Welding flexible tool for buffer type skid landing gear arch beam

Abstract

The utility model relates to work piece welding flexible tool technical field especially, a kind of welding flexible tool for buffer formula skid landing gear bow beam, comprising: welding frame;Several position adjusting components, along the length direction and width direction of welding frame symmetry setting;First welding positioning component, for the positioning welding of the slide pipe connecting piece of the bow beam one end setting;Second welding positioning component, for the positioning welding of the bumper welding lug setting on the bow beam;Third welding positioning component, for clamping bow beam, third welding positioning component is vertically set on position adjusting component;Fourth welding positioning component, for the positioning welding of the fuselage connecting section of the bow beam other end setting.The utility model not only can accurately position welding to bow beam different parts, but also can well adapt to the bow beam welding demand of different sizes and shapes, improve the versatility and flexibility of tool, help to guarantee welding accuracy, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flexible tooling technology for workpiece welding, and in particular to a flexible welding tooling for a landing gear bow beam with a buffer-type skid. Background Technology

[0002] In the manufacturing of skid landing gear, skid landing gear with shock absorbers is widely used in various aircraft due to its superior shock absorption performance. Its core structure includes four left and right arched beams, as well as key components such as slide tubes, shock absorbers, and fuselage assemblies connected to these beams. The assembly precision of these components directly affects the final performance of the landing gear. In particular, the four symmetrical arched beams must maintain a strictly symmetrical distribution and accurate welding with the slide tubes, shock absorbers, and fuselage connections to ensure precise alignment of the skid landing gear during final assembly.

[0003] Compared to traditional unbuffered skid landing gear, the buffered structure adds a key component, making the welding process more complex. The welding fixtures for traditional unbuffered skid landing gear can only meet the positioning needs of simple structures and cannot meet the high-precision requirements of welding multiple components together in the buffered structure. Furthermore, they lack specialized positioning and adjustment functions for the connection interfaces between the buffer and the bow beam, fuselage, and skid tube.

[0004] The existing welding fixtures have at least the following problems: 1. They cannot adjust the platform size and welding position according to the size differences of different landing gear models, making it difficult to be compatible with the production of products of multiple specifications.

[0005] 2. The lack of flexible positioning design for components such as the bow beam, buffer, and fuselage connection interface makes it impossible to eliminate dimensional errors before welding, which can easily lead to deviations in the position of components after welding and affect assembly accuracy. Utility Model Content

[0006] To address at least one of the aforementioned technical problems, this utility model proposes a flexible welding fixture for the bow-shaped beam of a skid landing gear with a buffer, in order to solve the problem that existing welding fixtures cannot meet the welding requirements and positioning accuracy requirements of bow-shaped beams of different sizes.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A flexible welding fixture for a landing gear bow beam with a buffer-type skid includes: Welding frame; Several position adjustment components are symmetrically arranged along the length and width directions of the welding frame; The first welding positioning component is used for positioning and welding of the sliding tube connector at one end of the bow beam. The first welding positioning component is vertically arranged on the position adjustment component. The position adjustment component is symmetrically arranged on both sides of the welding frame along the length direction. The relative position of the first welding positioning component on the welding frame is adjusted by the position adjustment component. The second welding positioning component is used for positioning and welding the buffer welding lugs set on the bow beam. The second welding positioning component is vertically set on the position adjustment component, and the position adjustment component is symmetrically set on both sides of the welding frame along its length. The relative position of the second welding positioning component on the welding frame is adjusted by the position adjustment component. The third welding positioning component is used to clamp the bow-shaped beam. The third welding positioning component is vertically disposed on the position adjustment component, and the position adjustment component is symmetrically disposed on both sides of the welding frame along its length. The relative position of the third welding positioning component on the welding frame is adjusted by the position adjustment component. The fourth welding positioning component is used for positioning welding of the fuselage connecting section at the other end of the bow beam. The fourth welding positioning component is vertically arranged on the position adjustment component, and the position adjustment component is symmetrically arranged in the width direction of the welding frame. The relative position of the fourth welding positioning component on the welding frame is adjusted by the position adjustment component. The first welding positioning component, the second welding positioning component, and the third welding positioning component are arranged sequentially along the length of the welding frame, and the fourth welding positioning component is adjacent to the third welding positioning component.

[0008] Preferably, the position adjustment component includes: The first adjusting plate is movable in the length and width directions of the welding frame; The second adjusting plate is movably disposed above the first adjusting plate, and the moving direction of the second adjusting plate is perpendicular to the moving direction of the first adjusting plate.

[0009] Preferably, the first adjusting plate is provided with a first adjusting elongated hole along its moving direction, the top surface of the welding frame is provided with a first adjusting circular hole corresponding to the first adjusting elongated hole, the first adjusting plate is provided with a plurality of second adjusting circular holes parallel and symmetrical in a direction perpendicular to the first adjusting elongated hole, and the second adjusting plate is provided with a second adjusting elongated hole corresponding to the second adjusting circular hole.

