Method, device and electronic equipment for controlling head thickness deviation of hot continuous rolling strip steel

Abstract

The application relates to the technical field of steel rolling, and discloses a hot continuous rolling strip head thickness deviation control method and device and electronic equipment. The method comprises the following steps: acquiring an actual head thickness value of a current strip in a hot continuous rolling mill rolling process and a target head thickness value of the current strip; determining a head thickness deviation value of the current strip according to the actual head thickness value and the target head thickness value; acquiring an actual rolling force of the current strip and a calculated rolling force of the current strip; determining a rolling force deviation value of the current strip according to the actual rolling force and the calculated rolling force; and determining a target set rolling force of a next coil of the current strip according to the head thickness deviation value and the rolling force deviation value. The technical scheme disclosed by the application can effectively improve the strip head thickness deviation problem caused by the rolling force setting calculation deviation, reduce the thickness out-of-tolerance occurrence rate, improve the product thickness control precision and the yield rate.

Description

Technical Field

[0001] This application relates to the field of steel rolling technology, and discloses a method, device and electronic equipment for controlling the thickness deviation of the head of hot strip. Background Technology

[0002] AGC (Automatic Gauge Control) technology in hot strip mills is the most effective means of controlling strip thickness, and it boasts extremely high control precision. However, AGC control can only be activated after the thickness gauge detects the actual strip thickness, and since there is a certain distance between the last stand of the finishing mill and the thickness gauge, AGC control cannot control the thickness within a certain range of the strip head. The level of strip thickness control in this part is determined by the initial setting accuracy of the mill roll gap. The setting accuracy of the mill roll gap mainly depends on the setting accuracy of the rolling force. Because numerous process factors affect the rolling force, and many of these factors change continuously during production, with some changes being unmonitorable, deviations in the rolling force setting are inevitable, ultimately leading to a deviation between the strip head thickness and the target value.

[0003] However, the existing hot strip rolling force setting and self-learning methods, although they take into account the strip thickness deviation factor, are also affected by other process factors and often cannot respond directly and quickly to the thickness deviation, resulting in frequent occurrences of strip head thickness deviation problems. Summary of the Invention

[0004] This application relates to the field of steel rolling technology, and discloses a method, device, and electronic equipment for controlling the head thickness deviation of hot-rolled strip. It can effectively improve the problem of strip head thickness deviation caused by calculation errors in rolling force settings.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to one aspect of the embodiments of this application, a method for controlling the head thickness deviation of hot-rolled strip is provided. The method includes: acquiring the actual head thickness value and the target head thickness value of the current strip during the rolling process of a hot-rolled mill; determining the head thickness deviation value of the current strip based on the actual head thickness value and the target head thickness value; acquiring the actual rolling force and the calculated rolling force of the current strip; determining the rolling force deviation value of the current strip based on the actual rolling force and the calculated rolling force; and determining the target set rolling force for the next coil of strip based on the head thickness deviation value and the rolling force deviation value.

[0007] In one embodiment of this application, based on the foregoing scheme, determining the head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value includes: calculating the difference between the actual head thickness value and the target head thickness value as the head thickness deviation value of the current strip steel.

[0008] In one embodiment of this application, based on the foregoing scheme, determining the current strip rolling force deviation value according to the actual rolling force and the calculated rolling force includes: calculating the difference between the calculated rolling force and the actual rolling force as the current strip rolling force deviation value.

[0009] In one embodiment of this application, based on the aforementioned scheme, determining the target set rolling force of the next coil of the current strip according to the head thickness deviation value and the rolling force deviation value includes: obtaining the initial set rolling force of the next coil of the current strip; if the head thickness deviation value and the rolling force deviation value meet preset conditions, then adjusting the initial set rolling force of the next coil of the current strip to obtain the target set rolling force of the next coil of the current strip; the preset conditions include: the head thickness deviation value of the current strip is greater than 0, and the rolling force deviation value of the current strip is greater than 0; or, the head thickness deviation value of the current strip is less than 0, and the rolling force deviation value of the current strip is less than 0.

