Strip thickness control methods, devices, equipment, storage media and program products

Abstract

This application discloses a method, apparatus, equipment, storage medium, and program product for controlling strip thickness, relating to the field of metal processing technology. The method includes: rolling the tail region of the strip in a hot strip mill at a preset first conveying speed, and when tail-end defects occur in the first stand of the hot strip mill; obtaining the thickness deviation of the second stand in the hot strip mill, where the hot strip mill includes multiple stands, each corresponding to a different rolling sequence, and the second stand is the stand following the first stand; determining the roll gap compensation amount of the second stand based on the thickness deviation amount, wherein the roll gap compensation amount changes in the opposite direction to the thickness deviation amount; and controlling the reduction of the roll gap compensation amount in the second stand of the hot strip mill. According to the embodiments of this application, the thickness of the strip tail region can be precisely controlled to a target value, thereby improving the strip production quality.

Description

Technical Field

[0001] This application belongs to the field of metal processing technology, and in particular relates to a method, device, equipment, storage medium and program product for controlling strip thickness. Background Technology

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

[0003] This application provides a strip thickness control method, apparatus, equipment, storage medium, and program product, which can accurately control the thickness of the strip tail to a target value, thereby improving the strip production quality.

[0004] In a first aspect, embodiments of this application provide a method for controlling strip thickness, the method comprising:

[0005] When the hot strip mill rolls the tail area of ​​the strip at a preset first conveying speed, and the first stand in the hot strip mill throws off the tail, the thickness deviation of the second stand in the hot strip mill is obtained. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand after the first stand.

[0006] Based on the thickness deviation of the second frame, the roll gap compensation amount of the second frame is determined, and the roll gap compensation amount changes in the opposite direction to the thickness deviation amount;

[0007] Control the amount of roll gap compensation that the second stand in the hot continuous rolling mill is pressed down.

[0008] Secondly, embodiments of this application provide a strip thickness control device, the device comprising:

[0009] The first acquisition module is used to acquire the thickness deviation of the second stand in the hot strip mill when the strip tail area is rolled by the hot strip mill at a preset first conveying speed and the first stand in the hot strip mill throws out the tail. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand after the first stand.

[0010] The determining module is used to determine the roll gap compensation amount of the second frame based on the thickness deviation amount of the second frame, wherein the roll gap compensation amount changes in the opposite direction to the thickness deviation amount;

[0011] The first control module is used to control the amount of roll gap compensation that the second stand in the hot rolling mill reduces.

[0012] Thirdly, embodiments of this application provide an electronic device, the device including: a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements the strip thickness control method as described above.

[0013] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the strip thickness control method described in any of the above claims.

[0014] Fifthly, embodiments of this application provide a computer program product, wherein when the instructions in the computer program product are executed by the processor of an electronic device, the electronic device performs the strip thickness control method as described in any of the above claims.

[0015] The strip thickness control method, apparatus, equipment, storage medium, and program product of this application embodiment can obtain the thickness deviation of the second stand in the hot strip mill when the tail region of the strip is rolled at a preset first conveying speed in the hot strip mill and tail-out occurs in the first stand of the hot strip mill. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand following the first stand. Based on the thickness deviation of the second stand, the roll gap compensation amount of the second stand is determined. The roll gap compensation amount changes in the opposite direction to the thickness deviation amount. The roll gap compensation amount of the second stand in the hot strip mill is controlled to be reduced. Thus, in this embodiment of the application, when tail-out occurs in the first stand of the hot strip mill, the roll gap compensation amount of the second stand in the hot strip mill is reduced to achieve strip tail thickness compensation control. The thickness of the strip tail can be accurately controlled to the target value, thereby improving the strip production quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic flowchart of the strip thickness control method provided in the embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the strip tail thickness without tail compensation provided in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the rolling force at the tail of the strip before tail compensation is implemented, as provided in the embodiments of this application.

