Aircraft panel fixture clamping plate assembling method

Abstract

The invention belongs to the technical field of aircraft assembly and connection, and relates to an aircraft panel fixture clamping plate assembly method, which comprises the following steps of: 1, in CATIA software, determining two process OTP points according to two positioning holes in an angle seat, and converting an angle seat mounting surface into OTS data; 2, importing the coordinate values of the two process OTP points and OTS data into SA software of a laser tracker operating system; step 3, establishing a coordinate system based on a tool reference on the fixture, and roughly adjusting the angle seat in place by using two process OTP points; step 4, accurately adjusting the angle seat in place by using the OTS data of the angle seat, and installing a bolt for pre-positioning; and fifthly, the clamping plates are installed on the angle seats and firmly fixed through refined bolts. Sixthly, the OTP holes in the cardboard are measured again through the laser tracker, so that it is determined that the mounting position of the cardboard meets the standard requirement; and step 7, in CATIA software, extracting one plane of the card board as OTS data which can be identified by the laser tracker, and rechecking and extracting the flatness of the plane by using the laser tracker.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft assembly connection, and relates to an aircraft wall panel frame clamping plate assembly method. Background Art

[0002] The pallet is the most basic positioning part in the aircraft wall panel jig. It is mostly installed on the main frame in a slender, closed structure with both ends connected to the angle seat. During the installation and debugging of the pallet, in order to ensure the correctness of the OTP points (optical tooling points, given in the tooling design process, control points used to determine the spatial position of tooling components, called optical tooling points, referred to as OTP points, which contain three-dimensional theoretical coordinate values ​​for verifying the deviation between the theoretical position and the actual position of the pallet), it is necessary to adjust the angle seat to achieve the OTP measured value on the pallet to meet the tolerance requirements of the theoretical value. Due to the large specifications of the pallet, the difficulty of installation, the long time consumption, and the uneven force on the angle seats at both ends, the pallet is slightly twisted and deformed, resulting in potential hidden dangers such as poor assembly quality and the inability to disassemble the pallet smoothly. Summary of the invention

[0003] The purpose of the present invention is to provide an aircraft wall panel frame clamp assembly method to solve the problem of low efficiency and deformation of the aircraft frame clamp during installation.

[0004] Technical Solution

[0005] An aircraft wall panel frame clamp assembly method comprises the following steps:

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

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

[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 seat into place;

[0009] Step 4: Use the OTS data of the angle seat and take into account the rough adjustment results to fine-tune the angle seat into place and install the bolts for pre-positioning;

[0010] Step 5: Install the card plate on the corner seat and secure it with refined bolts;

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

[0012] Step 7. In CATIA software, extract a plane of the pallet as OTS data recognizable by the laser tracker, import it into the laser tracker SA application software, and use the laser tracker to recheck the flatness of the extracted plane.

[0013] Further, in step 1, the process of determining two process OTP points according to the two positioning holes on the corner seat is as follows:

[0014] In CATIA software, in the aircraft coordinate system, make the center of the two locating holes on the corner seat, and then make a normal line perpendicular to the corner seat installation surface with the center of the circle as the starting point. Intercept a line segment of length L on the normal line, and use 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 value, and L is equal to the diameter of the laser target ball.

[0015] Furthermore, in step one, the process of converting the corner seat mounting surface into OTS data is as follows: converting the theoretical shape of the corner seat and the mounting surface of the card board into a digital model, and storing it in STP format to form OTS theoretical data.

[0016] Further, in step three, the rough adjustment process is as follows:

[0017] The six tooling reference points on the jig are fitted with the coordinate values ​​collected by the laser tracker to establish a coordinate system. According to the coordinate values ​​of the two process OTP points of the corner seat, the laser target seat is inserted into the positioning hole using the laser tracker. After insertion and inspection without shaking, the laser target ball is placed in the center of the laser target seat. The laser target ball is then 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 coordinate value of the process OTP point is made close to the theoretical value and controlled within ±0.05mm.

