Deviation correction control method under abnormal rolling condition of hot continuous rolling and finish rolling

Abstract

The invention provides a deviation rectification control method under the rolling abnormal condition of hot continuous rolling and finish rolling, and relates to the technical field of steel rolling. The method comprises the steps that after strip steel is threaded in a finishing mill and stabilized for a period of time, the rolling force deviation of the two sides of a rolling mill, the deviation of the actual tension and the set tension of a front loop and the opening degree deviation of the two sides of a front guide are monitored in real time; when the opening degree deviation or the tension deviation is larger than a set threshold value, the rolling force deviation of the two sides of the current rolling mill is stored, and the average roll gap is kept unchanged; whether the opening degree deviation changes continuously, whether the tension deviation changes continuously exceed a set threshold value and whether the rolling force deviation changes exceed a set threshold value are judged; calculating roll gap deviation correction on two sides of the rolling mill, and increasing a roll gap deviation adjustment range; and the adjustment amount is sent to a manual operation picture, and after manual intervention, the automatic adjustment amount of the roll gap deviation is kept unchanged. The method solves the problem of rolling waste caused by deviation of the strip steel in the hot continuous rolling and finish rolling process, and has positive significance for improving the rolling stability.

Description

Technical Field

[0001] This invention relates to the field of steel rolling technology, and in particular to a method for correcting deviations and controlling abnormalities in hot continuous rolling finishing. Background Technology

[0002] In the field of hot strip rolling, especially during the continuous experimentation with high-standard, extreme materials, and new steel grades, problems such as strip deviation, extrusion mill inlet guides, and strip tension loss between stands are prone to occur during the finishing rolling process. These issues can lead to scrap if manual intervention is not timely. Therefore, optimizing the control parameters for strip in hot strip rolling, improving the control system, and adjusting roll gap deviation through automation are of positive significance in solving the rolling instability problems caused by strip deviation during this process.

[0003] Currently, there is no solution in the existing technology to address the deviations in looper tension and inlet guide opening during the finishing rolling process, or to correct the deviations in rolling force on both sides of the mill by adjusting the roll gap. Patent application CN115245959B proposes an online identification and early warning method for abnormal stability in PC mill finishing. It discloses a method for acquiring rolling force data of the strip's PC angle, drive side, and working side over a period of time from a basic automation computer, processing the data, and identifying anomalies, thus triggering an alarm for abnormal mill stability and prompting technicians to handle the issue promptly. Patent application CN119281832A proposes a method to solve the problem of central rolling defects during the finishing rolling of thin specifications in hot rolling processes. It discloses a method that adaptively adjusts the guide opening, AGC, maximum acceleration of the speed-up rolling, looper height, and looper tension, which can reduce or even avoid central rolling defects during the finishing rolling of thin specifications in hot rolling processes.

[0004] In summary, the existing technology lacks a control scheme that addresses the looper tension deviation, inlet guide opening deviation, and roll gap deviation adjustment and correction based on the rolling force deviation on both sides of the mill during the finishing rolling process, in order to solve the rolling stability problem caused by strip deviation during the finishing rolling process. Summary of the Invention

[0005] To address the technical problem of rolling instability caused by strip deviation during hot strip finishing rolling in existing technologies, this invention provides a method for correcting deviation and controlling abnormal conditions during hot strip finishing rolling. The technical solution is as follows: A method for correcting deviations and controlling rolling abnormalities in hot strip finishing mills, the method comprising: S1. The strip steel stabilizes for a period of time after the finishing mill strip is threaded. TAfterwards, real-time monitoring of the rolling force deviation on both sides of the rolling mill. F do Deviation between actual tension and set tension of the front looper T dev and the deviation of the opening on both sides of the forward-facing naval escort G do ; S2. When the deviation of the opening degree on both sides of the standby guide or the deviation of the actual tension of the looper in front of the mill from the set tension is greater than the set threshold, store the current rolling force deviation on both sides of the mill and keep the average roll gap unchanged. S3. Check whether the opening deviation on both sides of the front guide of the machine continues to change, and whether the actual tension of the looper and the set tension deviation continue to exceed the set threshold, and determine whether the rolling force deviation on both sides of the mill exceeds the set threshold; if the opening deviation on both sides of the front guide continues to change, or the actual tension of the looper and the set tension deviation continue to exceed the set threshold, or the rolling force deviation on both sides of the mill exceeds the set threshold, then adjust the roll gap to correct the deviation. S4. Based on the change in rolling force deviation on both sides of the mill, calculate the correction amount of roll gap deviation on both sides of the mill, and increase the roll gap deviation adjustment range to obtain the roll gap deviation adjustment amount; S5. The roll gap deviation adjustment amount is sent to the manual operation screen in the form of an alarm to remind the operator to intervene further according to the on-site situation. After manual intervention, the roll gap deviation adjustment amount remains unchanged.

