CN104850724B - Aircraft model quick design system and method - Google Patents
Aircraft model quick design system and method Download PDFInfo
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Abstract
The present invention relates to aircraft model quick design system and method, to improve aircraft model design efficiency, belongs to Aircraft tooling digitlization rapid design technology field.The system is built upon on existing CAD/CAM system platform, quickly designs that module, metal plate profile and expansion model quickly design module, model is added quick design module four part and formed by model design knowledge library module, large-sized structural parts exterior template；Aircraft model Fast design method, including following process：(1) large-sized structural parts receiver ga(u)ge designs；(2) metal plate profile, expansion model quickly design；(3) model adds quick design；The present invention is established on the basis of the digital model of part, model design knowledge and experience are summarized arrangement, establish the design standard of normalization, the design of interactive mode is changed into rapid design, model design time 75% can be shortened, design labor intensity reduces by 90%.
Description
Technical field
The present invention relates to a kind of quick design system and method for aircraft model, to improve aircraft model design efficiency,
Belong to Aircraft tooling digitlization rapid design technology field.
Background technology
Currently, the aircraft manufacturing system of domestic each Aviation Manufacturing Enterprises has been coordinated to be converted to digital quantity association comprehensively from analog quantity
Adjust.But associated digitalization test development is relatively slow, is difficult to protect in new machine development and small batch production process
Card in order production, therefore, the inspection in large-scale integral structure component at present, the conventional machining of machine-made spares, sheet metal part blanking and
Still largely model is used during the aircraft manufacturings such as inspection, milling processing.Current design is still relied on manually general
Interactive Design is carried out on CAD/CAM platforms, repeated workload is big, efficiency is low, normative deficiency, is mainly reflected in：(1) it is large-scale
Structural member receiver ga(u)ge designs：Per the about hundreds of items of type aircraft, need interaction structure thousands of in the position such as rib termination, sagging
Individual viewport, process is cumbersome, and viewport form is single, and repeated workload is big, every piece of 1~2 day model design cycle；(2) metal plate
Model designs：Per type aircraft items about up to ten thousand, including expansion model and exterior template, Bending edge height and angle calculation process it is cumbersome,
Size marking is more, and efficiency is low；(3) model is added：For adding technology information, reinforcement model intensity on finding model
Deng 80%~90% model needs to add, and quantity is big, and workload is big.Above mentioned problem have impact on aircraft manufacturing Operational preparation and enter
Journey, have become one of bottleneck factor for restricting new machine rapid development.At present, research both domestic and external has focused largely on aircraft model
Digital Design and Manufacture process aspect, and only have local exploration in the quick design aspect of model, quick design system is not formed.
The content of the invention
In order to solve above-mentioned problem, the present invention provides a kind of aircraft model quick design system and method, in fact
Existing technology is for example following：
A kind of aircraft model quick design system and method, the system are built upon on existing CAD/CAM system platform, by
Model design knowledge library module, large-sized structural parts exterior template quickly design module, metal plate profile and expansion model and quickly designed
Module, model add quick design module four part composition, wherein：
Described existing CAD/CAM platforms, provide platform for " aircraft model quick design system ", there is provided need to design
Input of the threedimensional model or X-Y scheme of model part as system, carry out data exchange with four modules of system and complete to have
The design objective of body, carry out the model design work outside systemic-function；
Described model design knowledge library module, it is the basis that the other modules of system are established, base support is provided for system
The interface that data, support data exchange with other module datas；Knowledge base includes the model design knowledge needed for system, there is provided
Straightaway annotation, it is allowed to which user modifies, and meets the needs of personal preference, special circumstances, subsequently change；Pass through foundation
Data exchange interface so that each module of system links together；
Described large-sized structural parts exterior template quickly designs module, the work created for viewport, is that part is projected
X-Y scheme processing, can to haplopia mouth as shown in Figure 1, close viewport, string viewport and viewport carry out effectively identification sentence
It is fixed, required viewport is automatically formed, for haplopia mouth, also provides single line, two-wire, three lines, the class difference viewport form of circular arc four；It is anti-
The only interference of line segment in small, broken bits, there is provided figure preprocessing function, it is fitted in the controllable error range of terminal and is in line, is round
Arc；
Described metal plate profile, expansion model quickly design module, for the structure and mark of metal plate model crimp data
Work, is both needed to handle, system identifies that metal plate is curved according to the web surface of sheet metal part to sheet metal part threedimensional model, two-dimensional projection
Side, the profile intersection of crimp and web surface is calculated, the angle spacing set according to user obtains the crimp at specific angle angle value
Angle line, and calculate corresponding Bending edge height；Finally, the crimp information calculated is imported into sheet metal component two-dimensional projection views
Middle automatic marking.
