CN113704904A - Method and system for establishing section parts based on three-dimensional section library - Google Patents
Method and system for establishing section parts based on three-dimensional section library Download PDFInfo
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Abstract
The application belongs to the field of three-dimensional design of parts, and particularly relates to a method and a system for establishing a profile part based on a three-dimensional profile library. A method, characterized in that it comprises: creating an empty three-dimensional profile library; establishing a three-dimensional section bar template; the one-to-one correspondence relationship between the profile specification variables of the three-dimensional profile template and the profile section constraint dimensions; establishing a section specification database; importing the three-dimensional section template and the section specification database into the three-dimensional section library; establishing a one-to-one corresponding relation between the section specification variables of the three-dimensional section template and the section specification parameters in the section specification database; and calling the corresponding three-dimensional section template from the three-dimensional section library according to the section specification parameters, and instantiating the three-dimensional section template according to the actual product appearance binding surface and the product axis to obtain the instantiated section part. The method and the device can be used for quickly, standardly and accurately establishing the section parts.
Description
Technical Field
The application belongs to the field of three-dimensional design of parts, and particularly relates to a method and a system for establishing a profile part based on a three-dimensional profile library.
Background
In the mechanical part design industry, the establishment of parts in a three-dimensional design platform has become the mainstream of the industry. In the structural design of high-tech fields such as aviation and aerospace, a profile part is one of the frequently used structural parts.
At present, designers need to respectively establish three-dimensional models of profile parts according to profile specifications one by one, and then examine and sign the profile parts and send the profile parts to production departments. Due to the reasons of large section modeling modulus, insufficient section modeling experience and the like, the problems of wrong section size or wrong section modeling method, nonstandard modeling and the like are easily caused when the three-dimensional modeling of the section is carried out, so that the section parts with the errors are issued for production, and the production progress is seriously influenced.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The application aims to provide a method and a system for establishing a section part based on a three-dimensional section library, so as to solve at least one problem in the prior art.
The technical scheme of the application is as follows:
a first aspect of the present application provides a method for building profile parts based on a three-dimensional profile library, comprising:
step one, creating an empty three-dimensional section library in a three-dimensional design platform;
step two, establishing a three-dimensional section template according to the section appearance binding surface, the section axis and the section specification characteristics, and ensuring that the section constraint size of the three-dimensional section template is in one-to-one correspondence with the section constraint size in a section specification manual;
step three, defining section specification variables of the three-dimensional section template, and establishing a one-to-one correspondence relationship between the section specification variables of the three-dimensional section template and section constraint sizes of the sections;
step four, establishing a section specification database according to section specification parameters in the section specification manual;
fifthly, importing the three-dimensional section template and the section specification database into the three-dimensional section library;
step six, establishing a one-to-one corresponding relation between the section specification variables of the three-dimensional section template and the section specification parameters in the section specification database;
and step seven, calling a corresponding three-dimensional section template from the three-dimensional section library according to the section specification parameters, and instantiating the three-dimensional section template according to the actual product appearance binding surface and the product axis to obtain the instantiated section part.
In at least one embodiment of the present application, in the second step, three-dimensional profile templates with various cross-sectional shapes are established according to the profile contour attaching surface, the profile axis and the profile specification characteristics.
In at least one embodiment of the present application, the three-dimensional profile template includes an L-section three-dimensional profile template, a Z-section three-dimensional profile template, and a T-section three-dimensional profile template.
In at least one embodiment of the present application, in step three, the defining the profile specification variables of the three-dimensional profile template, and establishing the one-to-one correspondence relationship between the profile specification variables of the three-dimensional profile template and the profile section constraint dimensions includes:
defining section specification variables of the L-shaped section three-dimensional section template comprise section height H, section width B, section thickness delta and section thickness delta1And profile rounding R;
establishing the one-to-one correspondence relationship between the section specification variables and the section constraint sizes of the section of the three-dimensional section template with the L-shaped section comprises the following steps:
the height H of the variable profile corresponds to the constraint size of the web height of the profile;
the width B of the variable section bar corresponds to the constraint size of the width of the section bar edge strip;
the variable profile thickness delta corresponds to the constraint size of the profile edge strip thickness;
variable section bar thickness delta1Constraint size corresponding to the thickness of the web of the profile;
the variable profile radius R corresponds to the constraint dimension of the radius at the profile inner corner.
