A method, device, medium and equipment for designing a middle roll profile

Abstract

The application relates to the technical field of rolls, and discloses a method, a device, a medium and equipment for designing a roll shape of an intermediate roll. The method comprises the following steps: acquiring a middle roll body length; acquiring a roll shape length; acquiring a crown adjustment range; acquiring a roll diameter difference; and designing the roll shape of the intermediate roll according to the middle roll body length, the roll shape length, the crown adjustment range and the roll diameter difference. Compared with the traditional method, the crown adjustment range is increased compared with the original roll shape, the inter-roll contact pressure is increased, the rolling force deviation is reduced, and the strip steel deviation problem is improved.

Description

Technical Field

[0001] This application relates to the field of rolling mill technology, and in particular to a method, apparatus, medium, and equipment for designing the shape of an intermediate roll. Background Technology

[0002] The traditional CVC roll profile is designed using a cubic polynomial. The adjustment range of the roll crown of this roll profile decreases rapidly as the strip width decreases. Therefore, the roll travel is significantly higher than that of other strip specifications during the roll travel process. This results in more severe rolling force deviation and strip deviation problems in the mill. Summary of the Invention

[0003] The purpose of this application is to provide a method, device, medium and equipment for designing intermediate roll shape, which solves the problems of rolling force deviation and deviation caused by excessive roll travel in traditional CVC roll shape.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to one aspect of the embodiments of this application, a method for designing the shape of an intermediate roll is provided. The method includes: obtaining the length of the middle roll body; obtaining the roll shape length; obtaining the crown adjustment range; obtaining the roll diameter difference; and designing the shape of the intermediate roll based on the length of the middle roll body, the roll shape length, the crown adjustment range, and the roll diameter difference.

[0006] In some embodiments, the method for obtaining the roll profile length includes: obtaining an optimal roll travel; and determining the roll profile length based on the optimal roll travel.

[0007] In some embodiments, the method for obtaining the optimal roll travel includes: obtaining strip steel of multiple steel grades and specifications, and conducting multiple roll travel experiments on each steel grade and specification of strip steel; selecting the optimal roll travel from all the roll travel experiments.

[0008] In some embodiments, the method for obtaining the convexity adjustment range includes: establishing a second coordinate system with the center point of the roll curve as the origin in the original coordinate system; obtaining a transformation formula based on the original coordinate system and the second coordinate system; obtaining the upper roll shifting function and the lower roll shifting function after roll shifting based on the transformation formula; obtaining the roll gap function based on the upper roll shifting function and the lower roll shifting function; and calculating the second-order convexity function and the fourth-order convexity function based on the roll gap function.

[0009] In some embodiments, the transformation relationship is expressed as follows:

[0010] R(X) = f(X-S0) + D0;

[0011] The function for the upward roller movement is expressed by the following formula:

[0012] f a (x) = f(xs);

[0013] The function for the lower roller is expressed by the following formula:

[0014] f b (x) = f(x+s);

[0015] The roll gap function is expressed by the following formula:

[0016] g(x,s)=f a (x)-f b (x);

[0017] The quadratic convexity function is expressed by the following formula:

[0018]

[0019] The quartic convexity function is expressed by the following formula:

[0020]

[0021] Where R is the roll shape function in the original coordinate system, f is the roll shape function in the second coordinate system, S0 is the abscissa distance between the original coordinate system and the second coordinate system, D0 is the ordinate distance between the original coordinate system and the second coordinate system, X is the abscissa of the roll body, s is the roll slip distance, and f a f is the upper roller curve function. b denoted as the lower roll profile curve function, g as the roll gap function, CW2 as the second-order convexity function, CW4 as the fourth-order convexity function, and B as the strip width.

[0022] In some embodiments, in designing the intermediate roll shape based on the middle roll body length, roll shape length, crown adjustment range, and roll diameter difference, the method further includes: establishing a roll shape library based on the middle roll body length, roll shape length, crown adjustment range, and roll diameter difference; and selecting the optimal intermediate roll shape from the roll shape library.

