| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform good continuous rolling by suppressing the amount of tension drop when changing reduction operation when a rolling condition changing point is passed in the case that materials to be rolled which are different in the rolling condition are continuously rolled. SOLUTION: When the change amount of reduction at the i-th stand in the case that the rolling condition changing point is passed through the i-th stand is expressed byΔSi, the operating speed of an actuator when changing reduction by dSi/dt, the speed of a roll at the i-th stand by Vri, the amount of change of the circumferential speed ratio of the i-th stand to that of the (i-1)th stand when the rolling condition changing point is passed through the i-th stand byΔVri, the circumferential speed changing speed of the roll when changing the circumferential speed of the roll by dVri/dt and the regulation term taking the tension drop into consideration by tli, the acting time ti for changing rolling reduction from the start of the rolling reduction changing operation till the arrival of the rolling condition changing point at the i-th stand is set by ti=Δti-tli,Δti=max(ΔSi/(dSi/dt), Vri-1×ΔVri/(dVri/dt)).</p> |
