CN113868725B - Three-dimensional process procedure guiding method and system based on structured knowledge - Google Patents
Three-dimensional process procedure guiding method and system based on structured knowledge Download PDFInfo
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Abstract
The invention discloses a three-dimensional process procedure guiding method and a system based on structured knowledge, wherein a process and a working step are established under a process model structure tree; manufacturing resource information and inspection information of a process or a working step are obtained, and typical geometric features with similarity larger than a set threshold value are selected from a model feature library; inserting the typical geometric features into a process model structure tree and attaching the typical geometric features to the model geometry, determining the size of the typical geometric features, and completing the construction of the model geometric features; and acquiring process symbols of the geometric characteristics of the model based on manufacturing resource information, inspection information or a structured process knowledge base of the working procedures or the working steps. The method establishes an enterprise-level structured process knowledge base reflecting the logical relationship of process design, realizes the automatic construction of the three-dimensional process regulation design process, and improves the process regulation design efficiency.
Description
Technical Field
The invention relates to a three-dimensional process procedure guiding method and a three-dimensional process procedure guiding system based on structured knowledge, and belongs to the technical field of product three-dimensional digitization.
Background
In order to meet the requirements of enterprise product research and development and production, the process design is used as a core link for linking product design and production and manufacture, and needs to be cooperated with the product design to output complete process information for production and manufacture. The three-dimensional process design takes a three-dimensional model as an information carrier, and realizes process design and transmission in a three-dimensional environment.
The traditional process design is carried out in the form of documents and tables, the process information expression is incomplete, and the process intention is not obvious; the three-dimensional process design process needs to output process files to guide production in a certain period, however, process personnel construct a process route in a three-dimensional environment, need to manually add processes and steps one by one, manually fill in process information such as a work center corresponding to each process, and the like, the design process is complicated, and information expression is easy to make mistakes. When the model features are constructed, a designer needs to mechanically construct the machining features according to the working procedures/working steps, so that the feature construction is long in time consumption and low in efficiency. Meanwhile, in the aspect of model marking, marking symbols cannot be directly generated, the symbol information needs to select parameter information one by one, the symbol cannot be quickly and accurately generated and marked, and the workload and the working difficulty are directly increased for a process designer. The development of the rapid design based on the three-dimensional process is the basis and the direction of the digitization and the intelligent process, the construction of the three-dimensional process procedure is one of the key technologies, the bottleneck problem of the digitization process design which needs to be solved rapidly and automatically is how to construct the three-dimensional process procedure, and no related method and tool are available for reference at present.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a three-dimensional process procedure guiding method and a system based on structured knowledge, wherein a structured process knowledge base is established based on a process type base and a resource database, and the structure and the hierarchy of the structured process knowledge base are defined; secondly, establishing a three-dimensional process rule design flow and various service type data selection rules facing a three-dimensional structured process design management platform, and establishing a logic mapping relation table among the process design flow, process services, tool sets and manufacturing resources; thirdly, acquiring data and resources designed by the process procedures based on the driving of the structured process knowledge base and the logical mapping relation table, extracting relevant knowledge classification such as machining, welding and assembling from the resource database and pushing the knowledge classification to process personnel; finally, the user quickly selects the process resources, the process step resources, the inspection information and the like, the guided design of the process rules is completed, and the guided design is quickly transmitted to the production and manufacturing stage, so that the efficiency and the accuracy of the three-dimensional process rule design are greatly improved, the design error rate is reduced, meanwhile, the traditional process knowledge is structured, the repeated use of data is realized, the application value of the data is improved, and the loss of expert knowledge is effectively reduced.
In order to achieve the above object, the present invention provides a three-dimensional process procedure guided method based on structured knowledge, comprising:
according to the process type of the part, establishing a process under a process model structure tree, and establishing a process step in a mode of adding a node under the process;
acquiring manufacturing resource information and inspection information of a process or a process step;
selecting typical geometric features with similarity greater than a set threshold from a model feature library according to manufacturing resource information and inspection information of a process or a process step;
inserting the typical geometric features into a process model structure tree and attaching the typical geometric features to the model geometry, determining the size of the typical geometric features, and obtaining the geometric features of the model;
the process symbols for the geometric features of the model are determined based on manufacturing resource information, inspection information, or a structured process knowledge base for the process or step.
