A control method, system and control device for strip steel production

Abstract

The present application is applicable to the technical field of strip steel production lines, and provides a control method, system and control equipment for strip steel production, wherein the method includes determining the over-width portion of the strip steel, the strip steel is obtained by rolling a rolled piece, and the predicted width of the over-width portion is greater than the preset width; determining the first position corresponding to the over-width portion when the rolled piece passes through the roughing roll, and the second position corresponding to the over-width portion when the rolled piece passes through the finishing roll; controlling the roughing roll to increase the pressure on the first position, and controlling the finishing roll to increase the pressure on the second position. The present application can eliminate the situation where the strip steel width exceeds the standard, provide qualified strip steel for the next process, and has high economic value.

Description

Technical Field

[0001] The present application belongs to the technical field of strip steel production lines, and in particular, relates to a control method, system and control equipment for strip steel production. Background Art

[0002] During the production process of hot-rolled strip steel, the tail of the strip steel is often too wide. If the next process directly rolls the extra-wide strip steel, it will affect the subsequent loading and uncoiling. If the extra-wide strip steel is used directly, it will also affect the comprehensive yield rate of other processes. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a control method, system and control device for strip steel production to solve the existing problem of excessive strip steel width.

[0004] In a first aspect, an embodiment of the present application provides a method for controlling strip steel production, the method comprising:

[0005] Determining an extra-wide portion of a steel strip, the steel strip being obtained by rolling a rolled piece, the predicted width of the extra-wide portion being greater than a preset width;

[0006] Determine a first position corresponding to the extra-wide portion when the rolled piece passes through the roughing vertical rollers, and a second position corresponding to the extra-wide portion when the rolled piece passes through the finishing vertical rollers;

[0007] The roughing roll is controlled to increase the pressure on the first position, and the finishing roll is controlled to increase the pressure on the second position.

[0008] The control method provided in the embodiment of the present application first determines the over-wide portion of the steel strip, then determines a first position corresponding to the over-wide portion when the rolled piece passes through the roughing vertical rollers, and a second position corresponding to the over-wide portion when the rolled piece passes through the finishing vertical rollers, and then controls the roughing vertical rollers to increase the pressure on the first position, and controls the finishing vertical rollers to increase the pressure on the second position, so that the roughing vertical rollers and the finishing vertical rollers can accurately apply pressure to the over-wide portion, eliminate the situation where the steel strip is over-wide, and provide qualified steel coils for the next process.

[0009] In a second aspect, an embodiment of the present application provides a control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method of the first aspect described above when executing the computer program.

[0010] In a third aspect, an embodiment of the present application provides a system for strip steel production, including: roughing vertical rolls, finishing vertical rolls, and a control device as described in the second aspect above.

[0011] In a fourth aspect, an embodiment of the present application provides a control device for strip steel production, comprising:

[0012] A first determination module is used to determine an extra-wide portion of a steel strip, the steel strip being obtained by rolling a rolled piece, the predicted width of the extra-wide portion being greater than a preset width;

[0013] A second determination module is used to determine a first position corresponding to the extra-wide portion when the rolled piece passes through the roughing vertical rollers, and a second position corresponding to the extra-wide portion when the rolled piece passes through the finishing vertical rollers;

[0014] The control module is used to control the roughing vertical roller to increase the pressure on the first position, and to control the finishing vertical roller to increase the pressure on the second position.

[0015] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method of the first aspect described above are implemented.

[0016] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1 This is a process flow chart of strip steel production provided by an embodiment of the present application;

[0019] Figure 2 It is a flow chart of a control method provided by an embodiment of the present application;

[0020] Figure 3 is a flow chart of step S330 of the control method provided in one embodiment of the present application;

[0021] Figure 4 is a flow chart of step S400 of the control method provided in one embodiment of the present application;

[0022] Figure 5 is a structural schematic diagram of a control device provided in one embodiment of the present application;

[0023] Figure 6 It is a schematic diagram of a control device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0024] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0025] In the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0026] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0027] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0028] The control method for strip steel production provided in the embodiment of the present application is applied to a strip steel production system, and the strip steel production system at least includes: roughing rolls, finishing rolls and control equipment. It is understandable that the control equipment can be a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc. The embodiment of the present application does not impose any restrictions on the specific type of terminal equipment.

