CN103473274A - Method of constructing machining three-dimensional technological process card - Google Patents

Abstract

The invention relates to a method of constructing a machining three-dimensional technological process card. The method includes the steps of generating a machining three-dimensional lightweight file, storing information, and generating a technological process card. The method has the advantages that the problem that the traditional two-dimensional mode process is difficult to organize and manage currently so that details and requirements of the machining process cannot be reflected visually and interactively is solved, a three-dimensional lightweight dynamic process model is directly used for guiding production, machining features and corresponding process information can be acquired visually, production and preparation cycles are shortened, and production efficiency is improved.

Description

A Construction Method of 3D Process Specification Card for Machining

technical field

The invention relates to an information system of a three-dimensional machining process, in particular to a method for building a three-dimensional machining process rule card.

Background technique

The 3D CAD (Computer Aided Design) system has now become the basic platform for digital design and manufacturing of enterprises, and the realization of product design based on the 3D CAD system has become very popular. However, the current machining process design is manually compiled based on two-dimensional drawings, which relies too much on the technical level and experience of the craftsmen, the design is not standardized and the compilation cycle is long. Technicians generate two-dimensional process cards. The organization and management of the process is difficult, and the details and requirements of the processing process cannot be reflected intuitively and interactively, which brings difficulties for downstream personnel to understand and use.

With the rapid development of MBD (Model Based Definition) technology in China, the process design of three-dimensional environment has become a research hotspot in digital design and manufacturing. It aims to use three-dimensional means to realize the process design and application of machining, Cancel two-dimensional drawings and process cards, and use three-dimensional process models as the only basis for manufacturing to guide processing. Machining 3D process design can be roughly divided into three stages: 3D process design, 3D process information management and 3D process field application. The 3D process design stage mainly includes steps such as process model construction, process information expression, process structure tree construction, and lightweight release of process models; 3D process information management mainly completes the associated storage of 3D process data, version management, approval process management, and authority management etc.; 3D process field application refers to loading the 3D process data and its associated relationship in the database to the 3D process specification card template to construct a 3D process specification card for parts machining, and provide a query and browsing environment for 3D machining on the processing site. Many scholars have carried out a lot of research on 3D process design for machining, but there is no mature 3D process design software for machining at present. In view of this, the applicant applied to the State Intellectual Property Office on June 4, 2012, titled "A Method for Constructing a Dynamic 3D Process Model" and "A Method for Expressing Process Information Based on a 3D Model", which better solved the problem. Problems of process model construction and process information expression.

For the generation of 3D process files, Chinese invention patent specification CN100559375C (the realization method of 3D assembly process files and on-site teaching based on WEB, patent No. ZL200810018965.8) discloses a method of compiling 3D assembly process files and assembly animations through Internet/Intranet The method can teach the operators on the assembly site conveniently and intuitively. However, for the 3D assembly process file obtained in this way, the manufacturer can only play the assembly animation defined on the design side, and cannot perform rotation, zoom, and translation operations, and cannot understand and grasp the process as a whole. At the same time, because the perspective of the assembly animation is fixed , cannot highlight the area to be assembled, and cannot fully express the details of the process, making it difficult to achieve the desired effect. After adopting MBD technology, the process information is also integrated in the 3D model, and personnel with different roles in the process and manufacturing process can obtain manufacturing information through the MBD model. The current MBD process model construction is all generated in the CAD environment, and at the same time integrates various information such as dimensions, tolerances, geometric accuracy, surface structure, and process information, which cannot be directly used to guide production. If the machining model is relatively complex, the amount of data is very large, which brings difficulties to visual viewing and browsing. At the same time, for workshop workers, there is no need to use expensive and complicated original CAD tools to browse, and only need to obtain the processing information involved in their own process and the upper and lower processes.

