| 摘要 |
<p>PURPOSE:To execute stable continuous hot rolling by drastically suppressing thickness variation and tension fluctuation due to local temp. drop that are generated at the time of joining billets. CONSTITUTION:After the rear end of a preceding billet and the tip part of the following billet are butt joined, the billets are fed to rolling equipment and, when hot finish rolling is continuously executed and at time of rolling down at least the joined part between the preceding and follwing billets and its vicinity, variable control of the rigidity of rolling mill is executed at the tuning rate of 0.8-1.0 under the control cycle of <=1/1000 of the period of temp. disturbance that is generated at the time of joining the billets.</p> |
