High-precision roll gap adjusting system and method for pickling and rolling working roll

Abstract

The invention relates to the technical field of roll gap adjustment, and discloses a high-precision roll gap adjustment system and method for an acid rolling working roll. According to the system and the method, related data of a roll gap is collected through a sensor, a data processing unit calculates a roll gap thickness mean value, a roll gap thickness variance, roll gap skewness and a roll gap standard temperature according to the collected data, a calculated value is analyzed and judged, and when the calculated value does not conform to system expectation, the system is started. The control and execution unit is used for calculating the roll gap adjusting amplitude, the roll gap adjusting speed and the roll gap adjusting direction, generating a corresponding control instruction according to the roll gap adjusting amplitude, the roll gap adjusting speed and the roll gap adjusting direction and actually adjusting the roll gap according to the instruction, and the feedback monitoring module is used for monitoring the adjusted roll gap state after the roll gap is adjusted. And when the adjusted roll gap still does not meet the actual use requirement, information is fed back to the data processing module for a new round of data processing calculation, and the accuracy and consistency of the roll gap adjusting process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of roll gap adjustment, and specifically to a high-precision roll gap adjustment system and adjustment method for a pickling and cold rolling work roll. Background Technique

[0002] The pickling and cold rolling work roll is an important device used in the pickling and cold rolling process, mainly used in the process of steel processing. Pickling and cold rolling is to roll steel materials in an acidic medium to remove surface oxides and impurities and obtain higher surface quality. As the core component in the rolling mill, the surface state, geometric shape, and dimensions of the work roll directly affect the efficiency of the rolling process and the product quality. The work roll applies pressure and temperature to cause plastic deformation of the steel on its surface, so as to achieve the required thickness and shape. Reasonable roll gap adjustment can reduce waste products caused by unqualified processes, thereby reducing production costs.

[0003] Traditional roll gap adjustment often relies on manual operation, which is easily affected by the skills, experience, and judgment of operators, and may lead to unstable adjustment effects. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-precision roll gap adjustment system and adjustment method for a pickling and cold rolling work roll, which are equipped with a temperature sensor, a pressure sensor, and a thickness sensor to collect roll gap temperature data, roll pressure data, and roll gap thickness data. The data processing unit processes and analyzes the transmitted data, calculates the average value Kfjz of the roll gap thickness, the variance Khfc of the roll gap thickness, the skewness Kfpd of the roll gap, and the standard temperature Kbwd of the roll gap. After the calculation is completed, a preliminary analysis and judgment are carried out on the calculated values. When the calculated values do not meet the system expectations, the roll gap adjustment amplitude Tzfd, the roll gap adjustment speed Ktsd, and the roll gap adjustment direction Ktfx are calculated and transmitted to the control and execution unit. The control and execution unit generates corresponding control instructions according to the roll gap adjustment amplitude, the roll gap adjustment speed, and the roll gap adjustment direction, and performs actual adjustment of the roll gap according to the above instructions. After the roll gap adjustment is completed, the feedback monitoring module monitors the state of the adjusted roll gap. When the adjusted roll gap still does not meet the actual use requirements, the information is fed back to the data processing module for a new round of data processing and calculation, generates control instructions through the automatically calculated roll gap adjustment amplitude, speed, and direction, and realizes automatic adjustment, reducing human intervention and improving the accuracy and consistency of the roll gap adjustment process, and solving the above problems.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A high-precision roll gap adjustment system for an acid rolling work roll, comprising a temperature acquisition unit, a pressure acquisition unit, a thickness acquisition unit, a data processing unit, a control and execution unit, and a feedback monitoring unit;

[0008] The temperature acquisition unit acquires roll gap temperature data through a temperature sensor, the pressure acquisition unit acquires inter-roll pressure data through a pressure sensor, and the thickness acquisition unit acquires roll gap thickness data through a thickness sensor. The above acquired data is transmitted to the data processing unit through a wireless network;

