A method for constructing an aircraft tooling measurement field

Abstract

The application belongs to the technical field of measurement field construction, and particularly relates to a kind of airplane tooling measurement field construction methods, first, three points are used to construct original coordinate triangle, then the center point, the fourth corner point are obtained by outward expansion of triangle point connecting line, and the vertical point is obtained by vertical upward expansion, and the bisecting point is obtained by equal division of the connecting line of the four corner points, as a reference point, and then a global coordinate system is constructed, a precise airplane tooling measurement field is constructed by obtaining a space line network through stable reference and relatively simple straight line distance measurement.

Description

Technical Field

[0001] This application belongs to the field of measurement field construction technology, specifically relating to a method for constructing an aircraft tooling measurement field. Background Technology

[0002] Aircraft tooling is a crucial foundation for ensuring aircraft manufacturing quality, and its accuracy typically needs to be 1 / 3 to 1 / 5 of the aircraft manufacturing precision. The aircraft tooling measurement field serves as the basis for tooling positioning component installation and measurement during the aircraft manufacturing process; ensuring its accuracy is extremely important.

[0003] As the quality requirements for aircraft manufacturing, especially the requirements for symmetry, become increasingly stringent, and the size of aircraft components also increases, the tooling measurement field also becomes larger and larger. Sometimes the maximum size of the tooling measurement field can reach 80m, while the accuracy requirements of the tooling measurement field remain unchanged, and in most cases need to be kept within 0.2mm.

[0004] Currently, the measurement accuracy of laser trackers is 15μm+6ppm. For the manufacturing of 30m aircraft, the ranging accuracy is 0.2mm. However, considering the combined superposition errors of system establishment, transfer station, complex system, and ranging, it is difficult to achieve the accuracy requirement of 0.2mm when manufacturing aircraft larger than 30m. Therefore, this application is hereby submitted. Summary of the Invention

[0005] The purpose of this application is to provide a method for constructing an aircraft tooling measurement field, which is used to construct a high-precision aircraft tooling measurement field as the basis for tooling positioning component installation and aircraft manufacturing process measurement, thereby ensuring the manufacturing accuracy of the aircraft.

[0006] The technical solution of this application is:

[0007] A method for constructing an aircraft tooling measurement field includes:

[0008] Step 1: Construct a quadrilateral planar foundation for the measurement area;

[0009] Step 2: Set up reference bases at the three vertices of the quadrilateral planar foundation. Place a reflecting sphere on each reference base, and record the centers of the three reflecting spheres as the first reference points. Second benchmark Third benchmark Leveling is then performed;

[0010] Step 3: Set up a reference base at the fourth vertex of the quadrilateral planar foundation, and mark the center of the reflecting sphere on the reference base as the fourth reference point. ;

[0011] Step 4, in Connecting and The intersection of the lines, set the reference seat, the center of the reflecting ball on the reference seat is recorded as the center reference point ;

[0012] Step five, the center reference point is adjusted to the extension line of the line, and the fourth reference point is adjusted to the extension line of the line;

[0013] Step six, set the reference seat in the vertical direction of the quadrilateral plane foundation, and the center of the reflecting ball on the reference seat is recorded as the vertical reference point ;

[0014] Step seven, at the intersection of the lines the line the line, the line the line, the line, the line, the equidistant point position of the lines is set as the reference seat, and the center of the reflecting ball on the reference seat is adjusted to the corresponding equidistant point position and recorded as the equidistant reference point , wherein, the number of equidistant points is n;

[0015] Step eight, the direction of the line is X, the direction of the line is Y, the vertical reference point is Z, and a global coordinate system is established, and the position coordinates of the first reference point , the second reference point , the third reference point , the fourth reference point , the center reference point , and the vertical reference point in the global coordinate system are calculated and assigned as measurement reference points, and an aircraft tooling measurement field is constructed.

