JPS55139109A - Guide plate unit of rolling mill - Google Patents

Abstract

PURPOSE:To keep the clearance between the rolling roll and the guide plate at the optimum condition, by detecting the clearance between the tip of guide plate and the rolling roll with the detector attached to the tip of guide plate of the rolling mill, and by comparing detected clearance with the optimum clearance set correspondingly to fluctuation of the sheet thickness, rolling load, etc. CONSTITUTION:The clearance (a) between the pass line and the moving guide plate 11, and the clearance (c) between rolling rolls 4, 4', are adjusted correspondingly to thickness of the rolled material by the elevator 12. Next, the initial clearance between the tip of guide plate 11 and the roll 4, and the optimum clearance (b) between the guide plate 11 and the roll 4 under the rolling condition, are set. The detector 16 attached to the tip of moving guide plate 11 always measures the clearance between the roll 4 and the guide plate 11; if the clearance changes owing to the heat or shock, it is detected, and the elevator 12 and the clearance adjuster 14 are actuated correspondingly to the detected value, and the clearance is corrected to the optimum value. Hereby, such troubles as the guide plate 11 makes flaws in the surface of the roll due to the force of rolled material, or the rolled material is bitten into clearance between the guide plate 11 and the roll 4, are prevented.