A method, device, medium and equipment for controlling the inlet temperature of hot rolling finishing

Abstract

This application relates to the field of automated control technology and discloses a method, device, medium, and equipment for controlling the inlet temperature of hot tandem finishing mills. The method comprises: obtaining initialization conditions; obtaining characteristic data, initializing the characteristic data according to the initialization conditions to obtain initialization data; obtaining rolling process data of a steel billet, calculating the steel billet temperature based on the rolling process data and the initialization data; calculating a reheat compensation value based on the steel billet temperature and the initialization data, and performing reheat compensation on the steel billet based on the reheat compensation value and the initialization data. This application improves the control accuracy of the steel billet's finishing mill inlet temperature, thereby improving the temperature control accuracy of the steel billet in subsequent production, ensuring product quality and production stability.

Description

Technical Field

[0001] The present application relates to the field of automation control technology, and in particular, to a method, device, medium and equipment for controlling the inlet temperature of hot rolling finishing. Background Art

[0002] Hot rolling temperature control is divided into several stages, namely heating furnace, rough rolling, finishing rolling and coiling. The temperature in each stage plays a different role. Among them, finishing rolling temperature is the most important stage and also the most complicated stage to control temperature.

[0003] Finishing rolling temperature is controlled by both inlet and outlet temperature. Outlet temperature control is primarily calculated using the inlet temperature as a parameter through a temperature model. Therefore, the accuracy of the inlet temperature directly impacts the accuracy of the outlet temperature. In addition to directly influencing the outlet temperature, the finishing inlet temperature also directly affects coiling temperature control, further influencing the rolling force model and the roll bounce model, thus decisively influencing the control of finished product thickness. Therefore, poor temperature control can have a significant impact on product quality and production stability.

[0004] Currently, there are two main methods for controlling the finishing mill entrance temperature. One is to measure the temperature with a pyrometer at the roughing mill exit, and then calculate the temperature change from the roughing mill exit to the strip entering the finishing mill using a temperature drop model to obtain the finishing mill entrance temperature. The other is to install a pyrometer at the finishing mill entrance to directly measure the finishing mill entrance temperature, and then calculate the temperature change from the pyrometer at the finishing mill entrance to the strip entering the finishing mill using a model.

[0005] Both of the above-mentioned methods for controlling the finishing inlet temperature suffer from the problem of low control accuracy. In the first control method, since the pyrometer at the roughing exit is close to the roughing mill, the temperature of the billet is measured after dephosphorization. At this time, the billet has not yet fully recovered, and there will be a certain deviation in the measured surface temperature and core temperature, which will ultimately affect the control accuracy of the finishing inlet temperature. In the second control method, it takes some time for the billet to be dephosphorized after coming out of the roughing mill and then be measured at the finishing inlet. The long contact time with air at high temperature will produce iron oxide scale. When measuring the temperature of the billet with iron oxide scale, it will affect the pyrometer's measurement of the surface temperature, thereby affecting the control accuracy of the finishing inlet temperature. Summary of the Invention

[0006] The purpose of this application is to provide a method, device, medium and equipment for controlling the inlet temperature of hot rolling finishing, so as to improve the control accuracy of the inlet temperature of steel billet finishing rolling, thereby improving the temperature control accuracy of steel billet in subsequent production and ensuring product quality and production stability.

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

[0008] According to one aspect of an embodiment of the present application, a method for controlling the inlet temperature of hot rolling finishing is provided, the control method comprising: obtaining initialization conditions; obtaining characteristic data, initializing the characteristic data according to the initialization conditions to obtain initialization data; obtaining rolling process data of the steel billet, and calculating the steel billet temperature according to the rolling process data and the initialization data; calculating a rewarming compensation value according to the steel billet temperature and the initialization data, and performing rewarming compensation on the steel billet according to the rewarming compensation value and the initialization data.

[0009] In some embodiments, the initialization conditions include chemical component content and production process parameters.

[0010] In some embodiments, the billet temperature includes the billet head temperature and the billet tail temperature; the characteristic data includes the head temperature recovery model influence coefficient, the tail temperature recovery model influence coefficient, the head influence coefficient of the product type, the tail influence coefficient of the product type, the heating furnace head influence coefficient, the heating furnace tail influence coefficient, the head temperature recovery temperature, the tail temperature recovery temperature, the head temperature recovery compensation upper limit, the head temperature recovery compensation lower limit, the tail temperature recovery compensation upper limit and the tail temperature recovery compensation lower limit.

