A feature-based micro-parts forming simulation method and system

Abstract

The present disclosure provides a feature-based micro-part molding simulation method and system, which relates to the field of micro-part processing design, and includes the following steps: modeling and identifying the features of each structure according to the target micro-part, combining the processing method of each feature, and obtaining all feasible processing sequence schemes; performing processing simulation according to the selected processing sequence scheme, sequentially forming each feature simulation result, and recording the processing steps with defects; performing processing simulation of all processing sequence schemes in sequence, and screening the processing sequence schemes without defective processing steps. Perform processing simulation on the processing sequence schemes in sequence, screen out the processing sequence schemes with defective processing steps, retain the processing sequence schemes without defects, assist in the design of the actual molding scheme, and reduce the flow defects in the micro-part processing process.

Description

Technical Field

[0001] The present disclosure relates to the field of micro-part processing design, and in particular to a feature-based micro-part molding simulation method and system. Background Art

[0002] In the process of forming micro parts, in order to take into account the requirements of processing efficiency and precision, molds are often used for stamping.

[0003] According to the shape of the target micro-parts, the corresponding mold is configured, and various features are distributed and formed, and finally the micro-parts that meet the requirements are output. During the processing, the blank undergoes plastic deformation under the constraint of the mold, but some features will cause unreasonable flow of the blank during processing, resulting in defects such as wrinkles. The feature size of micro-parts is small, and the defects of micro-parts are not easy to be found, but they often fail suddenly and cause the machine to stop operating. Compared with the one-time stamping method, the step-by-step stamping process can reduce the occurrence of blank defects, but there are still processing defects, and the processing order of different features has a direct impact on the generation of defects; at present, the feature forming process of micro-parts is often carried out through blank experiments, but different feature forming processes not only require adjusting the action sequence of the processing mold, but also require the mold to be redesigned, resulting in the difficulty of defect control of micro-parts. Summary of the invention

[0004] The purpose of the present disclosure is to address the defects of the prior art and provide a feature-based micro-part molding simulation method, system, computer-readable storage medium and electronic device. The method sorts the feature processing steps after modeling, simulates the processing sequence schemes in turn, screens out the processing sequence schemes with defective processing steps, retains the processing sequence schemes without defects, assists in the design of the actual molding scheme, and reduces the flow defects in the micro-part processing process.

[0005] The first object of the present disclosure is to provide a feature-based micro-part molding simulation method, comprising the following steps:

[0006] Model the target micro-parts and identify the features of each structure, and combine the processing methods of each feature to obtain all feasible processing sequence solutions;

[0007] Perform machining simulation according to the selected machining sequence scheme, form simulation results of each feature in turn, and record the machining steps where defects occur;

[0008] The processing simulation of all processing sequence plans is carried out in sequence to screen the processing sequence plan without defective processing steps.

[0009] Furthermore, the micro-component is provided with a flange structure and an inner hole structure, and both the flange structure and the inner hole structure serve as structural features.

[0010] Furthermore, after obtaining all the features of the micro-part model, multiple processing sequence schemes are obtained based on the processing sequence of different features;

[0011] Finite element simulation is performed based on the blank model combined with the processing sequence plan to generate each feature in turn.

[0012] Furthermore, the defects are defects caused by flow during the processing simulation.

[0013] Furthermore, after recording the processing steps where defects occur, the features that cause the defects are determined, and the order of the feature processing methods in the processing sequence plan is adjusted to obtain a feasible processing sequence plan.

[0014] Furthermore, after determining the processing step where the defect occurs, other solutions with the same processing sequence as when the defect occurs are screened out.

[0015] Further, the processing sequence plans are sequentially simulated for the purpose of being defect-free, and the processing sequence plans that are defect-free after the simulated processing are selected;

[0016] After screening out the processing sequence solutions that meet the requirements, the model parameters are changed for verification, and the optimal processing sequence solution is obtained as the actual molding solution for the micro parts.

