A method of diagnosing a deterioration in the stiffness of a hot rolling mill and related apparatus

Abstract

The application discloses a hot rolling mill rigidity deterioration diagnosis method and related equipment, and relates to the technical field of hot rolling mills, and the method comprises the following steps: acquiring an actual rolling force of a hot rolling mill press head; determining the performance condition of the hot rolling mill press head based on the actual rolling force; and obtaining a diagnosis result of hot rolling mill rigidity deterioration based on the performance condition. The application can accurately judge the performance stability of the press head by monitoring the actual rolling force of the hot rolling mill press head in real time and comparing the actual rolling force with a static calibration value, so that the cause of the hot rolling mill rigidity deterioration can be accurately diagnosed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot rolling mills, in particular to a diagnosis method for rigidity degradation of a hot rolling mill and related equipment. BACKGROUND

[0002] A hot rolling mill is an important device in steel production, and its main function is to process and shape rough steel billets through rolling. With long-time operation, the press head, hydraulic system, rolling mill housing and other components of the hot rolling mill may exhibit rigidity degradation.

[0003] Traditional methods for detecting rigidity degradation of a hot rolling mill rely on periodic maintenance, manual inspection or simple visual inspection, and lack real-time monitoring and analysis of device performance. These methods not only have detection lags and limitations of manual intervention, but also cannot accurately determine the cause of degradation, resulting in the service life of the device not being fully extended and the maintenance cost being continuously increased. Therefore, there is an urgent need for a diagnosis method for rigidity degradation of a hot rolling mill to solve the above problems in the prior art. SUMMARY

[0004] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the detailed description section. The summary section of the present application does not mean to attempt to limit the key features and essential technical features of the claimed technical solution, nor to determine the protection scope of the claimed technical solution.

[0005] In a first aspect, the present application provides a diagnosis method for rigidity degradation of a hot rolling mill, comprising:

[0006] obtaining an actual rolling force of a press head of the hot rolling mill;

[0007] determining a performance condition of the press head of the hot rolling mill based on the actual rolling force;

[0008] obtaining a diagnosis result of rigidity degradation of the hot rolling mill based on the performance condition.

[0009] In some embodiments, determining the performance condition of the press head of the hot rolling mill based on the actual rolling force comprises:

[0010] comparing the actual rolling force with a static calibration value of the press head of the hot rolling mill;

[0011] comparing the actual rolling force with the static calibration value of the press head of the hot rolling mill;

[0012] in a case where an error between the static calibration value and the actual rolling force is greater than or equal to a preset value, determining that the performance condition of the press head is unstable, wherein the preset value is determined based on a model of the press head of the hot rolling mill.

[0013] In some embodiments, based on the performance condition, a hot rolling mill stiffness degradation diagnosis result is obtained, including:

[0014] In the case that the performance condition is unstable and the rolling state of different hot rolling mill press heads is unstable on different hot rolling mills, it is determined that the hot rolling mill stiffness degradation is caused by the hot rolling mill press head; or,

[0015] In the case that the performance condition is unstable and the rolling state of different hot rolling mill press heads is unstable on the same hot rolling mill, it is determined that the hot rolling mill stiffness degradation is caused by other components of the hot rolling mill, wherein the other components include hydraulic cylinders, rolling mill stands and bearing seats.

[0016] In some embodiments, further comprising:

[0017] Based on the sensor data, the rolling state of the hot rolling mill press head is monitored in real time;

[0018] Based on the rolling state, the stiffness degradation trend during the operation of the hot rolling mill is identified.

[0019] In some embodiments, further comprising:

[0020] Collecting full life cycle data of the hot rolling mill press head, wherein the full life cycle data includes warehouse entry information, quality inspection information, warehouse exit information, on-machine use information, rolling state information, off-machine reason information and factory repair information;

[0021] Based on the full life cycle data, a full life cycle record of the hot rolling mill press head is generated to facilitate tracking and management, wherein the hot rolling mill press head is assigned a unique code.

[0022] In some embodiments, further comprising:

[0023] Based on big data analysis and machine learning algorithms, data mining is performed on the full life cycle data to identify the rules in the historical data and predict the performance stability trend of the press head;

[0024] Based on the prediction result, the maintenance plan and equipment management strategy are optimized.

