METHOD FOR OPTIMIZATION OF COOLING MODE OF ROLLING ROLLS IN SHEET ROLLING MILL Russian patent published in 2002 - IPC

FIELD: metallurgy, namely rolled stock production, particularly system for cooling rolling rolls of mills for cold and hot rolling of sheets. SUBSTANCE: method comprises steps of setting maximally possible total flowrate of cooling agent supplied onto rolls from all headers; measuring by means of flowmeters individual flowrate V cu.m/h of cooling agent for each header; determining for each header "sprinkling intensity" according to given formula V11= V/F cu.m/h x sq.m, where F sq.m is real surface area of each roll sprikled by cooling agent; comparing sprinkling intensity of each roll with its optimal value corresponding to range 180-220 cu.m/h x sq.m; if V11 is more than 220 cu.m/h x sq.m reducing flowrate of cooling agent until it achieves optimal range; if V11 is less than 180 cu.m/h x sq.m increasing flowrate of cooling agent until it achieves optimal range while using excess cooling agent of previous headers. When quantity of excess cooling agent of previous headers is insufficient for increasing flowrate up to 180 cu.m/h x sq. m at least in one header, - reducing flowrate values of those headers where they are near upper limit of optimal range (reducing only until value no less than lower limit of said range); using additional excess of cooling agent for making up its flowrate in those headers for which flowrate is less than 180 cu. m/h x sq.m until achieving optimal range or its lower limit value; determining flowrate of cooling agent of each jet Vj cu.m/h=V/n, where n is number of jets in header; then according to known characteristics of jet based upon dependance "jet pressure - flowrate" [p=f(Vj)], determining pressure values in jets of each header and setting those values according to optimal range from 5 to 2 due to changing surface area of jet outlet openings that is by increasing surface area at p exceeding 5 excess and reducing it at p being less than 2. EFFECT: possibility for optimizing cooling mode of rolls without increasing total consumption of cooling agent. 2 dwg, 4 tbl