Computer-controlled press brake

Details Computer-controlled press brake Computer-controlled press brake

1977-10-07

1979-04-10

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Sensing tool or tool-linked part

100 46, 100 48, B21D 502

Patent

active

041482034

ABSTRACT:
A computer-controlled hydraulic press brake includes an actuator and control system which automatically provides variable pre-programmable ram opening and closing strokes. A microprocessor within the control system responds to stroke parameters entered by the operator and an encoder-generated signal indicative of ram position to generate a velocity command signal defining a velocity profile for positioning the ram to the stroke limits. Closed-loop servo systems associated with each ram cylinder respond to the velocity command signal to cause movement of the ram in accordance with the velocity profile. A ram leveling circuit responsive to individual position sensors associated with respective sides of the ram compensates for ram tilt by simultaneously applying complimentary correction signals to the respective servo systems. A second velocity profile may be generated in response to stored parameters to position a back gauge concurrently with ram movement by means of a second motor drive servo system.

REFERENCES:
patent: 2958199 (1960-11-01), Anderson et al.
patent: 3044389 (1962-07-01), Rexford
patent: 3618349 (1971-11-01), Roch
patent: 3826119 (1974-07-01), Marotto
patent: 4062213 (1977-12-01), Schneider et al.

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