[0018] Use the same steps to adjust the two positioning holes on the angle seat to within ±0.05mm. At this point, the five degrees of freedom of the angle seat are determined and the angle seat is roughly adjusted into place.

[0019] Furthermore, in step 4, the OTP and OTS adjustment process is as follows:

[0020] Utilizing the extracted OTS data of the corner seat mounting surface, while ensuring that the coordinate value of the process OTP point does not change, by rotating around the line formed by the two process OTP points on the corner seat, ensure that the connection surface between the corner seat and the pallet meets the theoretical data: 9 measurement points are taken on the connection surface between the corner seat and the pallet, and the laser target ball is placed at the 9 measurement points respectively. By comparing the measured data of the laser tracker with the theoretical data, the deviation direction is analyzed, and the corner seat is rotated around the line formed by the two process OTP points, and the posture is continuously adjusted to ensure that the OTS data is controlled within ±0.05mm. When the data at the 9 measurement points meet the accuracy requirement of ±0.05, the laser target seat is inserted into the positioning hole again. After the insertion is checked for shaking, the laser target ball is placed in the center of the laser target seat. 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 value of the process OTP point meets the accuracy requirement of ±0.05mm at the same time. The 6 degrees of freedom of the corner seat have been fixed and the corner seat has been fine-tuned in place.

[0021] Furthermore, the process of selecting 9 measurement points is as follows: 1 point is selected at each of the 4 corners of the installation surface 20 mm away from the edge, for a total of 4 points; 1 point is selected at the midpoint of a line connecting every 2 points, and overlapping points are eliminated, for a total of 5 points.

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

[0023] Use the laser tracker to remeasure the OTP hole of the pallet, establish a coordinate system with the tooling reference point on the jig, and insert the laser target holder into the OTP hole of the pallet using the laser tracker according to the OTP coordinate value given in the drawing. After insertion and inspection for shake, place the laser target ball in the center of the laser target holder, then connect the laser target ball to the laser tracker through the light source and monitor the data in real time. When the theoretical value and actual value of the OTP hole coordinate are within ±0.05mm, it meets the standard requirements.

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

[0025] In CATIA software, the pallet plane is extracted as OTS data recognizable by the laser tracker and imported into the laser tracker SA application software. 10 to 15 measuring points are selected on the pallet plane according to the "W"-shaped trajectory, with a distance of 100 mm to 200 mm between each point. The laser target ball is placed at 10 to 15 measuring points respectively. By comparing the measured data and theoretical data of the laser tracker, if the flatness deviation is controlled within 0.1 mm, there is no stress deformation on the pallet.

[0026] Beneficial effects:

[0027] The method has low installation cost, simple tools, simplified operation, convenient use and high installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention includes 4 drawings, and the drawings and the descriptions of the drawings are as follows:

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

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

[0031] Figure 2 It is a structural diagram of the corner seat;

[0032] Among them: 1-1 is the connection hole between the angle seat and the card plate, 1-2 is the connection surface between the angle seat and the card plate.

[0033] Figure 3 It is a structural diagram of the pallet;

[0034] Among them: 2-1 card board OTP hole, 2-2 card board plane.

[0035] Figure 4 This is the installation diagram of the corner seat;

[0036] Among them: 1-1 angle seat and card plate connection hole, 1-2 angle seat and card plate connection surface, 1-3 laser target seat, 1-4 laser target ball. DETAILED DESCRIPTION

[0037] The present invention provides an aircraft wall panel jig pallet assembly method, which converts the OTP point value on the jig pallet to the angle seat positioning hole through CATIA software, establishes the process OTP point, and converts the installation surface of the angle seat and the pallet into OTS (Optical Tooling Surfaces, which is given in the tooling design process and is used to determine the surface and axis of the spatial position of tooling components, called optical characteristic surface, referred to as OTS) data, to ensure the accurate positioning of 2 holes and 1 surface, and ultimately ensures the accuracy of the installation position of the pallet through the precise positioning of the angle seat, thereby ensuring the stress-free assembly of the pallet. The method comprises the following steps:

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

[0039] Step 2: Import the OTP coordinate value and OTS data of the corner seat process into the laser tracker operating system SA software;

[0040] Step 3: Establish a coordinate system based on the tooling reference on the jig, and use the OTP coordinate value of the corner seat process to roughly adjust the corner seat into place;

[0041] Step 4: Use the OTS data of the corner seat and take into account the rough adjustment results of the process OTP to adjust the OTP and OTS into place, and install the bolts of the corner seat and the frame to play a role in pressing and pre-positioning;

[0042] Step 5: Install the bracket on the corner seat and secure it with refined bolts.

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

[0044] Step seven: In CATIA software, extract a plane of the pallet as OTS data recognizable by the laser tracker, import it into the laser tracker SA application software, and use the laser tracker to recheck the flatness of the extracted plane. If the flatness is within 0.1mm, it can be verified that there is no stress deformation on the pallet.

[0045] Example

[0046] Combined with Figure 1 A wall panel frame card assembly method, connecting the original 2-card to the 1-angle seat, and adjusting the OTP hole position on the 2-card to ensure the position tolerance of the 2-card. The traditional assembly method is optimized to convert the mounting hole of the 1-angle seat connected to the 2-card to a process laser value in the CATIA software aircraft coordinate system, and extract the OTS data of the 1-angle seat connection surface, and use a laser tracker to accurately adjust the position of the 1-angle seat, and then install the 2-card to the angle seat, and re-measure the OTP point position of the 2-card to ensure the correctness of the card position. The method includes the following steps:

[0047] Step 1. In CATIA software, make the center of the connection hole 1-1 between the angle seat and the cardboard in the aircraft coordinate system, then make a normal line perpendicular to the 1-2 mounting surface with the center of the circle as the starting point, intercept 12.7mm on the normal line as the end point, and use the end point as the process OTP point to extract the X, Y, and Z coordinate values ​​of the point for the theoretical value of laser tracker adjustment. In the same steps, calculate and extract the X, Y, and Z coordinate values ​​of the process OTP points of the two connection holes on the angle seat 1; in CATIA software, convert the theoretical shape of the angle seat and the cardboard connection surface 1-2 into a digital model and store it in STP format to form OTS theoretical data;

[0048] Step 2: Import the OTP coordinate value of the corner seat and the card board connection hole 1-1 and the OTS data of the corner seat and the card board connection surface 1-2 into the laser tracker operating system SA software;

[0049] Step three, use the laser tracker to collect coordinate values ​​of 6 tooling reference points 4 on the jig, and then fit them to establish a coordinate system. According to the process OTP coordinate value of the connection hole 1-1 between the corner seat and the card plate, use the laser tracker to insert the laser target seat 1-3 with a tail rod of Φ10h7 and a retreat of 12.7mm into the connection hole 1-1. After insertion and inspection without shaking, place the laser target ball 1-4 with a diameter of Φ12.7 at the center of the laser target seat 1-3. Then connect the laser target ball 1-4 to the laser tracker through the light source and monitor the data in real time. By changing the posture of the corner seat, ensure that the process OTP coordinate is close to the theoretical value and controlled within ±0.05mm. In the same step, adjust the two connection holes on the corner seat 1 to within ±0.05mm. Through this step, the 5 degrees of freedom of the corner seat 1 are determined by 2 points, and the corner seat 1 has been roughly adjusted in place;

