CN109033609B - Intelligent manufacturing oriented product process programming simulation method for aircraft machining part - Google Patents
Intelligent manufacturing oriented product process programming simulation method for aircraft machining part Download PDFInfo
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Abstract
The method for simulating the process programming of the product manufactured by the aircraft machining part facing the intelligent manufacturing constructs the whole process of the intelligent manufacturing of the machined product, and comprises the steps of realizing characteristic definition and standard modeling on the design and realizing the automatic programming of the process characteristic drive; establishing a collaborative process simulation and inspection platform; the method realizes the connection and transmission between a process simulation platform and each standard library, constructs a programming feature library and an operation library which are suitable for intelligent numerical control programming, establishes an intelligent manufacturing-oriented machining numerical control programming standard integration method, realizes the automatic programming and simulation operation environment of a machining feature-driven numerical control program, and further establishes comprehensive intelligent manufacturing.
Description
Technical Field
The invention provides a method for intelligently manufacturing a product process programming simulation of an aircraft machining part, and belongs to the field of aircraft manufacturing.
Background
Because the aircraft has higher rigorous requirements on reliability, comfort, economy and the like and faces the punctual delivery pressure of batch aircraft orders, the existing aircraft manufacturing technology system is only continuously attacked, so that the aircraft manufacturing technology system is difficult to adapt to the development and production characteristics and the customer requirements of the aircraft, and more advanced and applicable manufacturing technology and informatization technology are urgently needed to improve the manufacturing capability and level of civil aircraft. Particularly, for various structural members of the airplane mainly processed by numerical control, the workload of the numerical control processing accounts for more than 75% of the total workload of the part processing and manufacturing of the airplane, and in addition, the structural members have the characteristics of numerous types, large quantity, complex structure, large scale and obvious thin-wall deformation, so that the numerical control processing/process simulation with innovativeness, controllability, adaptability and global property is urgently required to be developed so as to remarkably improve the high-efficiency, high-quality and low-cost design, processing capability and level of the structural members of the airplane.
The system of the aviation enterprise is that each aviation manufacturing factory operates independently, so that each manufacturing process method and each programming method are independent and inconsistent, and the manufacturing link level of each factory is considered to be different, and the development is inconsistent. The overall level of aeronautical manufacture is slowly improved. Because the machining characteristics of the aircraft parts are complex, numerical control programming is carried out manually at the present stage, and too much experience of a technician is relied on, so that the programming efficiency is low and errors are easy to make. Is the technical bottleneck for realizing intelligent manufacturing.
Disclosure of Invention
Aiming at the problems, the invention provides a method for simulating the process programming of an intelligent manufacturing-oriented product of an aircraft machining part, which comprises the following steps:
1) The method comprises the following steps of (1) establishing an airplane digital design and machining process simulation information integration standard system:
1.1 Machine design and process simulation information integration definition standardization formulation:
1.1.1 Compiling a machining process model definition and related machining method specifications facing to the whole process and whole elements to obtain the integrity definition of a construction method, process information and resource information related to the design and process model construction, and carrying out systematic, systematic and normalized information processing and expression;
1.1.2 On the basis of the definition of the whole-process whole-element process model system, analyzing the core content of the processing and detection of the airplane parts, and performing semantic standardization processing to form a standard for guiding the whole-process whole-element process model construction;
1.1.3 Aiming at the construction method of the whole-process whole-element process model system, the element definition is carried out by adopting an element model modeling method: compiling a relevant specification on the basis of the definition of a process model of all elements in the whole process, and establishing an incidence relation among the process, the model and the elements;
1.2 Establishing a whole-process whole-element process model and a database system framework: aiming at multi-equipment cooperative processing, firstly determining cooperative transmission elements of multiple equipment, defining machine tool equipment element information and equipment interface information from a basic manufacturing resource library related to process processing, then establishing an incidence relation between the multi-equipment cooperative elements and equipment related to the part processing process, and providing a basis for analyzing a process model in actual processing;
1.3 Obtaining the integration standard of the digital design and machining process simulation information of the airplane: establishing an intelligent manufacturing-oriented airplane digital design and machining process simulation information integration standard system according to the design model and the association relationship between the design characteristics and the machining characteristics obtained in the steps 1.1) -1.2).
