High-speed wire multi-channel S-shaped large-repeater production line and rolling technique thereof

Abstract

The invention relates to a multi-channel S-shaped large repeater production line for producing high-speed wires, and a process for rolling the large repeater. A multi-channel S-shaped turn-back arrangement is adopted in the technological line between an intermediate train and a laying head to arrange high-speed area processing facilities such as a pre-finishing mill group, a finishing mill group,a reducing-sizing mill, a pair of high-speed flying shears and an intervenient water tank, a uniform temperature section and the like on an S-shaped large repeater rolling line; A, B and C channels with different rolling line lengths are used for producing high-speed wire products with different specifications respectively; and a steel-dividing track switch is adopted to control the rolling line.The multi-channel S-shaped large repeater production line can shorten the length of a main factory building, save construction lands, reduce the area of the main factory building, reduce the construction investment, avoid surface scuffing of rolling piece and improve the product quality, and has stable and reliable operation and large production flexibility; besides, all devices in a high-speed area can be overhauled under a condition of not stopping production in the process of producing different specifications, thus the operating rate of a rolling mill is improved.

Description

technical field [0001] The invention belongs to a metal pressure processing high-speed wire rod production line in the iron and steel metallurgy industry and a rolling process method thereof. Background technique [0002] In order to improve the mechanical properties of high-speed wire rod products, the development direction of modern high-speed wire rod production technology is to adopt low-temperature rolling technology. The metal is deformed in the last 2 to 4 passes at a low temperature of 750-850°C, so that the metal can obtain a finer and more uniform grain structure to improve the structure and properties of the metal. Certain steel grades can be free of annealing or reduce heat treatment time to improve the drawability and cold forming properties of steel, or to improve the strength and toughness of metals. The high-speed wire rod production line has the characteristics of high rolling speed, and the highest rolling speed reaches 105-120 m / s. Metals have a high tem...

AI Technical Summary

Problems solved by technology

In order to reduce the temperature of the rolled piece to the temperature required for low-temperature rolling and ensure the uniformity of the cross-sectional temperature of the rolled piece, a water-cooled box is installed between the pre-finishing rolling unit, the finishing rolling unit, and the reducing and sizing unit in the rolling production line. and a long enough uniform temperature section, so the rolling production line is very long and the workshop occupies a large area. At the same time, the high-speed equipment such as the pre-finishing rolling unit, finishing rolling unit, reducing and sizing unit, and high-speed flying shear must be repaired when production is stopped. Affect the ability of rolling mill equipment

[0003] At present, some modern high-speed wire rod production lines at home and abroad adopt the arrangement of ring-shaped large enclosures. The water tank and the uniform temperature section between the pre-finishing rolling unit and the finishing rolling unit adopt annular large enclosures, so that the length of the main workshop is greatly shortened, and the production is flexible. With the increased reliability, some high-speed equipment such as the finishing mill can be overhauled without stopping production, but there are still the following deficiencies: First, the ring-shaped large enclosure between the pre-finishing mill and the finishing mill adopts an arc-shaped guide groove. Parts are prone to surface scratches in the arc-shaped guide groove, which is not good for product quality. At the same time, the arc-shaped guide groove wears a lot and needs to be replaced frequently, which affects production and consumes a lot of spare parts; secondly, the pre-finishing rolling unit and the reducing and sizing unit must be shut down overhaul

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