A welding device and method for aircraft landing gear production

Abstract

The application belongs to the technical field of aircraft landing gear processing, and particularly relates to a welding device and method for aircraft landing gear production. The device comprises a workpiece clamping assembly and a multifunctional welding assembly. The workpiece clamping assembly adopts mechanical clamping and vacuum adsorption double fixation, can adaptively clamp the buffer cylindrical body and the movable rod, can drive the workpiece to vertically overturn and circumferentially rotate, and does not need manual secondary disassembly and positioning. The multifunctional welding assembly integrates two groups of independent adjustable welding mechanisms, can realize multi-dimensional adjustment and control of welding height, inclination angle and circumferential position, and can integrally weld the buckle component, the hinged lug seat, the storage sleeve component and the scraping seat at one time. The device is suitable for welding the hinged lug seat with different dislocation angles. The device has high positioning accuracy, reduces welding seam deviation and assembly dislocation, the processed buffer integrates mechanical anti-falling and linkage scraping structure, can automatically clean the impurities of the movable rod, improves the connection reliability of the lug seat, and is suitable for batch standardized welding production of the landing gear buffer.

Description

Technical Field

[0001] This invention belongs to the field of aircraft landing gear processing technology, specifically relating to a welding device and method for aircraft landing gear production. Background Technology

[0002] The rocker arm landing gear is a load-bearing component of the aircraft's takeoff and landing system, determining the stability and safety of the aircraft during takeoff, landing, and taxiing. The shock absorber, as a vibration damping component of the rocker arm landing gear, effectively absorbs takeoff and landing impact loads, preventing damage to the fuselage structure, and is a key part of the landing gear assembly manufacturing. The shock absorber mainly consists of an outer cylinder and an inner cylinder nested together. During aircraft takeoff and landing, when the shock absorber is subjected to external impact forces, the inner cylinder gradually retracts into the outer cylinder to buffer and dissipate the impact energy. However, traditional landing gear shock absorbers have significant drawbacks in actual use. Firstly, during the shock absorber's extension and retraction, the inner cylinder easily carries external dust, metal debris, and other impurities into the outer cylinder. Long-term accumulation of these impurities can hinder the extension and retraction of the inner cylinder, causing jamming and blockage inside the outer cylinder, reducing the shock absorber's buffering accuracy and response efficiency. Secondly, frequent hard collisions between the lower surfaces of the inner and outer cylinders, with large impact forces, can easily cause severe wear on the mating surfaces of the inner and outer cylinders, leading to excessive clearance and resulting in a decrease in the shock absorber's damping performance and a significant reduction in its service life. Secondly, the hinge lugs at both ends of the traditional buffer workpiece are fixed to the buffer body by welding only the outer circumferential weld, without the setting of an internal anti-detachment connection structure. The connection reliability is poor, and it cannot adapt to the welding and assembly requirements of hinge lugs with different misalignment angles. The connection stability of the lugs after welding is insufficient. Under long-term load, the weld is prone to cracking and the lugs are prone to shifting and loosening, which directly affects the overall load-bearing performance and motion accuracy of the landing gear.

[0003] In the overall assembly structure of the rocker arm landing gear, the hinge lugs at both ends of the buffer are the connecting hubs between the landing gear and the fuselage and rocker arm structure. The welding position, angle accuracy, and connection firmness of these lugs directly determine the assembly accuracy, movement flexibility, and overall load-bearing capacity of the landing gear, and also indirectly affect the coaxiality and stability of the buffer's telescopic operation. If the welding accuracy of the hinge lugs is substandard or the connection structure is weak, it will cause the overall assembly of the buffer to shift, exacerbating eccentric wear and jamming problems during the operation of the inner and outer cylinders, further worsening the working conditions of the buffer, and reducing the overall service stability of the landing gear.

[0004] In view of this, it is necessary to optimize and improve the existing welding equipment and welding methods used in aircraft landing gear production in order to overcome the defects of the existing technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems existing in the prior art and to provide a welding apparatus and method for the production of aircraft landing gear.

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: This invention provides a welding apparatus for aircraft landing gear production, including a workpiece clamping assembly and a multi-functional welding assembly; The workpiece clamping assembly is used to clamp and lock the buffer workpiece to be processed, and can drive the buffer workpiece to achieve vertical flipping. The multi-functional welding assembly is mounted above the workpiece clamping assembly and is used to perform multi-station welding operations on the clamped and fixed buffer workpiece. The multi-station welding operations include welding of the buckle components at both ends of the buffer, welding of the hinge ear seat, welding of the storage sleeve component and welding of the scraper seat. The buffer component includes a buffer, a snap-fit ​​component, a first hinged lug, a second hinged lug, a storage sleeve component, a scraper seat, a scraper component, and a transmission component. The scraper component is movably assembled inside the scraper seat. The transmission component is in transmission cooperation with the scraper component and the second hinged lug, respectively, and can drive the scraper component to run by relying on the structural linkage of the second hinged lug.

[0007] Furthermore, in the aforementioned welding device for aircraft landing gear production, the buffer includes a cylindrical cylinder, a movable rod, an oil injection pipe, and a cylindrical mounting block; the oil injection pipe is fixedly located on the periphery of the cylindrical cylinder near one end, the movable rod is telescopically mounted on the end of the cylindrical cylinder away from the oil injection pipe, and the cylindrical mounting block is fixedly mounted on the outer end of the movable rod.