2) Knowledge base construction technology:
2.1 Build a knowledge base:
2.1.1 Dividing key processing characteristics and processing stages in the manufacturing process of the airplane structural member, and compiling modeling specifications of basic manufacturing resources; establishing a process knowledge model in a classification manner according to potential rules in the process data; collecting field processing data, quality data and processing cases, feeding the field processing data, the quality data and the processing cases back to the processing technology knowledge elements, evolving the processing technology knowledge elements, and finally constructing an evolutionary structured technology knowledge base and a technology resource base for airplane structural members and manufacturing processes;
2.1.2 For key processing characteristics and processing stages of typical structural members, establishing a relation structure tree of process knowledge and resources in a classified manner, so that a process knowledge base serves the process design and manufacturing process;
2.1.3 Dividing key processing characteristics and processing stages of parts, defining description specifications of process knowledge and process resources in each characteristic and processing stage by using a knowledge description language and the like, extracting key processing characteristics on a structural member, converting the key processing characteristics into vectors capable of identifying the processing characteristics, identifying simulation analysis characteristics, extracting analysis characteristic element sets, and establishing a structured process knowledge model;
2.1.4 Through a mapping method of a process knowledge element-structure data table, the process knowledge element with complex relation is converted into a simple process database table structure and table relation, and a database containing processing environment parameters and process quality parameters is additionally established to form a basic environment matched with the updating of the process knowledge base;
2.2 Generate a numerical control process based on a process template:
2.2.1 Obtaining the information of the typical structure of the airplane structural member, and obtaining a typical process template from a process knowledge base based on rule matching according to the obtained information;
2.2.2 According to the matched typical process template, reading process information from a process knowledge base, and making process decision of the typical structure of the aircraft structural member;
3) Establishing a process comprehensive simulation platform:
3.1 Analyzing data composition of professional process business in aircraft manufacturing, and forming a process model;
3.2 Analyzing the coordination relationship among business links in the process of preparing the process, determining the type of data requirement, defining the business coordination mode, and defining the view state of the process model through the technical state of the data;
3.3 The method includes the steps of) preparing a cooperation process aiming at an airplane process, identifying a service label, a service interface and a technical state, obtaining a data view, and calling a process design tool.
4) And (4) verifying the process design and the simulation standard of the typical structural member of the model airplane.
The process knowledge model in the step 2.1.3) specifically comprises the following steps:
the template process comprises the following steps: establishing process design elements of the type and specification of a cutter, a processing parameter set, the type and specification of a tool, which are involved in the processing process of a typical structural member, into a process template to inherit process design and analysis knowledge, so that a craftsman can obtain a process design result through simple selection;
and (3) regular process: inducing the experience mapping accumulated in the design and analysis of the machining process of the typical structural part to be converted into a process rule, and utilizing a process rule inference machine to realize the inference of the knowledge of the machining process;
example type process: extracting typical characteristics of typical process design and analysis examples as search conditions, and taking the process design and analysis examples as search results
Real-time working condition type process: and extracting process knowledge from the real-time manufacturing state, processing factors, equipment running state and quality state of the typical implementation model so as to process and analyze the large data of the implementation model.
