APPARATUS AND A METHOD FOR SETTING A REDUCTION RATE TO CHANGE THE THICKNESS OF A COIL DURING ROLLING ACCORDING TO THE VARIATION OF A TARGET COIL THICKNESS

摘要

PURPOSE: An apparatus and a method for setting a reduction rate during rolling according to the variation of a target coil thickness are provided to safely change the thickness of a coil by maintaining a proportional relation between the reduction rate patterns of preceding and following materials and setting a proper upper limit of acceleration of rolling.;CONSTITUTION: A method for setting a reduction rate during rolling according to the variation of a target coil thickness comprises the steps of: collecting target thicknesses of preceding and following materials and a reduction rate schedule of the preceding material, and calculating a reduction ratio control factor; and adjusting the reduction rate schedule of the preceding material according to the reduction rate control factor to obtain a reduction rate schedule for the following material.;COPYRIGHT KIPO 2013;[Reference numerals] (F(i)) Before changing target thickness of coil; (F(i+1)) After changing target thickness of coil; (h(i)) Target thickness of preceding material; (h(i+1)) Target thickness of following material