CN104462656A - Method for recognizing features of aircraft skin parts - Google Patents
Method for recognizing features of aircraft skin parts Download PDFInfo
- Publication number
- CN104462656A CN104462656A CN201410636421.3A CN201410636421A CN104462656A CN 104462656 A CN104462656 A CN 104462656A CN 201410636421 A CN201410636421 A CN 201410636421A CN 104462656 A CN104462656 A CN 104462656A
- Authority
- CN
- China
- Prior art keywords
- face
- feature
- seed
- reverse side
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a method for recognizing features of aircraft skin parts. The method comprises the following steps that firstly, the structural features and machining characteristics of the aircraft skin parts are analyzed, and various skin machining features are defined; secondly, the skin parts are preset, a loop characteristic diagram and a holographic attribute face-edge graph are constructed, seed faces of the skin machining features are defined, and the seed faces of the features are searched for based on the loop characteristic diagram and the holographic attribute face-edge graph; thirdly, searching is carried out based on back identification faces, the seed faces and an expansion rule, all geometrical elements of the features are searched for, and the skin machining features are constructed; fourthly, various kinds of feature information are extracted, and a feature recognition result is obtained. The feature types of aircraft skin part milling can be covered, recognition efficiency and accuracy are high, a foundation is laid for high efficiency and automation of skin machining, and meanwhile an effective means are provided for data transmission between CAD/CAPP/CAM systems.
Description
Technical field
The present invention relates to a kind of CAD/CAM technology, especially a kind of CAD/CAM technology improving aircraft skin part level of processing, specifically a kind of aircraft skin part feature recognition methods.
Background technology
At present, CAD, CAPP, CAM system has played very large effect respectively in product design, technological design and numerical control programming.But these systems are independent separately, the automatic conversion of the information that can not realize between each system and sharing, in application process automaticity and efficiency low.To improve the integrated active demand becoming industry member of CAD/CAPP/CAM for the purpose of product design, technological design and numerical control programming automaticity and efficiency, and feature can as the carrier of processing technology knowledge and experience, effective succession processing technology knowledge and experience, the data transmission that can realize between each system by feature, realizes CAD/CAPP/CAM integrated.
Feature based can realize numerical control program establishment rapidly and efficiently, and feature identification is the basis of the quick journey volume technology of feature based.So feature identification technique becomes the important means improving aircraft skin part by numerical control programming efficiency and quality.
And belong to single part or hyperbolic part due to skin part, there is the situation of Varying-thickness, even variable cross section especially in the skin part at its head and tail place, a lot of broken is also had except variable curvature, difficulty is brought to feature identification, in existing feature identification technique, not for the curvature part with intersecting features, do not cover aircraft skin part feature type, also cannot to the situation process having broken, so also there is no efficient recognition methods to the feature identification of aircraft skin.
Summary of the invention
The object of the invention is the feature recognition function lacking aircraft skin for current feature identification technique, to this present situation of broken process, a kind of aircraft skin characteristic recognition method cannot be invented.
Technical scheme of the present invention is:
The recognition methods of a kind of aircraft skin part feature, it is characterized in that, it comprises the following steps:
The first, analysis of aircraft stressed-skin construction feature and processing characteristics, define all kinds of covering machining feature;
The second, aircraft skin part pre-seted and builds ring property figure and holographic attribute face edge graph, pre-seting and mainly comprise: setting up Cutter coordinate system, selected reverse side identified surface and part model input; Define the seed face of all kinds of covering machining feature, search for the seed face of each category feature based on ring property figure and holographic attribute face edge graph;
3rd, process is optimized to the seed face with broken, then searches for based on reverse side identified surface, seed face and expansion rule, search out all geometric elements of each category feature, construct covering machining feature;
4th, extract all kinds of characteristic information, obtain feature recognition result.