Preferably, the structured process knowledge base is constructed comprising:
according to the process design refinement, classifying the process design resources into a process level or a process step level in a tree shape under a process model structure tree, establishing a networked association relationship between the process design resources, and establishing a structured process knowledge base, wherein the structured process knowledge base comprises a process type, a data type and a data relationship base;
dividing the process types into machining process, sheet metal process, welding process and assembling process according to the subject direction, and dividing the data types into a manufacturing resource library and a manufacturing process library;
and constructing a process design logic relation of the manufacturing resource library and the manufacturing process according to the basic attribute logic relation table, the additional attribute logic relation table and the other attribute logic relation tables to obtain a data relation library.
Preferentially, according to the process type of the part, a process is created under the process model structure tree, and a process step is created under the process in a mode of adding nodes, wherein the process step comprises the following steps:
according to the process type of the part, a process is created in a mode of adding nodes under a process model structure tree, the name of the created process is selected from the process name fed back by a structured process knowledge base, and the process step is established in a mode of adding nodes under the new process.
Preferentially, when a plurality of working procedures are created, the sequence numbers of the working procedures are increased by 10 orders of magnitude;
the default name of the step is defined as '10.1 new step', and the step numbers are increased by 0.1.
Preferentially, the manufacturing resource information and the inspection information of the working procedure or the working step are automatically acquired, or the manufacturing resource information and the inspection information of the working procedure or the working step are selected by a user;
the method for automatically acquiring the manufacturing resource information and the inspection information of the process or the process step or selecting the manufacturing resource information and the inspection information of the process or the process step by a user comprises the following steps:
selecting basic attributes: automatically acquiring and displaying design options of manufacturing resource information stored in a manufacturing resource library or design options of manufacturing process information stored in the manufacturing resource library to an attribute column of a process during process design or process step design, automatically filling the attribute column of the process or process step if the attribute value of the manufacturing resource information of the process or process step is unique, and otherwise, selecting the attribute value of the manufacturing resource information of the process or process step by a user;
selecting an additional attribute: when the process including the additional attribute is a standard process, directly and automatically filling the additional attribute of the standard process into an attribute column of the process or the process step, otherwise, selecting the additional attribute by a user;
and selecting the inspection information of the step according to the structured process knowledge base.
Preferentially, the additional attributes comprise the work time quota, the process requirements, the tooling and the step content;
the inspection information comprises inspection items, inspection means, inspection methods, inspection frequency and technical requirements;
the inspection items include inspection means, inspection methods and inspection frequency.
Preferably, the process notation of the geometric features of the model is obtained based on manufacturing resource information, inspection information or a structured process knowledge base of the process or step, including:
the process symbols of the geometric characteristics of the model comprise the number of the same parts, a work center, equipment, a process method, process parameters and auxiliary materials;
the working center and the equipment directly inherit the manufacturing resource information and the inspection information of the working procedure or the working step, and the process method, the process parameters and the auxiliary materials are extracted item by item from the design options of the displayed structured process knowledge base.
Structured knowledge based three-dimensional process specification guided design system comprising:
the process route planning module is used for creating a process under the process model structure tree according to the process type of the part and creating a process step in a mode of adding a node under the process;
the system integration module is used for automatically acquiring manufacturing resource information and inspection information of a process or a process step, or a user selects the manufacturing resource information and the inspection information of the process or the process step;
the process/step geometric feature design module is used for selecting typical geometric features with similarity larger than a set threshold from the model feature library according to manufacturing resource information and inspection information of the process or the step, inserting the typical geometric features into a process model structure tree and attaching the typical geometric features to the model geometry, determining the size of the typical geometric features and obtaining the model geometric features;
and the process symbol design module is used for obtaining the process symbols of the geometric characteristics of the model based on manufacturing resource information, inspection information or a structured process knowledge base of the working procedures or the working steps.
