Control methods, devices, media, and electronic equipment for hot strip finishing systems

Abstract

This application discloses a control method, apparatus, medium, and electronic equipment for a hot strip mill finishing system. The method includes: acquiring the tensile stress and length of the strip between adjacent stands at the current signal cycle, respectively as the current tensile stress and current strip length; and acquiring the tensile stress and length of the strip between adjacent stands at the start point of the current control cycle, respectively as the starting tensile stress and starting strip length; if a conventional control signal for looper operation between the adjacent stands is triggered, then based on the current tensile stress, the current strip length, the starting tensile stress, and the starting strip length, calculating the speed adjustment amount of the first stand in the rolling direction among the adjacent stands, and adjusting the rolling speed of the first stand based on the speed adjustment amount. The technical solution provided by this application can improve the accuracy of controlling the rolling speed of the stands during the looper operation stage.

Description

Technical Field

[0001] This application belongs to the field of hot strip mill finishing control technology, and particularly relates to a hot strip mill finishing system control method, device, medium and electronic equipment. Background Technology

[0002] Currently, in the starting control stage of a hot strip mill finishing system, problems easily arise such as excessive tension due to a continuous decrease in the amount of sleeve or excessive loop angle due to a continuous increase in the amount of sleeve. In such cases, because tension or loop angle is controlled separately, it is difficult to adjust the rolling speed between the stands of the hot strip mill finishing mill to the normal range in a short time. Therefore, a method is needed to improve the accuracy of controlling the rolling speed of the stands during the starting stage. Summary of the Invention

[0003] The embodiments of this application provide a control method, device, medium, and electronic equipment for a hot continuous rolling finishing system. The method can improve the accuracy of controlling the rolling speed of the stand during the starting stage.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part by practice of this application.

[0005] According to a first aspect of the embodiments of this application, a control method for a hot strip mill finishing system is provided, characterized in that the hot strip mill finishing system includes multiple stands, and the method includes: acquiring the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle, respectively as the current tensile stress and the current strip length; acquiring the tensile stress and length of the strip between adjacent stands corresponding to the starting point of the current control cycle, respectively as the starting tensile stress and the starting strip length; the current control cycle is any one of the second to the last control cycle in the control process of the hot strip mill finishing system, and includes multiple signal cycles in one control cycle; if a regular control signal for the loop between the adjacent stands is triggered, then based on the current tensile stress, the current strip length, the starting tensile stress, and the starting strip length, calculating the speed adjustment amount of the first stand in the rolling direction among the adjacent stands, and adjusting the rolling speed of the first stand based on the speed adjustment amount.

[0006] In some embodiments of this application, based on the foregoing scheme, the method further includes: in response to the formation of a looper between adjacent frames, recording the looper forming time of the adjacent frames, and monitoring the instantaneous tensile stress of the strip between the adjacent frames in real time; if the instantaneous tensile stress is greater than or equal to a preset tensile stress threshold or the looper forming time is greater than or equal to a first preset time threshold, then setting the current time as the time corresponding to the start point of the first control cycle, and setting the time corresponding to the end point of the first control cycle as the time corresponding to the start point of the second control cycle.

[0007] In some embodiments of this application, based on the foregoing scheme, the method further includes: if the conventional control signal for the loop between the adjacent stands is not triggered, then determining whether the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to a second preset time threshold; if the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to the second preset time threshold, then calculating the speed adjustment amount of the first stand in the rolling direction among the adjacent stands based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, and adjusting the rolling speed of the first stand based on the speed adjustment amount.

[0008] In some embodiments of this application, based on the foregoing scheme, after adjusting the rolling speed of the first stand based on the speed adjustment amount, the method further includes: determining the time corresponding to the current signal cycle as the time corresponding to the start point of the next control cycle, and controlling the hot continuous rolling finishing system to enter the next signal cycle, and controlling the hot continuous rolling finishing system to enter the next control cycle, so as to return to the step of obtaining the tensile stress and length of the strip between adjacent stands in the current signal cycle.

