| 摘要 |
<p>PURPOSE: To evade the breaking of a sheet during rolling and improve the worsening of the threading performance of sheet by determining a bender force changing pattern taking the amount of change into consideration, next, tracking the joined part of slabs from just after joining, acting bender forces at one or more stands according to the pattern and rolling the slab. CONSTITUTION: After butting and joining the rear end part of a preceding slab 1 with the tip part of the succeeding slab 2, these slabs are fed to continuous hot rolling equipment 6 in which plural stands having the function for bending a work roll are arranged and finish rolling is executed. At that time, the variation of rolling load at the time of rolling the joined material is predicted based on disturbance due to the joined part of the slab 1 is predicted before finish rolling, the amount of change of bender force of the work roll at the time of rolling the joined part of the slab 1 is calculated from this variation of rolling load and the bender force changing pattern taking the amount of change into consideration is determined. Next, the joined part of the slab is tracked with a tracking device 7 and the bender force is acted according to the pattern.</p> |
