Title:
METHOD FOR MANUFACTURING RING MEMBER FOR BEARING, AND MOLD FOR INVERSION WORKING
Document Type and Number:
WIPO Patent Application WO/2023/095701
Kind Code:
A1
Abstract:
This method for manufacturing a ring member for a bearing comprises an inversion step, in which a ring-shaped workpiece member is clamped and deformed using a punch that is positioned on a first side in a prescribed direction and a die that is positioned on a second side. The punch has a first R surface that is formed in a circular arc shape. The die has a second R surface that is formed in a circular arc shape, and a taper surface that is slanted relative to the prescribed direction. The inversion step includes a first step, in which the punch and the die are used to deform the workpiece member while the first R surface and the second R surface are in contact with the workpiece member, and a second step, in which the punch and the die are used to deform the workpiece member while the first R surface and the taper surface are in contact with the workpiece member.
Inventors:
TEZUKA KENJI (JP)
HAGIWARA NOBUYUKI (JP)
HAGIWARA NOBUYUKI (JP)
Application Number:
PCT/JP2022/042608
Publication Date:
June 01, 2023
Filing Date:
November 16, 2022
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B21D22/26; B21D22/28; B21D53/16; B21K21/06
Foreign References:
| JP2009226422A | 2009-10-08 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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