[0009] In some embodiments of this application, based on the foregoing scheme, the method further includes: if the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is less than the second preset time threshold, then control the hot continuous rolling finishing system to enter the next signal cycle, so as to return to the step of obtaining the tensile stress and length of the strip between adjacent stands in the current signal cycle.

[0010] In some embodiments of this application, based on the foregoing scheme, before obtaining the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle, the method further includes: in response to the formation of the looper between the adjacent stands, recording the looper forming time of the adjacent stands; if the looper forming time is greater than or equal to a third preset time threshold, then ending the hot strip finishing system control process and controlling the hot strip finishing system to switch from the looper starting stage to the conventional control stage.

[0011] In some embodiments of this application, based on the foregoing scheme, the speed adjustment amount of the first stand in the rolling direction among the adjacent stands is calculated using the following formula:

[0012]

[0013] Where, ΔV i τ represents the speed adjustment of the first stand in the rolling direction among adjacent stands; i τ represents the time corresponding to the current signal period; i0 T(τ) represents the time corresponding to the start point of the current control cycle; i ) represents the current tensile stress; T i0 L(τ) represents the initial tensile stress; i ) indicates the current strip length; L i0 Indicates the initial strip length; E i L represents the elastic modulus of the strip between adjacent frames; i This indicates the distance between adjacent racks.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] The hot strip finishing system control method provided by this invention firstly determines the start time of the first control cycle of the hot strip finishing system by identifying the moment when the stand triggers the bite signal after triggering it. The bite signal is triggered based on the looper forming time between adjacent stands and the instantaneous tensile stress of the strip between adjacent stands. The start time of the first control cycle of the hot strip finishing system is determined when the instantaneous tensile stress is greater than or equal to a preset tensile stress threshold, or when the looper forming time is greater than or equal to a first preset time threshold.

[0016] Then, since the regular control signal of the loop between adjacent frames will not be triggered in the first control cycle, starting from the second control cycle, the tension stress and length of the strip between adjacent frames in the current signal cycle are obtained and used as the current tension stress and current strip length, respectively. In addition, the tension stress and length of the strip between adjacent frames at the start point of the current control cycle are obtained and used as the starting tension stress and starting strip length, respectively.

[0017] If the regular control signal of the looper between adjacent stands is triggered, the speed adjustment amount of the first stand in the rolling direction in the adjacent stands is calculated based on the current tensile stress, current strip length, initial tensile stress, and initial strip length. The rolling speed of the first stand is adjusted based on the speed adjustment amount, and the control process of the hot strip finishing system to control the rolling speed of the stand is terminated.

[0018] If the regular control signal of the looper between adjacent stands is not triggered, when the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to the second preset time threshold, the speed adjustment amount of the first stand in the rolling direction of the adjacent stands is calculated based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, and the rolling speed of the first stand is adjusted based on the speed adjustment amount, so that the hot strip finishing system enters the control of the next signal cycle.

[0019] It should be noted that, as the looper forming time between adjacent stands increases in real time, when the looper forming time between adjacent stands is greater than or equal to the third time threshold, the regular control signal of the looper between adjacent stands will be forcibly triggered. At this time, the speed adjustment amount of the first stand in the rolling direction in the adjacent stands is calculated based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length. The rolling speed of the first stand is adjusted based on the speed adjustment amount, and the control process of the hot strip finishing system controlling the rolling speed of the stand is terminated.

[0020] Based on the above method, the hot strip mill finishing system control method provided by the present invention can improve the accuracy of controlling the rolling speed of the stand during the starting stage.