[0006] During a period of time in S1 T 1 represents 1~5 seconds, given based on experience.

[0007] The threshold value is set for the opening deviation on both sides of the mid-engine forward guide in S2. G lim The deviation between the actual tension of the looper at the front of the machine and the set tension is set to a threshold value of 0.2~0.5mm (given based on experience). T lim The value is 1000~5000 N·m (given based on experience).

[0008] The deviation of the opening on both sides of the S2 mid-engine front guide G do The absolute value exceeds the set threshold for the deviation of the opening on both sides of the forward-facing navigator. G lim Or the actual tension of the looper at the front of the machine deviates from the set tension. T dev The absolute value exceeds the set threshold for the tension deviation of the looper before the machine. T lim This is recorded as an abnormal rolling condition, indicating a deviation in rolling force on both sides of the current rolling mill. F do Store it, denoted as Fdos The unit is ton, and the average roll gap remains constant.

[0009] In S3, the deviation of the opening on both sides of the forward-looking satellite is determined. G do The formula for calculating whether a change is continuous is:

[0010] in, G doe ( t This indicates the deviation in the opening degree on both sides of the forward-facing guard. G do Changes between the two periods; G do ( t This indicates the current cycle value of the aperture deviation on both sides of the forward-facing warhead; G do ( t- 1) indicates the value of the deviation of the opening on both sides of the front guide in the previous cycle.

[0011] The rolling force deviation on both sides of the rolling mill in S3 F do In storing values F dos The threshold for the change based on the basic principle is: F lim The value ranges from 10 to 50, and the unit is ton, given based on experience.

[0012] The formula for calculating the correction amount of the roll gap deviation on both sides of the rolling mill in S4 is as follows:

[0013] in, Gap do This represents the correction amount for the deviation of the roll gap on both sides of the rolling mill, denoted as the difference between the roll gap on the drive side and the roll gap on the operating side. F do This indicates the current deviation of rolling force on both sides of the rolling mill; F dos Stores the current rolling force deviation when an abnormal rolling condition is indicated; F lim This indicates the threshold value for the change in rolling force deviation after an abnormal rolling condition. kp This represents the correction coefficient for the deviation of the roll gap on both sides of the rolling mill. It is given empirically and its value ranges from 0.01 to 0.05.

[0014] The roller gap deviation adjustment range in S4 Gap lim , is given empirically, and its value ranges from -0.2 to 0.2, with the unit being mm.

[0015] In S4, when the calculated correction amount of the roll gap deviation on both sides of the mill is within the roll gap deviation adjustment range, the roll gap deviation adjustment amount is the calculated correction amount of the roll gap deviation on both sides of the mill. When the calculated correction amount for the roll gap deviation on both sides of the mill exceeds the roll gap deviation adjustment range, the roll gap deviation adjustment amount is the roll gap deviation adjustment range value that is closest to the correction amount for the roll gap deviation on both sides of the mill.

[0016] After the roll gap deviation is automatically adjusted in S5, the adjusted amount of roll gap deviation is sent to the manual operation screen as an auxiliary prompt. If the operator participates in the adjustment, the automatically adjusted roll gap deviation will remain unchanged, and subsequent adjustments will be made by manual intervention without further monitoring.

[0017] In another aspect, the present invention also provides an electronic device comprising a processor and a memory; wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the above-described method.

[0018] In another aspect, the present invention also provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the above method.