[0010] Preferably, the first welding positioning assembly includes: The first step rod includes a first round rod that is vertically fixed to the first adjusting plate and a second round rod that is coaxially disposed on the upper part of the first round rod, wherein the diameter of the first round rod is larger than the diameter of the second round rod; The first rod sleeve is movably sleeved on the second round rod. A positioning part is provided on the outside of the first rod sleeve in a direction perpendicular to the central axis of the first rod sleeve. The sliding tube connector is limited and fixed on the outside of the first rod sleeve by the positioning part. The inner diameter of the first rod sleeve is smaller than the outer diameter of the first round rod and equal to the outer diameter of the second round rod. A first height adjustment component is disposed between the first rod sleeve and the first round rod, and is used to adjust the relative height of the slide tube connector; The first round rod, the first rod sleeve, and the positioning part are respectively provided with interconnected air inlets for continuously introducing welding protective gas into the bow beam. The end of the second round rod away from the first round rod is provided with external thread and is fixed by a nut.

[0011] Preferably, the second welding positioning component is a second stepped rod, which includes a third round rod vertically fixed to the first adjusting plate and a fourth round rod coaxially disposed on the upper part of the third round rod. The buffer welding lug is engaged with the outside of the fourth round rod, and the end of the fourth round rod away from the third round rod is provided with an external thread and fixed by a matching nut.

[0012] Preferably, the third welding positioning assembly includes: The mounting part is vertically fixed to the first adjusting plate; A clamping mechanism for clamping and fixing the bow-shaped beam; A height adjustment mechanism is rotatably disposed between the mounting part and the clamping mechanism, and the distance between the mounting part and the clamping mechanism is adjusted by rotating the height adjustment mechanism.

[0013] Preferably, the clamping mechanism includes a first clamping block rotatably connected to the height adjustment mechanism and a second clamping block detachably fixed to the first clamping block, wherein the first clamping block and the second clamping block have a positioning cavity for clamping the bow beam.

[0014] Preferably, the height adjustment mechanism includes: An adjusting screw is provided at both ends with external threads in different helical directions. The lower part of the first clamping block and the upper part of the mounting part are respectively provided with internal thread holes that are adapted to the external threads at both ends of the adjusting screw. A rotating block is sleeved and fixed in the middle of the adjusting screw, and is used to rotate the adjusting screw; A locking nut is used to restrict the relative rotation between the adjusting screw and the first clamping block and the mounting part. The locking nut is rotatably sleeved on the external threads at both ends of the adjusting screw.

[0015] Preferably, the fourth welding positioning assembly includes: The second step rod includes a fifth round rod fixed perpendicularly to the first adjusting plate and a sixth round rod fixed coaxially to the upper part of the fifth round rod. The diameter of the fifth round rod is larger than the diameter of the sixth round rod. The body connecting section is movably sleeved on the sixth round rod. The inner walls of both ends of the body connecting section are in contact with the sixth round rod. A gap is formed between the middle section of the body connecting section and the sixth round rod to form an exhaust chamber. The middle section of the body connecting section is provided with a through hole communicating with the bow-shaped beam. An exhaust channel is provided in the middle of the sixth round rod, and the air inlet of the exhaust channel is located in the exhaust chamber. The second height adjustment component is disposed between the fuselage connecting section and the fifth round rod, and is used to adjust the height of the fuselage connecting section; A sealing element is fitted over the sixth round rod and located at the upper part of the body connecting section; Fasteners are fitted and fixed to the outside of the sixth round rod and located on the upper part of the seal.

[0016] Preferably, the welding frame includes a plurality of leg assemblies for providing support and a frame assembly disposed on the upper part of the leg assemblies, the frame assembly being used to mount the position adjustment assembly; The outrigger assembly includes a support rod, a fixing plate at the lower part of the support rod with fixing holes, a connecting plate at the upper part of the support rod with connecting holes, and reinforcing ribs between the fixing plate and the support rod, as well as between the connecting plate and the support rod. The frame assembly includes a longitudinal beam for mounting the first welding positioning assembly, the second welding positioning assembly, and the third welding positioning assembly, and a transverse beam perpendicularly connected to the longitudinal beam for mounting the fourth welding positioning assembly. The first adjusting circular hole is provided on the top surface of the longitudinal beam and the cross beam. The end faces and side faces of both ends of the longitudinal beam and the cross beam are provided with first mounting holes. The first mounting holes are used for vertical connection between the longitudinal beam and the cross beam and / or connection between adjacent longitudinal beams and / or connection between adjacent cross beams. The bottom surfaces of both ends of the longitudinal beam and the cross beam are provided with second mounting holes corresponding to the connecting holes. The second mounting holes are used for connection between the connecting plate and the longitudinal beam and the cross beam.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention, by setting a position adjustment component and multiple welding positioning components on the welding frame, and adjusting the relative positions of the multiple welding positioning components through the position adjustment component, can not only accurately position and weld different parts of the bow beam (such as the sliding tube connector, the buffer welding lug, the machine body connecting section, etc.), but also adapt well to the welding needs of bow beams of different sizes and shapes, improve the versatility and flexibility of the tooling, help ensure welding accuracy, improve welding quality, reduce welding deformation, and improve production efficiency. Attached Figure Description

