Rolling mill state diagnosis method, system and equipment for flat rolling mill and medium
By acquiring rolling force deviation and hydraulic cylinder elongation data through forward and reverse operation on the rolling mill, the problem of lagging rolling mill condition assessment was solved, realizing dynamic online diagnosis of rolling mill condition and improving the accuracy of equipment maintenance and production stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING SHOUGANG CO LTD
- Filing Date
- 2025-12-03
- Publication Date
- 2026-04-28
AI Technical Summary
In existing technologies, rolling mill condition assessment relies on periodic offline measurements, which cannot capture changes in equipment condition caused by wear, iron oxide scale accumulation, etc. during long-term operation, resulting in assessment results that cannot truly reflect the equipment condition in production.
By controlling the mill to operate in both forward and reverse directions, rolling force deviation data and hydraulic cylinder elongation data are obtained within the same preset rolling force range. Based on the differences and changes in these data, dynamic online diagnosis of the mill's condition is achieved.
It enables accurate and rapid diagnosis of the rolling mill status, and can promptly identify potential problems such as roll crossing and abnormal component gaps, ensuring the stability of the rolling process and product quality.
Smart Images
Figure CN121933293A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hot rolling technology, and in particular to a method, system, equipment and medium for diagnosing the condition of a flat roll mill. Background Technology
[0002] Currently, as the core equipment of a hot rolling production line, the mechanical condition of the rolling mill, such as the gap between the arch windows and the parallelism of the rolls, directly determines the stability of the rolling process and the product quality. However, the operating status of the internal structure of the rolling mill is difficult to quantify because it cannot be directly observed, becoming a challenge in production control. In existing technologies, the assessment of the rolling mill's condition mainly relies on periodic offline measurements. For example, during annual maintenance, equipment such as total stations are used to perform static geometric dimension measurements on the hollowed-out arch windows, and then theoretical matching calculations are performed with the measurement data of components such as roll bearing seats to indirectly assess the fitting clearance.
[0003] However, the measurement cycle for periodic offline measurements is too long, usually measured in years, making it impossible to capture changes in equipment condition caused by wear, oxide scale buildup, etc., during long-term operation. Moreover, static measurement data differs fundamentally from the dynamic operating conditions of the rolling mill under actual load and high-speed operation, resulting in assessment results that cannot accurately reflect the equipment status in production. Summary of the Invention
[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.
[0005] In a first aspect, embodiments of this application provide a method for diagnosing the condition of a flat-roll mill, the method comprising: The rolling mill is controlled to operate forward at a first preset speed. When the pressure of the rolling mill reaches the first preset rolling force range and is maintained for a first preset time, forward rolling force deviation data and the first elongation of the hydraulic cylinder in the rolling mill are obtained. The rolling mill is controlled to reverse at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the reverse rolling force deviation data and the second elongation of the hydraulic cylinder in the rolling mill are obtained. The change in rolling force deviation is determined based on the difference between the forward rolling force deviation data and the reverse rolling force deviation data. The diagnostic result of the rolling mill is determined based on the change in rolling force deviation, the first elongation, and the second elongation.
[0006] In one embodiment of the present invention, obtaining the positive rolling force deviation data includes: The rolling mill is controlled to operate forward at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the first rolling force data on the operating side of the rolling mill and the second rolling force data on the transmission side of the rolling mill are acquired. The difference between the first rolling force data and the second rolling force data is used as the positive rolling force deviation data.
[0007] In one embodiment of the present invention, obtaining the reverse rolling force deviation data includes: The rolling mill is controlled to reverse at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the third rolling force data of the rolling mill operation side and the fourth rolling force data of the rolling mill drive side are acquired. The difference between the third rolling force data and the fourth rolling force data is used as the positive rolling force deviation data.
[0008] In one embodiment of the present invention, determining the diagnostic result of the rolling mill based on the change in rolling force deviation, the first elongation, and the second elongation includes: Determine whether the change in rolling force deviation is less than a preset change threshold to obtain a first determination result; Determine whether the first elongation and the second elongation are consistent to obtain a second determination result; If the first judgment result is that the change in rolling force deviation is greater than a preset change threshold, and the second judgment result is that the first elongation and the second elongation are the same, the diagnosis result of the rolling mill is roll crossing; If the first judgment result is that the change in rolling force deviation is greater than a preset change threshold, and the second judgment result is that the first elongation and the second elongation are inconsistent, the diagnosis result of the rolling mill is that the rolls cross and the roll gap is too large.