[0008] Furthermore, in the aforementioned welding device for aircraft landing gear production, the first hinge lug is located at the outer end of the cylindrical cylinder near the oil injection pipe. The first hinge lug includes a first lug body, the outer side of the first lug body is provided with a first lug with a hinge hole, and the inner side of the first lug body is provided with a first stepped groove. The second hinge ear is located at the outer end of the cylindrical mounting block. The second hinge ear includes a second ear body. The outer side of the second ear body is provided with a second protrusion with a hinge hole. The inner side of the second ear body is provided with a second stepped groove. The outer periphery of the second ear body is supported by a rack via a first protrusion.

[0009] Furthermore, in the aforementioned welding device for aircraft landing gear production, the snap-fit ​​component is composed of a connecting plate and a circumferential snap-fit ​​located on its outer side; the storage sleeve component includes a storage sleeve, the two ends of which are provided with collars fitted onto the outer side of the cylindrical cylinder, and one end of the storage sleeve is provided with a rack storage cavity extending inward.

[0010] Furthermore, in the aforementioned welding device for aircraft landing gear production, the scraper seat includes a scraper seat body. The outer periphery of the scraper seat body is provided with a second protrusion. The scraper seat body is provided with a positioning groove, an upper clearance groove, a scraper component movable groove, and a lower clearance groove in sequence from top to bottom. The diameter of the positioning groove matches the outer diameter of the cylindrical cylinder. The diameters of the upper clearance groove and the lower clearance groove are both smaller than the outer diameter of the cylindrical cylinder and larger than the outer diameter of the movable rod. The scraper seat body has multiple radial through grooves along the circumferential direction on the side wall of the upper clearance groove. The second protrusion has a transmission component movable groove that matches the transmission component and a through groove that facilitates the rack to pass through. The two ends of the transmission component movable groove are respectively connected to the scraper component movable groove and the through groove.

[0011] Furthermore, in the aforementioned welding device for aircraft landing gear production, the scraping component is restricted to movement within the scraping component movement groove. The scraping component includes a frustum, with a ring of toothed grooves on the outer side of the wide portion of the frustum. A cylindrical through groove is provided inside the frustum, and a scraping screw is installed on the inner wall of the frustum located within the cylindrical through groove. The scraping screw has a scraping channel inside that matches the outer diameter of the moving rod.

[0012] Furthermore, in the aforementioned welding device for aircraft landing gear production, the transmission component includes a transmission shaft, one end of which is provided with a transmission bevel gear that engages with the tooth groove in the scraping component, and the other end of which is provided with a transmission gear that engages with a rack.

[0013] Furthermore, in the aforementioned welding apparatus for aircraft landing gear production, the workpiece clamping assembly includes a first base plate, a rotary driver, a lead screw support, a lead screw, a lead screw motor, a carrier plate, mechanical grippers, a first vacuum pump, a clamping plate, a T-joint pipe, and a flexible hose. The first base plate is supported by the lead screw support via the rotary driver. The lead screw support movably supports the lead screw. The lead screw motor is mounted on the lead screw support. The lead screw motor is connected to the lead screw via a steering gear set. The lead screw has two lead screw segments with opposite directions of rotation, and each lead screw segment is fitted with a sleeve on its outer side. The device includes a carrier plate with restricted rotation, on which mechanical grippers and a first vacuum pump are mounted. The mechanical grippers have two clamping plates capable of relative displacement. The clamping plates have an arc-shaped adsorption cavity inside, and the inner arc surface of the clamping plates is evenly distributed with first adsorption holes communicating with the arc-shaped adsorption cavity. The inner arc surfaces of the two sets of clamping plates respectively cooperate with the outer diameter of the cylindrical cylinder and the cylinder of the movable rod. The suction end of the first vacuum pump is connected to the exhaust branch of the three-way pipe, and the two suction branches of the three-way pipe are respectively connected to the arc-shaped adsorption cavity of the corresponding clamping plate via flexible hoses.

[0014] Furthermore, in the aforementioned welding apparatus for aircraft landing gear production, the multifunctional welding assembly includes a second base plate. The second base plate is supported by a lifting push rod and has a cylindrical clamping seat. The bottom side of the cylindrical clamping seat has a clamping groove that mates with a first lug or a second lug. The cylindrical clamping seat has an arched adsorption cavity located around the clamping groove. The inner surface of the clamping groove is evenly distributed with a plurality of second adsorption holes that communicate with the arched adsorption cavity. A second suction pump is embedded in the cylindrical clamping seat. The suction end of the second suction pump communicates with the arched adsorption cavity. A rotating seat is movably sleeved on the lower outer side of the cylindrical clamping seat. A driven bevel gear is provided on the upper part of the rotating seat. A tilting drive motor is installed on the outer side of the cylindrical clamping seat. An active bevel gear that meshes with the driven bevel gear is installed on the output end of the tilting drive motor. A first welding mechanism and a second welding mechanism are symmetrically installed on the rotating seat. The first welding mechanism includes a first tilting motor, a drive gear, a first flap and a first welding head. The output end of the first tilting motor is equipped with a drive gear. The inner end of the first flap is provided with an incomplete gear that meshes with the drive gear and a positioning shaft passes through the center of the incomplete gear. The inner side of the outer end of the first flap is equipped with a first welding head. The second welding mechanism includes a height adjustment push rod, a carrier frame, a second flip plate, a second tilt adjustment motor, and a second welding head. The movable end of the height adjustment push rod is equipped with a carrier frame, and the carrier frame movably supports the second flip plate via an ear seat. The second tilt adjustment motor is installed on the carrier frame, and the output shaft of the second tilt adjustment motor drives the hinge shaft located at the inner end of the second flip plate to rotate via a belt drive component. The outer end of the second flip plate is equipped with a second welding head.

