| 摘要 |
<p>PURPOSE:To prevent the fluctuation of the rolling load due to the keyway, and to improve the thickness accuracy of the sheet, by providing the finishing mill with the oil film bearing to be set by the key at a specified distance from the end of the fitting zone between the sleeve and the rolling roll. CONSTITUTION:The sleeve is set to the taper neck of the rolling roll with the key at a position 0.2 or more times of length of the pressure receiving zone of the oil film bearing distant from the end of the fitting zone between the sleeve and the taper neck of the rolling roll, that is the position excluded from the fitting zone. Next, this bearing is employed in at least the final stand of the finishing mill or the finishing mill group of the thick plate hot rolling plant. The reason of this employment of said oil film bearing is explained as follows; even if the finishing mill attains a high thickness accuracty, if the bearing of the final stand is one of the conventional style, the run-out side thickness accuracy is degraded as a result of being affected by the fluctuation of the roll gap because of the deformation of the keyway.</p> |
