A method of assembling a jig panel for an aircraft panel

Abstract

The present application belongs to the technical field of aircraft assembly connection, and relates to a kind of aircraft wallboard jig card plate assembly method, step one, in CATIA software, two process OTP points are determined according to two positioning holes on corner seat, and corner seat mounting surface is converted into OTS data;Step two, two process OTP point coordinate values and OTS data are imported into laser tracker operating system SA software;Step three, coordinate system is established with jig reference on jig, and corner seat is roughly adjusted to position using two process OTP points;Step four, corner seat is finely adjusted to position using corner seat OTS data, and bolt pre-positioning is installed;Step five, card plate is installed on corner seat, and firmly fixed with fine bolt.Step six, OTP hole on card plate is re-measured using laser tracker, to determine that card plate installation position meets standard requirements;Step seven, in CATIA software, one plane of card plate is extracted as OTS data recognizable by laser tracker, and flatness of extracted plane is rechecked using laser tracker.

Description

Technical Field

[0001] This invention belongs to the field of aircraft assembly and connection technology, and relates to a method for assembling aircraft panel frame clamps. Background Technology

[0002] The clamping plate is the most basic positioning component in aircraft panel frames. It is usually a slender, enclosed structure with both ends connected to corner brackets and installed on the main frame. During the installation and debugging of the clamping plate, in order to ensure the accuracy of the OTP points (optical tooling points, which are control points given in the tooling design to determine the spatial position of tooling components, also called optical tooling spheres, or OTP points for short, which contain three-dimensional theoretical coordinate values ​​to verify the deviation between the theoretical and actual positions of the clamping plate), it is necessary to adjust the corner brackets to make the measured OTP values ​​on the clamping plate meet the tolerance requirements of the theoretical values. Due to the large size of the clamping plate, the difficulty of installation, and the long time required, as well as the uneven force on the corner brackets at both ends, the clamping plate may be slightly twisted and deformed, resulting in potential problems such as poor assembly quality and inability to disassemble the clamping plate smoothly. Summary of the Invention

[0003] The purpose of this invention is to provide a method for assembling aircraft panel frame clamps, which solves the problems of low efficiency and deformation caused by high assembly stress during the installation of aircraft panel frame clamps.

[0004] Technical solution

[0005] A method for assembling aircraft panel frame clamps includes the following steps:

[0006] Step 1: In CATIA software, determine two process OTP points based on the two positioning holes on the corner bracket, and convert the corner bracket mounting surface into OTS data;

[0007] Step 2: Import the coordinates of the two process OTP points and the OTS data into the SA software of the laser tracker operating system;

[0008] Step 3: Establish a coordinate system based on the tooling reference on the jig, and use two process OTP points to roughly adjust the corner bracket into place;

[0009] Step 4: Using the corner bracket OTS data, taking into account the coarse adjustment results, finely adjust the corner bracket to the correct position and pre-position the installation bolts;

[0010] Step 5: Install the card plate onto the corner bracket and secure it firmly with precision bolts;

[0011] Step 6: Use a laser tracker to re-measure the OTP holes on the card to confirm that the card installation position meets the standard requirements;

[0012] Step 7: In CATIA software, extract one plane of the card into OTS data that can be recognized by the laser tracker, import it into the laser tracker SA application software, and use the laser tracker to re-inspect the flatness of the extracted plane.

[0013] Furthermore, in step one, the process of determining the two process OTP points based on the two positioning holes on the corner bracket is as follows:

[0014] In CATIA software, in the aircraft coordinate system, draw the centers of the two positioning holes on the corner mount, and then draw a normal line perpendicular to the mounting surface of the corner mount with the center as the starting point. Cut a line segment of length L on the normal line, and take the end point of the line segment as the process OTP point. Extract the X, Y, and Z coordinate values ​​of the point as the OTP point coordinate values. L is equal to the diameter of the laser target ball.

[0015] Furthermore, in step one, the process of converting the corner bracket mounting surface into OTS data is as follows: the theoretical shape of the corner bracket and the mounting plate is converted into a digital model and stored in STP format to form OTS theoretical data.

