Hole flanging forming method for increasing hole flanging height and reducing cracking risk and related equipment

Abstract

The invention discloses a hole flanging forming method for increasing the hole flanging height and reducing the cracking risk and related equipment, and relates to the technical field of metal plastic machining. The radius of the flanged circular hole is adjusted, so that main strain in all directions in the flanged hole is uniform, and the circumferential tensile deformation of the edge part is maximized; changing the turned round hole into a special-shaped hole based on the adjusted radius; and the special-shaped hole is a flanged hole of which the radius changes along with the in-plane performance of the material. According to the method, the circumferential tensile deformation capacity of the edge can be effectively improved, the hole flanging height is further increased, meanwhile, cylindricity reduction caused by other methods is further avoided, and the method is simple and effective and has important engineering application value.

Description

Technical Field

[0001] This application relates to the technical field of metal plastic processing, and particularly relates to a flanging forming method and related equipment for increasing the flanging height and reducing the cracking risk. Background Art

[0002] In an automotive chassis, in order to install various chassis components, such as a suspension system, an exhaust system, etc., it is often necessary to form some flanging features. However, due to the particularity of the rolling process, the sheet metal generally exhibits anisotropy. When expanding the hole, due to the performance differences in each direction, the deformation degrees are different, and the thinning is more at the positions with larger local deformation, which often leads to cracking at the final edge.

[0003] Due to anisotropy, local deformation is larger in some directions, resulting in excessive thinning and thus premature cracking. Increasing the flanging height can increase the assembly fastening force and improve the overall vehicle performance. In recent years, with the improvement of material strength, the plasticity of the material has decreased, and the flanging height is limited.

[0004] Therefore, it is necessary to propose a flanging forming method for increasing the flanging height and reducing the cracking risk to solve the above problems. Summary of the Invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] This application specifically includes the following aspects:

[0007] In a first aspect, this application proposes a flanging forming method for increasing the flanging height and reducing the cracking risk, including:

[0008] Obtain the radius of the flanged circular hole of the part to be processed;

[0009] Adjust the radius of the flanged circular hole to uniform the principal strains in each direction within the flanging, so as to maximize the circumferential tensile deformation at the edge;

[0010] Change the flanged circular hole into a special-shaped hole based on the adjusted radius; the special-shaped hole is a flanging with a radius varying with the in-plane properties of the material.

[0011] In a feasible implementation manner, adjusting the radius of the flanged circular hole includes:

[0012] Increase the radius at the place with larger thinning of the flanged circular hole;

[0013] Decrease the radius at the place with smaller thinning of the flanged circular hole.

[0014] In a feasible implementation, the radius of the oval-shaped hole is adjusted to uniform the principal strains in all directions within the flanging hole, maximizing the circumferential tensile deformation at the edge, including:

[0015] Reduce the principal strain at the location with larger thinning by increasing the radius, and increase the principal strain at the location with smaller thinning by decreasing the radius, so as to uniform the principal strains in all directions within the flanging hole and maximize the circumferential tensile deformation at the edge.

[0016] In a feasible implementation, the shaped hole is a flanging hole with a radius varying according to the in-plane properties of the material. Wherein, the calculation method of the local radius of the shaped hole is:

[0017]

[0018] Wherein, R 等效 is the equivalent radius of the material; a is the weighting coefficient, 0 ≤ a ≤ 1; b is the anisotropy correlation coefficient; θ is the rolling direction angle; M is the angle-related modulation term, and the value of M changes with the change of θ.

[0019] In a feasible implementation, the equivalent radius of the material is the radius of the oval-shaped flanging hole.

[0020] In a feasible implementation, the yield strength of the sheet corresponding to the part to be processed is greater than 300 MPa and the thickness is less than 3 mm.

[0021] In a feasible implementation, the sheet corresponding to the part to be processed is an in-plane anisotropic sheet.

