Method and device for optimizing the shape of an intermediate roll

Abstract

This invention discloses a method and apparatus for optimizing the shape of an intermediate roll, relating to the field of roll shape optimization technology. The invention obtains the theoretical starting position for roll shape optimization through simulation, and selects the smaller of the theoretical starting position and the actual wear starting coordinate as the starting coordinate for optimizing the intermediate roll shape curve. This optimizes the intermediate roll shape curve as much as possible, reduces the inter-roller contact pressure at the edge of the roll body's fishtail section, avoids stress concentration at the edge of the support roll, and thus prevents wear.

Description

Technical Field

[0001] This invention relates to the field of roll shape optimization technology, and more particularly to a method and apparatus for optimizing the shape of intermediate rolls. Background Technology

[0002] Six-roll CVC mills offer excellent strip shape control and are widely used in the cold rolling and leveling of strip steel. Currently, the curve shape of the intermediate roll in the CVC mill leads to stress concentration between the rolls in the fishtail section of the CVC curve and the support roll contact area, causing severe wear and even spalling of the support rolls. Therefore, optimizing the intermediate roll CVC shape to avoid stress concentration around the rolls has become a pressing issue in this field. Summary of the Invention

[0003] This invention provides a method and apparatus for optimizing the shape of intermediate rolls (CVC) to avoid stress concentration around the roll body.

[0004] On the one hand, the present invention provides the following technical solution:

[0005] A method for optimizing the shape of an intermediate roll includes:

[0006] A finite element simulation model of the unit is established, the unit including support rollers, intermediate rollers and working rollers, and the actual roller shapes of the support rollers, intermediate rollers and working rollers are plotted into the finite element simulation model in the form of spline curves;

[0007] Obtain the strip width range produced by the unit, the rolling force range corresponding to the strip width range, the bending force range, and the intermediate roll shifting range;

[0008] The strip width range, the rolling force range corresponding to the strip width range, the bending force range, and the intermediate roll shifting range are input into the finite element simulation model to obtain the curve of the inter-roller contact pressure of the unit changing with the coordinates of the support roll body;

[0009] Determine the roller body coordinates at which the inter-roller contact pressure of the support roller fishtail section is the preset pressure, and record them as the theoretical optimization starting coordinates.

[0010] The smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate is used as the intermediate roll shape optimization starting coordinate to optimize the intermediate roll shape curve. The actual wear starting coordinate is the wear start position of the support roll in actual production.

[0011] Preferably, the expression for the intermediate roller profile curve is R(x) = R0 + a1x + a2x 2 +a3x 3 -k(xL / 2+d)n R(x) is the roll shape, R0 is the radius of the intermediate roll, a1, a2, a3 are the formula coefficients calculated according to the traditional cubic CVC roll shape curve formula, x is the coordinate of the intermediate roll body, k is the difference in roll diameter at the middle of the intermediate roll body, L is the length of the intermediate roll body, d is the distance from the CVC roll shape symmetry point to the middle of the intermediate roll body, and n is a positive integer.

[0012] The step of optimizing the intermediate roll profile curve by using the smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate as the intermediate roll profile optimization starting coordinate includes:

[0013] n in the intermediate roll profile curve is determined based on the starting coordinates of the intermediate roll profile optimization.

[0014] Preferably, after determining n in the intermediate roll profile curve based on the intermediate roll profile optimization starting coordinates, the step of using the smaller of the theoretical optimization starting coordinates and the preset actual wear starting coordinates as the intermediate roll profile optimization starting coordinates to optimize the intermediate roll profile curve further includes:

[0015] By taking multiple different values ​​for k in the intermediate roll profile curve, multiple different intermediate roll profile curves are obtained;

[0016] The multiple intermediate roller shape curves are plotted onto the finite element simulation model as spline curves;

[0017] The strip width range with the largest production quantity and the corresponding rolling force range, bending force range and intermediate roll shifting range are input into the finite element simulation model to obtain the roll contact pressure distribution and bearing roll gap shape of the unit.

[0018] The minimum value of k is determined based on the inter-roller contact pressure distribution;

[0019] The maximum value of k is determined based on the shape of the bearing roll gap.

[0020] Preferably, n is 9.