The beneficial effects of the invention are as follows: the method has the advantages that the working standards of aviation digital design and process simulation are established, and the realization of intelligent manufacturing in design and process model definition and application is powerfully supported. By defining, associating and fusing various elements and attributes of different processes such as process design, machining and manufacturing, inspection and detection and the like, a system and a specification oriented to digital design, numerical control machining and process simulation are formed, so that the digital design and the machining process of the airplane machining structural part have clear structural model guidance, the randomness and the non-normalization of the traditional manufacturing process are obviously reduced, the sharing, reasoning and application of process knowledge are facilitated, and the spanning from a local model to a global model is promoted to be realized in the model-based airplane part manufacturing. The project combines the whole-process whole-element design with a process model and an advanced design and process knowledge base, generates the part numerical control machining process with high efficiency and high quality under the support of an evolvable typical process knowledge base, and is beneficial to overcoming the defects of the traditional numerical control process design through the guidance, simulation and standardization of the model and knowledge, and promotes the development of the design from an experience dependence type to a model/knowledge/simulation optimization drive direction. .
Drawings
FIG. 1: a flow chart of the whole process.
FIG. 2: and designing and processing a characteristic information model diagram.
FIG. 3: and a whole process whole element process data system block diagram.
FIG. 4: and (3) an aircraft process knowledge element mining and modeling schematic diagram.
FIG. 5: the numerical control process with the typical structure automatically generates a schematic diagram.
FIG. 6: the technical scheme of the part numerical control process optimization is shown.
Detailed Description
The method is shown in figure 1, and the whole process of realizing intelligent manufacturing is comprehensively described from four levels of standard establishment, knowledge base construction, application platform construction and example verification. The method specifically comprises the following steps:
1. airplane digital design/machining process simulation information integration standard system
1.1 machine design/Process simulation information integration definition standardization
The method aims at the overall process and all-element machining process model definition and the compilation of related machining method specifications, researches and designs the integrity definition of the construction method, process information and resource information involved in the process model construction, and carries out systematized, systematized and normalized information processing and expression. On the basis of the definition of the whole-process whole-element technological model system, the core contents of the processes, information, models, resources, methods and the like of the processing and detection of the airplane parts are analyzed, summarized and subjected to semantic standardization treatment to form a standard for guiding the whole-process whole-element technological model construction. The normative research is an application mode of a process modeling technology of typical parts of an airplane, which is formed aiming at the numerical control machining characteristics of aviation parts, is a high summary of relevant technologies in the part machining process, and is a bridge for converting theoretical research, basic technology and production application technology research into production application.
Aiming at the construction method of the whole-process whole-element process model system, a meta-model method is adopted for definition. First, a whole-process whole-element process model framework is defined, as shown in fig. 2. Relevant specifications are compiled on the basis of the definition of the process model of the whole process whole elements. The method comprises the steps of firstly aiming at the characteristics of airplane part processes and numerical control machining, absorbing beneficial experiences of companies such as Boeing and Airbus and the experiences accumulated by enterprise machining, simultaneously avoiding the problem that the traditional process model cannot support the whole part manufacturing process, summarizing a process modeling business mode according with the actual machining condition of an enterprise, then dividing objects described in specifications into a process class, an element class, a model class, a resource class and a method class respectively, dividing the objects into a process class, a numerical control process class, an emulation class, a detection class, a data acquisition class and an interface class in the aspect of the business faced by the specifications, dividing the objects into a machine tool class, a rule class, a tool class, a template class, a machining characteristic class, a machining method class, a process parameter class and a software and hardware system class in the aspect of a basic resource library, and establishing an incidence relation among the process, the model and the elements.
In fig. 2, the design and process processing characteristic information model:
preferably, the general features: part name, part code number, blank type, part overall dimension, part weight, production type, technical requirements and designer.
Preferably, the material characteristics are: material grade, material characteristics, main matrix structure, material variety and specification, use temperature and application, material heat treatment mode, surface treatment mode and the like.
Preferably, the shape characteristics comprise design information, process characteristics and associated information.
Preferably, the design information: design basis, positioning basis, design parameters, design rules and design requirements.
Preferably, the process features: machining method, size machining precision, surface roughness, form and position precision, machining requirement and the like.
Preferably, the association information: association type, attribute.
