Manufacturing method of steel ball for rolling bearing |
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| 申请号 | EP02014237.8 | 申请日 | 2002-06-26 | 公开(公告)号 | EP1270142A3 | 公开(公告)日 | 2003-05-02 |
| 申请人 | KOYO SEIKO CO., LTD.; | 发明人 | Fujita, Yoshiki; Tazumi, Hajime; Nishikita, Kazuyuki; Yoshida, Hideji; | ||||
| 摘要 | A method of manufacturing a steel ball for a rolling bearing, said method comprising: a molding step of forming a steel wire cut at a predetermined length into a raw ball having a band portion by a pair of molding forms having respectively hemispherical concave portions and relief grooves in peripheries of said concave portions on their respective opposing faces, said band portion being formed on a surface of said raw ball along said relief grooves by compressing said steel wire by said molding forms in a state in which both ends of said steel wire are sandwiched between said concave portions; and a tumbler working step of removing said band portion from the surface of the raw ball by tumbling. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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