Laser welding device for maintenance of aviation mechanical parts

Abstract

The invention relates to the technical field of welding equipment, and provides a laser welding device for aviation mechanical part maintenance, which comprises a rack shell, a lifting mechanism, a second clamp, a driving mechanism, a welding template assembly, a horizontal adjusting assembly, a laser welding assembly and a laser cutting assembly, the driving mechanism is connected with the lifting mechanism, the lifting mechanism comprises a fixing pipe, the second clamp is used for clamping a header pipe, the fuel oil pipeline to be maintained can be positioned with the fixing pipe as the reference, and after the laser cutting head module is controlled to cut a branch pipe to be maintained and a branch pipe to be installed in the fuel oil pipeline along the welding guide rail, the fuel oil pipeline can be fixed. According to the device, the cut to-be-mounted branch pipe and the main pipe are automatically spliced, the laser welding head module can be controlled to weld the to-be-mounted branch pipe and the main pipe along the welding guide rail, the characteristics of automatic positioning and same-track cutting and welding are achieved, and the device has the characteristics of high precision and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to a laser welding device for repairing aviation machinery parts. Background Art

[0002] The fuel pipeline system of an aircraft is an important part of aircraft fuel management. Its main function is to transport fuel from the fuel tank to the engine to ensure the fuel supply of the engine at different stages of flight. The fuel pipeline is a pipeline system that transports fuel from the fuel tank to the engine. It is usually made of corrosion-resistant materials to withstand high pressure and temperature changes. Please refer to the attached manual for details. Fig.12 The rigid main part of the fuel pipeline consists of a main pipe and branch pipes, which are assembled together using laser welding technology. When a branch pipe is damaged due to collision, aging and other factors and needs to be repaired, the damaged branch pipe is usually cut along the welding track first, and then a new branch pipe is welded to the main pipe.

[0003] Existing laser welding devices for fuel pipeline maintenance include handheld laser welding machines and automatic laser welding machines. Handheld laser welding machines are manual welding methods with relatively high entry barriers. They require experienced staff to complete, and the welding efficiency cannot be guaranteed. Due to the high purchase and use costs of automatic laser welding machines on the current market, they are only suitable for large-scale product production industries. However, fuel pipeline maintenance welding is small-batch, and the sizes of branch pipes and main pipes in fuel pipelines are customized or single. Therefore, the application of automatic laser welding machines in the field of fuel pipeline maintenance has the defect of high use costs.

[0004] Therefore, there is an urgent need for a low-cost, high-precision laser welding device suitable for small-batch maintenance of aviation machinery parts to solve the problem of fuel pipeline maintenance welding of aircraft. Summary of the invention

[0005] The purpose of the present invention is to provide a laser welding device for repairing aviation machinery parts, aiming to solve the problems existing when using the laser welding device for repairing fuel pipelines.

[0006] To achieve the above object, the present invention provides the following technical solution: a laser welding device for repairing aviation machinery parts, comprising a frame shell, a lifting mechanism, a second clamp and a driving mechanism, wherein the lifting mechanism and the second clamp are both connected to the frame shell, the driving mechanism is connected to the lifting mechanism, the lifting mechanism comprises a fixed pipe, the second clamp is used to clamp the main pipe, and further comprises: Welding template assembly, the welding template assembly includes a welding template part, a longitudinal moving part and a second rotating part. The welding template part includes a template sample tube and a welding guide rail. The welding guide rail is made on the surface of the template sample tube, and the welding guide rail is consistent with the welding track. The upper end of the template sample tube is fixedly connected to the driving mechanism; the longitudinal moving part includes a lifting ring, a ball head and a sliding rod. Two ball heads are fixedly connected to the inner wall of the lifting ring, and the sliding rod is fixedly connected to one side of the lifting ring. The ball head is slidably connected in the welding guide rail; the second rotating part includes a rotating ring and a first radial guide rail. The first radial guide rail is arranged on the surface of the rotating ring, and the rotating ring is movably sleeved on the surface of the lifting ring; Horizontal adjustment component, the horizontal adjustment component includes a fixing plate, a second radial guide rail, a third telescopic member, a C-shaped frame and a limiting hole. The lower end of the template sample tube is fixedly connected to the fixing plate. The template sample tube and the fixing plate are both movably sleeved on the surface of the fixed tube. The third telescopic member is fixedly connected to the fixing plate. The C-shaped frame is fixedly connected to the third telescopic member. The second radial guide rail and the limiting hole are respectively arranged on the surfaces of the fixing plate and the C-shaped frame; Laser welding component, the laser welding component includes a bearing rod and a laser welding head module. The bearing rod is movably sleeved in the limiting hole. Both the first radial guide rail and the second radial guide rail are slidably connected to the bearing rod. Laser welding head modules and laser cutting components are respectively installed at the two ends of the bearing rod.