1.2 Whole-process full-element process model and database system framework
For multi-device cooperative processing, firstly, cooperative transmission elements of multiple devices are determined, machine tool device element information and device interface information from a basic manufacturing resource library related to process processing are defined, then, an association relationship between the multi-device cooperative elements and devices related in a part processing process is established, the association relationship comprises the contents of a process environment of manufacturing resources, an information transmission relationship between the devices, element association of manufacturing resource change to processing and manufacturing characteristics and the like, and a basis is provided for analysis of a process model in actual processing, as shown in fig. 3.
1.3 airplane digital design and machining process simulation information integration standard
The digital design and processing process of the airplane parts adopts information integration as a core and adopts a single product data source as a management means. The design model is used as a carrier, the design characteristics are associated with the processing characteristics, and a set of intelligent manufacturing-oriented airplane digital design/machining process simulation information integration standard system is established by a processing characteristic-driven automatic numerical control programming/simulation design and manufacturing integrated method, wherein the method comprises the following steps:
1.3.1 Digital design criteria for aircraft
Aiming at the characteristics of airplane digital product design, an IPDT design manual of the company is taken as a core, structural components are subjected to design characteristic decomposition through airplane function and performance analysis to form a primary design characteristic set, a design structure is subjected to machinability analysis, the machinability, cost controllability and quality accessibility under the constraints of structure, dimensional tolerance, geometric form and position tolerance and roughness are evaluated, the design characteristic is subjected to corresponding correction through processing characteristic decomposition of a processing object, and the relationship between the structure, the design characteristic and the processing characteristic is established. And forming a normalized design flow of the aircraft structural part based on the design characteristics, and providing functional requirements for supporting the development of a normalized characteristic modeling tool.
Summarizing and refining processing technology design knowledge aiming at a typical structure of an airplane, carrying out multi-view decomposition on a model view aiming at different processing characteristics and aiming at meeting technology expression clearness and detection convenience, establishing a multi-view incidence relation definition corresponding to 'view-characteristic-processing information labeling', forming a manufacturing information expression standard taking three-dimensional labeling as a core, and providing functional requirements for development and view management of a three-dimensional labeling tool.
The design characteristics and the processing characteristics of the structural parts of the airplane products have correlation, an airplane digital design information integration standard system is formulated, the structural design of airplane parts not only needs to meet the requirements of functions and performance, but also needs to meet the manufacturability requirements, the design characteristics and the manufacturing characteristics are expressed in a relevant mode, the manufacturing information is taken as a carrier by an MBD (Model Based Definition) Model, the characteristics are taken as a driving source for numerical control programming and simulation, and the airplane digital design standard is defined.
1.3.2 Aircraft digital process simulation standard
The aircraft structural member has a plurality of irregularly shaped features, such as boss features, hole series features, frame rib features, and the like. The processing technique is limited by the factors of workpiece material, workpiece structure size, machine tool conditions, tool selection and the like. The traditional knowledge mining and modeling method relying on keyword search cannot meet the requirements of intelligent numerical control programming and simulation of structural members. Therefore, by the conversion method from design characteristics to processing characteristics, a procedure model modeling standard, a numerical control programming flow standard and a numerical control processing process simulation flow standard are established, and a barrier from structural design to numerical control process design/simulation is opened.
And constructing a numerical control programming template of typical three-dimensional MBD processing characteristics and constructing a numerical control programming template library by various processing parameters required in programming. And establishing a numerical control programming reasoning rule based on the MBD processing characteristics, establishing mapping association with the corresponding three-dimensional processing characteristics, and finally forming a searchable and commonly used numerical control programming resource library around the MBD processing characteristics.
The method for converting the design characteristics into the processing characteristics is realized, and a process knowledge base with the processing characteristic model as a retrieval condition is established. And realizing automatic numerical control programming according to actual workpieces and processing conditions by matching processing characteristics. And then an intelligent numerical control programming flow standard facing the airplane machining structural member is formed.
As in fig. 3, the preferred criteria are: processing characteristic standard, process parameter standard, process rule standard, process example standard and manufacturing resource standard.