[0029] The number of roughing rolls and finishing rolls is determined according to the specifications of the strip and the actual production requirements. The strip production system may also include a heating furnace, testing equipment, coiling equipment, etc.

[0030] For example, see Figure 1 , Figure 1The present invention is a process flow chart for strip steel production, wherein the rolled piece passes through a heating furnace, a rough dephosphorization machine, a fixed width press, two rough rolling mills each including rough rolling vertical rollers, a hot coil box, a cutting machine (for cutting off the head and tail of the rolled piece), a fine dephosphorization machine, seven finishing mills each including finishing vertical rollers, a multifunctional instrument, an ultra-fast cooling device (UltraFastCooling, UFC) equipment, a layer cooling roller table and a coiler, wherein the rough dephosphorization machine can remove the oxide scale on the surface of the steel billet; the specific number of the rough rolling mill and the finishing rolling mill is only for example and can be adjusted according to the specific application scenario, and is not limited here.

[0031] It should be noted that the above flow chart is only for illustrative purposes, and the actual process of producing strip steel may include more equipment than that shown in the figure.

[0032] In one possible implementation, in order to eliminate the influence of excessive width at the tail of the strip, the radius of the roughing roll is greater than the first theoretical value, and the radius of the finishing roll is greater than the second theoretical value. Both the first theoretical value and the second theoretical value are determined based on the width requirement of the strip and the size of the rolled piece.

[0033] Specifically, in the production process of roughing vertical rolls and finishing vertical rolls, the radius of the roughing vertical rolls and the radius of the finishing vertical rolls can be appropriately increased to increase the circumference of the roughing vertical rolls and the finishing vertical rolls, thereby increasing the arc length of the roughing vertical rolls and the finishing vertical rolls in contact with the workpiece and improving the dog-bone shape of the strip tail. The specific value of the increase in the radius of the roughing vertical rolls and the radius of the finishing vertical rolls can be any value between 5 mm and 10 mm.

[0034] See also Figure 2 , Figure 2 1 is a flow chart of the control method for strip steel production provided in the embodiment of the present application. The control method for strip steel production provided in the embodiment of the present application includes but is not limited to the following steps:

[0035] In S100, the extra-wide portion of the steel strip is determined.

[0036] For example, in a 1580 hot-rolled strip production line, after the billet enters the production line, it will be rolled into a rolled piece. In the subsequent production process, the rolled piece will continue to be rolled into a strip, and the strip will be rolled up to form a steel coil; since the deformation conditions of the tail of the strip are different from those of the other parts of the strip as a whole, there is great uncertainty, so the width of the tail of the strip is relatively large. In addition, due to the effect of the outer end of the rolled piece, the tail of the rolled piece is in a tension-free deformation process, and according to the minimum resistance theorem of metal flow in the principle of metal plastic deformation, that is, the temperature drop at the tail of the rolled piece is large, and the metal flows in the direction of minimum resistance, further increasing the width of the tail of the strip. In order to eliminate the situation of excessive width of the strip, the control device can first determine the excessive width of the strip, and the predicted width of the excessive width is greater than the preset width. Among them, the preset width is the width of the strip required for the next process, which can be preset. When the parameters before the process is adjusted are used to produce the strip, or the strip produced last time has an excessive width at a preset position, the preset position is the excessive width position, and the width of the excessive width position is the predicted width.

