Aircraft hanging box section pneumatic overturning tool and efficient assembling method

Abstract

The invention provides a pneumatic overturning tool and an efficient assembly method for an airplane hanging box section, and belongs to the technical field of airplane assembly.The pneumatic overturning tool comprises a bottom supporting frame, a pneumatic rotation device and a box frame, the pneumatic rotation device and the box frame are installed on the bottom supporting frame, and the box frame is connected with an output shaft of the pneumatic rotation device through a clamp; a positioner assembly, a top drill plate and a bottom drill plate are installed on the box body frame and used for positioning and fixing all assemblies of the hanging box section and drilling holes, and after drilling, assembling is completed through a pneumatic overturning tool. The assembly efficiency is improved, the assembly precision is guaranteed, the labor intensity and the safety risk are reduced, the production flexibility and adaptability are improved, and the product quality and consistency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft assembly, and relates to a pneumatic turning tool for an aircraft hanging box segment and an efficient assembly method. Background Art

[0002] With the rapid development of the aviation industry, aircraft assembly technology is also constantly improving. Modern aircraft, especially large aircraft, have complex structures and numerous components, which require extremely high assembly accuracy and efficiency. In order to meet market demand and improve the quality and efficiency of aircraft manufacturing, aircraft assembly technology is gradually developing from manual assembly and semi-automatic assembly to fully automated assembly. The aircraft pylon section is a key component that connects the aircraft engine and the wing or fuselage, such as Figure 3 As shown, the suspension box segment 15 is assembled by the bottom wall plate assembly 16, the second frame assembly 17, the first frame assembly 18, the lower joint assembly 19, the fifth frame assembly 20, the third frame assembly 21, the sixth frame assembly 22, the L-shaped cover plate assembly 23 and the upper wall plate assembly 24, wherein the end where the first frame assembly 18 is located is the wide end, the end where the lower joint assembly 19 is located is the narrow end, the lower surface of the middle part of the bottom wall plate assembly 16 is an inclined surface, and the lower surfaces at both ends are flat surfaces. The assembly quality and efficiency of the aircraft suspension box segment directly affect the overall performance and manufacturing cycle of the aircraft. The assembly process involves flipping operations. The traditional flipping method consumes a lot of physical strength and time for large and heavy aircraft parts, such as suspension box segments, wings, etc., resulting in low assembly efficiency. Moreover, during the flipping process, due to the weight and volume of the parts, the operator may face the risk of injury. In addition, the existing suspension box segment assembly tooling is designed with one or more sets of positioners for each component, resulting in a complex tooling structure and low assembly efficiency. Summary of the invention

[0003] Based on the development trend of aircraft assembly technology, the importance of aircraft suspension box segment assembly, and the challenges faced by aircraft suspension box segment assembly, the present invention provides an aircraft suspension box segment pneumatic flip tooling and an efficient assembly method, and by combining the automation, high precision, and strong adaptability of the pneumatic flip tooling, a new solution is provided for the efficient assembly of aircraft suspension box segments. While improving assembly efficiency, ensuring assembly accuracy, and reducing labor intensity and safety risks, the present invention has significant advantages such as strong adaptability and improved overall assembly level, which makes the present invention have broad application prospects and promotion value in the field of aircraft manufacturing.

[0004] The specific technical solutions of the present invention are as follows:

[0005] The invention discloses a pneumatic turning tool for an aircraft hanging box section, which comprises a pneumatic rotating device, a clamp, a bottom supporting frame, a box frame, a positioner assembly, a top drilling template and a bottom drilling template.

[0006] The bottom support frame is the supporting frame structure of the entire pneumatic turning tooling; the box frame is a cage structure, and inclined beams are fixed between the two columns at one end and the middle of the two bottom cross beams. A rotating shaft is provided at the center of the two end surfaces of the box frame and is mounted on the bottom support frame so that the box frame can be turned freely.

[0007] The pneumatic rotary device is installed on the bottom support frame, and its power output shaft is connected to the rotating shaft at one end of the box frame through a clamp, so as to control the turning of the box frame.

[0008] The positioner assembly includes a 1-frame assembly positioner, a lower joint assembly positioner, a 5-frame assembly positioner, a 3-frame assembly positioner, a bottom support rod, an L-shaped cover assembly positioner, an upper wall assembly positioner and an upper wall assembly end face positioner.