[0018] Figure 1 A three-dimensional view of a flexible welding fixture for a landing gear bow beam with a buffer-type skid; Figure 2 A top view of a flexible welding fixture for a sliding skid landing gear bow beam with a buffer; Figure 3 A side view of a welded flexible tooling for a skid landing gear bow beam with a buffer; Figure 4 This is a schematic diagram of the support leg assembly in this utility model; Figure 5 This is a schematic diagram of the connecting plate structure in this utility model; Figure 6 This is a perspective view of the longitudinal beam (crossbeam) in this utility model; Figure 7 This is a side view of the longitudinal beam (crossbeam) in this utility model; Figure 8 This is a schematic diagram of the structure of the first welding assembly in this utility model; Figure 9 This is a top view of the first welding assembly in this utility model; Figure 10 for Figure 8 Sectional view along line AA; Figure 11 This is a structural diagram of the second welding positioning component in this utility model; Figure 12 This is a top view of the second welding positioning component in this utility model; Figure 13 for Figure 11 Sectional view along the BB direction; Figure 14 This is a perspective view of the third welding positioning component in this utility model; Figure 15 This is a top view of the third welding positioning component in this utility model; Figure 16 This is a side view of the fourth welding positioning component in this utility model; Figure 17 This is a top view of the fourth welding positioning component in this utility model; Figure 18 for Figure 17 Sectional view along the CC direction.

[0019] In the diagram: 10. Welding frame; 101. Leg assembly; 1011. Support rod; 1012. Fixing plate; 10121. Fixing hole; 1013. Connecting plate; 10131. Connecting hole; 1014. Reinforcing rib; 102. Frame assembly; 1021. Longitudinal beam; 1022. Crossbeam; 1023. First adjusting hole; 1024. First mounting hole; 1025. Second mounting hole; 20. Position adjustment assembly; 201. First adjustment plate; 2011. First adjustment elongated hole; 2012. Second adjustment circular hole; 202. Second adjustment plate; 2021. Second adjustment elongated hole; 30. First welding positioning assembly; 301. First stepped rod; 3011. First round rod; 3012. Second round rod; 302. First rod sleeve; 3021. Positioning part; 303. First height adjustment component; 304. Air inlet; 40. Second welding positioning assembly; 401. Third round rod; 402. Fourth round rod; 50. Third welding positioning assembly; 501. Mounting part; 502. Clamping mechanism; 5021. First clamping block; 5022. Second clamping block; 5023. Positioning cavity; 503. Height adjustment mechanism; 5031. Adjusting screw; 5032. Rotating block; 5033. Locking nut; 60. Fourth welding positioning component; 601. Fifth round rod; 602. Sixth round rod; 6021. Exhaust channel; 603. Exhaust chamber; 604. Second height adjustment component; 605. Seal; 606. Fastener; 70. Bow-shaped beam; 701. Slide tube connector; 702. Buffer welding lug; 703. Fuselage connecting section. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this utility model, and not all of the embodiments in this utility model.

[0021] Please refer to Figures 1-18 As shown, a flexible welding fixture for a landing gear bow beam 70 with a buffer skid includes: Welding frame 10; Several position adjustment components 20 are symmetrically arranged along the length and width directions of the welding frame 10; The first welding positioning component 30 is used for positioning welding of the sliding tube connector 701 at one end of the bow beam 70. The first welding positioning component 30 is vertically arranged on the position adjustment component 20. The position adjustment component 20 is symmetrically arranged on both sides of the welding frame 10 in the length direction. The relative position of the first welding positioning component 30 on the welding frame 10 is adjusted by the position adjustment component 20. The second welding positioning component 40 is used for positioning welding of the buffer welding lug 702 set on the bow beam 70. The second welding positioning component 40 is vertically set on the position adjustment component 20, and the position adjustment component 20 is symmetrically set on both sides of the welding frame 10 in the length direction. The relative position of the second welding positioning component 40 on the welding frame 10 is adjusted by the position adjustment component 20. The third welding positioning component 50 is used to clamp the bow beam 70. The third welding positioning component 50 is vertically arranged on the position adjustment component 20, which is symmetrically arranged on both sides of the welding frame 10 along its length. The relative position of the third welding positioning component 50 on the welding frame 10 is adjusted by the position adjustment component 20. The fourth welding positioning component 60 is used for positioning welding of the fuselage connecting section 703 at the other end of the bow beam 70. The fourth welding positioning component 60 is vertically arranged on the position adjustment component 20, which is symmetrically arranged in the width direction of the welding frame 10. The relative position of the fourth welding positioning component 60 on the welding frame 10 is adjusted by the position adjustment component 20. The first welding positioning component 30, the second welding positioning component 40 and the third welding positioning component 50 are arranged sequentially along the length of the welding frame 10, and the fourth welding positioning component 60 is adjacent to the third welding positioning component 50.

[0022] This embodiment sets up a position adjustment component 20 and multiple welding positioning components on the welding frame 10. The position adjustment component 20 adjusts the relative positions of the multiple welding positioning components, which not only enables precise positioning welding of different parts of the bow beam 70 (such as the slide tube connector 701, the buffer welding lug 702, the body connecting section 703, etc.), but also can well adapt to the welding needs of bow beams 70 of different sizes and shapes. This improves the versatility and flexibility of the tooling, helps to ensure welding accuracy, improve welding quality, reduce welding deformation, and improve production efficiency.

[0023] It should be noted that the welding frame 10 described above in this embodiment serves to provide a welding platform. In order to facilitate the welding needs of different bow-shaped beams 70, the welding frame 10 in this embodiment adopts a splicing structure.