[0037] Illustratively, from 0.2 meters at the tail of the strip to 4 meters, if the width of the strip is greater than the preset width of 15 millimeters or more, the control device can determine that the strip is over-wide and this portion is an over-wide portion; wherein, due to different specifications of steel types, the specific over-width values ​​of the strip are different, so 0.2 meters, 4 meters and 15 millimeters are only used as reference examples without limitation, and the control device can adjust each value according to actual conditions.

[0038] In S200, a first position corresponding to the extra-wide portion of the rolled piece when passing through the roughing vertical rolls and a second position corresponding to the extra-wide portion of the rolled piece when passing through the finishing vertical rolls are determined.

[0039] Specifically, the control device can determine the first position corresponding to the extra-wide portion when the rolled piece passes through the roughing vertical roll, and can determine the second position corresponding to the extra-wide portion when the rolled piece passes through the finishing vertical roll, thereby determining the positional relationship of the extra-wide portion relative to the roughing vertical roll or the finishing vertical roll; for example, the control device can obtain the real-time speed of the rolled piece through a speed sensor, and then predict the second position based on the real-time speed.

[0040] In S300, the roughing rolls are controlled to increase the pressure on the first position, and the finishing rolls are controlled to increase the pressure on the second position.

[0041] Specifically, by controlling the roughing vertical rolls to increase the pressure on the first position, and controlling the finishing vertical rolls to increase the pressure on the second position, the rolled piece corresponding to the pre-overwidth portion can be pressurized to reduce the width of the rolled piece, that is, to offset the widening of the piece during the roughing process or the finishing process, and then obtain a strip of preset width subsequently.

[0042] In some possible implementations, the first pressure is determined according to the rolling pass corresponding to the roughing roll, and the second pressure is determined according to the rolling pass corresponding to the finishing roll; the roughing roll is controlled to increase the pressure on the first position according to the first pressure, and the finishing roll is controlled to increase the pressure on the second position according to the second pressure. That is, different pressures are used to pressurize the rolled piece in different rolling passes, so that the width of the super-wide part can be better adjusted to obtain qualified strip steel.

[0043] In some possible implementations, the number of rough rolling passes and the number of finish rolling passes are determined according to the specifications of the rolled piece, and the pressure corresponding to each rolling pass is determined according to the predicted width, the number of rough rolling passes, and the number of finish rolling passes.

[0044] Among them, the existing technology can be used to determine the number of rough rolling and finishing rolling required for the rolled piece according to the specifications of the rolled piece, so it will not be described in detail. The total pressure that needs to be increased in the over-width part can be determined based on the predicted width, the number of rough rolling and the number of finishing rolling. The total pressure is distributed to each rolling pass according to the preset distribution rules, and the pressure corresponding to each rolling pass can be obtained. In some possible implementations, the pressure of each rolling pass can be calculated based on the reduction rate, and the calculation formula of the reduction rate is: In the formula, δ represents the reduction rate, a+b represents the reduction of the previous pass and the next pass, and c represents the thickness of the rolled piece in the previous pass. By predicting the width, the number of rough rolling times, and the number of finishing rolling times to determine the pressure corresponding to each rolling pass, the pressure of each rolling pass obtained can be adapted to the actual production process, the accuracy of pressure distribution can be improved, and better strip steel can be obtained.

[0045] In some possible implementations, in order to further eliminate the situation where the strip is too wide, before step S300, the method further includes but is not limited to the following steps:

[0046] The temperature of the heating furnace used to heat the steel billet is adjusted so that the first heating temperature of the tail of the steel billet is greater than the second heating temperature of the area outside the tail of the steel billet, and the difference between the first heating temperature and the second heating temperature is a set difference.