[0020] Figure 4 This is a control block diagram with tail compensation provided in the embodiments of this application;

[0021] Figure 5 This is a schematic diagram of the tail rolling force after tail compensation adjustment provided in the embodiments of this application;

[0022] Figure 6 This is a schematic diagram of the strip thickness control device provided in the embodiments of this application;

[0023] Figure 7 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0024] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

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

[0027] To address the problems of the prior art, embodiments of this application provide a strip thickness control method, apparatus, device, storage medium, and program product. The strip thickness control method provided in this application embodiment will be described first below.

[0028] Figure 1 A schematic flowchart of a strip thickness control method according to an embodiment of this application is shown. Figure 1 As shown, a strip thickness control method may include the following steps S101 to S103:

[0029] S101. When the hot strip mill rolls the tail area of ​​the strip at a preset first conveying speed, and the first stand in the hot strip mill throws off the tail, the thickness deviation of the second stand in the hot strip mill is obtained. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand after the first stand.

[0030] S102. Based on the thickness deviation of the second frame, determine the roll gap compensation amount of the second frame. The roll gap compensation amount changes in the opposite direction to the thickness deviation amount.

[0031] S103. Control the amount of compensation for the roll gap of the second stand in the hot continuous rolling mill.

[0032] The strip thickness control method of this application embodiment can obtain the thickness deviation of the second stand in the hot strip mill when the tail region of the strip is rolled at a preset first conveying speed in the hot strip mill and tail-out occurs in the first stand of the hot strip mill. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand following the first stand. Based on the thickness deviation of the second stand, the roll gap compensation amount of the second stand is determined. The roll gap compensation amount changes in the opposite direction to the thickness deviation amount. The roll gap compensation amount of the second stand in the hot strip mill is controlled to be reduced. Thus, in this embodiment of the application, when tail-out occurs in the first stand of the hot strip mill, the roll gap compensation amount of the second stand in the hot strip mill is reduced to achieve strip tail thickness compensation control. 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 continuous rolling mill includes multiple stands, with different stands corresponding to different rolling sequences. For example, the hot continuous rolling mill can be a 7-stand hot continuous rolling mill. Stands 1-2: roughing stands, whose main task is to significantly reduce the thickness of the rolled piece; stands 3-4: intermediate stands, the transition stage, to further reduce the thickness and control the width; stands 5-7: finishing stands, to precisely control the thickness, shape and surface quality.

[0034] The aforementioned first stand can be the stand in a hot strip mill where the tail end of the strip is ejected. Tail end ejection refers to the operation of quickly throwing or removing the tail end of the strip from the mill near the end of the strip rolling process.

[0035] The second rack mentioned above can be the rack following the first rack.

[0036] The aforementioned thickness deviation can be considered as the amount of thickness increase between the actual thickness of the strip and the target thickness.

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

[0038] The above-mentioned determination of the roll gap compensation amount for the second frame based on the thickness deviation of the second frame can, for example, be calculated according to the following formula based on the thickness deviation of the second frame.

[0039]

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

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

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

[0043] The pressing speed of the second frame is obtained, which is used to characterize the amount of pressing down of the second frame per unit time;

[0044] Specifically, S103 mentioned above may include:

[0045] Control the amount of roll gap compensation in the second stand of the hot strip mill according to the rolling speed.

[0046] The aforementioned pressing speed can be used to characterize the amount of pressing down on the second frame per unit time.

[0047] The aforementioned method of obtaining the pressing speed of the second stand can, for example, involve obtaining the linear velocity of the first stand at the moment of tail-out and the moving distance between the first and second stands; determining the ratio of the moving distance to the linear velocity as the moving time of the strip from the first stand to the second stand; and determining the pressing speed of the second stand as the ratio of the roll gap compensation amount to the moving time. Alternatively, it can also involve obtaining the linear velocity of the first stand at the moment of tail-out and the moving distance between the first and second stands; determining the moving time of the strip from the first stand to the second stand as the ratio of the moving distance to the linear velocity; determining the initial velocity of the second stand as the ratio of the roll gap compensation amount to the moving time; and determining the pressing speed of the second stand as the product of the initial velocity and the correction coefficient.