Described model adds quick design module, and design work is added for model, is the two dimension to part projection
The processing of figure, it can realize and standard as shown in Figure 2 is added, be long and narrow according to 1~2 point outside part projecting figure
Add, the quick design that pin is added, the quasi-representative of long and narrow viewport four is added.
The key technology method that aircraft model quick design system is realized is as follows：
Large-sized structural parts receiver ga(u)ge designs：Using part two-dimensional projection figure as input, figure is carried out first and is located in advance
Line segment in small, broken bits fitting is in line, circular arc by reason, system according to the error amount of input；Then regarded in a manner of based on pivot
Mouth creates, described pivot, refers to the curve that need to create viewport inspection, and its basic step realized is<1>Pivot identifies；<2>
Pivot is grouped；<3>Viewport is built：
Described<1>Pivot identifies, recessed according to curve using a part for single viewport position or projecting figure as input
Convexity, length and adjacent curve annexation automatic identification viewport pivot；
Described<2>Pivot be grouped, by closest to cut it is continuous in a manner of each viewport pivot is entered row bound expand, it is advanced
Row series connection, judges whether to close, then carries out parallel connection again, formed haplopia mouth, go here and there viewport, close viewport and simultaneously viewport pivot, go forward side by side
Row packet；
Described<3>Viewport is built, and according to the type and pivot of viewport, enters row bound expansion again, according to design knowledge
Member length extraction circle of boundary member defined in storehouse, and broken string operation is carried out, form final viewport.
Metal plate profile, expansion model quickly design, crimp angle, highly calculate and mark it is basic and crucial be that metal plate is curved
The identification of side feature, the metal plate crimp characteristic recognition method based on sex is proposed for this, it is curved to establish metal plate on this basis
The structure and mark of side data.Its basic step is<1>Crimp fillet identifies；<2>Hollows are grouped；<3>Crimp face identifies；<4
>Crimp feature construction：<5>Crimp data are built；<6>Crimp marks；
Described<1>Crimp fillet identifies：The web surface of sheet metal part is chosen in interaction, extracts topological side and the abdomen of web surface
The common frontier juncture connection face of plate face, plane and web surface and its common frontier juncture connection face phase are created perpendicular to common edge in common edge midpoint
Hand over, the trimming of extraction plano-convex, the common frontier juncture connection face of plano-concave trimming, be identified as crimp hollows；
Described<2>Hollows are grouped：The crimp hollows that web surface associates are grouped, principle is when a fillet
There is common edge in face, then the two faces belong to same group with another hollows；
Described<3>Crimp face identifies：The most outer shroud of crimp hollows group is extracted, removes the topological side of web surface and convex
Side, the manifold of remaining sideline association is crimp face；
Described<4>Crimp feature construction：Hollows group crimp face associated with it is merged and forms crimp feature；
Described<5>Crimp data are built：Simulate interactive building mode, the extension intersection of crimp face and web surface is
Profile intersection；For point on profile intersection, here perpendicular to the plane of profile intersection, formed with web surface, crimp face intersection
Angle be crimp angle at this point, web surface and the distance of crimp face intersection distal end are Bending edge height, according to dichotomy
Quickly determine position corresponding to specific crimp angle value；By obtained crimp data storage in the three-dimensional model；
Described<6>Crimp marks：In Graphing of Engineering, according to the rule of correspondence of curve, by the crimp in threedimensional model
Information is imported and is labeled.
Model adds quick design, is under engineering chart-pattern, adds type according to selected, the side quickly designed
Method, its basic procedure are<1>Key point determines；<2>Subpoint is built；<3>Add side extraction；<4>Add structure：
Described<1>Key point determines：Interact and click in the white space that model closes on, it is believed that this position is key point；
Described<2>Subpoint is built：On the basis of key point, projected toward model border, pickup distance is minimum simultaneously
And belong to the subpoint put in projection side；
Described<3>Add side extraction：The border of model is reduced with two subpoints, and extracts the part for closing on key point
As adding side；
Described<4>Add structure：On the basis of adding side, key point, subpoint are sequentially connected, completes adding for model
Structure.
