Stamping feasibility checking method, system and equipment for passenger car A column modeling

Abstract

The invention relates to the technical field of automobiles, and discloses a stamping feasibility checking method, system and equipment for a passenger car A-pillar modeling, and the method comprises the steps: selecting any passenger car A-pillar which is located on the left and right sides of a front windshield window of a car and of which the two sides extend backwards as a target modeling object; modeling information of the target modeling object is collected, a stamping die matched with the modeling information of the target modeling object is obtained from a predefined modeling database, a movement gap between the part and the die and a die strength check value are determined, and the minimum modeling opening size of the target modeling object is calculated; judging whether the target modeling object meets a stamping process constraint condition or not by comparing the actual measurement size with the minimum modeling opening size, and obtaining a stamping feasibility verification result; wherein the stamping process constraint condition is that the actually measured modeling opening size of the target modeling object is not smaller than the minimum modeling opening size. According to the scheme, stamping feasibility judgment of the automobile parts can be simply, conveniently and efficiently achieved, and a basis is provided for technicians.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and specifically provides a stamping feasibility checking method, system, and device for the styling of the A-pillar of a passenger car. Background Art

[0002] Competition in the automotive industry is becoming increasingly fierce, and consumers' demands for automobiles are constantly rising. It is required that automotive products not only have excellent performance but also meet the requirements of comfort and aesthetics in terms of design. During the automotive design process, as one of the important structural components of the vehicle body, the styling design of the A-pillar directly affects the overall appearance of the vehicle and the field of vision of the occupants. Therefore, the rationality of the A-pillar styling design is crucial.

[0003] Currently, during the A-pillar styling process, designers mainly rely on experience and repeated tests to determine whether the A-pillar styling meets the process requirements; this method is inefficient and it is difficult to ensure the accuracy of the design. At the same time, since the A-pillar styling design involves multiple parameters, how to effectively consider these parameters comprehensively and conduct a stamping feasibility analysis of the A-pillar styling is also an urgent problem to be solved.

[0004] In order to improve the efficiency and accuracy of the A-pillar styling, a system and method are needed to conduct a stamping feasibility analysis and checking of the A-pillar styling, so as to ensure that the A-pillar styling meets the process requirements, avoid potential problems at the design stage, and reduce late rework and cost waste. Summary of the Invention

[0005] The purpose of the present invention is to provide a stamping feasibility checking method, system, and electronic device for the styling of the A-pillar of a passenger car, which makes up for the problems in the prior art that it is unable to effectively consider multiple parameters involved in the A-pillar styling comprehensively and lacks a systematic method for conducting a stamping feasibility analysis of the A-pillar styling.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] In a first aspect, the present application provides a stamping feasibility checking method for the styling of the A-pillar of a passenger car, and the method includes:

[0008] Select any A-pillar of a passenger car located on the left and right of the vehicle's front windshield and extending backward on both sides as the target styling object;

[0009] Collect the styling information of the target styling object, and obtain the stamping die that matches the styling information of the target styling object from a pre-defined styling database;

[0010] Based on the stamping strength and structural dimensions of the stamping die, determine the movement clearance between the part and the die and the die strength checking value, and calculate the minimum styling opening size of the target styling object;

[0011] By comparing the minimum styling opening size with the actually measured styling opening size, it is determined whether the target styling object meets the stamping process constraint conditions, and the stamping feasibility verification result of the target styling object is obtained; wherein, the stamping process constraint condition is that the actually measured styling opening size of the target styling object is not less than the minimum styling opening size.

[0012] Optionally, the collecting the styling information of the target styling object includes:

[0013] Define the cross-section of the target styling object as the styling area;

[0014] Based on the instruction of the user acting on the styling area, select the center of the vehicle body length as the origin of the polar coordinate system and establish a polar coordinate system;

[0015] Under the polar coordinate system, based on the first position information and the second position information of each stamping direction in the transverse and longitudinal axis directions of the vehicle body, determine the styling information of the target styling object; wherein, the first position information is the height of the upper part of the styling from the front windshield installation surface, and the included angle between the upper flange of the styling and the Z direction of the vehicle body; the second position information is the included angle between the upper flange of the front door side and the Z direction of the vehicle body.

