| 摘要 |
PURPOSE:To prevent a rolling sheet from the variation of sheet thickness and to prevent the lowering of yield of the sheet by measuring the thickness of oil film of an oil-film bearing and the inclination of bearing at the journal part of a backup roll of rolling mill by displacement meters and keeping them at the normal values. CONSTITUTION:The journal part 1a of a backup roll 1 of mill is supported by a journal bearing 2 to interpose an oil film between them. The distances h1, h2 between them are measured by attaching displacement meters 8 to both ends of the bearing 2, and both values (a) are adjusted so that they attain the same value when the oil film is not formed. The leads of meters 8 are connected to an amplifier 9, and displacement signals are inputted to an arithmetic device 10 to calculate the oil-film thickness at the central part of journal part and the degree of inclination due to the deviation between h1 and hz. The deviation signal E is inputted to an alarm 12 for abnormal inclination or a correcting device 13, and also inputted as an oil-film thickness correcting signal of a rolling-reduction controlling device 11, to control correctly the oil-film thickness and the inclination of journal part 1a thereby preventing the rolling from producing a reject even when the variation of sheet thickness of a rolling material is caused. |
