| 摘要 |
<p>PURPOSE:To manufacture a cold rolled strip high in plate thickness accuracy by setting a relation between a ratio of a backup roll diameter to a strip length and a draft to be within a specified range. CONSTITUTION:The relation between the ratio Li/Di of the strip length Li to the backup roll diameter Di and the average draft gammai between stands is regulated to be within the range of the expression of 5.(1-gammai)<=Li/Di<=7.5.(1-gammai). In this way, even when a roll eccentricity of the backup roll at each stand exists, since an effect given to plate thickness variation due to change of roll gap by roll eccentricity is reduced, the cold rolled strip product high in plate thickness accuracy on the outlet side of the tandem can be manufactured stably.</p> |
