A positioning device for aircraft pipeline welding

Abstract

The present invention relates to the technical field of welding, in particular to a positioning device for aircraft pipeline welding, which includes a fixture component that clamps on the outer wall of the pipeline in the form of a clamp; a rotating component, which includes a main frame fixed to the fixture component. A gear set is arranged on the main frame, and a semi-circular toothed ring is meshed and connected to the outer wall of the gear set. The toothed ring is installed on the main board and drives the main board to rotate circumferentially around the pipeline; a power component, which includes a motor and a switching component. The switching component transmits the motor power to the fixture component and the rotating component in sequence; a welding component, which is installed on the back of the main board and rotates circumferentially together with the main board to achieve circumferential welding. This device accurately positions the pipeline through the jaws, and the motor drives components such as the friction ring and the gear disc to work together, so that the welding head accurately aligns with the weld seam and performs circumferential rotation welding. Compared with manual welding, it avoids welding deviations caused by factors such as hand tremors and space limitations.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly to a positioning device for aircraft pipeline welding. Background Art

[0002] When overhauling and repairing aircraft pipelines, due to the overall long length of the pipelines and limited installation space, it is impossible to disassemble all the pipelines and weld them mechanically. Therefore, maintenance personnel usually can only weld manually in the existing space. Although this method can meet the maintenance requirements to a certain extent, the welding effect is poor due to space and equipment limitations.

[0003] Especially when manual welding is carried out for circumferential welding in a narrow space, the following main problems exist: First, it is difficult to guarantee the welding precision. Due to space limitations, the operation of the welding personnel is restricted, and it is difficult to accurately control the circumferential welding position and angle, resulting in unstable welding quality. Second, the welding standards are inconsistent. The technical levels and experiences of different welding personnel are different, and there are differences in welding results, making it difficult to ensure the consistency of welding. In addition, manual welding has low efficiency, high labor intensity, and there are safety hazards when operating in a narrow space. Summary of the Invention

[0004] Therefore, the technical problems to be solved by the present invention are as follows: When manual circumferential welding is carried out in a narrow space, there are many problems. Space limitations restrict the operation of welding personnel, making it difficult to accurately control the welding position and angle, resulting in unstable welding quality. The differences in technical levels and experiences of different welding personnel make the welding results inconsistent. In addition, manual welding has low efficiency, high labor intensity, and there are safety hazards when operating in a narrow space.

[0005] The above technical problems are solved by the following technical solutions: The present invention provides a positioning device for aircraft pipeline welding, including a fixture component that clamps on the outer wall of the pipeline in the form of a clamp;

[0006] A rotating component, including a main frame fixed to the fixture component, a gear set is arranged on the main frame, a semi-circular toothed ring is meshed and connected to the outer wall of the gear set, the toothed ring is installed on the main board, and drives the main board to rotate circumferentially around the pipeline;

[0007] A power component, including a motor and a switching part, the switching part sequentially transmits the power of the motor to the fixture component and the rotating component;

[0008] A welding component, which is installed on the back of the main board and rotates circumferentially together with the main board to achieve circumferential welding.

[0009] In a preferred embodiment of the positioning device for aircraft pipeline welding of the present invention: the power component also includes a box body, a screw rod of the clamp component is rotatably arranged on the bottom surface of the box body, a rotating rod of the rotating component is arranged on the side surface of the box body, and the motor is respectively connected to the screw rod and the rotating rod through a switching member.

[0010] The switching member includes a friction ring, the lower surface of which is in contact with a gear plate sleeved on the screw, a spring pin is provided on the side of the gear plate, one end of which is inserted into the tooth gap of the outer wall of the gear plate, and the motor output tube is inserted into the annular groove at the upper end of the friction ring to drive the friction ring to rotate.

[0011] An output bevel gear is sleeved on the outer wall of the output cylinder, and the output bevel gear is meshed with an input bevel gear provided at one end of the rotating rod. An oblique groove is opened on the upper surface of the spring pin, and a straight rod is provided above the oblique groove. The upper end of the straight rod is located on the lower surface of the output bevel gear, which is used to push the output bevel gear to mesh with the input bevel gear.

[0012] The inner side wall of the hole of the output bevel gear is provided with two symmetrical arc grooves, and the outer wall of the output cylinder is provided with a protrusion, and the protrusion slides along the arc groove.

[0013] A spring sleeve rod is arranged between the output bevel gear and the friction ring, and the spring sleeve rod is locked after being retracted to a certain position. An extrusion rod is arranged on the side of the box body, and the extrusion rod unlocks the spring sleeve rod.

[0014] The clamp component includes a main body installed below the main frame, in which two symmetrical multi-link clamps are arranged, and a cross plate is arranged at the upper ends of the two multi-link clamps. The screw is screwed to the cross plate, and the lower end of the screw is connected to the main body through a bearing.

[0015] The main frame and the main board are connected by a keyway, and the slot on the main board is set to be semicircular, and the cross section of the convex key on the main frame is set to be T-shaped.

[0016] The gear set includes a first pinion connected to the rotating rod, two sets of intermediate large gears are symmetrically arranged about the first pinion, a second pinion is arranged on the other side of each intermediate large gear, and the first pinion and the second pinion are both meshed with the gear ring.

[0017] The welding component comprises a welding head installed on the back of the mainboard, and the welding head is connected to a welding machine through a pipeline.

[0018] The beneficial effects of the present invention are as follows: The device accurately positions the pipeline through the clamping jaws, and the motor drives components such as the friction ring and gear disc to work together, enabling the welding head to accurately align with the weld seam and perform circumferential rotation welding. Compared with manual welding, it avoids welding deviations caused by factors such as hand tremors and space limitations, significantly improves the welding accuracy and quality, ensures that the weld seam is uniform and firm, and meets the high requirements for welding quality of aircraft pipelines.

[0019] The device adopts a motor drive and a gear transmission system. From pipeline clamping to circumferential rotation welding of the welding head, the entire process requires no manual intervention, achieving automated welding. This not only reduces the manual operation steps, lowers the labor intensity, but also greatly shortens the welding time, improves the welding efficiency, and is especially suitable for scenarios such as aircraft pipelines that require frequent maintenance welding, effectively enhancing the overall efficiency of maintenance work.

[0020] The device is designed compactly with a small volume and can operate flexibly in the narrow space where the aircraft pipeline is located. The structural design of the clamping jaws and the welding head enables it to adapt to pipelines of different sizes and still accurately complete the welding task under space constraints. This flexibility makes the device have a wide application prospect in aircraft pipeline maintenance, solving the problem that traditional welding equipment is difficult to operate in narrow spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0022] Figure 1 is the overall structure schematic diagram of the present invention Figure 1 ;

[0023] Figure 2 is the overall structure schematic diagram of the present invention Figure 2 ;

[0024] Figure 3 is the overall structure schematic diagram of the present invention Figure 3 ;

[0025] Figure 4 is the schematic diagram of the internal structure of the power component of the present invention;

[0026] Figure 5 is Figure 4 the enlarged schematic diagram of the structure at A in

[0027] Figure 6 is the schematic diagram of the connection structure between the output bevel gear and the output cylinder.

[0028] In the figure:

[0029] 1. Fixture component; 11. Screw; 12. Main body; 13. Multi-link gripper; 14. Cross plate;

[0030] 2. Rotating component; 21. Main frame; 22. Gear set; 221. First pinion; 222. Intermediate large gear; 223. Second pinion; 23. Tooth ring; 24. Main board; 25. Rotating rod;

[0031] 3. Power component; 31. Motor; 311. Output cylinder; 3111. Ridge; 312. Output bevel gear; 3121. Arc groove; 313. Input bevel gear; 32. Switching part; 321. Friction ring; 3211. Annular groove; 322. Gear disc; 323. Spring pin; 3231. Inclined groove; 324. Straight rod; 325. Spring sleeve rod; 326. Extrusion rod; 33. Box body;

[0032] 4. Welding component; 41. Welding head; 42. Pipe. Detailed implementation mode

[0033] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific implementation mode and the accompanying drawings.

[0034] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention, but these terms may change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0035] Referring to Figures 1-6 , this embodiment provides a positioning device for aircraft pipe welding, including a fixture component 1 that clamps on the outer wall of the pipe in the manner of a clamp; a rotating component 2, including a main frame 21 fixed to the fixture component 1, a gear set 22 is arranged on the main frame 21, a semi-circular tooth ring 23 is meshed and connected to the outer wall of the gear set 22, the tooth ring 23 is installed on the main board 24, and drives the main board 24 to rotate circumferentially around the pipe 42; a power component 3, including a motor 31 and a switching part 32, the switching part 32 sequentially transmits the power of the motor 31 to the fixture component 1 and the rotating component 2; a welding component 4, which is installed on the back of the main board 24 and rotates circumferentially together with the main board 24 to achieve circumferential welding.

[0036] In this embodiment, the fixture component 1 is the foundation of the entire device. It is fixed to the outer wall of the pipe 42 by means of clamps. This design can ensure that the device is stably attached to the pipe 42 during the welding process and will not loosen due to the heat or vibration generated during welding. Further, the clamp structure of the fixture component 1 can be adjusted according to the size of the pipe 42 to adapt to pipes 42 with different diameters, ensuring the firmness and reliability of clamping.

[0037] The rotating component 2 includes a main frame 21 fixed to the fixture component 1. A gear set 22 is provided on the main frame 21. The outer wall of the gear set 22 is meshed and connected with a semi-circular toothed ring 23. The toothed ring 23 is installed on the main board 24. When the gear set 22 rotates, the toothed ring 23 will drive the main board 24 to rotate around the pipe 42 in a circle. This design enables the welding head 41 to perform circumferential welding along the outer wall of the pipe 42, ensuring the comprehensiveness and uniformity of welding. The design of the rotating component 2 cleverly utilizes the principle of gear transmission to achieve the precise rotation of the welding head 41.

[0038] The power component 3 includes a motor 31 and a switching piece 32. The motor 31 is the power source of the entire device, and the switching piece 32 is responsible for sequentially transmitting the power of the motor 31 to the fixture component 1 and the rotating component 2. When the device needs to clamp the pipe 42, the switching piece 32 transmits the power of the motor 31 to the fixture component 1, enabling the fixture component 1 to firmly clamp on the pipe 42. When welding is required, the switching piece 32 transmits the power of the motor 31 to the rotating component 2, driving the gear set 22 and the toothed ring 23 to rotate, thereby driving the main board 24 and the welding head 41 to rotate in a circle. This power transmission method enables the device to efficiently complete two key steps of clamping and welding.

[0039] The design of the welding component 4 enables the welding head 41 to rotate with the rotation of the main board 24, thereby realizing circumferential welding of the outer wall of the pipe. The welding component 4 generally includes a welding head 41 and related welding equipment, and can perform precise welding operations according to welding requirements.

[0040] The effects are as follows: (1) Improving welding accuracy and quality: With the precise clamping of the clamp component 1 and the stable rotation of the rotating component 2, the welding component 4 can accurately perform circumferential welding on the outer wall of the pipe. The coordinated cooperation of the gear set 22 and the gear ring 23 ensures the stability and accuracy of the welding process, avoids welding deviations caused by hand shaking or space limitations during manual welding, greatly improves the accuracy and quality of welding, ensures that the weld is symmetrical and stable, and meets the strict standards of aircraft pipe 42 for welding quality. (2) Achieving automated welding, speeding up and increasing efficiency: The design of the motor 31 and the switching component 32 in the power component 3 enables the entire welding process to be automated. From the clamping process of the pipe 42 to the circumferential rotation of the welding component 4, no manual intervention is required throughout the process, which significantly reduces the manual operation links and reduces the labor intensity. Automated operation not only improves welding efficiency, but also shortens welding time. It is especially suitable for scenes such as aircraft pipes 42 that require frequent maintenance and welding, and can effectively improve the overall efficiency of maintenance work. (3) Adapt to narrow spaces and enhance flexibility: The device is exquisitely designed and compact, and can operate flexibly in the narrow space where the aircraft pipe 42 is located. The structural layout of the clamp component 1 and the rotating component 2 enables it to adapt to pipes 42 of different sizes, and even in cramped spaces, it can accurately complete the welding task. This flexibility makes the device extremely potential for application in the field of aircraft pipe 42 maintenance, breaking the dilemma that traditional welding equipment is difficult to use in narrow spaces, and providing strong support for on-site maintenance of aircraft pipe 42.

[0041] Reference Figures 4-6 The power component 3 also includes a box body 33, on the bottom surface of which the screw 11 of the clamp component 1 is rotatably arranged, and on the side of the box body 33 a rotating rod 25 of the rotating component 2 is arranged, and the motor 31 is respectively connected to the screw 11 and the rotating rod 25 through a switching member 32.

[0042] It should be explained that the box 33 plays a key role in protecting and isolating the power component 3. Its internal structure is designed to protect key components such as the switching component 32, and prevent external factors from interfering with the operation of the switching component 32, thereby preventing power transmission failure. This design ensures the stability and reliability of power transmission and provides a basic guarantee for the normal operation of the entire device.

[0043] Reference Figures 4-6, the motor 31 is respectively drivingly connected to the screw rod 11 and the rotating rod 25 through the switching member 32. During the clamping stage, the power of the motor 31 is transmitted to the screw rod 11 of the clamping member 1 through the switching member 32, driving the screw rod 11 to rotate, thereby realizing the clamping action of the clamping member 1. During the welding stage, the switching member 32 switches the power of the motor 31 to the rotating rod 25 of the rotating member 2, driving the rotating rod 25 to rotate, driving the rotating member 2 to perform a circumferential rotation, and realizing the circumferential welding of the welding member 4. This design not only improves the efficiency of power transmission, but also reduces the complexity and cost of the equipment. Compared with using two motors 31 to control the clamping member 1 and the rotating member 2 respectively, this design is more fluent in cooperation, easier to operate, and improves the reliability and stability of the entire device.

[0044] In the automated operation of pipeline 42 welding, a reasonable power control method is crucial for ensuring welding quality and efficiency. Compared with using separate motors 31 to control the clamping member 1 and the rotating member 2 respectively, there are significant advantages in realizing the sequential transmission of the power of the motor 31 through the switching member 32. First, in terms of the fluency and synchronization of cooperation, the switching member 32 scheme realizes the sequential control and power switching of the clamping and welding actions through the switching member 32, ensuring seamless connection between the two actions and avoiding potential conflicts or interferences. The independent motor 31 scheme requires precise control of the start, stop and speed of the two motors 31. This not only requires complex control algorithms and precise sensor feedback, but also it is very difficult to ensure perfect synchronization between the two motors 31, which may lead to unstable clamping or reduced welding quality. Second, in terms of simplifying the control system and reducing costs, the switching member 32 scheme only requires one motor 31 and one switching member 32, greatly simplifying the complexity of the control system and reducing the costs of hardware and software. The independent motor 31 scheme requires two motors 31, two drivers, multiple sensors and complex control algorithms, increasing the hardware cost and the difficulty of software development and debugging. In addition, in terms of improving reliability and reducing maintenance costs, the switching member 32 scheme uses a mechanical switching mechanism, which has a simple structure, high reliability and relatively low maintenance costs. The independent motor 31 scheme requires the maintenance of two motors 31, two drivers and multiple sensors, and a failure of any one component may cause the entire system to break down. Finally, in terms of reducing volume and weight, the switching member 32 scheme only requires one motor 31, which can reduce the volume and weight of the entire device, making it more compact and portable. The independent motor 31 scheme requires two motors 31, which will increase the volume and weight of the entire device.

[0045] Specifically, taking the example of the technical solution, the switching part 32 solution also shows obvious advantages in terms of clamping force control and the rotation of the welding head 41. In terms of clamping force control, using the switching part 32 can ensure that the clamping force remains stable during the welding process. After clamping is completed, the switching part 32 locks the clamping mechanism to prevent the clamping force from loosening. While using the independent motor 31, it is necessary to continuously adjust the output of the clamping motor 31 to maintain the stability of the clamping force. In terms of the rotation of the welding head 41, using the switching part 32 can ensure that the welding head 41 starts to rotate only after clamping is completed, avoiding the collision of the welding head 41 with the pipeline 42 during the clamping process. While using the independent motor 31, it is necessary to precisely control the starting time of the two motors 31 to avoid collisions. To sum up, the switching part 32 solution realizes the sequential control, power switching, and decoupling of the clamping and welding actions through the switching part 32. It not only simplifies the control system, reduces costs, and improves reliability, but also reduces the volume and weight and avoids overconstraint. In contrast, the independent motor 31 solution requires complex control algorithms and precise sensor feedback to achieve similar functions, and has higher costs and lower reliability. Therefore, using the switching part 32 for power transmission is better than controlling each component with an individual motor 31 and is more suitable for application in automated equipment such as pipeline 42 welding that requires precise sequential operations.

[0046] Referring to Figures 4-6 , the switching part 32 includes a friction ring 321. The lower surface of the friction ring 321 is in contact with a gear disk 322 sleeved on the screw 11. A spring pin 323 is arranged on the side surface of the gear disk 322. One end of the spring pin 323 is inserted into the tooth gap on the outer wall of the gear disk 322. The output cylinder 311 of the motor 31 is inserted into the annular groove 3211 at the upper end of the friction ring 321 for driving the friction ring 321 to rotate. An output bevel gear 312 is sleeved on the outer wall of the output cylinder 311. The output bevel gear 312 meshes with an input bevel gear 313 arranged at one end of the rotating rod 25. An inclined groove 3231 is formed on the upper surface of the spring pin 323, and a straight rod 324 is arranged above the inclined groove 3231. The upper end of the straight rod 324 is located on the lower surface of the output bevel gear 312 for pushing the output bevel gear 312 to mesh with the input bevel gear 313.

[0047] It should be noted that the output cylinder 311 of the motor 31 is inserted into the annular groove 3211 at the upper end of the friction ring 321. This connection method is a keyway fit. The design purpose of the output cylinder 311 of the motor 31 is to adapt to the internal screw 11 to ensure that the screw 11 can smoothly move up and down in the output cylinder 311. At the same time, since the output cylinder 311 of the motor 31 and the annular groove 3211 of the friction ring 321 are in keyway fit, the output cylinder 311 of the motor 31 can drive the friction ring 321 to rotate when it rotates, and the friction ring 321 can also move up and down along the output cylinder 311. The lower surface of the friction ring 321 is in contact with the gear disk 322 sleeved on the screw 11. This contact relationship enables the friction ring 321 to rotate by the rotation of the gear disk 322. A spring pin 323 is arranged on the side surface of the gear disk 322, and one end of the spring pin 323 is inserted into the tooth gap on the outer wall of the gear disk 322. The main function of this design is that when the gear disk 322 rotates, the spring pin 323 will be extruded out of the tooth gap, and then drive the lifting movement of the output bevel gear 312 through the action of the straight rod 324, so as to realize the contact or separation from the input bevel gear 313. This lifting movement is a key link in the working process of the switching member 32, which ensures the power switching between the fixture member 1 and the rotating member 2. The screw 11 and the cross plate 14 are in a screwed connection relationship, which means that a particularly tight lock is not required during the working process of the switching member 32. The spring pin 323 will re-insert into the tooth gap after the gear disk 322 stops rotating, playing a limiting role to ensure the stability of the system during the working state. Although the spring pin 323 provides a certain locking function, it does not rely on it for complete locking. Such a design makes the switching member 32 more flexible during the operation process and also reduces the complex requirements for the locking mechanism.

[0048] Refer to Figure 6 , on the inner side wall of the hole of the output bevel gear 312, there are two symmetric arc-shaped grooves 3121, and on the outer wall of the output cylinder 311, there are protrusions 3111, and the protrusions 3111 slide along the arc-shaped grooves 3121.

[0049] It should be noted that since the output cylinder 311 is inserted into the annular groove 3211 of the friction ring 321, it directly drives the friction ring 321 to rotate. At the same time, the rotation of the output cylinder 311 drives the protrusions 3111 to move. After the protrusions 3111 move to either end of the arc-shaped groove 3121, they drive the output bevel gear 312 to rotate. This setting is to ensure that when the motor 31 starts to rotate, it first drives the friction ring 321 and then drives the output bevel gear 312, so as to drive the fixture member 1 to move first and disconnect the connection with the rotating member 2, ensuring that only the fixture member 1 is driven to move in the early stage.

[0050] Refer to Figure 4, a spring sleeve rod 325 is arranged between the output bevel gear 312 and the friction ring 321. The spring sleeve rod 325 is locked after shrinking to a certain position. An extrusion rod 326 is arranged on the side of the box body 33, and the extrusion rod 326 unlocks the spring sleeve rod 325.

[0051] It should be explained that the function of the spring sleeve rod 325 is to drive the friction ring 321 to rise synchronously when the output bevel gear 312 rises, separate the friction ring 321 from the gear disk 322, and disconnect the control of the fixture component 1. In the initial state, the output bevel gear 312 meshes with the input bevel gear 313, the friction ring 321 contacts the gear disk 322, and the spring sleeve rod 325 extends and unfolds; when the friction ring 321 drives the gear disk 322 to rotate and extrudes the spring pin 323, the output bevel gear 312 descends, the spring sleeve rod 325 descends and compresses the internal spring, and at the same time the internal bolt descends to achieve plug-in locking. The spring sleeve rod 325 shrinks and locks. After that, when the gear disk 322 stops rotating, the spring pin 323 resets, and the output bevel gear 312 drives the friction ring 321 to rise through the locked spring sleeve rod 325 to achieve power switching; when the welding is completed, press the outer extrusion rod 326, and the extrusion rod 326 pushes the bolt on the spring sleeve rod 325 to unlock, so that the spring sleeve rod 325 separates the output bevel gear 312 from the friction ring 321 and returns to the initial state. After that, the motor 31 drives the gear disk 322 through the friction ring 321 to unlock the fixture component 1, and the device is removed from the pipeline 42. When using it again, press the extrusion rod 326 again for reset.

[0052] Refer to Figures 1-4 , the fixture component 1 includes a main body 12 installed below the main frame 21. Two symmetrical multi-link jaws 13 are arranged in the main body 12. A cross plate 14 is arranged at the upper ends of the two multi-link jaws 13. The screw rod 11 is screwed to the cross plate 14, and the lower end of the screw rod 11 is connected to the main body 12 through a bearing.

[0053] It should be noted that the screw rod 11 drives the cross plate 14 to move up and down. The cross plate 14 is installed at the upper ends of the multi-link jaws 13. The multi-link jaws 13 are composed of two continuously connected end-to-end links. The lowermost link clamps the pipeline 42, and the upper link is bent and fixed to the main body 12 through a rotating shaft. The lowermost link is also hinged to the main body 12 through another link. In this way, when passing through the position of the cross plate 14, it can directly drive the lowermost link to deform, so as to realize the clamping of the fixture component 1.

[0054] Refer to Figures 1-4The main frame 21 and the main board 24 are connected by a keyway, and the slot on the main board 24 is set to be semicircular, and the cross section of the convex key on the main frame 21 is set to be T-shaped. The gear set 22 includes a first pinion 221 connected to the rotating rod 25, and two sets of intermediate large gears 222 are symmetrically arranged about the first pinion 221. A second pinion 223 is arranged on the other side of each intermediate large gear 222, and the first pinion 221 and the second pinion 223 are both meshed with the gear ring 23.

[0055] The main frame 21 is provided with a convex key, and the main board 24 is provided with a groove, and the convex key is inserted into the groove, so that when the gear set 22 installed on the main frame 21 drives the gear ring 23 to rotate, the gear ring 23 drives the main board 24 fixedly connected thereto to rotate along the key groove track, thereby realizing the main board 24 to perform a circular rotation on the main frame 21. The three pinion gears are set to open the spacing to ensure that when the gear ring 23 rotates to any position, there are always one or two pinion gears in contact with it and can drive it to rotate. The large gear is set to transmit power to each pinion gear to ensure that the pinion gears rotate synchronously.

[0056] Reference Figures 1-4 The welding component 4 includes a welding head 41 installed on the back of the main board 24, and the welding head 41 is connected to a welding machine through a pipeline 42.

[0057] It should be noted that the welding component 4 is composed of a welding head 41 and a welding machine. The welding head 41 is installed on the back of the main board 24 and is connected to the welding machine through a pipe 42. The welding head 41 is responsible for the actual welding work, and the welding machine provides the energy and materials required for welding. This design enables the welding head 41 to perform circumferential welding as the main board 24 rotates, and at the same time obtains the required welding resources from the welding machine through the pipe 42, ensuring the continuity and stability of the welding process.

[0058] Reference Figures 1-6, first place the jaws on the pipe 42, and then move the position of the jaws until the welding head 41 is directly above the weld seam. At this time, start the motor 31. The motor 31 drives the friction ring 321 to rotate through the output cylinder 311. Since the friction ring 321 is in contact with the gear disk 322 at this time, the gear disk 322 is driven to rotate. The rotation of the gear disk 322 drives the screw 11 to rotate. At the same time, the rotation of the gear disk 322 also squeezes out the spring pin 323 inserted in the outer tooth gap thereof. The outward movement of the spring pin 323 causes the straight rod 324 on the inclined groove 3231 to descend. The descent of the straight rod 324 causes the output bevel gear 312 at its upper end to descend, so that the output bevel gear 312 is separated from the input bevel gear 313. At the same time, the spring sleeve rod 325 between the output bevel gear 312 and the friction ring 321 contracts and locks. The rotation of the screw 11 drives the cross plate 14 to move up and down. The cross plate 14 drives the two multi-link jaws 13 symmetrically arranged on the left and right to deform, so as to clamp the pipe 42. When the pipe 42 is clamped, the gear disk 322 cannot rotate. At this time, the spring pin 323 automatically re-inserts into the tooth gap of the gear disk 322, and the inclined groove 3231 pushes the straight rod 324 to move up, so as to move the output bevel gear 312 up. The output bevel gear 312 drives the friction ring 321 to move up through the spring sleeve rod 325, so that the friction ring 321 is separated from the gear disk 322, and the output bevel gear 312 meshes with the input bevel gear 313. Furthermore, the motor 31 drives the output bevel gear 312 to rotate through the output cylinder 311. The output bevel gear 312 drives the input bevel gear 313 to rotate. The input bevel gear 313 drives the rotating rod 25 to rotate. The rotating rod 25 drives the first small gear 221 to rotate. The first small gear 221 drives the middle transfer large gears 222 on both sides to rotate. The middle transfer large gears 222 on both sides drive the second small gears 223 on their respective other sides to rotate. Thus, under the combined action of the first small gear 221 and the two second small gears 223, the toothed ring 23 meshing with them rotates. The toothed ring 23 drives the main board 24 to rotate on the main frame 21, so that the welding head 41 installed on the back of the main board 24 rotates in a circle. Furthermore, the welding head 41 rotates in a circle at the weld seam for welding, realizing fully automatic welding. After the welding is completed, press the extrusion rod 326 to unlock the spring sleeve rod 325, so that the output bevel gear 312 and the friction ring 321 are reset.

[0059] Finally, it should be pointed out that the methods and devices described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A positioning device for aircraft pipeline welding, characterized in that: including, a fixture component (1) that clamps onto the outer wall of a pipeline in a clamp-like manner; a rotating component (2) including a main frame (21) fixed to the fixture component (1). A gear set (22) is provided on the main frame (21), and a semi-circular toothed ring (23) is meshed and connected to the outer wall of the gear set (22). The toothed ring (23) is installed on a main board (24) to drive the main board (24) to rotate circumferentially around the pipeline; a power component (3) including a motor (31) and a switching piece (32). The switching piece (32) sequentially transmits the power of the motor (31) to the fixture component (1) and the rotating component (2); a welding component (4) installed on the back of the main board (24) and rotating circumferentially together with the main board (24) to achieve circumferential welding. The power component (3) further includes a box body (33). A screw rod (11) of the fixture component (1) is rotatably provided on the bottom surface of the box body (33), and a rotating rod (25) of the rotating component (2) is provided on the side surface of the box body (33). The motor (31) is in transmission connection with the screw rod (11) and the rotating rod (25) respectively through the switching piece (32). The switching piece (32) includes a friction ring (321). The lower surface of the friction ring (321) is in contact with a gear disk (322) sleeved on the screw rod (11). A spring pin (323) is provided on the side surface of the gear disk (322). One end of the spring pin (323) is inserted into the tooth gap on the outer wall of the gear disk (322). The output cylinder (311) of the motor (31) is inserted into an annular groove (3211) at the upper end of the friction ring (321) to drive the friction ring (321) to rotate. An output bevel gear (312) is sleeved on the outer wall of the output cylinder (311). The output bevel gear (312) is meshed with an input bevel gear (313) provided at one end of the rotating rod (25). An inclined groove (3231) is provided on the upper surface of the spring pin (323), and a straight rod (324) is provided above the inclined groove (3231). The upper end of the straight rod (324) is located on the lower surface of the output bevel gear (312) to push the output bevel gear (312) to mesh with the input bevel gear (313). A spring sleeve rod (325) is provided between the output bevel gear (312) and the friction ring (321). The spring sleeve rod (325) locks after shrinking to a certain position. An extrusion rod (326) is provided on the side surface of the box body (33) to unlock the spring sleeve rod (325).

2. The positioning device for aircraft pipeline welding according to claim 1, wherein: Symmetric two-segment arc grooves (3121) are provided on the inner side wall of the hole of the output bevel gear (312), and a protrusion (3111) is provided on the outer wall of the output cylinder (311). The protrusion (3111) slides along the arc groove (3121).

3. The positioning device for aircraft pipeline welding according to claim 1, wherein: The fixture component (1) includes a main body (12) installed below the main frame (21). Inside the main body (12), there are two symmetric multi-link jaws (13). At the upper ends of the two multi-link jaws (13), there is a cross plate (14). The screw rod (11) is screwed to the cross plate (14), and the lower end of the screw rod (11) is connected to the main body (12) through a bearing.

4. The positioning device for aircraft pipeline welding according to claim 1, characterized in that: Between the main frame (21) and the main board (24), there is a keyway connection, and the groove on the main board (24) is semicircular. The cross-section of the convex key on the main frame (21) is T-shaped.

5. The positioning device for aircraft pipeline welding according to claim 1, characterized in that: The gear set (22) includes a first small gear (221) connected to the rotating rod (25). There are two sets of intermediate large gears (222) symmetrically arranged with respect to the first small gear (221). On the other side of each intermediate large gear (222), there is a second small gear (223). Both the first small gear (221) and the second small gear (223) are meshed with the toothed ring (23).

6. The positioning device for aircraft pipeline welding according to claim 1, wherein: The welding component (4) includes a welding head (41) installed on the back of the main board (24). The welding head (41) is connected to a welding machine through a pipeline (42).

Images