阅读说明：本技术 一种纠偏控制方法 (Deviation rectification control method ) 是由 李振 任伟超 张益滔 王晓广 孙健新 王晨刚 常树林 王道金 王立朋 王硕 李海 于 2019-10-29 设计创作，主要内容包括：本发明属于纠偏辊系统技术领域,公开了一种纠偏控制方法,包括：获取带钢宽度L以及跑偏量x；在跑偏量x大于等于纠偏辊系统中设置的跑偏量阈值x<Sub>1</Sub>的情况下：若宽度L大于等于纠偏辊系统中设置的宽度阈值L<Sub>0</Sub>,纠偏辊系统降速且按设定执行纠偏动作；若宽度L小于纠偏辊系统中设置的宽度阈值L<Sub>0</Sub>时,纠偏辊系统保持当前速度且按设定执行纠偏动作；在跑偏量x大于等于纠偏辊系统中设置的跑偏量阈值x<Sub>2</Sub>的情况下：若宽度L大于等于纠偏辊系统中设置的宽度阈值L<Sub>0</Sub>,纠偏辊系统强制停车且按设定执行纠偏动作；若宽度L小于纠偏辊系统中设置的宽度阈值L<Sub>0</Sub>,纠偏辊系统保持当前速度且按设定执行纠偏动作；其中,x<Sub>2</Sub>>x<Sub>1</Sub>。本发明能够实现生产效率和纠偏操作的兼容。(The invention belongs to the technical field of deviation correcting roller systems, and discloses a deviation correcting control method, which comprises the following steps: acquiring the width L and the deviation x of the strip steel; when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system 1 In the case of (2): if the width L is more than or equal to the width threshold value L set in the deviation correcting roller system 0 The deviation correcting roller system reduces the speed and executes deviation correcting action according to the setting; if the width L is less than the width threshold value L set in the deviation correcting roller system 0 When the deviation correcting roller system is used, the current speed is kept, and the deviation correcting action is executed according to the setting; when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system 2 In the case of (2): if the width L is more than or equal to the width threshold value L set in the deviation correcting roller system 0 The deviation correcting roller system forcibly stops and performs deviation correcting action according to the setting; if the width L is less than the width threshold value L set in the deviation correcting roller system 0 The deviation correcting roller system keeps the current speed and executes deviation correcting action according to the setting; wherein x is 2 >x 1 . The invention can realize the compatibility of the production efficiency and the deviation rectifying operation.)

1. A deviation rectification control method is characterized by comprising the following steps:

acquiring the width L and the deviation x of the strip steel;

when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system₁In the case of (2):

when the width L is more than or equal to the width threshold value L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the speed is reduced, and the deviation correcting roller performs deviation correcting action according to the setting;

when the width L is less than the width threshold L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the current speed is kept, and the deviation correcting roller performs deviation correcting action according to the setting;

when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system₂In the case of (2):

when the width L is more than or equal to the width threshold value L set in the deviation correcting roller system₀The deviation correcting roller system forcibly stops and performs deviation correcting action according to the setting;

the width L is less than the width threshold L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the current speed is kept, and the deviation correcting roller performs deviation correcting action according to the setting;

wherein x is₂>x₁。

Technical Field

The invention relates to the technical field of deviation correcting roller systems, in particular to a deviation correcting control method.

Background

The phenomenon that the strip steel deviates from the rolling central line of a unit during running is called as strip steel deviation. The serious deviation can cause the edge scraping of the strip steel and even the strip breakage. Therefore, the deviation problem is solved by configuring the deviation rectifying roller. Once the deviation correction roller detects that the strip steel deviates, secondary accidents such as the deviated strip steel scraping equipment and the like are prevented through the mode of forcibly decelerating and forcibly stopping the system. However, in the prior art, in the deviation correcting roller system, if deviation occurs, the system forcibly reduces the speed, but buckling of the strip steel in the furnace occurs or the quality of a coating is affected. Therefore, the automatic deceleration of the strip steel deviation correcting system is avoided, and a CPC Disable mode in the deviation correcting roller system is activated on site. However, a CPC Disable mode is activated, and the PID control is closed by the deviation correcting rollers, namely, the deviation correction of the strip steel is stopped, so that the deviation risk of the strip steel in the furnace is increased undoubtedly; and meanwhile, the automatic deceleration and automatic parking functions are shielded, so that the equipment is easy to scratch.