[0019] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: The above scheme has a positive effect on improving rolling stability by adjusting and correcting the looper tension deviation, the inlet guide opening deviation, and the roll gap deviation based on the rolling force deviation on both sides of the mill during the finishing rolling process. Attached Figure Description

[0020] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of a method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing, provided by an embodiment of the present invention. Figure 2 This is a schematic diagram of rolling state data monitoring provided in an embodiment of the present invention, wherein (a) is the looper torque deviation during the rolling process, (b) is the mill inlet guide opening deviation during the rolling process, and (c) is the rolling force deviation on both sides of the mill during the rolling process. Figure 3 This is a system block diagram of the electronic device provided in the embodiments of the present invention. Detailed Implementation

[0022] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0023] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0024] In this embodiment of the invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When the difference is not emphasized, the meaning they express is the same.

[0025] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0026] This invention provides a method for correcting deviations and controlling rolling abnormalities in hot strip finishing mills. For example... Figure 1 The flowchart shown illustrates a method for corrective control in case of abnormal rolling conditions in hot strip mill finishing. This method may include the following steps: S1. The strip steel stabilizes for a period of time after the finishing mill strip is threaded. T Afterwards, real-time monitoring of the rolling force deviation on both sides of the rolling mill. F do Deviation between actual tension and set tension of the front looper T dev and the deviation of the opening on both sides of the forward-facing naval escort G do ; Among them, the time period T 1 represents 1~5 seconds, given based on experience.

[0027] S2. When the deviation of the opening degree on both sides of the standby guide or the deviation of the actual tension of the looper in front of the mill from the set tension is greater than the set threshold, store the current rolling force deviation on both sides of the mill and keep the average roll gap unchanged. Specifically, Threshold setting for the opening deviation on both sides of the forward-facing navigator G lim The deviation between the actual tension of the looper at the front of the machine and the set tension is 0.2~0.5mm, which is the set threshold. T lim The range is 1000~5000 N·m; Misalignment of the opening on both sides of the aircraft's forward-facing naval escort G do The absolute value exceeds the set threshold for the deviation of the opening on both sides of the forward-facing navigator. G limOr the actual tension of the looper at the front of the machine deviates from the set tension. T dev The absolute value exceeds the set threshold for the tension deviation of the looper before the machine. T lim This is recorded as an abnormal rolling condition, indicating a deviation in rolling force on both sides of the current rolling mill. F do Store it, denoted as F dos The unit is ton, and the average roll gap remains constant; S3. Determine whether the opening deviation on both sides of the machine front guide continues to change, and whether the deviation between the actual tension of the looper and the set tension continues to exceed the set threshold, and determine whether the deviation between the rolling force on both sides of the mill exceeds the set threshold; if the opening deviation on both sides of the machine front guide continues to change, or the deviation between the actual tension of the looper and the set tension continues to exceed the set threshold, or the deviation between the rolling force on both sides of the mill exceeds the set threshold, then adjust the roll gap to correct the deviation. Specifically, Determine the deviation of the opening on both sides of the front guide. G do The formula for calculating whether a change is continuous is:

[0028] in, G doe ( t This indicates the deviation in the opening degree on both sides of the forward-facing guard. G do Changes between the two periods; G do ( t This indicates the current cycle value of the aperture deviation on both sides of the forward-facing warhead; G do ( t- 1) Indicates the deviation of the opening on both sides of the forward-facing nacelle in the previous cycle; Rolling force deviation on both sides of the rolling mill F do In storing values F dos The threshold for the change based on the basic principle is: F lim The value ranges from 10 to 50, and the unit is ton; S4. Based on the change in rolling force deviation on both sides of the mill, calculate the correction amount of roll gap deviation on both sides of the mill, and increase the roll gap deviation adjustment range to obtain the roll gap deviation adjustment amount; Specifically, The formula for calculating the correction amount of the roll gap deviation on both sides of the rolling mill is:

