軌道輪および転がり軸受の製造方法

Japanese Patent JP5773349

B2

To provide a method for manufacturing a bearing ring and a rolling bearing, which can uniformly form a quench-hardened layer on the whole rolling face along the perimeter by induction hardening while suppressing a manufacturing cost of a quenching apparatus.

The method for manufacturing the bearing ring of the rolling bearing includes: a step (S10) of preparing a molded body which is constituted by steel; a step (S30) of relatively rotating an induction heating coil along the circumferential direction of an annular region, which is arranged so as to face to a part of the annular region that becomes the rolling face of the bearing ring in the molded body and induction-heats the molded body, and forming an annular heated region which has been heated to a temperature of a point A1or higher in the molded body; and a step (S40) of cooling the whole heated region at the same time to a temperature of a point MSor lower. In addition, an induction heating coil which is used in the step (S30) of forming the heating region has a shape in which a region that faces to the annular region and contributes to the heating of the annular region is contained in the same flat surface.

COPYRIGHT: (C)2011,JPO&INPIT

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Riki Oki
Kazuhiro Yagita
Takashi Yuki

JP2009273386A

September 02, 2015

December 01, 2009

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ntn corporation

C21D9/40; B24C1/00; C21D1/10; C21D7/06; C22C38/00; C22C38/22; C22C38/44; F16C33/62; F16C33/64

JP2008303402A
JP60145324A
JP4000349A
JP2004100946A
JP2009156295A
JP2009197312A
JP2005133123A
JP2004044802A

Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Masayuki Sakai
Nobuo Arakawa
Masato Sasaki

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