METHOD AND DEVICE FOR CONTROLLING THICKNESS, METHOD FOR CALCULATING PASS SCHEDULE IN CONTINUOUS ROLLING MILL

摘要

PURPOSE: To obtain a method and device for controlling thickness in a continuous rolling mill by which the adjustment of a tuning rate α is facilitated by formulizing the effect on tension when changing the tuning rate α. CONSTITUTION: This method has an inlet-side thickness deviation detecting state 11 for determining thickness deviation on the inlet side just before a material to be rolled enters a rolling mill, an outlet-side thickness deviation detecting stage 12 for determining the thickness deviation on the outlet side just after the material to be rolled is passed through the rolling mill, a calculating stage of the fluctuation in the forward slip for determining the fluctuation Δfs in the forward slip of the sheet speed from the inlet-side thickness deviation ΔH and the outlet-side thickness deviation Δh and a turning rate adjusting stage 10 for adjusting the tuning rate concerned with the suppression of the tension fluctuation between the rolling mills based on the fluctuation Δfs in the forward slip, the inlet-side thickness deviation ΔH and the outlet-side thickness deviation Δh.