Of the present invention by analysis of aircraft skin part design feature and processing characteristics, the geometrical body with process similarity and geological information is defined as covering machining feature and comprises sagging, the logical window of definition, hole and contour feature.Undercut nature is the shallow slot on covering, mainly comprises end face, face, base angle and bottom surface, the bottom surface of undercut nature is defined as the seed face of undercut nature; Logical window feature is position covering needing adopt Milling Process milling to wear, show as the manhole of diameter comparatively large (being usually greater than 20mm) or irregular hole in shape, mainly comprise wall, end face and bottom surface, the bottom surface of logical window feature is defined as the seed face of logical window feature; Hole characteristic covering needs adopt drilling to process the position drilled through, show as the manhole of diameter less (being usually less than or equal to 20mm) in shape, mainly comprise wall, end face and bottom surface, the bottom surface of hole characteristic is defined as the seed face of hole characteristic; Contour feature is the theoretical profile border of skin part, is used as the guide line of trimming programming, mainly comprises contoured surface, reverse side identified surface is defined as the seed face of profile.
The basis for selecting of described reverse side identified surface is: definition to be processed of skin part is front, and the face of vis-a-vis is reverse side, and any one face in covering reverse side chosen is as reverse side identified surface.
The described seed face searching for each category feature based on ring property figure and holographic attribute face edge graph refers to based on ring property figure and holographic attribute face edge graph, analyze ring property and the topological connection relation in face simultaneously, expand out meet all kinds of feature seed face ring property and topological connection relation feature face as the seed face of each category feature.Ring property figure refers to the ring property had by analysis face, constructs ring property figure, and ring property mainly refers to or without inner ring, has several inner ring, each inner ring has the characteristics such as how many inner ring limits respectively.
Described first whether to be connected according to curved surface when process is optimized to broken face, curvature whether continuously and the whether identical Rule of judgment of thickness, search out the curved surface met the demands, broken is considered as by there being the curved surface of associated relation, be optimized process, and form complete feature to replace original broken region feature, ensure the accuracy of undercut nature identification.
First described undercut nature finds all fronts according to reverse side identified surface when building, expand rule traversal front according to seed face of sinking and obtain correct sagging seed face, seed face expansion of sinking is regular: the front of definition containing inner ring is intermediate surface, will only containing outer annular edge front and and and disjunct of intermediate surface expand for sink bottom surface, correct face, base angle is found in seed face according to sinking, and correct sagging end face is found in the sagging face, base angle of recycling.The required undercut nature information spinner extracted will comprise: the numbering of sinking, thickness, bottom surface, face, base angle and end face.
First described logical window and hole characteristic find all reverse side according to reverse side identified surface when building, and obtains curved surface with inner ring limit as the seed face of logical window feature and hole characteristic by traversal reverse side.Wherein, inner ring limit quantity is greater than the reverse side of 2 or inner ring limit quantity equals 2 and the reverse side that diameter is greater than 20mm is expanded as logical window seed face; Inner ring limit quantity is equaled 2 and the reverse side that diameter is less than or equal to 20mm is expanded as seed face, hole.Find correct wall according to seed face again, then find correct end face according to wall.The required logical window characteristic information extracted mainly comprises: the numbering of logical window, the logical window degree of depth, bottom surface, wall and end face; The required hole characteristic information spinner extracted will comprise: axial, accuracy class, the tolerance in the numbering in hole, bottom surface, wall, end face, bore dia, hole depth, hole site, hole.
First described contour feature finds all reverse side according to profile seed face when building, more all faces that search is adjacent with reverse side, obtains all sides, more from the side in remove the wall of hole and logical window, namely obtain all contoured surfaces.The required contour feature information spinner extracted will comprise: profile numbering, contoured surface, accuracy class.
Beneficial effect of the present invention:
The present invention can contain the characteristic type of aircraft skin part Milling Process, and recognition efficiency is high, and accuracy is high, lays a good foundation, for the data transmission between CAD/CAPP/CAM system provides effective means for improving covering process automation level.
Accompanying drawing explanation
Fig. 1 is aircraft skin part feature recognition methods process flow diagram of the present invention.
Fig. 2 is the aircraft skin part schematic diagram of the embodiment of the present invention, and wherein 1 is sagging, and 2 is logical window, and 3 is hole, and 4 is profile.Skin part forms primarily of these structures.
