CN105718669A - Method for establishing aviation brake fastener library based on CATIA - Google Patents

Abstract

The invention discloses a method for establishing a CATIA-based aviation brake fastener library, comprising: classifying aviation brake fastening standard parts according to bolts, screws, nuts, washers, rivets and pins; creating a standard part library; Parametric modeling. The present invention completes the MBD definition of aviation brake fasteners in CATIA, uses the Catalog tool to create a fastener database, and uses electronic forms to manage the parts library, providing for the development of aviation brake products and the development of serialized products Based on the digital model, it reduces repetitive design work and improves work efficiency.

Description

A CATIA-Based Establishment Method of Aviation Brake Fastener Library

technical field

The invention belongs to the field of parametric modeling, in particular to a method for establishing a CATIA-based aviation brake fastener library.

Background technique

In mechanical products, 30%-70% of the parts are standard parts or non-standard common parts. These parts are similar in structure but different in size. An effective way to improve product design quality and shorten the product development cycle. Therefore, the wide application of standard parts, that is, the development of standard parts library can bring convenience to product design. In the design and manufacture of aerospace brake structures, there are many types of standard parts, among which the number of threaded fasteners used accounts for 30% to 40% of the total parts. Therefore, the rational application of standard parts, especially threaded fasteners, in the design process can simplify structural design and improve assembly efficiency, which has very important technical and economic significance for shortening product design and manufacturing cycles, reducing production costs, and improving product quality.

In recent years, especially since the 1990s, the status of digital technology in manufacturing companies around the world, especially in large aircraft manufacturing companies, has been paid more and more attention, and it has become an important symbol of whether they can beat companies with the same status. Digital R&D is a transformation of a new production method from the inside to the outside, from the old to the new. It promotes fundamental changes in management systems, organizational systems, standards, design methods, production operations, ways of thinking and ways of working.

MBD technology is a new trend in the development of CAD technology, and has been applied in aircraft design and manufacture. The design and manufacture of aircraft requires the use of a three-dimensional solid model as the only basis in the manufacturing process. After the MBD model is adopted, the three-dimensional model will run through all aspects of production such as design, tooling, process, manufacturing and assembly. However, there are many parts that are similar in structure, so it is necessary to do repetitive work when building the MBD model, which will waste a lot of time, reduce the efficiency of development, and prolong the development cycle of new products.

Contents of the invention

The purpose of the present invention is to provide a method for establishing a CATIA-based aviation brake fastener library, aiming at reducing repetitive design work and improving work efficiency.

The present invention is achieved in that a kind of establishment method based on the CATIA aviation brake fastener storehouse comprises:

Step 1. Classify the aviation brake fastening standard parts according to bolts, screws, nuts, washers, rivets, and pins;

Step 2. Create a standard parts library;

Step three, parametric modeling.

Further, the specific steps for creating a standard library include:

Step 1. Data preparation;

Step two, parts analysis;

Step 3. Define design variables;

Step 4, establish a mathematical expression;

Step five, establish a parametric model;

Step 5, associating the design table;

Step 6. Check the model;

Step seven, MBD definition;

Step eight, create a Catalog file.

Further, the specific method of the parametric modeling is:

Store the data related to the model in the corresponding file in the form of a table, use the DesignTable design tool to associate the parameters of the model with the data in the table, and realize the driving of the model by selecting different data in the DesignTable design tool .

The present invention completes the MBD definition of aviation brake fasteners in CATIA, uses the Catalog tool to create a fastener database, and uses electronic forms to manage the parts library, providing for the development of aviation brake products and the development of serialized products Based on the digital model, it reduces repetitive design work and improves work efficiency.

Description of drawings

Fig. 1 is the flow chart of the establishment method of the CATIA-based aerospace brake fastener library provided by the embodiment of the present invention;

Fig. 2 is a flow chart of creating a standard library based on CATIA provided by the embodiment of the present invention.

detailed description

In order to further understand the content, features and effects of the present invention, the following examples are given, and detailed descriptions are given below with reference to the accompanying drawings.

Please refer to Figure 1 and Figure 2:

A method for establishing a CATIA-based aerospace brake fastener library, including:

S101. Classify the aviation brake fastening standard parts according to bolts, screws, nuts, washers, rivets, and pins;

S102, creating a standard parts library;

S103. Parametric modeling.

Further, the specific steps for creating a standard library include:

Step 1. Data preparation;

Step two, parts analysis;

Step 3. Define design variables;

Step 4, establish a mathematical expression;

Step five, establish a parametric model;

Step 5, associating the design table;

Step 6. Check the model;

Step seven, MBD definition;

Step eight, create a Catalog file.

Further, the specific method of the parametric modeling is:

Store the data related to the model in the corresponding file in the form of a table, use the DesignTable design tool to associate the parameters of the model with the data in the table, and realize the driving of the model by selecting different data in the DesignTable design tool .

Taking the round head bolt as an example, first establish the characteristic parameters that determine the shape of the bolt in the "formula", then establish the 3D model template of the round head bolt, and use the characteristic parameters to fully constrain its sketch, and finally use the "design table" function to add the previous Organize the parameter table and associate it with the model to realize the serialization of parts.

Create a new "Catalog" file in CATIA, and select the model file that has been established through "Add Part Series". Considering that the size information of the part may not be used temporarily in the later assembly process, the label set information will be temporarily added after the MBD definition is completed. Hidden, if you need the size information of the part when you call it, you can display the annotation set information in the model tree.

In the process of assembly design, through the "Catalogue Browser" command in the "Tools" menu, open the built HBStandards parts library file in the dialog box, and then browse the parts in the parts library in the directory browser window. Select the part of the corresponding specification in the graphic catalog list, double-click to generate the corresponding part, and add it to the current assembly.

The present invention completes the MBD definition of aviation brake fasteners in CATIA, uses the Catalog tool to create a fastener database, and uses electronic forms to manage the parts library, providing for the development of aviation brake products and the development of serialized products Based on the digital model, it reduces repetitive design work and improves work efficiency.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications made to the above embodiments according to the technical essence of the present invention, equivalent changes and modifications, all belong to this invention. within the scope of the technical solution of the invention.

Claims (3)

1. the method for building up based on the aviation braking securing member storehouse of CATIA, it is characterised in that the described aviation based on CATIA is braked the method for building up in securing member storehouse and included:

Step one, by aviation braking fastening standard component classify according to bolt, screw, nut, packing ring, rivet, pin；

Step 2, establishment Standard partslibrary；

Step 3, parametric modeling.

2. the method for building up in securing member storehouse is braked in the aviation based on CATIA as claimed in claim 1, it is characterised in that the described concrete steps creating java standard library include:

Step one, data prepare；

Step 2, part analysis；

Step 3, definition design variable；

Step 4, set up mathematic(al) representation；

Step 5, set up parameterized model；

Step 5, associated design table；

Step 6, inspection model；

Step 7, MBD define；

Step 8, establishment Catalog file.

3. the method for building up in securing member storehouse is braked in the aviation based on CATIA as claimed in claim 1, it is characterised in that described parametric modeling method particularly includes:

The data relevant with model are left in table form in corresponding file, utilize DesignTable design table instrument the parameter of model to be associated with the data in form, design in table instrument by selecting different data to realize the driving to model at DesignTable.