[0021] According to a second aspect of the embodiments of this application, a control device for a hot strip mill finishing system is provided, characterized in that the hot strip mill finishing system includes multiple stands, and the device includes: an acquisition unit, configured to acquire the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle, respectively as the current tensile stress and the current strip length, and to acquire the tensile stress and length of the strip between adjacent stands corresponding to the starting point of the current control cycle, respectively as the starting tensile stress and the starting strip length, wherein the current control cycle is any one of the second to the last control cycle in the control process of the hot strip mill finishing system, and includes multiple signal cycles in one control cycle; and a first execution unit, configured to, if a regular control signal for the looper between the adjacent stands is triggered, based on the current tensile stress, the current strip length, and the starting tensile stress, ... The first execution unit is configured to: calculate the speed adjustment amount of the first stand in the rolling direction among the adjacent stands, based on the initial strip length, and adjust the rolling speed of the first stand based on the speed adjustment amount; and terminate the hot strip finishing system control process; if the conventional control signal of the looper between the adjacent stands is not triggered, and the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to a second preset time threshold, then calculate the speed adjustment amount of the first stand in the rolling direction among the adjacent stands based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, and adjust the rolling speed of the first stand based on the speed adjustment amount; and determine the time corresponding to the current signal cycle as the time corresponding to the start point of the next control cycle.

[0022] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium stores at least one piece of program code, the at least one piece of program code being loaded and executed by a processor to implement the operations performed by the method.

[0023] According to a fourth aspect of the present application, an electronic device is provided, characterized in that the electronic device includes one or more processors and one or more memories, wherein the one or more memories store at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to implement the operation performed by the method.

[0024] The beneficial effects of the embodiments of the second to fourth aspects described above can be referred to the beneficial effects of the first aspect and the embodiments of the first aspect described above, and will not be repeated here.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0027] Figure 1 A flowchart of the hot strip finishing system control method in an embodiment of this application is shown;

[0028] Figure 2 A layout diagram of the rolling mill stand in an embodiment of this application is shown;

[0029] Figure 3 The control effect diagram of the hot strip finishing system in the embodiment of this application is shown;

[0030] Figure 4 This paper shows a control effect diagram of another hot strip finishing system in an embodiment of this application;

[0031] Figure 5 A schematic diagram of the control device for the hot strip finishing system in an embodiment of this application is shown;

[0032] Figure 6 A schematic diagram of the structure of an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0035] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0036] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0037] The following section will elaborate on this application:

[0038] Figure 1 A flowchart illustrating a hot strip mill finishing system control method according to an embodiment of this application is shown. The hot strip mill finishing system control method can be executed by a device with computational processing capabilities, such as a hot strip mill finishing system control device. (Refer to...) Figure 1 As shown, the control method for the hot strip finishing system includes at least steps 110 to 130, which are described in detail below:

[0039] In step 110, the tensile stress and length of the strip between adjacent stands in the current signal cycle are obtained, and are respectively used as the current tensile stress and the current strip length. The tensile stress and length of the strip between adjacent stands at the starting point of the current control cycle are also obtained, and are respectively used as the starting tensile stress and the starting strip length. The current control cycle is any one of the second to the last control cycle in the hot strip finishing system control process, and includes multiple signal cycles in one control cycle.

[0040] In this application, the stand speed adjustment only occurs within any one of the control cycles from the second to the last control cycle in the hot strip finishing system control process. Therefore, within any one of the control cycles from the second to the last control cycle in the hot strip finishing system control process, the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle are obtained, and these are respectively used as the current tensile stress and the current strip length. Additionally, the tensile stress and length of the strip between adjacent stands corresponding to the starting point of the current control cycle are obtained, and these are respectively used as the starting tensile stress and the starting strip length. A single control cycle includes multiple signal cycles. For example, if the duration of one control cycle is 0.15s and the duration of one signal cycle is 0.05s, then one control cycle includes three signal cycles.

[0041] Furthermore, in this embodiment of the application, the hot strip finishing system control method further includes: in response to the formation of a looper between adjacent stands, recording the looper forming time of the adjacent stands, and monitoring the instantaneous tensile stress of the strip between the adjacent stands in real time; if the instantaneous tensile stress is greater than or equal to a preset tensile stress threshold or the looper forming time is greater than or equal to a first preset time threshold, then setting the current time as the time corresponding to the start point of the first control cycle, and setting the time corresponding to the end point of the first control cycle as the time corresponding to the start point of the second control cycle.

[0042] Specifically, in this application, the speed control of the hot strip finishing system requires a bite signal to trigger. The generation of the bite signal is related to the looper forming time of adjacent stands and the instantaneous tensile stress of the strip between adjacent stands. Therefore, the first control cycle in the hot strip finishing system control process essentially serves as an initialization function and does not adjust the speed of the stands.

