CN102902851A - Unfolding modeling method for airplane integral panels based on computer-graphics aided three-dimensional interactive application (CATIA) - Google Patents
Unfolding modeling method for airplane integral panels based on computer-graphics aided three-dimensional interactive application (CATIA) Download PDFInfo
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- CN102902851A CN102902851A CN2012103531677A CN201210353167A CN102902851A CN 102902851 A CN102902851 A CN 102902851A CN 2012103531677 A CN2012103531677 A CN 2012103531677A CN 201210353167 A CN201210353167 A CN 201210353167A CN 102902851 A CN102902851 A CN 102902851A
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Abstract
The invention provides an unfolding modeling method for airplane integral panels based on CATIA on the basis of airplane prototypes. The method is designed at thickness varying integral panels, and crooked integral panels can be unfolded accurately to form slab process models molding parts by means of theoretical shape curve surface optimization, model programming, constructing and unfolding and the like. The method overcomes the defect that unfolded models are unusable caused by overlarge unfolding errors due to theoretical shape curve surfaces.
Description
Technical field
The invention belongs to airplane digital manufacturing field, relate to a kind of expansion modeling method of overall aircraft wallboard, particularly a kind of expansion modeling method of Varying-thickness integral panel.
Background technology
Modern large aircraft wing generally adopts integral panel to replace traditional riveted joint wallboard as main force support structure.That the integral panel that is combined together in wallboard body and long purlin has is lightweight, good rigidly, advantage that impermeability is good, can satisfy the technical requirements such as present generation aircraft lightweight, long-life and high reliability.The outside surface of integral panel is the aerodynamic configuration face of aircraft, so its manufacturing accuracy directly affects the aeroperformance of aircraft.Integral panel at present the most frequently used job operation is first the wallboard digital-to-analogue to be carried out unfolding calculation in three-dimensional ENGINEERING CAD software, set up the dull and stereotyped technique digital-to-analogue of wallboard, then process the expansion digital-to-analogue with Technique of Three Axis CNC Machines, adopt at last shot-blast process that it is shaped to net shape.Compare with the method that traditional direct employing five-coordinate numerally controlled machine tool is processed, this method working (machining) efficiency is high, saves material, and surface quality of workpieces is good.
The wallboard expansion is the net shape from wall panel parts, and the reverse process of asking for the dull and stereotyped process modeling of this part of moulding is a gordian technique in the integral panel shot-peening processing technology.Integral panel launches modeling method for shortening the aircraft development cycle fast and accurately, guarantees aircraft aerodynamic performance and promotes that the development of present generation aircraft manufacturing technology is significant.Document " Zhang Xianjie; Pei Guangyong; Wang Junbiao; launch based on the overall aircraft wallboard class Components Digital of UG; aero-manufacturing technology 2(2003) 57-60 " discloses a kind of method of deploying of the overall aircraft wallboard based on UG, and may further comprise the steps: (1) sets up the geometric model of integral panel part; (2) the wallboard external surface being carried out grid divides; (3) the wallboard model is launched modeling, comprise the expansion of architectural feature on the expansion of external surface and the interior shape face; (4) postposition of expansion model is processed.The defective of the method shows as:
1, owing to the wallboard external surface is not carried out ductile detection and optimization process before launching, the method causes easily launches the overproof situation of result, causes expansion model to be scrapped.
2, the method does not relate to the building method of the interior shape developed surface of Varying-thickness wallboard body.If adopt by hand and get an expansion, working strength is large, make mistakes easily, and the some bit density is low, launches of poor quality.
Summary of the invention:
In order to overcome above-mentioned existing methodical deficiency, the present invention is take the airplane digital model machine as the basis, a kind of expansion modeling method of the overall aircraft wallboard based on CATIA software is provided, the method is for the integral panel of Varying-thickness, by means such as optimum theory appearance curved surface and programming constructs expansion model, can comparatively exactly the integral panel of bending be expanded into the dull and stereotyped process modeling of this part of moulding.