[0021] On the other hand, the present invention also provides the following technical solution:

[0022] An intermediate roll profile optimization device includes:

[0023] The modeling module is used to establish a finite element simulation model of the unit, which includes a support roll, an intermediate roll, and a working roll. The actual roll shapes of the support roll, the intermediate roll, and the working roll are drawn into the finite element simulation model in the form of spline curves.

[0024] The acquisition module is used to acquire the strip width range produced by the unit, the rolling force range corresponding to the strip width range, the bending force range, and the intermediate roll shifting range;

[0025] The simulation module is used to input the strip width range, the rolling force range corresponding to the strip width range, the bending force range and the intermediate roll shifting range into the finite element simulation model to obtain the curve of the inter-roller contact pressure of the unit changing with the coordinates of the support roll body;

[0026] The determination module is used to determine the roller body coordinates when the inter-roller contact pressure of the support roller fishtail section is a preset pressure and record it as the theoretical optimization starting coordinates.

[0027] The optimization module is used to optimize the intermediate roll profile curve by taking the smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate as the intermediate roll profile optimization starting coordinate. The actual wear starting coordinate is the wear start position of the support roll in actual production.

[0028] Preferably, the expression for the intermediate roller profile curve is R(x) = R0 + a1x + a2x 2 +a3x 3 -k(xL / 2+d) n R(x) is the roll shape, R0 is the radius of the intermediate roll, a1, a2, a3 are the formula coefficients calculated according to the traditional cubic CVC roll shape curve formula, x is the coordinate of the intermediate roll body, k is the difference in roll diameter at the middle of the intermediate roll body, L is the length of the intermediate roll body, d is the distance from the CVC roll shape symmetry point to the middle of the intermediate roll body, and n is a positive integer.

[0029] The optimization module is also used to determine n in the intermediate roll profile curve based on the starting coordinates of the intermediate roll profile optimization.

[0030] Preferably, the optimization module is further configured to:

[0031] By taking multiple different values ​​for k in the intermediate roll profile curve, multiple different intermediate roll profile curves are obtained;

[0032] The multiple intermediate roller shape curves are plotted onto the finite element simulation model as spline curves;

[0033] The strip width range with the largest production quantity and the corresponding rolling force range, bending force range and intermediate roll shifting range are input into the finite element simulation model to obtain the roll contact pressure distribution and bearing roll gap shape of the unit.

[0034] The minimum value of k is determined based on the inter-roller contact pressure distribution;

[0035] The maximum value of k is determined based on the shape of the bearing roll gap.

[0036] Preferably, n is 9.

[0037] On the other hand, the present invention also provides the following technical solution:

[0038] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements any of the aforementioned intermediate roller shape optimization methods.

[0039] On the other hand, the present invention also provides the following technical solution:

[0040] A computer-readable storage medium storing a computer program that, when executed by a processor, implements any of the above-described intermediate roller shape optimization methods.

[0041] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0042] This invention obtains the theoretical starting position for roller shape optimization through simulation, and selects the smaller of the theoretical starting position for roller shape optimization and the actual wear starting coordinate as the starting coordinate for intermediate roller shape optimization to optimize the intermediate roller shape curve. This can optimize the intermediate roller shape curve as much as possible, reduce the inter-roller contact pressure at the edge of the fishtail section of the roller body, avoid stress concentration at the edge of the support roller, and thus avoid wear. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 based on these drawings without creative effort.

[0044] Figure 1 This is a flowchart of the intermediate roll shape optimization method in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the finite element simulation model of the unit in an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the rolling force range corresponding to each strip width range in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the intermediate roll shifting range corresponding to each strip width range in an embodiment of the present invention;

[0048] Figure 5This is a schematic diagram of the inter-roller contact pressure distribution before optimization in an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram showing the actual wear condition of the support roller in an embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram of the inter-roller contact pressure distribution before and after optimization in an embodiment of the present invention;

[0051] Figure 8 This is a schematic diagram of the adjustment range of the intermediate roller gap crown in an embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram of the intermediate roller shape before and after optimization in an embodiment of the present invention;

[0053] Figure 10 This is a schematic diagram of the intermediate roller shape optimization device in an embodiment of the present invention. Detailed Implementation

[0054] The embodiments of the present invention provide a method and apparatus for optimizing the shape of intermediate rolls (CVC) to avoid stress concentration around the roll body.

