| 摘要 |
PURPOSE:To control with good accuracy the plate thickness distribution in width direction of rolling plate and to elevate the quality by improving a three high rolling mill equipped with a stay roll at either one part of a pair of working rolls. CONSTITUTION:A lower working roll 2 of upper and lower working rolls 1, 2 is made smaller in diameter than the upper working roll 1 and a crown 3 of which end part is made smaller in diameter is provided at the end part of respectively opposite side of the upper and lower working rolls 1, 2 and a stay roll 4 supporting the lower working roll 2 is equipped. The upper and lower working rolls 1, 2 and stay roll 4 are then supported freely rotatably by a journal boxes 5, 6 and 7 which are arranged to a housing window 8 of rolling mill and a three high rolling mill equipped with the upper and lower working rolls 1, 2 and stay roll 4 supporting the lower working roll 2 is constituted. The rolling is then carried out with adjusting the gap between the working rolls 1, 2 and with shifting the working rolls 1, 2 so as to position the crown starting part at the inner side of the width end part of a rolling plate 14. In case the plate thickness distribution in width direction is caused on the rolling material 14, the working rolls 1, 2 are adjusted to the desired bending curve with the operation of hydraulic pistons 11, 12, 13. |
