An integrated flexible air source pipeline laying method applicable to aircraft cabin doors

Abstract

The present invention belongs to the technical field of aircraft assembly, and particularly relates to an integrated flexible air source pipeline laying method applicable to aircraft cabin doors. Based on the assembly tooling and process layout in the cabin door work area, the tooling is reasonably layout-adjusted according to the actual air pit positions in the workshop. According to the tooling usage efficiency, air pit positions and quantities, and air volume requirements, the number of tooling that can be connected in series is calculated. After optimization and adjustment, the cabin door tooling is divided into overall unit modules; taking each cabin door assembly tooling as the smallest module unit, flexible laying of the air source pipeline is carried out according to the geometric shape and functional characteristics of the tooling structure, realizing the integration of the air source pipeline and the tooling. With the adjustment of future layouts and tooling positions, it can ensure the linkage of the air source and the tooling to achieve the rapid layout of the air source; the external air source joints and flexible hoses of the air source pipeline are used to connect each smallest unit tooling in series to form an overall module to complete the overall laying and layout of the air source pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft assembly, and particularly relates to an integrated flexible air source pipeline laying method applicable to aircraft cabin doors. Background Art

[0002] Due to the product structure and functional characteristics of the aircraft cabin door tooling, the tooling mainly adopts small-scale, diverse and movable tooling. Its characteristics are small tooling size, large quantity, wide process layout distribution, and movable. Since the aviation assembly manufacturing industry mainly uses pneumatic tools, a large number of air hoses are required for air source introduction during on-site operations. The quality of air source transformation has a significant impact on the safety, efficiency, and economy of on-site production.

[0003] The process layout at the site of a certain type of cabin door work package. This type of cabin door work package consists of a boarding door, a service door, a cargo door, and an emergency door. The number of main toolings is 19, and the overall layout range is 6774mm * 1685mm. A large number of air hoses are required during on-site operations. The air hoses are directly connected from the air pit, with a long connection length and scattered randomly on the ground, blocking the on-site logistics passage and posing a risk to production safety. At the same time, the frequent long-span walking of operators affects production efficiency and increases manufacturing costs.

[0004] Currently, in each aircraft assembly manufacturing industry, there are many mature cases for the air source transformation of tooling, but the layout transformation plans are only limited to the air source transformation in the form of hard connection of large-scale fixed tooling, mainly laying air source pipelines on fixed rigid frames. This method affects the logistics passage and the loading and unloading of products when applied to a large number of diverse small-scale toolings, and at the same time restricts their mobility. For the characteristics of the mobility and multi-tool integrated linkage of aircraft cabin door tooling, the existing air source transformation pipeline laying layout plans cannot meet the production characteristics requirements of cabin doors. Therefore, how to design and apply an integrated flexible air source pipeline laying layout applicable to a type of cabin door tooling has become an urgent technical problem to be solved. Summary of the Invention

[0005] To solve the above problems, the present invention provides an integrated flexible air source pipeline laying method applicable to aircraft cabin doors.

[0006] The design principle of the present invention is as follows:

[0007] (1) Based on the assembly tooling and process layout of the cabin door work area, make a reasonable layout adjustment of the tooling according to the actual air pit position in the factory building. Calculate the number of toolings that can be connected in series according to the tooling usage efficiency, air pit position and quantity, and air volume demand. After optimization and adjustment, make an overall unit module division of the cabin door tooling.

[0008] (2)Taking each hatch assembly tooling as the smallest module unit, the flexible laying of the air source pipeline is carried out according to the geometric shape and functional characteristics of the tooling structure, realizing the integration of the air source pipeline and the tooling. With the adjustment of the future layout and the position of the tooling, it can ensure the linkage of the air source and the tooling to achieve the rapid layout of the air source.

[0009] (3)The external air source joint and flexible hose of the air source pipeline are used to connect each smallest unit tooling in series to form an overall module to complete the overall laying and layout of the air source pipeline.

