CN107330178B - Automatic construction system of digital prototype based on Pro/E spacecraft final assembly process - Google Patents

Abstract

The invention discloses a Pro/E-based automatic construction system and a Pro/E-based automatic construction method for a digital prototype of a spacecraft assembly process. The invention can derive the PVZ-format lightweight model with the design information, not only solves the problem of browsing and viewing on a low-configuration host computer, but also can realize instant viewing and statistics of the query, positioning and fastening information according to the basic information and parameter information of the model.

Description

Automatic construction system of digital prototype based on Pro/E spacecraft final assembly process

technical field

The invention belongs to the technical field of spacecraft final assembly, in particular to a Pro/E-based spacecraft final assembly process digital prototype automatic construction system and method.

Background technique

At present, the product design work of various types of satellites in my country has been widely realized in 3D, and various design information is transmitted in the form of 3D models combined with externally controlled technical documents. Require. Realizing the rapid construction of process digital prototype based on 3D model is the premise and key to the subsequent work such as 3D process design and 3D delivery. However, there are still the following problems in the rapid construction of process digital prototypes:

1) The overall 3D design data is missing, and some data are still in the form of 2D diagrams;

2) The 3D modeling is not standardized, so that the assembly department cannot receive it correctly;

3) The final assembly information cannot be expressed explicitly, and a lot of interactive query work is required, which affects work efficiency;

4) Some key design information is separated from the 3D model, and information cannot be directly extracted from the 3D model.

Therefore, the essence of process digital prototype construction is the process of transforming the design information with the model as the carrier into manufacturing information. In this process, due to the complexity of the design information source, the automatic construction of the process digital prototype involved in the present invention needs to solve the following technologies problem:

1) To solve the problem of information sources existing in design information, which is mainly based on 3D model (including attributes) information and supplemented by 2D information (such as text and 2D pictures), it is necessary to structure and correlate 2D information to achieve Design information is expressed in full 3D format;

2) To solve the problem of non-standard three-dimensional modeling, it is necessary to establish three-dimensional model modeling rules, which are built into the system involved in the present invention, and ensure the standardization of three-dimensional design input through automatic inspection and manual identification;

3) Solve the identification, processing and display of manufacturing information in the design model, that is, to explicitly process the information contained in the design model, such as manufacturing dimensions, technical requirements, etc., to ensure that technicians, production and inspection personnel can intuitively obtain relevant information without the need for human interaction;

4) Convert the design model into the process model required for final assembly production, which mainly involves identification and display of product assembly relationships, automatic display of assembly size information, model lightweight processing, and process design information output for PDM systems.

In view of this, it is very necessary to construct and obtain the automatic construction system and method of the spacecraft final assembly process digital prototype.

SUMMARY OF THE INVENTION

The purpose of the invention is to clarify the processing mode of the process digital prototype, and to establish a reasonable and convenient processing flow for the basic process digital prototype construction process. Aiming at the assembly process of components such as instruments and equipment, the system of the invention carries out the construction of process model, the explicit expression of fasteners and the comprehensive information query of the three-dimensional assembly model. The goals achieved are as follows:

1) According to the different attributes of various product assembly models (such as instruments, cables, pipelines, brackets, etc.), the normative inspection of model geometry information and the integrity inspection of assembly information are realized, and on the basis of integrity inspection Automatically and manually supplement product assembly information;

2) The spacecraft final assembly products are divided into seven main product process objects, including instruments, cables, pipelines, decks, direct parts, heating circuits and thermal control layers. Other products are auxiliary product objects. According to the main and auxiliary process models Attributes and the assembly relationship between the combined models to realize the convenient specification of the association relationship between the process models and the rapid creation of the process model;

3) Based on the constructed process model, the explicit expression, comprehensive query, information extraction and output of process-related design information are realized;

4) A dedicated browser for lightweight models that can meet the needs of process writers to quickly browse, locate, query and classify.