Knowledge base construction technology of' process integrated simulation platform
2.1 knowledge base construction technique
Dividing key processing characteristics and processing stages in the aircraft structural member manufacturing process, and compiling modeling specifications of basic manufacturing resources; further researching and mining potential rules in the process data and establishing various process knowledge models; and exploring a knowledge evolution technology of feeding back the field processing data, the quality data and the processing case accumulation to the processing technology knowledge element. And finally, an evolutionary structured process knowledge base and an evolutionary process resource base are constructed for the aircraft structural member manufacturing process.
And carrying out classification research on key machining characteristics and machining stages of the aircraft structural part manufacturing process, and analyzing the requirements of different machining characteristics of typical structural parts at different stages on manufacturing process knowledge and resources. A process knowledge example, a process template, a real-time working condition and the like are established through various channels such as manual input, interactive acquisition, full-automatic acquisition and the like. And developing a numerical control process knowledge base of typical machining characteristics for manufacturing a typical structural member. And excavating potential relations between the process design analysis knowledge model and the processing environment, the process factors and the quality. And forming an updating mechanism of the aircraft structural part process knowledge base. And the optimization of the manufacturing process is realized by combining the rule of the influence of the process factors such as tool abrasion, machine tool state, tool fixture force and the like excavated from the manufacturing big data on the quality of the workpiece.
And establishing a relation structure tree of process knowledge and resources by classification for key processing characteristics and processing stages of the key processing characteristics on the typical structural member. And (4) mining process knowledge from the accumulated process data, establishing a structural process knowledge element in a composite form, and further establishing a process knowledge base and a process resource base of the typical structural part of the airplane. And acquiring environmental parameters, process factors and quality inspection data of a processing site by using a multi-sensor technology, and mining a potential influence rule from the environmental parameters, the process factors and the quality inspection data so as to feed back and update a process knowledge base of a typical structural member. And analyzing the influence rule of the workpiece quality by combining the process factors such as tool wear, machine tool state, tool clamp force and the like excavated from big data, and realizing the optimization of the manufacturing process, so that the process knowledge base serves the process design and the manufacturing process.
The manufacturing process knowledge of the aircraft structural part is derived from process experience, process specifications, process regulations and process simulation analysis data which are daily accumulated by enterprises. And dividing key processing characteristics and processing stages of the parts, and defining description specifications of process knowledge and process resources in each characteristic and processing stage by using knowledge description languages and the like. Further, key machining features on the structural member, such as frame rib features, hole series features, annular features, etc., are extracted and converted into vectors that can identify the machining features. And identifying simulation analysis features and extracting an analysis feature element set. The structured process knowledge model is established through various ways. The concrete classification is as follows:
template type process knowledge: the process design elements such as the type and specification of a cutter, a processing parameter set, the type and specification of a tool and the like involved in the processing of a typical structural member are established into a template, and the process template shown in figure 4 inherits the process design and analysis knowledge, so that a process design result can be obtained by a technician through simple selection.
Rule-class process knowledge: summarizing the empirical mapping accumulated in the design and analysis of the machining process of the typical structural part to be converted into process rules, such as: the process rules include datum priority, primary and secondary, coarse and fine. And (4) realizing knowledge inference of the processing technology by using a process rule inference machine.
Example type process knowledge: extracting typical characteristics of typical process design and analysis examples as retrieval conditions, such as: typical hole machining process knowledge, typical thread machining process knowledge and typical key slot machining process knowledge, and process design and analysis examples serve as retrieval results.
Real-time working condition type process knowledge: and extracting process knowledge from the real-time manufacturing state, processing factors, equipment running state and quality state of the typical implementation model so as to process and analyze the big data of the implementation model.
The process knowledge elements with complex relationships are converted into simple structured process database table structures and table relationships by a 'process knowledge element-structure data table mapping' method. And extracting and converting the data from the simple and structured process database into a knowledge packet suitable for the current knowledge requirement, and providing the knowledge packet for the rapid design and analysis of the process. In addition, a database containing processing environment parameters and process quality parameters is established to form a basic environment matched with the updating of the process knowledge base.
