| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain the concentration of a corrosion inhibitor in a machining liquid at a predetermined degree to secure a stable anticorrosive effect by adding the corrosion inhibitor to the machining liquid according to the reduction of the corrosion inhibitor in the machining liquid. Ž<P>SOLUTION: When an added corrosion inhibitor is adsorbed on the surface of an immersion device 40 and on an ion-exchange resin 22b and further reacted and consumed during electric discharge machining, the amount adsorbed by the surface of the immersion device 40, the amount adsorbed by the ion-exchange resin 22b, and the amount consumed during electric discharge machining are obtained, and the addition in the amount adsorbed by the surface of the immersion device 40 further added to a predetermined additional amount is performed. In addition, after the adsorption on the surface of the immersion device 40 reaches equilibrium, the ion-exchange resin 22b exchanges ions of the machining liquid and electrically machines a workpiece W. The amount adsorbed by the ion-exchange resin 22b and the amount consumed by the electric discharge machining are further added during the electric discharge machining. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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