A method for treating the middle line of multi-line slitting rolling in the controlled rolling process of bar production

Abstract

The invention discloses a multi-line slitting rolling center line processing method for bar production and controlled rolling processes. The multi-line slitting rolling center line processing method comprises a hole type system of a multi-line slitting rolling process, the hole type system comprises a plurality of rolling lines, different holes are arranged on each line on a roller K1 and a roller K2, the height of the middle line of the K2 roller hole pattern is larger than that of the edge line of the hole pattern of the roller K1, and the height ratio of the center line height of the hole pattern of the roller K2 is 0.5%-3.5% larger than that of the side line. According to the method, different patterns are arranged on each line on the roller K1 and the roller K2, so that on one hand, the strip production line can be used for producing three-wire and above-mentioned slitting and rolling, the problem of light weight of the center line caused by the implementation of the controlled rolling process is solved, and the weight deviation of each line of the slitting rolling is balanced. On the other hand, by the adoption of the method, although the center line is increased, the middle line of the multi-head portion does not become longer after the steel is discharged from the cold bed, and reduction of disordered steel of a cold bed is facilitated. By the method, the abrasion uniformity of the roller K1 and the roller K2 and the abrasion uniformity of each wire rolling groove is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and more specifically relates to a multi-line slitting and rolling mid-line treatment method in a bar production controlled rolling process. Background technique [0002] In the production of small-sized rods and wires, in order to improve production efficiency, multi-wire slitting and rolling processes are often used. The pass system of the multi-line slit rolling process, K6 is generally a flat roll, K5 is generally a vertical box, K4 is a dumbbell shape, K3 is a glasses shape, K1 and K2 are multi-line rolling, and K1 produces a finished product. The cross-sectional area of ​​each line of the finished product is required to be as equal as possible. In the actual rolling process, due to changes in pass design, rolling temperature, speed, elongation, rolling groove wear and other factors, the cross-sectional areas of the finished products of each line are often not equal, which is reflected i...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for processing the center line of multi-line slitting rolling in the controlled rolling process of bar production, which is used to solve the problem of light center line in multi-line slitting rolling, and aims to provide a new multi-line slitting The pass design scheme, on the one hand, can solve the problem of light weight of the middle line caused by the implementation of the controlled rolling process in the three-line and above split rolling of bar production, and balance the weight deviation of each line in the split rolling. On the other hand, this method is adopted , although the weight of the center line increases, but after the steel is removed from the cooling bed, the center line of the multi-line head will not become longer than the side line, which is conducive to reducing the disordered steel of the cooling bed. Third, using this method, the K1 and K2 rolls, each line Increased groove wear uniformity

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