punches in the first direction. The male die is movable in a second direction perpendicular to the first direction to form the hole with each of the punches. The punches include first punches each having a distal end face which is slant in the second direction. A slant angle of the distal end face corresponds to a warp of the plate member due to the formation of the recesses.