[0007] As a further aspect of the present invention, it further includes a first fixture. The first fixture includes a worm, a second driven gear, a first limiting clamp and a worm gear. The second driven gear is fixedly connected to the worm. The worm is connected to the inner wall of the fixed tube. The driving mechanism is in transmission connection with the second driven gear. The worm gear is connected to the surface of the fixed tube. The first limiting clamp is fixedly connected to the worm gear. The worm is in transmission connection with the worm gear. The three first limiting clamps are used for clamping the branch pipe.

[0008] As a further aspect of the present invention, the driving mechanism includes a driving module, an adjustable transmission part and a first rotating part. The driving module includes a driving motor and a driving shaft. The driving motor is connected to the driving shaft. The surface of the driving shaft is provided with a limiting rib; the adjustable transmission part includes a driving gear, a sleeve, a second telescopic member and a cross plate. The driving gear is fixedly connected to the sleeve. The sleeve is movably sleeved on the surface of the driving shaft. The inner wall of the sleeve is provided with a limiting groove. The limiting rib is slidably connected to the limiting groove. One end of the cross plate is movably sleeved on the surface of the sleeve. The second telescopic member is fixedly connected to the other end of the cross plate.

[0009] As a further solution of the present invention, the first rotating part includes a rotating tube, a No. 1 driven gear and a first fixed plate. The rotating tube is movably sleeved on the surface of the fixed tube. The No. 1 driven gear and the first fixed plate are both fixedly connected to the rotating tube. Both ends of the template sample tube are fixedly connected to a second fixed plate. The two second fixed plates are respectively fixedly connected to the first fixed plate and the fixed plate. The No. 2 driven gear and the No. 1 driven gear are both transmission-connected to the driving gear.

[0010] As a further solution of the present invention, the lifting mechanism also includes a lifting frame, a first telescopic member and a bracket, the first telescopic member is fixedly connected to the frame shell, the lifting frame is fixedly connected to the first telescopic member, the bracket is fixedly connected to the lifting frame, the fixed pipe is fixedly connected to the lifting frame, and the drive motor and the second telescopic member are both fixedly connected to the bracket.

[0011] As a further solution of the present invention, the laser welding assembly also includes a fixed shell, a limit block and a drive motor. The fixed shell and the limit block are respectively fixedly connected to the two ends of the supporting rod, and the two limit blocks are distributed on both sides of the first radial guide rail. The laser welding head module is rotatably connected in the fixed shell, the drive motor is fixedly connected to the fixed shell, and the laser welding head module is connected to the drive motor.

[0012] As a further solution of the present invention, the second clamp includes a fourth telescopic member and a second limiting clamp, the frame housing is fixedly connected to the fourth telescopic member, and the second limiting clamp is fixedly connected to the fourth telescopic member.

[0013] The beneficial effects of the present invention are that the present application utilizes a structural design in which a driving mechanism, a welding template assembly, a horizontal adjustment component, a laser welding component and a laser cutting component cooperate with each other, which can not only position the fuel pipeline to be repaired with a fixed pipe as a reference, but also control the laser cutting head module to cut the branch pipe to be repaired and the branch pipe to be installed in the fuel pipeline along the welding guide rail, and then automatically splice the cut branch pipe to be installed with the main pipe, and can also control the laser welding head module to weld the branch pipe to be installed with the main pipe along the welding guide rail. Compared with the traditional fuel pipeline repair welding method, the characteristics of automatic positioning, automatic same-track cutting and welding are realized, and the characteristics of good stability, high precision and low cost are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereogram of the present invention.

