Method, device, medium and equipment for temperature control of strip steel in a mode of headless rolling

Abstract

This invention relates to the field of metal rolling technology, and particularly to a method, apparatus, medium, and equipment for temperature control of strip steel in an endless rolling mode. The temperature control method includes: identifying n target rolling steel grades for the strip steel; wherein n is 2 or 3; obtaining target rolling parameters corresponding to each target rolling steel grade; establishing a temperature control model based on the target rolling parameters; and calculating the transition temperature and transition length between two adjacent steel grades using the temperature control model. Through the method provided in this embodiment, using an endless rolling mode, when producing special steel grades such as cold-formed high-strength steel and hot-formed high-strength steel on the same coil of strip steel, the flat coil defect of the strip steel is eliminated, and automatic uncoiling is achieved, ensuring continuous production and improving the production qualification rate and production efficiency of the strip steel.

Description

Technical Field

[0001] This invention relates to the field of metal rolling technology, and more particularly to a method, apparatus, medium, and equipment for temperature control of strip steel in a headless rolling mode. Background Technology

[0002] In hot rolling production, the process of welding the rough-rolled strip on an intermediate roller table and continuously passing it through the finishing mill is called endless rolling. Endless rolling is commonly used to produce different types of high-strength steel on the same coil. However, when producing both cold-formed and hot-formed high-strength steels simultaneously on the same coil in endless rolling, frequent flattening defects cause the strip to automatically unwind, leading to production interruptions and reduced yield and efficiency. Therefore, preventing flattening defects and ensuring continuous production when using endless rolling to produce both cold-formed and hot-formed high-strength steels on the same coil is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] This invention provides a method, apparatus, medium, and equipment for temperature control of strip steel in a headless rolling mode. It solves the technical problem of how to prevent strip steel from developing flattening defects and automatically unwind the coil to ensure continuous production when producing special steel grades such as cold-formed high-strength steel and hot-formed high-strength steel on the same coil of strip steel using a headless rolling mode.

[0004] In a first aspect, the present invention provides a method for temperature control of strip steel in a headless rolling mode, the temperature control method comprising:

[0005] Identify n target rolled steel grades of the strip; where the value of n is 2 or 3;

[0006] Obtain the target rolling parameters corresponding to each target rolled steel grade, establish a temperature control model based on the target rolling parameters, and calculate the transition temperature and transition length between two adjacent steel grades through the temperature control model;

[0007] The transition temperature and transition length are iteratively corrected using the temperature control model to obtain the target transition temperature and target transition length.

[0008] Furthermore, the target rolling parameters include the target rolling length, target coiling temperature, rolling speed, and cooling water volume.

[0009] Furthermore, the target winding temperature is calculated using the winding temperature model in the temperature control model;

[0010] The winding temperature model specifically includes:

[0011] CTiset =f(l i ,h q ,V,Q i CT i C Apt1i )

[0012] in,

[0013] i represents the number of each target rolled steel grade;

[0014] CT iset This indicates the target coiling temperature set for the target rolled steel grade corresponding to the specified number;

[0015] l i Indicates the target rolling length;

[0016] V represents the rolling speed;

[0017] Q i This indicates the current cooling water volume for the target rolled steel grade corresponding to the specified number;

[0018] CT i This indicates the current coiling temperature of the target rolled steel grade corresponding to the specified number;

[0019] C Apt1i This represents the adaptive coefficient for the target rolled steel grade corresponding to the specified number.

[0020] Furthermore, the transition temperature is calculated using the transition temperature model in the temperature control model;

[0021] The transition temperature model specifically includes:

[0022] ∆CT=f(C V CT i CT i+1 )

[0023] in,

[0024] ∆CT represents the temperature of the transition section;

[0025] C V Indicates the temperature compensation value;

[0026] CT i With CT i+1 These represent the current coiling temperatures of two adjacent target rolled steel grades.

[0027] Furthermore, the transition length is calculated using the transition segment length model in the temperature control model;

[0028] The transition segment length model specifically includes:

[0029] ∆l=f(b) l ,P,∆CT)

[0030] in,

[0031] ∆l represents the transition length;

[0032] b l Indicates the length of the equipment's inertia during operation;

[0033] P represents the shear point tracking position;

[0034] ∆CT represents the temperature of the transition section.

[0035] Furthermore, the method also includes determining the type of the shear point based on the PDI setting value.

