Method for working input shaft for toroidal-type continuously variable transmission
US6374477B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Aug 4, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H9/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
After heat treatment for hardening the outer peripheral surface of the input shaft 15 is enforced, a straightening operation for straightening the bent portions of the input shaft 15 caused by the heat treatment is carried out prior to formation of the through holes 17, 17. After then, the input shaft 15 is machined using electric sparks to thereby form the through holes 17, 17 in the input shaft 15. In the present working method, there is eliminated the possibility that, during the straightening operation, stresses can concentrate in the through holes 17, 17 portions of the input shaft 15, thereby being able to attain the above object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.