Processing technology description content generation method based on three-dimensional CAD model

Abstract

The invention discloses a processing technology description content generation method based on a three-dimensional CAD model. The method comprises the following steps: establishing a processing technology description content template database; establishing a three-dimensional CAD model processing area vector database according to the processing technology description content template database; a three-dimensional CAD model view is established for a preset three-dimensional CAD model according to the working procedure and the working step granularity, size marking requirements needing to be machined and met are distributed to the three-dimensional CAD model view according to the working procedure and the working step, and a working procedure and working step size marking view set is formed; and according to the process step size marking view set, the processing technology description content template database and the three-dimensional CAD model processing area vector database, generating a process step technology description content result through model information extraction and view size marking associated area image interception. According to the method, the process procedure compiling efficiency is improved, and the normalization and consistency of the process description content of the process procedure are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of digital manufacturing, and in particular relates to a method for generating processing technology description content based on a three-dimensional CAD model. Background Art

[0002] At present, many machine-processed products use 3D design and 3D manufacturing technologies. In the process design of products, 3D CAD model information extraction, model information reuse, machine learning and other related technologies and means have laid a technical foundation for applying new ways and methods to carry out process design.

[0003] In the process of process design for machined products based on 3D CAD models, the main tasks include CNC machining program design, processing procedure preparation, etc. Usually, the preparation of processing procedure involves many aspects such as basic information of the procedure, process nodes, step nodes, process description, etc., especially the process description content generally accounts for a large proportion. Similar procedures or processing methods also have similarities in the textual expression of the process description content, or there are only some differences in the specific processing and index values. In the actual process of procedure preparation, too much repetitive work is prone to occur, which has a relatively large impact on work efficiency. In addition, since the process description content is mainly expressed in text, when the same or similar process description content is prepared by different personnel, it is also easy to have problems such as lack of standardization and consistency. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method for generating processing technology description content based on a three-dimensional CAD model, to improve the efficiency of process specification compilation, and to improve the standardization and consistency of the process description content of the process specification.

[0005] The object of the present invention is achieved through the following technical scheme: a method for generating processing technology description content based on a 3D CAD model, comprising: establishing a processing technology description content template database; establishing a 3D CAD model processing area vector database according to the processing technology description content template database; establishing a 3D CAD model view according to the process and step granularity of the preset 3D CAD model, and allocating the 3D CAD model view according to the process and step to be processed and the dimensioning requirements to be achieved to form a process and step dimensioning view set; based on the process and step dimensioning view set, the processing technology description content template database and the 3D CAD model processing area vector database, by extracting model information and capturing the image of the view dimensioning associated area.

[0006] In the above-mentioned method for generating processing description content based on a three-dimensional CAD model, establishing a processing description content template database includes: designing a processing description content template data table; extracting the process step content of the existing procedure according to the process step granularity of the processing process procedure, and generating a process description content text data set; applying regular expressions to process the process description content text data set to obtain a process description content template data set; filling the process description content template data set into the process description content template data table to obtain a processing description content template database.

[0007] In the above-mentioned method for generating processing technology description content based on three-dimensional CAD model, designing the processing technology description content template data table includes: designing the processing technology description content template data table according to two fields: ID and process description content.

[0008] In the above-mentioned method for generating processing technology description content based on the three-dimensional CAD model, the ID field is generated and filled in an integer self-increasing manner.

[0009] In the above-mentioned method for generating processing technology description content based on three-dimensional CAD model, establishing a three-dimensional CAD model processing area vector database according to the processing technology description content template database includes: based on each data item of the processing technology description content template database, selecting one or more three-dimensional models related to the process description content template, intercepting the processing area direction corresponding to the process description content template, and forming a processing area image data set; vectorizing the processing area image data set to form a processing area vector data set; establishing a processing area vector data table; filling the processing area vector data set into the processing area vector data table to form a processing area vector database.

[0010] In the above-mentioned method for generating processing technology description content based on the three-dimensional CAD model, establishing the processing area vector data table includes designing the processing area vector data table according to two fields: ID and area image vector.

[0011] In the above-mentioned method for generating processing description content based on the three-dimensional CAD model, the ID field value of the processing area vector database is consistent with the ID field value of the process description content template database.

