Automatic thickness control method, device and equipment for cold-rolled strip steel and medium

Abstract

The invention relates to the technical field of strip steel cold rolling control, and discloses an automatic thickness control method, device and equipment for cold-rolled strip steel and a medium. The automatic thickness control method comprises the following steps: calculating a first compensation speed of an inlet and outlet side coiling machine according to an inlet deviation thickness and an outlet deviation thickness; calculating a second compensation speed of the inlet and outlet side coiling machine and a third compensation speed of the outlet side coiling machine according to the inlet deviation tension and the outlet deviation tension; calculating an entrance setting speed of the entrance-exit side coiler according to the first initial setting speed, the first compensation speed and the second compensation speed so as to control the entrance side coiler based on the entrance setting speed; and calculating an outlet setting speed of the outlet-side coiling machine according to the second initial setting speed and the third compensation speed so as to control the outlet-side coiling machine based on the outlet setting speed. According to the method, multiple factors such as thickness and tension are comprehensively considered, unified and coordinated scheduling is achieved, optimal control is automatically selected, and the thickness precision problem during strip steel cold rolling is solved.

Description

Technical Field

[0001] This application relates to the field of cold rolling control technology for strip steel, and in particular, to an automatic thickness control method, apparatus, equipment, and medium for cold-rolled strip steel. Background Technology

[0002] The thickness accuracy of strip steel is one of the important indicators characterizing its product quality.

[0003] The causes of thickness errors in cold-rolled strip steel can be traced back to all processes in the preceding pickling, preheating of the rolling mill, and even hot continuous rolling production. The reasons that may cause variations in strip thickness and thus differences can be broadly categorized as follows: (1) Factors from the rolling mill include uneven temperature of the incoming material itself, unevenness of several dimensions (thickness, width) and chemical composition segregation, as well as secondary uneven changes in the parameters of the rolled piece during the rolling process; (2) Factors from the rolling mill, including roll eccentricity, thermal expansion and wear, and changes in rolling mill stiffness; (3) Changes in rolling mill process parameters (such as strip tension, rolling speed, and rolling lubrication conditions); (4) Factors related to operation and control, such as manual intervention, computer setting model error, rolling process parameter detection error, and over-adjustment of AGC system.

[0004] Among these many influencing factors, some are independent, while others have intricate causal and coupling relationships with each other, making thickness control one of the most complex control functions in cold rolling of strip steel.

[0005] The thickness of the strip in a rolling mill is typically controlled by roll gap control. Strip tension control uses coiler torque stabilization control (current stabilization control), or TR Torque Control (ACR). These two control methods are independent of each other. During thickness control, the automatic roll gap adjustment inevitably causes passive changes in tension. Since tension control is an open-loop system, and the influence of strip thickness on tension causes a decrease in the tension control response, these passive and unpredictable changes in tension will in turn affect the strip thickness control. This phenomenon is called the interference between strip thickness control and tension control. This interference has a significant impact on the rolling effect, manifesting as a long-period fluctuation of approximately 2 to 10 seconds in the exit strip thickness deviation. Summary of the Invention

[0006] The purpose of this application is to provide an automatic thickness control method, device, equipment and medium for cold-rolled strip steel. This invention comprehensively considers multiple factors such as thickness and tension, coordinates and schedules them in a unified manner, and automatically selects the optimal control output, thus solving the thickness accuracy problem during cold rolling of strip steel.

[0007] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0008] According to one aspect of the embodiments of this application, an automatic thickness control method for cold-rolled strip steel is provided, the automatic thickness control method comprising: The actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet are measured and obtained. The preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet are also obtained. The inlet deviation thickness is calculated based on the actual inlet thickness and the preset inlet thickness; the outlet deviation thickness is calculated based on the actual outlet thickness and the preset outlet thickness; and the first compensation speed of the inlet-side winding machine is calculated based on the inlet deviation thickness and the outlet deviation thickness. The actual tension of the strip at the mill inlet and the actual tension of the strip at the mill outlet are measured and obtained. The preset tension of the strip at the mill inlet and the preset tension of the strip at the mill outlet are also obtained. The inlet deviation tension is calculated based on the actual inlet tension and the preset inlet tension. The outlet deviation tension is calculated based on the actual outlet tension and the preset outlet tension. The second compensation speed of the inlet-side winding machine and the third compensation speed of the outlet-side winding machine are calculated based on the inlet deviation tension and the outlet deviation tension. The first initial set speed of the inlet-side winder is obtained, and the inlet set speed of the inlet-side winder is calculated based on the first initial set speed, the first compensation speed and the second compensation speed, so as to control the inlet-side winder based on the inlet set speed. The second initial set speed of the exit-side winding machine is obtained, and the exit set speed of the exit-side winding machine is calculated based on the second initial set speed and the third compensation speed, so as to control the exit-side winding machine based on the exit set speed.