[0055] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] like Figure 1 As shown, the intermediate roll shape optimization method of this embodiment includes:

[0057] Step S1: Establish the finite element simulation model of the unit. The unit includes support rolls, intermediate rolls and working rolls. The actual roll shapes of the support rolls, intermediate rolls and working rolls are drawn into the finite element simulation model in the form of spline curves.

[0058] Step S2: Obtain the strip width range, the rolling force range, the bending force range, and the intermediate roll shifting range produced by the unit;

[0059] Step S3: Input the strip width range, the rolling force range corresponding to the strip width range, the bending force range and the intermediate roll shifting range into the finite element simulation model to obtain the curve of the inter-roller contact pressure of the unit changing with the coordinates of the support roll body;

[0060] Step S4: Determine the roller body coordinates where the inter-roller contact pressure of the support roller fishtail section is the preset pressure, and record them as the theoretical optimization starting coordinates;

[0061] Step S5: Use the smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate as the intermediate roll shape optimization starting coordinate to optimize the intermediate roll shape curve. The actual wear starting coordinate is the wear start position of the support roll in actual production.

[0062] like Figure 2 The image shows the Abaqus finite element simulation models of the support roll, intermediate roll, and work roll. Figure 2 From top to bottom, the roll consists of a support roll, an intermediate roll, and a work roll. The model mainly includes the roll body and the roll diameter section where bearings are installed at both ends of the roll. The structure of the roll diameter section can be appropriately simplified.

[0063] Figure 3 The chart shows the rolling force range corresponding to each strip width range, which are 850-950, 950-1050, 1050-1150, 1150-1250, 1250-1350, 1350-1450, 1450-1550, 1550-1650, 1650-1750, and 1750-1850 mm respectively. Figure 4 The range of intermediate roll shifting for each strip width range.

[0064] Step S3 involves inputting the rolling force range, bending force range, and intermediate roll shifting range for each strip width range into the finite element simulation model. This allows for the calculation of the inter-roll contact pressure distribution for all possible edge stress concentration conditions, i.e., the curve of the inter-roll contact pressure of the unit changing with the coordinates of the support rolls. Figure 5 The distribution of inter-roll contact pressure in operating conditions that may lead to stress concentration between rolls. Figure 5 The A, B, and C in the diagram represent three processes, each corresponding to a range of strip width, rolling force, bending force, and intermediate roll shifting.

[0065] It is understandable that the higher the contact pressure between the rollers, the more easily the support rollers will wear. In this embodiment, it was found that the support rollers are prone to wear when the contact pressure between the rollers exceeds a preset pressure, which is generally 1.5 or 1.6 t / mm. Figure 5 The roller body coordinate corresponding to the preset pressure is approximately 800mm, which is about 200mm from the center of the roller body. The roller body coordinate of the preset pressure for the inter-roller contact pressure is the theoretical starting coordinate for optimization. That is, according to the simulation results, the support roller's fishtail section is prone to wear from 800mm. If the roller shape of the intermediate roller is optimized according to the simulation results, the starting position for optimization should be 800mm.

[0066] However, the starting position for roller shape optimization determined by simulation results may differ from the actual position. It is necessary to compare the starting position for roller shape optimization obtained from simulation with the actual wear start position to determine which is closer to the middle of the roller body, and then select the position closest to the middle of the roller body to start optimizing the roller shape. Figure 6 The actual wear condition of the support roller is shown. It can be seen that the support roller actually starts to wear from about 120mm away from the edge of the roller. Therefore, step S5 will use the theoretical optimization starting coordinates as the starting coordinates for intermediate roller profile optimization to optimize the intermediate roller profile curve.

