Annular component fabricating method, die for use in such fabricating method and annular component fabricated thereby
US7530251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2006 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Jul 5, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D53/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of fabricating an annular component part is disclosed wherein press forming is carried out to prepare an annular body having a cylindrical wall, having a root portion and a distal end, and an annular flange portion. The fabricating method comprises expanding an inner circumferential periphery of the cylindrical wall to an inner diameter corresponding to an inner diametric concave portion formed on the inner circumferential periphery and squeezing the cylindrical wall in a tapered profile such that the inner diameter of the cylindrical wall gradually decreases. During inner diametric expanding operation, an annular shoulder is formed on the inner circumferential periphery of the cylindrical wall and plays a role as an undercut of the annular component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.