[0009] In some embodiments, after calculating the inlet deviation tension based on the actual inlet tension and the preset inlet tension, the automatic thickness control method further includes: calculating the roll gap adjustment amount based on the inlet deviation tension; and adjusting the roll gap of the mill based on the roll gap adjustment amount.

[0010] In some embodiments, before measuring and obtaining the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, and obtaining the preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet, the automatic thickness control method further includes: obtaining the rolling force and rolling speed of the strip, and determining whether to proceed to the next step based on the rolling force and the rolling speed; when the rolling force is greater than a set force and the rolling speed is greater than a set speed, proceeding to the next step; when the rolling force is less than a set force and the rolling speed is less than a set speed, not proceeding to the next step.

[0011] In some embodiments, the set force is 800 tons and the set speed is 150 mpm.

[0012] In some embodiments, in measuring and obtaining the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, the automatic thickness control method includes: emitting a first X-ray through an X-ray generator; receiving a second X-ray after attenuation through an ionization chamber; converting the second X-ray into a measurement electrical signal; and calculating the actual thickness of the strip based on the measurement electrical signal.

[0013] In some embodiments, the calculation formula for calculating the inlet set speed of the inlet-side winding machine based on the first initial set speed, the first compensation speed, and the second compensation speed is as follows: V 终1 =V 01 +V1+V2; Among them, V 终1 Set the speed for the inlet, V 01 V1 is the first initial set speed, V2 is the first compensation speed, and V2 is the second compensation speed.

[0014] In some embodiments, the calculation formula for calculating the exit set speed of the exit-side winding machine based on the second initial set speed and the third compensation speed is as follows: V 终2 =V 02 +V3; Among them, V 终2 Set the speed for the exit, V 02 V3 is the second initial speed setting; V4 is the third compensation speed.

[0015] According to one aspect of the embodiments of this application, an automatic thickness control device for cold-rolled strip steel is provided, the automatic thickness control device comprising: The thickness collection module is used to measure and obtain the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, and to obtain the preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet. The first compensation calculation module is used to calculate the inlet deviation thickness based on the actual inlet thickness and the preset inlet thickness, calculate the outlet deviation thickness based on the actual outlet thickness and the preset outlet thickness, and calculate the first compensation speed of the inlet-side winding machine based on the inlet deviation thickness and the outlet deviation thickness. The tension collection module is used to measure and acquire the actual inlet tension of the strip at the mill inlet side and the actual outlet tension of the strip at the mill outlet side, as well as the preset inlet tension of the strip at the mill inlet side and the preset outlet tension of the strip at the mill outlet side. The second compensation calculation module is used to calculate the inlet deviation tension based on the actual inlet tension and the preset inlet tension, calculate the outlet deviation tension based on the actual outlet tension and the preset outlet tension, and calculate the second compensation speed of the inlet-side winding machine and the third compensation speed of the outlet-side winding machine based on the inlet deviation tension and the outlet deviation tension. The first speed calculation module is used to obtain the first initial set speed of the inlet-side winding machine, calculate the inlet set speed of the inlet-side winding machine based on the first initial set speed, the first compensation speed and the second compensation speed, and control the inlet-side winding machine based on the inlet set speed. The second speed calculation module is used to obtain the second initial set speed of the exit-side winding machine, calculate the exit set speed of the exit-side winding machine based on the second initial set speed and the third compensation speed, and control the exit-side winding machine based on the exit set speed.

[0016] According to one aspect of the embodiments of this application, a computer-readable medium is provided having a computer program stored thereon, which, when executed by a processor, implements the automatic thickness control method as described in the above embodiments.

