Rough machining of variable rack |
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| 申请号 | JP17566183 | 申请日 | 1983-09-22 | 公开(公告)号 | JPS6067023A | 公开(公告)日 | 1985-04-17 |
| 申请人 | Nissan Motor Co Ltd; | 发明人 | FUKUSHIMA CHIAKI; | ||||
| 摘要 | PURPOSE:To minimize deformation in finish machining and eliminate cutting of flow of work material by dividing teeth formed on a rack into an appropriate number of sections every approximate torsional angle and by making rough machining according to each average torsional angle of every section. CONSTITUTION:A body 5 is secured to a base 4 slid by a guide 3 and a holder 7 having a clamp 6 is provided on the body 5. And a material to be machined 11 is retained in the clamp 6 and opposed to the edge 8 of a broaching machine. To obtain a roughly machined work 1 having a center portion A with a large torsional angle theta1 and both end portions B, C with small torsional angle theta2, the clamp 6 retaining the material to be machined 11 is inclined to theta1 and the A portion is machined with the broach 8a of a first broaching machine, and inclined to theta2 and B and C portions are machined with the broach 8b of a second broaching machine arranged in parallel. After this rough machining, finish machining is made with a finish die. Then machining deformation is less and flow of work is not cut. If the number of sections is increased, a tooth shape closer to the complete product can be naturally obtained. | ||||||
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| 说明书全文 | |||||||
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