Method for producing shapes having circular corrugations
US4455852A · kind A · utility
5Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Jan 26, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D17/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Shapes with circular corrugations are produced by spinning a sheet metal blank under the action of oppositely directed deforming and backing forces. The blank is given the configuration of an envelope of revolution with a continuously diverging flare and is secured at the end nearest to the geometrical apex of the flare, and the circular corrugations are formed sequentially from the smaller towards the larger diameter by applying a concentrated deforming force to the inside surface of the blank, the deforming force being directed along the blank axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.