[0016] Furthermore, in step three, the coarse adjustment process is as follows:

[0017] The coordinate values ​​of the six tooling reference points on the fixture are collected by the laser tracker and fitted to establish a coordinate system. According to the coordinate values ​​of the two process OTP points of the corner seat, the laser target is inserted into the positioning hole using the laser tracker. After checking that there is no shaking during insertion, the laser target ball is placed in the center of the laser target seat. Then, the laser target ball is connected to the laser tracker through the light source and the data is monitored in real time. By changing the posture of the corner seat, the process OTP point coordinate values ​​are made close to the theoretical values ​​and controlled within ±0.05mm.

[0018] Following the same steps, both positioning holes on the corner bracket were adjusted to within ±0.05mm, thus determining the five degrees of freedom of the corner bracket, and the corner bracket was coarsely adjusted to the correct position.

[0019] Furthermore, in step four, the adjustment process for OTP and OTS is as follows:

[0020] Using the extracted OTS data from the corner mount mounting surface, while ensuring the process OTP point coordinates remain unchanged, the connection surface between the corner mount and the clamping plate is ensured to conform to theoretical data by rotating around the line connecting the two process OTP points on the corner mount. Nine measurement points are taken on the connection surface between the corner mount and the clamping plate, and the laser target ball is placed at each of the nine measurement points. By comparing the measured data and theoretical data with the laser tracker, the deviation direction is analyzed. The corner mount is rotated around the line connecting the two process OTP points, and its posture is continuously adjusted to ensure that the OTS data is controlled within ±0.05mm. When the data of all nine measurement points meet the accuracy requirement of ±0.05mm, the laser target mount is inserted into the positioning hole again. After checking that there is no shaking during insertion, the laser target ball is placed in the center of the laser target mount. The laser target ball is then connected to the laser tracker through the light source, and the data is monitored in real time. The coordinate values ​​of the process OTP points are within ±0.05mm. When both the process OTP point value and the OTS value meet the accuracy requirement of ±0.05mm, the six degrees of freedom of the corner mount are fixed, and the corner mount has been finely adjusted.

[0021] Furthermore, the selection process for the 9 measurement points is as follows: one point is taken at each of the four corners of the mounting surface, 20mm from the edge, for a total of 4 points; one point is taken at the midpoint of a line connecting every two points, and overlapping points are eliminated, for a total of 5 points.

[0022] Furthermore, in step six, the process is as follows:

[0023] The OTP hole of the card plate is re-measured using a laser tracker. A coordinate system is established with the tooling reference point on the fixture. According to the OTP coordinate values ​​given in the drawing, the laser target holder is inserted into the OTP hole of the card plate using the laser tracker. After checking that there is no shaking during insertion, the laser target ball is placed in the center of the laser target holder. Then, the laser target ball is connected to the laser tracker through a light source and the data is monitored in real time. When the theoretical value and the actual value of the OTP hole coordinate are within ±0.05mm, it meets the standard requirements.

[0024] Furthermore, in step seven, the process is as follows:

[0025] In CATIA software, the card plate plane is extracted into OTS data that can be recognized by the laser tracker and imported into the laser tracker SA application software. 10 to 15 measurement points are selected on the card plate plane according to the "W" shaped trajectory, with a distance of 100mm to 200mm between each point. The laser target ball is placed at each of the 10 to 15 measurement points. By comparing the actual measured data and theoretical data of the laser tracker, if the flatness deviation is controlled within 0.1mm, then the card plate will not have stress deformation.

[0026] Beneficial effects:

[0027] This method has low installation cost, simple tools, simplified operation, and is easy to use, resulting in high installation efficiency. Attached Figure Description

[0028] This invention includes four accompanying drawings, and the drawings and their descriptions are as follows:

[0029] Figure 1 This is a schematic diagram of a typical aircraft panel frame structure;

[0030] Among them: 1-corner seat, 2-plate, 3-main frame, 4-tooling reference point.

[0031] Figure 2 This is a schematic diagram of the corner bracket structure;

[0032] Among them: 1-1 corner seat and card plate connection hole, 1-2 corner seat and card plate connection surface.

[0033] Figure 3 This is a schematic diagram of the card plate structure;

[0034] Among them: 2-1 Card plate OTP hole, 2-2 Card plate plane.