Beneficial effects of the present invention：The present invention is established on the basis of the digital model of part, by model design knowledge and
Experience is summarized arrangement, establishes the design standard of normalization, and the design of interactive mode is changed into rapid design, can shorten sample
Plate design time 75%, design labor intensity reduce by 90%.
Brief description of the drawings
Fig. 1 (a)-Fig. 1 (f) is typical viewport schematic diagram.
Fig. 2 (a) is that standard adds schematic diagram.
Fig. 2 (b) typical cases add schematic diagram.
Fig. 3 aircraft model quick design system structure charts.
Fig. 4 large-sized structural parts receiver ga(u)ge design flow diagrams.
Fig. 5 metal plates profile, the expansion quick design flow diagram of model.
Fig. 6 models add quick design flow diagram.
Embodiment
Aircraft model quick design system and method (such as Fig. 3), the system are built upon existing CAD/CAM system platform
On, by model design knowledge library module 1., large-sized structural parts exterior template quickly design module 2., metal plate profile and expansion model
Quick design module 3., model add quick design module and 4. form four parts, wherein：
Described existing CAD/CAM platforms, provide platform for " aircraft model quick design system ", there is provided need to design
Input of the threedimensional model or X-Y scheme of model part as system, carry out data exchange with four modules of system and complete to have
The design objective of body, carry out the model design work outside systemic-function；
1. described model design knowledge library module, is the basis that the other modules of system are established, basis branch is provided for system
The interface that support data, support data exchange with other module datas；Knowledge base includes the model design knowledge needed for system, carries
For straightaway annotation, it is allowed to which user modifies, and meets the needs of personal preference, special circumstances, subsequently change；By building
Vertical data exchange interface so that each module of system links together；
2. described large-sized structural parts exterior template quickly designs module, the work created for viewport, is that part is thrown
The processing of the X-Y scheme of shadow, can to haplopia mouth as shown in Figure 1, close viewport, string viewport and viewport carry out effectively identification sentence
It is fixed, required viewport is automatically formed, for haplopia mouth, also provides single line, two-wire, three lines, the class difference viewport form of circular arc four；It is anti-
The only interference of line segment in small, broken bits, there is provided figure preprocessing function, it is fitted in the controllable error range of terminal and is in line, is round
Arc；
3. described metal plate profile, expansion model quickly design module, for the structure and mark of metal plate model crimp data
Work is noted, sheet metal part threedimensional model, two-dimensional projection are both needed to handle, system identifies that metal plate is curved according to the web surface of sheet metal part
Side, the profile intersection of crimp and web surface is calculated, the angle spacing set according to user obtains the crimp at specific angle angle value
Angle line, and calculate corresponding Bending edge height；Finally, the crimp information calculated is imported into sheet metal component two-dimensional projection views
Middle automatic marking.
4. described model adds quick design module, design work is added for model, is two to part projection
The processing of figure is tieed up, can be realized according to 1-2 point outside part projecting figure to the mark as shown in Fig. 2 (a), Fig. 2 (b)
Standard adds, it is long and narrow add, the quick design that pin is added, the quasi-representative of long and narrow viewport four is added.
The key technology method that aircraft model quick design system is realized is as follows：
Large-sized structural parts receiver ga(u)ge designs (such as Fig. 4)：Using part two-dimensional projection figure as input, figure is carried out first
Shape pre-processes S1, and line segment in small, broken bits fitting is in line, circular arc by system according to the error amount of input；Then with the side based on pivot
Formula carries out viewport establishment, and described pivot refers to the curve that need to create viewport inspection, and its basic step realized is<1>Pivot
Identify S2；<2>Pivot is grouped S3；<3>Viewport builds S4：
Described<1>Pivot identifies S2, using a part for single viewport position or projecting figure as input, according to curve
Concavity and convexity, length and adjacent curve annexation automatic identification viewport pivot；
Described<2>Pivot be grouped S3, by closest to cut it is continuous in a manner of each viewport pivot is entered row bound expand, first
Connected, judge whether to close, then carry out parallel connection again, formed haplopia mouth, go here and there viewport, close viewport and simultaneously viewport pivot, and
It is grouped；
Described<3>Viewport builds S4, according to the type and pivot of viewport, enters row bound expansion again, knows according to design
Know member length extraction circle of the boundary member defined in storehouse, and carry out broken string operation, form final viewport.
