公开(公告)号：EP4289522A1

公开(公告)日：2023-12-13

申请号：EP23460020.3

申请日：2023-05-22

申请人： Arcelormittal Poland S.A.

发明人： ZAK, Sylwester ,  WOZNIAK, Dariusz

IPC分类号： B21B1/085

摘要： The subject-matter of the invention is a rolling mill roll used for rolling railway and/or tramway rails, especially of leading roll and finishing roll, wherein a pass of the working surface of the roll forming the bottom surface of rail foot is convex, while the lines forming the roll pass convexity are rounded with a radius at their contact point, and the size (S) of convexity of roll passes calculated from the straight line joining the ends of the roll pass intended to form the rail foot is in the range of 0.5 mm to 2.0 mm for the leading roll pass and in the range of 0.2 mm to 0.75 mm for the finishing roll pass.

公开(公告)号：EP4289523A1

公开(公告)日：2023-12-13

申请号：EP23460019.5

申请日：2023-05-22

申请人： Arcelormittal Poland S.A.

发明人： ZAK, Sylwester ,  WOZNIAK, Dariusz

IPC分类号： B21D1/02 ,  B21D3/16 ,  E01B5/02 ,  E01B31/08 ,  B21D3/02

摘要： The subject-matter of the invention is straightening roller for a roller straightening machine intended specifically for straightening railway or tramway rails, characterised in that the working surface of straightening roller is concave over its entire length, while the level of concavity is variable from the extreme points described by radii, which are also the maximum width of the working surface of the straightening roller, up to the centre of the straightening roller's axis of symmetry, where lines inclined towards each other at an obtuse angle between 178° and 179.5° converge and are smoothly joined by a radius - in this area the roller reaches its maximum difference in diameter at the extreme, most convex points and at the straightening roller's axis of symmetry.