[0024] Specifically, please refer to Figures 3-7As shown, in this embodiment, the welding frame 10 includes a plurality of leg assemblies 101 for providing support and a frame assembly 102 disposed on the upper part of the leg assemblies 101. The frame assembly 102 is used to install the position adjustment assembly 20.

[0025] The outrigger assembly 101 includes a support rod 1011, a fixing plate 1012 at the lower part of the support rod 1011, a fixing hole 10121 on the fixing plate 1012, a connecting plate 1013 at the upper part of the support rod 1011, a connecting hole 10131 on the connecting plate 1013, and reinforcing ribs 1014 between the fixing plate 1012 and the support rod 1011, and between the connecting plate 1013 and the support rod 1011.

[0026] The frame assembly 102 includes a longitudinal beam 1021 for mounting a first welding positioning assembly 30, a second welding positioning assembly 40, and a third welding positioning assembly 50, and a transverse beam 1022 perpendicularly connected to the longitudinal beam 1021 for mounting a fourth welding positioning assembly 60.

[0027] It should be noted that in this embodiment, there are 4 longitudinal beams 1021 and 2 transverse beams 1022, which together form a rectangular frame. There are 6 support leg assemblies 101, located below the connections between longitudinal beams 1021 and between longitudinal beams 1021 and transverse beams 1022. The longitudinal beams 1021 and transverse beams 1022 are connected together by connecting plates 1013 in the support leg assemblies 101, thus enabling the installation and fixation of the longitudinal beams 1021 and transverse beams 1022.

[0028] To facilitate the connection between the longitudinal beam 1021 and the transverse beam 1022 and each other, specifically, in this embodiment, the top surfaces of the longitudinal beam 1021 and the transverse beam 1022 are provided with first adjustment holes 1023. The position adjustment component 20 is fixed on the longitudinal beam 1021 and the transverse beam 1022 through the first adjustment holes 1023. At the same time, the position adjustment component 20 can also be moved on the longitudinal beam 1021 and the transverse beam 1022 through the first adjustment holes 1023.

[0029] The end faces and sides of both ends of the longitudinal beam 1021 and the transverse beam 1022 are provided with first mounting holes 1024. The first mounting holes 1024 can realize the vertical connection between the longitudinal beam 1021 and the transverse beam 1022 and / or the connection between adjacent longitudinal beams 1021 and / or the connection between adjacent transverse beams 1022.

[0030] The bottom surfaces at both ends of the longitudinal beam 1021 and the transverse beam 1022 are provided with second mounting holes 1025 corresponding to the connecting holes 10131. The connection between the connecting plate 1013 and the longitudinal beam 1021 and the transverse beam 1022 can be realized through the second mounting holes 1025.

[0031] Therefore, the welding frame 10 can be freely assembled through the connecting hole 10131 of the connecting plate 1013, the first mounting hole 1024 and the second mounting hole 1025 of the longitudinal beam 1021 and the transverse beam 1022. This not only facilitates the modular assembly and disassembly of the welding fixture, but also allows for the expansion or adjustment of the welding fixture specifications according to the actual welding requirements, thereby achieving flexible splicing of the welding fixture.

[0032] Please refer to Figure 2 , Figure 9 , Figure 12 , Figure 15 and Figure 17 As shown, the position adjustment component 20 in this embodiment includes: a first adjustment plate 201, which is movably disposed in the length and width directions of the welding frame 10; and a second adjustment plate 202, which is movably disposed above the first adjustment plate 201, and the moving direction of the second adjustment plate 202 is perpendicular to the moving direction of the first adjustment plate 201.

[0033] In order to facilitate the adjustment of the relative positions of the first adjusting plate 201 and the second adjusting plate 202, in this embodiment, the first adjusting plate 201 is provided with a first adjusting elongated hole 2011 along its moving direction, the top surface of the welding frame 10 is provided with a first adjusting circular hole 1023 corresponding to the first adjusting elongated hole 2011, the first adjusting plate 201 is provided with a plurality of second adjusting circular holes 2012 parallel and symmetrically arranged in a direction perpendicular to the first adjusting elongated hole 2011, and the second adjusting plate 202 is provided with a second adjusting elongated hole 2021 corresponding to the second adjusting circular hole 2012.

[0034] In this embodiment, the first adjusting plate 201 set on the longitudinal beam 1021 is a T-shaped plate, wherein the horizontal section of the T-shaped plate is provided with parallel first adjusting elongated holes 2011, and the second adjusting round holes 2012 are set on the vertical section and the extension of the horizontal section of the T-shaped plate; the second adjusting plate 202 is a rectangular plate, wherein the second adjusting elongated holes 2021 are set on both sides in parallel and symmetrical arrangement.

[0035] Considering that the length of the crossbeam 1022 in this embodiment is relatively short, in order to increase the relative adjustment range, the first adjustment plate 201 set on the crossbeam 1022 is a rectangular plate, unlike the first adjustment plate 201 on the longitudinal beam 1021.

[0036] Depending on the actual shape of the bow beam 70, the installation method of the position adjustment component 20 may vary. Specifically, in this embodiment, the vertical sections of the T-shaped plates of the first welding positioning component 30 and the third welding positioning component 50 face inward toward the welding frame 10, while the vertical sections of the T-shaped plates of the second welding positioning component 40 face outward toward the welding frame 10.