[0048] In this embodiment, the reduction speed can be used to characterize the amount of reduction of the second stand per unit time. By controlling the reduction speed of the second stand in the hot continuous rolling mill, the roll gap compensation can be reduced. The coordinated control of the reduction speed and the roll gap compensation can smooth the changes in rolling force, avoid sudden changes, thereby reducing vibration and impact during the rolling process and improving the stability of equipment operation.

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

[0050] Obtain the linear velocity of the first frame at the moment of tail jetting and the distance traveled between the first and second frames;

[0051] The ratio of the moving distance to the linear velocity is determined as the time it takes for the strip to move from the first stand to the second stand.

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

[0053] The aforementioned travel time can be the ratio of the travel distance between the first frame and the second frame to the linear velocity of the first frame at the moment of tail throwing.

[0054] The aforementioned pressing speed can be the ratio of roll gap compensation to travel time.

[0055] In this embodiment, the pressing speed of the second stand can be accurately calculated by using the linear velocity of the first stand at the tail-throwing moment, the moving distance between the first stand and the second stand, and the roll gap compensation amount. This allows the second stand in the hot continuous rolling mill to press down the roll gap compensation amount according to the pressing speed, smoothing the changes in rolling force and ensuring the stability of equipment operation.

[0056] In some embodiments, determining the ratio of the roll gap compensation amount to the travel time as the pressing speed of the second frame may specifically include:

[0057] The ratio of the roll gap compensation to the travel time is determined as the initial speed of the second frame;

[0058] The product of the initial velocity and the correction factor is determined as the pressing speed of the second frame.

[0059] The aforementioned correction coefficient can be used by the user to adjust the initial speed of the second rack to meet process requirements or maintain consistency. For example, if the initial speed of the second rack needs to be increased, the correction coefficient C>1 can be set; if the initial speed of the second rack needs to be decreased, C<1 can be set.

[0060] In this embodiment, the ratio of the roll gap compensation to the travel 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-described S102 may specifically include:

[0062] Based on the thickness deviation of the second frame, the roll gap compensation amount of the second frame is calculated according to the following formula.

[0063]

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

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

[0066] The plasticity coefficient mentioned above varies depending on the steel grade and composition. The plasticity coefficient for each steel grade is a variable value and is a characteristic of the strip steel itself.

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

[0068] Because when the strip tail compensation is applied, the rolling force of a single stand increases sharply when the thickness of the tail becomes drastically thinner, causing the strip tail to deviate and the rolling state to change drastically, which can easily lead to strip tail slippage or breakage. As another implementation of this application, to effectively avoid strip tail slippage or breakage, the above method may further include:

[0069] The hot strip mill is controlled to roll the tail section of the strip at a preset second conveying speed, which is greater than the first conveying speed, in order to increase the temperature of the tail section of the strip.

[0070] The conveying speed of the aforementioned hot strip mill refers to the speed at which rolled products (such as steel plates and strips) are transferred from one stand to the next during the hot strip mill process. Conveying speed is a key parameter in the hot strip mill process, directly affecting production efficiency, product quality, and equipment operational stability. It reflects the speed at which the rolled product moves during the rolling process and is an important parameter in the rolling process.

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

[0072] In this embodiment, the hot strip mill is controlled to roll the tail region of the strip at a preset second conveying speed. The second conveying speed is greater than the first conveying speed, which not only increases the strip tail temperature but also shortens the effective control time of the strip. However, the control also has a certain delay, so the control effect downstream will be reduced, which alleviates the rapid increase of the tail rolling force. That is, the tail rolling force decreases, and the centerline deviation is significantly improved, thereby effectively avoiding situations such as strip tail swing or breakage.