[0016] Optionally, the pre-defined styling database includes: storing the styling information of the A-pillar of passenger cars of one or more vehicle models, as well as the stamping strength and structural dimensions of the stamping dies required for styling in each stamping process.

[0017] Optionally, the determining the movement clearance between the part and the die and the die strength check value based on the stamping strength and structural dimensions of the stamping die includes:

[0018] Construct a calculation model based on the styling information of the target styling object and perform stamping simulation;

[0019] Define the number of iterations and the range of optimization variables to generate an initial population; use the styling parameters generated by the initial population as the input of the calculation model, and define the optimization items and range of stamping based on the stamping process parameters output by the calculation model;

[0020] Based on the multi-objective genetic algorithm, generate an initial population, determine the number of population individuals according to the actual situation, as well as the number of stamping process parameters to be optimized, the number of iterations, the mutation probability, and the crossover probability, and obtain the fitness value of styling stamping;

[0021] Based on the multi-objective genetic optimization algorithm, select the individuals in the sub-populations with higher fitness in each sub-population to form a new sub-population; iteratively calculate the styling stamping fitness of each sub-population that meets the stamping die structure and update the stamping process parameters of the previous generation; when the preset termination condition is met, obtain the optimal stamping process parameters;

[0022] Based on the optimal stamping process parameters, the sum of the clearance between the part and the die and the internal clearance of the die is used as the moving clearance between the part and the die.

[0023] When the angles between the upper flanging of the shape and the upper flanging of the front door side and the Z-direction of the vehicle body are equal, the minimum strength value required by the stamping die structure is defined as the stamping die strength verification value.

[0024] Optionally, the iterative calculation satisfies the stamping fitness of each sub-group of the stamping die structure, and updates the stamping process parameters of the previous generation; when the preset termination condition is met, obtaining the optimal stamping process parameters includes:

[0025] According to different stamping die strengths and structural dimensions, different weights are selected to adjust the optimization results of the stamping process parameters.

[0026] Write the stamping process parameters generated by the initial population into the calculation model, perform simulation by running the calculation model through the code, and read out the simulation results through the API. Based on the stamping process fitness, iteratively calculate the fitness value of each generation of shape optimization.

[0027] When the preset number of iterations is reached, sort the fitness values of each generation obtained by calculation in descending order, and select the stamping process parameters with the highest priority as the optimal stamping process parameters for this optimization.

[0028] Optionally, the minimum shape opening size of the target shape object is calculated by the following formula:

[0029] L min =(e / cosα + h)*sin(β - α)+k

[0030] In the formula, L min represents the minimum shape opening size, α represents the angle between the upper flanging of the shape and the Z-direction of the vehicle body; β represents

[0031] the angle between the upper flanging of the front door side and the Z-direction of the vehicle body; h represents the height of the upper part of the shape from the front windshield mounting surface; L represents the shape opening size, e is the moving clearance between the part and the die; k is the stamping die strength verification value.

[0032] Optionally, after obtaining the stamping feasibility evaluation result of the target shape object, it further includes: when the stamping feasibility evaluation result of the target shape object does not meet the stamping process constraint conditions, adjust the shape opening size of the target shape until the actually measured shape opening size is not less than the minimum shape opening size;

[0033] When the stamping feasibility evaluation result of the target shape object meets the stamping process constraint conditions, combined with the influencing factors of the A-pillar shape stamping, define the elements and weights of the stamping feasibility evaluation index, and comprehensively evaluate the stamping feasibility of the A-pillar shape.

[0034] Optionally, the comprehensive evaluation value for comprehensively evaluating the stamping feasibility is calculated by the following formula:

[0035]

[0036] In the formula, D i represents the comprehensive evaluation value for comprehensively evaluating the stamping feasibility, n is the element that does not meet the stamping feasibility evaluation index, and γ l is the weight of the element that does not meet the stamping feasibility evaluation index.

[0037] In a second aspect, the present application also provides a stamping feasibility checking system for the styling of a passenger car A-pillar. The system includes:

[0038] A definition module for selecting any passenger car A-pillar located on the left and right of the vehicle front windshield and extending backward on both sides as the target styling object;

[0039] An acquisition module for collecting the styling information of the target styling object and obtaining a stamping die that matches the styling information of the target styling object from a pre-defined styling database;

[0040] A calculation module for determining the movement clearance between the part and the die and the die strength check value based on the stamping strength and structural dimensions of the stamping die, and calculating the minimum styling opening size of the target styling object;

[0041] A comparison and verification module for determining whether the target styling object meets the stamping process constraint conditions by comparing the minimum styling opening size with the actually measured styling opening size, and obtaining the stamping feasibility verification result of the target styling object; wherein, the stamping process constraint condition is that the actually measured styling opening size of the target styling object is not less than the minimum styling opening size.

