Strip steel thickness control method and device, equipment, storage medium and program product

Abstract

The invention discloses a strip steel thickness control method, device and equipment, a storage medium and a program product, and relates to the technical field of metal processing. The method comprises the steps that under the condition that a hot continuous rolling unit rolls a strip steel tail area at a preset first conveying speed and tailings of a first rack in the hot continuous rolling unit are discarded, the thickness deviation value of a second rack in the hot continuous rolling unit is obtained, the hot continuous rolling unit comprises a plurality of racks, and different racks correspond to different rolling sequences; the second rack is the next rack of the first rack; according to the thickness deviation value of the second rack, the roll gap compensation amount of the second rack is determined, and the change direction of the roll gap compensation amount is opposite to that of the thickness deviation value; and the screw-down roll gap compensation amount of the second rack in the hot continuous rolling unit is controlled. According to the embodiment of the invention, the thickness of the tail of the strip steel can be accurately controlled to the target value, so that the production quality of the strip steel is improved.

Description

Technical Field

[0001] The present application belongs to the field of metal processing technology, and in particular, relates to a strip thickness control method, device, equipment, storage medium and program product. Background Art

[0002] In the production process of hot-rolled strip steel, when the tail of the strip steel passes through a frame, the tension of the next frame will drop to 0. However, in the existing technology under the Radio Frequency Automatic Gain Control (RF-AGC) mode, the thickness of the strip steel at the outlet of the next frame will increase, affecting the production quality of the strip steel, and may also cause difficulties in the subsequent processing process and reduce production efficiency. Summary of the invention

[0003] The embodiments of the present application provide a strip thickness control method, device, equipment, storage medium and program product, which can accurately control the thickness of the tail of the strip to a target value, thereby improving the production quality of the strip.

[0004] In a first aspect, an embodiment of the present application provides a method for controlling the thickness of a strip steel, the method comprising:

[0005] When the hot rolling mill group rolls the tail area of ​​the strip at a preset first conveying speed and a first stand in the hot rolling mill group has tail casting, a thickness deviation of a second stand in the hot rolling mill group is obtained, wherein the hot rolling mill group includes a plurality of stands, different stands correspond to different rolling sequences, and the second stand is the next stand of the first stand;

[0006] Determining a roll gap compensation amount of the second frame according to the thickness deviation amount of the second frame, wherein the roll gap compensation amount changes in the opposite direction to the thickness deviation amount;

[0007] The second stand in the hot rolling mill group is controlled to press down the roll gap compensation amount.

[0008] In a second aspect, an embodiment of the present application provides a strip thickness control device, the device comprising:

[0009] a first acquisition module, configured to acquire a thickness deviation of a second rack in the hot rolling mill group when the hot rolling mill group rolls the tail area of ​​the strip at a preset first conveying speed and a first rack in the hot rolling mill group has tail casting, wherein the hot rolling mill group includes a plurality of racks, different racks correspond to different rolling sequences, and the second rack is the next rack of the first rack;

[0010] A determination module, configured to determine a roll gap compensation amount of the second frame according to a thickness deviation amount of the second frame, wherein a change direction of the roll gap compensation amount is opposite to a change direction of the thickness deviation amount;

[0011] The first control module is used to control the second stand in the hot rolling mill group to press down the roll gap compensation amount.

[0012] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the strip thickness control method as described in any one of the above is implemented.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the strip thickness control method as described in any one of the above is implemented.

[0014] In a fifth aspect, an embodiment of the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes any one of the strip thickness control methods described above.