[0016] Optionally, in the aircraft tooling measurement field construction method described above, in step two, the first reference point , the second reference point , and the third reference point are leveled by using a level to realize leveling of the first reference point , the second reference point , and the third reference point .

[0017] Optionally, in the aircraft tooling measurement field construction method described above, in step five, the center reference point The corresponding reference surface, and the first reference point Third benchmark The corresponding reference base surface is leveled to achieve the center reference point. Adjust to Online;

[0018] Using a laser interferometer, the fourth reference point The corresponding reference surface, and the second reference point Central reference point The corresponding reference base surface is leveled to achieve the fourth reference point. Adjust to On the extension of the connecting line.

[0019] Optionally, in the above-mentioned method for constructing an aircraft tooling measurement field, in step six, the reference base vertically set on the quadrilateral planar foundation is supported by a fixed structure, and the vertical reference point... Set at the first reference point Second benchmark Third benchmark Fourth benchmark or center reference point Above;

[0020] Using the first reference point Second benchmark Third benchmark Fourth benchmark Central reference point Vertical reference point The lines between them are used to draw a spatial line grid. If more than three lines are introduced into a point in the spatial line grid, the point is matched to its best position using the least squares method according to the introduced lines.

[0021] For the first reference point Second benchmark Third benchmark Fourth benchmark Central reference point Vertical reference point The length of the line connecting the two points is measured using a laser interferometer.

[0022] Optionally, in the above-mentioned method for constructing an aircraft tooling measurement field, in step seven, a laser interferometer is used to measure... Connection Connection Connection Connection Connection The length of the connecting line is then determined. Connection Connection Connection Connection Connection The positions of the points that divide the line equally.

[0023] Optionally, in the above-mentioned method for constructing an aircraft tooling measurement field, when measuring the length of the line connecting two reference points, a steel cable parallel to the line connecting the two reference points is set up to pull the optical target of the laser interferometer. A detachable reference receiver is set on the reflective sphere corresponding to one of the reference points, and a transfer positioning plate is connected to the reference receiver. The transfer positioning plate is perpendicularly pressed against the steel cable, thereby measuring the length of the line connecting the two reference points.

[0024] Optionally, in the above-mentioned method for constructing an aircraft tooling measurement field, when measuring the length of the line connecting two reference points, a two-wire or four-wire steel cable is used, with both ends fixed by a traction structure, and an adjustable support structure is set between the two traction structures to adjust the straightness of the steel cable. The straightness of the steel cable is observed using a laser collimator.

[0025] Optionally, in the above-mentioned method for constructing an aircraft tooling measurement field, when each reference pedestal is installed, a laser tracker is used to perform USMN network measurement and initial calibration.

[0026] This application has at least the following beneficial technical effects:

[0027] This paper provides a method for constructing an aircraft tooling measurement field. It adopts a geometric spatial linear network method and uses a laser interferometer for precise distance measurement to construct a global coordinate system. The constructed aircraft tooling measurement field has high accuracy and can be used for high-precision measurement of dimensions from 30m to 80m or even larger, which can effectively ensure the manufacturing accuracy of the aircraft. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the construction of an aircraft tooling measurement field provided in an embodiment of this application;

[0029] Figure 2 yes Figure 1 A partial schematic diagram;

[0030] Figure 3 This is a schematic diagram of the reference base and reflecting sphere provided in the embodiments of this application, set on a quadrilateral planar foundation;

[0031] in:

[0032] 1-Quadrilateral planar foundation; 2-Reference base; 3-Reflecting sphere; 4-Steel cable; 5-Reference receiver base; 6-Transfer positioning plate; 7-Traction structure; 8-Adjustable support structure.

[0033] To better illustrate this embodiment, some content in the accompanying drawings may be omitted, enlarged, or reduced. They are for illustrative purposes only and should not be construed as limiting the scope of this application. Detailed Implementation

[0034] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, and other related parts can be referred to the general design.

