Wire electric discharge machine with stored discharge energy threshold function
First Claim
1. A wire electric discharge machine for conducting electric discharge machining on a workpiece by electric discharge generated in a working gap formed by a wire electrode and the workpiece by supplying electric discharge from a machining electric power source while a dielectric fluid is being supplied in the working gap formed by the wire electrode and the workpiece from flushing nozzles of dielectric fluid, comprising:
- normal electric discharge pulse detection means for detecting a normal electric discharge pulse in the working gap;
normal electric discharge pulse calculation means for calculating normal electric discharge pulse energy from the detected normal electric discharge pulses;
storage means for storing threshold value data in which a predetermined margin is ensured from an operation point when wire breakage occurs, found from a relation between the normal electric discharge pulse energy and the electric discharge machining energy setting value corresponding to various electric discharge machining conditions; and
control means for controlling the electric discharge machining energy setting value so that the threshold value data can approach the operation point.
2 Assignments
0 Petitions
Accused Products
Abstract
A wire electric discharge machine includes storage means for storing threshold value data found from a relation between the normal electric discharge pulse energy and the electric discharge machining energy setting value corresponding to various electric discharge machining conditions; and a controller for controlling the electric discharge machining energy setting value so that the threshold value data can approach an operation point at which wire breakage occurs.
9 Citations
7 Claims
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1. A wire electric discharge machine for conducting electric discharge machining on a workpiece by electric discharge generated in a working gap formed by a wire electrode and the workpiece by supplying electric discharge from a machining electric power source while a dielectric fluid is being supplied in the working gap formed by the wire electrode and the workpiece from flushing nozzles of dielectric fluid, comprising:
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normal electric discharge pulse detection means for detecting a normal electric discharge pulse in the working gap;
normal electric discharge pulse calculation means for calculating normal electric discharge pulse energy from the detected normal electric discharge pulses;
storage means for storing threshold value data in which a predetermined margin is ensured from an operation point when wire breakage occurs, found from a relation between the normal electric discharge pulse energy and the electric discharge machining energy setting value corresponding to various electric discharge machining conditions; and
control means for controlling the electric discharge machining energy setting value so that the threshold value data can approach the operation point. - View Dependent Claims (2, 3, 4, 5)
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6. A wire electric discharge machine for conducting electric discharge machining on a workpiece by electric discharge generated in a working gap formed by a wire electrode and the workpiece by supplying electric discharge energy from a machining electric power source while a dielectric fluid is being supplied in the working gap formed by the wire electrode and the workpiece from a dielectric fluid nozzle, comprising:
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normal electric discharge pulse detection means for detecting a normal electric discharge pulse in the working gap;
normal electric discharge pulse counting means for counting the number of normal electric discharge pulses from the detected normal electric discharge pulses;
storage means for storing threshold value data in which a predetermined margin is ensured from an operation point when wire breakage occurs, found from a relation between the number of normal electric discharge pulses and the pause time setting value corresponding to various electric discharge machining conditions; and
control means for controlling the electric discharge machining energy setting value so that the threshold value data can approach the operation point. - View Dependent Claims (7)
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Specification