Title:
ELECTRICAL DISCHARGE MACHINING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/052494
Kind Code:
A1
Abstract:
Disclosed is an electrical discharge machining device (M) provided with: a Z-axis displacement mechanism (4) that can precisely displace an electrode (E); a position control unit (16) that detects the travel distance of the electrode (E); a capacitance measurement unit (12) and a capacitance measurement control unit (17) that can measure the total capacitance between the processing site of a workpiece (W) and the electrode (E); and a machining surface area calculation unit (21) and a capacitance calculation unit (22), which, during discharge machining, when the electrode (E) is displaced to the first and second displacement positions by means of the z-axis displacement mechanism (4), use first and second inter-electrode distances h1 and h2 detected by the position control unit (16) and first and second total capacitances C1 and C2 measured by a capacitance measurement unit (12) and a capacitance measurement control unit (17) to calculate the surface area (S) of the machining surface and the first and second inter-electrode capacitances Cp1 and Cp2 between the advancing surface of the electrode and the machining surface, respectively. Thus, on the basis of the machining surface area (S) and the first and second inter-electrode capacitances Cp1 and Cp2, electrical machining conditions of discharge pulses are set, machining conditions are changed at optimal measurement intervals corresponding to the inter-electrode state, and jump operations are controlled.
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Inventors:
FUJIMOTO, Ichiro (9-69, Hino-cho Nishinomiya-sh, Hyogo 22, 〒6638022, JP)
Application Number:
JP2010/068670
Publication Date:
May 05, 2011
Filing Date:
October 22, 2010
Export Citation:
Assignee:
FUJIMOTO, Ichiro (9-69, Hino-cho Nishinomiya-sh, Hyogo 22, 〒6638022, JP)
International Classes:
B23H1/02
Attorney, Agent or Firm:
OKAMURA,Toshio (OKAMURA TOKKYO JIMUSYO, Kondo Bldg.5F., 4-12, Nishitemma 4-chome, Kita-k, Osaka-shi Osaka 47, 〒5300047, JP)
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