A new concept rolling mill for flat products, i.e. the NSC intelligent mill (NIM), has been proposed. The NIM concept states that the mill can estimate and control roll force distribution across the width between the work roll and the rolled material during rolling. The roll force distribution reflects longitudinal stress distribution in the rolled material, which has a direct relationship with the flatness of the rolled material. Hence, the NIM enables real-time flatness detection and control, and the NIM can eliminate the limitations of conventional flatness control technology as follows: delay of control response mainly due to transport time from the rolling mill to the flatness sensor, noncontrol portion of the head end of the rolled material, and limited flatness control accuracy due to the low accuracy of the flatness sensor. A pilot mill on the laboratory scale was constructed, and the concept of NIM, as well as feasibility of the real-time estimation of roll force distribution, was verified.
抄録全体を表示