Titanium polar plate mold generation method and device, electronic equipment and storage medium
By performing unidirectional and bidirectional tensile treatment on the titanium plate material, combined with forming stamping simulation test, the target mold model is generated, and the problem of large gap in thinning and cracking and forming cross-sections during the titanium plate forming process is solved, and the efficient forming of titanium plates and the rapid feasibility evaluation of mold design is achieved.
Patent Information
- Application Number
- CN202411533086.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-02-28
AI Technical Summary
During the complex forming process of titanium electrode plates, thinning and cracking are prone to problems such as large gap in forming sections and design, resulting in poor processing performance and limiting the development and application of titanium electrode plates.
By obtaining the preset friction coefficients of the initial titanium material and bipolar plate mold, performing unidirectional tensile and bidirectional tensile processing, determining the forming limit curve and mechanical performance parameters, determining the target yield criterion based on the stress and strain curve, generating the initial mold model and material model, performing forming and stamping simulation tests, and generating the target mold model.
It realizes efficient analysis of the two-step stamping forming behavior of titanium materials, quickly determines the feasibility of mold design from the perspective of material thinning, and improves the accuracy and efficiency of titanium plate forming.
Smart Images
Figure CN119541718A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of fuel cell metal bipolar plate forming, and in particular to a titanium plate mold generation method, device, electronic equipment and storage medium. Background Art
[0002] As one of the core components of the proton exchange membrane fuel cell stack, the bipolar plate plays an important role in distributing gas, conducting electricity, conducting heat, and draining water, and determines the volume and mass power density of the stack. Among them, titanium bipolar plates have the advantages of low density, good corrosion resistance, good conductivity, and good thermal conductivity compared to stainless steel. They can effectively improve the power density of the stack and help the rapid startup and high dynamic response of the vehicle-mounted stack. However, titanium has low elongation, large rebound, and poor processing performance. For the forming of complex plates, thinning and cracking are prone to occur, and the gap between the formed cross section and the design is large, which limits the development and application of titanium plates.
[0003] In the related technologies, for the stamping simulation of ultra-thin titanium plates, there are problems such as lack of performance data of pure titanium foil, unclear plastic deformation law, poor accuracy of numerical simulation constitutive model, and difficulty in determining forming process parameters. Therefore, how to analyze the two-step stamping forming behavior of titanium materials and quickly determine the feasibility of mold design from the perspective of material thinning has become a key research direction. Summary of the invention
[0004] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.
[0005] To this end, the purpose of the present disclosure is to provide a titanium pole plate mold generation method, device, electronic device and storage medium.
[0006] The titanium plate mold generation method proposed in the first embodiment of the present disclosure includes:
[0007] Obtaining an initial titanium material, a bipolar plate mold, and a preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has corresponding initial mold parameters;
[0008] The initial titanium material is subjected to uniaxial stretching and biaxial stretching treatment to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material;
[0009] According to the stress-strain curve, a target yield criterion matching the initial titanium material is determined;
[0010] Generate an initial mold model according to initial mold parameters, and generate an initial material model of initial titanium material according to mechanical property parameters and target yield criterion;
[0011] According to the preset boundary conditions and the preset friction coefficient, the initial material model and the initial die model are subjected to a forming and stamping simulation test to obtain simulation test results, wherein the simulation test results include: a forming limit diagram FLD damage value and a material thinning rate of the initial titanium material;
[0012] Generate the target mold model based on the simulation test results and the initial mold model.
[0013] The titanium plate mold generation device proposed in the second embodiment of the present disclosure includes:
[0014] An acquisition module, used to acquire an initial titanium material, a bipolar plate mold, and a preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has corresponding initial mold parameters;
[0015] The first determination module is used to perform uniaxial stretching and biaxial stretching treatment on the initial titanium material to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material;
[0016] The second determination module is used to determine the target yield criterion adapted to the initial titanium material according to the stress-strain curve;
[0017] A generation module, used to generate an initial mold model according to initial mold parameters, and to generate an initial material model of an initial titanium material according to mechanical property parameters and a target yield criterion;
[0018] A test module is used to perform a forming and stamping simulation test on an initial material model and an initial die model according to preset boundary conditions and a preset friction coefficient to obtain a simulation test result, wherein the simulation test result includes: a forming limit diagram FLD damage value and a material thinning rate of the initial titanium material;
[0019] The generation module is used to generate a target mold model according to the simulation test results and the initial mold model.