[0015] Figure 2 It is an exploded view of the present invention.

[0016] Figure 3 It is a three-dimensional diagram of the lifting mechanism according to an embodiment of the present invention.

[0017] Figure 4 1 is an exploded view of the driving mechanism of an embodiment of the present invention.

[0018] Figure 5 It is an exploded view of the welding template assembly according to an embodiment of the present invention.

[0019] Figure 6 It is a cross-sectional view of a welding template assembly according to an embodiment of the present invention.

[0020] Figure 7 It is an exploded view of the horizontal adjustment component according to an embodiment of the present invention.

[0021] Figure 8 It is a three-dimensional diagram of a laser welding assembly according to an embodiment of the present invention.

[0022] Fig. 9 It is a three-dimensional diagram of the first clamp according to an embodiment of the present invention.

[0023] Fig.10 It is an assembly drawing of the lifting mechanism, driving mechanism, welding template assembly, level adjustment component, laser welding component and laser cutting component of the embodiment of the invention.

[0024] Fig.11 It is a front view of the present invention.

[0025] Fig.12 It is a stereoscopic diagram of a fuel pipeline according to an embodiment of the present invention.

[0026] Reference numerals: 1 - lifting mechanism, 11 - fixed pipe, 12 - lifting frame, 13 - first telescopic member, 14 - bracket, 2 - driving mechanism, 21 - driving module, 211 - driving motor, 212 - driving shaft, 22 - adjustable transmission part, 221 - driving gear, 222 - sleeve, 223 - second telescopic member, 224 - cross plate, 23 - first rotating part, 231 - rotating pipe, 232 - first driven gear, 233 - first fixing plate, 3 - welding template assembly, 31 - welding template part, 311 - template sample pipe, 312 - welding guide rail, 313 - second fixing plate, 32 - longitudinal moving part, 321 - lifting ring, 322 - ball head, 323 - sliding rod, 33 - second rotating part, 331 - rotating ring, 332 - first radial guide rail, 4 - horizontal adjustment assembly, 41 - fixing plate, 42 - second radial guide rail, 43 - third telescopic member, 44 - C-shaped frame, 45 - limiting hole, 5 - laser welding assembly, 51 - bearing rod, 52 - fixed housing, 53 - limiting block, 54 - laser welding head module, 55 - driving motor, 6 - laser cutting assembly, 61 - laser cutting head module, 7 - first fixture, 71 - worm, 72 - second driven gear, 73 - first limiting clamp, 74 - worm gear, 8 - second fixture, 81 - fourth telescopic member, 82 - second limiting clamp, 9 - frame housing, 10 - fuel pipeline, 101 - branch pipe, 102 - main pipe, 103 - maintenance welding track. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The following describes in detail the specific implementation of the present invention with reference to specific embodiments.

[0029] Please refer to Figures 1 to 12 , in an embodiment of the present invention, a laser welding device for repairing aviation mechanical parts includes a frame housing 9, a lifting mechanism 1, a second fixture 8 and a driving mechanism 2. The lifting mechanism 1 and the second fixture 8 are both connected to the frame housing 9, the driving mechanism 2 is connected to the lifting mechanism 1, the lifting mechanism 1 includes a fixed pipe 11, the second fixture 8 is used for clamping the main pipe 102, and further includes: Welding template assembly 3, the welding template assembly 3 includes a welding template part 31, a longitudinal movement part 32 and a second rotation part 33. The welding template part 31 includes a template sample pipe 311 and a welding guide rail 312. The welding guide rail 312 is made on the surface of the template sample pipe 311, and the welding guide rail 312 is consistent with the welding track. The upper end of the template sample pipe 311 is fixedly connected to the driving mechanism 2; the longitudinal movement part 32 includes a lifting ring 321, a ball head 322 and a slide bar 323. Two ball heads 322 are fixedly connected to the inner wall of the lifting ring 321, and the slide bar 323 is fixedly connected to one side of the lifting ring 321. The ball head 322 is slidably connected in the welding guide rail 312; the second rotation part 33 includes a rotation ring 331 and a first radial guide rail 332. The first radial guide rail 332 is arranged on the surface of the rotation ring 331, and the rotation ring 331 is movably sleeved on the surface of the lifting ring 321; Horizontal adjustment assembly 4, the horizontal adjustment assembly 4 includes a fixing plate 41, a second radial guide rail 42, a third telescopic member 43, a C-shaped frame 44 and a limiting hole 45. The lower end of the template sample pipe 311 is fixedly connected to the fixing plate 41. Both the template sample pipe 311 and the fixing plate 41 are movably sleeved on the surface of the fixed pipe 11. The third telescopic member 43 is fixedly connected to the fixing plate 41, and the C-shaped frame 44 is fixedly connected to the third telescopic member 43. The second radial guide rail 42 and the limiting hole 45 are respectively arranged on the surfaces of the fixing plate 41 and the C-shaped frame 44; Laser welding assembly 5, the laser welding assembly 5 includes a bearing rod 51 and a laser welding head module 54. The bearing rod 51 is movably sleeved in the limiting hole 45. Both the first radial guide rail 332 and the second radial guide rail 42 are slidably connected to the bearing rod 51. Laser welding head modules 54 and laser cutting assemblies 6 are respectively installed at the two ends of the two bearing rods 51.

