Electric heating – Metal heating – Cutting or disintegrating
Patent
1995-03-09
1996-03-19
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6913, 219 6918, B23H 102
Patent
active
055005004
ABSTRACT:
A process of detecting the position of generation of electric discharge between a discharge electrode of an electric discharge machine and a work. The process comprises the steps of branching a pulse discharge current into two or more branch power supply lines and supplying discharge current divisions to a discharge electrode from two or more points through the respective branch power supply lines, detecting the discharge current divisions in the branch power supply lines, calculating the peak value of each of the discharge current divisions at the time of rising of the pulse discharge current, standardizing the peak value of each of the discharge current divisions, and calculating electric discharge generation position according to the standardized peak value. In this process, the electric discharge generation position detection is performed without restriction imposed by the pulse length or by the electrode material.
REFERENCES:
patent: 3987269 (1976-10-01), Inoue et al.
patent: 4575605 (1986-03-01), Martin
patent: 4963711 (1990-10-01), Obara
"Observation of Electric Discharge Points Distribution in Electric Discharge Machining", Electric Machining Technique, vol. 15, No. 49 (1991), pp. 13-22.
"Finish Machining by EDM Using Powder Suspended Working Fluid", Electric Machining Journal, vol. 25, No. 49, pp. 47-60, Naotake Mohri et al., Oct. 1990.
Mohri Naotake
Moronuki Hideo
Evans Geoffrey S.
Toyota Jidosha & Kabushiki Kaisha
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