Tire sidewall modeling inverse arc parameterization design method, system, equipment and medium

Abstract

The invention belongs to the technical field of tire manufacturing, and particularly relates to a sidewall modeling inverse arc parameterization design method, system and equipment and a medium, the arc modeling of the sidewall of a tire is divided into a plurality of small sections, and the dynamic radius corresponding to each differential point is determined according to the circle center position and radius parameters specified or calculated by a user. And the arc length of each section is adjusted based on the dynamic radius, smooth transition between the sections is ensured through angle adjustment, and finally a flattened straight line or a new arc shape is formed. According to the method, the design efficiency is remarkably improved, the time and errors of manual operation are reduced, and the working process is optimized. Meanwhile, rapid iteration and optimization design can be achieved, the overall quality of the design is improved, the design result is more accurate and consistent, and the method can be easily expanded to different specifications. The innovation not only solves the problem of insufficient precision in the prior art, but also greatly improves the flexibility and efficiency of design work.

Description

Technical Field

[0001] The present invention belongs to the technical field of tire manufacturing, and in particular relates to a method, system, equipment and medium for parametric design of inverse arc of sidewall shape. Background Art

[0002] In the field of tire design, traditional sidewall styling methods often rely on manual drawing and adjustment of arc patterns. Designers draw patterns based on design data provided by the customer or their own data. However, this traditional method has significant limitations. Specifically, designers need to analyze and process each curve one by one, which is not only time-consuming and labor-intensive, but also extremely inefficient when faced with large amounts of curve data. The speed of manual operation is limited by personal experience and proficiency and cannot be compared with modern automated processing methods. Due to the subjectivity and instability of manual operation, traditional curve flattening methods often fail to achieve ideal accuracy. In addition, traditional methods are usually designed for specific types of curves or surfaces, and their adaptability to complex and changing curve shapes is poor. When faced with new or special curve flattening requirements, a lot of modifications and adjustments may be required, or even the flattening task may not be completed.

[0003] A major issue with existing technologies is the inability to achieve high-precision conversion when converting curved patterns to straight lines. This results in inaccurate and error-prone subsequent scaling to different specifications, resulting in low efficiency and errors. For example, when manually flattening a curved pattern, it is difficult to ensure a smooth transition between each differential point, thus affecting the quality and consistency of the overall design. Summary of the Invention

[0004] The purpose of the present invention is to provide a method, system, equipment and medium for the parametric design of the inverse arc of the sidewall shape, which not only solves the problem of insufficient accuracy in the existing technology, but also greatly improves the flexibility and efficiency of the design work.

[0005] To achieve the above object, the present invention proposes a method for parametric design of a sidewall profile using an inverse arc, comprising the following steps:

[0006] The arc shape of the tire sidewall is differentiated into multiple small segments; the dynamic radius corresponding to each differential point is determined based on the center position and radius parameters specified or calculated by the user; the length of each arc segment is adjusted based on the dynamic radius, and the angle is adjusted to ensure a smooth transition between the segments, ultimately forming a flattened straight line or a new arc shape.

[0007] Preferably, the differentiation process is performed in the form of differential mapping points.

[0008] Preferably, determining the dynamic radius corresponding to each differential point includes:

[0009] When determining the dynamic radius, a coefficient formula related to the target arc or line is used: Lflat = Loriginal x k, where k is the dynamic ratio.

[0010] Preferably, the method further comprises: adjusting the angle while adjusting the arc length, so as to ensure that the angle change at the end of each segment meets expectations.

[0011] Preferably, the method further includes: converting the processed arc shape into a standardized font library.

[0012] Another aspect of the present invention provides a parametric design system for inverse arc sidewall shaping, which is characterized by comprising:

[0013] Differentiation module, used to differentiate the arc shape into multiple small segments;

[0014] The dynamic radius determination module determines the dynamic radius corresponding to each differential point based on the center position and radius parameters;

[0015] Arc length and angle adjustment module, which adjusts the length of each arc segment based on the dynamic radius and performs angle adjustment;

[0016] The font library generation module converts the processed shapes into a standardized font library.

[0017] On the other hand, the present invention proposes a terminal device, which includes a processor, a memory, and a sidewall shape inverse arc parametric design program stored in the memory and executable by the processor, wherein when the sidewall shape inverse arc parametric design program is executed by the processor, the steps of the sidewall shape inverse arc parametric design method as described above are implemented.

[0018] On the other hand, the present invention proposes a computer-readable storage medium, which stores a sidewall shape inverse arc parametric design program. When the sidewall shape inverse arc parametric design program is executed by a processor, the steps of the sidewall shape inverse arc parametric design method as described above are implemented.

