Electric heating – Metal heating – Cutting or disintegrating
Patent
1982-07-02
1984-09-25
Envall, Jr., Roy N.
Electric heating
Metal heating
Cutting or disintegrating
219 69D, 219 69W, 219 69M, B23P 108, B23P 116
Patent
active
044737335
ABSTRACT:
Electroerosion machining method and apparatus in which the machining gap formed between a tool electrode and a workpiece is immersed in a water liquid to surround and enclose the gap therewith in the absence of a hydrocarbon liquid surrounding the gap. The hydrocarbon liquid is injected in a forced flow under an external pressure into the machining gap immersed in, and surrounded by and enclosed with, that water liquid, whereupon electrical discharges are initiated with a discharge medium which is at least predominantly constituted with the injected hydrocarbon liquid. The water liquid may be of a relatively static mass retained in a worktank, in which mass the workpiece and at least that portion of the tool electrode which is juxtaposed therewith are immersed. The injected hydrocarbon liquid upon undergoing the electrical discharges is allowed to diffuse into the water liquid surrounding the gap to float onto the surface thereof. Alternatively, with the hydrocarbon liquid directed in at least one narrow stream selectively into the machining gap, the water liquid may be present to surround and enclose the machining gap by being directed in a flow toward the workpiece to serve as an envelope flow for the narrow stream of the hydrocarbon liquid which acts to force the water flow substantially not to enter the machining gap and then to force it to spread over a portion of the workpiece surrounding the machining gap. The tool electrode may be a continuous wire electrode.
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Dubno Herbert
Envall Jr. Roy N.
Evans Geoffrey S.
Inoue-Japax Research Incorporated
Ross Karl F.
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