Method, device and apparatus for damping a rolling mill

Abstract

This invention discloses a vibration suppression method, apparatus, and equipment for a rolling mill. The method includes: acquiring a first fluctuating rolling force of the rolling mill, wherein the first fluctuating rolling force is the rolling force generated due to vibration within a first frequency range of the rolling mill; determining the roll gap position deviation of the rolling mill based on the first fluctuating rolling force, wherein the roll gap position deviation is the position deviation of the current roll gap position of the rolling mill relative to a set roll gap position; and controlling the roll gap control system of the rolling mill based on the roll gap position deviation, so that the roll gap position deviation of the rolling mill is less than a preset position deviation threshold. This invention solves the technical problem of large vibration amplitude in rolling mills.

Description

Technical Field

[0001] This invention belongs to the field of rolling technology, and particularly relates to a vibration suppression method, device and equipment for a rolling mill. Background Technology

[0002] During the rolling process of strip steel, the vibration of the rolling mill leads to low strip steel quality, which in turn reduces the product qualification rate and increases enterprise costs. Current technologies mainly focus on improving the structure of the rolling mill to reduce the vibration amplitude, but the results are not ideal. Therefore, the large vibration amplitude of the rolling mill is a technical problem that urgently needs to be solved. Summary of the Invention

[0003] This invention provides a vibration suppression method, device, and equipment for rolling mills, which solves the technical problem of large vibration amplitude in rolling mills.

[0004] In a first aspect, embodiments of the present invention provide a vibration suppression method for a rolling mill, comprising: acquiring a first fluctuating rolling force of the rolling mill, the first fluctuating rolling force being a rolling force generated due to vibration within a first frequency range of the rolling mill; determining a roll gap position deviation of the rolling mill based on the first fluctuating rolling force, the roll gap position deviation being a position deviation of the current roll gap position of the rolling mill relative to a set roll gap position; and controlling a roll gap control system of the rolling mill based on the roll gap position deviation of the rolling mill, so that the roll gap position deviation of the rolling mill is less than a preset position deviation threshold.

[0005] In conjunction with the first aspect of the present invention, in some embodiments, obtaining the first fluctuating rolling force of the rolling mill includes: obtaining the total rolling force of the rolling mill, the total rolling force being the sum of the set rolling force of the rolling mill and the second fluctuating rolling force of the rolling mill, the second fluctuating rolling force being the rolling force generated due to vibration of the rolling mill in a second frequency range, the second frequency range including the first frequency range; and processing the total rolling force based on a preset target bandpass filter function to obtain the first fluctuating rolling force.

[0006] In conjunction with the first aspect of the present invention, in some embodiments, the target bandpass filter function is predetermined by the following steps: determining the first frequency range based on the preset rolling speed of the rolling mill; and selecting the target bandpass filter function from a plurality of preset bandpass filter functions based on the first frequency range.

[0007] In conjunction with the first aspect of the present invention, in some embodiments, determining the first frequency range based on the preset rolling speed of the rolling mill includes: taking the product of the preset rolling speed of the rolling mill and a preset coefficient as the target vibration frequency; taking the sum of the target vibration frequency and the preset frequency as the upper limit of the first frequency range; and taking the difference between the target vibration frequency and the preset frequency as the lower limit of the first frequency range.

[0008] In conjunction with the first aspect of the present invention, in some embodiments, the first frequency range is 6Hz to 10Hz, 7Hz to 11Hz, 8Hz to 12Hz, 9Hz to 13Hz, or 10Hz to 14Hz.

[0009] In conjunction with the first aspect of the present invention, in some embodiments, the target bandpass filter function is a Butterworth filter function.

[0010] In conjunction with the first aspect of the present invention, in some embodiments, determining the roll gap position deviation of the rolling mill based on the first fluctuating rolling force includes: determining the mill extension based on a preset correspondence and the first fluctuating rolling force, wherein the mill extension is the amount of deformation of the mill's arch and rolls under a certain rolling force, and the preset correspondence is the correspondence between the rolling force of the rolling mill and the mill extension; and determining the roll gap position deviation of the rolling mill based on the mill extension.

[0011] In conjunction with the first aspect of the present invention, in some embodiments, the roll gap control system includes a hydraulic cylinder; the roll gap control system for controlling the mill based on the roll gap position deviation of the mill includes: determining a position adjustment amount of the piston of the hydraulic cylinder based on the roll gap position deviation of the mill; and adjusting the piston position of the hydraulic cylinder based on the position adjustment amount.