2.2 numerical control technology generation method based on technology template
Firstly, obtaining information such as products, part groups, material attributes and typical attributes of typical structures of airplane structural parts, obtaining typical process templates from a process knowledge base based on rule matching according to the obtained information, screening by a user if a plurality of templates are matched, and modifying screening conditions by the user to re-match if the process templates are not matched.
And then, reading process information from a process knowledge base according to the matched typical process template, and making process decision of the typical structure of the aircraft structural member. And for general procedures, procedure contents in the process template are copied into new process information, and for numerical control machining procedures, machine tool information is screened and step decision is made. In the step decision, matched structural features are screened, a processing element object aiming at the features is created, a typical structure model covering the whole process of numerical control processing is constructed, and the automatic decision of the process level, the process level and the step level of the typical structure is completed. The method for automatically generating the numerical control process of the typical structure of the aircraft structural part is shown in fig. 5, and the specific method comprises the following steps of performing navigation revision on process information of automatic decision making, and editing information of procedures, process steps, tools and the like, wherein the method comprises the following steps:
a, generating an individualized characteristic/structure numerical control process based on three-dimensional model retrieval:
firstly, a three-dimensional model retrieval technology of manufacturing semantics is applied, geometric similarity and manufacturing semantics similarity comparison are carried out on a three-dimensional model of a part to be manufactured and three-dimensional models of parts in a numerical control process example library, and reusable similar features/structures in the example library are automatically retrieved; and then, automatically extracting reusable numerical control process parameters from the numerical control process example library by applying a numerical control process correlation analysis technology with similar characteristics/structures.
b, generating the personalized feature/structure numerical control process based on progressive learning:
and for the personalized features/structures which cannot be retrieved in section 2.3 of the method, generating the numerical control process by process personnel through interactive design, and storing the result into a numerical control process example library. When the system encounters such personalized features/structures again, the corresponding numerical control process can be automatically retrieved and reused by applying the method section 2.3.
With the continuous enrichment of knowledge bases and numerical control process example bases, the proportion of realizing automatic programming of a process design system is higher and higher, and the proportion of interactive programming is smaller and smaller, so that the automation and intelligence degrees of numerical control programming are continuously improved.
c, part numerical control process optimization technology based on group intelligence:
firstly, the numerical control process design result is used for selecting feasible processing resources including a machine tool (machine tool type, load and maximum processing range), a cutter (cutter type and cutter radius), a clamp and the like according to the actual processing environment.
And then, establishing a part numerical control machining process optimization mathematical model according to the selected machining resources and the numerical control machining information thereof, wherein the technical indexes mainly comprise machine tool cost, cutter cost, machine tool conversion time, cutter replacement time, clamping cost and the like.
And finally, aiming at the uncertainty problem of the manufacturing resources, adopting a genetic-simulated annealing mixed group intelligent optimization algorithm to carry out extended solution on the numerical control process planning and optimization mathematical model based on the static resources to generate an optimal part numerical control machining process scheme. The specific scheme is shown in figure 6.
3 'comprehensive process simulation platform' tool platform
Firstly, analyzing data composition of multi-professional process services in aircraft manufacturing, and constructing a flexible process model covering each stage of process preparation by taking a full three-dimensional MBD model as a process data carrier. Extracting key data in multi-professional process business, and constructing gradually enriched flexible process models according to the structural form of the holographic process model, wherein the flexible process models comprise contents such as a process overall scheme, a process route, process steps, a process model, a cutter bit file, an NC program, a process simulation model, a process document and the like;
secondly, analyzing the cooperative relationship among a plurality of complex and interconverted business links in the process preparation process, such as process planning, process scheme, tool design, numerical control programming, process simulation, process modification optimization and the like, determining the type of data requirement by identifying the business type, defining the business cooperative mode through a process design business interface, and defining the view state of a process model through a data technology state;
and finally, aiming at the aircraft process preparation cooperative process, identifying the service label, the service interface and the technical state in the cooperative process of product design-process design-manufacturing service, and acquiring a data view which accords with the current professional process design activity to realize the calling of a corresponding process design tool.
