| 摘要 |
<p>PURPOSE:To provide a rolling mill with which stress concentration that is generated in the vicinity of the barrel ends on concave crown side of a curved roll is reduced in the rolling mill provided the curved rolls and in which the rolling width of a material to be rolled is unrestricted and rolling method using this rolling mill. CONSTITUTION:Chamfers 4a, 4b, 5a, 5b the lengths of which are longer than the max. shifting length smax in the axial direction of work rolls 2, 3 are provided in positions of back-up rolls 4, 5 where are opposite to the barrel ends on the concave crown sides of the work rolls 2, 3, and the work rolls 2, 3 are mutually inversely shifted in the axial direction. Cylindrical parts are not provided on the work rolls 2, 3 and continuous clearance 6 is formed over the entire barrel length. Further, the rate of decrease of the diameter of roll barrel of the chamfers 4a, 4b, 5a, 5b provided on the back-up rolls 4, 5 is made larger than the rate of increase of the diameter of roll barrel in the vicinity of the barrel ends on the concave crown side of the work rolls 2, 3.</p> |