Fig. 3 is undercut nature definition schematic diagram, and wherein C is bottom surface of sinking, and D is face, base angle of sinking, and E is the end face that sink, and each sinking is made up of a bottom surface, several faces, base angle and an end face.
Fig. 4 is logical window characterizing definition schematic diagram, and wherein F is logical window bottom surface, and G is logical window wall, and H is logical window end face, W
edgefor logical window top face profiles silhouette edge, each logical window is made up of a bottom surface, several walls, an end face and some silhouette edges.
Fig. 5 is hole characteristic definition schematic diagram, and wherein I is bottom surface, hole, and J is wall surface of the hole, and K is hole end face, and each Kong Youyi bottom surface, several walls and an end face are formed.
Fig. 6 is the ring property figure in a face, wherein L
1and L
2for two rings that this face has, L
1there are 8 inner ring limits, L
2there are 2 inner ring limits.
Fig. 7 is undercut nature partial holography attribute face edge graph, wherein f
1for sagging bottom surface, and with limit e
1, e
2, e
3, e
4, e
5, e
6, e
7, e
8be connected with face, 8 base angles, such as limit e
1, e
2respectively with face, base angle f
2, f
3be connected, face f
2, f
3with limit e
9connected, face, base angle f
3with sagging end face f
4with limit e
10be connected.
Fig. 8 is the unique identification schematic diagram of undercut nature topology element, utilizes tag value to identify each element type.
Fig. 9 is broken sagging schematic diagram.
Figure 10 is undercut nature identification process figure.
Figure 11 is logical window feature identification process figure.
Figure 12 is hole characteristic identification process figure.
Figure 13 is aircraft skin part feature recognition result schematic diagram, and wherein feature recognition result can stored in the file of XML format.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in figures 1-13.
Process flow diagram as shown in Figure 1.Concrete steps are as follows:
1, analysis of aircraft skin part architectural characteristic and processing characteristic, definition undercut nature, logical window feature, hole characteristic and contour feature.
Aircraft skin part (hereinafter referred to as covering) structure exist a large amount of sagging, logical windows and hole, as shown in Figure 2, by to its architectural characteristic and representative process method analysis, covering machining feature is summarized as: undercut nature, logical window feature, hole characteristic and contour feature.
1) undercut nature (Subsidence): sink the shallow slot referred on covering, as shown in Figure 3, each sinking is made up of bottom surface, face, base angle and end face, the bottom surface of wherein sinking, as shown in C in Fig. 3, base angle is looked like in Fig. 3 shown in D, and end face is as shown in E in Fig. 3.
To sink geometry characteristic and exemplary process in conjunction with covering, undercut nature (S) be defined as:
S＝S
Geo∪S
Attr
S
Geo＝S
top∪S
base∪S
bottom
S
georepresent the geological information of undercut nature, wherein S
top, S
base, S
bottomrepresent the end face of undercut nature, face, base angle, bottom surface respectively; S
attrthe type of represent the non-geometric parameter information of undercut nature, comprising sink numbers, sinking and the design thickness of sagging bottom surface.
2) logical window feature (Window): logical window refers to the circular hole that irregular hole that skin part needs milling to wear or diameter are greater than 20mm, as shown in Figure 4, each logical window is made up of wall, end face, bottom surface and top surface profile limit, the wherein bottom surface of logical window, as shown in F in Fig. 4, wall is as shown in G in Fig. 4, and end face is as shown in H in Fig. 4, and top surface profile limit is as W in Fig. 4
edgeshown in.
Lead to window geometry characteristic and exemplary process in conjunction with covering, window feature (W) will be led to and be defined as:
W＝W
Geo∪W
Attr
W
Geo＝W
side∪W
top∪W
bottom∪W
topedge
W
georepresent the geological information of logical window feature, wherein W
side, W
top, W
bottom, W
topedgerepresent the wall of logical window feature, end face, bottom surface, top surface profile limit respectively; W
attrrepresent the non-geometric parameter information of logical window feature, comprise the degree of depth that logical window is numbered and led to window.
