A method, device, equipment and medium for improving the dimensional accuracy of hot-rolled steel strip

Abstract

The present application relates to the technical field of hot rolling, and discloses a method, device, equipment and medium for improving the dimensional accuracy of hot rolled strip. The method comprises: obtaining the speed of the strip and the current position of the strip head, integrating the position of the strip head by speed integral; calculating and obtaining the position of the strip head in real time, and when the position of the strip head reaches the exit position of the pinch roller, increasing the compensation amount of the finishing mill and the compensation amount of the pinch roller, so that the strip length between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill; after the coiler is loaded, the compensation amount of the pinch roller is controlled to be reset to zero; after the finishing mill is completely cast, the compensation amount of the finishing mill is reset to zero. The present application increases the compensation amount of the finishing mill and the compensation amount of the pinch roller, thereby reducing the fluctuation of the strip width and thickness caused by the coiler loading and the finishing mill establishing tension, so as to improve the dimensional accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of hot rolling, and in particular, to a method, device, equipment and medium for improving the dimensional accuracy of hot-rolled steel strip. Background Art

[0002] In the hot rolling production process, there are multiple evaluation indicators for hot rolled strip products, including dimensional accuracy and quality accuracy, among which the width and thickness control accuracy in dimensional accuracy is crucial. In conventional production, when the coiler is loaded, it is necessary to establish tension between the coiler drum and the finishing mill, and the sudden increase in tension will affect the width and thickness of the strip, causing the thickness to be thinned by more than 30μm and the width to be narrowed by more than 20mm. In severe cases, it will cause quality blockage, which requires cutting to form a large amount of quality loss. Summary of the invention

[0003] The purpose of the present application is to provide a method, device, equipment and medium for improving the dimensional accuracy of hot-rolled strip, thereby reducing the strip width and thickness fluctuations caused by the coiler loading and the finishing mill establishing tension, so as to improve the dimensional accuracy.

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

[0005] According to one aspect of an embodiment of the present application, a method for improving the dimensional accuracy of hot-rolled steel strip is provided, and the method for improving the dimensional accuracy of hot-rolled steel strip comprises: obtaining the speed of the steel strip and the current position of the head of the steel strip, integrating the position of the head of the steel strip by speed integral; obtaining the position of the head of the steel strip by real-time calculation, and when the position of the head of the steel strip reaches the exit position of the pinch roller, increasing the compensation amount of the finishing mill and the compensation amount of the pinch roller, so that the length of the steel strip between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill; after the coiler is loaded, the compensation amount of the pinch roller is controlled to be reset to zero; after the finishing mill is completely cast, the compensation amount of the finishing mill is reset to zero

[0006] In some embodiments, the position of the strip head is obtained by real-time calculation, and when the position of the strip head reaches the exit position of the pinch roller of the coiler, the finishing mill compensation amount and the pinch roller compensation amount are increased. The method includes: when the strip head reaches the position 1m from the pinch roller exit, the finishing mill compensation amount and the pinch roller compensation amount are increased.

[0007] In some embodiments, the position of the strip head is obtained by real-time calculation, and when the position of the strip head reaches the pinch roller exit position, the finishing mill compensation amount and the pinch roller compensation amount are increased. The method includes: obtaining strip rolling information, and obtaining the thickness specification of the produced strip according to the strip rolling information; and increasing the corresponding finishing mill compensation amount and the pinch roller compensation amount according to the thickness specification and the relationship between the thickness specification and the thickness fluctuation amplitude.

[0008] In some embodiments, the finishing mill compensation amount includes a finishing mill roll gap compensation amount and a finishing mill roll gap compensation speed.

[0009] In some embodiments, when the thickness of the steel strip is less than or equal to 2.0 mm, the finishing mill roll gap compensation speed is 0.1 mm / s, and the finishing mill roll gap compensation amount is 0.08 mm; when the thickness of the steel strip is greater than 2.0 mm and less than or equal to 3.0 mm, the finishing mill roll gap compensation speed is 0.05 mm / s, and the finishing mill roll gap compensation amount is 0.05 mm; when the thickness of the steel strip is greater than 3 mm, the finishing mill roll gap compensation amount and the finishing mill roll gap compensation speed are both 0.