[0025] In some embodiments, further comprising:

[0026] In the case that the performance condition of the hot rolling mill press head is unstable, the hot rolling mill press head is listed in the blacklist, and the hot rolling mill press head is prohibited from being used on the hot rolling mill again and is subjected to scrap processing.

[0027] In a second aspect, the present application provides a hot rolling mill stiffness degradation diagnosis device, comprising:

[0028] A rolling force acquisition unit is configured to acquire the actual rolling force of the hot rolling mill press head.

[0029] A performance condition identification unit determines the performance condition of the hot rolling mill press head based on the actual rolling force;

[0030] A diagnosis result analysis unit obtains a diagnosis result of the hot rolling mill stiffness degradation based on the performance condition.

[0031] In a third aspect, an electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor is configured to implement the steps of the diagnosis method of the hot rolling mill stiffness degradation according to any one of the first aspect when executing the computer program stored in the memory.

[0032] In a fourth aspect, the present application further provides a computer readable storage medium having a computer program stored thereon, and the computer program is executable by a processor to implement the diagnosis method of the hot rolling mill stiffness degradation according to any one of the first aspect.

[0033] In summary, the present application can accurately determine the performance condition of the press head by real-time acquisition of the actual rolling force of the hot rolling mill press head and analysis of the performance stability of the press head combined with the static calibration value, and further quickly diagnose the rolling mill stiffness degradation reason, effectively reduce the trial and error amount of finding problems, and greatly shorten the maintenance time. Through comprehensive data analysis, the degradation trend of the press head can be identified in real time, and a basis is provided for maintenance and equipment management, thereby significantly improving the operation stability of the equipment, reducing the failure rate, and optimizing the maintenance strategy. Combined with the whole life cycle data and machine learning technology, the present application can also deeply mine the historical data, predict the future performance change, and take measures in advance to avoid production downtime and quality problems caused by equipment performance degradation, which has high economic value and application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals are used throughout the various drawings to designate similar or equivalent parts. In the drawings:

[0035] Figure 1 A hot rolling mill stiffness degradation diagnosis method flowchart is provided for the embodiments of the present application;

[0036] Figure 2 A first schematic diagram of the process performance of the hot rolling mill press head is provided for the embodiments of the present application;

[0037] Figure 3 A second schematic diagram of the process performance of the hot rolling mill press head is provided for the embodiments of the present application;

[0038] Figure 4 A whole life cycle schematic diagram of the hot rolling mill press head is provided for the embodiments of the present application;

[0039] Figure 5 A structure schematic diagram of a diagnosis device for hot rolling mill rigidity deterioration is provided for the embodiment of the present application.

[0040] Figure 6 A structure schematic diagram of a diagnosis device for hot rolling mill rigidity deterioration is provided for the embodiment of the present application. DETAILED DESCRIPTION

[0041] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, are used for distinguishing between similar objects talking about the embodiments and do not necessarily have to appear in the description or claims of the present application in this particular order. It is to be understood that the use of these terms in the present description is merely intended to clarify the description and does not have to appear in the description or claims of the present application. Moreover, the terms "comprising", "having", "including", and "containing" and any variations thereof used in the present description and in the claims of the present application are intended to cover the respective terms not only in the strict sense, but also in an inclusive sense of equivalents. For example, the process, method, object or device that comprises, has, includes or contains one or more steps, elements, units, units or units, does not have to consist only of the steps or units clearly listed, but can include other steps or units not clearly listed or inherent to such process, method, object or device. The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0042] Please refer to Figure 1 A structure schematic diagram of a diagnosis method for hot rolling mill rigidity deterioration is provided for the embodiment of the present application, which can specifically include:

[0043] S110, acquiring an actual rolling force of a press head of the hot rolling mill;

[0044] For example, during the operation of the hot rolling mill, the actual rolling force of the press head is an important basis for evaluating the running state of the rolling mill. The rolling force is the force exerted on the roll by the strip during rolling, and its size and change reflect the stress condition inside the rolling mill. Since the hot rolling process involves a high-temperature, high-speed metal deformation process, factors such as uneven material quality of the strip, thickness variation and fluctuation of rolling speed will cause the rolling force to change dynamically. For example, when the hardness of the strip differs at different positions, the pressure on the roll will change accordingly during rolling, and this change will be directly transmitted to the press head, causing the actual rolling force on the press head to be in a state of continuous change.