[0010] The technical solution of the present invention is as follows:

[0011] An integrated flexible air source pipeline laying method applicable to aircraft hatches, including:

[0012] a. Overall layout:

[0013] There are 19 main toolings in the hatch work area. According to the actual position and quantity of the air pits on site, the main toolings are divided into five module units; among them, Module 1 connects 2 front boarding doors, 2 rear boarding doors, and 1 cargo hatch, a total of 5 main toolings in series; Module 2 connects 1 front boarding door efficiency tooling, 1 rear boarding door efficiency tooling, and 1 cargo hatch main tooling in series; Module 3 connects 2 front service doors, 2 rear service doors, and 1 cargo hatch, a total of 5 main toolings in series; Module 4 connects 1 front service door efficiency tooling and 1 rear service door efficiency tooling in series; Module 5 connects 1 cargo hatch efficiency tooling, 1 emergency door main tooling, and 2 emergency door efficiency toolings in series. Each module is arranged through an integrated flexible air source pipeline, and the air source is led out from the air pit for air source linkage within the module unit, and a closed-loop layout of air source transmission is formed.

[0014] b. Integrated flexible air source pipeline laying of the smallest unit:

[0015] Taking each distributed tooling in each module as the smallest design unit, according to the different structural shapes and functional characteristics of the tooling, the air source pipeline is integrally laid with the tooling as the carrier, and a U-shaped linkage structure of the air source pipeline is formed; special-shaped elbows are used to change the laying angle of the air duct according to the actual structural shape of the tooling to complete the air duct butt joint and achieve flexible laying; the air source joints at the top and middle of the U-shaped linkage structure are used to realize the air source series connection between toolings and the connection of the air hoses of pneumatic tools during on-site operation by workers.

[0016] c. Series connection form of unit modules:

[0017] The unit modules are independent of each other, and the U-shaped toolings within each unit are connected in series through air source joints and air source hoses to realize the air source linkage within the unit; the air source joint and the air source connection can achieve 360° arbitrary angle rotation in a plane, so arbitrary angle series connection in the plane according to the actual on-site layout can be realized.

[0018] d. Connection form of the air source pipeline inside the tooling:

[0019] The air source pipeline inside the tooling adopts air source hard pipes, and the connection between pipelines is completed by using pipe-to-pipe joints; first, use hydraulic equipment to perform flange pressing on the air source hard pipes, so that two annular flanges are formed at the splicing part of the two air source hard pipes to be spliced with the pipe-to-pipe joint. Insert the two air source hard pipes into both ends of the pipe-to-pipe joint respectively, fasten them through connecting fasteners, and add a sealing ring between the two annular flanges to achieve sealing.

[0020] The present invention has the following beneficial effects and advantages compared with the prior art:

[0021] 1. The present invention can be applied to various types of miniaturized and movable toolings at the same time, with a conformal integrated layout, which can meet the rapid docking of the air source pipeline after the process layout is adjusted without removing the original pipeline. Other similar air source pipeline laying schemes are only applicable to the hard connection of fixed toolings. When the process layout changes, the original air source pipeline cannot be used continuously and needs to be re-laid.

[0022] 2. The present invention adopts an integrated modular design. For different types of miniaturized and movable toolings, only by adjusting the laying of the air source pipeline according to the geometric shape of the tooling can the use be satisfied, and it has a wide range of applications;

[0023] 3. The structure of the present invention is simple, the manufacturing cost is low, and ordinary processing equipment can complete the pipeline docking and laying layout;

[0024] 4. The air source linkage of the present invention is converted and docked through air source joints, and the type, quantity and position of the joints can be adjusted according to the actual situation, so as to meet the process layout adjustment and the change of the number of operators, greatly reducing the use cost and improving the practicability and convenience.

[0025] 5. The diameter of the air source pipeline of the present invention is calculated and optimally designed according to the air volume requirement. It is light in weight on the basis of meeting the strength, and can ensure the air volume requirement when operators work simultaneously under the full load state. The scheme design is ingenious.

[0026] 6. The air source pipeline layout of the cabin door tooling of each model in the domestic existing civil aviation assembly manufacturing industry adopts a fixed hard connection layout design. Therefore, this practical invention is the first in the industry and has no replaceability.

