A horizontal wing box assembly structure and its installation method

Abstract

This invention discloses a horizontal wing box assembly structure and its installation method. The structure includes multiple columns, crossbeams, expansion plates, and corner plates. The columns are fixed to the ground in two rows, and the crossbeams are fixed to the two columns. Multiple segmented slide rails are provided along the length of each crossbeam on its upper surface and the inner surfaces of the two opposing crossbeams. Multiple expansion plates are installed on each segmented slide rail. The two inner right-angled surfaces of multiple corner plates are respectively attached to and fixed to the expansion plates on the upper and inner surfaces of the crossbeams, connecting the multiple expansion plates into a single structure. A product locator is installed on the two outer right-angled surfaces of the corner plates. Multiple reference points are provided on the surfaces of the ground, columns, crossbeams, expansion plates, and corner plates. During installation, a design method employing a progressive coordinate system, final stage error control, and thermal expansion control significantly improves the measurement accuracy of the horizontal wing box assembly, achieving high-precision measurement of the horizontal wing box assembly structure. This method has universal applicability to the measurement of similar horizontal wing box tooling structures.

Description

Technical Field

[0001] This application relates to the field of aircraft assembly technology, and in particular to a horizontal wing box assembly structure and its installation method. Background Technology

[0002] Currently, a large number of laser trackers and lidar are used for measurement in aircraft manufacturing equipment. In principle, laser measurement requires the establishment of reference points on the manufacturing equipment to create a coordinate system for coordinate measurement.

[0003] Large wing box assemblies typically employ vertical tooling structures, generally consisting of an integral truss frame. Measurements are primarily based on reference points on this frame, with local measurement compensation relying on the two expansion plates at the leading and trailing edges. While similar assemblies for the center wing also utilize horizontal assembly structures, they mostly employ a three-dimensional truss frame structure for reference point envelope settings. The coordinate system is constructed using the reference points of the overall frame as the benchmark. Both methods require reference to ground and main frame measurement points for coordinate system construction, calibration, and reconstruction. Local measurements also involve interactive verification using the ground coordinate system, frame coordinate system, and expansion plate coordinate system. Due to installation and transfer issues, in high-precision assembly processes with accuracy less than 0.1 mm / 10 m, the measurement accuracy of the assembly system can be significantly affected by the cumulative errors from multiple calibration layers.

[0004] The new large-scale double-beam horizontal wing box assembly system involves a progressive transformation relationship between the coordinate system of the ground, columns, beams, and expansion plates during installation and measurement. How to reasonably construct the coordinate system to improve the assembly accuracy of the system is an urgent problem to be solved. Summary of the Invention

[0005] The purpose of this application is to provide a coordinate system construction and calibration method for a double-beam horizontal wing box assembly structure. This method is suitable for high-precision measurement of large horizontal wing box assembly similar structural systems with an accuracy of less than 0.1 mm / 10 m using a laser tracker or lidar.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A horizontal wing box assembly structure includes multiple columns, crossbeams, expansion plates, and corner plates. The columns are divided into two rows and fixed to the ground at the positions of the front and rear edges of the horizontal wing box. Two crossbeams are fixed to the upper surfaces of the two rows of columns. Multiple segmented slide rails are provided along the length of the crossbeam on the upper surface of each crossbeam and the inner surfaces of the two opposing crossbeams. Multiple expansion plates are installed on each segmented slide rail. The ends of the expansion plates located at the ends of the crossbeams corresponding to the wing tips of the horizontal wing box are fixedly connected to the crossbeams. The two inner right-angled surfaces of multiple corner plates are respectively attached to and fixed to the expansion plates on the upper surface and inner surface of the crossbeams, connecting the multiple expansion plates into a single structure. The locators of the horizontal wing box are installed on the two outer right-angled surfaces of the corner plates. Multiple reference points are provided on the surfaces of the ground, columns, crossbeams, expansion plates, and corner plates.

[0008] Furthermore, the material of the expansion plate is the same as that of the main structural material of the horizontal wing box product.

[0009] The installation method and specific steps for this horizontal wing box assembly structure are as follows:

[0010] 1. Measure the reference points set on the ground and establish a ground coordinate system based on the measured values ​​of the reference points on the ground;

[0011] 2. Install all columns on the ground according to the theoretical positions of the reference points on the columns in the ground coordinate system;

[0012] 3. Establish a column coordinate system by measuring the reference points on the column;

[0013] 4. Install the crossbeam according to the theoretical position of the reference point on the crossbeam in the column coordinate system;

[0014] 5. Establish the beam coordinate system by measuring the reference points on the beam.