In at least one embodiment of the present application, in step four, the profile specification parameters in the profile specification database include a profile specification number, a section height, a section width, a web thickness, and a bead thickness.
In at least one embodiment of the present application, in step seven, the corresponding three-dimensional profile template is called from the three-dimensional profile library according to the profile specification number.
A second aspect of the present application provides a system for building profile parts based on a three-dimensional profile library, based on the method for building profile parts based on a three-dimensional profile library as described above, including:
the three-dimensional section library is used for managing the three-dimensional section templates;
the section specification database is used for storing section specification parameters;
the association module is used for establishing the association relationship between the profile specification variable of the three-dimensional profile template and the profile specification parameters in the profile specification database;
and the instantiation module is used for instantiating the three-dimensional profile template in the three-dimensional profile library.
The invention has at least the following beneficial technical effects:
according to the method for establishing the section parts based on the three-dimensional section library, section modeling is based on the standard three-dimensional section library and the section specification database, the possibility that designers design models from the beginning and make mistakes manually is eliminated, design errors are avoided from a design source, and the design accuracy and the work efficiency are improved; the whole section modeling process reduces the dependence on designers, and is beneficial to the designers to quickly start up; the whole section modeling flow reduces design errors caused by manual intervention.
Drawings
FIG. 1 is a schematic view of a three-dimensional profile form according to one embodiment of the present application;
FIG. 2 is a schematic illustration of a profile in a profile handbook according to one embodiment of the present application;
FIG. 3 is a schematic diagram of the correspondence between parameter variables in a three-dimensional profile template and corresponding parameters in a profile specification database according to an embodiment of the present application;
fig. 4 is a schematic view of an instantiated profile part of an embodiment of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The present application is described in further detail below with reference to fig. 1 to 4.
A first aspect of the present application provides a method for building profile parts based on a three-dimensional profile library, comprising:
step one, creating an empty three-dimensional section library in a three-dimensional design platform;
step two, establishing a three-dimensional section template according to the section appearance binding surface, the section axis and the section specification characteristics, and ensuring that the section constraint size of the three-dimensional section template is in one-to-one correspondence with the section constraint size in a standard section specification manual;
step three, defining section specification variables of the three-dimensional section template, and establishing a one-to-one correspondence relationship between the section specification variables of the three-dimensional section template and section constraint dimensions of the sections;
step four, establishing a section specification database according to section specification parameters in the section specification manual;
step five, importing the three-dimensional section template and the section specification database into a three-dimensional section library;
step six, establishing a one-to-one corresponding relation between the section specification variables of the three-dimensional section template and the section specification parameters in the section specification database;
and step seven, calling the corresponding three-dimensional section template from the three-dimensional section library according to the section specification parameters, and instantiating the three-dimensional section template according to the actual product appearance binding surface and the product axis to obtain the instantiated section part.
According to the method for establishing the section parts based on the three-dimensional section library, the established three-dimensional section library has the following functions:
a) the database management functions of importing, storing, exporting, browsing a classification list, three-dimensional profile template files and the like can be realized;
b) the method can correlate the profile specification parameter data in the profile specification database and the profile specification variable data in the three-dimensional profile template file, and display key parameters such as profile specification numbers and the like in a three-dimensional profile library list;
c) the modeling basis elements of the template file can be replaced when the three-dimensional profile template file is instantiated.