[0011] In some embodiments, the values ​​of the head temperature recovery model influence coefficient, the tail temperature recovery model influence coefficient, the head influence coefficient of the product type, the tail influence coefficient of the product type, the head influence coefficient of the heating furnace, and the tail influence coefficient of the heating furnace are within the set range.

[0012] In some embodiments, in the step of obtaining the rolling process data of the steel billet and calculating the temperature of the steel billet based on the rolling process data and the initialization data, the method includes: obtaining a first temperature average and a head temperature recovery temperature of the steel billet head through the rough rolling outlet, and obtaining a second temperature average and a tail temperature recovery temperature of the steel billet tail; obtaining a head temperature drop temperature of the steel billet head through the finishing rolling entrance, and obtaining a tail temperature drop temperature of the steel billet tail; calculating the head temperature of the steel billet based on the first temperature average, the head temperature recovery temperature and the head temperature drop temperature; and calculating the tail temperature of the steel billet based on the second temperature average, the tail temperature recovery temperature and the tail temperature drop temperature.

[0013] In some embodiments, in the calculation of the reheating compensation value based on the billet temperature and initialization data, the method includes: obtaining a third temperature average of the billet head and a fourth temperature average of the billet tail through the finishing rolling entrance; obtaining the head reheating model influence coefficient, the tail reheating model influence coefficient, the head influence coefficient of the product type, the tail influence coefficient of the product type, the heating furnace head influence coefficient and the heating furnace tail influence coefficient; calculating the head reheating compensation value based on the billet head temperature, the third temperature average, the head reheating model influence coefficient, the head influence coefficient of the product type and the heating furnace head influence coefficient; calculating the tail reheating compensation value based on the billet tail temperature, the fourth temperature average, the tail reheating model influence coefficient, the product type tail influence coefficient and the heating furnace tail influence coefficient.

[0014] In some embodiments, in the process of performing temperature recovery compensation on the steel billet according to the temperature recovery compensation value and the initialization data, the method further comprises: obtaining an upper limit of temperature recovery compensation for the head, a lower limit of temperature recovery compensation for the head, an upper limit of temperature recovery compensation for the tail, and a lower limit of temperature recovery compensation for the tail; if the lower limit of temperature recovery compensation for the head is less than or equal to the value of temperature recovery compensation for the head, the temperature recovery compensation value for the head of the steel billet is used; if the temperature recovery compensation value for the head is greater than or equal to the upper limit of temperature recovery compensation for the head, the temperature recovery compensation upper limit of the head is used as the temperature recovery compensation value for the head of the steel billet; if the temperature recovery compensation value for the head is less than or equal to the upper limit of temperature recovery compensation for the head, the temperature recovery compensation value for the head of the steel billet is used as the upper limit of temperature recovery compensation for the head of the steel billet; If the lower limit of the tail temperature return compensation is less than or equal to the lower limit of the tail temperature return compensation, the lower limit of the head temperature return compensation is used as the head temperature return compensation value to perform temperature return compensation on the head of the billet; if the lower limit of the tail temperature return compensation is less than or equal to the tail temperature return compensation value less than or equal to the upper limit of the tail temperature return compensation, the tail temperature return compensation value is used to perform temperature return compensation on the tail of the billet; if the tail temperature return compensation value is greater than or equal to the upper limit of the tail temperature return compensation, the upper limit of the tail temperature return compensation is used as the tail temperature return compensation value to perform temperature return compensation on the tail of the billet; if the tail temperature return compensation value is less than the lower limit of the tail temperature return compensation, the lower limit of the tail temperature return compensation is used as the tail temperature return compensation value to perform temperature return compensation on the tail of the billet.

[0015] According to one aspect of an embodiment of the present application, a control device for the entrance temperature of hot rolling finishing is provided, the control device comprising: an initialization condition acquisition module for acquiring initialization conditions; an initialization module for acquiring characteristic data, and initializing the characteristic data according to the initialization conditions to obtain initialization data; a temperature calculation module for acquiring rolling process data of a steel billet, and calculating the steel billet temperature according to the rolling process data and the initialization data; a retemperature compensation module for calculating a retemperature compensation value according to the steel billet temperature and the initialization data, and performing retemperature compensation on the steel billet according to the retemperature compensation value and the initialization data.