[0012] Secondly, embodiments of the present invention provide a vibration suppression device for a rolling mill, comprising: a rolling force acquisition unit, configured to acquire a first fluctuating rolling force of the rolling mill, wherein the first fluctuating rolling force is a rolling force generated due to vibration within a first frequency range of the rolling mill; a deviation determination unit, configured to determine a roll gap position deviation of the rolling mill based on the first fluctuating rolling force, wherein the roll gap position deviation is a position deviation of the current roll gap position of the rolling mill relative to a set roll gap position; and a control unit, configured to control the roll gap control system of the rolling mill based on the roll gap position deviation of the rolling mill, so that the roll gap position deviation of the rolling mill is less than a preset position deviation threshold.

[0013] Thirdly, embodiments of the present invention provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in any of the first aspects.

[0014] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0015] This invention, in its embodiments, acquires a first fluctuating rolling force from the rolling mill, which is the rolling force generated due to vibrations within a first frequency range in the rolling mill. Based on this first fluctuating rolling force, it determines the roll gap position deviation, which is the deviation of the current roll gap position from a set roll gap position. Based on this roll gap position deviation, it controls the rolling mill's roll gap control system to ensure that the roll gap position deviation is less than a preset position deviation threshold. By controlling the roll gap control system, the roll gap position deviation is reduced, thus reducing the vibration of the rolling mill rolls and suppressing the rolling mill's vibration. Therefore, the vibration amplitude of the rolling mill is reduced. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the vibration suppression method for a rolling mill in an embodiment of the present invention;

[0018] Figure 2 The amplitude-frequency and phase-frequency characteristics of the first bandpass filter function in this embodiment of the invention;

[0019] Figure 3 The amplitude-frequency and phase-frequency characteristics of the second bandpass filter function in this embodiment of the invention;

[0020] Figure 4 The amplitude-frequency and phase-frequency characteristics of the third bandpass filter function in this embodiment of the invention;

[0021] Figure 5 The amplitude-frequency and phase-frequency characteristics of the fourth bandpass filter function in this embodiment of the invention;

[0022] Figure 6 The amplitude-frequency and phase-frequency characteristics of the fifth bandpass filter function in this embodiment of the invention;

[0023] Figure 7 This is a schematic diagram of roll gap position control in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram illustrating the vibration suppression effect in an embodiment of the present invention;

[0025] Figure 9 This is a functional block diagram of the vibration damping device of the rolling mill in an embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0029] This invention provides a vibration suppression method for rolling mills, with reference to... Figure 1 As shown, the method includes the following steps S101 to S103:

[0030] S101: Obtain the first fluctuating rolling force of the rolling mill, which is the rolling force generated due to the vibration of the rolling mill in a first frequency range.

[0031] In some embodiments, obtaining the first fluctuating rolling force of the rolling mill may include: obtaining the total rolling force of the rolling mill, which is the sum of the set rolling force of the rolling mill and the second fluctuating rolling force of the rolling mill, wherein the second fluctuating rolling force is the rolling force generated due to the vibration of the rolling mill in a second frequency range, the second frequency range including the first frequency range; and processing the total rolling force based on a preset target bandpass filter function to obtain the first fluctuating rolling force.

[0032] In some implementations, the target bandpass filter function may be predetermined by the following steps: determining a first frequency range based on a preset rolling speed of the mill; and selecting the target bandpass filter function from a plurality of preset bandpass filter functions based on the first frequency range.

[0033] It should be noted that each of the multiple bandpass filter functions corresponds to a frequency range. The first frequency range refers to the mill vibration frequencies that can be reduced by controlling the roll gap position. The second frequency range is larger than the first, and it contains mill vibration frequencies that cannot be reduced by controlling the roll gap position. Furthermore, based on historical production data, it can be seen that when producing the same grade of steel, the mill vibration frequency is basically linearly related to the rolling speed. Therefore, the first frequency range can be determined by preset the rolling speed, enabling accurate identification of mill vibration frequencies that can be reduced by controlling the roll gap position.

[0034] Specifically, the bandpass filter function can be found in the following formula (1):

[0035] y(n)=n0x(n)+n1x(n-1)+n2x(n-2)+n3x(n-3)+n4x(n-4)-[d1y(n-1)+d2y(n-2)+d3y(n-3)+d4y(n-4)](1);

[0036] Where x(n) is the total rolling force at time n, y(n) is the first fluctuation rolling force at time n, and n0~n4 and d1~d4 are parameters of the bandpass filter function.

