Honeycomb sandwich structure plate process feature extraction method based on three-dimensional model

Abstract

The invention provides a honeycomb sandwich structure plate process feature extraction method based on a three-dimensional model. The honeycomb sandwich structure plate process feature extraction method comprises the steps that a design model of a honeycomb sandwich structure plate is preprocessed and analyzed; calculating required process parameters by utilizing an analysis result, and outputting a data form after integration; performing target block detection on the pre-processed design model; performing color correction on the embedded part in the design model; according to the structural plate part list and the structural plate standard part list, structural parts in the design model after color correction are annotated; after annotation and annotation are completed, matters needing attention of the design model are perfected; and outputting the design model after target block detection, color correction, structural member annotation and precautions completion as a picture to guide the process manufacturing of the honeycomb sandwich structural plate. According to the method, the assembly structure of the product is refined to parts, part characteristics are analyzed and combined with process design requirements, fusion of processing requirements and quality control requirements in the process content is promoted, and the process design efficiency and quality are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of three-dimensional model process feature extraction, and in particular relates to a method for extracting process features of a honeycomb sandwich structure plate based on a three-dimensional model. Background Art

[0002] In the field of digital manufacturing technology for spacecraft, the existing structural plate process compilation method still has a large number of links that are mainly "manual", and there are problems such as low process design efficiency and limited quality control capabilities. In the process of structural plate process design, the biggest bottleneck is the identification and sorting of information in the design model, which is a large workload, lacks accuracy, and requires a lot of time for proofreading. Extracting process features based on the design model is one of the effective ways to solve the bottleneck problem. In order to ensure the high quality and high precision of structural plate honeycomb products, the description of the structural plate process content must be accurate. Therefore, the extraction requirements of process features in the design model must meet the process design requirements and assist process design, and its operability and efficiency must be high. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the inventors have conducted intensive research and provided a method for extracting process characteristics of honeycomb sandwich structure panels based on a three-dimensional model. The method refines the assembly structure of the product into parts, analyzes the part characteristics, and combines them with the process design requirements to promote the integration of processing requirements and quality control requirements in the process content, thereby realizing the effective extraction of process characteristics of honeycomb sandwich structure panels and improving process design efficiency and quality.

[0004] The technical solutions provided by the present invention are as follows:

[0005] In a first aspect, a method for extracting process features of a honeycomb sandwich structure panel based on a three-dimensional model comprises:

[0006] Preprocessing of design models of honeycomb sandwich panels;

[0007] Perform entity space geometric contour analysis, structural component structure analysis, and structural component attribute analysis on the pre-processed design model;

[0008] The analytical results of the design model are classified into output forms and the required process parameters are calculated using the analytical results;

[0009] Integrate the required analytical results and calculated process parameters, and output the structural plate list, structural plate parts list, structural plate standard parts list, and structural plate single plate matching list;

[0010] Performing target block detection on the preprocessed design model, and configuring target blocks for the design model that is not configured with target blocks;

[0011] Perform color correction on embedded parts in the design model, check whether the RGB value of the embedded parts is consistent with the preset RGB value, and adjust the RGB value of the embedded parts to be consistent with the preset RGB value;

[0012] According to the structural plate parts list and the structural plate standard parts list, the structural parts in the color-corrected design model are annotated to highlight the important feature information in the design model;

[0013] After the annotation is completed, the precautions of the design model are improved;

[0014] The design model after target block detection, color correction, structural part annotation and precautions is output as an image to guide the manufacturing process of honeycomb sandwich structure panels.

[0015] In a second aspect, a device for extracting process characteristics of a honeycomb sandwich structure plate based on a three-dimensional model comprises:

[0016] one or more processors;

[0017] a storage device for storing one or more programs,

[0018] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned three-dimensional model-based honeycomb sandwich structure panel process feature extraction method.

[0019] In a third aspect, a readable storage medium stores a computer program thereon, which, when executed by a processor, implements the above-mentioned method for extracting process characteristics of honeycomb sandwich structure panels based on a three-dimensional model.

[0020] In a fourth aspect, a computer program product is provided, comprising: a computer program (also referred to as code, or instruction), which, when run, executes the above-mentioned three-dimensional model-based honeycomb sandwich structure panel process feature extraction method.