[0009] In one embodiment of the present invention, the roll crossing includes an abnormality on the operating side of the rolling mill. After determining whether the first elongation and the second elongation are consistent and obtaining a second determination result, the process includes: If the change in rolling force deviation is greater than a preset change threshold, the first rolling force data is compared with the third rolling force data. If the first rolling force data is greater than the third rolling force data, the diagnostic result of the rolling mill is that the operation side of the rolling mill is abnormal.
[0010] In one embodiment of the present invention, the roll crossing includes an abnormality on the drive side of the rolling mill. After determining whether the first elongation and the second elongation are consistent and obtaining a second determination result, the method further includes: If the change in rolling force deviation is greater than a preset change threshold, the second rolling force data is compared with the fourth rolling force data. If the second rolling force data is greater than the fourth rolling force data, the diagnostic result of the rolling mill is that the transmission side of the rolling mill is abnormal.
[0011] In one embodiment of the present invention, after determining whether the first elongation and the second elongation are consistent and obtaining the second determination result, the method further includes: If the first judgment result is that the change in rolling force deviation is less than or equal to a preset change threshold, and the second judgment result is that the first elongation and the second elongation are consistent, the diagnosis result of the rolling mill is that the rolling mill is operating normally. If the first judgment result is that the change in rolling force deviation is less than or equal to a preset change threshold, and the second judgment result is that the first elongation and the second elongation are inconsistent, the diagnosis result of the rolling mill is that the roll gap is too large.
[0012] Secondly, this application proposes a mill condition diagnosis system for a flat roll mill, the system comprising: a forward rotation data acquisition module, a reverse rotation data acquisition module, and a diagnosis module; The forward rotation data acquisition module is configured to: control the mill to operate forward at a first preset speed, and acquire forward rolling force deviation data and the first elongation of the hydraulic cylinder in the mill when the pressure of the mill reaches a preset rolling force range and is maintained for a first preset time. The reverse data acquisition module is configured to: control the rolling mill to reverse at a first preset speed, and when the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, acquire reverse rolling force deviation data and the second elongation of the hydraulic cylinder in the rolling mill. The diagnostic module is configured to: determine the rolling force deviation change based on the difference between the forward rolling force deviation data and the reverse rolling force deviation data; and determine the diagnostic result of the rolling mill based on the rolling force deviation change, the first elongation, and the second elongation.
[0013] Thirdly, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program stored in the memory to implement the steps of a mill condition diagnosis method for a flat roll mill as described in any of the first aspects above.
[0014] Fourthly, this application also proposes a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, it implements the steps of a mill condition diagnosis method for a flat roll mill according to any one of the first aspects.
[0015] In summary, the mill condition diagnosis method for a flat roll mill according to the embodiments of this application controls the mill to operate in both forward and reverse directions sequentially, and to operate stably within the same preset rolling force range. This allows for the simultaneous acquisition of rolling force deviation data and hydraulic cylinder elongation data under both operating conditions. By judging these data, dynamic online diagnosis of the mill condition is achieved. This not only overcomes the shortcomings of traditional static measurement methods, such as long cycles, data lag, and inability to reflect actual operating conditions, but also, based on a comprehensive analysis of dynamic parameters such as the change in rolling force deviation under forward and reverse rotation tests, accurately and quickly identifies potential problems such as roll crossing and abnormal component gaps. This provides a reliable basis for timely equipment maintenance and adjustment, effectively ensuring the stability of the rolling process and product quality.
[0016] The mill condition diagnosis method for flat roll mills proposed in this application, along with other advantages, objectives, and features of this application, will be partly apparent from the following description and partly understood by those skilled in the art through study and practice of this application. Attached Figure Description
[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit this specification. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a flowchart illustrating a mill condition diagnosis method for a flat roll mill provided in an embodiment of this application. Figure 2 A schematic diagram of a mill condition diagnosis system for a flat roll mill provided in this application embodiment; Figure 3 This is a schematic diagram of an electronic device for diagnosing the condition of a flat roll mill, provided in an embodiment of this application. Detailed Implementation
[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.
[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.
