Rail vertical rolling method

Abstract

The invention discloses a vertical steel rail rolling method. Four-roller universal rolling mills are arranged. The method includes that both a steel-rail finished product frame and a finish rolling frame adopt a four-roller mode, are of a vertical structure and are configured with a single hole pattern, horizontal rollers are main driving rollers, and the diameter of each horizontal roller is 0.6-1.0 times of that of each vertical roller so as to guarantee that the horizontal rollers contact with a rolled piece firstly; each of the steel-rail finished product frame and the finish rolling frame is provided with an edging mill E; tilting is performed before the rolled piece enters the finish rolling frame; on the finish rolling frame, the railhead of the rolled piece is rolled vertically and upwardly, and the finish rolling frame cooperates with the edging mill to finish precision control on rail height size of the rolled piece; on the finished product frame, the rolled piece is trimmed on the edging mill E prior to being rolled in the universal vertical finish rolling machine UF to form a finished steel rail. By the method, the defects of water tank influence, gravity influence and the like in the prior art are eliminated, production difficulty is improved, product quality is improved, and production cost can be lowered effectively.

Description

technical field [0001] The invention relates to a rail rolling method, in particular to a rail vertical rolling method. Background technique [0002] Such as figure 1 Shown is a schematic diagram of a four-high universal rolling mill rolling rails in the prior art. The structure of the four-high universal rolling mill includes: a first waist roll 11 , a second waist roll 12 , a bottom roll 13 and a top roll 14 . The first waist roll 11 and the second waist roll 12 are horizontal rolls, which are respectively positioned at the top and bottom of the rolled piece 5; During the rail rolling process, the rolling piece 5 is rolled and deformed in a lying state in a four-high universal rolling mill to obtain the final finished rail. [0003] The patent application of Chinese application number 200910160068.5 discloses a rail production method. The rail blank is rolled, cooled and straightened in sequence. The rolling conditions include setting the section size of the rail blank ...

AI Technical Summary

Problems solved by technology

[0006] The disadvantages of the traditional universal method include: large temperature difference between the upper and lower surfaces, inconsistent wear of the upper and lower rollers due to gravity, roller table friction marks on the rail head affect the contour size, rail torsion caused by gravity, asymmetrical upper and lower abdominal cavities of the rail, and cooling water accelerating the reduction of the upper surface of the rail Large mill bounce in temperature and height direction, poor dimensional stability

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