The technical solution adopted for the present invention to solve the technical problems is: a kind of expansion modeling method of the overall aircraft wallboard based on CATIA is characterized in that may further comprise the steps:
1), etection theory appearance curved surface: go beyond the scope with diagonal line as detection line at theoretical appearance curved surface, the Expansion Theory appearance curved surface obtains the profile developed surface, detection line is delivered to obtains launching detection line on the profile developed surface, contrast the length that all detection lines launch front and back, the expansion error of decision theory appearance curved surface successively, if this error directly carry out step 2 in allowed band); Otherwise, by the mode of structure multi-section curved surface this curved surface is optimized processing, until the expansion error of theoretical appearance curved surface satisfies technological requirement, then replace former theoretical appearance curved surface with the curved surface after optimizing;
2), with the resemblance line of integral panel, and the long purlin datum line relevant with this integral panel and rib datum line project on the theoretical appearance curved surface;
3), the Expansion Theory appearance curved surface obtains the profile developed surface, and will project to the resemblance line of theoretical appearance curved surface, long purlin datum line and rib datum line and be delivered on the profile developed surface;
4), the interior shape developed surface of structure wallboard body: by the second development interface of CATIA, programming is taked the some position on the shape face in the wallboard body with the density of appointment, measures the thickness of place, each point position wallboard body; Then these some position information and one-tenth-value thickness 1/10 are delivered on the profile developed surface, obtain the some cloud corresponding to interior shape developed surface; With reference to the wallboard body, this cloud of match generates interior shape developed surface at last;
5), set up the expansion model of wallboard body: according to profile developed surface, interior shape developed surface and project to resemblance line on the profile developed surface, set up its expansion model with reference to the wallboard body;
6), set up the expansion model of long purlin: extract the long purlin cross section sketch of each long purlin datum line and rib datum line intersection point place on the profile developed surface and be delivered on the profile developed surface; Then growing cross section, purlin sketch as the cross section, the long purlin datum line on the profile developed surface and skew line thereof generate the expansion solid model of long purlin as guide line by the multi-section physical operation; Launch the features such as solid model interpolation position, hole and boss at last, obtaining the expansion model of long purlin;
7), merge the expansion model of wallboard body and the expansion model of long purlin, obtain the expansion model of integral panel.
Through above step, realized the foundation of the dull and stereotyped process modeling of overall aircraft wallboard.
The invention has the beneficial effects as follows: by launching before to the detection of the theoretical appearance curved surface expansion of wallboard error and to launching the optimization process of the overproof theoretical appearance curved surface of result, improved accuracy and the reliability of launching modeling, avoided because the excessive expansion model that causes of expansion error of theoretical appearance curved surface is unavailable; Adopt the program means structure launch in the some cloud of shape face, improved structure efficient and the quality of shape developed surface in the wallboard, avoided in the past manual building method working strength greatly and the shortcoming of makeing mistakes easily; Adopt the method for extracting cross section, long purlin sketch, the present invention has realized the quick and precisely structure of long purlin expansion model.
Description of drawings
Fig. 1 is the digital model of integral panel in the embodiment of the invention.
Fig. 2 is that embodiment of the invention step (1-1) detects error process figure.
Fig. 3 is that embodiment of the invention step (1-2) is optimized curved surface process figure.
Fig. 4 is that embodiment of the invention step 2 is obtained as a result figure of characteristic curve.
Fig. 5 is that the theoretical appearance curved surface of embodiment of the invention step 3 launches as a result figure.
Fig. 6 is that embodiment of the invention step 4 generates some cloud program flow diagram.
Fig. 7 is shape developed surface procedure chart in embodiment of the invention step 4 structure.
Fig. 8 is that embodiment of the invention step 5 wallboard body launches as a result figure.
Fig. 9 is that embodiment of the invention step 6 is set up long purlin expansion model procedure chart.
Figure 10 is that embodiment of the invention integral panel launches as a result figure.
