Automatic modeling method for welding spot connection

Abstract

The invention provides a welding spot connection automatic modeling method. The welding spot connection automatic modeling method comprises the steps that S101, CAD data and a whole vehicle part assembly table of whole vehicle welding spots are obtained; s102, coordinates and welding spot connection information of all the welding spots are obtained from the CAD data of the welding spots, vehicle part information and the assembly relation of parts are extracted from the whole vehicle part assembly table, and a part table and a whole vehicle welding spot assembly relation table based on part numbers are generated; s103, integrating the part table and the assembly relation table to generate an assembly relation information table; step S104, establishing a CAE (Computer Aided Engineering) grid, and preprocessing the CAE grid based on the part table; s105, establishing a model tree of the assembly relation according to the assembly relation table; and S106, importing the assembly relation information table into the CAE grid model, establishing a welding spot model, and enabling the position of each welding spot to be in one-to-one correspondence with the model tree of the assembly relation, so as to solve the problem that the welding spot connection is easy to omit and misconnect in the modeling process, and improve the accuracy and efficiency of modeling.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle computer-aided computing, and more particularly to an automatic modeling method for welding point connection. Background Art

[0002] In vehicle finite element simulation calculations, welds are an important connection method between body-in-white sheet metals, and their finite element modeling workload accounts for 70% to 80% of the entire body-in-white modeling. In order to meet the needs of different finite element solvers, weld modeling must follow specific format requirements. The core task of weld connection modeling is to accurately extract the coordinate information of the welds and the relevant data of the connected parts from the CAD design data, and then convert this connection information into a finite element weld format that meets various simulation calculation requirements.

[0003] Usually, the number of welds in a vehicle is close to tens of thousands, and the relationship between them and their connected assemblies is stored in dozens or even hundreds of CAD data files. Therefore, it is extremely time-consuming to obtain the location information of each weld, confirm the connection relationship of each weld, and finally generate the corresponding weld model. When manually modeling welds, it is difficult to completely avoid problems such as errors and omissions in information. Therefore, it is of great significance for vehicle CAE simulation to develop an automated method that can accurately obtain the location and connection information of welds and can efficiently and accurately complete weld modeling.

[0004] The current modeling process is to manually import the digital model information of the weld, generate point units containing position information, and then manually confirm and extract the assembly connection relationship and weld connection type in the CAD data, and then generate the corresponding weld model based on this. However, in this workflow, due to the dispersion of weld data and the complexity of connection information, the mode of manual confirmation and extraction of information can easily lead to incorrect or missed connections of weld connections. In the subsequent stiffness and collision safety evaluation, the omission of weld connections or incorrect weld connection relationships may lead to a significant decrease in the accuracy of performance evaluation, and even lead to unfavorable optimization directions in the vehicle development stage. In addition, the current technical route involves a large amount of manual repetitive work, which not only reduces the technical utilization rate of developers, but also prolongs the working cycle of vehicle modeling and reduces modeling efficiency. Summary of the invention

[0005] The present invention provides an automated modeling method for solder joint connections, aiming to solve the problem of easy omission and misconnection of solder joint connections during the modeling process, and to improve the accuracy and efficiency of modeling.

[0006] To achieve the above object, the present invention provides a method for automatic modeling of solder joint connections, comprising:

[0007] Step S101: Acquire CAD data of welding points of the whole vehicle and the assembly list of parts of the whole vehicle;

[0008] Step S102: acquiring the coordinates and connection information of all welding points from the CAD data of welding points, extracting the vehicle parts information and the assembly relationship of the parts from the vehicle parts assembly table, generating a parts table according to the vehicle parts information and the assembly relationship of the parts, and generating an assembly relationship table of the vehicle welding points based on the part number according to the coordinates, connection information and assembly relationship of the welding points;

[0009] Step S103: Integrate the above parts table and assembly relationship table to generate an assembly relationship information table, wherein the assembly relationship information table includes welding point coordinates, welding point assembly relationship and part number assembly relationship;

[0010] Step S104: establishing a CAE grid, and preprocessing the CAE grid based on the parts list;

[0011] Step S105: establishing a model tree of assembly relationships according to the assembly relationship table;

[0012] Step S106: Import the assembly relationship information table into the CAE mesh model in step S104 to establish a welding point model. During the welding point model establishment process, the position of each welding point corresponds one-to-one to the model tree of the assembly relationship.