[0045] In addition, the balance of the actual rolling forces of the two side shoes is crucial to the stability of the rolling process. Once the actual rolling forces of the two side shoes deviate too much, the rolling mill will be unevenly stressed, which will in turn cause serious problems such as strip deviation and even rolling waste. For example, if the actual rolling force measured by one side shoe is much higher than that of the other side, the control system will make adjustments according to the wrong rolling force data, causing the roll gap to deviate, and ultimately causing the strip to deviate from the normal trajectory during rolling. Therefore, accurately obtaining the actual rolling forces of the two side shoes and comparing them is also one of the key links to ensure the normal operation of the rolling mill.

[0046] S120, determining the performance of the hot rolling mill shoe based on the actual rolling force;

[0047] For example, when determining the performance of the hot rolling mill shoe, the key is to accurately compare the actual rolling force with the static calibration value of the shoe. When the error between the actual rolling force and the static calibration value is greater than or equal to the preset value determined based on the shoe model, it can be judged that the shoe performance is unstable. This is because in the dynamic rolling environment, the stability of the strain gauge and the wire inside the shoe is challenged, and it may not be able to accurately convert the change in rolling force into an accurate measurement signal; at the same time, the steel shell of the shoe as a key component for pressure transmission, its elastic performance may change in the long-term stress process, thereby affecting the accuracy of pressure transmission, ultimately leading to a large deviation between the measured rolling force and the actual value.

[0048] In some cases, by adjusting the gain slope of the control program on site, the rolling mill can maintain operation in the short term, but this cannot cover up the possible defects of the shoe performance. For example, in the scenario where the actual rolling forces of the two side shoes of the rolling mill deviate greatly, the measured value of one side shoe deviates significantly from the actual value, which will cause the control system to receive false feedback information, thereby causing false adjustment of the roll gap, seriously affecting the rolling quality of the strip and the running stability of the rolling mill. Therefore, continuously and accurately monitoring the actual rolling force and comparing it with the static calibration value has key significance for accurately determining the cause of the degradation of the rolling mill stiffness.

[0049] S130, obtaining a diagnosis result of the degradation of the stiffness of the hot rolling mill based on the performance.

[0050] For example, when it is determined that the performance of the hot rolling mill press head is unstable, further investigation of its performance on different hot rolling mills is required. If the press head causes the rigidity of the mill to deteriorate and the rolling state to be unstable on multiple different hot rolling mills, it can be basically determined that the press head itself has a serious problem. This is because if only the local working condition of a certain mill is abnormal, the press head will not have similar failures on different mills. In this case, the press head may have defects in manufacturing process, material durability, etc., and even after repair and static calibration, it cannot accurately measure the rolling force in the actual dynamic rolling process, resulting in loss of control of the rigidity of the mill, and it must be replaced and added to the blacklist to prevent it from being used again.

[0051] On the contrary, if the rolling instability occurs on the same mill regardless of which press head is replaced, it indicates that the problem is not with the press head, but with other components of the hot rolling mill. For example, the hydraulic cylinder may have a seal failure or internal part wear, causing unstable pressure output; the window surface of the mill housing may be worn or corroded, changing the support conditions of the rolls and affecting the rigidity of the entire mill; wear of the bearing seat may cause the roll to rotate smoothly, causing rolling force fluctuations. The failure of these components will interfere with the normal operation of the mill, causing the rigidity of the mill to deteriorate, and at this time, these components need to be thoroughly inspected, repaired or replaced to restore the normal performance of the mill.

[0052] Finally, through accurate judgment of the performance of the press head and in-depth analysis of different situations, the root cause of the rigidity deterioration of the hot rolling mill can be quickly and accurately determined. This not only greatly reduces the time and labor cost of traditional component-by-component troubleshooting, improves maintenance efficiency, but also effectively avoids product quality decline and production loss caused by long-term downtime for repair and incorrect repair, ensures the stable operation of the hot rolling mill, and improves the economic benefits and product quality of steel production.