[0020] Please see Figure 1 This is a schematic flowchart of a mill condition diagnosis method for a flat roll mill provided in an embodiment of this application, which may specifically include: S110. Control the rolling mill to operate forward at a first preset speed. When the pressure of the rolling mill reaches the first preset rolling force range and is maintained for a first preset time, acquire forward rolling force deviation data and the first elongation of the hydraulic cylinder in the rolling mill. For example, the rolling mill is controlled to operate stably in the forward direction at a first preset speed, which is 30% of the maximum speed of the rolling mill. This speed is designed to ensure that the support rolls have sufficient rotational inertia and stability, while avoiding unnecessary vibration interference caused by excessive speed. After the rolling mill speed stabilizes, the system enters the rolling force closed-loop control mode, manipulating the hydraulic pressing system to press the rolling mill down until the total rolling force reaches and stabilizes within the first preset rolling force range. At this time, the forward rolling force deviation data and the first elongation of the hydraulic cylinder in the rolling mill are acquired. The first preset rolling force range is specifically 5000KN±30KN. Within this rolling force range, the system needs to maintain this state for a first preset time. This first preset time is not a fixed value, but is based on the time taken for the support rolls to rotate two full revolutions continuously, thereby ensuring that the rolling mill's force state can completely act on all contact surfaces between the rolls and the bearing housing. Throughout the process, a key control logic is to maintain absolute consistency in the reduction on the operating side and the drive side of the mill, that is, without any form of leveling intervention. This ensures that the difference between the displacement (i.e., the first elongation) of the HGC (hydraulic gap control) cylinders on both sides and the rolling force can truly reflect the inherent state of the mechanical gap. At the same time, the entire process does not change the existing calibration parameters and zero-point reference of the mill, thus ensuring that the mill can immediately resume normal production without recalibration after the test.
[0021] The static geometric dimension measurement, which traditionally required long-term shutdown and equipment dismantling, has been transformed into a dynamic performance test that can be performed online during fragmented production time such as roll changing and waiting for temperature. This represents a fundamental shift in data acquisition methods from static to dynamic. By carefully controlling test conditions, such as fixed speed, constant rolling force, no leveling, and no changes to calibration, the obtained positive rolling force deviation data and first elongation data are highly comparable and accurate, and can keenly capture the dynamic force system changes caused by mechanical clearance and structural deformation.
[0022] S120. Control the rolling mill to reverse at a first preset speed. When the pressure of the rolling mill reaches the preset rolling force range and is maintained for a first preset time, acquire the reverse rolling force deviation data and the second elongation of the hydraulic cylinder in the rolling mill. For example, the rolling mill is controlled to operate in a stable reverse direction at a first preset speed, where the first preset speed is set to 30% of the rolling mill's maximum speed, and its rotation direction is opposite to the forward rotation. This allows for the examination of the rolling mill's state under symmetrical dynamic conditions. After the rolling mill's reverse speed stabilizes, the system re-enters the same rolling force closed-loop control mode as in the forward test, manipulating the hydraulic pressing system to press the rolling mill down until the total rolling force reaches and stabilizes within the first preset rolling force range (5000KN±30KN). Under this constant rolling force condition, the system maintains this state for a first preset time, i.e., the time required for the support roll to rotate two full revolutions, ensuring that the rolling mill's force state fully acts on all contact surfaces of the mechanical structure. Throughout this reverse test, the pressing amount on the rolling mill's operating side and drive side remains completely consistent without any leveling intervention. At the same time, the original calibration parameters and zero-point reference of the rolling mill are strictly maintained unchanged, thereby ensuring that the test conditions are completely consistent with the forward test. This allows the acquired reverse rolling force deviation data and second elongation data to form an effective symmetrical comparison with the forward test data.
[0023] By performing a reverse test, which is symmetrical to but in the opposite direction to the forward test, the dynamic response characteristics of the rolling mill's mechanical system under different force directions can be effectively stimulated. When the rolling mill has potential problems such as roll crossing or uneven gaps between the bearing housing and the arch liner, the distribution of rolling force on both sides and the elongation of the hydraulic cylinder will exhibit characteristic asymmetric changes under both forward and reverse rotation conditions. The second elongation data and reverse rolling force deviation data obtained during the reverse test, together with the corresponding data obtained from the forward test, constitute a complete dynamic dataset necessary for diagnostic analysis, providing an indispensable comparative basis for accurately identifying the gap position and determining the crossing direction.
[0024] S130. Based on the difference between the forward rolling force deviation data and the reverse rolling force deviation data, determine the change in rolling force deviation; For example, the result of subtracting the reverse rolling force deviation data from the forward rolling force deviation data is taken as the rolling force deviation change. This change directly characterizes the dynamic difference in the force balance state between the operating side and the transmission side of the mill when it is subjected to the same rolling force but the support rolls rotate in opposite directions. The essence of this difference stems from the asymmetry of the mechanical structure. When the mill is in normal condition and the gaps between the components are uniform, the rolling force deviation under forward and reverse rotation tests should tend to be consistent, with minimal change. Conversely, when there are problems such as roll crossing or wear of the liner on one side, the change in rotation direction will significantly change the force flow path, leading to a drastic change in the distribution of rolling force on both sides, thus significantly increasing the rolling force deviation change. A direct and reliable quantitative indicator (roll force deviation change) and a causal relationship between specific mill mechanical conditions (such as roll crossing or uneven gaps) are established, allowing operators to quickly and clearly identify the fault type and its location without relying on experience-based guessing or complex offline measurements.
