Electric heating – Metal heating – Cutting or disintegrating
Patent
1993-11-26
1995-02-28
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6912, B23H 102, B23H 704
Patent
active
053939476
ABSTRACT:
A device for controlling a wire cut electric discharging machine is provided with a testing circuit to detect the condition between the wire electrode and the workpiece before every discharge process so as to regulate the discharge energy according to one of the detected conditions: normal discharge, arc discharge, or short circuit. The device includes two switching transistors controlled by a control unit according to the comparison result between a reference voltage and the voltage measured between the wire electrode and the workpiece being processed.
REFERENCES:
patent: 3365612 (1968-01-01), Schierholt
patent: 4614854 (1986-09-01), Obara et al.
patent: 4695696 (1987-09-01), Ozaki et al.
patent: 4945199 (1990-07-01), Tanaka et al.
patent: 5162631 (1992-10-01), Hachisuka et al.
Chuang Hsin-Jung
Liang Re-Fang
Wang Yu-Chin
Evans Geoffrey S.
Industrial Technology Research Institute
Liauh W. Wayne
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