[0022] In a second aspect, the present application provides a flanging forming system for increasing the flanging height and reducing the cracking risk, which is applied to the flanging forming method for increasing the flanging height and reducing the cracking risk according to any one of the above embodiments, including:

[0023] A data acquisition module for obtaining the radius of the oval-shaped flanging hole of the part to be processed;

[0024] A radius adjustment module for adjusting the radius of the oval-shaped flanging hole to uniform the principal strains in all directions within the flanging hole, maximizing the circumferential tensile deformation at the edge;

[0025] A flanging forming module for changing the oval-shaped flanging hole into a shaped hole based on the adjusted radius; the shaped hole is a flanging hole with a radius varying according to the in-plane properties of the material.

[0026] In a third aspect, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program stored in the memory, it implements the steps of the hole flanging forming method for increasing the hole flanging height and reducing the cracking risk according to any one of the first aspects described above.

[0027] In a fourth aspect, the present application also proposes a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the hole flanging forming method for increasing the hole flanging height and reducing the cracking risk according to any one of the first aspects.

[0028] In summary, for the hole flanging forming method for increasing the hole flanging height and reducing the cracking risk proposed in the present application, by utilizing the anisotropic characteristics of the material and cooperating with precise control of the punching shape, it is possible to make the edge deformation of the sheet metal more uniform after hole flanging, thereby avoiding premature local thinning and causing premature cracking. At the same time, this method does not produce the bending feature at the hole flanging edge, ensuring cylindricity. This method can effectively increase the hole flanging height, thereby improving the assembly fastening force, and has very good practical application significance.

[0029] For the hole flanging forming method for increasing the hole flanging height and reducing the cracking risk proposed in the present application, other advantages, objectives, and features of the present application will be partially reflected by the following description, and will also be understood by those skilled in the art through the research and practice of the present application. Description of the Drawings

[0030] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of this specification. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0031] Figure 1 It is a schematic flowchart of a hole flanging forming method for increasing the hole flanging height and reducing the cracking risk provided by an embodiment of the present application;

[0032] Figure 2 It is a schematic diagram of the radius adjustment for flanging a circular hole provided by an embodiment of the present application;

[0033] Figure 3 It is a schematic diagram of the edge thinning condition after hole flanging provided by an embodiment of the present application;

[0034] Figure 4 It is a schematic diagram of the principal strain condition at the edge after hole flanging provided by an embodiment of the present application;

[0035] Figure 5Schematic diagram of the maximum flanging height result simulation before optimization for the flanging height of 2.0 mm thick CP780 provided by the embodiment of the present application;

[0036] Figure 6 Schematic diagram of the maximum principal strain result simulation at the edge before optimization for the flanging height of 2.0 mm thick CP780 provided by the embodiment of the present application;

[0037] Figure 7 Schematic diagram of the comparison before and after the edge line optimization provided by the embodiment of the present application;

[0038] Figure 8 Schematic diagram of the maximum flanging height result simulation after optimization for the flanging height of 2.0 mm thick CP780 provided by the embodiment of the present application;

[0039] Figure 9 Schematic diagram of the maximum principal strain result simulation at the edge after optimization for the flanging height of 2.0 mm thick CP780 provided by the embodiment of the present application;

[0040] Figure 10 Schematic diagram of the comparison before and after the optimization of the principal strain distribution at the edge provided by the embodiment of the present application;

[0041] Figure 11 Schematic diagram of the functional modules of a flanging forming system for increasing the flanging height and reducing the cracking risk provided by the embodiment of the present application;

[0042] Figure 12 Schematic diagram of the structure of an electronic device for a flanging forming that increases the flanging height and reduces the cracking risk provided by the embodiment of the present application. Detailed implementation manners

[0043] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of this specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. Without conflict, the technical features in the embodiments of this specification and the embodiments can be combined with each other.

[0044] In this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. The term "more than two" includes two or more than two cases.

[0045] This application provides a flanging forming method for increasing the flanging height and reducing the cracking risk. It is known that Figure 3 after flanging, the thinning of the material in each direction is significantly different, and the thinning degree in the cracking area is significantly higher than that in the non-cracking area. At the same time, according to Figure 4 it is known that after the deformation increases, the difference in the principal strains in each direction becomes larger and larger. Before cracking, the direction with a larger principal strain is about 2 times the amplitude of the area with a smaller principal strain. Due to anisotropy, the local deformation in some directions is larger, resulting in excessive thinning and premature cracking. Increasing the flanging height can increase the assembly fastening force and improve the vehicle performance. In recent years, with the improvement of material strength, the plasticity of the material has decreased, and the flanging height is limited. To increase the flanging height and ensure the roundness of the flanging, this application proposes a flanging forming method for increasing the flanging height and reducing the cracking risk.

