BLANK ROLLING METHOD Russian patent published in 1998 - IPC

FIELD: rolled stock production, namely, manufacture of square cross section blanks from continuously cast or rolled blooms. SUBSTANCE: method comprises steps of successively deforming rectangular cross section rolled piece in horizontal and vertical rolls with box and rhomb grooved passes. In order to eliminate fractures of leading end of rolled piece the last is deformed in box passes until achieving value H_a equal to 0.5-0.6, where l_d - length of deformation zone, H_a - mean thickness of rolled piece in deformation zone. As deformed piece is tilted by angle 45 deg and then it is reduced in rhomb passes. EFFECT: enhanced efficiency. 1 cl, 1 tbl, 2 dwg, 1 expr