COOLING CONTROL METHOD FOR MATERIAL TO BE ROLLED

摘要

PURPOSE:To adequately control the temp. of the material to be rolled all the time without being influenced by distrubance by detecting the energy necessary for the rolling of the material to be rolled while under rolling and by controlling the flow of a cooling liquid with the detected energy as the variable. CONSTITUTION:The strip 10 under rolling is cooled by the cooling liquid which is spouted from the cooling device 32A-32D at the outlet side of work roll 12A-12D. In this case, a processing computer 26 calculates the energy necessary for the rolling of the strip 10 based on exothermic model equation by taking in the measuring value of plate temp. gage 16, 22 at the inlet and outlet side. The computer 26 then controls flow control valve 30A-30D with the said detected energy as the variable and adjusts the cooling liquid discharge quantity of the cooling device 32A-32D. Said energy may be calculated from the observed value of the rolling motive power of the rolling mill main shaft motor 18A-18D as well. In this way the temp. of the material to be rolled can be controlled adequately all the time.