CN105136094A - Curved surface auxiliary measuring device and curved surface coordinate system determining method for symmetrical double-curvature panels - Google Patents
Curved surface auxiliary measuring device and curved surface coordinate system determining method for symmetrical double-curvature panels Download PDFInfo
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- CN105136094A CN105136094A CN201510288841.1A CN201510288841A CN105136094A CN 105136094 A CN105136094 A CN 105136094A CN 201510288841 A CN201510288841 A CN 201510288841A CN 105136094 A CN105136094 A CN 105136094A
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Abstract
A curved surface auxiliary measuring device and a curved surface coordinate system determining method for symmetrical double-curvature panels relate to the field of aviation and aerospace manufacturing machinery. The device and the method are provided to solve the problem that the existing curved surface auxiliary measuring device and the coordinate system determining method are complex and need large amount of calculation. According to the technical scheme, the upper and lower end faces of a base are kept parallel to each other, two intersecting side walls on the base are respectively equipped with a first fixed seat, the remaining two side walls on the base are respectively equipped with a boss, each boss is provided with two internal threaded holes, and one end of each bolt is fixedly connected to a second fixed seat after passing through the corresponding internal threaded hole. The method comprises the following steps: step 1, putting and fixing a curved piece in the device; step 2, acquiring point cloud data; and step 3, establishing a coordinate system, and using Imageware software to process the point cloud data. The curved surface auxiliary measuring device and the curved surface coordinate system determining method of the invention are used in auxiliary measurement of the curved surface of a symmetric double-curvature panel.
Description
Technical field
The present invention relates to a kind of curved surface aided measurement device for symmetric double curved plate and surface coordinates system defining method, relate to Aero-Space manufacturing machine field.
Background technology
Hyperbolicity part is used for aerospace industry, as the covering, double-curved wallboard etc. of aircraft, also occupies certain proportion at civil area.The radius-of-curvature of hyperbolicity part changes along different directions, and therefore the geometric profile of its complexity adds measurement difficulty.Can there is resilience in sheet material, resilience is the key factor affecting sheet metal component forming accuracy upon bending.In order to determine quantifier elimination resilience, need to set up curved-surface piece symcenter, and it is constant to set this some holding position before and after resilience.Can coordinate system be set up according to this symcenter point, and evaluate the springback capacity of unloading rear curved surface part relative to unloading front curve part.
The foundation of curved-surface piece coordinate system needs the vertical relation obtaining true origin and three-dimensional, for the curved surface with obvious symmetrical feature, be only difficult to from the surface points cloud obtained the vertical relation establishing true origin and three-dimensional (as x-axis, y-axis and z-axis).The transform method of a kind of scanner coordinate system and engineering survey coordinate system is described in existing patent.But transform method is comparatively loaded down with trivial details, and calculated amount is large, and need the position relationship arranging target measuring wheel exterior feature to determine, test job is heavier simultaneously.
Summary of the invention
The object of this invention is to provide a kind of curved surface aided measurement device for symmetric double curved plate and surface coordinates system defining method, to solve current curved surface aided measurement device and to determine that coordinate system method is loaded down with trivial details, the problem that calculated amount is large.
The present invention solves the problems of the technologies described above the technical scheme taked to be:
Device scheme: described device comprises pedestal, two the first holders, two the second holders, two boss and four bolts, pedestal upper and lower end face keeping parallelism, the two side that pedestal intersects is equipped with the first holder respectively, remaining two sidewalls are respectively provided with boss to pedestal, each boss has two internal thread holes, and one end of each bolt is through affixed with the second holder after internal thread hole.
