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US 4,046,984 AGranted
Cutting-off machine working by electric sparking
AssigneeVial S.A.R.L.
InventorGuy Aime Vial
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AssigneeVial S.A.R.L.
InventorGuy Aime Vial
Estimating the term…
The present invention relates to a cutting-off or parting device working by electric sparking, enabling electrically-conductive materials to be cut-off by means of a metallic disc which circulates an electric current, the disc being composed of one or more substances which are electrically conductive during the cutting-off operation and being provided with three or more radial slots formed at the periphery of the disc, the latter being so arranged as to permit the transverse passage of a dielectric cooling liquid from one face of the disc to the other, a first means keeping the disc flat during the cutting operation and a second means being provided for constantly maintaining an equal radius over its entire periphery. Optimum relations between the dimensions of the radial slots and the initial radius of the disc are specified. The disc may be perforated or may be made from sintered or cellular products.
In a device for cutting material by means of electric sparks, said device comprising a disc of electrically conductive material through which a dielectric liquid circulates, means supporting said disc for rotary motion, and means for providing an electrical current between the periphery of said disc and said material, the improvement according to which said disc is formed with a group of circumferentially spaced radial slots therein which inhibit deformation of said disc by said current, said slots having a length equal to at least L/2, where L= the radial distance between the periphery of said disc and said supporting means.
Dependencies are inferred from the claim text.