[0009] The 1-frame component positioner includes two symmetrical clamping positioners fixed at the connection between two columns and the inclined beam at one end of the box frame, and used for connecting and fixing with the ear holes on both sides of the 1-frame component.

[0010] The upper wall panel assembly end face locator includes two left and right positioning plates fixedly connected by a connecting plate, which are arranged next to a frame assembly locator and fixedly connected between two columns on the box frame. Limit pins are arranged on the two positioning plates for positioning the wide end face of the upper wall panel assembly.

[0011] The 3-frame assembly positioner comprises two clamping positioners fixedly connected by a connecting plate, the bottoms of the two clamping positioners are detachably fixed on two oblique beams of the box frame, and the positioning profile of the 3-frame assembly positioner is set according to the shape of the 3-frame assembly to position and fix the 3-frame assembly.

[0012] The lower joint assembly locator is fixed between two bottom cross beams at one end of the box frame away from the frame assembly locator, and a clamping locator is arranged on the top thereof for connecting and fixing with the ear hole of the lower joint assembly.

[0013] The 5-frame component positioner is set according to the structure and installation posture of the 5-frame component. It is located between the lower joint component positioner and the 1-frame component positioner, close to the side of the lower joint component positioner, and fixedly installed on the box frame. A positioning hole is set on the upper part of the 5-frame component positioner, which is used to connect and fix with the ear hole at the upper end of the 5-frame component. Two left and right inclined plates are set at the lower part. The inclination angles of the two inclined plates are determined according to the installation position of the 5-frame component to realize the positioning of the lower end of the 5-frame component at the connection position with the vertical ribs of the bottom wall plate component.

[0014] The L-shaped cover plate assembly positioner includes a drilling template and positioning supports fixed on the four corners of the drilling template. The four positioning supports are fixed on the box frame so that the drilling template and the L-shaped cover plate assembly have the same angle. The drilling template is provided with positioning pins, fasteners and drilling template bushings to achieve the positioning, fixing and hole making of the L-shaped cover plate assembly.

[0015] The upper wall panel assembly positioner includes two groups of clamping positioners at the wide end and the narrow end, with four in each group, which are symmetrically fixed on the two top beams of the box frame in pairs, wherein the narrow end clamping positioner is fixed near the 5-frame assembly positioner, and the wide end clamping positioner is fixed at one end close to the 1-frame assembly positioner, and is used to position the upper wall panel assembly, wherein the four clamping positioners in the middle are detachably fixedly connected to the box frame.

[0016] There are two bottom support rods, the bottoms of which are fixed at the two ends of the bottom of the box frame respectively, and the tops of which are used to support the lower surfaces of the non-inclined sections at both ends of the bottom wall panel assembly to ensure its rigidity. The support height of the bottom support rod is adjustable to adapt to the manufacturing deviation of the hanging box section.

[0017] The top drilling template has two sections, which are respectively fixed on two groups of clamping positioners of the upper wall panel assembly positioner, and are used to press the upper wall panel assembly and make holes.

[0018] The overall upper surface shape of the bottom drilling template is consistent with the bottom surface shape of the assembled bottom wall plate assembly and the lower joint assembly. It is divided into four sections, which are fixed between the two bottom beams of the box frame through connecting supports. The four sections correspond to the inclined surface in the middle of the bottom wall plate assembly, the planes at both ends and the lower surface of the lower joint assembly, respectively, reducing weight while avoiding the bottom support rod.

[0019] Furthermore, a plurality of target holes are arranged at the four corners of the box frame as laser projection references for tooling calibration.

[0020] An efficient assembly method for an aircraft pylon box segment is implemented based on the above-mentioned aircraft pylon box segment pneumatic flip tooling, and the efficient assembly method for an aircraft pylon box segment comprises the following steps:

[0021] Step 1, making the assembly holes where frame assembly No. 2 and frame assembly No. 6 are assembled with the bottom wall plate assembly into final holes.

[0022] Step 2: Assemble the bottom wall panel assembly and frame assembly No. 2.

[0023] Step 3, remove the 4 clamping locators in the middle of the 3-frame component locators, the top drilling template and the upper wall panel component locators on the pneumatic flip tooling; place the bottom wall panel assembly of the assembled frame assembly No. 2 on the bottom drilling template; install the 1-frame assembly through the 1-frame component locator, fit the bottom wall panel assembly with the bottom surface of the 1-frame assembly and align the end surfaces to achieve positioning, then achieve positioning connection through the assembly holes of the two, and adjust the bottom support rod to fit with the lower surface of the bottom wall panel assembly to achieve support.

