Automatic slippage control method suitable for rolling process of rough rolling

Abstract

The present invention provides an automatic slippage control method suitable for a rolling process of rough rolling, which comprises the following steps: a roll force judging model and a slippage control model are built; the collected roll force data of a rough rolling mill is judged by the roll force judging model; when the offset of roll force exists, the slippage control model is started to make slippage control to control and reduce the rolling speed of the rough rolling mill and the position height of a hydraulic cylinder. The present invention is fully automatic control. Because the slippage is controlled by adjusting the rolling speed of the rough rolling mill and the position height of a hydraulic cylinder in the automatic slippage control method, the abrasion of system components are not related. Thus, the slippage control effect is good, the related loss is small, and the maintaining cost is reduced.

Description

technical field [0001] The invention relates to the field of steel rolling and rough rolling control in the field of metallurgy, and more specifically relates to an automatic control slipping method suitable for the rough rolling process. Background technique [0002] In the current rough rolling of steel in the metallurgical field, for example, the second stand of the 1880 hot-rolled rough rolling mill used by Baoshan Iron and Steel Co., Ltd. often occurs in the first three passes of the rolling process. Slipping during the rolling process causes the strip to stop and other phenomena, and the shape of the strip is seriously deviated. [0003] This kind of slippage will cause many hidden dangers. The slippage can cause torsional vibration in the main drive system of the rough rolling steel rolling system, and the main drive base and the main drive will vibrate violently and hum, causing the motor parts and the main drive system to be seriously damaged. The stress value of t...

AI Technical Summary

Problems solved by technology

However, reducing the reduction of the slipping pass and reducing the speed of the slipping pass can only be achieved by manually lifting the roll gap and manually controlling the rolling speed. The response speed is slow and the control is not accurate; the method of increasing the friction coefficient of the roll It is to improve the roughness of the roll surface, but after a period of rolling, the friction coefficient of the roll will gradually decrease due to the formation of oxide film on the roll surface, and the slipping phenomenon will appear again.

[0005] In addition, there are also other methods to prevent slipping. The method disclosed in Chinese patent CN1037852 is to increase the friction coefficient of the roll by scoring the roll to control the slipping. Similarly, it also has the disadvantage of being easy to wear and cannot control the slipping phenomenon.

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