Preferably, the system integration module comprises:
the process/step basic attribute design module is used for automatically acquiring and displaying design options of manufacturing resource information stored in a manufacturing resource library or design options of manufacturing process information stored in the manufacturing process library to an attribute column of a process during process design or step design, automatically filling the attribute column of the process or step if the attribute value of the manufacturing resource information of the process or step is unique, and otherwise, selecting the attribute value of the manufacturing resource information of the process or step by a user;
and the process additional attribute design module is used for directly and automatically filling the additional attributes of the standard process into the attribute column of the process or the process step when the process comprising the additional attributes is the standard process, otherwise, the user selects the additional attributes and is used for selecting the inspection information of the process step according to the structured process knowledge base.
The invention achieves the following beneficial effects:
the method greatly improves the efficiency and the accuracy of the three-dimensional process rule design, establishes the logical relationship among the enterprise-level process resource structured knowledge base and the data and the driving relationship of the structured process design, realizes the automatic construction of the three-dimensional process rule design process, improves the process rule design efficiency and reduces the design error rate.
Firstly, establishing a structured process knowledge base, and defining the structure and the hierarchy of the structured process knowledge base; secondly, establishing a process design logic relation between the manufacturing process information and the manufacturing resource information; thirdly, acquiring manufacturing process information and manufacturing resource information based on a structured process knowledge base and a process design logical relationship, extracting relevant machining, welding, assembling and other knowledge from the manufacturing process base, and pushing the knowledge to process personnel in a classified manner; finally, the user quickly selects the design options of the manufacturing process information, the design options of the manufacturing resource information, the inspection information and the like, completes the guided design of the process procedure and quickly transmits the guided design to the production and manufacturing stage;
the manufacturing resources in the manufacturing resource library are automatically acquired during process design, the manufacturing process information is automatically acquired during process step design, and along with the deepening of the process design, the selectable range of design options fed back to the three-dimensional structured process design management platform by the data relation library is gradually reduced according to the process design logical relation, so that the structured process design is guided to be quickly completed.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a schematic illustration of a process route planning of the present invention;
FIG. 3 is a schematic diagram showing the detailed design of the process/step of the present invention;
FIG. 4 is a schematic diagram of a structured process knowledge base in accordance with the present invention;
FIG. 5 is a relational diagram of a base attribute logical relationship table, an additional attribute logical relationship table, and other attribute logical relationship tables in the present invention;
FIG. 6 is a schematic view of a process symbol according to the present invention.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A three-dimensional process procedure guided method based on structured knowledge, as shown in fig. 1, comprising the steps of:
1. defining a structured process knowledge base and a model feature base
Firstly, according to the process design refinement, the process design resources are tree-like classified to a process level or a process step level under a process model structure tree, the process model structure tree can adopt an assembly process structure tree in the prior art to establish a networking incidence relation among the process design resources, and a structured process knowledge base is constructed. The structured process knowledge base includes a process type, a data type, and a data relationship base. The networked association relationship refers to an association relationship among tools, auxiliary materials, equipment, process methods and the like, for example: plant code this category of data, 2013 and 2015; the data of the work center comprises XZ001, XZ002 and XZ 003; the equipment numbers and names adopted by the equipment to finish the procedure are the welding gun 01, the welding gun 02 and the welding gun 03; the correlation is therefore "2013-XZ 001-torch 01, torch 02". The apparatus also includes a number XZ00755 tightening machine, a number YJY00865 welding robot, and the like.
The model geometry is a process model automatically generated by downloading a product design model, belongs to an original model, and needs to be modified or endowed with characteristics.
The process design refinement refers to the number of steps divided in the processing process of a set of complete processing technology and the specific content of each processing step, for example, an irregular-shaped blank workpiece needs to be processed into a circular workpiece with a hole, only one process is needed under the condition of a tool, and two processes of cutting and drilling are needed under the condition of no tool.