Contents of the invention

In order to overcome the difficulties in the organization and management of the process in the two-dimensional mode, and the inability to reflect the details and requirements of the processing process intuitively and interactively, the present invention aims to provide a system that can perform interactive operations and directly guide the manufacturing personnel, and is easy to understand and use. The construction method of the machining three-dimensional process specification card includes three steps of machining three-dimensional lightweight file generation, information storage and process specification card generation; wherein,

1) Machining 3D lightweight file generation: At the process design end, the process model is published as a series of machining 3D lightweight files for the manufacturing process. The process model refers to the part processing feature built on the basis of the process reference model and 3D models of information;

2) Information storage: associate and store lightweight documents and process specification information to the corresponding location of the PDM system;

3) Process specification card generation: load the lightweight files and process specification information stored in the PDM system to the corresponding area of the 3D process specification card template developed based on IE browser, generate a machining 3D process specification card, store it in the PDM system, and Push it to the production workshop through the data interface to assist workers in processing.

As a further improvement of step 1) of the above solution, the machining three-dimensional lightweight file includes a process lightweight file and a process step lightweight file, and the generation steps are as follows:

1) Make a copy of the process model as the release basis, called the temporary process model, and hide all the labeling information of the temporary process model. The process model contains n process nodes, and the i-th process node contains m _i process step nodes. Wherein, i=n,n-1,...1, m _i and n are both positive integers;

2) Based on the sequence of process rules, restore all the labeling information under the i-th process node in the temporary process model according to the process nodes, identify the features under the i-th process node and perform dynamic coloring processing, and generate the i-th process lightweight file by publishing ;

3) Judging whether m _i > 1 is true, if true, execute step 4), if not, directly execute step 6);

4) Restore the characteristics of the i-th process node to the original color through dynamic coloring, hide all the label information under the i-th process node, restore the label information of the j-th process node, and change the j-th process node The features are dynamically colored, and the lightweight file of the jth work step under the ith process node is generated by publishing, where j=m _i ,m _i -1,...1;

5) Delete the label and feature information of the jth step node, execute j--, judge whether j=0 is true, if true, execute step 6), if not, execute step 4);

6) Delete all annotations and feature information under the i-th process node in the temporary process model, execute i--, judge whether i=0 is true, if true, release ends, if not true, execute step 2).

As a further improvement of step 2) of the above solution, the information storage includes the following steps:

1) Store the process lightweight files and process step lightweight files generated by publishing to the corresponding locations in the PDM system;

2) Store the process specification information in the corresponding data table in the PDM system, and establish the relationship between process specification information and lightweight files through database technology.

As a further improvement of step 3) of the above scheme, the generation of the process specification card refers to loading the lightweight files and process specification information stored in the PDM system into the corresponding areas of the three-dimensional process specification card template through triggering of the process specification node, Generate process specification cards.

Among them, the series of machining three-dimensional lightweight files are released and generated based on the same process model, and the file generation sequence is strictly executed in accordance with the sequence of the process rule tree.

The series of machining 3D lightweight files are in ProductView format, and the file extension is .pvz or .edz.

The process lightweight file contains the geometric features and labeling information of the process model corresponding to a process node in the process specification tree, and distinguishes the processing features and non-processing features of the process through dynamic coloring; the process step lightweight file contains the process specification A process step node in the tree corresponds to the geometric features and labeling information of the process step model, and distinguishes the processing features and non-processing features of the process step through dynamic coloring.

The dynamic coloring process is to add a predefined color to the processing features under the process and step nodes, and distinguish the processing features and non-processing features under the process/step nodes by color.

The data table includes a model information table, a process information table, a working step information table, a material information table, an equipment information table, a processing method information table, a tool information table, a processing parameter information table, a cutting fluid information table, and a tooling information table. Among them, the model information table stores information such as the drawing number, model ID, part name, version, status, material grade, etc. of the process model, and is associated with the material information table through the material grade, and records the blank size of the part at the same time; the process information table stores the process The model ID, process ID, process name, equipment number, drawing number of all tooling used in the process, process lightweight file name, man-hour quota, process description, etc. It is associated with the model information table, equipment information table, and tooling information table, and the process lightweight file name is associated with the process lightweight file in the PDM system; the process step information table stores the process ID, process step ID, and process step name of the process model , process step lightweight file name, processing method ID, tool ID, processing parameters, cutting fluid ID, tooling drawing number, process step description, etc., and pass the process ID, processing method ID, tool ID, processing parameters, cutting fluid ID , tooling drawing number are respectively associated with the process information table, processing method information table, tool information table, processing parameter information table, cutting fluid information table, tooling information table, and the name of the light weight file of the process step is related to the light weight file of the process step in the PDM system associated.