[0042] In a third aspect, the present application provides a computer device. The computer device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the method described in any item of the first aspect are implemented.

[0043] The beneficial effects of the present invention are embodied in:

[0044] A stamping feasibility verification method, system and equipment for the A-pillar styling of a passenger vehicle provided above. First, select any A-pillar of a passenger vehicle located on the left and right of the front windshield of the vehicle and extending backward on both sides as the target styling object; collect the styling information of the target styling object, and obtain the stamping die that matches the styling information of the target styling object from a pre-defined styling database. Secondly, based on the stamping strength and structural dimensions of the stamping die, determine the movement clearance between the part and the die and the die strength verification value, and calculate the minimum styling opening size of the target styling object. Finally, by comparing the minimum styling opening size with the actually measured styling opening size, determine whether the target styling object meets the stamping process constraint conditions, and obtain the stamping feasibility verification result of the target styling object; wherein, the stamping process constraint condition is that the actually measured styling opening size of the target styling object is not less than the minimum styling opening size. The above solution starts from the dimension information of the A-pillar styling, automatically calculates the minimum opening size of the styling through the input of measured values, and judges whether the styling meets the process requirements by comparing the actually measured opening size with the calculated minimum opening size, making the feasibility judgment simple and efficient; improves the efficiency and accuracy of A-pillar styling stamping, and avoids the inefficient method of relying on experience and repeated tests.

[0045] A stamping feasibility verification method, system and equipment for the A-pillar styling of a passenger vehicle provided above simplifies the complex die structure dimensions and movement relationship dimensions through simple calculations, and substitutes relevant dimensions using styling information through trigonometric functions, enabling non-professional stamping technicians to also complete the stamping feasibility judgment of the A-pillar styling; can discover and avoid potential problems of the A-pillar styling in the early stage of design, reduce late rework and cost waste, better meet the requirements of project development, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0047] Figure 1 It is a flowchart of a stamping feasibility verification method for the A-pillar styling of a passenger vehicle provided by the present invention;

[0048] Figure 2 It is a schematic structural diagram of a stamping process verification system for the A-pillar styling of a passenger vehicle provided by the present invention;

[0049] Figure 3 It is a cross-sectional view of the A-pillar front windshield position provided by the present invention;

[0050] Figure 4Schematic diagram of measuring the opening size of the A-pillar styling provided by the present invention;

[0051] Figure 5 Schematic diagram of the structure of a computer device provided by the present invention. Detailed implementation manners

[0052] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] At present, the related prior art of this technology mainly relies on experience and repeated experiments to determine whether the A-pillar styling meets the process requirements, with low efficiency and difficult to ensure the accuracy of the design. Therefore, it is impossible to effectively consider multiple parameters involved in the A-pillar styling design, lacking a systematic method for analyzing the stamping feasibility of the A-pillar styling. It is impossible to avoid potential problems of the A-pillar styling at the design stage, resulting in rework and cost waste in the later stage. It is impossible to conduct a more in-depth analysis of the data, dig and analyze the areas for improvement more precisely, and it is difficult to accurately reflect the real needs of users for the A-pillar styling design, affecting the design efficiency.

[0054] In order to overcome the shortcomings existing in the prior art, a stamping feasibility checking method, system and device for a passenger car A-pillar styling provided by an embodiment of the present application are mainly applied to in-vehicle devices. The method can be applied to a terminal, a server, or a vehicle system including a terminal and a server, and is implemented through the interaction between the terminal and the server. Among them, the terminal can be but is not limited to various personal computers, laptop computers, smart phones, tablet computers, etc.

[0055] The following embodiments take the vehicle side as an example and elaborate in detail on the design process of the method. Through the method proposed by the embodiments of the present invention, the checking of the stamping process feasibility analysis of the passenger car A-pillar in styling is realized.