[0013] In one embodiment, before obtaining the CAD data of the welding points of the whole vehicle and the assembly table of the parts of the whole vehicle, a folder for automatic modeling of welding points is established, and the CAD data of welding points and the preprocessing model for CAE software are stored in the folder.

[0014] In one embodiment, obtaining the CAD data of the welding points of the whole vehicle and the assembly list of the parts of the whole vehicle specifically includes:

[0015] Obtain the CAD data of the welding points of the whole vehicle and check the welding point data;

[0016] Acquiring vehicle parts information includes acquiring the part number, part name, part thickness, and part material information of the part.

[0017] In one embodiment, obtaining coordinates and connection information of all welding points from CAD data of welding points specifically includes:

[0018] Opening the CAD data of the solder joints one by one, the solder joint connection information in the CAD data of the solder joints including the part number and part name of the part connected to the solder joint;

[0019] Extract the coordinates of each solder joint in the CAD data, the part number and part name of the part connected to the solder joint, and generate a corresponding .csv file from the CAD data of each solder joint.

[0020] In one embodiment, generating a parts list specifically includes: extracting part numbers, part names, part thicknesses, part materials, and assembly relationships of parts from a vehicle parts assembly list, and generating a parts list in a .csv format;

[0021] Generating an assembly relationship table of welding points of a whole vehicle based on part numbers specifically includes: extracting welding point coordinates, welding point connection information and assembly relationships of parts of the whole vehicle, and generating an assembly relationship table of welding points of the whole vehicle based on part numbers in a .csv format.

[0022] In one embodiment, the CAE software processes the assembly relationship information table, which includes the coordinate position of the welding point, the assembly relationship of the welding point, and the part number under the assembly relationship.

[0023] In one embodiment, in step S104, preprocessing the CAE grid through the parts list specifically includes:

[0024] Check the CAE mesh for quality issues and part penetration issues;

[0025] Complete the PID, MID and PID assignment of the vehicle CAE grid through automated programming, check whether there is any difference between the CAE grid and the information in the generated parts list, and automatically output the difference information if there is any difference;

[0026] By extracting the part thickness information in the parts table, the corresponding thickness information in the CAE grid is checked and errors are automatically corrected.

[0027] In one embodiment, the assembly relationship tree is placed in the PART module of the CAE pre-processing software to check the welding assembly relationship of the entire vehicle.

[0028] In one embodiment, importing the assembly relationship information table into the vehicle CAE model specifically includes:

[0029] Open the CAE pre-processing software and import the vehicle CAE mesh model processed in step S104;

[0030] Importing the assembly relationship information table to establish a solder joint model, and after the solder joint model is established, outputting the solder joint model;

[0031] In the process of generating solder joints, corresponding PID and PART ID are assigned to the solder joints according to the assembly relationship table.

[0032] In one embodiment, when establishing a solder joint model, different generation formats are selected according to different solver formats:

[0033] When you need to model stiffness and strength, choose the rigidly connected weld format;

[0034] When you need to build a collision model, select Use weld point format for collision.

[0035] The present invention has the following beneficial effects:

[0036] 1. High efficiency: This method uses automatic extraction of weld coordinates and connection information to establish a vehicle weld connection model. It does not require manual reading of information one by one, greatly improving the modeling efficiency.

[0037] 2. High accuracy: The present invention processes the CAE grid in the modeling process multiple times by establishing a parts table and an assembly relationship table, thereby preventing data errors in the modeling process and greatly improving the accuracy and intelligence level of modeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of a process of an automatic modeling method for solder joint connection according to an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of a file establishment method for automatic modeling of solder joint connections according to an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of a modeling process of a method for automatically modeling solder joint connections according to an embodiment of the present invention;

[0041] Figure 4 The figure is a schematic diagram of a specific implementation process of a method for automatic modeling of solder joint connections according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] Figure 1 The figure is a flow chart of a method for automatically modeling solder joint connections according to an embodiment of the present invention. The method for automatically modeling solder joint connections includes:

[0044] Step S101: Acquire CAD data of welding points of the whole vehicle and the assembly list of parts of the whole vehicle;