[0010] In one embodiment of this application, based on the aforementioned scheme, adjusting the initial set rolling force of the next coil of the current strip to obtain the target set rolling force of the next coil of the current strip includes: determining the rolling force compensation coefficient of the next coil of the current strip based on the head thickness deviation value and the rolling force deviation value; and determining the target set rolling force of the next coil of the current strip based on the initial set rolling force and the rolling force compensation coefficient.

[0011] In one embodiment of this application, based on the foregoing scheme, the rolling force compensation coefficient is calculated using the following formula:

[0012]

[0013] Where δ is the rolling force compensation coefficient, G is the gain coefficient, F1 is the calculated rolling force of the current strip, F2 is the actual rolling force of the current strip, k1, k2, and k3 are adjustment coefficients, Δh is the head thickness deviation value, and h max This represents the upper limit of the head thickness deviation.

[0014] In one embodiment of this application, based on the foregoing scheme, the target rolling force is calculated using the following formula:

[0015] F4 = F3 * (1 + δ)

[0016] Where F4 is the target rolling force of the next coil of strip after the current strip, F3 is the initial rolling force of the next coil of strip after the current strip, and δ is the rolling force compensation coefficient.

[0017] In one embodiment of this application, based on the foregoing scheme, the adjustment coefficient k1 = 0.75, the adjustment coefficient k2 = -2.375, and the adjustment coefficient k3 = 2.265.

[0018] According to one aspect of the embodiments of this application, a control device for the head thickness deviation of hot-rolled strip is provided. The device includes: a first acquisition unit, configured to acquire the actual head thickness value and the target head thickness value of the current strip during the rolling process of a hot-rolling mill; a first determination unit, configured to determine the head thickness deviation value of the current strip based on the actual head thickness value and the target head thickness value; a second acquisition unit, configured to acquire the actual rolling force and the calculated rolling force of the current strip; a second determination unit, configured to determine the rolling force deviation value of the current strip based on the actual rolling force and the calculated rolling force; and a third determination unit, configured to determine the target set rolling force for the next coil of strip based on the head thickness deviation value and the rolling force deviation value.

[0019] In the technical solution proposed in this application, the actual head thickness value and the target head thickness value of the current strip are obtained during the rolling process of the hot strip mill. Based on the actual head thickness value and the target head thickness value, the head thickness deviation value of the current strip is determined. The actual rolling force and the calculated rolling force of the current strip are obtained. Based on the actual rolling force and the calculated rolling force, the rolling force deviation value of the current strip is determined. Based on the head thickness deviation value and the rolling force deviation value, the target set rolling force for the next coil of strip is determined. The technical solution proposed in this application can effectively improve the problem of strip head thickness deviation caused by the calculation deviation of the rolling force setting.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0022] Figure 1 A flowchart of a method for controlling the head thickness deviation of hot-rolled strip in an embodiment of this application is shown;

[0023] Figure 2 This diagram illustrates the maximum thickness deviation of the strip head before improvement in Embodiment 1 of this application.

[0024] Figure 3 This diagram illustrates the maximum thickness deviation of the strip head before improvement in Embodiment 1 of this application.

[0025] Figure 4 This diagram illustrates the maximum thickness deviation of the strip head before the improvement in Embodiment 2 of this application;

[0026] Figure 5 This diagram illustrates the maximum thickness deviation of the strip head before the improvement in Embodiment 2 of this application;

[0027] Figure 6 A block diagram of a control device for the head thickness deviation of hot-rolled strip steel according to an embodiment of this application is shown;

[0028] Figure 7 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0030] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0031] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0032] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0033] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0035] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0036] Figure 1 A flowchart of a method for controlling the head thickness deviation of hot-rolled strip in an embodiment of this application is shown.

[0037] like Figure 1 As shown, the method for controlling the thickness deviation at the head of the hot-rolled strip includes at least steps 110 to 150.

[0038] The following will be about Figure 1 Steps 110 to 150 are described in detail below:

[0039] In step 110, the actual head thickness value of the current strip and the target head thickness value of the current strip are obtained during the rolling process of the hot strip mill.

[0040] In this application, the actual head thickness value and the target head thickness value of the current strip can be obtained through the secondary control system in the hot strip production line. The secondary control system can be a PLC control system in the hot strip production line.

[0041] Continue to refer to Figure 1 In step 120, the head thickness deviation value of the current strip is determined based on the actual head thickness value and the target head thickness value.

