Processing liquid-liquid quality control apparatus and method, and electric discharge machining apparatus

摘要

Be obtained and how working fluid liquid quality control apparatus for controlling without using the pH meter, conductivity and pH of the deionized water as working fluid used in the electric discharge machining process. Pure hydration unit for generating pure water to remove impurity ions impurity ions has a prescribed amount of processing liquid tank for storing a working fluid (12) from the machining liquid working fluid tank (12) (14 a), corrosion ion generator which replaces the cations predetermined impurity cations working fluid working fluid tank (12), is replaced with anticorrosive ion impurity anions and (15), the machining liquid tank (12 switching unit for water by switching to either anticorrosive ion generator (14) or net hydration part (15), the working fluid) in (16), the conductivity of the working fluid working fluid tank (12) conductivity measurement unit for measuring (13), based on the measured conductivity conductivity measurement unit (13), one anticorrosive ion generator (14) or net hydration of (15) the working fluid I a switching control unit for controlling the switching unit (16) so that the water and (17).