[0067] In this embodiment, the expression for the intermediate roller profile curve is R(x) = R0 + a1x + a2x 2 +a3x 3 -k(xL / 2+d) n R(x) represents the roll shape, R0 represents the radius of the intermediate roll, a1, a2, and a3 are formula coefficients calculated according to the traditional cubic CVC roll shape curve formula, x represents the coordinates of the intermediate roll body, k represents the difference in roll diameter between the inner and outer sides of the intermediate roll body, L represents the length of the intermediate roll body, d represents the distance from the CVC roll shape symmetry point to the middle of the intermediate roll body, and n is a positive integer. The value of n determines where the intermediate roll shape curve optimization begins, i.e., it determines the starting coordinates of the intermediate roll shape optimization. That is, step S5 includes: determining n in the intermediate roll shape curve based on the starting coordinates of the intermediate roll shape optimization. The closer the starting coordinates of the intermediate roll shape optimization are to the middle of the roll body, the smaller n is; the closer they are to the inner side of the roll body, the larger n is. In this embodiment, it was found that when n = 9, the inner side of the roll body can have a clear roll shape starting at a position 200 mm from the inner side of the roll body, while the middle of the roll body remains basically unchanged. After determining n, the intermediate roll shape curve can be plotted as a spline curve in the finite element simulation model for simulation, as shown below. Figure 7 The optimized roller contact pressure distribution shown indicates that after roller shape optimization, the roller contact pressure at the edge of the fishtail section of the roller body is significantly reduced, which can avoid stress concentration at the side of the support roller and thus prevent wear.

[0068] It is understood that this embodiment obtains the theoretical starting position for roller shape optimization through simulation, and selects the smaller of the theoretical starting position for roller shape optimization and the actual wear starting coordinate as the starting coordinate for intermediate roller shape optimization to optimize the intermediate roller shape curve. This can optimize the intermediate roller shape curve as much as possible, reduce the inter-roller contact pressure at the edge of the fishtail section of the roller body, avoid stress concentration at the edge of the support roller, and thus avoid wear.

[0069] In this embodiment, if the value of k in the intermediate roll profile curve is too small, the uniformity of the inter-roller contact pressure distribution will not meet the requirements; if the value of k is too large, the convexity of the bearing roll gap will not meet the requirements. To determine a suitable range of values ​​for k, after determining n in the intermediate roll profile curve based on the starting coordinates of the intermediate roll profile optimization, step S5 may further include:

[0070] Multiple different values ​​of k in the intermediate roll profile curve are obtained to obtain multiple different intermediate roll profile curves; these multiple intermediate roll profile curves are plotted in the finite element simulation model as spline curves; the strip width range with the largest production quantity and the corresponding rolling force range, bending force range and intermediate roll slippage range are input into the finite element simulation model to obtain the roll contact pressure distribution and bearing roll gap shape of the unit; the minimum value of k is determined according to the roll contact pressure distribution; the maximum value of k is determined according to the bearing roll gap shape.

[0071] This involves selecting all roll shapes that meet the requirements for uniform inter-roll contact pressure distribution based on the uniformity of the inter-roll contact pressure distribution, and determining the lower limit of the coefficient k. Optimizing the roll shape will change the shape of the load-bearing roll gap and the ability to control the plate shape; therefore, it is further necessary to select roll shapes that will not cause plate shape defects based on the impact of the roll shape change on the convexity of the load-bearing roll gap, and determine the upper limit of the coefficient k. For example... Figure 8 The modified roll gap crown adjustment range, which is for the strip width range with the largest production volume, is almost identical to the original roll shape and meets the requirements. The final result is as follows: Figure 9 The optimized low-contact-stress roll shape is shown.

[0072] like Figure 10 As shown, this embodiment also provides an intermediate roll shape optimization device, including:

[0073] The modeling module is used to build a finite element simulation model of the unit, which includes support rolls, intermediate rolls and working rolls. The actual roll shapes of the support rolls, intermediate rolls and working rolls are drawn into the finite element simulation model as spline curves.

[0074] The acquisition module is used to acquire the strip width range, the rolling force range, the bending force range, and the intermediate roll shifting range produced by the unit.

[0075] The simulation module is used to input the strip width range, the rolling force range corresponding to the strip width range, the bending roll force range, and the intermediate roll shifting range into the finite element simulation model to obtain the curve of the inter-roll contact pressure of the unit changing with the coordinates of the support roll body;

[0076] The determination module is used to determine the roller body coordinates when the inter-roller contact pressure of the support roller fishtail section is the preset pressure and record it as the theoretical optimization starting coordinates.