[0045] Step S102: acquiring the coordinates and connection information of all welding points from the CAD data of welding points, extracting the vehicle parts information and the assembly relationship of the parts from the vehicle parts assembly table, generating a parts table according to the vehicle parts information and the assembly relationship of the parts, and generating an assembly relationship table of the vehicle welding points based on the part number according to the coordinates, connection information and assembly relationship of the welding points;

[0046] Step S103: Integrate the above parts table and assembly relationship table to generate an assembly relationship information table, wherein the assembly relationship information table includes welding point coordinates, welding point assembly relationship and part number assembly relationship;

[0047] Step S104: establishing a CAE grid, and preprocessing the CAE grid based on the parts list;

[0048] Step S105: establishing a model tree of assembly relationships according to the assembly relationship table;

[0049] Step S106: Import the assembly relationship information table into the CAE mesh model in step S104 to establish a welding point model. During the welding point model establishment process, the position of each welding point corresponds one-to-one to the model tree of the assembly relationship.

[0050] In one embodiment, before obtaining the CAD data of the welding points of the whole vehicle and the assembly table of the parts of the whole vehicle, a folder for automatic modeling of welding points is established, and the CAD data of welding points and the preprocessing model for CAE software are stored in the folder.

[0051] Exemplarily, the specific steps for creating a folder are as follows: Figure 2 As shown, you can choose to create four folders. The main folder is the general working folder, and you can choose to create three subfolders under its directory, namely CAD data folder, CAE model folder, and Script program folder. This folder creation process is automatically completed by the main program, and its corresponding path can be selected as needed.

[0052] Among them, the CAD data folder stores the data of the whole vehicle's welding points in the CATIA.Part format, the vehicle parts list and other related information.

[0053] "Script" in programming and software development refers to a script file or script program, which contains a series of command sets that control the computer to perform computing operations.

[0054] The CAE model folder stores CAE mesh data and model data after modeling. CAE mesh files can be in the general format of .nas, .inc or .ansa. The specific format can be selected according to the type of modeling environment.

[0055] The Script program folder is the main program file for solder joint automatic modeling. All subsequent intermediate process files and corresponding .csv files will be stored in this folder. Therefore, once this folder is created, the content of this folder cannot be changed before the modeling is completed.

[0056] In one embodiment, obtaining the CAD data of the welding points of the whole vehicle and the assembly list of the parts of the whole vehicle specifically includes:

[0057] Obtain the CAD data of the welding points of the whole vehicle and check the welding point data;

[0058] Acquiring vehicle parts information includes acquiring the part number, part name, part thickness, and part material information of the part.

[0059] Specifically, the CAD data of the solder joints includes the coordinate information of each solder joint in the X, Y, and Z directions, as well as the part number and part name connected to each solder joint.

[0060] The CATIA.PART file of each solder joint assembly contains keywords that can be used to identify each solder joint. This keyword is formulated as a corresponding rule for the main program to pick up.

[0061] The vehicle parts assembly table includes the part number, part name, part thickness and part material information of each part.

[0062] In one embodiment, obtaining coordinates and connection information of all welding points from CAD data of welding points specifically includes:

[0063] Opening the CAD data of the solder joints one by one, the solder joint connection information in the CAD data of the solder joints including the part number and part name of the part connected to the solder joint;

[0064] Extract the coordinates of each solder joint in the CAD data, the part number and part name of the part connected to the solder joint, and generate a corresponding .csv file from the CAD data of each solder joint.

[0065] Specifically, the application system implemented by programming automatically runs the pre-processing software according to the given CAD file path, and opens the files containing the CAD data of the welding points one by one;

[0066] For example, the CAD data of the welding point can be stored in CATIA.Part files. During operation, the CATIA.Part files are opened one by one. CATIA.Part is a basic file type used to store data in CATIA software. It represents the storage format of a part or welding point model in CATIA software.

[0067] Exemplarily, for each CATIA.Part file, the information of the welding spot is retrieved by keywords, and the coordinates of the welding spot and the part number and part name of the part connected by the welding spot are stored in a corresponding .csv format file. Exemplarily, the file can be named connection spotweld.csv.