The platform realizes functions: scanning part characteristics, recognizing tolerance, generating a process scheme, matching a cutter, generating a processing structure tree, automatically generating a numerical control program, simulating the program and verifying a result 8.
Software product:
a 'digital design/numerical control programming and simulation of airplane machine structural parts' comprehensive simulation platform;
b knowledge base related to digital design and numerical control processing (typical feature base of aeronautical machine and parts, knowledge base of aeronautical machine and numerical control processing, simulation resource base of aeronautical machine and numerical control processing, etc.)
4. Simulation platform verification
1 set of application platform prototype system facing to the aircraft typical structural member process design/simulation standard is developed. The technical design/simulation standard development application verification of frame, beam and rib type typical parts of the airframe is respectively carried out in a numerical control production workshop of a middle-aviation Shenfei civil aircraft and a machining workshop: and establishing no less than 200 typical part process cases facing the machining.
4.1 Authentication device):
4.1.1 Hardware): a five-coordinate numerical control machine tool; associating a numerical control workstation;
4.1.2 Software):
CATIA V5R18 and above version design software (should contain FTA and NCM modules);
the comprehensive simulation platform comprises a comprehensive simulation platform for digital design/numerical control programming and simulation of airplane and machine structural components;
designing a digital-analog quality detection system by adding parts to an aircraft;
adding a typical feature library for an aircraft;
adding a numerical control machining process knowledge base for the aircraft;
an aircraft adds a numerical control machining process simulation resource library.
4.2 A verification method:
selecting a part of a certain type of airplane as a reference standard, designing the part according to standard requirements, and performing data perfection through a series of software required by verification. The design links only need a designer to use a knowledge base to rapidly and accurately model, the quality control of all links in the research and development process is automatically detected through software, the problems are fed back to the designer to be modified and perfected, the system automatically generates manufacturable numerical control codes after the design digital analogy is frozen, the numerical control codes can be automatically read and processed by using a conventional five-axis numerical control machine, the processed parts meet the quality requirements of aviation equipment, and the quality, period, cost and other problems are compared and analyzed with the selected parts.
Selecting integral structural machined parts with comprehensive characteristics of the large nationality airplane, inputting the integral structural machined parts into intelligent automatic programming software completed by the user for identification and association, and applying software operation and calling of a database to complete automatic programming of numerical control parts. And generating a complete tool cutting path, generating a tool and generating a G code program for simulation. And inputting the G code program which passes the simulation verification into a numerical control five-coordinate milling machine for processing and manufacturing. And (4) checking whether the manufactured machined part meets the manufacturing basis of drawings, figures and the like. Therefore, whether the programming flow database and the intelligent automatic programming software are successful or not is verified.
