Billet forming process parameter testing method, device, medium and equipment

Abstract

The invention discloses a steel billet forming process parameter testing method and device, a medium and equipment. The method comprises the following steps: a first acquisition step: acquiring an initial billet model; a second acquisition step: performing a flanging process test on the billet model to acquire a target area of the billet model and a secondary strain vector of a maximum thinning rate position in the target area, the target area being an area in a tensile strain state in the billet model; and an adjustment step: adjusting the contour of the target area according to the secondary strain vector, and re-executing the second acquisition step after the contour of the target area is adjusted. And a determining step: circularly executing the second obtaining step and the adjusting step until the parameter value of the obtained target secondary strain vector is less than or equal to a preset parameter threshold value, obtaining the target contour of the billet model, and converting the target area into a plane strain state when the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold value. The embodiment of the invention can improve the formability of the steel billet.

Description

Technical Field

[0001] This application belongs to the technical field of steel billet forming processes, and particularly relates to a method, device, medium, and equipment for testing steel billet forming process parameters. Background Art

[0002] Steel billets can be used to prepare product parts and are widely used in various fields, such as the automotive field. Among them, in order to achieve the lightweight of automotive parts, high-strength steel can be a better choice as a vehicle material.

[0003] However, during the cold stamping forming process of steel billets, there may be problems such as edge cracking, for example, edge cracking occurs in the elongation flanging process. Summary of the Invention

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

[0005] Other characteristics and advantages of this application will become apparent through the following detailed description, or will be learned partially through the practice of this application.

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

[0007] The first acquisition step: acquiring an initial steel billet model;

[0008] The second acquisition step: performing a flanging process test on the steel billet model, acquiring the target area of the steel billet model and the secondary strain vector at the position of the maximum thinning rate within the target area, where the target area is the area of the steel billet model in a tensile strain state;

[0009] The adjustment step: adjusting the contour of the target area according to the secondary strain vector, and re-performing the second acquisition step after adjusting the contour of the target area;

[0010] The determination step: repeatedly performing the second acquisition step and the adjustment step until the parameter value of the obtained target secondary strain vector is less than or equal to a preset parameter threshold, obtaining the target contour of the steel 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 area is transformed into a plane strain state.

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

[0012] Determine the width adjustment direction of the target area according to the direction of the secondary strain vector, and determine the width adjustment step of the target area according to the parameter value of the secondary strain vector;

[0013] Adjust the width of the target area according to the width adjustment direction and the width adjustment step;

[0014] Connect the target area with the adjusted width to the adjacent area through a smooth curve to obtain the contour of the adjusted target area.

[0015] Optionally, the determining the width adjustment direction of the target area according to the direction of the secondary strain vector includes:

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

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

[0018] Optionally, the determining the width adjustment step of the target area according to the parameter value of the secondary strain vector includes:

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

[0020] Optionally, based on the following correspondence, determine the width adjustment step corresponding to the parameter value of the secondary strain vector:

[0021]

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

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

[0024] According to the target contour of the billet model, control the stamping forming equipment to stamp and form the target billet to obtain a first steel plate.

[0025] Optionally, after controlling the stamping forming equipment to stamp and form the target billet, the method further includes:

[0026] Control the trimming equipment to shear and trim the first steel plate to obtain a second steel plate corresponding to the contour of the initial billet model.

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

[0028] A first acquisition module, configured to perform a first acquisition step: acquire an initial billet model;

[0029] A second acquisition module, configured to perform a second acquisition step: perform a flanging process test on the billet model, and acquire a target area of the billet model and a secondary strain vector at the position of the maximum thinning rate within the target area, where the target area is an area of the billet model in a tensile strain state;

[0030] An adjustment module, configured to perform an adjustment step: adjust the contour of the target area according to the secondary strain vector, and re - perform the second acquisition step after adjusting the contour of the target area;

[0031] A determination module, configured to perform a determination step: repeatedly perform 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 area is transformed into a plane strain state.

[0032] According to a third aspect of the embodiments of the present application, there is provided a computer - readable storage medium, in which at least one computer program instruction is stored, and the at least one computer program instruction is loaded and executed by a processor to implement the operations performed by the method according to any one of the first aspect.

[0033] According to a fourth aspect of the embodiments of the present application, there is provided an electronic device, including one or more processors and one or more memories, and at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method according to any one of the first aspect.