[0025] S140. Based on the change in rolling force deviation, the first elongation, and the second elongation, determine the diagnostic result of the rolling mill.
[0026] For example, based on the change in rolling force deviation, the first elongation, and the second elongation, the diagnostic results of the rolling mill are determined. By integrating and analyzing the dynamic parameters presented under forward and reverse rotation tests, a single force or displacement signal is transformed into a comprehensive interpretation of the mechanical state of the equipment. The collaborative analysis enables the diagnostic results not only to qualitatively determine the existence of abnormal states, but also to further locate the fault location and assess its severity.
[0027] In summary, the mill condition diagnosis method for flat roll mills proposed in this application controls the mill to operate in both forward and reverse directions sequentially, and to run stably within the same preset rolling force range. This allows for the simultaneous acquisition of rolling force deviation data and hydraulic cylinder elongation data under both operating conditions. By analyzing this data, dynamic online diagnosis of the mill condition is achieved. This method not only overcomes the shortcomings of traditional static measurements, such as long cycles, data lag, and inability to reflect actual operating conditions, but also accurately and quickly identifies potential problems such as roll crossing and abnormal component gaps based on a comprehensive analysis of dynamic parameters such as the change in rolling force deviation under forward and reverse rotation tests. This provides a reliable basis for timely equipment maintenance and adjustment, effectively ensuring the stability of the rolling process and product quality.
[0028] In some examples, obtaining the forward rolling force deviation data includes: The rolling mill is controlled to operate forward at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the first rolling force data on the operating side of the rolling mill and the second rolling force data on the transmission side of the rolling mill are acquired. The difference between the first rolling force data and the second rolling force data is used as the positive rolling force deviation data.
[0029] For example, the rolling mill is controlled to operate stably in the forward direction at a first preset speed, specifically 30% of the maximum speed of the rolling mill. After the speed stabilizes, the system switches to the rolling force closed-loop control mode, and manipulates the hydraulic pressing system to press the rolling mill down until the total rolling force reaches and stabilizes within a first preset rolling force range, specifically 5000KN±30KN, and maintains this state for a first preset time, which is the time required for the support roll to rotate two full revolutions continuously. During this stable maintenance phase, force sensors respectively installed on the operating side and the transmission side of the rolling mill are used to synchronously collect the first rolling force data on the operating side and the second rolling force data on the transmission side of the rolling mill. Finally, the result of subtracting the second rolling force data from the first rolling force data is used as the forward rolling force deviation data.
[0030] When a rolling mill operates stably under dynamic conditions of constant speed and constant total rolling force, if its mechanical structure is ideally aligned and the gap is uniform, the rolling forces acting on the operating side and the transmission side should be essentially equal, meaning the positive rolling force deviation data should approach zero. However, when the rolling mill has potential mechanical problems such as wear of the arch liner, uneven bearing housing clearance, or roll crossing, even under the same total load, the forces on both sides will become unbalanced due to changes in the force flow path, resulting in a significant difference between the first and second rolling force data, thus causing the positive rolling force deviation data to deviate from zero. This method achieves high-frequency, real-time quantitative monitoring of the lateral stress state of the rolling mill, overcoming the inherent defect of traditional static measurements that cannot capture the stress characteristics of equipment under actual load and motion conditions.
[0031] In some examples, obtaining the reverse rolling force deviation data includes: The rolling mill is controlled to reverse at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the third rolling force data of the rolling mill operation side and the fourth rolling force data of the rolling mill drive side are acquired. The difference between the third rolling force data and the fourth rolling force data is used as the positive rolling force deviation data.
[0032] For example, the rolling mill is controlled to operate in a stable reverse direction at a first preset speed, specifically 30% of the rolling mill's maximum speed, with the rotation direction opposite to that during the forward test. After the rolling mill's reverse speed stabilizes, the system re-enters the same rolling force closed-loop control mode as the forward test, manipulating the hydraulic pressing system to press the rolling mill down until the total rolling force reaches and stabilizes within the first preset rolling force range, specifically 5000KN±30KN. Under this constant rolling force condition, the system maintains this state for a first preset time, consistent with the forward test, i.e., the time required for the support roll to rotate two full revolutions continuously. During this stable operation phase, force sensors respectively installed on the rolling mill's operating side and drive side synchronously collect the third rolling force data on the rolling mill's operating side and the fourth rolling force data on the rolling mill's drive side. Finally, the difference between the third rolling force data and the fourth rolling force data is used as the reverse rolling force deviation data.