Number description: 1-wallboard body, the long purlin of 2-, the theoretical appearance curved surface of 3-, the long purlin of 4-datum line, 5-rib datum line, 6-detection line, 7-profile developed surface, 8-launch expansion model, the expansion model of the long purlin of 16-, cross section, the long purlin of 17-sketch, 18-skew line, position, 19-hole, 20-boss, the 21-hypotenuse of shape developed surface, 15-wallboard body in detection line, 9-SPL, 10-sideline, 11-resemblance line, 12-profile developed surface, 13-point cloud, the 14-.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Implementation to as if as shown in Figure 1 certain model aircraft wing on an integrated wallboard body 1 and the integral panel of long purlin 2, wherein wallboard body 1 is Varying-thickness.This integral panel theoretical appearance curved surface 3 that corresponding hyperbolicity can not be opened up and the information such as long purlin datum line 4 and rib datum line 5 are provided in the digital prototype.Only provided the part of integral panel in the accompanying drawing.It is as follows in CATIA software this integral panel to be launched the process of modeling:
1), detection and optimum theory appearance curved surface 3, detailed process is as follows:
Etection theory appearance curved surface 3: as shown in Figure 2, go beyond the scope with diagonal line as detection line 6 at theoretical appearance curved surface 3, Expansion Theory appearance curved surface 3 obtains profile developed surface 7, detection line 6 is delivered to obtains launching detection line 8 on the profile developed surface 7, contrast the length of all detection lines before and after launching.Comparing result shows that a detection line that launches the error maximum launches front long 4125.89mm, long 4127.17mm after launching, error 1.28mm, exceed error allowed band 0.8mm, illustrate that theoretical appearance curved surface 3 surface quality do not reach the expansion requirement, therefore need to be optimized processing to it.
Optimum theory appearance curved surface 3: as shown in Figure 3, on theoretical appearance curved surface 3, make one group of parallel curves along long purlin datum line 4 directions, on every curve, make equably several points, re-construct the continuous SPL 9 of a suite rate with these points; Then on the theoretical appearance curved surface 3 along two sidelines 10 of rib direction as guide line, the curved surface that makes new advances by multi-section curved surface operation match with SPL 9; Adopt at last the expansion error of the method detection fitting surface of step (1-1), learn that maximum error is 0.107mm, in the error allowed band, therefore replace theoretical appearance curved surface 3 with this fitting surface.
2), extract the resemblance line 11 of integral panel, then resemblance line 11, long purlin datum line 4 and rib datum line 5 are projected on the theoretical appearance curved surface 3, as shown in Figure 4.
3), Expansion Theory appearance curved surface 3 obtains profile developed surface 12, and will project to the resemblance line 11 of theoretical appearance curved surface 3, long purlin datum line 4 and rib datum line 5 and be delivered on the profile developed surface 12, as shown in Figure 5.
4), the interior shape developed surface 14 of structure wallboard body 1: by the second development interface of CATIA, write the VB program with the some position on the interior shape face of the Density extraction wallboard body 1 of appointment, measure the thickness of place, each point position wallboard body; Then these some position information and one-tenth-value thickness 1/10 are delivered on the profile developed surface 12, form the some cloud 13 corresponding to interior shape developed surface 14, program circuit as shown in Figure 6; With reference to wallboard body 1, this cloud of match 13 generates interior shape developed surface 14, as shown in Figure 7 at last.
5), set up the expansion model 15 of wallboard body 1: according to resemblance line 11, profile developed surface 12 and interior shape developed surface 14, set up its expansion model 15 with reference to wallboard body 1, the result as shown in Figure 8.
6), set up the expansion model 16 of long purlin 2: extract cross section, the long purlin sketch 17 of each long purlin datum line 4 and rib datum line 5 intersection point places on the profile developed surface and be delivered on the profile developed surface 12; Then growing cross section, purlin sketch 17 as the cross section, on the profile developed surface long purlin datum line 4 and skew line 18 as guide line, generate the expansion solid model of long purlin by the multi-section physical operation; Launch solid model interpolation position, hole 19, boss 20 and hypotenuse 21 at last, obtaining the expansion model 16 of long purlin, as shown in Figure 9.
7), merge the expansion model 15 of wallboard body 1 and the expansion model 16 of long purlin 2, obtain the expansion model of integral panel, as shown in figure 10.
Through above step, realized the foundation of the dull and stereotyped process modeling of this piece integral panel.