The machining three-dimensional process specification card construction method involved in the present invention is aimed at the on-site processing requirements of the three-dimensional process, through the lightweight release of the MBD process model, the structured associated storage of information, and the loading of process specification card information to generate interactive operations and direct The three-dimensional machining process specification card for guiding on-site machining overcomes the difficulties in the organization and management of the process in the traditional two-dimensional mode, which cannot intuitively and interactively reflect the details and requirements of the machining process.

Description of drawings

Fig. 1 is a flowchart of the present invention;

Fig. 2 is the flow chart of three-dimensional lightweight file generation of the present invention;

Fig. 3 is a schematic diagram of structured associative storage of lightweight files and process model information in the present invention;

Figure 4 is the organization interface of the machining parts process specification;

Figure 5 is the publishing result setting interface;

Figure 6 is a schematic diagram of the release results;

Figure 7 is the publishing result management interface;

Figure 8 is a schematic diagram of a three-dimensional process specification card for machining a part;

Fig. 9 is a schematic diagram of the application between trucks of a three-dimensional process specification for the machining of a certain part.

Among them, 1: title area; 2: material area; 3: structure tree area; 4: text area; 5: quota area; 6: review area; 7: model area.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Fig. 1 is a flow chart of the present invention, and the construction method of machining three-dimensional process specification card comprises three steps of machining three-dimensional lightweight file generation, information storage and process specification card generation:

1) Machining 3D lightweight file generation: At the process design end, the process model is published as a series of machining 3D lightweight files for the manufacturing process. The process model refers to the part processing feature built on the basis of the process reference model and 3D models of information;

2) Information storage: associate and store lightweight documents and process specification information to the corresponding location of the PDM system;

3) Process specification card generation: load the lightweight files and process specification information stored in the PDM system to the corresponding area of the 3D process specification card template developed based on IE browser, generate a machining 3D process specification card, store it in the PDM system, and Push it to the production workshop through the data interface to assist workers in processing.

Wherein, the process model refers to a three-dimensional model that includes part processing features and information constructed on the basis of a process reference model. For the specific construction method, please refer to the invention patent application "A Dynamic Model" submitted by the applicant on June 4, 2012. A method for constructing a 3D process model".

As a further improvement of step 1) of the above solution, Fig. 2 is a flow chart of the generation of the 3D lightweight file of the present invention, the machining 3D lightweight file includes a process lightweight file and a process step lightweight file, and the generation steps are as follows:

1) Make a copy of the process model as the release basis, called the temporary process model, and hide all the labeling information of the temporary process model. The process model contains n process nodes, and the i-th process node contains m _i process step nodes. Wherein, i=n,n-1,...1, m _i and n are both positive integers;

2) Based on the sequence of process rules, restore all the labeling information under the i-th process node in the temporary process model according to the process nodes, identify the features under the i-th process node and perform dynamic coloring processing, and generate the i-th process lightweight file by publishing ;

3) Judging whether m _i > 1 is true, if true, execute step 4), if not, directly execute step 6);

4) Restore the characteristics of the i-th process node to the original color through dynamic coloring, hide all the label information under the i-th process node, restore the label information of the j-th process node, and change the j-th process node The features are dynamically colored, and the lightweight file of the jth work step under the ith process node is generated by publishing, where j=m _i ,m _i -1,...1;

5) Delete the label and feature information of the jth step node, execute j--, judge whether j=0 is true, if true, execute step 6), if not, execute step 4);

6) Delete all annotations and feature information under the i-th process node in the temporary process model, execute i--, judge whether i=0 is true, if true, release ends, if not true, execute step 2).

As a further improvement of step 2) of the above solution, Fig. 3 is a schematic diagram of structured associative storage of lightweight files and process model information in the present invention. The information storage includes the following steps:

1) Store the process lightweight files and process step lightweight files generated by publishing to the corresponding locations in the PDM system;

2) Store the process specification information in the corresponding data table in the PDM system, and establish the relationship between process specification information and lightweight files through database technology.

