发明授权
- 专利标题: Hollow bearing ball and process for making them
- 专利标题(中): 中空轴承球及其制造方法
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申请号: US3660880D申请日: 1970-03-27
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公开(公告)号: US3660880A公开(公告)日: 1972-05-09
- 发明人: GLENN EDWARD R
- 申请人: EDWARD R GLENN
- 专利权人: Edward R Glenn
- 当前专利权人: Edward R Glenn
- 优先权: US2321870 1970-03-27
- 主分类号: B21D51/08
- IPC分类号: B21D51/08 ; B21D53/10 ; B21K1/02 ; B23P15/00 ; F16C33/32 ; B23P11/00 ; B21D39/02 ; B23P19/04
摘要:
A hollow bearing ball formed from a relatively resilient steel by initially stamping a round blank from a strip, drawing the blank, and forging and flowing the drawn blank of metal to subsequently form a substantially hemispherical portion of a hollow bearing ball. The hemispherical portions are fed into a hopper which serve to place them in opposed concave relationship after which they are interposed within and between two electrode welding seats which hold the hemispherical portions under pressure and weld them to form a hollow bearing ball.
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