[0015] The strip thickness control method, device, equipment, storage medium and program product of the embodiment of the present application can obtain the thickness deviation of the second frame in the hot rolling mill when the hot rolling mill rolls the tail area of ​​the strip at a preset first transmission speed and the first frame in the hot rolling mill has tail throwing, the hot rolling mill includes multiple frames, different frames correspond to different rolling sequences, and the second frame is the next frame of the first frame; according to the thickness deviation of the second frame, the roll gap compensation of the second frame is determined, and the change direction of the roll gap compensation is opposite to that of the thickness deviation; the second frame in the hot rolling mill is controlled to press down the roll gap compensation. In this way, in the embodiment of the present application, when the first frame in the hot rolling mill has tail throwing, the roll gap compensation of the second frame in the hot rolling mill is pressed down to realize the strip tail thickness compensation control, and the thickness of the strip tail can be accurately controlled to the target value, thereby improving the strip production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 It is a schematic flow chart of a strip thickness control method provided in an embodiment of the present application;

[0018] Figure 2 Schematic diagram of the thickness of the tail of the strip without tail compensation provided in an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of the rolling force of the tail of the strip before the tail compensation provided by the embodiment of the present application is put into use;

[0020] Figure 4 is a band tail compensation control block diagram provided by an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of the rolling force at the tail after the tail compensation adjustment provided in the embodiment of the present application;

[0022] Figure 6 is a schematic structural diagram of a strip steel thickness control device provided in an embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0026] In the production process of hot-rolled strip steel, when the tail of the strip steel passes through a frame, the tension of the next frame will drop to 0. However, in the existing technology under the Radio Frequency Automatic Gain Control (RF-AGC) mode, the thickness of the strip steel at the outlet of the next frame will increase, affecting the production quality of the strip steel, and may also cause difficulties in the subsequent processing process and reduce production efficiency.

[0027] In order to solve the problems of the prior art, the embodiments of the present application provide a strip thickness control method, device, equipment, storage medium and program product. The strip thickness control method provided by the embodiments of the present application is first introduced below.

[0028] Figure 1 FIG. 1 is a flow chart of a strip thickness control method provided by an embodiment of the present application. Figure 1 As shown, a strip thickness control method may include the following steps S101 to S103:

[0029] S101, when the hot rolling mill group rolls the tail area of ​​the strip at a preset first conveying speed and the first stand in the hot rolling mill group has tail casting, obtaining a thickness deviation of a second stand in the hot rolling mill group, the hot rolling mill group includes a plurality of stands, different stands correspond to different rolling sequences, and the second stand is a stand next to the first stand;

[0030] S102, determining a roll gap compensation amount of the second frame according to a thickness deviation amount of the second frame, wherein a change direction of the roll gap compensation amount is opposite to a change direction of the thickness deviation amount;

[0031] S103, controlling the second stand in the hot rolling mill to press down the roll gap compensation amount.

[0032] The strip thickness control method of the embodiment of the present application can obtain the thickness deviation of the second frame in the hot rolling mill when the hot rolling mill rolls the tail area of ​​the strip at a preset first transmission speed and the first frame in the hot rolling mill has tail casting, the hot rolling mill includes multiple frames, different frames correspond to different rolling sequences, and the second frame is the next frame of the first frame; according to the thickness deviation of the second frame, the roll gap compensation of the second frame is determined, and the change direction of the roll gap compensation is opposite to that of the thickness deviation; the second frame in the hot rolling mill is controlled to press down the roll gap compensation. In this way, in the embodiment of the present application, when the first frame in the hot rolling mill has tail casting, the roll gap compensation of the second frame in the hot rolling mill is pressed down to realize the strip tail thickness compensation control, and the thickness of the strip tail can be accurately controlled to the target value, thereby improving the strip production quality.

[0033] In S101, the hot rolling mill group includes a plurality of stands, and different stands correspond to different rolling sequences. Exemplarily, the hot rolling mill group can be a 7-stand hot rolling mill group, where stands 1 to 2 are rough rolling stands, whose main task is to significantly reduce the thickness of the rolled piece; stands 3 to 4 are intermediate stands, which are in the transition stage and further reduce the thickness and control the width; stands 5 to 7 are finishing stands, which accurately control the thickness, plate shape and surface quality.

[0034] The first stand may be a stand in the hot rolling mill where tail throwing occurs. Tail throwing refers to the operation of quickly throwing or removing the tail of the strip from the rolling mill when the strip rolling is nearly finished.

[0035] The second rack may be a rack next to the first rack.

[0036] The thickness deviation mentioned above may be the increase in thickness between the actual thickness of the strip and the target thickness.

