Method, device, medium and electronic equipment for improving accuracy of rolling mill press head measurement
By acquiring oil pressure sensor data from the rolling mill's hydraulic circuit and combining it with regression calculation correction coefficients, the problem of inaccurate rolling mill head measurement was solved, enabling rapid diagnosis and timely correction of the head's health status, thus ensuring stable rolling mill operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING SHOUGANG CO LTD
- Filing Date
- 2022-12-01
- Publication Date
- 2026-06-05
AI Technical Summary
When the rolling mill head is in a sub-healthy state, rolling becomes unstable and accidents occur frequently. Existing technologies lack effective online calibration and evaluation methods, and the slow response speed of hydraulic sensors is not fully utilized, resulting in the failure to leverage the advantages of the measurement system.
By acquiring the oil pressure from the oil pressure sensor on the hydraulic circuit of the rolling mill, and combining it with the piston area of the hydraulic cylinder of the rolling mill, the rolling force is calculated. The rolling force on the operating side and the transmission side is acquired under multiple set pressure points. The correction coefficient is determined by regression calculation, the rolling force of the pressure head is corrected, the health status of the pressure head is judged, and an early warning is triggered when a fault occurs.
It enables rapid and accurate assessment of the pressure head's health status, timely correction of rolling force, prevention of production accidents, and ensures stable mill rolling, while reducing equipment maintenance time and quality losses.
Smart Images
Figure CN115921549B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of steel rolling technology, and discloses a method, apparatus, medium and electronic equipment for improving the accuracy of rolling mill pressure head measurement. Background Technology
[0002] The pressure head is used to measure the rolling force of the rolling mill in real time and feeds it back to the rolling mill control system for AGC thickness control and roll gap setting calculations. While the pressure head provides a fast response to rolling force measurement, meeting the high-frequency response requirements of AGC control, in actual production, factors such as component aging, repair quality, and deterioration of mechanical clearance can cause the pressure head to enter a "sub-healthy" state with large zero-point drift and large measurement slope deviation. This can lead to accidents such as unstable rolling conditions, tailing, under-rolling, overlapping, roll marks, and even strip breakage. The determination of these "sub-healthy" pressure heads has traditionally relied on the intuition of rolling mill workers, lacking online calibration and evaluation methods. Consequently, the identification and resolution of pressure head problems are often controversial and complex, resulting in low efficiency and incomplete problem-solving.
[0003] The rolling mill also has a rolling force measurement system, namely a hydraulic pressure sensor installed on the oil circuit of the AGC hydraulic system. The rolling force is obtained by multiplying the oil pressure by the piston area of the AGC hydraulic cylinder. The disadvantage of using a hydraulic pressure sensor to measure rolling force is its slow response speed, making it unsuitable for high-frequency control systems like AGC. Its advantages are accurate and stable steady-state measurements, fewer external influencing factors, and a low failure rate. Historically, the hydraulic pressure sensor has only been used as an emergency backup system for the pressure head, failing to fully utilize its advantages to compensate for the pressure head's shortcomings, thus undermining the overall advantages of the rolling force measurement system. Therefore, this paper proposes a method to improve the accuracy of rolling mill pressure head measurement. By quickly and accurately determining the health status of the rolling mill pressure head, the measured rolling force can be corrected in a timely manner, allowing for timely detection of pressure head malfunctions and prompt replacement of components to prevent production accidents. Summary of the Invention
[0004] This application relates to the field of steel rolling technology, and discloses a method, apparatus, medium, and electronic equipment for improving the accuracy of rolling mill pressure head measurement. It allows for timely correction of the rolling force measured by the rolling mill pressure head, prompt detection of malfunctions in the rolling mill pressure head, and timely replacement of components to prevent production accidents.
