A method of roll tension adjustment based on pressure
By breaking down the operation of the roll separator into multiple sub-processes and establishing a tension function using historical data, the tension of the roll material can be precisely adjusted, solving the problem of insufficient tension adjustment accuracy and adaptability on the roll separator and achieving higher tension control accuracy and adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIMACO (BEIJING) IND TECH CO LTD
- Filing Date
- 2024-03-06
- Publication Date
- 2026-06-05
Smart Images
Figure CN118083674B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of data processing technology, and more specifically, to a pressure-based method for adjusting the tension of roll materials. Background Technology
[0002] Pressure-based coil tension control technology is a control method applied during coil processing. It aims to precisely control the tension of the coil by adjusting the pressure applied to it. This technology is commonly used in the conveying and processing of coils on equipment such as roll slitting machines to ensure that the coil maintains appropriate tension throughout the production line, thereby improving product quality and production efficiency.
[0003] In the existing technology, the same functional relationship is used to adjust the tension of the roll material in different processes on the roll separator, which results in low accuracy and adaptability of the roll material tension adjustment.
[0004] Therefore, how to improve the accuracy and adaptability of roll material tension adjustment is a technical problem that needs to be solved. Summary of the Invention
[0005] This invention provides a pressure-based method for adjusting the tension of rolled materials, addressing the technical problems of low accuracy and adaptability in existing rolled material tension adjustment technologies. The method is applied in a roll separator and includes:
[0006] The operation of the roll separator is broken down into multiple sub-processes, and the requirements of each sub-process for the roll material are determined.
[0007] Based on historical data of the roller separator, establish the first function and multiple second functions of tension for each sub-process;
[0008] In each sub-process, the roll tension is first adjusted using the first function for a period of time to obtain all the parameters of the multiple second functions;
[0009] Filter all parameters to obtain the principal parameters, fit the principal parameters of the multiple second functions to obtain the third function;
[0010] Based on the third function, select the unique second function corresponding to each sub-process from among multiple second functions;
[0011] The tension of the roll material is adjusted for the remainder of the subprocess by using the requirements of the roll material for each subprocess and the second function.
[0012] In some embodiments of this application, a first function and multiple second functions for the tension corresponding to each sub-process are established based on historical data of the roller separator, including:
[0013] The historical data of the roller separator is broken down according to the time nodes corresponding to each sub-process to obtain the sub-process data;
[0014] The data from the filtering sub-process is reduced to simplified data, and the first function of tension is established based on the simplified data.
[0015] Multiple second functions of tension are established using subprocess data and simplified data.
[0016] In some embodiments of this application, historical data related to the roller separator is split according to the time node corresponding to each sub-process to obtain sub-process data, including:
[0017] The time node corresponding to the sub-process is recorded as the process node, and the data between two time nodes of the same sub-process is the sub-process data.
[0018] If the interval between two adjacent time points between different subprocesses is long, the data within the interval is obtained and the data is classified into the data of the subprocesses with higher correlation.
[0019] In some embodiments of this application, the data from the filtering sub-process is reduced to simplified data, including:
[0020] Handle missing, duplicate, and outlier values in the subprocess data;
[0021] Redundant data is removed through correlation analysis, and the processed data is verified to ensure that the data meets the expected standards and quality requirements.
[0022] Use charts or visualization tools to conduct a preliminary analysis of the processed data to confirm its reasonableness;
[0023] After all validations passed, the simplified data was obtained.
[0024] In some embodiments of this application, establishing a first function of tension based on simplified data includes:
[0025] Identify the factors that influence pressure and tension. The factor influencing pressure is designated as the first factor, and the factor influencing tension is designated as the second factor.
[0026] The first function is obtained by fitting each first factor, each second factor, and the four parameters of pressure and tension respectively.
[0027] When selecting the first function, determine the factors that have the greatest influence on the first and second factors, thereby determining the first function.