[0019] Technical effects and advantages of the present invention: Compared with the prior art, the method, system, device and medium for parametric design of inverse arc sidewall shaping proposed by the present invention have the following advantages:

[0020] The present invention differentiates the arc shape of the tire sidewall into multiple small segments and determines the dynamic radius corresponding to each differential point based on the center position and radius parameters specified or calculated by the user. The length of each arc segment is adjusted based on the dynamic radius, and a smooth transition between segments is ensured through angle adjustment, ultimately forming a flattened straight line or a new arc shape. This method significantly improves design efficiency, reduces manual operation time and errors, and optimizes the workflow. At the same time, it enables rapid iteration and optimization of the design, improving the overall quality of the design, making the design results more accurate, consistent, and easy to expand to different specifications. This innovation not only solves the problem of insufficient precision in the existing technology, but also greatly improves the flexibility and efficiency of the design work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flow chart of the inverse arc parameterized design method for sidewall shaping of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the straight line or new arc shape after flattening of the present invention;

[0023] Figure 3 It is a structural diagram of the terminal device of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] The present invention provides a method for designing the inverse arc parameter of the sidewall shape. Figure 1 As shown, the following steps are included:

[0026] Step 1: Differentiate the curved shape of the tire sidewall into multiple small segments; this process is performed using differential mapping points to ensure high accuracy and comprehensive understanding of the original shape.

[0027] Step 2: Determine the dynamic radius corresponding to each differential point based on the center position and radius parameters specified or calculated by the user; when determining the dynamic radius, the coefficient formula related to the target arc or line is used: Lflat = Loriginal × k, where k is the dynamic ratio.

[0028] The specific implementation of the differential mapping point technology is as follows:

[0029] Select the arc shape to be processed:

[0030] First, the user or system selects the tire sidewall arc shape to be processed from the design data. This design data can be specific design requirements provided by the customer or standard patterns extracted from the designer's own database.

[0031] Determine the initial parameters:

[0032] The user needs to specify or the system automatically generates some initial parameters, including but not limited to the target circle center position, flattening radius, etc. These parameters will serve as the basis for subsequent differentiation and adjustment.

[0033] Differential mapping point generation:

[0034] The selected arc shape is differentiated into multiple small segments using a high-precision algorithm. Each small segment corresponds to a differential mapping point. These mapping points are like stars in a coordinate system, providing a comprehensive and detailed understanding of the original shape.

[0035] Each differential mapping point contains not only its position on the arc, but also the dynamic radius corresponding to that position. The dynamic radius is determined based on the circle center position and radius parameters, which are preset or calculated.

[0036] Data storage and management:

[0037] The data of all differential mapping points is stored in a structured database for use in subsequent steps. The data structure of each mapping point generally includes: position coordinates (x, y), dynamic radius value, corresponding original arc length, and angle change between adjacent mapping points.

[0038] like Figure 2 As shown, it is assumed that: arc L is the arc to be flattened;

[0039] Point A: a differential point on the arc;

[0040] Center of circle: the flattened center specified by the user;

[0041] Specified radius: the flattening radius input by the user;

[0042] Point A': the corresponding point of point A in the polar coordinate system with an angle of α and a radius of the arc L

[0043] Dynamic ratio K: is a coefficient related to dynamic radius / specified radius;

[0044] Formula: Lflat=Loriginal×k;

[0045] The “length after flattening” is recorded as Lflat, the “length before flattening” is recorded as Loriginal, and the “dynamic ratio” is recorded as k.

[0046] After the differential mapping points are generated, the next steps are to perform further processing based on these mapping points, including determining the dynamic radius, adjusting the arc length and angle, etc. These steps will be described in detail in the subsequent specific implementations.

[0047] By using this differential mapping point technology, the present invention can achieve highly accurate processing of complex curved shapes and provide a solid foundation for subsequent flattening operations. This method not only improves design efficiency, reduces manual operation time and errors, but also significantly improves the overall quality and consistency of the design.

[0048] Step 3: Adjust the length of each arc segment based on the dynamic radius, and ensure a smooth transition between segments by adjusting the angle, ultimately forming a flattened straight line or a new arc shape;

[0049] After generating the differential mapping points for the tire sidewall's curved shape, the next critical step is adjusting the length of each arc segment based on a dynamic radius and ensuring a smooth transition between segments through fine-tuning of angles. This process involves not only complex mathematical calculations but also highly precise control to ensure the final flattened shape meets the design requirements.

