A control method, device, medium, and electronic equipment for a 20-roll rolling mill
By adjusting the rolling parameters of the 20-roll mill, the rolling instability caused by strip misalignment defects was resolved, ensuring strip shape quality and production efficiency, and avoiding deviation and strip breakage accidents.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
- Filing Date
- 2024-08-29
- Publication Date
- 2026-05-26
AI Technical Summary
The 20-roll mill cannot roll stably when there are misalignment defects in the strip, resulting in poor strip shape quality, easy deviation and strip breakage accidents, and increased labor intensity of operators.
Before starting the first pass of the 20-roll mill, the overlap deviation value and direction between the strip centerline and the rolling centerline are determined. The roll shifting values of the upper intermediate roll, the lower intermediate roll, the main hydraulic cylinder leveling value, and the ASU rack value of the support roll are adjusted to achieve the overlap between the strip centerline and the rolling centerline, thus ensuring rolling stability.
Stable rolling was achieved using a 20-roll mill, avoiding strip shape asymmetry and strip breakage accidents, and improving production efficiency and strip quality.
Smart Images
Figure CN119056885B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of steel rolling, and in particular to a control method, device, medium and electronic equipment for a 20-roll mill. Background Technology
[0002] The outer ring of the strip exhibits misalignment. Combined with the original setting method for the intermediate roll shift value of the 20-roll mill, it is impossible to roll the misaligned strip. This easily leads to uneven strip shape in the first pass, with some layers exhibiting larger wavy patterns than others, resulting in strip misalignment and breakage accidents. Furthermore, manual handling of strip breaks is complex, poses significant safety hazards, and increases the workload of operators.
[0003] Therefore, how to adopt an effective control method for a 20-roll mill to achieve stable rolling of the strip when there are misalignment defects, and to ensure the strip shape quality, is an urgent technical problem to be solved. Summary of the Invention
[0004] The purpose of this application is to provide a control method, device, medium, and electronic equipment for a 20-roll mill. This application solves the problem that the 20-roll mill cannot roll stably when there are misalignment defects in the strip. By adjusting and optimizing the rolling parameters, this application can achieve stable rolling of the 20-roll mill, ensure the strip shape quality, and improve the production line efficiency.
[0005] Specifically, this application adopts the following technical solution:
[0006] According to one aspect of the embodiments of this application, a control method for a 20-roll mill is provided. The method includes: before the first pass of the 20-roll mill is started, determining the overlap deviation value between the strip centerline and the rolling centerline, and determining the deviation direction of the strip centerline from the rolling centerline, the deviation direction including working side deviation and drive side deviation; adjusting the upper intermediate roll shifting value, the next intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction; and controlling the 20-roll mill to start rolling according to the adjusted upper intermediate roll shifting value, next intermediate roll shifting value, main hydraulic cylinder leveling value, and support roll ASU rack value.
[0007] In some embodiments of this application, based on the foregoing scheme, before adjusting the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction, the method further includes: calculating the first actual shifting value of the upper intermediate roll of the 20-roll mill and the second actual shifting value of the lower intermediate roll of the 20-roll mill, wherein the first actual shifting value is calculated according to the following formula 1, and the second actual shifting value is calculated according to the following formula 2;
[0008] Formula 1:
[0009] Where X1 is the first actual roll shifting value, T1 is the cone length of the previous intermediate roll, B1 is the distance from the cone angle position of the previous intermediate roll to the edge of the strip, and W is the strip width.
[0010] Formula 2:
[0011] Where X2 is the second actual roll shifting value, T2 is the cone length of the next intermediate roll, B2 is the distance from the cone angle position of the next intermediate roll to the edge of the strip, and W is the strip width.
[0012] In some embodiments of this application, based on the foregoing scheme, adjusting the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction includes:
[0013] When the deviation direction is a working side deviation, based on the first actual roller deviation value, the upper intermediate roller deviation value is increased by a first preset value, and based on the second actual roller deviation value, the next intermediate roller deviation value is decreased by a first preset value; when the deviation direction is a working side deviation, the main hydraulic cylinder leveling value is increased by a second preset value; when the deviation direction is a working side deviation, the support roller ASU first rack value is increased by a third preset value, and the support roller ASU seventh rack value is decreased by a third preset value.
