| 摘要 |
Provided is a plate width control device capable of improving the precision of the width of a rolled material. In a rolling system which rolls a rolled material, in the width direction of the rolled material by means of a vertical rolling mill, and in the thickness direction of the rolled material by means of a horizontal rolling mill, this plate width control device for a rolled material is provided with: a calculating unit which calculates an estimated value of a deviation amount of the width of the rolled material in the vertical rolling mill on the basis of a deviation amount of a rolling load on the rolled material by the vertical rolling mill, and calculates an estimated value of a spreading amount of the width of the rolled material when the front end of the rolled material is rolled into the horizontal rolling mill on the basis of the torque of the vertical rolling mill; and a control unit which controls a gap amount of the vertical rolling mill such that the deviation amount of the width of the rolled material is eliminated on the basis of the estimated value of the deviation amount of the width of the rolled material in the vertical rolling mill, and compensates for the gap amount of the vertical rolling mill on the basis of the estimated value of the spreading amount of the width of the rolled material when the front end of the rolled material is rolled into the horizontal rolling mill. |