[0033] By establishing a reverse test condition that is completely symmetrical to the forward test, a crucial comparative dataset is provided for mill condition diagnosis. When the mill operates stably under dynamic conditions of reverse rotation and the same rolling force, the force distribution on its operating and transmission sides will exhibit characteristic changes due to the change in rotation direction: if the mechanical structure is intact and the gap is uniform, the third and fourth rolling force data obtained from the reverse test should tend to be balanced, and the difference, i.e., the reverse rolling force deviation data, should be close to zero. Conversely, when there are mechanical defects such as roll crossing or unilateral liner wear, the reversal of the rotation direction will change the force transmission path, leading to a significant change in the force distribution on the operating and transmission sides, thus causing the reverse rolling force deviation data to exhibit characteristic deviations different from those in the forward test. This allows the system to accurately identify dynamic mechanical defects, such as roll crossing direction and excessive unilateral gap, which are difficult to capture by traditional static measurements, by comparing and analyzing the differences in force distribution patterns on both sides of the mill under forward and reverse operating conditions, thereby significantly improving the accuracy and reliability of mill condition diagnosis.
[0034] In some examples, determining the diagnostic result of the rolling mill based on the change in rolling force deviation, the first elongation, and the second elongation includes: Determine whether the change in rolling force deviation is less than a preset change threshold to obtain a first determination result; Determine whether the first elongation and the second elongation are consistent to obtain a second determination result; If the first judgment result is that the change in rolling force deviation is greater than a preset change threshold, and the second judgment result is that the first elongation and the second elongation are the same, the diagnosis result of the rolling mill is roll crossing; If the first judgment result is that the change in rolling force deviation is greater than a preset change threshold, and the second judgment result is that the first elongation and the second elongation are inconsistent, the diagnosis result of the rolling mill is that the rolls cross and the roll gap is too large.
[0035] For example, the change in rolling force deviation is compared with a preset change threshold to obtain a first judgment result. The preset change threshold is set to 300KN, which aims to quantify the dynamic difference in the force symmetry between the two sides of the rolling mill under forward and reverse rotation tests. Then, the consistency of the first elongation obtained in the forward test and the second elongation obtained in the reverse test is judged. This judgment does not require the values to be completely equal, but rather to judge whether the change trend and amplitude of the two are within a preset allowable deviation range during the stable operation phase of the forward and reverse rotation tests, to obtain a second judgment result, which is used to judge whether the displacement response of the hydraulic cylinder system is coordinated and consistent under the two rotation conditions.
[0036] When the first judgment result indicates that the change in rolling force deviation is greater than the preset 300KN threshold, and the second judgment result indicates that the first elongation and the second elongation are consistent within the preset allowable deviation range, the diagnosis result of the rolling mill is determined to be a roll crossing defect. Since the change in rolling force deviation reveals the non-parallel state of the roll axis, and the consistency of the elongation of the hydraulic cylinders on both sides excludes the possibility of excessive mechanical clearance on one side, the cause of the fault is locked to abnormal spatial orientation of the roll. Conversely, when the first judgment result also indicates that the change in rolling force deviation is greater than the 300KN threshold, but the second judgment result indicates that the first elongation and the second elongation are inconsistent, that is, the elongation on at least one side exceeds the preset allowable deviation range, the diagnosis result is determined to be a more complex combined fault of roll crossing and excessive roll clearance. In this case, not only is roll crossing present, but there is also a significant physical clearance between the bearing housing and the arch liner on at least one side. This causes the hydraulic cylinder on that side to compensate for this clearance and produce abnormal elongation changes during forward and reverse rotation tests. By systematically combining and analyzing the multi-dimensional physical quantities (rolling force deviation change and hydraulic cylinder elongation) obtained from dynamic testing with preset quantification thresholds and consistency standards, abstract test data is successfully transformed into specific and operable fault mode identification.
[0037] In some examples, the roll crossing includes an operational-side anomaly of the mill. After determining whether the first elongation and the second elongation are consistent and obtaining a second determination result, the process includes: If the change in rolling force deviation is greater than a preset change threshold, the first rolling force data is compared with the third rolling force data. If the first rolling force data is greater than the third rolling force data, the diagnostic result of the rolling mill is that the operation side of the rolling mill is abnormal.