[0024] Step 4, connect the ear hole of the lower joint assembly with the lower joint assembly locator, match the depression on the other end face of the lower joint assembly with the end face of the bottom wall plate assembly to achieve positioning, and position and connect the lower joint assembly locator, the bottom drilling template and the bottom wall plate assembly through the pin shaft; connect the ear hole at the upper end of the 5-frame assembly with the 5-frame assembly locator and place it on the two inclined plates of the 5-frame assembly locator. At this time, the lower end of the 5-frame assembly is placed on the bottom wall plate assembly, and the two are positioned and connected through the pin shaft; install the 3-frame assembly locator on the box frame, and connect the 3-frame assembly to the bottom wall plate assembly after positioning it through the 3-frame assembly locator.

[0025] Step 5, assemble and connect the 6-frame assembly to the bottom wall assembly according to the assembly holes drilled in step 1; position and press the L-shaped cover assembly through the L-shaped cover assembly locator; fit the upper wall assembly with the upper surface of the 1-frame assembly and the ear end face of the 5-frame assembly, and position the end face of the wide end through the limit pin on the upper wall assembly end face locator, and position and connect the upper wall assembly to the 1-frame assembly and the 5-frame assembly; install the 4 uninstalled clamping locators in the upper wall assembly locator on the box frame, install the top drilling template on the upper wall assembly locator, and position and press the upper wall assembly.

[0026] Step 6: Measure the gaps between the components of the suspension box section, install gaskets to fill the gaps, trim the gasket edges, and record the gasket thickness.

[0027] Step 7: Check the positioning quality and hole position accuracy of the hanging box segment.

[0028] Step 8, start the pneumatic rotating device to flip the hanging box section to the desired position.

[0029] Step 9, use the top drilling template, bottom drilling template and L-shaped cover assembly locator to drill the fastener holes to the final holes by using a one-drill-one-reamer method, remove the components of the hanging box section from the pneumatic flip tooling, complete the deburring process, and then use the pneumatic flip tooling to position and assemble the components to the final hanging box section product and then remove it from the shelf.

[0030] The beneficial effects of the present invention are: the present invention has significant beneficial effects in improving assembly efficiency, ensuring assembly accuracy, reducing labor intensity and safety risks, improving production flexibility and adaptability, promoting automation and intelligent development, and improving product quality and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an overall diagram of the pneumatic flipping tooling for the aircraft hanging box section.

[0032] Figure 2 For the locator component Figure 1 .

[0033] Figure 3 This is a diagram of the hanging box section.

[0034] Figure 4 For the locator component Figure 2 .

[0035] Figure 5 This is a diagram showing the assembly of the positioner assembly and the suspension box segment.

[0036] In the figure: 1-pneumatic rotary device; 2-clamp; 3-bottom support frame; 4-box frame; 5-locator assembly; 6-top drilling template; 7-bottom drilling template; 8-1 frame assembly locator; 9-lower joint assembly locator; 10-5 frame assembly locator; 11-3 frame assembly locator; 12-bottom support rod; 13-L-type cover assembly locator; 14-upper wall assembly locator; 15-hanging box section; 16-bottom wall assembly; 17-No. 2 frame assembly; 18-1 frame assembly; 19-lower joint assembly; 20-5 frame assembly; 21-3 frame assembly; 22-6 frame assembly; 23-L-type cover assembly; 24-upper wall assembly. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments improved or adjusted by ordinary technicians in this field based on the embodiments of the present invention belong to the protection scope of the present invention.

[0038] The present embodiment provides a pneumatic turning tool for an aircraft hanging box segment, the pneumatic turning tool comprising a pneumatic rotating device 1, a clamp 2, a bottom support frame 3, a box frame 4, a positioner assembly 5, a top drilling template 6 and a bottom drilling template 7, as shown in FIG. Figure 1 shown.

[0039] The bottom support frame 3 is the support frame structure of the entire pneumatic turning tooling; the box frame 4 is a cage structure, and inclined beams are fixed between the two columns at one end and the middle of the two bottom beams. A rotating shaft is set at the center of the two end surfaces of the box frame 4, and the frame is mounted on the bottom support frame 3 so that the box frame 4 can be turned freely; a number of target holes are set at the four corners of the box frame 4 as a laser projection reference for tooling calibration.