[0028] In some embodiments of this application, multiple second functions of tension are established using subprocess data and simplified data, including:
[0029] By fitting the two parameters, pressure and tension, the basic function is obtained;
[0030] Construct an influence function based on the first and second factors;
[0031] Define the complexity of each sub-process, and select the combination method of the sub-processes based on the complexity;
[0032] The second function is obtained by combining the basic function and the influence function through a combination method.
[0033] In some embodiments of this application, all parameters are filtered to obtain principal parameters, and the principal parameters of the multiple second functions are fitted to obtain a third function, including:
[0034] Obtain all parameter categories for the second function and determine the influence of each parameter category;
[0035] Parameters whose influence exceeds the corresponding threshold are taken as the primary parameters;
[0036] By fitting these key parameters, a third function is obtained.
[0037] In some embodiments of this application, a unique second function corresponding to each sub-process is selected from multiple second functions based on a third function, including:
[0038] Calculate the root mean square error and shape matching degree between the third function and each second function;
[0039] The degree of matching is determined based on the root mean square error and the degree of shape matching.
[0040] The second function with the highest matching degree is selected as the unique second function corresponding to the sub-process.
[0041] In some embodiments of this application, the roll tension is adjusted for the remainder of each sub-process using the requirements of the roll material and a second function, including:
[0042] The tension target range of the subprocess is determined based on the requirements of the subprocess for the roll material;
[0043] If the tension output value of the second function is within the tension target range of the sub-process, then the tension of the roll material will be adjusted for the remaining time of the sub-process using the second function.
[0044] Otherwise, a compensation value is determined based on the deviation between the tension output value range and the tension target range. The second function is modified by the compensation value, and the tension of the roll material is adjusted for the remaining time of this sub-process using the modified second function.
[0045] By applying the above technical solutions, the operation of the roll separator is broken down into multiple sub-processes, and the requirements of each sub-process for the roll material are determined. Based on historical data from the roll separator, a first tension function and multiple second tension functions are established for each sub-process. In each sub-process, the roll material tension is first adjusted using the first function for a period of time to obtain all parameters of the multiple second tension functions. All parameters are then filtered to obtain the principal parameters, which are then fitted to obtain a third tension function. Based on the third tension function, a unique second tension function corresponding to each sub-process is selected from the multiple second tension functions. The roll material tension is then adjusted for the remaining time of each sub-process based on its requirements and the second tension function. This improves the accuracy and adaptability of roll material tension adjustment. Attached Figure Description
[0046] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0047] Figure 1 A schematic flowchart of a pressure-based roll tension adjustment method proposed in an embodiment of the present invention is shown. Detailed Implementation
[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0049] This application provides a pressure-based method for adjusting the tension of rolled materials, applied in a roll separator, such as... Figure 1 As shown, the method includes the following steps:
[0050] Step S101: Divide the operation of the roll separator into multiple sub-processes and determine the requirements of each sub-process for the roll material.
[0051] In this embodiment, the sub-process includes a feeding stage, a conveying stage, a correction stage, a processing stage (cutting, printing, etc.), and a discharging stage.
[0052] Feeding stage: The roll material first enters the roll separator, which is the initial stage of the processing. At this stage, the tension of the roll material may need to be adjusted to ensure that the roll material does not loosen or vibrate during conveying.
[0053] Conveying stage: The roll material is conveyed on a roll separator via a series of rollers. During the conveying stage, the tension of the roll material needs to be adjusted to maintain its taut state and prevent wrinkles or wavy shapes from forming.
[0054] Correction Operation: If the roll material shifts during transport, the correction operation adjusts its position to bring it back onto the correct track. During the correction process, the roll tension may need further adjustment to ensure effective correction.
[0055] Processing Stage (Cutting, Printing, etc.): During the processing stage, the roll separator may perform cutting, printing, or other processing operations. The tension of the roll material may need to be adjusted according to different processing requirements to ensure processing quality.
[0056] Discharge Stage: Finally, the roll material leaves the roll separator and enters the next stage or downstream process. During the discharge stage, the tension of the roll material may need to be adjusted to ensure that it maintains proper tension when being wound up or entering the downstream process.
