Rail rolling production line and rail rolling process applying same

Abstract

The invention belongs to the technical field of steel rolling processes and discloses a rail rolling production line and a rail rolling process applying the same. The rail rolling production line comprises a rough rolling unit; the rough rolling unit comprises a first cogging mill, a second cogging mill, finish rolling unit and a head cutting hot sawing machine; the first cogging mill and the second cogging mill are arranged in a head stripping manner; the finish rolling unit is arranged behind the second cogging mill and comprises at least four finish rolling machines which are sequentially arranged; and the head cutting hot sawing machine is selectively arranged between the second cogging mill and the finish rolling unit, wherein the first cogging mill and the second cogging mill are arranged to be capable of rolling in a reciprocating manner respectively, and at least two finish rolling machines in at least four finish rolling machines are arranged to be capable of performing continuous rolling.

Description

technical field [0001] The invention relates to the technical field of steel rolling technology, in particular to a track rolling production line and a track rolling process using the same. Background technique [0002] In the field of steel rolling technology, the rail products produced mainly include: hot-rolled crane rails, hot-rolled elevator guide rails, hot-rolled railway rails and hot-rolled light rails. [0003] At present, the domestic production of such track products is mainly rolled through the following three track rolling production lines: the first is the track rolling production line arranged in rows, that is, the rolling mills of the track rolling production line are arranged in at least two rows of rolling units along the horizontal direction It is suitable for the production of all the above-mentioned products, but due to its backward technology, poor quality control of products, low operation rate and high labor intensity, this kind of track rolling produ...

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Problems solved by technology

[0003] At present, the domestic production of such track products is mainly rolled through the following three track rolling production lines: the first is the track rolling production line arranged in rows, that is, the rolling mills of the track rolling production line are arranged in at least two rows of rolling units along the horizontal direction It is suitable for the production of all the above-mentioned products, but due to its backward technology, poor quality control of products, low operation rate and high labor intensity, this kind of track rolling production line has been seldom used at present; the second type It is a 1+3 track rolling production line imported from abroad, that is, a billet rolling mill + three finishing mills, or a 1+1+3 track rolling production line, that is, a billet rolling mill + Arrangement of one blanking mill + three finishing mills, of which the three finishing mills are arranged in tandem with three stands or the first two stands, reciprocating rolling, most of the rolling mills are imported equipment, suitable for hot rolling railway rails and hot rolling cranes With steel rails, the rolling cost is high; the third is the track rolling production line with full continuous rolling arrangement, which is only suitable for the elevator guide rails of the symmetrical rolling method (also called H-shaped rolling). Two elevator guide rails whose heads are connected together need to be equipped with a cutting and finishing line in the finishing process, and then the two elevator guide rails whose heads are connected in parallel are cut and separated. The production process is long, the cutting loss is high, and the investment is high.

[0004] The above three track rolling production lines can include the production of existing track products. For the production of light rail and elevator guide rail products, it is mainly completed by the above-mentioned first horizontal track rolling production line. However, in view of the above reasons, the track The rolling production line has been difficult to adapt to the production of light rail and elevator guide rail products; and for the above-mentioned second track rolling production line imported from abroad, it is only suitable for the production of railway rails and crane rail products , but not suitable for the production of light rail and elevator guide rail products; and for the track rolling production line of the above-mentioned third full continuous rolling arrangement, for the production of light rail and elevator guide rail products, the production efficiency is obviously low, and higher production costs

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