[0009] The data processing unit processes and analyzes the transmitted data, calculates the average roll gap thickness Kfjz, the roll gap thickness variance Khfc, the roll gap skewness Kfpd, and the standard roll gap temperature Kbwd. After the calculation is completed, a preliminary analysis and judgment are made on the calculated values. When the calculated values do not meet the system expectations, the roll gap adjustment amplitude Tzfd, the roll gap adjustment speed Ktsd, and the roll gap adjustment direction Ktfx are calculated and transmitted to the control and execution unit;

[0010] The control and execution unit generates corresponding control instructions according to the roll gap adjustment amplitude, the roll gap adjustment speed, and the roll gap adjustment direction, and makes actual adjustments to the roll gap according to the above instructions;

[0011] The feedback monitoring module monitors the state of the roll gap after the roll gap adjustment is completed. When the adjusted roll gap still does not meet the actual use requirements, the information is fed back to the data processing module for a new round of data processing and calculation.

[0012] Preferably, the formula for the data processing unit to calculate the average roll gap thickness Kfjz is as follows:

[0013]

[0014] In the formula, Kfjz represents the average roll gap thickness, N represents the total number of acquired roll gap thickness data, Kdhd i represents the roll gap thickness value of each sample, and i represents the counting subscript.

[0015] Preferably, the formula for the data processing unit to calculate the roll gap thickness variance Khfc is as follows:

[0016]

[0017] In the formula, Khfc represents the roll gap thickness variance, N represents the total number of acquired roll gap thickness data, and i represents the counting subscript.

[0018] Preferably, the formula for the data processing unit to calculate the roll gap skewness Kfpd is as follows:

[0019]

[0020] In the formula, Kfpd represents the roll gap skew, N represents the total number of obtained roll gap thickness data, Kdhd represents the roll gap thickness value of each sample, i represents the counting subscript, Kfjz represents the average roll gap thickness, and Khfc represents the variance of the roll gap thickness. represents the standard deviation of the roll gap thickness.

[0021] Preferably, the formula for the data processing unit to calculate the standard roll gap temperature Kbwd is as follows:

[0022] Kbwd = Scwd + α * (Mbwd - Scwd)

[0023] In the formula, Kbwd represents the standard roll gap temperature, Scwd represents the actually measured roll gap temperature, α represents the linear thermal expansion coefficient of the material, expressed in 1 / k, and this value is obtained from the material handbook. Mbwd represents the target standard temperature, which is determined by the production process technical specifications.

[0024] Preferably, the data processing unit performs preliminary analysis and judgment on the average roll gap thickness Kfjz, the variance of the roll gap thickness Khfc, the roll gap skew Kfpd, and the standard roll gap temperature Kbwd. The judgment conditions are as follows:

[0025] The absolute value of the average roll gap thickness |Kfjz - 1.0| > 0.05, the variance of the roll gap thickness Khfc > 0.0025, the absolute value of the roll gap skew |Kfpd| > 0.5, the standard roll gap temperature Kbwd < 200 or Kbwd > 300. When any of the above conditions is not met, the required adjustment value is calculated.

[0026] Preferably, the formula for the data processing unit to calculate the roll gap adjustment amplitude Tzfd is as follows:

[0027] Tzfd = Sdjz - Kfjz

[0028] In the formula, Tzfd represents the roll gap adjustment amplitude, Sdjz represents the average value of the target roll gap thickness set according to the process requirements and historical data, and Kfjz represents the average roll gap thickness.

[0029] Preferably, the formula for the data processing unit to calculate the roll gap adjustment speed Ktsd is as follows:

[0030]

[0031] In the formula, Ktsd represents the roll gap adjustment speed, Tzfd represents the roll gap adjustment amplitude, and Ydsj represents the predetermined adjustment time.

