FIELD: machining; applicable in machining with preliminary heating, particular, wheel pairs of rolling stock. SUBSTANCE: to prevent cold working and defects of disturbed roll surface continuity, machining is carried out with plasma heating of treated surface with direct plasma arc, for which purpose, it is located before cutter at distance of 100-200 mm with spaced relation of 25-30 mm between plasma generator and roll surface; and depth of cutting, and arc current intensity are taken 2 mm and 180 A depending on depth of detected defects on roll surface. EFFECT: higher efficiency. 2 dwg
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