[0037] Specifically, the first adjusting plate 201 can be adjusted in the length direction of the longitudinal beam 1021 and / or the transverse beam 1022 by the cooperation of the first adjusting elongated hole 2011 and the first adjusting circular hole 1023. The second adjusting plate 202 can be adjusted in the width direction of the longitudinal beam 1021 and / or the transverse beam 1022 by the second adjusting elongated hole 2021 and the second adjusting circular hole 2012. Thus, the horizontal position adjustment component 20 can be adjusted within a certain range of the longitudinal beam 1021 and the transverse beam 1022.

[0038] It is understandable that, since the first adjusting holes 1023 are symmetrically arranged on the longitudinal beam 1021 and the transverse beam 1022, the relative positions of the two first adjusting plates 201 fixed through the corresponding first adjusting holes 1023 are symmetrical. Consequently, the relative positions of the second adjusting plates 202 fixed through the corresponding second adjusting holes 2012 are also symmetrical. Similarly, to ensure that the positions of the aforementioned welding positioning components on the second adjusting plate 202 are relatively fixed, this embodiment provides positioning holes on the second adjusting plate 202 for easy positioning and installation, thereby making the installation positions of the welding positioning components relatively fixed. Obviously, since the second adjusting plate 202 needs to be in contact with the upper surface of the first adjusting plate 201, the fasteners 606 (e.g., bolts or screws) corresponding to the positioning holes are embedded, meaning that the ends of the fasteners 606 do not protrude from the surface of the second adjusting plate 202.

[0039] Therefore, the relative positions of the corresponding first welding positioning components 30, second welding positioning components 40, third welding positioning components 50 and fourth welding positioning components 60, which are fixed on the longitudinal beam 1021 and the transverse beam 1022 by the above-mentioned fixing method, are fixed and symmetrical, thereby ensuring that the bow beam 70 structure welded by the above-mentioned welding fixture is symmetrical.

[0040] Please refer to Figures 8-10 As shown, the first welding positioning assembly 30 includes: The first step rod 301 includes a first round rod 3011 vertically fixed on the first adjusting plate 201 and a second round rod 3012 coaxially disposed on the upper part of the first round rod 3011. The diameter of the first round rod 3011 is larger than the diameter of the second round rod 3012. The first rod sleeve 302 is movably sleeved on the second round rod 3012. The first rod sleeve 302 has a positioning part 3021 on its outer side perpendicular to the central axis of the first rod sleeve 302. The slide tube connector 701 is limited and fixed to the outside of the first rod sleeve 302 through the positioning part 3021. The inner diameter of the first rod sleeve 302 is smaller than the outer diameter of the first round rod 3011 and equal to the outer diameter of the second round rod 3012. The first height adjustment component 303 is disposed between the first rod sleeve 302 and the first round rod 3011, and is used to adjust the relative height of the slide tube connector 701; The first round rod 3011, the first rod sleeve 302, and the positioning part 3021 are respectively provided with interconnected air inlet holes 304 for continuously introducing welding protective gas into the bow beam 70. The second round rod 3012 is provided with an external thread at the end away from the first round rod 3011 and is fixed by a nut.

[0041] In this example, the positioning part 3021 provided by the first sleeve 302, since the slide tube connector 701 is arc-shaped and the outer diameter of the positioning part 3021 is equal to the inner diameter of the opening of the slide tube connector 701, when the slide tube connector 701 is fitted and locked onto the outside of the second round rod 3012 through the positioning part 3021, the position of the slide tube connector 701 is relatively fixed in the first sleeve 302 under the limiting action of the positioning part 3021. Therefore, by adjusting the relative position of the first adjusting plate 201 and the second adjusting plate 202 and cooperating with the first height adjusting part 303, the relative position adjustment of the first welding positioning assembly 30 within a certain space can be achieved.

[0042] It should be noted that the first height adjustment component 303 in this embodiment should be made of a rigid material, such as stainless steel, to ensure that the relative height of the slide tube connector 701 will not change or will change only slightly (within the error range) under the tightening action of fasteners such as nuts.

[0043] Meanwhile, the nut can work with a rigid sealing gasket. After tightening, the rigid sealing gasket and the first height adjustment component 303 can form a relatively closed space with both ends of the first sleeve 302, which can reduce the leakage of welding shielding gas.

[0044] Please refer to Figures 11-13 As shown, the second welding positioning component 40 is a second stepped rod. The second stepped rod includes a third round rod 401 that is vertically fixed on the first adjusting plate 201 and a fourth round rod 402 that is coaxially arranged on the upper part of the third round rod 401. The buffer welding lug 702 is snapped onto the outside of the fourth round rod 402. The end of the fourth round rod 402 away from the third round rod 401 is provided with an external thread and is fixed by a matching nut.

[0045] In this embodiment, the position adjustment method of the buffer welding lug 702 in the horizontal plane is the same as the above adjustment method, and will not be repeated here.

[0046] It should be noted that in this embodiment, the buffer welding lug 702 includes a lug with a through hole at one end and a welding base that is fitted and fixed to the bow beam 70 at the other end. In this embodiment, the welding base is an arc-shaped plate.

