METHOD OF CONTINUOUS COLD ROLLING OF THIN STRIPS ON MULTIPLE-STAND ROLLING MILL Russian patent published in 2008 - IPC B21B1/28 

FIELD: metallurgy.

SUBSTANCE: invention is intended for rolling of strips on four-stand wide-strip rolling mills. During rolling, a number of parameters are monitored by measuring and/or calculating using mathematical models: reduction of cross-sectional area for stands, geometric parameters of semi-finished and finished rolled stock, tension of the strip between the stands. For each stand, the neutral section position in the deformation region is determined using a mathematical model, reductions of cross-sectional area in the stands and the strip tension between the stands are corrected. Decrease of power consumption while maintaining the required finished strip surface finish is achieved due to the fact that the 1^st stand main drive motor power is monitored additionally, by measuring or calculating, and the reduction of cross-sectional area in the first stand is set based on the power loading of its main drive within a range of 80-95% of the maximum rated power of its motor. The reduction of cross-sectional area in the 4^th stand is set within a range of 5-15%, and the remaining part of the total reduction of cross-sectional area is distributed equally between the 2^nd and 3^rd stands; for the 3^rd stand, the allowable upward deviation of the reduction of cross-sectional area from this condition is no more than 15% of the total reduction of cross-sectional area in the 2^nd and 3^rd stands.

EFFECT: decrease in power consumption.

6 cl; 7 tbl