Methods, apparatus, media and equipment for testing steel billet forming process parameters

Abstract

This application discloses a method, apparatus, medium, and equipment for testing steel billet forming process parameters. The method includes: a first acquisition step: acquiring an initial steel billet model. A second acquisition step: performing a flanging process test on the steel billet model to acquire the target region of the steel billet model and the secondary strain vector at the location of the maximum thinning rate within the target region. The target region is the area in the steel billet model under tensile strain. An adjustment step: adjusting the contour of the target region according to the secondary strain vector, and then re-executing the second acquisition step after adjusting the contour of the target region. A determination step: cyclically executing the second acquisition step and the adjustment step until the parameter value of the acquired target secondary strain vector is less than or equal to a preset parameter threshold, thus obtaining the target contour of the steel billet model. When the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target region is transformed into a plane strain state. The embodiments of this application can improve the formability of steel billets.

Description

Technical Field

[0001] This application belongs to the field of billet forming technology, and in particular relates to a method, apparatus, medium and equipment for testing billet forming process parameters. Background Technology

[0002] Steel billets can be used to manufacture product parts and are widely used in various fields, such as the automotive industry. High-strength steel is a preferred material for automotive parts to achieve lightweighting.

[0003] However, edge cracking may occur during the cold stamping process of steel billets, such as in elongation-type flanging processes. Summary of the Invention

[0004] The embodiments of this application provide a method, apparatus, medium, and equipment for testing steel billet forming process parameters, which can at least improve the formability of steel billets to a certain extent.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to a first aspect of the embodiments of this application, a method for testing steel billet forming process parameters is provided, including:

[0007] First step: Obtain the initial billet model;

[0008] The second acquisition step is to perform a flanging process test on the billet model to obtain the target area of ​​the billet model and the secondary strain vector of the position of the maximum thinning rate within the target area. The target area is the region in the billet model that is in a tensile strain state.

[0009] Adjustment steps: Adjust the contour of the target region according to the secondary strain vector, and then re-execute the second acquisition step after adjusting the contour of the target region;

[0010] Determining steps: Repeatedly execute the second acquisition step and the adjustment step until the parameter value of the acquired target secondary strain vector is less than or equal to a preset parameter threshold, and obtain the target contour of the billet model. When the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target region is transformed into a plane strain state.

[0011] Optionally, adjusting the contour of the target region according to the secondary strain vector includes:

[0012] The width adjustment direction of the target region is determined based on the direction of the secondary strain vector, and the width adjustment step size of the target region is determined based on the parameter value of the secondary strain vector.

[0013] The width of the target region is adjusted according to the width adjustment direction and the width adjustment step size;

[0014] The target area with adjusted width is connected to adjacent areas using a smooth curve to obtain the outline of the adjusted target area.

[0015] Optionally, determining the width adjustment direction of the target region based on the direction of the secondary strain vector includes:

[0016] If the direction of the secondary strain vector is negative, then the direction of width adjustment of the target region is to increase;

[0017] If the direction of the secondary strain vector is positive, then the direction of width adjustment of the target region is to decrease.

[0018] Optionally, determining the width adjustment step size of the target region based on the parameter values ​​of the secondary strain vector includes:

[0019] According to a preset correspondence, the width adjustment step size corresponding to the parameter value of the secondary strain vector is determined, wherein the width adjustment step size is different when the parameter value of the secondary strain vector is in different parameter ranges.

[0020] Optionally, the width adjustment step size corresponding to the parameter values ​​of the secondary strain vector is determined based on the following correspondence:

[0021]

[0022] Where ε2 represents the secondary strain vector, and f(ε2) represents the width adjustment step size.

[0023] Optionally, after obtaining the target profile of the billet model, the method further includes:

[0024] Based on the target profile of the billet model, the stamping forming equipment is controlled to stamp the target billet to obtain the first steel plate.

[0025] Optionally, after the controlled stamping forming equipment stamps the target steel billet, the method further includes:

[0026] The trimming device is controlled to cut and trim the first steel plate to obtain a second steel plate corresponding to the outline of the initial steel billet model.