[0030] Please refer to Figure 8 , further, the laser welding assembly 5 further includes a fixed shell 52, a limiting block 53 and a driving motor 55. The fixed shell 52 and the limiting block 53 are respectively fixedly connected to the two ends of the bearing rod 51. The two limiting blocks 53 are distributed on both sides of the first radial guide rail 332. The laser welding head module 54 is rotatably connected in the fixed shell 52. The driving motor 55 is fixedly connected to the fixed shell 52, and the laser welding head module 54 is connected to the driving motor 55.

[0031] Please refer to Figure 1 and Fig.11 , further, the second fixture 8 includes a fourth telescopic member 81 and a second limiting clip 82. The frame housing 9 is fixedly connected to the fourth telescopic member 81, and the second limiting clip 82 is fixedly connected to the fourth telescopic member 81.

[0032] In the embodiment of the present invention, the size of the template sample tube 311 is not limited. The template sample tube 311 is made of alloy material. The manufacturing method of the welding guide rail 312 is as follows: a tool path is generated according to the original welding trajectory of the fuel pipeline 10, and a CNC machine tool is used to control the tool to process the welding guide rail 312 on the surface of the template sample tube 311. The welding guide rail 312 is a curved groove on the surface of the template sample tube 311. The template sample tube 311 is installed between the rotating tube 231 and the fixed plate 41 through a second fixing plate. This is a detachable fixing method, which is convenient for replacing different welding trajectories according to different welding trajectories. Template sample tube 311, laser cutting assembly 6 includes laser cutting head module 61, the number of driving motors 55 is two, one driving motor 55 is connected to the rotating shaft of laser welding head module 54, used to adjust the welding angle of laser welding head module 54, and the other is connected to the rotating shaft of laser cutting head module 61, used to control the cutting angle of laser welding head module 54, the difference between laser cutting head module 61 and laser welding head module 54: laser cutting head is usually equipped with a focusing lens, which can focus the laser beam to a very small point to achieve high power density and achieve cutting effect. The design of laser welding head pays more attention to the uniformity and stability of the beam to ensure uniform energy transfer during welding.

[0033] See also Figure 4 and Fig.10 In one embodiment of the present invention, the driving mechanism 2 includes a driving module 21, an adjustable transmission part 22 and a first rotating part 23, the driving module 21 includes a driving motor 211 and a driving shaft 212, the driving motor 211 is connected to the driving shaft 212, and a limiting rib is provided on the surface of the driving shaft 212; The adjustable transmission part 22 includes a driving gear 221, a sleeve 222, a second telescopic member 223 and a cross plate 224. The driving gear 221 is fixedly connected to the sleeve 222. The sleeve 222 is movably sleeved on the surface of the driving shaft 212. A limiting groove is provided on the inner wall of the sleeve 222. The limiting rib is slidably connected to the limiting groove. One end of the cross plate 224 is movably sleeved on the surface of the sleeve 222. The second telescopic member 223 is fixedly connected to the other end of the cross plate 224.

