Flaring die with stress relief features
US6497132B1 · kind B1 · utility
2Cited by
16References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Aug 10, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D39/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pipe flaring die has a central opening with a profile configured to reduce stress concentrations at the base of the flared portion of the pipe. The profile includes an annular relief area intermediate an annular gripping surface and an annular beveled portion which defines the angle of the flared portion. The relief area provides a longer transition distance for the formation of the flared portion which results in a reduced residual stress concentration created at the base of the flared portion during the forming process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.