[0014] In some embodiments of this application, based on the foregoing scheme, the method further includes:
[0015] When the deviation direction is a drive-side deviation, based on the first actual roll shifting value, the roll shifting value of the previous intermediate roll is lowered by a first preset value, and based on the second actual roll shifting value, the roll shifting value of the next intermediate roll is increased by a first preset value; when the deviation direction is a drive-side deviation, the leveling value of the main hydraulic cylinder is lowered by a second preset value; when the deviation direction is a drive-side deviation, the first rack value of the support roll ASU is lowered by a third preset value, and the seventh rack value of the support roll ASU is increased by a third preset value.
[0016] In some embodiments of this application, based on the foregoing scheme, the first preset value is the overlap deviation value.
[0017] In some embodiments of this application, based on the foregoing scheme, the second preset value is calculated according to the following formula:
[0018] The second preset value = 10 × L, where L is the overlap deviation value.
[0019] In some embodiments of this application, based on the foregoing scheme, the third preset value is calculated according to the following formula:
[0020] The third preset value = 2 × L, where L is the overlap deviation value.
[0021] According to one aspect of the embodiments of this application, a control device for stable rolling of a 20-roll mill is provided. The device includes: a determining unit, configured to determine the overlap deviation value between the strip centerline and the rolling centerline before the first pass of the 20-roll mill is started, and to determine the deviation direction of the strip centerline from the rolling centerline, the deviation direction including working side deviation and drive side deviation; an adjusting unit, configured to adjust the upper intermediate roll shifting value, the next intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction; and a control unit, configured to control the 20-roll mill to start rolling according to the adjusted upper intermediate roll shifting value, the next intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value.
[0022] According to one aspect of the present application, a computer-readable storage medium is provided, wherein at least one piece of program code is stored in the computer-readable storage medium, the at least one piece of program code being loaded and executed by a processor to implement the operations performed by the control method of the 20-roll mill described above.
[0023] According to one aspect of the present application, an electronic device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the operations performed by the control method for the 20-roll mill described above.
[0024] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:
[0025] The proposed solution can solve the problem of unstable rolling in a 20-roll mill when there are misalignment defects in the strip. By adjusting and optimizing the rolling parameters, this application can achieve stable rolling in a 20-roll mill, ensure the strip shape quality, and improve the production line efficiency. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0027] Figure 1 A flowchart of a control method for a 20-roll mill according to one embodiment of this application is shown;
[0028] Figure 2 A schematic diagram of the upper intermediate roller cone and the lower intermediate roller cone in one embodiment of this application is shown;
[0029] Figure 3 A schematic diagram of the upper intermediate roller and the lower intermediate roller in one embodiment of this application is shown;
[0030] Figure 4 This illustration shows a strip shape diagram with a strip centerline and rolling centerline overlap deviation of 4 mm in one embodiment of this application, and the deviation direction is the drive side.
[0031] Figure 5 This illustration shows a schematic diagram of the strip shape after adjusting the values of the upper intermediate roll and the lower intermediate roll in one embodiment of this application.
[0032] Figure 6 This illustration shows a schematic diagram of the strip shape after adjusting the leveling value of the main hydraulic cylinder in one embodiment of this application.
[0033] Figure 7 This illustration shows a schematic diagram of the final strip shape obtained after adjusting the ASU rack value of the support roller in one embodiment of this application.
[0034] Figure 8 A structural block diagram of a control device for a 20-roll mill according to one embodiment of this application is shown;
[0035] Figure 9 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation
[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.
[0037] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0038] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily need to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.
[0040] The implementation details of the technical solutions in the embodiments of this application are described in detail below:
[0041] Reference Figure 1 , Figure 1 This is a flowchart of a control method for a 20-roll mill in one embodiment of this application.
[0042] According to a typical embodiment of this application, a control method for a 20-roll mill is provided, the method comprising the following steps S1 to S3:
[0043] Step S1: Before starting the first pass of the 20-roll mill, determine the overlap deviation between the strip centerline and the rolling centerline, and determine the deviation direction of the strip centerline from the rolling centerline. The deviation direction includes working side deviation and drive side deviation.