[0035] Figure 4 This is a schematic diagram of the corner bracket installation;

[0036] Among them: 1-1 Corner seat and card plate connection hole, 1-2 Corner seat and card plate connection surface, 1-3 Laser target seat, 1-4 Laser target ball. Detailed Implementation

[0037] This invention provides a method for assembling aircraft panel frame clamps. Using CATIA software, the OTP (Optical Tooling Surface) values ​​on the clamp are converted to the positioning holes of the corner brackets, establishing process OTP points. The mounting surfaces of the corner brackets and the clamp are then converted to OTS (Optical Tooling Surfaces, defined during tooling design to determine the spatial position of tooling components) data. This ensures accurate positioning of the two holes and one surface. The precise positioning of the corner brackets ultimately guarantees the accuracy of the clamp's mounting position, thus ensuring stress-free assembly of the clamp. This method includes the following steps:

[0038] Step 1: In CATIA software, convert the two positioning holes on the corner bracket that are connected to the card plate into laser coordinate values ​​in the aircraft coordinate system, and convert the mounting surface into OTS data.

[0039] Step 2: Import the corner mount process OTP coordinate values ​​and OTS data into the laser tracker operating system SA software;

[0040] Step 3: Establish a coordinate system based on the tooling reference on the fixture, and use the corner bracket process OTP coordinate values ​​to roughly adjust the corner bracket into place;

[0041] Step 4: Using the corner bracket OTS data and taking into account the process OTP coarse adjustment results, adjust the OTP and OTS to the correct position, and install the bolts between the corner bracket and the frame to tighten and pre-position them.

[0042] Step 5: Install the card plate on the corner bracket and secure it firmly with precision bolts.

[0043] Step 6: Use a laser tracker to re-measure the OTP points on the card to confirm that the card installation position meets the standard requirements.

[0044] Step 7: In CATIA software, extract one plane of the card into OTS data that can be recognized by the laser tracker, import it into the laser tracker SA application software, and use the laser tracker to re-inspect the flatness of the extracted plane. If the flatness is within 0.1mm, it can be verified that the card does not have stress deformation.

[0045] Example

[0046] Combined with appendix Figure 1 A method for assembling panel bracket clamps is proposed. The traditional assembly method, which connects the existing 2-clamp to the 1-corner bracket and ensures the positional tolerance of the 2-clamp by adjusting the OTP holes on the 2-clamp, is optimized by converting the mounting holes of the 1-corner bracket connected to the 2-clamp into process laser values ​​in the aircraft coordinate system of CATIA software, extracting the OTS data of the 1-corner bracket connection surface, using a laser tracker to accurately adjust the position of the 1-corner bracket, and then installing the 2-clamp onto the corner bracket. The OTP points of the 2-clamp are then re-measured to ensure the correctness of the clamp position. This method includes the following steps:

[0047] Step 1: In CATIA software, locate the center of the connection hole 1-1 between the corner bracket and the plate in the aircraft coordinate system. Then, draw a normal line perpendicular to the mounting surface 1-2, starting from the center. Mark 12.7mm as the endpoint on the normal line and use this endpoint as the process OTP point. Extract the X, Y, and Z coordinate values ​​of this point for theoretical values ​​when adjusting the laser tracker. Repeat the same steps to calculate and extract the X, Y, and Z coordinate values ​​of the process OTP points for the two connection holes on the corner bracket 1. In CATIA software, convert the theoretical shape of the connection surface 1-2 between the corner bracket and the plate into a digital model and save it in STP format to form the OTS theoretical data.

[0048] Step 2: Import the process OTP coordinate values ​​of the corner bracket and the card plate connection hole 1-1 and the OTS data of the corner bracket and the card plate connection surface 1-2 into the laser tracker operating system SA software;

[0049] Step 3: Using the tooling reference point 4 on the fixture, a total of 6 coordinate values ​​are collected by a laser tracker and fitted to establish a coordinate system. According to the process OTP coordinate values ​​of the corner bracket and the plate connection hole 1-1, the laser target bracket 1-3 with a tail rod of Φ10h7 and a backward movement of 12.7mm is inserted into the connection hole 1-1 using a laser tracker. After checking that there is no shaking during insertion, the laser target ball 1-4 with a diameter of Φ12.7 is placed in the center of the laser target bracket 1-3. Then, the laser target ball 1-4 is connected to the laser tracker through a light source and the data is monitored in real time. By changing the posture of the corner bracket, the process OTP coordinates are kept close to the theoretical value and controlled within ±0.05mm. The same steps are used to adjust the two connection holes on the corner bracket 1 to within ±0.05mm. Through this step, the five degrees of freedom of the corner bracket 1 are determined from two points, and the corner bracket 1 has been coarsely adjusted to the correct position.