As a further improvement of step 3) of the above scheme, in combination with Figure 4, Figure 5, Figure 6, Figure 7, and Figure 8, the generation of the process specification card refers to triggering the process specification node to convert the lightweight file stored in the PDM system and the process specification information are respectively loaded into the corresponding areas of the 3D process specification card template to generate the process specification card. Among them, the process lightweight file and the process step lightweight file are loaded into the model area 7 of the 3D process specification card, the model information table information is loaded into the material area 2 and the title area 1, and the process information table and process step information table information is loaded into the structure tree area 3 and text area 4, process information combination symbol information table information is loaded into text area 4; lightweight file and data table information is triggered through structure tree area 3.

In the above technical solution, the series of machining three-dimensional lightweight files are released and generated based on the same process model, and the file generation sequence is strictly executed in accordance with the sequence of process regulations.

The series of machining 3D lightweight files are in ProductView format, and the file extension is .pvz or .edz.

The process lightweight file contains the geometric features and labeling information of the process model corresponding to a process node in the process specification tree, and distinguishes the processing features and non-processing features of the process through dynamic coloring; the process step lightweight file contains the process specification A process step node in the tree corresponds to the geometric features and labeling information of the process step model, and distinguishes the processing features and non-processing features of the process step through dynamic coloring.

The dynamic coloring process is to add a predefined color to the processing features under the process/step node, and use the color to distinguish the processing features and non-processing features under the process/step node.

The data table includes a model information table, a process information table, a working step information table, a material information table, an equipment information table, a processing method information table, a tool information table, a processing parameter information table, a cutting fluid information table, and a tooling information table. Among them, the model information table stores information such as the drawing number, model ID, part name, version, status, material grade, etc. of the process model, and is associated with the material information table through the material grade, and records the blank size of the part at the same time; the process information table stores the process The model ID, process ID, process name, equipment number, drawing number of all tooling used in the process, process lightweight file name, man-hour quota, process description, etc. It is associated with the model information table, equipment information table, and tooling information table, and the process lightweight file name is associated with the process lightweight file in the PDM system; the process step information table stores the process ID, process step ID, and process step name of the process model , process step lightweight file name, processing method ID, tool ID, processing parameters, cutting fluid ID, tooling drawing number, process step description, etc., and pass the process ID, processing method ID, tool ID, processing parameters, cutting fluid ID , tooling drawing number are respectively associated with the process information table, processing method information table, tool information table, processing parameter information table, cutting fluid information table, tooling information table, and the name of the light weight file of the process step is related to the light weight file of the process step in the PDM system associated.

The construction method of the machining three-dimensional process specification card of the present invention will be described in detail below through examples.

