公开(公告)号：US20070006628A1

公开(公告)日：2007-01-11

申请号：US10542686

申请日：2004-04-16

Applicant: Youichi Tabei ,  Takashi Araki ,  Shinji Kouno ,  Shoichi Yanaoka ,  Takashi Miura

Inventor： Youichi Tabei ,  Takashi Araki ,  Shinji Kouno ,  Shoichi Yanaoka ,  Takashi Miura

IPC: B21D22/00

CPC classification number: B21K21/02 ,  B21J5/06 ,  B21K1/28 ,  B21K1/30 ,  B21K1/76 ,  B21K21/00

Abstract: A material member blanked from metal sheet is subjected to upsetting to form an annular peripheral portion that is thinner than the center part of the material inside the annular portion, and the thicker inside portion is formed into a concavity. The first intermediate product thus formed is drawn to form a cup-shaped case with an internal boss and/or an external boss, and an outside flange. The intermediate product can also be used to make gears and the like.

Abstract translation: 从金属片冲裁的材料构件受到镦锻以形成比环形部分内的材料的中心部分薄的环形周边部分，较厚的内部部分形成为凹面。 将如此形成的第一中间产品拉成形成具有内部凸台和/或外部凸起的杯形外壳和外部凸缘。 中间产品也可用于制造齿轮等。