[0040] The pneumatic rotary device 1 is installed on the bottom support frame 3, and its power output shaft is connected to the rotating shaft at one end of the box frame 4 through the clamp 2, so as to control the turning of the box frame 4.

[0041] The positioner assembly 5 includes a 1-frame assembly positioner 8, a lower joint assembly positioner 9, a 5-frame assembly positioner 10, a 3-frame assembly positioner 11, a bottom support rod 12, an L-shaped cover assembly positioner 13, an upper wall assembly positioner 14 and an upper wall assembly end face positioner, such as Figure 2 and Figure 4 shown.

[0042] The 1 frame assembly positioner 8 includes two symmetrical clamping positioners, which are respectively fixed at the connection between the two columns and the inclined beam at one end of the box frame 4, and are used to connect and fix with the ear holes on both sides of the 1 frame assembly 18 through a 30mm diameter round shaft.

[0043] The upper wall panel assembly end face locator includes two left and right positioning plates fixedly connected by a connecting plate, which are arranged next to a frame assembly locator 8 and fixedly connected between two columns on the box frame 4. Limit pins are arranged on the two positioning plates for positioning the wide end face of the upper wall panel assembly 24.

[0044] The 3-frame assembly positioner 11 includes two clamping positioners fixedly connected by a connecting plate, the bottoms of the two clamping positioners are detachably fixed on the two oblique beams of the box frame 4, and the positioning surface of the 3-frame assembly positioner 11 is set according to the shape of the 3-frame assembly 21 to position and fix the 3-frame assembly 21.

[0045] The lower joint assembly locator 9 is fixed between the two bottom beams at one end of the box frame 4 away from the frame assembly locator 8, and a clamping locator is arranged on the top thereof for connecting and fixing with the ear hole of the lower joint assembly 19 through a 48mm diameter round shaft.

[0046] The 5-frame component positioner 10 is set according to the structure and installation posture of the 5-frame component 20. It is located between the lower joint component positioner 9 and the 1-frame component positioner 8, close to the side of the lower joint component positioner 9, and is fixedly installed on the box frame 4. A positioning hole is set on the upper part of the 5-frame component positioner 10, which is used to connect and fix with the ear hole at the upper end of the 5-frame component 20 through a 48mm diameter round shaft. Two left and right inclined plates are set at the lower part. The inclination angles of the two inclined plates are determined according to the installation position of the 5-frame component 20, so as to realize the positioning of the lower end of the 5-frame component 20 at the connection position with the vertical ribs of the bottom wall plate component 16.

[0047] The L-shaped cover assembly positioner 13 includes a drilling template and positioning supports fixed on the four corners of the drilling template. The four positioning supports are fixed on the box frame 4 so that the drilling template is at the same angle as the L-shaped cover assembly 23. The drilling template is provided with positioning pins, fasteners and drilling template bushings to achieve the positioning, fixing and hole making of the L-shaped cover assembly 23.

[0048] The upper wall panel assembly positioner 14 includes two groups of clamping positioners at the wide end and the narrow end, four in each group, which are symmetrically fixed on the two top beams of the box frame 4, wherein the narrow end clamping positioner is fixed near the 5-frame assembly positioner 10, and the wide end clamping positioner is fixed at one end close to the 1-frame assembly positioner 8, for positioning the upper wall panel assembly 24, wherein the four clamping positioners in the middle are detachably fixedly connected to the box frame 4.

[0049] There are two bottom support rods 12, the bottoms of which are fixed at the two ends of the bottom of the box frame 4 respectively, and the tops of which are used to support the lower surfaces of the non-inclined sections at both ends of the bottom wall panel assembly 16 to ensure its rigidity. The support height of the bottom support rod 12 is adjustable to adapt to the manufacturing deviation of the hanging box section 15.

[0050] The top drilling template 6 has two sections, which are respectively fixed on two groups of clamping positioners of the upper wall panel assembly positioner 14, and are used to press the upper wall panel assembly 24 and make holes.

[0051] The bottom drilling template 7 is fixed between the two bottom beams of the box frame 4 through a connecting support. Its overall upper surface shape is consistent with the bottom surface shape of the assembled bottom wall panel assembly 16 and the lower joint assembly 19. Its width is wider than the bottom wall panel assembly 16. The edge distance between the two is 10 mm to ensure that there is no interference with the connecting support. It is divided into four sections, which correspond to the inclined surface in the middle of the bottom wall panel assembly 16, the planes at both ends and the lower surface of the lower joint assembly 19. The bottom drilling template 7 is hollowed out to reduce weight while avoiding the bottom support rod 12.