[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0006] According to a first aspect of the present application, a method for improving the accuracy of rolling mill head measurement is provided. The method includes: acquiring the oil pressure of an oil pressure sensor on the hydraulic circuit of the rolling mill, and determining the rolling force of the rolling mill based on the oil pressure; controlling the main drive of the rolling mill to rotate at a set speed, and pressing the rolling mill stepwise against multiple set pressing force points; for each set pressing force point, acquiring the rolling force on the operating side and the drive side of the rolling mill through the oil pressure sensor and the head, respectively, which are a first hydraulic rolling force, a second hydraulic rolling force, a first pressing head rolling force, and a second pressing head rolling force; determining a correction parameter for the rolling force of the rolling mill based on the rolling force on the operating side and the drive side; judging the health status of the pressing head based on the rolling force on the operating side and the drive side; if the pressing head is in an unstable state, correcting the rolling force measured by the pressing head based on the correction parameter.
[0007] In one embodiment of this application, based on the aforementioned scheme, obtaining the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill and determining the rolling force of the rolling mill based on the oil pressure includes: obtaining the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill; obtaining the area of the piston of the hydraulic cylinder of the rolling mill; calculating the product of the oil pressure and the area, and using the product as the rolling force of the rolling mill.
[0008] In one embodiment of this application, based on the aforementioned scheme, determining the correction parameters of the rolling force of the rolling mill based on the rolling force of the rolling mill operating side and the transmission side includes: obtaining a first correction coefficient and a second correction coefficient through regression calculation based on the first hydraulic rolling force and the first pressure head rolling force of the plurality of set pressure points; and obtaining a third correction coefficient and a fourth correction coefficient through regression calculation based on the second hydraulic rolling force and the second pressure head rolling force of the plurality of set pressure points.
[0009] In one embodiment of this application, based on the foregoing scheme, if the pressure head is in an unstable state, the step of correcting the rolling force measured by the pressure head based on the correction parameters includes: correcting the first pressure head rolling force based on the first correction coefficient and the second correction coefficient to obtain a corrected first pressure head rolling force; correcting the second pressure head rolling force based on the third correction coefficient and the fourth correction coefficient to obtain a corrected second pressure head rolling force; and controlling the rolling mill to perform rolling based on the corrected first pressure head rolling force and the corrected second pressure head rolling force.
[0010] In one embodiment of this application, based on the aforementioned scheme, determining the health status of the pressure head based on the rolling forces on the operating side and the transmission side of the mill includes: for each set pressure point, determining the difference between the first hydraulic rolling force and the first pressure head rolling force, and the difference between the second hydraulic rolling force and the second pressure head rolling force, which are respectively the operating side difference and the transmission side difference; based on the operating side difference and the transmission side difference of the plurality of set pressure points, determining the maximum operating side difference and the maximum transmission side difference, which are respectively the first difference and the second difference; and determining the health status of the pressure head based on the first difference and the second difference.
[0011] In one embodiment of this application, based on the aforementioned scheme, determining the health status of the pressure head based on the first difference and the second difference includes: if the first difference is greater than a set threshold, then determining that the pressure head is in a fault state; if the second difference is greater than the set threshold, then determining that the pressure head is in a fault state; if both the first difference and the second difference are less than or equal to the set threshold, then determining that the pressure head is in an unstable state.
[0012] In one embodiment of this application, based on the foregoing scheme, the method further includes: if the pressure head is in a faulty state, triggering an early warning prompt to remind the pressure head to be inspected.
[0013] According to a second aspect of the present application, an apparatus for improving the accuracy of rolling mill head measurement is provided. The apparatus includes: a first determining unit, configured to acquire the oil pressure of an oil pressure sensor on the hydraulic circuit of the rolling mill and determine the rolling force of the rolling mill based on the oil pressure; a control unit, configured to control the main drive of the rolling mill to rotate at a set speed and press the rolling mill against multiple set pressing force points in stages; an acquiring unit, configured to acquire, for each set pressing force point, the rolling forces on the operating side and the drive side of the rolling mill, respectively, through the oil pressure sensor and the head, namely a first hydraulic rolling force, a second hydraulic rolling force, a first head rolling force, and a second head rolling force; a second determining unit, configured to determine a correction parameter for the rolling force of the rolling mill based on the rolling forces on the operating side and the drive side; a judging unit, configured to judge the health status of the head based on the rolling forces on the operating side and the drive side; and a correction unit, configured to correct the rolling force measured by the head based on the correction parameter if the head is in an unstable state.