[0017] The second object of the present disclosure is to provide a feature-based micro-parts forming simulation system, which adopts the following technical solutions: including:

[0018] The solution generation module is configured to: model the target micro-parts and identify the features of each structure, and obtain all feasible processing sequence solutions in combination with the processing method of each feature;

[0019] The simulation processing module is configured to: perform processing simulation according to the selected processing sequence scheme, sequentially form various feature simulation results, and record the processing steps where defects occur;

[0020] The scheme screening module is configured to: perform processing simulations of all processing sequence schemes in sequence, and screen the processing sequence schemes without defective processing steps.

[0021] A third object of the present disclosure is to provide a computer-readable storage medium having a program stored thereon, which, when executed by a processor, implements the steps in the feature-based micro-part molding simulation method as described above.

[0022] A fourth object of the present disclosure is to provide an electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the feature-based micro-part forming simulation method as described above are implemented.

[0023] Compared with the prior art, the advantages and positive effects of the present disclosure are:

[0024] (1) After modeling, the characteristic processing steps are sorted, and the processing sequence plans are simulated in turn. The processing sequence plans with defective processing steps are screened out, and the processing sequence plans without defects are retained to assist in the design of the actual molding plan and reduce the flow defects in the micro-parts processing process.

[0025] (2) Micro parts are composed of different geometric features. The molding process is the process of forming the geometric features of the parts sequentially or simultaneously. The optimal molding sequence of different features in the parts is determined by finite element simulation to avoid the generation of defects and change the design in the early stage of design, thereby reducing the cost of changes in the later stage of design and manufacturing.

[0026] (3) From the perspective of product quality, molding simulation can be used to predict product defects in the design stage to ensure "first-time correct design" and reduce repeated trials in the manufacturing process, which helps to reduce product development costs, improve product quality and shorten product design and development time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure.

[0028] Figure 1 It is a schematic diagram of the first processing sequence scheme in Examples 1 and 2 of the present disclosure;

[0029] Figure 2 It is a schematic diagram of the second processing sequence scheme in Examples 1 and 2 of the present disclosure;

[0030] Figure 3 It is a schematic diagram of the third processing sequence scheme in Examples 1 and 2 of the present disclosure. DETAILED DESCRIPTION

[0031] Example 1

[0032] In a typical embodiment of the present disclosure, Figure 1-Figure 3 As shown, a feature-based micro-parts forming simulation method is given.

[0033] Traditional design paradigms based on proprietary technology are difficult to predict and reveal the flow pattern of materials in the early design stage, resulting in the fact that the design of micro-part processing procedures can only be achieved through actual processing. In response to the above problems, in this embodiment, the most reasonable forming sequence can be determined through finite element simulation based on part features to avoid defects caused by flow in flange micro-parts.

[0034] A slight change in the forming sequence can completely change the material flow pattern, thereby avoiding defects caused by irregular metal flow; from a geometric point of view, any metal forming part is composed of different geometric features. The metal forming process is actually a process of forming the geometric features of the part sequentially or simultaneously. Therefore, in this embodiment, the optimal forming sequence of different features in the part is determined by finite element simulation to avoid defects.

[0035] This is accomplished by following these steps:

[0036] 1. First, identify all the features of flange micro-parts, and determine all possible molding sequences according to the order in which different features are formed.

[0037] 2. Select forming sequence one, import the CAD model into CAE software for finite element simulation, and form each feature in sequence according to the order in forming sequence one.

[0038] 3. If defects caused by flow appear in the finite element simulation of molding sequence one, determine the characteristics of the defects, then perform simulation according to molding sequence two, and observe the molding results.

[0039] 4. Repeat step 3 with the goal of eliminating molding defects, try all possible molding sequences, and finally determine the best molding sequence for producing flange parts.