[0032] Preferably, the formula for the data processing unit to calculate the roll gap adjustment direction Ktfx is as follows:

[0033]

[0034] In the formula, Ktfx represents the roll gap adjustment direction, +1 indicates adjustment and thickening in the increasing direction, and -1 indicates adjustment and thinning in the decreasing direction.

[0035] A high-precision roll gap adjustment method for a pickling and rolling work roll includes the following steps:

[0036] S1. The temperature acquisition unit uses a temperature sensor to collect roll gap temperature data, the pressure acquisition unit uses a pressure sensor to collect inter-roll pressure data, and the thickness acquisition unit uses a thickness sensor to collect roll gap thickness data. The above collected data is stored in the system database;

[0037] S2. Process and analyze the transmitted data, calculate the average roll gap thickness Kfjz, the roll gap thickness variance Khfc, the roll gap skewness Kfpd, and the standard roll gap temperature Kbwd. After the calculation is completed, perform a preliminary analysis and judgment on the calculated values. When the calculated values do not meet the system expectations, calculate the roll gap adjustment amplitude Tzfd, the roll gap adjustment speed Ktsd, and the roll gap adjustment direction Ktfx and transmit them to the control and execution unit;

[0038] S3. Generate corresponding control instructions according to the roll gap adjustment amplitude, the roll gap adjustment speed, and the roll gap adjustment direction, and perform actual adjustment of the roll gap according to the above instructions;

[0039] S4. After the roll gap adjustment is completed, monitor the state of the adjusted roll gap. When the adjusted roll gap still does not meet the actual use requirements, feedback the information to S2 for a new round of data processing and calculation.

[0040] Compared with the prior art, the present invention provides a high-precision roll gap adjustment system and adjustment method for a pickling and rolling work roll, having the following beneficial effects:

[0041] The present invention collects roll gap temperature data, inter-roll pressure data, and roll gap thickness data through a temperature sensor, a pressure sensor, and a thickness sensor. The data processing unit processes and analyzes the transmitted data, calculates the average roll gap thickness Kfjz, the roll gap thickness variance Khfc, the roll gap skewness Kfpd, and the standard roll gap temperature Kbwd. After the calculation is completed, a preliminary analysis and judgment are performed on the calculated values. When the calculated values do not meet the system expectations, the roll gap adjustment amplitude Tzfd, the roll gap adjustment speed Ktsd, and the roll gap adjustment direction Ktfx are calculated and transmitted to the control and execution unit. The control and execution unit generates corresponding control instructions based on the roll gap adjustment amplitude, the roll gap adjustment speed, and the roll gap adjustment direction, and performs the actual adjustment of the roll gap according to the above instructions. After the roll gap adjustment is completed, the feedback monitoring module monitors the state of the adjusted roll gap. When the adjusted roll gap still does not meet the actual usage requirements, the information is fed back to the data processing module for a new round of data processing and calculation. Control instructions are generated through the automatically calculated roll gap adjustment amplitude, speed, and direction, and automated adjustment is achieved, reducing human intervention and improving the accuracy and consistency of the roll gap adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of the system flow of the present invention;

[0043] Figure 2 is a schematic diagram of the method steps of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Aiming at the problem that traditional roll gap adjustment often relies on manual operation, is easily affected by the skills, experience, and judgment of operators, and may lead to unstable adjustment effects, a high-precision roll gap adjustment system for acid rolling work rolls is proposed. Please refer to Figure 1 , the system includes a temperature acquisition unit, a pressure acquisition unit, a thickness acquisition unit, a data processing unit, a control and execution unit, and a feedback monitoring unit;