The present invention is achieved through the following technical solutions:

The Pro/E-based spacecraft assembly process digital prototype automatic construction system of the present invention mainly includes the following modules: a three-dimensional design model receiving and checking module, a manufacturing information extraction and reconstruction module, and a process model output module;

The said 3D design model receiving and checking module checks according to the established 3D model modeling rules according to the Pro/E format-based spacecraft 3D design model and design files issued by the design department received by the final assembly production department. Modulo rules have been predefined in the system, mainly including but not limited to product information integrity check, component model modeling normative check, and product manufacturing information integrity check;

The manufacturing information extraction and reconstruction module includes an electromechanical thermal design information extraction and supplementary setting module, a product process master object-based association and marking module, and a process model building module. The electromechanical thermal information extraction and supplementary setting module combines the three-dimensional model. After identifying and extracting the information of mechanical products, electrical products, and thermal products, identify whether the product information is missing or irregular according to the predetermined inspection rules, and then manually supplement or adjust by the relevant personnel to form the other two modules. Data input; the association and labeling module based on the main object of the product process is to divide the final assembly products into seven categories and 24 sub-categories, and the data formed by the electromechanical thermal information extraction and supplementary setting modules are formed according to the seven categories of objects. 24 sub-categories of product objects are used as subsidiary products of seven categories of objects to clearly and completely express the spacecraft product structure and product assembly information; the process model building module is based on the main object of the product process. The new BOM formed by the association and marking module is input. By supplementing the process description and automatically generating product assembly PMI and other information, a process model (Pro/E format) oriented to the final assembly is formed, and the data required by the PDM is output and imported into the PDM system for supply. It is used in process design, and at the same time, the process model is imported into the PDM system after light-weight processing, and distributed to the final assembly site through the PDM system; the electromechanical thermal design information extraction and supplementary setting module extracts the manufacturing information in the 3D design model, and according to the requirements of the final assembly work The electromechanical thermal design information extraction and supplementary settings are performed on the 3D design model; the association and marking module based on the main object of the product process is used to specify the association relationship between the main object of the product process and the subsidiary objects, and is realized according to the layout and positional relationship The automatic or interactive association of accessory components to the main process object provides necessary input for the process model building module according to the set model attributes and associations; the process model building module is used to reconstruct the design model based on the final assembly requirements. The process model of the process model, the assembly structure form of the process model will be reconstructed and created according to the settings in the association and mark module based on the main process object;

The process model output module refers to the requirements of 3D process design and lightweight process model viewing, and the process model automatically outputs various reports, process digital prototypes (Pro/E format), lightweight process required for 3D process design. model (PVZ format) and view manufacturing information in the corresponding browse tool.

Wherein, the manufacturing information includes PMI information and comprehensive information.

Among them, the main functions of the association and marking module based on the main object of the product process include: automatic acquisition and classification of model type attributes; automatic identification of the main object of the product process; automatic designation of the main object of the product process based on fastening information; product process The interactive designation of the main object; the intelligent and interactive association of the product process main object and the product subordinate objects; the de-designation of the attributes of the product process main object model; the de-association of the main and auxiliary process objects.

Among them, the main functions of the process model building module include: automatic acquisition of component assembly information; generation of process models, including whole stars, platforms, cabins, decks, equipment models and other main process objects; Firmware model; according to the association relationship between the product process main object and the subordinate objects, the subordinate objects are assembled to the process main object.

Wherein, the product is divided into product process main object and auxiliary product object, wherein the product process main object includes instruments, cables, pipelines, decks, direct parts, heating circuits and thermal control multilayers.