[0068] For example, the content format of the .csv file is shown in Table 1. The first column ID represents the number of welds, the second, third and fourth columns correspond to the X, Y and Z coordinate positions of the welds, respectively, Num of Parts represents the number of weld connections, P1, P2 and P3 represent the part numbers of the parts connected to the welds, and Connection Type ID represents the weld connection assembly ID.

[0069] Table 1 CAD data generates corresponding .csv format file information table

[0070]

[0071] In one embodiment, generating a parts list specifically includes: extracting part numbers, part names, part thicknesses, part materials, and assembly relationships of parts from a vehicle parts assembly list, and generating a parts list in a .csv format;

[0072] Generating an assembly relationship table of welding points of a whole vehicle based on part numbers specifically includes: extracting welding point coordinates, welding point connection information and assembly relationships of parts of the whole vehicle, and generating an assembly relationship table of welding points of the whole vehicle based on part numbers in a .csv format.

[0073] Exemplarily, by programming, the parts assembly relationship of the corresponding columns can be automatically extracted from the vehicle parts assembly table, and a parts table in .csv format can be generated, and the parts table can be named ZSB.csv.

[0074] In one embodiment, the CAE software processes the assembly relationship information table, which includes the coordinate position of the welding point, the assembly relationship of the welding point, and the part number under the assembly relationship.

[0075] Specifically, the connection spotweld.csv and ZSB.csv in step S102 are automatically integrated through programming.

[0076] Exemplarily, the assembly relationship information table generation specifically includes: combining connection spotweld.csv and ZSB.csv to automatically generate an assembly information table named plinks info.csv or cwelds info.csv. plinks info.csv is applicable to the welding format for collision, and cwelds_info.csv is applicable to the welds of rigid connection. According to the different generated weld formats, files of data formats of different connection types are generated.

[0077] The content of the plinks info.csv file is shown in Table 2, and the format structure of the cwelds info.csv file is similar to this.

[0078] Table 2 Assembly information table in plinks info.csv format

[0079] PID X coordinate Y coordinate Z coordinate P1 P2 P3 8098520 2268.4 682.0 131.1 170100 170000 8098520 2261.7 719.0 130.4 170100 170000 8098525 2627.0 622.2 629.4 170100 170000 171000 8098525 2793.5 517.4 441.5 170100 170000 171000 8021240 467.8 740.7 -37.9 431000 421000

[0080] As shown in Table 2, the PID in the first column represents the PID number of the solder joint assembly, the second, third, and fourth columns represent the X, Y, and Z coordinate positions of the solder joint, respectively, and P1, P2, and P3 represent the PID numbers of the three parts connected by the solder joint, respectively.

[0081] In one embodiment, in step S104, preprocessing the CAE grid through the parts list specifically includes:

[0082] Check the CAE mesh for quality issues and part penetration issues;

[0083] Complete the PID, MID and PID assignment of the vehicle CAE grid through automated programming, check whether there is any difference between the CAE grid and the information in the generated parts list, and automatically output the difference information if there is any difference;

[0084] By extracting the part thickness information in the parts table, the corresponding thickness information in the CAE grid is checked and errors are automatically corrected.

[0085] Specifically, before preparing to run the main program, you need to first check whether the quality of the vehicle CAE mesh meets the collision and stiffness modeling mesh size requirements. If there is penetration between parts, if it does not meet the requirements, corresponding adjustments need to be made.

[0086] Automatically open the established CAE grid through programming, and assign PID, MID and Part ID to the CAE grid of the whole vehicle;

[0087] Through programming, the corresponding part thickness information in the parts table is extracted, the thickness information of the CAE grid is checked, and errors are automatically corrected and error information is returned.

[0088] In one embodiment, the assembly relationship tree is placed in the PART module of the CAE pre-processing software to check the welding assembly relationship of the entire vehicle.

[0089] Specifically, according to the generated assembly relationship table of the whole vehicle welding points, the assembly relationship tree under the Part module is automatically established through programming;

[0090] The assembly relationship tree under the Part module can be used to check the welding assembly relationship of the whole vehicle;

[0091] In the subsequent automatic generation of solder joints, the program can be called to automatically assign the corresponding PID according to the assembly relationship table;

[0092] After completing the above operations, the model is automatically saved.

