Wire-breakage position estimation device and wire-breakage position estimation method
AssigneeFanuc Corporation
InventorDaiki WATANABE
Life of this patent
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Abstract
A wire-breakage position estimation device comprising: a torque acquisition unit which acquires a torque of a take-up motor; a determination unit which determines whether or not a rear end of a wire electrode has passed a take-up roller; a rotation angle acquisition unit which acquires a rotation angle of the take-up motor; and a wire-breakage position estimation unit which estimates a wire-breakage position in the wire electrode on the basis of the rotation angle acquired from when wire-breakage has occurred in the wire electrode to when the rear end has been determined to have passed the take-up roller.
Claims6
A wire-breakage position estimation device for estimating a breakage position of a wire electrode in a wire electric discharge machine,
- wherein the wire electric discharge machine comprises:
- a winding roller that winds the wire electrode that has been fed out toward a workpiece and has passed through the workpiece;
- a winding motor that drives the winding roller;
- and
- a sensor that outputs a detection signal corresponding to driving of a shaft of the winding motor,
- wherein the wire-breakage position estimation device includes:
- a torque acquisition unit that acquires torque of the winding motor based on the detection signal;
- a determination unit that determines, when the wire electrode is broken, based on the torque, whether a rear end of the wire electrode wound by the winding roller has passed the winding roller;
- a rotation angle acquisition unit that acquires a rotation angle of the winding motor based on the detection signal;
- and
- a wire-breakage position estimation unit that estimates a breakage position of the wire electrode based on a rotation angle of the winding motor from a time when the wire electrode is broken to a time when it is determined that the rear end of the wire electrode has passed the winding roller.
A wire-breakage position estimation method for estimating a breakage position of a wire electrode in a wire electric discharge machine,
- wherein the wire electric discharge machine comprises:
- a winding roller that winds the wire electrode that has been fed out toward a workpiece and has passed through the workpiece;
- a winding motor that drives the winding roller;
- and
- a sensor that outputs a detection signal corresponding to driving of a shaft of the winding motor,
- the wire-breakage position estimation method includes:
- a rotation angle acquiring step of acquiring a rotation angle of the winding motor based on a detection signal of the sensor;
- a torque acquisition step of acquiring torque of the winding motor based on the detection signal of the sensor;
- a determination step of determining, when the wire electrode is broken, based on the torque whether a rear end of the wire electrode wound by the winding roller has passed the winding roller;
- and
- a wire-breakage position estimation step of estimating a breakage position of the wire electrode based on a rotation angle of the winding motor from a time when the wire electrode is broken to a time when it is determined that the rear end of the wire electrode has passed the winding roller.
Dependencies are inferred from the claim text.