APPARATUS FOR ACTING UPON FRICTION VALUE RELATION BETWEEN STRIP AND UPPER AND LOWER ROLLS OF ROLLING STAND AND METHOD FOR ROLLING STRIP LIKE PRODUCT

FIELD: rolled stock production. SUBSTANCE: apparatus for acting upon friction relation between strip and upper and lower rolls of rolling stand in line for hot rolling of wide strip or in line for cold rolling of strip is provided with device for spraying predetermined quantity of liquid towards rolling roll gap and controlling device for determining quantity of liquid and for supplying it. Spraying device is arranged at inlet side of rolling stand. Control value of controlling device is preliminarily determined value or value calculated in combination with real torque of lower and(or) upper roll. Method for rolling strip like piece between upper and lower rolls of rolling stand in line for cold rolling comprises steps of moistening upper and(or) lower side of rolled strip by means of spraying device at controlling quantity of sprayed liquid and supplying it; performing liquid quantity control while using as controlling value preliminarily determined value or value calculated in combination with real torque value of lower and(or) upper roll. EFFECT: enhanced efficiency of rolling process. 10 cl, 2 dwg