ROLLING METHOD OF STEEL PLATE

摘要

PURPOSE:To decrease the time loss that arises from waiting for vacancy of a finishing mill and steel plates by calculating rough rolling time and plate thickness from rolling conditions for the steel plates and the finish rolling time for the previous steel plate and controlling the finish rolling time in accordance with the calculated time and thickness. CONSTITUTION:The min. rough rolling time tn' for a steel plate Ln is calculated from rough rolling condition and is compared with the set finish rolling time taun-1 of the steel plate Ln-1 before the plate Ln in a method for passing continuously plural steel plates through a roughing mill and a finishing mill which are disposed in series and rolling the plates with said mills. The tn' is designated as the set rough rolling time tn of said plate Ln is the case of taun-1<=tn' and taun-1 in the case of taun-1>tn' and said plate is roughly rolled for the time tn. The thickness thetan after rough rolling of the plate Ln to be determined by the tn is calculated and the finish rolling time taun of the plate Ln is calculated in accordance with the calculated thickness and is designated as the set finish rolling time taun of the plate Ln. The plate Ln is subjected to finish-rolling for the time taun and the taun is used to determine the set rough rolling time tn+1 for the plate Ln+1 to be passed next through the roughing mill.