Automatic control of sheet forming in plan on a reversing hot rolling mill

Abstract

Abstract. The profitability of the production of plate rolling depends on the yield, which is largely determined by the shape of the plate in plan, i.e. the shape of the ends of the rental and fluctuations in width along the length of the strip, causing the end and side trim. A decrease in metal consumption requires a decrease in the side and end trim, which is possible when the shape of the rolled metal is approached in plan view to a rectangular one. The article discusses various ways to control the shape of the plate in terms of depending on the composition of the mill equipment. The study of the mathematical description of the formation of a plate in the plan with reference to the automated control system of the plate shape in the plan (CSPS) on a plate rolling mill is carried out. Mathematical models for the convexity arrow of rolling, mathematical models of natural broadening and tensile width, as well as the total broadening of the hire are given. The solution to the problem of automatic control of the plate shape in the plan by profiling wide faces of rolled metal is considered using the example of the control system of the plate shape in the plan (CSPS) for the plate reversible hot rolling mill 1500, which is a part of the ACS TP of the mill 1500. The main functions of the CSPS are to determine the profiling of rolled products thickness and positional control of the hydraulic pressure device. The control criterion is the deviation of the plate shape in the plan from the desired (rectangular). As a measure of approximating the shape of the plate to a rectangular plan, the convexity (concavity) of the front and rear ends of the plate is used. The approach to managing the plate form in the plan described in the paper was used in the development of automated control system of the plate shape in the plan (CSPS) on a number of plate mills.