[0053] In some examples, determining the performance of the hot rolling mill press head based on the actual rolling force includes:

[0054] comparing the actual rolling force with a static calibration value of the hot rolling mill press head;

[0055] comparing the actual rolling force with a static calibration value of the hot rolling mill press head;

[0056] In the case where the error between the static calibration value and the actual rolling force is greater than or equal to a preset value, determining that the performance of the hot rolling mill press head is unstable, wherein the preset value is determined based on the model of the hot rolling mill press head.

[0057] For example, during the operation of the hot rolling mill, accurately determining the performance of the press head is crucial for evaluating the rigidity degradation of the rolling mill. When the error between the static calibration value and the actual rolling force is greater than or equal to a preset value determined based on the model, it is determined that the performance of the press head is unstable. This is because the strain gauges and wiring inside the press head need to cope with complex dynamic rolling force changes in actual working conditions. If the sensitivity of the strain gauges changes over time or under dynamic impact, or if the wiring is loose or aged, it will cause the measured actual rolling force to deviate from the true value, exceeding the preset error range, thereby affecting the accurate control of the rolling process and causing the risk of rigidity degradation of the rolling mill.

[0058] From the perspective of the structure of the press head, the elastic properties of the steel shell may gradually change during long-term exposure to rolling forces. For example, the accumulation of small plastic deformations caused by repeated stress causes changes in the elastic modulus of the shell, which in turn affects the accuracy of pressure transmission. In this case, even if it performs normally at a specific point of static calibration, the measured rolling force at other load points during actual dynamic rolling may deviate significantly from the static calibration value, causing the performance of the press head to be unstable, ultimately affecting the overall rigidity of the hot rolling mill and the rolling quality, so this comparative judgment method is of great significance for timely discovering potential problems in the press head and ensuring the stable operation of the rolling mill.

[0059] In some examples, based on the performance, a hot rolling mill rigidity degradation diagnosis result is obtained, including:

[0060] In the case where the performance is unstable and the hot rolling mill press head causes rolling state instability on different hot rolling mills, it is determined that the hot rolling mill rigidity degradation is caused by the hot rolling mill press head; or,

[0061] In the case where the performance is unstable and different hot rolling mill press heads cause rolling state instability on the same hot rolling mill, it is determined that the hot rolling mill rigidity degradation is caused by other components of the hot rolling mill, wherein the other components include hydraulic cylinders, rolling mill stands, and bearing seats.

[0062] For example, during the operation of the hot rolling mill, accurately determining the cause of rigidity degradation is crucial for ensuring production. When the performance of the press head is unstable and causes rolling state instability on different hot rolling mills, it can be determined that the press head causes rigidity degradation. Because the working environment and working conditions of different hot rolling mills may differ, but if the same press head has problems on multiple devices, it indicates that the press head itself has serious defects. For example, the manufacturing process of the press head may have flaws, causing the internal sensors or elastic elements to fail to maintain stable performance over time or under different rolling forces, thereby continuously outputting incorrect rolling force measurement values, misleading the rolling mill control system, and ultimately leading to rigidity degradation of the rolling mill, affecting product quality and production efficiency.

[0063] However, when performance instability occurs and different pressure heads produce unstable rolling conditions on the same hot rolling mill, the root cause should be focused on other components of the hot rolling mill. For example, if the piston seal of a hydraulic cylinder malfunctions, it can lead to hydraulic oil leakage, causing unstable pressure transmission within the cylinder. Replacing the pressure head will not change the abnormal rolling condition. Similarly, if the mill stand is subjected to prolonged rolling force and corrosion, the flatness and dimensional accuracy of its windows will change, altering the roll support conditions and affecting the overall rigidity of the mill. Wear on the bearing housings can also cause the roll rotation center to shift, leading to uneven distribution of rolling force. Failures in these components can alter the mill's rigidity characteristics, causing rolling instability. Therefore, these components require detailed inspection and repair.