First, a structured process knowledge base is defined as a three-level structure of process types, data types, and data relationships. Secondly, dividing the process types into four types of machining process, sheet metal process, welding process and assembling process according to the subject direction; thirdly, dividing the data types into a manufacturing resource library and a manufacturing process library according to the process design process; constructing a manufacturing resource library and a process design logical relation of a manufacturing process according to the basic attribute logical relation table, the additional attribute logical relation table and the other attribute logical relation tables to obtain a data relation library; the data relationships represent the corresponding process design logical relationships of individual data and other related data in the structured process knowledge base.
The subject direction refers to the specific research and development direction of the specialty, and the fusion process business can be divided into a machining process, a sheet metal process, a welding process and the like.
The model feature library effectively combines typical geometric features (such as holes with the size of 4 multiplied by 20mm, V-shaped grooves and U-shaped crevasses) constructed on the three-dimensional model in the process of process design by inductive summary to form a group or a set; the method is convenient for direct selection of the process, automatically constructs the characteristics and avoids the occurrence of the condition of manually selecting the command.
2. Library of carding manufacturing resources and manufacturing process library
As shown in fig. 4, the manufacturing resource library includes factory codes, processes, work centers, production lines, machining centers, equipment, standard process information, tools, and auxiliary materials. Plant codes, i.e., numbers defined for molecular companies, such as 2013 and 2015; work centers, i.e., production plants within a company, such as 001 machining plants and 002 welding plants; the processing center is a unit for producing semi-finished products and belongs to a processing unit below a production line;
the manufacturing process library comprises an assembly method, assembly constraints, assembly equipment and assembly parameters which are mutually related; the manufacturing process library also includes typical process, edge tool and inspection information; the inspection information is to inspect a certain key parameter of a certain process, such as an inspection item, an inspection means, an inspection method, an inspection frequency and a control means.
The typical process is a complete set of processes summarized by companies for most products, such as: a certain production line under an assembly workshop consists of fifteen stations, namely a station, … and a station, wherein each station comprises a plurality of working procedures/steps, but the relative assembly content of each station is fixed, so that the process is called as a typical process.
The edge measuring tool is a combination of a cutting tool and a measuring tool, wherein the cutting tool comprises a turning tool, a drill bit, a milling cutter, a reamer, a screw tap, a die and the like, and the measuring tool is a measuring tool and comprises a caliper, a measuring tape, a micrometer, a feeler gauge and the like.
Machining methods, i.e. methods used in the formation of semi-finished or finished products from blanks, such as turning, milling, tapping, double-layer welding, single-side welding, impact pressing, liquid nitrogen cold-shrinking, etc.
Machining parameters, i.e. the type of detailed parameters involved under each machining method, such as welding current, welding voltage, gas flow, rotational speed, cutting depth, feed, pressure and tightening torque, etc.; the cutter parameters, namely detailed parameters of a certain cutter, such as the information of a main deflection angle of a milling cutter, the radius of a cutter head and the like;
3. analyzing the process data and establishing various data selection rules;
step one, the process data comprises a plurality of production lines corresponding to the working centers, the production lines correspond to a plurality of processing centers, different methods correspond to different tools, different tools correspond to different parameters, structured process data is formed, and various data selection rules are obtained.
Step two: integrating a three-dimensional process procedure guiding type design platform with a structured process knowledge base, automatically acquiring manufacturing resource information in a manufacturing resource base during process design, and automatically acquiring manufacturing process information in the manufacturing process base during process step design;
with the deepening of the process design, the structured process knowledge base is limited by the nesting relation of data, namely the networked incidence relation mentioned in the step one, and is fed back to the three-dimensional process design: manufacturing resources and manufacturing process knowledge selected in the design process are presented to a user in an option mode for selection, such as a work center, equipment, auxiliary materials and tools, the selectable range is gradually reduced, and the structured process design is guided to be completed quickly.
4. Process rule automatic construction based on structured process knowledge base in three-dimensional environment
The three-dimensional process procedure design is to respectively carry out process route planning and detailed process step design based on a process model in a three-dimensional environment.
