Title:
MANUFACTURE OF OUTER RACE FOR BALL BEARING
Document Type and Number:
Japanese Patent JP3436387
Kind Code:
B2
Abstract:
PURPOSE: To provide a method for manufacturing an outer race for ball bearing enable to obtain the outer race for ball bearing having excellent durability.
CONSTITUTION: After heating a columnar state billet 1 having a first prescribed height H forming plural metal flows 2 in the axial direction of the cross section, an upsetting is executed to manufacture a first upsetting processed material. Successively, after turning over the first upsetting processed material, the upsetting is again applied to manufacture a second upsetting processed matrial 5 having a prescribed height H2. Thereafter, by applying a vertically uniform center pressing, center punching and rolling work (V1) respectively, then the width upset is executed to manufacture the finish forging product 17 having a third prescribed height H3. Further, the upsetting ratio being the ratio of the decreasing quantity (H-H3) to the first prescribed hesight H of the columnar steel billet 1 is made to be 0.50-0.65.
Inventors:
Kenkichi Matsunaga
Tomio Inukai
Koichi Sakaguchi
Okitsu Traditional Collection
Yoshinori Hongo
Hiroyuki Sawai
Yoshikai High
Tomio Inukai
Koichi Sakaguchi
Okitsu Traditional Collection
Yoshinori Hongo
Hiroyuki Sawai
Yoshikai High
Application Number:
JP18071993A
Publication Date:
August 11, 2003
Filing Date:
June 25, 1993
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
Daido Steel Co., Ltd.
Omi Forging Co., Ltd.
Daido Steel Co., Ltd.
Omi Forging Co., Ltd.
International Classes:
B21H1/12; B21J5/08; B21K1/04; F16C33/64; (IPC1-7): B21K1/04; B21H1/12; B21J5/08; F16C33/64
Domestic Patent References:
| JP6170479A |
Attorney, Agent or Firm:
Toshihiko Watanabe