[0064] like Figure 2 and Figure 3 As shown, Figure 2 and Figure 3 These are schematic diagrams illustrating the process performance of the hot rolling mill press head, showing the rolling status of the SGQG-RZ-C0455450-0005 press head at different process positions. This press head only exhibits rolling instability at position F4, while its condition is good at positions F1 and F5. This indicates that the press head itself may not be the problem; the issue most likely lies with the pressing system components of the F4 rolling mill. These components may have experienced wear and corrosion due to long-term use, affecting the normal operation of the rolling mill. Based on this, arranging for equipment personnel to inspect, repair, or replace components such as the rolling mill stand of the F4 rolling mill will accurately resolve the problem, quickly restore rolling mill performance, and ensure smooth production processes.

[0065] Figure 3 The paper presents the rolling conditions of the F5 rolling mill with different pressure heads installed. The comparison revealed that the F5 rolling mill only experienced instability when using the SGQG-RZ-C045450-0007 pressure head; other pressure heads maintained stability. This confirms that the SGQG-RZ-C045450-0007 pressure head was deteriorating, affecting the mill's performance. Replacing this pressure head promptly restored the rigidity of the F5 rolling mill, ensuring stable operation and preventing product quality issues and reduced production efficiency caused by instability. This demonstrates the importance of accurate diagnosis and timely intervention in equipment maintenance.

[0066] In summary, by comprehensively analyzing the performance of the pressure head and its behavior on different rolling mills, the true cause of the stiffness deterioration of the hot rolling mill can be accurately determined. This avoids blind repairs, improves maintenance efficiency, reduces equipment downtime, ensures the stable operation of the hot rolling mill and the smooth progress of steel production, and saves enterprises a significant amount of manpower, material resources, and time costs.

[0067] In some instances, it also includes:

[0068] monitoring a rolling state of a press head of a hot rolling mill in real time based on sensor data;

[0069] identifying a stiffness degradation trend in the operation of the hot rolling mill based on the rolling state.

[0070] Exemplarily, in the production process of the hot rolling mill, the rolling state of the press head is crucial to the rolling quality and the operational stability of the mill. To monitor the rolling state of the press head in real time, various sensors such as force sensors, temperature sensors and displacement sensors can be used to collect data related to the rolling process. These data are monitored in real time through an advanced data acquisition system and fed back to the central control system. The sensor data can reflect the changes in the force, temperature fluctuations and displacement of the press head, which are key parameters for evaluating the working state of the press head of the hot rolling mill. By analyzing these real-time data, potential abnormal conditions such as press head surface wear, overload or insufficient heating can be detected in a timely manner during the production process, thereby effectively improving the reliability and production efficiency of the rolling process.

[0071] After monitoring the rolling state of the press head of the hot rolling mill, it is necessary to further identify and predict the stiffness degradation trend of the press head. The degradation of the stiffness of the press head is usually manifested as changes in rolling force, increased deformation of the press head, etc. As the performance of the press head deteriorates, the ability of the press head to transmit rolling force during rolling gradually decreases, eventually affecting the stability of the entire rolling process. Based on the data collected by the sensors, a mathematical model can be established to detect the stiffness degradation trend by analyzing multiple parameters such as rolling force, press head deformation, temperature, etc. For example, the change in stiffness can be determined by comparing the deviation between the actual rolling force and the theoretically predicted rolling force. If it is found that this deviation gradually increases, it may be a signal of the decrease in stiffness of the press head.

[0072] Based on the real-time monitoring of the rolling state and the identification of the stiffness degradation trend, precise diagnosis and prediction of the state of the press head of the hot rolling mill can be achieved. Through this method, not only can abnormal changes in the press head be detected in a timely manner, but also the degradation of the stiffness can be predicted in advance to avoid damage to the press head or production interruption due to loss of stiffness during production. In addition, by accumulating standardized test data of different types of press heads, the maintenance and repair plan of the rolling mill can be further optimized to improve the reliability and production efficiency of the production line, thereby reducing maintenance costs in the long run, improving the economy and service life of the hot rolling mill.