[0035] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The word "comprising" as used in this application description indicates that the concept preceding the word encompasses the concepts listed following the word and their equivalents, without excluding other related concepts.

[0036] Furthermore, the terms indicating location used in the description of this application are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0037] A method for constructing an aircraft tooling measurement field, such as Figure 1 As shown.

[0038] Step 1: Construct a quadrilateral planar foundation 1 for the measurement area.

[0039] The quadrilateral planar foundation 1 contains the measurement area, and the measurement area is subjected to temperature control treatment.

[0040] Step 2: Set up reference bases 2 at the three vertices of the quadrilateral planar foundation 1. Set up reflecting spheres 3 on the reference bases 2. Record the centers of the three reflecting spheres 3 as the first reference points. Second benchmark Third benchmark Then, level it.

[0041] First reference point Second benchmark Third benchmark They can be arranged counterclockwise.

[0042] Using a level, set the first reference point Second benchmark Third benchmark The corresponding reference base 2 surface is leveled to achieve the first reference point. Second benchmark Third benchmark The leveling was adjusted to make the first reference point Second benchmark Third benchmark On the same horizontal plane.

[0043] Step 3: Set up a reference base 2 at the fourth vertex of the quadrilateral planar foundation 1, and mark the center of the reflecting sphere 3 on the reference base 2 as the fourth reference point. .

[0044] Step 4, in Connecting and At the intersection of the lines, a reference base 2 is set up, and the center of the reflecting sphere 3 on the reference base 2 is recorded as the center reference point. .

[0045] Step 5: Set the center reference point Adjust to On the line, and the fourth benchmark point Adjust to On the extension of the connecting line.

[0046] Using a laser interferometer, the center reference point is... The corresponding surface of the reference base 2, and the first reference point Third benchmark The corresponding reference base 2 surface is leveled to achieve the center reference point. Adjust to On the connection line, at this moment, the first reference point Second benchmark Third benchmark Central reference point The corresponding reference base 2 surface is leveled so that it is on the same horizontal plane.

[0047] Using a laser interferometer, the fourth reference point The corresponding surface of the reference base 2, and the second reference point Central reference point The corresponding reference base 2 surface is leveled to achieve the fourth reference point. Adjust to On the extension of the connecting line, at this point, the first reference point... Second benchmark , third reference point , fourth reference point , center reference point The corresponding reference seat 2 surface leveling.

[0048] Step six, the reference seat 2 is set in the vertical direction of the quadrilateral plane foundation 1, and the center of the reflecting ball 3 on the reference seat 2 is recorded as the vertical reference point .

[0049] The reference seat 2 set in the vertical direction of the quadrilateral plane foundation 1 can be supported by a fixed structure, and the vertical reference point can be set above the first reference point , second reference point , third reference point , fourth reference point or center reference point .

[0050] The line between the first reference point , second reference point , third reference point , fourth reference point , center reference point , vertical reference point can be used to draw a spatial line grid. If a point in the spatial line grid introduces more than three lines, the point is matched to the best position according to the introduced lines by the least square method. The maximum deviation of the introduced lines from the point is the position degree deviation of the point.

[0051] The length of the line between the first reference point , second reference point , third reference point , fourth reference point , center reference point and vertical reference point can be measured by a laser interferometer.

[0052] Step seven, the reference seat 2 is set at the position of the bisector of the line line line, line line, line, line, and the center of the reflecting ball 3 on the multiple reference seats 2 is adjusted to the corresponding bisector position, recorded as the bisector reference point , wherein is the number of bisectors.

[0053] The length of the line between the bisector reference points is measured by a laser interferometer. The line connecting, The line connecting, The line connecting The line connecting, The line connecting, The length of the line connecting, and further determine The line connecting The line connecting, The line connecting The line connecting, The line connecting, The position of the line connecting bisecting point.

[0054] The line connecting, The position of the line connecting bisecting point setting, can avoid the center reference point , also the center reference point As one of the bisecting points.

