发明授权
- 专利标题: Production of deep drawn pressings
- 专利标题(中): 生产深冲压力
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申请号: US3724247D申请日: 1971-05-27
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公开(公告)号: US3724247A公开(公告)日: 1973-04-03
- 发明人: PAGE C
- 申请人: ALCAN RES & DEV
- 专利权人: Alcan Res & Dev
- 当前专利权人: Alcan Res & Dev
- 优先权: GB2666270 1970-06-02
- 主分类号: B21D24/00
- IPC分类号: B21D24/00 ; B21D37/00 ; B21D28/18
摘要:
Wrinkle free deep drawn shells are formed from aluminium foil and other similar materials by employing a tapered die and a punch having a radially compressible elastic or hydropneumatic element at the nose end of the punch, such element having initial dimensions approximately equal to those of the die mouth.
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