The standardized PMI information is displayed quickly, which is used to mark the standardized process information. The process information mainly includes the position information of the thermistor of the deck board, the position information of the equipment thermistor and the technical requirements information of the component installation. The main functions include: marking the installation size information of the thermistor of the cabin; marking the installation size information of the equipment thermistor; marking the installation technical requirement information of the main object of the process; supporting the marking operation under the whole star/cabin section/board; Marking according to the interactive designation of the main process object; checking and updating of various marked information;

The process model information query and output realize the extraction of the whole star assembly product structure and the output of the lightweight model. The extraction of the product structure and the export of the lightweight model will be based on the process model, and the extracted product information can be used for inspection, comparison and report output. , the structured table can be directly imported into the 3D process design system for the automatic construction of process digital prototypes. The main functions include: acquisition of process digital prototype structure tree; fastening specification and quantity analysis; report output; lightweight model export.

Among them, product information includes product name and product code;

Among them, the product link information is the information of fastener information, grounding wire, and assembly accuracy requirements.

Missing or non-standard product information includes missing product name, missing fastener information, etc.

The automatic construction method of digital prototype of spacecraft final assembly process based on Pro/E mainly includes the following steps:

1) According to the 3D design model and design file based on Pro/E format received by the final assembly production department and issued by the design department, check according to the established 3D model modeling rules. The modeling rules have been predefined, mainly including but not limited to: Not limited to product information integrity check, component model modeling normative check, product manufacturing information integrity check;

2) By extracting the manufacturing information in the 3D design model, and performing electromechanical and thermal design information extraction and supplementary settings for the 3D design model according to the requirements of the final assembly work; specifying the relationship between the main object and the subsidiary objects of the product process, according to the layout and position relationship To realize the automatic or interactive association of accessory components to the main process object and provide necessary input for the process model building module according to the set model attributes and associations; on the basis of the design model, reconstruct the process model that meets the requirements of the final assembly. The assembly structure form will be reconstructed and created according to the settings in the association and marking module based on the main process object;

3) Facing the needs of 3D process design and lightweight process model viewing, the process model automatically outputs various reports, process digital prototypes (Pro/E format), lightweight process models (PVZ format) required for 3D process design, and View manufacturing information in the appropriate browsing tool.

The main aspects of the design quality after the system is launched are as follows:

1) Obtained a process model that can meet the needs of final assembly production;

2) Through the automatic identification of the model and the relationship, the automatic conversion of the design model to the process model can be realized without increasing the process time;

3) After the system goes online, by directly inheriting and extracting design information and related relationships from the design model, the construction speed of process data is greatly improved, and the association between structural data and 3D models is realized, ensuring the accuracy and timeliness of the data. sex;

4) The model organization is more in line with the process characteristics, and the related models are organized together to facilitate the acquisition of related information. The professional query tool developed by customs clearance can query and locate the component model according to the basic information and parameter information of the model.

5) The size of the model design model is very large, and the host with lower configuration cannot open or view the model smoothly. After the system goes online, the lightweight model in PVZ format with design information can be exported, which not only solves the problem of browsing and viewing on low-configured hosts, but also enables query, positioning and tightening information based on the basic information and parameter information of the model. Instant viewing and statistics.

Description of drawings

1 is a schematic structural diagram of a Pro/E-based spacecraft assembly process digital prototype automatic construction system module according to an embodiment of the present invention;

Fig. 2 is the working flow chart of a kind of Pro/E-based spacecraft final assembly process digital prototype automatic building system module according to an embodiment of the present invention;

Fig. 3 is the structural schematic diagram of model supplementary setting in the system of the present invention;

Fig. 4 is the structural representation of the model information integrity check in the system of the present invention;

5 is a schematic structural diagram of assembly relationship association and marking in the system of the present invention;

6 is a schematic structural diagram of product object release in the system of the present invention;

7 is a schematic structural diagram of adding label information in the system of the present invention;

8 is a schematic structural diagram of the output process model product structure in the system of the present invention;

Detailed ways

The following descriptions are specific implementations of the content of the present invention, and the content of the present invention will be further clarified below through specific implementations. Of course, the following specific embodiments are described only to illustrate different aspects of the present invention and should not be construed as limiting the scope of the present invention.

