DISCHARGE DETECTION METHOD FOR ELECTROCHEMICAL MACHINING APPARATUS, AND ELECTROCHEMICAL MACHINING APPARATUS

WIPO Patent Application WO/2011/065377

A1

Disclosed is a discharge detection method used for an electrochemical machining apparatus wherein gap voltage is applied between an article to be machined (28) and an electrode (20) which faces the same, while supplying electrolyte between the article to be machined (28) and the electrode (20). The conductance of the gap between the article to be machined (28) and the electrode (20) is detected. The occurrence of a discharge is detected due to a fact that this conductance reaches a predetermined discharge criterion threshold value Vlevel. The aforementioned discharge detection method can be easily applied to a high voltage pulse assist scheme. Discharges at the time of current rise in a low voltage pulse assist scheme and the high voltage pulse assist scheme can be promptly and reliably detected. When short-circuiting occurs between the electrode and the article to be machined, this short-circuiting (discharge) can be detected.

OBARA, Haruki (3190 Gofuku Toyama-sh, Toyama 55, 〒9308555, JP)
小原治樹 (〒55 富山県富山市五福３１９０　国立大学法人富山大学内 Toyama, 〒9308555, JP)

JP2010/070930

June 03, 2011

November 24, 2010

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National University Corporation UNIVERSITY OF TOYAMA (3190 Gofuku, Toyama-shi Toyama, 55, 〒9308555, JP)
国立大学法人富山大学 (〒55 富山県富山市五福３１９０ Toyama, 〒9308555, JP)
IZUMI PRODUCTS COMPANY (3039 Ooaza-Sasaga, Matsumoto-shi Nagano, 21, 〒3998721, JP)
株式会社泉精器製作所 (〒21 長野県松本市大字笹賀３０３９番地 Nagano, 〒3998721, JP)

B23H3/02; B23H7/16

YAMADA, Fumio et al. (Ohba Bldg.A, 2F 28-4, Maruyama-cho, Shibuya-k, Tokyo 44, 〒1500044, JP)

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