Die crowning apparatus for press brake

Details Die crowning apparatus for press brake Die crowning apparatus for press brake

1987-03-24

1988-03-22

Spruill, Robert L.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

77446, 100 46, B21D 502

Patent

active

047320320

ABSTRACT:
To crown (deform into a convex state) a die for a press brake (bending press), a number of a pair of upper and lower wedges are arranged between the lower die and the lower table at intervals along the longitudinal direction of the press brake, and simultaneously moved in the lateral direction by an elastic member (plate spring) fitted to each bottom groove formed in the lower wedge. Both free ends of the elastic member is moved by elastic member adjusting means including two sprocket wheels, two tubular nut members, a control motor, etc. To provide a smooth wedge slidable motion, springs are disposed to urge the lower die upward together with a lower die base.

REFERENCES:
patent: 3587286 (1971-06-01), Fritsch
patent: 3965721 (1976-06-01), Roch
patent: 4426873 (1984-01-01), Pearson et al.
patent: 4449389 (1984-05-01), Cros
patent: 4586361 (1986-05-01), Reinhorn et al.

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