[0029] in, Gap do This represents the correction amount for the deviation of the roll gap on both sides of the rolling mill, denoted as the difference between the roll gap on the drive side and the roll gap on the operating side. F do This indicates the current deviation of rolling force on both sides of the rolling mill; F dos Stores the current rolling force deviation when an abnormal rolling condition is indicated; F lim This indicates the threshold value for the change in rolling force deviation after an abnormal rolling condition. kp This represents the correction coefficient for the deviation of the roll gap on both sides of the rolling mill. It is given empirically and its value ranges from 0.01 to 0.05. Roll gap deviation adjustment range Gap lim The value is given empirically and ranges from -0.2 to 0.2, with the unit being mm; S5. The roll gap deviation adjustment amount is sent to the manual operation screen in the form of an alarm to remind the operator to intervene further according to the on-site situation. After manual intervention, the roll gap deviation adjustment amount remains unchanged.

[0030] After the roll gap deviation is automatically adjusted, the adjusted amount of roll gap deviation is sent to the manual operation screen as an auxiliary prompt. If the operator participates in the adjustment, the automatically adjusted roll gap deviation will remain unchanged, and subsequent adjustments will be made by manual intervention.

[0031] In summary, this embodiment provides a control method for abnormal conditions in hot strip mill finishing rolling. This control method improves rolling stability by adjusting and correcting the looper tension deviation, the inlet guide opening deviation, and the roll gap deviation based on the rolling force deviation on both sides of the mill during the finishing rolling process.

[0032] Example 2

[0033] This embodiment applies the control method for abnormal rolling conditions in hot continuous rolling mill to a hot rolling mill, and takes the F3 finishing mill as an example to further illustrate the implementation process of the method of the present invention.

[0034] Specifically, in this application scenario, the method of the present invention is operated according to the following steps: (1) After the strip is threaded and stabilized for 5 seconds on the finishing mill, the rolling force deviation on both sides of the finishing mill F3, the deviation between the actual tension and the set tension of the looper in front of the mill, and the deviation of the opening degree on both sides of the guide in front of the mill are monitored in real time; among which the rolling force deviation on both sides of the mill F do The actual tension of the looper at the front of the machine is stable at 50 tons, and the deviation between the set tension and the actual tension is as follows: T dev Stabilized at 200 N·m, the deviation of the opening on both sides of the forward-facing warhead. Gdo It stabilized at 0.05mm.

[0035] (2) After rolling for a period of time, the opening deviation on both sides of the front guide becomes 1mm, which is greater than the set threshold of 0.5mm. The actual tension of the front looper and the set tension deviation increase to 2000N·m, which is greater than the set threshold of 1000N·m. The current rolling force deviation on both sides of the mill is stored as 80ton, and the average roll gap remains unchanged.

[0036] (3) Determine the periodic deviation of the opening on both sides of the front guide. G doe (t) The actual tension of the looper continues to increase, and the deviation between the actual tension and the set tension continues to exceed the set threshold of 1000 N·m. The current rolling force deviation on both sides of the mill increases to 100 tons, and the change exceeds the set threshold of 10 tons. (4) Calculate the roll gap deviation correction amount on both sides of the rolling mill based on the change in rolling force deviation on both sides of the rolling mill, and add protection for the roll gap deviation adjustment range.

[0037] The formula for calculating the correction amount of the roll gap deviation on both sides of the rolling mill is:

[0038] in, kp The value is 0.01, representing the correction amount for the deviation of the roll gap on both sides of the rolling mill. Gap do The calculated value is -0.1mm, and the roll gap deviation adjustment range is... Gap lim The value is 0.2mm.

[0039] (5) The above roll gap deviation adjustment amount of -0.1mm is sent to the manual operation screen in the form of an alarm to remind the operator to intervene further according to the on-site situation. After manual intervention, the roll gap deviation adjustment amount remains unchanged.

[0040] The rolling condition data monitoring process is as follows: Figure 2 As shown, (a), (b), and (c) are feedback data from the three devices—looper, guide, and pressing cylinder—when abnormalities occur in the strip during rolling. These data points allow for real-time detection of special situations and early intervention. In (a), the feedback data on the looper torque deviation is relatively stable in the initial stage of rolling, but after a period of rolling, drastic fluctuations are observed. Similarly, in (b), the guide opening deviation gradually increases from around 0 mm to 5 mm, and in (c), the rolling force deviation increases by approximately 40 tons from a stable to an unstable stage. By combining the feedback data in the figures with the detailed steps in Example 2, the timing of abnormalities can be determined sequentially, and the roll gap correction amount can be calculated based on the actual feedback data.