[0046] Please refer to Figure 1 which is a schematic flow diagram of a flanging forming method for increasing the flanging height and reducing the cracking risk provided by an embodiment of this application. Specifically, it may include:

[0047] S110. Obtain the radius of the flanged circular hole of the part to be processed.

[0048] Exemplarily, this application changes the traditional flanged circular hole into a special-shaped hole whose radius changes with the in-plane properties of the material. This means that the radius of the flanging is no longer a fixed circular radius but changes according to the in-plane properties of the material.

[0049] S120. Adjust the radius of the flanged circular hole to uniform the principal strains in each direction of the flanging and maximize the circumferential tensile deformation at the edge.

[0050] Exemplarily, by slightly changing the local radius of the round flanging hole, the radius of the region with relatively large traditional deformation is gradually reduced, and the radius of the region with relatively small deformation is gradually increased. Such radius adjustment will reduce the principal strain in the region with relatively large traditional deformation and increase the principal strain in the region with relatively small deformation. Eventually, the principal strains in all directions are more uniform compared to the traditional round flanging hole. Due to the more uniform adjustment of the principal strain, the circumferential tensile deformation at the edge is maximized. By maximizing the circumferential tensile deformation at the edge, the effective increase in the flanging height is achieved, and at the same time, the cracking risk is reduced because the more uniform principal strain can reduce local stress concentration and lower the possibility of cracking.

[0051] S130. Change the round flanging hole into a special-shaped hole based on the adjusted radius; the special-shaped hole is a flanging hole with a radius varying with the in-plane properties of the material.

[0052] Exemplarily, by adjusting the radius, the traditional round flanging hole is changed into a special-shaped hole, and the radius of the special-shaped hole varies with the in-plane properties of the material.

[0053] In some examples, adjusting the radius of the round flanging hole includes:

[0054] Increase the radius at the place with relatively large thinning of the round flanging hole;

[0055] Decrease the radius at the place with relatively small thinning of the round flanging hole.

[0056] Exemplarily, as Figure 2 shown, increasing the radius at the place with relatively large thinning of the round flanging hole can reduce the degree of deformation in this region, thereby reducing the principal strain, alleviating the situation of excessive thinning, and contributing to improving the stability and reliability of the structure. Decreasing the radius at the place with relatively small thinning can relatively increase the degree of deformation in this region, making the deformation of the overall structure more uniform and avoiding the problem of too large local deformation difference.

[0057] In some examples, adjusting the radius of the round flanging hole to make the principal strains in all directions within the flanging hole uniform and maximize the circumferential tensile deformation at the edge includes:

[0058] Reduce the principal strain at the place with relatively large thinning by increasing the radius, and increase the principal strain at the place with relatively small thinning by decreasing the radius, so as to make the principal strains in all directions within the flanging hole uniform and maximize the circumferential tensile deformation at the edge.

[0059] Exemplarily, for the place with relatively large thinning, increasing the radius can reduce the degree of deformation at this place, thereby reducing the principal strain and reducing the tendency of further thinning, which helps to improve the situation of local excessive deformation. For the place with relatively small thinning, decreasing the radius will relatively increase the degree of deformation, thereby increasing the principal strain, which can make the deformation at this place more sufficient to a certain extent and make the overall deformation more uniform.

[0060] In some examples, the shaped hole is a flanging hole whose radius varies with the in-plane properties of the material. Among them, the calculation method of the local radius of the shaped hole is as follows:

[0061]

[0062] where R 等效 is the equivalent radius of the material; a is the weighting coefficient, 0 ≤ a ≤ 1; b is the anisotropy correlation coefficient; θ is the rolling direction angle; M is the angle-related modulation term, and the value of M changes with the change of θ.

[0063] Exemplarily, the radius sizes of each local position of the shaped hole are not fixed, but dynamically change under the comprehensive influence of multiple factors.