[0037] In some implementations, the first frequency range can be 6Hz to 10Hz, 7Hz to 11Hz, 8Hz to 12Hz, 9Hz to 13Hz, or 10Hz to 14Hz.

[0038] It should be noted that, based on historical vibration data, the first frequency range varies between 6Hz and 14Hz depending on the rolling process, and the vibration frequency width is basically between 3Hz and 4Hz. Therefore, the 6Hz-14Hz range can be divided into 5 sub-ranges, each with a width of 4Hz, namely 6Hz-10Hz, 7Hz-11Hz, 8Hz-12Hz, 9Hz-13Hz, and 10Hz-14Hz. Each sub-range corresponds to a different rolling process, i.e., a different rolling speed. Although there are more than 5 rolling processes, the 5 sub-ranges can cover all rolling processes. Bandpass filter functions are designed for the 5 sub-ranges respectively, and Butterworth type filters can be used, with a filter order of 4. Specifically, the corresponding bandpass filter functions are designed for different frequency ranges, as shown in Table 1 and Formula (1):

[0039] Table 1:

[0040]

[0041] In addition, the amplitude-frequency and phase-frequency characteristics of the five bandpass filter functions in Table 1 can be referenced. Figures 2-6 As shown, where, Figure 2 The amplitude-frequency and phase-frequency characteristics of the first bandpass filter function in this embodiment of the invention can specifically be the bandpass filter function corresponding to the first frequency range of 6Hz to 10Hz. Figure 3 The amplitude-frequency and phase-frequency characteristics of the second bandpass filter function in this embodiment of the invention can specifically be the bandpass filter function corresponding to the first frequency range of 7Hz to 11Hz. Figure 4 The amplitude-frequency and phase-frequency characteristics of the third bandpass filter function in this embodiment of the invention can specifically be the bandpass filter function corresponding to the first frequency range of 8Hz to 12Hz; Figure 5 The amplitude-frequency and phase-frequency characteristics of the fourth bandpass filter function in this embodiment of the invention can specifically be the bandpass filter function corresponding to the first frequency range of 9Hz to 13Hz; Figure 6 The amplitude-frequency and phase-frequency characteristics of the fifth bandpass filter function in this embodiment of the invention can specifically be the bandpass filter function corresponding to the first frequency range of 10Hz to 14Hz.

[0042] It should be noted that by determining the target bandpass filter function through the first frequency range, the target bandpass filter function can accurately filter the rolling force signal, improve the data accuracy of the first fluctuation rolling force, make the subsequent control of the roll gap control system more accurate, improve the accuracy of roll gap position control, and ultimately reduce the vibration amplitude of the rolling mill.

[0043] In some implementations, determining the first frequency range based on the mill's preset rolling speed may include: using the product of the mill's preset rolling speed and a preset coefficient as the target vibration frequency; using the sum of the target vibration frequency and the preset frequency as the upper limit of the first frequency range; and using the difference between the target vibration frequency and the preset frequency as the lower limit of the first frequency range.

[0044] In some implementations, the target bandpass filter function is a Butterworth filter function.

[0045] It should be noted that selecting the Butterworth filter function as the target bandpass filter function can improve the filtering effect, improve the accuracy of the first fluctuation rolling force data, and make the subsequent control of the roll gap control system more accurate.

[0046] S102: Based on the first fluctuation rolling force, determine the roll gap position deviation of the mill. The roll gap position deviation is the position deviation of the current roll gap position of the mill relative to the set roll gap position.

[0047] Specifically, roll gap can refer to the roll gap of the work roll.

[0048] In some implementations, determining the roll gap position deviation of the mill based on the first fluctuating rolling force may include: determining the mill extension based on a preset correspondence and the first fluctuating rolling force, wherein the mill extension is the amount of deformation of the mill arch and rolls under a certain rolling force, and the preset correspondence is the correspondence between the rolling force of the mill and the mill extension; and determining the roll gap position deviation of the mill based on the mill extension.

[0049] Specifically, the pre-defined correspondence can be referred to as formula (2) below. In addition, the derivation process of formula (2) can be referred to as formulas (3) and (4) below:

[0050]

[0051] Where P is the first wave rolling force, S m For mill extension, B is the strip width, C, C1, C2, C3, C4 and C5 are model coefficients, different mills have different model coefficients, and M is the mill stiffness. The derivation process of formula (2) is explained below: Integrating formula (3) yields formula (4). Since the first wave rolling force is 0 when the mill extension is 0, C = 0. Considering that C1 > 0, C2 > 0, and S m >0, from formula (4), we can obtain formula (2).