[0023] In some embodiments, the method for selecting the optimal intermediate roll shape from the roll shape library further includes: obtaining a crown adjustment range; obtaining an inter-roller contact pressure; and selecting the intermediate roll shape based on the crown adjustment range and the inter-roller contact pressure.

[0024] According to one aspect of the embodiments of this application, an intermediate roll shape design device is provided. The device includes: a roll body length module for obtaining the length of the intermediate roll body; a roll shape length module for obtaining the roll shape length; a crown module for obtaining the crown adjustment range; a roll diameter difference module for obtaining the roll diameter difference; and a design module for designing the intermediate roll shape based on the intermediate roll body length, the roll shape length, the crown adjustment range, and the roll diameter difference.

[0025] According to one aspect of the embodiments of this application, a computer-readable medium is provided having a computer program stored thereon, which, when executed by a processor, implements the intermediate roll profile design method as described in the above embodiments.

[0026] According to one aspect of the embodiments of this application, an electronic device is provided, including: one or more processors; and a memory for storing executable instructions of the processors, which, when executed by the one or more processors, cause the one or more processors to implement the intermediate roller shape design method as described in the above embodiments.

[0027] Compared with the prior art, the significant beneficial effects of the technical solution of this application are as follows: By establishing a roll shape library, the optimal intermediate roll shape is selected from the roll shape library according to the crown adjustment range and the inter-roll contact pressure. Compared with the traditional method, the crown adjustment range of this application is increased to a certain extent, the inter-roll contact pressure is increased to a certain extent, the rolling force deviation is reduced, and the problem of strip deviation is improved.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0029] The above and other features and advantages of this application will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0030] Figure 1 A flowchart according to one embodiment of this application is shown;

[0031] Figure 2 A simplified diagram of an intermediate roller profile design apparatus according to an embodiment of this application is shown;

[0032] Figure 3 A schematic diagram of the structure of a computer system of an electronic device according to an embodiment of the present application is shown. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0036] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0037] To enable those skilled in the art to better understand this application, the following will be combined with Figures 1 to 3 The details of this application are described in detail.

[0038] According to some embodiments, this application provides an intermediate roll profile design method, the method comprising:

[0039] Step 101: Obtain the length of the middle roller body;

[0040] Step 102, obtain the roller length;

[0041] Step 103: Obtain the convexity adjustment range;

[0042] Step 104: Obtain the roller diameter difference;

[0043] Step 105: Design the intermediate roll shape based on the length of the middle roll body, the roll shape length, the crown adjustment range, and the roll diameter difference.

[0044] Based on the above embodiments, in step 101, the length of the middle roll body is obtained by measurement from the roll, the length of the middle roll body is the length of the middle part of the roll, the edge of the roll is designed with a special curve transition, and the length of the middle roll body is the part of the roll that actually rolls the strip.

[0045] Furthermore, in step 102, the method for obtaining the roller length includes:

[0046] Step 1021: Obtain the optimal roller travel;

[0047] Step 1022: Determine the roll length based on the optimal roll travel.

[0048] In step 1021, the method for obtaining the optimal roller travel further includes:

[0049] Step 10211: Obtain strip steel of multiple steel grades and specifications, and conduct multiple roll rolling experiments on strip steel of each steel grade and specification.

[0050] Step 10212: Select the optimal roll travel in all the roll rolling experiments.

[0051] By conducting a survey and statistical analysis of the on-site roll shifting process, the actual roll shifting stroke under various specifications was determined, and experiments were conducted to analyze the deviation and rolling force deviation that occurred during the intermediate roll shifting process. Through continuous experiments, the optimal roll shifting stroke for this unit was determined.