[0056] In one embodiment, as Figure 1 shown, a stamping feasibility checking method for a passenger car A-pillar styling provided by an embodiment of the present invention, the method includes:

[0057] S1 Select any passenger car A-pillar located on the left and right of the vehicle front windshield and extending backward on both sides as the target styling object;

[0058] S2 Collect the styling information of the target styling object, and obtain the stamping die that matches the styling information of the target styling object from a pre-defined styling database;

[0059] S3 determines the movement clearance between the part and the die and the die strength check value based on the stamping strength and structural dimensions of the stamping die, and calculates the minimum modeling opening size of the target modeling object;

[0060] S4 determines whether the target modeling object meets the stamping process constraint conditions by comparing the minimum modeling opening size with the actually measured modeling opening size, and obtains the stamping feasibility verification result of the target modeling object; wherein, the stamping process constraint condition is that the actually measured modeling opening size of the target modeling object is not less than the minimum modeling opening size.

[0061] In the above embodiment, the collecting the modeling information of the target modeling object in step S1 includes:

[0062] Defining the cross-section of the target modeling object as the modeling area;

[0063] Based on the instruction of the user acting on the modeling area, selecting the center of the vehicle body length as the origin of the polar coordinate system and establishing a polar coordinate system;

[0064] In the polar coordinate system, based on the first position information and the second position information of each stamping direction and the crosswise and longitudinal axis directions of the vehicle body, that is, the Z direction and the Y direction, determine the modeling information of the target modeling object; wherein, the first position information is the height of the upper part of the modeling from the front windshield installation surface, and the included angle between the upper flange of the modeling and the Z direction of the vehicle body; the second position information is the included angle between the upper flange of the front door side and the Z direction of the vehicle body.

[0065] Specifically, as Figure 2 shown in the cross-section of the A-pillar front windshield position: Measure the values of α, β, h, and L. The measured values of α, β, h, and L can be input into the computer-aided design software; the A-pillar modeling information is displayed in the computer-aided design software. Wherein: α is the angle (°) between the upper flange of the modeling and the Z direction of the vehicle body; β is the angle (mm) between the upper flange of the front door hole of the modeling and the Z direction of the vehicle body; h is the height (mm) of the upper part of the modeling from the front windshield installation surface; L is the modeling opening size (mm).

[0066] In the above embodiment step S2, the pre-defined modeling database includes: storing the A-pillar modeling information of one or more vehicle models of passenger cars, and the stamping strength and structural dimensions of the stamping die required for modeling in each stamping process.

[0067] In the above embodiment step S3, determining the movement clearance between the part and the die and the die strength check value based on the stamping strength and structural dimensions of the stamping die includes:

[0068] Constructing a calculation model based on the modeling information of the target modeling object and performing stamping simulation;

[0069] Define the number of iterations and the range of optimization variables to generate an initial population; use the modeling parameters generated by the initial population as the input of the calculation model, and define the optimization items and range of stamping based on the stamping process parameters output by the calculation model;

[0070] Based on the multi-objective genetic algorithm, generate an initial population, determine the number of population individuals, the number of stamping process parameters to be optimized, the number of iterations, the mutation probability, and the crossover probability according to the actual situation, and obtain the fitness value of profiling stamping;

[0071] Based on the multi-objective genetic optimization algorithm, select the individuals in the sub-populations with higher fitness in each sub-population to form a new sub-population; iteratively calculate the profiling stamping fitness of each sub-population that meets the stamping die structure, and update the stamping process parameters of the previous generation; when the preset termination condition is met, obtain the optimal stamping process parameters;

[0072] Based on the optimal stamping process parameters, take the sum of the part-die clearance and the internal die clearance as the part-die movement clearance;

[0073] When the angles between the upper flanging of the profile and the upper flanging of the front door side and the vehicle body in the Z direction are equal, define the minimum strength value required by the stamping die structure as the stamping die strength check value.

[0074] In the above embodiments, iteratively calculating the profiling stamping fitness of each sub-population that meets the stamping die structure and updating the stamping process parameters of the previous generation; when the preset termination condition is met, obtaining the optimal stamping process parameters includes:

[0075] According to different stamping die strengths and structural dimensions, select different weights to adjust the optimization results of stamping process parameters;

[0076] Write the stamping process parameters generated by the initial population into the calculation model, run the calculation model through code for simulation, and read out the simulation results through the API. Based on the stamping process fitness, iteratively calculate the fitness value of each generation of profiling optimization;

[0077] When the preset number of iterations is reached, sort the calculated fitness values of each generation in descending order, and select the stamping process parameters with the highest priority as the optimal stamping process parameters for this optimization.

