Wire electrical discharge machine and machining method
AssigneeFanuc Corporation
InventorTomoaki Matsunaga
Life of this patent
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Abstract
A wire electrical discharge machine includes: a multiple number of switching elements connected in parallel with each other and configured to supply the machining current to the electrode gap to perform electrical discharge machining; a multiple number of switches each connected in series with the associated one of the multiple switching elements and configured to cut off each of the multiple switching elements; and a control device configured to perform control when at least one of the multiple switching elements fails so as to disconnect the failed switching elements by means of the associated switches and also change the machining conditions in accordance with the number of the failed switching elements.
Claims13
A wire electrical discharge machine performing electrical discharge machining on a workpiece by supplying, according to machining conditions, machining current from a machining power unit to an electrode gap formed between a wire electrode and a workpiece, comprising:
- a plurality of switching elements connected in parallel with each other to supply the machining current to the electrode gap to perform electrical discharge machining;
- a plurality of switches each connected in series with one of the switching elements to separate the switching elements;
- and
- a control device configured, when at least one of the switching elements fails, to disconnect the failed switching elements by means of the switches and to change the machining conditions in accordance with the number of the failed switching elements.
A machining method for a wire electrical discharge machine performing electrical discharge machining on a workpiece by supplying machining current from a machining power unit to an electrode gap formed between a wire electrode and a workpiece according to machining conditions, wherein
- the wire electrical discharge machine comprises:
- a plurality of switching elements connected in parallel with each other to supply the machining current to the electrode gap to perform electrical discharge machining;
- and
- a plurality of switches each connected in series with one of the switching elements to separate each of the switching elements,
- the machining method comprising a control step of disconnecting the failed switching elements by means of the switches and changing the machining conditions in accordance with the number of the failed switching elements when at least one of the switching elements fails.
Dependencies are inferred from the claim text.