Method and apparatus for manufacturing straight or inclined toothed machine elements, especially spur gears by cold working
US4116032A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Jun 15, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21H5/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of, and apparatus for, manufacturing straight or inclined toothed machine elements, especially spur gears, by cold working, which comprises holding under axial prestress a single gear-workpiece blank during a rolling or generating operation between two press punches at such a pressure that under the action of the rolling operation pressure stresses prevail between the press punches and the workpiece, these pressure stresses corresponding at least to the elastic limit of the workpiece material. Further, due to the simultaneous action of the prestressing force and the rolling operation there is formed at least at one of both end surfaces of the workpiece an end surface which is dispositioned exactly perpendicular to the axis of the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.