Method for producing slit hollow profiles
US8833128B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2013 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Dec 12, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D5/015
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for producing slit hollow profiles from a cut blank is provided, in which the hollow profile is produced from the essentially flat blank using rolling-up technology or using U-O-forming, so that the hollow profile has a slit in the axial direction along the abutting edges of the formed blank. Highly dimensionally stable, slit hollow profiles can be produced which can be easily joined to form closed hollow profiles, is achieved by the cut blank providing a circumferential length in the locally provided cross-sectional areas which is greater than the required forming length, so that when the cut blank is formed into a closed hollow profile the opposite edges of the formed cut blank abut on one another and when it is formed into the final shape at least the areas of the hollow profile abutting on the edge joint are at least partly compressed in the circumferential direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.