[0037] In S102, the roll gap compensation amount may refer to the amount of adjustment made to the roll gap of the rolling mill in order to eliminate the thickness deviation. The roll gap compensation amount and the thickness deviation amount change in the opposite direction. For example, when the thickness deviation amount is positive (the actual thickness is greater than the target thickness), the roll gap compensation amount is negative (reducing the roll gap); when the thickness deviation amount is negative (the actual thickness is less than the target thickness), the roll gap compensation amount is positive (increasing the roll gap).

[0038] The roller gap compensation amount of the second frame is determined according to the thickness deviation of the second frame. Exemplarily, the roller gap compensation amount of the second frame can be calculated according to the following formula based on the thickness deviation of the second frame:

[0039]

[0040] Among them, DS TEC is the roller gap compensation, DH TEC is the thickness deviation, M is the rolling mill stiffness coefficient, and Q is the plasticity coefficient.

[0041] In S103, the above-mentioned control of the second stand in the hot rolling mill to press down the roll gap compensation amount can, for example, be controlling the second stand in the hot rolling mill to press down the roll gap compensation amount according to the pressing speed, and the pressing speed is used to characterize the pressing amount of the second stand per unit time.

[0042] As an implementation of the present application, in order to smooth the change of rolling force, before the above S103, the above method may further include:

[0043] Obtaining a pressing speed of the second rack, where the pressing speed is used to characterize the pressing amount of the second rack per unit time;

[0044] The above S103 may specifically include:

[0045] Control the second stand in the hot rolling mill to press down the roll gap compensation amount according to the pressing speed.

[0046] The above pressing speed can be used to characterize the pressing amount of the second rack per unit time.

[0047] The above-mentioned method of obtaining the pressing speed of the second frame can be, for example, to obtain the linear speed of the first frame at the moment of tail casting and the moving distance between the first frame and the second frame; the ratio of the moving distance to the linear speed is determined as the moving time of the strip from the first frame to the second frame; the ratio of the roll gap compensation amount to the moving time is determined as the pressing speed of the second frame. Alternatively, the linear speed of the first frame at the moment of tail casting and the moving distance between the first frame and the second frame can be obtained; the ratio of the moving distance to the linear speed is determined as the moving time of the strip from the first frame to the second frame; the ratio of the roll gap compensation amount to the moving time is determined as the initial speed of the second frame; and the product of the initial speed and the correction coefficient is determined as the pressing speed of the second frame.

[0048] In the embodiment of the present application, the pressing speed can be used to characterize the pressing amount of the second stand per unit time, and control the second stand in the hot rolling mill to press down the roll gap compensation amount according to the pressing speed. The coordinated control of the pressing speed and the roll gap compensation amount can smooth the change of rolling force and avoid sudden changes, thereby reducing vibration and impact during the rolling process and improving the stability of equipment operation.

[0049] In some embodiments, the obtaining of the pressing speed of the second rack may specifically include:

[0050] Obtaining the linear velocity of the first frame at the tail casting moment and the moving distance between the first frame and the second frame;

[0051] The ratio of the moving distance to the line speed is determined as the moving time of the strip from the first rack to the second rack;

[0052] The ratio of the roll gap compensation amount to the moving time is determined as the pressing speed of the second frame.

[0053] The above-mentioned moving time can be the ratio of the moving distance between the first frame and the second frame to the linear speed of the first frame at the tail casting moment.

[0054] The above-mentioned pressing speed can be the ratio of the roll gap compensation amount to the moving time.

[0055] In the embodiment of the present application, the pressing speed of the second frame can be accurately calculated through the linear speed of the first frame at the tail casting moment, the moving distance between the first frame and the second frame, and the roll gap compensation amount, so as to control the second frame in the hot rolling mill to press down the roll gap compensation amount according to the pressing speed, smooth the change of rolling force, and ensure the stability of equipment operation.

[0056] In some embodiments, the ratio of the roller gap compensation amount to the moving time is determined as the pressing speed of the second frame, which may specifically include:

[0057] The ratio of the roller gap compensation amount to the moving time is determined as the initial speed of the second frame;

[0058] The product of the initial speed and the correction coefficient is determined as the pressing speed of the second rack.