[0043] For example, the preset tensile stress threshold is T. S The first preset time threshold is 0.2s, and the looper forming time of adjacent frames is t. i The instantaneous tensile stress is T i (t i When T i (t i )≥T S Or t i When the stress is ≥0.2, a bite signal is generated, and the hot strip finishing system initiates the control process for controlling the rolling speed of the stand. Simultaneously, the current time is used as the start point of the first control cycle, and the end point of the first control cycle is used as the start point of the second control cycle. The preset tensile stress threshold can be set to 8MPa–12MPa. Furthermore, the duration of each control cycle is the same, and the control cycle duration can be 0.15s–0.25s. For example, if the control cycle duration is 0.25s, then the first control cycle duration is 0s–0.25s, and the second control cycle duration is 0.25s–0.50s.

[0044] Continue to refer to Figure 1 In step 130, if the conventional control signal for the looper between the adjacent stands is triggered, the speed adjustment amount of the first stand in the rolling direction among the adjacent stands is calculated based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, and the rolling speed of the first stand is adjusted based on the speed adjustment amount.

[0045] In this application, if the conventional control signal of the looper between adjacent stands is triggered, the speed adjustment amount of the first stand in the rolling direction in the adjacent stands is calculated based on the current tensile stress, current strip length, initial tensile stress, and initial strip length, and the rolling speed of the first stand is adjusted based on the speed adjustment amount.

[0046] For example, if the regular control signal of the looper between adjacent racks is triggered, and the current signal period is the third signal period in the second control period, then the current tensile stress, current strip length, initial tensile stress, and initial strip length are T(τ2), L(τ2), and T(τ2), respectively. 20 ), and L(τ) 20 ). Where, τ2=τ 20 +3τ p , τ p τ is the signal period. 20 τ1 represents the time corresponding to the start point of the current control cycle, and τ2 represents the time corresponding to the current signal cycle. Based on the obtained current tensile stress, current strip length, initial tensile stress, and initial strip length, and combined with the speed adjustment calculation formula, the speed adjustment of the first stand in the rolling direction among adjacent stands can be calculated, as well as the rolling speed of the first stand adjusted based on the speed adjustment.

[0047] It should be noted that after the conventional control signal of the looper between adjacent stands is triggered, the control process of the hot strip finishing system will end, and the hot strip finishing system will be switched from the looper stage to the conventional control stage.

[0048] Furthermore, in one embodiment of this application, the speed adjustment amount of the first stand in the rolling direction among the adjacent stands can be calculated using the following formula:

[0049]

[0050] Where, ΔV i τ represents the speed adjustment amount of the first stand in the rolling direction among the adjacent stands; i τ represents the time corresponding to the current signal period; i0 T(τ) represents the time corresponding to the start point of the current control cycle; i ) represents the current tensile stress; T i0 L(τ) represents the initial tensile stress; i ) indicates the current strip length; L i0 Indicates the initial strip length; E i L represents the elastic modulus of the strip between the adjacent frames; i This indicates the distance between adjacent racks.

[0051] Additionally, refer toFigure 2 The diagram shows the arrangement of the rolling mill stands in an embodiment of this application. During strip rolling, the strip passes through multiple stands sequentially in the rolling direction, forming loops between adjacent stands. Figure 2 In the hot strip finishing system, there are 7 stands. Taking the first stand and the second stand as examples, the first stand is the first stand in the rolling direction among the adjacent stands. Therefore, it is necessary to calculate the speed adjustment amount corresponding to the first stand and adjust the rolling speed of the first stand based on the speed adjustment amount.

[0052] In one embodiment of this application, the hot strip finishing system control method may further include steps 131 to 132:

[0053] Step 131: If the regular control signal of the loop between the adjacent racks is not triggered, determine whether the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to the second preset time threshold.