[0010] In some embodiments, the pinch roller compensation includes a pinch roller speed compensation.

[0011] In some embodiments, when the thickness of the steel strip is less than or equal to 2.0 mm, the pinch roller speed compensation amount is increased, and the compensation amount is the pinch roller speed lead rate + 2%; when the thickness of the steel strip is greater than 2.0 mm and less than or equal to 3.0 mm, the pinch roller speed compensation amount is increased, and the compensation amount is the pinch roller speed lead rate + 1%; when the thickness of the steel strip is greater than 3 mm, the pinch roller speed compensation amount is 0.

[0012] According to the second aspect of the embodiment of the present application, a device for improving the dimensional accuracy of hot-rolled strip is provided, and the device for improving the dimensional accuracy of hot-rolled strip comprises: a strip position calculation module, used to obtain the speed of the strip and the current position of the strip head, and integrate the position of the strip head by speed integral; a compensation control module, used to calculate and obtain the position of the strip head in real time, and when the position of the strip head reaches the exit position of the pinch roller, increase the compensation amount of the finishing mill and the pinch roller compensation amount, so that the strip length between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill; a coiler loading control module, used to control the pinch roller compensation amount to be reset to zero after the coiler is loaded; and a finishing mill control module, used to reset the finishing mill compensation amount to zero after the finishing mill is completely cast.

[0013] According to a third aspect of an embodiment of the present application, a computer-readable medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method for improving the dimensional accuracy of hot-rolled steel strip as described in the above embodiment is implemented.

[0014] According to the fourth aspect of the embodiments of the present application, an electronic device is provided, comprising: one or more processors; and a memory for storing executable instructions of the processors, wherein when the executable instructions are executed by the one or more processors, the one or more processors implement the method for improving the dimensional accuracy of hot-rolled strip as described in the above embodiments.

[0015] Compared with the prior art, the technical solution of the present application has the significant beneficial effect that, without adding any hardware, the method for improving the dimensional accuracy of the hot-rolled strip reduces the width and thickness fluctuations of the strip caused by the coiler loading and the finishing mill establishing tension by increasing the corresponding finishing mill compensation amount and the pinch roller compensation amount, so that the thickness is reduced to within 20μm and the width is narrowed to within 10mm when the coiler is loaded.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0018] Figure 1 A flowchart according to an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of a device for improving the dimensional accuracy of hot-rolled steel strip according to an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram of the structure of a computer system of an electronic device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0022] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0023] 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 may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0024] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0025] According to some embodiments, Figure 1 As shown, the present application provides a method for improving the dimensional accuracy of hot-rolled steel strip, and the method for improving the dimensional accuracy of hot-rolled steel strip comprises: step 101, obtaining the speed of the steel strip and the current position of the head of the steel strip, and integrating the position of the head of the steel strip by speed integral; step 102, obtaining the position of the head of the steel strip by real-time calculation, and when the position of the head of the steel strip reaches the exit position of the pinch roller, increasing the compensation amount of the finishing mill and the compensation amount of the pinch roller, so that the length of the steel strip between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill; step 103, after the coiler is loaded, the compensation amount of the pinch roller is controlled to be reset to zero; step 104, the compensation amount of the finishing mill is reset to zero after the finishing mill has completely cast steel.

[0026] Based on the above embodiments, in the method for improving the dimensional accuracy of hot-rolled strip of the present application, the devices used include: a finishing mill, pinch rollers and a coiler, wherein the pinch rollers are arranged between the finishing mill and the coiler, and after the finishing mill rolls the strip, the strip is transferred to the pinch rollers, the pinch rollers transfer the strip to the coiler, and the coiler completes the coiling of the strip.

[0027] Furthermore, in step 101, the conveying speed of the steel strip is firstly obtained and the current position of the head of the steel strip is detected, the position of the head of the steel strip is integrated by speed integration, and the actual position information of the head of the steel strip is calculated by the speed of the steel strip and the conveying time.