[0036] Furthermore, the types of shear points include:

[0037] The pseudo-virtual shearing point is used as an identifier for temperature control, transition control, and cutting position between two adjacent target rolled steel grades within the same coil;

[0038] True / virtual shearing points are used as markers for temperature control, transition control, and cutting positions between different coiled steel strips.

[0039] Secondly, the present invention provides a temperature control device for strip steel in a headless rolling mode, the temperature control device comprising:

[0040] The identification module is used to identify n target rolled steel grades of the strip; where the value of n is 2 or 3;

[0041] The calculation module is used to obtain the target rolling parameters corresponding to each target rolled steel grade, establish a temperature control model based on the target rolling parameters, and calculate the transition temperature and transition length between two adjacent steel grades through the temperature control model.

[0042] Thirdly, the present invention provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method described in any of the first aspects.

[0043] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any of the first aspects.

[0044] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0045] In this embodiment of the invention, a method for temperature control of strip steel in a headless rolling mode is provided. This method includes identifying n target rolling steel grades for the strip steel, where n is 2 or 3; obtaining target rolling parameters corresponding to each target rolling steel grade; establishing a temperature control model based on the target rolling parameters; and calculating the transition temperature and transition length between two adjacent steel grades using the temperature control model. By using the headless rolling mode to produce special steel grades such as cold-formed high-strength steel and hot-formed high-strength steel on the same coil of strip steel, the method eliminates strip flattening defects and enables automatic uncoiling, ensuring continuous production and improving the strip steel's production qualification rate and efficiency. Attached Figure Description

[0046] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0047] Figure 1 A flowchart illustrating the steps of the control method in Embodiment 1 of the present invention is shown;

[0048] Figure 2 A schematic diagram of strip coiling temperature control in Embodiment 1 of the present invention is shown;

[0049] Figure 3 This diagram illustrates the effect of strip coiling temperature control in Embodiment 1 of the present invention.

[0050] Figure 4 A schematic diagram of the control device structure in Embodiment 2 of the present invention is shown;

[0051] Figure 5 A schematic diagram of the electronic structure device in Embodiment 3 of the present invention is shown. Detailed Implementation

[0052] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0053] Example 1

[0054] In the hot-rolling process, special steel grades such as cold-formed high-strength steel and hot-formed high-strength steel are highly sensitive to temperature. For example, cold-formed high-strength steel has high hardenability and requires low-temperature coiling control; the upper limit of the production temperature for cold-formed high-strength steel is 450°C. When the coiling temperature exceeds 450°C, phase transformation factors cause flattening defects in the strip, making automatic uncoiling impossible on the coiler, with the flattening being more severe for thinner strips. Similarly, hot-formed high-strength steel requires high-temperature coiling control; the lower limit of the production temperature for hot-formed high-strength steel is 650°C. When the coiling temperature exceeds 450°C, flattening defects also occur in the strip, preventing automatic uncoiling impossible on the coiler, with the flattening being more severe for thinner strips. Current technology cannot simultaneously produce special steel grades such as cold-formed high-strength steel and hot-formed high-strength steel on the same coil of strip.

[0055] Embodiment 1 of the present invention provides a temperature control method for strip steel in the endless rolling mode, which solves the technical problem of how to prevent strip steel from flattening defects and automatically unwind the coil to ensure continuous production when producing special steel grades such as cold-formed high-strength steel and hot-formed high-strength steel on the same coil of strip steel using the endless rolling mode.

[0056] The embodiments of the present invention provide as shown in the appendix. Figure 1 The flowchart of the temperature control method shown is as follows:

[0057] Step S1: Identify n target rolled steel grades of the strip; where the value of n is 2 or 3;

[0058] Step S2: Obtain the target rolling parameters corresponding to each target rolled steel grade, establish a temperature control model based on the target rolling parameters, and calculate the transition temperature and transition length between two adjacent steel grades through the temperature control model.

[0059] Appendix Figure 2 The schematic diagram of coiling temperature control provided in this embodiment shows that after the rolling mill receives the rolling information, before the strip enters the cold roll table, it first performs two model setting calculations for a whole coil of strip based on the target rolling length and the target coiling temperature. By setting different target coiling temperatures for the two targets and performing model calculations, it successfully achieves the production of two different steel grades of strip with the pseudo-virtual shearing point as the boundary. This eliminates the phenomenon of strip flattening defects and automatic uncoiling in the headless rolling mode, ensuring the continuous production of the hot rolling line.