[0017] According to one aspect of the embodiments of this application, an electronic device is provided, including: one or more processors; and a memory for storing executable instructions of the processors, which, when executed by the one or more processors, cause the one or more processors to implement the automatic thickness control method as described in the above embodiments.

[0018] Compared with the prior art, the significant beneficial effects of the technical solution of this application are as follows: The automatic thickness control method of this invention comprehensively considers several factors such as thickness, roll gap, tension and speed, coordinates and schedules them in a unified manner, and automatically selects the optimal control output, thereby effectively reducing the interference phenomenon caused by the simple control of conventional automatic thickness control in the past, and achieving the effect of improving the control accuracy of the exit plate thickness.

[0019] When rolling extremely thin strips, controlling the thickness and tension of the strip is much more challenging. Adopting a hybrid automatic thickness control method based on thickness, tension, and speed roll gap adjustment can significantly improve rolling stability and reduce the risk of strip breakage.

[0020] 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

[0021] The above and other features and advantages of this application will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0022] Figure 1 A flowchart of an automatic thickness control method according to an embodiment of this application is shown; Figure 2 A simplified diagram of an automatic thickness control device according to an embodiment of this application is shown; Figure 3 A schematic diagram of the structure of an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0024] 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.

[0025] 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.

[0026] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily need 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.

[0027] The technical solutions of the embodiments of this application are briefly described below: According to some embodiments, such as Figure 1 As shown, this application provides an automatic thickness control method for cold-rolled strip steel, the automatic thickness control method comprising: Step 101: Measure and obtain the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, and obtain the preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet. Step 102: Calculate the inlet deviation thickness based on the actual inlet thickness and the preset inlet thickness; calculate the outlet deviation thickness based on the actual outlet thickness and the preset outlet thickness; and calculate the first compensation speed of the inlet-side winding machine based on the inlet deviation thickness, the outlet deviation thickness, and the principle of second-flow balance. Step 103: Measure and obtain the actual inlet tension of the strip at the mill inlet side and the actual outlet tension of the strip at the mill outlet side, and obtain the preset inlet tension of the strip at the mill inlet side and the preset outlet tension of the strip at the mill outlet side. Step 104: Calculate the inlet deviation tension based on the actual inlet tension and the preset inlet tension; calculate the outlet deviation tension based on the actual outlet tension and the preset outlet tension; and calculate the second compensation speed of the inlet-side winding machine and the third compensation speed of the outlet-side winding machine based on the inlet deviation tension, the outlet deviation tension, and the constant tension control principle. Step 105: Obtain the first initial set speed of the inlet-side winder, calculate the inlet set speed of the inlet-side winder based on the first initial set speed, the first compensation speed and the second compensation speed, and control the inlet-side winder based on the inlet set speed. Step 106: Obtain the second initial set speed of the exit-side winder, calculate the exit set speed of the exit-side winder based on the second initial set speed and the third compensation speed, and control the exit-side winder based on the exit set speed.

[0028] Specifically, the automatic thickness control method of this application is based on the R900 control system of the Mitsubishi-Hitachi 20-roll mill. It mainly involves seven parts: IMS thickness measurement system, Speed ​​AGC control system, Gap ATR control system, Speed ​​ATR control system, Hitachi industrial control computer, and HMI human-machine interface.

[0029] The IMS thickness measurement system mainly consists of an X-ray generator, an ionization chamber, and thickness measurement software. X-rays can penetrate the material being measured and produce different attenuation effects depending on the material's thickness. The ionization chamber is used to receive the attenuated X-rays that have passed through the material and convert them into electrical signals. The thickness measurement software can accurately calculate the thickness of the strip.

[0030] The Speed ​​AGC control system compares the actual thickness of the strip on the inlet and outlet sides with the preset thickness to obtain the deviation value. It then calculates and adjusts the coiler speed on the inlet side by combining the master speed, backslip coefficient, distance between the thickness gauge and the center position of the mill stand, integral gain, etc.

[0031] The Gap ATR control system measures the actual tension of the strip on the inlet side, compares it with the set tension value to obtain the deviation value, and calculates the compensation value by combining the stiffness coefficient, rolling force, proportional-integral coefficient, etc., to adjust and control the roll gap.