[0044] In this application, due to uncontrollable external factors, misalignment defects may appear on the outer ring of the strip head. If the strip with misalignment defects continues to be rolled, it is highly likely that the single-layer wavy shape of the strip will be large or small during the first pass of the 20-roll mill, leading to strip deviation and breakage accidents. Furthermore, since the strip is thicker during the first pass, handling a breakage accident is complex, requiring operators to enter the mill area to cut off the broken steel pieces, posing significant safety hazards and increasing the labor intensity of the operators. To ensure the rolling stability of the 20-roll mill during the first pass, it is necessary to first determine whether there is a misalignment defect at the strip head. Before starting the first pass of the 20-roll mill, the overlap deviation between the strip centerline and the rolling centerline can be determined. If the overlap deviation value is 0, it is determined that the strip centerline and the rolling centerline coincide, and the strip head does not have a misalignment defect, allowing the strip to be directly rolled in the first pass.
[0045] If the overlap deviation value is not 0, it is determined that there is a misalignment defect at the head of the strip, which causes the center line of the strip to deviate from the rolling center line. After determining that there is a misalignment defect at the head of the strip, it is also necessary to determine the deviation direction of the strip center line from the rolling center line. The deviation direction may include working side deviation and driving side deviation. The working side and driving side are the working side and driving side of the mill relative to the twenty-roll mill.
[0046] Step S2: Based on the overlap deviation value and the deviation direction, adjust the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill.
[0047] Step S3: Control the 20-roll mill to start rolling according to the adjusted values of the upper intermediate roll shifting, the lower intermediate roll shifting, the main hydraulic cylinder leveling, and the support roll ASU rack.
[0048] In this application, after determining the overlap deviation and the deviation direction, the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill can be adjusted according to the overlap deviation value and the deviation direction. It is understood that, with reference to... Figure 2 The upper intermediate roll shifting value and the lower intermediate roll shifting value are the shifting values of the upper intermediate roll 201 and the lower intermediate roll 202, respectively. The upper intermediate roll 201 and the lower intermediate roll 202 change the strip shape by shifting left and right. The main hydraulic cylinder leveling value and the support roll ASU rack value can change the roll gap of the work rolls of the twenty-roll mill, that is, can change the amount of reduction on both sides of the strip width direction.
[0049] After adjusting the values of the upper intermediate roll shifting, the lower intermediate roll shifting, the main hydraulic cylinder leveling, and the support roll ASU rack, the 20-roll mill can be controlled to start rolling according to the adjusted values of the upper intermediate roll shifting, the lower intermediate roll shifting, the main hydraulic cylinder leveling, and the support roll ASU rack. At this time, the overlap deviation between the strip centerline and the rolling process is 0, and the 20-roll mill can be controlled to start rolling.
[0050] In one embodiment of this application, before adjusting the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill based on the overlap deviation value and the deviation direction, the method further includes:
[0051] Calculate the first actual roll shift value of the upper intermediate roll of the 20-roll mill and the second actual roll shift value of the next intermediate roll of the 20-roll mill, wherein the first actual roll shift value is calculated according to the following formula 1 and the second actual roll shift value is calculated according to the following formula 2.
[0052] Formula 1:
[0053] Where X1 is the first actual roll shift value (e.g., Figure 3 As shown in the figure, X1), T1 is the cone length of the previous intermediate roller (e.g. ...). Figure 3 As shown in the diagram, T1 represents the distance from the cone angle of the previous intermediate roll to the edge of the strip (e.g., T1). Figure 3 In the diagram, B1), W represents the strip width;
[0054] Formula 2:
[0055] Where X2 is the second actual roll shift value (e.g., Figure 3 X2 as shown in the figure), T2 is the cone length of the next intermediate roller (as shown in the figure). Figure 3 As shown in T2), B2 is the distance from the cone angle position of the next intermediate roll to the edge of the strip (e.g., T2). Figure 3 In the figure, B2), W is the width of the strip.
[0056] In this application, before adjusting the rolling parameters of the 20-roll mill, it is necessary to obtain the actual roll shift values of the upper intermediate roll and the lower intermediate roll. When performing the first pass of rolling on strip without misalignment defects, the secondary system will give the upper intermediate roll and the lower intermediate roll a set roll shift value. Ideally, the roll shift values of the upper intermediate roll and the lower intermediate roll are equal. However, due to long-term wear, the actual roll shift values of the upper intermediate roll and the lower intermediate roll may change. In order to ensure the accuracy of adjusting the roll shift values of the upper intermediate roll and the lower intermediate roll of the 20-roll mill, it is necessary to obtain the actual roll shift values of the upper intermediate roll and the lower intermediate roll before adjusting the rolling parameters.
