| Original document(16 pages) Authorized document(16 pages) 中文版 |
There is provided a method for manufacturing an external gear with a maintained high quality at low cost, which maintains a lubricated state of tooth flanks of the external gear with smaller manufacturing steps than the conventional method. The method for manufacturing an external gear internally in mesh with an internal gear inside the internal gear includes: a cold forging step of setting a material 80 in a lower cold forging die 100 having a tooth profile forming part 102 on an inner periphery of a circular recess 101 thereof, and pressing the material 80 so as to extend outward in the radial direction in order to form the material into a disc 81 and simultaneously, form an external tooth profile on the outer periphery of the disc 81; and a punching step of punching the disc 81 to form holes 11, 15, 17 required for constituting a power transmission mechanism. The surface roughness of the tooth flanks due to the cold forging is maintained on the completed product. |
Application Number
申请号 |
02148241 |
Application Date
申请日 |
2002.09.13 |
| Title 名称 |
Outer gear manufacture method |
Publication Number
公开号 |
1405469 |
Publication Date
公开日 |
2003.03.26 |
| Approval Pub. Date |
2005.04.27 |
Granted Pub. Date |
2005.04.27 |
| International Classification 分类号 |
F16H55/17 |
Applicant(s) Name
申请人 |
Sumitomo Heavy Industries, Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Nakashima Seiko |
| Attorney & Agent 代理人 |
huang jianfeng |
| More information 更 多 信 息 |
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