[0077] The optimization module is used to optimize the intermediate roll profile curve by taking the smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate as the starting coordinate for intermediate roll profile optimization. The actual wear starting coordinate is the starting position of wear of the support roll in actual production.

[0078] Furthermore, the expression for the intermediate roll profile curve is R(x) = R0 + a1x + a2x 2 +a3x 3 -k(xL / 2+d) n R(x) is the roll shape, R0 is the radius of the intermediate roll, a1, a2, a3 are the formula coefficients calculated according to the traditional cubic CVC roll shape curve formula, x is the coordinate of the intermediate roll body, k is the difference in roll diameter between the middle and lower parts of the intermediate roll body, L is the length of the intermediate roll body, d is the distance from the CVC roll shape symmetry point to the middle part of the intermediate roll body, and n is a positive integer.

[0079] The optimization module can also be used to determine n in the intermediate roll profile curve based on the starting coordinates of the intermediate roll profile optimization.

[0080] Furthermore, the optimization module can also be used for:

[0081] By taking multiple different values ​​for k in the intermediate roll profile curve, multiple different intermediate roll profile curves can be obtained;

[0082] Multiple intermediate roller profile curves are plotted onto the finite element simulation model as spline curves;

[0083] By inputting the range of strip widths with the largest production volume and the corresponding range of rolling force, bending force, and intermediate roll shifting into the finite element simulation model, the distribution of inter-roll contact pressure and the shape of the bearing roll gap of the unit can be obtained.

[0084] The minimum value of k is determined based on the distribution of contact pressure between the rollers;

[0085] The maximum value of k is determined based on the shape of the bearing roll gap.

[0086] Furthermore, n can be 9.

[0087] Based on the same inventive concept as the intermediate roll shape optimization method described above, this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of any of the methods described above for intermediate roll shape optimization.

[0088] The bus architecture (represented by a bus) can include any number of interconnected buses and bridges, linking various circuits including one or more processors (represented by a processor) and memory (represented by memory). The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface between the bus and receivers and transmitters. Receivers and transmitters can be the same element, a transceiver, providing a unit for communicating with various other devices over a transmission medium. The processor is responsible for managing the bus and general processing, while memory can be used to store data used by the processor during operation.

[0089] Since the electronic device described in this embodiment is the electronic device used to implement the intermediate roller shape optimization method in this embodiment of the invention, those skilled in the art can understand the specific implementation method and various variations of the electronic device in this embodiment based on the intermediate roller shape optimization method described in this embodiment of the invention. Therefore, how the electronic device implements the method in this embodiment of the invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the intermediate roller shape optimization method in this embodiment of the invention falls within the scope of protection of this invention.

[0090] Based on the same inventive concept as the above-described intermediate roll shape optimization method, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements any of the above-described intermediate roll shape optimization methods.

[0091] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0092] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of 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, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0093] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0094] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0095] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0096] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for optimizing the shape of an intermediate roll, characterized in that, include: A finite element simulation model of the unit is established, the unit including support rollers, intermediate rollers and working rollers, and the actual roller shapes of the support rollers, intermediate rollers and working rollers are plotted into the finite element simulation model in the form of spline curves; Obtain the strip width range produced by the unit, the rolling force range corresponding to the strip width range, the bending force range, and the intermediate roll shifting range; The strip width range, the rolling force range corresponding to the strip width range, the bending force range, and the intermediate roll shifting range are input into the finite element simulation model to obtain the curve of the inter-roller contact pressure of the unit changing with the coordinates of the support roll body; The roller body coordinates at which the contact pressure between the support roller's fishtail section and the intermediate roller is set to a preset pressure are recorded as the theoretical optimization starting coordinates. The smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate is used as the intermediate roll shape optimization starting coordinate to optimize the intermediate roll shape curve. The actual wear starting coordinate is the wear start position of the support roll in actual production.

