- 专利标题: Method for producing a sintered porous bearing and the sintered porous bearing
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申请号: US903734申请日: 1997-07-31
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公开(公告)号: US6049983A公开(公告)日: 2000-04-18
- 发明人: Motohiro Miyasaka , Toshikazu Takehana
- 申请人: Motohiro Miyasaka , Toshikazu Takehana
- 申请人地址: JPX Chiba
- 专利权人: Hitachi Powdered Metal Co. Ltd.
- 当前专利权人: Hitachi Powdered Metal Co. Ltd.
- 当前专利权人地址: JPX Chiba
- 优先权: JPX8-220654 19960802
- 主分类号: F16C33/10
- IPC分类号: F16C33/10 ; B22F3/11 ; B22F3/24 ; B22F5/00 ; B30B11/02 ; F16C33/12 ; F16C33/14 ; B23P15/00
摘要:
A cylindrical sintered material is placed in a cavity composed of die, a core disposed in the center of the die, and a pair of upper and lower punches provided within the die and compressed by the upper and lower punches. A gap is provided between an internal circumferential portion of the sintered material and an external circumferential portion of the core. Consequently, when the sintered material is compressed, plastic flow is produced at both ends of the sintered material so that an internal circumferential portions at corresponding portions protrude inward in a radius direction till the internal circumferential portions come into contact with the core, so that slide portions are formed.