Rolling process of F type rail groove rolling system

Abstract

The invention relates to a structural steel hot rolling process in the technical field of metallurgy, in particular to a rolling process of an F type rail groove rolling system. The method includes the steps that a universal groove manner is adopted, a rolled piece is subjected to compression deformation in four directions through an upper horizontal roller, a lower horizontal roller, a left vertical roller and a right vertical roller, and whole grooves can be conveniently filled with metal, wherein the left vertical roller and the right vertical roller are located in the horizontal direction;a two-roller groove manner is adopted for an edging mill, and the corners of the rolled piece are finish-machined through the upper roller and the lower roller; and the manner of repeated alternate rolling of the universal manner and the two-roller manner is adopted, so that the sizes of finished products and the angles and the shapes of edges are guaranteed. The repeated alternate manner of theuniversal manner and the two-roller manner is designed to roll an F type rail, and the precision of the sizes of the finished products and the angles and the shapes of the edges are guaranteed. By means of the groove system, the sizes can be conveniently adjusted in production, through different arrangements of roller seams, the shapes and the sizes of sections of the finished products can be conveniently controlled, the operation is convenient, and the yield is high.

Description

technical field [0001] The invention relates to a section steel hot rolling process in the technical field of metallurgy, in particular to a rolling process of an F-rail rolling pass system. Background technique [0002] The earliest F-shaped rails were machined after welding. With the domestic research of medium and low speed maglev and the construction of medium and low speed maglev test lines and operation lines, the rolling of F-shaped rails began in China. For Shanghai medium and low speed maglev Luchaogang test line, F-rail is rolled by heavy steel (rolling + machining); for Beijing medium and low speed maglev transportation demonstration line (S1 line), F-rail is rolled by Laigang (finish rolling + Partial machining); F-rail of Changsha medium and low-speed maglev operation line is rolled by Anshan Zizhu (rolling + machining). [0003] The shape of the F-shaped rail is relatively complex, and it is asymmetrical up and down, left and right, and there are many dimensio...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the two-roller mode is not conducive to metal flow, it is not easy to be filled at the tip of the leg, and R arcs or folds are easy to appear, which makes the size insufficient and increases the size of the F-shaped steel blank, thereby increasing the amount of machining

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