Electric heating – Metal heating – Cutting or disintegrating
Patent
1996-05-07
1998-05-26
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
B23H 102
Patent
active
057569550
ABSTRACT:
An electric discharge machine includes a pulse determining section, which determines whether an electric discharge pulse is an effective electric discharge pulse contributing to machining or an ineffective pulse not contributing to machining, a pulse counting section, which counts the number of electric discharge pulses determined to be effective electric discharge pulses, a machining speed measuring section, which measures the machining rate in the axial direction, a dividing section, which divides the total number of electric discharge pulses by the machining rate in the axial direction, a storage section, which stores predetermined constant data corresponding to electric conditions such as a waveform for a current due to materials of an electrode and a workpiece or generation of electric discharge, and a machined area computing section, which computes a machined area according to the divided data and the stored constant data. A method for controlling the electric discharge machine is also described.
REFERENCES:
patent: 4321451 (1982-03-01), Inoue
patent: 4521660 (1985-06-01), Inoue
patent: 4760233 (1988-07-01), Obara
patent: 5408064 (1995-04-01), Takahara
patent: 5571426 (1996-11-01), Akemura
T. Sato, et al, "Determination of Electric Discharge State According to Electric Discharge Pulse Waveform", Paper presented at the 2nd meeting of the Electric Machining Society, Tokyo, (1992).
Goto Akihiro
Magara Takuji
Yamamoto Masahiro
Evans Geoffrey S.
Mitsubishi Denki & Kabushiki Kaisha
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