[0073] To facilitate understanding of the strip thickness control method in the embodiments of this application, the actual application process of this strip thickness control method is described as follows:

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

[0075] In this embodiment, tail compensation is used to control the tail thickness to the target value, thereby improving the finished product thickness accuracy. Specifically, tail compensation is based on a forced reduction amount given by the secondary process computer to compensate the tail of the strip. Before tail compensation adjustment, the tail compensation amount is calculated for stands F2-F7. Since the thickness increase is different for different stands, corresponding calculations need to be performed separately for each stand. The following formula is the basic calculation formula for tail compensation:

[0076]

[0077] Wherein, DStec is the tail end compensation amount (equivalent to the roll gap compensation amount mentioned above), DHtec is the thickness increase amount (equivalent to the thickness deviation amount mentioned above), M is the mill stiffness (the stiffness characteristic of the 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 compositions, the plasticity coefficient of each steel grade is a variable value, which is a characteristic of the strip itself).

[0078] In some embodiments, the initial value is issued by the secondary process computer. After the set value is issued, the primary computer reads the speed of the tail of the strip at the time of the previous stand after the previous stand throws the strip. Based on the tail throwing speed of the previous stand, the primary computer determines the pressing rate of the current stand (equivalent to the pressing speed mentioned above) and uses the pressing rate as the slope of the pressing amount ramp generator, thereby achieving uniform pressing of the tail of the strip. Figure 4 The diagram shows the control block diagram with tail compensation, where Vn-1 is the linear velocity at the moment of steel throwing on the previous stand, L is the moving distance between stands, tn-1 is the pre-calculated moving time between stands, an is the total tail compensation amount (equivalent to the roll gap compensation amount mentioned above), and Cn is a constant for the pressing speed of each stand (equivalent to the correction coefficient mentioned above). When the TEC AGC switch is turned on, the secondary computer sends out the base value, which is then calculated and the load is calculated for 6 stands. The pressing slope is determined based on the tail throwing speed of the previous stand, thereby determining the pressing amount and pressing time of a single stand. Figure 5 As shown, this illustrates the tail rolling force after tail compensation adjustment.

[0079] In some embodiments, due to the tail compensation effect, the strip tail will be rapidly thinned, and the actual rolling force of a single stand will increase sharply (e.g., 3000KN-4000KN). The strip tail deviation will also change drastically. If not adjusted in time, it will cause the strip tail to wobble or break, affecting the surface quality of the strip. To address this, the compensation function starts when the strip is thrown off the previous stand, and then the strip conveying speed is increased in the downstream stand. This not only increases the strip tail temperature but also shortens the effective control time of the strip. Since there is a certain delay in control, the control effect in the downstream is reduced, thus alleviating the rapid increase in the tail rolling force, i.e., the strip tail rolling force decreases, and the centerline deviation is significantly improved.

[0080] This application, based on the existing conventional hot strip mill line, achieves strip tail compensation by changing the shape of the strip tail roll gap, for example, adjusting the F2-F7 strip tail pressure roll gap from 100um-300um to a strip tail open roll gap of 20um-50um. Simultaneously, by increasing the strip conveying speed, the temperature at the heated tail can be controlled, ensuring the thickness remains within the customer's required range even with tail compensation and an open roll gap. Different specifications are categorized into different hardness grades in L2, and different degrees of compensation are applied to different steel grades according to specifications and hardness grades, thus allowing for adjustments based on different customer requirements. Experiments have shown that after adjusting the F2-F7 pressure roll gap from 100um-300um to a 20um open roll gap, increasing the strip tail temperature by 20°C alleviates the rapid increase in tail rolling force, resulting in a decrease in tail rolling force and a significant improvement in centerline deviation.

