| 摘要 |
<p>PURPOSE:To improve the plate width accuracy and to improve the yield effected by reduction of extra widths by measuring widths of a rolled stock after rough horizontal rolling thoroughly over the total stock length and calculating a heating width value from edge ends, heating a required width of edge parts, edging, and then finishing rolling the stock. CONSTITUTION:Sheet widths over the total length of a rolled stock S on the outlet side of a rough horizontal rolling mill 1 are measured by a sheet width meter 2 and measured values are inputted to a low order computing element 8. Deviation values over the total length of the stock S from a target width value set in a host computing element 7 are calculated based on estimation widths after finishing rolling estimated based on measured width values. Then, heating width values from respective edge ends of the stock S required to bring the deviation values to be the target width. A controller 4 is actuated based on the calculated values to heat required widths on respective edge parts of the stock S by controlling a facing distance between both induction heaters 3 by position control signals of the controller 4 through moving mechanisms 3a. Then, the stock S is edged by an edger 5 with a required roll opening and is rolled by a finishing mill 6.</p> |