[0042] In one embodiment, determining the head thickness deviation value of the current strip based on the actual head thickness value and the target head thickness value includes: calculating the difference between the actual head thickness value and the target head thickness value as the head thickness deviation value of the current strip.

[0043] In this application, the thickness of hot-rolled strip is one of the key quality control indicators. When the strip thickness deviation exceeds the control standard, it is called thickness deviation. When strip thickness deviation occurs, the excess portion generally needs to be cut off, which not only affects the yield and causes economic losses, but also increases process costs. In particular, as downstream processes and users continue to demand higher precision in product dimensional control, the control standards for thickness deviation are becoming increasingly stringent.

[0044] The difference between the actual head thickness and the target head thickness of the current strip can be calculated to determine the head thickness deviation. By judging whether the head thickness deviation exceeds the set thickness deviation range, it can be determined whether the current strip has a thickness deviation. If the head thickness deviation exceeds the set thickness deviation range, the current strip is determined to have a thickness deviation. If the current strip has a thickness deviation, it can be cut off to eliminate strips with a large difference between the actual thickness and the target thickness.

[0045] Continue to refer to Figure 1 In step 130, the actual rolling force of the current strip and the calculated rolling force of the current strip are obtained.

[0046] In this application, the actual rolling force of the current strip can be obtained through the secondary control system in the hot strip mill production line. Based on the rolling parameters of the hot strip mill, the calculated rolling force of the current strip can be calculated using the rolling force calculation model in the secondary control system of the hot strip mill production line. The calculated rolling force of the current strip can be understood as the theoretical rolling force of the current strip during the rolling process under the current operating conditions of the hot strip mill. The rolling parameters of the hot strip mill include at least one or more of the following: front and rear tension, rolling temperature, roll diameter, and strip width. They may also include rolling parameters that may affect the rolling of the strip, such as flattening radius, deformation speed, and tension.

[0047] Continue to refer to Figure 1 In step 140, the rolling force deviation value of the current strip is determined based on the actual rolling force and the calculated rolling force.

[0048] In one embodiment, determining the current strip's rolling force deviation value based on the actual rolling force and the calculated rolling force includes: calculating the difference between the calculated rolling force and the actual rolling force as the current strip's rolling force deviation value.

[0049] In this application, the difference between the actual rolling force of the current strip and the calculated rolling force of the current strip can be calculated to determine the rolling force deviation value of the current strip. By judging whether the rolling force deviation value of the current strip exceeds the set rolling force deviation value range, it can be determined whether the actual rolling force of the current strip reaches the calculated rolling force of the current strip. If the actual rolling force of the current strip does not reach the calculated rolling force, the rolling force of the next coil of strip needs to be appropriately adjusted so that the actual rolling force of the next coil of strip reaches the calculated rolling force of the next coil of strip.

[0050] Continue to refer to Figure 1 In step 150, the target set rolling force for the next coil of the current strip is determined based on the head thickness deviation value and the rolling force deviation value.

[0051] In one embodiment, determining the target set rolling force of the next coil of the current strip based on the head thickness deviation value and the rolling force deviation value includes: obtaining the initial set rolling force of the next coil of the current strip; if the head thickness deviation value and the rolling force deviation value meet preset conditions, adjusting the initial set rolling force of the next coil of the current strip to obtain the target set rolling force of the next coil of the current strip; the preset conditions include: the head thickness deviation value of the current strip is greater than 0, and the rolling force deviation value of the current strip is greater than 0; or, the head thickness deviation value of the current strip is less than 0, and the rolling force deviation value of the current strip is less than 0.

[0052] In this application, the initial rolling force of the next coil of the current strip can be obtained through the secondary control system in the hot strip production line. If the head thickness deviation value of the current strip and the rolling force of the current strip meet the preset conditions, the initial rolling force of the next coil of the current strip is adjusted to obtain the target rolling force of the next coil of the current strip.

