Combined universal rolling production line and production method of profile steels

Abstract

The invention relates to a combined universal rolling production line and a production method of profile steels. The combined universal rolling production line comprises a heating furnace, a cogging mill rolling unit, a housing type universal rolling mill rolling unit, a short stress line type universal rolling mill rolling unit and a cold bed. After coming out of the heating furnace, a blank is rolled by the cogging mill rolling unit for an odd number of times, and then the blank is rolled again by the housing type universal rolling mill rolling unit and the short stress line type universal rolling mill rolling unit in a manner of different combinations, and finally the blank is cooled to obtain a finished product. On-line control technologies of a traditional housing type universal rolling mill and a short stress line type universal rolling mill are combined together, so various universal rolling mill rolling processes can be flexibly applied, and through improvement of arrangement way of production line devices and production process, the production line overcomes the shortage of various arrangement ways in the prior art, production efficiency is improved, device project investment is lowered, rolling mill capacity is released sufficiently, and production compatibility of the production line and the like are improved.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a combined type steel universal rolling production line and a production method. Background technique [0002] It is a known technology to adopt a universal rolling mill and a universal rolling process to produce section steel (mainly H-section steel, but also section steel of other sections, such as rails, angle steel, etc.). Generally, the universal rolling production process of H-shaped steel mainly includes three forms: traditional tracking reversing rolling, semi-continuous rolling and full continuous rolling. [0003] 1. Traditional tracking reversible rolling [0004] (1) 1 U-E unit reciprocating continuous rolling ( figure 1 As shown), the number of rolling mills in the layout is small and the operation is simple, but the number of rolling passes is large and the output is low, so only large-scale products can be produced. [0005] (2) Reciprocating continuous ...

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Problems solved by technology

[0004] (1) 1 U-E unit reciprocating continuous rolling ( figure 1 As shown), the number of rolling mills in the layout is small and the operation is simple, but the number of rolling passes is large and the output is low, so only large-scale products can be produced

[0005] (2) Reciprocating continuous rolling of two U-E units ( figure 2 As shown), the layout is simple to operate and the output is high, but the long main rolling line leads to large plant area and

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