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

[0082] like Figure 6 As shown, the strip thickness control device 600 provided in this application embodiment 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 stand in the hot strip mill when the strip tail area is rolled by the hot strip mill at a preset first conveying speed and the first stand in the hot strip mill throws out the tail. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand after the first stand.

[0084] The determining module 602 is used to determine the roll gap compensation amount of the second frame based on the thickness deviation amount of the second frame. The roll gap compensation amount changes in the opposite direction to the thickness deviation amount.

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

[0086] The strip thickness control device of this application embodiment can acquire the thickness deviation of the second stand in the hot strip mill when the tail region of the strip is rolled at a preset first conveying speed in the hot strip mill and tail-out occurs in the first stand of the hot strip mill. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand following the first stand. Based on the thickness deviation of the second stand, the roll gap compensation amount of the second stand is determined. The roll gap compensation amount changes in the opposite direction to the thickness deviation amount. The roll gap compensation amount of the second stand in the hot strip mill is reduced. Thus, in this application embodiment, when tail-out occurs in the first stand of the hot strip mill, the roll gap compensation amount of the second stand in the hot strip mill is reduced to achieve strip tail thickness compensation control. The thickness of the strip tail can be accurately controlled to the target value, thereby improving the strip production quality.

[0087] As one implementation of this application, in order to smooth changes in rolling force, the above-mentioned device 600 may further include:

[0088] The second acquisition module is used to acquire the pressing speed of the second rack, which is used to characterize the amount of pressing down of the second rack per unit time.

[0089] The aforementioned first control module 603 is specifically used to control the second stand in the hot continuous rolling mill to reduce the roll gap compensation amount according to the reduction speed.

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

[0091] The acquisition unit is used to acquire the linear velocity of the first frame at the moment of tail ejection and the moving distance between the first frame and the second frame;

[0092] The first determining unit is used to determine the ratio of the moving distance to the linear velocity 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 roll gap compensation amount to the travel time as the pressing speed of the second frame.

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

[0095] The first determining subunit is used to determine the ratio of the roll gap compensation amount to the travel time as the initial speed of the second frame;

[0096] The second determining sub-unit is used to determine the pressing speed of the second frame by multiplying the initial velocity by the correction coefficient.

[0097] In some embodiments, the determining module 602 described above can be specifically used to calculate the roll gap compensation amount of the second frame according to the thickness deviation of the second frame, using the following formula.

[0098]

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

[0100] Because when the strip tail compensation is applied, the single-stand rolling force increases sharply when the tail thickness decreases rapidly, causing the strip tail to deviate and the rolling state to change drastically, which can easily lead to strip tail slippage or breakage. As another implementation of this application, to effectively avoid strip tail slippage or breakage, the aforementioned device 600 may further include:

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

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

[0103] An 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), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0105] Memory 702 may include mass storage for data or instructions. For example, and not limitingly, memory 702 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 702 may include removable or non-removable (or fixed) media. Where appropriate, memory 702 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 702 is non-volatile solid-state memory.

[0106] In a particular embodiment, memory 702 may include read-only memory (ROM), random access memory (RAM), disk storage media device, optical storage media device, flash memory device, electrical, optical, or other physical / tangible memory storage device. Thus, generally, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) 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 one aspect of this disclosure.

[0107] The processor 701 reads and executes computer program instructions stored in the memory 702 to implement any of the strip thickness control methods in the above embodiments.

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

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

[0110] Bus 710 includes hardware, software, or both, that couples components of an electronic device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 710 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0111] This electronic device can execute the strip thickness control method in the embodiments of this application, thereby achieving the combination Figure 1 and Figure 6 The described method and apparatus for controlling strip thickness.

[0112] Furthermore, in conjunction with the strip thickness control methods in the above embodiments, this application embodiment can provide a computer-readable storage medium for implementation. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the strip thickness control methods in the above embodiments.

[0113] In conjunction with the strip thickness control method in the above embodiments, this application embodiment can provide a computer program product, in which the instructions in the computer program product, when executed by the processor of an electronic device, cause the electronic device to perform any of the strip thickness control methods described above.

