AUTOMATIC CONTROL DEVICE FOR PLATE THICKNESS

摘要

PURPOSE:To improve a control accuracy of plate thickness by equipping plate thickness gauges on inlet and outlet sides of a rolling mill respectively, comparing plate thickness deviations of corresponding inlet and outlet sides and based on this comparison, controlling the outlet plate thickness predicitively. CONSTITUTION:The plate thickness meters 12, 16 are equipped on the inlet and outlet sides of the rolling mill 10 and a frequency analyzing filter 22 for deviation of plate thickness and a rolling reduction controlling controller 24 are installed. The inlet plate thickness of a rolling material 20 is compared with a set value by he plate thickness meter 12 to output a plate thickness deviation DELTAH0 on the inlet side to the filter 22 and the controller 24. The deviation DELTAh0 of the outlet plate thickness is outputted by the outlet plate thickness meter 16 to the filter 22. Each plate thickness deviation DELTAH, DELTAh is compared by the filter 22 to input signals DELTAH, DELTAh of the thickness deviations to an arithmetic part 26 comparing a damping coefficient of the plate thickness deviation with the set value to correct. In this control method, the accuracy of plate thickness control is improved.