CN-122007177-A - Strip steel tension loss control method, device and medium

CN122007177ACN 122007177 ACN122007177 ACN 122007177ACN-122007177-A

Abstract

In the actual production process of hot rolled strip steel, the method responds to the strip steel entering a downstream rack corresponding to a loop so as to enable the downstream rack to finish biting steel, and the loop is controlled to be sleeved by a forced moment sleeve lifting control mode; when the moment of loop lifting reaches the set forced lifting moment, the control stage of the loop is changed from the forced moment lifting stage to the tension control stage, in the tension control stage, the loop is subjected to open-loop control within the preset time period, and when the preset time period is over, the loop is controlled in a closed-loop control mode, so that the tension adjustment of the strip steel is realized. The method, the device and the medium can solve the problems that in the prior art, when the hot rolled strip steel production line adopts forced moment loop pull-up back rotation tension control, the strip steel tension is higher at the moment and the detection hysteresis influence is caused, the strip steel tension adjustment is controlled by the loop, the strip steel tension is easy to be caused, and the rolling stability of the production line is seriously influenced.

Inventors

ZHANG JUNXIAN
WANG XUEQIANG
LIANG LIANG
QI YULING
MA ZHIWEI
LUO PING
CHEN JUNMIN
ZHONG HUACHUN

Assignees

湖南华菱涟钢特种新材料有限公司
湖南华菱涟源钢铁有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. A strip steel tension loss control method, characterized by comprising the following steps: In the actual production process of hot rolled strip steel, responding to the strip steel entering a downstream rack corresponding to a loop so as to enable the downstream rack to finish biting steel, and controlling the loop to loop in a forced moment loop-lifting control mode; when the moment of loop lifting reaches the set forced lifting moment, the control stage of the loop is changed from the forced moment lifting stage to the tension control stage; In the tension control stage, the loop is subjected to open loop control within a preset time period, and when the preset time period is over, the loop is controlled in a closed loop control mode, so that tension adjustment of the strip steel is realized, wherein the preset time period is obtained based on field device data analysis.
2. The method of claim 1, wherein the field device data comprises loop tension curve data collected by a field device; In the tension control stage, the loop is subjected to open loop control within a preset time period, and when the preset time period is over, the loop is controlled in a closed loop control mode, so that before tension adjustment of the strip steel is realized, the method further comprises: And analyzing according to loop tension curve data acquired by field equipment under the strip steel tension loss working condition to obtain the preset duration.
3. The method according to claim 2, wherein the analyzing according to loop tension curve data collected by a field device under a strip steel tension loss condition to obtain the preset duration specifically includes: acquiring a point corresponding to a tension highest value during a forced moment starting stage and a point corresponding to a tension lowest value during a tension control stage from loop tension curve data acquired by field equipment under a strip steel tension losing working condition; And determining the time period between the point corresponding to the highest tension value and the point corresponding to the lowest tension value as the preset duration.
4. The method according to claim 1, wherein in the tension control phase, the loop is controlled in an open loop for a preset time period, and when the preset time period is over, the loop is controlled in a closed loop control manner, so as to realize tension adjustment of the strip steel, and the method specifically comprises: Calculating a target moment when the forced moment sleeve lifting stage is converted into a tension control stage, wherein the target moment when the forced moment sleeve lifting stage is converted into the tension control stage is smaller than the forced sleeve lifting moment; Judging whether the strip steel has a tension losing problem or not according to the target moment and the forced sleeve lifting moment; In response to the tension loss problem of the strip steel, in the tension control stage, performing open-loop control on the loop based on the forced loop lifting moment within a preset time period, and controlling the loop in a closed-loop control mode based on the forced loop lifting moment when the preset time period is over so as to realize tension adjustment of the strip steel.
5. The method according to claim 4, wherein the calculating the target torque when the forced torque jack phase is shifted to the tension control phase comprises: acquiring the actual tension of the strip steel when the forced moment sleeve starting stage is converted into the tension control stage; and calculating a target torque when the forced torque sleeve starting stage is converted into a tension control stage according to the actual tension of the strip steel and the preset tension, wherein the actual tension of the strip steel when the forced torque sleeve starting stage is converted into the tension control stage is larger than the preset tension.
6. The method according to claim 4, wherein the determining whether the strip steel has a tension failure problem according to the target torque and the forced jacket lifting torque comprises: And if the difference value between the forced sleeve lifting moment and the target moment is larger than a preset threshold value, judging that the strip steel has the tension losing problem.
7. The method of claim 1, wherein the actual production process of the hot rolled strip comprises an actual production process of 1580mm hot continuous rolled strip.
8. A strip steel tension loss control device, characterized by comprising: The control module is used for responding to the strip steel entering a downstream rack corresponding to the loop to enable the downstream rack to finish biting steel in the actual production process of the hot rolled strip steel, and controlling the loop to be sleeved through a forced moment sleeve-lifting control mode; The conversion module is connected with the control module and is used for converting the control stage of the loop from the forced moment loop lifting stage to the tension control stage when the moment of loop lifting reaches the set forced loop lifting moment; The control and adjustment module is connected with the conversion module and used for carrying out open-loop control on the loop in a preset time length in the tension control stage, and controlling the loop in a closed-loop control mode when the preset time length is over so as to realize tension adjustment of the strip steel, wherein the preset time length is obtained based on field device data analysis.
9. A strip tension loss control device comprising a memory and a processor, the memory having a computer program stored therein, the processor being arranged to run the computer program to implement the strip tension loss control method of any one of claims 1 to 7.
10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, which when executed by a processor, implements the strip tension loss control method according to any one of claims 1 to 7.