[0012] In the above-mentioned method for generating processing technology description content based on 3D CAD model, a 3D CAD model view is established according to the granularity of process and step for the preset 3D CAD model, and the 3D CAD model view is allocated with the dimensioning requirements that need to be processed and achieved according to the process and step to form a process and step dimensioning view set, including: establishing a processing technology description content generation module based on 3D model software tools; loading and starting the processing technology description content generation module for the preset 3D model, and establishing a 3D model view according to the process node and step name; and on the basis of the current 3D step model view, the processing dimensioning is allocated in sequence according to the consumable dimensioning allocation method to form a step dimensioning view set.

[0013] In the above-mentioned method for generating processing technology description content based on three-dimensional CAD model, according to the process step dimensioning view set, the processing technology description content template database and the three-dimensional model processing area vector database, the process step process description content result is generated through model information extraction and view dimensioning associated area image capture, including: traversing the process step dimensioning view set, identifying the view annotation area by image recognition, and forming a process step area image data set by image capture; traversing the process step area image data set, and forming a process step area image vector data set by image vector conversion based on a machine learning model; traversing the process step area image vector data set, querying the processing area vector database according to the cosine similarity method, obtaining the most similar data according to the set threshold, and forming a processing area similarity data set; traversing the current process step dimensioning view set, identifying and extracting the dimension expression method and dimension value, converting them into dimension templates, and forming a dimension template value data set; matching the processing technology description content template database according to the dimension template of the dimension template value data set and the value of the processing area similar data set, and obtaining the best matching process description content template; filling the dimension value of the dimension template value data set into the best matching process description content template to generate the process step process description content result.

[0014] In the above-mentioned method for generating processing technology description content based on the three-dimensional CAD model, an image-to-quantity machine learning model is applied to vectorize the processing area image data set to form a processing area vector data set.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention is based on a three-dimensional CAD model, and forms a process step dimensioning view by allocating the dimensioning requirements that need to be processed and achieved according to the process steps. Then, based on the view, the model information is extracted and the image of the view dimensioning-related area is captured to realize the automatic generation of the process step process description content, thereby improving the efficiency of process specification compilation and improving the standardization and consistency of the process description content of the process specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 It is a flow chart of a method for generating processing technology description content based on a three-dimensional CAD model provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] After a certain amount of 3D CAD models and model-based processing procedure data has accumulated, it is possible to use the correlation between the 3D CAD models and the process specifications and process description contents. By extracting the model data, establishing the corresponding generation models and software tools, and reusing the 3D CAD model data and process description content knowledge data, it is possible to realize the automatic generation of processing procedure description contents, thereby replacing manual compilation work.

[0021] Figure 1 1 is a flow chart of a method for generating processing description content based on a three-dimensional CAD model provided by an embodiment of the present invention. Figure 1 As shown, the method includes the following steps: establishing a processing technology description content template database; establishing a 3D CAD model processing area vector database based on the processing technology description content template database; establishing a 3D CAD model view according to the process and step granularity of the preset 3D CAD model, and assigning the 3D CAD model view to the dimensioning requirements that need to be processed and achieved according to the process and step to form a process and step dimensioning view set (c.3); based on the process and step dimensioning view set (c.3), the processing technology description content template database and the 3D CAD model processing area vector database, the process and step process description content results are generated by extracting model information and capturing images of the area associated with the view dimensioning.

[0022] Establishing a processing technology description content template database includes: designing a processing technology description content template data table; extracting the process step content of the existing process according to the process step granularity of the processing technology specification to generate a process description content text data set (a.2); applying regular expressions to process the process description content text data set to obtain a process description content template data set (a.3); filling the process description content template data set (a.3) into the process description content template data table (a.1) to obtain a processing technology description content template database (a.4).

[0023] The processing technology description content template data table is designed including: the processing technology description content template data table is designed according to two fields, namely, ID and process description content.

[0024] The ID field is generated and filled in an auto-incrementing integer.

[0025] Establishing a three-dimensional CAD model processing area vector database based on a processing process description content template database includes: based on each data item of the processing process description content template database (a.4), selecting one or more three-dimensional CAD models related to the process description content template, intercepting the processing area direction corresponding to the process description content template, and forming a processing area image data set (b.1); applying an image-to-quantum machine learning model to vectorize the processing area image data set (b.1) to form a processing area vector data set (b.2); establishing a processing area vector data table (b.3); and filling the processing area vector data set (b.2) into the processing area vector data table (b.3) to form a processing area vector database (b.4).

[0026] Establishing the processing area vector data table (b.3) includes designing the processing area vector data table according to the two fields of ID and area image vector.

