Apparatus and method for the stretch forming of elongated hollow metal sections
US5327764A · kind A · utility
26Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1993 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Apr 5, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D25/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Disclosed is apparatus and a method for the stretch forming of an elongated hollow metal section, such as an aluminum extrusion. The apparatus and method uses one or more constraining means secured to the forming die and a die extension to constrain and support the walls of the elongated hollow metal section against the forces produced by air pressure within the interior of the hollow metal section. The apparatus and methods disclosed herein prevent the formation of wrinkles, crimps and bulges in the walls of the elongated hollow metal section during the stretch forming and reshaping thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.