Position control systems for rolling mill mechanisms

Abstract

The article discusses рosition control systems for rolling mill mechanisms provide automatic control of the following rolling mill mechanisms: lifting tables, pushers, slab receivers, guide rails, pressure devices for the working rolls of the stands, mechanisms for moving burners and the bridge of flame-cutting units, coiler gap adjustment mechanisms, width gauge carriages, etc. Such systems play an important role in ensuring accuracy and stability of the rolling technological process. The basis of these systems is a servo drive, which is a closed active dynamic system that controls the movement of the controlled object. In this case, the regulated value, with a certain degree of accuracy, reproduces the movement specified by the control impact. In many machines and units, there is a need to regulate the positions of executive positioning mechanisms, including those in metallurgical units. The main requirement for the studied electric drives is to ensure the required accuracy of mechanism installation in a specified point in space and to provide the required motion characteristics of the working element. This makes the task of developing and optimizing automatic control systems for positioning mechanisms relevant. The paper examines the principles of constructing position control systems for mechanisms of heavy plate rolling mill stands, presents structural and functional diagrams of a program-based position control system, describes a digital-analog position program automatic control system for rolling mill mechanisms developed by the Scientific and Production Corporation “Kyiv Institute of Automation”, and applied on several heavy plate mills. Figs.: 3. Refs.: 11 titles.