[0050] Dynamic radius adjustment and arc length correction:

[0051] 1. Determine the dynamic radius:

[0052] For each differential mapping point, the system determines its corresponding dynamic radius based on the preset or calculated center position and radius parameters. The dynamic radius refers to the actual distance of the differential point relative to the target circle center.

[0053] 2. Adjust the length of each arc:

[0054] Based on the dynamic radius, the system adjusts the length of each arc segment. When the dynamic radius decreases, the arc length is shortened accordingly; conversely, when the dynamic radius increases, the arc length is lengthened. This adjustment strategy ensures a more compact and smoother shape after deformation.

[0055] 3. Angle adjustment:

[0056] While adjusting the length of each arc segment, the system also pays close attention to the angle change at the end of each segment. Through fine-grained angle adjustments, it ensures that each segment can be perfectly connected to form a coherent and desired flattened shape.

[0057] The specific steps for angle adjustment include:

[0058] Computes the angular difference between adjacent differential map points.

[0059] Adjust the end angle of each micro-segment based on the angle difference so that it smoothly transitions to the start angle of the next micro-segment.

[0060] Use an interpolation algorithm (such as linear interpolation or spline interpolation) to smooth the transitions between segments and avoid abrupt corners.

[0061] 4. Smooth transition processing:

[0062] To ensure the visual and functional consistency of the flattened shape, the system performs further smooth transition processing. This includes:

[0063] Check the continuity and smoothness between each segment, ensuring there are no obvious discontinuities or sharp edges.

[0064] Using high-order curve fitting techniques (such as Bézier curves or NURBS curves), each segment is optimized to make it more natural and smooth.

[0065] 5. Shape generation after flattening:

[0066] After these adjustments and optimizations, the system generates flattened straight lines or new curved shapes. These flattened shapes can be directly used in subsequent design processes or further converted into standardized font libraries for easy access, editing, and typesetting.

[0067] 6.Consistency Verification:

[0068] The system verifies the visual and functional consistency of the flattened shape to ensure that it is consistent with the original arc in terms of visual effects and functional characteristics. The verification process includes:

[0069] Compare geometric features before and after flattening to ensure critical dimensions and shapes remain unchanged.

[0070] Conduct actual application tests to evaluate whether the flattened shape meets the design requirements.

[0071] Step 4: Adjust the angles simultaneously with the arc length to ensure the desired angle change at the end of each segment. This process is accomplished through complex mathematical calculations and high-precision control, ensuring the final shape is consistent in both visual effect and functional properties.

[0072] Specific implementation steps for angle adjustment:

[0073] 1. Determine the differential mapping point and its dynamic radius:

[0074] First, based on the differential mapping point data generated in the previous step, the system calculates the corresponding dynamic radius for each differential point. The dynamic radius determines the actual distance of the differential point relative to the target circle center.

[0075] The data structure of each differential point includes the position coordinates (x, y), the dynamic radius value, the original arc length, and the angle change between adjacent mapping points.

[0076] 2. Calculate the angle difference between adjacent differential points:

[0077] For each pair of adjacent differential points, the system calculates the angular difference between them.

[0078] 3. Adjust the end angle of each segment:

[0079] While adjusting the length of each arc, the system adjusts the end angle of each micro-segment according to the calculated angle difference, so that it smoothly transitions to the starting angle of the next micro-segment.

[0080] 4. Use interpolation algorithm for smooth transition:

[0081] In order to further ensure smooth transitions between segments, the system uses interpolation algorithms to optimize the angles. Common interpolation algorithms include linear interpolation and spline interpolation:

[0082] Linear interpolation: For simple curves, you can use linear interpolation to smooth out the angle changes between adjacent points.

[0083] Spline interpolation: For more complex curves, using higher-order spline interpolation (such as cubic spline interpolation) can better fit the curve and ensure continuity and smoothness between segments.

[0084] 5. Verification and optimization:

[0085] The system verifies the angular changes between each segment to ensure there are no noticeable discontinuities or abrupt corners, and automatically makes optimization adjustments if any deviations from expectations are found.

[0086] For example, if the angle between two segments changes significantly, the system may recalculate the position and angle of the intermediate points to ensure a more natural and smooth transition.

[0087] In a real-world design case, a designer needed to flatten the curved shape of a complex tire sidewall into a straight line. Using the method presented in this invention, the designer first differentiated the arc into multiple segments, then adjusted the length of each segment based on a dynamic radius, and ensured a smooth transition between segments by adjusting the angles. The resulting linear pattern not only accurately reproduced the geometric features of the original design, but also maintained continuity and smoothness between segments, meeting the design requirements.

