METHOD FOR CONTROLLING BUCKLING PREVENTIVE DEVICE, AND WIDTH PRESSING EQUIPMENT INCLUDING BUCKLING PREVENTIVE DEVICE

To provide a method for controlling a buckling preventive device, that can suppress abnormality caused by warping of slabs from progressing and also reduce quality defects of slab edge parts, and to provide width pressing equipment implementing the method.SOLUTION: In width pressing equipment including one or more pairs of buckling restraining rolls and a temperature measuring unit aligned in a vertical direction in a vicinity of a center in plate thickness of a slab, a method for controlling a buckling preventive device enables changing of application between fixed position control and constant pressure control of the buckling restraining rolls according to a difference between: a predicted thickness increase amount of the slab, calculated from a width pressing equipment entering temperature measured by the temperature measuring unit, when reducing a width of the slab intermittently; and a slab thickness increase amount prescribed on the basis of a width reduction amount, an initial slab width, and a steel type.SELECTED DRAWING: Figure 1 【課題】スラブの反りによる進捗異常の抑制が可能で、スラブエッジ部の品質不良についても低減可能な、座屈防止装置制御方法と、それを行う幅プレス設備を提供する。【解決手段】スラブの板厚中心付近の上下方向に１対あるいは複数対の座屈拘束ロールと、温度測定部とを有した幅プレス設備にて、前記スラブを間欠的に幅圧下するに際して、前記温度測定部により測定された幅プレス設備進入温度から算出される、スラブの予測増厚量と、幅圧下量と初期スラブ幅、鋼種から規定されたスラブの増厚量との差異により、前記座屈拘束ロールの定位置制御と定圧制御とを可変とする、座屈防止装置制御方法。【選択図】図１