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

Referring to FIG. 1, FIG. 1 shows a schematic structural diagram of the module structure of the Pro/E-based spacecraft assembly process digital prototype automatic construction system of the present invention. Among them, the module structure of the automatic construction system for the digital prototype of the spacecraft final assembly process of the present invention mainly includes the following modules: a three-dimensional design model receiving and checking module, a manufacturing information extraction and reconstruction module, and a process model output module.

The working flow chart of the Pro/E-based spacecraft final assembly process digital prototype automatic building system module of the present invention is shown in Figure 2, and the working flow of the present invention is as follows:

First, after the design department completes the three-dimensional design of the spacecraft through the design data management system (Avidm system, etc.), it releases the three-dimensional design model of the spacecraft to the final assembly department in the design data management system. The final assembly department automatically or manually receives the 3D design model and design files through the interface between the design data management system and the process digital prototype automatic construction system.

Second, the technicians use the electromechanical thermal design information extraction and supplementary setting module to check the received 3D design model, including (but not limited to): product information integrity check such as product name and product code; component model modeling specifications (such as coordinate system definition, sketch modeling, etc.); completeness inspection of product manufacturing information, such as fastener information, grounding wire, assembly accuracy requirements, etc. The inspection rules involved in this inspection process are formulated by the final assembly department and predefined in the system. After the inspection is completed, the design input inspection report will be automatically output, and the items that do not meet the requirements of the rules will be prompted with colors, etc., and the craftsmen will manually confirm whether to require the design department to redesign or correct. As shown in Figure 4, the corresponding column of the table is the information type of the inspection, the structure tree on the left is the product object to be inspected, and the red part is the unqualified item.

Third, after using the electromechanical thermal design information extraction and supplementary setting module to check and set the received 3D design model, the specifications and complete model information required for subsequent work are formed. The process information is supplemented on the basis of the design model, which mainly involves the type definition of seven types of product process main objects and product subsidiary objects, which lays the foundation for the subsequent extraction of product structure based on the product process main object. As shown in Figure 3, relevant personnel use the electromechanical thermal design information extraction and supplementary setting module to set the product type and other information of the model, such as setting the corresponding BOM node to the corresponding type of deck, instrument, fastener, etc.

Fourth, in the association and marking module based on the main object of the product process, the system automatically reads the attribute information of 24 types of product objects, and automatically identifies the assembly relationship between the products. All product objects are organized in three levels: whole star, cabin segment, and deck, and the system automatically marks and extracts the hierarchical relationship. As shown in Figure 5, when the assembly relationship between some products (such as the instrument and the ground wire, between multiple instruments and a single bracket) is not easy to be automatically identified, the craftsman manually specifies the assembly relationship between the products and adds associated marks to be recognized by the system. The above tags can provide input for generating the corresponding process model in the process model module.

Fifth, in the process model module, taking the main object of the instrument product process as an example, a certain instrument A belongs to a product of a certain deck in a certain cabin. In the process model, its product structure is based on the whole star, cabin, The decks and instruments and their associated objects are organized. As shown in Figure 6, the assembly relationship and structure of the instrument and accessory products such as fasteners.

Sixth, according to the requirements of the manufacturing and assembly process, the product model and manufacturing information required for the production are automatically extracted or manually specified according to the production stage and product category. For example, when carrying out the final assembly of the instruments in the cabin, the technicians only need to extract the process model of the main object of the instrument product process and its ancillary products in the corresponding cabin, but do not need to extract other products such as cables, pipelines, or instruments in other cabins. , thereby improving the efficiency of assembly implementation. The process model structure tree extracted in this process is the product structure tree of the process digital prototype, which can output the product structure tree report and the process digital prototype product structure required by the 3D process design (the product structure, attribute data and model, etc.). Based on the above information, craftsmen can build a digital prototype of the process and carry out 3D process design in a 3D process design system (such as Teamcenter).