Disclosure of Invention

The invention provides a deviation rectifying control method, which solves the technical problems that in the prior art, a deviation rectifying roller system is incompatible with the speed reduction control and deviation rectifying operation of strip steel in the process of coping with strip steel deviation, and the strip steel deviation and equipment scratch risks are easily aggravated.

In order to solve the above technical problem, the present invention provides a deviation rectification control method, including:

acquiring the width L and the deviation x of the strip steel;

when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system₁In the case of (2):

when the width L is more than or equal to the width threshold value L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the speed is reduced, and the deviation correcting roller performs deviation correcting action according to the setting;

when the width L is less than the width threshold L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the current speed is kept, and the deviation correcting roller performs deviation correcting action according to the setting;

when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system₂In the case of (2):

when the width L is more than or equal to the width threshold value L set in the deviation correcting roller system₀The deviation correcting roller system forcibly stops and performs deviation correcting action according to the setting;

the width L is less than the width threshold L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the current speed is kept, and the deviation correcting roller performs deviation correcting action according to the setting;

wherein x is₂>x₁。

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

according to the deviation rectifying control method provided by the embodiment of the application, based on the width L of the strip steel, the deviation x is compared with a set threshold value in the deviation rectifying roller system and is used as a control basis for automatically controlling the deviation rectifying roller system, the deviation rectifying roller system is decelerated to operate, forced parking and the deviation rectifying roller action are carried out, so that the reliability of deviation rectifying operation can be guaranteed, meanwhile, the risks of device scraping and deviation damage caused by deviation of the strip steel can be flexibly controlled, and the deviation rectifying operation, the production line safety and the product quality are compatible.

Drawings

FIG. 1 is a flowchart of a deviation rectification control method provided by the present invention.

Detailed Description

The embodiment of the application provides a deviation rectifying control method, and solves the technical problems that in the prior art, the speed reduction control and the deviation rectifying operation of the strip steel are incompatible when a deviation rectifying roller system deals with the deviation of the strip steel, and the deviation of the strip steel and the scratch risk of equipment are easily aggravated.

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1, a deviation rectification control method includes:

acquiring the width L and the deviation x of the strip steel;

when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system₁In the case of (2):

when the width L is more than or equal to the width threshold value L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the speed is reduced, and the deviation correcting roller performs deviation correcting action according to the setting;

when the width L is less than the width threshold L set in the deviation correcting roller system₀When the deviation correcting roller system is used, the current speed is kept, and the deviation correcting roller performs deviation correcting action according to the setting;

when the running deviation x is more than or equal to the deviation threshold x set in the deviation correcting roller system₂In the case of (2):

when the width L is more than or equal to the width threshold value L set in the deviation correcting roller system₀The deviation correcting roller system forcibly stops and performs deviation correcting action according to the setting;

in the widthL is less than a width threshold L set in the deviation correction roller system₀When the deviation correcting roller system is used, the current speed is kept, and the deviation correcting roller performs deviation correcting action according to the setting;

wherein x is₂>x₁。

Specifically, the width L of the strip steel is used as a judgment basis to judge the influence degree of the strip steel deviation on the deviation correcting roller system, or the fault tolerance degree, if the width L of the strip steel is lower than the width threshold value L₀The width of the strip steel is low, the damage caused by deviation is small or acceptable, and the speed can not be reduced in order to keep the circulation speed and the product quality stable.

In contrast, if the width L of the strip is greater than the width threshold L₀Once deviation occurs, deviation damage occurs, the scratch risk is high, and speed reduction control or parking control should be considered.

Furthermore, the degree of deviation is considered in a grading way, and if the deviation threshold value x is set₁、x₂The method respectively corresponds to the critical points of speed reduction and forced shutdown, thereby realizing flexible control of the deviation correction roller system, realizing high-quality production efficiency and compatibility between product quality and production safety.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

according to the deviation rectifying control method provided by the embodiment of the application, based on the width L of the strip steel, the deviation x is compared with a set threshold value in the deviation rectifying roller system and is used as a control basis for automatically controlling the deviation rectifying roller system, the deviation rectifying roller system is decelerated to operate, forced parking and the deviation rectifying roller action are carried out, so that the reliability of deviation rectifying operation can be guaranteed, meanwhile, the risks of device scraping and deviation damage caused by deviation of the strip steel can be flexibly controlled, and the deviation rectifying operation, the production line safety and the product quality are compatible.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.