Rolling process of hot rolled steel sheet

Abstract

The present invention discloses the rolling process of hot rolled steel sheet. In the operation of the rolling process, video cameras are installed in the frame and display terminal is set in the rolling operation desk. During rolling, deviation trend of the rolled band is obtained through observing the positions of the band head, middle and tail in the frame and deviation rectifying operation is performed according to the deviation trend of the rolled band. The method can decrease the thickness of rolled band and raise the quality of the rolled product.

Description

technical field [0001] The invention belongs to the technical field of metallurgical metal pressure processing, and in particular relates to a rolling operation method of large batches of thin gauge hot-rolled steel plates. Background technique [0002] In hot-rolled steel mills at home and abroad, the operation method of hot-rolled steel is to adjust the level of work rolls by observing the wave shape of the strip to control the wave shape or to prevent accidents such as flat running and steel jamming, which can improve rolling stability and increase plate quality. The operation method of shape quality, the tail can also be leveled to prevent tail flicking by observing the shape of the tail. This traditional method is widely used, but has the following disadvantages: [0003] 1. The wave of the strip indicates that the extension of the steel on both sides of the strip is seriously unbalanced, and the strip has been seriously deviated or even hit the side guide plate to cau...

AI Technical Summary

Problems solved by technology

[0003] 1. The wave of the strip indicates that the extension of the steel on both sides of the strip is seriously unbalanced, and the strip has been seriously deviated or even hit the side guide plate to cause waves. Therefore, the time to adjust the leveling control by observing the wave shape of the strip is too late, especially Especially in the production of ultra-thin specifications, the speed of the strip is very fast, and it is too late to manually adjust the wave shape after observing it, which has caused steel jamming accidents or head crushing, and the wave shape is very long;

[0004] 2. In order to strive for the rolling adjustment time, the traditional rolling method requires the operator to be able to observe the subtle wave shape, judge it in the early stage of the wave and adjust it immediately, which requires a long (usually 1-2 years) practice Only through operator training can we master the stable steel rolling skills proficiently;

[0005] 3. Because the traditional steel rolling operation method has high requirements on the skills of the operators, during the learning process, there are many steel stacking accidents caused by the students due to operational reasons. The factory needs to pay a lot of money to train a skilled steel rolling expert

But at present, apart from Guangzhou Zhujiang Iron and Steel Co., Ltd. (the thinnest design is 1.2mm), which has achieved mass rolling of thin specifications or even ultra-thin specifications, other production lines, including traditional production lines, have not yet achieved this goal. The operation method is very likely to cause serious production accidents such as jamming of steel, which has a certain relationship with the production and product quality.

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