A forced widening control method for rough rolling process in fully continuous hot rolling

Abstract

The invention proposes a forced width control method in the rough rolling process of fully continuous hot rolling, which belongs to the technical field of automatic control of hot-rolled plate and strip rolling. The invention solves the problem that the free width range of billets of the same specification is too narrow after flat roll rolling. The problem is that during the rolling process of the horizontal rolling mill with grooved rollers, the steel plate is divided into five areas along the width direction, and the forced widening amount and dog bone deformation recovery amount of each area are calculated respectively, so as to obtain the final target width just now, Compared with the traditional free spread control method of flat roll rolling, this method can increase the spread amount from the traditional 30mm ~ 40mm to 100 ~ 120mm, and the width accuracy can be controlled at 0mm ~ 3mm, and can be widely extended to plate and strip rolling factory to improve product coverage of plate and strip products.

Description

technical field [0001] The invention belongs to the technical field of automatic control of hot-rolled plate and strip rolling, and in particular relates to a forced widening control method in the rough rolling process of full continuous hot rolling. Background technique [0002] In the hot strip rolling production process, width control is a very important control link. Width accuracy is an important indicator of hot-rolled strip product quality. Good width accuracy can create better production for hot-rolling users and subsequent processes. Conditions, at the same time, reducing the width deviation can also reduce the loss of trimming, improve the yield of finished products, and achieve the purpose of saving energy and reducing consumption; [0003] In the process of width control, it is usually divided into three width control forms: reducing rolling, equal width rolling and widening rolling, and the layout of the rack is also various. The typical layout is as follows: f...

AI Technical Summary

Problems solved by technology

[0005] For the full continuous rolling process, due to the limitation of the width reduction capacity of the vertical roll equipment, equal width rolling or widening rolling is often used. The free width of the rolled piece is generally 35mm to 40mm. However, the continuous casting slabs of some enterprises The width specifications are relatively small, which cannot cover all product width specifications under the maximum capacity of the equipment. There is an urgent need for a forced widening control method in the rough rolling process of full-continuous hot rolling to realize small billets while ensuring that the width accuracy meets the requirements. Production of wide format products

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