[0027] The ID field value of the processing area vector database (b.4) is consistent with the ID field value of the process description content template database (a.4).

[0028] The preset 3D CAD model is used to establish a 3D CAD model view according to the process and step granularity, and the 3D CAD model view is assigned the dimensioning requirements that need to be processed and achieved according to the process and step, so as to form a process and step dimensioning view set (c.3), including: based on the 3D CAD model software tool, a processing technology description content generation module (c.1) is established; for the preset 3D CAD model, the processing technology description content generation module (c.1) is loaded and started, and the 3D CAD model view (c.2) is established according to the process node and the step name; based on the current 3D step CAD model view (c.2), the processing dimensioning is allocated in sequence according to the consumable dimensioning allocation method to form a step dimensioning view set (c.3).

[0029] Based on the process step dimensioning view set (c.3), the processing technology description content template database and the 3D CAD model processing area vector database, the process step process description content results are generated by extracting model information and capturing the image of the associated area of ​​the view dimensioning, including:

[0030] Traverse the work step dimension annotation view set (c.3), identify the view annotation area by image recognition, and form a work step area image data set by image capture (c.4);

[0031] Traverse the work step area image dataset (c.4), and form a work step area image vector dataset (c.5) through image vector conversion based on a machine learning model;

[0032] Traverse the process step area image vector data set (c.5), query the processing area vector database (b.4) according to the cosine similarity method, obtain the most similar data according to the set threshold, and form a processing area similarity data set;

[0033] Traverse the dimension annotation view set of the current process step (c.3), identify and extract the dimension expression method and dimension value, convert them into dimension templates, and form a dimension template value data set (c.7);

[0034] According to the size template of the size template numerical data set (c.7) and the ID value of the processing area similarity data set (c.6), the processing process description content template database (a.4) is matched to obtain the best matching process description content template (c.8);

[0035] Fill the dimension values ​​of the dimension template numerical data set (c.7) into the best matching process description content template (c.8) to generate the process description content results of the process step.

[0036] Establish a processing technology description content template database:

[0037] The processing procedure is generally composed of processing procedures and process sequence. When constructing a processing procedure description content template database and forming a reusable processing procedure description content template, the first step is to extract information from the existing processing procedure according to the process step granularity, and then replace the specific values ​​in the process description content text according to certain rules for processing and establishment. For example, for the following process step content description:

[0038] Step 1: Turning the outer circle Length 18±0.5.

[0039] By applying regular expressions, the parts of the process description text related to specific processing values ​​are parsed and replaced with corresponding words and symbols to establish and form the process description content template in the following form:

[0040] Step 1: Turn the outer circle Φ{d}{+,-}, length {d}{+,-}.

[0041] The process description content template is saved in a database table in the form of a text string, with a self-increasing integer sequence number as a unique ID, to form a process description content template database.

[0042] Establish a 3D CAD model processing area vector database:

[0043] The establishment of a 3D CAD model processing area vector database is mainly to give the association between the 3D model processing area and the processing technology description content template. The same processing technology description content template item can correspond to one or more 3D CAD model processing areas. When establishing the 3D CAD model processing area, a method of taking a screenshot from the 3D CAD model view to form the processing area image data is adopted.

[0044] By converting the processing area image data into vector data, the similarity between the processing areas can be calculated and given in a cosine similarity manner, so that similarity retrieval can be achieved in the processing area vector database for the processing area of ​​the current model.

[0045] The processing area vector database contains three fields: ID, area image data, and area image vector, among which the ID field maintains the corresponding relationship with the processing content description template database.

[0046] Application process description content generation tool:

[0047] The process description content generation tool has the functions of opening the current 3D CAD model, establishing 3D CAD model views according to the granularity of processes and steps, and consumably distributing the processing dimension annotations on the model in each process and step view.

[0048] After the process and step views are completed, the function of further extracting and analyzing the information of the current view dimension annotation is available to generate a text string composed of expression symbols and characteristic values. For example:

[0049] Expression symbol: {d}{+,-}, characteristic value: 2, +0.2, 0

[0050] Expression symbol: Φ{d}{+,-}, characteristic value: 34.5, 0.1, 0.1

[0051] Expression symbol: Φ{d}{+,-}, characteristic value: 16, 0.1, 0.1

[0052] After the view dimension annotation information is extracted and parsed, the area image related to the dimension annotation on the model view is intercepted by image recognition. By vectorizing the currently intercepted area image and performing a similar search in the 3D CAD model processing area vector database, the existing and similar processing area ID can be obtained.