[0053] If the thickness deviation at the head of the current strip is greater than 0, and the rolling force deviation of the current strip is also greater than 0, the initial rolling force of the next coil of the current strip will be adjusted. This is because if the thickness deviation at the head of the current strip is greater than 0, and the rolling force deviation of the current strip is also greater than 0, according to the self-learning method in the existing technology, without considering the thickness deviation, the rolling force setting will assume that the calculated rolling force of the rolling force model is higher than the actual rolling force. This will further reduce the initial rolling force of the next coil of the current strip, making it impossible to eliminate the positive thickness deviation, and may even cause the next coil of the current strip to have a larger positive thickness deviation.

[0054] If the thickness deviation of the current strip head is less than 0 and the rolling force deviation of the current strip is less than 0, the initial rolling force of the next coil of the current strip will be adjusted. This is because if the thickness deviation of the current strip head is less than 0, and the rolling force deviation of the current strip is also less than 0, according to the self-learning method in the existing technology, without considering the thickness deviation, the rolling force setting will assume that the calculated rolling force of the rolling force model is less than the actual rolling force. This will further increase the initial rolling force of the next coil of the current strip, making it impossible to eliminate the negative thickness deviation, and may even cause the next coil of the current strip to have a larger negative thickness deviation.

[0055] After determining that the head thickness deviation and rolling force deviation of the current strip meet the preset conditions, the initial rolling force of the next coil of the current strip is adjusted to obtain the target rolling force of the next coil of the current strip.

[0056] That is, in one embodiment, adjusting the initial set rolling force of the next coil of the current strip to obtain the target set rolling force of the next coil of the current strip includes: determining the rolling force compensation coefficient of the next coil of the current strip based on the head thickness deviation value and the rolling force deviation value; and determining the target set rolling force of the next coil of the current strip based on the initial set rolling force and the rolling force compensation coefficient.

[0057] In this application, a reference rolling force deviation value for the current strip can be calculated based on the current strip head thickness deviation value and the current strip rolling force deviation value. The reference rolling force deviation value for the current strip can be used as the initial adjustment rolling force for the next coil of strip. Based on the reference rolling force deviation value for the current strip, the initial setting rolling force for the next coil of strip can be adjusted, thereby obtaining the target setting rolling force for the next coil of strip.

[0058] In one embodiment, the rolling force compensation coefficient is calculated using the following formula:

[0059]

[0060] Where δ is the rolling force compensation coefficient, G is the gain coefficient, F1 is the calculated rolling force of the current strip, F2 is the actual rolling force of the current strip, k1, k2, and k3 are adjustment coefficients, Δh is the head thickness deviation value, and h max This represents the upper limit of the head thickness deviation.

[0061] In this application, the gain coefficient can range from 0.8 to 1.2, and the upper limit of the head thickness deviation can range from 200 to 300 μm. The specific values ​​of the gain coefficient and the upper limit of the head thickness deviation can be set according to actual needs and are not limited here.

[0062] In this application, the rolling force compensation coefficient of the next coil of the current strip can be calculated based on the initial adjusted rolling force of the next coil of the current strip and the calculated rolling force of the current strip. The rolling force compensation coefficient is used to compensate and adjust the initial set rolling force of the next coil of the current strip to obtain the target set rolling force of the next coil of the current strip after compensation and adjustment.

[0063] In one embodiment, the adjustment coefficient k1 = 0.75, the adjustment coefficient k2 = -2.375, and the adjustment coefficient k3 = 2.265.

[0064] In this application, preferably, the adjustment coefficients k1, k2, and k3 are 0.75, -2.375, and 2.265, respectively.

[0065] The function of adjustment coefficients k1, k2, and k3 is to make the adjustment range of the next coil of strip more smooth, so as to prevent the adjustment range of the rolling force of the next coil of strip from being too large and causing other production problems. The specific values ​​of adjustment coefficients k1, k2, and k3 can be set according to actual needs and are not restricted here.

[0066] In one implementation, the target rolling force is calculated using the following formula:

[0067] F4 = F3 * (1 + δ)

[0068] Where F4 is the target rolling force of the next coil of strip after the current strip, F3 is the initial rolling force of the next coil of strip after the current strip, and δ is the rolling force compensation coefficient.

[0069] In this application, the target set rolling force of the next coil of the current strip can be calculated based on the rolling force compensation coefficient of the next coil of the current strip and the initial set rolling force of the next coil of the current strip.