[0020] The electronic device proposed in the third aspect embodiment of the present disclosure includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the titanium pole plate mold generation method proposed in the first aspect embodiment of the present disclosure is implemented.
[0021] The fourth aspect embodiment of the present disclosure proposes a non-temporary computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the titanium pole plate mold generation method proposed in the first aspect embodiment of the present disclosure is implemented.
[0022] The fifth embodiment of the present disclosure proposes a computer program product. When the instructions in the computer program product are executed by a processor, the titanium pole plate mold generation method proposed in the first embodiment of the present disclosure is executed.
[0023] The titanium plate mold generation method, device, electronic device and storage medium provided by the present disclosure have at least the following beneficial effects: by obtaining the initial titanium material, the bipolar plate mold and the preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has the corresponding initial mold parameters, the initial titanium material is subjected to uniaxial stretching and biaxial stretching treatment to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material, and the target yield criterion adapted to the initial titanium material is determined according to the stress-strain curve, an initial mold model is generated according to the initial mold parameters, and an initial material model of the initial titanium material is generated according to the mechanical property parameters and the target yield criterion, and a forming stamping simulation test is performed on the initial material model and the initial mold model according to the preset boundary conditions and the preset friction coefficient to obtain a simulation test result, wherein the simulation test result includes: the forming limit diagram FLD damage value and the material thinning rate of the initial titanium material, and a target mold model is generated according to the simulation test results and the initial mold model, thereby being able to efficiently and conveniently realize the analysis of the two-step stamping forming behavior of the titanium material, and quickly determine the feasibility of the mold design from the perspective of material thinning.
[0024] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:
[0026] Figure 1 It is a flow chart of a titanium plate mold generation method proposed in an embodiment of the present disclosure;
[0027] Figure 2 is a schematic diagram of a forming limit curve proposed in an embodiment of the present disclosure;
[0028] Figure 3 is a comparative schematic diagram of a yield locus curve proposed in an embodiment of the present disclosure;
[0029] Figure 4 It is a structural schematic diagram of a titanium plate mold generating device proposed in an embodiment of the present disclosure;
[0030] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. DETAILED DESCRIPTION
[0031] Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.
[0032] Figure 1 It is a flow chart of a titanium pole plate mold generation method proposed in an embodiment of the present disclosure.
[0033] Among them, it should be noted that the executor of the titanium pole plate mold generation method of this embodiment is a titanium pole plate mold generation device, which can be implemented by software and / or hardware. The device can be configured in an electronic device, and the electronic device can include but is not limited to a terminal, a server, etc. For example, the terminal can be a mobile phone, a handheld computer, etc.
[0034] like Figure 1 As shown, the titanium plate mold generation method comprises:
[0035] S101: obtaining an initial titanium material, a bipolar plate mold, and a preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has corresponding initial mold parameters.
[0036] Among them, as one of the core components of the proton exchange membrane fuel cell stack, the bipolar plate has important functions such as gas distribution, electrical conduction, thermal conduction, and drainage, which determines the volume and mass power density of the stack. Among them, titanium bipolar plates have advantages over stainless steel in terms of low density, good corrosion resistance, good electrical conductivity, and good thermal conductivity, which can effectively improve the power density of the stack and contribute to the rapid startup and high dynamic response of the vehicle-mounted stack.
[0037] The initial titanium material refers to untreated 0.1 mm titanium material, and there is no restriction on this.
[0038] Among them, the bipolar plate mold is used to process the initial titanium material to obtain a titanium metal bipolar plate.
[0039] Among them, the preset friction coefficient between the bipolar plate mold and the initial titanium material and the bipolar plate mold can refer to the friction coefficient between the master / slave surfaces of the upper surface of the bipolar plate mold punch and the lower surface of the plate, and the lower surface of the concave mold and the upper surface of the plate. The friction coefficient can be 0.05-0.15, and there is no limit to this.
[0040] Among them, the bipolar plate mold has corresponding initial mold parameters, which can be, for example: the shape of the mold, the depth of the inner concave, the bottom radius of the first step forming male and female molds, the top radius of the second step forming male and female molds, the bottom radius of the second step forming male and female molds, etc., without limitation.
[0041] S102: Performing uniaxial stretching and biaxial stretching treatment on the initial titanium material to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material.