[0052] This embodiment also provides an efficient assembly method for an aircraft pylon box segment, which is implemented based on the above-mentioned aircraft pylon box segment pneumatic flipping tooling. The efficient assembly method for an aircraft pylon box segment includes the following steps:

[0053] Step 1, make the assembly holes for assembling the No. 2 frame assembly 17 and the No. 6 frame assembly 22 with the bottom wall plate assembly 16 into final holes; confirm the exact positions of the assembly holes to ensure that these positions are consistent with the assembly drawings or design requirements.

[0054] Step 2, assemble the bottom wall plate assembly 16 and the No. 2 frame assembly 17.

[0055] Step 3, remove the 4 clamping locators located in the middle of the 3-frame component locator 11, the top drilling template 6 and the upper wall panel component locator 14 on the pneumatic flip tooling; place the bottom wall panel assembly 16 with the assembled No. 2 frame assembly 17 on the bottom drilling template 7; install the 1-frame assembly 18 through the 1-frame component locator 8, fit the bottom surface of the bottom wall panel assembly 16 with the 1-frame assembly 18 and align the end surfaces to achieve positioning, then achieve positioning connection through the assembly holes of the two, and adjust the bottom support rod 12 to fit with the lower surface of the bottom wall panel assembly 16 to achieve support.

[0056] Step 4, connect the ear hole of the lower joint component 19 with the lower joint component locator 9, match the depression on the other end face of the lower joint component 19 with the end face of the bottom wall plate component 16 to achieve positioning, and position the lower joint component locator 9, the bottom drilling template 7 and the bottom wall plate component 16 through the pin shaft. Connect the ear hole of the upper end of the 5-frame component 20 with the 5-frame component locator 10 and place it on the two inclined plates of the 5-frame component locator 10. At this time, the lower end of the 5-frame component 20 is placed on the bottom wall plate component 16, and the two are positioned and connected by the pin shaft; install the 3-frame component locator 11 on the box frame 4, and connect the 3-frame component 21 to the bottom wall plate component 16 after positioning it through the 3-frame component locator 11.

[0057] Step 5, assemble and connect the 6-frame component 22 with the bottom wall plate component 16 according to the assembly holes drilled in step 1; position and press the L-shaped cover plate component 23 through the L-shaped cover plate component positioner 13; fit the upper wall plate component 24 with the upper surface of the 1-frame component 18 and the end face of the ear of the 5-frame component 20, and position the end face of the wide end through the limit pin on the upper wall plate component end face positioner, and position and connect the upper wall plate component 24 with the 1-frame component 18 and the 5-frame component 20; install the 4 uninstalled clamping positioners in the upper wall plate component positioner 14 on the box frame 4, install the top drilling template 6 on the upper wall plate component positioner 14, and position and press the upper wall plate component 24, as shown in FIG. Figure 5 shown.

[0058] Step 6, use a feeler gauge to measure the gap between the components of the hanging box section 15, install gaskets to fill the gaps, trim the edges of the gaskets, ensure that the outer dimensions of the gaskets are greater than or equal to 2 times the diameter of the connected fasteners + 1mm, and record the thickness of the gaskets.

[0059] Step 7, check the positioning quality and hole position accuracy of the hanging box segment 15. After completing all inspections and records, make a final confirmation of the positioning quality and hole position accuracy of the hanging box segment 15 to ensure that all inspection items meet the requirements and there are no omissions or unresolved issues.

[0060] Step 8, check that the pneumatic rotary device 1 starts normally, ensure that the pneumatic rotary device 1 is in good working condition, all connecting parts are securely fastened, and there is no leakage or damage; confirm that the pneumatic flip tooling is firmly installed to ensure that it will not loosen or fall off during the flipping process; open the air source valve according to the operating procedures of the pneumatic rotary device 1 to ensure that the air pressure is stable and meets the equipment requirements; start the pneumatic rotary device 1, pay attention to the operation of the pneumatic flip tooling to ensure that there is no abnormal sound or vibration; operate the pneumatic rotary device 1 to flip the hanging box section 15 and stop it at the desired position.