[0078] In step S3, for the calculation of the minimum opening size, the value of L can be automatically calculated from the data α, β, and h at the corresponding positions in the EXCEL table. min Specifically, calculate the minimum profiling opening size of the target profiling object through the following formula:

[0079] L min =(e / cosα + h)*sin(β - α)+k

[0080] In the formula, L min represents the minimum styling opening size, α represents the angle between the upper flange of the styling and the Z direction of the vehicle body; β represents the angle between the upper flange on the front door side and the Z direction of the vehicle body; h represents the height from the upper part of the styling to the installation surface of the front windshield; L represents the styling opening size, e is the movement clearance between the part and the die; k is the strength check value of the stamping die.

[0081] Specifically, let e = 5, k = 35, and the minimum styling opening size L min The calculation formula for L min =(5 / cosα + h)*sin(β - α)+35, where the values 5 and 35 in the formula are the movement clearance between the part and the die and the die strength check value. This formula simplifies the complex die structure dimensions and movement relationship dimensions, and uses the basic styling information through trigonometric functions to substitute relevant dimensions; enabling non-professional stamping technicians to calculate the minimum opening size L min =(5 / cosα + h)*sin(β - α)+35 to calculate the minimum opening size L min , and quickly and effectively complete the stamping feasibility judgment of the A-pillar styling.

[0082] For example Figure 3 As shown, taking the analysis of a certain vehicle model as an example, the measured values are α = 20°, β = 51°, h = 22. After calculation, L min =49.07mm, and the measured opening size L = 49.13mm; starting from the dimension information angle of the A styling, through the input of measured values, the present invention automatically calculates the minimum styling opening size, and judges whether the styling meets the process requirements by comparing the measured opening size with the calculated minimum opening size, making the stamping feasibility judgment simple and efficient.

[0083] In the above-mentioned step S4 of the embodiment, the basis for determining that the styling meets the process requirements is that the measured data L ≥ the calculated L min ; otherwise, it is determined that the process requirements are not met.

[0084] In addition, in the above-mentioned step S4 of the embodiment, after obtaining the stamping feasibility evaluation result of the target styling object, it further includes: when the stamping feasibility evaluation result of the target styling object does not meet the stamping process constraint conditions, adjusting the styling opening size of the target styling until the actually measured styling opening size is not less than the minimum styling opening size;

[0085] When the stamping feasibility evaluation result of the target styling object meets the stamping process constraint conditions, combining the influencing factors of the A-pillar styling stamping, defining the elements and their weights of the stamping feasibility evaluation index, and comprehensively evaluating the stamping feasibility of the A-pillar styling.

[0086] Specifically, the comprehensive evaluation value for comprehensively evaluating the stamping feasibility is calculated by the following formula:

[0087]

[0088] In the formula, D i represents the comprehensive evaluation value for comprehensively evaluating the stamping feasibility, n is the element that does not meet the stamping feasibility evaluation index, and γ l is the weight of the element that does not meet the stamping feasibility evaluation index.

[0089] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the indication of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0090] Based on the above specific implementation, the present application provides the following embodiments.

[0091] Embodiment 1: The embodiment of the present invention provides a method for checking the stamping feasibility of the A-pillar styling of a passenger car, including the following steps:

[0092] Step 11: Obtain the A-pillar styling information of the target vehicle model.

[0093] Step 101: Measure the angle α between the upper flanging of the A-pillar styling and the vehicle body in the Z direction, the angle β between the upper flanging of the front door opening of the styling and the vehicle body in the Z direction, the height h from the upper part of the styling to the front windshield mounting surface, and the styling opening size L. Among them, the value range of α is 0° to 45°, and α = 20° is taken in this embodiment; the value range of β is 45° to 80°, and β = 45° is taken in this embodiment; the value range of h is 10 mm to 35 mm, and h = 20 mm is taken in this embodiment; the value range of L is 30 mm to 70 mm, and L = 45 mm is taken in this embodiment.

[0094] Step 102: Input the measured values of α = 20°, β = 45°, h = 20 mm, and L = 45 mm into the computer-aided design software.