[0052] Furthermore, in step 103, when obtaining the convexity adjustment range, the method further includes:

[0053] Step 1031: Establish a second coordinate system with the center point of the roller curve as the origin in the original coordinate system;

[0054] Step 1032: Obtain the transformation formula based on the original coordinate system and the second coordinate system;

[0055] Step 1033: Obtain the upper roll shifting function and lower roll shifting function after the roll shifting according to the transformation relationship;

[0056] Step 1034: Obtain the roll gap function based on the upper roll gap function and the lower roll gap function;

[0057] Step 1035: Calculate the second-order convexity function and the fourth-order convexity function based on the roll gap function.

[0058] Furthermore, in step 104, the method of obtaining the roller diameter difference includes selecting the most ideal roller diameter difference based on multiple sets of experimental data through continuous experiments on site.

[0059] Furthermore, in step 105, when designing the intermediate roll shape based on the middle roll body length, roll shape length, crown adjustment range, and roll diameter difference, the method further includes:

[0060] Step 1051: Establish a roller shape library based on the middle roller body length, roller shape length, crown adjustment range, and roller diameter difference;

[0061] Step 1052: Select the optimal intermediate roll shape from the roll shape library.

[0062] In step 1052, during the selection of the optimal intermediate roll shape from the roll shape library, the method further includes:

[0063] Step 10521, obtain the convexity adjustment range;

[0064] Step 10522: Obtain the contact pressure between the rollers;

[0065] Step 10523: Screen the intermediate roll shape according to the crown adjustment range and the inter-roller contact pressure.

[0066] Among them, the crown adjustment range is the actual crown control range during the rolling process. Both the inter-roll contact pressure and the crown adjustment range are calculated under loaded conditions using finite element simulation tools.

[0067] According to some embodiments, in steps 1031 to 1035, the transformation relationship adopts the following formula:

[0068] R(X) = f(X-S0) + D0;

[0069] The function for the upward roller movement is expressed by the following formula:

[0070] fa(x) = f(xs);

[0071] The function for the lower roller is expressed by the following formula:

[0072] fb(x) = f(x+s);

[0073] The roll gap function is expressed by the following formula:

[0074] g(x,s) = fa(x) - fb(x);

[0075] The quadratic convexity function is expressed by the following formula:

[0076]

[0077] The quartic convexity function is expressed by the following formula:

[0078]

[0079] Where R is the roll shape function in the original coordinate system, f is the roll shape function in the second coordinate system, S0 is the abscissa distance between the original coordinate system and the second coordinate system, D0 is the ordinate distance between the original coordinate system and the second coordinate system, X is the abscissa of the roll body, s is the roll slip distance, and f a f is the upper roller curve function. b denoted as the lower roll profile curve function, g as the roll gap function, CW2 as the second-order convexity function, CW4 as the fourth-order convexity function, and B as the strip width.

[0080] The fundamental function f(x) centered on the CVC curve is designed. Since f(x) is an odd function, a polynomial is used in the design process, retaining only the odd-degree terms. As shown below:

[0081] f(x) = a1x + a3x 3 +a9x 9

[0082] The roller profile curve has an additional 9th-order term compared to the traditional CVC roller profile curve. This optimizes the roller profile around the edge, making the transition between it and the outermost edge as smooth as possible.

[0083] The intermediate roll CVC curve is composed of a cubic curve. The coefficients of the quadratic and cubic terms mainly determine the range of strip crown adjustment, which in turn determine the basic shape of the CVC roll. The coefficient of the linear term mainly determines the size of the diameter difference of the support rolls.

[0084] In some cases, considering that the chamfer depth of the support roller used on site is 200mm, the un-chamfered section in the middle is 1570mm. Therefore, the intermediate roller is designed with a width of 1450mm and 1500mm.

[0085] The upstream frame is designed with a short-stroke 3SVC roll shape based on a roll travel range of -150 to 150 mm. In this case, only the middle roll body length of 2270 mm (total length 2370 mm) is the actual roll shape. The roll shape is designed with a roll body length of 2270 mm, a roll travel of 150 mm, and a crown adjustment range from 0 μm to 900 μm.