Check to expansion model shows, is 0.0058% along the maximum error of long purlin datum line direction, is 0.0079% along the maximum error of rib datum line direction, all in allowed band.
Claims (2)
1. expansion modeling method based on the overall aircraft wallboard of CATIA is characterized in that may further comprise the steps:
1), etection theory appearance curved surface: go beyond the scope with diagonal line as detection line at theoretical appearance curved surface, the Expansion Theory appearance curved surface obtains the profile developed surface, detection line is delivered to obtains launching detection line on the profile developed surface, contrast the length that all detection lines launch front and back, the expansion error of decision theory appearance curved surface successively, if this error directly carry out step 2 in allowed band); Otherwise, by the mode of structure multi-section curved surface this curved surface is optimized processing, until the expansion error of theoretical appearance curved surface satisfies technological requirement, then replace former theoretical appearance curved surface with the curved surface after optimizing;
2), with the resemblance line of integral panel, and the long purlin datum line relevant with this integral panel and rib datum line project on the theoretical appearance curved surface;
3), the Expansion Theory appearance curved surface obtains the profile developed surface, and will project to the resemblance line of theoretical appearance curved surface, long purlin datum line and rib datum line and be delivered on the profile developed surface;
4), the interior shape developed surface of structure wallboard body: by the second development interface of CATIA, programming is taked the some position on the shape face in the wallboard body with the density of appointment, measures the thickness of place, each point position wallboard body; Then these some position information and one-tenth-value thickness 1/10 are delivered on the profile developed surface, obtain the some cloud corresponding to interior shape developed surface; With reference to the wallboard body, this cloud of match generates interior shape developed surface at last;
5), set up the expansion model of wallboard body: according to profile developed surface, interior shape developed surface and project to resemblance line on the profile developed surface, set up its expansion model with reference to the wallboard body;
6), set up the expansion model of long purlin: extract the long purlin cross section sketch of each long purlin datum line and rib datum line intersection point place on the profile developed surface and be delivered on the profile developed surface; Then growing cross section, purlin sketch as the cross section, the long purlin datum line on the profile developed surface and skew line thereof generate the expansion solid model of long purlin as guide line by the multi-section physical operation; Launch the features such as solid model interpolation position, hole and boss at last, obtaining the expansion model of long purlin;
7), merge the expansion model of wallboard body and the expansion model of long purlin, obtain the expansion model of integral panel.
2. the expansion modeling method of the overall aircraft wallboard based on CATIA as claimed in claim 1, it is characterized in that when step 1) etection theory appearance curved surface, the expansion error of theoretical appearance curved surface exceeds allowed band, theoretical appearance curved surface is optimized, on theoretical appearance curved surface, to make one group of parallel curves along long purlin datum line direction, on every curve, make equably several points, re-construct the continuous SPL of a suite rate with these points; Then on the theoretical appearance curved surface along two sidelines of rib direction as guide line, the curved surface that makes new advances by multi-section curved surface operation match with SPL; Adopt at last the expansion error of the method detection fitting surface of step 1), in the error allowed band, replace theoretical appearance curved surface with this fitting surface.