[0095] Step 103: Display the basic information of the A-pillar styling in the computer-aided design software.

[0096] Step 12: Calculate the minimum opening size.

[0097] Step 201. Calculate the minimum opening size L according to the formula L min =(5 / cosα + h)*sin(β - α)+35, where the values 5 and 35 in the formula are the movement clearances between parts and dies and the die strength check values. Substitute α = 20°, β = 45°, and h = 20 mm into the formula to calculate L min = 38 mm. min =38mm。

[0098] Step 202. Input the calculated value of L min = 38 mm into the computer-aided design software.

[0099] Step 13. Judge the relationship between the actual opening size L = 45 mm of the styling and the minimum opening size L min = 38 mm. Since L > L min , step 14 is executed.

[0100] Step 14. Confirm that the A-pillar styling meets the stamping process constraints.

[0101] Step 401. Feed back the information that the A-pillar styling meets the stamping process constraints to the designers for subsequent design work.

[0102] Example 2: The embodiment of the present invention provides a method for checking the stamping feasibility of a passenger car A-pillar styling, including the following steps:

[0103] Step 11. Confirm the A-pillar styling information of a certain vehicle model.

[0104] Step 101. Measure the angle α between the upper flange of the A-pillar styling and the vehicle body in the Z direction, the angle β between the upper flange of the front door opening of the styling and the vehicle body in the Z direction, the height h of the upper part of the styling from the front windshield mounting surface, and the opening size L of the styling. Among them, the value range of α is 0° to 45°, and α = 25° is taken in this embodiment; the value range of β is 45° to 80°, and β = 50° is taken in this embodiment; the value range of h is 10 mm to 35 mm, and h = 25 mm is taken in this embodiment; the value range of L is 30 mm to 70 mm, and L = 50 mm is taken in this embodiment.

[0105] Step 102. Input the measured values of α = 25°, β = 50°, h = 25 mm, and L = 50 mm into the computer-aided design software.

[0106] Step 103. Display the A-pillar styling information in the computer-aided design software.

[0107] Step 12. Calculate the minimum opening size.

[0108] Step 201. According to the formula Lmin =(5 / cosα + h) * sin(β - α) + 35 to calculate the minimum opening size L min , where the values 5 and 35 in the formula are the clearance between the part and the die movement and the die strength check value. Substitute α = 25°, β = 50°, and h = 25 mm into the formula to calculate L min = 42 mm.

[0109] Step 202. Input the calculated value of L min = 42 mm into the computer-aided design software.

[0110] Step 13. Judge the relationship between the actual opening size L = 50 mm of the styling and the minimum opening size L min = 42 mm. Since L > L min , execute Step 14.

[0111] Step 14. Confirm that the A-pillar styling meets the stamping process requirements.

[0112] Step 401. Feed back the information that the A-pillar styling meets the stamping process requirements to the designers for subsequent design work.

[0113] Embodiment 3: The embodiment of the present invention also provides a method for analyzing and checking the stamping feasibility of a passenger car A-pillar styling, including the following steps:

[0114] Step 11. Confirm the A-pillar styling information of the new vehicle model.

[0115] Step 101. Measure the angle α between the upper flange of the A-pillar styling and the vehicle body in the Z direction, the angle β between the upper flange of the front door opening of the styling and the vehicle body in the Z direction, the height h of the upper part of the styling from the front windshield installation surface, and the opening size L of the styling. Among them, the value range of α is 0° to 45°, and α = 18° is taken in this embodiment; the value range of β is 45° to 80°, and β = 30° is taken in this embodiment; the value range of h is 10 mm to 35 mm, and h = 18 mm is taken in this embodiment; the value range of L is 30 mm to 70 mm, and L = 400 mm is taken in this embodiment.

[0116] Step 102. Input the measured values of α = 18°, β = 30°, h = 18 mm, and L = 40 mm into the computer-aided design software.

[0117] Step 103. Display the basic information of the A-pillar styling in the computer-aided design software.

[0118] Step 12. Calculate the minimum opening size.

[0119] Step 201. According to the formula L min=(5 / cosα + h) * sin(β - α) + 35 to calculate the minimum opening size L min , where the numerical values 5 and 35 in the formula are the movement clearances between parts and dies and the die strength verification values.

[0120] Substitute α = 18°, β = 30°, and h = 18 mm into the formula to calculate L min = 35 mm.