[0057] Continue to refer to Figure 2 Since both the upper intermediate roll 201 and the lower intermediate roll 202 have a cone, the cone is used to adjust the strip shape on both sides in the width direction of the strip. The upper intermediate roll cone 203 and the lower intermediate roll cone 204 are not on the same side. The upper intermediate roll cone 203 is on the working side, and the lower intermediate roll cone 204 is on the driving side. When a misalignment defect occurs at the head of the strip, the strip centerline will deviate from the rolling centerline, causing the strip centerline to deviate towards the working side or the driving side. Since both the upper intermediate roll 201 and the lower intermediate roll 202 have a cone, if the strip deviates towards the working side, the reduction on both sides of the strip width direction will be different. The reduction on the side of the strip at the cone will be less than the reduction on the side of the strip not at the cone. This will cause the strip width direction to be wavy and asymmetrical, which will affect the rolling stability. Therefore, when obtaining the actual roll shifting value of the upper intermediate roll 201 and the lower intermediate roll 202, the influence of the upper intermediate roll cone 203 and the lower intermediate roll cone 204 on the roll shifting value of the upper intermediate roll and the lower intermediate roll needs to be considered.
[0058] When calculating the first actual roll shift value of the upper intermediate roll of the 20-roll mill, the first actual roll shift value can be calculated according to Formula 1 above; when calculating the first actual roll shift value of the lower intermediate roll of the 20-roll mill, the second actual roll shift value can be calculated according to Formula 2 above. This ensures the accuracy of the first and second actual roll shift values obtained before adjusting the roll shift values of the upper and lower intermediate rolls of the 20-roll mill.
[0059] In one embodiment of this application, adjusting the upper intermediate roll deviation value, the lower intermediate roll deviation value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill based on the overlap deviation value and the deviation direction includes:
[0060] When the deviation direction is a working side deviation, based on the first actual roller deviation value, the upper intermediate roller deviation value is increased by a first preset value, and based on the second actual roller deviation value, the next intermediate roller deviation value is decreased by a first preset value; when the deviation direction is a working side deviation, the main hydraulic cylinder leveling value is increased by a second preset value; when the deviation direction is a working side deviation, the support roller ASU first rack value is increased by a third preset value, and the support roller ASU seventh rack value is decreased by a third preset value.
[0061] In this application, when it is determined that there is a misalignment defect at the head of the strip and the deviation direction is the working side, the working roll gap of the 20-roll mill is larger on the working side than on the driving side. That is, the reduction on the working side of the strip is less than the reduction on the driving side. In order to ensure that the reduction on the working side and the driving side of the strip are the same, the roll shifting value of the previous intermediate roll can be increased by a first preset value based on the first actual roll shifting value, and the roll shifting value of the next intermediate roll can be decreased by a first preset value based on the second actual roll shifting value, so as to ensure that the center line of the strip coincides with the rolling center line.
[0062] By adjusting the values of the upper and lower intermediate rolls to make the strip centerline coincide with the rolling centerline, and to ensure that the reduction on the working side and the drive side of the strip is the same, it is also necessary to adjust the leveling value of the main hydraulic cylinder and the ASU rack value of the support roll. The adjustment of the leveling value of the main hydraulic cylinder can change the size of the roll gap of the working rolls of the 20-roll mill. When the deviation direction is the working side deviation, the leveling value of the main hydraulic cylinder can be increased by a second preset value to ensure that the reduction on both sides of the strip width direction is the same. In order to ensure the strip shape during rolling, the ASU rack value of the support roll can also be adjusted when the deviation direction is the working side deviation. The ASU rack of the support roll includes the first rack of the support roll to the seventh rack of the support roll.
[0063] It is understandable that, for example, when the value of the first rack of the support roll ASU is increased, the first rack of the support roll ASU moves upward, and the bearing of the support roll bushing corresponding to the first rack of the support roll ASU moves downward, thereby increasing the reduction on the working side of the 20-roll mill and reducing the roll gap of the working rolls on the working side; thus reducing the reduction on the driving side of the 20-roll mill and increasing the roll gap of the working rolls on the driving side; in order to ensure that the reduction on both sides in the strip width direction is the same and the strip shape is the same, the value of the first rack of the support roll ASU can be increased by a third preset value, and the value of the seventh rack of the support roll ASU can be decreased by a third preset value.