[0016] According to one 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 control method described in the above embodiment is implemented.

[0017] According to one aspect of an embodiment 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 control method as described in the above embodiment.

[0018] Compared with the existing technology, the technical solution of this application has significant benefits: it adds temperature reversal compensation control to the finishing rolling inlet temperature control, taking into account the impact of different product types and different heating furnaces on temperature reversal, effectively solving the problem of steel billet temperature reversal after measurement. It improves the accuracy of finishing rolling inlet temperature prediction, enhances the overall temperature control level, and ensures product quality and rolling stability.

[0019] 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

[0020] 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.

[0021] Figure 1 shows a flow chart according to an embodiment of the present application;

[0022] Figure 2 A simplified diagram of a device for controlling the inlet temperature of hot rolling finishing mill according to one embodiment of the present application is shown;

[0023] Figure 3 A schematic structural diagram of a computer system of an electronic device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example 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 so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0025] 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 so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art 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, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0026] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0027] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0028] The technical solutions of the embodiments of the present application are briefly described below:

[0029] First, the steel billets are classified according to the production process parameters and chemical composition content. The steel billets to be rolled are obtained and the chemical composition content of the steel billets to be rolled and the corresponding production process parameters are analyzed.

[0030] The characteristic data corresponding to the steel billet is obtained from the billet, and the characteristic data is initialized based on the chemical composition content and production process parameters to obtain initialization data. Different steel grades have different chemical composition contents and corresponding characteristic data, resulting in different initialization data. If the production process parameters are different, the final initialization data will also be different.

[0031] Furthermore, when the roughing pass is the last pass, the temperature average and drop temperature of the billet at the roughing exit and the finishing entrance are obtained, the billet temperature is calculated based on the temperature average, drop temperature and initialization data, and the billet temperature is predicted.

[0032] Furthermore, a temperature recovery compensation value is calculated according to the billet temperature and the initialization data, and finally the billet is subjected to temperature recovery compensation according to the temperature recovery compensation value and the initialization data.

[0033] When the finishing rolls exceed a set rolling mileage, they need to be replaced to prevent wear and tear from prolonged rolling, which can lead to a decline in rolling quality. If the finishing rolls are being replaced, the process ends. If not, the process continues, obtaining the average temperature and drop temperature of the next billet at the roughing and finishing exits.

[0034] In order to make those skilled in the art better understand this application, Figures 1 to 3 The details of this application are described in detail.

[0035] According to some embodiments, the present application provides a method for controlling the inlet temperature of hot rolling finishing, the control method comprising:

[0036] Step 101, obtaining initialization conditions;

[0037] Step 102, acquiring characteristic data, and initializing the characteristic data according to the initialization condition to obtain initialization data;

[0038] Step 103, acquiring rolling process data of the steel billet, and calculating the temperature of the steel billet according to the rolling process data and the initialization data;

[0039] Step 104 : calculating a temperature recovery compensation value according to the billet temperature and the initialization data, and performing temperature recovery compensation on the billet according to the temperature recovery compensation value and the initialization data.

[0040] Based on the above embodiment, in step 101, initialization conditions are obtained, and the initialization conditions include chemical component content and production process parameters.

[0041] In step 102, characteristic data is acquired. This characteristic data includes the regeneration model influence coefficient, product type influence coefficient, heating furnace influence coefficient, regeneration temperature, and regeneration compensation upper and lower limits. The characteristic data is initialized according to initialization conditions to obtain initialization data. Different steel grades correspond to different characteristic data, and the resulting initialization data will also be different.

[0042] In step 103, the billet rolling process data is acquired. The rolling process data includes the average temperature and drop temperature of the billet at the rough rolling exit and the finishing rolling entrance. The billet temperature is calculated based on the rolling process data and the initialization data. After the billet temperature is calculated, the billet temperature is predicted.

[0043] In step 104, after the temperature recovery compensation value is calculated, the temperature recovery compensation is performed on the steel billet according to the temperature recovery compensation value and the initialization data.

