Forced broadsiding control method for rough rolling process in completely continuous hot rolling

Abstract

The invention provides a forced broadsiding control method for a rough rolling process in completely continuous hot rolling, belongs to the technical field of automatic control of hot rolled strip rolling, and aims to solve the problem of over-narrow free broadsiding range for blanks of the same specifications after flat roll rolling. In the horizontal mill rolling process of perforated rolls, a steel plate is partitioned into five areas along the width direction, and the forced broadsiding amount and dog bone deformation reset amount of each area are calculated respectively to obtain a final steel target width. Compared with a free broadsiding control method for the conventional flat roll rolling, the method has the advantages that the broadsiding amount can be increased from originally 30-40 millimeters to 100-120 millimeters, and the width accuracy can be controlled between 0 millimeter and 3 millimeters. The method can be widely popularized to plate strip rolling plants in order to enlarge the product coverage range of plate 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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