Method scheme: step one, curved-surface piece is placed on the horizontal end face of pedestal, make the horizontal segment sidewall close contact of the adjacent two side of curved-surface piece and the first holder, the horizontal segment sidewall of the second holder is contacted with the another adjacent wall of curved-surface piece, bolt is made to pass the internal thread hole of boss, and contacting the rear end face of the vertical section of two the second holders, swivel bolt makes the front end face of the vertical section of the second holder and curved-surface piece keep close contact;
Step 2, acquisition cloud data, utilize the curved surface of the scanning probe curved-surface piece of portable surveying instrument, scan the profile of the second holder vertical section front end face, the profile of the first holder vertical section front end face and the horizontal end face of pedestal simultaneously, obtain corresponding cloud data;
Step 3, form coordinate system, utilize Imageware software process cloud data, utilize the reference surface of software matching gain-of-function 5 end faces, software is utilized to intersect two intersections of the vertical section front end face of the first holder of gain-of-function base level end face and pedestal, two intersections of base level end face and the vertical section front end face of the second holder, according to transversal function, component quadrilateral also obtains the mid point on every bar limit, connect subtend mid point respectively and obtain two straight lines, article two, straight line is x-axis line in base level end face and y-axis line, cross the vertical line that these two straight-line intersections set up x-axis line and y-axis line, vertical line is z-axis line, the intersection point of z-axis and curved-surface piece point cloud is the symmetrical initial point of curved surface, along the z-axis direction x-axis and y-axis are moved to symmetrical initial point, then constitute the three-dimensional system of coordinate of curved-surface piece.
The present invention has following beneficial effect: 1, aided measurement device of the present invention, and physical dimension is little, operates simple and easy, can realize the multiple measurement with symmetric shape curved surface.2, the curved surface part available contact formula after utilizing aided measurement device fastening or non-contact measurement instrument obtain the some cloud of part curved surface profile and reference surface.3, by Imageware software, can process a cloud, according to the geometry vertical relation of reference surface, can the symmetrical initial point of quick obtaining curved surface and coordinate system.
Accompanying drawing explanation
Fig. 1 is the stereographic map of overall aided measurement device and curved-surface piece to be measured.
Embodiment
Embodiment one: composition graphs 1 illustrates present embodiment, the device of present embodiment comprises pedestal 1, two the first holders 2, two the second holders, 3, two boss 4 and four bolts 5, pedestal 1 upper and lower end face keeping parallelism, the two side that pedestal 1 intersects is equipped with the first holder 2 respectively, remaining two sidewalls are respectively provided with boss 4 to pedestal 1, each boss 4 has two internal thread hole 4-1, and one end of each bolt 5 is through affixed with the second holder 3 after internal thread hole 4-1.
Embodiment two: composition graphs 1 illustrates present embodiment, the shape of cross section of present embodiment first holder 2 and the second holder 3 is L shape, and this structure is convenient to manufacture.Other embodiment is identical with embodiment one.
Embodiment three: composition graphs 1 illustrates present embodiment, present embodiment two the first holders 2 are affixed and angle therebetween is 90 °, easy to operate when this structure uses.Other embodiment is identical with embodiment one.
Embodiment four: composition graphs 1 illustrates present embodiment, present embodiment comprises the steps: step one, is placed on the horizontal end face of pedestal 1 by curved-surface piece 6, make the horizontal segment sidewall close contact of the adjacent two side of curved-surface piece 6 and the first holder 2, the another adjacent wall of the horizontal segment sidewall of the second holder 3 and curved-surface piece 6 is contacted, make bolt 5 through the internal thread hole 4-1 of boss 4, and contacting the rear end face of the vertical section of two the second holders 3, swivel bolt 5 makes the front end face of the vertical section of the second holder 3 and curved-surface piece 6 keep close contact;
Step 2, acquisition cloud data, utilize the curved surface of the scanning probe curved-surface piece 6 of portable surveying instrument, scan the profile of the second holder 3 vertical sections of front end faces, the profile of the first holder 2 vertical sections of front end faces and the horizontal end face of pedestal 1 simultaneously, obtain corresponding cloud data;
Step 3, form coordinate system, utilize Imageware software process cloud data, utilize the reference surface of software matching gain-of-function 5 end faces, software is utilized to intersect two intersections of the first holder 2 vertical sections of front end faces of the horizontal end face of gain-of-function pedestal 1 and pedestal 1, two intersections of the horizontal end face of pedestal 1 and the second holder 3 vertical sections of front end faces, according to transversal function, component quadrilateral also obtains the mid point on every bar limit, connect subtend mid point respectively and obtain two straight lines, article two, straight line is x-axis line in the horizontal end face of pedestal 1 and y-axis line, cross the vertical line that these two straight-line intersections set up x-axis line and y-axis line, vertical line is z-axis line, the intersection point of z-axis and curved-surface piece point cloud is the symmetrical initial point of curved surface, along the z-axis direction x-axis and y-axis are moved to symmetrical initial point, then constitute the three-dimensional system of coordinate of curved-surface piece.
