Steel rail universal finish rolling finishing pass and steel rail universal finish rolling finishing pass rolling technology

Abstract

The invention relates to a steel rail production technology of metallurgy steel rolling, in particular to a steel rail universal finish rolling finishing pass (UF) and a steel rail universal finish rolling finishing pass rolling technology. The steel rail universal finish rolling finishing pass (UF) is formed by assembling a first vertical roll, two horizontal rolls and a second vertical roll correspondingly, and roll grooves corresponding to a finishing steel rail in appearance are processed in the first vertical roll, the two horizontal rolls and the second vertical roll respectively. At the last procedure of steel rail rolling, namely a finishing rolling procedure, the steel rail universal finish rolling finishing pass (UF) rolling technology is adopted, the first vertical roll directly and fully processes a rail head, the two horizontal rolls fully process a rail body of the steel rail, the second vertical roll fully rolls the bottom of the steel rail, and the whole steel rail profile is subjected to rolling forming at one time. Compared with the prior art, the steel rail universal finish rolling finishing pass and the steel rail universal finish rolling finishing pass rolling technology have the benefits that by adopting the steel rail universal finish rolling finishing pass and the steel rail universal finish rolling finishing pass rolling technology, the height of the steel rail, the hardness variation in fullness degree, the end curvature of the steel rail and the shape of a tread can be improved, and the dimensional precision and quality of the steel rail profile can be improved.

Description

technical field [0001] The invention relates to a steel rail production process for metallurgical steel rolling, in particular to a rail universal finish rolling finish pass (UF) and rolling process. Background technique [0002] At present, most of the rolling rails in the world adopt the universal rolling method. The so-called universal rolling includes universal rough rolling and universal finishing rolling. Universal rough rolling (UR) consists of two vertical rolls and two horizontal rolls. type, the edger (E) is a two-roll pass; the universal finishing (UF) is usually a semi-universal pass, consisting of two horizontal rolls and a bottom vertical roll, and the two horizontal rolls process the rail head and rail waist , two horizontal rollers are open in the middle of the drive side, and the rail head tread is free to fill. This semi-universal pass has certain defects in the control of rail height and tread shape, such as rail height and fullness. The same root differen...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the rolling rails in the world adopt the universal rolling method. The so-called universal rolling includes universal rough rolling and universal finishing rolling. Universal rough rolling (UR) consists of two vertical rolls and two horizontal rolls. type, the edger (E) is a two-roll pass; the universal finishing (UF) is usually a semi-universal pass, consisting of two horizontal rolls and a bottom vertical roll, and the two horizontal rolls process the rail head and rail waist , two horizontal rollers are open in the middle of the drive side, and the rail head tread is free to fill. This semi-universal pass has certain defects in the control of rail height and tread shape, such as rail height and fullness. The same root difference is large, and the tread shape deviates from the standard end face

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