[0054] Step 132: If the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to the second preset time threshold, then based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, calculate the speed adjustment amount of the first stand in the rolling direction among the adjacent stands, and adjust the rolling speed of the first stand based on the speed adjustment amount.

[0055] In this application, after obtaining the current tensile stress, current strip length, initial tensile stress, and initial strip length, if the conventional control signal for the looper between adjacent stands is not triggered, it indicates that the hot strip finishing system is still in the looper initiation stage. Therefore, when the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to the second preset time threshold, the speed adjustment amount of the first stand in the rolling direction among the adjacent stands is calculated based on the obtained current tensile stress, current strip length, initial tensile stress, and initial strip length, and the rolling speed of the first stand is adjusted based on the speed adjustment amount.

[0056] Furthermore, after adjusting the rolling speed of the first stand based on the speed adjustment amount, the time corresponding to the current signal cycle is determined as the time corresponding to the start point of the next control cycle, and the hot strip finishing system is controlled to enter the next signal cycle, so as to return to the execution of the step of obtaining the tensile stress and length of the strip between adjacent stands in the current signal cycle.

[0057] For example, if the current signal cycle is the second signal cycle in the third control cycle, then the time corresponding to the second signal cycle in the third control cycle is taken as the starting point of the fourth control cycle. Simultaneously, the hot strip finishing system enters the fourth control cycle and waits for the signal cycle to enter the first signal cycle in the fourth control cycle, thus returning to the step of obtaining the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle.

[0058] It should be noted that, since the control process of the hot strip finishing system in this application is during the strip initiation stage, it is necessary to record and judge the looper formation time of adjacent stands in real time. Based on this, before obtaining the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle, the method further includes: in response to the formation of the looper between the adjacent stands, recording the looper formation time of the adjacent stands; if the looper formation time is greater than or equal to a third preset time threshold, then ending the hot strip finishing system control process and controlling the hot strip finishing system to switch from the initiation stage to the conventional control stage.

[0059] In addition, before ending the hot strip finishing system control process, the speed adjustment amount of the first stand in the rolling direction in the adjacent stands is calculated based on the current tensile stress, current strip length, initial tensile stress, and initial strip length, and the rolling speed of the first stand is adjusted based on the speed adjustment amount.

[0060] In one embodiment of this application, when the conventional control signal for the looper between the adjacent stands is not triggered, the hot strip finishing system control method may further include step 133:

[0061] Step 133: If the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is less than the second preset time threshold, then control the hot continuous rolling finishing system to enter the next signal cycle, so as to return to the step of obtaining the tensile stress and length of the strip between adjacent stands in the current signal cycle.

[0062] In this application, the hot strip finishing system adjusts the stand speed in control cycles. For example, the current control cycle is the second control cycle, and the current signal cycle is the first signal cycle within the second control cycle. If the difference between the time corresponding to the first signal cycle within the second control cycle and the time corresponding to the start point of the second control cycle is less than a second preset time threshold, the hot strip finishing system is controlled to enter the second signal cycle within the second control cycle to return to the step of obtaining the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle.

[0063] In summary, the hot strip finishing system control method provided by this invention may specifically include the following steps during execution:

[0064] The first step is to determine the moment when a loop is formed between adjacent racks as the starting point of the first control cycle, and then obtain the loop duration (i.e., t). i When T i (t i )≥T S or t i Let τ ≥ 0.2, where any one of the conditions is true. i0 =τ i L i0 =L(τ) i ),T i0 =T(τ) i ).

[0065] Wherein, T(τ) i ) is τ i Time F i With F i+1 The tensile stress of the strip between the frames, L(τ) i ) is τ i Time F i With F i+1 The length of the strip between frames. (T) S The preset tensile stress threshold can range from 8 MPa to 12 MPa. i For F i With F i+1 The duration after the inter-rack loop is formed. τ i This represents the time corresponding to the current signal cycle.

[0066] τ i0 This refers to the time corresponding to the start point of the current control cycle. F i F is the first stand in the rolling direction among adjacent stands. i+1 The second stand in the rolling direction among adjacent stands.

[0067] The second step is to proceed to the fourth step when the regular control signal of the loop between adjacent racks is triggered; otherwise, proceed to the third step.