3) hole characteristic (Hole): hole refers on skin part needs the diameter drilled through to be less than or equal to the manhole of 20mm, as shown in Figure 5, each hole is made up of wall, end face, bottom surface, the bottom surface of its mesopore, as shown in I in Fig. 5, wall is as shown in J in Fig. 5, and end face is as shown in J in Fig. 5.
In conjunction with covering bore geometry characteristic and exemplary process, hole characteristic (H) is defined as:
H＝H
Geo∪H
Attr
H
Geo＝H
side∪H
top∪H
bottom
H
georepresent the geological information of hole characteristic, wherein H
side, H
top, H
bottomrepresent the wall of hole characteristic, end face, bottom surface respectively; H
attrrepresent the non-geometric parameter information of hole characteristic, comprise axial, accuracy class, the tolerance in hole numbering, bore dia, hole depth, hole site, hole.
4) contour feature (Profile): profile refers to the theoretical profile border of skin part, is used as the guide line of trimming programming.A skin part only has a contour feature, and as indicated with 4 in fig. 2, the contoured surface all by skin shape is formed.
In conjunction with covering profile geometry characteristic and exemplary process, contour feature (P) is defined as:
P＝P
Geo∪P
Attr
P
Geo＝P
profile
P
georepresent the geological information of contour feature, wherein P
profilerepresent the wall of contour feature, end face, bottom surface; P
attrrepresent the non-geometric parameter information of contour feature, comprise the accuracy class of profile numbering, contoured surface.
2, skin part pre-seted and build ring property figure and holographic attribute face edge graph
1) part model is pre-seted, set up Cutter coordinate system, selected reverse side identified surface and part model input definition.Wherein the basis for selecting of reverse side identified surface is: definition to be processed of skin part is front, and the face of vis-a-vis is reverse side, chooses any one face in covering reverse side.
2) all point, line, surface topology elements of cad model are obtained, topology element is renamed according to the mode of topological classification+identification code, as shown in Figure 8, give each topology element specific identification code, make topology element have uniqueness, be convenient to follow-up feature identification and the preservation of feature recognition result.
3) the ring property figure of covering model is built.
Ring property figure is that the ring property had by analysis face constructs ring property figure, and ring property mainly refers to or without inner ring, has several inner ring herein, each inner ring has the characteristics such as how many inner ring limits respectively, and its content comprises:
The information in face: the unique identification in face, the inner ring edge strip number with or without inner ring, inner ring number, each inner ring, as shown in table 1.
Table 1
As shown in Figure 6, utilize ring property figure, clearly can give expression to inner ring contained by a face and the inner ring limit contained by each inner ring.
4) the holographic attribute face edge graph of covering model is built.
Holographic attributed graph adds the information on more limits for feature identification and the information in face on the basis of attribute face edge graph, and its content comprises:
The information on limit: the unique identification on limit, limit belong to inner ring or outer shroud mark, adjacent surface angle, corner degree, edge lengths, as shown in table 2;
Table 2
The information in face: the unique identification in face, curved surface or plane mark, the quantity of phase cross surface, the area in face, the inner and outer ring number in face, as shown in table 3.
Table 3
Utilize the annexation between the topology information of all geometric elements required for the edge graph representation feature identification of holographic attribute face and each element, as shown in Figure 7, by introducing corner degree, face angle clearly can express the annexation between face and face, wherein corner degree can represent the conversion relations of two adjacent surfaces, and face angle can represent the position relationship of two adjacent surfaces.
3, carry out faceted search based on reverse side identified surface, seed face and expansion rule, build machining feature
1) machining feature seed face definition: the seed face of undercut nature is the bottom surface of undercut nature, as shown in C in Fig. 3; The seed face of the logical window feature of definition is the bottom surface of logical window feature, as shown in F in Fig. 4; The seed face of definition hole characteristic is the bottom surface of hole characteristic, as shown in I in Fig. 5.