[0046] The temperature acquisition unit uses high-precision thermocouple temperature sensors to monitor the temperature changes of the roll gap in real time. Through digital signal processing technology, these sensors can provide fast and accurate temperature data and transmit it to the data processing unit. At the same time, the pressure acquisition unit uses strain-type pressure sensors to continuously monitor the pressure between the rolls. These sensors have high sensitivity and rapid response capabilities, ensuring that they can capture minute pressure fluctuations, thereby providing real-time guarantee for the stability of the roll gap. In addition, the thickness acquisition unit combines laser ranging technology or ultrasonic measurement and uses high-precision thickness sensors to perform non-contact detection of the roll gap thickness. This detection method not only improves the measurement accuracy, reduces the wear of the equipment, but also can operate stably in a high-speed production environment. The above units transmit the acquired data in real time through a wireless network, forming an efficient data acquisition and transmission system, providing basic data support for subsequent data processing and roll gap adjustment;

[0047] The data processing unit processes and analyzes the transmitted data, calculates the average value Kfjz of the roll gap thickness, the variance Khfc of the roll gap thickness, the skewness Kfpd of the roll gap, and the standard temperature Kbwd of the roll gap, where:

[0048] The calculation formula for the average value of the roll gap thickness is as follows:

[0049]

[0050] Taking the average value as a benchmark helps to determine whether the current roll gap thickness level meets the production requirements. By comparing with the target thickness set in production, a decision on whether adjustment is needed can be made quickly. In the formula, Kfjz represents the average value of the roll gap thickness, N represents the total number of roll gap thickness data obtained, Kdhd represents the roll gap thickness value of each sample, and i represents the counting subscript. Calculating the average value can help to detect the overall deviation in the production process, thereby reducing the number of unqualified products and improving product quality;

[0051] The calculation formula for the variance of the roll gap thickness is as follows:

[0052]

[0053] The variance can be used to evaluate the consistency of the roll gap thickness. A lower variance indicates a higher stability of the rolling process. When the variance is too large, it may indicate problems in the production process. Adjusting the process parameters in a timely manner can improve production stability. In the formula, Khfc represents the variance of the roll gap thickness, N represents the total number of roll gap thickness data obtained, and i represents the counting subscript. By reducing the thickness fluctuation, the rework and material waste caused by unqualified products can be reduced, thereby increasing the overall output;

[0054] The formula for calculating the skewness of the roll gap is as follows:

[0055]

[0056] The skewness of the roll gap thickness provides information about the thickness distribution pattern, which can help determine the skewness degree of the data distribution. By analyzing the skewness, the operator can take corresponding measures, such as adjusting the rolling pressure or speed, to ensure the rationality of the product size. In the formula, Kfpd represents the roll gap skewness, N represents the total number of roll gap thickness data obtained, Kdhd i represents the roll gap thickness value of each sample, i represents the counting subscript, Kfjz represents the mean value of the roll gap thickness, and Khfc represents the variance of the roll gap thickness. represents the standard deviation of the roll gap thickness. The skewness value can reveal the skewness of the thickness distribution. If the skewness is positive, it indicates that the proportion of the thicker rolling part is relatively large, which may lead to some product quality problems. Understanding the skewness of the thickness distribution can provide a reference for product design to ensure that the design conforms to the actual production situation;

[0057] The calculation formula for the standard temperature of the roll gap is as follows:

[0058] Kbwd = Scwd + α * (Mbwd - Scwd)

[0059] By monitoring the standard temperature, ensure that the rolling process is within an appropriate temperature range, reduce the material property fluctuations caused by temperature changes. Controlling the temperature within a reasonable range can reduce mechanical wear and thermal fatigue and extend the service life of the equipment. In the formula, Kbwd represents the standard temperature of the roll gap, Scwd represents the actually measured roll gap temperature, α represents the linear thermal expansion coefficient of the material, expressed in 1 / k, and this value is obtained from the material handbook. Mbwd represents the target standard temperature, determined by the production process technical specification. By maintaining operation at the standard temperature, it helps improve production efficiency and reduce energy consumption, thus achieving more sustainable production;

[0060] Judgment is made based on the above values, and the conditions are as follows:

[0061] The absolute value of the mean of the roll gap thickness |Kfjz - 1.0| > 0.05, the variance of the roll gap thickness Khfc > 0.0025, the absolute value of the roll gap skewness |Kfpd| > 0.5, the standard temperature of the roll gap Kbwd < 200 or Kbwd > 300. When any of the above conditions is not met, at this time, it is necessary to calculate the roll gap adjustment amplitude Tzfd, the roll gap adjustment speed Ktsd, and the roll gap adjustment direction Ktfx, where:

[0062] The calculation formula for the roll gap adjustment amplitude is as follows:

[0063] Tzfd = Sdjz - Kfjz

[0064] By knowing the specific adjustment range required, the operator can make fine adjustments, reducing material waste and quality defects caused by improper roll gap settings. According to different production requirements and material characteristics, adjust the range in a timely manner to ensure product consistency and compliance with specifications. In the formula, Tzfd represents the roll gap adjustment range, Sdjz represents the mean of the target roll gap thickness set through process requirements and historical data, and Kfjz represents the mean roll gap thickness. Accurate calculation of the adjustment range can prevent processing problems caused by excessive or insufficient adjustments, thereby reducing equipment failure rates and their maintenance costs;

[0065] The calculation formula for the roll gap adjustment speed is as follows:

[0066]

[0067] By controlling the adjustment speed, the deformation and loss of materials during rolling can be reduced, ensuring a higher finished product rate. In the formula, Ktsd represents the roll gap adjustment speed, Tzfd represents the roll gap adjustment range, and Ydsj represents the predetermined adjustment time. Speed control can be optimized in coordination with other production parameters, such as temperature and pressure, to ensure that the entire processing process remains in an ideal state and further improve product quality;

[0068] The calculation formula for the roll gap adjustment direction is as follows:

[0069]

[0070] According to the changes in material characteristics during rolling, adjust the direction in a timely manner to adapt to different production environments and improve the flexibility and adaptability of the system. In the formula, Ktfx represents the roll gap adjustment direction, +1 represents adjustment in the increasing direction to thicken, and -1 represents adjustment in the decreasing direction to thin. At the same time, a reasonable adjustment direction can reduce mechanical shock and wear caused by improper adjustment;

[0071] The control and execution unit plays a crucial role in the high-precision roll gap adjustment system. Its main function is to generate precise control instructions based on real-time feedback data to ensure the efficient adjustment of the roll gap. When generating instructions, the control unit adopts fuzzy control to achieve real-time response and precise regulation for complex dynamic systems. These control instructions are then transmitted to the execution unit through the industrial communication protocol PROFIBUS. The execution unit consists of a servo motor, hydraulic or pneumatic actuators and can accurately execute the adjustment operation. During the execution process, the system continuously monitors the status feedback of the roll gap and compares the actual adjustment situation with the set target to ensure that the adjustment effect meets the expectations. If a deviation is detected, the control and execution unit can automatically adjust the instruction parameters to implement dynamic compensation to ensure the adjustment accuracy and stability of the roll gap. In addition, to improve the safety and reliability of operation, the system also introduces a fault self-diagnosis function to ensure timely shutdown or alarm in case of abnormalities, thus protecting the safety of equipment and operators;

[0072] When the feedback monitoring module detects that the adjusted roll gap still does not meet the actual usage requirements, it will immediately organize the relevant information into a standardized data packet and transmit it to the data processing module through the Modbus network protocol. In the data processing module, these feedback data are comprehensively analyzed to identify the potential errors and deviation sources during the adjustment process. This process not only considers the existing adjustment status but also compares and analyzes the trend of historical data to more accurately calculate the new adjustment amplitude, speed and direction. Based on the analysis results, the data processing module will generate new control instructions in a very short time and feedback these instructions to the control and execution unit to initiate the next round of roll gap adjustment. This closed-loop feedback mechanism ensures the system's dynamic response ability to changes, can adapt to production requirements in a timely manner, effectively improves the stability of the production process and the reliability of product quality. At the same time, the monitoring data is stored in the database for subsequent maintenance analysis and quality traceability, providing data support for the improvement of the production process.

