METHOD FOR CONTROLLING WIDTHWISE SHAPE OF HOT ROLLING STEEL PLATE

摘要

PURPOSE: A method for controlling a widthwise shape of a hot rolling steel plate is provided to obtain a good widthwise shape of the hot rolling steel plate by controlling a roll bending force and preventing a profile defect caused by the excessive setup of a fair cross and a work roll bender. CONSTITUTION: A target plate profile is set up and is rolled under the initial bending force. This time of the plate profile is measured so that the measured plate profile is indicated as an approximate function. The coefficient of the approximate function is obtained by the minimum involution. Next, thickness to plural plate widthwise points is obtained by putting the coefficient in the approximate function, and an average profile is obtained. After, a gap between the target plate profile and the average is obtained, a calibration bending force is obtained by using the gap. Accordingly, the initial bending force is calibrated as much as the calibration bending force.