[0028] Furthermore, in step 102, the position of the strip head is calculated in real time according to the transmission time. When the position of the strip head reaches the exit position of the pinch roller, the compensation amount of the finishing mill and the pinch roller are increased so that the strip length between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill, so as to prevent the strip width and thickness fluctuations caused by removing the machine load and establishing tension of the finishing mill.

[0029] Furthermore, in step 103, after the coiler is loaded, the compensation amount of the pinch roller is controlled to be reset to zero, and the speeds of the finishing mill, the pinch roller and the coiler conveying the strip steel are all synchronized to prevent the steel from being pulled.

[0030] Furthermore, in step 104, after the finishing mill completely throws a roll of steel strip out of the finishing mill, the compensation amount of the finishing mill is reset to zero, and the roll gap can be rolled normally and the next roll of steel strip can be transmitted.

[0031] Its working principle is:

[0032] Increase the compensation amount of the finishing mill and the pinch roll compensation amount, so that the strip length between the pinch roll and the finishing mill exceeds the distance between the pinch roll and the finishing mill. When the coiler coils the strip, tension will be generated between the coiler and the finishing mill. By increasing the strip length between the pinch roll and the finishing mill, when tension is generated between the coiler and the finishing mill, the strip length between the pinch roll and the finishing mill can be shortened, thereby eliminating the phenomenon of steel drawing between the coiler and the finishing mill when the coiler is loaded, which makes the strip thinner.

[0033] Furthermore, the compensation amount of the finishing mill is increased by opening the roller gap of the finishing mill and appropriately controlling the speed of roller gap opening so as to increase the thickness of the strip. This can further prevent the coiler and the finishing mill from pulling the strip thin and reduce the impact on the strip size.

[0034] According to some embodiments, the position of the strip head is obtained by real-time calculation, and when the position of the strip head reaches the exit position of the pinch roller of the coiler, the finishing mill compensation amount and the pinch roller compensation amount are increased. The method includes: when the strip head reaches the position 1m from the pinch roller exit, the finishing mill compensation amount and the pinch roller compensation amount are increased.

[0035] Based on the above embodiment, before the coiler is loaded, it is necessary to increase the compensation amount of the finishing mill and the compensation amount of the pinch roller, so that the length of the strip between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill. When the coiler is loaded, the strip between the pinch roller and the finishing mill is flattened to eliminate the phenomenon of steel pulling when the coiler is loaded. Further, in the above embodiment, when the head of the strip reaches the position of 1m from the pinch roller outlet, the compensation amount of the finishing mill and the compensation amount of the pinch roller are increased. Among them, the length of 1m can be changed according to actual needs. In other embodiments, the compensation amount of the finishing mill and the compensation amount of the pinch roller are increased, not limited to the position of 1m when the head of the strip reaches the pinch roller outlet.

[0036] According to some embodiments, the position of the strip head is calculated in real time, and when the position of the strip head reaches the pinch roller exit position, the finishing mill compensation amount and the pinch roller compensation amount are increased. The method includes: obtaining strip rolling information, and obtaining the thickness specification of the produced strip according to the strip rolling information; and increasing the corresponding finishing mill compensation amount and the pinch roller compensation amount according to the thickness specification and the relationship between the thickness specification and the thickness fluctuation amplitude.

[0037] Based on the above embodiment, the specific values ​​of the finishing mill compensation amount and the pinch roll compensation amount are related to the thickness specification of the strip steel, and the relationship between the thickness specification and the thickness fluctuation range. The finishing mill compensation amount and the pinch roll compensation amount that need to be increased for the strip steel are calculated according to the thickness specifications of different strip steels, and the relationship between the thickness specifications and the thickness fluctuation range.

[0038] According to some embodiments, the finishing mill compensation amount includes a finishing mill roll gap compensation amount and a finishing mill roll gap compensation speed.

[0039] Based on the above embodiment, before the coiler is loaded, the roller gap of the finishing mill is opened, the size of the roller gap is controlled according to the roller gap compensation amount of the finishing mill, and the speed of the roller gap opening is controlled according to the roller gap compensation speed of the finishing mill, so as to increase the thickness of the strip, which can further reduce the influence of steel strip size caused by steel drawing when the coiler is loaded.

