Controller for wire electrical discharge machine and control method of wire electrical discharge machine
AssigneeFanuc Corporation
InventorRyou Nishikawa
Life of this patent
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Abstract
A controller for a wire electrical discharge machine that machines a workpiece along a machining path by relatively moving the workpiece and a wire electrode to each other while generating electric discharge across an electrode gap between the workpiece and the wire electrode, includes: a machining surface state acquisition unit configured to acquire the state of a machining surface of the workpiece; and a machining path setting unit configured to specify an excessively machined portion of the workpiece based on the acquired state of the machining surface and set an approach point at which the wire electrode is made to approach the machining surface from a machining start point, so as to avoid the excessively machined portion.
Claims14
A controller for a wire electrical discharge machine that machines a workpiece along a machining path by moving the workpiece and a wire electrode relative to each other while generating electric discharge across an electrode gap between the workpiece and the wire electrode, comprising:
- a machining surface state acquisition unit configured to acquire a state of a machining surface of the workpiece;
- and
- a machining path setting unit configured to specify an excessively machined portion of the workpiece based on the acquired state of the machining surface and set an access point at which the wire electrode approaches the machining surface from a machining start point, so as to avoid the excessively machined portion, wherein:
- the machining surface state acquisition unit is configured to acquire the state of the machining surface according to a discharge count across the electrode gap;
- and
- the machining path setting unit is configured to designate, as the excessively machined portion, a portion where the discharge count across the electrode gap is smaller than a second predetermined discharge count.
A control method for a wire electrical discharge machine that machines a workpiece along a machining path by moving the workpiece and a wire electrode relative to each other while generating electric discharge across an electrode gap between the workpiece and the wire electrode, comprising:
- a machining surface state acquiring step of acquiring a state of a machining surface of the workpiece;
- a machining path setting step of specifying an excessively machined portion of the workpiece based on the acquired state of the machining surface, and setting an access point at which the wire electrode approaches the machining surface from a machining start point, so as to avoid the excessively machined portion;
- acquiring the state of the machining surface according to a discharge count across the electrode gap;
- and
- designating, as the excessively machined portion, a portion where the discharge count across the electrode gap is smaller than a second predetermined discharge count.
Dependencies are inferred from the claim text.