[0057] In this embodiment, the requirements for the roll material include preventing roll material shifting or deformation and maintaining flatness.
[0058] Step S102: Based on the historical data of the roller separator, establish the first function and multiple second functions of tension corresponding to each sub-process.
[0059] In this embodiment, the historical data of the roll separator includes information such as roll speed, roll diameter, and roll material properties. The first function is a general relationship function; to test the effect of this relationship during the process and select the optimal second function based on the obtained data, the second function is a more detailed relationship function with high control precision. Both functions involve pressure and tension.
[0060] In some embodiments of this application, a first function and multiple second functions for the tension corresponding to each sub-process are established based on historical data of the roller separator, including:
[0061] The historical data of the roller separator is broken down according to the time nodes corresponding to each sub-process to obtain the sub-process data;
[0062] The data from the filtering sub-process is reduced to simplified data, and the first function of tension is established based on the simplified data.
[0063] Multiple second functions of tension are established using subprocess data and simplified data.
[0064] In this embodiment, multiple second functions of tension are established using sub-process data and simplified data. If the simplified data is insufficient to support an accurate fit of the second function, it can be supplemented using sub-process data.
[0065] In some embodiments of this application, historical data related to the roller separator is split according to the time node corresponding to each sub-process to obtain sub-process data, including:
[0066] The time node corresponding to the sub-process is recorded as the process node, and the data between two time nodes of the same sub-process is the sub-process data.
[0067] If the interval between two adjacent time points between different subprocesses is long, the data within the interval is obtained and the data is classified into the data of the subprocesses with higher correlation.
[0068] In this embodiment, the data within the interval is divided into highly correlated sub-process data in order to avoid missing useful data and thus improve utilization.
[0069] In some embodiments of this application, the data from the filtering sub-process is reduced to simplified data, including:
[0070] Handle missing, duplicate, and outlier values in the subprocess data;
[0071] Redundant data is removed through correlation analysis, and the processed data is verified to ensure that the data meets the expected standards and quality requirements.
[0072] Use charts or visualization tools to conduct a preliminary analysis of the processed data to confirm its reasonableness;
[0073] After all validations passed, the simplified data was obtained.
[0074] In some embodiments of this application, establishing a first function of tension based on simplified data includes:
[0075] Identify the factors that influence pressure and tension. The factor influencing pressure is designated as the first factor, and the factor influencing tension is designated as the second factor.
[0076] The first function is obtained by fitting each first factor, each second factor, and the four parameters of pressure and tension respectively.
[0077] When selecting the first function, determine the factors that have the greatest influence on the first and second factors, thereby determining the first function.
[0078] In this embodiment, influencing factors may include roll speed, roller diameter, and roll material properties. To ensure a good fit, only a ternary function is considered to determine the precise tension. Furthermore, to quickly determine which first function is more suitable, only the two most influential factors are considered.
[0079] In some embodiments of this application, multiple second functions of tension are established using subprocess data and simplified data, including:
[0080] By fitting the two parameters, pressure and tension, the basic function is obtained;
[0081] Construct an influence function based on the first and second factors;
[0082] Define the complexity of each sub-process, and select the combination method of the sub-processes based on the complexity;
[0083] The second function is obtained by combining the basic function and the influence function through a combination method.
[0084] In this embodiment, the combination methods include linear combination, nonlinear combination, nested combination, and segmented combination. Different levels of complexity correspond to different combination methods. For example, in the conveying stage, when the roll material is conveyed by rollers, there may be a linear relationship, where the relationship between pressure and tension is relatively simple because the contact between the rollers and the roll material is usually uniform during the conveying stage.
[0085] A simple combination, a linear combination, is as follows:
[0086] ;
[0087] Where T represents tension and P represents pressure. Let Q be the basic function and Q be the transformation coefficient. For the influence function, Here, n represents the influence weight of the first factor, and n is the number of first factors. The weight corresponding to the i-th first factor. For the parameter of the i-th first factor, Here, m represents the influence weight of the second factor, and m is the number of second factors. The weight corresponding to the j-th second factor. Let j be the parameter of the second factor.