[0027] 7. A set of integrated flexible air source pipeline laying layout of the present invention can be applied to a large number of movable miniaturized toolings, which not only meets the air use requirements of pneumatic tools, but also can follow the tooling. After the process layout is adjusted, there is no need to re-lay the air source pipeline, and the connection and use of the air source can be quickly realized. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of module division in the work area of a certain type of cabin door;

[0029] Figures 2(a) to 2(c) are respectively the front view, left view and bottom view of the U-shaped structure for laying the efficiency tooling of the front boarding door;

[0030] Figures 3(a) and 3(b) are respectively the front view and top view of the air source joint;

[0031] Figures 4(a) and 4(b) are respectively the front view and top view of the air source joint;

[0032] Figure 5(a) is a schematic diagram of the series connection of the tooling of Module 3, Figure 5(b) is the A-A view of Figure 5(a), and Figure 5(c) is the B-B view of Figure 5(a);

[0033] Figure 6(a) is a schematic diagram of the flange crimping of the air source rigid pipe; Figure 6(b) is a schematic diagram of the splicing of the air source rigid pipe by the pipe-to-pipe joint.

[0034] In the figure: 1 air source joint a; 2 crimping part of the special-shaped elbow; 3 air source joint b; 4 bottom of the cabin door tooling; 5 horizontal air source hose between toolings; 6 vertical air source hose between toolings; 7 annular flange; 8 pipe-to-pipe joint; 9 sealing ring; 10 connecting fastener; 11 air source rigid pipe. Specific implementation manners

[0035] The following further describes the specific implementation manners of the present invention in conjunction with the accompanying drawings and technical solutions.

[0036] An integrated flexible air source pipeline laying method applicable to aircraft cabin doors according to the present invention includes the following aspects:

[0037] a. Overall layout:

[0038] As Figure 1 shown, there are 19 main toolings in the work area of a certain type of cabin door. According to the actual position and quantity of the air pits on site, the main toolings are divided into five module units.

[0039] Among them, Module 1 is connected in series with a total of 5 main toolings including 2 front boarding doors, 2 rear boarding doors, and 1 cargo door; Module 3 is connected in series with a total of 5 main toolings including 2 front service doors, 2 rear service doors, and 1 cargo door; Module 2 is connected in series with 1 front boarding door efficiency tooling, 1 rear boarding door efficiency tooling, and 1 cargo door main tooling; Module 4 is connected in series with 1 front service door efficiency tooling and 1 rear service door efficiency tooling; Module 5 is connected in series with 1 cargo door efficiency tooling, 1 emergency door main tooling, and 2 emergency door efficiency toolings. Each module conducts air source linkage within the module unit by means of an integrated air source pipeline layout, leading out the air source from the air pit, and forms a closed-loop layout for air source transmission. The arrow direction is the air source transmission direction within each module.

[0040] b. Integrated flexible pipeline laying with the smallest unit:

[0041] In each module, each distributed tooling is used as the smallest design unit. According to the different structural shapes and functional characteristics of the tooling, the air source pipeline is integrally laid with the tooling as the carrier, and a U-shaped linkage structure of the air source pipeline is formed. Special-shaped elbows are used to change the laying angle of the air duct according to the actual structural shape of the tooling to complete the butt joint of the air duct and achieve flexible laying.

[0042] The U-shaped structure can conveniently achieve the orderly series connection of each tooling; the integrated and integrated laying can meet the requirement of the tooling being movable; the flexible laying of the air source pipeline can achieve obstacle avoidance during the use of the tooling, so as to ensure the normal operation of the operator and prevent the operation from being blocked due to bumps and lack of space; the pneumatic joints at the top and middle of the U-shaped structure are used to achieve the air source series connection between each tooling and the connection of the pneumatic tool air belt during the on-site operation of workers.

[0043] Taking the front boarding door efficiency tooling as an example for illustration, as shown in Figures 2(a) to 2(c). Among them, the air source joint a1 is connected in series through the flexible hose between the toolings to achieve the air source linkage between the toolings, and the air source joint b3 is connected to the operator's pneumatic tool through an air belt to provide power for the pneumatic tool. The structure of the air source joint is shown in Figures 3(a) and 3(b). The pressing part 2 of the special-shaped elbow can achieve the conforming bridging of two air source hard pipes through the special-shaped elbow, and the structure of the special-shaped elbow is shown in Figures 4(a) and 4(b). The bottom 4 of the cabin door tooling is mainly composed of gears and linkage devices, and the lifting and flipping of the tooling can be achieved through the gears and linkage devices. Therefore, this position is extremely important for the tooling. The air source pipeline laying of this scheme fully considers meeting the actual obstacle avoidance requirements of the tooling. Reasonably arranging the air source at the bottom with a reasonable base height can better protect the device, and at the same time, it can prevent trampling during the operation process, achieving safety and aesthetics.

