The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2010
Filed:
Apr. 05, 2006
Yoji Nakajima, Tokyo, JP;
Hisakatsu Kawarai, Tokyo, JP;
Syuichiro Ishihara, Tokyo, JP;
Hisashi Yamada, Tokyo, JP;
Yoji Nakajima, Tokyo, JP;
Hisakatsu Kawarai, Tokyo, JP;
Syuichiro Ishihara, Tokyo, JP;
Hisashi Yamada, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In an electric discharge machining apparatus that machines a workpiece () by using a water-based dielectric fluid as a dielectric fluid while a voltage is being applied to a machining gap between an electrode () and the workpiece (), the electric discharge machine includes: an anticorrosive power source section () that applies a predetermined voltage by taking the workpiece () as a cathode and taking as an anode an anticorrosive electrode () opposing the workpiece () with an insulator () therebetween; a dielectric fluid quality measuring instrument () that measures a quality of the dielectric fluid; and a dielectric fluid quality control section () that controls a pH level of the dielectric fluid to be within a range from 8.5 to 10.5 on the basis of the measured result of the dielectric fluid quality measuring instrument ().