[0070] The one or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0071] The technical solution proposed in this application can effectively improve the problem of strip head thickness deviation caused by rolling force setting error by improving the accuracy of rolling force setting, reduce the occurrence rate of thickness deviation, and improve the product thickness control accuracy and yield.

[0072] To enable those skilled in the art to more readily understand this application, reference will be made below. Figures 2-5 This application will be illustrated with specific embodiments.

[0073] Figure 2 A schematic diagram showing the maximum thickness deviation of the strip head before the improvement in Embodiment 1 of this application is shown.

[0074] Figure 3 A schematic diagram showing the maximum thickness deviation of the strip head before the improvement in Embodiment 1 of this application is shown.

[0075] Figure 4 A schematic diagram showing the maximum thickness deviation of the strip head before the improvement in Embodiment 2 of this application is shown.

[0076] Figure 5 A schematic diagram showing the maximum thickness deviation of the strip head before the improvement in Embodiment 2 of this application is shown.

[0077] Example 1

[0078] It is applied to the production process of hot-dip galvanized base material with a thickness of 2.5mm to 3.5mm on a 2250 hot-rolling production line in a certain factory. The gain coefficient G is 0.9, and the standard range of thickness deviation of hot-dip galvanized base material is -60μm to 60μm.

[0079] The maximum thickness deviation of the strip head before applying the technical solution proposed in this application is as follows: Figure 2 As shown, for reference Figure 2 Calculations show that among the 32 rolls of hot-dip galvanized steel strip, the average thickness deviation at the head of the strip is -64μm, and the number of strips with excessive thickness is 15 rolls, which is 46.8% of the total number of strips.

[0080] The maximum thickness deviation of the strip head after applying the technical solution proposed in this application is as follows: Figure 3 As shown, for reference Figure 3 Calculations show that among the 35 rolls of hot-dip galvanized steel strip, the average thickness deviation at the head of the strip is -39μm, and the number of strips with excessive thickness is 5 rolls, which is 14.2% of the total number of strips.

[0081] The comparison shows that the average thickness deviation of the strip head after the improvement is reduced by about 39% compared with that before the improvement, and the ratio of strips with thickness deviation to the total number of strips after the improvement is reduced by about 69.6% compared with that before the improvement.

[0082] Example 2

[0083] It is applied to the production process of hot-dip galvanized base material with a thickness of 2.0mm to 3.0mm on a 1580 hot rolling production line in a certain factory. The gain coefficient G is 1.0, and the standard range of thickness deviation of hot-dip galvanized base material is -60μm to 60μm.

[0084] The maximum thickness deviation of the strip head before applying the technical solution proposed in this application is as follows: Figure 4 As shown, for reference Figure 4 Calculations show that among the 35 rolls of hot-dip galvanized steel strip, the average thickness deviation at the head of the strip is -51μm, and the number of strips with excessive thickness is 9 rolls, which is 25.7% of the total number of strips.

[0085] The maximum thickness deviation of the strip head after applying the technical solution proposed in this application is as follows: Figure 5 As shown, for reference Figure 5 Calculations show that in 32 rolls of hot-dip galvanized steel strip, the average thickness deviation at the head of the strip is -24μm, and the number of strips with excessive thickness is 2 rolls, which is 6.2% of the total number of strips.

[0086] The comparison shows that the average thickness deviation of the strip head after the improvement is reduced by about 52.9% compared with that before the improvement, and the ratio of strips with thickness deviation to the total number of strips after the improvement is reduced by about 75.8% compared with that before the improvement.

[0087] In summary, the technical solution proposed in this application can effectively improve the problem of strip head thickness deviation caused by the calculation deviation of rolling force setting, and reduce the occurrence rate of thickness deviation.

[0088] The following describes an embodiment of the apparatus described in this application, which can be used to execute the method for controlling the head thickness deviation of hot-rolled strip steel in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method for controlling the head thickness deviation of hot-rolled strip steel described above in this application.

[0089] Figure 6 A block diagram of a device for controlling the thickness deviation of the head of hot-rolled strip in an embodiment of this application is shown.

[0090] like Figure 6 As shown in the embodiment of this application, the hot-rolled strip head thickness deviation control device 600 includes: a first acquisition unit 601, a first determination unit 602, a second acquisition unit 603, a second determination unit 604, and a third determination unit 605.