[0015] The present invention also provides a welding method for manufacturing aircraft landing gear, which is based on the above-mentioned welding apparatus for manufacturing aircraft landing gear, and includes the following steps: S1. First, install the storage sleeve component and scraper seat on the outside of the cylindrical body of the buffer; start the mechanical jaws and the first vacuum pump in the workpiece clamping assembly, use two sets of clamping plates to clamp and lock the buffer, and make the cylindrical mounting block face down; first, attach the corresponding buckle component to the outer end of the cylindrical body, use the lifting push rod to adjust the position of the first welding mechanism, use the flip drive motor to drive the turntable and the first welding mechanism on it to rotate, the first welding mechanism uses the first tilt motor to adjust the tilt angle of the first welding head, and uses the first welding head to weld the butt joint circumferential seam between the connecting plate and the cylindrical body; S2. A first hinged lug is fitted on the outside of the snap fastener, so that the corresponding circumferential snap fastener is engaged in the first stepped snap groove; the first welding head is used to weld the butt joint circumferential seam between the first lug body and the cylindrical cylinder body; the second welding head is used to weld the butt joint circumferential seam between the adjacent collar and the cylindrical cylinder body. S3. The multi-functional welding assembly is reset. The buffer is rotated 180 degrees using the workpiece clamping assembly. The corresponding snap-fit ​​component is glued to the outer end of the cylindrical mounting block. The first welding head is used to weld the butt joint circumferential seam between the connecting plate and the cylindrical cylinder. The second welding head is used to weld the butt joint circumferential seam between the adjacent collar and the cylindrical cylinder. The first vacuum pump in the workpiece clamping assembly is turned off, changing the clamping lock of the buffer to a movement restriction. The external robot arm is used to twist the first hinge ear from below to drive the buffer to rotate around its own axis. The offset angle between the first hinge ear and the subsequently added second hinge ear is adjusted, and the circumferential relative angle between the scraper seat and the buffer is adjusted. The second welding head is used to weld the butt joint circumferential seam between the scraper seat body and the cylindrical cylinder. S4. A second hinged ear is fitted on the outside of the snap fastener, and the rack passes through the groove of the scraper seat and enters the rack storage cavity of the storage sleeve component, while the corresponding circumferential snap fastener is engaged in the second stepped snap groove; the first welding head is used to weld the butt joint circumferential seam between the second ear body and the cylindrical cylinder.

[0016] The beneficial effects of this invention are: 1. The welding device for aircraft landing gear production of this invention features a compact structure and high functional integration. Through the coordinated operation of the workpiece clamping assembly and the multi-functional welding assembly, it overcomes the technical shortcomings of traditional landing gear buffer welding fixtures, such as limited functionality, poor adaptability, low welding precision, and insufficient stability. The device incorporates an adaptive clamping and multi-angle welding adjustment structure. The workpiece clamping assembly can adaptably clamp the cylindrical body and movable rod of the buffer. Combining mechanical clamping and vacuum adsorption for dual fixation, it eliminates workpiece displacement and vibration during welding. Simultaneously, it can drive the workpiece to vertically flip and circumferentially rotate, eliminating the need for manual secondary disassembly and positioning, significantly simplifying the multi-process welding operation. The multi-functional welding assembly integrates two independently adjustable welding mechanisms, enabling precise multi-dimensional control of welding height, tilt angle, and circumferential position. It can complete the integrated welding of multiple components such as snap-fit ​​components, hinge lugs, storage sleeve components, and scraper seats in one operation, adapting to the welding assembly requirements of hinge lugs with different misalignment angles, effectively improving the integration level and processing efficiency of the welding process. The overall device is highly automated and has excellent positioning accuracy, which can effectively avoid problems such as weld seam offset, uneven welding, and assembly misalignment caused by manual welding, and significantly reduce the scrap rate. At the same time, the components of the device have strong stability and high fault tolerance, and can be adapted to the mass standardized welding production of aircraft landing gear buffers. Its applicability and practicality are significantly better than traditional welding tooling.