[0064] In one embodiment of this application, the method further includes: when the deviation direction is a drive-side deviation, lowering the previous intermediate roll deviation value by a first preset value based on the first actual roll deviation value, and raising the next intermediate roll deviation value by a first preset value based on the second actual roll deviation value; when the deviation direction is a drive-side deviation, lowering the main hydraulic cylinder leveling value by a second preset value; when the deviation direction is a drive-side deviation, lowering the support roller ASU first rack value by a third preset value, and raising the support roller ASU seventh rack value by a third preset value.
[0065] In one embodiment of this application, the first preset value can be the overlap deviation value, that is, when the overlap deviation value is 4mm, the first preset value can be 4mm.
[0066] In one embodiment of this application, the second preset value is calculated according to the following formula: second preset value = 10 × L, where L is the overlap deviation value. For example, when the overlap deviation value is 4 mm, the second preset value can be 40 mm.
[0067] In one embodiment of this application, the third preset value is calculated according to the following formula: third preset value = 2 × L, where L is the overlap deviation value. For example, when the overlap deviation value is 4 mm, the third preset value can be 8 mm.
[0068] The specific implementation of this application will be further illustrated by specific embodiments below, but the specific implementation of this application is not limited to the following embodiments.
[0069] In one specific embodiment of this application, the strip thickness is 2.3 mm and the width is 1235 mm. The outer ring of the strip head has a misalignment defect, and the overlap deviation between the strip centerline and the rolling centerline is 4 mm, with the deviation direction being the drive side. The starting plate of the strip is shaped as follows: Figure 4 As shown, if the 20-roll mill is directly controlled for start-up rolling, the strip shape in the first pass will exhibit a phenomenon where the single-layer wave shape is large or small, which can easily lead to deviation and strip breakage accidents.
[0070] To ensure stable start-up rolling of the strip in the first pass, the first actual roll shift value of the upper intermediate roll and the second actual roll shift value of the lower intermediate roll of the 20-roll mill can be obtained. The roll shift value of the upper intermediate roll can be reduced by 4mm from the first actual roll shift value, and the roll shift value of the lower intermediate roll can be increased by 4mm from the second actual roll shift value. This ensures that the overlap deviation between the strip centerline and the mill rolling centerline is 0mm, meaning the strip centerline and the mill rolling centerline are completely aligned. This reduces the working side reduction and increases the driving side reduction, effectively mitigating the problem of unequal roll gap sizes on both sides of the working roll gap (unequal strip edge reduction) caused by the cone angle slope of the upper and lower intermediate rolls of the 20-roll mill. After adjusting the roll shift values of the upper and lower intermediate rolls, the resulting strip shape is as follows: Figure 5 As shown.
[0071] Depend on Figure 5 As shown, the strip shape still exhibits an asymmetrical trend. To ensure the strip shape, the leveling value of the main hydraulic cylinder of the 20-roll mill can be adjusted. The leveling value can be set to -40mm to adjust the reduction of the strip at the roll gaps on both sides, intervening in the initial strip shape formation. After adjusting the main hydraulic cylinder leveling value, the resulting strip shape diagram is as follows. Figure 6 As shown.
[0072] To ensure the stability and shape symmetry of the strip during the first pass, the ASU rack value of the support rolls in the 20-roll mill can be adjusted. Reducing the first rack value by 8mm causes the first rack to move downwards, and the corresponding support roll bushing to move upwards. Increasing the seventh rack value by 8mm causes the first rack to move upwards, and the corresponding support roll bushing to move downwards. This causes the eccentric toothed ring of the support rolls to bend and deform, further reducing the reduction on the working side of the strip and increasing the reduction on the driving side. Ultimately, this ensures that the strip centerline completely coincides with the mill's rolling centerline, and the roll gap values on both sides of the working roll gap are close, guaranteeing the stability and shape symmetry of the strip during the first pass and achieving the target shape. The target shape is as follows: Figure 7 As shown.
[0073] According to the adjusted values of the upper intermediate roll shifting, the lower intermediate roll shifting, the main hydraulic cylinder leveling, and the support roll ASU rack value, the 20-roll mill is controlled to start rolling. There is no phenomenon of large or small single-layer wavy shape in the first pass, which avoids strip deviation and strip breakage accidents, and the strip shape and quality are qualified.