[0068] Third step, when τ i ≥τ i0 +τ S If it is true, proceed to step four; otherwise, proceed to step five, where τ S This represents the time corresponding to one control cycle, and its value can range from 0.15s to 0.25s.

[0069] The fourth step is to calculate the speed adjustment amount of the first stand in the rolling direction among adjacent stands using the speed adjustment formula. Simultaneously, let τ... i0 =τ i L i0 =L(τ) i ),T i0 =T(τ) i Then proceed to step five. The formula for the speed adjustment is as follows:

[0070]

[0071] Fifth, when the conventional control signal for the looper between adjacent stands is triggered, the cycle ends, and the hot strip finishing system switches from the looper activation stage to the conventional control stage. Otherwise, it waits for the next signal cycle and repeats the cycle from steps two to five.

[0072] The beneficial effects of this application will be described below with specific embodiments.

[0073] Reference Figure 3 The diagram illustrates the control effect of the hot strip finishing system in an embodiment of this application. In the diagram, the third and fourth stands are designated as adjacent stands, and T... S Set to 12MPa, τ S Set to 0.2s, τ P Set to 0.05s, distance between the third and fourth racks set to 5500mm, E i The target pressure is 60,000 MPa, the thickness of the strip between frames is 11.5 mm, the target tension of the strip between frames is 15 MPa, and the target looper angle is 22°. According to... Figure 3 As shown, after adopting the technology of the present invention, the looper angle does not fluctuate significantly after reaching the target and the maximum tensile stress of the strip is below 20MPa, and the stability of the looper is significantly improved.

[0074] Reference Figure 4 The diagram illustrates the control effect of another hot strip finishing system in an embodiment of this application. In the diagram, the third and fourth stands are designated as adjacent stands, and T... S Set to 10MPa, τ S Set to 0.2s, τ P Set to 0.05s, distance between the sixth and seventh racks set to 5500mm, E i The target pressure is 60,000 MPa, the thickness of the strip between frames is 2.3 mm, the target tension of the strip between frames is 14 MPa, and the target angle of the looper is 20°. According to... Figure 4 As shown, after adopting the technology of the present invention, the loop angle does not fail to reach the target value for a long time, and the tensile stress and tension do not show abnormal increases, and the stability of the loop is significantly improved.

[0075] Based on the same inventive concept, this application also provides a control device for a hot continuous rolling finishing system, referring to... Figure 5 This document illustrates a schematic diagram of the control device for a hot strip finishing system in an embodiment of this application. The hot strip finishing system control device 500 includes: an acquisition unit 501, configured to acquire the tensile stress and length of the strip between adjacent stands corresponding to the current signal cycle, respectively, as the current tensile stress and current strip length; and to acquire the tensile stress and length of the strip between adjacent stands corresponding to the starting point of the current control cycle, respectively, as the starting tensile stress and starting strip length. The current control cycle is any one of the second to last control cycles in the hot strip finishing system control process, and includes multiple signal cycles within one control cycle; and a first execution unit 502, configured to, if the conventional control signal for the looper between adjacent stands is triggered, execute the following based on the current tensile stress, the current strip length, the starting tensile stress, and the starting strip length. The second execution unit 503 is configured to: calculate the speed adjustment amount of the first stand in the rolling direction among the adjacent stands, and adjust the rolling speed of the first stand based on the speed adjustment amount; if the regular control signal of the loop between the adjacent stands is not triggered, and the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to a second preset time threshold, then calculate the speed adjustment amount of the first stand in the rolling direction among the adjacent stands based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, adjust the rolling speed of the first stand based on the speed adjustment amount, and determine the time corresponding to the current signal cycle as the time corresponding to the start point of the next control cycle.

[0076] For details not disclosed in the device embodiments of this application, please refer to the embodiments of the methods described above in this application.

[0077] Based on the same inventive concept, this application can also provide a computer-readable storage medium, characterized in that the computer-readable storage medium stores at least one piece of program code, the at least one piece of program code being loaded and executed by a processor to implement the operation performed by the method.