[0061] Step 9, use standard equipment to automatically feed the drill through the top drilling template 6, the bottom drilling template 7 and the L-shaped cover assembly locator 13, and use a one-drill-one-reamer method to drill the fastener holes to the final holes, remove the components of the hanging box section 15 from the pneumatic flip tooling, complete the deburring process, and then use the pneumatic flip tooling to position and assemble the components to the final hanging box section 15 product before removing it from the shelf.

[0062] The above-described embodiments merely express the implementation methods of the present invention, but they should not be understood as limiting the scope of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A pneumatic turning tool for an aircraft hanging box section, characterized in that: The pneumatic flip tool comprises a pneumatic rotating device (1), a bottom support frame (3), a box frame (4), a positioner assembly (5), a top drilling template (6) and a bottom drilling template (7); the box frame (4) is provided with rotating shafts at both ends, which are mounted on the bottom support frame (3); the rotating shaft at one end is connected to the pneumatic rotating device (1) to realize flipping; the positioner assembly (5) and the bottom drilling template (7) are fixed on the box frame (4); the top drilling template (6) is fixed on the positioner assembly (5); the three are arranged according to the position structure of each component in the hanging box segment (15) and are used to realize hole making and assembly of the hanging box segment (15).

2. The aircraft pylon section pneumatic turning tool according to claim 1, characterized in that: A plurality of target holes are arranged at the four corners of the box frame (4) as laser projection references for tooling calibration.

3. The aircraft pylon section pneumatic turning tool according to claim 1, characterized in that: The power output shaft of the pneumatic rotary device (1) is connected to the rotating shaft at one end of the box frame (4) via a clamp (2).

4. The aircraft pylon section pneumatic turning tool according to claim 1, characterized in that: The positioner assembly (5) comprises a 1-frame assembly positioner (8), a lower joint assembly positioner (9), a 5-frame assembly positioner (10), a 3-frame assembly positioner (11), an L-shaped cover assembly positioner (13) and an upper wall assembly positioner (14); The 1-frame component positioner (8) comprises two symmetrical clamping positioners fixed to one end of the box frame (4) and used to be connected and fixed to the ear holes on both sides of the 1-frame component (18); The three-frame assembly positioner (11) comprises two clamping positioners fixedly connected by a connecting plate, the bottoms of the two clamping positioners are detachably fixed on the box frame (4), and the positioning profile of the three-frame assembly positioner (11) is set according to the shape of the three-frame assembly (21) to position and fix the three-frame assembly (21); The lower joint assembly locator (9) is fixed to the other end of the box frame (4), and a clamping locator is provided on the top thereof for connecting with the ear hole of the lower joint assembly (19); The 5-frame assembly positioner (10) is arranged according to the structure and installation posture of the 5-frame assembly (20), and is located between the lower joint assembly positioner (9) and the 1-frame assembly positioner (8) and close to the lower joint assembly positioner (9), and is fixedly installed on the box frame (4). A positioning hole is arranged on the upper part of the 5-frame assembly positioner (10) for connecting and fixing with the ear hole at the upper end of the 5-frame assembly (20), and two left and right inclined plates are arranged on the lower part. The inclination angles of the two inclined plates are determined according to the installation position of the 5-frame assembly (20), so as to realize that the lower end of the 5-frame assembly (20) is positioned at the connection position with the vertical rib of the bottom wall plate assembly (16); The L-shaped cover assembly positioner (13) comprises a drilling template and a positioning support having an angle consistent with that of the L-shaped cover assembly (23); the positioning support is fixed to the box frame (4) and is used to realize positioning, fixing and hole making of the L-shaped cover assembly (23); The upper wall panel assembly positioner (14) comprises two groups of clamping positioners at the wide end and the narrow end, each group having four, which are symmetrically fixed on two top cross beams of the box frame (4), wherein the narrow end clamping positioner is fixed near the 5 frame assembly positioner (10), and the wide end clamping positioner is fixed at one end close to the 1 frame assembly positioner (8), and is used to position the upper wall panel assembly (24), wherein the four clamping positioners located in the middle are detachably fixedly connected to the box frame (4); The top drilling template (6) has two sections, which are respectively fixed on two sets of clamping positioners of the upper wall panel assembly positioner (14) and are used to press the upper wall panel assembly (24) and make holes; The overall upper surface shape of the bottom drilling template (7) is consistent with the bottom surface shape of the assembled bottom wall plate assembly (16) and the lower joint assembly (19). It is divided into four sections, which are respectively fixed on the box frame (4), three of which correspond to the lower surface of the bottom wall plate assembly (16) and the other corresponds to the lower surface of the lower joint assembly (19).