[0014] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein at least one piece of program code is stored in the computer-readable storage medium, the at least one piece of program code being loaded and executed by a processor to implement the method for improving the accuracy of rolling mill head measurement as described in any of the above embodiments.
[0015] According to a fourth aspect of the present application, an electronic device is provided, the electronic device including one or more processors and one or more memories, the one or more memories storing at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to implement the method for improving the accuracy of rolling mill head measurement as described in any of the above embodiments.
[0016] In the technical solution proposed in this application, the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill is obtained, and the rolling force of the rolling mill is determined based on the oil pressure. The main drive of the rolling mill is controlled to rotate at a set speed, and the rolling mill is pressed against multiple set pressing force points in stages. When reaching each set pressing force point, the rolling force on the operating side and the drive side of the rolling mill is obtained through the oil pressure sensor and the press head, respectively, which are the first oil pressure rolling force, the second oil pressure rolling force, the first press head rolling force, and the second press head rolling force. Based on the rolling force on the operating side and the drive side of the rolling mill, a correction parameter for the rolling force of the rolling mill is determined, and the health status of the press head is judged. If the press head is in an unstable state, the rolling force measured by the press head is corrected based on the correction parameter. The technical solution proposed in this application can evaluate and correct the rolling force measured by the press head, thereby ensuring the stability of rolling mill rolling and avoiding various rolling defects.
[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:
[0019] Figure 1 A flowchart of a method for improving the measurement accuracy of rolling mill pressure heads according to an embodiment of this application is shown;
[0020] Figure 2 A flowchart illustrating a method for improving the measurement accuracy of rolling mill pressure heads according to a specific embodiment of this application is shown;
[0021] Figure 3 A block diagram of an apparatus for improving the accuracy of rolling mill head measurement according to an embodiment of this application is shown;
[0022] Figure 4 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation
[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.
[0024] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0025] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0026] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.
[0027] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.
[0029] The implementation details of the technical solutions in the embodiments of this application are described in detail below:
[0030] Figure 1 A flowchart of a method for improving the accuracy of rolling mill head measurement according to an embodiment of this application is shown.
[0031] like Figure 1 As shown, the method for improving the accuracy of rolling mill pressure head measurement includes at least steps 110 to 160.
[0032] The following will be about Figure 1 Steps 110 to 160 are described in detail below:
[0033] In step 110, the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill is obtained, and the rolling force of the rolling mill is determined based on the oil pressure.
[0034] Continue to refer to Figure 1 In step 120, the main drive of the rolling mill is controlled to rotate at a set speed, and the rolling mill is pressed against multiple set pressing force points in stages.
[0035] In this application, the main drive of the rolling mill is controlled to rotate at a set speed. The set speed can be set according to actual needs, and can be 15% of the rated speed of the rolling mill or 20% of the rated speed of the rolling mill.
[0036] In this application, the rolling mill can be controlled to descend by hydraulic cylinders to achieve step-by-step pressing against various set pressing points. The number and specific values of the set pressing points can be set according to actual needs. When the rolling force of the rolling mill reaches the set value, the rolling mill position is the set pressing point corresponding to that rolling force value. For example, five set pressing points can be set, with corresponding rolling forces of 2000kN, 4000kN, 6000kN, 8000kN, and 10000kN.
[0037] Continue to refer to Figure 1 In step 130, for each set pressure point, the rolling forces on the operating side and transmission side of the mill are obtained by the hydraulic pressure sensor and the pressure head, respectively, which are the first hydraulic rolling force, the second hydraulic rolling force, the first pressure head rolling force and the second pressure head rolling force.
[0038] In this application, when the rolling mill reaches each set pressure point, the rolling force on the operating side and the transmission side of the rolling mill can be obtained through the hydraulic pressure sensor and the pressure head, respectively. The operation backend connected to the rolling mill can also automatically record the rolling force data obtained through the hydraulic pressure sensor and the pressure head.
[0039] Continue to refer to Figure 1 In step 140, a correction parameter for the rolling force of the mill is determined based on the rolling force on the operating side and the drive side of the mill.