[0038] For example, the first rolling force data collected in the forward test, i.e., the operating side rolling force, and the third rolling force data collected in the reverse test, also representing the operating side rolling force, are quantitatively compared. The preset change threshold is 300 kN, which physically establishes a critical criterion for distinguishing between normal fluctuations and abnormal crossovers. When the change in rolling force deviation is determined to be greater than this 300 kN threshold, it indicates that there is a significant roll crossover phenomenon in the rolling mill, and it is necessary to further identify the biased side of the crossover. By comparing the force on the same side (taking the operating side as an example here) under two different rotational directions, i.e., comparing the numerical values of the first rolling force data and the third rolling force data, the directional characteristics of the crossover point can be revealed.
[0039] When the first rolling force data is determined to be greater than the third rolling force data, it indicates that the operating side experiences a greater rolling force during forward rotation, while the force on that side decreases relatively during reverse rotation. This asymmetric force phenomenon reveals the spatial orientation bias of the roll crossing point: according to the principles of rolling mill mechanics, in the presence of roll crossing, a change in the rotation direction causes a symmetrical change in the roll gap shape, resulting in a shift in the side with greater force. If the force on the operating side during forward testing is significantly greater than that during reverse testing, the diagnostic conclusion is that the crossing point is biased towards the drive side, and the operating side of the rolling mill is diagnosed as having an anomaly. The anomaly on the operating side here is a comprehensive diagnostic conclusion. Its specific technical connotation refers to the fact that due to wear, installation posture deviation, or structural deformation of related mechanical components (such as bearing seats, liners, etc.) on the operating side, this side becomes the force-sensitive side of the roll crossing defect during dynamic operation, and is a specific location requiring targeted maintenance and adjustment. Based on the determination of roll crossing, the abstract crossing problem is further transformed into specific, operable directional information.
[0040] In some examples, the roll crossing includes an anomaly on the drive side of the mill. After determining whether the first elongation and the second elongation are consistent and obtaining a second determination result, the process further includes: If the change in rolling force deviation is greater than a preset change threshold, the second rolling force data is compared with the fourth rolling force data. If the second rolling force data is greater than the fourth rolling force data, the diagnostic result of the rolling mill is that the transmission side of the rolling mill is abnormal.
[0041] For example, after the change in rolling force deviation is determined to be greater than a preset change threshold (300KN), and the second judgment result confirming the consistency between the first elongation and the second elongation has been completed, a comparative analysis of the directional rolling force on the drive side is performed to further accurately locate the spatial orientation of the roll crossing. Specifically, the second rolling force data collected in the forward test (i.e., the rolling force on the drive side during forward rotation) is numerically compared with the fourth rolling force data collected in the reverse test (i.e., the rolling force on the drive side during reverse rotation). The core physical principle of this comparison is that when rolls cross, the change in the rotation direction of the support rolls systematically changes the distribution ratio of force flow between the operating side and the drive side. If the second rolling force data is determined to be greater than the fourth rolling force data, it indicates that the drive side bears a larger load under forward rotation conditions, while the load on this side is relatively reduced during reverse rotation. This repeatable, rotation-direction-related asymmetric force pattern clearly indicates that the geometric center of the roll crossing is spatially biased towards the operating side, causing the drive side to become the primary force-bearing side during forward operation. Based on this, the system generates a diagnostic conclusion for a drive-side anomaly in the mill. This drive-side anomaly is a diagnostic output with clear engineering implications. Technically, it refers to the fact that, under the current roll crossing failure mode, related mechanical components on the drive side (such as bearing housings and liners) become sensitive and concentrated forces in the dynamic force system due to their spatial orientation or fit clearances, and are therefore specific locations requiring priority inspection, adjustment, or maintenance.
[0042] Based on the confirmed presence of roll crossover, the location of the fault was precisely pinpointed. By comparing and analyzing the differences in rolling forces experienced by the same side (drive side) under forward and reverse rotation conditions, the abstract "crossover" problem was transformed into a concrete and actionable maintenance guideline of "drive side anomaly." This allows equipment maintenance personnel to directly and precisely inspect and adjust key components such as bearing housings and liners on the drive side, avoiding the need for blindly disassembling and inspecting the entire mill line, and greatly improving the efficiency and accuracy of maintenance work.
[0043] In some examples, after determining whether the first elongation and the second elongation are consistent and obtaining the second determination result, the method further includes: If the first judgment result is that the change in rolling force deviation is less than or equal to a preset change threshold, and the second judgment result is that the first elongation and the second elongation are consistent, the diagnosis result of the rolling mill is that the rolling mill is operating normally. If the first judgment result is that the change in rolling force deviation is less than or equal to a preset change threshold, and the second judgment result is that the first elongation and the second elongation are inconsistent, the diagnosis result of the rolling mill is that the roll gap is too large.