[0040] Specific, combined Figure 1-Figure 3 , a feature-based micro-parts forming simulation method includes the following steps:

[0041] Model the target micro-parts and identify the features of each structure, and combine the processing methods of each feature to obtain all feasible processing sequence solutions;

[0042] Perform machining simulation according to the selected machining sequence scheme, form simulation results of each feature in turn, and record the machining steps where defects occur;

[0043] The processing simulation of all processing sequence plans is carried out in turn, and the processing sequence plan without defective processing steps is selected as the actual molding plan of the micro-parts.

[0044] The detailed process of each step is described with reference to the accompanying drawings:

[0045] Micro parts are provided with flange structures and inner hole structures, which are prone to defects during stamping.

[0046] After obtaining all the features of the micro-part model, a variety of processing sequence schemes are obtained based on the processing sequence of different features; finite element simulation is performed based on the blank model combined with the processing sequence scheme to generate each feature in turn.

[0047] In order to improve the design of processing sequence plans, processing simulation tests can be carried out on some processing sequence plans first, and other processing sequence plans can be given by adjusting the steps during the test.

[0048] Specifically, after recording the processing steps where defects occur, the features that cause the defects are determined, and the order of the feature processing methods in the processing sequence plan is adjusted to obtain a feasible processing sequence plan.

[0049] In order to reduce the number of simulated processing times and the amount of calculation, after determining the processing steps where the defect occurs, other solutions with the same processing sequence as when the defect occurs are screened out.

[0050] If defects appear in the blank after the third feature is processed, other processing sequence plans with the same processing sequence of the first three features and features will be screened out to avoid repeated simulation processing tests.

[0051] The processing sequence schemes are simulated in sequence with the purpose of no defects, and the processing sequence schemes without defects after the simulated processing are selected; after selecting the processing sequence schemes that meet the requirements, the model parameters are changed for verification, and the theoretical feasibility of the processing sequence scheme is further verified.

[0052] From the perspective of product quality, predicting product defects in the design stage through molding simulation to ensure "first-time correct design" and reduce trial and error in the manufacturing process helps to reduce product development costs, improve product quality and shorten product design and development time.

[0053] In this embodiment, if Figure 1-3 As shown, taking a flange micro-part as an example, a detailed description of the feature-based micro-part forming simulation method is given.

[0054] The part shown in the figure has three features: flange, circular outer contour, and circular inner hole. Therefore, three molding sequence schemes are determined based on the part features:

[0055] The first type: Figure 1 As shown, the circular outer contour feature is formed first, and then the inner hole and flange features are formed.

[0056] Wrinkle defects appear after machining the flange part of the part.

[0057] The second type: Figure 2 As shown, the circular inner hole is formed first, and then the outer contour and flange features are formed.

[0058] After machining the flange part, there are defects on the flange.

[0059] The third type: Figure 3 As shown, the flange feature is formed first, and then the circular outer contour and circular inner hole features are formed.

[0060] The micro parts after processing have no obvious defects.

[0061] According to the above micro-part molding simulation method, the preferred molding sequence is: first forming the flange feature, and then forming the circular outer contour and the circular inner hole feature.

[0062] Example 2

[0063] In another embodiment of the present disclosure, Figure 1-Figure 3 As shown, a feature-based micro-parts forming simulation system is given.

[0064] include:

[0065] The solution generation module is configured to: model the target micro-parts and identify the features of each structure, and obtain all feasible processing sequence solutions in combination with the processing method of each feature;

[0066] The simulation processing module is configured to: perform processing simulation according to the selected processing sequence scheme, sequentially form various feature simulation results, and record the processing steps where defects occur;

[0067] The scheme screening module is configured to: perform processing simulations of all processing sequence schemes in sequence, and screen the processing sequence schemes without defective processing steps as the actual molding scheme of the micro-parts.

[0068] It can be understood that the working method of the feature-based micro-part molding simulation system is the same as the feature-based micro-part molding simulation method provided in Example 1. Please refer to the detailed description in the above Example 1 and will not be repeated here.

