Sheet shape control technology used in hot strip rolling of super-wide sheets

Abstract

The invention discloses the technical field of hot strip rolling, in particular to a sheet shape control technology used in hot strip rolling of super-wide sheets. The core technology mainly comprises the steps of AVC (Asia Vital Components) application, AVC roller type curve design, formulation and implementation of a sheet shape control strategy, accurate estimation and calculation of precision of rolling mills, roll wear and thermal expansion, optimization of a model control system, and the like. In the sheet shape control technology, the front four rolling mills of a continuous hot rolling and finishing mill group adopt the AVC rollers, the following three rolling mills adopt the conventional rollers, and the axial drifting mechanism of working rollers and the model control function are optimized, namely, the front three racks are respectively provided with a proportion crown for maintaining good sheet shapes, and meanwhile, the proportion crowns of the racks behind are changed slightly or not changed, and the index of flatness of strip steel at a finishing mill outlet can be kept good.

Description

technical field [0001] The invention relates to the technical field of continuous hot rolling, in particular to the shape control technology in the hot continuous rolling production process of ultra-wide thin plates. Background technique [0002] The output and technology of hot strip production in my country have been greatly developed, but there are still some problems in the development: on the one hand, there are too many construction projects, and the products are far greater than the social demand. This is the biggest problem at present. Some enterprises are very close to each other, and at the same time build units with similar technical level, similar output, and similar products. Moreover, there is a lack of necessary research on the market and demand, the products have no characteristics, and the construction is relatively blind, which is likely to be at a disadvantage in future competition. [0003] On the other hand, in the hot continuous rolling production proc...

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Problems solved by technology

[0002] The output and technology of hot strip steel production in my country have been greatly developed, but there are still some problems in the development: on the one hand, there are too many construction projects, and the products are far greater than the social demand, which is the biggest problem at present

Moreover, there is a lack of necessary research on the market and demand, the product has no characteristics, and the construction is blind, which is likely to be at a disadvantage in future competition

[0003] On the other hand, in the hot continuous rolling production process, the main difficulty in the production of thin-gauge products lies in the difficulty in controlling the shape quality, and the produced thin-gauge products have relatively large shape problems, which are difficult to meet user requirements

[0004] The finishing mills of the hot continuous rolling production line all use the convex and concave ordinary roll shape system. Due to the large changes in the specifications and varieties of customer orders, it is difficult to use the single convex and concave ordinary roll shape plus roll shifting control system to meet the rolling plan. In general, it is necessary to equip 3 to 4 sets of conventional roll shapes to meet the needs of different rolling units. At the same time, the control system of convex and concave ordinary roll shapes plus shifting rolls is also difficult to meet the requirements of improving the shape quality of thin-gauge products. Require

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