[0044] For example, after determining the consistency between the change in rolling force deviation and the first and second elongations, if the first determination result indicates that the change in rolling force deviation is less than or equal to a preset threshold of 300 kN, and the second determination result indicates that the first elongation obtained in the forward test and the second elongation obtained in the reverse test are consistent within a preset allowable deviation range, then the system generates a diagnostic conclusion that the mill is operating normally. The fact that the change in rolling force deviation does not exceed the threshold indicates that the force distribution on both sides of the mill is basically symmetrical under both forward and reverse rotation conditions, and there is no significant force imbalance caused by the crossover of the rolls. Simultaneously, the consistency between the first and second elongations further proves that the displacement response of the hydraulic cylinders on both sides of the mill remains coordinated during directional changes, and that the mechanical transmission system does not suffer from abnormal displacement compensation due to excessive clearance on one side. Therefore, the simultaneous fulfillment of these two conditions verifies from both force and displacement dimensions that the core components of the rolling mill (such as rolls, bearing housings, and arch liner plates) are in good alignment and fit, and there are no roll crossing or significant gap faults that require immediate intervention. Thus, it is determined to be operating normally.
[0045] If the first judgment result indicates that the change in rolling force deviation is also less than or equal to the preset threshold of 300KN, but the second judgment result indicates that the first elongation and the second elongation are inconsistent, that is, the elongation on at least one side exceeds the preset allowable deviation range, then the system generates a diagnostic conclusion that the roll gap is too large. The phenomenon that the change in rolling force deviation does not exceed the threshold first rules out the possibility of severe roll crossing, because crossing would inevitably lead to a significant disruption of the force symmetry under forward and reverse rotation conditions; however, the inconsistency between the first and second elongations clearly reveals that during forward and reverse rotation tests, the hydraulic cylinder on at least one side of the mill generated an inconsistent displacement response to compensate for the physical clearance in the mechanical structure. This inconsistent displacement response directly characterizes the existence of a physical clearance exceeding the allowable range between the bearing housing and the arch liner, or between mating components such as the stepped pad. When the rotation direction changes, this clearance causes a slight change in the force transmission path, which in turn causes the hydraulic cylinder to adjust the elongation inconsistently to maintain the same total rolling force. Therefore, this diagnostic conclusion accurately locates the fault mode as excessive gap, rather than abnormal roll posture.
[0046] like Figure 2 As shown, this application proposes a mill condition diagnosis system for a flat roll mill, the system comprising: a forward rotation data acquisition module 21, a reverse rotation data acquisition module 22, and a diagnosis module 23; The forward rotation data acquisition module 21 is configured to: control the rolling mill to operate forward at a first preset speed, and acquire forward rolling force deviation data and the first elongation of the hydraulic cylinder in the rolling mill when the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time. The reverse data acquisition module 22 is configured to: control the rolling mill to reverse at a first preset speed, and when the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, acquire reverse rolling force deviation data and the second elongation of the hydraulic cylinder in the rolling mill. The diagnostic module 23 is configured to: determine the rolling force deviation change based on the difference between the forward rolling force deviation data and the reverse rolling force deviation data; and determine the diagnostic result of the rolling mill based on the rolling force deviation change, the first elongation, and the second elongation.
[0047] The effects of applying the aforementioned method in the above system can be found in the description of the aforementioned method embodiments, and will not be repeated here.
[0048] like Figure 3 As shown, this application embodiment also provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, it implements the steps of any of the above-mentioned methods for diagnosing the mill status of a flat roll mill.
[0049] Since the electronic device described in this embodiment is the device used to implement the mill condition diagnosis device of a flat roll mill in the embodiments of this application, those skilled in the art can understand the specific implementation method and various variations of the electronic device in this embodiment based on the method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any device used by those skilled in the art to implement the method in the embodiments of this application is within the scope of protection of this application.
[0050] In practical implementation, when the computer program 311 is executed by the processor, it can achieve the following: Figure 1 Any of the corresponding implementation methods in the embodiments.
[0051] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0052] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.
[0053] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0054] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0055] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0056] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to execute the LDPC decoding method of a solid-state drive controller.
[0057] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).
[0058] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0059] In the several embodiments provided in this 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 merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.
[0060] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0061] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0062] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0063] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
[0064] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.
[0065] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.
Claims
1. A method for diagnosing the condition of a flat-roll rolling mill, characterized in that, The method includes: The rolling mill is controlled to operate forward at a first preset speed. When the pressure of the rolling mill reaches the first preset rolling force range and is maintained for a first preset time, forward rolling force deviation data and the first elongation of the hydraulic cylinder in the rolling mill are obtained. The rolling mill is controlled to reverse at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the reverse rolling force deviation data and the second elongation of the hydraulic cylinder in the rolling mill are obtained. The change in rolling force deviation is determined based on the difference between the forward rolling force deviation data and the reverse rolling force deviation data. The diagnostic result of the rolling mill is determined based on the change in rolling force deviation, the first elongation, and the second elongation.