[0044] According to some embodiments, the billet temperature includes a billet head temperature A2(h) and a billet tail temperature A2(t);

[0045] The characteristic data include the head temperature recovery model influence coefficient α(h), the tail temperature recovery model influence coefficient α(t), the head influence coefficient βN(h) of the product type, the tail influence coefficient βN(t) of the product type, the heating furnace head influence coefficient γM(h), the heating furnace tail influence coefficient γM(t), the head temperature recovery temperature TN(h), the tail temperature recovery temperature TN(h), the head temperature recovery compensation upper limit, the head temperature recovery compensation lower limit, the tail temperature recovery compensation upper limit and the tail temperature recovery compensation lower limit.

[0046] Based on the above embodiment, the values ​​of the head temperature recovery model influence coefficient α(h), the tail temperature recovery model influence coefficient α(t), the head influence coefficient βN(h) of the product type, the tail influence coefficient βN(t) of the product type, the heating furnace head influence coefficient γM(h), and the heating furnace tail influence coefficient γM(t) are within a set range. The set range can be set according to actual needs. In some embodiments, the set range is set between 0 and 1.

[0047] According to some embodiments, in step 103, rolling process data of the steel billet is obtained, and the temperature of the steel billet is calculated based on the rolling process data and the initialization data. The method includes:

[0048] Step 1031: obtaining a first average temperature A(h) and a head temperature TN(h) at the rough rolling outlet, and obtaining a second average temperature A(t) and a tail temperature TN(t) at the tail of the billet;

[0049] Step 1032: obtaining the head temperature drop B(h) of the billet head and the tail temperature drop B(t) of the billet tail through the finishing rolling entrance;

[0050] Step 1033, calculating the billet head temperature A2(h) according to the first temperature average A(h), the head temperature recovery temperature TN(h), and the head temperature drop temperature B(h);

[0051] Step 1034 , calculating the billet tail temperature A2(t) according to the second temperature average value A(t), the tail temperature recovery temperature TN(t) and the tail temperature drop temperature B(t).

[0052] Based on the above embodiment, the characteristic data also includes the distance L(h) at the head of the rough rolling outlet, the distance L(t) at the tail of the rough rolling outlet, the distance L1(h) at the head of the finishing rolling entrance, and the distance L1(t) at the tail of the finishing rolling entrance.

[0053] In step 1031, when the rough rolling outlet pyrometer signal is turned on, the first temperature average value A(h) and the head temperature recovery temperature TN(h) within the distance L(h) of the head of the rough rolling outlet of the steel billet are obtained, and when the rough rolling outlet pyrometer signal ends, the second temperature average value A(t) and the tail temperature recovery temperature TN(t) within the distance L(t) of the tail of the steel billet rough rolling outlet are obtained.

[0054] In step 1032, when the pyrometer signal before the finishing entrance is connected, the head temperature drop temperature B(h) within the head value distance L1(h) of the finishing entrance of the steel billet is obtained; when the pyrometer signal before the finishing entrance ends, the tail temperature drop temperature B(t) within the tail value distance L1(t) of the finishing entrance of the steel billet is obtained.

[0055] In step 1033, the billet head temperature A2(h) is calculated using the following formula:

[0056] A2(h)=A(h)+T N (h)-B(h).

[0057] In step 1034, the billet tail temperature A2(t) is calculated using the following formula:

[0058] A2(t)=A(t)+T N (t)-B(t).

[0059] According to some embodiments, in step 104, in calculating the temperature recovery compensation value according to the billet temperature and initialization data, the method includes:

[0060] Step 1041 , obtaining a third average temperature value A1(h) of the head of the billet and a fourth average temperature value A1(t) of the tail of the billet through a finishing rolling entrance;

[0061] Step 1042 , obtaining the head temperature recovery model influence coefficient α(h), the tail temperature recovery model influence coefficient α(t), the head influence coefficient βN(h) of the product type, the tail influence coefficient βN(t) of the product type, the heating furnace head influence coefficient γM(h), and the heating furnace tail influence coefficient γM(t);

[0062] Step 1043: Calculate a head temperature regeneration compensation value based on the billet head temperature A2(h), the third temperature average A1(h), the head temperature regeneration model influence coefficient α(h), the head temperature regeneration coefficient βN(h) of the product type, and the heating furnace head temperature regeneration coefficient γM(h);

[0063] Step 1044, calculate the tail temperature recovery compensation value based on the billet tail temperature A2(t), the fourth temperature mean A1(t), the tail temperature recovery model influence coefficient α(t), the product type tail influence coefficient βN(t) and the heating furnace tail influence coefficient γM(t).