[0121] Step 202. Input the calculated value of L min = 35 mm into the computer-aided design software.

[0122] Step 13. Judge the relationship between the actual opening size L = 40 mm of the styling and the minimum opening size L min = 35 mm. Since L > L min , thus execute Step 14.

[0123] Step 14. Confirm that the A-pillar styling meets the stamping process constraints.

[0124] Step 401. Feed back the information that the A-pillar styling meets the stamping process constraints to the designers for subsequent design work.

[0125] Based on the same inventive concept, the embodiment of the present application also provides a stamping feasibility verification system for a passenger car A-pillar styling for implementing the stamping feasibility verification method of the passenger car A-pillar styling involved above. The implementation solutions provided by this system to solve problems are similar to the implementation solutions recorded in the above method. Therefore, for the specific limitations in one or more embodiments of the stamping feasibility verification system of the passenger car A-pillar styling provided below, reference can be made to the limitations on the stamping feasibility verification method of the passenger car A-pillar styling in the above text, which will not be repeated here.

[0126] In one embodiment, as Figure 4 shown, a stamping feasibility verification system for a passenger car A-pillar styling is provided, including: a definition module 210, an acquisition module 220, a calculation module 230, and a comparison and verification module 240, where:

[0127] The definition module 210 is used to select any passenger car A-pillar located on the left and right of the vehicle front windshield and extending backward on both sides as the target styling object;

[0128] The acquisition module 220 is used to collect the styling information of the target styling object and obtain the stamping die that matches the styling information of the target styling object from the pre-defined styling database;

[0129] A calculation module 230, configured to determine a movement gap between a part and a die and a die strength check value based on the stamping strength and structural dimensions of a stamping die, and calculate a minimum modeling opening size of a target modeling object;

[0130] A comparison and verification module 240, configured to determine whether the target modeling object meets the stamping process constraint conditions by comparing the minimum modeling opening size with the actually measured modeling opening size, and obtain a stamping feasibility verification result of the target modeling object; wherein, the stamping process constraint condition is that the actually measured modeling opening size of the target modeling object is not less than the minimum modeling opening size.

[0131] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structural diagram may be as Figure 5 shown. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for checking the stamping feasibility of a passenger car A-pillar styling.

[0132] Those skilled in the art can understand that Figure 5 the structure shown in

[0133] is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. Specifically, the computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0134] It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0134] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as a limitation on the patent scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A stamping feasibility verification method for passenger car A-pillar molding, characterized in that: The method comprises: Select any A-pillar of a passenger car located on the left and right sides of the front windshield of the vehicle and extending backward on both sides as the target modeling object; Collecting modeling information of a target modeling object, and obtaining a stamping die matching the modeling information of the target modeling object from a predefined modeling database; Based on the stamping strength and structural dimensions of the stamping die, determine the movement clearance between the part and the die and the die strength verification value, and calculate the minimum modeling opening size of the target modeling object; By comparing the minimum modeling opening size with the actually measured modeling opening size, it is determined whether the target modeling object meets the stamping process constraint conditions, and a stamping feasibility verification result of the target modeling object is obtained; wherein, the stamping process constraint condition is that the actually measured modeling opening size of the target modeling object is not less than the minimum modeling opening size.

2. The method according to claim 1, characterized in that The modeling information of the target modeling object to be collected includes: The cross section of the target modeling object is defined as a modeling region; Based on the user's instruction acting on the styling area, the length center of the vehicle body is selected as the polar coordinate origin to establish a polar coordinate system; In the polar coordinate system, the styling information of the target styling object is determined based on the first position information and the second position information in each stamping direction and the transverse and longitudinal axis directions of the vehicle body; wherein the first position information is the height of the upper part of the styling from the front windshield mounting surface, and the angle between the upper flange of the styling and the Z direction of the vehicle body; the second position information is the angle between the upper flange on the front door side and the Z direction of the vehicle body.

3. The method according to claim 1, characterized in that The predefined modeling database includes: storing the modeling information of the A-pillar of one or more models of passenger cars, and the stamping strength and structural dimensions of the parts of the stamping dies required for the modeling in each stamping process.