[0093] In one embodiment, importing the assembly relationship information table into the vehicle CAE model specifically includes:

[0094] Open the CAE pre-processing software and import the vehicle CAE mesh model processed in step S104;

[0095] Importing the assembly relationship information table to establish a solder joint model, and after the solder joint model is established, outputting the solder joint model;

[0096] In the process of generating solder joints, corresponding PID and PART ID are assigned to the solder joints according to the assembly relationship table.

[0097] Exemplarily, the CAE pre-processing software is automatically opened by programming, the CAE mesh model saved after the processing in step S104 is imported, and then the generated plinks info.csv or cwelds info.csv file is imported.

[0098] Figure 4 FIG. 1 is a schematic diagram of a specific implementation process of a method for automatically modeling a weld point connection according to an embodiment of the present invention. The modeling result of the automatic modeling of a weld point connection of a whole vehicle is as follows: Figure 3 As shown in the figure, it can be seen that during the modeling process, the position of the welding points on the whole vehicle model and their connection relationship become clearer and clearer.

[0099] In one embodiment, when establishing a solder joint model, different generation formats are selected according to different solver formats:

[0100] When you need to model stiffness and strength, choose the rigidly connected weld format;

[0101] When you need to build a collision model, select Use weld point format for collision.

[0102] Specifically, if you need to establish a model of stiffness and strength, you can choose CWELD, CHEX, CBAR and other rigid connection weld formats that are suitable for different solver requirements.

[0103] If you need to build a collision model, you can choose to use PLINK, DYNA SPOT WELD and other welding spot formats suitable for different solvers.

[0104] Among them, CWELD, CHEX, and CBAR are commonly used to simulate the rigidity and strength characteristics of welded joints. They are suitable for scenarios where the overall strength, stability, or durability of the structure needs to be evaluated. These formats can capture the behavior of welds when subjected to force, including deformation and stress distribution. In different solvers, these formats may have different implementations and parameter settings.

[0105] PLINK, DYNA SPOT WELD: These are spot weld formats that focus on simulating the behavior of spot welds in a crash event. They are able to simulate the deformation, fracture, or energy absorption of spot welds in high-speed collisions. These formats are often used in scenarios such as vehicle crash simulations and aerospace structural analysis that require evaluating the response of structures under extreme conditions.

[0106] For example, if you want to generate weld modeling suitable for collision, you can select create_plinks in the CAE software, call the assembly relationship information table in the format of plinks info.csv, and automatically generate plink welds for the entire vehicle.

[0107] Plink weld point is a virtual connection point used to simulate the behavior of welded joints in the real world during structural analysis or collision simulation. It simulates the response of welded joints when subjected to force or collision by defining specific properties (such as position, size, strength, etc.) in the simulation software or model.

[0108] If you want to generate weld modeling suitable for stiffness, you can select create_cwelds in the CAE software, call the assembly relationship information table in the format of cwelds_info.csv, and automatically generate the Cweld welds of the entire vehicle.

[0109] Cweld is usually used to simulate spot welding connections. It is a special connection element that can simulate the stiffness and strength of welded joints. By defining Cweld elements, users can more accurately analyze the mechanical properties and responses of welded structures.

[0110] Whether generating weld point modeling for collision or generating weld point modeling for stiffness, the whole process takes 1-2 hours because there are nearly 10,000 weld points in the whole vehicle.

[0111] After the modeling is completed, the white body model of the whole vehicle welding point modeling will be automatically saved in the CAE model folder path.

[0112] The present invention has the following beneficial effects:

[0113] 1. High efficiency: This method uses automatic extraction of weld coordinates and connection information to establish a vehicle weld connection model. It does not require manual reading of information one by one, greatly improving the modeling efficiency.

[0114] 2. High accuracy: The present invention processes the CAE grid in the modeling process multiple times by establishing a parts table and an assembly relationship table, thereby preventing data errors in the modeling process and greatly improving the accuracy and intelligence level of modeling.