[0041] Example 3

[0042] This embodiment provides an electronic device, such as... Figure 3 As shown, the electronic device includes a processor and a memory; wherein the processor and the memory can be connected via a communication bus; the memory stores at least one instruction, which is loaded and executed by the processor to implement the method of the first embodiment described above. Furthermore, the electronic device may also include a transceiver, the processor and the transceiver can be connected via a communication bus, and the transceiver is used to communicate with other devices.

[0043] Below, in conjunction with Figure 3 A detailed introduction to each component of this electronic device is provided below: The processor is the control center of the electronic device. The electronic device may include multiple processors, each of which can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The term "processor" can refer to a single processor or a collective term for multiple processing elements. For example, a processor can be one or more central processing units (CPUs), other general-purpose processors, application-specific integrated circuits (ASICs), or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more digital signal processors (DSPs), one or more field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor can perform various functions of the electronic device by running or executing software programs stored in memory and by calling data stored in memory.

[0044] In a specific implementation, as one example, the processor may include one or more CPUs, for example... Figure 3 CPU0 and CPU1 shown are, of course, merely illustrative examples.

[0045] The memory is used to store the software program that executes the solution of the present invention, and the processor controls its execution. For specific implementation methods, please refer to the above method embodiments, which will not be repeated here.

[0046] Optionally, the memory may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory may be integrated with the processor or exist independently, and may be accessed through the interface circuit of the electronic device ( Figure 3 (Not shown in the image) is coupled to the processor; however, this embodiment of the invention does not impose specific limitations on this.

[0047] The transceiver may include a receiver and a transmitter. Figure 3 (Not shown separately). The receiver is used to implement the receiving function, and the transmitter is used to implement the transmitting function. The transceiver can be integrated with the processor or exist independently, and can be connected through the interface circuit of the electronic device (…). Figure 3 (Not shown in the image) is coupled to the processor, and this embodiment of the invention does not specifically limit this.

[0048] In addition, it should be noted that, Figure 3 The structure of the electronic device shown is not intended to limit the device. Actual devices may include more or fewer components than shown, or combine certain components, or have different component arrangements. Furthermore, the technical effects achieved by this electronic device when performing the method of the first embodiment described above can be referenced to the technical effects described in the first embodiment; therefore, they will not be repeated here.

[0049] Example 4

[0050] This embodiment provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the method of the first embodiment described above. The computer-readable storage medium may be a ROM, random access memory, CD-ROM, magnetic tape, floppy disk, or optical data storage device, etc. The instruction stored therein can be loaded and executed by a processor in a terminal.

[0051] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely or partially hardware embodiment, a completely or partially software embodiment, or an embodiment combining software and hardware aspects. Moreover, when implemented in software, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any usable medium accessible to a computer or a data storage device such as a server or data center containing one or more sets of usable media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive (SSD).

[0052] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. 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, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions 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.

[0053] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate 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 1The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal 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.