Determining the process type of the part, and creating a procedure in a mode of adding nodes under a process model structure tree;
and establishing a process step in a mode of adding a new node under a new process to obtain a process route plan.
The process route planning is to determine the process type of the parts according to task division; planning a process route according to the actual process of the part, wherein the process route is a process from a blank to a semi-finished product or a finished product, and establishing the working procedures/steps of turning, milling, drilling and polishing, and then assisting with manufacturing resources and process methods to finally form a set of process route.
Fig. 2 is a flow chart of a process route planning method based on a structured process knowledge base, which includes:
step S202, under a process rule structure tree, establishing a process in a mode of adding nodes, and selecting a process name;
step S204, the default name of the process is defined as '10 new processes', and when a plurality of processes are created, the process serial numbers are increased by 10 as the order of magnitude; the name of the new process is fed back from the structured process knowledge base to the process name of the design system for quick selection.
Step S206, under each process node, namely the process model structure tree, the first-level node is the process node, and the second-level node is the process step node and is created by the user.
And planning the process steps under the process model structure tree, creating the process steps in a mode of adding nodes, and quickly naming the process step names.
Step S208, the default name of the step is defined as '10.1 new step', and the serial number of the step is increased or decreased by taking 0.1 as the order of magnitude; and finishing the process step naming based on the process and model characteristics.
The set of model features, i.e. geometric, labeling and dimensional information of the three-dimensional process model, e.g. length =4m, stretching, rotation, array, holes and threads.
The process symbol is to express part of the machining process information including information of the number of machining objects, the machining method, the work center, the equipment type, the cutting amount, the cutting parameter, the cutting fluid, and the like by combining a plurality of flexible code segments, as shown in fig. 6.
Under the process step node, the structured design of the inspection information is automatically completed by selecting the information of the inspection items and the like one by one, assisting the feedback of the structured process knowledge base and limiting the range of the structured process knowledge base.
And then, constructing model features facing the process/work step, extracting similar typical geometric features from a model feature library under the process or work step nodes, inserting a process model structure tree and attaching the process model structure tree to the model geometry, and completing the construction of the model geometric features by inputting dimensions.
In the process symbol, the work center and the work equipment directly inherit the process/the process step, and the process method, the process parameters, the auxiliary materials and the like are extracted item by the design options acquired and displayed in the structured process knowledge base to guide the completion of the process symbol design.
The basic attribute logic relationship table is a logic relationship defined for basic information such as standard procedures, equipment, factory information, workshops, production lines, work centers, station information and assembly methods, the additional attribute logic relationship table is a logic relationship defined for man-hour quota, process requirements, tools, process parameters, process step contents, inspection information and the like, and the other attribute logic relationship tables are logic relationships defined for assembly symbols, some information added for special products/custom products, such as random files, maintenance manuals and the like, and the attached diagram is shown in fig. 5.
The three-dimensional process procedure guided design system based on the structured knowledge adopts the method, and comprises the following steps:
the process route planning module is used for creating a process under the process model structure tree according to the process type of the part and creating a process step in a mode of adding a node under the process;
the system integration module is used for automatically acquiring manufacturing resource information and inspection information of a process or a process step, or a user selects the manufacturing resource information and the inspection information of the process or the process step;
the process/step geometric feature design module is used for selecting typical geometric features with similarity larger than a set threshold from the model feature library according to manufacturing resource information and inspection information of the process or the step, inserting the typical geometric features into a process model structure tree and attaching the typical geometric features to the model geometry, determining the size of the typical geometric features and obtaining the model geometric features;
and the process symbol design module is used for obtaining the process symbols of the geometric characteristics of the model based on manufacturing resource information, inspection information or a structured process knowledge base of the working procedures or the working steps.