[0060] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0061] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0062] The following uses the production of steel coils in the endless rolling mode as an example to explain in detail the control method provided in this embodiment.

[0063] This embodiment provides, for example Figure 1 The temperature control method for strip steel in the endless rolling mode shown includes steps S1-S2.

[0064] Step S1: Identify n target rolled steel grades of the strip; where n is 2 or 3.

[0065] It should be noted that in actual production, the method provided in this embodiment is also applicable when there are 3 or more types of steel to be produced. However, when the value of n is greater than 3, since the length of a steel coil is limited, if the value of n is too large, the strip length of each steel type produced will be too small, which is not very practical. Therefore, the value of n is generally taken as 2 or 3.

[0066] According to the rolling schedule, the production objective of Example 1 is to roll the same steel coil into thin-gauge steel coils with a thickness of 1.5 mm using a headless rolling mode. The produced steel coils include thin-gauge hot-formed steel and thin-gauge cold-formed steel. Therefore, in this example, n=2, and the target rolled steel grades are thin-gauge hot-formed steel and thin-gauge cold-formed steel.

[0067] In this embodiment, thin-gauge hot-formed steel is produced first, followed by thin-gauge cold-formed steel. The production process requires continuous rolling of the steel coils using a headless rolling method. The areas of the strip steel that need to be rolled into thin-gauge hot-formed steel and thin-gauge cold-formed steel will be referred to as the first coil and the second coil, respectively.

[0068] In this embodiment, after the rolling mill receives the rolling information, before the strip enters the cooling roll table, it first performs two model setting calculations for a whole coil of strip based on the target rolling length and the target coiling temperature. By setting different target coiling temperatures for the two targets, it successfully produces two different steel grades of strip with a pseudo-virtual shear point as the boundary.

[0069] Step 2: Obtain the target rolling parameters corresponding to each target rolled steel grade, establish a temperature control model based on the target rolling parameters, and calculate the transition temperature and transition length between two adjacent steel grades through the temperature control model.

[0070] As an optional implementation, the target rolling parameters include target rolling length, target coiling temperature, rolling speed, and cooling water volume.

[0071] Specifically, it includes the following steps:

[0072] Step S21: Calculate the target winding temperature using the winding temperature model in the temperature control model.

[0073] As shown in the figure, the winding temperature control method

[0074] The winding temperature model specifically includes:

[0075] CT iset =f(l i ,h q ,V,Q i CT i C Apt1i )

[0076] in,

[0077] i represents the number of each target rolled steel grade. In this embodiment, i = 1, 2.

[0078] CT iset This indicates the target coiling temperature set for the target rolled steel grade corresponding to the specified number;

[0079] l i The target rolling length is represented by l = l1 + l2, ​​which is the total length of the coiled strip.

[0080] V represents the rolling speed, and the data is obtained through settings in the central control system;

[0081] Q i This indicates the current cooling water volume for the target rolled steel grade corresponding to the specified number. The data is set and acquired through the central control system.

[0082] CT i This indicates the current coiling temperature of the target rolled steel grade corresponding to the specified number, which is obtained through temperature sensor measurement;

[0083] C Apt1i This represents the adaptive coefficient for the target rolled steel grade corresponding to the specified number, in C. Apt11 C is used for adapting and updating the temperature data in the first volume. Apt12 Used for adapting and updating the temperature data in the second volume.

[0084] Based on the winding temperature model:

[0085] CT 1set =f(l1,h q,V,Q1,CT1,C Apt1i )

[0086] CT 2set =f(l2,h q ,V,Q2,CT2,C Apt1i )

[0087] Thus, the target winding temperature CT of the first small roll is determined. 1set And the target winding temperature CT of the second small roll 1set .

[0088] Step S22: The transition section temperature is calculated using the transition section temperature model in the temperature control model.

[0089] The transition temperature model specifically includes:

[0090] ∆CT=f(C V CT i CT i+1 )

[0091] in,

[0092] ∆CT represents the temperature of the transition section;

[0093] C V This indicates the temperature compensation value, which is determined by the temperature control priority for the two steel grades.