[0021] A method for extracting process features of honeycomb sandwich panels based on a three-dimensional model provided by the present invention has the following beneficial effects:

[0022] (1) The present invention provides a method for extracting process features of honeycomb sandwich structure panels based on a three-dimensional model. Aiming at the characteristics of a multi-variety small-batch production mode, which requires frequent response to new workpieces and new processes, and relying solely on manual experience cannot achieve satisfactory processing results, the traditional "manual sorting of structural plate model information and process drawing drawing" is transformed into a "model automatic extraction and automatic drawing of process drawings" working mode, and in the process of editing the process, it assists process design, constructs structural plate model information processing, structural plate tooling target automatic assembly, embedded parts automatic color matching and inspection, and model information automatic labeling, forming a honeycomb sandwich structure panel process feature extraction method based on a three-dimensional model, realizing automatic extraction of design model information and picture production, supporting rapid design of structural plate processes, and further providing support for improving structural plate production efficiency and quality control capabilities;

[0023] (2) The present invention provides a method for extracting process characteristics of honeycomb sandwich structure panels based on a three-dimensional model, comprising: preprocessing and analyzing the design model of the honeycomb sandwich structure panel; calculating the required process parameters using the analysis results, integrating and outputting a data form; performing target block detection on the preprocessed design model; color correction on the embedded parts in the design model; annotating the structural parts in the color-corrected design model according to the structural plate parts list and the structural plate standard parts list; after the annotation is completed, improving the precautions of the design model; outputting the design model after target block detection, color correction, structural part annotation and precautions improvement as a picture to guide the process manufacturing of the honeycomb sandwich structure panel. The method of the present invention refines the assembly structure of the product into parts, analyzes the features of the parts, combines them with the process design requirements, promotes the integration of processing requirements and quality control requirements in the process content, realizes the effective extraction of process characteristics of the honeycomb sandwich structure panel, and improves the efficiency and quality of process design. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a flow chart of the process feature extraction method for honeycomb sandwich structure panels based on three-dimensional models;

[0025] Figure 2 The schematic diagram of the structure of the honeycomb sandwich structure panel shows, from top to bottom, the pressure balancing plate, the upper panel, the honeycomb core, the lower panel and the cured bottom plate.

[0026] Figure 3 Design a model for honeycomb sandwich panels before pretreatment;

[0027] Figure 4 Design a model for the pre-processed honeycomb sandwich panel;

[0028] Figure 5 This is a schematic diagram of the target block installation completion;

[0029] Figure 6Schematic diagram of embedded parts color analysis in the honeycomb sandwich panel design model;

[0030] Figure 7 Design a schematic diagram for adjusting the color of embedded parts in a honeycomb sandwich panel model;

[0031] Figure 8 Annotate the result diagram for the structural parts;

[0032] Figure 9 Added a diagram of precautions in the honeycomb sandwich panel design model. DETAILED DESCRIPTION

[0033] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0034] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0035] The present invention provides a method for extracting process characteristics of honeycomb sandwich structure panels based on a three-dimensional model, such as Figure 1 As shown, the following steps are included:

[0036] Step 1: pre-process the design model of the honeycomb sandwich structure panel.

[0037] The design model of the honeycomb sandwich structure panel is automatically filtered and the view is straightened, and the structural parts such as the upper panel, lower panel, curing bottom plate and equalizing plate of the design model are identified according to the model attribute information. Figure 2 This is a honeycomb sandwich panel, consisting of, from top to bottom, a pressure plate (not shown), an upper face plate, a honeycomb core, a lower face plate, and a curing base plate (not shown). The pressure plate and curing base plate serve as fixtures for the honeycomb sandwich panel. Automatic filtering removes obstructing panels, annotations, and hidden datums from embedded parts in the model. View alignment calculates the model's geometric features, generates an elevation view, and activates the elevation view. Figure 3 and Figure 4 Schematic diagrams of the design model of honeycomb sandwich structure panels before and after pretreatment, respectively.

[0038] Step 2: Perform entity space geometric contour analysis, structural component structure analysis, and structural component attribute analysis on the preprocessed design model.

[0039] By analyzing the geometric contours of the entity space, the outer boundary dimensions of the entity space are analyzed and extracted. The entity refers to all independent structural parts in the model; various embedded parts are classified and analyzed, their spatial boundary geometry is analyzed, and the boundary dimensions of the embedded parts are obtained.

[0040] Through structural component analysis, the structural information of each structural component of the honeycomb sandwich structure plate is obtained, such as the hole status of the cured base plate (whether it is scored), and the existence of special structural holes such as process holes is analyzed, including information such as diameter and quantity.

[0041] By parsing the structural component properties, the name, material, custom parameters, etc. of each structural component can be obtained.