[0050] Step four: Using the extracted OTS theoretical data of the corner bracket and clamping plate connection surface 1-2, while ensuring that the process OTP coordinates remain unchanged, rotate the corner bracket 1 around the line formed by the two process OTP points to ensure that the corner bracket and clamping plate connection surface 1-2 conforms to the theoretical data. Take 9 measurement points on the corner bracket and clamping plate connection surface 1-2 (one point at each of the four corners of the mounting surface 20mm from the edge, for a total of 4 points; one point at the midpoint of the line connecting every two points, excluding overlapping points, for a total of 5 points). Place the Φ12.7 diameter laser target ball 1-4 at the 9 measurement points respectively. By comparing the measured data and theoretical data with the laser tracker, analyze the deviation direction, and rotate the corner bracket 1 around the line formed by the two process OTP points to continuously adjust its posture. To ensure that the OTS data is controlled within ±0.05mm, after the data of all 9 measurement points meet the accuracy requirement of ±0.05mm, the laser target holder 1-3 with a tail rod of Φ10h7 and a backlash of 12.7mm is inserted into the connecting hole 1-1 again. After checking that there is no shaking during insertion, the laser target ball 1-4 with a diameter of Φ12.7 is placed in the center of the laser target holder 1-3. Then, the laser target ball 1-4 is connected to the laser tracker through the light source and the data is monitored in real time. The coordinate value of the process OTP point should meet the requirement of ±0.05mm. When the process OTP point value and the OTS value meet the accuracy requirement of ±0.05mm at the same time, the 6 degrees of freedom of the corner seat 1 are fixed and the corner seat 1 is finely adjusted into place. Then, the bolts between the corner seat 1 and the frame 3 are installed to tighten and pre-position.

[0051] Step 5: Install the card plate 2 on the corner bracket 1 and secure it firmly with precision bolts.

[0052] Step 6: Re-measure the OTP hole 2-1 of the card plate using a laser tracker. Using the tooling reference point 4 on the jig, collect coordinate values ​​from 6 locations using the laser tracker and fit them to establish a coordinate system. According to the OTP coordinate values ​​given in the drawing, insert the laser target holder 1-3 (Φ8h7, 12.7mm backlash) into the connecting hole 2-1 using the laser tracker. After checking for any shaking during insertion, place the laser target ball 1-4 (Φ12.7mm) at the center of the laser target holder 1-3. Then connect the laser target ball 1-4 to the laser tracker via a light source and monitor the data in real time. Since the tolerance of the process OTP point values ​​has been tightened (±0.05mm), the ±0.12mm requirement for the card plate OTP hole 2-1 in the drawing is fully met. Therefore, the installation position of the card plate 2 meets the standard requirements.

[0053] Step 7: In CATIA software, extract the OTS data of the card plate plane 2-2 into the laser tracker and import it into the laser tracker SA application software. Select 10 to 15 measurement points on the card plate plane 2-2 according to the "W" shaped trajectory (take any point within 50mm to the side of the OTP point at the end of the card plate as the first point), with a distance of 100mm to 200mm between each point. Place the laser target ball 1-4 with a diameter of Φ12.7 at the 10 to 15 measurement points respectively. By comparing the actual measurement data and theoretical data of the laser tracker, if the flatness deviation is controlled within 0.1mm, it can be verified that there is no stress deformation of the card plate.

Claims

1. A method for assembling aircraft panel frame clamps, characterized in that: Includes the following steps: Step 1: In CATIA software, determine two process OTP points based on the two positioning holes on the corner bracket, and convert the corner bracket mounting surface into OTS data; Step 2: Import the coordinates of the two process OTP points and the OTS data into the SA software of the laser tracker operating system; Step 3: Establish a coordinate system based on the tooling reference on the jig, and use two process OTP points to roughly adjust the corner bracket into place; Step 4: Using the corner bracket OTS data, taking into account the coarse adjustment results, finely adjust the corner bracket to the correct position and pre-position the installation bolts; Step 5: Install the card plate onto the corner bracket and secure it firmly with precision bolts; Step 6: Use a laser tracker to re-measure the OTP holes on the card to confirm that the card installation position meets the standard requirements; Step 7: In CATIA software, extract one plane of the card into OTS data that can be recognized by the laser tracker, import it into the laser tracker SA application software, and use the laser tracker to re-inspect the flatness of the extracted plane.