[0073] In some examples, further comprising:

[0074] collecting full life cycle data of the press head of the hot rolling mill, wherein the full life cycle data includes warehouse entry information, quality inspection information, warehouse exit information, on-machine use information, rolling state information, off-machine reason information and factory repair information;

[0075] Based on the full life cycle data, a full life cycle record of the hot rolling mill press head is generated for tracking and management, wherein the hot rolling mill press head is assigned a unique code.

[0076] As shown in the example, Figure 4 As shown in the example, a full life cycle schematic of the hot rolling mill press head is shown, and collecting full life cycle data of the hot rolling mill press head is a systematic work that covers information from each stage such as press head warehousing, factory repair, etc. The warehousing information records the initial state and basic attributes of the press head, such as model, specification, supplier, etc. The quality inspection information reflects the quality status of the press head before it is put into use, ensuring that it meets the production requirements and is an important basis for ensuring the reliability of subsequent use. The delivery information clearly shows when the press head enters the production line, which is closely related to the production plan and equipment allocation. The on-machine use information includes various parameters and performance of the press head in actual production, such as working time, rolled strip specifications, etc., which directly reflect the operation of the press head under actual working conditions. The rolling state information involves real-time data such as rolling force and displacement of the press head, which is the key to analyzing the performance of the press head and the state of the rolling mill. The off-machine reason information reveals the reasons for the press head to exit production, which may be normal replacement, fault repair or reaching the service life, etc., providing important clues for subsequent management and maintenance. The factory repair information records the repair process and results of the press head after the problem occurs, which helps to evaluate the repair effect and the remaining life of the press head.

[0077] Based on the collected full life cycle data, it is of great significance to generate a full life cycle record of the hot rolling mill press head. The record is like a "growth record book" of the press head, integrating data from each stage to form a complete information chain for tracking and management. In order to ensure the uniqueness and traceability of the record of each press head, it is a key step to assign a unique code to the hot rolling mill press head. This unique code is like the "identity card number" of the press head, which runs through the entire life cycle of the press head. Whether it is warehousing, delivery, on-machine, off-machine or factory repair, etc., the code can be quickly and accurately associated with the corresponding record to obtain detailed information of the press head. This coding and record generation method makes the management of the press head more standardized and information-based, improves the management efficiency and accuracy, and avoids information confusion and omission.

[0078] By collecting full life cycle data and generating a history file for management, there are many advantages and practical application value. First of all, it helps to realize fine management, and management personnel can accurately master the performance state and historical use of each press head according to the detailed information in the history file, so as to make more reasonable maintenance plan and replacement cycle, avoid over maintenance or insufficient maintenance, and reduce maintenance cost. Secondly, in terms of fault diagnosis and diagnosis, the history file provides rich historical data and background information, which can quickly check the historical record of the relevant press head when a problem occurs, analyze the possible reasons, improve the efficiency and accuracy of fault diagnosis, and shorten the downtime.

[0079] In some examples, it also includes:

[0080] Based on big data analysis and machine learning algorithm, the full life cycle data is mined to identify the rules in the historical data and predict the performance stability trend of the press head;

[0081] Based on the prediction result, the maintenance plan and equipment management strategy are optimized.

[0082] For example, based on big data analysis and machine learning algorithm, the full life cycle data of hot rolling press head is deeply mined, which can effectively identify the potential rules and trends in the historical data. Through the collected full life cycle data of the press head, including the use state, maintenance record, mechanical property data in the rolling process, etc., the performance change rule of the press head under different working conditions can be revealed by using data mining technology. For example, through the cluster analysis of historical data, the wear trend of the press head under different working environment or working condition can be identified, or the performance degradation mode of the press head under certain conditions can be found. Machine learning algorithm, especially supervised learning and time series analysis method, can further analyze these rules and build a prediction model of the performance change of the press head, so as to provide scientific basis for the state evaluation and future maintenance decision of the equipment.

[0083] Based on the prediction result of the historical data, the performance stability trend of the hot rolling press head can be accurately predicted. Through the output of the prediction model, the management personnel can foresee the possible performance decline or fault risk of the press head in advance. For example, if the prediction result shows that the performance of a certain press head will decline sharply in the short term, the management personnel can take targeted measures in advance, such as adjusting the production plan, increasing the maintenance frequency or preparing spare parts. This predictive management method can greatly reduce the probability of sudden failure, reduce the downtime of equipment, optimize the allocation of resources, and ensure the continuity and stability of production. At the same time, the prediction result can also be used as a reference basis for evaluating the replacement or scrapping of the press head, so as to prolong the service life of the equipment.