[0059] The above correction coefficient can be a coefficient used by the user to correct and adjust the initial speed of the second rack, and is used to adjust the initial speed of the second rack to meet the process requirements or maintain consistency. For example, if the initial speed of the second rack needs to be accelerated, the correction coefficient C>1 can be set; if the initial speed of the second rack needs to be slowed down, C<1 can be set.

[0060] In the embodiment of the present application, the ratio of the roller gap compensation amount to the movement time is determined as the initial speed of the second frame, and the product of the initial speed and the correction coefficient is determined as the pressing speed of the second frame. The initial speed of the second frame is adjusted by the correction coefficient to meet the process requirements or maintain consistency.

[0061] In some embodiments, the above S102 may specifically include:

[0062] According to the thickness deviation of the second frame, the roll gap compensation of the second frame is calculated according to the following formula:

[0063]

[0064] Among them, DS TEC is the roller gap compensation, DH TEC is the thickness deviation, M is the rolling mill stiffness coefficient, and Q is the plasticity coefficient.

[0065] The above-mentioned rolling mill stiffness coefficient is used to represent the stiffness characteristics of the rolling mill itself, and can be calculated from the ratio of the change in rolling force on both sides and the change in roll gap on both sides during the stiffness test.

[0066] The above-mentioned plasticity coefficient varies according to different steel grades and compositions. The plasticity coefficient of each steel grade is a variable value and is a characteristic of the strip steel itself.

[0067] In the embodiment of the present application, the roll gap compensation amount of the second stand can be accurately calculated based on the thickness deviation of the second stand, the rolling mill stiffness coefficient and the plasticity coefficient, thereby further improving the accuracy of the strip tail thickness compensation control.

[0068] When the tail thickness of the strip is rapidly reduced due to the input of tail compensation, the rolling force of the single stand will increase rapidly, causing the strip tail to deviate and the rolling state to change rapidly, which can easily cause the strip tail to swing or break. As another implementation of the present application, in order to effectively avoid the strip tail swinging or breaking, the above method may also include:

[0069] The hot rolling mill is controlled to roll the tail region of the strip at a preset second conveying speed, where the second conveying speed is greater than the first conveying speed, so as to increase the temperature of the tail region of the strip.

[0070] The above-mentioned conveying speed of the hot rolling mill group may refer to the speed at which the rolled product (such as steel plate, steel strip, etc.) is conveyed from one stand to the next stand in the hot rolling mill group during the hot rolling production process. The conveying speed is a key parameter in the hot rolling process, which directly affects the production efficiency, product quality and equipment operation stability. The conveying speed reflects the movement speed of the rolled product during the rolling process and is an important parameter in the rolling process.

[0071] The second transmission speed is greater than the first transmission speed.

[0072] In the embodiment of the present application, the hot rolling mill is controlled to roll the tail area of ​​the strip at a preset second transmission speed, wherein the second transmission speed is greater than the first transmission speed, which can not only increase the temperature of the tail of the strip, but also shorten the effective control time of the strip, and there is a certain delay in the control, so the control effect in the downstream will be reduced, so that the rapid increase of the rolling force at the tail is alleviated, that is, the rolling force at the tail of the strip is reduced, and the deviation of the center line is relatively improved, thereby effectively avoiding the tail of the strip from swinging or breaking.

[0073] In order to facilitate the understanding of the strip thickness control method in the embodiment of the present application, the actual application process of this strip thickness control method is described as follows:

[0074] Since the tension of the next stand (equivalent to the second stand) drops to 0 when the tail of the strip passes through a stand (equivalent to the first stand mentioned above), sufficient control is impossible in the RF-AGC mode alone, and the strip thickness at the exit of the next stand will increase. Figure 2 The figure shows the strip tail thickness without tail compensation. Figure 3 The figure shows the rolling force at the tail of the strip before the tail compensation is put into use.