2. The mill condition diagnosis method for a flat roll mill according to claim 1, characterized in that, The acquisition of positive rolling force deviation data includes: The rolling mill is controlled to operate forward at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the first rolling force data on the operating side of the rolling mill and the second rolling force data on the transmission side of the rolling mill are acquired. The difference between the first rolling force data and the second rolling force data is used as the positive rolling force deviation data.
3. The mill condition diagnosis method for a flat roll mill according to claim 2, characterized in that, The acquisition of reverse rolling force deviation data includes: The rolling mill is controlled to reverse at a first preset speed. When the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, the third rolling force data of the rolling mill operation side and the fourth rolling force data of the rolling mill drive side are acquired. The difference between the third rolling force data and the fourth rolling force data is used as the positive rolling force deviation data.
4. The mill condition diagnosis method for a flat roll mill according to claim 3, characterized in that, The determination of the diagnostic result of the rolling mill based on the change in rolling force deviation, the first elongation, and the second elongation includes: Determine whether the change in rolling force deviation is less than a preset change threshold to obtain a first determination result; Determine whether the first elongation and the second elongation are consistent to obtain a second determination result; If the first judgment result is that the change in rolling force deviation is greater than a preset change threshold, and the second judgment result is that the first elongation and the second elongation are the same, the diagnosis result of the rolling mill is roll crossing; If the first judgment result is that the change in rolling force deviation is greater than a preset change threshold, and the second judgment result is that the first elongation and the second elongation are inconsistent, the diagnosis result of the rolling mill is that the rolls cross and the roll gap is too large.
5. The mill condition diagnosis method for a flat roll mill according to claim 4, characterized in that, The roll crossing includes an abnormality on the operating side of the mill. After determining whether the first elongation and the second elongation are consistent and obtaining a second determination result, the process includes: If the change in rolling force deviation is greater than a preset change threshold, the first rolling force data is compared with the third rolling force data. If the first rolling force data is greater than the third rolling force data, the diagnostic result of the rolling mill is that the operation side of the rolling mill is abnormal.
6. The mill condition diagnosis method for a flat roll mill according to claim 4, characterized in that, The roll crossing includes an abnormality on the drive side of the rolling mill. After determining whether the first elongation and the second elongation are consistent and obtaining the second determination result, the method further includes: If the change in rolling force deviation is greater than a preset change threshold, the second rolling force data is compared with the fourth rolling force data. If the second rolling force data is greater than the fourth rolling force data, the diagnostic result of the rolling mill is that the transmission side of the rolling mill is abnormal.
7. The mill condition diagnosis method for a flat roll mill according to claim 4, characterized in that, After determining whether the first elongation and the second elongation are consistent and obtaining the second determination result, the method further includes: If the first judgment result is that the change in rolling force deviation is less than or equal to a preset change threshold, and the second judgment result is that the first elongation and the second elongation are consistent, the diagnostic result of the rolling mill is that the rolling mill is operating normally. If the first judgment result is that the change in rolling force deviation is less than or equal to a preset change threshold, and the second judgment result is that the first elongation and the second elongation are inconsistent, the diagnosis result of the rolling mill is that the roll gap is too large.
8. A mill condition diagnosis system for a flat roll mill, characterized in that, The system includes: a forward rotation data acquisition module, a reverse rotation data acquisition module, and a diagnostic module; The forward rotation data acquisition module is configured to: control the rolling mill to operate forward at a first preset speed, and acquire forward rolling force deviation data and the first elongation of the hydraulic cylinder in the rolling mill when the pressure of the rolling mill reaches the preset rolling force range and is maintained for a first preset time; The reverse data acquisition module is configured to: control the rolling mill to reverse at a first preset speed, and when the pressure of the rolling mill reaches a preset rolling force range and is maintained for a first preset time, acquire reverse rolling force deviation data and the second elongation of the hydraulic cylinder in the rolling mill. The diagnostic module is configured to: determine the rolling force deviation change based on the difference between the forward rolling force deviation data and the reverse rolling force deviation data; and determine the diagnostic result of the rolling mill based on the rolling force deviation change, the first elongation, and the second elongation.
9. An electronic device, comprising: The memory and processor are characterized in that the processor is used to execute a computer program stored in the memory to implement the steps of a mill condition diagnosis method for a flat roll mill as described in any one of claims 1-7.
10. 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 steps of a mill condition diagnosis method for a flat roll mill as described in any one of claims 1-7.