[0088] By adjusting the length of each arc segment based on a dynamic radius and ensuring smooth transitions between segments through angle adjustment, this method enables efficient and accurate parametric design of complex inverse arc shapes. This approach not only improves design efficiency and reduces manual operation time and errors, but also significantly enhances the overall quality and consistency of the design.

[0089] Step 5: Convert the processed curved shape into a standardized font library. After completing the differentiation, dynamic radius adjustment, and angle optimization of the tire sidewall curved shape, the next step is to convert the processed shape into a standardized font library. This process not only ensures high accuracy and consistency of design elements, but also greatly enriches the diversity of design elements and improves the flexibility and efficiency of subsequent design work.

[0090] Specific implementation steps for generating a standardized font library:

[0091] Determine the standard format:

[0092] First, the system needs to determine a standard format for storing processed shapes. Common standard formats include TrueTypeFont (TTF) and OpenTypeFont (OTF). These formats not only support high-precision representation of shapes but also allow for easy access, editing, and typesetting.

[0093] In the present invention, selecting a suitable font format is crucial because it directly affects the operability and compatibility in the subsequent design process.

[0094] Extract the processed geometric data:

[0095] The system extracts key geometric data from the flattened arc shape, including the position coordinates (x, y) of each differential mapping point, the dynamic radius value, and the angle change between adjacent mapping points.

[0096] This geometric data forms the basic elements of a standardized font library, ensuring that every shape can be accurately represented and stored.

[0097] Generate font outlines:

[0098] Based on the extracted geometric data, the system uses vector graphics technology to generate font outlines. Font outlines are usually composed of a series of Bézier curves or straight line segments to ensure the accuracy and smoothness of the shape.

[0099] For complex arc shapes, the system can use high-order curve fitting technology (such as cubic spline interpolation) to ensure the smoothness and natural transition of the font outline.

[0100] Define a character map:

[0101] While generating the font outline, the system defines a character mapping for each processed shape. The character mapping associates each shape with a specific character code (such as Unicode encoding), allowing designers to call the corresponding shape by entering the corresponding character code.

[0102] For example, if a designer wants to call up a specific tire sidewall pattern, they only need to enter its corresponding character code.

[0103] Set font properties:

[0104] To ensure the readability and aesthetics of the font library, the system also needs to set a series of font properties, including but not limited to: font name, font style (such as regular, bold, italic), font size, font color, word spacing and line spacing, and generate and store font files:

[0105] Finally, the system packages the generated font outlines and character mapping information into a standardized font file (such as TTF or OTF format) and stores it in a structured database for subsequent calling and editing.

[0106] Font files can not only be imported into various CAD software (such as ZWCAD, AutoCAD, SolidWorks, etc.), but can also be directly applied to other design tools and platforms, greatly expanding the application scope of design elements.

[0107] Considering a processed tire sidewall arc shape, the system first extracts its geometric data, including position coordinates (x, y), dynamic radius values, and the angular variation between adjacent mapping points. The system then uses vector graphics technology to generate font outlines and define character mapping. The specific steps are as follows:

[0108] Extract geometric data: The system extracts key geometric data from the flattened arc shape.

[0109] Generate font outlines: Based on the extracted data, the system generates font outlines to ensure the accuracy and smoothness of the shape.

[0110] Define character mapping: assign a unique character code (such as Unicode encoding) to each processed shape.

[0111] Set font properties: Define font name, style, size and other properties to ensure the readability and aesthetics of the font.

[0112] Store font files: Package the generated font outlines and character mapping information into TTF or OTF format and store them in the database.

[0113] On the other hand, this embodiment proposes a parametric design system for inverse arc sidewall shaping. The system includes multiple functional modules, each responsible for a specific task, and working together to achieve efficient and accurate tire sidewall shaping flattening and font library generation. The following is a specific implementation and detailed description of each module, including:

[0114] Differentiation module, used to differentiate the arc shape into multiple small segments; specific implementation steps:

[0115] Input: original arc shape provided by the user or standard pattern extracted from the database.

[0116] Output: multiple small segments after differentiation and their corresponding mapping point data.

[0117] Technical details:

[0118] Select the arc shape to be processed: The user or system selects the tire sidewall arc shape to be processed from the design data.

[0119] Determine initial parameters: The user specifies or the system automatically generates some initial parameters, including the target circle center position, flattening radius, etc.

[0120] Differentiation Mapping Point Generation: The selected arc shape is differentiated into multiple small segments using a high-precision algorithm, with each segment corresponding to a differential mapping point. The data structure of each mapping point typically includes the position coordinates (x, y), the dynamic radius value, the corresponding original arc length, and the angle change between adjacent mapping points.