[0075] In the embodiment of the present application, the tail thickness is controlled to the target value by intervention of the tail compensation, thereby improving the thickness accuracy of the finished product. Specifically, the tail compensation is given according to the secondary process computer, and a forced pressure is given to compensate the tail of the strip. Before the tail compensation is adjusted, the tail end compensation amount is calculated for the F2-F7 racks. Since the thickening amount of different racks is different, corresponding calculations need to be performed for each rack separately. The following formula shows the basic calculation formula for tail compensation:

[0076]

[0077] Among them, DStec is the tail end compensation amount (equivalent to the above-mentioned roll gap compensation amount), DHtec is the thickening amount (equivalent to the above-mentioned thickness deviation amount), M is the rolling mill stiffness (the stiffness characteristics of the rolling mill itself, the stiffness M is calculated by the ratio of the change in rolling force on both sides and the change in roll gap on both sides during the stiffness test), and Q is the plasticity coefficient (depending on different steel grades and different compositions, the plasticity coefficient of each steel grade is a variable value, which is the characteristic of the strip itself).

[0078] In some embodiments, the initial value of the calculation is sent down by the secondary process computer. After the set value is sent down, the primary computer reads the speed of the strip tail at the previous rack after the previous rack threw the steel, and determines the current rack pressing rate (equivalent to the above-mentioned pressing speed) based on the previous rack tail throwing speed, and uses the pressing rate as the slope of the pressing amount ramp generator, so as to achieve uniform pressing of the strip tail. Figure 4 The control block diagram with tail compensation is shown, where Vn-1 is the linear speed of the previous frame at the time of steel throwing, L is the moving distance between frames, tn-1 is the pre-calculated moving time between frames, an is the total tail end compensation (equivalent to the above-mentioned roll gap compensation), and Cn is the constant for the pressing speed of each frame (equivalent to the above-mentioned correction coefficient). When the TEC AGC switch is turned on, the secondary computer sends the basic value, and after calculation, the load calculation is performed on 6 frames. The slope of the pressing amount is determined according to the speed of the front frame at the moment of tail throwing, thereby determining the pressing amount and pressing time of a single frame. Figure 5 As shown, the rolling force at the tail is adjusted after the tail compensation.

[0079] In some embodiments, due to the effect of tail compensation, the tail of the strip will be sharply thinned, the actual rolling force of a single stand will increase sharply (such as 3000KN-4000KN), and the deviation of the tail will also change sharply. If it is not adjusted in time, it will cause the tail to swing or break, affecting the surface quality of the strip. In this regard, the compensation function starts when the previous stand throws the steel, and then the strip conveying speed is accelerated in the downstream stand, which can not only increase the temperature of the tail, but also shorten the effective control time of the strip. In addition, there is a certain delay in the control, so the control effect in the downstream will be reduced, so that the rapid increase of the tail rolling force is alleviated, that is, the tail rolling force is reduced, and the center line deviation is relatively improved.

[0080] On the basis of the existing conventional hot rolling line, this application can realize the tail compensation function by changing the shape of the tail roller gap, for example, adjusting the F2-F7 tail pressure roller gap of 100um-300um to the tail open roller gap of 20um-50um. At the same time, by accelerating the strip transmission speed, the temperature of the heated tail can be controlled to achieve the thickness within the customer's required range when the tail pressure compensates the open roller gap. Different specifications are divided into different hardness grades in L2, and different steel types are compensated to different degrees according to specifications and hardness grades, so as to achieve different adjustments according to different customer requirements. After testing, this application found that after the tail compensation adjusted the F2-F7 pressure roller gap of 100um-300um to the open roller gap of 20um, the tail temperature of the strip was increased by 20°C, and the rapid increase of the tail rolling force was alleviated, that is, the tail rolling force decreased, and the center line deviation was significantly improved.

[0081] Based on the strip thickness control method provided in the above embodiment, the present application also provides a specific implementation of a strip thickness control device. Please refer to the following embodiment.

[0082] like Figure 6 As shown, the strip thickness control device 600 provided in the embodiment of the present application may include the following modules: a first acquisition module 601 , a determination module 602 and a first control module 603 .