2) based on the selection of reverse side identified surface and the definition of seed face, the holographic attribute face edge graph of traversal covering model, carries out seed face coupling, specific as follows:
(1) all of covering model is obtained stored in face row BodyFaces, ergodic surface row BodyFaces, all covering reverse side are extracted according to reverse side identified surface, stored in face row BackFaces, further ergodic surface row BackFaces, search for the face adjacent with reverse side, namely all sides are obtained, stored in face row SideFaces, the face that removal reverse side and side are left is front, stored in face row FrontFaces, ergodic surface row FrontFaces, the front of definition containing inner ring is intermediate surface, stored in face row MidLayerFaces, travel through all reverse side again, there is the reverse side of inner ring stored in face row F
f.
(2) travel through all fronts, only have the front of outer shroud and and disjunct of intermediate surface, then stored in face row LS
seed, traversal of lists LS
seed, to search out in list all broken, and mate to merge respectively again to broken face and form seed face and leave list S in
seedin, concrete grammar is as follows: at list LS
seedin take out arbitrarily a face S1 and also search for the face be adjacent, then the corner degree in calculating two faces and face angle respectively, corner degree A1 is in two phase cross surfaces and respectively draws straight line and meet at same point on intersection, the angle of two straight lines of gained.Face angle F1 is the angle of two phase cross surface Central Point Method vectors, if corner degree satisfies condition: A1 ≈ 0 ° or A1 ≈ 180 °, face angle satisfies condition: F1 ≈ 0 ° or F1 ≈ 180 °, the face that then search is adjacent with adjacent surface, just continues search if do not satisfied condition, until search is less than the face met the demands, the face of search is left in list L1, judge the number in face in L1, if number equals 1, then leave S1 in S
seedin, if number is greater than 1, then the face in list L1 is merged, then leave the face of merging in S
seedin.By the face in list L1 at list LS
seedmiddle removing, and list L1 is emptied, then repeat aforesaid operations, final acquisition seed face list S
seed.
(3) F is traveled through
fall, obtain all inner ring, stored in limit row E
in, limit row number be greater than 2 or limit row number equal 2 and limit row form circle diameter be greater than 20mm then stored in limit row W
in, limit row number equals 2 and the circle diameter that limit row are formed is less than or equal to 20mm then stored in limit row H
in, limit row W
inthe face at place is stored in W
seed, limit row H
inthe face at place is stored in H
seed, i.e. W
seedfor logical window feature seed face row, i.e. H
seedfor hole characteristic seed face row.
4) with the sagging seed face S obtained
seedexpand, build complete undercut nature, particular flow sheet as shown in Figure 10.
(1) S is taken out
seedfirst face, a new definition undercut nature, traversal face, front row FrontFaces, searches for the face be connected with seed face, is face, sagging base angle, as shown in D in Fig. 3.
(2) travel through front FrontFaces, search for the face be connected with face, base angle, namely obtain sagging end face, as shown in E in Fig. 3.Namely a complete undercut nature is constituted, stored in undercut nature list SubsidenceList by bottom surface, face, base angle, end face.
(3) S is taken out
seedsecond face, circulation step (1) (2), the rest may be inferred, takes out S
seed3rd face ... until take out S
seedlast face, circulation step (1) (2), obtain the preliminary recognition result of undercut nature.
5) with the logical window seed face W obtained
seedexpand, build complete logical window feature, particular flow sheet as shown in figure 11.
(1) W is taken out
seedfirst face, a new definition logical window feature, travels through all BodyFaces, searches for the face be connected with seed face, be logical window wall, as shown in G in Fig. 5.
(2) travel through front FrontFaces, search for the face be connected with wall, be logical window end face, as shown in H in Fig. 4, take out the appearance profile limit of end face, as W in Fig. 4
edgeshown in.Namely a complete logical window feature is constituted, stored in logical window feature list WindowList by bottom surface, wall, end face, top surface profile limit.
(3) W is taken out
seedsecond face, circulation step (1) (2), the rest may be inferred, takes out W
seed3rd face ... until take out W
seedlast face, circulation step (1) (2), namely the identification of logical window feature complete.