[0015] 6. Install all expansion plates according to the theoretical positions of the reference points on the expansion plates in the beam coordinate system;

[0016] 7. Establish the horizontal wing box assembly coordinate system by measuring the reference points on the expansion plate;

[0017] 8. Install the corner plate and the locator of the horizontal wing box on the corner plate according to the theoretical position of the corner plate and the locator in the horizontal wing box assembly coordinate system;

[0018] 9. Retain some ground-level benchmarks as foundation settlement monitoring points;

[0019] 10. Assemble the horizontal wing box product in the horizontal wing box assembly coordinate system;

[0020] 11. After assembling the wall panels and front and rear edges of the horizontal wing box product onto the locator, measure the reference points on the upper surfaces of the two crossbeams and the expansion plates close to the opposite inner surfaces, and establish a reset coordinate system based on the measured values.

[0021] 12. Under the reset coordinate system, measure the measurement points on the wall panel and the front and rear edges, and compare them with the theoretical values. When the product requirements are exceeded, the shape of the wall panel and the front and rear edges is milled and fitted on the horizontal wing box assembly structure on site until the horizontal wing box product meets the assembly requirements.

[0022] Furthermore, the settlement monitoring points are distributed in an array no larger than 5m, with no fewer than 3 rows and 9 settlement monitoring points in total in both the longitudinal and transverse directions.

[0023] The advantage of this application lies in the fact that by using a design method that involves a step-by-step approach to coordinate systems, error control in the final stage, and thermal expansion control, the measurement accuracy of the horizontal wing box assembly is greatly improved, achieving high-precision measurement of the horizontal wing box assembly structure. This method has universal applicability to the measurement of similar structures of horizontal wing box tooling.

[0024] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 A schematic diagram of a method for constructing and calibrating a coordinate system for a double-beam horizontal wing box assembly structure.

[0026] The numbers in the diagram are explained as follows: 1. Column; 2. Horizontal beam; 3. Expansion plate; 4. Angle plate; 5. Ground; 6. Positioner; 7. Reference point; 8. Ground coordinate system; 9. Column coordinate system; 10. Horizontal beam coordinate system; 11. Horizontal wing box assembly coordinate system; 12. Reset coordinate system. Detailed Implementation

[0027] See Figure 1 A horizontal wing box assembly structure includes multiple columns 1, crossbeams 2, expansion plates 3, and corner plates 4. The multiple columns 1 are divided into two rows and fixed on the ground 5 at the positions of the front and rear edges of the horizontal wing box. Two crossbeams 2 are fixed on the upper surfaces of the two rows of columns 1. Multiple segmented slide rails are provided along the length of the crossbeam on the upper surface of each crossbeam 2 and the inner surfaces of the two crossbeams 2. Multiple expansion plates 3 are installed on each segmented slide rail. The ends of the expansion plates 3 located at the ends of the crossbeams 2 corresponding to the wing tips of the horizontal wing box are fixedly connected to the crossbeams 2. The two inner right-angled surfaces of multiple corner plates are respectively attached to and fixed to the expansion plates 3 on the upper surface and inner surface of the crossbeams 2, connecting the multiple expansion plates 3 into an integrated structure. The locator 6 of the horizontal wing box is installed on the two outer right-angled surfaces of the corner plates. Multiple reference points 7 are provided on the structural surfaces of the ground 5, columns 1, crossbeams 2, expansion plates 3, and corner plates 4.

[0028] Furthermore, the material of the expansion plate 3 is the same as the main structural material of the horizontal wing box product.

[0029] The installation method and specific steps for this horizontal wing box assembly structure are as follows:

[0030] 1. Measure the reference point 7 set on the ground 5, and establish a ground coordinate system 8 based on the measured value of the reference point 7 on the ground 5;

[0031] 2. Install all columns 1 on the ground according to the theoretical position of the reference point 7 on the column in the ground coordinate system 8;

[0032] 3. Establish the column coordinate system 9 by measuring the reference point 7 on the column 1;

[0033] 4. Install the crossbeam 2 according to the theoretical position of the reference point 7 on the crossbeam 2 under the column coordinate system 9;

[0034] 5. Establish the beam coordinate system 10 by measuring the reference point 7 on the beam 2;

[0035] 6. Install all expansion plates 3 according to the theoretical position of the reference point 7 on the expansion plate 3 in the crossbeam coordinate system 10;

[0036] 7. Establish the horizontal wing box assembly coordinate system 11 by measuring the reference point 7 on the expansion plate 3;

[0037] 8. Install the corner plate 4 and the locator 6 of the horizontal wing box on the corner plate 4 according to the theoretical positions of the corner plate 4 and the locator 6 in the horizontal wing box assembly coordinate system 11.