Seventh, during the implementation of final assembly, operators and inspectors need to view the lightweight process model (PVZ format). The lightweight process model is a process model (Pro/E format) organized by the process personnel based on the model information extraction based on the main object of the product process. The process model is constructed, PMI information is added (as shown in Figure 7, the thermistor assembly size is automatically marked), and the process requirement information is supplemented, and the process model is light-weighted, and comprehensive information query is carried out as needed. It should be noted that the technicians can perform comprehensive information query in the process model, and can also perform comprehensive information query in the lightweight process model. In the lightweight process model, operators can directly view fastener information such as instruments, product PMI information (such as assembly dimensions, etc.), and can also view assembly information of flexible products such as cables (such as laying paths, branch relationships, technical requirements, etc. ).

Although the specific embodiments of the present invention have been described and illustrated in detail above, it should be pointed out that those skilled in the art can make various equivalent changes and modifications to the above embodiments according to the spirit of the present invention, and the resulting All functions and effects shall fall within the protection scope of the present invention as long as they do not exceed the spirit covered by the description and the accompanying drawings.

Claims (12)

1. An automatic construction system for digital prototype of spacecraft final assembly process based on Pro/E, including the following modules: 3D design model receiving and checking module, manufacturing information extraction and reconstruction module, and process model output module; The said 3D design model receiving and checking module checks according to the established 3D model modeling rules according to the Pro/E format-based spacecraft 3D design model and design files issued by the design department received by the final assembly production department. Modular rules have been predefined in the system, including product information integrity check, component model modeling normative check, and product manufacturing information integrity check; The manufacturing information extraction and reconstruction module includes an electromechanical thermal design information extraction and supplementary setting module, a product process master object-based association and marking module, and a process model building module. The electromechanical thermal information extraction and supplementary setting module combines the three-dimensional model. After the information of mechanical products, electrical products, and thermal products is identified and extracted, whether the product information is missing or irregular is identified according to the predetermined inspection rules, and then manually supplemented or adjusted by relevant personnel to form a marking module and process model. The data input of the building module; the association and marking module based on the main object of the product process is to divide the final assembly products into seven categories and 24 sub-categories, and extract the electromechanical thermal information and supplement the data formed by the setting module according to seven categories. The objects form a new BOM structure, in which 24 sub-categories of product objects are all subordinate products of the seven categories of objects to clearly and completely express the spacecraft product structure and product assembly information; the process model building module is based on product technology. The association of the main object and the new BOM formed by the marking module are input. By supplementing the process description and automatically generating the information of the product assembly PMI, a process model for the final assembly is formed, and the data required by the PDM is output and imported into the PDM system for process design. At the same time, the process model will be imported into the PDM system after lightweight processing, and distributed to the final assembly site through the PDM system; the electromechanical thermal design information extraction and supplementary setting module extracts the manufacturing information in the three-dimensional design model, and according to the final assembly work requirements. The model performs electromechanical design information extraction and supplementary settings; the association and marking module based on the main product process object is used to specify the association relationship between the main product process object and the subordinate objects, and realize the pairing of subordinate components according to the layout and position relationship. The automatic or interactive association of the main process object provides input for the process model building module according to the set model attributes and associations; the process model building module is used to reconstruct the process model that meets the assembly requirements on the basis of the design model. The assembly structure of the model will be reconstructed and created according to the settings in the association and marking module based on the main process object; The process model output module refers to the demand for 3D process design and lightweight process model viewing, and the process model automatically outputs various reports, process digital prototypes, and lightweight process models required for 3D process design, and browse accordingly. View manufacturing information in the tool. 2 . The system for automatically constructing a digital prototype of a spacecraft final assembly process according to claim 1 , wherein the manufacturing information includes PMI information and process technical requirements required for final assembly implementation. 3 . 