发明授权
- 专利标题： Sheet-metal formed with spaced projections and manufacturing method of the same
- 专利标题（中）： 用间隔开的凸起形成的钣金及其制造方法
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申请号： US09814801申请日： 2001-03-23
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公开(公告)号： US06708543B2公开(公告)日： 2004-03-23
- 发明人: Naoki Yoshioka , Tsuyoshi Takahashi , Yuichi Yagami
- 申请人： Naoki Yoshioka , Tsuyoshi Takahashi , Yuichi Yagami
- 优先权： JP2000-082460 20000323
- 主分类号： B21D2602
- IPC分类号： B21D2602
摘要：
A sheet metal formed thereon with a number of spaced projections, wherein the projections are formed by the steps of positioning the sheet metal between a female die formed with a number of spaced recesses at one surface thereof and a male die formed with a concavity to be coupled with the female die and a number of spaced projections located at the bottom of the concavity to correspond with the recesses of the female die and pressing the sheet metal under existence of hydraulic fluid between the sheet metal and the concavity of the male die.