5. The aircraft pylon section pneumatic turning tool according to claim 4, characterized in that: The positioner assembly (5) further comprises an upper wall panel assembly end face positioner, which is provided with two left and right positioning plates, fixed beside a frame assembly positioner (8), and limit pins are provided on the two positioning plates for positioning the end face of the upper wall panel assembly (24).

6. The aircraft pylon section pneumatic turning tool according to claim 4, characterized in that: The positioner assembly (5) further comprises two bottom support rods (12), the bottoms of which are respectively fixed at two ends of the bottom of the box frame (4), and the tops of which are used to support the lower surface of the bottom wall plate assembly (16); the bottom drilling template (7) is hollowed out to avoid the bottom support rods (12).

7. The aircraft pylon section pneumatic turning tool according to claim 6, characterized in that: The support height of the bottom support rod (12) is adjustable to accommodate the manufacturing deviation of the hanging box section (15).

8. An efficient assembly method for an aircraft pylon box segment, implemented based on the aircraft pylon box segment pneumatic flipping tooling according to any one of claims 1 to 7, characterized in that: The efficient assembly method of the aircraft suspension box segment comprises the following steps: Step 1, making the assembly holes for assembling the No. 2 frame assembly (17) and the No. 6 frame assembly (22) with the bottom wall plate assembly (16) into final holes; Step 2, assemble the bottom wall plate assembly (16) and the No. 2 frame assembly (17) under the rack; Step 3, remove the four clamping positioners located in the middle of the three frame assembly positioners (11), the top drilling template (6) and the upper wall plate assembly positioner (14) on the pneumatic flip tooling; place the bottom wall plate assembly (16) assembled with the No. 2 frame assembly (17) on the bottom drilling template (7); install the 1 frame assembly (18) through the 1 frame assembly positioner (8), fit the bottom surface of the bottom wall plate assembly (16) with the 1 frame assembly (18) and align the end surfaces to achieve positioning, and then achieve positioning connection through the assembly holes of the two; Step 4, connect the ear hole of the lower joint component (19) with the lower joint component locator (9), match the depression on the other end surface of the lower joint component (19) with the end surface of the bottom wall plate component (16) to achieve positioning, and position and connect the lower joint component locator (9), the bottom drilling template (7) and the bottom wall plate component (16); connect the ear hole of the upper end of the 5-frame component (20) with the 5-frame component locator (10) and place it on the two inclined plates of the 5-frame component locator (10), and place the lower end of the 5-frame component (20) on the bottom wall plate component (16) to position and connect the two; install the 3-frame component locator (11) on the box frame (4), and connect the 3-frame component (21) to the bottom wall plate component (16) after positioning it through the 3-frame component locator (11); Step 5, assemble and connect the 6-frame assembly (22) with the bottom wall assembly (16) according to the assembly holes drilled in step 1; position and press the L-shaped cover assembly (23) through the L-shaped cover assembly positioner (13); fit the upper wall assembly (24) with the upper surface of the 1-frame assembly (18) and the end surface of the ear piece of the 5-frame assembly (20), and position and connect the upper wall assembly (24) with the 1-frame assembly (18) and the 5-frame assembly (20); install the 4 clamping positioners that are not installed in the upper wall assembly positioner (14) on the box frame (4), install the top drilling template (6) on the upper wall assembly positioner (14), and position and press the upper wall assembly (24); Step 6, measuring the gaps between the components of the hanging box section (15), installing gaskets to fill the gaps, trimming the gasket edges, and recording the gasket thickness; Step 7, check the positioning quality and hole position accuracy of the hanging box segment (15); Step 8, starting the pneumatic rotating device (1) to flip the hanging box section (15) to a desired position; Step 9, through the top drilling template (6), the bottom drilling template (7) and the L-shaped cover plate assembly positioner (13), the fastener hole is drilled to the final hole by a one-drill-one-reamer method, and the components of the hanging box section (15) are removed from the pneumatic flip tooling. After the deburring process is completed, the components are positioned and assembled to the final hanging box section (15) product on the pneumatic flip tooling and then removed from the shelf.

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