[0027] According to a second aspect of the embodiments of this application, a process parameter testing device for billet forming is provided, comprising:

[0028] The first acquisition module is used to perform the first acquisition step: acquiring the initial billet model;

[0029] The second acquisition module is used to perform the second acquisition step: perform a flanging process test on the billet model, and acquire the target area of ​​the billet model and the secondary strain vector of the position of the maximum thinning rate in the target area, wherein the target area is the area in the billet model that is in a tensile strain state.

[0030] An adjustment module is used to perform the adjustment steps: adjusting the contour of the target region according to the secondary strain vector, and re-executing the second acquisition step after adjusting the contour of the target region;

[0031] The determination module is used to perform the determination step: cyclically execute the second acquisition step and the adjustment step until the parameter value of the acquired target secondary strain vector is less than or equal to a preset parameter threshold, and obtain the target contour of the billet model, wherein when the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target region is transformed into a plane strain state.

[0032] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to perform the operation as described in any of the methods in the first aspect.

[0033] According to a fourth aspect of the present application, an electronic device is provided, including one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, the at least one piece of program code being loaded and executed by the one or more processors to perform the operations performed as described in any of the methods in the first aspect.

[0034] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0035] The billet forming process parameter testing method of this application includes: a first acquisition step: acquiring an initial billet model. A second acquisition step: performing a flanging process test on the billet model to acquire the target area of ​​the billet model and the secondary strain vector at the location of the maximum thinning rate within the target area. The target area is the region in the billet model that is in a tensile strain state. An adjustment step: adjusting the contour of the target area according to the secondary strain vector, and repeating the second acquisition step after adjusting the contour of the target area. A determination step: cyclically executing the second acquisition step and the adjustment step until the parameter value of the acquired target secondary strain vector is less than or equal to a preset parameter threshold, thus obtaining the target contour of the billet model. When the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target area is transformed into a plane strain state. Therefore, this application, by changing the contour shape of the billet model, transforms the target area from a tensile strain state to a plane strain state, thereby dispersing the concentrated stress in the target area to the entire deformation area, thus helping to improve the formability of the billet in the subsequent billet forming process.

[0036] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0037] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0038] Figure 1 A flowchart of a method for testing steel billet forming process parameters according to an embodiment of this application is shown;

[0039] Figure 2 A schematic outline of the initial billet model according to an embodiment of this application is shown;

[0040] Figure 3 This illustration shows a cross-sectional view of the initial billet model of an embodiment of this application after the flanging process.

[0041] Figure 4 A schematic diagram of the target contour of a billet model according to an embodiment of this application is shown;

[0042] Figure 5 This illustration shows a cross-sectional view of a steel billet model with a target profile according to an embodiment of this application after undergoing a flanging process.

[0043] Figure 6A structural diagram of the billet forming process parameter testing method according to an embodiment of this application is shown;

[0044] Figure 7 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0046] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0047] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different models and / or processor devices and / or microcontroller devices.

[0048] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0049] It should also be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0050] In recent years, automobiles have brought great convenience to people's travel. While the automotive industry has developed rapidly, environmental protection and energy conservation and emission reduction have become key areas that the automotive manufacturing industry needs to coordinate. Reducing the overall weight of a car can reduce fuel consumption.

[0051] One way to achieve lightweighting is to use new materials. Among them, steel is a better choice for automotive materials. High-strength steel exhibits superior comprehensive performance in terms of strength, plasticity and impact resistance. Its application can achieve vehicle lightweighting and improve the overall crashworthiness of the car, as well as improve the car's starting acceleration and braking performance.

[0052] However, despite the excellent application results of advanced high-strength steel in automobile manufacturing, many forming problems exist in cold stamping, among which edge cracking is one of the main issues. For example, edge cracking may occur in elongation-type flanging or hole-expanding processes, resulting in poor formability of high-strength steel and reduced product yield.

[0053] In the design and manufacturing of automotive structural components, CAE (Computer Aided Engineering) can accurately predict the occurrence of forming defects in some complex forming processes. However, edge cracking of materials is affected by many factors, such as material properties, processing technology, and cross-sectional quality.

[0054] In actual production, the strain process often results in local failure or cracking before reaching the traditional simulated forming limit. This is because wear of the mold, fluctuation of the mold gap, and roughening defects on the surface of the part can all cause uneven stress on the parts during preforming, leading to cracking when the stress concentration is severe.