4. The method according to claim 1, characterized in that The determination of the movement clearance between the part and the die and the die strength verification value based on the stamping strength and structural dimensions of the stamping die includes: Build a calculation model based on the modeling information of the target modeling object to perform stamping simulation; The number of iterations and the range of optimization variables are defined to generate an initial population; the modeling parameters generated by the initial population are used as inputs of a calculation model, and based on the stamping process parameters output by the calculation model, the optimization items and ranges of stamping are defined; Based on the multi-objective genetic algorithm, the initial population is generated, and the number of individuals in the population, the number of stamping process parameters to be optimized, the number of iterations, the mutation probability, and the crossover probability are determined according to the actual situation to obtain the fitness value of the modeling stamping; Based on the multi-objective genetic optimization algorithm, individuals with higher fitness are selected from each sub-group to form a new sub-group; the modeling stamping fitness of each sub-group that meets the stamping die structure is iteratively calculated, and the stamping process parameters of the previous generation are updated; when the preset termination conditions are met, the optimal stamping process parameters are obtained; Based on the optimal stamping process parameters, the sum of the gap between the part and the die and the gap inside the die is taken as the movement gap between the part and the die; when the angles between the upper flange of the styling and the upper flange of the front door side and the Z-direction of the vehicle body are equal, the minimum strength value required by the stamping die structure is defined as the stamping die strength verification value.

5. The method according to claim 4, characterized in that The iterative calculation satisfies the modeling stamping fitness of each subgroup of the stamping die structure, and updates the stamping process parameters of the previous generation; when the preset termination condition is met, the optimal stamping process parameters are obtained, including: According to different stamping die strengths and structural dimensions, different weights are selected to adjust the optimization results of stamping process parameters; Write the stamping process parameters generated by the initial population into the calculation model, run the calculation model through the code for simulation, and read the simulation results through the API. Iteratively calculate the fitness value of each generation of shape optimization based on the stamping process fitness; When the preset number of iterations is reached, the fitness values ​​of each generation calculated are sorted in descending order, and the stamping process parameters with the highest priority are selected as the optimal stamping process parameters for this optimization.

6. The method according to claim 5, characterized in that The minimum opening size of the target object is calculated by the following formula: THE min =(e / cosα+h)*sin(β-α)+k Where, L min It represents the minimum shape opening size, α represents the angle between the upper flange of the shape and the Z direction of the body; β represents the angle between the upper flange of the front door side and the Z direction of the body; h represents the height of the upper part of the shape from the front windshield mounting surface; L represents the shape opening size, e is the movement gap between the part and the mold; k is the strength verification value of the stamping mold.

7. The method according to claim 1, characterized in that After obtaining the stamping feasibility evaluation result of the target modeling object, the method further includes: when the stamping feasibility evaluation result of the target modeling object does not meet the stamping process constraint condition, adjusting the modeling opening size of the target modeling until the modeling opening size actually measured is not less than the minimum modeling opening size; When the stamping feasibility evaluation result of the target modeling object meets the stamping process constraints, the elements and weights of the stamping feasibility evaluation index are defined in combination with the influencing factors of the A-pillar stamping, and the stamping feasibility of the A-pillar modeling is comprehensively evaluated.

8. The method according to claim 7, characterized in that The comprehensive evaluation value of stamping feasibility is calculated by the following formula: Where D i represents the comprehensive evaluation value of stamping feasibility, n is the factor that does not meet the stamping feasibility evaluation index, γ l is the weight of the factors that do not meet the stamping feasibility evaluation index.

9. A stamping feasibility verification system for passenger car A-pillar molding, characterized in that: The system comprises: A definition module is used to select any A-pillar of a passenger car located on the left and right sides of a front windshield of the vehicle and extending backward on both sides as a target modeling object; An acquisition module is used to collect modeling information of a target modeling object and obtain a stamping die matching the modeling information of the target modeling object from a predefined modeling database; A calculation module is used to determine the movement clearance between the part and the die and the die strength verification value based on the stamping strength and structural dimensions of the stamping die, and calculate the minimum modeling opening size of the target modeling object; The comparison and verification module is used to determine whether the target modeling object meets the stamping process constraint conditions by comparing the minimum modeling opening size with the actually measured modeling opening size, and obtain the stamping feasibility verification result of the target modeling object; wherein the stamping process constraint condition is that the actually measured modeling opening size of the target modeling object is not less than the minimum modeling opening size.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 8 are implemented.

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