发明名称 |
METHOD OF FORMING INTERNAL GEAR, AND INTERNAL GEAR |
摘要 |
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. <IMAGE> |
申请公布号 |
EP1486269(A4) |
申请公布日期 |
2007.04.04 |
申请号 |
EP20030703319 |
申请日期 |
2003.02.10 |
申请人 |
JTEKT CORPORATION |
发明人 |
WADA, YUKIO;OKUDA, HIROFUMI;NAKAMURA, YASUFUMI;MINEGISHI, AKINAO |
分类号 |
B21D53/28;B21H5/00;B21H5/02 |
主分类号 |
B21D53/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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