[0052] In some implementations, determining the roll gap position deviation of the mill based on the mill extension can be achieved by using the mill extension as the roll gap position deviation.

[0053] S103: Based on the roll gap position deviation of the rolling mill, control the roll gap control system of the rolling mill so that the roll gap position deviation of the rolling mill is less than the preset position deviation threshold.

[0054] In some embodiments, the roll gap control system may include a hydraulic cylinder; the roll gap control system for controlling the mill based on the roll gap position deviation of the mill may include: determining the position adjustment amount of the piston of the hydraulic cylinder based on the roll gap position deviation of the mill; and adjusting the piston position of the hydraulic cylinder based on the position adjustment amount.

[0055] refer to Figure 7 As shown, Figure 7 This is a schematic diagram of the roll gap position control in an embodiment of the present invention.

[0056] It should be noted that the embodiments of the present invention are particularly applicable to roughing mills in endless continuous casting and rolling. With national development, the requirements for energy conservation and carbon reduction in steel production enterprises are becoming increasingly stringent, leading to a gradual increase in thin slab endless continuous casting and rolling production lines. Thin slab endless continuous casting and rolling technology is of great significance for reducing energy consumption and promoting green manufacturing and low-carbon development in the steel industry. However, in the production of thin-gauge steel, mill vibration problems frequently occur, leading to a decline in strip surface quality and increased equipment wear. Mill vibration not only occurs in finishing mills but also in roughing mills, especially in the last stand of the roughing mill. The mill vibration frequency of finishing mills is generally between 20Hz and 80Hz, while that of roughing mills is generally between 5Hz and 15Hz. The hydraulic reduction system response speed of a typical hot continuous rolling mill is around 20Hz. Therefore, the mill vibration problem in roughing mills can be solved by active vibration suppression. Thus, the embodiments of the present invention are particularly applicable to roughing mills. This invention extracts the dynamic vibration signal from the rolling force using a bandpass filter function, then converts the dynamic rolling force into a corresponding dynamic roll gap value. Finally, after passing through a proportional gain circuit and a limiting module, the signal is fed back to the roll gap position for closed-loop control, achieving active vibration suppression. This invention proposes a practical active vibration suppressor for roughing mills that requires no additional hardware. Vibration control of roughing mills can be achieved by writing a PLC primary program and adjusting the active vibration suppressor parameters. This method is simple, easy to implement, computationally inefficient, and has minimal latency.

[0057] It should be noted that the function of the bandpass filter is to extract the dynamic rolling force of the corresponding frequency band of the mill vibration from the rolling force signal. Different rolling processes result in variations in the mill's exit thickness and rolling speed, leading to differences in the mill's vibration frequency. Therefore, the impact of different rolling processes on the mill's vibration frequency must be considered when designing the bandpass filter. The subsequent design process uses the H2 mill (the last stand of the roughing mill) as an example; other roughing mills are similar. Based on historical experience, when producing the same grade of steel, the vibration frequency of the H2 mill is generally linearly related to the rolling speed. First, based on historical vibration data, the relationship between the rolling speed and the H2 mill's vibration frequency is fitted. It should be pointed out that, generally, the mill vibration frequency is not an isolated frequency value, but rather multiple frequency values ​​with a certain degree of concentration, resembling a mountain peak shape in the frequency spectrum. The approximate range of the mill vibration frequency can be determined from the rolling speed. After the rolling force passes through the bandpass filter, the dynamic component of the rolling force is obtained. The purpose of the mill extension calculation is to convert the dynamic component of the rolling force into the mill roll gap. Finally, regarding the gain and limiting settings, the purpose of the gain module is to adjust the magnitude of the adjustment, typically set between 0.5 and 4. The purpose of the limiting module is to prevent excessive adjustment, thereby ensuring the safety of the closed-loop feedback; the limiting setting is generally ±40μm.

[0058] refer to Figure 8 As shown, Figure 8 This diagram illustrates the vibration suppression effect in an embodiment of the invention. An experiment was conducted while producing 1.45mm SPA-H mill rolls. Without the vibration damper activated, the rolling force fluctuation of the H2 mill was approximately 90 kN. When the vibration damper was activated at 12 seconds, the rolling force fluctuation of the H2 mill decreased to approximately 10 kN, representing an 89% reduction. This demonstrates the significant active vibration suppression effect.

