PLATE THICKNESS CONTROLLER OF ROLLING MILL

摘要

PURPOSE:To obtain an accurate plate thickness of a product by responsiveness to plate thickness control. CONSTITUTION:A tension controller 33 to adjust the tension of a rolled stock 30 on the inlet side of a rolling mill, a thickness gage 22 to detect the plate thickness (t) of the rolled stock on the inlet side of the rolling mill and a speed meter 50 to detect the running speed Vs of the rolled stock on the inlet side of the rolling mill are provided on the plate thickness controller of the rolling mill provided with a hydraulic rolling down device 66 to set a roll gap and a load cell 1 to detect a rolling load P. Further, rolling force is controlled and fixed by the hydraulic rolling down device according to the signal of the load cell, a variance of the plate thickness on the outlet side of the rolling mill is obtained from the signal of the thickness gage and a roll gap variance computing element 51 is provided to output a roll gap variance to a hydraulic rolling down device by calculating a timing to change a roll gap from the signal of the speed meter.