[0047] Please refer to Figure 10 and Figure 13As shown, in order to facilitate the installation and positioning of the first sleeve 302, the buffer welding lug 702 and the fuselage connecting section 703, this embodiment adopts internal positioning in a rhombus-shaped hole. The internal positioning structure in a rhombus-shaped hole is existing technology and will not be described in detail here.

[0048] Please refer to Figure 14 and Figure 15 As shown, the third welding positioning assembly 50 includes: The mounting part 501 is vertically fixed to the first adjusting plate 201; Clamping mechanism 502 is used to clamp and fix the bow-shaped beam 70; The height adjustment mechanism 503 is rotatably disposed between the mounting part 501 and the clamping mechanism 502. Rotating the height adjustment mechanism 503 adjusts the distance between the mounting part 501 and the clamping mechanism.

[0049] It is understandable that, since the height of the second welding positioning component 40 remains unchanged in this embodiment, that is, the height and position of the buffer welding support 702 are fixed, after the clamping mechanism 502 clamps and fixes the bow beam 70, the bow beam 70 and the buffer welding support 702 are made to fit together by the adjustment of the height adjustment mechanism 503 and the position adjustment component 20 (the position adjustment component 20 corresponding to the second welding positioning component 40 and / or the third welding positioning component 50).

[0050] It should be noted that in this embodiment, the mounting part 501 is a cylinder with an internal threaded hole. Obviously, the function of the mounting part 501 is to provide a mounting platform. Therefore, in this embodiment, the mounting part 501 can also adopt other structural forms, which are not limited here.

[0051] Please refer to Figure 14 As shown, the clamping mechanism 502 includes a first clamping block 5021 rotatably connected to the height adjustment mechanism 503 and a second clamping block 5022 detachably fixed to the first clamping block 5021. A positioning cavity 5023 for clamping the bow-shaped beam 70 is provided between the first clamping block 5021 and the second clamping block 5022.

[0052] Specifically, in this embodiment, both the first clamping block 5021 and the second clamping block 5022 are rectangular blocks. The center of each clamping block has an arc-shaped groove, and mounting holes are provided on both sides for detachable fixing via bolts or other fasteners 606. When the first clamping block 5021 and the second clamping block 5022 are closed, the two arc-shaped grooves form a positioning cavity 5023, and the inner wall of the positioning cavity 5023 is at least partially in contact with the arched beam 70.

[0053] Considering the height difference between the two ends of the bow-shaped beam (the two ends are not at the same height during welding), in order to make the interior of the positioning cavity 5023 fit with the bow-shaped beam, there is also a height difference between the two ends of the positioning cavity 5023. That is to say, there is an angle between the central axis of the positioning cavity 5023 and the horizontal plane.

[0054] Please refer to Figure 14 As shown, the height adjustment mechanism 503 includes: The adjusting screw 5031 has external threads with different helical directions at both ends. The lower part of the first clamping block 5021 and the upper part of the mounting part 501 are respectively provided with internal thread holes that are adapted to the external threads at both ends of the adjusting screw 5031. Rotating block 5032 is sleeved and fixed in the middle of adjusting screw 5031 and is used to rotate adjusting screw 5031; The locking nut 5033 is used to limit the relative rotation between the adjusting screw 5031, the first clamping block 5021, and the mounting part 501. The locking nut 5033 is rotatably sleeved on the external threads at both ends of the adjusting screw 5031.

[0055] Understandably, when it is necessary to adjust the distance between the mounting part 501 and the clamping mechanism, the adjusting screw 5031 is rotated by rotating the rotating block 5032. Since the helical directions of the threads at both ends of the adjusting screw 5031 are different, the mounting part 501 and the clamping mechanism move closer or further apart on the adjusting screw 5031. Of course, since the mounting part 501 is fixed, it is actually the clamping mechanism that moves closer or further away from the mounting part 501, thereby changing the relative height of the clamping mechanism.

[0056] When the height is adjusted to the specified position, tightening the locking nut 5033 can prevent relative rotation between the clamping mechanism and the adjusting screw 5031, thus avoiding changes in the relative height of the bow beam 70 and affecting the structural shape of the bow beam 70.

[0057] Please refer to Figures 16-18 As shown, the fourth welding positioning component 60 in this embodiment includes: The second step rod includes a fifth round rod 601 that is perpendicularly fixed to the first adjusting plate 201 and a sixth round rod 602 that is coaxially fixed to the upper part of the fifth round rod 601. The diameter of the fifth round rod 601 is larger than the diameter of the sixth round rod 602. The fuselage connecting section 703 is movably sleeved on the sixth round rod 602. The inner walls of both ends of the fuselage connecting section 703 are in contact with the sixth round rod 602. There is a gap between the middle section of the fuselage connecting section 703 and the sixth round rod 602 to form an exhaust chamber 603. The middle section of the fuselage connecting section 703 is provided with a through hole that communicates with the bow beam 70. The middle part of the sixth round rod 602 is provided with an exhaust channel 6021. The air inlet of the exhaust channel 6021 is located inside the exhaust chamber 603. The second height adjustment component 604 is disposed between the body connecting section 703 and the fifth round rod 601, and is used to adjust the height of the body connecting section 703; the sealing component 605 is sleeved on the outside of the sixth round rod 602 and located on the upper part of the body connecting section 703; the fastener 606 is sleeved and fixed on the outside of the sixth round rod 602 and located on the upper part of the sealing component 605.