[0040] Continue to refer to Figure 1 In step 150, the health status of the pressure head is determined based on the rolling forces on the mill operating side and the drive side.
[0041] Continue to refer to Figure 1 In step 160, if the pressure head is in an unstable state, the rolling force measured by the pressure head is corrected based on the correction parameters.
[0042] In one embodiment of this application, obtaining the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill and determining the rolling force of the rolling mill based on the oil pressure includes: obtaining the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill; obtaining the area of the piston of the hydraulic cylinder of the rolling mill; calculating the product of the oil pressure and the area, and using the product as the rolling force of the rolling mill.
[0043] In this application, the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill is obtained. The hydraulic circuit is connected to the AGC hydraulic cylinder of the rolling mill. The oil pressure on the hydraulic circuit closer to the hydraulic cylinder is closer to the pressure of the hydraulic cylinder. Therefore, obtaining the oil pressure on the hydraulic circuit closer to the hydraulic cylinder can make the calculated rolling force of the rolling mill more accurate. The area of the piston of the hydraulic cylinder is obtained, and the product of the oil pressure and the area is calculated. The product is used as the rolling force of the rolling mill. The calculation formula is as follows:
[0044] F = P·S,
[0045] Where F is the rolling force of the rolling mill, P is the oil pressure of the oil pressure sensor in the hydraulic circuit of the rolling mill, and S is the area of the hydraulic cylinder piston.
[0046] In one embodiment of this application, determining the correction parameters of the rolling force based on the rolling force on the operating side and the transmission side of the rolling mill includes: obtaining a first correction coefficient and a second correction coefficient through regression calculation based on the first hydraulic rolling force and the first pressure head rolling force of the plurality of set pressure points; and obtaining a third correction coefficient and a fourth correction coefficient through regression calculation based on the second hydraulic rolling force and the second pressure head rolling force of the plurality of set pressure points.
[0047] In this application, the formulas for calculating the first and second correction coefficients during regression are as follows:
[0048] F1 = a1 + b1 * F3,
[0049] Wherein, F1 is the first hydraulic rolling force, a1 is the first correction coefficient, b1 is the second correction coefficient, and F3 is the first pressure head rolling force.
[0050] In this application, the formulas for calculating the third and fourth correction coefficients in regression are as follows:
[0051] F2 = a2 + b2 * F4,
[0052] Wherein, F2 is the second hydraulic rolling force, a2 is the third correction coefficient, b2 is the fourth correction coefficient, and F4 is the second pressure head rolling force.
[0053] In this application, based on the rolling force data of the multiple set pressing points, a first correction coefficient, a second correction coefficient, a third correction coefficient, and a fourth correction coefficient are calculated through regression analysis.
[0054] In one embodiment of this application, if the pressure head is in an unstable state, the step of correcting the rolling force measured by the pressure head based on the correction parameters includes: correcting the first pressure head rolling force based on the first correction coefficient and the second correction coefficient to obtain a corrected first pressure head rolling force; correcting the second pressure head rolling force based on the third correction coefficient and the fourth correction coefficient to obtain a corrected second pressure head rolling force; and controlling the rolling mill to perform rolling based on the corrected first pressure head rolling force and the corrected second pressure head rolling force.
[0055] In this application, the rolling force on the operating side of the mill can be corrected by the first correction coefficient and the second correction coefficient, and the rolling force on the drive side of the mill can be corrected by the third correction coefficient and the fourth correction coefficient. The corrected rolling force value can be used for mill control.
[0056] In this application, for example, the first correction factor, the second correction factor, the third correction factor, and the fourth correction factor are 30, 0.96, 20, and 0.95, respectively. The rolling forces on the operating side and the drive side of the mill are obtained through the pressure head. The first pressure head rolling force and the second pressure head rolling force are 2000kN and 2050kN, respectively. Then, the corrected first pressure head rolling force and the corrected second pressure head rolling force are 1950kN and 1967.5kN, respectively.