Metal plate profile, expansion model quickly design (such as Fig. 5), crimp angle, highly calculate and mark it is basic and crucial
It is the identification of metal plate crimp feature, the metal plate crimp characteristic recognition method based on sex is proposed for this, is built on this basis
The structure and mark of vertical metal plate crimp data.Its basic step is<1>Crimp fillet identifies S5；<2>Hollows are grouped S6；<3>
Crimp face identifies S7；<4>Crimp feature construction S8：<5>Crimp data build S9；<6>Crimp marks S10；
Described<1>Crimp fillet identifies S5：Interaction choose sheet metal part web surface, extract web surface topological side and
The common frontier juncture connection face of web surface, plane and web surface and its common frontier juncture connection face phase are created perpendicular to common edge in common edge midpoint
Hand over, the trimming of extraction plano-convex, the common frontier juncture connection face of plano-concave trimming, be identified as crimp hollows；
Described<2>Hollows are grouped S6：The crimp hollows that web surface associates are grouped, principle is when a circle
There is common edge in edged surface, then the two faces belong to same group with another hollows；
Described<3>Crimp face identifies S7：The most outer shroud of crimp hollows group is extracted, removes the topological side of web surface and convex
Side, the manifold of remaining sideline association is crimp face；
Described<4>Crimp feature construction S8：Hollows group crimp face associated with it is merged and forms crimp spy
Sign；
Described<5>Crimp data build S9：Simulate the extension intersection of interactive building mode, crimp face and web surface
For profile intersection；For point on profile intersection, here perpendicular to the plane of profile intersection, with web surface, crimp face intersection shape
Into angle be crimp angle at this point, web surface and the distance of crimp face intersection distal end are Bending edge height, according to two points
Method quickly determines position corresponding to specific crimp angle value；By obtained crimp data storage in the three-dimensional model；
Described<6>Crimp marks S10：, will be curved in threedimensional model according to the rule of correspondence of curve in Graphing of Engineering
Side information is imported and is labeled.
Model adds quick design, is under engineering chart-pattern, adds type according to selected, the side quickly designed
Method, its basic procedure such as Fig. 6, including<1>Key point determines S11；<2>Subpoint builds S12；<3>Add side extraction S13；<4>
Add structure S14：
Described<1>Key point determines S11：Interact and click in the white space that model closes on, it is believed that this position is crucial
Point；
Described<2>Subpoint builds S12：On the basis of key point, projected toward model border, pickup distance is minimum
And belong to the subpoint put in projection side；
Described<3>Add side extraction S13：The border of model is reduced with two subpoints, and extracts and closes on key point
Part is used as and adds side；
Described<4>Add structure S14：On the basis of adding side, key point, subpoint are sequentially connected, completes model
Add structure.
Claims (2)
1. aircraft model quick design system, establish on existing CAD/CAM system platform, it is characterised in that：The system is by sample
Plate design knowledge library module, large-sized structural parts exterior template quickly design module, metal plate profile, expansion model and quickly design mould
Block, model add quick design module four part composition；
Described model design knowledge library module, provide base support data, support data and other module datas for system and hand over
The interface changed；By establishing data exchange interface so that each module of system links together；
Described large-sized structural parts exterior template quickly designs module, for handling the X-Y scheme that part projects, pin
To haplopia mouth, viewport, string viewport and the effective identification decision of viewport progress are closed, required viewport is automatically formed, for haplopia mouth, goes back
Single line, two-wire, three lines, the class difference viewport form of circular arc four are provided, there is figure preprocessing function, can be in the controllable error of terminal
In the range of by line segment in small, broken bits fitting be in line, circular arc；
Described metal plate profile, expansion model quickly design module, for realizing the structure and mark of metal plate model crimp data
Work, handles sheet metal part threedimensional model, two-dimensional projection, can identify metal plate crimp, and calculate crimp and web
The profile intersection in face, crimp angle line, Bending edge height；It is and crimp and the profile intersection of web surface, crimp angle line, crimp is high
Degree information, which is imported in sheet metal component two-dimensional projection views, realizes automatic marking；
Described model adds quick design module, and design work is added for model, the X-Y scheme projected to part
Processing, can according to 1-2 point outside part projecting figure, realize standard is added, it is long and narrow add, pin is added, long and narrow
The quick design that the quasi-representative of viewport four is added.