[0084] Based on the prediction of the performance stability trend of the press head, the maintenance plan and equipment management strategy are optimized. Through accurate performance prediction, maintenance personnel can make more accurate maintenance plans according to the actual running state of the press head, rather than relying on traditional regular maintenance or empirical judgment. This maintenance plan based on data and prediction results can perform maintenance or replace parts at the most appropriate time, avoiding premature or late maintenance operations, reducing maintenance costs and improving equipment utilization. At the same time, the equipment management strategy can also be dynamically adjusted in this way. For example, if the prediction model shows that the failure rate of a certain type of press head is high, the inventory of this type of equipment or the standby press head can be increased to ensure that the production process is not affected. The use of data analysis and machine learning prediction results can help improve the intelligence and accuracy of equipment management, and ultimately achieve efficient and low-cost management of the production process.

[0085] In some examples, further comprising:

[0086] In the case of unstable performance of the hot rolling mill press head, the hot rolling mill press head is listed on the blacklist, and the use of the hot rolling mill press head is prohibited again, and the hot rolling mill press head is scrapped.

[0087] For example, when it is determined that the performance of the press head is unstable during the operation of the hot rolling mill, it means that the measured rolling force data of the press head deviates greatly from the actual situation. This deviation may be caused by various problems in the press head, such as aging or damage of the strain gauge, which makes its sensing of pressure changes no longer accurate; loose or short-circuit wiring can interfere with the transmission of electrical signals, causing measurement errors; deformation or change in the elastic modulus of the steel shell affects the uniformity and accuracy of pressure transmission. These problems will cause the rolling mill control system to receive incorrect rolling force feedback, which will affect the rolling mill's reduction amount adjustment, strip thickness control and other key links, resulting in reduced strip quality, uneven thickness, surface defects and other problems, which will seriously affect production efficiency and product quality, so measures must be taken for unstable press heads.

[0088] Listing the press head with unstable performance on the blacklist and prohibiting its use again is a key step to ensure stable production. If the unstable press head is allowed to continue to be used, its unreliable measurement data will continue to interfere with the normal operation of the rolling mill, increasing the risk of equipment failure and the complexity of maintenance. For example, when rolling high-precision strip steel, inaccurate rolling force measurement may cause the rolling mill to be over-reduced or under-reduced, resulting in strip thickness precision exceeding the allowed range and generating a large amount of waste. Moreover, repeated use of unstable press heads may further damage other components of the rolling mill, such as bearings, which are subjected to excessive unbalanced forces due to incorrect rolling force, accelerating their wear and increasing the overall maintenance cost of the equipment. Therefore, prohibiting its use again is to eliminate potential production hazards from the source.

[0089] Please refer to Figure 5A structure schematic diagram of a hot rolling mill rigidity deterioration diagnosis device provided by an embodiment of the present application comprises:

[0090] A rolling force acquisition unit 21 is configured to acquire an actual rolling force of a hot rolling mill press head.

[0091] A performance condition identification unit 22 is configured to determine a performance condition of the hot rolling mill press head based on the actual rolling force.

[0092] A diagnosis result analysis unit 23 is configured to obtain a diagnosis result of the hot rolling mill rigidity deterioration based on the performance condition.

[0093] Please refer to Figure 6 An embodiment of the present application further provides an electronic device 300, which comprises a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and capable of running on the processor, and the processor 320 implements the steps of any method of the hot rolling mill rigidity deterioration diagnosis device when executing the computer program 311.

[0094] Since the electronic device introduced in the embodiment is the device used for implementing the hot rolling mill rigidity deterioration diagnosis device in the embodiment of the present application, the specific implementation of the electronic device in the embodiment and its various changes can be understood by those skilled in the art based on the method introduced in the embodiment of the present application, so the implementation of the electronic device in the method in the embodiment of the present application will not be introduced in detail, and the device used for implementing the method in the embodiment of the present application by those skilled in the art belongs to the scope of the present application.

