Drawing apparatus with blocking devices, detents and the like

Details Drawing apparatus with blocking devices, detents and the like Drawing apparatus with blocking devices, detents and the like

1998-06-25

2000-07-18

Larson, Lowell A.

Metal deforming

With means to drive tool

With means to selectably control movement of tool

100 53, B21D 2416

Patent

active

060890738

ABSTRACT:
A drawing apparatus in a press or similar forming system has a blank holder which can be acted upon by one or optionally several pressure cylinders. Blocking devices are provided which act, in one case, directly upon a pressure cheek supporting the blank holder and, in another case, indirectly upon the pressure cheek by way of an articulated train or transmission train. Thereby, an unintentional lifting or lowering of the blank holder is prevented when the press is inoperative.

REFERENCES:
patent: 2240630 (1941-05-01), Stacy
patent: 2357508 (1944-09-01), Ernst
patent: 2653560 (1953-09-01), Bradhering
patent: 4712412 (1987-12-01), Roos et al.
patent: 5099673 (1992-03-01), Baur

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