Method and system achieving intermediate slab head and tail shear control

Abstract

The invention provides a method and a system achieving intermediate slab head and tail shear control. The method comprises the following steps: an image acquisition device acquires image sequences of strip steel by adopting a surface formation type camera; a shape analysis device analyzes the image sequences acquired by the image acquisition device, carries out image pretreatment on head and tail images of the strip steel, detects the pretreated images, identifies the types of the strip steel, and calculates strip steel shear line positions; and a shear executive device controls shear positions of the head portion or the tail portion of the strip steel according to the strip steel shear line positions calculated by the shape analysis device. According to the method and the system, an additional device is not needed for controlling snapshot motions, and therefore operation is simplified. Besides, the method and the system can carry out various shear strategies of length fixing, percentage fixing and optimizing, and have the advantages that shear accuracy is high, shear does not slip, and maintenance amount is small.

Description

technical field [0001] The invention relates to a technology for controlling the head and tail shearing of an intermediate billet in a steel rolling process, in particular to a method and a system for realizing optimal shearing control of the head and tail of an intermediate billet. Background technique [0002] In a hot strip mill, the billet between the roughing mill and the finishing mill is called an intermediate billet. The head and tail of the irregularly shaped intermediate billet must be cut by flying shears to prevent the intermediate billet from being rolled into long strips and half-rolled waste in the subsequent coiling process. [0003] If the head and tail of the intermediate billet are cut too little, during the rolling process, the excess head and tail will cause the entire strip to jam and form roll marks on the surface of the roll, or leave a part of the tail in the rolling mill, thus Cause the steel jamming phenomenon of the next piece of steel. If the h...

AI Technical Summary

Problems solved by technology

These systems and methods have problems such as huge investment and difficult system adjustment, and it is difficult to intuitively avoid the defects in the imaging area and obtain the best image; moreover, they are easily affected by the speed of the intermediate blank, resulting in premature or too late capture, thus Affects the precise control of the head and tail shear of the intermediate billet

[0009] It can be seen that the existing optimal cutting schemes using width gauges or linear array cameras as profilers have their own problems. Jammed steel phenomenon or huge waste

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