Device for bending a hollow section with a hold down clamp

Details Device for bending a hollow section with a hold down clamp Device for bending a hollow section with a hold down clamp

1998-07-31

2000-02-15

Tola, Ed

Metal deforming

By use of roller or roller-like tool-element

Comprising tool movable relative to stationary work-portion...

72219, 72316, 72322, B21D 702

Patent

active

060239565

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.

REFERENCES:
patent: 4938050 (1990-07-01), Kimura
patent: 5220818 (1993-06-01), Hansen
patent: 5640828 (1997-06-01), Reeves et al.
patent: 5705010 (1998-01-01), Larsen
patent: 5794481 (1998-08-01), Lisec
Search Report dated Jul. 12, 1999 for corresponding European Application No. EP 98 11 3861.

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