[0047] Specifically, different steel types, different compositions and different specifications have different heating temperatures. The purpose of the heating furnace to heat the steel billet is to austenitize it, reduce deformation resistance and ensure stable production of the production line. The control device can intelligently adjust the temperature of the heating furnace so that the first heating temperature of the tail of the steel billet is greater than the second heating temperature of the area outside the tail of the steel billet, and the difference between the first heating temperature and the second heating temperature is the set difference. For example, when producing NM300 steel plates with a plate width greater than or equal to 1500 mm, the control device can adjust the temperature of the soaking section of the heating furnace. When the temperature of the soaking section of the heating furnace is any value between 1210℃ and 1240℃ and the width of NM300 steel plate is less than or equal to 1500 mm, the control device can adjust the temperature of the soaking section of the heating furnace to any value between 1210℃ and 1230℃, and then increase the temperature of the tail of the billet on this basis. For example, the set difference can be preset to 20℃ or 40℃. 20℃ and 40℃ are only examples of 1580 mm strip steel production line and are not limited to them. In actual applications, the specific set difference can take any value between 20℃ and 40℃.

[0048] For some possible implementations, see Figure 3 In order to meet more practical needs, the method also includes but is not limited to the following steps:

[0049] S330, obtaining the actual width of the steel strip.

[0050] Specifically, after one or more improvements such as increasing the radius of the roughing roll, increasing the radius of the finishing roll, increasing the pressure at the first position, increasing the pressure at the second position, adjusting the temperature of the heating furnace, etc., the control device can obtain the actual width of the strip obtained after rolling.

[0051] S340, adjusting the temperature of the heating furnace according to the actual width.

[0052] For example, the control device can pre-bind the preset local temperature of the strip with the preset rolling force; for example, in a strip with the steel grade of Q355B, the specification of 1200×3.00×1, and the thickness of the steel billet of 2300 mm, the control device can calculate the extra-wide value based on the actual width minus the target width, and then determine the corresponding reduction rate based on the extra-wide value; when the reduction rate is 16.7%, the control device can adjust the temperature of the extra-wide part of the strip to 958°C and the rolling force of the rough rolling vertical roll to 3120kN ... When the reduction rate is 17.8%, the control equipment can adjust the temperature of the extra-wide part of the strip to 961°C, and the rolling force of the rough rolling vertical roll to 3089kN; when the reduction rate is 19.5%, the control equipment can adjust the temperature of the extra-wide part of the strip to 955°C, and the rolling force of the rough rolling vertical roll to 3240kN; when the reduction rate is 21.6%, the control equipment can adjust the temperature of the extra-wide part of the strip to 983°C, and the rolling force of the rough rolling vertical roll to 3208kN, so as to better eliminate the extra-wide situation of the strip.

[0053] In some possible implementations, after adjusting the temperature of the heating furnace according to the actual position, the control device can again determine whether there is an over-width situation at the tail of the strip; if there is no over-width situation at the tail of the strip, the control device can bind the initial over-width value, the current temperature value and the rolling force value into a set of preset parameters and save them in the memory. In the subsequent rolling process, when the over-width value of the over-width part of the strip is consistent with the initial over-width value or the difference is within the preset range, the control device can use the preset parameter as the initial value, so that the production line can achieve autonomous learning and autonomous optimization. If there is still an over-width situation at the tail of the strip, it can be preliminarily determined that the abnormal data is generated due to equipment damage, which is convenient for operators to make preliminary judgments on the operation of the strip production line.

[0054] In some possible implementations, the control device may also adjust the first pressure and the second pressure according to the actual width of the steel strip, that is, perform feedback adjustment on the first pressure and the second pressure according to actual production conditions to ensure that the steel strip is not over-wide.

[0055] For some possible implementations, see Figure 4 In order to improve the safety of production, the method also includes but is not limited to the following steps:

[0056] S400: If the actual width is greater than a preset threshold, an alarm message is generated.

[0057] Specifically, if the actual width of the strip is greater than a preset threshold, the control device can generate an alarm message, so that the operator can promptly know that the tail of the strip is too wide; in some other possible implementation methods, when other process parameters on the production line exceed the standard value, the control device can also generate an alarm message.

[0058] S410, sending alarm information to an alarm device.

[0059] Specifically, the control device can send an alarm message to the alarm device, and the alarm device can sound an alarm after receiving the alarm message, such as activating a buzzer or giving a prompt on the control panel, thereby improving production safety.