[0040] Further, in some embodiments, when the thickness of the steel strip is less than or equal to 2.0 mm, the roller gap compensation speed of the finishing mill is 0.1 mm / s, and the roller gap compensation amount of the finishing mill is 0.08 mm; when the thickness of the steel strip is greater than 2.0 mm and less than or equal to 3.0 mm, the roller gap compensation speed of the finishing mill is 0.05 mm / s, and the roller gap compensation amount of the finishing mill is 0.05 mm; when the thickness of the steel strip is greater than 3 mm, the roller gap compensation amount of the finishing mill and the roller gap compensation speed of the finishing mill are both 0. Among them, the roller gap compensation speed of the finishing mill is the speed at which the roller gap of the finishing mill is opened, and the roller gap compensation amount of the finishing mill is the size of the roller gap opened in the finishing mill.

[0041] According to some embodiments, the pinch roller compensation comprises a pinch roller speed compensation.

[0042] Based on the above embodiment, before the coiler is loaded, it includes the finishing mill roll gap compensation amount, the finishing mill roll gap compensation speed and the pinch roll speed compensation amount. Among them, the pinch roll speed is compensated so that the strip length between the pinch roll and the finishing mill exceeds the distance between the pinch roll and the finishing mill. When the coiler coils the strip, tension will be generated between the coiler and the finishing mill. By increasing the strip length between the pinch roll and the finishing mill, when tension is generated between the coiler and the finishing mill, the strip length between the pinch roll and the finishing mill can be shortened, thereby eliminating the phenomenon of steel pulling when the coiler is loaded.

[0043] Furthermore, in some embodiments, when the thickness of the strip is less than or equal to 2.0 mm, the pinch roller speed compensation amount is increased, and the compensation amount is the pinch roller speed advance rate + 2%; when the thickness of the strip is greater than 2.0 mm and less than or equal to 3.0 mm, the pinch roller speed compensation amount is increased, and the compensation amount is the pinch roller speed advance rate + 1%; when the thickness of the strip is greater than 3 mm, the pinch roller speed compensation amount is 0.

[0044] Furthermore, before increasing the pinch roller speed compensation amount, the pinch roller set speed is: V = F7SPD × (1 + LEADRATIO).

[0045] After increasing the pinch roller speed compensation amount, the pinch roller set speed is: V = F7SPD × (1 + LEAD RATIO - NECKRATIO).

[0046] Among them, F7SPD is: the strip speed of F7 at the last stand of the finishing mill; LEAD RATIO is: the lead rate; NECK RATIO is: the speed compensation amount.

[0047] The following introduces an apparatus embodiment of the present application, which can be used to execute the method for improving the dimensional accuracy of hot-rolled strip in the above-mentioned embodiment of the present application.

[0048] Figure 2 A schematic diagram of an apparatus for improving the dimensional accuracy of hot-rolled strip in one embodiment of the present application is shown, and the apparatus 200 for improving the dimensional accuracy of hot-rolled strip comprises: a strip position calculation module 201, for obtaining the speed of the strip and the current position of the strip head, and integrating the position of the strip head by speed integral; a compensation control module 202, for calculating and obtaining the position of the strip head in real time, and when the position of the strip head reaches the exit position of the pinch roller, increasing the compensation amount of the finishing mill and the pinch roller compensation amount, so that the strip length between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill; a coiler loading control module 203, for controlling the pinch roller compensation amount to be reset to zero after the coiler is loaded; and a finishing mill control module 204, for resetting the finishing mill compensation amount after the finishing mill has completely cast steel.

[0049] Based on the above embodiments, in the device 200 for improving the dimensional accuracy of hot-rolled strip of the present application, the devices used include: a finishing mill, pinch rollers and a coiler, wherein the pinch rollers are arranged between the finishing mill and the coiler, and after the finishing mill rolls the strip, the strip is transferred to the pinch rollers, the pinch rollers transfer the strip to the coiler, and the coiler completes the coiling of the strip.