[0095] In the implementation process, the computer program 311 can implement any embodiment in the first aspect when executed by the processor.

[0096] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in an embodiment can be referred to the related description of other embodiments.

[0097] Those skilled in the art should understand that the embodiments of the present application can provide methods, systems or computer program products. Therefore, the present application can adopt a completely hardware embodiment, a completely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can adopt a computer program product in the form of one or more computer readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer readable program code.

[0098] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart Figure 1 one or more flows and / or blocks. Figure 1 one or more flows and / or blocks.

[0099] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart Figure 1 one or more flows and / or blocks. Figure 1 one or more flows and / or blocks.

[0100] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart Figure 1 one or more flows and / or blocks. Figure 1 one or more flows and / or blocks.

[0101] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart

[0102] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that the computer can store or be integrated into a data storage device such as a server, data center, etc. containing one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)) and the like.

[0103] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0104] In several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the apparatus embodiments described above are only schematic. The division of the units is only a logical function division. In actual implementation, additional division can be made, for example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0105] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0106] In addition, each of the function units in each of the embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0107] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in each of the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0108] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

[0109] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0110] Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application belong to the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and changes.

Claims

1. A method for diagnosing stiffness deterioration in a hot rolling mill, characterized in that, The method includes: Obtain the actual rolling force of the hot rolling mill pressure head; Based on the actual rolling force, the performance of the hot rolling mill pressure head is determined, including: The actual rolling force is compared with the static calibration value of the hot rolling mill pressure head; If the error between the static calibration value and the actual rolling force is greater than or equal to a preset value, the performance of the hot rolling mill head is determined to be unstable, wherein the preset value is determined based on the model of the hot rolling mill head; Based on the aforementioned performance conditions, the diagnostic results of the hot rolling mill stiffness deterioration are obtained, including: If the performance condition is unstable and the hot rolling mill head experiences unstable rolling conditions on different hot rolling mills, it is determined that the hot rolling mill stiffness degradation is caused by the hot rolling mill head; or, When the performance condition is unstable and different hot rolling mill heads experience unstable rolling conditions on the same hot rolling mill, it is determined that the hot rolling mill stiffness deterioration is caused by other components of the hot rolling mill, including hydraulic cylinders, mill stands, and bearing housings.

2. The method according to claim 1, characterized in that, Also includes: Based on sensor data, the rolling status of the hot rolling mill pressure head is monitored in real time; Based on the rolling state, the stiffness degradation trend during the operation of the hot rolling mill is identified.

3. The method according to claim 1, characterized in that, Also includes: Collect the full life cycle data of the hot rolling mill pressure head, wherein the full life cycle data includes warehousing information, quality inspection information, outbound information, on-machine usage information, rolling status information, off-machine reason information, and return-to-factory repair information; Based on the full lifecycle data, a full lifecycle history file for the hot rolling mill head is generated for tracking and management, wherein the hot rolling mill head is assigned a unique code.

4. The method according to claim 3, characterized in that, Also includes: Based on big data analysis and machine learning algorithms, data mining is performed on the entire life cycle data to identify patterns in historical data and predict the stable trend of pressure head performance. Based on the forecast results, optimize maintenance plans and equipment management strategies.

5. The method according to claim 1, characterized in that, Also includes: If the performance of the hot rolling mill head is unstable, the hot rolling mill head will be blacklisted, prohibited from being used on the hot rolling mill again, and scrapped.

6. A diagnostic device for stiffness deterioration of a hot rolling mill, used to implement the method according to any one of claims 1 to 5, characterized in that, include: The rolling force acquisition unit is used to acquire the actual rolling force of the hot rolling mill pressure head; The performance condition identification unit determines the performance condition of the hot rolling mill pressure head based on the actual rolling force. The diagnostic result analysis unit obtains the diagnostic result of the hot rolling mill stiffness deterioration based on the performance conditions.

7. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program stored in the memory, implements the steps of the diagnostic method for hot rolling mill stiffness deterioration as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the diagnostic method for hot rolling mill stiffness deterioration as described in any one of claims 1-5.

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