Claims (2)
1. The method for the technological programming simulation of the intelligent manufacturing-oriented product of the aircraft machining part is characterized by comprising the following steps: the method comprises the following steps:
1) The method comprises the following steps of (1) establishing an airplane digital design and machining process simulation information integration standard system:
1.1 Design and process simulation information integration definition standardization establishment:
1.1.1 Compiling a machining process model definition and related machining method specifications facing to the whole process and whole elements to obtain the integrity definition of a construction method, process information and resource information related to the design and process model construction, and carrying out systematic, systematic and normalized information processing and expression;
1.1.2 On the basis of the definition of the whole-process whole-element process model system, analyzing the core content of the processing and detection of the airplane parts, and performing semantic standardization processing to form a standard for guiding the whole-process whole-element process model construction;
1.1.3 Aiming at the construction method of the whole-process whole-element process model system, the element definition is carried out by adopting an element model modeling method: compiling a relevant specification on the basis of the definition of a process model of all elements in the whole process, and establishing an incidence relation among the process, the model and the elements;
1.2 Establishing a whole-process whole-element process model and a database system framework: aiming at multi-equipment cooperative processing, firstly determining cooperative transmission elements of multiple equipment, defining machine tool equipment element information and equipment interface information from a basic manufacturing resource library related to process processing, then establishing an incidence relation between the multi-equipment cooperative elements and equipment related to the part processing process, and providing a basis for analyzing a process model in actual processing;
1.3 Obtaining the integration standard of the digital design and machining process simulation information of the airplane: establishing an intelligent manufacturing-oriented airplane digital design and machining process simulation information integration standard system according to the design model and the association relationship between the design characteristics and the machining characteristics obtained in the steps 1.1) -1.2);
2) Knowledge base construction technology:
2.1 Build a knowledge base:
2.1.1 Dividing key processing characteristics and processing stages in the manufacturing process of the airplane structural member, and compiling modeling specifications of basic manufacturing resources; establishing a process knowledge model in a classification manner according to potential rules in the process data; collecting field processing data, quality data and processing cases, feeding the field processing data, the quality data and the processing cases back to the processing technology knowledge elements, evolving the processing technology knowledge elements, and finally constructing an evolutionary structured technology knowledge base and a technology resource base for airplane structural members and manufacturing processes;
2.1.2 For key processing characteristics and processing stages of typical structural members, establishing a relation structure tree of process knowledge and resources in a classified manner, so that a process knowledge base serves the process design and manufacturing process;
2.1.3 Dividing key processing characteristics and processing stages of parts, defining description specifications of process knowledge and process resources in each characteristic and processing stage by using a knowledge description language, extracting key processing characteristics on a structural member, converting the key processing characteristics into vectors capable of identifying the processing characteristics, identifying simulation analysis characteristics, extracting analysis characteristic element sets, and establishing a structured process knowledge model;
2.1.4 Through a process knowledge element-structure data table mapping method, the process knowledge elements with complex relationships are converted into simple structured process database table structures and table relationships, and a database containing processing environment parameters and process quality parameters is additionally established to form a basic environment matched with process knowledge base updating;
2.2 Generate a numerical control process based on a process template:
2.2.1 Obtaining the typical structure belonging information of the aircraft structural part, and obtaining a typical process template from a process knowledge base based on rule matching according to the obtained information;
2.2.2 According to the matched typical process template, reading process information from a process knowledge base, and making process decision of the typical structure of the aircraft structural member;
3) Establishing a process comprehensive simulation platform:
3.1 Analyzing data composition of professional process business in aircraft manufacturing, and forming a process model;
3.2 Analyzing the coordination relationship among business links in the process of preparing the process, determining the type of data requirement, defining the business coordination mode, and defining the view state of the process model through the technical state of the data;
3.3 The method comprises the steps of) preparing a cooperative process aiming at an airplane process, identifying a service label, a service interface and a technical state, acquiring a data view, and calling a process design tool.
4) And (4) verifying the process design and the simulation standard of the typical structural member of the model airplane.
2. The method for intelligently manufacturing a product process programming simulation of an aircraft add-on as claimed in claim 1, wherein: the process knowledge model in the step 2.1.3) specifically comprises the following steps:
the template process comprises the following steps: establishing process design elements of the type and specification of a cutter, a processing parameter set, the type and specification of a tool, which are involved in the processing process of a typical structural member, into a process template to inherit process design and analysis knowledge, so that a craftsman can obtain a process design result through simple selection;
and (3) regular process: inducing the experience mapping accumulated in the design and analysis of the machining process of the typical structural part to be converted into a process rule, and utilizing a process rule inference machine to realize the inference of the knowledge of the machining process;
example type process: extracting typical characteristics of a typical process design and analysis example as a retrieval condition, and taking the process design and analysis example as a retrieval result;
real-time working condition type process: and extracting process knowledge from the real-time manufacturing state, processing factors, equipment running state and quality state of the typical implementation model so as to process and analyze the large data of the implementation model.
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