2. The intermediate roll shape optimization method as described in claim 1, characterized in that, The expression for the intermediate roll profile curve is as follows: R(x) is the roller radius value of the intermediate roller at the roller body coordinate x, R0 is the radius of the intermediate roller, a1, a2, a3 are the formula coefficients calculated according to the traditional cubic CVC roller profile curve formula, x is the roller body coordinate of the intermediate roller, k is the difference in roller diameter at the middle of the roller body of the intermediate roller, L is the length of the roller body of the intermediate roller, d is the distance from the CVC roller profile symmetry point to the middle of the roller body of the intermediate roller, and n is a positive integer; The step of optimizing the intermediate roll profile curve by using the smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate as the intermediate roll profile optimization starting coordinate includes: n in the intermediate roll profile curve is determined based on the starting coordinates of the intermediate roll profile optimization.

3. The intermediate roll shape optimization method as described in claim 2, characterized in that, After determining n in the intermediate roll profile curve based on the intermediate roll profile optimization starting coordinates, the step of using the smaller of the theoretical optimization starting coordinates and the preset actual wear starting coordinates as the intermediate roll profile optimization starting coordinates to optimize the intermediate roll profile curve further includes: By taking multiple different values ​​for k in the intermediate roll profile curve, multiple different intermediate roll profile curves can be obtained; The multiple intermediate roller shape curves are plotted onto the finite element simulation model as spline curves; The strip width range with the largest production quantity and the corresponding rolling force range, bending force range and intermediate roll shifting range are input into the finite element simulation model to obtain the roll contact pressure distribution and bearing roll gap shape of the unit. The minimum value of k is determined based on the inter-roller contact pressure distribution; The maximum value of k is determined based on the shape of the bearing roll gap.

4. The intermediate roll shape optimization method as described in claim 2, characterized in that, n is 9.

5. A device for optimizing the shape of an intermediate roller, characterized in that, include: The modeling module is used to establish a finite element simulation model of the unit, which includes a support roll, an intermediate roll, and a working roll. The actual roll shapes of the support roll, the intermediate roll, and the working roll are drawn into the finite element simulation model in the form of spline curves. The acquisition module is used to acquire the strip width range produced by the unit, the rolling force range corresponding to the strip width range, the bending force range, and the intermediate roll shifting range; The simulation module is used to input the strip width range, the rolling force range corresponding to the strip width range, the bending force range and the intermediate roll shifting range into the finite element simulation model to obtain the curve of the inter-roller contact pressure of the unit changing with the coordinates of the support roll body; The determination module is used to determine the roller body coordinates when the contact pressure between the support roller fishtail section and the intermediate roller is a preset pressure, and record it as the theoretical optimization starting coordinates; The optimization module is used to optimize the intermediate roll profile curve by taking the smaller of the theoretical optimization starting coordinate and the preset actual wear starting coordinate as the intermediate roll profile optimization starting coordinate. The actual wear starting coordinate is the wear start position of the support roll in actual production.

6. The intermediate roll shape optimization device as described in claim 5, characterized in that, The expression for the intermediate roll profile curve is as follows: R(x) is the roller radius value of the intermediate roller at the roller body coordinate x, R0 is the radius of the intermediate roller, a1, a2, a3 are the formula coefficients calculated according to the traditional cubic CVC roller profile curve formula, x is the roller body coordinate of the intermediate roller, k is the difference in roller diameter at the middle of the roller body of the intermediate roller, L is the length of the roller body of the intermediate roller, d is the distance from the CVC roller profile symmetry point to the middle of the roller body of the intermediate roller, and n is a positive integer; The optimization module is also used to determine n in the intermediate roll profile curve based on the starting coordinates of the intermediate roll profile optimization.

7. The intermediate roll shape optimization device as described in claim 6, characterized in that, The optimization module is also used for: By taking multiple different values ​​for k in the intermediate roll profile curve, multiple different intermediate roll profile curves can be obtained; The multiple intermediate roller shape curves are plotted onto the finite element simulation model as spline curves; The strip width range with the largest production quantity and the corresponding rolling force range, bending force range and intermediate roll shifting range are input into the finite element simulation model to obtain the roll contact pressure distribution and bearing roll gap shape of the unit. The minimum value of k is determined based on the inter-roller contact pressure distribution; The maximum value of k is determined based on the shape of the bearing roll gap.

8. The intermediate roll shape optimization device as described in claim 6, characterized in that, n is 9.

9. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the intermediate roll shape optimization method according to any one of claims 1-4.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the intermediate roll shape optimization method according to any one of claims 1-4.

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