Claims (4)
1. the curved surface aided measurement device for symmetric double curved plate, it is characterized in that described device comprises pedestal (1), two the first holders (2), two the second holders (3), two boss (4) and four bolts (5), pedestal (1) upper and lower end face keeping parallelism, the first holder (2) is equipped with in upper two side of intersecting to pedestal (1) respectively, upper remaining two sidewalls of pedestal (1) are respectively provided with boss (4), each boss (4) has two internal thread holes (4-1), one end of each bolt (5) is affixed with the second holder (3) afterwards through internal thread hole (4-1).
2. a kind of curved surface aided measurement device for symmetric double curved plate according to claim 1, is characterized in that the shape of cross section of the first holder (2) and the second holder (3) is L shape.
3. a kind of curved surface aided measurement device for symmetric double curved plate according to claim 1 and 2, is characterized in that two the first holders (2) are affixed and the two front end face is formed angle is 90 °.
4. utilize the curved surface aided measurement device for symmetric double curved plate described in claim 1 to surface coordinates system defining method, it is characterized in that
Step one, curved-surface piece (6) is placed on the horizontal end face of pedestal (1), make the horizontal segment sidewall close contact of curved-surface piece (6) adjacent two side and the first holder (2), the another adjacent wall of the horizontal segment sidewall of the second holder (3) and curved-surface piece (6) is contacted, make bolt (5) through the internal thread hole (4-1) of boss (4), and contact the rear end face of the vertical section of two the second holders (3), swivel bolt (5) makes the front end face of the vertical section of the second holder (3) and curved-surface piece (6) keep close contact,
Step 2, acquisition cloud data, utilize the curved surface of the scanning probe curved-surface piece (6) of portable surveying instrument, scan the profile of the vertical section front end face of the second holder (3), the first holder (2) the vertically profile of section front end face and the horizontal end face of pedestal (1) simultaneously, obtain corresponding cloud data;
Step 3, form coordinate system, utilize Imageware software process cloud data, utilize the reference surface of software matching gain-of-function 5 end faces, software is utilized to intersect two intersections of the vertical section front end face of the first holder (2) of gain-of-function pedestal (1) horizontal end face and pedestal (1), two intersections of pedestal (1) horizontal end face and the vertical section front end face of the second holder (3), according to transversal function, component quadrilateral also obtains the mid point on every bar limit, connect subtend mid point respectively and obtain two straight lines, article two, straight line is x-axis line in pedestal (1) horizontal end face and y-axis line, cross the vertical line that these two straight-line intersections set up x-axis line and y-axis line, vertical line is z-axis line, the intersection point of z-axis and curved-surface piece point cloud is the symmetrical initial point of curved surface, along the z-axis direction x-axis and y-axis are moved to symmetrical initial point, then constitute the three-dimensional system of coordinate of curved-surface piece.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106767644A (en) * | 2017-02-22 | 2017-05-31 | 长春工业大学 | Rotationally symmetrical surface forming device |
| CN108562226A (en) * | 2017-12-27 | 2018-09-21 | 歌尔股份有限公司 | Establishment of coordinate system device and method |
| CN110415331A (en) * | 2019-06-14 | 2019-11-05 | 中国电建集团昆明勘测设计研究院有限公司 | Method for rapidly detecting, judging and repairing contour or hole based on point cloud data |
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| CN106767644A (en) * | 2017-02-22 | 2017-05-31 | 长春工业大学 | Rotationally symmetrical surface forming device |
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| CN110415331A (en) * | 2019-06-14 | 2019-11-05 | 中国电建集团昆明勘测设计研究院有限公司 | Method for rapidly detecting, judging and repairing contour or hole based on point cloud data |
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