[0059] This invention, in its embodiments, acquires a first fluctuating rolling force from the rolling mill, which is the rolling force generated due to vibrations within a first frequency range in the rolling mill. Based on this first fluctuating rolling force, it determines the roll gap position deviation, which is the deviation of the current roll gap position from a set roll gap position. Based on this roll gap position deviation, it controls the rolling mill's roll gap control system to ensure that the roll gap position deviation is less than a preset position deviation threshold. By controlling the roll gap control system, the roll gap position deviation is reduced, thus reducing the vibration of the rolling mill rolls and suppressing the rolling mill's vibration. Therefore, the vibration amplitude of the rolling mill is reduced.

[0060] Based on the same inventive concept, and referring to Figure 9 As shown, an embodiment of the present invention provides a vibration suppression device 10 for a rolling mill, comprising: a rolling force acquisition unit 110, used to acquire a first fluctuating rolling force of the rolling mill, the first fluctuating rolling force being the rolling force generated due to vibration within a first frequency range of the rolling mill; a deviation determination unit 120, used to determine the roll gap position deviation of the rolling mill based on the first fluctuating rolling force, the roll gap position deviation being the position deviation of the current roll gap position of the rolling mill relative to a set roll gap position; and a control unit 130, used to control the roll gap control system of the rolling mill based on the roll gap position deviation of the rolling mill, so that the roll gap position deviation of the rolling mill is less than a preset position deviation threshold.

[0061] It is understood that the rolling force acquisition unit 110 includes: a total acquisition subunit, used to acquire the total rolling force of the rolling mill, the total rolling force being the sum of the set rolling force of the rolling mill and the second fluctuating rolling force of the rolling mill, the second fluctuating rolling force being the rolling force generated due to the vibration of the rolling mill in a second frequency range, the second frequency range including the first frequency range; and a processing subunit, used to process the total rolling force based on a preset target bandpass filter function to obtain the first fluctuating rolling force.

[0062] Understandably, the vibration suppression device 10 of the rolling mill also includes a function determination unit, used to pre-determine the target bandpass filter function, specifically including the following steps: determining a first frequency range based on the preset rolling speed of the rolling mill; selecting the target bandpass filter function from a plurality of preset bandpass filter functions based on the first frequency range. Specifically, determining the first frequency range based on the preset rolling speed of the rolling mill includes: using the product of the preset rolling speed and a preset coefficient as the target vibration frequency; using the sum of the target vibration frequency and the preset frequency as the upper limit of the first frequency range; and using the difference between the target vibration frequency and the preset frequency as the lower limit of the first frequency range.

[0063] Understandably, the first frequency range is 6Hz~10Hz, 7Hz~11Hz, 8Hz~12Hz, 9Hz~13Hz, or 10Hz~14Hz.

[0064] It is understandable that the target bandpass filter function is the Butterworth filter function.

[0065] It is understandable that the deviation determination unit 120 includes: determining the mill extension based on the preset correspondence and the first fluctuation rolling force, wherein the mill extension is the amount of deformation of the mill arch and rolls under a certain rolling force, and the preset correspondence is the correspondence between the rolling force of the mill and the mill extension; and determining the deviation of the roll gap position of the mill based on the mill extension.

[0066] Understandably, the roll gap control system includes a hydraulic cylinder; the control unit 130 is specifically used to: determine the position adjustment amount of the piston of the hydraulic cylinder based on the roll gap position deviation of the mill; and adjust the piston position of the hydraulic cylinder based on the position adjustment amount.

[0067] It should be understood that further implementation details of the vibration damping device 10 of the rolling mill in the embodiments of the present invention are described in the aforementioned vibration damping method of the rolling mill, and will not be repeated here for the sake of brevity.

[0068] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, such as... Figure 10 As shown, the device includes a memory 1004, a processor 1002, and a computer program stored in the memory 1004 and executable on the processor 1002. The processor 1002 executes the program to implement the steps described in any embodiment of the vibration suppression method for the rolling mill.

[0069] Among them, Figure 10In this document, a bus architecture (represented by bus 1000) is used. Bus 1000 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 1002 and memory represented by memory 1004. Bus 1000 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 1005 provides an interface between bus 1000 and receiver 1001 and transmitter 1003. Receiver 1001 and transmitter 1003 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 1002 is responsible for managing bus 1000 and general processing, while memory 1004 may be used to store data used by processor 1002 during operation.