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

[0035] The method for testing the process parameters of steel billet forming in this application 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 obtain the target area of the steel billet model and the secondary strain vector at the position of the maximum thinning rate within the target area, where the target area is the area of the steel billet model in a tensile strain state. An adjustment step: adjusting the contour of the target area according to the secondary strain vector, and re-performing the second acquisition step after adjusting the contour of the target area. A determination step: repeatedly performing the second acquisition step and the adjustment step until the parameter value of the obtained target secondary strain vector is less than or equal to a preset parameter threshold, obtaining the target contour of the steel billet model, where 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. Thus, in this application, by changing the contour shape of the steel billet model, the target area is transformed from a tensile strain state to a plane strain state, so as to disperse the concentrated stress in the target area to the entire deformation area, and thus, in the subsequent steel billet forming process, it can assist in improving the formability of the steel billet.

[0036] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0037] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the drawings in the following description are only some embodiments of this application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0038] Figure 1 Shows the flowchart of the method for testing the process parameters of steel billet forming in the embodiment of this application;

[0039] Figure 2 Shows the schematic diagram of the contour of the initial steel billet model in the embodiment of this application;

[0040] Figure 3 Shows the schematic cross-sectional view of the initial steel billet model after the flanging process in the embodiment of this application;

[0041] Figure 4 Shows the schematic diagram of the target contour of the steel billet model in the embodiment of this application;

[0042] Figure 5 Shows the schematic cross-sectional view of the steel billet model with the target contour after the flanging process in the embodiment of this application.

[0043] Figure 6The structure diagram of the steel billet forming process parameter testing method according to the embodiment of the present application is shown;

[0044] Figure 7 The structural schematic diagram of the computer system of the electronic device suitable for implementing the embodiment of the present application is shown. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0046] In addition, the described features, structures or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to give a full understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present application.

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

[0048] The flowcharts shown in the drawings are only exemplary illustrations, and do not necessarily include all the contents and operations / steps, nor do they necessarily need to be executed in the described order. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined. Therefore, the actual execution order may be changed according to the actual situation.

[0049] It should also be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that the objects so used can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described.

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

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

[0052] However, although advanced high-strength steel has good application effects in automotive manufacturing, there are many forming problems in cold stamping forming, and edge cracking is one of the main problems. For example, edge cracking may occur in processes such as stretch flanging or hole expansion processes, resulting in poor formability of high-strength steel and a decrease in product yield.

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

[0054] In actual production, local failure or rupture often occurs before the strain process reaches the traditional forming limit. This is because the wear of the die, the fluctuation of the die gap, and the scratching defects on the surface of the part will all cause uneven stress on the part during pre-forming, resulting in cracking when the stress concentration is severe.

[0055] In view of this, in order to improve or avoid abnormal cracking caused by stress concentration, the embodiment of the present application provides a method for testing the forming process parameters of a steel billet, so as to optimize the shape of the blank in the stretch flanging process and reduce the risk of forming cracking.

[0056] The following describes the method for testing the forming process parameters of the steel billet in the embodiment of the present application with reference to specific drawings.

[0057] Figure 1 The flowchart of the method for testing the forming process parameters of the steel billet in the embodiment of the present application is shown. Figure 2 The schematic diagram of the contour of the initial steel billet model in the embodiment of the present application is shown. Figure 3 The schematic cross-sectional view of the initial steel billet model in the embodiment of the present application after the flanging process is shown. Figure 4 The schematic diagram of the target contour of the steel billet model in the embodiment of the present application is shown. Figure 5 The schematic cross-sectional view of the steel billet model with the target contour in the embodiment of the present application after the flanging process is shown.

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

[0059] S1: First acquisition step: Acquire an initial billet model;

[0060] Exemplarily, taking the beam-like parts of an automotive chassis as an example, determine the forming processes of the beam-like parts, including blanking, pre-forming, and flanging forming. Establish a process test model for the beam-like parts, and import the test information of the selected material. The establishment of this test information requires two types of test data: First, select the mechanical tensile stress-strain curves in the rolling direction (including but not limited to the 0° direction, 45° direction, and 90° direction); Second, obtain the forming limit curve through the forming limit test.