[0074] The following describes an embodiment of the apparatus described in this application, which can be used to execute the control method for a 20-roll mill in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the control method for a 20-roll mill described above in this application.
[0075] Figure 8 This is a structural block diagram of a control device for a 20-roll mill according to an embodiment of this application.
[0076] Reference Figure 8 As shown, a control device 800 for a 20-roll mill according to an embodiment of this application includes: a determination unit 801, an adjustment unit 802, and a control unit 803.
[0077] The determining unit 801 is used to determine the overlap deviation between the strip centerline and the rolling centerline before the first pass of the 20-roll mill is started, and to determine the deviation direction of the strip centerline from the rolling centerline. The deviation direction includes working side deviation and driving side deviation.
[0078] The adjustment unit 802 is used to adjust the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction.
[0079] The control unit 803 is used to control the twenty-roll mill to start rolling according to the adjusted values of the upper intermediate roll shifting, the lower intermediate roll shifting, the main hydraulic cylinder leveling, and the support roll ASU rack value.
[0080] Reference Figure 9 , Figure 9 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.
[0081] like Figure 9 As shown, the computer system 900 includes a Central Processing Unit (CPU) 901, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 902 or programs loaded from Storage Unit 908 into Random Access Memory (RAM) 903, such as performing the methods described in the above embodiments. The RAM 903 also stores various programs and data required for system operation. The CPU 901, ROM 902, and RAM 903 are interconnected via a bus 904. An Input / Output (I / O) interface 905 is also connected to the bus 904.
[0082] The following components are connected to I / O interface 905: an input section 906 including a keyboard, mouse, etc.; an output section 907 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 908 including a hard disk, etc.; and a communication section 909 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 909 performs communication processing via a network such as the Internet. A drive 910 is also connected to I / O interface 905 as needed. Removable media 911, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 910 as needed so that computer programs read from them can be installed into storage section 908 as needed.
[0083] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 909, and / or installed from removable medium 911. When the computer program is executed by central processing unit (CPU) 901, it performs various functions defined in the system of this application.
[0084] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.
[0085] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0086] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.
[0087] According to a typical embodiment of this application, this application also proposes a computer-readable storage medium storing at least one piece of program code, which is loaded and executed by a processor to implement the operations performed by the control method for the twenty-roll mill as described above.
[0088] According to a typical embodiment of this application, this application also proposes an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, characterized in that the processor executes the computer program to implement the operations performed by the control method for the twenty-roll mill as described above.
[0089] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.
[0090] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:
[0091] Firstly, the proposed solution solves the problem that the 20-roll mill cannot roll stably when there are misalignment defects in the strip. By adjusting and optimizing the rolling parameters, this application can achieve stable rolling of the 20-roll mill, ensure the strip shape quality, and improve the production line efficiency.
[0092] Secondly, by adopting the solution proposed in this application, the phenomenon of large or small single-layer wavy shape of the strip is avoided during the first rolling pass, thus preventing strip deviation and breakage accidents, greatly saving resources and improving the quality of the strip.
[0093] Third, by adopting the scheme proposed in this application and combining it with existing rolling mill equipment, stable rolling of the 20-roll mill can be achieved through pre-intervention and mutual coordination of rolling parameters. At the same time, the frequency of strip breakage handling by operators is reduced, and the safety hazards caused by strip breakage are reduced. It has strong feasibility and safety.
