METHOD FOR CONTINUOUS ROLLING OF THIN STRIPS IN MULTIPLE-STAND ROLLING MILL Russian patent published in 2010 - IPC B21B1/26 

FIELD: technological processes.

SUBSTANCE: method includes clamping of strip at least in five stages with correction of process parametres for each stand, for this purpose length of plastic section X_PL is identified, as well as length of lagging zone X_PL.LAG at this section, and their ratio which characterises position of neutral section at this section, and further rolling is carried out at the modes of clamping and tensions produced in process of correction in each stand with specified pitch of tensions and simultaneous increase of clamping in the first stands due to reduction of clamping in the last stand for maximum possible approximation to ratio X_i=X_imax in the last stand. Control of energy consumption in working stands without detriment to purity of strip surface is provided by the fact that in the first stand rolling is carried out with maximum possible clamping, and in the last but one stand - with increased clamping due to reduction of clamping in intermediate stands and additional reduction of clamping in the last stand, besides rolling is carried out with minimum possible tensions in the first interstand gap and with maximum possible tensions in the third and fourth interstand gaps, and in the second interstand gap in process of correction tension is increased with specified pitch, this controlling capacity of mill stands at each stage.

EFFECT: reduction of power inputs without detriment to purity of surface of thin cold-rolled strips produced in multiple-stand wide-strip rolling mills.

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