[0042] In the disclosed embodiment, after obtaining the initial titanium material, the initial titanium material may be subjected to uniaxial stretching and biaxial stretching treatment to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material.
[0043] Among them, the forming limit curve (FLC), also known as the forming limit diagram, is an important tool for evaluating the local forming ability of metal sheets and is often used to analyze and solve the cracking problem during forming.
[0044] Among them, the mechanical performance parameters include: elastic modulus, yield strength, tensile strength, yield strength ratio, elongation, hardening coefficient, hardening index and thickness anisotropy index, etc., and there is no restriction on this.
[0045] That is to say, in the embodiment of the present disclosure, the initial titanium material may be subjected to uniaxial stretching treatment to obtain mechanical performance parameters such as elastic modulus, yield strength, tensile strength, yield strength ratio, elongation, hardening coefficient, hardening index, and thickness anisotropy index of the initial titanium material.
[0046] In the disclosed embodiment, the initial titanium material may be subjected to a biaxial stretching process to obtain a stress-strain curve of the initial titanium material.
[0047] In the embodiment of the present disclosure, a rigid die bulging method can also be used to carry out a forming limit experiment, where the material is deformed until it breaks by moving the punch, and the three-dimensional strain of the material is calculated. After post-processing, a forming limit curve is obtained. The forming limit curve is as follows: Figure 2 As shown, see Figure 2 , Figure 2 Schematic diagram of a forming limit curve proposed in an embodiment of the present disclosure.
[0048] S103: Determine a target yield criterion that matches the initial titanium material according to the stress-strain curve.
[0049] In the embodiment of the present disclosure, after the initial titanium material is subjected to biaxial stretching to obtain a stress-strain curve, a target yield criterion that matches the initial titanium material may be determined based on the stress-strain curve.
[0050] Optionally, in some embodiments, determining a target yield criterion that is compatible with the initial titanium material based on the stress-strain curve can be accomplished by obtaining a candidate yield trajectory curve of the initial titanium material based on each candidate yield criterion, wherein the candidate yield criteria include: Mises yield criterion (Mises) and Hill yield criterion (for example, Hill48), determining an initial yield trajectory curve of the initial titanium material based on the stress-strain curve, determining a similarity value between the initial yield trajectory curve and each candidate yield trajectory curve, and determining the candidate yield criterion corresponding to the largest similarity value as the target yield criterion.
[0051] That is to say, in the embodiment of the present disclosure, the yield behavior of the titanium foil can be determined by adopting the principle of plastic work per unit volume, and the initial yield trajectory curve can be obtained from the true stress-strain curve under different loading ratios of RD and TD (4:1, 4:2, 4:3, 4:4, 3:4, 2:4, 1:4).
[0052] The similarity value between the initial yield trajectory curve and each candidate yield trajectory curve may be, for example, an average distance between the initial yield trajectory curve and each candidate yield trajectory curve, a cosine similarity between the initial yield trajectory curve and each candidate yield trajectory curve, etc., and there is no limitation on this.
[0053] That is to say, in the embodiment of the present disclosure, a candidate yield trajectory curve of the initial titanium material based on each candidate yield criterion can be obtained, wherein the candidate yield criteria include: Mises yield criterion (Mises) and Hill yield criterion (for example, Hill48), and the initial yield trajectory curve of the initial titanium material is determined according to the stress-strain curve, and the similarity value between the initial yield trajectory curve and each candidate yield trajectory curve is determined, and the candidate yield criterion corresponding to the similarity value with the largest value is determined as the target yield criterion.
[0054] For example, in the embodiments of the present disclosure, see Figure 3 , Figure 3 is a schematic diagram of the comparison of the yield trajectory curves proposed in an embodiment of the present disclosure, that is, the candidate yield trajectory curves of the initial titanium material based on each candidate yield criterion are obtained, and the initial yield trajectory curve is determined, and the candidate yield trajectory curves of each candidate yield criterion and the initial yield trajectory curve are displayed in the same figure, Figure 3 It can be seen that the initial yield trajectory curve and the candidate yield trajectory curve corresponding to the Hill48 criterion are relatively close (that is, the similarity between the initial yield trajectory curve and the candidate yield trajectory curve corresponding to the Hill48 criterion is high), so the Hill48 criterion can be determined as the target yield criterion.