[0038] 9. Some benchmark points on the ground surface 5 are retained as settlement monitoring points for the foundation;

[0039] 10. Under the horizontal wing box assembly coordinate system 11, assemble the horizontal wing box product;

[0040] 11 After assembling the wall panel and front and rear edges of the horizontal wing box product onto the locator 6, measure the reference point 7 on the upper surface of the two crossbeams 2 and the expansion plate 3 on the opposite inner side, and establish a reset coordinate system 12 based on the measured value.

[0041] 12. Under the reset coordinate system 12, measure the measurement points 7 on the wall panel and the front and rear edges, and compare them with the theoretical values. When the product requirements tolerance is exceeded, the shape of the wall panel and the front and rear edges is milled and fitted on the horizontal wing box assembly structure on site until the horizontal wing box product meets the assembly requirements.

[0042] Furthermore, the settlement monitoring points are distributed in an array no larger than 5m, with no fewer than 3 rows and 9 settlement monitoring points in total in both the longitudinal and transverse directions.

Claims

1. An installation method for a horizontal wing box assembly structure, characterized in that... The invention includes a horizontal wing box assembly structure comprising multiple columns, crossbeams, expansion plates, and corner plates. The columns are arranged in two rows fixed to the ground along the mounting axes of the front and rear edges of the horizontal wing box. Two crossbeams are fixed to the upper surfaces of the two rows of columns. Multiple segmented slide rails are provided along the length of each crossbeam on its upper surface and the inner surfaces of the two opposing crossbeams. Multiple expansion plates are installed on each segmented slide rail. The ends of the expansion plates located at the ends of the crossbeams corresponding to the wing tips of the horizontal wing box are fixedly connected to the crossbeams. The two inner right-angled surfaces of multiple corner plates are respectively attached to and fixed to the expansion plates on the upper and inner surfaces of the crossbeams, connecting the multiple expansion plates into a single structure. Positioners for the horizontal wing box are installed on the two outer right-angled surfaces of the corner plates. Multiple reference points are provided on the ground, columns, crossbeams, expansion plates, and corner plate structural surfaces. The specific installation steps are as follows: 1-1 Measure the reference points set on the ground and establish a ground coordinate system based on the measured values ​​of the reference points on the ground; 1-2 Install all columns on the ground according to the theoretical positions of the reference points on the columns in the ground coordinate system; 1-3 Establish the column coordinate system by measuring the reference points on the column; 1-4 Install the crossbeam according to the theoretical position of the reference point on the crossbeam in the column coordinate system; 1-5 Establish the beam coordinate system by measuring the reference points on the beam; 1-6 Install all expansion plates according to the theoretical positions of the reference points on the expansion plates in the beam coordinate system; 1-7 Establish the horizontal wing box assembly coordinate system by measuring the reference points on the expansion plate; 1-8 Install the corner plate and the locator of the horizontal wing box on the corner plate according to the theoretical position of the corner plate and the locator in the horizontal wing box assembly coordinate system; 1-9 Retain some benchmark points on the ground as settlement monitoring points for the foundation; 1-10 Assemble the horizontal wing box product in the horizontal wing box assembly coordinate system; 1-11 After assembling the wall panels and front and rear edges of the horizontal wing box product onto the locator, measure the reference points on the upper surfaces of the two crossbeams and the expansion plates close to the opposite inner surfaces, and establish a reset coordinate system based on the measured values. 1-12 Under the reset coordinate system, measure the measurement points on the wall panel and the front and rear edges, and compare them with the theoretical values. When the product requirements are exceeded, the shape of the wall panel and the front and rear edges is milled and fitted on the horizontal wing box assembly structure on site until the horizontal wing box product meets the assembly requirements.

2. The installation method of the horizontal wing box assembly structure according to claim 1, characterized in that... The material of the expansion plate is the same as that of the main structural material of the horizontal wing box product.

3. The installation method of a horizontal wing box assembly structure according to claim 1, characterized in that... The settlement monitoring points are distributed in an array no larger than 5m, with no fewer than 3 rows and 9 settlement monitoring points in total in both the longitudinal and transverse directions.

Images