Description

Strip steel tension loss control method, device and medium Technical Field The invention relates to the technical field of strip steel production, in particular to a strip steel tension loss control method, a strip steel tension loss control device and a strip steel tension loss control medium. Background The loop is divided into a waiting process, a loop lifting process, a tension and loop amount adjusting process, a tail small loop falling process and a loop falling process in the actual production process of the hot rolled strip steel. When the angle of the loop and the tension of the strip steel reach a certain amplitude, the loop lifting process is finished, the loop enters a tension and loop quantity adjusting stage, the tension of the strip steel can be calculated by combining the pressure and angle detected by an angle encoder or a pressure sensor arranged on a loop arm and the physical size of a loop mechanical structure, the difference value compared with the set tension of a secondary model is controlled by PI control to adjust the opening degree of a servo valve, the loop is lifted or dropped by tension adjustment, thereby realizing the constant tension of the strip steel in the process, the loop quantity adjustment is controlled by using the difference value between the loop height set by the secondary model and the actual loop height to stabilize the loop at a height by PI adjustment, the loop can be controlled to drop at a set position by precisely calculating before the strip steel tail leaves an upstream rolling mill, the loop can be controlled to drop at a set position by accurately, the loop tail is controlled by the speed adjustment, the tail of the strip steel is controlled by the tail part of the strip steel, and the tail is controlled by the tail part of the strip steel to be controlled to drop, and the tail part of the strip steel is controlled by the tail part is controlled by the speed adjustment, and the tail part of the strip steel is controlled by the tail part of the strip steel is controlled to drop stage, and the tail part is controlled by the tail part of the strip steel is controlled to be in a state, and the tail is in a state, and the tail is in a state is well when the tail is controlled. However, when the forced moment loop is adopted to control the back rotation tension of the hot rolled strip steel production line in the prior art, the control loop is controlled to adjust the tension of the strip steel, so that the strip steel tension is easy to cause the strip steel tension loss, and the rolling stability of the production line is seriously affected. Disclosure of Invention The invention aims to solve the technical problems of the prior art, and provides a strip steel tension loss control method, a device and a medium, which are used for solving the problems that the strip steel tension is higher and the detection lag is influenced when the forced moment loop is adopted to carry out the loop pulling back tension control on the hot rolled strip steel production line in the prior art, the strip steel tension loss is easily caused by controlling the loop to carry out the strip steel tension adjustment, and the rolling stability of the production line is seriously influenced. In a first aspect, the present invention provides a method for controlling strip steel tension loss, including: In the actual production process of hot rolled strip steel, responding to the strip steel entering a downstream rack corresponding to a loop so as to enable the downstream rack to finish biting steel, and controlling the loop to loop in a forced moment loop-lifting control mode; when the moment of loop lifting reaches the set forced lifting moment, the control stage of the loop is changed from the forced moment lifting stage to the tension control stage; In the tension control stage, the loop is subjected to open loop control within a preset time period, and when the preset time period is over, the loop is controlled in a closed loop control mode, so that tension adjustment of the strip steel is realized, wherein the preset time period is obtained based on field device data analysis. Further, the field device data comprises loop tension curve data collected by the field device; In the tension control stage, the loop is subjected to open loop control within a preset time period, and when the preset time period is over, the loop is controlled in a closed loop control mode, so that before tension adjustment of the strip steel is realized, the method further comprises: And analyzing according to loop tension curve data acquired by field equipment under the strip steel tension loss working condition to obtain the preset duration. Further, the analyzing according to loop tension curve data collected by the field device under the strip steel tension loss working condition to obtain the preset duration specifically includes: acquiring a point corresponding to a tension highest value during a force