[0115] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0116] It should be noted that, in the present application, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. It should also be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0117] The above embodiments are provided for persons familiar with the art to implement or use the present application. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the application concept of the present application. Therefore, the protection scope of the present application is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A method for automatic modeling of solder joint connections, characterized in that: The solder joint connection automatic modeling method comprises: Step S101: Acquire CAD data of welding points of the whole vehicle and the assembly list of parts of the whole vehicle; Step S102: acquiring the coordinates and connection information of all welding points from the CAD data of welding points, extracting the vehicle parts information and the assembly relationship of the parts from the vehicle parts assembly table, generating a parts table according to the vehicle parts information and the assembly relationship of the parts, and generating an assembly relationship table of the vehicle welding points based on the part number according to the coordinates, connection information and assembly relationship of the welding points; Step S103: Integrate the above parts table and assembly relationship table to generate an assembly relationship information table, wherein the assembly relationship information table includes welding point coordinates, welding point assembly relationship and part number assembly relationship; Step S104: establishing a CAE grid, and preprocessing the CAE grid based on the parts list; Step S105: establishing a model tree of assembly relationships according to the assembly relationship table; Step S106: Import the assembly relationship information table into the CAE mesh model in step S104 to establish a welding point model. During the welding point model establishment process, the position of each welding point corresponds one-to-one to the model tree of the assembly relationship.

2. The method for automatic modeling of solder joint connection according to claim 1, characterized in that: Before obtaining the CAD data of the welding points of the whole vehicle and the assembly table of the parts of the whole vehicle, a folder for automatic modeling of welding points is established, and the CAD data of welding points and the preprocessing model for CAE software are stored in the folder.

3. The method for automatic modeling of solder joint connection according to claim 1, characterized in that: Obtaining the CAD data of the vehicle's welding points and the vehicle's parts assembly table specifically includes: Obtain the CAD data of the welding points of the whole vehicle and check the welding point data; Acquiring vehicle parts information includes acquiring the part number, part name, part thickness, and part material information of the part.

4. The method for automatic modeling of solder joint connection according to claim 3, characterized in that: Obtaining the coordinates and connection information of all solder joints from the CAD data of solder joints specifically includes: Opening the CAD data of the solder joints one by one, the solder joint connection information in the CAD data of the solder joints including the part number and part name of the part connected to the solder joint; Extract the coordinates of each solder joint in the CAD data, the part number and part name of the part connected to the solder joint, and generate a corresponding .csv file from the CAD data of each solder joint.

5. The method for automatic modeling of solder joint connection according to claim 4, characterized in that: Generating a parts list specifically includes: extracting the part number, part name, part thickness, part material and part assembly relationship of the parts from the vehicle parts assembly table, and generating a parts list in .csv format; Generating an assembly relationship table of welding points of a whole vehicle based on part numbers specifically includes: extracting welding point coordinates, welding point connection information and assembly relationships of parts of the whole vehicle, and generating an assembly relationship table of welding points of the whole vehicle based on part numbers in a .csv format.

6. The method for automatic modeling of solder joint connection according to claim 1, characterized in that: The CAE software processes the assembly relationship information table, which includes the coordinate positions of the welding points, the assembly relationships of the welding points, and the part numbers under the assembly relationships.

7. The method for automatic modeling of solder joint connection according to claim 5, characterized in that: In step S104, preprocessing the CAE grid in the parts list specifically includes: Check the CAE mesh for quality issues and part penetration issues; Complete the PID, MID and PID assignment of the vehicle CAE grid through automated programming, check whether there is any difference between the CAE grid and the information in the generated parts list, and automatically output the difference information if there is any difference; By extracting the part thickness information in the parts table, the corresponding thickness information in the CAE grid is checked and errors are automatically corrected.

8. The method for automatic modeling of solder joint connection according to claim 1, characterized in that: The assembly relationship tree is placed in the PART module of the CAE pre-processing software to check the welding assembly relationship of the whole vehicle.

9. The method for automatic modeling of solder joint connection according to claim 1, characterized in that: Importing the assembly relationship information table into the vehicle CAE model specifically includes: Open the CAE pre-processing software and import the vehicle CAE mesh model processed in step S104; Importing the assembly relationship information table to establish a solder joint model, and after the solder joint model is established, outputting the solder joint model; In the process of generating solder joints, corresponding PID and PART ID are assigned to the solder joints according to the assembly relationship table.

10. The method for automatic modeling of solder joint connection according to claim 1, characterized in that: When establishing a solder joint model, select different generation formats according to the different solver formats: When you need to model stiffness and strength, choose the rigidly connected weld format; When you need to build a collision model, select Use weld point format for collision.

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