Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Clamp structure constitutes sole initial metal-deforming...
Patent
1999-03-03
1999-12-07
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Clamp structure constitutes sole initial metal-deforming...
72306, 72319, B21D 504
Patent
active
059963891
ABSTRACT:
A processing machine for plate-like workpieces, especially a bending machine, which has a strip-like vise holder (5) as a workpiece support for supporting the workpiece (1) to be processed and a hold-down device (3) which is subdivided into individual segments (4) which are movable relative to one another in the direction of the bending line, and preferably are also interchangeable in order to be able to be adaptable to differing dimensions and shapes of the workpiece (1) to be processed. In this way, the edges (1a) on a workpiece (1) can be bent such that they can form undercuts, but the separation of this workpiece (1) so processed from the hold-down device (1) nevertheless remains possible. In order here to be able to select almost any desired segments (4) of the hold-down device (3) for a movement, while other segments (4) are not to be displaced, a single coupling element (9) is continuously adjustable in the direction of the bending line for such a group of segments (4), and has a coupling driving unit (13) for engagement into a corresponding matching coupling, preferably a recess (14 and/or 39) on the segment (4) in question, so that the construction of segments (4) is very simple from the perspective of production and construction, and no special measures in reference to segments (4) are necessary for executing a displacing movement.
REFERENCES:
patent: 4722214 (1988-02-01), Hayashi et al.
patent: 4930332 (1990-06-01), Hongo
Office Action for German priority Application No. 196 36 463.9 dated Apr. 3, 1997.
International Preliminary Examination for related PCT Application No. PCT/EP97/04006.
*Patent Abstract of Japanese Patent JP 61103626 (in English).
International Search Report for related PCT Application No. PCT/EP97/04006 and English translation.
Crane Daniel C.
EHT Werkzeugmaschinen GmbH
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