| 摘要 |
<p>PURPOSE:To improve the quality of a rolling material by determining the roll gap change rate of a vertical rolling mill by the specific equation, correcting the correction factors and correction rate offset thereof and correcting the gap change rate in accordance thereof. CONSTITUTION:A roughing mill is constituted of the vertical rolling mill 22 and a horizontal rolling mill 23 which rolls down a rolling material 21 in a horizontal direction. Sheet width gages 24, 25 are disposed in the inlet side of the mill 2 and the outlet side of the mill 23. The material 21 is divided longitudinally to five regions by the difference in the mechanism of deformation. One of two kinds of the target sheet width values in the non-stationary part is selected and the gap change rate DELTAW1(x) of the mill 22 is determined by the equation. The correction factors k0T, ki, k2T, k2B and the correction rate offset in the equation are corrected and the gap change rate DELTAW1(x) is corrected. The sheet width fluctuation is thereby decreased and the quality of the rolling material is improved.</p> |
