- 专利标题: METHOD FOR PRODUCING BEARING RING AND METHOD FOR PRODUCING DOUBLE ROW TAPERED ROLLER BEARING
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申请号: US15771892申请日: 2016-10-12
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公开(公告)号: US20180320737A1公开(公告)日: 2018-11-08
- 发明人: Michio HORI , Hideto TORISAWA , Hiroshi YUKI , Chikara OHKI , Kazuhiro YAGITA
- 申请人: NTN CORPORATION
- 优先权: JP2015-213090 20151029
- 国际申请: PCT/JP2016/080239 WO 20161012
- 主分类号: F16C19/38
- IPC分类号: F16C19/38 ; F16C33/62 ; F16C33/64 ; F16C43/04 ; C21D1/10 ; C21D1/28 ; C22C38/22 ; C22C38/44 ; C21D9/40 ; C21D7/06
摘要:
A method for producing a bearing ring of a double row tapered roller bearing includes the steps of: preparing a formed body; forming a heated region; cooing; and removing. In the step of forming a heated region, an induction heating coil arranged to face part of the groove and induction-heating the fixated body is relatively rotated along the circumferential direction of the groove to form a heated region including the bottom surface of the groove and heated to a temperature of at least an Al point. In the cooling step, the whole of the heated region is simultaneously cooled to a temperature of not more than an Ms point. After the step of forming a heated region before the step of cooling, the method further includes the step of retaining the formed body in a state where heating is stopped.
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