[0086] The maximum actual strip width in production is 1870 mm. Considering the actual travel of the 150 mm shifting roll, the roll shape within 100 mm of the edge of the intermediate roll has almost no impact on the strip. Therefore, the shaping begins 100 mm from the edge of the roll.

[0087] The original roll shape had a total roll length of 2370 mm and a crown adjustment range of 0–900 μm. After modification, the actual roll length crown adjustment range within the roll shifting range is 0–900 μm. With the scheme proposed in this application, under the same roll shifting conditions, the crown adjustment range is increased compared to the original roll shape. The inter-roller contact pressure also increases to some extent.

[0088] The following describes an embodiment of the apparatus of this application, which can be used to execute the intermediate roll shape design method in the above embodiments of this application.

[0089] Figure 2 A simplified diagram of an intermediate roll profile design apparatus 300 according to one embodiment of this application is shown. The intermediate roll profile design apparatus 300 includes:

[0090] Roll body length module 301 is used to obtain the length of the middle roll body;

[0091] Roll length module 302 is used to obtain the roll length;

[0092] Convexity module 303 is used to obtain the convexity adjustment range;

[0093] Roll diameter difference module 304 is used to obtain the roll diameter difference;

[0094] Design module 305 is used to design the intermediate roll shape based on the length of the middle roll body, the roll shape length, the crown adjustment range, and the roll diameter difference.

[0095] Figure 3 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.

[0096] It should be noted that, Figure 3 The computer system 300 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0097] like Figure 3 As shown, the computer system 300 includes a Central Processing Unit (CPU) 301, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 302 or programs loaded from storage portion 308 into Random Access Memory (RAM) 303, such as executing the intermediate roller shape design method described in the above embodiments. The RAM 303 also stores various programs and data required for system operation. The CPU 301, ROM 302, and RAM 303 are interconnected via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0098] The following components are connected to I / O interface 305: an input section 306 including a keyboard, mouse, etc.; an output section 307 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 308 including a hard disk, etc.; and a communication section 309 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 309 performs communication processing via a network such as the Internet. A drive 310 is also connected to I / O interface 305 as needed. Removable media 311, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 310 as needed so that computer programs read from them can be installed into storage section 308 as needed.

[0099] 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 309, and / or installed from removable medium 311. When the computer program is executed by central processing unit (CPU) 301, it performs various functions defined in the system of this application.

[0100] 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.

[0101] 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.

[0102] The modules described in the embodiments of this application can be implemented in software or hardware, and can also be located in a processor. The names of these modules do not necessarily limit the module itself.

[0103] In another aspect, this application also provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the intermediate roller shaping method described in the above embodiments.

[0104] In another aspect, this application also provides a computer-readable medium, which may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the electronic device. The computer-readable medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to implement the intermediate roller shape design method described in the above embodiments.

[0105] 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.

[0106] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product. This software product can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, and includes several instructions to cause a computing device (such as a personal computer, server, touch terminal, or network device, etc.) to execute the intermediate roller shape design method described in the above embodiments.