[0083] The first acquisition module 601 is used to acquire the thickness deviation of the second rack in the hot rolling mill group when the hot rolling mill group rolls the tail area of ​​the strip at a preset first conveying speed and the first rack in the hot rolling mill group has tail casting, wherein the hot rolling mill group includes a plurality of racks, and different racks correspond to different rolling sequences, and the second rack is the next rack of the first rack;

[0084] A determination module 602 is used to determine a roll gap compensation amount of the second frame according to the thickness deviation amount of the second frame, and the roll gap compensation amount and the thickness deviation amount change in opposite directions;

[0085] The first control module 603 is used to control the roll gap compensation amount of the second stand in the hot rolling mill group.

[0086] The strip thickness control device of the embodiment of the present application can obtain the thickness deviation of the second frame in the hot rolling mill when the hot rolling mill rolls the tail area of ​​the strip at a preset first transmission speed and the first frame in the hot rolling mill has tail throwing, the hot rolling mill includes multiple frames, different frames correspond to different rolling sequences, and the second frame is the next frame of the first frame; according to the thickness deviation of the second frame, the roll gap compensation of the second frame is determined, and the change direction of the roll gap compensation is opposite to that of the thickness deviation; the second frame in the hot rolling mill is controlled to press down the roll gap compensation. In this way, in the embodiment of the present application, when the first frame in the hot rolling mill has tail throwing, the roll gap compensation of the second frame in the hot rolling mill is pressed down to realize the strip tail thickness compensation control, and the thickness of the strip tail can be accurately controlled to the target value, thereby improving the strip production quality.

[0087] As an implementation of the present application, in order to smooth the change of rolling force, the above device 600 may further include:

[0088] A second acquisition module is used to acquire a pressing speed of the second rack, where the pressing speed is used to characterize the pressing amount of the second rack per unit time;

[0089] The first control module 603 is specifically used to control the second stand in the hot rolling mill group to press down the roll gap compensation amount according to the pressing speed.

[0090] In some embodiments, the second acquisition module may specifically include:

[0091] An acquisition unit, used for acquiring the linear velocity of the first frame at the tail casting moment and the moving distance between the first frame and the second frame;

[0092] A first determining unit, used to determine the ratio of the moving distance to the line speed as the moving time of the strip from the first frame to the second frame;

[0093] The second determining unit is used to determine the ratio of the roller gap compensation amount to the moving time as the pressing speed of the second frame.

[0094] In some embodiments, the second determining unit may specifically include:

[0095] A first determining subunit is used to determine the ratio of the roller gap compensation amount to the moving time as the initial speed of the second frame;

[0096] The second determining subunit is used to determine the product of the initial speed and the correction coefficient as the pressing speed of the second rack.

[0097] In some embodiments, the determination module 602 may be used to calculate the roll gap compensation amount of the second frame according to the thickness deviation of the second frame according to the following formula:

[0098]

[0099] Among them, DS TEC is the roller gap compensation, DH TEC is the thickness deviation, M is the rolling mill stiffness coefficient, and Q is the plasticity coefficient.

[0100] When the tail thickness of the strip is rapidly reduced due to the input of tail compensation, the rolling force of the single stand will increase rapidly, causing the strip tail to deviate and the rolling state to change rapidly, which can easily cause the strip tail to swing or break. As another implementation of the present application, in order to effectively avoid the strip tail swing or break, the above device 600 may also include:

[0101] The second control module is used to control the hot rolling mill to roll the tail area of ​​the strip at a preset second conveying speed, where the second conveying speed is greater than the first conveying speed to increase the temperature of the tail area of ​​the strip.

[0102] Figure 7 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0103] The electronic device may include a processor 701 and a memory 702 storing computer program instructions.

[0104] Specifically, the processor 701 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0105] The memory 702 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 702 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 702 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 702 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 702 is a non-volatile solid-state memory.

[0106] In certain embodiments, the memory 702 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0107] The processor 701 implements any one of the strip thickness control methods in the above embodiments by reading and executing computer program instructions stored in the memory 702 .

[0108] In one example, the electronic device may further include a communication interface 703 and a bus 710. Figure 7 As shown, the processor 701, the memory 702, and the communication interface 703 are connected via a bus 710 and communicate with each other.