[0088] Nonlinear combinations, as follows:
[0089]
[0090] Nested combinations, as follows:
[0091]
[0092] Segmented combinations, different pressure ranges, correspond to different second functions, as follows:
[0093]
[0094] In step S103, in each sub-process, the tension of the roll material is first adjusted for a period of time through the first function to obtain all the parameters of the multiple second functions.
[0095] In this embodiment, the first function is a general relationship function. To test the effect of this relationship in the process and select the optimal second function based on the obtained data, the second function is a more detailed relationship function.
[0096] Step S104: Filter all parameters to obtain the main parameters, fit the main parameters of the multiple second functions to obtain the third function.
[0097] In some embodiments of this application, all parameters are filtered to obtain principal parameters, and the principal parameters of the multiple second functions are fitted to obtain a third function, including:
[0098] Obtain all parameter categories for the second function and determine the influence of each parameter category;
[0099] Parameters whose influence exceeds the corresponding threshold are taken as the main parameters;
[0100] By fitting these key parameters, a third function is obtained.
[0101] In this embodiment, all parameters and key parameters can also be influencing factors.
[0102] Step S105: Select the unique second function corresponding to each sub-process from among the multiple second functions based on the third function.
[0103] In some embodiments of this application, a unique second function corresponding to each sub-process is selected from multiple second functions based on a third function, including:
[0104] Calculate the root mean square error and shape matching degree between the third function and each second function;
[0105] The degree of matching is determined based on the root mean square error and the degree of shape matching.
[0106] The second function with the highest matching degree is selected as the unique second function corresponding to the sub-process.
[0107] In this embodiment, Root Mean Square Error (RMSE) is one of the most common metrics for function similarity. It calculates the square root of the mean of the squared errors of two functions across all data points. The smaller the RMSE, the more similar the two functions are. Dynamic time warping or other shape-matching techniques are used to compare the shape matching degree of the functions.
[0108] The matching degree is determined based on the root mean square error and the degree of shape matching. Taking both factors into account, the matching degree is determined according to their respective weights.
[0109] Step S106: Adjust the roll tension for the remaining time of each sub-process based on the requirements of the roll material and the second function.
[0110] In some embodiments of this application, the roll tension is adjusted for the remainder of each sub-process using the requirements of the roll material and a second function, including:
[0111] The tension target range of the subprocess is determined based on the requirements of the subprocess for the roll material;
[0112] If the tension output value of the second function is within the tension target range of the sub-process, then the tension of the roll material will be adjusted for the remaining time of the sub-process using the second function.
[0113] Otherwise, a compensation value is determined based on the deviation between the tension output value range and the tension target range. The second function is modified by the compensation value, and the tension of the roll material is adjusted for the remaining time of this sub-process using the modified second function.
[0114] In this embodiment, the compensation value is determined based on the deviation between the tension output value range and the tension target range. Different differences correspond to different compensation values, and the second function is modified (added) by the compensation value.
[0115] By applying the above technical solutions, the operation of the roll separator is broken down into multiple sub-processes, and the requirements of each sub-process for the roll material are determined. Based on historical data from the roll separator, a first tension function and multiple second tension functions are established for each sub-process. In each sub-process, the roll material tension is first adjusted using the first function for a period of time to obtain all parameters of the multiple second tension functions. All parameters are then filtered to obtain the principal parameters, which are then fitted to obtain a third tension function. Based on the third tension function, a unique second tension function corresponding to each sub-process is selected from the multiple second tension functions. The roll material tension is then adjusted for the remaining time of each sub-process based on its requirements and the second tension function. This improves the accuracy and adaptability of roll material tension adjustment.
[0116] Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware or by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) and includes several instructions to cause a computer device (such as a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.