[0053] Based on the acquired existing processing area ID, a search is performed in the processing technology description content template database to obtain a corresponding processing technology description content template data set.

[0054] For the expression symbols and characteristic values ​​recognized in the current work step view, the best process description content template is obtained by matching them in the acquired processing technology description content template data set.

[0055] The feature values ​​identified in the work step view are used to fill in the template to automatically generate the process description content text at the work step granularity.

[0056] This embodiment is based on a three-dimensional CAD model. By allocating three-dimensional dimension annotations and extracting model and view information according to the granularity of processes and steps, a process description content template database and a processing area vector database are established. Through similarity matching, template filling and other methods and means, the automatic generation of processing process description content based on the three-dimensional CAD model is achieved.

[0057] The specific implementation steps are:

[0058] (1) Design the processing technology description content template data table (a.1) according to the two fields of ID and process description content.

[0059] Serial number Field Name Field Type 1 ID text 2 Process Description text

[0060] The "ID" field is generated and filled in an integer auto-incrementing manner.

[0061] (2) According to the granularity of the process steps in the processing technology specification, the process step content of the existing specification is extracted to generate a text dataset of process description content (a.2).

[0062] (3) Traverse the process description text data set (a.2), apply regular expressions, and replace the specific values ​​with corresponding numerical codes, for example Replace with Then, duplicate data items are removed to form a process description content template data set (a.3).

[0063] (4) Save the process description content template data set (a.3) to the process description content template data table (a.1) and establish a process description content template database (a.4).

[0064] (5) Based on each data item of the process description content template database (a.4), one or more three-dimensional CAD models related to the process description content template are selected, and the processing area direction corresponding to the process description content template is intercepted to form a processing area image data set (b.1).

[0065] (6) Apply the image-to-vector machine learning model to vectorize the processing area image dataset (b.1) to form a processing area vector dataset (b.2).

[0066] (7) The processing area vector data set (b.2) is saved to the processing area vector data table (b.3) to form a processing area vector database (b.4), in which the ID field value is consistent with the ID field value of the process description content template database (a.4).

[0067] Serial number Field Name Field Type 1 ID text 2 Region Image Vector text

[0068] (8) Based on the 3D CAD model software tool, a processing technology description content generation module (c.1) is established through secondary development.

[0069] (9) Use 3D CAD model software tools to open the 3D CAD model used to generate processing technology description content.

[0070] (10) For the opened 3D CAD model for generating processing technology description content, load and start the processing technology description content generation module (c.1), and establish the process step 3D CAD model view (c.2) (3D CAD model view) according to the process step name.

[0071] (11) Based on the current three-dimensional process step CAD model view (c.2), the corresponding processing dimension annotations are assigned in sequence according to the consumable dimension annotation allocation method to form a process step dimension annotation view set (c.3).

[0072] (12) Traverse the work step dimension annotation view set (c.3), identify the view annotation area by image recognition, and form a work step area image data set (c.4) by image capture.

[0073] (13) Traverse the work step area image dataset (c.4), and form a work step area image vector dataset (c.5) through image vector conversion based on the machine learning model.

[0074] (14) Traverse the process step area image vector data set (c.5), query the processing area vector database (b.4) according to the cosine similarity method, obtain the most similar data according to the set threshold, and form a processing area similarity data set (c.6).

[0075] (15) Traverse the current CAD model step dimension annotation view data set (c.3), identify and extract the dimension expression method ( R, etc.), dimension values, and convert them into dimension templates, such as Form a size template numerical data set (c.7).

[0076] (16) Apply the dimension template of the dimension template numerical data set (c.7) and the ID value of the processing area similarity data set (c.6) to match the process description content template database (a.4) to obtain the best matching process description content template (c.8).

[0077] (17) Apply the dimension values ​​of the dimension type numerical data set (c.7) and the best matching process description content template (c.8), and generate the process description content result by filling the dimension data into the template.

[0078] This embodiment forms the data foundation for the generation of processing technology description content by establishing a processing technology description content template database and a three-dimensional CAD model processing area vector database; this embodiment applies a consumable three-dimensional CAD model dimensioning allocation method to simplify the construction of related processing area vector data; this embodiment realizes the automatic generation of processing technology description content by vector retrieval and process description content template filling. This embodiment is based on a three-dimensional CAD model, and forms a process step dimensioning view by allocating the dimensioning requirements that need to be processed and achieved according to the process steps. Then, based on the view, the model information is extracted and the image of the view dimensioning associated area is captured to realize the automatic generation of the process step process description content, thereby improving the efficiency of process specification compilation and the standardization and consistency of the process description content of the process specification.