[0109] The communication interface 703 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0110] Bus 710 includes hardware, software or both, and the parts of electronic equipment are coupled to each other.For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 710 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0111] The electronic device can execute the strip thickness control method in the embodiment of the present application, thereby realizing the combination Figure 1 and Figure 6 The invention discloses a method and device for controlling the thickness of a steel strip.

[0112] In addition, in combination with the strip thickness control method in the above embodiment, the embodiment of the present application can provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any one of the strip thickness control methods in the above embodiment is implemented.

[0113] In combination with the strip thickness control method in the above-mentioned embodiment, an embodiment of the present application may provide a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes any one of the strip thickness control methods as above.

[0114] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0115] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0116] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0117] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0118] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for controlling the thickness of a strip steel, characterized in that: include: When the hot rolling mill group rolls the tail area of ​​the strip at a preset first conveying speed and a first stand in the hot rolling mill group has tail casting, a thickness deviation of a second stand in the hot rolling mill group is obtained, wherein the hot rolling mill group includes a plurality of stands, different stands correspond to different rolling sequences, and the second stand is the next stand of the first stand; Determining a roll gap compensation amount of the second frame according to the thickness deviation amount of the second frame, wherein the roll gap compensation amount changes in the opposite direction to the thickness deviation amount; The second stand in the hot rolling mill group is controlled to press down the roll gap compensation amount.

2. The method according to claim 1, characterized in that Before controlling the second stand in the hot rolling mill group to press down the roll gap compensation amount, the method further includes: Acquire a pressing speed of the second frame, where the pressing speed is used to characterize the pressing amount of the second frame per unit time; The controlling the second stand in the hot rolling mill group to press down the roll gap compensation amount comprises: The second stand in the hot rolling mill group is controlled to press down the roll gap compensation amount according to the pressing speed.

3. The method according to claim 2, characterized in that The obtaining of the pressing speed of the second frame includes: Acquire the linear velocity of the first frame at the tail casting moment and the moving distance between the first frame and the second frame; The ratio of the moving distance to the line speed is determined as the moving time of the strip from the first frame to the second frame; The ratio of the roller gap compensation amount to the movement time is determined as the pressing speed of the second frame.

4. The method according to claim 3, characterized in that The step of determining the ratio of the roller gap compensation amount to the movement time as the pressing speed of the second frame comprises: The ratio of the roller gap compensation amount to the movement time is determined as the initial speed of the second frame; The product of the initial speed and the correction coefficient is determined as the pressing speed of the second frame.

5. The method according to claim 1, characterized in that Determining the roll gap compensation amount of the second frame according to the thickness deviation amount of the second frame includes: According to the thickness deviation of the second frame, the roll gap compensation amount of the second frame is calculated according to the following formula: Among them, DS TEC is the roller gap compensation amount, DH TEC is the thickness deviation, M is the rolling mill stiffness coefficient, and Q is the plasticity coefficient.

6. The method according to claim 1, characterized in that The method further comprises: The hot rolling mill group is controlled to roll the tail region of the steel strip at a preset second conveying speed, wherein the second conveying speed is greater than the first conveying speed, so as to increase the temperature of the tail region of the steel strip.

7. A strip thickness control device, characterized in that: The device comprises: a first acquisition module, configured to acquire a thickness deviation of a second rack in the hot rolling mill group when the hot rolling mill group rolls the tail area of ​​the strip at a preset first conveying speed and a first rack in the hot rolling mill group has tail casting, wherein the hot rolling mill group includes a plurality of racks, different racks correspond to different rolling sequences, and the second rack is the next rack of the first rack; A determination module, configured to determine a roll gap compensation amount of the second frame according to a thickness deviation amount of the second frame, wherein a change direction of the roll gap compensation amount is opposite to a change direction of the thickness deviation amount; The first control module is used to control the second stand in the hot rolling mill group to press down the roll gap compensation amount.

8. An electronic device, characterized in that: The device comprises: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the strip thickness control method according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the strip thickness control method according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the strip thickness control method as described in any one of claims 1-6.

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