[0057] In one embodiment of this application, determining the health status of the pressure head based on the rolling forces on the operating side and the transmission side of the mill includes: for each set pressure point, determining the difference between the first hydraulic rolling force and the first pressure head rolling force, and the difference between the second hydraulic rolling force and the second pressure head rolling force, which are respectively the operating side difference and the transmission side difference; based on the operating side difference and the transmission side difference of the plurality of set pressure points, determining the maximum operating side difference and the maximum transmission side difference, which are respectively the first difference and the second difference; and determining the health status of the pressure head based on the first difference and the second difference.
[0058] In this application, for each set pressure point, the difference between the rolling forces on the operating side and the transmission side of the mill, obtained through the hydraulic pressure sensor and the pressure head, is calculated. The maximum difference on the operating side and the maximum difference on the transmission side are determined from multiple set pressure points. Based on the maximum difference on the operating side and the maximum difference on the transmission side, the health status of the pressure head is judged. The health status can be divided into a fault state and an unstable state. The fault state is that the pressure head may have problems such as component aging and mechanical clearance deterioration, which may lead to unstable rolling conditions and major rolling problems. The unstable state is that the pressure head may have a problem where the measured rolling force deviates from the actual rolling force, and the rolling force measured by the pressure head needs to be corrected.
[0059] In one embodiment of this application, determining the health status of the pressure head based on the first difference and the second difference includes: if the first difference is greater than a set threshold, determining that the pressure head is in a fault state; if the second difference is greater than the set threshold, determining that the pressure head is in a fault state; if both the first difference and the second difference are less than or equal to the set threshold, determining that the pressure head is in an unstable state.
[0060] In this application, the set threshold can be set according to actual needs. The set threshold can be 98kN or 147kN. If the first difference or the second difference is greater than the set threshold, the pressure head is determined to be in a fault state. If the first difference and the second difference are both less than or equal to the set threshold, the pressure head is determined to be in an unstable state.
[0061] In one embodiment of this application, the method further includes: if the pressure head is in a faulty state, triggering an early warning prompt to remind the pressure head to be inspected.
[0062] In this application, if the pressure head is in a faulty state, an early warning prompt is triggered. The early warning prompt can be displayed on the operation backend connected to the rolling mill. The early warning prompt can be an audible prompt, a visual prompt, or a text prompt. After the early warning prompt is triggered, the staff is reminded to inspect the pressure head and replace the faulty parts in a timely manner.
[0063] To enable those skilled in the art to more readily understand this application, reference will be made below. Figure 2 This application will be illustrated by a specific embodiment.
[0064] Figure 2 A flowchart illustrating a method for improving the accuracy of rolling mill head measurement in a specific embodiment of this application is shown.
[0065] Reference Figure 2 The specific steps are as follows: 200
[0066] Step 1: Obtain the oil pressure from the oil pressure sensor on the hydraulic circuit of the rolling mill, and determine the rolling force of the rolling mill based on the oil pressure;
[0067] Step 2: Using the rolling force obtained from the oil pressure sensor as the control input, the rolling is pressed step by step to 5 set pressing force points, the set pressing force points correspond to rolling forces of 2000kN, 4000kN, 6000kN, 8000kN and 10000kN respectively;
[0068] Step 3: After reaching each set pressure point, sample and store the rolling forces on the operating side and drive side of the mill obtained through the pressure head and hydraulic pressure sensor.
[0069] Step 4: Assess the health status of the mill pressure head based on the maximum difference between the pressure head measurement values and the hydraulic pressure sensor values on the operating and drive sides of the mill.
[0070] Step 5: Determine whether the pressure head is in a faulty state. If yes, proceed to step 6; otherwise, proceed to step 7.
[0071] Step 6: Trigger an early warning notification to remind staff to conduct inspections and replace parts promptly;
[0072] Step 7: Correct the rolling force obtained by measuring the pressure head, and use the corrected rolling force for mill control.
[0073] The one or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0074] The technical solution proposed in this application can evaluate and correct the rolling force of the mill head, quickly diagnose whether there is a problem with the head, reduce the step of disassembling the head and returning it to the factory for inspection, greatly shorten the problem-solving time, and thus avoid production and quality losses.