[0107] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0108] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for designing the shape of an intermediate roll, characterized in that, The method includes: Obtain the length of the middle roller body; Obtain the roll length; Obtain the convexity adjustment range; Obtain the roller diameter difference; The intermediate roll shape is designed based on the length of the middle roll body, the roll shape length, the crown adjustment range, and the roll diameter difference. A roller shape library is established based on the central roller body length, roller shape length, crown adjustment range, and roller diameter difference. Select the optimal intermediate roll shape from the roll shape library; The process of selecting the optimal intermediate roll shape from the roll shape library also includes: Obtain the convexity adjustment range; Obtain the contact pressure between the rollers; The intermediate roll shape is selected based on the crown adjustment range and the inter-roller contact pressure; The process of obtaining the crown adjustment range includes: establishing a second coordinate system with the center point of the roll curve as the origin in the original coordinate system; obtaining the transformation relationship based on the original coordinate system and the second coordinate system; obtaining the upper roll shifting function and the lower roll shifting function after roll shifting based on the transformation relationship; obtaining the roll gap function based on the upper roll shifting function and the lower roll shifting function; and calculating the second-order crown function and the fourth-order crown function based on the roll gap function. The transformation relationship is expressed by the following formula: ; The function for the upward roller movement is expressed by the following formula: ; The function for the downward-shifting roller is expressed by the following formula: ; The roll gap function is expressed by the following formula: ; The quadratic convexity function is expressed by the following formula: ; The quartic convexity function is expressed by the following formula: ; in, The roller shape function of the original coordinate system. The roller shape function in the second coordinate system. Let x be the x-coordinate distance between the original coordinate system and the second coordinate system. The distance between the ordinates of the original coordinate system and the second coordinate system is denoted as . The horizontal axis of the roller body The distance between the rollers. For the upper roller-shaped curve function, For the lower roller profile curve function, For the roll gap function, It is a quadratic convexity function. It is a fourth-order convexity function. The width of the strip; The fundamental function designed around the CVC curve Design, Since it is an odd function, when using a polynomial in the design process, only terms of odd degree are retained, as shown below: Among them, the roller profile curve has an additional 9-degree term compared to the traditional CVC roller profile curve.

2. The method according to claim 1, characterized in that, In obtaining the roll length, the method includes: To obtain the optimal roller travel; The roll length is determined based on the optimal roll travel. Obtaining the optimal roller travel includes: Obtain strip steel of multiple steel grades and specifications, and conduct multiple roll rolling experiments on strip steel of each steel grade and specification. The optimal roll travel was selected from all the roll rolling experiments described.

3. A device for designing the shape of an intermediate roller, characterized in that, The device includes: The roller body length module is used to obtain the length of the middle roller body; Roll length module, used to obtain the roll length; The convexity module is used to obtain the convexity adjustment range; Roll diameter difference module, used to obtain the roll diameter difference; The design module is used to design the intermediate roll shape based on the length of the middle roll body, the roll shape length, the crown adjustment range, and the roll diameter difference. A roller shape library is established based on the central roller body length, roller shape length, crown adjustment range, and roller diameter difference. Select the optimal intermediate roll shape from the roll shape library; The process of selecting the optimal intermediate roll shape from the roll shape library also includes: Obtain the convexity adjustment range; Obtain the contact pressure between the rollers; The intermediate roll shape is selected based on the crown adjustment range and the inter-roller contact pressure; The process of obtaining the crown adjustment range includes: establishing a second coordinate system with the center point of the roll curve as the origin in the original coordinate system; obtaining the transformation relationship based on the original coordinate system and the second coordinate system; obtaining the upper roll shifting function and the lower roll shifting function after roll shifting based on the transformation relationship; obtaining the roll gap function based on the upper roll shifting function and the lower roll shifting function; and calculating the second-order crown function and the fourth-order crown function based on the roll gap function. The transformation relationship is expressed by the following formula: ; The function for the upward roller movement is expressed by the following formula: ; The function for the downward-shifting roller is expressed by the following formula: ; The roll gap function is expressed by the following formula: ; The quadratic convexity function is expressed by the following formula: ; The quartic convexity function is expressed by the following formula: ; in, The roller shape function of the original coordinate system. The roller shape function in the second coordinate system. Let x be the x-coordinate distance between the original coordinate system and the second coordinate system. The distance between the ordinates of the original coordinate system and the second coordinate system is denoted as . The horizontal axis of the roller body The distance between the rollers. For the upper roller-shaped curve function, For the lower roller profile curve function, For the roll gap function, It is a quadratic convexity function. It is a fourth-order convexity function. For strip width; for the basic function designed centered on the CVC curve. Design, Since it is an odd function, when using a polynomial in the design process, only terms of odd degree are retained, as shown below: Among them, the roller profile curve has an additional 9-degree term compared to the traditional CVC roller profile curve.

4. 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 described in any one of claims 1 to 2.

5. An electronic device, characterized in that, The electronic device includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation performed by the method as described in any one of claims 1 to 2.

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