[0078] Based on the same inventive concept, this application also provides an electronic device, referring to... Figure 6 , Figure 6 A schematic diagram of the structure of an electronic device according to an embodiment of this application is shown.

[0079] The electronic device includes one or more memories 604, one or more processors 602, and at least one computer program (program code) stored in the memory 604 and executable on the processor 602, wherein the processor 602 executes the computer program to implement the method described above.

[0080] Among them, Figure 6 In this document, a bus architecture (represented by bus 600) is used. Bus 600 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 602 and memory represented by memory 604. Bus 600 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 605 provides an interface between bus 600 and receiver 601 and transmitter 603. Receiver 601 and transmitter 603 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 602 is responsible for managing bus 600 and general processing, while memory 604 can be used to store data used by processor 602 during operation.

[0081] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may 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 application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0082] 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.

[0083] 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.

[0084] 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 described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0085] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A control method for a hot continuous rolling finishing system, characterized in that, The hot strip finishing system includes multiple stands, and the method includes: The tensile stress and length of the strip between adjacent stands in the current signal cycle are obtained, and are respectively used as the current tensile stress and the current strip length. The tensile stress and length of the strip between adjacent stands at the start point of the current control cycle are also obtained, and are respectively used as the starting tensile stress and the starting strip length. The current control cycle is any one of the second to the last control cycle in the hot strip finishing system control process, and includes multiple signal cycles in one control cycle. In response to the formation of a loop between adjacent frames, the loop forming time of the adjacent frames is recorded, and the instantaneous tensile stress of the strip between the adjacent frames is monitored in real time. If the instantaneous tensile stress is greater than or equal to a preset tensile stress threshold or the looper forming time is greater than or equal to a first preset time threshold, then the current time is set as the time corresponding to the start point of the first control cycle, and the time corresponding to the end point of the first control cycle is set as the time corresponding to the start point of the second control cycle. If the regular control signal of the looper between the adjacent stands is triggered, the speed adjustment amount of the first stand in the rolling direction of the adjacent stands is calculated based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, and the rolling speed of the first stand is adjusted based on the speed adjustment amount.

2. The method according to claim 1, characterized in that, The method further includes: If the regular control signal of the loop between the adjacent racks is not triggered, then determine whether the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to the second preset time threshold. If the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is greater than or equal to the second preset time threshold, then based on the current tensile stress, the current strip length, the initial tensile stress, and the initial strip length, the speed adjustment amount of the first stand in the rolling direction among the adjacent stands is calculated, and the rolling speed of the first stand is adjusted based on the speed adjustment amount.

3. The method according to claim 2, characterized in that, After adjusting the rolling speed of the first stand based on the speed adjustment amount, the method further includes: The time corresponding to the current signal cycle is determined as the time corresponding to the start point of the next control cycle, and the hot strip mill finishing system is controlled to enter the next signal cycle, so as to return to the execution of the step of obtaining the tensile stress and length of the strip between adjacent stands in the current signal cycle.

4. The method according to claim 2, characterized in that, The method further includes: If the difference between the time corresponding to the current signal cycle and the time corresponding to the start point of the current control cycle is less than the second preset time threshold, the hot continuous rolling finishing system is controlled to enter the next signal cycle to return to the step of obtaining the tensile stress and length of the strip between adjacent stands in the current signal cycle.

5. The method according to any one of claims 1 to 4, characterized in that, The speed adjustment of the first stand in the rolling direction among the adjacent stands is calculated using the following formula: in, This indicates the speed adjustment amount of the first stand in the rolling direction among adjacent stands; This indicates the time corresponding to the current signal cycle; This indicates the time corresponding to the start point of the current control cycle; Indicates the current tensile stress; Indicates the initial tensile stress; Indicates the current strip length; Indicates the initial strip length; This indicates the elastic modulus of the strip between adjacent frames; This indicates the distance between adjacent racks.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to perform the operations performed by the method as described in any one of claims 1 to 5.

7. An electronic device, characterized in that, The electronic device includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation performed by the method as described in any one of claims 1 to 5.

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