US Patent No. 9,217,612

TEMPERATURE MONITOR OF WIRE ELECTRIC DISCHARGE MACHINE


Patent No. 9,217,612
Issue Date December 22, 2015
Title Temperature Monitor Of Wire Electric Discharge Machine
Inventorship Koji Suzuki, Yamanashi (JP)
Shouta Irie, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 9,217,612

1. A temperature monitor of a wire electric discharge machine that machines a workpiece by supplying a working fluid from
a working fluid treatment equipment to a work tank where the workpiece is placed, comprising:
a working fluid temperature detector that detects a temperature of the working fluid;
a working fluid temperature controller that controls the temperature of the working fluid so that the temperature of the working
fluid is within a predetermined range;

a working fluid temperature comparator that determines whether the detected temperature of the working fluid is within a preset
allowable working fluid temperature range or not;

an alarm display unit that displays an alarm when determined by the working fluid temperature comparator that the temperature
of the working fluid is outside the allowable working fluid temperature range;

a working fluid temperature difference disappearing time measuring unit that measures a time that has elapsed since the detected
temperature of the working fluid falls within the allowable working fluid temperature range from outside the allowable working
fluid temperature range; and

an alarm lifting unit that calls off the alarm when a time measured by the working fluid temperature difference disappearing
time measuring unit exceeds a preset working fluid temperature difference disappearing time.