Power supply device for electric discharge machining

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United States of America Patent

PATENT NO 9486869
APP PUB NO 20140190941A1
SERIAL NO

14139264

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Abstract

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In a power supply device for electric discharge machining, the polarity of the voltage to be applied is determined on the basis of a result of determination whether the machining gap is in open state or not, an average value of voltages applied across the machining gap voltage during machining, and the number of successive open states with the same polarity. This eliminates the need to significantly vary the voltages to be applied from positive to negative and from negative to positive, thereby reducing the output energy required by the machining power supply.

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Patent Owner(s)

Patent OwnerAddress
FANUC CORPORATION3580 SHIBOKUSA AZA-KOMANBA OSHINO-MURA MINAMITSURU-GUN YAMANASHI 401-0597

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furuta, Tomoyuki Yamanashi, JP 30 81
Murai, Masao Yamanashi, JP 22 124

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