Aircraft panel butt joint positioning detection method

Abstract

This invention belongs to the field of process equipment design and manufacturing technology, and relates to a method for detecting the positioning of aircraft panel docking. Specifically, it concerns the detection of all stringer positions after the aircraft panel docking assembly is completed, specifically for detecting the positions of the stringers and skin at the docking points. This solves the problem of the lack of dedicated inspection methods for the positioning of stringers, pads, etc., at the docking points after panel docking. This method does not affect the use of the assembly jig or the assembly progress during detection. The detection device is simple in design, low in manufacturing cost, and occupies a small area.

Description

Technical Field

[0001] This invention belongs to the field of process equipment design and manufacturing technology, and relates to a method for detecting the docking and positioning of aircraft panels. Background Technology

[0002] During the panel assembly process, a jig is needed to position components such as stringers, skins, and compensating plates. However, there is a lack of dedicated inspection methods for the positioning of stringers and pads at the joint after panel assembly. Currently, the assembly jig for panel assembly serves as both a positioning and inspection device. This structure makes it difficult to efficiently inspect the installation position of the stringers and the overlap position of the skins at the joint when the panels are removed from the jig. Summary of the Invention

[0003] Purpose of the invention

[0004] This invention provides a detection method and apparatus for detecting the positions of the stringers and skin at the docking locations after the assembly and docking of aircraft panels. Specifically, it relates to an apparatus and method for detecting all stringer positions and skin docking locations after the assembly and docking of aircraft panels.

[0005] Technical solution

[0006] A method for detecting the docking and positioning of aircraft panels includes the following steps:

[0007] Step 1: First, determine the inspection accuracy and inspection area for the parts to be inspected. Measure the assembly model of the wall panels in the area to be inspected. Both mating wall panels need to be simultaneously loaded into the assembly model to determine the installation positions of the two positioning devices.

[0008] Step 2: In the product model of CATIA software, select the location of the positioning device, design a plane to cut the product model, determine the shape of the positioning position, set a starting detection position on the positioning device, design a plane at the starting detection position, cut the product model, and determine the shape of the butt joint of the wall panels after mating. According to the predetermined positioning surface distance, determine the positions of the remaining detection devices, design planes, cut the product model, and determine the shape of the butt joint of each detection position after mating.

[0009] Step 3: Project the stringer axis position and skin mating position onto the plane designed for each testing device. Mark each testing position using the lines formed by the plane-cutting digital model of the projection positioning device, projecting the lines formed by the plane-cutting digital model of each testing device and the stringer and skin mating positions projected onto each testing device. Process the corresponding lines in CAD software.

[0010] Step 4: Use a laser cutting machine to cut the graphic formed by the projection plane of the positioning device and the detection device to obtain the physical object of the detection device;

[0011] Step 5: Install the positioning device on the docked wall panel, install the detection device according to the marking lines on the positioning device, and check the conformity between the docked wall panel and the detection device.

[0012] Furthermore, the process includes step 6. If the mating wall plate and the detection device have good compatibility in step 6, it proves that the positioning accuracy of the mating wall plate meets the detection requirements; otherwise, the mating accuracy of the wall plate does not meet the requirements.

[0013] Furthermore, the greater the shape change of the assembly at the docking position, the higher the required inspection accuracy, the denser the inspection devices are set up, and the larger the inspection area, the more inspection devices are required.

[0014] Furthermore, for ease of installation, the plane of the positioning device can be determined by borrowing the surface of the stringer or the surface of the parts installed inside the wall panel.

[0015] Furthermore, the starting detection position in step 2 is specifically: a position 50mm inside the edge of the assembly area to be detected.

[0016] Furthermore, marking each detection position specifically involves processing the lines in CAD software to obtain the markings for the detection positions.

[0017] Furthermore, in step 4, both the positioning device and the detection device are made of 2mm steel plate.

[0018] Furthermore, to improve detection accuracy, the density of the detection device design can be appropriately increased or the number of marks on each detection device can be increased.

[0019] Furthermore, the positional relationship between the testing device and the assembly to be tested should be determined based on the specific shape of the assembly to be tested.

[0020] The beneficial effects of this application are as follows:

[0021] This invention provides a simple and efficient method for inspecting the assembly accuracy of mating panels, filling a gap in the field of mating panel assembly accuracy inspection. The inspection process does not interfere with the use of the assembly jig or the assembly schedule. The inspection device is simple in design, low in manufacturing cost, and occupies a small area. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the positioning device;

[0023] Figure 2 This is a schematic diagram of the detection device;

[0024] Figure 3 This is a schematic diagram of the mating surfaces of the wall panels;

[0025] Figure 4The obtained curve is a schematic diagram of the detection device designed for the working surface. Detailed Implementation

[0026] The present invention will be further described below with reference to embodiments. The following description represents only a portion of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] First, determine the inspection accuracy and inspection area for the parts to be inspected. Typically, two positioning devices parallel to the aircraft's spandrel and N inspection devices perpendicular to the spandrel are needed, with the distance between the inspection device stands generally 100mm. The greater the shape variation of the assembly at the docking position, the higher the required inspection accuracy, the denser the inspection devices need to be, and the larger the inspection area, the more inspection devices are required.