[0055] S104: generating an initial mold model according to the initial mold parameters, and generating an initial material model of the initial titanium material according to the mechanical property parameters and the target yield criterion.
[0056] In the disclosed embodiment, an initial mold model may be constructed using three-dimensional software according to initial mold parameters, assembled in finite element software, and an initial material model may be constructed in finite element software according to mechanical property parameters and target yield criterion.
[0057] S105: performing a forming and stamping simulation test on the initial material model and the initial die model according to the preset boundary conditions and the preset friction coefficient to obtain a simulation test result, wherein the simulation test result includes: a forming limit diagram FLD damage value of the initial titanium material.
[0058] In the disclosed embodiment, contact attributes can be added to define the master / slave surface contact between the upper surface of the punch and the lower surface of the plate, and between the lower surface of the die and the upper surface of the plate, and the friction coefficient is set to 0.05-0.15. A stamping analysis step is set, and each component is meshed. The calculation efficiency and calculation accuracy of the finite element analysis are comprehensively considered. When dividing the mold mesh, ensure that the number of local meshes in the fillet part is more than 5.
[0059] Optionally, in some embodiments, a forming and stamping simulation test is performed on the initial material model and the initial mold model according to preset boundary conditions and preset friction coefficients to obtain simulation test results. The stamping forming analysis may be configured as a dynamic explicit type, and the closure of the punch and die of the initial mold model is controlled according to the preset friction coefficient and the preset boundary conditions, the initial material model is formed and stamped to obtain a first material model, a static analysis is performed on the first material model to obtain a second material model, the stamping forming analysis is configured as the dynamic explicit type, and the closure of the punch and die of the initial mold model is controlled according to the preset friction coefficient and the preset boundary conditions, the second material model is formed and stamped to obtain a third material model, and a static analysis is performed on the third material model to obtain a fourth material model; the simulation test results are determined based on the fourth material model.
[0060] That is to say, in the disclosed embodiment, a stamping process scheme may be designed to determine the forming process parameters: the two-step stamping forming process achieves uniform thinning of the electrode plate through the rounded corner design of the first and second step convex and concave dies, thereby improving the forming performance of the titanium foil and realizing the forming of a highly dense flow channel. Therefore, the design of the two-step forming fillet is crucial for the determination of the stamping process. According to the forming target of the flow channel, r2≤r1-h, r2≥0.2mm, r2'=r1'≤r2+h are designed. Among them, r1 is the top fillet of the first step forming convex and concave dies, r1' is the bottom fillet of the first step forming convex and concave dies, r2 is the top fillet of the second step forming convex and concave dies, r2' is the bottom fillet of the second step forming convex and concave dies, and h is the thickness of the titanium substrate.
[0061] That is to say, in the disclosed embodiment, a forming stamping simulation test may be performed, and the two-step stamping finite element analysis steps are as follows: the first step of the stamping forming analysis step is set as a dynamic explicit analysis, the punch is set as a fixed boundary condition, the closing distance of the punch and the die is determined until the gap between the punch and the die is 0.1 mm, and the stamping forming is realized; after the analysis is completed, the previous step model is copied and the first step of the stamping springback analysis is reset to a static analysis, and the first step of the stamping result is applied to the sheet as a predefined field while deleting the constraints and interactions of the convex and concave dies, simulating the deformation state of the plate after the stamping force is removed; further, the above results are applied to the titanium plate in the form of a predefined field, and the second step of stamping is set as a dynamic explicit analysis, the second step of forming convex and concave dies are imported into the model, the punch is set as a fixed boundary condition, the punch and the die are closed to a convex and concave gap of 0.1 mm, and the second step of stamping is completed; finally, the simulation process of the first step of stamping is repeated, the second step of stamping springback analysis is set as a static analysis, the second step of stamping results are applied to the sheet, the effect of the convex and concave dies is deleted, and the fourth material model is obtained.
[0062] In the disclosed embodiment, the simulation test result may be determined based on the material state of the fourth material model obtained after the two-step stamping.
[0063] Optionally, in some embodiments, the simulation test result is determined based on the fourth material model and the initial material model, and the material thinning rate of the fourth material model relative to the initial material model is obtained, and the material thinning rate is used as the simulation test result.
[0064] That is to say, in the embodiment of the present disclosure, the material thinning rate of the fourth material model relative to the initial material model may be obtained, and then the material thinning rate may be used as the simulation test result.