[0073] Please refer to Figure 2 , a high-precision roll gap adjustment method for an acid rolling work roll, comprising the following steps:

[0074] S1. Use a temperature sensor through the temperature acquisition unit to collect roll gap temperature data, use a pressure sensor through the pressure acquisition unit to collect inter-roll pressure data, and use a thickness sensor through the thickness acquisition unit to collect roll gap thickness data. The above collected data are stored in the system database;

[0075] S2. Process and analyze the transmitted data, calculate the average roll gap thickness Kfjz, the variance of roll gap thickness Khfc, the skewness of roll gap Kfpd, and the standard temperature of roll gap Kbwd. After the calculation is completed, conduct preliminary analysis and judgment on the calculated values. When the calculated values do not meet the system expectations, calculate the roll gap adjustment amplitude Tzfd, the roll gap adjustment speed Ktsd, and the roll gap adjustment direction Ktfx and transmit them to the control and execution unit;

[0076] S3. Generate corresponding control instructions according to the roll gap adjustment amplitude, the roll gap adjustment speed, and the roll gap adjustment direction, and perform actual adjustment of the roll gap according to the above instructions;

[0077] S4. After the roll gap adjustment is completed, monitor the state of the adjusted roll gap. When the adjusted roll gap still does not meet the actual usage requirements, feedback the information to S2 for a new round of data processing and calculation.

[0078] Through the combined application of the above system and method, generate control instructions according to the calculated roll gap adjustment amplitude, speed, and direction, and achieve automatic adjustment, reducing human intervention and improving the accuracy and consistency of the roll gap adjustment process.

[0079] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision roll gap adjustment system for pickling work rolls, characterized in that: It includes a temperature acquisition unit, a pressure acquisition unit, a thickness acquisition unit, a data processing unit, a control and execution unit, and a feedback monitoring unit; The temperature acquisition unit acquires roll gap temperature data through a temperature sensor, the pressure acquisition unit acquires roll gap pressure data through a pressure sensor, and the thickness acquisition unit acquires roll gap thickness data through a thickness sensor, and the acquired data are transmitted to the data processing unit through a wireless network; The data processing unit processes and analyzes the transmitted data, calculates the roll gap thickness mean Kfjz, roll gap thickness variance Khfc, roll gap skewness Kfpd and roll gap standard temperature Kbwd, and performs preliminary analysis and judgment on the calculated values ​​after the calculation is completed. When the calculated values ​​do not meet the system expectations, the roll gap adjustment amplitude Tzfd, roll gap adjustment speed Ktsd and roll gap adjustment direction Ktfx are calculated and transmitted to the control and execution unit; The control and execution unit generates corresponding control instructions according to the roll gap adjustment amplitude, roll gap adjustment speed and roll gap adjustment direction, and performs actual adjustment of the roll gap according to the above instructions; After the roll gap is adjusted, the feedback monitoring module monitors the state of the adjusted roll gap. When the adjusted roll gap still does not meet the actual use requirements, the feedback monitoring module feeds back the information to the data processing module for a new round of data processing and calculation.

2. The high-precision roll gap adjustment system for pickling work rolls according to claim 1, characterized in that: The formula for calculating the mean roll gap thickness Kfjz by the data processing unit is as follows: In the formula, Kfjz represents the mean value of the roll gap thickness, N represents the total number of roll gap thickness data obtained, and Kdjd i represents the roll gap thickness value of each sample, and i represents the count subscript.

3. The high-precision roll gap adjustment system for pickling work rolls according to claim 2, characterized in that: The formula for calculating the roll gap thickness variance Khfc by the data processing unit is as follows: In the formula, Khfc represents the roll gap thickness variance, N represents the total number of roll gap thickness data obtained, and i represents the count subscript.