The method for establishing the profile parts based on the three-dimensional profile library can establish three-dimensional profile templates with various cross-sectional shapes according to profile shape binding surfaces, profile axes and profile specification characteristics, and can comprise L-shaped cross-section three-dimensional profile templates (see figure 1), Z-shaped cross-section three-dimensional profile templates, T-shaped cross-section three-dimensional profile templates and the like. During modeling, the section constraint size in the three-dimensional section template is ensured to be in one-to-one correspondence with the section constraint size parameters in the standard section specification manual.
In one embodiment of the present application, an L-section three-dimensional profile form is created as shown in fig. 1, which corresponds one-to-one to the section constraint dimension of an L-section in the profile specification manual as shown in fig. 2.
In the third step, the section specification variables of the three-dimensional section template are defined, and the one-to-one correspondence relationship between the section specification variables of the three-dimensional section template and the section constraint sizes of the sections is established. Specifically, taking an L-shaped section three-dimensional section template as an example, the method comprises the following steps:
defining section specification variables of the L-shaped section three-dimensional section template comprise section height H, section width B, section thickness delta and section thickness delta1And profile rounding R;
establishing the one-to-one correspondence relationship between the section specification variables and the section constraint sizes of the section of the three-dimensional section template with the L-shaped section comprises the following steps:
the height H of the variable profile corresponds to the constraint size of the web height of the profile;
the width B of the variable section bar corresponds to the constraint size of the width of the section bar edge strip;
the variable profile thickness delta corresponds to the constraint size of the profile edge strip thickness;
variable section bar thickness delta1Constraint size corresponding to the thickness of the web of the profile;
the variable profile radius R corresponds to the constraint dimension of the radius at the profile inner corner.
According to the method for establishing the section parts based on the three-dimensional section library, the section specification parameters in the section specification database comprise data such as section specification numbers, section heights, section widths, web thicknesses and edge strip thicknesses, and the data are shown in table 1.
TABLE 1
According to the method for establishing the section parts based on the three-dimensional section library, after the three-dimensional section template and the section specification database are led into the three-dimensional section library, the one-to-one corresponding relation between the section specification variables of the three-dimensional section template and the section specification parameters in the section specification database is established according to the graph 3.
When the profile part is needed, a designer can directly call the corresponding three-dimensional profile template from the three-dimensional profile library according to the profile specification number, instantiate the three-dimensional profile template into the product assembly of the work, replace the three-dimensional profile template with the corresponding profile binding surface and the corresponding axis which meet the work requirement while instantiating the three-dimensional profile template, and finally obtain the instantiated profile part, as shown in fig. 4.
Based on the method for establishing the profile parts based on the three-dimensional profile library, the second aspect of the present application further provides a system for establishing the profile parts based on the three-dimensional profile library, the system comprising:
the three-dimensional section library is used for managing the three-dimensional section templates;
the section specification database is used for storing section specification parameters;
the association module is used for establishing the association relationship between the profile specification variable of the three-dimensional profile template and the profile specification parameters in the profile specification database;
and the instantiation module is used for instantiating the three-dimensional profile template in the three-dimensional profile library.
The method and the system for establishing the section parts based on the three-dimensional section library can quickly, standardly and accurately establish the section parts. The section modeling is based on a standard three-dimensional section library and a section specification database, so that the possibility that designers design models from the beginning and make mistakes manually is eliminated, design errors are avoided from a design source, and the design accuracy and the working efficiency are improved; the whole section modeling process reduces the dependence on designers, and is beneficial to the designers to quickly start up; the whole section modeling flow reduces design errors caused by manual intervention.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A method for establishing profile parts based on a three-dimensional profile library is characterized by comprising the following steps:
step one, creating an empty three-dimensional section library in a three-dimensional design platform;
step two, establishing a three-dimensional section template according to the section appearance binding surface, the section axis and the section specification characteristics, and ensuring that the section constraint size of the three-dimensional section template is in one-to-one correspondence with the section constraint size in a section specification manual;
step three, defining section specification variables of the three-dimensional section template, and establishing a one-to-one correspondence relationship between the section specification variables of the three-dimensional section template and section constraint sizes of the sections;
step four, establishing a section specification database according to section specification parameters in the section specification manual;
fifthly, importing the three-dimensional section template and the section specification database into the three-dimensional section library;
step six, establishing a one-to-one corresponding relation between the section specification variables of the three-dimensional section template and the section specification parameters in the section specification database;
and step seven, calling a corresponding three-dimensional section template from the three-dimensional section library according to the section specification parameters, and instantiating the three-dimensional section template according to the actual product appearance binding surface and the product axis to obtain the instantiated section part.