[0065] S106: Generate a target mold model according to the simulation test results and the initial mold model.
[0066] In the disclosed embodiment, a target mold model may be generated according to the simulation test results and the initial mold model.
[0067] Optionally, in some embodiments, a target mold model is generated based on simulation test results and the initial mold model. When the material thinning rate is less than a preset thinning rate threshold and the FLD damage value is less than the damage threshold, the initial mold model is used as the target mold model.
[0068] The preset thinning rate threshold may be, for example, 30%, which is not limited.
[0069] Among them, the FLD damage value can be used to evaluate the high-risk points in plate design.
[0070] In the disclosed embodiment, when the material thinning rate is less than 30% and the FLD damage value is less than the damage threshold, the initial mold model may be used as the target mold model. When the FLD damage value is greater than or equal to the damage threshold, it may be determined that the risk of cracking at the top of the runner is greater. Therefore, when designing the mold, it may be considered to increase the top radius or reduce the top height to reduce the risk of cracking.
[0071] In the disclosed embodiment, by obtaining the initial titanium material, the bipolar plate mold and the preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has the corresponding initial mold parameters, the initial titanium material is subjected to uniaxial stretching and biaxial stretching treatment to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material; according to the stress-strain curve, the target yield criterion adapted to the initial titanium material is determined; according to the initial mold parameters, an initial mold model is generated, and according to the mechanical property parameters and the target yield criterion, an initial material model of the initial titanium material is generated; according to the preset boundary conditions and the preset friction coefficient, the initial material model and the initial mold model are subjected to forming and stamping simulation tests to obtain simulation test results, wherein the simulation test results include: the forming limit diagram FLD damage value and the material thinning rate of the initial titanium material; according to the simulation test results and the initial mold model, a target mold model is generated, thereby enabling the analysis of the two-step stamping forming behavior of the titanium material to be efficiently and conveniently realized, and the feasibility of the mold design to be quickly determined from the perspective of material thinning.
[0072] Figure 4 It is a structural schematic diagram of a titanium pole plate mold generating device proposed in one embodiment of the present disclosure.
[0073] like Figure 4 As shown, the titanium pole plate mold generating device 40 comprises:
[0074] An acquisition module 401 is used to acquire an initial titanium material, a bipolar plate mold, and a preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has corresponding initial mold parameters;
[0075] The first determination module 402 is used to perform uniaxial stretching and biaxial stretching on the initial titanium material to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material;
[0076] The second determination module 403 is used to determine the target yield criterion adapted to the initial titanium material according to the stress-strain curve;
[0077] A generating module 404 is used to generate an initial mold model according to the initial mold parameters, and to generate an initial material model of the initial titanium material according to the mechanical property parameters and the target yield criterion;
[0078] The test module 405 is used to perform a forming and stamping simulation test on the initial material model and the initial mold model according to the preset boundary conditions and the preset friction coefficient to obtain the simulation test results, wherein the simulation test results include: the forming limit diagram FLD damage value and the material thinning rate of the initial titanium material;
[0079] The generation module 406 is used to generate a target mold model according to the simulation test results and the initial mold model.
[0080] In some embodiments of the present disclosure, the second determining module 403 is further configured to:
[0081] Obtaining a candidate yield locus curve of the initial titanium material based on each candidate yield criterion, wherein the candidate yield criterion includes: Mises yield criterion and Hill yield criterion;
[0082] According to the stress-strain curve, the initial yield trajectory curve of the initial titanium material is determined;
[0083] determining a similarity value between the initial yield locus curve and each candidate yield locus curve;
[0084] The candidate yield criterion corresponding to the largest similarity value is determined as the target yield criterion.
[0085] In some embodiments of the present disclosure, the testing module 405 is further configured to:
[0086] The stamping forming analysis is configured as a dynamic explicit type, and the closure of the male and female dies of the initial mold model is controlled according to the preset friction coefficient and the preset boundary condition, and the initial material model is stamped to obtain a first material model;
[0087] Performing static analysis on the first material model to obtain a second material model;
[0088] Configuring the stamping forming analysis to be the dynamic explicit type, and then controlling the closing of the male and female dies of the initial mold model according to the preset friction coefficient and the preset boundary condition, performing forming stamping on the second material model to obtain a third material model;
[0089] Performing static analysis on the third material model to obtain a fourth material model;
[0090] The simulation test result is determined according to the fourth material model.