[0114] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0115] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on 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, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0116] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. 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 embodiments, or in a different order, or several steps can be performed simultaneously.

[0117] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, 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 apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. 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 is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0118] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A method for controlling strip thickness, characterized in that, include: When the hot strip mill rolls the tail area of ​​the strip at a preset first conveying speed, and the first stand in the hot strip mill throws off the tail, the thickness deviation of the second stand in the hot strip mill is obtained. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand after the first stand. Based on the thickness deviation of the second frame, the roll gap compensation amount of the second frame is determined, and the roll gap compensation amount changes in the opposite direction to the thickness deviation amount; Control the amount of roll gap compensation that is pressed down by the second stand in the hot continuous rolling mill; Before controlling the second stand in the hot strip mill to reduce the roll gap compensation amount, the method further includes: The pressing speed of the second rack is obtained, and the pressing speed is used to characterize the amount of pressing down of the second rack per unit time; The control of the second stand in the hot strip mill pressing down the roll gap compensation amount includes: Control the second stand in the hot continuous rolling mill to reduce the roll gap compensation amount according to the reduction speed; The step of obtaining the pressing speed of the second frame includes: Obtain the linear velocity of the first frame at the moment of tail ejection and the moving distance between the first frame and the second frame; The ratio of the moving distance to the linear velocity is determined as the moving time of the strip from the first frame to the second frame; The ratio of the roll gap compensation to the travel time is determined as the pressing speed of the second frame.

2. The method according to claim 1, characterized in that, Determining the ratio of the roll gap compensation amount to the travel time as the pressing speed of the second frame includes: The ratio of the roll gap compensation to the travel time is determined as the initial speed of the second frame; The product of the initial velocity and the correction coefficient is determined as the pressing speed of the second frame.

3. The method according to claim 1, characterized in that, The step of determining the roll gap compensation amount of the second frame based on the thickness deviation of the second frame includes: Based on 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 DH is the amount of roll gap compensation. TEC The thickness deviation is M, where M is the mill stiffness coefficient and Q is the plasticity coefficient.

4. The method according to claim 1, characterized in that, The method further includes: The strip compensation function is initiated when the strip is thrown on the first frame, and the conveying speed of the strip is increased on the second frame to increase the temperature of the tail region of the strip.

5. A strip thickness control device, characterized in that, The device includes: The first acquisition module is used to acquire the thickness deviation of the second stand in the hot strip mill when the strip tail area is rolled by the hot strip mill at a preset first conveying speed and the first stand in the hot strip mill throws out the tail. The hot strip mill includes multiple stands, and different stands correspond to different rolling sequences. The second stand is the stand after the first stand. The determining module is used to determine the roll gap compensation amount of the second frame based on 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 first control module is used to control the amount of roll gap compensation that the second stand in the hot continuous rolling mill presses down; The device further includes: The second acquisition module is used to acquire the pressing speed of the second rack, wherein the pressing speed is used to characterize the amount of pressing down of the second rack per unit time; The first control module is specifically used to control the second stand in the hot strip mill to press down the roll gap compensation amount according to the pressing speed; The second acquisition module includes: The acquisition unit is used to acquire the linear velocity of the first frame at the moment of tail ejection and the moving distance between the first frame and the second frame; The first determining unit is used to determine the ratio of the moving distance to the linear velocity as the moving time of the strip from the first frame to the second frame; The second determining unit is used to determine the ratio of the roll gap compensation amount to the travel time as the pressing speed of the second frame.

6. An electronic device, characterized in that, The device includes: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, it implements the strip thickness control method as described in any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the strip thickness control method as described in any one of claims 1-4.

8. A computer program product, characterized in that, When the instructions in the computer program product are executed by the processor of the electronic device, the electronic device performs the strip thickness control method as described in any one of claims 1-4.

Images