[0055] Step eight, with The direction of the line connecting is X, The direction of the line connecting is Y, vertical reference point The vertical direction of the quadrilateral plane foundation 1 is Z, to establish the global coordinate system, the first reference point , the second reference point , the third reference point , the fourth reference point , the center reference point , the vertical reference point In the global coordinate system, the position coordinates are calculated and assigned, as the measurement reference point, and the aircraft tooling measurement field is constructed.

[0056] The first reference point , the second reference point , the third reference point , the fourth reference point , the center reference point , the vertical reference point , can be calculated and assigned according to its position in the global coordinate system and the space line network composed of the line connecting.

[0057] The global coordinate system can be offset according to X, Y, Z, to form a measurement coordinate system that meets the coordinate system change requirements of the measurement area and the measurement object.

[0058] In addition, when measuring the length of the line between two reference points, a steel cable 4 parallel to the line between the two reference points can be arranged to pull the optical target of the laser interferometer, and a detachable reference receiving seat 5 is arranged on the reflecting ball 3 corresponding to one of the reference points, and a switching positioning plate 6 is connected to the reference receiving seat 5, and the switching positioning plate 6 is vertically abutted on the steel cable 4, so as to measure the length of the line between the two reference points, as shown in Figure 2 .

[0059] The steel cable 4 can be a two-wire or four-wire steel cable, and the two ends are fixed by pulling structures 7, and an adjustable support structure 8 is arranged between the two pulling structures 7 for adjusting the straightness of the steel cable 4. The straightness of the steel cable 4 can be observed by using a laser collimator. The pulling structure 7 is a plate-shaped support structure, and the adjustable support structure 8 is a telescopic plate-shaped structure.

[0060] The reference seat 2 is cooperated with the reflecting ball 3 to be installed on the quadrilateral plane foundation 1, as shown in Figure 3 . When each reference seat 2 is installed, USMN networking measurement can be performed by using a laser tracker, initial adjustment and calibration, and adjustment allowance is reserved for subsequent adjustment.

[0061] The aircraft tooling measurement field construction method disclosed in the above embodiment uses the high-precision distance measurement function of the laser interferometer to arrange and calibrate large-size measurement reference points. First, a three-point original coordinate triangle is constructed, then the center point, the fourth corner point are obtained by expanding the line between the triangle points outward, and the vertical point is obtained by expanding vertically upward, and the line between the four corner points is equally divided to obtain the equally divided point as the reference point, and then the global coordinate system is constructed. The stable reference and the relatively simple straight-line distance measurement are used to obtain a spatial line network, and a precise aircraft tooling measurement field is constructed.

[0062] The aircraft tooling measurement field construction method disclosed in the above embodiment uses the geometric spatial straight-line network method and the precise distance measurement by the laser interferometer to construct the global coordinate system. The constructed aircraft tooling measurement field has high precision and can be used for high-precision measurement of 30m-80m or even larger size, which can effectively guarantee the manufacturing precision of the aircraft.

[0063] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings. It should be understood by those skilled in the art that the protection scope of the present application is obviously not limited to these specific embodiments. Without deviating from the principles of the present application, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical solutions after these changes or replacements will fall within the protection scope of the present application.

