Title:
PROCESS OF MANUFACTURE OF BEARING RING
Document Type and Number:
Japanese Patent JP2016153666
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a process of manufacture of a bearing ring of which manufacturing step is more shortened.SOLUTION: This invention comprises the steps of preparing a steel material 2 and a formation block press 3 for attaining a bearing ring 11 from the steel material 2; mounting the steel material 2 on the formation block 3, after the steel material 2 is heated at the formation block 3 to a temperature equal to or more than a transformation point A; punching out a part of the steel material 2 into a ring-shape; then hardening and processing the ring-shape steel material 2 at the formation block 3 to attain the bearing ring 11. At the stage for attaining the bearing ring 11, both heating and punching-out are carried out under a state in which a tension force is added in at least one direction along the surface of the steel material 2 in respect to the steel material 2.SELECTED DRAWING: Figure 5
Inventors:
MIZUTA KOHEI
OKI TSUTOMU
OKI TSUTOMU
Application Number:
JP2015031556A
Publication Date:
August 25, 2016
Filing Date:
February 20, 2015
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C33/64; B21D1/05; B21D24/16; B21D25/02; B21D25/04; B21D28/00; B21D28/02; B21D37/16; B21D53/10; C21D9/40; F16C19/30; F16C19/46
Domestic Patent References:
| JP2013164093A | 2013-08-22 | |||
| JP2002503788A | 2002-02-05 | |||
| JP2007170447A | 2007-07-05 | |||
| JPH1058073A | 1998-03-03 | |||
| JPH08284951A | 1996-11-01 | |||
| JPH0754852A | 1995-02-28 | |||
| JP2003334629A | 2003-11-25 | |||
| JPH09176740A | 1997-07-08 |
Foreign References:
| US4462144A | 1984-07-31 |
Attorney, Agent or Firm:
Fukami patent office
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