CONTROL APPARATUS OF MACHINE TOOL FOR PROCESSING OBJECT TO BE PROCESSED ON DIE CUSHION
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United States of America
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Issued Date -
May 6, 2021
app pub date -
Sep 18, 2020
filing date -
Sep 18, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A control apparatus of a machine tool includes: a slide position control unit configured to control a slide according to operation patterns; a pressure command generation unit configured to generate a pressure command for a die cushion according to the operation patterns; a pressure detection unit configured to detect an actual pressure of the die cushion; a die cushion speed control unit configured to control the die cushion, based on an error between the pressure command and the actual pressure; and a command reach determination unit configured to determine whether or not the error is greater than a pressure threshold, wherein the slide position control unit sets, based on a result of the determination by the command reach determination unit, a waiting period between the operation pattern at the time of the determination and the next operation pattern, wherein the slide is kept at its position during the waiting period.
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