4. The high-precision roll gap adjustment system for pickling work rolls according to claim 3, characterized in that: The formula for calculating the roll gap deflection Kfpd by the data processing unit is as follows: In the formula, Kfpd represents the roll gap skewness, N represents the total number of roll gap thickness data obtained, Kdhdi represents the roll gap thickness value of each sample, i represents the count subscript, Kfjz represents the mean roll gap thickness, Khfc represents the roll gap thickness variance, Indicates the standard deviation of roll gap thickness.

5. The high-precision roll gap adjustment system for pickling work rolls according to claim 4, characterized in that: The formula for calculating the standard roll gap temperature Kbwd by the data processing unit is as follows: Kbwd=Scwd+α*(Mbwd-Scwd) In the formula, Kbwd represents the standard roll gap temperature, Scwd represents the actually measured roll gap temperature, α represents the linear thermal expansion coefficient of the material, expressed as 1 / k. This value can be found in the material manual, and Mbwd represents the target standard temperature, which is determined by the production process technical specifications.

6. A high-precision roll gap adjustment system for pickling work rolls according to claim 5, characterized in that: The data processing unit performs preliminary analysis and judgment on the mean value Kfjz of the roll gap thickness, the variance Khfc of the roll gap thickness, the skewness Kfpd of the roll gap, and the standard temperature Kbwd of the roll gap. The judgment conditions are as follows: The absolute value of the mean roll gap thickness |Kfjz-1.0|>0.05, the variance of the roll gap thickness Khfc>0.0025, the absolute value of the roll gap skewness |Kfpd|>0.5, the standard roll gap temperature Kbwd<200 or Kbwd>300. When any of the above conditions is not met, calculate the required adjustment value.

7. The high-precision roll gap adjustment system for pickling work rolls according to claim 6, characterized in that: The formula for calculating the roll gap adjustment amplitude Tzfd by the data processing unit is as follows: Tzfd=Sdjz-Kfjz In the formula, Tzfd represents the roll gap adjustment amplitude, Sdjz represents the average of the target roll gap thickness set by process requirements and historical data, and Kfjz represents the average roll gap thickness.

8. The high-precision roll gap adjustment system for pickling work rolls according to claim 7, characterized in that: The formula for calculating the roller gap adjustment speed Ktsd by the data processing unit is as follows: In the formula, Ktsd represents the roller gap adjustment speed, Tzfd represents the roller gap adjustment amplitude, and Ydsj represents the predetermined adjustment time.

9. The high-precision roll gap adjustment system for pickling work rolls according to claim 8, characterized in that: The formula for calculating the roll gap adjustment direction Ktfx by the data processing unit is as follows: In the formula, Ktfx represents the roller gap adjustment direction, +1 represents thickening adjustment in the increasing direction, and -1 represents thinning adjustment in the decreasing direction.

10. A high-precision roll gap adjustment method for pickling work rolls, characterized in that: The following steps are involved: S1, using a temperature sensor to collect roll gap temperature data through a temperature collection unit, using a pressure sensor to collect roll gap pressure data through a pressure collection unit, and using a thickness sensor to collect roll gap thickness data through a thickness collection unit, and the above collected data are stored in a system database; S2. Process and analyze the transmitted data, calculate the mean value Kfjz of the roll gap thickness, the variance Khfc of the roll gap thickness, the skewness Kfpd of the roll gap, and the standard temperature Kbwd of the roll gap. After the calculation is completed, perform preliminary analysis and judgment on the calculated values. When the calculated values ​​do not meet the system expectations, calculate the roll gap adjustment amplitude Tzfd, the roll gap adjustment speed Ktsd, and the roll gap adjustment direction Ktfx and transmit them to the control and execution unit; S3, generating corresponding control instructions according to the roll gap adjustment amplitude, roll gap adjustment speed and roll gap adjustment direction, and performing actual adjustment of the roll gap according to the above instructions; S4: After the roll gap is adjusted, the state of the adjusted roll gap is monitored. When the adjusted roll gap still does not meet the actual use requirements, the information is fed back to S2 for a new round of data processing and calculation.

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