[0032] The Speed ​​ATR control system measures the actual tension values ​​at the inlet and outlet sides, compares them with the preset tension values ​​to obtain the deviation value, and then calculates and adjusts the winding machine speeds at the inlet and outlet sides by combining the master speed, forward and backward slip coefficients, proportional-integral coefficients, etc.

[0033] The Hitachi industrial control computer uses the Hitachi R900 control system (which uses the ∑net-1000 self-healing industrial Ethernet ring network for data exchange). This invention improves the accuracy of automatic thickness control by adding control logic programs, calculation algorithm programs, related gain and proportional-integral parameters, etc., related to the automatic thickness control method of this application to the Hitachi industrial control computer, thereby reducing the interference between plate thickness control and tension control.

[0034] The HMI (Human Machine Interface) is the human-machine interface between production operators and the industrial control computer. Operators need to select whether to activate the automatic thickness control mode of this application within the AGC (Automatic Gauge Control) control mode.

[0035] This application comprehensively considers multiple factors such as strip thickness and tension, coordinates and schedules them uniformly, and automatically selects the optimal control output. This effectively reduces interference caused by the simplicity of conventional automatic thickness control, thereby improving the accuracy of exit plate thickness control. When rolling extremely thin materials, strip thickness and tension control are even more challenging. Adopting a hybrid automatic thickness control method based on thickness, tension, and speed roll gap adjustment can significantly improve rolling stability and reduce the risk of strip breakage.

[0036] To enable those skilled in the art to better understand this application, the following will be combined with Figure 1 The details of this application are described in detail.

[0037] According to some embodiments, after calculating the inlet deviation tension based on the actual inlet tension and the preset inlet tension, the automatic thickness control method further includes: Step 1041: Calculate the roll gap adjustment amount based on the principle of the relationship between inlet deviation tension and tension and rolling force; Step 1042: Adjust the roll gap of the rolling mill according to the roll gap adjustment amount.

[0038] According to some embodiments, before measuring and obtaining the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet in step 101, and before obtaining the preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet, the automatic thickness control method further includes: Step 91: Obtain the rolling force and rolling speed of the strip, and determine whether to proceed to step 101 based on the rolling force and rolling speed; Step 92: When the rolling force is greater than the set force and the rolling speed is greater than the set speed, proceed to step 101; when the rolling force is less than the set force and the rolling speed is less than the set speed, do not proceed to step 101.

[0039] The set force can be set according to actual needs. In the preferred embodiment of this application, the set force is set to 800 tons. The set speed can be set according to actual needs. In the preferred embodiment of this application, the set speed is set to 150 mpm.

[0040] According to some embodiments, in measuring and obtaining the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, the automatic thickness control method includes: In step 1011, a first X-ray is emitted by an X-ray generator; In step 1012, the attenuated second X-rays passing through the strip are received in the ionization chamber; In step 1013, the second X-ray is converted into a measurement electrical signal, and the actual thickness of the strip is calculated based on the measurement electrical signal.

[0041] According to some embodiments, in calculating the inlet set speed of the inlet-side winding machine based on the first initial set speed, the first compensation speed, and the second compensation speed, the calculation method is as follows: V 终1 =V 01 +V1+V2; Among them, V 终1 Set the speed for the inlet, V 01 V1 is the first initial set speed, V2 is the first compensation speed, and V2 is the second compensation speed.

[0042] According to some embodiments, the calculation method for determining the exit set speed of the exit-side winding machine based on the second initial set speed and the third compensation speed is as follows: V 终2 =V 02 +V3; Among them, V 终2 Set the speed for the exit, V 02 V3 is the second initial speed setting; V4 is the third compensation speed.

[0043] The following describes an embodiment of the apparatus of this application, which can be used to execute the automatic thickness control method in the above embodiments of this application.