[0064] Based on the above embodiment, in step 1041, when the pyrometer signal before the finishing rolling entrance is connected, the third temperature average value A1(h) within the value distance L1(h) of the head of the finishing rolling entrance of the steel billet is obtained, and when the pyrometer signal before the finishing rolling entrance ends, the fourth temperature average value A1(t) within the value distance L1(t) of the tail of the finishing rolling entrance of the steel billet is obtained.

[0065] Furthermore, in step 1043, the head temperature return compensation value C(h) is calculated using the following formula:

[0066] C(h)=(A2(h)-A1(h))×(α(h)+βN(h)+γM(h)) / 3.

[0067] Furthermore, in step 1044, the tail temperature return compensation value C(t) is calculated using the following formula:

[0068] C(t)=(A2(t)-A1(t))×(α(t)+βN(t)+γM(t)) / 3.

[0069] According to some embodiments, in step 104, in performing temperature regeneration compensation on the steel billet according to the temperature regeneration compensation value and the initialization data, the method further includes:

[0070] Step 1045 , obtaining the upper limit of the head temperature return compensation, the lower limit of the head temperature return compensation, the upper limit of the tail temperature return compensation, and the lower limit of the tail temperature return compensation;

[0071] Step 1046: If the head temperature recovery compensation lower limit ≤ the head temperature recovery compensation value C(h) ≤ the head temperature recovery compensation upper limit, then use the head temperature recovery compensation value C(h) to perform temperature recovery compensation on the billet head; if the head temperature recovery compensation value C(h) is greater than the head temperature recovery compensation upper limit, then use the head temperature recovery compensation upper limit as the head temperature recovery compensation value C(h) to perform temperature recovery compensation on the billet head; if the head temperature recovery compensation value C(h) is less than the head temperature recovery compensation lower limit, then use the head temperature recovery compensation lower limit as the head temperature recovery compensation value C(h) to perform temperature recovery compensation on the billet head;

[0072] Step 1047: if the lower limit of the tail temperature recovery compensation is ≤ the tail temperature recovery compensation value C(t) ≤ the upper limit of the tail temperature recovery compensation, then the tail temperature recovery compensation value C(t) is used to perform temperature recovery compensation on the tail of the billet; if the tail temperature recovery compensation value C(t) is greater than the upper limit of the tail temperature recovery compensation, then the upper limit of the tail temperature recovery compensation is used as the tail temperature recovery compensation value C(t) to perform temperature recovery compensation on the tail of the billet; if the tail temperature recovery compensation value C(t) is less than the lower limit of the tail temperature recovery compensation, then the lower limit of the tail temperature recovery compensation is used as the tail temperature recovery compensation value C(t) to perform temperature recovery compensation on the tail of the billet.

[0073] Based on the above embodiment, the updated head temperature TN(h)1 is calculated by the following formula:

[0074] T N (h)1=T N (h)+C(h).

[0075] The updated tail temperature TN(t)1 is calculated using the following formula:

[0076] T N (t)1=T N (t)+C(t).

[0077] The following introduces an embodiment of the device of the present application, which can be used to execute the control method in the above-mentioned embodiment of the present application.

[0078] Figure 2 A simplified diagram of a hot rolling finishing inlet temperature control device 200 in one embodiment of the present application is shown. The hot rolling finishing inlet temperature control device 200 includes:

[0079] Initialization condition acquisition module 201, used to obtain initialization conditions;

[0080] Initialization module 202, used to obtain characteristic data, and initialize the characteristic data according to the initialization conditions to obtain initialization data;

[0081] The temperature calculation module 203 is used to obtain the rolling process data of the steel billet and calculate the temperature of the steel billet according to the rolling process data and the initialization data;

[0082] The re-temperature compensation module 204 is configured to calculate a re-temperature compensation value according to the billet temperature and initialization data, and perform re-temperature compensation on the billet according to the re-temperature compensation value and initialization data.

[0083] Based on the above embodiment, in the initialization condition acquisition module 201, the initialization conditions are acquired, and the initialization conditions include chemical component content and production process parameters.

[0084] Initialization module 202 acquires characteristic data, including the regeneration model influence coefficient, product type influence coefficient, heating furnace influence coefficient, regeneration temperature, and regeneration compensation upper and lower limits. The characteristic data is initialized according to the initialization conditions to obtain initialization data. Different steel grades correspond to different characteristic data, and the resulting initialization data will also be different.