[0042] Step 3: Classify the analytical results of the design model according to the output form and use the analytical results to calculate the required process parameters.

[0043] For example, the length, width, and thickness of the extracted geometric outlines of the upper and lower panels, pressure-equalizing plates, and curing base plates within a structural panel are calculated, along with the sheet material area (length × width). For embedded parts, raw material dimensions, specifications, and weight are calculated based on the embedding type (front embedding or side embedding). The blanking template dimensions are calculated using the blanking dimension calculation algorithm. This calculation supports various process allowance settings and allows process designers to adjust process parameters.

[0044] Integrate the required analytical results and calculated process parameters, and output the structural plate list, structural plate parts list, structural plate standard parts list and structural plate single plate matching list.

[0045] The structural plate list records the process parameter information of the honeycomb sandwich structure plate, see Table 1;

[0046] The structural plate parts list records the embedded parts parameter information, see Table 2;

[0047] The parameter information of standard parts is recorded in the standard parts list of structural plates, see Table 3;

[0048] The supporting parts information of each honeycomb sandwich structure panel is recorded in the structural panel single plate supporting list, see Table 4.

[0049] Table 1 Structural plate list

[0050]

[0051] Table 2 Structural plate parts list

[0052]

[0053]

[0054] Table 3 List of standard parts for model structural plates

[0055] Serial number name Specification Technical conditions quantity For structural plate code 1 2 3 … …

[0056] Table 4 Structural plate single plate matching list

[0057]

[0058]

[0059] Step 4: Target block detection is performed on the pre-processed design model. If the target block is detected, the target block is no longer assembled. If the target block is not detected, the closest straight-line distance from the two long sides of the cured base plate to the lower panel is detected. If the distance between the cured base plate and the lower panel is less than 50 mm, the long side of the cured base plate is offset outward by 50 mm, but only on the side where the distance between the cured base plate and the lower panel is less than 50 mm. Figure 5 The target block in the model is shown.

[0060] Step 5: Perform color correction on the embedded parts in the design model, check whether the RGB value of the embedded parts is consistent with the preset RGB value, and adjust the RGB value of the embedded parts to be consistent with the preset RGB value. Figure 6 and Figure 7 They are respectively schematic diagrams of embedded parts color analysis and color adjustment.

[0061] During the processing of honeycomb sandwich structures, models are projected, and operators use the projection to machine holes or install embedded parts. To this end, similar color analysis (with a system-defined color tolerance range) is used to identify colors that affect projection recognition and their approximate colors. The colors of the corresponding structural components are then temporarily adjusted to eliminate any impact on post-projection recognition.

[0062] Step 6: Annotate the structural parts in the color-corrected design model according to the structural plate parts list and the structural plate standard parts list to highlight important feature information in the design model.

[0063] Annotate all embedded parts and mark the laying direction of the honeycomb core. Randomly select one of the same embedded parts and mark the number of embedded parts of this type. Figure 8 If the design model is large, and the annotations pointing to embedded parts overlap during automatic annotation, making it unclear which embedded part the annotation is for, change the annotation to point to other embedded parts of the same type.

[0064] Step 7: After the annotation is completed, the design model precautions are improved. The first five precautions are the structural plate code, version number, honeycomb core specifications, height and direction, and lower panel code. Figure 9 , read the corresponding parameters from the structural plate list and the structural plate single plate matching list, and also obtain other required parameter values. Finally, read the precautions pre-entered by the designer in the design model and implement integration.

[0065] Step 8: Output the design model after target block detection, color correction, structural part annotation and precautions as an image to guide the manufacturing process of honeycomb sandwich structure panels.

[0066] The present invention also provides a device for extracting process characteristics of a honeycomb sandwich structure plate based on a three-dimensional model, comprising:

[0067] one or more processors;

[0068] a storage device for storing one or more programs,

[0069] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned three-dimensional model-based honeycomb sandwich structure panel process feature extraction method.

[0070] The present invention also provides a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for extracting process characteristics of honeycomb sandwich structure panels based on a three-dimensional model.

[0071] The readable storage medium includes, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0072] The present invention also provides a computer program product, which includes: a computer program (also referred to as code, or instructions), which, when run, executes the above-mentioned three-dimensional model-based honeycomb sandwich structure panel process feature extraction method.

[0073] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another.

