Mitsubishi Electric Corporation

Ryoden Koki Engineering Co., Ltd.

Tamayo Ohata

Tatsushi Sato

Takashi Yuzawa

Hironori Kuriki

Hisakatsu Kawarai

Jyunji Tanimura

Hidetaka Miyake

Yasuo Onodera

Atsushi Taneda

The liquid-quality adjusting apparatus of the present invention includes: a water purifying part that deionizes a machining liquid; an anticorrosive part that exchanges ions in the machining liquid with anticorrosive ions; a conductivity measuring part that measures a measured value of conductivity of the machining liquid; a storage part that stores in advance a first reference value and a second reference value which are an upper limit value and a lower limit value of conductivity applicable to machining, respectively, and a third reference value which is between the first reference value and the second reference value; and a control part that performs control on the basis of the reference values stored in the storage part and the measured value of the conductivity of the machining liquid measured by the conductivity measuring part.

Liquid-quality adjusting apparatus, liquid-quality adjusting method, and wire electric discharge machining apparatus

Based on a discharging gap value and machining allowance value stored in a corner-control-information storing means, a speed-ratio calculating meansbeing a machining-volume calculating means calculates machining volumes of a straight line portion and a corner portion to calculate a volume ratio therebetween. A corner-portion-speed calculating meanscalculates a machining feed speed at the corner portion based on a volume ratio calculated by the speed-ratio calculating means, and then outputs to a servo amplifieron the basis of the length of a pre-corner section outputted by a pre-corner-section calculating meansand the length of a post-corner section outputted by a post-corner-section calculating means, instructions about machining feed speeds from entering the pre-corner section till getting out of the post-corner section.

Wire electric discharge machine and wire electric discharge machining method

A corrosion preventing apparatus including: a water purifying part that includes a hydrogen-ion form resin and a hydroxy-ion form resin; an anticorrosive part that includes a cation form resin and an anion form resin having anticorrosive ions supported thereon; a conductivity measuring part that measures a measured value of conductivity of a machining liquid; and a control part that controls a flow of the machining liquid to the water purifying part and the anticorrosive part on the basis of the conductivity measuring part; wherein the control part performs control on the basis of predetermined first and second conductivities and the measured value measured by the conductivity measuring part.

Corrosion preventing apparatus, corrosion preventing method, and wire electric discharge machining apparatus

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Tokyo, Japan

Tamayo Ohata