[0044] Figure 2 A simplified diagram of an automatic thickness control device according to one embodiment of this application is shown. The automatic thickness control device includes: The thickness collection module is used to measure and obtain the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, and to obtain the preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet. The first compensation calculation module is used to calculate the inlet deviation thickness based on the actual inlet thickness and the preset inlet thickness, calculate the outlet deviation thickness based on the actual outlet thickness and the preset outlet thickness, and calculate the first compensation speed of the inlet-side winding machine based on the inlet deviation thickness and the outlet deviation thickness. The tension collection module is used to measure and acquire the actual inlet tension of the strip at the mill inlet side and the actual outlet tension of the strip at the mill outlet side, as well as the preset inlet tension of the strip at the mill inlet side and the preset outlet tension of the strip at the mill outlet side. The second compensation calculation module is used to calculate the inlet deviation tension based on the actual inlet tension and the preset inlet tension, calculate the outlet deviation tension based on the actual outlet tension and the preset outlet tension, and calculate the second compensation speed of the inlet-side winding machine and the third compensation speed of the outlet-side winding machine based on the inlet deviation tension and the outlet deviation tension. The first speed calculation module is used to obtain the first initial set speed of the inlet-side winding machine, calculate the inlet set speed of the inlet-side winding machine based on the first initial set speed, the first compensation speed and the second compensation speed, and control the inlet-side winding machine based on the inlet set speed. The second speed calculation module is used to obtain the second initial set speed of the exit-side winding machine, calculate the exit set speed of the exit-side winding machine based on the second initial set speed and the third compensation speed, and control the exit-side winding machine based on the exit set speed.

[0045] This application comprehensively considers multiple factors such as strip thickness and tension, coordinates and schedules them uniformly, and automatically selects the optimal control output. This effectively reduces interference caused by the simplicity of conventional automatic thickness control, thereby improving the accuracy of exit plate thickness control. When rolling extremely thin materials, strip thickness and tension control are even more challenging. Adopting a hybrid automatic thickness control method based on thickness, tension, and speed roll gap adjustment can significantly improve rolling stability and reduce the risk of strip breakage.

[0046] Figure 3 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.

[0047] It should be noted that, Figure 3 The computer system 300 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0048] like Figure 3 As shown, the computer system 300 includes a Central Processing Unit (CPU) 301, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 302 or programs loaded from storage portion 308 into Random Access Memory (RAM) 303, such as executing the automatic thickness control method described in the above embodiments. Various programs and data required for system operation are also stored in RAM 303. The CPU 301, ROM 302, and RAM 303 are interconnected via bus 304. An input / output (I / O) interface 305 is also connected to bus 304.

[0049] The following components are connected to I / O interface 305: an input section 306 including a keyboard, mouse, etc.; an output section 307 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; 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, modem, etc. The communication section 309 performs communication processing via a network such as the Internet. A drive 310 is also connected to I / O interface 305 as needed. Removable media 311, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 310 as needed so that computer programs read from them can be installed into storage section 308 as needed.

[0050] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 309, and / or installed from removable medium 311. When the computer program is executed by central processing unit (CPU) 301, it performs various functions defined in the system of this application.

[0051] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0052] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0053] The modules described in the embodiments of this application can be implemented in software or hardware, and can also be located in a processor. The names of these modules do not necessarily limit the module itself.

[0054] In another aspect, this application also provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the automatic thickness control method described in the above embodiments.

[0055] In another aspect, this application also provides a computer-readable medium, which may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the electronic device. The computer-readable medium carries one or more programs that, when executed by the electronic device, cause the electronic device to implement the automatic thickness control method described in the above embodiments.

[0056] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0057] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product. This software product can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, and includes several instructions to cause a computing device (such as a personal computer, server, touch terminal, or network device, etc.) to execute the automatic thickness control method described in the above embodiments.

[0058] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0059] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An automatic thickness control method for cold-rolled strip steel, characterized in that, The automatic thickness control method includes: The actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet are measured and obtained. The preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet are also obtained. The inlet deviation thickness is calculated based on the actual inlet thickness and the preset inlet thickness; the outlet deviation thickness is calculated based on the actual outlet thickness and the preset outlet thickness; and the first compensation speed of the inlet-side winding machine is calculated based on the inlet deviation thickness and the outlet deviation thickness. The actual tension of the strip at the mill inlet and the actual tension of the strip at the mill outlet are measured and obtained. The preset tension of the strip at the mill inlet and the preset tension of the strip at the mill outlet are also obtained. The inlet deviation tension is calculated based on the actual inlet tension and the preset inlet tension. The outlet deviation tension is calculated based on the actual outlet tension and the preset outlet tension. The second compensation speed of the inlet-side winding machine and the third compensation speed of the outlet-side winding machine are calculated based on the inlet deviation tension and the outlet deviation tension. The first initial set speed of the inlet-side winder is obtained, and the inlet set speed of the inlet-side winder is calculated based on the first initial set speed, the first compensation speed and the second compensation speed, so as to control the inlet-side winder based on the inlet set speed. The second initial set speed of the exit-side winding machine is obtained, and the exit set speed of the exit-side winding machine is calculated based on the second initial set speed and the third compensation speed, so as to control the exit-side winding machine based on the exit set speed.