[0069] Example 3

[0070] In yet another embodiment of the present disclosure, a computer-readable storage medium is provided.

[0071] A program is stored thereon, and when the program is executed by a processor, the steps in the feature-based micro-part molding simulation method described in Example 1 are implemented.

[0072] The execution content of the specific steps is the same as the feature-based micro-part molding simulation method provided in Example 1. Please refer to the detailed description in the above Example 1 and will not be repeated here.

[0073] Example 4

[0074] In yet another embodiment of the present disclosure, an electronic device is provided.

[0075] The method comprises a memory, a processor and a program stored in the memory and executable on the processor. When the processor executes the program, the steps in the feature-based micro-part molding simulation method as described above are implemented.

[0076] The execution content of the specific steps is the same as the feature-based micro-part molding simulation method provided in Example 1. Please refer to the detailed description in the above Example 1 and will not be repeated here.

[0077] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A feature-based micro-parts forming simulation method, characterized in that: The following steps are involved: Model the target micro-parts and identify the features of each structure, and combine the processing methods of each feature to obtain all feasible processing sequence solutions; Perform machining simulation according to the selected machining sequence scheme, form simulation results of each feature in turn, and record the machining steps where defects occur; Perform processing simulations of all processing sequence plans in sequence, and select processing sequence plans without defective processing steps; The processing sequence scheme for screening the processing steps without defects specifically includes: After recording the processing steps where defects occur, determine the features that cause the defects, adjust the order of the feature processing methods in the processing sequence plan, and obtain a feasible processing sequence plan; After determining the processing step where the defect occurs, screen out other solutions with the same processing sequence as when the defect occurs; The processing sequence plans are simulated in sequence for the purpose of no defects, and the processing sequence plans without defects after the simulated processing are selected; After screening out the processing sequence plan that meets the requirements, the model parameters are changed for verification to obtain the optimal processing sequence plan as the actual molding plan for micro parts.

2. The feature-based micro-part molding simulation method according to claim 1, characterized in that: The micro-part is provided with a flange structure and an inner hole structure, and both the flange structure and the inner hole structure serve as structural features.

3. The feature-based micro-part molding simulation method according to claim 1, characterized in that: After obtaining all the features of the micro-part model, multiple processing sequence schemes are obtained based on the processing sequence of different features; Finite element simulation is performed based on the blank model combined with the processing sequence plan to generate each feature in turn.

4. The feature-based micro-part molding simulation method according to claim 1, characterized in that: The defects are defects caused by flow during the processing simulation.

5. A feature-based micro-parts forming simulation system, characterized in that: include: The solution generation module is configured to: model the target micro-parts and identify the features of each structure, and obtain all feasible processing sequence solutions in combination with the processing method of each feature; The simulation processing module is configured to: perform processing simulation according to the selected processing sequence scheme, sequentially form various feature simulation results, and record the processing steps where defects occur; The scheme screening module is configured to: sequentially perform processing simulations of all processing sequence schemes, and screen the processing sequence schemes without defective processing steps; The processing sequence scheme for screening the processing steps without defects specifically includes: After recording the processing steps where defects occur, determine the features that cause the defects, adjust the order of the feature processing methods in the processing sequence plan, and obtain a feasible processing sequence plan; After determining the processing step where the defect occurs, screen out other solutions with the same processing sequence as when the defect occurs; The processing sequence plans are simulated in sequence for the purpose of no defects, and the processing sequence plans without defects after the simulated processing are selected; After screening out the processing sequence plan that meets the requirements, the model parameters are changed for verification to obtain the optimal processing sequence plan as the actual molding plan for micro parts.

6. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the steps in the feature-based micro-part forming simulation method as described in any one of claims 1 to 4 are implemented.

7. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps in the feature-based micro-part forming simulation method as described in any one of claims 1 to 4 are implemented.

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