[0064] In some examples, the equivalent radius of the material is the radius of the flanged circular hole.

[0065] Exemplarily, the equivalent radius of the material R 等效 is a parameter reflecting the overall dimensional characteristics of the material. Different materials may have different equivalent radii, which will affect the local radius size of the shaped hole. For example, a larger equivalent radius of the material may cause a corresponding change in the local radius of the shaped hole.

[0066] The weighting coefficient a is usually used to adjust the influence degree of each factor on the result. The weighting coefficient a here can be used to control the contribution of other factors to the local radius of the shaped hole. By adjusting the value of a, the influence weights of factors such as the equivalent radius of the material, the anisotropy correlation coefficient, and the angle with the rolling direction on the local radius of the shaped hole can be changed.

[0067] Materials often have anisotropy, that is, the properties in different directions are different. The anisotropy correlation coefficient b reflects the degree of performance difference of the material in different directions, and it will affect the change of the local radius of the shaped hole. For example, for materials with obvious anisotropy, the value of b may be larger, so that the change of the local radius of the shaped hole in different directions is more significant.

[0068] During the processing of some materials, the rolling direction will affect the properties and deformation of the material. The rolling direction angle θ here represents the included angle between the local position of the shaped hole and the rolling direction of the material. Different angles will cause the local radius of the shaped hole to change because the deformation and stress distribution of the material may be different at different angles.

[0069] Therefore, the local radius of the shaped hole is a dynamically changing value, and it will determine the specific radius size through the comprehensive action of factors such as the material characteristics (equivalent radius, anisotropy) and the angle with the rolling direction.

[0070] In some examples, the yield strength of the sheet material corresponding to the part to be processed is greater than 300 MPa and the thickness is less than 3 mm.

[0071] Exemplarily, in terms of high strength (yield strength greater than 300 MPa), it has the advantages of high structural stability, lightweight potential, and material savings.

[0072] Specifically, it can withstand large external forces without plastic deformation, ensuring the dimensional stability and shape accuracy of the part to be processed during use, and ensuring that the part can maintain good performance under various working conditions. For some parts that need to withstand dynamic loads or impacts, high strength can improve their fatigue and impact resistance, extending their service life.

[0073] On the premise of meeting the strength requirements, lightweighting of the part can be achieved by optimizing the design and using thinner sheets. This is of great significance for some application fields with strict weight requirements, such as aerospace and automotive, which can reduce energy consumption, improve fuel efficiency, or increase carrying capacity.

[0074] Due to high strength, less material can be used to achieve the same load-bearing capacity, thus reducing material costs.

[0075] While in terms of thin thickness (thickness less than 3 mm), it has the advantages of good space adaptability, good processability, and relatively good heat dissipation performance.

[0076] Specifically, for some application scenarios with limited space, thin sheets can be more easily installed and laid out, improving the flexibility of the design. Especially in some miniaturized and integrated devices, thin sheets can leave more space for other components.

[0077] Thinner sheets are usually easier to perform processing operations such as cutting, stamping, and bending, reducing the processing difficulty and cost. More complex shapes and structures can be achieved to meet different design requirements.

[0078] For some parts that generate heat, the surface area of the thin sheet is relatively large, which is beneficial for heat dissipation, improving the working reliability and stability of the part.

[0079] In some examples, the sheet material corresponding to the part to be processed is a planar anisotropic sheet.

[0080] Exemplarily, the sheet material is a planar anisotropic sheet, and such a sheet has different performance characteristics in different directions within its plane. For example, within one plane, measuring its mechanical properties (such as yield strength, tensile strength, elastic modulus, etc.) and physical properties (such as electrical conductivity, thermal conductivity, etc.) along different directions may be different. This is different from isotropic sheets, which have basically the same properties in all directions within the plane.

[0081] In summary, a flanging forming method for increasing the flanging height and reducing the cracking risk provided by the present application changes the traditional circular hole flanging into a special-shaped hole with a radius varying with the in-plane properties of the material. By slightly changing the local radius of the flanging, the radius of the traditional large-deformation area gradually decreases, and the radius of the small-deformation area gradually increases, so that the principal strain in the traditional large-deformation area decreases, and the principal strain in the small-deformation area increases. Eventually, the principal strains in all directions are more uniform than those in the traditional circular hole flanging, thereby maximizing the circumferential tensile deformation at the edge, and further effectively increasing the flanging height.