2. aircraft model Fast design method, it is characterised in that including following process：
(1) large-sized structural parts receiver ga(u)ge designs；
(2) metal plate profile, expansion model quickly design；
(3) model adds quick design；
Described (1) large-sized structural parts receiver ga(u)ge design：Detailed process is：Using part two-dimensional projection figure as input,
Figure pretreatment is carried out first, and line segment in small, broken bits fitting is in line, circular arc by system according to the error amount of input；Then with based on
The mode of pivot carries out viewport establishment；Described pivot, refers to the curve that need to create viewport inspection, and its basic step realized is
<1>Pivot identifies；<2>Pivot is grouped；<3>Viewport is built；
Described<1>Pivot identifies, concavo-convex according to curve using a part for single viewport position or projecting figure as input
Property, length and adjacent curve annexation automatic identification viewport pivot；
Described<2>Pivot be grouped, by closest to cut it is continuous in a manner of each viewport pivot is entered row bound expand, first gone here and there
Connection, judges whether to close, and then carries out parallel connection again, formed haplopia mouth, go here and there viewport, close viewport and simultaneously viewport pivot, and divided
Group；
Described<3>Viewport is built, and according to the type and pivot of viewport, enters row bound expansion again, according in design knowledge base
Member length extraction circle of the boundary member of definition, and broken string operation is carried out, form final viewport；
Described (2) metal plate profile, expansion model quickly design, including crimp angle, the basis that highly calculates and mark and close
Key is the identification of metal plate crimp feature, the metal plate crimp characteristic recognition method based on sex is proposed for this, on this basis
Establish the structure and mark of metal plate crimp data；Its basic step is<2.1>Crimp fillet identifies；<2.2>Hollows are grouped；<
2.3>Crimp face identifies；<2.4>Crimp feature construction：<2.5>Crimp data are built；<2.6>Crimp marks；
Described<2.1>Crimp fillet identifies：The web surface of sheet metal part is chosen in interaction, extracts topological side and the web of web surface
The common frontier juncture connection face in face, create plane perpendicular to common edge in common edge midpoint and intersect with web surface and its common frontier juncture connection face,
The common frontier juncture connection face on plano-convex trimming peace recessing side is extracted, is identified as crimp hollows；
Described<2.2>Hollows are grouped：The crimp hollows that web surface associates are grouped, principle is when a hollows
Common edge be present with another hollows, then the two faces belong to same group；
Described<2.3>Crimp face identifies：The most outer shroud of crimp hollows group is extracted, removes topological side and the chimb of web surface,
The manifold of remaining sideline association is crimp face；
Described<2.4>Crimp feature construction：Hollows group crimp face associated with it is merged and forms crimp feature；
Described<2.5>Crimp data are built：The extension intersection of the interactive building mode of simulation, crimp face and web surface is outer
Shape intersection；For point on profile intersection, here perpendicular to the plane of profile intersection, formed with web surface, crimp face intersection
Angle is the crimp angle at this point, and web surface and the distance of crimp face intersection distal end are Bending edge height, fast according to dichotomy
Speed determines position corresponding to specific crimp angle value；By obtained crimp data storage in the three-dimensional model；
Described<2.6>Crimp marks：In Graphing of Engineering, according to the rule of correspondence of curve, the crimp in threedimensional model is believed
Breath importing is labeled；
Described (3) model adds quick design, is under engineering chart-pattern, adds type according to selected, quickly set
The method of meter, its basic procedure are<3.1>Key point determines；<3.2>Subpoint is built；<3.3>Add side extraction；<3.4>Mend
Add structure；
Described<3.1>Key point determines：Interact and click in the white space that model closes on, it is believed that this position is key point；
Described<3.2>Subpoint is built：On the basis of key point, projected toward model border, pickup distance it is minimum and
Belong to the subpoint put in projection side；
Described<3.3>Add side extraction：The border of model is reduced with two subpoints, and extracts the part work for closing on key point
To add side；
Described<3.4>Add structure：On the basis of adding side, key point, subpoint are sequentially connected, that completes model adds structure
Build.
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| CN106960474B (en) * | 2017-04-25 | 2020-07-14 | 王征 | System and method for automatically calculating height of 3D model after movement based on height detector |
| CN106926211A (en) * | 2017-04-27 | 2017-07-07 | 沈阳飞机工业（集团）有限公司 | A kind of model with measurement auricle |
| CN107378418B (en) * | 2017-06-22 | 2019-03-19 | 哈尔滨飞机工业集团有限责任公司 | A kind of honeycomb method of deploying |
| CN112883482B (en) * | 2020-12-12 | 2022-05-06 | 江西洪都航空工业集团有限责任公司 | Rapid design method of aircraft sheet metal part checking fixture |
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