High-yield bar production system

Abstract

The invention belongs to the technical field of hot-rolled bars, and particularly relates to a high-yield bar production system which comprises a rough finish rolling area, an intermediate finish rolling area, a pre-finish rolling area and a high-speed area. The high-speed area comprises an A-line production channel, a B-line production channel and a C-line production channel; the A-line production channel comprises a water cooling unit, a first rolling mill set, a second rolling mill set and a double-length flying shear which are arranged in sequence; the B-line production channel and the C-line production channel each comprise a first flying shear, a third rolling mill set, a water cooling unit, a second flying shear, a fourth rolling mill set, a fifth rolling mill set, a pinch roll, a multiple-length shearing device, a pinch brake device and a rotating hub steel feeding device which are sequentially arranged. Production of all product specifications can be achieved on one production line, compared with a common bar production line, the functions of multiple production lines can be achieved only by adding a small amount of equipment in a high-speed area, and comprehensive investment is saved; and the production organization mode is more flexible, and the annual output can reach 2 million tons.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled bars, and in particular relates to a high-yield bar production system. Background technique [0002] In recent years, with the implementation of the new national standard GB / T1499.2-2018 for hot-rolled steel bars, the production process of hot-rolled bars has gradually been divided into two methods: 1) For large-size bars, the traditional process equipment layout is adopted, and the rolling speed Generally, it does not exceed 18m / s. Some small-sized products are subjected to temperature-controlled rolling after split cooling in the middle rolling, and the cooling bed is fed through the lifting skirt; 2) For small-sized products, in order to increase production, double-wire high-speed rolling is adopted. System and high-speed steel feeding system realize cooling bed feeding. [0003] Without exception, the new bar production lines adopt the above two production process layouts, but the obvious ...

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Problems solved by technology

[0003] Without exception, the new bar production lines adopt the above two production process layouts, but the obvious problem is that it is impossible to take into account the full coverage of product specifications, high output and low investment cost in one production line.

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