[0058] It is understood that the position of the fuselage connecting section 703 can be adjusted by adjusting the first adjusting plate 201 and / or the second adjusting plate 202 and / or the second height adjusting piece 604, so that one end of the bow-shaped beam can be aligned and welded with the fuselage connecting section 703.

[0059] It should be noted that the welding shielding gas enters the bow-shaped beam from the inlet of the first welding positioning component 30 and then exits from the outlet of the fourth welding positioning component 60. During the welding process, the welding shielding gas can effectively prevent the internal metal of the bow-shaped beam 70 from oxidizing during welding, improve the welding quality, and ensure the strength and stability of the welded part of the bow-shaped beam 70.

[0060] The working process of the flexible welding fixture in this invention is as follows: Assemble a suitable welding frame 10 according to the dimensions of the bow beam 70, and symmetrically install the first welding positioning component 30, the second welding positioning component 40, the third welding positioning component 50 and the fourth welding positioning component 60 on the welding frame 10.

[0061] The bow-shaped beam 70 is clamped and fixed by the clamping mechanism in the third welding positioning assembly 50. The corresponding position adjustment assemblies 20 (first adjustment plate 201 and / or second adjustment plate 202) of each welding positioning assembly are symmetrically adjusted so that the two ends of the bow-shaped beam 70 correspond to the positions of the slide tube connector 701 and the machine body connecting section 703, and the buffer welding lugs 702 are aligned with the corresponding positions of the bow-shaped beam 70. Welding shielding gas is introduced, allowing it to flow within the bow-shaped beam 70 until welding is completed.

[0062] The above description is a specific implementation of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A flexible welding fixture for a landing gear arched beam with a buffer-type skid, characterized in that, include: Welding frame (10); Several position adjustment components (20) are symmetrically arranged along the length and width directions of the welding frame (10); The first welding positioning component (30) is used for positioning welding of the sliding tube connector (701) at one end of the bow beam (70). The first welding positioning component (30) is vertically arranged on the position adjustment component (20). The position adjustment component (20) is symmetrically arranged on both sides of the welding frame (10) in the length direction. The relative position of the first welding positioning component (30) on the welding frame (10) is adjusted by the position adjustment component (20). The second welding positioning component (40) is used for positioning welding of the buffer welding lug (702) set on the bow beam (70). The second welding positioning component (40) is vertically set on the position adjustment component (20), and the position adjustment component (20) is symmetrically set on both sides of the welding frame (10) in the length direction. The relative position of the second welding positioning component (40) on the welding frame (10) is adjusted by the position adjustment component (20). The third welding positioning component (50) is used to clamp the bow beam (70). The third welding positioning component (50) is vertically arranged on the position adjustment component (20). The position adjustment component (20) is symmetrically arranged on both sides of the welding frame (10) along its length. The relative position of the third welding positioning component (50) on the welding frame (10) is adjusted by the position adjustment component (20). The fourth welding positioning component (60) is used for positioning welding of the fuselage connecting section (703) at the other end of the bow beam (70). The fourth welding positioning component (60) is vertically arranged on the position adjustment component (20), and the position adjustment component (20) is symmetrically arranged in the width direction of the welding frame (10). The relative position of the fourth welding positioning component (60) on the welding frame (10) is adjusted by the position adjustment component (20). The first welding positioning component (30), the second welding positioning component (40) and the third welding positioning component (50) are arranged sequentially along the length direction of the welding frame (10), and the fourth welding positioning component (60) is adjacent to the third welding positioning component (50).

2. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 1, characterized in that, The position adjustment component (20) includes: The first adjusting plate (201) is movable in the length and width directions of the welding frame (10); The second adjusting plate (202) is movably disposed above the first adjusting plate (201), and the moving direction of the second adjusting plate (202) is perpendicular to the moving direction of the first adjusting plate (201).

3. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 2, characterized in that, The first adjusting plate (201) is provided with a first adjusting elongated hole (2011) along its moving direction. The top surface of the welding frame (10) is provided with a first adjusting round hole (1023) corresponding to the first adjusting elongated hole (2011). The first adjusting plate (201) is provided with a plurality of second adjusting round holes (2012) parallel and symmetrically arranged in a direction perpendicular to the first adjusting elongated hole (2011). The second adjusting plate (202) is provided with a second adjusting elongated hole (2021) corresponding to the second adjusting round hole (2012).

4. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 2, characterized in that, The first welding positioning assembly (30) includes: The first step rod (301) includes a first round rod (3011) vertically fixed on the first adjusting plate (201) and a second round rod (3012) coaxially disposed on the upper part of the first round rod (3011), wherein the diameter of the first round rod (3011) is larger than the diameter of the second round rod (3012); The first sleeve (302) is movably sleeved on the second round rod (3012). The first sleeve (302) has a positioning part (3021) on its outside perpendicular to the central axis of the first sleeve (302). The sliding tube connector (701) is limited and fixed to the outside of the first sleeve (302) by the positioning part (3021). The inner diameter of the first sleeve (302) is smaller than the outer diameter of the first round rod (3011) and equal to the outer diameter of the second round rod (3012). A first height adjustment component (303) is disposed between the first rod sleeve (302) and the first round rod (3011) for adjusting the relative height of the slide tube connector (701); The first round rod (3011), the first rod sleeve (302) and the positioning part (3021) are respectively provided with air inlet holes (304) that are interconnected, for continuously introducing welding protective gas into the bow beam (70). The end of the second round rod (3012) away from the first round rod (3011) is provided with external thread and is fixed by a nut.

5. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 2, characterized in that, The second welding positioning component (40) is a second stepped rod, which includes a third round rod (401) vertically fixed on the first adjusting plate (201) and a fourth round rod (402) coaxially disposed on the upper part of the third round rod (401). The buffer welding lug (702) is engaged outside the fourth round rod (402). The end of the fourth round rod (402) away from the third round rod (401) is provided with an external thread and is fixed by a matching nut.

6. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 2, characterized in that, The third welding positioning assembly (50) includes: The mounting part (501) is vertically fixed to the first adjusting plate (201); A clamping mechanism (502) is used to clamp and fix the bow-shaped beam (70); A height adjustment mechanism (503) is rotatably disposed between the mounting part (501) and the clamping mechanism (502). Rotating the height adjustment mechanism (503) adjusts the distance between the mounting part (501) and the clamping mechanism (502).

7. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 6, characterized in that, The clamping mechanism (502) includes a first clamping block (5021) rotatably connected to the height adjustment mechanism (503) and a second clamping block (5022) detachably fixed to the first clamping block (5021). The first clamping block (5021) and the second clamping block (5022) have a positioning cavity (5023) for clamping the bow beam (70).

8. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 7, characterized in that, The height adjustment mechanism (503) includes: An adjusting screw (5031) is provided at both ends with external threads in different helical directions. The lower part of the first clamping block (5021) and the upper part of the mounting part (501) are respectively provided with internal thread holes that are adapted to the external threads at both ends of the adjusting screw (5031). A rotating block (5032) is sleeved and fixed in the middle of the adjusting screw (5031) for rotating the adjusting screw (5031); A locking nut (5033) is used to restrict the relative rotation between the adjusting screw (5031) and the first clamping block (5021) and the mounting part (501). The locking nut (5033) is rotatably sleeved on the external threads at both ends of the adjusting screw (5031).

9. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 2, characterized in that, The fourth welding positioning assembly (60) includes: The second step rod includes a fifth round rod (601) that is vertically fixed to the first adjusting plate (201) and a sixth round rod (602) that is coaxially fixed to the upper part of the fifth round rod (601). The diameter of the fifth round rod (601) is larger than the diameter of the sixth round rod (602). The fuselage connecting section (703) is movably sleeved outside the sixth round rod (602). The inner walls of both ends of the fuselage connecting section (703) are in contact with the sixth round rod (602). There is a gap between the middle section of the fuselage connecting section (703) and the sixth round rod (602) to form an exhaust chamber (603). The middle section of the fuselage connecting section (703) is provided with a through hole that communicates with the bow beam (70). The middle part of the sixth round rod (602) is provided with an exhaust channel (6021). The air inlet of the exhaust channel (6021) is located inside the exhaust chamber (603). The second height adjustment component (604) is disposed between the fuselage connecting section (703) and the fifth round rod (601) for adjusting the height of the fuselage connecting section (703); A sealing element (605) is sleeved on the outside of the sixth round rod (602) and located on the upper part of the fuselage connecting section (703); Fastener (606) is sleeved and fixed to the outside of the sixth round rod (602) and located on the upper part of the seal (605).

10. The flexible welding fixture for the bow-shaped beam of the skid-mounted landing gear with buffer as described in claim 3, characterized in that, The welding frame (10) includes a plurality of leg assemblies (101) for providing support and a frame assembly (102) disposed on the upper part of the leg assemblies (101), the frame assembly (102) being used to mount the position adjustment assembly (20); The outrigger assembly (101) includes a support rod (1011), a fixing plate (1012) at the lower part of the support rod (1011), a fixing hole (10121) on the fixing plate (1012), a connecting plate (1013) at the upper part of the support rod (1011), a connecting hole (10131) on the connecting plate (1013), and reinforcing ribs (1014) are provided between the fixing plate (1012) and the support rod (1011) and between the connecting plate (1013) and the support rod (1011). The frame assembly (102) includes a longitudinal beam (1021) for mounting the first welding positioning assembly (30), the second welding positioning assembly (40) and the third welding positioning assembly (50) and a transverse beam (1022) perpendicularly connected to the longitudinal beam (1021) for mounting the fourth welding positioning assembly (60); The first adjusting circular hole (1023) is provided on the top surface of the longitudinal beam (1021) and the cross beam (1022). The end faces and side faces of both ends of the longitudinal beam (1021) and the cross beam (1022) are provided with first mounting holes (1024). The first mounting holes (1024) are used for vertical connection between the longitudinal beam (1021) and the cross beam (1022) and / or connection between adjacent longitudinal beams (1021) and / or connection between adjacent cross beams (1022). The bottom surfaces of both ends of the longitudinal beam (1021) and the cross beam (1022) are provided with second mounting holes (1025) corresponding to the connecting hole (10131). The second mounting holes (1025) are used for connection between the connecting plate (1013) and the longitudinal beam (1021) and the cross beam (1022).

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