Holding-down arrangement for a deep-drawing press

Details Holding-down arrangement for a deep-drawing press Holding-down arrangement for a deep-drawing press

1977-03-07

1978-10-24

Gilden, Leon

Metal deforming

Process

Tube making or reshaping

72361, 91 4R, B21D 2200

Patent

active

041214498

ABSTRACT:
The invention relates to a holding-down apparatus for a deep-drawing press. It is known for the deep-drawing of particularly heavy platines that the holding-down of the platine by the holding plate is of very great significance for the quality of the workpiece. The setting of the respective correct holding-down forces is decisive for whether the workpiece is flat and without folds or tears at the drawing flange and at the deformation zone when it comes out of the deep-drawing press. A too high holding force hinders the reduction of the workpiece diameter which is derived from the stroke of the deep-drawing and overloads therefore the vicinity of the border of the deformation zone. A too low holding-down force leads to the formation of folds.

REFERENCES:
patent: 2403912 (1946-07-01), Doll
patent: 2916017 (1959-12-01), Lamb
patent: 3286496 (1966-11-01), Burk
patent: 3532017 (1970-10-01), Schleeter
patent: 3664172 (1972-05-01), Cuacho
patent: 3668914 (1972-06-01), Abudemcherkaza
patent: 3908496 (1925-09-01), Moelbert

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