Control system for a hydraulic press
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United States of America Patent
Stats
-
Jun 24, 1980
Grant Date -
N/A
app pub date -
Feb 12, 1979
filing date -
Feb 24, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control system for a hydraulic punch press is adapted to dissipate the energy stored in a hydraulic actuator so that the punch will exit the workpiece without substantial release impact. The control system includes a signal generator for producing a progressively increasing command signal while the punch penetrates the workpiece, a position transducer for producing a negative feedback signal indicating the actual punch position during such penetration, and a summing point for supplying the difference between the command and actual signals as an error signal to a servovalve used to control operation of the actuator.
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Family
International Classification(s)
Cited Art Landscape
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