Combined with Figure 4, Figure 5, Figure 6, Figure 7, and Figure 8, the 3D process model of a certain part (drawing number AA8.230.10312) in the Pro/EWF5.0 environment contains 10 process nodes, and each process node contains The number of working step nodes is 0, 4, 0, 0, 5, 0, 0, 0, 0, 0. Refer to Figure 4 for process planning and organization. Information such as drawing numbers, materials, and versions are directly read from the model tree information in the Pro/E environment. In Figure 3, "generating lightweight documents" refers to publishing and generating process lightweight documents and process lightweight documents on the process model according to the process shown in Figure 2, and "writing into the database" refers to publishing process specification information as shown in Figure 3 The association relationship is stored in the corresponding data table of the Windchill9.1 system. "Checking in PDM" refers to storing the generated process lightweight file and process step lightweight file to the specified location in Windchill9.1, and the specified location can be pre-installed. configuration, see Figure 5. Figure 5 pre-defines information such as the address of the Windchill9.1 server, the storage location of lightweight files, and the color used to distinguish model features. Click the "result release" button in Figure 4 to save the lightweight files and process specifications to the predefined location in Windchill9.1, and the storage results of the lightweight files are shown in Figure 6. After the publication is completed, realize the management of the publication results of the machining process in Windchill9.1, as shown in Figure 7. Click the .pvz file under "Release Results" in Figure 7 to trigger the machining 3D process specification card template, and at the same time load the lightweight file and data table information stored in Windchill9.1 to the 3D process specification according to the association shown in Figure 3 The card template realizes the lightweight release of the process model that is separated from the CAD platform, and completes the construction of the 3D process specification card. The interface of the 3D process specification card is shown in Figure 8, which is mainly divided into title area 1, material area 2, structure tree area 3, model area 7, text area 4, quota area 5 and review area 6, etc. Title area 1 mainly records the drawing number, name, version and other information of the part, which is directly read from the model information table; material area 2 displays the material properties of the part, including material code, material name, material grade, material specification, etc., from Read directly from the model information table; the structure tree area 3 shows the processing process of the part, which is constructed by the process and step nodes, and is read from the process information table and the work step information table; the model area 7 mainly displays the process/work of the part Step by step lightweight release model, covering the required processing information, and highlighting the required processing features through color, the trigger is to load from Windchill9.1 through the process and step nodes in the structure tree area under the lightweight file name ;Text area 4 mainly describes the process information of this process/work step, including process information such as name of work step, tooling, cutting fluid, processing parameters, tools, and precautions; Publish the results, enter the quota information such as finality, single piece, base number, etc., and click "Save" to record the quota information; the audit area 6 is mainly for personnel with different roles (process designer, quota officer, reviewer, and approver). Review the process design in the 3D process specification card, put forward revision opinions, and complete the process review. Click "5.5 car steps" in the structure tree area in Figure 8, and load the light weight file and data sheet information corresponding to the process step to the 3D process specification card template to generate a process specification card and display the process step in a highlighted color (red). The processing characteristics of the working step. The process specification card is stored in Windchill9.1, pushed to the workshop through the data interface, and the viewing authority of workshop workers is strictly controlled through the authority definition, so that workers can obtain the corresponding level of viewing authority and obtain production information. The schematic diagram of the workshop is shown in Figure 9.

The invention realizes the generation of the machining intermediate process model, and can gradually convert the original MBD process model generated by the CAD tool into a lightweight neutral format oriented to the processing process through the information system. In the lightweight format file, not only the process/work The geometric entity information included in the step also needs to include PMI information (Product Manufacturing Information, product manufacturing information) such as dimensions, tolerances, geometric accuracy, equipment, tooling, etc. in the original MBD process model, which is convenient to use lightweight tools on ordinary computers. View accurate and valid MBD models without relying on native CAD tools. At present, the ProductView software provided by PTC supports the conversion of PMI information in MBD models of mainstream CAD platforms such as Pro/E and CATIAV5, and provides a good ability to visualize MBD models. Users can use ProductView to rotate, cut, and Operations such as annotation, dimension measurement, and explosion diagram generation can also directly add annotation information such as dimensions and tolerances in ProductView, and perform PMI annotations. At the same time, the annotation results can be saved in Windchill for other personnel to view. ProductView has a good data lightweight function, and can support direct viewing and browsing of large-scale 3D models on ordinary computers, so that it can better meet the needs of visual viewing and browsing of complex machining models.

The machining three-dimensional process specification card construction method involved in the present invention is aimed at the on-site processing requirements of the three-dimensional process, through the lightweight release of the MBD process model, the structured associated storage of information, the loading of process specification card information, and the definition of authority, to generate interactive The three-dimensional machining process specification card for operating and directing on-site machining overcomes the difficulties in the organization and management of the process in the traditional two-dimensional mode, which cannot intuitively and interactively reflect the details and requirements of the machining process.

Components and technological processes not described in detail in this embodiment are well-known components and common means in this industry, and are not described here one by one.

Claims (9)

