Wire electrical discharge machine and endface position determining method
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United States of America Patent
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Oct 4, 2022
Grant Date -
Oct 1, 2020
app pub date -
Mar 23, 2020
filing date -
Mar 27, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A wire electrical discharge machine determines the position of an endface of a workpiece by relatively moving a wire electrode toward the workpiece. The wire electrical discharge machine includes: a voltage application control unit configured to continuously apply voltage pulses between the wire electrode and the workpiece; a voltage detection unit configured to detect a voltage between the wire electrode and the workpiece; a pulse occurrence ratio calculation unit configured to calculate a pulse occurrence ratio that is a ratio of the number of the voltage pulses detected by the voltage detection unit to the number of the voltage pulses applied per a predetermined time by the voltage application control unit; and an endface position determination unit configured to determine the position of the endface of the workpiece based on the pulse occurrence ratio.
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