| 摘要 |
<p>PURPOSE:To accurately make measurement online at the time of measuring the flatness shape of a rolled material from the transverse tension distribution thereof by correcting the tension fluctuation component occurring in the transverse temp. distributing of the rolled material and determining the flatness shape. CONSTITUTION:The tension fluctuation component occurring in the transverse temp. distribution of the rolled material is corrected. The correction of the tension fluctuation component is executed by 'correcting a change in Young's modulus by the temp. change of the rolled material'. The Young's modulus is applied not as a 'constant' but as a 'function E of the temp. T of the rolled material' to the equation for calculating the elongation at the time of determining the transverse elongation rate distribution as the flatness shape from the transverse tension rate distribution. Namely, the elongation rates are calculated by the specific equation with the respective measurement points in the transverse direction. The transverse temp. distribution of the rolled material 2 is measured by disposing, for example, radiation thermometers at suitable intervals in the transverse direction thereof. A measuring instrument of a divided roll 1 system is used for the tension. The measurement error of the sheet shape based on the temp. difference in the transverse direction of the hot rolled sheet is exactly prevented in this way and the precise shape measurement is enabled.</p> |