[0091] The first acquisition unit 601 is used to acquire the actual head thickness value and the target head thickness value of the current strip during the rolling process of the hot strip mill; the first determination unit 602 is used to determine the head thickness deviation value of the current strip based on the actual head thickness value and the target head thickness value; the second acquisition unit 603 is used to acquire the actual rolling force and the calculated rolling force of the current strip; the second determination unit 604 is used to determine the rolling force deviation value of the current strip based on the actual rolling force and the calculated rolling force; and the third determination unit 605 is used to determine the target set rolling force of the next coil of strip based on the head thickness deviation value and the rolling force deviation value.

[0092] In some embodiments of this application, based on the foregoing scheme, the first determining unit 602 is configured to: calculate the difference between the actual head thickness value and the target head thickness value, as the head thickness deviation value of the current strip steel.

[0093] In some embodiments of this application, based on the foregoing scheme, the second determining unit 604 is configured to: calculate the difference between the calculated rolling force and the actual rolling force, as the rolling force deviation value of the current strip steel.

[0094] In some embodiments of this application, based on the foregoing scheme, the third determining unit 605 is configured to: obtain the initial set rolling force of the next coil of the current strip; if the head thickness deviation value and the rolling force deviation value meet preset conditions, then adjust the initial set rolling force of the next coil of the current strip to obtain the target set rolling force of the next coil of the current strip; the preset conditions include: the head thickness deviation value of the current strip is greater than 0, and the rolling force deviation value of the current strip is greater than 0; or, the head thickness deviation value of the current strip is less than 0, and the rolling force deviation value of the current strip is less than 0.

[0095] In some embodiments of this application, based on the foregoing scheme, the third determining unit 605 is further configured to: determine the rolling force compensation coefficient of the next coil of the current strip based on the head thickness deviation value and the rolling force deviation value; and determine the target set rolling force of the next coil of the current strip based on the initial set rolling force and the rolling force compensation coefficient.

[0096] In some embodiments of this application, based on the foregoing scheme, the third determining unit 605 is further configured to: calculate the rolling force compensation coefficient using the following formula:

[0097]

[0098] Where δ is the rolling force compensation coefficient, G is the gain coefficient, F1 is the calculated rolling force of the current strip, F2 is the actual rolling force of the current strip, k1, k2, and k3 are adjustment coefficients, Δh is the head thickness deviation value, and h max This represents the upper limit of the head thickness deviation.

[0099] In some embodiments of this application, based on the foregoing scheme, the third determining unit 605 is further configured to: calculate the target setting rolling force using the following formula:

[0100] F4 = F3 * (1 + δ)

[0101] Where F4 is the target rolling force of the next coil of strip after the current strip, F3 is the initial rolling force of the next coil of strip after the current strip, and δ is the rolling force compensation coefficient.

[0102] In some embodiments of this application, based on the foregoing scheme, the third determining unit 605 is further configured as follows: the adjustment coefficient k1 = 0.75, the adjustment coefficient k2 = 2.375, and the adjustment coefficient k3 = 2.265.

[0103] This application also provides a computer program product comprising computer instructions stored in a computer-readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform the hot-rolled strip head thickness deviation control method as described in any of the above embodiments.

[0104] This application also provides a computer-readable medium, which may be included in an electronic device or exist independently without being assembled into an electronic device. The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to implement the method for controlling the head thickness deviation of hot-rolled strip as described in any of the above embodiments.

[0105] This application also provides an electronic device, which includes one or more processors and one or more memories, wherein the one or more memories store at least one piece of program code, which is loaded and executed by the one or more processors to implement the method for controlling the head thickness deviation of hot strip steel as described in any of the above embodiments.

[0106] Figure 7 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.

[0107] It should be noted that, Figure 7 The computer system 700 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0108] like Figure 7 As shown, the computer system 700 includes a Central Processing Unit (CPU) 701, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 702 or programs loaded from storage portion 708 into Random Access Memory (RAM) 703, such as performing the methods described in the above embodiments. The RAM 703 also stores various programs and data required for system operation. The CPU 701, ROM 702, and RAM 703 are interconnected via a bus 704. An Input / Output (I / O) interface 705 is also connected to the bus 704.