[0050] Step 4, using the extracted OTS theoretical data of the corner seat and the cardboard connection surface 1-2, while ensuring that the process OTP coordinates do not change, by rotating around the line formed by the two process OTP points on the corner seat 1, ensure that the corner seat and the cardboard connection surface 1-2 conform to the theoretical data: take 9 measurement points on the corner seat and the cardboard connection surface 1-2 (take 1 point at each of the 4 corners of the installation surface 20mm away from the edge, a total of 4 points; take 1 point at the midpoint of each 2 points connected by a line, and exclude the overlapping points, a total of 5 points), place the laser target balls 1-4 with a diameter of Φ12.7 at the 9 measurement points, respectively, compare the measured data of the laser tracker with the theoretical data, analyze the deviation direction, let the corner seat 1 rotate around the line formed by the two process OTP points, and constantly adjust the posture, Ensure that the OTS data is controlled within ±0.05mm. When the data of the 9 measuring points meet the accuracy requirement of ±0.05, insert the laser target seat 1-3 with a tail rod of Φ10h7 and a retreat of 12.7mm into the connecting hole 1-1 again. After inserting and checking that there is no shaking, place the laser target ball 1-4 with a diameter of Φ12.7 at the center of the laser target seat 1-3. Then connect the laser target ball 1-4 to the laser tracker through the light source and monitor the data in real time. The coordinate value of the process OTP point should meet the accuracy requirement of ±0.05mm. When the process OTP point value and OTS value meet the accuracy requirement of ±0.05mm at the same time, the 6 degrees of freedom of the corner seat 1 have been fixed, and the corner seat 1 has been fine-tuned in place. Then, install the bolts of the corner seat 1 and the frame 3 to play a role in pressing and pre-positioning.

[0051] Step 5: Install the clamping plate 2 on the angle seat 1 and secure it with refined bolts.

[0052] Step 6, re-measure the OTP hole 2-1 of the cardboard using a laser tracker. The coordinate values ​​of the tooling reference points 4 on the jig are collected by the laser tracker for fitting, and a coordinate system is established. According to the OTP coordinate values ​​given in the drawing, the laser target seat 1-3 with a tail rod of Φ8h7 and a setback of 12.7mm is inserted into the connecting hole 2-1 using a laser tracker. After the insertion is checked for shaking, the laser target ball 1-4 with a diameter of Φ12.7 is placed in the center of the laser target seat 1-3, and 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. Since the tolerance of the process OTP point value is tightened (±0.05mm), the ±0.12mm of the cardboard OTP hole 2-1 required in the drawing can be fully met, thereby determining that the installation position of the cardboard 2 meets the standard requirements.

[0053] Step seven, in CATIA software, extract the pallet plane 2-2 as OTS data recognizable by the laser tracker, import it into the laser tracker SA application software, select 10 to 15 measuring points on the pallet plane 2-2 according to the "W"-shaped trajectory (select any point within 50mm to the side of the OTP point at the end of the pallet as the first point), the distance between each point is 100mm to 200mm, and place the laser target ball 1-4 with a diameter of Φ12.7 at 10 to 15 measuring points respectively. By comparing the measured data and theoretical data of the laser tracker, the flatness deviation is controlled within 0.1mm to verify that there is no stress deformation on the pallet.

Claims

1. An aircraft wall panel frame plate assembly method, characterized in that: The following steps are involved: Step 1: In CATIA software, determine two process OTP points according to the two positioning holes on the corner seat, and convert the corner seat mounting surface into OTS data; Step 2: Import the coordinate values ​​of the two process OTP points and OTS data into the laser tracker operating system SA software; 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 seat into place; Step 4: Use the OTS data of the angle seat and take into account the rough adjustment results to fine-tune the angle seat into place and install the bolts for pre-positioning; Step 5: Install the card plate on the corner seat and secure it with refined bolts; Step 6: Use a laser tracker to re-measure the OTP holes on the card board to confirm that the card board installation position meets the standard requirements; Step 7. In CATIA software, extract a plane of the pallet as OTS data recognizable by the laser tracker, import it into the laser tracker SA application software, and use the laser tracker to recheck the flatness of the extracted plane.

