Electric heating – Metal heating – Cutting or disintegrating
Patent
1992-06-09
1993-09-07
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
219 6914, B23H 702, B23H 720, B23H 736
Patent
active
052431665
ABSTRACT:
A method and apparatus of operating a wirecut electrical discharge machine for cutting a workpiece using a generated electrical discharge in a machining gap wherein the workpiece is opposing a wire electrode. The method comprises the steps of presetting a plurality of machining conditions in accordance with dielectric pressure and machined plate thickness combinations, storing the preset machining conditions in a memory, and automatically setting an optimum machining condition based on detected dielectric pressures and the machined plate thickness calculated in a numerical controller. The machined plate thickness may be calculated by dividing an area machining feedrate corresponding to present electrical condition parameters by the actual machining feedrate.
REFERENCES:
patent: 4052583 (1977-10-01), Inoue
patent: 4392041 (1983-07-01), Yatomi et al.
patent: 4510367 (1985-04-01), Obara
patent: 4559434 (1985-12-01), Kinoshita
patent: 4833290 (1989-05-01), Obara
patent: 5045663 (1991-09-01), Neal et al.
Published English-Language Abstract of Japanese Patent Application Laid-Open No. 61-146420 "Electric Discharge Machine", Haruki Obara, Jul. 4, 1986.
Published English-Language Abstract of Japanese Patent Application Laid-Open No. 61-164721 "Wire Electric Discharge Machine", Masatoshi Yamaya, Jul. 25, 1986.
Evans Geoffrey S.
Mitsubishi Denki K.K.
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