[0109] The following components are connected to I / O interface 705: an input section 706 including a keyboard, mouse, etc.; an output section 707 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to I / O interface 705 as needed. A removable medium 711, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 710 as needed so that computer programs read from it can be installed into storage section 708 as needed.

[0110] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 709, and / or installed from removable medium 711. When the computer program is executed by central processing unit (CPU) 701, it performs various functions defined in the system of this application.

[0111] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0112] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0113] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0114] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0115] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, touch terminal, or network device, etc.) to execute the method according to the embodiments of this application.

[0116] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0117] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of this application, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0118] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method of controlling head thickness deviation of hot strip, characterized by, The method comprises: acquiring an actual head thickness value of a current strip steel in a hot continuous rolling mill group rolling process and a target head thickness value of the current strip steel; determining a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value; acquiring an actual rolling force of the current strip steel and a calculated rolling force of the current strip steel; determining a rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force; acquiring an initial set rolling force of a next coil of the current strip steel; if the head thickness deviation value and the rolling force deviation value satisfy a preset condition, determining a rolling force compensation coefficient of the next coil of the current strip steel according to the head thickness deviation value and the rolling force deviation value; and determining a target set rolling force of the next coil of the current strip steel according to the initial set rolling force and the rolling force compensation coefficient; the preset condition comprises: the head thickness deviation value of the current strip steel is greater than 0 and the rolling force deviation value of the current strip steel is greater than 0; or, the head thickness deviation value of the current strip steel is less than 0 and the rolling force deviation value of the current strip steel is less than 0; the rolling force compensation coefficient is calculated by the following formula: wherein, δ is a rolling force compensation coefficient, G is a gain coefficient, is a calculated rolling force of the current strip, is an actual rolling force of the current strip, , , is an adjustment coefficient, h is a head thickness deviation value, is a head thickness deviation upper limit value.

2. The method of claim 1, wherein, the determining of the head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value comprises: calculating a difference value of the actual head thickness value minus the target head thickness value as the head thickness deviation value of the current strip steel.

3. The method of claim 1, wherein, the determining of the rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force comprises: calculating a difference value of the calculated rolling force minus the actual rolling force as the rolling force deviation value of the current strip steel.

4. The method of claim 1, wherein, the target set rolling force is calculated by the following formula: wherein, setting a rolling force for a target of a next coil of strip steel from the current strip steel, setting an initial rolling force for a target of a next coil of strip steel from the current strip steel, δ is a rolling force compensation coefficient.

5. The method of claim 1, wherein, the adjustment factor = 0.75, the adjustment factor = -2.375, the adjustment factor = 2.

265.

6. A device for controlling the thickness deviation at the head of hot-rolled strip steel, characterized in that, the device comprises: a first acquiring unit configured to acquire an actual head thickness value of a current strip steel in a hot continuous rolling mill group rolling process and a target head thickness value of the current strip steel; a first determining unit configured to determine a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value; a second acquiring unit configured to acquire an actual rolling force of the current strip steel and a calculated rolling force of the current strip steel; a second determining unit configured to determine a rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force; a third determining unit configured to acquire an initial set rolling force of a next coil of the current strip steel; if the head thickness deviation value and the rolling force deviation value satisfy a preset condition, determine a rolling force compensation coefficient of the next coil of the current strip steel according to the head thickness deviation value and the rolling force deviation value; and determine a target set rolling force of the next coil of the current strip steel according to the initial set rolling force and the rolling force compensation coefficient; the preset condition comprises: the head thickness deviation value of the current strip steel is greater than 0 and the rolling force deviation value of the current strip steel is greater than 0; or, the head thickness deviation value of the current strip steel is less than 0 and the rolling force deviation value of the current strip steel is less than 0; The rolling force compensation coefficient is calculated by the following formula: wherein δ is a rolling force compensation coefficient, G is a gain coefficient, is a calculated rolling force of the current strip, is an actual rolling force of the current strip, , , is an adjustment coefficient, h is a head thickness deviation value, is a head thickness deviation upper limit value.

7. An electronic device, comprising: The electronic device includes one or more processors and one or more memories having at least one program code stored therein, and the at least one program code is loaded and executed by the one or more processors to implement the control method for head thickness deviation of hot strip as claimed in any one of claims 1 to 5.

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