2. The method according to claim 1, characterized in that: In step 1, the process of determining two process OTP points based on the two positioning holes on the corner seat is as follows: In CATIA software, in the aircraft coordinate system, make the center of the two locating holes on the corner seat, and then make a normal line perpendicular to the corner seat installation surface with the center of the circle as the starting point. Intercept a line segment of length L on the normal line, and use 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 value, and L is equal to the diameter of the laser target ball.

3. The device according to claim 2, characterized in that: In step 1, the process of converting the corner seat mounting surface into OTS data is as follows: converting the theoretical shape of the corner seat and the mounting surface of the card board into a digital model and storing it in STP format to form OTS theoretical data.

4. The device according to claim 3, characterized in that: In step 3, the rough adjustment process is as follows: The six tooling reference points on the jig are fitted with the coordinate values ​​collected by the laser tracker to establish a coordinate system. According to the coordinate values ​​of the two process OTP points of the corner seat, the laser target seat is inserted into the positioning hole using the laser tracker. After insertion and inspection without shaking, the laser target ball is placed in the center of the laser target seat. The laser target ball is then 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 coordinate value of the process OTP point is made close to the theoretical value and controlled within ±0.05mm. Use the same steps to adjust the two positioning holes on the angle seat to within ±0.05mm. At this point, the five degrees of freedom of the angle seat are determined and the angle seat is roughly adjusted into place.

5. The device according to claim 4, characterized in that: In step 4, the OTP and OTS adjustment process is as follows: Utilizing the extracted OTS data of the corner seat mounting surface, while ensuring that the coordinate value of the process OTP point does not change, by rotating around the line formed by the two process OTP points on the corner seat, ensure that the connection surface between the corner seat and the pallet meets the theoretical data: 9 measurement points are taken on the connection surface between the corner seat and the pallet, and the laser target ball is placed at the 9 measurement points respectively. By comparing the measured data of the laser tracker with the theoretical data, the deviation direction is analyzed, and the corner seat is rotated around the line formed by the two process OTP points, and the posture is continuously adjusted to ensure that the OTS data is controlled within ±0.05mm. When the data at the 9 measurement points meet the accuracy requirement of ±0.05, the laser target seat is inserted into the positioning hole again. After the insertion is checked for shaking, the laser target ball is placed in the center of the laser target seat. 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 value of the process OTP point meets the accuracy requirement of ±0.05mm at the same time. The 6 degrees of freedom of the corner seat have been fixed and the corner seat has been fine-tuned in place.

6. The device according to claim 5, characterized in that: The process of selecting the 9 measuring points is as follows: select 1 point at each of the 4 corners of the installation surface 20 mm away from the edge, for a total of 4 points; select 1 point at the midpoint of a line connecting every 2 points, and eliminate overlapping points, for a total of 5 points.

7. The device according to claim 6, characterized in that: In step six, the process is as follows: Use the laser tracker to remeasure the OTP hole of the pallet, establish a coordinate system with the tooling reference point on the jig, and insert the laser target holder into the OTP hole of the pallet using the laser tracker according to the OTP coordinate value given in the drawing. After insertion and inspection for shake, place the laser target ball in the center of the laser target holder, then connect the laser target ball to the laser tracker through the light source and monitor the data in real time. When the theoretical value and actual value of the OTP hole coordinate are within ±0.05mm, it meets the standard requirements.

8. The device according to claim 7, characterized in that: In step seven, the process is as follows: In CATIA software, the pallet plane is extracted as OTS data recognizable by the laser tracker and imported into the laser tracker SA application software. 10 to 15 measuring points are selected on the pallet plane according to the "W"-shaped trajectory, with a distance of 100 mm to 200 mm between each point. The laser target ball is placed at 10 to 15 measuring points respectively. By comparing the measured data and theoretical data of the laser tracker, if the flatness deviation is controlled within 0.1 mm, there is no stress deformation on the pallet.

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