2. The method for building the profile parts based on the three-dimensional profile library according to claim 1, wherein in the second step, the three-dimensional profile templates with various section shapes are built according to the profile outer shape binding surface, the profile axis and the profile specification characteristics.
3. The method for building profile parts based on the three-dimensional profile library according to claim 2, wherein the three-dimensional profile template comprises an L-section three-dimensional profile template, a Z-section three-dimensional profile template and a T-section three-dimensional profile template.
4. The method for building profile parts based on the three-dimensional profile library according to claim 3, wherein in step three, the defining profile specification variables of the three-dimensional profile template and building the one-to-one correspondence relationship between the profile specification variables of the three-dimensional profile template and the profile section constraint dimensions comprise:
defining section specification variables of the L-shaped section three-dimensional section template comprise section height H, section width B, section thickness delta and section thickness delta1And profile rounding R;
establishing the one-to-one correspondence relationship between the section specification variables and the section constraint sizes of the section of the three-dimensional section template with the L-shaped section comprises the following steps:
the height H of the variable profile corresponds to the constraint size of the web height of the profile;
the width B of the variable section bar corresponds to the constraint size of the width of the section bar edge strip;
the variable profile thickness delta corresponds to the constraint size of the profile edge strip thickness;
variable section bar thickness delta1Constraint size corresponding to the thickness of the web of the profile;
the variable profile radius R corresponds to the constraint dimension of the radius at the profile inner corner.
5. The method for building profile parts based on three-dimensional profile library according to claim 1, wherein in step four, the profile specification parameters in the profile specification database comprise profile specification number, section height, section width, web thickness and bead thickness.
6. The method for building profile parts based on the three-dimensional profile library according to claim 5, wherein in step seven, the corresponding three-dimensional profile template is called from the three-dimensional profile library according to the profile specification number.
7. A system for building section parts based on a three-dimensional section library, which is based on the method for building section parts based on the three-dimensional section library of any one of claims 1 to 6, and is characterized by comprising:
the three-dimensional section library is used for managing the three-dimensional section templates;
the section specification database is used for storing section specification parameters;
the association module is used for establishing the association relationship between the profile specification variable of the three-dimensional profile template and the profile specification parameters in the profile specification database;
and the instantiation module is used for instantiating the three-dimensional profile template in the three-dimensional profile library.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101706837A (en) * | 2009-11-25 | 2010-05-12 | 南昌航空大学 | Mathematical model based method for establishing database of fixture components |
| CN105373636A (en) * | 2014-08-26 | 2016-03-02 | 南车株洲电力机车研究所有限公司 | Enterprise Windchill system based ProE standard part library construction method |
| CN106709984A (en) * | 2016-11-29 | 2017-05-24 | 中国航空工业集团公司沈阳飞机设计研究所 | L-extrusion profile three-dimensional modeling method used for establishing faying surface as complex surface |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706837A (en) * | 2009-11-25 | 2010-05-12 | 南昌航空大学 | Mathematical model based method for establishing database of fixture components |
| CN105373636A (en) * | 2014-08-26 | 2016-03-02 | 南车株洲电力机车研究所有限公司 | Enterprise Windchill system based ProE standard part library construction method |
| CN106709984A (en) * | 2016-11-29 | 2017-05-24 | 中国航空工业集团公司沈阳飞机设计研究所 | L-extrusion profile three-dimensional modeling method used for establishing faying surface as complex surface |
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