[0121] Data storage and management: The data of all differential mapping points are stored in a structured database for use in subsequent steps.

[0122] The dynamic radius determination module determines the dynamic radius corresponding to each differential point based on the center position and radius parameters; specific implementation steps:

[0123] Input: Differentiation map point data generated by the differentiation module.

[0124] Output: dynamic radius value corresponding to each differential point.

[0125] The arc length and angle adjustment module adjusts the length of each arc segment based on the dynamic radius and performs angle adjustment. Specific implementation steps:

[0126] Input: Differential mapping points and their dynamic radius values generated by the dynamic radius determination module.

[0127] Output: adjusted arc length and angle data.

[0128] The font library generation module converts the processed shapes into a standardized font library. Specific implementation steps:

[0129] Input: Geometric data after arc length and angle adjustment.

[0130] Output: standardized font file (such as TTF or OTF format).

[0131] In addition, the present invention also provides a terminal device. The sidewall shaping reverse arc parametric design method involved in this embodiment is mainly used in the terminal device, which can be a PC, portable computer, mobile terminal and other devices with display and processing functions.

[0132] Specifically, such as Figure 3 As shown, the terminal device may include a processor (e.g., a CPU), a communication bus, a user interface, a network interface, and a memory. The communication bus is used to implement communication between these components; the user interface may include a display and an input unit such as a keyboard; the network interface may optionally include a standard wired interface or a wireless interface (e.g., a Wi-Fi interface); and the memory may be a high-speed RAM memory or a non-volatile memory such as a disk memory. The memory may also be a storage device independent of the aforementioned processor.

[0133] Among them, the memory stores a readable storage medium, and the readable storage medium stores a sidewall shape inverse arc parametric design program. The processor can call the sidewall shape inverse arc parametric design program stored in the memory and execute the sidewall shape inverse arc parametric design method provided by an embodiment of the present invention.

[0134] It will be understood that a computer-readable storage medium can be a tangible device that can hold and store instructions used by an instruction execution device. Computer-readable storage media can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination thereof. As used herein, a computer-readable storage medium is not to be construed as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through an electrical wire.

[0135] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions to be stored in the computer-readable storage medium in each computing / processing device.

[0136] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk, C++, and conventional procedural programming languages such as "C" language or similar programming languages. Computer-readable program instructions may be executed entirely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., utilizing an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be personalized by utilizing the state information of the computer-readable program instructions. The electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0137] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A parametric design method for inverse arc sidewall shaping, characterized in that: The following steps are involved: Divide the arc shape of the tire sidewall into multiple small segments; Determine the dynamic radius corresponding to each differential point based on the circle center position and radius parameters specified by the user or calculated; The length of each arc segment is adjusted based on the dynamic radius, and a smooth transition between segments is ensured by adjusting the angle, ultimately forming a flattened straight line or a new arc shape.

2. The method for parametric design of inverse arc sidewall shape according to claim 1, characterized in that: The differentiation process is performed in the form of differential mapping points.

3. The method for parametric design of inverse arc sidewall shape according to claim 1, characterized in that: Determining the dynamic radius corresponding to each differential point includes: When determining the dynamic radius, a coefficient formula related to the target arc or straight line is used: Lflat = Loriginal x k, where k is the dynamic ratio.

4. The method for parametric design of inverse arc sidewall shape according to claim 1, characterized in that: Also includes: The angle is adjusted while adjusting the arc length to ensure that the angle change at the end of each segment is as expected.

5. The method for parametric design of inverse arc sidewall shape according to claim 1, characterized in that: Also includes: Convert the processed arc shape into a standardized font library.

6. A system for implementing the inverse arc parametric design method for sidewall molding according to any one of claims 1 to 5, characterized in that: include: Differentiation module, used to differentiate the arc shape into multiple small segments; Dynamic radius determination module, which determines the dynamic radius corresponding to each differential point according to the center position and radius parameters; Arc length and angle adjustment module, which adjusts the length of each arc segment based on the dynamic radius and performs angle adjustment; The font library generation module converts the processed shapes into a standardized font library.

7. A terminal device, characterized in that: The terminal device includes a processor, a memory, and a sidewall shape reverse arc parametric design program stored in the memory and executable by the processor, wherein when the sidewall shape reverse arc parametric design program is executed by the processor, the steps of the sidewall shape reverse arc parametric design method as described in any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a sidewall shape inverse arc parametric design program, wherein when the sidewall shape inverse arc parametric design program is executed by the processor, the steps of the sidewall shape inverse arc parametric design method as described in any one of claims 1 to 5 are implemented.

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