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Cited By (13)
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| CN103900520A (en) * | 2014-03-28 | 2014-07-02 | 西北工业大学 | Method for detecting geometric dimension of integral wall panel slab model |
| CN104778742A (en) * | 2014-01-15 | 2015-07-15 | 中冶建筑研究总院有限公司 | Method for establishing 3D digital maintenance platform of aircraft based on 3D laser scanning technology |
| CN104972282A (en) * | 2015-07-15 | 2015-10-14 | 江西洪都航空工业集团有限责任公司 | Method for machining aircraft skin part |
| CN106709184A (en) * | 2016-12-26 | 2017-05-24 | 中国航空工业集团公司西安飞机设计研究所 | Generation method of inner model curve face of wing wall panel |
| CN107377680A (en) * | 2017-06-23 | 2017-11-24 | 成都飞机工业（集团）有限责任公司 | A kind of straightening method of roll bending wallboard |
| CN105303520B (en) * | 2015-11-24 | 2018-06-15 | 中船黄埔文冲船舶有限公司 | A kind of method that printed words are unfolded |
| CN109063272A (en) * | 2018-07-12 | 2018-12-21 | 江西洪都商用飞机股份有限公司 | A kind of design method of flexibility bore template |
| CN111339608A (en) * | 2018-12-03 | 2020-06-26 | 中国商用飞机有限责任公司 | Method and device for obtaining a protoplate by unfolding a curved plate section |
| CN112560190A (en) * | 2020-12-28 | 2021-03-26 | 中国航空工业集团公司沈阳飞机设计研究所 | Dimension reduction design method for special-shaped curved surface functional structure |
| 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 |
| CN112699456A (en) * | 2020-12-11 | 2021-04-23 | 成都飞机工业（集团）有限责任公司 | Model optimization method for realizing physical unfolding plane characteristic of wing surface wall plate |
| CN113673043A (en) * | 2020-05-13 | 2021-11-19 | 上海飞机制造有限公司 | Unfolding method of variable-thickness skin based on unfolding layer |
| CN114227152A (en) * | 2021-11-25 | 2022-03-25 | 杰瑞石油天然气工程有限公司 | Tubular member and method of machining the same |
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Cited By (19)
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| CN104778742A (en) * | 2014-01-15 | 2015-07-15 | 中冶建筑研究总院有限公司 | Method for establishing 3D digital maintenance platform of aircraft based on 3D laser scanning technology |
| CN103900520B (en) * | 2014-03-28 | 2016-07-06 | 西北工业大学 | A kind of integral panel slab model geometric size detecting method |
| CN103900520A (en) * | 2014-03-28 | 2014-07-02 | 西北工业大学 | Method for detecting geometric dimension of integral wall panel slab model |
| CN104972282A (en) * | 2015-07-15 | 2015-10-14 | 江西洪都航空工业集团有限责任公司 | Method for machining aircraft skin part |
| CN105303520B (en) * | 2015-11-24 | 2018-06-15 | 中船黄埔文冲船舶有限公司 | A kind of method that printed words are unfolded |
| CN106709184B (en) * | 2016-12-26 | 2020-01-14 | 中国航空工业集团公司西安飞机设计研究所 | Method for generating inner curved surface of wing panel |
| CN106709184A (en) * | 2016-12-26 | 2017-05-24 | 中国航空工业集团公司西安飞机设计研究所 | Generation method of inner model curve face of wing wall panel |
| CN107377680A (en) * | 2017-06-23 | 2017-11-24 | 成都飞机工业（集团）有限责任公司 | A kind of straightening method of roll bending wallboard |
| CN109063272B (en) * | 2018-07-12 | 2023-05-09 | 江西洪都商用飞机股份有限公司 | Design method of flexible drilling template |
| CN109063272A (en) * | 2018-07-12 | 2018-12-21 | 江西洪都商用飞机股份有限公司 | A kind of design method of flexibility bore template |
| CN111339608A (en) * | 2018-12-03 | 2020-06-26 | 中国商用飞机有限责任公司 | Method and device for obtaining a protoplate by unfolding a curved plate section |
| CN111339608B (en) * | 2018-12-03 | 2023-05-12 | 中国商用飞机有限责任公司 | Method and device for obtaining a master plate by spreading out a curved plate section |
| CN113673043A (en) * | 2020-05-13 | 2021-11-19 | 上海飞机制造有限公司 | Unfolding method of variable-thickness skin based on unfolding layer |
| CN113673043B (en) * | 2020-05-13 | 2024-03-01 | 上海飞机制造有限公司 | Unfolding method of variable-thickness skin based on unfolding layer |
| CN112699456A (en) * | 2020-12-11 | 2021-04-23 | 成都飞机工业（集团）有限责任公司 | Model optimization method for realizing physical unfolding plane characteristic of wing surface wall plate |
| 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 |
| CN112560190A (en) * | 2020-12-28 | 2021-03-26 | 中国航空工业集团公司沈阳飞机设计研究所 | Dimension reduction design method for special-shaped curved surface functional structure |
| CN114227152A (en) * | 2021-11-25 | 2022-03-25 | 杰瑞石油天然气工程有限公司 | Tubular member and method of machining the same |
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