METHOD FOR HEAT-FREE CUTTING OF METAL Russian patent published in 2000 - IPC

FIELD: procession of metallic structures to scrap metal. SUBSTANCE: method comprises steps of applying electrically insulated coating onto surface of structure connected with positive pole of electric current source; making in coating groove until metal surface along path of cutting; mounting with gap non-insulated tool electrode connected with negative pole of electric current source; placing the whole system into electrolytic bath and cutting metal by means of electrically conductive medium filling gap between groove and tool-electrode; deepening groove by turning-on electric current source for making on place of said groove cutout having technologically necessary width; applying electrically insulated coating onto surface of cutout for cutting in said coating next groove until metal surface and then deepening it to next cutout; then successively performing steps for deepening cutout in metal at keeping its technologic width. EFFECT: possibility for limiting width of cutting and enhancing efficiency of metal separation at process of its anode dissolution in electrolytic bath. 4 dwg