发明授权
- 专利标题: Method of redrawing metal cup
- 专利标题(中): 减少金属杯的方法
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申请号: US611636申请日: 1990-11-13
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公开(公告)号: US5105645A公开(公告)日: 1992-04-21
- 发明人: Tomomi Kobayashi , Akira Kobayashi , Katsuhiro Imazu
- 申请人: Tomomi Kobayashi , Akira Kobayashi , Katsuhiro Imazu
- 申请人地址: JPX Tokyo
- 专利权人: Toyo Seikan Kaisha, Ltd.
- 当前专利权人: Toyo Seikan Kaisha, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX1-292457 19891113
- 主分类号: B21D22/20
- IPC分类号: B21D22/20 ; B21D22/22 ; B21D22/24 ; B21D24/00 ; B21D51/26
摘要:
Disclosed is a method of redrawing a metal cup, in which an annular working member is used together with a redrawing die, a redrawing punch and a cup-shaped holding member, and this annular working member has a working face having an inner diameter smaller than the outer diameter of a preliminarily drawn cup to be redrawn. If redrawing is carried out by using this annular working member, the thickness of the drawn cup can be uniformly and sufficiently reduced without damaging a metal sheet of the preliminarily drawn cup or a coating layer thereof.
公开/授权文献
- US5689457A Semiconductor Memory 公开/授权日:1997-11-18
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