[0050] Furthermore, in the strip position calculation module 201, the conveying speed of the strip is first obtained and the current position of the strip is detected, the position of the strip head is integrated by speed integration, and the actual position information of the strip head is calculated by the strip speed and the conveying time.

[0051] Furthermore, in the compensation control module 202, the position of the strip head is calculated in real time according to the transmission time. When the position of the strip head reaches the exit position of the pinch roller, the finishing mill compensation amount and the pinch roller compensation amount are increased to prevent the strip width and thickness fluctuations caused by the unloading of the machine and the establishment of tension by the finishing mill.

[0052] Furthermore, in the coiler loading control module 203, after the coiler is loaded, the pinch roller compensation amount is controlled to be reset to zero, and the speeds of the finishing mill, pinch roller and coiler conveying the strip steel are all synchronized to prevent steel pulling.

[0053] Furthermore, in the finishing mill control module 204, after the finishing mill completely throws a roll of strip steel out of the finishing mill, the finishing mill compensation amount is reset to zero, and the roll gap can be rolled normally and the next roll of strip steel can be transmitted.

[0054] Its working principle is: increase the compensation amount of the finishing mill and the pinch roll compensation amount, so that the strip length between the pinch roll and the finishing mill exceeds the distance between the pinch roll and the finishing mill. When the coiler coils the strip, tension will be generated between the coiler and the finishing mill. By increasing the strip length between the pinch roll and the finishing mill, when tension is generated between the coiler and the finishing mill, the strip length between the pinch roll and the finishing mill can be shortened, thereby eliminating the phenomenon of steel drawing between the coiler and the finishing mill when the coiler is loaded, which makes the strip thinner.

[0055] Furthermore, the compensation amount of the finishing mill is increased by opening the roller gap of the finishing mill and appropriately controlling the speed of roller gap opening so as to increase the thickness of the strip. This can further prevent the coiler and the finishing mill from pulling the strip thin and reduce the impact on the strip size.

[0056] Figure 3 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown.

[0057] It should be noted that Figure 3 The computer system 300 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0058] like Figure 3 As shown, the computer system 300 includes a central processing unit (CPU) 301, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 302 or the program loaded from the storage part 308 to the random access memory (RAM) 303, such as executing the method for improving the dimensional accuracy of hot-rolled strip described in the above embodiment. Various programs and data required for system operation are also stored in RAM 303. CPU 301, ROM 302 and RAM 303 are connected to each other through a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0059] The following components are connected to the I / O interface 305: an input section 306 including a keyboard, a mouse, etc.; an output section 307 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 308 including a hard disk, etc.; and a communication section 309 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 309 performs communication processing via a network such as the Internet. A drive 310 is also connected to the I / O interface 305 as needed. A removable medium 311, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 310 as needed so that a computer program read therefrom is installed into the storage section 308 as needed.

[0060] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 309, and / or installed from a removable medium 311. When the computer program is executed by a central processing unit (CPU) 301, various functions defined in the system of the present application are executed.

[0061] It should be noted that the computer-readable medium shown in the embodiment of the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, - but not limited to - an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by an instruction execution system, device or device or used in combination with it. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0062] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0063] The modules involved in the embodiments described in this application may be implemented by software or hardware, and the modules described may also be set in a processor. The names of these modules do not, in some cases, constitute limitations on the modules themselves.

[0064] As another aspect, the present application further provides a computer program product or a computer program, the computer program product or the computer program including computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device executes the method for improving the dimensional accuracy of hot-rolled steel strip described in the above embodiment.

[0065] As another aspect, the present application also provides a computer-readable medium, which may be included in the electronic device described in the above embodiment; or may exist independently without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements the method for improving the dimensional accuracy of hot-rolled strip described in the above embodiment.

[0066] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0067] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method for improving the dimensional accuracy of hot-rolled strip described in the above embodiment.