[0074] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0075] The present invention has been described in detail above with reference to specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present invention. Those skilled in the art will appreciate that various equivalent substitutions, modifications, or improvements may be made to the technical solutions and implementations of the present invention without departing from the spirit and scope of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0076] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A method for extracting process features of honeycomb sandwich panels based on a three-dimensional model, characterized in that: include: Preprocessing of design models of honeycomb sandwich panels; Perform entity space geometric contour analysis, structural component structure analysis, and structural component attribute analysis on the pre-processed design model; The analytical results of the design model are classified into output forms and the required process parameters are calculated using the analytical results; Integrate the required analytical results and calculated process parameters, and output the structural plate list, structural plate parts list, structural plate standard parts list, and structural plate single plate matching list; Performing target block detection on the preprocessed design model, and configuring target blocks for the design model that is not configured with target blocks; Perform color correction on embedded parts in the design model, check whether the RGB value of the embedded parts is consistent with the preset RGB value, and adjust the RGB value of the embedded parts to be consistent with the preset RGB value; According to the structural plate parts list and the structural plate standard parts list, the structural parts in the color-corrected design model are annotated to highlight the important feature information in the design model; After the annotation is completed, the precautions of the design model are improved; The design model after target block detection, color correction, structural part annotation and precautions is output as an image to guide the manufacturing process of honeycomb sandwich structure panels.

2. The process feature extraction method of honeycomb sandwich structure panels based on a three-dimensional model according to claim 1, characterized in that: The step of preprocessing the design model of the honeycomb sandwich structure plate includes: automatically filtering and straightening the view of the design model of the honeycomb sandwich structure plate, identifying each structural component according to model attribute information, and hiding the baseline, interface annotation information of the design model or some structural components in the design model as needed.

3. The process feature extraction method of honeycomb sandwich structure plate based on three-dimensional model according to claim 1, characterized in that: The steps of performing entity space geometric contour analysis, structural component structure analysis, and structural component attribute analysis on the pre-processed design model include: By analyzing the geometric contours of the solid space, the outer boundary dimensions of the structural parts are analyzed and extracted, including differentiating and analyzing various embedded parts to obtain the boundary dimensions of the embedded parts. Through structural analysis of structural components, the structural information of each structural component of the honeycomb sandwich structure is obtained, including the hole status of the solidified base plate, and the existence of structural holes, the diameter and number of structural holes are analyzed; By parsing the structural member properties, the name, material and custom parameters of each structural member are obtained.

4. The method for extracting process characteristics of honeycomb sandwich panels based on a three-dimensional model according to claim 1, characterized in that: In the step of outputting the structural panel list, the structural panel parts list, the structural panel standard parts list and the structural panel single plate matching list, the structural panel list records the process parameter information of the honeycomb sandwich structural panel; The structural plate parts list records the parameter information of embedded parts; the structural plate standard parts list records the parameter information of standard parts; The structural panel single plate matching list records the matching parts information of each honeycomb sandwich structural panel.

5. The process feature extraction method of honeycomb sandwich structure panel based on three-dimensional model according to claim 1, characterized in that: After the step of color correction of the embedded parts in the design model, the method further includes: finding the color and its approximate color that affect the projection recognition through approximate color analysis, and temporarily adjusting the color of the corresponding structural parts so that it does not affect the recognition of the structural parts after projection.

6. The method for extracting process characteristics of honeycomb sandwich panels based on a three-dimensional model according to claim 1, characterized in that: The step of annotating the structural parts in the color-corrected design model according to the structural plate parts list and the structural plate standard parts list includes: annotating all embedded parts and marking the laying direction of the honeycomb core, randomly selecting one of the same embedded parts for annotation, and marking the number of embedded parts of this type.

7. The method for extracting process characteristics of honeycomb sandwich panels based on a three-dimensional model according to claim 1, characterized in that: After the annotation is completed, the step of improving the precautions of the design model includes improving the structural plate code, version number, honeycomb core specifications, height and direction, and lower panel code of the design model.

8. A device for extracting process characteristics of honeycomb sandwich structure panels based on a three-dimensional model, characterized in that: include: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the three-dimensional model-based honeycomb sandwich structure panel process feature extraction method according to any one of claims 1 to 7.

9. A readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the method for extracting process characteristics of a honeycomb sandwich structure panel based on a three-dimensional model as claimed in any one of claims 1 to 7 is implemented.

10. A computer program product, characterized in that The computer program product comprises: a computer program, which, when run, executes the method for extracting process characteristics of honeycomb sandwich structure panels based on a three-dimensional model according to any one of claims 1 to 7.

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