[0091] In some embodiments of the present disclosure, the testing module 405 is further configured to:
[0092] Obtaining a material thinning rate of the fourth material model relative to the initial material model;
[0093] The material thinning rate is taken as the simulation test result.
[0094] In some embodiments of the present disclosure, the generating module 406 is further configured to:
[0095] When the material thinning rate is less than the preset thinning rate threshold and the FLD damage value is less than the damage threshold, the initial mold model is used as the target mold model.
[0096] It should be noted that the aforementioned explanation of the titanium pole plate mold generation method is also applicable to the titanium pole plate mold generation device of this embodiment, and will not be repeated here.
[0097] In an embodiment of the present disclosure, an initial titanium material, a bipolar plate mold, and a preset friction coefficient between the initial titanium material and the bipolar plate mold are obtained, wherein the bipolar plate mold has corresponding initial mold parameters, and the initial titanium material is subjected to uniaxial stretching and biaxial stretching treatment to determine the forming limit curve, mechanical property parameters, and stress-strain curve of the initial titanium material; according to the stress-strain curve, a target yield criterion adapted to the initial titanium material is determined; according to the initial mold parameters, an initial mold model is generated, and according to the mechanical property parameters and the target yield criterion, an initial material model of the initial titanium material is generated; according to the preset boundary conditions and the preset friction coefficient, a forming and stamping simulation test is performed on the initial material model and the initial mold model to obtain a simulation test result, wherein the simulation test result includes: a forming limit diagram FLD damage value and a material thinning rate of the initial titanium material; according to the simulation test results and the initial mold model, a target mold model is generated, thereby enabling efficient and convenient analysis of the two-step stamping forming behavior of the titanium material, and quickly determining the feasibility of the mold design from the perspective of material thinning.
[0098] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. Figure 5The electronic device 12 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.
[0099] like Figure 5 As shown, the electronic device 12 is in the form of a general purpose computing device. The components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).
[0100] The bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor or a local bus using any of a variety of bus structures. For example, these architectures include but are not limited to Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus and Peripheral Component Interconnection (PCI) bus.
[0101] The electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.
[0102] The memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 5 Not shown, often called a "hard drive").
[0103] although Figure 5Not shown, a disk drive for reading and writing a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing a removable non-volatile optical disk (e.g., a compact disc read only memory (Compact Disc Read Only Memory; hereinafter referred to as: CD-ROM), a digital versatile disc read only memory (Digital Video Disc Read Only Memory; hereinafter referred to as: DVD-ROM) or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present disclosure.
[0104] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28, such program modules 42 including but not limited to an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described in the present disclosure.
[0105] The electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), may also communicate with one or more devices that enable the human body to interact with the electronic device 12, and / or communicate with any device that enables the electronic device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through an input / output (I / O) interface 22. In addition, the electronic device 12 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 20. As shown, the network adapter 20 communicates with other modules of the electronic device 12 through a bus 18. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
[0106] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28, such as implementing the titanium pole plate mold generation method mentioned in the above embodiment.
[0107] In order to implement the above embodiments, the present disclosure also proposes a non-temporary computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method for generating a titanium pole plate mold proposed in the above embodiments of the present disclosure is implemented.
[0108] In order to implement the above embodiments, the present disclosure further proposes a computer program product. When the instruction processor in the computer program product is executed, the titanium pole plate mold generation method proposed in the above embodiments of the present disclosure is executed.
[0109] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.
[0110] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
[0111] It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.
[0112] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.
[0113] It should be understood that the various parts of the present disclosure can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.
[0114] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.
[0115] In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.
[0116] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.
[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0118] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.
Claims
1. A method for producing a titanium pole plate mold, characterized in that: The method comprises: Acquiring an initial titanium material, a bipolar plate mold, and a preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has corresponding initial mold parameters; Performing uniaxial stretching and biaxial stretching treatment on the initial titanium material to determine the forming limit curve, mechanical property parameters and stress-strain curve of the initial titanium material; Determining a target yield criterion that matches the initial titanium material according to the stress-strain curve; Generate an initial mold model according to the initial mold parameters, and generate an initial material model of the initial titanium material according to the mechanical property parameters and the target yield criterion; According to the preset boundary conditions and the preset friction coefficient, the initial material model and the initial die model are subjected to a forming and stamping simulation test to obtain a simulation test result, wherein the simulation test result includes: a forming limit diagram FLD damage value and a material thinning rate of the initial titanium material; A target mold model is generated according to the simulation test results and the initial mold model.