1. A method for building a machining three-dimensional process specification card, characterized in that: comprising three steps of machining three-dimensional lightweight file generation, information storage and process specification card generation; wherein, 1) Machining 3D lightweight file generation: At the process design end, the process model is published as a series of machining 3D lightweight files for the manufacturing process. The process model refers to the part processing feature built on the basis of the process reference model and 3D models of information; 2) Information storage: associate and store lightweight documents and process specification information to the corresponding location of the PDM system; 3) Process specification card generation: load the lightweight files and process specification information stored in the PDM system to the corresponding area of the 3D process specification card template developed based on IE browser, generate a machining 3D process specification card, store it in the PDM system, and Push it to the production workshop through the data interface to assist workers in processing. 2. A method for constructing a machining three-dimensional process specification card according to claim 1, characterized in that: said machining three-dimensional lightweight file includes process lightweight file and process step lightweight file, and its generation steps are as follows: 1) Make a copy of the process model as the release basis, called the temporary process model, and hide all the labeling information of the temporary process model. The process model contains n process nodes, and the i-th process node contains m _i process step nodes. Wherein, i=n,n-1,...1, m _i and n are both positive integers; 2) Based on the sequence of process rules, restore all the labeling information under the i-th process node in the temporary process model according to the process nodes, identify the features under the i-th process node and perform dynamic coloring processing, and generate the i-th process lightweight file by publishing ; 3) Judging whether m _i > 1 is true, if true, execute step 4), if not, directly execute step 6); 4) Restore the characteristics of the i-th process node to the original color through dynamic coloring, hide all the label information under the i-th process node, restore the label information of the j-th process node, and change the j-th process node The features are dynamically colored, and the lightweight file of the jth work step under the ith process node is generated by publishing, where j=m _i ,m _i -1,...1; 5) Delete the label and feature information of the jth step node, execute j--, judge whether j=0 is true, if true, execute step 6), if not, execute step 4); 6) Delete all annotations and feature information under the i-th process node in the temporary process model, execute i--, judge whether i=0 is true, if true, release ends, if not true, execute step 2). 3. A method for constructing a machining three-dimensional process specification card according to claim 1, wherein said information storage comprises the following steps: 1) Store the process lightweight files and process step lightweight files generated by publishing to the corresponding locations in the PDM system; 2) Store the process specification information in the corresponding data table in the PDM system, and establish the relationship between process specification information and lightweight files through database technology. 4. the construction method of a kind of machining three-dimensional process specification card according to claim 1, is characterized in that: the generation of described process specification card refers to triggering by process specification node, the lightweight file stored in the PDM system, The process specification information is respectively loaded into the corresponding area of the 3D process specification card template to generate the process specification card. 5. A method for constructing a machining three-dimensional process specification card according to claim 1, characterized in that: the series of machining three-dimensional lightweight files are released and generated based on the same process model, and the file generation sequence is strictly in accordance with the sequence of the process specification tree implement. 6. The method for constructing a machining three-dimensional process specification card according to claim 1, characterized in that: the series of machining three-dimensional lightweight files are in ProductView format, and the file extension is .pvz or .edz. 7. The construction method of a machining three-dimensional process specification card according to claim 2, characterized in that: the process lightweight file includes geometric features and labeling information of a process model corresponding to a certain process node in the process specification tree, and Distinguish the processing features and non-processing features of the process through dynamic coloring; the light weight file of the process step contains the geometric features and labeling information of the process step model corresponding to a process step node in the process specification tree, and distinguish the process through dynamic coloring The machining and non-machining features of the step. 8. A method for constructing a machining three-dimensional process specification card according to claim 2, characterized in that: the dynamic coloring process is to add a predefined color to the processing features under the process/work step node, and distinguish them by color The machining features and non-machining features under the process/step node. 9. The construction method of a machining three-dimensional process specification card according to claim 3, wherein the data table includes a model information table, a process information table, a work step information table, a material information table, and an equipment information table , Processing method information table, tool information table, processing parameter information table, cutting fluid information table, tooling information table. Among them, the model information table stores information such as the drawing number, model ID, part name, version, status, material grade, etc. of the process model, and is associated with the material information table through the material grade, and records the blank size of the part at the same time; the process information table stores the process The model ID, process ID, process name, equipment number, drawing number of all tooling used in the process, process lightweight file name, man-hour quota, process description, etc. It is associated with the model information table, equipment information table, and tooling information table, and the process lightweight file name is associated with the process lightweight file in the PDM system; the process step information table stores the process ID, process step ID, and process step name of the process model , process step lightweight file name, processing method ID, tool ID, processing parameters, cutting fluid ID, tooling drawing number, process step description, etc., and pass the process ID, processing method ID, tool ID, processing parameters, cutting fluid ID , tooling drawing number are respectively associated with the process information table, processing method information table, tool information table, processing parameter information table, cutting fluid information table, tooling information table, and the name of the light weight file of the process step is related to the light weight file of the process step in the PDM system associated.

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