[0034] See also Figure 4 and Fig.10 Further, the first rotating part 23 includes a rotating tube 231, a number one driven gear 232 and a first fixed disk 233, the rotating tube 231 is movably sleeved on the surface of the fixed tube 11, the number one driven gear 232 and the first fixed disk 233 are both fixedly connected to the rotating tube 231, and both ends of the template sample tube 311 are fixedly connected to the second fixed disk 313, and the two second fixed disks 313 are respectively fixedly connected to the first fixed disk 233 and the fixed plate 41.

[0035] See also Figure 1 , Figure 3 and Fig.10 Furthermore, the lifting mechanism 1 also includes a lifting frame 12, a first telescopic member 13 and a bracket 14, the first telescopic member 13 is fixedly connected to the frame shell 9, the lifting frame 12 is fixedly connected to the first telescopic member 13, the bracket 14 is fixedly connected to the lifting frame 12, the fixed pipe 11 is fixedly connected to the lifting frame 12, and the drive motor 211 and the second telescopic member 223 are both fixedly connected to the bracket 14.

[0036] In the embodiment of the present invention, the first telescopic member 13 is a hydraulic telescopic rod, and the second telescopic member 223, the third telescopic member 43 and the fourth telescopic member are all electric telescopic rods.

[0037] See also Figures 9 and 10 In one embodiment of the present invention, a first clamp 7 is further included, wherein the first clamp 7 includes a worm 71, a second driven gear 72, a first limiting clamp 73 and a worm wheel 74, wherein the second driven gear 72 is fixedly connected to the worm 71, the worm 71 is connected to the inner wall of the fixed tube 11, the driving mechanism 2 is transmission-connected to the second driven gear 72, the worm wheel 74 is connected to the surface of the fixed tube 11, the first limiting clamp 73 is fixedly connected to the worm wheel 74, the worm 71 is transmission-connected to the worm wheel 74, the three first limiting clamps 73 are used to clamp the branch pipe 101, and the second driven gear 72 and the first driven gear 232 are both transmission-connected to the driving gear 221.

[0038] In an embodiment of the present invention, when the driving motor 211 controls the rotation of the driving gear 221 through the driving shaft 212, under the adjustment control of the rotating second telescopic member 223, the second driven gear 72 and the first driven gear 232 are respectively connected to the driving gear 221 in transmission, which can not only control the laser cutting head module 61 and the laser welding head module 54 to cut and weld along the welding guide rail 312, but also control the first limit clamp 73 to fix the branch pipe 101 in a position coaxial with the fixed pipe 11, thereby facilitating the positioning of the main pipe, thereby ensuring the subsequent precise cutting, precise splicing and precise welding processes.

[0039] Working principle: Step 1, cutting stage of the branch pipe 101 to be repaired in the fuel pipeline 10: first, put the branch pipe 101 into the fixed pipe 11 for a certain distance, and then use the second telescopic member 223 to adjust the driving gear 221 to a position in transmission connection with the second driven gear 72, and then use the drive motor 211 to control the rotation of the drive shaft 212, the driving gear 221, the second driven gear 72, the worm 71, the worm wheel 74 and the first limiting clamp 73, so that the branch pipe 101 is fixed by the first limiting clamp 73 to ensure that the axis of the branch pipe 101 is consistent with that of the fixed pipe 11, and then use the first telescopic member 13 to control the lifting frame 12, the fixed pipe 11, and the first limiting clamp 73 to perform lifting and lowering movements, so that the main pipe 102 is located in the second limiting clamp 82, and then use the fourth telescopic member 81 to control the second limiting clamp 82 to fix and clamp the main pipe 102, and then use the drive motor 21 The first limiting clamp 73 is controlled to release the branch pipe 101, and the height, horizontal position and angle of the laser cutting head module 61 are adjusted by the first telescopic member 13, the third telescopic member 43 and the driving motor 55 respectively, so that the laser cutting head module 61 contacts the original welding track at a certain angle, and then the driving gear 221 is adjusted to a position where it is connected to the first driven gear 232 by transmission by the second telescopic member 223, and the rotating tube 231, the template sample tube 311, the fixing plate 41, the bearing rod 51, the rotating ring 331 and the laser cutting head module 61 are controlled by the driving motor 211 to rotate with the branch pipe 101 as the axis, and the rotating template sample tube 311 controls the lifting ring 321 and the rotating and bearing rod 51 to perform lifting and lowering movements by the way of sliding connection between the welding guide rail 312 and the ball head 322, so that the laser cutting head module 61 can perform cutting along the original welding track.