[0028] To measure the panel assembly model of the area to be inspected, both mating panels need to be loaded into the assembly model simultaneously. The installation positions of the two positioning devices must be determined. For ease of installation, the positioning devices can generally utilize the plane on the stringer or the plane of other parts installed within the panel. In the CATIA software product model, the location of the positioning device is selected. The product model is then designed with a plane to cut the plane, determining the shape of the positioning position. A starting inspection position is set on the positioning device. A plane is designed at the starting inspection position, and the product model is cut to determine the shape of the mating joint after panel assembly. Based on the predetermined positioning surface distance, the positions of the remaining inspection devices are determined. A plane is designed, the product model is cut, and the shape of the mating joint after each inspection position is determined. The stringer axis position and the skin mating position are projected onto the plane designed for each inspection device.

[0029] The projection positioning device cuts lines from the planar digital model, processes these lines in CAD software, and marks each detection position. It also projects the lines formed by the planar cutting digital model of each detection device, along with the positions of the stringers and skin mating points projected onto them, and processes the corresponding lines in CAD software.

[0030] The actual object of the detection device is obtained by cutting the projection plane of the positioning device and the detection device using a laser cutting machine. Figure 1 , Figure 2 Both the positioning device and the detection device are made of 2mm steel plate.

[0031] On the docked wall panels, install a positioning device. According to the markings on the positioning device, install a detection device to check the conformity between the docked wall panels and the detection device. If the conformity between the docked wall panels and the detection device is good, it proves that the positioning accuracy of the docked wall panels meets the detection requirements; otherwise, the docking accuracy of the wall panels does not meet the requirements.

[0032] First, determine the inspection accuracy and inspection area for the parts to be inspected. Using the outermost long stringer axis at both ends of the panel to be inspected as the reference, select the vertical side of this stringer, perpendicular to the machine body shape, as the design plane for the positioning device. In CATIA software, intersecting this plane with the product digital model yields two curves. Projecting this plane, as shown... Figure 2 The CAD file is obtained, and the positioning device is designed using the curve as the working edge. Simultaneously, station surfaces are designed on the positioning device at 100mm intervals. In CATIA software, the selected positioning surface is used to design a plane that intersects with the wall panel, resulting in a curve. This positioning plane is projected, and the resulting curve is used as the working surface to design the detection device. Figure 4 .

[0033] The CAD format files of the designed positioning and detection devices are processed, and steel plates are cut using a laser cutting machine to obtain the positioning and detection devices.

[0034] According to the position selected in the digital model, install the positioning device on the completed wall panel. According to the marking lines on the positioning device, install the detection device and check the conformity between the wall panel and the detection device. If the conformity between the wall panel and the detection device is good, it proves that the positioning accuracy of the wall panel meets the detection requirements; otherwise, the wall panel docking accuracy does not meet the requirements.

[0035] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting the docking and positioning of aircraft panels, characterized in that, Includes the following steps: Step 1: First, determine the inspection accuracy and inspection area for the parts to be inspected; measure the assembly model of the wall panels in the area to be inspected, and simultaneously load the two mating wall panels into the assembly model to determine the installation positions of the two positioning devices. Step 2: In the product model of CATIA software, select the location of the positioning device, design the plane to cut the product model, determine the shape of the positioning position, set a starting detection position on the positioning device, design a plane at the starting detection position, cut the product model, and determine the shape of the wall panel joint after docking; according to the predetermined positioning surface distance, determine the position of the remaining detection device, design the plane, cut the product model, and determine the shape of the joint after docking at each detection position. Step 3: Project the position of the stringer axis and the skin mating position on the plane designed for each testing device; The projection positioning device uses the lines formed by the planar cutting of the product digital model to mark each inspection position; it also projects the lines formed by the planar cutting of the product digital model of each inspection device, the position of the stringer and the skin docking position on each inspection device, and processes the corresponding lines in CAD software. Step 4: Use a laser cutting machine to cut the graphic formed by the projection plane of the positioning device and the detection device to obtain the physical object of the detection device; Step 5: Install the positioning device on the docked wall panel, install the detection device according to the marking lines on the positioning device, and check the conformity between the docked wall panel and the detection device.

2. The method as described in claim 1, characterized in that, The process also includes step 6, in which if the mating wall plate and the detection device have good compatibility, it proves that the positioning accuracy of the mating wall plate meets the detection requirements; otherwise, the mating accuracy of the wall plate does not meet the requirements.

3. The method as described in claim 2, characterized in that, The greater the shape change of the assembly at the docking position, the higher the required inspection accuracy, the denser the inspection devices, and the larger the inspection area, the more inspection devices are required.

4. The method as described in claim 3, characterized in that, For ease of installation, the plane of the positioning device can be determined by using the surface of the stringer or the surface of the parts installed inside the wall panel.

5. The method as described in claim 4, characterized in that, The starting detection position in step 2 is specifically 50mm inside the edge of the area of ​​the assembly to be detected.

6. The method as described in claim 5, characterized in that, The specific method for marking each detection position is as follows: the lines are processed in CAD software to obtain the markings for the detection positions.

7. The method as described in claim 6, characterized in that, In step 4, both the positioning device and the detection device are made of 2mm steel plate.

8. The method as described in claim 7, characterized in that, To improve detection accuracy, increase the density of the detection device design or increase the number of marks on each detection device.

9. The method as described in claim 8, characterized in that, The positional relationship between the testing device and the assembly to be tested should be determined based on the specific shape of the assembly to be tested.

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