2. The automatic thickness control method according to claim 1, characterized in that, After calculating the inlet deviation tension based on the actual inlet tension and the preset inlet tension, the automatic thickness control method further includes: The roll gap adjustment amount is calculated based on the inlet deviation tension; Adjust the roll gap of the rolling mill according to the roll gap adjustment amount.

3. The automatic thickness control method according to claim 1, characterized in that, Before measuring and obtaining the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, and before obtaining the preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet, the automatic thickness control method further includes: Obtain the rolling force and rolling speed of the strip, and determine whether to proceed to the next step based on the rolling force and rolling speed; When the rolling force is greater than the set force and the rolling speed is greater than the set speed, proceed to the next step; when the rolling force is less than the set force and the rolling speed is less than the set speed, do not proceed to the next step.

4. The automatic thickness control method according to claim 3, characterized in that, The set force is 800 tons, and the set speed is 150 mpm.

5. The automatic thickness control method according to claim 1, characterized in that, In the process of measuring and obtaining the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, the automatic thickness control method includes: The first X-ray is emitted through an X-ray generator; The attenuated second X-rays passing through the strip are received in the ionization chamber; The second X-ray is converted into a measurement electrical signal, and the actual thickness of the strip is calculated based on the measurement electrical signal.

6. The automatic thickness control method according to claim 1, characterized in that, The calculation formula for determining the inlet set speed of the inlet-side winding machine based on the first initial set speed, the first compensation speed, and the second compensation speed is as follows: ； in, Set the speed for the entry point. The initial speed is set first. For the first compensation speed, This is the second compensation speed.

7. The automatic thickness control method according to claim 1, characterized in that, The formula for calculating the exit set speed of the exit-side winding machine based on the second initial set speed and the third compensation speed is as follows: ； in, Set a speed for export. Set the second initial speed; This is the third compensation speed.

8. An automatic thickness control device for cold-rolled strip steel, characterized in that, The automatic thickness control device includes: The thickness collection module is used to measure and obtain the actual thickness of the strip at the mill inlet and the actual thickness of the strip at the mill outlet, and to obtain the preset thickness of the strip at the mill inlet and the preset thickness of the strip at the mill outlet. The first compensation calculation module is used to calculate the inlet deviation thickness based on the actual inlet thickness and the preset inlet thickness, calculate the outlet deviation thickness based on the actual outlet thickness and the preset outlet thickness, and calculate the first compensation speed of the inlet-side winding machine based on the inlet deviation thickness and the outlet deviation thickness. The tension collection module is used to measure and acquire the actual inlet tension of the strip at the mill inlet side and the actual outlet tension of the strip at the mill outlet side, as well as the preset inlet tension of the strip at the mill inlet side and the preset outlet tension of the strip at the mill outlet side. The second compensation calculation module is used to calculate the inlet deviation tension based on the actual inlet tension and the preset inlet tension, calculate the outlet deviation tension based on the actual outlet tension and the preset outlet tension, and calculate the second compensation speed of the inlet-side winding machine and the third compensation speed of the outlet-side winding machine based on the inlet deviation tension and the outlet deviation tension. The first speed calculation module is used to obtain the first initial set speed of the inlet-side winding machine, calculate the inlet set speed of the inlet-side winding machine based on the first initial set speed, the first compensation speed and the second compensation speed, and control the inlet-side winding machine based on the inlet set speed. The second speed calculation module is used to obtain the second initial set speed of the exit-side winding machine, calculate the exit set speed of the exit-side winding machine based on the second initial set speed and the third compensation speed, and control the exit-side winding machine based on the exit set speed.

9. An electronic 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, it implements the automatic thickness control method as described in any one of claims 1 to 7.

10. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the automatic thickness control method as described in any one of claims 1 to 7.

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