[0040] Step 2, cutting stage of the branch pipe 101 to be installed: use the operating method of step 1 to control the first limit clamp 73 to clamp and fix the branch pipe 101 to be installed, and use the operating method of step 1 to control the laser cutting head module 61 to cut the surface of the branch pipe 101 to be installed into a splicing interface consistent with the original welding trajectory.

[0041] Step three, welding stage: use the operating method of step one to control the alignment of the incisions of the branch pipe 101 to be installed and the main pipe 102, and then use the third telescopic member 43 to control the reverse movement of the bracket 44, so that the laser cutting head module 61 and the laser welding head module 54 are respectively away from and close to the branch pipe 101 to be installed, and use the operating method of step one to control the laser welding head to contact the splicing interface at a certain angle, and use the operating method of step one to control the laser welding head module 54 to weld along the welding guide rail 312, so as to form a maintenance welding track 103 between the branch pipe 101 to be installed and the main pipe 102.

[0042] In summary, the present application utilizes a structural design in which the driving mechanism 2, the welding template assembly 3, the horizontal adjustment component 4, the laser welding component 5 and the laser cutting component 6 cooperate with each other, which can not only position the fuel pipeline 10 to be repaired with the fixed pipe 11 as a reference, but also control the laser cutting head module 61 to cut the branch pipe 101 to be repaired and the branch pipe 101 to be installed in the fuel pipeline 10 along the welding guide rail 312, and then automatically splice the cut branch pipe 101 to be installed with the main pipe 102, and can also control the laser welding head module 54 to weld the branch pipe 101 to be installed with the main pipe 102 along the welding guide rail 312. Compared with the traditional fuel pipeline 10 repair welding method, it realizes the characteristics of automatic positioning, automatic same-track cutting and welding, and has the characteristics of good stability, high precision and low cost.

[0043] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the main purpose of the invention.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A laser welding device for repairing aviation machinery parts, comprising a frame shell (9), a lifting mechanism (1), a second clamp (8) and a driving mechanism (2), wherein the lifting mechanism (1) and the second clamp (8) are both connected to the frame shell (9), the driving mechanism (2) is connected to the lifting mechanism (1), the lifting mechanism (1) comprises a fixed pipe (11), and the second clamp (8) is used to clamp a main pipe (102), characterized in that: It further includes: A welding template assembly (3), which includes a welding template part (31), a longitudinal movement part (32) and a second rotation part (33). The welding template part (31) includes a template sample pipe (311) and a welding guide rail (312). The welding guide rail (312) is made on the surface of the template sample pipe (311), and the welding guide rail (312) is consistent with the welding track. The upper end of the template sample pipe (311) is fixedly connected to the driving mechanism (2); the longitudinal movement part (32) includes a lifting ring (321), a ball head (322) and a sliding rod (323). The two ball heads (322) are fixedly connected to the inner wall of the lifting ring (321), the sliding rod (323) is fixedly connected to one side of the lifting ring (321), and the ball head (322) is slidably connected in the welding guide rail (312); the second rotation part (33) includes a rotation ring (331) and a first radial guide rail (332). The first radial guide rail (332) is arranged on the surface of the rotation ring (331), and the rotation ring (331) is movably sleeved on the surface of the lifting ring (321). A horizontal adjustment component (4), which includes a fixed plate (41), a second radial guide rail (42), a third telescopic member (43), a C-shaped frame (44) and a limiting hole (45). The lower end of the template sample pipe (311) is fixedly connected to the fixed plate (41). Both the template sample pipe (311) and the fixed plate (41) are movably sleeved on the surface of the fixed pipe (11). The third telescopic member (43) is fixedly connected to the fixed plate (41), the C-shaped frame (44) is fixedly connected to the third telescopic member (43), and the second radial guide rail (42) and the limiting hole (45) are respectively arranged on the surfaces of the fixed plate (41) and the C-shaped frame (44). A laser welding component (5), which includes a bearing rod (51) and a laser welding head module (54). The bearing rod (51) is movably sleeved in the limiting hole (45). Both the first radial guide rail (332) and the second radial guide rail (42) are slidably connected to the bearing rod (51). Laser welding head modules (54) and a laser cutting component (6) are respectively installed at the two ends of the bearing rod (51).