[0094] For example, if the temperature control of the first roll takes priority, Cv compensates for the temperature at the head of the second roll; if the temperature control of the second roll takes priority, Cv compensates for the temperature at the tail of the first roll.

[0095] CT i With CT i+1 These represent the current coiling temperatures of two adjacent target rolled steel grades.

[0096] The current winding temperature CT1 of the first roll and the current winding temperature CT2 of the second roll have been obtained in the previous step. Therefore, the transition temperature ∆CT of the transition section between the first roll and the second roll can be obtained in the current step.

[0097] In steps S21 and S22, based on the actual winding temperature control of the two small coils of strip before and after the sham virtual shear point in a whole coil of strip, the two small coils of strip are self-learned and adapted respectively, and used as compensation updates for the next coil of strip.

[0098] Step S23: Calculate the transition length using the transition length model in the temperature control model.

[0099] The transition segment length model specifically includes:

[0100] ∆l=f(b) l ,P,∆CT)

[0101] in,

[0102] ∆l represents the transition length;

[0103] b l Indicates the length of the equipment's inertia during operation;

[0104] P represents the shear point tracking position;

[0105] ∆CT represents the temperature of the transition section.

[0106] The transition temperature ∆CT of the transition section between the first and second sub-rolls has been obtained in the previous step, and the inertial length of the equipment is obtained from the product manual.

[0107] As an optional implementation, this embodiment determines the type of the shear point based on the PDI setting value.

[0108] As an optional implementation, the types of shear points include:

[0109] The pseudo-virtual shearing point is used as an identifier for temperature control, transition control, and cutting position between two adjacent target rolled steel grades within the same coil;

[0110] True / virtual shearing points are used as markers for temperature control, transition control, and cutting positions between different coiled steel strips.

[0111] Specifically, when the PDI setting is issued, the point distinguishing two steel grades within the same coil of strip is used as a pseudo-virtual shearing point. This pseudo-virtual shearing point serves as an identifier for temperature control and transition control, and is also used to distinguish and cut two steel grades within the same coil of strip offline. The true virtual shearing point, on the other hand, is used to distinguish whether they are from the same steel coil and is used to cut different steel coils.

[0112] It should be noted that the transition length between two adjacent steel grades in the same coil should be as short as possible to achieve a rapid temperature transition between the first and second coils; and the length of the transition section needs to be included before the true and false shear points to ensure effective control of the temperature and length of the two steel grades within the same coil.

[0113] As an optional implementation, when n equals 3, that is, when there are 3 steel grades to be rolled on the same coil of strip, or when after rolling the second coil, it is necessary to roll the same two steel grades of strip on the next coil of strip, repeat the above steps S1-S2 to obtain the transition temperature ΔCT' and transition length Δl' between the second coil and the third coil, or between the second coil of this coil and the first coil of the next coil.

[0114] Using the method provided in this embodiment, the target rolling data obtained are shown in Table 1:

[0115] Table 1:

[0116]

[0117] The three sets of target rolling data obtained in Table 1 were applied to hot rolling production in the headless mode. The coiling temperature control effect obtained using the first set of target rolling data is as follows: Figure 3 As shown, the horizontal axis represents the strip length, and the vertical axis represents the strip temperature. Figure 3 As can be seen, for 1800m long strip steel in the same coil, during the rolling of thin-gauge hot-formed steel, the rolling temperature remains stable at around 660°C within the first coil (0-890m length), while within the second coil (910.6-1800m length), the rolling temperature remains stable at around 390°C. In the transition section between the first and second coils (20.6m length), the strip experiences a cooling rate of 144.8°C / s. In the transition section between the second coil and the next coil (28.1m length), the strip experiences a heating rate of 226°C / s.

[0118] In this embodiment, after receiving the rolling information, the rolling mill performs two model calculations on a whole coil of strip before the strip enters the cold roll table, based on the target rolling length and target coiling temperature. By setting different target coiling temperatures for the two targets, the model calculations successfully produce two different steel grades of strip with a pseudo-virtual shear point as the boundary. This eliminates the phenomenon of strip flattening defects and automatic uncoiling that occurs in the endless rolling mode, ensuring continuous production on the hot rolling line. Furthermore, it achieves precise control over the transition section between the two smaller coils within a whole coil, as well as between the two smaller coils, providing important support and effective control methods for the development of endless rolling of ultra-thin high-strength steel.

