ROLL FOR STEPPED ROLLING OF SQUARE STRIPS Russian patent published in 1994 - IPC

FIELD: rolling of square strips by means of rolls of stepped rolling mill having groove cogging section with variable width and depth of cut, and groove passing section having constant width and depth of cut. SUBSTANCE: groove cogging section is made in form of an equilateral trapezium having 90 deg angle between sides Π/2 and shorter base width, at groove bottom, varying from , where h is the groove depth at the beginning of cogging section, to the value equal the bottom width at the beginning of the passing section. EFFECT: increased elongation per one pass; increased output of rolling mill. 4 dwg