[0075] The technical solution proposed in this application utilizes the characteristics of hydraulic pressure sensors, which provide more accurate and stable steady-state measurements. The hydraulic pressure sensor is used to calibrate the pressure head, providing a reference standard for the rolling force measured by the pressure head. When the deviation between the rolling force measured by the pressure head and the hydraulic pressure sensor exceeds a set threshold, an early warning is triggered, reminding the user to monitor the pressure head's status or replace it promptly.
[0076] The technical solution proposed in this application can maintain stable rolling production even when the pressure head has only a deviation in the measured slope but the overall state is relatively stable. It uses the measurement value of the hydraulic pressure sensor to calibrate and correct the rolling force measured by the pressure head, which is of great significance when rolling mill spare parts are in short supply.
[0077] The technical solution proposed in this application allows for very convenient calibration and evaluation of the pressure head condition during production breaks. Evaluations can be conducted weekly, or even daily or per shift, achieving complete control over the pressure head condition.
[0078] The technical solution proposed in this application can keep the pressure head in good condition, ensure that the head and tail roll gap leveling value is smaller and more stable during the rolling process, and make the head and tail correction and leveling more effective, avoiding defects such as overlapping rolling, unfinished rolling, and roll marks.
[0079] The following describes an apparatus embodiment of this application, which can be used to execute the method for improving the accuracy of rolling mill head measurement according to the first aspect of the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method for improving the accuracy of rolling mill head measurement according to the first aspect of this application.
[0080] Figure 3 A block diagram of an apparatus for improving the accuracy of rolling mill head measurement according to an embodiment of this application is shown.
[0081] like Figure 3 As shown in the embodiment of this application, the device 300 for improving the measurement accuracy of the rolling mill pressure head includes: a first determining unit 301, a control unit 302, an acquisition unit 303, a second determining unit 304, a judgment unit 305, and a correction unit 306.
[0082] The system comprises the following components: a first determining unit 301, used to acquire the oil pressure from the oil pressure sensor on the hydraulic circuit of the rolling mill and determine the rolling force of the rolling mill based on the oil pressure; a control unit 302, used to control the main drive of the rolling mill to rotate at a set speed and press the rolling mill against multiple set pressing points in stages; an acquiring unit 303, used to acquire the rolling forces on the operating side and the drive side of the rolling mill respectively through the oil pressure sensor and the pressing head for each set pressing point, namely, the first hydraulic rolling force, the second hydraulic rolling force, the first pressing head rolling force, and the second pressing head rolling force; a second determining unit 304, used to determine the correction parameters of the rolling force of the rolling mill based on the rolling forces on the operating side and the drive side; a judging unit 305, used to judge the health status of the pressing head based on the rolling forces on the operating side and the drive side; and a correction unit 306, used to correct the rolling force measured by the pressing head based on the correction parameters if the pressing head is in an unstable state.
[0083] In some embodiments of this application, based on the foregoing scheme, the first determining unit 301 is configured to: obtain the oil pressure of the oil pressure sensor on the hydraulic oil circuit of the rolling mill; obtain the area of the hydraulic cylinder piston of the rolling mill; calculate the product of the oil pressure and the area, and use the product as the rolling force of the rolling mill.
[0084] In some embodiments of this application, based on the aforementioned scheme, the second determining unit 304 is configured to: obtain a first correction coefficient and a second correction coefficient through regression calculation based on the first hydraulic rolling force and the first pressure head rolling force of the plurality of set pressing points; and obtain a third correction coefficient and a fourth correction coefficient through regression calculation based on the second hydraulic rolling force and the second pressure head rolling force of the plurality of set pressing points.
[0085] In some embodiments of this application, based on the foregoing scheme, the second determining unit 304 is further configured to: correct the first pressure head rolling force based on the first correction coefficient and the second correction coefficient to obtain the corrected first pressure head rolling force; correct the second pressure head rolling force based on the third correction coefficient and the fourth correction coefficient to obtain the corrected second pressure head rolling force; and control the rolling mill to perform rolling based on the corrected first pressure head rolling force and the corrected second pressure head rolling force.