6) with seed face, the hole H obtained
seedexpand, build complete hole characteristic, particular flow sheet as shown in figure 12.
(1) H is taken out
seedfirst face, a new definition hole characteristic, travels through all BodyFaces, searches for the face be connected with seed face, be wall surface of the hole, as shown in J in Fig. 5.
(2) travel through front FrontFaces, search for the face be connected with wall, be hole end face, as shown in K in Fig. 5.Namely a complete hole characteristic is constituted, stored in hole characteristic list HoleList by bottom surface, wall, end face.
(3) H is taken out
seedsecond face, circulation step (1) (2), the rest may be inferred, takes out H
seed3rd face ... until take out H
seedlast face, circulation step (1) (2), namely the identification of hole characteristic complete.
7) skin part only has a contour feature, the wall of porose and logical window reject from all side SideFaces, remaining face is all contoured surfaces of contour feature.
4, extraction process undercut nature, undercut nature, logical window feature, hole characteristic and contour feature information, obtain feature recognition result, recognition result can stored in XML file, and partial recognition result sectional drawing as shown in figure 13.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (8)
1. the recognition methods of aircraft skin part feature, is characterized in that, it comprises the following steps:
The first, analysis of aircraft stressed-skin construction feature and processing characteristics, define all kinds of covering machining feature;
The second, aircraft skin part pre-seted and builds ring property figure and holographic attribute face edge graph, pre-seting and mainly comprise: setting up Cutter coordinate system, selected reverse side identified surface and part model input; Define the seed face of all kinds of covering machining feature, search for the seed face of each category feature based on ring property figure and holographic attribute face edge graph;
3rd, process is optimized to the seed face with broken, then searches for based on reverse side identified surface, seed face and expansion rule, search out all geometric elements of each category feature, construct covering machining feature;
4th, extract all kinds of characteristic information, obtain feature recognition result.
2. method according to claim 1, it is characterized in that by analysis of aircraft skin part design feature and processing characteristics, the geometrical body with process similarity and geological information is defined as covering machining feature, and definition is herein sunk, is led to window, hole and contour feature; Undercut nature is the shallow slot on covering, mainly comprises end face, face, base angle and bottom surface, the bottom surface of undercut nature is defined as the seed face of undercut nature; Logical window feature is position covering needing adopt Milling Process milling saturating, shows as diameter in shape and is greater than the manhole of 20mm or irregular hole, mainly comprise wall, end face and bottom surface, the bottom surface of logical window feature is defined as the seed face of logical window feature; Hole characteristic covering needs adopt drilling to process the position drilled through, and shows as the manhole that diameter is less than or equal to 20mm in shape, mainly comprise wall, end face and bottom surface, the bottom surface of hole characteristic is defined as the seed face of hole characteristic; Contour feature is the theoretical profile border of skin part, is used as the guide line of trimming programming, mainly comprises contoured surface, reverse side identified surface is defined as the seed face of profile.
3. method according to claim 1, is characterized in that the basis for selecting of described reverse side identified surface is: definition to be processed of skin part is front, and the face of vis-a-vis is reverse side, and any one face in covering reverse side chosen is as reverse side identified surface.
4. method according to claim 1, it is characterized in that the described seed face searching for each category feature based on ring property figure and holographic attribute face edge graph refers to based on ring property figure and holographic attribute face edge graph, analyze ring property and the topological connection relation in face simultaneously, expand out meet all kinds of feature seed face ring property and topological connection relation feature face as the seed face of each category feature; Ring property figure refers to the ring property had by analysis face, constructs ring property figure, and ring property mainly refers to or without inner ring, has several inner ring, each inner ring has how many inner ring limit characteristics respectively.
5. method according to claim 1, it is characterized in that described first whether being connected according to curved surface when process is optimized to the seed face with broken, whether curvature search out the curved surface met the demands continuously, broken is considered as by there being the curved surface meeting this annexation, be optimized process, and form complete feature to replace original broken region feature, ensure the accuracy of undercut nature identification.
