Control circuit for transfer device
AssigneeKabushiki Kaisha Komatsu Seisakusho
InventorsMasakatsu Mizumoto, Yasuhiro Umano
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Abstract
In a control circuit for a transfer device including feed bars movable along two or three axes and servo-actuators respectively provided for driving the feed bars in stroke-forming movements along the axes, there are provided a stroke signal generator for generating a stroke defining signal separately from press movement and press control device for controlling the operation of a press. Based on the output signal from the stroke signal generator, the press control delivers press starting and stopping instructions at appropriate instants not interfere with the movements of the feed bars for initiating press operations of an intermittent nature.
Claims15
A control circuit for coordination of the operation of a transfer device and a press, said press having a variable press stroke angle, comprising:
- first signal generating means for generating a first signal indicative of said press stroke angle;
- second signal generating means for generating a second signal indicative of the operational position of said transfer device;
- a drive control circuit for driving said transfer device;
- switching means for alternatively directing one of said signals to said drive control circuit;
- selectable press control means for providing an inhibition signal to said press when said second signal is directed to said drive control circuit;
- and
- selectable transfer device control means for providing an inhibition signal to said transfer device when said second signal is directed to said drive control circuit.
A control circuit for a transfer device of a press, said press having a variable press stroke angle, comprising:
- synchronization control means for controlling the movement of said transfer device based upon said
- variable press stroke angle;
- alternate control means for controlling the movement of said transfer device independent of said press movement, said alternate control means including selectable transfer device inhibition menas for inhibiting movement of said transfer device;
- and
- swithch means for alternately engaging one of said control means with said transfer device.
A control device for use in a transfer press of a type including a mechanical press, a pair of feed bars movable in 2- or 3- axis directions and a drive control system for controlling a drive of respective axes of said feed bars according to signals indicative of the movement of each axis for one stroke by means of a servo actuator, comprising
- first signal generating means for generating a first signal indicative of the movement of each axis for one stroke based on a press stroke angle of said mechanical press;
- second signal generating means for generating a second signal indicative of the movement of each axis for one stroke having an arbitrary period;
- switching means for selecting and supplying to said drive control system either one of signals generated from said first and second signal generating means;
- and
- press control means for providing start and stop command signals to said mechanical press based on said second signal when said switching means selects the second signal so that said mechanical press performs press operation for one stroke during a period when no interference takes place with said feed bars.
Dependencies are inferred from the claim text.