[0070] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0071] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0072] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0073] 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 the present invention, 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 described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0074] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A vibration suppression method for a rolling mill, characterized in that, include: The first fluctuating rolling force of the rolling mill is obtained, which is the rolling force generated due to vibration of the rolling mill within a first frequency range; wherein, the total rolling force of the rolling mill is obtained, which is the sum of the set rolling force of the rolling mill and the second fluctuating rolling force of the rolling mill, which is the rolling force generated due to vibration of the rolling mill within a second frequency range, the second frequency range including the first frequency range; the total rolling force is processed based on a preset target bandpass filter function to obtain the first fluctuating rolling force; Based on the first fluctuating rolling force, the roll gap position deviation of the rolling mill is determined, wherein the roll gap position deviation is the position deviation of the current roll gap position of the rolling mill relative to a set roll gap position; wherein, based on a preset correspondence and the first fluctuating rolling force, the rolling mill extension is determined, wherein the rolling mill extension is the deformation of the mill's arch and rolls under a certain rolling force, and the preset correspondence is the correspondence between the rolling force of the rolling mill and the rolling mill extension; based on the rolling mill extension, the roll gap position deviation of the rolling mill is determined; Based on the roll gap position deviation of the rolling mill, the roll gap control system of the rolling mill is controlled so that the roll gap position deviation of the rolling mill is less than a preset position deviation threshold.

2. The method of damping vibrations of a rolling mill according to claim 1, characterized in that, The target bandpass filter function is predetermined through the following steps: The first frequency range is determined based on the preset rolling speed of the rolling mill; Based on the first frequency range, the target bandpass filter function is selected from a plurality of preset bandpass filter functions.

3. The method of damping vibrations of a rolling mill according to claim 2, characterized in that, Determining the first frequency range based on the preset rolling speed of the rolling mill includes: The product of the preset rolling speed and the preset coefficient of the rolling mill is taken as the target vibration frequency; The sum of the target vibration frequency and the preset frequency is taken as the upper limit of the first frequency range; The difference between the target vibration frequency and the preset frequency is used as the lower limit of the first frequency range.

4. The vibration suppression method for a rolling mill according to any one of claims 1-3, characterized in that, The first frequency range is 6Hz~10Hz, 7Hz~11Hz, 8Hz~12Hz, 9Hz~13Hz or 10Hz~14Hz.

5. The vibration suppression method for a rolling mill according to any one of claims 1-3, characterized in that, The target bandpass filter function is the Butterworth filter function.

6. The method of damping vibrations of a rolling mill according to claim 1, characterized in that, The roll gap control system includes a hydraulic cylinder; the roll gap control system for controlling the rolling mill based on the roll gap position deviation includes: The position adjustment amount of the piston of the hydraulic cylinder is determined based on the roll gap position deviation of the rolling mill. The piston position of the hydraulic cylinder is adjusted based on the position adjustment amount.

7. A vibration damping device for a rolling mill, characterized by include: A rolling force acquisition unit is used to acquire a first fluctuating rolling force of a rolling mill, wherein the first fluctuating rolling force is the rolling force generated due to vibration of the rolling mill within a first frequency range; wherein, the unit acquires the total rolling force of the rolling mill, wherein the total rolling force is the sum of the set rolling force of the rolling mill and the second fluctuating rolling force of the rolling mill, wherein the second fluctuating rolling force is the rolling force generated due to vibration of the rolling mill within a second frequency range, and the second frequency range includes the first frequency range; and processes the total rolling force based on a preset target bandpass filter function to obtain the first fluctuating rolling force; The deviation determination unit is used to determine the roll gap position deviation of the rolling mill based on the first fluctuating rolling force, wherein the roll gap position deviation is the position deviation of the current roll gap position of the rolling mill relative to a set roll gap position; wherein, based on a preset correspondence and the first fluctuating rolling force, the rolling mill extension is determined, wherein the rolling mill extension is the deformation of the mill's arch and rolls under a certain rolling force, and the preset correspondence is the correspondence between the rolling force of the rolling mill and the rolling mill extension; and based on the rolling mill extension, the roll gap position deviation of the rolling mill is determined. The control unit is used to control the roll gap control system of the rolling mill based on the roll gap position deviation, so that the roll gap position deviation of the rolling mill is less than a preset position deviation threshold.

8. An electronic device, comprising: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of any one of claims 1-6.

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