Claims

1. A method for constructing an aircraft tooling measurement field, characterized in that, include: Step 1: Construct a quadrilateral planar foundation for the measurement area (1); Step 2: Set up reference seats (2) at the three vertices of the quadrilateral planar foundation (1). Set up reflecting spheres (3) on the reference seats (2). Record the centers of the three reflecting spheres (3) as the first reference points. Second benchmark Third benchmark Leveling is then performed; Step 3: Set up a reference base (2) at the fourth vertex of the quadrilateral planar foundation (1), and mark the center of the reflecting sphere (3) on the reference base (2) as the fourth reference point. ; Step 4, in Connecting and At the intersection of the lines, a reference base (2) is set up, and the center of the reflecting sphere (3) on the reference base (2) is recorded as the center reference point. ; Step 5: Set the center reference point Adjust to On the line, and the fourth benchmark point Adjust to On the extension of the connecting line; Step 6: Set up a reference base (2) vertically on the quadrilateral planar foundation (1), and record the center of the reflecting sphere (3) on the reference base (2) as the vertical reference point. ; Step 7, in Connection Connection Connection Connection Connection Set up reference bases (2) at the points where the lines are evenly divided. Adjust the centers of the reflecting spheres (3) on the multiple reference bases (2) to the corresponding points where the lines are evenly divided, and record them as the evenly divided reference points. , ,in, The number of division points; Step 8, with The direction of the line is X-axis. The direction of the connecting line is Y-axis, perpendicular to the reference point. With the Z-direction perpendicular to the quadrilateral planar foundation (1), establish a global coordinate system and use the first reference point... Second benchmark Third benchmark Fourth benchmark Central reference point Vertical reference point The position coordinates in the global coordinate system are calculated and assigned as the measurement reference point to construct the aircraft tooling measurement field.

2. The method for constructing an aircraft tooling measurement field according to claim 1, characterized in that, In step two, the first reference point is established using a level. Second benchmark Third benchmark The corresponding reference base (2) surface is leveled to achieve the first reference point. Second benchmark Third benchmark The leveling.

3. The method for constructing an aircraft tooling measurement field according to claim 2, characterized in that, In step five, a laser interferometer is used to determine the center reference point. The corresponding reference base (2) surface, and the first reference point Third benchmark The corresponding reference base (2) surface is leveled to achieve the center reference point. Adjust to Online; Using a laser interferometer, the fourth reference point The corresponding reference base (2) surface, and the second reference point Central reference point The corresponding reference base (2) surface is leveled to achieve the fourth reference point. Adjust to On the extension of the connecting line.

4. The method for constructing an aircraft tooling measurement field according to claim 3, characterized in that, In step six, the reference base (2) is set vertically on the quadrilateral planar foundation (1) and supported by a fixed structure, with the vertical reference point... Set at the first reference point Second benchmark Third benchmark Fourth benchmark or center reference point Above; Using the first reference point Second benchmark Third benchmark Fourth benchmark Central reference point Vertical reference point The lines between them are used to draw a spatial line grid. If more than three lines are introduced into a point in the spatial line grid, the point is matched to its best position using the least squares method according to the introduced lines. For the first reference point Second benchmark Third benchmark Fourth benchmark Central reference point Vertical reference point The length of the line connecting the two points is measured using a laser interferometer.

5. The method for constructing an aircraft tooling measurement field according to claim 4, characterized in that, In step seven, a laser interferometer is used to measure... Connection Connection Connection Connection Connection The length of the connecting line is then determined. Connection Connection Connection Connection Connection The positions of the points that divide the line equally.

6. The method for constructing an aircraft tooling measurement field according to claim 5, characterized in that, When measuring the length of the line connecting two reference points, a steel cable (4) parallel to the line connecting the two reference points is set up to pull the optical target of the laser interferometer. A detachable reference receiver (5) is set on the reflective sphere (3) corresponding to one of the reference points. A transfer positioning plate (6) is connected to the reference receiver (5) so that the transfer positioning plate (6) is perpendicular to the steel cable (4) to measure the length of the line connecting the two reference points.

7. The method for constructing an aircraft tooling measurement field according to claim 6, characterized in that, When measuring the length of the line connecting two reference points, the steel cable (4) is a two- or four-wire steel cable, with both ends fixed by traction structures (7), and an adjustable support structure (8) is set between the two traction structures (7) to adjust the straightness of the steel cable (4). The straightness of the steel cable (4) is observed using a laser collimator.

8. The method for constructing an aircraft tooling measurement field according to claim 7, characterized in that, When installing each reference base (2), use a laser tracker to perform USMN network measurement, initial setup and calibration, and reserve adjustment margin.

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