[0055] In view of this, in order to improve or avoid abnormal cracking caused by stress concentration, this application provides a method for testing billet forming process parameters, thereby optimizing the billet shape and reducing the risk of forming cracks in elongation-type flanging processes.

[0056] The following description, in conjunction with the accompanying drawings, illustrates the method for testing the billet forming process parameters according to an embodiment of this application.

[0057] Figure 1 A flowchart of a method for testing steel billet forming process parameters according to an embodiment of this application is shown. Figure 2 A schematic outline of the initial billet model according to an embodiment of this application is shown. Figure 3 This diagram shows a cross-sectional view of the initial billet model after the flanging process, according to an embodiment of this application. Figure 4 A schematic diagram of the target profile of a billet model according to an embodiment of this application is shown. Figure 5 This illustration shows a cross-sectional view of a steel billet model with a target profile according to an embodiment of this application after undergoing a flanging process.

[0058] According to a first aspect of the embodiments of this application, a method for testing steel billet forming process parameters is provided, which can be executed on a control terminal of the steel billet forming process, such as an industrial computer, and the method includes, but is not limited to:

[0059] S1: First acquisition step: Obtain the initial steel billet model;

[0060] For example, taking a beam-type part of an automobile chassis as an example, the forming process of the beam-type part is determined, including blanking, preforming, and flanging. A process test model for the beam-type part is established, and the test information of the selected material is imported. The establishment of this test information requires data from two types of tests: 1. Mechanical tensile stress-strain curves selected with respect to the rolling direction (including but not limited to the 0° direction, 45° direction, and 90° direction); 2. Forming limit test to obtain the forming limit curve.

[0061] Figure 2 An initial billet model is shown. It can be understood that this initial billet model is a billet model corresponding to beam-type parts. That is, after the billet prepared based on the initial billet model is blanked, pre-formed and flanged (or may also include punching), the required contour shape of the beam-type parts can be obtained.

[0062] S2: Second acquisition step: Perform a flanging process test on the billet model to obtain the target area of ​​the billet model and the secondary strain vector of the position of the maximum thinning rate in the target area. The target area is the area in the billet model that is in a tensile strain state.

[0063] Tensile strain state refers to the state in which the billet mold deforms under tensile force during the flanging process.

[0064] Thinning rate refers to the proportion by which the thickness of a material decreases during processing. It can usually be expressed as the ratio between the difference between the original thickness and the final thickness and the original thickness. Corresponding to the embodiments of this application, in the flanging forming process, the thinning rate may be different at different positions of the billet model, and the maximum thinning rate refers to the position with the largest thinning rate among all positions.

[0065] It is understandable that during the flanging process, the target area of ​​the billet model deforms under tension, resulting in a reduction in thickness. In elongation-type flanging processes, the maximum thinning rate is usually located at the edge (the extension direction of this edge is the length direction of the billet model), meaning that the target area may also be an area with a certain edge length.

[0066] Obtaining the target area of ​​the billet model and the location of the maximum thinning rate within the target area can be achieved by using simulation to perform a stamping and flanging forming simulation on the billet model, thereby obtaining the target area and the location of the maximum thinning rate. For example, after using printed mesh or sprayed speckle, a stamping and flanging forming simulation can be performed, and the location of the maximum thinning rate can be obtained after DIC (Digital Image Correlation) processing.

[0067] Understandably, the secondary strain vector refers to the strain along the tensile direction in the target area when subjected to tensile force. When the secondary strain vector is negative, it indicates that the billet model has deformed under tension. In the target area, the parameter value of the secondary strain vector at the location of the maximum thinning rate is greater than the parameter value of the secondary strain vector at other locations. Therefore, if the parameter value of the secondary strain vector at the location of the maximum thinning rate is less than a certain calibration value (e.g., 0.08, 0.10, etc.), then the parameter values ​​of the secondary strain vector at other locations in the target area are also less than a certain calibration value.

[0068] S3: Adjustment step: Adjust the contour of the target region according to the secondary strain vector, and re-execute the second acquisition step after adjusting the contour of the target region;

[0069] In some embodiments, adjusting the contour of the target region according to the secondary strain vector includes:

[0070] S31. Determine the width adjustment direction of the target region based on the direction of the secondary strain vector, and determine the width adjustment step size of the target region based on the parameter value of the secondary strain vector;

[0071] In some embodiments, determining the width adjustment direction of the target region based on the direction of the secondary strain vector includes:

[0072] If the direction of the secondary strain vector is negative, then the direction of width adjustment of the target region is to increase;

[0073] If the direction of the secondary strain vector is positive, then the direction of width adjustment of the target region is to decrease.

[0074] It is understandable that when the direction of the strain vector is negative, it indicates that the target area is subjected to tensile deformation. Therefore, increasing the width of the target area can further disperse the concentrated stress in the target area, thereby helping to improve the formability of the billet in the subsequent billet forming process.

[0075] In some embodiments, determining the width adjustment step size of the target region based on the parameter values ​​of the secondary strain vector includes:

[0076] According to a preset correspondence, the width adjustment step size corresponding to the parameter value of the secondary strain vector is determined, wherein the width adjustment step size is different when the parameter value of the secondary strain vector is in different parameter ranges.

[0077] Optionally, the width adjustment step size corresponding to the parameter values ​​of the secondary strain vector is determined based on the following correspondence:

[0078]

[0079] Where ε2 represents the secondary strain vector, and f(ε2) represents the width adjustment step size.

[0080] S32. Adjust the width of the target area according to the width adjustment direction and the width adjustment step size;

[0081] S33. Connect the target area with the adjacent areas after width adjustment through a smooth curve to obtain the outline of the adjusted target area.

[0082] S4: Determine the step: Repeatedly execute the second acquisition step and the adjustment step until the parameter value of the acquired target secondary strain vector is less than or equal to the preset parameter threshold, and obtain the target contour of the billet model. When the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target region is transformed into a plane strain state.

[0083] To make it easier to understand, the following examples are provided:

[0084] For example: First, the initial billet model is as follows: Figure 2 As shown, the location of the maximum thinning rate in the tensile strain during the flanging process and the secondary strain vector at that location are determined by simulating the initial billet model. 21 = -0.153, and determine the length in the tensile strain state, i.e., the target region, where the cross-section of the initial billet model after the flanging process is as follows. Figure 3 As shown.

[0085] Then, based on the above correspondence, since 0.12 < |ε 21 |=0.153<0.20, the corresponding width adjustment step value is 3mm, that is, the length region under tensile strain is taken as the target region, and it is extended outward by 3mm (the width is increased by 3mm). The two ends of the target region in the length direction are connected to the original outer contour line through a smooth curve to obtain the outer contour line of the billet model after the first optimization.

[0086] Subsequently, the second acquisition step is performed, which involves shaping the billet outline after the first optimization in the flanging process to obtain the location of the maximum thinning rate and its secondary strain vector, ε, from the second simulation results.22 = -0.123. Similarly, since 0.12 < |ε 22 | = 0.123 < 0.20, the corresponding width adjustment step value is 3 mm. Then, the second width adjustment direction is to extend outward with a step value of 3 mm. Connect the two ends of the target area in the length direction to the original outer contour line through a smooth curve to obtain the outer contour line of the billet model after the second optimization adjustment.

[0087] Subsequently, return to execute the second acquisition step, that is, form the billet contour line after the second optimization in the flanging process to obtain the position of the maximum thinning rate and its secondary strain vector of the third simulation result.

[0088] ε 23 = -0.088. Since 0.08 < |ε 23 | = 0.088 < 0.12, the corresponding width adjustment step is 1 mm. Connect the two ends of the target area in the length direction to the original outer contour line through a smooth curve to obtain the outer contour line of the billet model after the third optimization adjustment, as Figure 4 shown, Figure 4 the target area is within the dashed box in

[0089] Finally, return to execute the second acquisition step, that is, form the billet contour line after the third optimization in the flanging process to obtain the position of the maximum thinning rate and its secondary strain vector of the fourth simulation result, ε 24 = -0.072. Since |ε 24 | < 0.08, which is less than the preset parameter threshold and meets the parameter value requirements of the secondary strain vector. After the flanging process of the billet model at this time, its cross-section is as Figure 5 shown, Figure 5 the target area is within the dashed box in

[0090] In some embodiments, after obtaining the target contour of the billet model, the method further includes:

[0091] According to the target contour of the billet model, control the stamping forming equipment to stamp and form the target billet to obtain the first steel plate.

[0092] Understandably, after obtaining the target profile of the billet model through CAE (Computer Aided Engineering) testing, in actual processing, the stamping equipment can be controlled to stamp the target billet according to the target profile of the billet model, thereby obtaining the first steel plate. In other words, the target profile of the billet model can provide data support for the actual stamping of the target billet.

[0093] In some embodiments, after the controlled stamping forming equipment stamps the target steel billet, the method further includes:

[0094] The trimming device is controlled to cut and trim the first steel plate to obtain a second steel plate corresponding to the outline of the initial steel billet model.

[0095] Understandably, since the initial billet model corresponds to the beam-type part, the billet prepared based on the initial billet model, after blanking, pre-forming, and flanging (or even punching), can obtain the required contour shape of the beam-type part. However, if the target billet adopts the shape corresponding to the initial billet model, edge breakage and other problems may occur during the flanging process, affecting the formability of the product. Therefore, after obtaining the target contour of the billet model through CAE testing, this application uses a target billet corresponding to the target contour of the billet model for stamping and flanging. This increases the deformation area of ​​the billet, resulting in more uniform deformation in the stretching direction and eliminating the problem of excessive thinning or forming cracks caused by stress concentration. Subsequently, the excess edges are trimmed through a trimming process, thus still obtaining a second steel plate corresponding to the beam-type part.

[0096] For example, the trimming die is used to cut along the normal of the part's cross section. This side-cutting process ensures good cross-sectional quality of the trimming line, removes the additional surface added by the extension, and cuts the outline along the outer contour of the part. This ensures that no further trimming is required after this process.

[0097] See Figure 6 The diagram shows a structural block diagram of a process parameter testing device for billet forming according to an embodiment of this application.

[0098] According to a second aspect of the embodiments of this application, a process parameter testing device 200 for billet forming is provided, comprising:

[0099] The first acquisition module 201 is used to perform the first acquisition step: acquiring the initial billet model;

[0100] The second acquisition module 202 is used to perform the second acquisition step: perform a flanging process test on the billet model, and acquire the target area of ​​the billet model and the secondary strain vector of the position of the maximum thinning rate in the target area, wherein the target area is the area in the billet model that is in a tensile strain state.

[0101] Adjustment module 203 is used to perform the adjustment steps: adjusting the contour of the target region according to the secondary strain vector, and re-executing the second acquisition step after adjusting the contour of the target region;

[0102] The determination module 204 is used to perform the determination step: cyclically execute the second acquisition step and the adjustment step until the parameter value of the acquired target secondary strain vector is less than or equal to a preset parameter threshold, and obtain the target contour of the billet model. When the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target region is transformed into a plane strain state.

[0103] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to perform the operation as described in any of the methods in the first aspect.

[0104] Computer-readable storage media may be portable compact disc read-only memory (CD-ROM) and include program code, and may run on a terminal device, such as a personal computer. However, the computer-readable storage medium of this application is not limited thereto. In this application, the readable storage medium may be any tangible medium that contains or stores a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0105] A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0106] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0107] According to a fourth aspect of the embodiments of this application, an electronic device is provided, including one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation as performed by any of the methods in the first aspect.

[0108] See Figure 7 This is a schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application.

[0109] like Figure 7 As shown, the electronic device 400 is manifested in the form of a general-purpose computing device. The components of the electronic device 400 may include, but are not limited to: at least one processing unit 410, at least one storage unit 420, and a bus 430 connecting different system components (including storage unit 420 and processing unit 410).

[0110] The storage unit stores program code, which can be executed by the processing unit 410, causing the processing unit 410 to perform the steps described in the "Embodiment Method" section above according to various exemplary embodiments of this application.

[0111] Storage unit 420 may include readable media in the form of volatile storage units, such as random access memory (RAM) 421 and / or cache 422, and may further include read-only memory (ROM) 423.

[0112] Storage unit 420 may also include a program / utility 424 having a set (at least one) of program modules 425, such program modules 425 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0113] Bus 430 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0114] Electronic device 400 can also communicate with one or more external devices 500 (e.g., keyboard, pointing device, Bluetooth device, etc.), one or more devices that enable a user to interact with electronic device 400, and / or any device that enables electronic device 400 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed through I / O (input / output) interface 450, which can also be connected to display unit 440 to display the communication content. Furthermore, electronic device 400 can communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) via network adapter 460. As shown, network adapter 460 communicates with other modules of electronic device 400 via bus 430. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 400, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0115] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0116] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0117] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0118] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0119] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for testing steel billet forming process parameters, characterized in that, include: First step: Obtain the initial billet model; The second acquisition step is to perform a flanging process test on the billet model to obtain the target area of ​​the billet model and the secondary strain vector of the position of the maximum thinning rate within the target area. The target area is the region in the billet model that is in a tensile strain state. Adjustment steps: Adjust the contour of the target region according to the secondary strain vector, and then re-execute the second acquisition step after adjusting the contour of the target region; Determining steps: Execute the second acquisition step and the adjustment step repeatedly until the parameter value of the acquired target secondary strain vector is less than or equal to a preset parameter threshold, and obtain the target contour of the billet model. When the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target region is transformed into a plane strain state. The step of adjusting the contour of the target region according to the secondary strain vector includes: The width adjustment direction of the target region is determined based on the direction of the secondary strain vector, and the width adjustment step size of the target region is determined based on the parameter value of the secondary strain vector. The width of the target region is adjusted according to the width adjustment direction and the width adjustment step size; The target area with adjusted width is connected to adjacent areas using a smooth curve to obtain the outline of the adjusted target area.

2. The method according to claim 1, characterized in that, Determining the width adjustment direction of the target region based on the direction of the secondary strain vector includes: If the direction of the secondary strain vector is negative, then the direction of width adjustment of the target region is to increase; If the direction of the secondary strain vector is positive, then the direction of width adjustment of the target region is to decrease.

3. The method according to claim 1, characterized in that, The step of determining the width adjustment step size of the target region based on the parameter values ​​of the secondary strain vector includes: According to a preset correspondence, the width adjustment step size corresponding to the parameter value of the secondary strain vector is determined, wherein the width adjustment step size is different when the parameter value of the secondary strain vector is in different parameter ranges.

4. The method according to claim 3, characterized in that, Based on the following correspondence, the width adjustment step size corresponding to the parameter values ​​of the secondary strain vector is determined: ； in, This represents the secondary strain vector. This indicates the width adjustment step size.

5. The method according to any one of claims 1-4, characterized in that, After obtaining the target profile of the billet model, the method further includes: Based on the target profile of the billet model, the stamping forming equipment is controlled to stamp the target billet to obtain the first steel plate.

6. The method according to claim 5, characterized in that, After the controlled stamping forming equipment stamps the target steel billet, the method further includes: The trimming device is controlled to cut and trim the first steel plate to obtain a second steel plate corresponding to the outline of the initial steel billet model.

7. A device for testing process parameters of steel billet forming, characterized in that, include: The first acquisition module is used to perform the first acquisition step: acquiring the initial billet model; The second acquisition module is used to perform the second acquisition step: perform a flanging process test on the billet model, and acquire the target area of ​​the billet model and the secondary strain vector of the position of the maximum thinning rate in the target area, wherein the target area is the area in the billet model that is in a tensile strain state. An adjustment module is used to perform the adjustment steps: adjusting the contour of the target region according to the secondary strain vector, and re-executing the second acquisition step after adjusting the contour of the target region; The determination module is used to perform the determination step: cyclically execute the second acquisition step and the adjustment step until the parameter value of the acquired target secondary strain vector is less than or equal to a preset parameter threshold, and obtain the target contour of the billet model, wherein when the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold, the target region is transformed into a plane strain state; The step of adjusting the contour of the target region according to the secondary strain vector includes: The width adjustment direction of the target region is determined based on the direction of the secondary strain vector, and the width adjustment step size of the target region is determined based on the parameter value of the secondary strain vector. The width of the target region is adjusted according to the width adjustment direction and the width adjustment step size; The target area with adjusted width is connected to adjacent areas using a smooth curve to obtain the outline of the adjusted target area.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program instruction, which is loaded and executed by a processor to perform the operation as described in any one of claims 1-6.

9. An electronic device comprising one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, the at least one piece of program code being loaded and executed by the one or more processors to perform the operation performed by the method as described in any one of claims 1-6.

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