[0082] In a specific embodiment, the flanging height of 2.0 mm thick CP780 is optimized. The original design punching radius is 20 mm, and based on simulation calculation, its maximum flanging height is 16.49 mm, as Figure 5 shown. The maximum principal strain at the edge is 0.4859, as Figure 6 shown.

[0083] Optimizing the flanging can reduce the ultimate strain after flanging and increase the maximum flanging height at the same time. Specifically, according to the above formula (1), select a = 1.1, b = 2, R 等效 = 20 in formula (1). Since it is an optimization for one circle, θ ranges from 0 to 360 degrees. The punching edges before and after optimization are as Figure 7 shown.

[0084] Using the optimized punching for flanging, its maximum height reaches 17.82 mm, as Figure 8 shown, which is 1.33 mm higher than 16.49 mm before optimization. And as Figure 9 shown, the maximum principal strain at its edge is reduced from 0.4859 to 0.4792, that is, the cracking risk at the edge after forming is further reduced.

[0085] At the same time, comparing the principal strain distribution at the edge after flanging of the two flanging methods, it can be seen that the principal strain fluctuation at the edge after optimization is smaller, while the principal strain fluctuation at the edge after flanging before optimization is larger, which will cause excessive local deformation and then lead to cracking, as Figure 10 shown, where the abscissa is the true distance of the path and the ordinate is the principal strain at the edge.

[0086] It should be noted that the above embodiments are only the best examples and are not intended to limit the implementation manners of the present application.

[0087] Further, the present application also proposes a hole flanging forming system for increasing the hole flanging height and reducing the cracking risk, which is applied to the embodiments of any of the above hole flanging forming methods for increasing the hole flanging height and reducing the cracking risk. Specifically, as Figure 11 shown, it is a schematic diagram of the functional modules of a hole flanging forming system for increasing the hole flanging height and reducing the cracking risk proposed by the present application, including:

[0088] A data acquisition module 21, configured to obtain the radius of the round hole to be flanged of the part to be processed;

[0089] A radius adjustment module 22, configured to adjust the radius of the round hole to be flanged to uniform the principal strains in all directions within the hole flanging, so as to maximize the circumferential tensile deformation at the edge;

[0090] A hole flanging forming module 23, configured to change the round hole to be flanged into a special-shaped hole based on the adjusted radius; the special-shaped hole is a hole flanging with a radius varying with the in-plane properties of the material.

[0091] In summary, the traditional hole flanging process for parts uses the process of punching a round hole and then flanging. However, due to the existence of anisotropy of the sheet metal, the deformation in different directions after hole flanging is uneven. Eventually, due to excessive deformation in some directions, the sheet metal in this direction is excessively thinned, resulting in cracking. The present application proposes that the punching radius changes based on the material properties. By optimizing the punching shape, the radius in the region with larger deformation gradually decreases, and the radius in the region with smaller deformation gradually increases. As a result, the strain in the traditional region with larger deformation is reduced, and the strain in the region with smaller deformation is increased. Eventually, the deformation in all directions is more uniform than that of the traditional round hole flanging, and thus the circumferential tensile deformation at the edge is maximized. Thereby, the circumferential tensile deformation ability at the edge can be effectively improved, and the hole flanging height can be further increased.

[0092] As Figure 12 shown, an embodiment of the present application also provides an electronic device 300, including a processor 310, a memory 320, and a computer program 321 stored on the memory 320 and executable on the processor. When the processor 310 executes the computer program 321, the steps of any of the above hole flanging forming methods for increasing the hole flanging height and reducing the cracking risk are implemented.

[0093] Since the electronic device introduced in this embodiment is the device used to implement a hole flanging forming method for increasing the hole flanging height and reducing the cracking risk in the embodiment of the present application, based on the method introduced in the embodiment of the present application, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment. Therefore, the specific implementation of how this electronic device implements the method in the embodiment of the present application will not be described in detail here. As long as the device used by those skilled in the art to implement the method in the embodiment of the present application belongs to the scope of protection of the present application.

