| 摘要 |
<p>PURPOSE:To reduce variations in product thickness and to stabilize the quality by changing a command value for the number of roll rotations momently and concurrently at biting, adjusting the number of roll rotations in a multistage situation relating to the succeeding stands, and raising the number of rotations up to a target value after a duration of time of a constant tension rolling. CONSTITUTION:At the case that a stock is passed through and is rolled by a rolling line consisting of plural rolling stands is series, the number of rotations of weighting rolls in respective stands at no load condition is set to a value higher than the number of intermediate rotations compensated by experience for an excessive reduction from the command value after the succeeding stock is bitten. When a stand bites the stock, the number of weiting rotations is reduced to the number of intermediate rotations. That relation between the above two numbers of rotations is applied to the required succeeding stands so that the number of rotations is increased up to the target number of roll rotations after the stock is bitten by all rolling stands and a duration of time in which rolling with a constant tension is performed.</p> |