[0060] The implementation principle of a control method for strip steel production in an embodiment of the present application is as follows: the control device can first determine the over-width portion of the strip steel, and then determine the position corresponding to the over-width portion when the rolled piece passes through the rough rolling vertical rollers and the position corresponding to the over-width portion when the rolled piece passes through the finishing vertical rollers. When the over-width portion reaches this position, the rough rolling vertical rollers and the finishing vertical rollers actively apply pressure to the over-width portion, thereby pressurizing the rolled piece in advance, reducing the over-width of the strip steel, and eliminating the adverse effects caused by the over-width. At the same time, the corresponding parameters can be saved for reference or direct use in subsequent rolling processes, thereby achieving self-learning and self-optimization.

[0061] It should be noted that the size of the serial numbers of the steps in the above embodiments does not mean 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 application.

[0062] The embodiment of the present application also provides a control device for strip steel production. For ease of description, only the parts related to the present application are shown. The control device is applied to control equipment, such as Figure 5 As shown, the device 500 includes:

[0063] The first determination module 510 is used to determine an extra-wide portion of a steel strip, the steel strip being obtained by rolling a rolled piece, and the predicted width of the extra-wide portion being greater than a preset width.

[0064] The second determination module 520 is used to determine the first position corresponding to the extra-wide portion when the rolled piece passes through the roughing vertical rollers, and the second position corresponding to the extra-wide portion when the rolled piece passes through the finishing vertical rollers.

[0065] The control module 530 is used to control the roughing vertical roller to increase the pressure on the first position, and control the finishing vertical roller to increase the pressure on the second position.

[0066] Optionally, the control module 530 includes but is not limited to:

[0067] The first determination submodule is used to determine the first pressure according to the rolling passes corresponding to the roughing vertical rolls, and to determine the second pressure according to the rolling passes corresponding to the finishing vertical rolls.

[0068] The second determination submodule is used to control the roughing vertical rollers to increase the pressure on the first position according to the first pressure, and to control the finishing vertical rollers to increase the pressure on the second position according to the second pressure.

[0069] Optionally, the device 500 also includes but is not limited to:

[0070] The third determination module is used to determine the number of rough rolling times and the number of finish rolling times according to the specifications of the rolled piece.

[0071] The fourth determination module is used to determine the pressure corresponding to each rolling pass according to the predicted width, the number of rough rolling times and the number of finishing rolling times. Optionally, the device 500 also includes but is not limited to:

[0072] The adjustment module is used to adjust the first pressure and the second pressure according to the actual width of the strip.

[0073] Optionally, the device 500 also includes but is not limited to:

[0074] The heating module is used to adjust the temperature of the heating furnace used to heat the steel billet so that the first heating temperature of the tail of the steel billet is greater than the second heating temperature of the area outside the tail of the steel billet, and the difference between the first heating temperature and the second heating temperature is a set difference.

[0075] Optionally, the device 500 also includes but is not limited to:

[0076] The acquisition module is used to adjust the temperature of the heating furnace according to the actual width of the strip.

[0077] Optionally, the device 500 also includes but is not limited to:

[0078] The first alarm module is used to generate an alarm message if the actual width is greater than a preset threshold.

[0079] The second alarm module is used to send alarm information to the alarm device.

[0080] It should be noted that the information interaction, execution process and other contents between the above-mentioned modules are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0081] The present application also provides a control device, such as Figure 6As shown, the control device 600 of this embodiment includes: a processor 601, a memory 602, and a computer program 602 stored in the memory 602 and executable on the processor 601. When the processor 601 executes the computer program 602, the steps in the above-mentioned traffic processing method embodiment are implemented, for example Figure 1 Steps S100 to S300 shown; or, when the processor 601 executes the computer program 602, the functions of each module in the above device are realized, for example Figure 5 Functions of modules 501 to 503 are shown.