[0086] In some embodiments of this application, based on the foregoing scheme, the judgment unit 305 is configured to: for each set pressing force point, determine the difference between the first hydraulic rolling force and the first pressing head rolling force, and the difference between the second hydraulic rolling force and the second pressing head rolling force, which are respectively the operation-side difference and the transmission-side difference; based on the operation-side difference and the transmission-side difference of the plurality of set pressing force points, determine the maximum difference on the operation side and the maximum difference on the transmission side, which are respectively the first difference and the second difference; based on the first difference and the second difference, determine the health status of the pressing head.
[0087] In some embodiments of this application, based on the foregoing scheme, the judgment unit 305 is further configured to: determine that the pressure head is in a fault state if the first difference is greater than a set threshold; determine that the pressure head is in a fault state if the second difference is greater than the set threshold; and determine that the pressure head is in an unstable state if both the first difference and the second difference are less than or equal to the set threshold.
[0088] In some embodiments of this application, based on the foregoing scheme, the device further includes a triggering unit, which is used to trigger an early warning prompt if the pressure head is in a faulty state, reminding the pressure head to be inspected and repaired.
[0089] This application also provides a computer program product comprising computer instructions stored in a computer-readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform the method for improving the accuracy of rolling mill head measurement as described in the above embodiments.
[0090] This application also provides a computer-readable medium, which may be included in an electronic device or exist independently without being assembled into an electronic device. The computer-readable storage medium stores at least one line of program code, which is loaded and executed by a processor to implement the method for improving the accuracy of rolling mill head measurement as described in the above embodiments.
[0091] This application also provides an electronic device comprising one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to implement the method for improving the accuracy of rolling mill head measurement as described in any of the above embodiments.
[0092] Figure 4 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.
[0093] It should be noted that, Figure 4 The computer system 400 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.
[0094] like Figure 4 As shown, the computer system 400 includes a Central Processing Unit (CPU) 401, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 402 or programs loaded from storage portion 408 into Random Access Memory (RAM) 403, such as performing the methods described in the above embodiments. The RAM 403 also stores various programs and data required for system operation. The CPU 401, ROM 402, and RAM 403 are interconnected via a bus 404. An Input / Output (I / O) interface 405 is also connected to the bus 404.
[0095] The following components are connected to I / O interface 405: an input section 406 including a keyboard, mouse, etc.; an output section 407 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to I / O interface 405 as needed. A removable medium 411, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 410 as needed so that computer programs read from it can be installed into storage section 408 as needed.
[0096] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 409, and / or installed from removable medium 411. When the computer program is executed by central processing unit (CPU) 401, it performs various functions defined in the system of this application.
[0097] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.
[0098] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0099] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.
[0100] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.
[0101] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application 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.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, touch terminal, or network device, etc.) to execute the method according to the embodiments of this application.
[0102] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.
[0103] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of this application, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.
[0104] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A method for improving the accuracy of rolling mill pressure head measurement, characterized in that, The method includes: The oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill is obtained, and the rolling force of the rolling mill is determined based on the oil pressure; The main drive of the rolling mill is controlled to rotate at a set speed, and the rolling mill is pressed against multiple set pressing force points in stages; For each set pressure point, the rolling forces on the operating side and transmission side of the rolling mill are obtained through the hydraulic pressure sensor and the pressure head, respectively, which are the first hydraulic rolling force, the second hydraulic rolling force, the first pressure head rolling force, and the second pressure head rolling force; Based on the rolling forces on the operating side and the drive side of the mill, the correction parameters for the mill rolling force are determined; The health status of the pressure head is determined based on the rolling forces on the operating side and the transmission side of the mill. If the pressure head is in an unstable state, the rolling force measured by the pressure head is corrected based on the correction parameters; The step of determining the correction parameters for the rolling force of the rolling mill based on the rolling force on the operating side and the transmission side of the rolling mill includes: obtaining a first correction coefficient and a second correction coefficient through regression calculation based on the first hydraulic rolling force and the first pressure head rolling force of the multiple set pressure points; and obtaining a third correction coefficient and a fourth correction coefficient through regression calculation based on the second hydraulic rolling force and the second pressure head rolling force of the multiple set pressure points. If the pressure head is in an unstable state, the rolling force measured by the pressure head is corrected based on the correction parameters, including: correcting the first pressure head rolling force based on the first correction coefficient and the second correction coefficient to obtain a corrected first pressure head rolling force; correcting the second pressure head rolling force based on the third correction coefficient and the fourth correction coefficient to obtain a corrected second pressure head rolling force; and controlling the rolling mill to perform rolling based on the corrected first pressure head rolling force and the corrected second pressure head rolling force.
