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US 4,314,185 AGranted
Control circuit for an automated press system
AssigneeL. Schuler GmbH
InventorsFranz Schneider, Burkhard Schumann
Life of this patent
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AssigneeL. Schuler GmbH
InventorsFranz Schneider, Burkhard Schumann
Estimating the term…
In automated press systems it is desirable to be able to control the actuators of an automation system associated with the press based on the speed of the press. To accomplish this, a circuit arrangement is provided which includes a pulse generator for producing a coded signal indicating the position of the press based on a press speed signal. An evaluation circuit having a parallel arrangement of a converter and a process control circuit receives these coded position signals. The outputs of the converter and process control circuit control the actuators of the automation system through pulse converters and positioning control circuits (e.g. speed and position control loops). Information as to the number of press strokes is also provided to the pulse converters through a generator. The converter can be an electronic curve shaper which controls the actuators when the press ram is moving, while the process control circuit can be a CNC control circuit which controls the actuators when the press ram is stopped.
A circuit arrangement for an automated press system having a press ram and a press automation system in which a pulse generator coupled to the press enables positioning control circuits via an evaluation circuit in dependence on the speed of operation of the press, said positioning control circuits driving actuators of the press automation system and the automation system following a predetermined operating charcteristic by moving up to programmable set points, the pulse generator produces directly-coded actuating signals indicative of the position of the press ram, that the evaluation circuit includes a converter in parallel with a process control circuit, the inputs of said converter and process control circuit coupled to the pulse generator output and the outputs of said converter and process control circuit being connected to one or more pulse converters for said actuators, that the pulse converters are fed with control pulses from a generator which detects the number of strokes executed by the press, and that the outputs of the pulse converters are connected to said positioning control circuits for driving said actuators.
A circuit arrangement according to claim 1 or 8, wherein said positioning control circuits are speed and position control loops.
A circuit arrangement for an automated press system having a press ram and a press automation system including actuators which are controlled by positioning control circuits, comprising:
Dependencies are inferred from the claim text.