[0068] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0069] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for improving the dimensional accuracy of hot-rolled steel strip, characterized in that: The method for improving the dimensional accuracy of hot-rolled strip steel comprises: Obtain the speed of the strip and the current position of the strip head, and integrate the position of the strip head through speed integration; The position of the strip head is obtained by real-time calculation. When the strip head reaches the pinch roll exit position, the finishing mill compensation and pinch roll compensation are increased to make the strip length between the pinch roll and the finishing mill exceed the distance between the pinch roll and the finishing mill. After the coiler is loaded, the compensation amount of the pinch roller is controlled to be reset to zero; After the finishing mill has completely cast steel, the compensation amount of the finishing mill is reset to zero; In real-time calculation to obtain the position of the strip head, when the position of the strip head reaches the pinch roll exit position, the finishing mill compensation amount and the pinch roll compensation amount are increased, the method includes: When the strip head reaches the 1m position of the pinch roll exit, the finishing mill compensation and pinch roll compensation are increased; In real-time calculation to obtain the position of the strip head, when the position of the strip head reaches the pinch roll exit position, the finishing mill compensation amount and the pinch roll compensation amount are increased, the method includes: Acquiring strip steel rolling information, and obtaining the thickness specification of the produced strip steel according to the strip steel rolling information; According to the thickness specification and the relationship between the thickness specification and the thickness fluctuation range, increase the corresponding finishing mill compensation amount and pinch roll compensation amount; The finishing mill compensation amount includes the finishing mill roll gap compensation amount and the finishing mill roll gap compensation speed; The pinch roller compensation amount includes a pinch roller speed compensation amount.

2. The method according to claim 1, characterized in that When the thickness of the strip is less than or equal to 2.0 mm, the finishing mill roll gap compensation speed is 0.1 mm / s, and the finishing mill roll gap compensation amount is 0.08 mm; When the thickness of the steel strip is greater than 2.0 mm and less than or equal to 3.0 mm, the roller gap compensation speed of the finishing mill is 0.05 mm / s, and the roller gap compensation amount of the finishing mill is 0.05 mm; When the thickness of the steel strip is greater than 3 mm, the roller gap compensation amount and the roller gap compensation speed of the finishing mill are both 0.

3. The method according to claim 1, characterized in that When the thickness of the strip is less than or equal to 2.0 mm, the pinch roller speed compensation amount is increased, and the compensation amount is the pinch roller speed leading rate + 2%; When the thickness of the strip is greater than 2.0 mm and less than or equal to 3.0 mm, the pinch roller speed compensation amount is increased, and the compensation amount is the pinch roller speed leading rate + 1%; When the thickness of the strip steel is greater than 3 mm, the pinch roller speed compensation amount is 0.

4. A device for improving the dimensional accuracy of hot-rolled steel strip, characterized in that: The device for improving the dimensional accuracy of hot-rolled strip steel comprises: The strip position calculation module is used to obtain the speed of the strip and the current position of the strip head, and integrate the position of the strip head through speed integration; The compensation control module is used to calculate and obtain the position of the strip head in real time. When the position of the strip head reaches the exit position of the pinch roller, the compensation amount of the finishing mill and the pinch roller is increased so that the strip length between the pinch roller and the finishing mill exceeds the distance between the pinch roller and the finishing mill. The coiler loading control module is used to control the compensation amount of the pinch roller to zero after the coiler is loaded; Finishing mill control module, used to clear the finishing mill compensation amount after the finishing mill has completely cast steel; The compensation control module is specifically used for: When the strip head reaches the 1m position of the pinch roll exit, the finishing mill compensation and pinch roll compensation are increased; The compensation control module is specifically used for: Acquiring strip steel rolling information, and obtaining the thickness specification of the produced strip steel according to the strip steel rolling information; According to the thickness specification and the relationship between the thickness specification and the thickness fluctuation range, increase the corresponding finishing mill compensation amount and pinch roll compensation amount; The finishing mill compensation amount includes the finishing mill roll gap compensation amount and the finishing mill roll gap compensation speed; The pinch roller compensation amount includes a pinch roller speed compensation amount.

5. An electronic device, characterized in that: The electronic device includes one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method for improving the dimensional accuracy of hot-rolled strip as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that: At least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by the processor to implement the operations performed by the method for improving the dimensional accuracy of hot-rolled steel strip as described in any one of claims 1 to 3.

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