[0119] The method provided in this embodiment, using a headless rolling mode, eliminates the flat coil defect of the strip and enables automatic uncoiling when producing special steel grades such as cold-formed high-strength steel and hot-formed high-strength steel on the same coil of strip, ensuring continuous production and improving the production qualification rate and production efficiency of the strip.

[0120] Example 2

[0121] Based on the same inventive concept, Embodiment 2 of the present invention provides the following... Figure 4 The temperature control device shown is a strip steel temperature control device in a headless rolling mode, the temperature control device comprising:

[0122] The identification module 100 is used to identify n target rolled steel grades of the strip; wherein the value of n is 2 or 3.

[0123] The calculation module 200 is used to obtain the target rolling parameters corresponding to each target rolled steel grade, establish a temperature control model based on the target rolling parameters, and calculate the transition temperature and transition length between two adjacent steel grades through the temperature control model.

[0124] As an alternative implementation, the target rolling parameters used by the calculation module 200 include the target rolling length, target coiling temperature, rolling speed, and cooling water volume.

[0125] As an alternative implementation, the target winding temperature used by the calculation module 200 is calculated by the winding temperature model in the temperature control model;

[0126] The winding temperature model specifically includes:

[0127] CT iset =f(l i ,h q ,V,Q i CT i C Apt1i )

[0128] in,

[0129] i represents the number of each target rolled steel grade;

[0130] CT iset This indicates the target coiling temperature set for the target rolled steel grade corresponding to the specified number;

[0131] l i Indicates the target rolling length;

[0132] V represents the rolling speed;

[0133] Q i This indicates the current cooling water volume for the target rolled steel grade corresponding to the specified number;

[0134] CT i This indicates the current coiling temperature of the target rolled steel grade corresponding to the specified number;

[0135] C Apt1i This represents the adaptive coefficient for the target rolled steel grade corresponding to the specified number.

[0136] As an alternative implementation, the transition temperature is calculated using the transition temperature model in the temperature control model;

[0137] The transition temperature model specifically includes:

[0138] ∆CT=f(C V CT i CT i+1 )

[0139] in,

[0140] ∆CT represents the temperature of the transition section;

[0141] C V Indicates the temperature compensation value;

[0142] CT i With CT i+1 These represent the current coiling temperatures of two adjacent target rolled steel grades.

[0143] As an alternative implementation, the transition length is calculated using the transition segment length model in the temperature control model;

[0144] The transition segment length model specifically includes:

[0145] ∆l=f(b) l ,P,∆CT)

[0146] in,

[0147] ∆l represents the transition length;

[0148] b l Indicates the length of the equipment's inertia during operation;

[0149] P represents the shear point tracking position;

[0150] ∆CT represents the temperature of the transition section.

[0151] As an alternative implementation, the calculation module 200 determines the type of the shear point based on the PDI setting value.

[0152] As an alternative implementation, the types of shear points in the calculation module 200 include:

[0153] The pseudo-virtual shearing point is used as an identifier for temperature control, transition control, and cutting position between two adjacent target rolled steel grades within the same coil;

[0154] True / virtual shearing points are used as markers for temperature control, transition control, and cutting positions between different coiled steel strips.

[0155] The control device provided in this embodiment enables the coiling temperature hit rate of low-temperature coils to be controlled at over 80%, eliminating the phenomenon of strip steel flattening defects and automatic uncoiling when producing different steel grades using the headless rolling mode, ensuring continuous production of the hot rolling line, and improving the strip steel production qualification rate and production efficiency.

[0156] Example 3

[0157] Based on the same inventive concept, Embodiment 3 of the present invention provides an electronic device, as shown in the appendix. Figure 5 As shown, it includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. When the processor 302 executes the program, it implements the steps of the above-described temperature control method for strip steel in the endless rolling mode.

[0158] Among them, Figure 5 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 306 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.

[0159] Example 4

[0160] Based on the same inventive concept, Embodiment 4 of the present invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described method for temperature control of strip steel in the headless rolling mode.

