Full all-purpose finished product hole type freely formed on side face of rail head of steel rail and rolling process

Abstract

The invention relates to a full all-purpose finished product hole type freely formed on the side face of a rail head of a steel rail and a rolling process. The full all-purpose finished product hole type is constituted by a head vertical roller, a bottom vertical roller and two horizontal rollers. Opening roller seams are formed in the positions, on the side face of the rail head of the steel rail, of the head vertical roller and the two horizontal rollers; the bottom vertical roller is a flat roller; and opening roller seams are formed in the positions, on the two sides of the bottom of the steel rail, of the bottom vertical roller and the two horizontal rollers. The full all-purpose finished product hole type has the advantages that under matching of the head vertical roller, the horizontal rollers and the bottom vertical roller of the full all-purpose finish-rolled finished product hole type, the rail head can be directly machined fully, the rail height and fullness same root difference of the steel rail are improved, the bending degree and the tread shape of the end of the steel rail are improved, after the full all-purpose finish rolling process is adopted, the rail height full-length variable quantity of the hectometer steel rail is decreased to be within 0.2 mm, and the bending degree is controlled within 0.1 mm.

Description

technical field [0001] The invention belongs to the technical field of rail rolling, and in particular relates to an all-purpose finish-rolled finish pass and a rolling process in which inclined surfaces on both sides of a rail head are freely widened and formed. Background technique [0002] At present, most of the rolling rails in the world adopt the universal rolling method. The universal rolling method is: universal rough rolling (UR) pass, edger (E) pass, universal finish rolling (UF) is usually Semi-universal hole pattern, see figure 1 , the pass is composed of two horizontal rollers and a bottom vertical roller. The two horizontal rollers process the rail head and the rail waist. There are some defects in the control of rail height and tread shape, such as: the difference between rail height and fullness is large, and the tread shape deviates from the standard end face. and see figure 2 , in the prior art, patent application number: 201510079722.5, which discloses...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the rolling rails in the world adopt the universal rolling method. The universal rolling method is: universal rough rolling (UR) pass, edger (E) pass, universal finish rolling (UF) is usually Semi-universal hole pattern, see figure 1 , the pass is composed of two horizontal rollers and a bottom vertical roller. The two horizontal rollers process the rail head and the rail waist. There are certain defects in the control of rail height and tread shape, such as: the rail height and fullness have a large difference between the same root, and the tread shape deviates from the standard end face, etc.

and see figure 2 , in the prior art, patent application number: 201510079722.5, which discloses a rail all-purpose finish rolling product pass and rolling process, there is instability in practical application: the inclined surfaces on both sides of the vertical roller of the rail head are easy to bite the iron wire, Therefore, since 2016, multiple rolling tests have been carried out to continuously innovate the all-purpose pass to reduce the occurrence of the above-mentioned defects

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