A single-line production process for medium and thick plates

Abstract

The invention relates to the field of iron and steel smelting, and specifically discloses a single-line production process for medium and thick plates, which sequentially includes a rolling mill rolling process, an online cooling process, a thermal straightening process, a cooling process before flaw detection, a UT flaw detection process, and a cutting process. , bilateral shearing process and cut-to-length shearing process, in the production process of the present invention, the equipment used in each of the above-mentioned processes is arranged along a steel plate conveying line, and an online cooling device before flaw detection is used in the cooling process before flaw detection. The production process of the present invention prevents the steel plate from being hoisted by the traditional overhead crane, and does not need to be transferred from the steel plate conveying line to the cooling bed for cooling, which greatly saves the operation time, improves the work efficiency, reduces the production cost, and solves the problems of operation. The bottleneck problem of production occurs; the production process of the present invention is not limited by the length of the plate to be processed, and can produce and process plates of different specifications, especially for the processing of super long plates, the present invention has more advantages.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a production process for medium and thick plates. Background technique [0002] In the existing medium and heavy plate production process, the production mode is to separate the rolling line and the shearing line. The so-called rolling line refers to a steel plate conveying production line mainly based on the rolling process of the rolling mill. The shearing line refers to the A steel plate conveying production line mainly includes flaw detection process and shearing process. During the working process, the rolling line carries out rolling production of steel plates, and the produced steel plates are transported to the cooling bed through the roller table, and the hot steel plate on the cooling bed is cooled and transported through the roller table. It is sent to the entrance roller table of the shearing line, and then transported by the roller table to the processes of ult...

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Problems solved by technology

[0004] Although the above-mentioned patent documents have solved the problems existing in the driving operation, they have the following defects: the first cooling bed load is very large, and each steel plate will pass through the cooling bed; the second efficiency is low, and the steel plates off the rolling line are as high as 300- 600°C, the existing cooling bed takes a long time to cool the steel plate to the temperature allowed for flaw detection (below 100°C), which seriously affects production efficiency; the third cooling bed does not belong to the online cooling method, and cannot form a continuous assembly line operation; Fourth, the length of the steel plate is limited by the length of the cooling bed, and steel plates longer than the length of the cooling bed cannot be produced, and can only be produced by adding shearing machines to the rolling line

For example, in order to solve the problem that steel plates longer than the length of the cooling bed cannot be produced, the State Intellectual Property Office published a patent document whose publication number is CN1775390A on May 24, 2006

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