[0085] In the temperature calculation module 203, the billet rolling process data is acquired. The rolling process data includes the average temperature and the drop temperature of the billet at the rough rolling exit and the finishing rolling entrance. The billet temperature is calculated based on the rolling process data and the initialization data. After the billet temperature is calculated, the billet temperature is predicted.

[0086] In the temperature recovery compensation module 204 , after the temperature recovery compensation value is calculated, temperature recovery compensation is performed on the steel billet according to the temperature recovery compensation value and the initialization data.

[0087] Figure 3 A schematic diagram of the structure of a computer system suitable for implementing an electronic device according to an embodiment of the present application is shown.

[0088] 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.

[0089] 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 control method described in the above embodiment. Various programs and data required for system operation are also stored in the RAM 303. The CPU 301, ROM 302 and RAM 303 are connected to each other via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0090] The following components are connected to the I / O interface 305: an input section 306 including a keyboard, a mouse, and the like; an output section 307 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 308 including a hard disk and the like; and a communication section 309 including a network interface card such as a LAN (Local Area Network) card or a modem. 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. Removable media 311, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 310 as needed, so that computer programs read therefrom can be installed into the storage section 308 as needed.

[0091] 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 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 via the communication section 309, and / or installed from a removable medium 311. When the computer program is executed by the central processing unit (CPU) 301, the various functions defined in the system of the present application are executed.

[0092] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can 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 can 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 can be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0093] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. Among them, each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that 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 the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0094] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. In some cases, the names of these units do not constitute limitations on the units themselves.

[0095] As another aspect, the present application further provides a computer program product or computer program, which includes 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 control method described in the above embodiment.

[0096] As another aspect, the present application further provides a computer-readable medium, which may be included in the electronic device described in the above embodiments, or may exist independently without being incorporated into the electronic device. The computer-readable medium carries one or more programs, and when the one or more programs are executed by the electronic device, the electronic device implements the control method described in the above embodiments.

[0097] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiment of the application, the features and functions of two or more modules or units described above can be concretized in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0098] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments 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, and includes 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 control method described in the above embodiments.

[0099] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.

[0100] It should be understood that the present application is not limited to the exact structures 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 controlling the inlet temperature of hot rolling finishing mill, characterized in that: The control method includes: Get initialization conditions; Acquiring characteristic data, and initializing the characteristic data according to the initialization conditions to obtain initialization data; the characteristic data including a head temperature recovery model influence coefficient, a tail temperature recovery model influence coefficient, a head temperature recovery coefficient of a product type, a tail temperature recovery coefficient of a product type, a heating furnace head temperature recovery coefficient, a heating furnace tail temperature recovery temperature, a head temperature recovery compensation upper limit, a head temperature recovery compensation lower limit, a tail temperature recovery compensation upper limit, and a tail temperature recovery compensation lower limit; Acquire rolling process data of the steel billet, and calculate the temperature of the steel billet according to the rolling process data and the initialization data; the steel billet temperature includes the temperature of the head of the steel billet and the temperature of the tail of the steel billet; A temperature recovery compensation value is calculated according to the billet temperature and the initialization data, and temperature recovery compensation is performed on the billet according to the temperature recovery compensation value and the initialization data.

2. The control method according to claim 1, characterized in that: The initialization conditions include chemical composition content and production process parameters.

3. The control method according to claim 1, characterized in that: The values ​​of the head temperature recovery model influence coefficient, the tail temperature recovery model influence coefficient, the head influence coefficient of the product type, the tail influence coefficient of the product type, the heating furnace head influence coefficient, and the heating furnace tail influence coefficient are within the set range.

4. The control method according to claim 1 or 3, characterized in that: In the step of obtaining the rolling process data of the steel billet and calculating the temperature of the steel billet according to the rolling process data and the initialization data, the method includes: Obtaining a first temperature average value and a head temperature recovery temperature of the billet head through a rough rolling outlet, and obtaining a second temperature average value and a tail temperature recovery temperature of the billet tail; Obtaining the head temperature drop of the billet head through the finishing rolling entrance, and obtaining the tail temperature drop of the billet tail; Calculating the billet head temperature based on the first temperature average, the head temperature recovery temperature, and the head temperature drop temperature; The tail temperature of the steel billet is calculated according to the second temperature average, the tail temperature recovery temperature and the tail temperature drop temperature.