[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A pressure-based method for adjusting the tension of rolled materials, applied in a roll separator, characterized in that, include: The operation of the roll separator is broken down into multiple sub-processes, and the requirements of each sub-process for the roll material are determined. Based on historical data of the roller separator, establish the first function and multiple second functions of tension for each sub-process; In each sub-process, the roll tension is first adjusted using the first function for a period of time to obtain all the parameters of the multiple second functions; Filter all parameters to obtain the principal parameters, fit the principal parameters of the multiple second functions to obtain the third function; Based on the third function, select the unique second function corresponding to each sub-process from among multiple second functions; The tension of the roll material is adjusted for the remainder of the subprocess based on the requirements of each subprocess and the unique second function.
2. The pressure-based roll tension adjustment method as described in claim 1, characterized in that, Based on historical data from the roller separator, a first function and multiple second functions for the tension corresponding to each sub-process are established, including: The historical data of the roller separator is broken down according to the time nodes corresponding to each sub-process to obtain the sub-process data; The data from the filtering sub-process is reduced to simplified data, and the first function of tension is established based on the simplified data. Multiple second functions of tension are established using subprocess data and simplified data.
3. The pressure-based roll tension adjustment method as described in claim 2, characterized in that, The historical data of the roller separator is broken down according to the time node corresponding to each sub-process to obtain the sub-process data, including: The time node corresponding to the sub-process is recorded as the process node, and the data between two time nodes of the same sub-process is the sub-process data. If the interval between two adjacent time points between different subprocesses is long, the data within the interval is obtained and the data is classified into the data of the subprocesses with higher correlation.
4. The pressure-based roll tension adjustment method as described in claim 3, characterized in that, The data from the filtering sub-process is reduced to the following: Handle missing, duplicate, and outlier values in the subprocess data; Redundant data is removed through correlation analysis, and the processed data is verified to ensure that the data meets the expected standards and quality requirements. Use visualization tools to conduct a preliminary analysis of the processed data to confirm its reasonableness; After all validations passed, the simplified data was obtained.
5. The pressure-based roll tension adjustment method as described in claim 4, characterized in that, The first function of tension is established based on the simplified data, including: Identify the factors that influence pressure and tension. The factor influencing pressure is designated as the first factor, and the factor influencing tension is designated as the second factor. The first function is obtained by fitting each first factor, each second factor, and the four parameters of pressure and tension respectively. When selecting the first function, determine the factors that have the greatest influence on the first and second factors, thereby determining the first function.
6. The pressure-based roll tension adjustment method as described in claim 5, characterized in that, Multiple second functions of tension are established using subprocess data and simplified data, including: By fitting the two parameters, pressure and tension, the basic function is obtained; Construct an influence function based on the first and second factors; Define the complexity of each sub-process, and select the combination method of the sub-processes based on the complexity; The second function is obtained by combining the basic function and the influence function through a combination method.
7. The pressure-based roll tension adjustment method as described in claim 1, characterized in that, After filtering all parameters, the principal parameters are obtained. The principal parameters of the multiple second functions are then fitted to obtain the third function, which includes: Obtain all parameter categories for the second function and determine the influence of each parameter category; Parameters whose influence exceeds the corresponding threshold are taken as the main parameters; By fitting these key parameters, a third function is obtained.
8. The pressure-based roll tension adjustment method as described in claim 1, characterized in that, Based on the third function, a unique second function is selected from multiple second functions to identify each sub-process, including: Calculate the root mean square error and shape matching degree between the third function and each second function; The degree of matching is determined based on the root mean square error and the degree of shape matching. The second function with the highest matching degree is selected as the unique second function corresponding to the sub-process.
9. The pressure-based roll tension adjustment method as described in claim 1, characterized in that, Adjusting the roll tension for the remainder of each sub-process based on the roll material requirements and the unique second function includes: The tension target range of the subprocess is determined based on the requirements of the subprocess for the roll material; If the tension output value of the unique second function is within the tension target range of the sub-process, then the roll tension is adjusted for the remaining time of the sub-process using the unique second function. Otherwise, a compensation value is determined based on the deviation between the tension output value range and the tension target range. The unique second function is modified by the compensation value, and the tension of the roll material is adjusted for the remaining time of the subprocess using the modified unique second function.