[0082] The control device 600 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server, and the control device 600 includes but is not limited to a processor 601 and a memory 602. Those skilled in the art will appreciate that Figure 6 It is only an example of the control device 600 and does not constitute a limitation of the control device 600. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the control device 600 may also include input and output devices, network access devices, buses, etc.

[0083] Among them, the processor 601 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.; the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0084] The memory 602 may be an internal storage unit of the control device 600, such as a hard disk or memory of the control device 600, or an external storage device of the control device 600, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the control device 600; further, the memory 602 may include both an internal storage unit and an external storage device of the control device 600, and the memory 602 may also store a computer program 602 and other programs and data required by the control device 600, and the memory 602 may also be used to temporarily store data that has been output or is to be output.

[0085] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the methods, principles, and structures of the present application should be included in the protection scope of the present application.

Claims

1. A control method for strip steel production, characterized in that: include: Determining an extra-wide portion of a steel strip, the steel strip being obtained by rolling a rolled piece, the predicted width of the extra-wide portion being greater than a preset width; Determine a first position corresponding to the extra-wide portion when the rolled piece passes through the roughing vertical rollers, and a second position corresponding to the extra-wide portion when the rolled piece passes through the finishing vertical rollers; Controlling the roughing vertical roller to increase the pressure on the first position, and controlling the finishing vertical roller to increase the pressure on the second position; The controlling the roughing vertical roller to increase the pressure on the first position, and the controlling the finishing vertical roller to increase the pressure on the second position, comprises: Determine the first pressure according to the rolling pass corresponding to the roughing vertical roll, and determine the second pressure according to the rolling pass corresponding to the finishing vertical roll; Control the roughing vertical roller to increase the pressure on the first position according to the first pressure, and control the finishing vertical roller to increase the pressure on the second position according to the second pressure; Before determining the first pressure according to the rolling passes corresponding to the roughing vertical rolls and determining the second pressure according to the rolling passes corresponding to the finishing vertical rolls, the method further includes: Determine the number of rough rolling and the number of finish rolling according to the specifications of the rolled piece; The pressure corresponding to each rolling pass is determined according to the predicted width, the number of rough rolling times, and the number of finishing rolling times; the pressure of each rolling pass is calculated according to the reduction rate, and the calculation formula of the reduction rate is δ=(𝑎+b) / 𝑐×100%, where, It represents the sum of the reduction of the previous pass and the next pass, and c represents the thickness of the rolled piece in the previous pass; The rolled product is obtained by rolling a steel billet. Before controlling the roughing vertical roll to increase the pressure on the first position and controlling the finishing vertical roll to increase the pressure on the second position, the method further includes: The temperature of the heating furnace used to heat the steel billet is adjusted so that the first heating temperature of the tail of the steel billet is greater than the second heating temperature of the area outside the tail of the steel billet, and the difference between the first heating temperature and the second heating temperature is a set difference.

2. The method according to claim 1, characterized in that After controlling the roughing vertical roller to increase the pressure on the first position according to the first pressure and controlling the finishing vertical roller to increase the pressure on the second position according to the second pressure, the method further includes: The first pressure and the second pressure are adjusted according to the actual width of the steel strip.

3. The method according to claim 1, characterized in that The method further comprises: The temperature of the heating furnace is adjusted according to the actual width of the steel strip.

4. The method according to claim 3, characterized in that The method further comprises: If the actual width is greater than a preset threshold, an alarm message is generated; The alarm information is sent to an alarm device.

5. A control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

6. A system for producing strip steel, characterized in that: include: A roughing vertical roll, a finishing vertical roll and a control device as claimed in claim 5.

7. The system according to claim 6, characterized in that The radius of the roughing vertical roll is greater than a first theoretical value, and the radius of the finishing vertical roll is greater than a second theoretical value. The first theoretical value and the second theoretical value are both determined according to the width requirement of the strip and the size of the rolled piece.

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