[0079] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for generating processing description content based on a three-dimensional CAD model, characterized in that include: Establish a template database for processing technology description content; Establish a 3D CAD model processing area vector database based on the processing technology description content template database; The preset 3D CAD model is used to establish a 3D CAD model view according to the process and step granularity, and the 3D CAD model view is assigned the dimensioning requirements that need to be processed and achieved according to the process and step to form a process and step dimensioning view set; According to the process step dimensioning view set, the processing technology description content template database and the 3D CAD model processing area vector database, the process step technology description content results are generated by extracting model information and capturing images of the area associated with the view dimensioning.

2. The method for generating processing description content based on a three-dimensional CAD model according to claim 1, characterized in that: Establishing a processing technology description content template database includes: Design a processing technology description content template data sheet; According to the granularity of the processing steps in the processing technology specification, the process step content of the existing specification is extracted to generate a text data set of the process description content; Applying regular expressions, the process description content text dataset is processed to obtain the process description content template dataset; Fill the process description content template data set into the process description content template data table to obtain the processing process description content template database.

3. The method for generating processing description content based on a three-dimensional CAD model according to claim 2, characterized in that: The processing technology description content template data table is designed including: the processing technology description content template data table is designed according to two fields, namely, ID and process description content.

4. The method for generating processing description content based on a three-dimensional CAD model according to claim 3, characterized in that: The ID field is generated and filled in an auto-incrementing integer.

5. The method for generating processing description content based on a three-dimensional CAD model according to claim 1, characterized in that: The three-dimensional CAD model processing area vector database is established based on the processing technology description content template database, including: Based on each data item in the processing technology description content template database, one or more three-dimensional models related to the process description content template are selected, and the processing area direction corresponding to the process description content template is intercepted to form a processing area image data set; Vectorizing the processing area image data set to form a processing area vector data set; Establish a processing area vector data table; Fill the processing area vector data set into the processing area vector data table to form a processing area vector database.

6. The method for generating processing description content based on a three-dimensional CAD model according to claim 5, characterized in that: Establishing the processing area vector data table includes designing the processing area vector data table according to two fields: ID and area image vector.

7. The method for generating processing description content based on a three-dimensional CAD model according to claim 5, characterized in that: The ID field value of the processing area vector database is consistent with the ID field value of the process description content template database.

8. The method for generating processing description content based on a three-dimensional CAD model according to claim 1, characterized in that: The preset 3D CAD model is used to establish a 3D CAD model view according to the process and step granularity, and the 3D CAD model view is assigned the dimensioning requirements that need to be processed and achieved according to the process and step, forming a process and step dimensioning view set including: Based on 3D model software tools, establish a processing technology description content generation module; For the preset 3D model, load and start the processing technology description content generation module, and establish the 3D model view according to the process node and the process step name; Based on the current 3D process step model view, the processing dimensions are allocated in sequence according to the consumable dimension allocation method to form a process step dimension view set.

9. The method for generating processing description content based on a three-dimensional CAD model according to claim 1, characterized in that: According to the process step dimensioning view set, the processing technology description content template database and the 3D model processing area vector database, the process step process description content results are generated by extracting model information and capturing the image of the associated area of ​​the view dimensioning, including: Traverse the work step dimension annotation view set, identify the view annotation area by image recognition, and form a work step area image data set by image capture; Traversing the work step area image dataset, and forming a work step area image vector dataset through image vector conversion based on a machine learning model; Traverse the process step area image vector data set, query the processing area vector database according to the cosine similarity method, obtain the most similar data according to the set threshold, and form a processing area similarity data set; Traverse the dimension annotation view set of the current process step, identify and extract the dimension expression method and dimension value, convert them into dimension templates, and form a dimension template value data set; According to the dimension template of the dimension template numerical data set and the value of the processing area similar data set, the processing technology description content template database is matched to obtain the best matching process description content template; Fill the dimension values ​​of the dimension template numerical data set into the best matching process description content template to generate the process description content results of the process step.

10. The method for generating processing description content based on a three-dimensional CAD model according to claim 5, characterized in that: The image-to-vector machine learning model is applied to vectorize the processing area image dataset to form a processing area vector dataset.

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