[0094] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or substance of the application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A control method for a 20-roll rolling mill, characterized in that, The method includes: Before starting the first pass of the 20-roll mill, the overlap deviation between the strip centerline and the rolling centerline is determined, as well as the deviation direction of the strip centerline from the rolling centerline is determined. The deviation direction includes working side deviation and drive side deviation. Based on the overlap deviation value and the deviation direction, adjust the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill. The 20-roll mill is controlled to start rolling according to the adjusted values of the upper intermediate roll shifting, the lower intermediate roll shifting, the main hydraulic cylinder leveling, and the support roll ASU rack value. Before adjusting the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill based on the overlap deviation value and the deviation direction, the method further includes: Calculate the first actual roll shifting value of the upper intermediate roll of the 20-roll mill and the second actual roll shifting value of the next intermediate roll of the 20-roll mill, wherein the first actual roll shifting value is calculated according to the following formula 1 and the second actual roll shifting value is calculated according to the following formula 2. Official 1: in, X 1 represents the first actual roll shift value. T1 The cone length of the previous intermediate roller. B1 This refers to the distance from the cone angle of the previous intermediate roll to the edge of the strip. W The width of the strip; Official 2: in, X2 This is the second actual roll shift value. T2 The cone length of the next intermediate roller. B2 The distance from the cone angle position of the next intermediate roll to the edge of the strip. W The width of the strip; The step of adjusting the upper intermediate roll deviation value, the lower intermediate roll deviation value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction includes: When the deviation direction is a working side deviation, the deviation value of the previous intermediate roll is increased by a first preset value based on the first actual roll deviation value, and the deviation value of the next intermediate roll is decreased by a first preset value based on the second actual roll deviation value. When the deviation direction is a working side deviation, the leveling value of the main hydraulic cylinder is increased by the second preset value; When the deviation direction is a working side deviation, the first rack value of the support roller ASU is increased by a third preset value, and the seventh rack value of the support roller ASU is decreased by a third preset value.
2. The method according to claim 1, characterized in that, The method further includes: When the deviation direction is a drive-side deviation, based on the first actual roll shifting value, the roll shifting value of the previous intermediate roll is lowered by a first preset value, and based on the second actual roll shifting value, the roll shifting value of the next intermediate roll is increased by a first preset value. When the deviation direction is a drive-side deviation, the leveling value of the main hydraulic cylinder is lowered by a second preset value; When the deviation direction is a drive-side deviation, the first rack value of the support roller ASU is lowered by a third preset value, and the seventh rack value of the support roller ASU is raised by a third preset value.
3. The method according to claim 2, characterized in that, The first preset value is the overlap deviation value.
4. The method according to claim 3, characterized in that, The second preset value is calculated according to the following formula: The second preset value is 10 × L, where L is the overlap deviation value.
5. The method according to claim 4, characterized in that, The third preset value is calculated according to the following formula: The third preset value = 2 × L, where L is the overlap deviation value.
6. A control device for stable rolling in a 20-roll mill, characterized in that, The device includes: The determining unit is used to determine the overlap deviation between the strip centerline and the rolling centerline before the first pass of the 20-roll mill is started, and to determine the deviation direction of the strip centerline from the rolling centerline, the deviation direction including working side deviation and drive side deviation. The adjustment unit is used to adjust the upper intermediate roll shifting value, the lower intermediate roll shifting value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction. The control unit is used to control the twenty-roll mill to start rolling according to the adjusted values of the upper intermediate roll shifting, the lower intermediate roll shifting, the main hydraulic cylinder leveling, and the support roll ASU rack value. The device is also used for: Calculate the first actual roll shifting value of the upper intermediate roll of the 20-roll mill and the second actual roll shifting value of the next intermediate roll of the 20-roll mill, wherein the first actual roll shifting value is calculated according to the following formula 1 and the second actual roll shifting value is calculated according to the following formula 2. Official 1: in, X 1 represents the first actual roll shift value. T1 The cone length of the previous intermediate roller. B1 This refers to the distance from the cone angle of the previous intermediate roll to the edge of the strip. W The width of the strip; Official 2: in, X2 This is the second actual roll shift value. T2 The cone length of the next intermediate roller. B2 The distance from the cone angle position of the next intermediate roll to the edge of the strip. W The width of the strip; The step of adjusting the upper intermediate roll deviation value, the lower intermediate roll deviation value, the main hydraulic cylinder leveling value, and the support roll ASU rack value of the 20-roll mill according to the overlap deviation value and the deviation direction includes: When the deviation direction is a working side deviation, the deviation value of the previous intermediate roll is increased by a first preset value based on the first actual roll deviation value, and the deviation value of the next intermediate roll is decreased by a first preset value based on the second actual roll deviation value. When the deviation direction is a working side deviation, the leveling value of the main hydraulic cylinder is increased by the second preset value; When the deviation direction is a working side deviation, the first rack value of the support roller ASU is increased by a third preset value, and the seventh rack value of the support roller ASU is decreased by a third preset value.
7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to perform the operations performed by the method as described in any one of claims 1 to 5.
8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it performs the operations described in any one of claims 1 to 5.