Title:
内歯車の成形方法
Document Type and Number:
Japanese Patent JP4069735
Kind Code:
B2
Abstract:
At the time for forming an internal gear from a raw material 2 of an internal gear, first, the raw material 2 is externally inserted onto a forming die 3 and fixed to the forming die 3 through a pressing die 4. Next, a forming roll 5 is moved in a direction as indicated by an arrow B of FIG. 6 while rotating the forming die 3. By this, the inner peripheral surface of the raw material 3 is pressed against an outer gear part 3b formed on the outer peripheral surface of the forming die 3 so that an internal gear part 1c is formed on the inner peripheral surface of the raw material 2. The rotating direction of the forming die 3 is selected such that the first end part of the outer gear part 3b located on the front side in the feeding direction of the forming roll 5 is moved ahead in the rotating direction (the direction as indicated by an arrow A of FIG. 6) of the second end part located on the rear side in the feeding direction of the forming roll 5.
Inventors:
Yukio Wada
Hirofumi Okuda
Nakamura Yasufumi
Akinao Minegishi
Hirofumi Okuda
Nakamura Yasufumi
Akinao Minegishi
Application Number:
JP2002352198A
Publication Date:
April 02, 2008
Filing Date:
December 04, 2002
Export Citation:
Assignee:
JTEKT Corporation
International Classes:
B21H5/02; B21D53/28; B21H5/00
Domestic Patent References:
| JP2000071041A | ||||
| JP11030310A |
Attorney, Agent or Firm:
Noboru Watanabe