5. The control method according to claim 4, characterized in that: In calculating the reheating compensation value according to the billet temperature and initialization data, the method includes: obtaining a third temperature average value of the head of the steel billet through a finishing rolling entrance, and obtaining a fourth temperature average value of the tail of the steel billet; Obtain the head temperature recovery model influence coefficient, the tail temperature recovery model influence coefficient, the head influence coefficient of the product type, the tail influence coefficient of the product type, the heating furnace head influence coefficient, and the heating furnace tail influence coefficient; Calculating a head reheat compensation value based on the billet head temperature, the third temperature mean, the head reheat model influence coefficient, the head influence coefficient of the product type, and the head influence coefficient of the heating furnace; Calculating a tail temperature recovery compensation value according to the billet tail temperature, the fourth temperature mean, the tail temperature recovery model influence coefficient, the tail influence coefficient of the product type, and the heating furnace tail influence coefficient; The updated head recovery temperature TN(h)1 is calculated using the following formula: T N (h)1=T N (h)+C(h) The updated tail temperature TN(t)1 is calculated using the following formula: T N (t)1=T N (t)+C(t) Wherein, TN(h) is the head temperature, C(h) is the head temperature compensation value, TN(t) is the tail temperature, and C(t) is the tail temperature compensation value.

6. The control method according to claim 5, characterized in that: In performing temperature regeneration compensation on the steel billet according to the temperature regeneration compensation value and the initialization data, the method further includes: Get the upper limit of head temperature return compensation, the lower limit of head temperature return compensation, the upper limit of tail temperature return compensation, and the lower limit of tail temperature return compensation; If the head temperature return compensation lower limit ≤ the head temperature return compensation value ≤ the head temperature return compensation upper limit, the head temperature return compensation value is used to perform temperature return compensation on the head of the billet; if the head temperature return compensation value is greater than the head temperature return compensation upper limit, the head temperature return compensation upper limit is used as the head temperature return compensation value to perform temperature return compensation on the head of the billet; if the head temperature return compensation value is less than the head temperature return compensation lower limit, the head temperature return compensation lower limit is used as the head temperature return compensation value to perform temperature return compensation on the head of the billet; If the lower limit of the tail temperature return compensation is ≤ the tail temperature return compensation value ≤ the upper limit of the tail temperature return compensation, the tail temperature return compensation value is used to perform temperature return compensation on the tail of the billet; if the tail temperature return compensation value is greater than the upper limit of the tail temperature return compensation, the upper limit of the tail temperature return compensation is used as the tail temperature return compensation value to perform temperature return compensation on the tail of the billet; if the tail temperature return compensation value is less than the lower limit of the tail temperature return compensation, the lower limit of the tail temperature return compensation is used as the tail temperature return compensation value to perform temperature return compensation on the tail of the billet.

7. A device for controlling the inlet temperature of hot rolling finishing mill, characterized in that: The control device comprises: Initialization condition acquisition module, used to obtain initialization conditions; an initialization module, configured to obtain characteristic data and initialize the characteristic data according to the initialization conditions to obtain the initialization data; the characteristic data including a head temperature recovery model influence coefficient, a tail temperature recovery model influence coefficient, a head temperature recovery coefficient of a product type, a tail temperature recovery coefficient of a product type, a heating furnace head temperature recovery coefficient, a heating furnace tail temperature recovery temperature, a head temperature recovery compensation upper limit, a head temperature recovery compensation lower limit, a tail temperature recovery compensation upper limit, and a tail temperature recovery compensation lower limit; a temperature calculation module, configured to obtain rolling process data of the steel billet and calculate the temperature of the steel billet according to the rolling process data and the initialization data; the temperature of the steel billet includes the temperature of the head portion of the steel billet and the temperature of the tail portion of the steel billet; The re-temperature compensation module is used to calculate a re-temperature compensation value according to the temperature of the steel billet and the initialization data, and perform re-temperature compensation on the steel billet according to the re-temperature compensation value and the initialization data.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the operations performed by the control method according to any one of claims 1 to 6.

9. An electronic device, characterized in that: The electronic device includes one or more processors and one or more memories, wherein the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the control method according to any one of claims 1 to 6.

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