A system integration module comprising:
the process/step basic attribute design module is used for automatically acquiring and displaying design options of manufacturing resource information stored in a manufacturing resource library or design options of manufacturing process information stored in the manufacturing process library to an attribute column of a process during process design or step design, automatically filling the attribute column of the process or step if the attribute value of the manufacturing resource information of the process or step is unique, and otherwise, selecting the attribute value of the manufacturing resource information of the process or step by a user;
and the process additional attribute design module is used for directly and automatically filling the additional attributes of the standard process into the attribute column of the process or the process step when the process comprising the additional attributes is the standard process, otherwise, the user selects the additional attributes and is used for selecting the inspection information of the process step according to the structured process knowledge base.
The working hour quota, i.e. the time quota, means the working time necessary for completing a unit qualified product under the condition of normal and reasonable use of machinery, for example, all bolts for assembling a pneumatic system of a vehicle chassis are defined as a working procedure, the time for completing the working procedure needs 0.8h, so the working hour quota of the working procedure is 0.8 h;
the process requirements, namely the detailed contents of the working procedures, such as the working procedure 'splicing', specifically comprise the following requirements: assembling the sequence 1 and the sequence 2 into a point assembly;
a tooling, i.e., a short name of process equipment, such as a certain model of welding fixing base and a certain model of assembling upright post;
the content of the process step is the detailed content of each process step under the process step node, for example, the pipeline assembly of a 10.1 hydraulic valve is used for connecting an oil port pipeline on a valve body, screwing and marking; and 10.2, arranging hydraulic valve pipelines, wherein the other ends of the hydraulic valve pipelines are orderly arranged behind the operating handle. The inspection means is means or tools for inspecting a certain item, and the means or tools comprise visual inspection, a straight steel ruler, a torque wrench and the like.
The terms in the present invention have the following meanings:
the inspection method is a method and steps adopted for inspecting a certain project, and comprises the step of observing whether lubricating grease overflows from the sealing position of a certain supporting plane, wherein the overflow is qualified. And (5) checking by using a torque wrench, and determining that the numerical value on the display screen is qualified when the numerical value is in a specified range.
The checking frequency is the checking frequency; e.g., 3/lot, 4/lot;
the technical requirements include no burr on the surface after grinding and no obvious deformation after welding.
A work center, i.e., a production workshop within a company, such as a 001 machining workshop and a 002 welding workshop;
the processing methods, i.e. the working methods, used during the formation of the semifinished or finished products from the blank, such as turning, milling, tapping, double-layer welding, single-side welding, impact pressing and cold shrinking with liquid nitrogen.
The process parameters, i.e. the type of detailed parameters involved under each process method, are, for example, welding current, welding voltage, gas flow, rotational speed, depth of cut, feed, pressure and tightening torque.
Auxiliary materials are auxiliary materials such as welding wires, cutting fluid, lubricating oil, gaskets and the like.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The three-dimensional process procedure guiding method based on the structured knowledge is characterized by comprising the following steps:
according to the process type of the part, establishing a process under a process model structure tree, and establishing a process step in a mode of adding a node under the process;
acquiring manufacturing resource information and inspection information of a process or a process step;
selecting typical geometric features with similarity greater than a set threshold from a model feature library according to manufacturing resource information and inspection information of a process or a process step;
inserting the typical geometric features into a process model structure tree and attaching the typical geometric features to the model geometry, determining the size of the typical geometric features, and obtaining the geometric features of the model;
determining process symbols of the geometric features of the model based on manufacturing resource information, inspection information or a structured process knowledge base of the process steps or the process steps;
constructing a structured process knowledge base comprising:
according to the process design refinement, classifying the process design resources into a process level or a process step level in a tree shape under a process model structure tree, establishing a networked association relationship between the process design resources, and establishing a structured process knowledge base, wherein the structured process knowledge base comprises a process type, a data type and a data relationship base;
dividing the process types into machining process, sheet metal process, welding process and assembling process according to the subject direction, and dividing the data types into a manufacturing resource library and a manufacturing process library;
constructing a manufacturing resource library and a process design logical relation of a manufacturing process according to the basic attribute logical relation table, the additional attribute logical relation table and the other attribute logical relation tables to obtain a data relation library;
according to the process type of the part, a process is established under a process model structure tree, and the process step is established in a mode of adding nodes under the process, and the process comprises the following steps:
according to the process type of the part, creating a process in a mode of adding nodes under a process model structure tree, selecting the name of the created process from the process name fed back by a structured process knowledge base, and establishing a process step in a mode of adding nodes under a new process;
the manufacturing resource information and the inspection information of the working procedure or the working step are automatically acquired, or the manufacturing resource information and the inspection information of the working procedure or the working step are selected by a user;
the method for automatically acquiring the manufacturing resource information and the inspection information of the process or the process step or selecting the manufacturing resource information and the inspection information of the process or the process step by a user comprises the following steps:
selecting basic attributes: automatically acquiring and displaying design options of manufacturing resource information stored in a manufacturing resource library or design options of manufacturing process information stored in the manufacturing resource library to an attribute column of a process during process design or process step design, automatically filling the attribute column of the process or process step if the attribute value of the manufacturing resource information of the process or process step is unique, and otherwise, selecting the attribute value of the manufacturing resource information of the process or process step by a user;
selecting an additional attribute: when the process including the additional attribute is a standard process, directly and automatically filling the additional attribute of the standard process into an attribute column of the process or the process step, otherwise, selecting the additional attribute by a user;
and selecting the inspection information of the step according to the structured process knowledge base.
2. The structured knowledge based three-dimensional process recipe guided method of claim 1,
when a plurality of working procedures are created, the sequence numbers of the working procedures are increased by 10 as the order of magnitude;
the default name of the step is defined as '10.1 new step', and the step numbers are increased by 0.1.
3. The structured knowledge based three-dimensional process recipe guided method of claim 1,
the additional attributes comprise working hour quota, process requirements, tooling and step content;
the inspection information comprises inspection items, inspection means, inspection methods, inspection frequency and technical requirements;
the inspection items include inspection means, inspection methods and inspection frequency.
4. The structured knowledge based three-dimensional process recipe guided method of claim 1,
obtaining process symbols of geometric features of the model based on manufacturing resource information, inspection information or a structured process knowledge base of the process or the process step, including:
the process symbols of the geometric characteristics of the model comprise the number of the same parts, a work center, equipment, a process method, process parameters and auxiliary materials;
the working center and the equipment directly inherit the manufacturing resource information and the inspection information of the working procedure or the working step, and the process method, the process parameters and the auxiliary materials are extracted item by item from the design options of the displayed structured process knowledge base.
5. Three-dimensional process procedure guided design system based on structured knowledge, characterized by comprising:
the process route planning module is used for creating a process under the process model structure tree according to the process type of the part and creating a process step in a mode of adding a node under the process;
the system integration module is used for automatically acquiring manufacturing resource information and inspection information of a process or a process step, or a user selects the manufacturing resource information and the inspection information of the process or the process step;
the process/step geometric feature design module is used for selecting typical geometric features with similarity larger than a set threshold from the model feature library according to manufacturing resource information and inspection information of the process or the step, inserting the typical geometric features into a process model structure tree and attaching the typical geometric features to the model geometry, determining the size of the typical geometric features and obtaining the model geometric features;
and the process symbol design module is used for obtaining the process symbols of the geometric characteristics of the model based on manufacturing resource information, inspection information or a structured process knowledge base of the working procedures or the working steps.
6. The structured knowledge based three-dimensional process recipe guided design system of claim 5,
a system integration module comprising:
the process/step basic attribute design module is used for automatically acquiring and displaying design options of manufacturing resource information stored in a manufacturing resource library or design options of manufacturing process information stored in the manufacturing process library to an attribute column of a process during process design or step design, automatically filling the attribute column of the process or step if the attribute value of the manufacturing resource information of the process or step is unique, and otherwise, selecting the attribute value of the manufacturing resource information of the process or step by a user;
and the process additional attribute design module is used for directly and automatically filling the additional attributes of the standard process into the attribute column of the process or the process step when the process comprising the additional attributes is the standard process, otherwise, the user selects the additional attributes and is used for selecting the inspection information of the process step according to the structured process knowledge base.
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