[0054] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device 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 terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element. Furthermore, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Additionally, the character " / " in this text generally indicates an "or" relationship between the preceding and following objects, but it can also indicate an "AND / OR" relationship. Please refer to the context for specific interpretations. "At least one" refers to one or more items, while "more than" refers to two or more items. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can be represented as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0055] Furthermore, it is understood that in various embodiments of the present invention, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0056] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0057] In the several embodiments provided by this invention, 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 functional modules / 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 device, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., 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. Additionally, the functional units in the various embodiments of this invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0058] If the method 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, or the part that contributes to the prior art, or a 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, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing, characterized in that, The method includes: S1. The strip steel stabilizes for a period of time after the finishing mill strip is threaded. T Afterwards, real-time monitoring of the rolling force deviation on both sides of the rolling mill. F do Deviation between actual tension and set tension of the front looper T dev and the deviation of the opening on both sides of the forward-facing naval escort G do ; S2. When the deviation of the opening degree on both sides of the standby guide or the deviation of the actual tension of the looper in front of the mill from the set tension is greater than the set threshold, store the current rolling force deviation on both sides of the mill and keep the average roll gap unchanged. S3. Check whether the opening deviation on both sides of the front guide of the machine continues to change, and whether the deviation between the actual tension of the looper and the set tension continues to exceed the set threshold, and determine whether the deviation of the rolling force on both sides of the mill exceeds the set threshold; if the opening deviation on both sides of the front guide continues to change, or the deviation between the actual tension of the looper and the set tension continues to exceed the set threshold, or the deviation of the rolling force on both sides of the mill exceeds the set threshold, then adjust the roll gap deviation to correct the deviation. S4. Based on the change in rolling force deviation on both sides of the mill, calculate the correction amount of roll gap deviation on both sides of the mill, and increase the roll gap deviation adjustment range to obtain the roll gap deviation adjustment amount; S5. The roll gap deviation adjustment amount is sent to the manual operation screen in the form of an alarm to remind the operator to intervene further according to the on-site situation. After manual intervention, the roll gap deviation adjustment amount remains unchanged.

2. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, During a period of time in S1 T 1 represents 1~5 seconds, given based on experience.

3. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, The threshold value is set for the opening deviation on both sides of the mid-engine forward guide in S2. G lim The deviation between the actual tension of the looper at the front of the machine and the set tension is 0.2~0.5mm, which is the set threshold. T lim The value is 1000~5000 N·m.

4. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, The deviation of the opening on both sides of the S2 mid-engine front guide G do The absolute value exceeds the set threshold for the deviation of the opening on both sides of the forward-facing navigator. G lim Or the actual tension of the looper at the front of the machine deviates from the set tension. T dev The absolute value exceeds the set threshold for the tension deviation of the looper before the machine. T lim This is recorded as an abnormal rolling condition, indicating a deviation in rolling force on both sides of the current rolling mill. F do Store it, denoted as F dos The unit is ton, and the average roll gap remains constant.

5. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, In S3, the deviation of the opening on both sides of the forward guide is determined. G do The formula for calculating whether a change is continuous is: in, G doe ( t This indicates the deviation in the opening degree on both sides of the forward-facing guard. G do Changes between the two periods; G do ( t This indicates the current cycle value of the aperture deviation on both sides of the forward-facing warhead; G do ( t- 1) indicates the value of the deviation of the opening on both sides of the front guide in the previous cycle.

6. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, The rolling force deviation on both sides of the rolling mill in S3 F do In storing values F dos The threshold for the change based on the basic principle is: F lim The value ranges from 10 to 50, and the unit is ton.

7. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, The formula for calculating the correction amount of the roll gap deviation on both sides of the rolling mill in S4 is as follows: in, Gap do This represents the correction amount for the deviation of the roll gap on both sides of the rolling mill, denoted as the difference between the roll gap on the drive side and the roll gap on the operating side. F do This indicates the current deviation of rolling force on both sides of the rolling mill; F dos Stores the current rolling force deviation when an abnormal rolling condition is indicated; F lim This indicates the threshold value for the change in rolling force deviation after an abnormal rolling condition. kp This represents the correction coefficient for the deviation of the roll gap on both sides of the rolling mill. It is given empirically and its value ranges from 0.01 to 0.

05.

8. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, The roller gap deviation adjustment range in S4 Gap lim The value is given empirically and ranges from -0.2 to 0.2, with the unit being mm.

9. The method for correcting deviations and controlling abnormalities in hot continuous rolling mill finishing as described in claim 1, characterized in that, In S4, when the calculated correction amount of the roll gap deviation on both sides of the mill is within the roll gap deviation adjustment range, the roll gap deviation adjustment amount is the calculated correction amount of the roll gap deviation on both sides of the mill. When the calculated correction amount for the roll gap deviation on both sides of the mill exceeds the roll gap deviation adjustment range, the roll gap deviation adjustment amount is the roll gap deviation adjustment range value that is closest to the correction amount for the roll gap deviation on both sides of the mill.

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