SHEET THICKNESS CONTROL DEVICE OF SINGLE-STAND MULTI-PASSES ROLLING MILL

摘要

PURPOSE:To improve the accuracy of sheet thickness control by providing the 1st rolling force exerting part to the work roll chock of the final pass and disposing the 2nd rolling force exerting part to said work roll. CONSTITUTION:The 1st rolling force exerting part 10 constituted of a rolling down control device 11, a supporting device 12 and a load meter 13 is provided to the chock WC3 participating in one pass before the final pass. The 2nd rolling force exerting part 20 constituted of a revolving roll 21, a load control device 22, a supporting device 23 and a load meter 24 is disposed to the work roll WR3. A sensor 7 which detects the roll gap of the final pass is further provided. The rolling load of the 1st pass and 2nd pass is detected by a load cell 4 and is controlled by a rolling down control device 2 to the specified load according to the above-mentioned method. The load fluctuation of the 1st pass and 2nd pass has therefore no interference on the final pass. The accuracy of the rolling control is thus improved.