| 摘要 |
<p>PURPOSE:To reduce the incomformity of thickness by requiring and correcting the transformation of the aimed crown through a specified expression when the weight of a slab is measured before the start of rolling and the weight of the measured slab is lighter than the weight of the target slab. CONSTITUTION:After the weight of the slab 3 is measured by a weight measuring instrument 7, it is compared with an estimated slab weight, a new amount of the aimed crown is decided, then, a rough rolling is carried out, the aimed crown is secured by a finish rolling mill 2 to make a rolled article 4. The measured value T2 of the slab weight before rolling is compared with the estimated weight T1 and when T1 is smaller, rolling is carried out according to schedule. When the measured weight value T2 is smaller, the aimed crown is changed. When the article length L1, the article width W1, the density rho are given, the transformation DELTACr of the aimed crown is required by DELTACn =F (T1, T2,5, L2, W1) and corrected in advance. In this way, after the slab weight is measured, the aimed crown is changed and a thick plate is rolled, consequently, the inconformity of thickness can be reduced.</p> |
