| 摘要 |
<p>PURPOSE:To manufacture a rolled tube of high quality by computing a roll opening from a measured value of a clearance between chocks and a measured value of a roll load and controlling a difference between the roll opening and a preset target roll opening with a rolling reduction device. CONSTITUTION:Measuring devices 7, 8 of clearances between chocks are pro vided between chocks 1, 3 on the driver side and between chocks 2, 4 on the anti-driver side of a pair of upper and lower rolls 5, 6. These measured values are denoted as XW and XD. A measured value by roll load measuring devices 9, 9 set on rolling reduction devices 10, 10 of the upper roll is denoted as YP. This is substituted into the equation to compute the roll opening S and to adjust the difference between the roll opening S and a preset target roll opening with rolling reduction devices 10, 10, 11, 11 of the upper and the lower roll. In this way, the rolled tube of high quality can be manufactured.</p> |