2. The method according to claim 1, characterized in that Determining a target yield criterion that matches the initial titanium material according to the stress-strain curve includes: Obtaining a candidate yield locus curve of the initial titanium material based on each candidate yield criterion, wherein the candidate yield criterion includes: Mises yield criterion and Hill yield criterion; Determining an initial yield locus curve of the initial titanium material according to the stress-strain curve; determining a similarity value between the initial yield locus curve and each of the candidate yield locus curves; The candidate yield criterion corresponding to the largest similarity value is determined as the target yield criterion.
3. The method according to claim 1, characterized in that The forming and stamping simulation test is performed on the initial material model and the initial mold model according to the preset boundary conditions and the preset friction coefficient to obtain the simulation test results, including: The stamping forming analysis is configured as a dynamic explicit type, and the closure of the male and female dies of the initial mold model is controlled according to the preset friction coefficient and the preset boundary condition, and the initial material model is stamped to obtain a first material model; Performing static analysis on the first material model to obtain a second material model; Configuring the stamping forming analysis to be the dynamic explicit type, and then controlling the closing of the male and female dies of the initial mold model according to the preset friction coefficient and the preset boundary conditions, and performing forming stamping on the second material model to obtain a third material model; Performing static analysis on the third material model to obtain a fourth material model; The simulation test result is determined according to the fourth material model.
4. The method according to claim 3, characterized in that Determining the simulation test result according to the fourth material model includes: Obtaining a material thinning rate of the fourth material model relative to the initial material model; The material thinning rate is taken as the simulation test result.
5. The method according to claim 1, characterized in that The step of generating a target mold model according to the simulation test result and the initial mold model includes: When the material thinning rate is less than a preset thinning rate threshold, and the FLD damage value is less than a damage threshold, the initial mold model is used as the target mold model.
6. A titanium plate mold production device, characterized in that: The device comprises: An acquisition module, used to acquire an initial titanium material, a bipolar plate mold, and a preset friction coefficient between the initial titanium material and the bipolar plate mold, wherein the bipolar plate mold has corresponding initial mold parameters; A first determination module is used to perform uniaxial stretching and biaxial stretching treatment on the initial titanium material to determine a forming limit curve, mechanical property parameters and a stress-strain curve of the initial titanium material; A second determination module is used to determine a target yield criterion adapted to the initial titanium material according to the stress-strain curve; A generating module, used to generate an initial mold model according to the initial mold parameters, and to generate an initial material model of the initial titanium material according to the mechanical property parameters and the target yield criterion; A testing module, used for performing a forming and stamping simulation test on the initial material model and the initial mold model according to a preset boundary condition and the preset friction coefficient to obtain a simulation test result, wherein the simulation test result includes: a forming limit diagram FLD damage value and a material thinning rate of the initial titanium material; A generating module is used to generate a target mold model according to the simulation test result and the initial mold model.
7. The device according to claim 6, characterized in that The second determining module is further used for: Obtaining a candidate yield locus curve of the initial titanium material based on each candidate yield criterion, wherein the candidate yield criterion includes: Mises yield criterion and Hill yield criterion; Determining an initial yield locus curve of the initial titanium material according to the stress-strain curve; determining a similarity value between the initial yield locus curve and each of the candidate yield locus curves; The candidate yield criterion corresponding to the largest similarity value is determined as the target yield criterion.
8. The device according to claim 6, characterized in that The test module is also used for: The stamping forming analysis is configured as a dynamic explicit type, and the closure of the male and female dies of the initial mold model is controlled according to the preset friction coefficient and the preset boundary condition, and the initial material model is stamped to obtain a first material model; Performing static analysis on the first material model to obtain a second material model; Configuring the stamping forming analysis to be the dynamic explicit type, and then controlling the closing of the male and female dies of the initial mold model according to the preset friction coefficient and the preset boundary conditions, and performing forming stamping on the second material model to obtain a third material model; Performing static analysis on the third material model to obtain a fourth material model; The simulation test result is determined according to the fourth material model.
9. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 5.
10. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: in, The computer instructions are used to cause the computer to execute the method according to any one of claims 1 to 5.