[0161] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0162] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0163] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0164] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0165] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0166] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the electronic device according to embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0167] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of the present invention, improve and implement this solution in combination with their own capabilities. Some typical well-known structures or methods should not be obstacles for those skilled in the art to implement the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed by the present invention should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for temperature control of strip steel in endless rolling mode, characterized in that, The temperature control method includes: Identify n target rolled steel grades of the strip; where n is 2 or 3; the target rolled steel grades include cold-formed high-strength steel and hot-formed high-strength steel; Obtain the target rolling parameters corresponding to each target rolled steel grade, establish a temperature control model based on the target rolling parameters, and calculate the transition temperature and transition length between two adjacent steel grades through the temperature control model; The target rolling parameters include target rolling length, target coiling temperature, rolling speed, and cooling water volume; The target winding temperature is calculated using the winding temperature model in the temperature control model. The winding temperature model specifically includes: CT iset =f(l i ,h q ,V,Q i ,CT i ,C Apt1i ) in, i represents the number of each target rolled steel grade; CT iset This indicates the target coiling temperature set for the target rolled steel grade corresponding to the specified number; l i Indicates the target rolling length; V represents the rolling speed; Q i This indicates the current cooling water volume for the target rolled steel grade corresponding to the specified number; CT i This indicates the current coiling temperature of the target rolled steel grade corresponding to the specified number; C Apt1i This represents the adaptive coefficient for the target rolled steel grade corresponding to the specified number; The transition section temperature is calculated using the transition section temperature model in the temperature control model. The transition temperature model specifically includes: ∆CT=f(C V ,CT i ,CT i+1 ) in, ∆CT represents the temperature of the transition section; C V Indicates the temperature compensation value; CT i With CT i+1 These represent the current coiling temperatures of two adjacent target rolled steel grades; The transition length is calculated using the transition segment length model in the temperature control model. The transition segment length model specifically includes: ∆l=f(b l ,P,∆CT) in, ∆l represents the transition length; b l Indicates the length of the equipment's inertia during operation; P represents the shear point tracking position; ∆CT represents the temperature of the transition section.

2. The method for temperature control of strip steel in the endless rolling mode as described in claim 1, characterized in that, The method further includes determining the type of the shear point based on the PDI setting value.

3. The method for temperature control of strip steel in the endless rolling mode as described in claim 2, characterized in that: The types of shear points include: The pseudo-virtual shearing point is used as an identifier for temperature control, transition control, and cutting position between two adjacent target rolled steel grades within the same coil; True / virtual shearing points are used as markers for temperature control, transition control, and cutting positions between different coiled steel strips.

4. A temperature control device for strip steel in endless rolling mode, characterized in that, The temperature control device includes: The identification module is used to identify n target rolled steel grades of the strip; wherein the value of n is 2 or 3; the target rolled steel grades include cold-formed high-strength steel and hot-formed high-strength steel; The calculation module is used to obtain the target rolling parameters corresponding to each target rolled steel grade, establish a temperature control model based on the target rolling parameters, and calculate the transition temperature and transition length between two adjacent steel grades through the temperature control model. The correction module is used to iteratively correct the transition temperature and transition length using the temperature control model to obtain the target transition temperature and target transition length. The target rolling parameters used by the calculation module include target rolling length, target coiling temperature, rolling speed, and cooling water volume. The target winding temperature used by the calculation module is calculated through the winding temperature model in the temperature control model. The winding temperature model specifically includes: CT iset =f(l i ,h q ,V,Q i ,CT i ,C Apt1i ) in, i represents the number of each target rolled steel grade; CT iset This indicates the target coiling temperature set for the target rolled steel grade corresponding to the specified number; l i Indicates the target rolling length; V represents the rolling speed; Q i This indicates the current cooling water volume for the target rolled steel grade corresponding to the specified number; CT i This indicates the current coiling temperature of the target rolled steel grade corresponding to the specified number; C Apt1i This represents the adaptive coefficient for the target rolled steel grade corresponding to the specified number; The transition section temperature is calculated using the transition section temperature model in the temperature control model. The transition temperature model specifically includes: ∆CT=f(C V ,CT i ,CT i+1 ) in, ∆CT represents the temperature of the transition section; C V Indicates the temperature compensation value; CT i With CT i+1 These represent the current coiling temperatures of two adjacent target rolled steel grades; The transition length is calculated using the transition segment length model in the temperature control model. The transition segment length model specifically includes: ∆l=f(b l ,P,∆CT) in, ∆l represents the transition length; b l Indicates the length of the equipment's inertia during operation; P represents the shear point tracking position; ∆CT represents the temperature of the transition section.

5. 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 program, it implements the steps of the method as described in any one of claims 1-3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1-3.

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