Device for bending a hollow section with a hold down clamp
US6023956A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1998 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Jul 31, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D53/74
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus (1) serves to bend a hollow section (2) with which a spacer frame for insulating glass sheets is to be manufactured. For this purpose, the hollow section (2) can already be filled with drying agent during bending or, however, still be empty. The bending apparatus also has, in addition to a bending tool (11) and an abutment (13), a hold-down clamp (17) for impinging upon a side band (6) and/or a flange (10) whose cross section continues internally, and parallel thereto a support (16), so that the external proportions of the hollow section (2) remain precisely preserved even in the bending area (4). In order to support thereby the bending motion and the deformation, as well as the flow of the material of the hollow section (2) and its side bands (6)/flanges (10), the hold-down clamp (17) is subdivided and has an element (171) co-rotatable with the bending motion in the bending direction, which supports the change of direction of the side band (6)/flange (10) during the bending operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.