3. The system for automatically constructing a digital prototype of a spacecraft final assembly process as claimed in claim 1, wherein the function of the association and marking module based on the product process master object comprises: automatic acquisition and classification of model type attributes; product process master object automatic identification of product process master objects based on fastening information; interactive designation of product process master objects; intelligent and interactive association of product process master objects and product subsidiary objects; de-designation of product process master object model attributes; Disassociation of primary and secondary technology objects. 4. The system for automatically constructing a digital prototype of a spacecraft final assembly process according to claim 1, wherein the functions of the process model building module include: automatic acquisition of component assembly information; , deck, equipment model and product process master object; assemble the fastener model according to the fastening information; according to the relationship between the product process master object and the auxiliary object, assemble the auxiliary object to the process master object. 5. The system for automatically constructing a digital prototype of a spacecraft final assembly process according to claim 4, wherein the product is divided into a product process main object and an auxiliary product object, wherein the product process main object includes instruments, cables, pipelines, and decks , direct parts, heating circuits and thermal control multilayer. 6. The spacecraft final assembly process digital prototype automatic construction system as claimed in claim 1, wherein, Viewing the manufacturing information in the corresponding browsing tool further includes: marking the installation size information of the thermistor of the cabin; marking the installation size information of the equipment thermistor; marking the installation technical requirements information of the main process object; Carry out labeling operations under the deck; designate main process objects for labeling according to interaction; check and update all kinds of labelled information. 7. The system for automatically constructing a digital prototype of a spacecraft final assembly process according to claim 6, wherein the product information includes a product name and a product code. 8 . The system for automatically constructing a digital prototype of a spacecraft final assembly process according to claim 1 , wherein the situation of missing or irregular product information includes missing product name and missing fastener information. 9 . 9. The automatic construction method of digital prototype of spacecraft final assembly process based on Pro/E, including the following steps: 1) According to the 3D design model and design file based on Pro/E format received by the final assembly production department and issued by the design department, check according to the established 3D model modeling rules. The modeling rules have been predefined, including product information Integrity check, component model modeling normative check, product manufacturing information completeness check; 2) By extracting the manufacturing information in the 3D design model, and performing electromechanical thermal design information extraction and supplementary settings for the 3D design model according to the requirements of the final assembly work; specify the relationship between the main object and the subsidiary objects of the product process, according to the layout and position relationship To realize the automatic or interactive association of auxiliary components to the main process object and according to the set model attributes and associations; on the basis of the design model, reconstruct the process model that meets the requirements of the final assembly, and the assembly structure of the process model will be based on the main process. The association of objects and the setting of marking steps are refactored and created; 3) Facing the needs of 3D process design and lightweight process model viewing, the process model automatically outputs various reports, process digital prototypes, and lightweight process models required for 3D process design, and view manufacturing information in the corresponding browsing tools. 10. The method for automatically constructing a digital prototype of a spacecraft final assembly process according to claim 9, wherein the manufacturing information includes PMI information and comprehensive information. 11. The method for automatically constructing a digital prototype of a spacecraft final assembly process as claimed in claim 9, wherein the association relationship between the main object of the product process and the subsidiary object is specified, and the automatic connection of the subsidiary element to the main process object is realized according to the layout and the positional relationship. Or interactive association includes the following steps: automatic acquisition and classification of model type attributes; automatic identification of product process master objects; automatic designation of product process master objects based on fastening information; interactive designation of product process master objects; product process master objects and Intelligent and interactive association of product subordinate objects; de-assignment of product process master object model attributes; de-association of main and auxiliary process objects. 12. The method for automatically constructing a digital prototype of a spacecraft final assembly process as claimed in claim 9, wherein the reconstruction and creation of the process model comprises the following steps: automatic acquisition of component assembly information; Segment, deck, equipment model and product process master object; assemble the fastener model according to the fastening information; according to the association relationship between the product process master object and the auxiliary object, assemble the auxiliary objects to the process master object.

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