| 摘要 |
PURPOSE:To raise a flattening ability for wider thickness range of a steel sheet by providing a small pitch roll group and a large pitch roll group, and using them in common, etc., in accordance with its sheet thickness. CONSTITUTION:A sheet is fed in the direction as indicated with an arrow (a) from the right of a small diameter roll 20, and subjected to a strong rolling reduction in a state that a bite of a metallic plate S is not obstructed by small diameter rolls 4, 13. It becomes a prescribed radius of curvature corresponding to the rolling reduction in the delivery of the small pitch roll group, and after the final reformation, it passes through between large diameter rolls 7, 16 so that the radius of curvature of the metallic plate S becomes zero, and when it comes out of a large diameter roll 24, it becomes a sheet having good flatness. |