2. The laser welding device for repairing aviation machinery parts according to claim 1, characterized in that: It further includes a first fixture (7), which includes a worm (71), a second driven gear (72), a first limiting clamp (73) and a worm gear (74). The second driven gear (72) is fixedly connected to the worm (71). The worm (71) is connected to the inner wall of the fixed pipe (11). The driving mechanism (2) is in transmission connection with the second driven gear (72). The worm gear (74) is connected to the surface of the fixed pipe (11). The first limiting clamp (73) is fixedly connected to the worm gear (74). The worm (71) is in transmission connection with the worm gear (74). The three first limiting clamps (73) are used for clamping the branch pipe (101).

3. The laser welding device for repairing aviation machinery parts according to claim 2, characterized in that: The driving mechanism (2) comprises a driving module (21), an adjustable transmission part (22) and a first rotating part (23); the driving module (21) comprises a driving motor (211) and a driving shaft (212); the driving motor (211) is connected to the driving shaft (212); and a limiting rib is provided on the surface of the driving shaft (212); The adjustable transmission part (22) comprises a driving gear (221), a sleeve (222), a second telescopic member (223) and a transverse plate (224); the driving gear (221) is fixedly connected to the sleeve (222); the sleeve (222) is movably sleeved on the surface of the driving shaft (212); a limiting groove is provided on the inner wall of the sleeve (222); the limiting rib is slidably connected to the limiting groove; one end of the transverse plate (224) is movably sleeved on the surface of the sleeve (222); and the second telescopic member (223) is fixedly connected to the other end of the transverse plate (224).

4. The laser welding device for repairing aviation machinery parts according to claim 3 is characterized in that: The first rotating part (23) comprises a rotating tube (231), a first driven gear (232) and a first fixed plate (233); the rotating tube (231) is movably sleeved on the surface of the fixed tube (11); the first driven gear (232) and the first fixed plate (233) are both fixedly connected to the rotating tube (231); both ends of the template sample tube (311) are fixedly connected to second fixed plates (313); the two second fixed plates (313) are respectively fixedly connected to the first fixed plate (233) and the fixed plate (41); the second driven gear (72) and the first driven gear (232) are both drivingly connected to the driving gear (221).

5. The laser welding device for repairing aviation machinery parts according to claim 4, characterized in that: The lifting mechanism (1) further comprises a lifting frame (12), a first telescopic member (13) and a bracket (14); the first telescopic member (13) is fixedly connected to the frame shell (9); the lifting frame (12) is fixedly connected to the first telescopic member (13); the bracket (14) is fixedly connected to the lifting frame (12); the fixed pipe (11) is fixedly connected to the lifting frame (12); and the driving motor (211) and the second telescopic member (223) are both fixedly connected to the bracket (14).

6. The laser welding device for repairing aviation machinery parts according to claim 1, characterized in that: The laser welding assembly (5) further comprises a fixed shell (52), a limit block (53) and a driving motor (55); the fixed shell (52) and the limit block (53) are respectively fixedly connected to the two ends of the bearing rod (51); the two limit blocks (53) are distributed on both sides of the first radial guide rail (332); the laser welding head module (54) is rotatably connected in the fixed shell (52); the driving motor (55) is fixedly connected to the fixed shell (52); and the laser welding head module (54) is connected to the driving motor (55).

7. The laser welding device for repairing aviation machinery parts according to claim 1, characterized in that: The second clamp (8) comprises a fourth telescopic member (81) and a second limiting clamp (82); the frame housing (9) is fixedly connected to the fourth telescopic member (81); and the second limiting clamp (82) is fixedly connected to the fourth telescopic member (81).

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