[0094] In a specific implementation process, when the computer program 321 is executed by a processor, it can implement Figure 1 any implementation manner in the corresponding embodiment.

[0095] It should be noted that in the above embodiments, the descriptions of each embodiment have their own emphases. For parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-readable program codes.

[0097] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the processes and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0098] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0099] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Therefore, the instructions executed on the computer or other programmable device provide steps for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0100] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions run on a processing device, the processing device is caused to execute the process of the hole flanging forming method that increases the hole flanging height and reduces the cracking risk.

[0101] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are fully or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, a computer, a server, or a data center to another website, a computer, a server, or a data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be stored by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0102] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0103] In several embodiments provided by the present application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling, direct coupling, or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in an electrical, mechanical, or other form.

[0104] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0105] In addition, in each embodiment of the present application, each functional unit may be integrated into one processing unit, may exist physically alone for each unit, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0106] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0107] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

[0108] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0109] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these modifications and variations.

Claims

1. A punching forming method for increasing punching height and reducing cracking risk, characterized in that: include: Obtain the radius of the circular hole of the part to be processed; The radius of the circular hole is adjusted to uniformly distribute the principal strain in all directions in the hole and maximize the circumferential tensile deformation of the edge; The circular hole is changed into a special-shaped hole based on the adjusted radius; the special-shaped hole is a hole whose radius changes with the in-plane properties of the material.

2. The punching forming method for increasing punching height and reducing cracking risk according to claim 1, characterized in that: The radius of the circular hole is adjusted, including: Increasing the radius of the larger thinning portion of the circular hole; The radius of the rounded hole at the smaller thinning point is reduced.

3. The punching forming method for increasing punching height and reducing cracking risk according to claim 2, characterized in that: The radius of the circular hole is adjusted to uniformly distribute the principal strain in all directions in the hole and maximize the circumferential tensile deformation of the edge, including: The principal strain at the larger thinning point is reduced by increasing the radius, and the principal strain at the smaller thinning point is increased by decreasing the radius, so as to evenly increase the principal strain in all directions in the hole and maximize the circumferential tensile deformation of the edge.

4. The punching forming method for increasing punching height and reducing cracking risk according to claim 1, characterized in that: The irregular hole is a turned hole whose radius varies with the in-plane properties of the material, wherein the local radius of the irregular hole is calculated as follows: Among them, R 等效 is the material equivalent radius; a is the weighting coefficient, 0≤a≤1; b is the anisotropy correlation coefficient; θ is the rolling direction angle; M is the angle-related modulation term, and the value of M changes with the change of θ.

5. The punching forming method for increasing punching height and reducing cracking risk according to claim 4, characterized in that: The material equivalent radius is the radius of the rounded hole.

6. The punching forming method for increasing punching height and reducing cracking risk according to claim 1, characterized in that: The yield strength of the sheet material corresponding to the component to be processed is greater than 300 MPa and the thickness is less than 3 mm.

7. The punching forming method for increasing punching height and reducing cracking risk according to claim 6, characterized in that: The sheet material corresponding to the component to be processed is an in-plane anisotropic sheet material.

8. A punching forming system for increasing punching height and reducing cracking risk, applied to the punching forming method for increasing punching height and reducing cracking risk as claimed in any one of claims 1 to 7, characterized in that: include: A data acquisition module is used to obtain the radius of the circular hole of the part to be processed; A radius adjustment module is used to adjust the radius of the circular hole to evenly adjust the principal strain in all directions of the hole and maximize the circumferential tensile deformation of the edge; The hole forming module is used to change the circular hole into a special-shaped hole based on the adjusted radius; the special-shaped hole is a hole whose radius changes with the in-plane properties of the material.

9. An electronic device, comprising: A memory and a processor, wherein the processor is used to implement the steps of the punching forming method for increasing the punching height and reducing the risk of cracking as described in any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the punching forming method for increasing the punching height and reducing the risk of cracking as described in any one of claims 1 to 7 are implemented.

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