[0044] c. Series connection form of unit modules:

[0045] The unit modules are independent of each other, and the series connection of the U-shaped toolings within each unit is completed through the air source joints and air source hoses to achieve the air source linkage within the unit. Since the connection between the air source joint and the air source can achieve 360° arbitrary angle rotation in a plane, arbitrary angle series connection within the plane according to the actual on-site layout can be achieved.

[0046] Taking Module 3 shown in Figures 5(a) to 5(c) as an example, the air source linkage between the hatch toolings can be achieved by bridging the air source hoses 5 in the horizontal direction between the toolings and the air source hoses 6 in the vertical direction between the toolings with the air source connectors on each tooling. Since the connecting hoses can rotate arbitrarily along the axis direction of the air source pipeline, the bridging between the toolings at any angle can be realized to achieve the air source linkage.

[0047] d. Connection form of the air source pipeline inside the tooling:

[0048] Since the overall laying of the air source pipeline needs to be flexibly shaped according to the specific actual tooling, and the work convenience of the actual operator, the influence on the tooling functionality and the production safety need to be considered centrally, the air source pipeline inside the tooling uses air source rigid pipes. Therefore, a large number of pipe-to-pipe connectors 8 are required for the connection method between the pipelines. A special hydraulic device is used to perform flange pressing on the air source rigid pipe 11, so that two annular flanges 7 are formed at the splicing part of the two spliced pipes (as shown in Figure 6(a)). When the air source rigid pipes 11 are butted, a sealing ring 9 is installed in the interval between the two flanges (as shown in Figure 6(b)) to realize the sealing of the connection of the air source rigid pipes, which is the key to ensuring the air volume. The two air source rigid pipes 11 and the pipe-to-pipe connector 8 are fastened through the connecting fasteners 10 to complete the overall splicing.

Claims

1. An integrated flexible air source pipeline laying method applicable to aircraft cabin doors, characterized in that, it includes: a. Overall layout: There are 19 main toolings in the cabin door work area. According to the actual position and quantity of the air pits on site, the main toolings are divided into five module units; among them, Module 1 is connected in series with 2 front boarding doors, 2 rear boarding doors, and 1 cargo door, a total of 5 main toolings; Module 2 is connected in series with 1 front boarding door efficiency tooling, 1 rear boarding door efficiency tooling, and 1 cargo door main tooling; Module 3 is connected in series with 2 front service doors, 2 rear service doors, and 1 cargo door, a total of 5 main toolings; Module 4 is connected in series with 1 front service door efficiency tooling and 1 rear service door efficiency tooling; Module 5 is connected in series with 1 cargo door efficiency tooling, 1 emergency door main tooling, and 2 emergency door efficiency toolings; Each module is arranged with an integrated flexible air source pipeline, the air source is led out from the air pit and the air source is linked within the module unit, and a closed-loop layout of air source transmission is formed; b. Integrated flexible air source pipeline laying of the minimum unit: In each module, each distributed tooling is used as the minimum design unit. According to the different structural shapes and functional characteristics of the toolings, the air source pipeline is integrally laid with the tooling as the carrier, and a U-shaped linkage structure of the air source pipeline is formed; Use special-shaped elbows to change the laying angle of the air duct according to the actual structural shape of the tooling to complete the butt joint of the air duct and achieve flexible laying; The air source joints at the top and middle of the U-shaped linkage structure are used to realize the air source series connection between toolings and the connection of the air hoses of pneumatic tools during on-site operation by workers; c. Series connection form of unit modules: The unit modules are independent of each other, and the U-shaped toolings within their respective units are connected in series through air source joints and air source hoses to realize the air source linkage within the unit; The air source joint and the air source connection can achieve 360° arbitrary angle rotation in a plane, so arbitrary angle series connection within the plane according to the actual on-site layout can be realized; d. Connection form of the air source pipeline inside the tooling: The air source pipeline inside the tooling uses air source hard pipes, and the connection method between pipelines is completed by using pipe-to-pipe joints; First, use hydraulic equipment to perform flange pressing on the air source hard pipes, so that two annular flanges are formed at the splicing position of the pipe-to-pipe joint for the two air source hard pipes to be spliced. Insert the two air source hard pipes into both ends of the pipe-to-pipe joint respectively, fasten them with connecting fasteners, and add a sealing ring between the two annular flanges to achieve sealing.

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