2. The method according to claim 1, characterized in that: In step one, the process of determining the two process OTP points based on the two positioning holes on the corner bracket is as follows: In CATIA software, in the aircraft coordinate system, draw the centers of the two positioning holes on the corner mount, and then draw a normal line perpendicular to the mounting surface of the corner mount with the center as the starting point. Cut a line segment of length L on the normal line, and take the end point of the line segment as the process OTP point. Extract the X, Y, and Z coordinate values ​​of the point as the OTP point coordinate values. L is equal to the diameter of the laser target ball.

3. The method according to claim 2, characterized in that: In step one, the process of converting the corner bracket mounting surface into OTS data is as follows: the theoretical shape of the corner bracket and the mounting plate is converted into a digital model and stored in STP format to form OTS theoretical data.

4. The method according to claim 3, characterized in that: In step three, the coarse adjustment process is as follows: The coordinate values ​​of the six tooling reference points on the fixture are collected by the laser tracker and fitted to establish a coordinate system. According to the coordinate values ​​of the two process OTP points of the corner seat, the laser target is inserted into the positioning hole using the laser tracker. After checking that there is no shaking during insertion, the laser target ball is placed in the center of the laser target seat. Then, the laser target ball is connected to the laser tracker through the light source and the data is monitored in real time. By changing the posture of the corner seat, the process OTP point coordinate values ​​are made close to the theoretical values ​​and controlled within ±0.05mm. Following the same steps, both positioning holes on the corner bracket were adjusted to within ±0.05mm, thus determining the five degrees of freedom of the corner bracket, and the corner bracket was coarsely adjusted to the correct position.

5. The method according to claim 4, characterized in that: In step four, the adjustment process for OTP and OTS is as follows: Using the extracted OTS data from the corner mount mounting surface, while ensuring the process OTP point coordinates remain unchanged, the connection surface between the corner mount and the clamping plate is ensured to conform to theoretical data by rotating around the line connecting the two process OTP points on the corner mount. Nine measurement points are taken on the connection surface between the corner mount and the clamping plate, and the laser target ball is placed at each of the nine measurement points. By comparing the measured data and theoretical data with the laser tracker, the deviation direction is analyzed. The corner mount is rotated around the line connecting the two process OTP points, and its posture is continuously adjusted to ensure that the OTS data is controlled within ±0.05mm. When the data of all nine measurement points meet the accuracy requirement of ±0.05mm, the laser target mount is inserted into the positioning hole again. After checking that there is no shaking during insertion, the laser target ball is placed in the center of the laser target mount. The laser target ball is then connected to the laser tracker through the light source, and the data is monitored in real time. The coordinate values ​​of the process OTP points are within ±0.05mm. When both the process OTP point value and the OTS value meet the accuracy requirement of ±0.05mm, the six degrees of freedom of the corner mount are fixed, and the corner mount has been finely adjusted.

6. The method according to claim 5, characterized in that: The selection process for the 9 measurement points is as follows: take 1 point at each of the 4 corners of the mounting surface, 20mm from the edge, for a total of 4 points; take 1 point at the midpoint of the line connecting every 2 points, and eliminate overlapping points, for a total of 5 points.

7. The method according to claim 6, characterized in that: Step six involves the following process: The OTP hole of the card plate is re-measured using a laser tracker. A coordinate system is established with the tooling reference point on the fixture. According to the OTP coordinate values ​​given in the drawing, the laser target holder is inserted into the OTP hole of the card plate using the laser tracker. After checking that there is no shaking during insertion, the laser target ball is placed in the center of the laser target holder. Then, the laser target ball is connected to the laser tracker through a light source and the data is monitored in real time. When the theoretical value and the actual value of the OTP hole coordinate are within ±0.05mm, it meets the standard requirements.

8. The method according to claim 7, characterized in that: Step seven involves the following process: In CATIA software, the card plate plane is extracted into OTS data that can be recognized by the laser tracker and imported into the laser tracker SA application software. 10 to 15 measurement points are selected on the card plate plane according to the "W" shaped trajectory, with a distance of 100mm to 200mm between each point. The laser target ball is placed at each of the 10 to 15 measurement points. By comparing the actual measured data and theoretical data of the laser tracker, if the flatness deviation is controlled within 0.1mm, then the card plate will not have stress deformation.

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