2. The method according to claim 1, characterized in that, The step of acquiring the oil pressure from the oil pressure sensor on the hydraulic circuit of the rolling mill and determining the rolling force of the rolling mill based on the oil pressure includes: Obtain the oil pressure from the oil pressure sensor on the hydraulic circuit of the rolling mill; Obtain the area of the hydraulic cylinder piston of the rolling mill; Calculate the product of the oil pressure and the area, and use the product as the rolling force of the rolling mill.
3. The method according to claim 1, characterized in that, The determination of the health status of the pressure head based on the rolling forces on the operating side and the drive side of the rolling mill includes: For each set pressure point, the difference between the first hydraulic rolling force and the first pressure head rolling force, and the difference between the second hydraulic rolling force and the second pressure head rolling force are determined, which are the operating side difference and the transmission side difference, respectively. Based on the operating side difference and transmission side difference of the multiple set pressure points, the maximum operating side difference and the maximum transmission side difference are determined, which are the first difference and the second difference, respectively. The health status of the pressure head is determined based on the first difference and the second difference.
4. The method according to claim 3, characterized in that, The step of determining the health status of the pressure head based on the first difference and the second difference includes: If the first difference is greater than a set threshold, the pressure head is determined to be in a faulty state. If the second difference is greater than the set threshold, the pressure head is determined to be in a faulty state. If both the first difference and the second difference are less than or equal to the set threshold, the pressure head is determined to be in an unstable state.
5. The method according to claim 4, characterized in that, The method further includes: If the pressure head is in a faulty state, an early warning will be triggered to remind the pressure head to be inspected and repaired.
6. A device for improving the accuracy of rolling mill pressure head measurement, characterized in that, The device includes: The first determining unit is used to acquire the oil pressure of the oil pressure sensor on the hydraulic circuit of the rolling mill, and to determine the rolling force of the rolling mill based on the oil pressure; The control unit is used to control the main drive of the rolling mill to rotate at a set speed and to press the rolling mill against multiple set pressing force points in stages; The acquisition unit is used to acquire the rolling forces on the operating side and transmission side of the rolling mill for each set pressure point through the hydraulic pressure sensor and the pressure head, namely the first hydraulic rolling force, the second hydraulic rolling force, the first pressure head rolling force, and the second pressure head rolling force. The second determining unit is used to determine the correction parameters of the rolling force of the rolling mill based on the rolling force on the operating side and the transmission side of the rolling mill, including: obtaining a first correction coefficient and a second correction coefficient through regression calculation based on the first hydraulic rolling force and the first pressure head rolling force of the multiple set pressure points; and obtaining a third correction coefficient and a fourth correction coefficient through regression calculation based on the second hydraulic rolling force and the second pressure head rolling force of the multiple set pressure points. The judgment unit is used to determine the health status of the pressure head based on the rolling force on the operating side and the transmission side of the mill. The correction unit is used to correct the rolling force measured by the pressure head based on the correction parameters if the pressure head is in an unstable state. This includes: correcting the first pressure head rolling force based on the first correction coefficient and the second correction coefficient to obtain a corrected first pressure head rolling force; correcting the second pressure head rolling force based on the third correction coefficient and the fourth correction coefficient to obtain a corrected second pressure head rolling force; and controlling the rolling mill to perform rolling based on the corrected first pressure head rolling force and the corrected second pressure head rolling force.
7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to implement the method for improving the accuracy of mill head measurement as described in any one of claims 1 to 5.
8. An electronic device, characterized in that, The electronic device includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to implement the method for improving the accuracy of rolling mill head measurement as described in any one of claims 1 to 5.