6. method according to claim 2, first all fronts are found according to reverse side identified surface when it is characterized in that described undercut nature builds, expand rule traversal front according to seed face of sinking and obtain correct sagging seed face, seed face expansion of sinking is regular: the front of definition containing inner ring is intermediate surface, only will contain the front of outer annular edge and expand as bottom surface of sinking with disjunct of intermediate surface, correct face, base angle is found in seed face according to sinking, and correct sagging end face is found in the sagging face, base angle of recycling; The required undercut nature information spinner extracted will comprise: the numbering of sinking, thickness, bottom surface, face, base angle and end face.
7. method according to claim 2, first finds all reverse side according to reverse side identified surface when it is characterized in that described logical window and hole characteristic build, and obtains curved surface with inner ring limit as the seed face of logical window feature and hole characteristic by traversal reverse side; Wherein, inner ring limit quantity is greater than the reverse side of 2 or inner ring limit quantity equals 2 and the reverse side that diameter is greater than 20mm is expanded as logical window seed face; Inner ring limit quantity is equaled 2 and the reverse side that diameter is less than or equal to 20mm is expanded as seed face, hole; Find correct wall according to seed face again, then find correct end face according to wall; The required logical window characteristic information extracted mainly comprises: the numbering of logical window, the logical window degree of depth, bottom surface, wall and end face; The required hole characteristic information spinner extracted will comprise: axial, the accuracy class in the numbering in hole, bottom surface, wall, end face, bore dia, hole depth, hole site, hole and tolerance.
8. method according to claim 2, first all reverse side are found according to profile seed face when it is characterized in that described contour feature builds, all faces that search is adjacent with reverse side again, obtain all sides, again from the side in remove the wall of hole and logical window, namely obtain all contoured surfaces; The required contour feature information spinner extracted will comprise: profile numbering, contoured surface and accuracy class.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636421.3A CN104462656B (en) | 2014-11-12 | 2014-11-12 | Aircraft skin part feature recognition methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636421.3A CN104462656B (en) | 2014-11-12 | 2014-11-12 | Aircraft skin part feature recognition methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104462656A true CN104462656A (en) | 2015-03-25 |
| CN104462656B CN104462656B (en) | 2017-04-05 |
Family
ID=52908687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410636421.3A Active CN104462656B (en) | 2014-11-12 | 2014-11-12 | Aircraft skin part feature recognition methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104462656B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652034A (en) * | 2016-09-23 | 2017-05-10 | 江西洪都航空工业集团有限责任公司 | Modeling method for rapid generation of pilot holes in skin part |
| CN109145753A (en) * | 2018-07-23 | 2019-01-04 | 珠海格力电器股份有限公司 | The recognition methods of indicator and device |
| WO2020061939A1 (en) * | 2018-09-27 | 2020-04-02 | 西门子股份公司 | Method, apparatus, and system for identifying device, storage medium, processor, and terminal |
| CN112580150A (en) * | 2020-12-24 | 2021-03-30 | 中航贵州飞机有限责任公司 | Modification fitting method of aircraft part process model |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289537A (en) * | 2011-06-20 | 2011-12-21 | 南京航空航天大学 | Method for identifying characteristics of complex structure in multi-body mode |
| CN103927426A (en) * | 2014-05-06 | 2014-07-16 | 南京航空航天大学 | Aero-engine blisk feature recognition method |
| CN103926879A (en) * | 2014-05-06 | 2014-07-16 | 南京航空航天大学 | Aviation engine crankcase feature recognition method |
-
2014
- 2014-11-12 CN CN201410636421.3A patent/CN104462656B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289537A (en) * | 2011-06-20 | 2011-12-21 | 南京航空航天大学 | Method for identifying characteristics of complex structure in multi-body mode |