[0061] Figure 2 The initial billet model is shown. It can be understood that the initial billet model is the billet model corresponding to the beam-like parts, that is, the billet prepared based on the initial billet model can obtain the required contour shape of the beam-like parts after blanking, pre-forming, and flanging forming (or also including punching).

[0062] S2: Second acquisition step: Conduct a flanging process test on the billet model, and obtain the target area of the billet model and the secondary strain vector at the position of the maximum thinning rate within the target area. The target area is the area of the billet model in a tensile strain state;

[0063] The tensile strain state refers to the state in which the billet model deforms under the action of tensile force during the flanging process.

[0064] The thinning rate refers to the proportion of the thickness reduction of the material during the processing, and is usually expressed as the ratio of the difference between the original thickness and the final thickness to the original thickness. Corresponding to the embodiments of the present application, during the flanging forming process, the thinning rates at different positions of the billet model may be different, and the maximum thinning rate refers to the position with the largest thinning rate among all positions.

[0065] It can be understood that during the flanging process, the target area of the billet model deforms under the action of tensile force, resulting in thickness reduction. In the stretching type flanging process, the position of the maximum thinning rate is usually at the edge position (the extension direction of this edge is the length direction of the billet model), that is, the target area may also be an area with a certain edge length.

[0066] Obtaining the target area of the billet model and the position of the maximum thinning rate within the target area may be as follows: By means of simulation, perform stamping and flanging forming simulation on the billet model to obtain the target area of the billet model and the position of the maximum thinning rate. For example: After printing grids or spraying speckles, perform stamping and flanging forming simulation, and after processing by DIC (Digital Image Correlation), obtain the position of the maximum thinning rate.

[0067] It can be understood that the secondary strain vector may refer to the strain along the stretching direction when the target area is subjected to a 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 position of the maximum thinning rate is greater than the parameter values of the secondary strain vectors at other positions. Therefore, if the parameter value of the secondary strain vector at the position of the maximum thinning rate is less than a certain calibration value (such as 0.08, 0.10, etc.), then the parameter values of the secondary strain vectors at other positions within the target area are also less than a certain calibration value.

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

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

[0070] S31. Determine the width adjustment direction of the target area according to the direction of the secondary strain vector, and determine the width adjustment step size of the target area according to the parameter value of the secondary strain vector;

[0071] In some embodiments, the determining the width adjustment direction of the target area according to the direction of the secondary strain vector includes:

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

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

[0074] It can be understood that when the direction of the secondary strain vector is negative, it indicates that the target area has undergone tensile deformation. Therefore, increasing the width of the target area can make the concentrated stress in the target area more dispersed, so as to assist in improving the formability of the billet in the subsequent billet forming process.

[0075] In some embodiments, the determining the width adjustment step size of the target area according to the parameter value of the secondary strain vector includes:

[0076] Determine the width adjustment step corresponding to the parameter value of the secondary strain vector according to a preset corresponding relationship, where when the parameter value of the secondary strain vector is in different parameter ranges, the width adjustment step is different.

[0077] Optionally, determine the width adjustment step corresponding to the parameter value of the secondary strain vector based on the following corresponding relationship:

[0078]

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

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

[0081] S33. Connect the width-adjusted target area with the adjacent area through a smooth curve to obtain the contour of the adjusted target area.

[0082] S4: Determination step: Loop and execute the second acquisition step and the adjustment step until the parameter value of the obtained target secondary strain vector is less than or equal to a preset parameter threshold, then obtain the target contour of the billet model, where 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.

[0083] For ease of understanding, the following is an example:

[0084] For example: First, the initial billet model is as Figure 2 shown. By simulating and analyzing the initial billet model, determine the position of the maximum thinning rate in the tensile strain during the flanging process and the secondary strain vector at that position, ε 21 = -0.153, and determine the length in the tensile strain state, that is, the target area. Among them, the cross-section of the initial billet model after the flanging process is as Figure 3 shown.

[0085] Then, based on the above corresponding relationship, since 0.12 < |ε 21 | = 0.153 < 0.20, the corresponding width adjustment step value is 3 mm. That is, take the length area in the tensile strain state as the target area and extend it outward by 3 mm (the width increases by 3 mm), and connect the two ends of the target area in the length direction with 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, return to execute the second acquisition step, that is, form the billet contour line after the first optimization during the flanging process to obtain the position of the maximum thinning rate and its secondary strain vector of the second simulation result, that is, ε22 = -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, and the step value is 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 maximum thinning rate position 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 maximum thinning rate position 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 billet model passes through the flanging process, 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] It can be understood that after obtaining the target contour of the billet model through CAE (Computer Aided Engineering) testing, in the actual process, the stamping forming equipment can be controlled to stamp and form the target billet according to the target contour of the billet model, so as to obtain the first steel plate. That is to say, the target contour of the billet model can provide data support for the actual stamping forming of the target billet.

[0093] In some embodiments, after controlling the stamping forming equipment to stamp and form the target billet, the method further includes:

[0094] Controlling the trimming equipment to shear and trim the first steel plate to obtain a second steel plate corresponding to the contour of the initial billet model.

[0095] It can be understood that since the initial billet model is a billet model corresponding to the beam-like part, that is, after the billet prepared based on the initial billet model undergoes blanking, pre-forming, and flanging forming (or also including punching), the contour shape required for the beam-like part can be obtained. However, if the target billet adopts the shape corresponding to the initial billet model, problems such as edge fracture may occur in the flanging process, affecting the formability of the product. Therefore, after obtaining the target contour of the billet model through CAE testing in this application, the target billet corresponding to the target contour of the billet model is used for stamping and flanging forming. Thus, due to the increased deformation area of the billet and the uniform deformation in the stretching direction, the problems of excessive thinning or forming cracking caused by stress concentration are eliminated. Subsequently, the redundant edges are sheared through the trimming process, so that a second steel plate corresponding to the beam-like part can still be obtained.

[0096] Exemplarily, the trimming die is used to perform shearing according to the normal direction of the part section, that is, the side trimming process ensures good section quality of the trimming line, cuts off the supplementary surface with increased extension, and the cutting contour line is cut according to the outer contour line of the part product, ensuring that no further trimming is required after this process.

[0097] See Figure 6 , which shows the structural block diagram of the process parameter testing device for billet forming according to the embodiment of the present application.

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

[0099] A first acquisition module 201, configured to execute the first acquisition step: acquire an initial billet model;

[0100] The second acquisition module 202 is configured to perform a second acquisition step: perform a flanging process test on the billet model, and acquire a target area of the billet model and a secondary strain vector at the position of the maximum thinning rate within the target area, where the target area is an area of the billet model in a tensile strain state;

[0101] The adjustment module 203 is configured to perform an adjustment step: adjust the contour of the target area according to the secondary strain vector, and re-perform the second acquisition step after adjusting the contour of the target area;

[0102] The determination module 204 is configured to perform a determination step: repeatedly perform 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 area is transformed into a plane strain state.

[0103] According to a third aspect of the embodiments of the present application, there is provided a computer-readable storage medium storing at least one computer program instruction, and the at least one computer program instruction is loaded and executed by a processor to implement the operations performed by the method according to any one of the first aspect.

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

[0105] The 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 of the above. More specific examples (non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0106] The program code for performing the operations of the present application can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, etc., and also including conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computing device, partially on the user's device, executed as a stand-alone 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 the case of a remote computing device, the remote computing device can be connected to the user's computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., by connecting through the Internet using an Internet service provider).

[0107] According to a fourth aspect of the embodiments of the present application, an electronic device is provided, including one or more processors and one or more memories. At least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method according to any one of the first aspect.

[0108] See Figure 7 , which is a schematic structural diagram of a computer system suitable for use in implementing the electronic device of the embodiments of the present application.

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

[0110] Among them, the storage unit stores program code, and the program code can be executed by the processing unit 410, so that the processing unit 410 executes the steps according to various exemplary embodiments of the present application described in the "Embodiment Method" section of this specification.

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

[0112] The storage unit 420 may further include a program / utility 424 having a set (at least one) of program modules 425. Such program modules 425 include, but are 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 the implementation of a network environment.

[0113] The bus 430 can represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an Accelerated Graphics Port, a processor, or a local bus using any of the various bus structures.

[0114] The electronic device 400 can also communicate with one or more external devices 500 (such as a keyboard, a pointing device, a Bluetooth device, etc.), can also communicate with one or more devices that enable a user to interact with the electronic device 400, and / or can communicate with any device that enables the electronic device 400 to communicate with one or more other computing devices (such as a router, a modem, etc.). Such communication can be carried out through the I / O (Input / Output) interface 450, where the I / O interface 450 can also be connected to the display unit 440 to display the communication content through the display unit 440. Moreover, the electronic device 400 can also communicate with one or more networks (such as a Local Area Network (LAN), a Wide Area Network (WAN), and / or a public network, such as the Internet) through the network adapter 460. As shown in the figure, the network adapter 460 communicates with other modules of the electronic device 400 through the bus 430. It should be understood that although not shown in the figure, other hardware and / or software modules can be used in combination with the 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, etc.

[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 on or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope and spirit of the present 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, hardwiring, or any combination thereof. In addition, each functional unit can be integrated in one processing unit, can exist separately as individual physical units, or two or more units can be integrated in one unit.

[0116] In several embodiments provided by this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0117] The units described as separate components may or may not be physically separated. The components serving as control devices may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0118] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this 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 for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks, or optical discs and other various media that can store program codes.

[0119] The above description is only for the embodiments of this application and is not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A method for testing process parameters of billet forming, characterized in that, Including: The first obtaining step: obtaining an initial billet model; The second obtaining step: performing a flanging process test on the billet model to obtain the target area of the billet model and the secondary strain vector at the position of the maximum thinning rate within the target area, where the target area is the area of the billet model in a tensile strain state; The adjusting step: adjusting the contour of the target area according to the secondary strain vector, and re-executing the second obtaining step after adjusting the contour of the target area; The determining step: repeatedly executing the second obtaining step and the adjusting step until the parameter value of the obtained target secondary strain vector is less than or equal to a preset parameter threshold, and obtaining 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 area is transformed into a plane strain state.

2. The method according to claim 1, wherein The adjusting the contour of the target area according to the secondary strain vector includes: Determining the width adjustment direction of the target area according to the direction of the secondary strain vector, and determining the width adjustment step of the target area according to the parameter value of the secondary strain vector; Adjusting the width of the target area according to the width adjustment direction and the width adjustment step; Connecting the width-adjusted target area to an adjacent area through a smooth curve to obtain the adjusted contour of the target area.

3. The method according to claim 2, characterized in that, The determining the width adjustment direction of the target area according to the direction of the secondary strain vector includes: If the direction of the secondary strain vector is negative, the width adjustment direction of the target area is to increase; If the direction of the secondary strain vector is positive, the width adjustment direction of the target area is to decrease.

4. The method according to claim 2, characterized in that, The determining the width adjustment step of the target area according to the parameter value of the secondary strain vector includes: Determining the width adjustment step corresponding to the parameter value of the secondary strain vector according to a preset corresponding relationship, where the width adjustment step is different when the parameter value of the secondary strain vector is in different parameter ranges.

5. The method according to claim 4, characterized in that Based on the following corresponding relationship, determining the width adjustment step corresponding to the parameter value of the secondary strain vector: Wherein, ε2 represents the secondary strain vector, and f(ε2) represents the width adjustment step.

6. The method according to any one of claims 1-5, characterized in that After obtaining the target contour of the billet model, the method further includes: Controlling a stamping forming device to perform stamping forming on a target billet according to the target contour of the billet model to obtain a first steel plate.

7. The method according to claim 6, wherein After controlling the stamping forming device to perform stamping forming on the target billet, the method further includes: Controlling a trimming device to perform shearing and trimming on the first steel plate to obtain a second steel plate corresponding to the contour of the initial billet model.

8. A process parameter testing device for steel billet forming, characterized in that, Including: The first obtaining module is used to execute the first obtaining step: obtaining an initial billet model; The second obtaining module is used to execute the second obtaining step: performing a flanging process test on the billet model to obtain the target area of the billet model and the secondary strain vector at the position of the maximum thinning rate within the target area, where the target area is the area of the billet model in a tensile strain state; An adjustment module, configured to perform an adjustment step: adjusting the contour of the target area according to the secondary strain vector, and re-performing the second acquisition step after adjusting the contour of the target area; A determination module, configured to perform a determination step: repeatedly performing the second acquisition step and the adjustment step until the parameter value of the obtained target secondary strain vector is less than or equal to a preset parameter threshold, so as to 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 area is transformed into a plane strain state.

9. A computer-readable storage medium, characterized in that, At least one computer program instruction is stored in the computer-readable storage medium, and the at least one computer program instruction is loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1-7.

10. An electronic device, comprising one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method according to any one of 1-7.

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