[0017] 2. The shock absorber workpiece processed by this invention differs from traditional landing gear shock absorbers in its structural configuration. It integrates the mechanical anti-detachment connection structure with the built-in linkage scraping structure, achieving automatic cleaning of impurities on the surface of the moving rod without the need for an additional independent drive mechanism. During the reciprocating extension and retraction motion of the shock absorber, the scraping component rotates synchronously driven by the displacement linkage of the second hinge lug, continuously removing dust and metal debris adhering to the outer wall of the moving rod, thus preventing impurities from entering the cylinder and causing extension and retraction jamming and eccentric wear problems from the source. At the same time, the hinge lug adopts a stepped groove and a snap-fit ​​component for pre-locking and limiting, and is then welded with a circumferential weld. Compared with the single outer peripheral weld welding method, this significantly improves the lug's resistance to displacement and cracking, and can adapt to the assembly and welding requirements of hinge lugs with different misalignment angles.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the buffer component in this invention; Figure 3 This is a schematic diagram of the structure of the buffer workpiece in this invention; Figure 4 This is a schematic diagram of the buffer structure in this invention; Figure 5 This is a schematic diagram of the snap-fit ​​component in this invention; Figure 6 This is a half-sectional schematic diagram of the first hinge lug in this invention; Figure 7 This is a schematic diagram of the structure of the second hinged lug in this invention; Figure 8 This is a structural schematic diagram of the storage sleeve component in this invention; Figure 9 This is a schematic diagram showing the installation positions of the scraping component and the transmission component in this invention; Figure 10 This is a schematic diagram of the ash scraper seat in this invention; Figure 11 This is a schematic diagram of the ash scraping component in this invention; Figure 12 This is a schematic diagram of the transmission component in this invention; Figure 13 This is a schematic diagram of the workpiece clamping assembly in this invention; Figure 14 This is a schematic diagram of the clamping plate in this invention; Figure 15 This is a schematic diagram of the structure of the multifunctional welding assembly in this invention; Figure 16 This is a schematic diagram of the composition of the first welding mechanism in this invention; Figure 17 This is a schematic diagram of the composition of the second welding mechanism in this invention; In the attached diagram, the components represented by each number are as follows: 1-Workpiece clamping assembly, 101-First base plate, 102-Rotary driver, 103-Screw support, 104-Screw, 105-Screw motor, 106-Carrier plate, 107-Mechanical gripper, 108-First vacuum pump, 109-Clamping plate, 110-T-connector, 111-Hose, 112-Arc-shaped adsorption chamber, 113-First adsorption hole; 2-Multifunctional welding assembly, 201-Second substrate, 202-Lifting push rod, 203-Columnar clamping seat, 204-Clamping groove, 205-Arch-shaped adsorption cavity, 206-Second adsorption hole, 207-Second suction pump, 208-Rotating seat, 209-Driven bevel gear, 210-Tilting drive motor, 211-Driven bevel gear, 212-Driven gear, 213-First flip plate, 214-First welding head, 215-Height adjustment push rod, 216-Carrier frame, 217-Second flip plate, 218-Second tilt adjustment motor, 219-Second welding head; 3-Buffer workpiece, 31-Buffer, 311-Cylindrical cylinder body, 312-Moving rod, 313-Oil injection pipe, 314-Cylindrical mounting block, 32-Snap-fit ​​component, 321-Connecting plate, 322-Circumferential snap-fit, 33-First hinge lug, 331-First lug body, 332-First lug, 333-First stepped snap groove, 34-Second hinge lug, 341-Second lug body, 342-Second lug, 343-Second stepped snap groove, 344-First protrusion, 345-Rack, 35-Receiving sleeve component, 351-Collecting sleeve 352-Collar, 353-Rack housing cavity, 36-Scraper seat, 361-Scraper seat body, 362-Second protrusion, 363-Positioning groove, 364-Upper clearance groove, 365-Scraper component movable groove, 366-Lower clearance groove, 367-Radial through groove, 368-Transmission component movable groove, 369-Through groove, 37-Scraper component, 371-Frustum, 372-Gear groove, 373-Cylindrical through groove, 374-Scraper screw blade, 38-Transmission component, 381-Transmission shaft, 382-Transmission bevel gear, 383-Transmission gear. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, this embodiment provides a welding device for aircraft landing gear production, including a workpiece clamping assembly 1 and a multi-functional welding assembly 2; the workpiece clamping assembly 1 is used to clamp and lock the buffer workpiece 3 to be processed, and can drive the buffer workpiece 3 to achieve vertical flipping; the multi-functional welding assembly 2 is mounted above the workpiece clamping assembly 1, and is used to complete multi-station welding operations on the clamped and fixed buffer workpiece 3. The multi-station welding operations include welding of the buckle components 32 at both ends of the buffer 31, welding of the hinge lug, welding of the storage sleeve component 35, and welding of the scraper seat 36.

[0023] like Figures 2-3 , Figure 9 As shown, the buffer component 3 includes a buffer 31, a snap-fit ​​component 32, a first hinge ear 33, a second hinge ear 34, a storage sleeve component 35, a scraper seat 36, a scraper component 37, and a transmission component 38. The scraper component 37 is movably assembled inside the scraper seat 36. The transmission component 38 is in transmission cooperation with the scraper component 37 and the second hinge ear 34 respectively, and can drive the scraper component 37 to run by relying on the structural linkage of the second hinge ear 34.

[0024] like Figure 4 As shown, the buffer 31 includes a cylindrical cylinder 311, a movable rod 312, an oil injection pipe 313, and a cylindrical mounting block 314. The oil injection pipe 313 is fixedly located on the periphery of the cylindrical cylinder 311 near one end. The movable rod 312 is telescopically mounted on the end of the cylindrical cylinder 311 away from the oil injection pipe 313. The cylindrical mounting block 314 is fixedly mounted on the outer end of the movable rod 312.

[0025] like Figure 6 As shown, the first hinge ear seat 33 is located at the outer end of the cylindrical cylinder body 311 near the oil injection pipe 313. The first hinge ear seat 33 includes a first ear seat body 331. The outer side of the first ear seat body 331 is provided with a first lug 332 with a hinge hole, and the inner side of the first ear seat body 331 is provided with a first stepped groove 333.

[0026] like Figure 7As shown, the second hinge ear 34 is located at the outer end of the cylindrical mounting block 314. The second hinge ear 34 includes a second ear body 341. The outer side of the second ear body 341 is provided with a second lug 342 with a hinge hole. The inner side of the second ear body 341 is provided with a second stepped groove 343. The outer periphery of the second ear body 341 is supported by a rack 345 via a first protrusion 344.

[0027] like Figure 5 As shown, the snap-fit ​​component 32 is composed of a connecting plate 321 and a circumferential snap-fit ​​322 located on its outer side.

[0028] like Figure 8 As shown, the storage sleeve component 35 includes a storage sleeve 351. Both ends of the storage sleeve 351 are provided with collars 352 that are sleeved on the outside of the cylindrical cylinder body 311. One end of the storage sleeve 351 is provided with a rack storage cavity 353.

[0029] like Figure 10 As shown, the scraper seat 36 includes a scraper seat body 361. A second protrusion 362 is provided on the outer periphery of the scraper seat body 361. The scraper seat body 361 is provided with a positioning groove 363, an upper clearance groove 364, a scraper component movable groove 365, and a lower clearance groove 366 from top to bottom. The diameter of the positioning groove 363 matches the outer diameter of the cylindrical cylinder 311. The diameters of the upper clearance groove 364 and the lower clearance groove 366 are both smaller than the outer diameter of the cylindrical cylinder 311 and larger than the outer diameter of the movable rod 312. The scraper seat body 361 has multiple radial through grooves 367 circumferentially provided on the side wall of the upper clearance groove 364. The second protrusion 362 has a transmission component movable groove 368 that matches the transmission component 38 and a through groove 369 that facilitates the passage of the rack 345. The two ends of the transmission component movable groove 368 are respectively connected to the scraper component movable groove 365 and the through groove 369.

[0030] like Figure 11 As shown, the scraping component 37 is restricted to movement within the scraping component movement groove 365. The scraping component 37 includes a frustum 371. A ring of toothed grooves 372 is provided on the outer side of the wide portion of the frustum 371. A cylindrical through groove 373 is provided inside the frustum 371. A scraping screw blade 374 is installed on the inner wall of the frustum 371 located in the cylindrical through groove 373. The scraping screw blade 374 has a scraping channel inside that matches the outer diameter of the movable rod 312.

[0031] like Figure 12 As shown, the transmission component 38 includes a transmission shaft 381. One end of the transmission shaft 381 is provided with a transmission bevel gear 382 that cooperates with the tooth groove 372 in the scraping component 37, and the other end of the transmission shaft 381 is provided with a transmission gear 383 that cooperates with the rack 345.

[0032] like Figures 13-14As shown, the workpiece clamping assembly 1 includes a first base plate 101, a rotary driver 102, a lead screw support 103, a lead screw 104, a lead screw motor 105, a carrier plate 106, a mechanical gripper 107, a first vacuum pump 108, a clamping plate 109, a three-way pipe 110, and a flexible hose 111. The first base plate 101 is supported by the lead screw support 103 via the rotary driver 102. The lead screw support 103 movably supports the lead screw 104. The lead screw motor 105 is mounted on the lead screw support 103. The lead screw motor 105 is connected to the lead screw 104 via a steering gear set. The lead screw 104 has two lead screw sections with opposite directions of rotation. Each lead screw section is fitted with a rotation-restricting carrier plate on its outer side. The plate 106 is equipped with a mechanical gripper 107 and a first vacuum pump 108. The mechanical gripper 107 has two clamping plates 109 that can move relative to each other. The clamping plates 109 have an arc-shaped adsorption cavity 112 inside. The inner arc surface of the clamping plates 109 is evenly distributed with first adsorption holes 113 that communicate with the arc-shaped adsorption cavity 112. The inner arc surfaces of the two sets of clamping plates 109 respectively cooperate with the outer diameter of the cylinder body 311 and the cylinder body 312. The suction end of the first vacuum pump 108 is connected to the exhaust branch of the three-way pipe 110. The two suction branches of the three-way pipe 110 are respectively connected to the arc-shaped adsorption cavity 112 of the corresponding clamping plate 109 through the hose 111.

[0033] The buffer component 3 is a landing gear shock-absorbing load-bearing component and is the part welded in this process. It relies on a nested telescopic structure to achieve shock absorption and cushioning, while also working with various auxiliary components to optimize the effects of preventing impurities, wear, and loosening. The buffer 31 body completes the shock absorption operation through the nested telescopic cooperation of the cylindrical cylinder 311 and the movable rod 312. The impact load generated by aircraft takeoff and landing can push the movable rod 312 into the cylindrical cylinder 311, thereby dissipating the impact energy and ensuring fuselage stability. The oil injection pipe 313 is used to inject buffer pressure oil to ensure the damping performance of the buffer telescopic mechanism. The cylindrical mounting block 314 provides an installation reference for the lower hinge structure. The latching components 32 at both ends are welded and fixed to the cylinder end via connecting plates 321. The outer circumferential latches 322 can be embedded into the stepped latch grooves of the hinge lugs, forming a front mechanical limiting structure, which, in conjunction with subsequent welding processes, achieves double fixation of the hinge lugs. The first hinge ear 33 and the second hinge ear 34 serve as the connection hubs between the two ends of the buffer 31 and the machine body and rocker arm, respectively. They achieve rotational hinges through their own hinge holes. The stepped grooves on their inner sides cooperate with the buckle components 32 to greatly improve the connection stability. The rack 345 on the outer periphery of the second hinge ear 34 provides the power transmission basis for the linkage operation of the subsequent ash scraping components 37.

[0034] The workpiece clamping assembly 1 provides a precise and stable foundation for workpiece fixation and posture adjustment throughout the entire welding process. It achieves precise workpiece positioning through three main functions: dual locking via mechanical clamping and vacuum adsorption, lead screw centering adjustment, and rotational / flipping adjustment. During operation, the lead screw motor 105 drives the bidirectional rotary lead screw 104 to rotate via a steering gear set, causing the two sets of carrier plates 106 to move synchronously relative to each other. This allows the mechanical grippers 107 on the carrier plates 106 to open and close. The two sets of clamping plates 109, each with a different outer diameter, respectively abut against the cylindrical cylinder 311 and the outer wall of the movable rod 312 of the clamping buffer 31, achieving initial mechanical positioning and fixation of the workpiece. Simultaneously, the first vacuum pump 108 draws air from the arc-shaped adsorption chamber 112 inside the clamping plate 109 through the three-way pipe 110 and the flexible hose 111. This creates a negative pressure adsorption force in the first adsorption hole 113 on the inner arc surface of the clamping plate 109, firmly adsorbing and locking the workpiece, completely eliminating micro-displacement of the workpiece caused by welding vibration, and ensuring the accuracy of the welding reference. After the single-sided welding process is completed, the rotary driver 102 can drive the lead screw support 103 and the overall clamping structure to rotate vertically, realize the workpiece posture switching, and meet the welding requirements of different parts at both ends of the workpiece. After the first vacuum pump 108 is turned off, the negative pressure adsorption is released, and the workpiece only retains the movement limit of the mechanical gripper 107. It can cooperate with the external robot to realize the circumferential rotation of the workpiece, accurately adjust the misalignment angle of the hinge ear seat and the circumferential position of the scraper seat 36, and meet the positioning requirements of multi-angle and multi-station welding.

[0035] like Figure 15 As shown, the multifunctional welding assembly 2 includes a second substrate 201. The second substrate 201 is supported by a cylindrical clamping seat 203 via a lifting push rod 202. The bottom side of the cylindrical clamping seat 203 has a clamping groove 204 that mates with a first lug 332 or a second lug 342. An arched adsorption cavity 205 is provided around the clamping groove 204 on the cylindrical clamping seat 203. A plurality of second adsorption holes 206 communicating with the arched adsorption cavity 205 are evenly distributed on the inner surface of the clamping groove 204. The cylindrical clamping seat 203 is embedded with... A second suction pump 207 is installed, and the suction end of the second suction pump 207 is connected to the arched adsorption chamber 205. A rotating seat 208 is movably sleeved on the lower outer side of the cylindrical clamping seat 203. A driven bevel gear 209 is provided on the upper part of the rotating seat 208. A flip drive motor 210 is installed on the outer side of the cylindrical clamping seat 203. An active bevel gear 211 that meshes with the driven bevel gear 209 is installed on the output end of the flip drive motor 210. A first welding mechanism and a second welding mechanism are symmetrically installed on the rotating seat 208.

[0036] like Figure 16As shown, the first welding mechanism includes a first tilting motor, a drive gear 212, a first flap 213, and a first welding head 214. The output end of the first tilting motor is equipped with the drive gear 212. The inner end of the first flap 213 is provided with an incomplete gear that meshes with the drive gear 212, and a positioning shaft passes through the center of the incomplete gear. The inner side of the outer end of the first flap 213 is equipped with the first welding head 214. like Figure 17 As shown, the second welding mechanism includes a height adjustment push rod 215, a carrier frame 216, a second flip plate 217, a second tilt adjustment motor 218, and a second welding head 219. The carrier frame 216 is installed on the movable end of the height adjustment push rod 215. The carrier frame 216 movably supports the second flip plate 217 through an ear seat. The second tilt adjustment motor 218 is installed on the carrier frame 216. The output shaft of the second tilt adjustment motor 218 drives the hinge shaft located at the inner end of the second flip plate 217 to rotate via a belt drive component. The second welding head 219 is installed on the outer end of the second flip plate 217.

[0037] The multi-functional welding assembly 2 primarily achieves automated and precise welding across multiple dimensions, angles, and workstations. Through coordinated adjustments of lifting, circumferential rotation, and tilting, it adapts to the welding operations of circumferential and butt welds on various components of the buffer 31. The lifting push rod 202 drives the cylindrical clamping seat 203 to rise and fall vertically as a whole, precisely adjusting the distance between the welding mechanism and the workpiece to meet the welding height requirements of workpieces of different sizes. The cylindrical clamping seat 203, through the bottom clamping groove 204, works in conjunction with the second suction pump 207, the arched adsorption chamber 205, and the second adsorption hole 206 to form a negative pressure clamping structure, which can stably clamp the lug structure of the positioning hinge lug, assisting in precise workpiece alignment. The rotation drive motor 210, through the meshing transmission of the active bevel gear 211 and the driven bevel gear 209, drives the rotating seat 208 and the two symmetrically installed welding mechanisms to rotate circumferentially, realizing the circumferential switching of the welding workstation. The first welding mechanism drives the active gear 212 to rotate via the first tilting motor, which in turn drives the first flip plate 213 to rotate via incomplete gear meshing transmission, precisely adjusting the welding tilt angle of the first welding head 214 to adapt to the fitting welding of the annular seam. The second welding mechanism achieves fine vertical height adjustment via the height adjustment push rod 215, and drives the second flip plate 217 to rotate via the second tilting motor 218 and belt drive assembly, completing the multi-angle tilt angle adjustment of the second welding head 219. The two welding mechanisms work together to complete the differentiated welding operations of the buckle component 32, the hinge ear, the storage sleeve 351, and the scraper seat 36, ensuring that the welds of each part are uniform and well-formed.

[0038] This embodiment also provides a welding method for manufacturing aircraft landing gear, including the following steps: S1. First, install the storage sleeve component 35 and the scraper seat 36 on the outside of the cylindrical cylinder 311 of the buffer 31; start the mechanical jaw 107 and the first vacuum pump 108 in the workpiece clamping assembly 1, use two sets of clamping plates 109 to clamp and lock the buffer 31, and make the cylindrical mounting block 314 face down; first, attach the corresponding buckle component 32 to the outer end of the cylindrical cylinder 311, use the lifting push rod 202 to adjust the position of the first welding mechanism, use the flip drive motor 210 to drive the turntable 208 and the first welding mechanism on it to rotate, the first welding mechanism uses the first tilt motor to adjust the tilt angle of the first welding head 214, and uses the first welding head 214 to weld the butt joint circumferential seam between the connecting plate 321 and the cylindrical cylinder 311; S2. A first hinged lug 33 is fitted on the outside of the snap fastener 32, so that the corresponding circumferential snap fastener 322 is engaged in the first stepped snap groove 333; the first welding head 214 is used to weld the butt joint circumferential seam between the first lug body 331 and the cylindrical cylinder 311; the second welding head 219 is used to weld the butt joint circumferential seam between the adjacent collar 352 and the cylindrical cylinder 311. S3. The multi-functional welding assembly 2 is reset. The buffer 31 is rotated 180 degrees using the workpiece clamping assembly 1. The corresponding snap fastener 32 is attached to the outer end of the cylindrical mounting block 314. The first welding head 214 is used to weld the butt joint circumferential seam between the connecting plate 321 and the cylindrical cylinder 311. The second welding head 219 is used to weld the butt joint circumferential seam between the adjacent collar 352 and the cylindrical cylinder 311. The first vacuum pump 108 in the workpiece clamping assembly 1 is turned off, changing the clamping lock of the buffer 31 to a movement restriction. The external robot arm is used to twist the first hinge ear 33 from below to drive the buffer 31 to rotate around its own axis. The offset angle between the first hinge ear 33 and the subsequently added second hinge ear 34 is adjusted. The circumferential relative angle between the scraper seat 36 and the buffer 31 is adjusted. The second welding head 219 is used to weld the butt joint circumferential seam between the scraper seat body 361 and the cylindrical cylinder 311. S4. A second hinged ear seat 34 is fitted on the outside of the buckle member 32, and the rack 345 passes through the through groove 369 of the scraper seat 36 and enters the rack storage cavity 353 of the storage sleeve member 35, while the corresponding circumferential buckle 322 is engaged in the second stepped buckle groove 343; the first welding head 214 is used to weld the butt joint circumferential seam between the second ear seat body 341 and the cylindrical cylinder body 311.

[0039] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding apparatus for manufacturing aircraft landing gear, characterized in that, Includes workpiece clamping components and multi-functional welding components; The workpiece clamping assembly is used to clamp and lock the buffer workpiece to be processed, and can drive the buffer workpiece to achieve vertical flipping. The multi-functional welding assembly is mounted above the workpiece clamping assembly and is used to perform multi-station welding operations on the clamped and fixed buffer workpiece. The multi-station welding operations include welding of the buckle components at both ends of the buffer, welding of the hinge ear seat, welding of the storage sleeve component and welding of the scraper seat. The buffer component includes a buffer, a snap-fit ​​component, a first hinged lug, a second hinged lug, a storage sleeve component, a scraper seat, a scraper component, and a transmission component. The scraper component is movably assembled inside the scraper seat. The transmission component is in transmission cooperation with the scraper component and the second hinged lug, respectively, and can drive the scraper component to run by relying on the structural linkage of the second hinged lug.

2. The welding apparatus for aircraft landing gear production according to claim 1, characterized in that, The buffer includes a cylindrical cylinder, a movable rod, an oil injection pipe, and a cylindrical mounting block; the oil injection pipe is fixedly located on the periphery of the cylindrical cylinder near one end, the movable rod is telescopically mounted on the end of the cylindrical cylinder away from the oil injection pipe, and the cylindrical mounting block is fixedly mounted on the outer end of the movable rod.

3. The welding apparatus for aircraft landing gear production according to claim 2, characterized in that, The first hinge ear is located at the outer end of the cylindrical cylinder near the oil injection pipe. The first hinge ear includes a first ear body. The outer side of the first ear body is provided with a first lug with a hinge hole, and the inner side of the first ear body is provided with a first stepped groove. The second hinge ear is located at the outer end of the cylindrical mounting block. The second hinge ear includes a second ear body. The outer side of the second ear body is provided with a second protrusion with a hinge hole. The inner side of the second ear body is provided with a second stepped groove. The outer periphery of the second ear body is supported by a rack via a first protrusion.

4. The welding apparatus for aircraft landing gear production according to claim 3, characterized in that, The buckle component consists of a connecting plate and a circumferential buckle located on its outer side; the storage sleeve component includes a storage sleeve, the two ends of which are provided with collars that are fitted onto the outer side of the cylindrical cylinder, and one end of the storage sleeve is provided with a rack storage cavity extending inward.

5. The welding apparatus for aircraft landing gear production according to claim 4, characterized in that, The scraper seat includes a scraper seat body. A second protrusion is provided on the outer periphery of the scraper seat body. The scraper seat body has a positioning groove, an upper clearance groove, a scraper component movable groove, and a lower clearance groove in sequence from top to bottom. The diameter of the positioning groove matches the outer diameter of the cylindrical cylinder. The diameters of the upper clearance groove and the lower clearance groove are both smaller than the outer diameter of the cylindrical cylinder and larger than the outer diameter of the movable rod. The scraper seat body has multiple radial through grooves along the circumferential direction on the side wall of the upper clearance groove. The second protrusion has a transmission component movable groove that matches the transmission component and a through groove that facilitates the rack to pass through. The two ends of the transmission component movable groove are respectively connected to the scraper component movable groove and the through groove.

6. The welding apparatus for aircraft landing gear production according to claim 5, characterized in that, The scraping component is restricted to moving within the scraping component movement groove. The scraping component includes a frustum. A toothed groove is provided on the outer side of the wide portion of the frustum. A cylindrical through groove is provided inside the frustum. A scraping screw is installed on the inner wall of the frustum located in the cylindrical through groove. The scraping screw has a scraping channel inside that matches the outer diameter of the moving rod.

7. The welding apparatus for aircraft landing gear production according to claim 6, characterized in that, The transmission component includes a transmission shaft, one end of which is provided with a transmission bevel gear that engages with the tooth groove in the scraping component, and the other end of which is provided with a transmission gear that engages with a rack.

8. The welding apparatus for aircraft landing gear production according to claim 7, characterized in that, The workpiece clamping assembly includes a first base plate, a rotary driver, a lead screw support, a lead screw, a lead screw motor, a carrier plate, mechanical grippers, a first vacuum pump, a clamping plate, a T-joint pipe, and a flexible hose. The first base plate is supported by the lead screw support via the rotary driver. The lead screw support movably supports the lead screw. The lead screw motor is mounted on the lead screw support and is connected to the lead screw via a steering gear set. The lead screw has two sections with opposite directions of rotation. Each lead screw section is fitted with a rotation-restricted carrier plate. A mechanical gripper and a first vacuum pump are mounted on the carrier plate. The mechanical gripper has two clamping plates that can move relative to each other. The clamping plates have an arc-shaped adsorption cavity inside. The inner arc surface of the clamping plates is evenly distributed with first adsorption holes that communicate with the arc-shaped adsorption cavity. The inner arc surfaces of the two sets of clamping plates are respectively matched with the outer diameter of the cylindrical cylinder and the cylinder of the movable rod. The suction end of the first vacuum pump is connected to the exhaust branch of the three-way pipe. The two suction branches of the three-way pipe are respectively connected to the arc-shaped adsorption cavity of the corresponding clamping plate through flexible hoses.

9. The welding apparatus for aircraft landing gear production according to claim 8, characterized in that, The multifunctional welding assembly includes a second base plate, on which a cylindrical clamping seat is supported by a lifting push rod. The bottom side of the cylindrical clamping seat has a clamping groove that mates with a first lug or a second lug. An arched adsorption cavity is provided around the clamping groove. A plurality of second adsorption holes communicating with the arched adsorption cavity are evenly distributed on the inner surface of the clamping groove. A second suction pump is embedded in the cylindrical clamping seat. The suction end of the second suction pump is communicating with the arched adsorption cavity. A rotating seat is movably sleeved on the lower outer side of the cylindrical clamping seat. A driven bevel gear is provided on the upper part of the rotating seat. A flip drive motor is installed on the outer side of the cylindrical clamping seat. An active bevel gear that meshes with the driven bevel gear is installed on the output end of the flip drive motor. A first welding mechanism and a second welding mechanism are symmetrically installed on the rotating seat. The first welding mechanism includes a first tilting motor, a drive gear, a first flap and a first welding head. The output end of the first tilting motor is equipped with a drive gear. The inner end of the first flap is provided with an incomplete gear that meshes with the drive gear and a positioning shaft passes through the center of the incomplete gear. The inner side of the outer end of the first flap is equipped with a first welding head. The second welding mechanism includes a height adjustment push rod, a carrier frame, a second flip plate, a second tilt adjustment motor, and a second welding head. The movable end of the height adjustment push rod is equipped with a carrier frame, and the carrier frame movably supports the second flip plate via an ear seat. The second tilt adjustment motor is installed on the carrier frame, and the output shaft of the second tilt adjustment motor drives the hinge shaft located at the inner end of the second flip plate to rotate via a belt drive component. The outer end of the second flip plate is equipped with a second welding head.

10. A welding method for manufacturing aircraft landing gear, implemented based on the welding apparatus for manufacturing aircraft landing gear as described in claim 9, characterized in that, Includes the following steps: S1. First, install the storage sleeve component and scraper seat on the outside of the cylindrical body of the buffer; start the mechanical jaws and the first vacuum pump in the workpiece clamping assembly, use two sets of clamping plates to clamp and lock the buffer, and make the cylindrical mounting block face down; first, attach the corresponding buckle component to the outer end of the cylindrical body, use the lifting push rod to adjust the position of the first welding mechanism, use the flip drive motor to drive the turntable and the first welding mechanism on it to rotate, the first welding mechanism uses the first tilt motor to adjust the tilt angle of the first welding head, and uses the first welding head to weld the butt joint circumferential seam between the connecting plate and the cylindrical body; S2. A first hinged lug is fitted on the outside of the snap fastener, so that the corresponding circumferential snap fastener is engaged in the first stepped snap groove; the first welding head is used to weld the butt joint circumferential seam between the first lug body and the cylindrical cylinder body; the second welding head is used to weld the butt joint circumferential seam between the adjacent collar and the cylindrical cylinder body. S3. The multi-functional welding assembly is reset. The buffer is rotated 180 degrees using the workpiece clamping assembly. The corresponding snap-fit ​​component is glued to the outer end of the cylindrical mounting block. The first welding head is used to weld the butt joint circumferential seam between the connecting plate and the cylindrical cylinder. The second welding head is used to weld the butt joint circumferential seam between the adjacent collar and the cylindrical cylinder. The first vacuum pump in the workpiece clamping assembly is turned off, changing the clamping lock of the buffer to a movement restriction. The external robot arm is used to twist the first hinge ear from below to drive the buffer to rotate around its own axis. The offset angle between the first hinge ear and the subsequently added second hinge ear is adjusted, and the circumferential relative angle between the scraper seat and the buffer is adjusted. The second welding head is used to weld the butt joint circumferential seam between the scraper seat body and the cylindrical cylinder. S4. A second hinged ear is fitted on the outside of the snap fastener, and the rack passes through the groove of the scraper seat and enters the rack storage cavity of the storage sleeve component, while the corresponding circumferential snap fastener is engaged in the second stepped snap groove; the first welding head is used to weld the butt joint circumferential seam between the second ear body and the cylindrical cylinder.

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