| CN103927426A (en) * | 2014-05-06 | 2014-07-16 | 南京航空航天大学 | Aero-engine blisk feature recognition method |
| CN103926879A (en) * | 2014-05-06 | 2014-07-16 | 南京航空航天大学 | Aviation engine crankcase feature recognition method |
Non-Patent Citations (3)
| Title |
|---|
| CHARLIE C.L. WANG_ET AL: "Multi-dimensional dynamic programming in ruled surface fitting", 《COMPUTER-AIDED DESIGN》 * |
| 施建飞等: "基于属性边点图的飞机结构件筋特征识别方法", 《计算机集成制造系统》 * |
| 鲁泳等: "基于再扩展属性面边图的复杂结构件特征识别技术", 《机械设计与制造》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652034A (en) * | 2016-09-23 | 2017-05-10 | 江西洪都航空工业集团有限责任公司 | Modeling method for rapid generation of pilot holes in skin part |
| CN106652034B (en) * | 2016-09-23 | 2020-04-28 | 江西洪都航空工业集团有限责任公司 | Modeling method for quickly generating guide hole on skin part |
| CN109145753A (en) * | 2018-07-23 | 2019-01-04 | 珠海格力电器股份有限公司 | The recognition methods of indicator and device |
| CN109145753B (en) * | 2018-07-23 | 2020-10-02 | 珠海格力电器股份有限公司 | Watch hand identification method and device |
| WO2020061939A1 (en) * | 2018-09-27 | 2020-04-02 | 西门子股份公司 | Method, apparatus, and system for identifying device, storage medium, processor, and terminal |
| US10643111B2 (en) | 2018-09-27 | 2020-05-05 | Siemens Aktiengesellschaft | Method, system, and computer program product for identifying device |
| CN112580150A (en) * | 2020-12-24 | 2021-03-30 | 中航贵州飞机有限责任公司 | Modification fitting method of aircraft part process model |
| CN112580150B (en) * | 2020-12-24 | 2024-02-27 | 中航贵州飞机有限责任公司 | Modification fitting method of aircraft part process model |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104462656B (en) | 2017-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104375464B (en) | Aircraft skin milling efficient machining path automatic generating method | |
| CN101763069B (en) | Identification method of machining characteristics of complex parts of airplane | |
| CN102289537B (en) | Method for identifying characteristics of complex structure in multi-body mode | |
| CN102799144B (en) | Numerical control processing program transplanting method based on characteristics | |
| CN103336485B (en) | Rapid generating method of milling path of web of airplane structural member | |
| CN104462656B (en) | Aircraft skin part feature recognition methods | |
| CN103164582B (en) | Three-dimensional CAD model intersects manufacturing feature recognition methods | |
| CN102298795A (en) | Three-dimensional segmenting method for STL (Standard Template Library) triangular network model | |
| CN104360634A (en) | Skin mirror image milling numerical control program fast generating method based on features | |
| CN106934357B (en) | Automatic parallel fault identification method | |
| CN105893715A (en) | Process information intelligent matching method based on machining characteristics | |
| WO2022179097A1 (en) | Method and system for automatically constructing editable model of isogeometric topology optimization result | |
| CN104570948A (en) | Hole feature machining method for spaceflight sheet part | |
| CN103926879B (en) | Aero-engine casing characteristic recognition method | |
| CN105550387A (en) | Method and system for constructing process model on the basis of parameterization | |
| CN108804780B (en) | Method for three-dimensionally analyzing pile foundation bearing layer | |
| CN104267669B (en) | The casing cannelure milling roughing track automatic generation method of feature based | |
| CN104199383B (en) | Aviation engine case part milling blank automatic generation method | |
| CN104331020A (en) | Feature-based skin mirror-image milling technology decision method | |
| CN103927426B (en) | Aero-engine blisk characteristic recognition method | |
| CN105549537B (en) | Assembly parametrization and automatic numerical control processing method based on material object scanning | |
| CN104808588A (en) | Broken surface automatic combination and fitting method based on features | |
| CN116798028A (en) | Automatic dimension marking method for three-dimensional part | |
| CN102930108A (en) | Plane structural part rib characteristic identification method | |
| CN107194966B (en) | Identification method for geological boundary and attribute information of two-dimensional geological section map |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |