High-precision welding device for annular seam of aviation pipeline parts
By using a quick-release protection mechanism and a counterweight mechanism, the problems of cumbersome replacement of laser welding gun protective lenses and optical path contamination have been solved, achieving an efficient and stable welding process and improving the circumferential welding accuracy of aerospace pipeline parts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHAANXI QINYU XINGHUA MASCH MFG CO LTD
- Filing Date
- 2026-06-15
- Publication Date
- 2026-07-21
AI Technical Summary
The replacement process for the protective lens of existing laser welding guns is cumbersome, and the internal optical path area of the welding gun is easily contaminated by dust and impurities during disassembly, affecting welding accuracy and stability.
The system employs a quick-release protection mechanism and a counterweight mechanism. The quick-release protection mechanism uses magnetorheological fluid and the opposite magnetic field of a magnet to achieve seamless disassembly and closure of the mounting bracket. The counterweight mechanism uses an adjustable counterweight to improve the stability of holding the welding torch.
The process of replacing the protective lens has been simplified, preventing dust from entering the welding torch, improving welding accuracy and stability, and enhancing the adaptability and ease of operation of the welding torch.
Smart Images
Figure CN122425375A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of laser welding technology, specifically to a high-precision welding device for circumferential seams of aerospace pipeline components. Background Technology
[0002] Aviation pipelines are responsible for transporting airborne fuel, lubricating oil, and gaseous media. Their circumferential welding has stringent industry standards for forming accuracy, weld consistency, and airtightness. Handheld laser welding guns, due to their flexible operation and concentrated heat input, are suitable for circumferential welding scenarios in complex spaces and for pipelines of various specifications. The protective lens is set on the optical transmission path of the laser welding gun and is a key component to ensure high-precision laser output. It can block spatter, fumes, and external impurities generated during the welding process from entering the optical path system, ensuring that the propagation path of the laser beam is not disturbed, maintaining a stable spot shape and uniform energy distribution, and providing stable laser energy output conditions for high-precision welding of circumferential seams in aviation pipelines.
[0003] In existing technologies, the protective components of laser welding torches typically consist of a mounting bracket and a protective lens. The mounting bracket is fixed to the welding torch body with bolts. During frequent use of the welding torch, the protective lens needs to be disassembled and replaced periodically. However, the bolted connection structure requires repeated operation of the fasteners each time the torch is disassembled and reassembled, resulting in low operational convenience. Furthermore, after the mounting bracket is removed, the welding torch mounting position is directly exposed to the air. Operators need to spend some time applying a sticker to the welding torch at the corresponding mounting bracket position to prevent dust from entering the welding torch. However, this process is cumbersome and inefficient. More importantly, during the sticker application process, the internal optical path area of the welding torch lacks effective protection, making it easy for dust and impurities to be introduced, which can interfere with the laser transmission path and thus affect the output accuracy and operational stability of the welding torch. Summary of the Invention
[0004] To address the problems in the prior art, this invention provides a high-precision welding device for circumferential seams of aerospace piping components.
[0005] The technical solution adopted by the present invention to solve its technical problem is: a high-precision welding device for circumferential seams of aviation pipeline parts, including a welding torch, a counterweight mechanism for providing stability to the welding torch is provided on the bottom side of the welding torch, a mounting frame is slidably connected to the welding torch, and a quick-release protection mechanism is provided on the welding torch at a position adjacent to the mounting frame. The quick-release protection mechanism is used to provide closed protection for the position of the welding torch corresponding to the mounting frame when the mounting frame is removed. The quick-release protection mechanism includes two guide slots and a mounting slot. A secondary magnet is fixedly connected to one side of the mounting slot, and a water bladder is fixedly connected to the side of the secondary magnet. The water bladder is filled with magnetorheological fluid. A positioning plate is slidably connected to one side of the mounting slot corresponding to the water bladder. Two guide blocks are fixedly connected to the positioning plate. A main magnet is rotatably connected to one end of the positioning plate via a shaft. Symmetrically arranged linkage seats are slidably connected to the positioning plate. T-shaped blocks are slidably connected to each linkage seat. Symmetrical hinge seats are fixedly connected to the shaft of the main magnet. A main magnetic block is fixedly connected to the top position of each linkage seat inside the positioning plate, and a secondary magnetic block is fixedly connected to the top of each linkage seat.
[0006] Specifically, the counterweight mechanism includes a placement box with multiple placement slots. Each placement slot has a symmetrically arranged anti-slip pad fixedly connected inside, and two of the placement slots have counterweight blocks slidably connected to them.
[0007] Specifically, the placement box is fixedly connected to the bottom side wall of the welding torch, the anti-slip pads are all made of rubber, and the outer wall of the counterweight blocks abuts against the corresponding anti-slip pads.
[0008] Specifically, the mounting groove is opened on the welding torch at the position corresponding to the mounting bracket, and the guide groove is symmetrically opened on the welding torch at the position corresponding to the mounting groove. The guide grooves are all in communication with the mounting groove.
[0009] Specifically, one side of the secondary magnet is designated as the south pole, and the position of the main magnet corresponding to the south pole of the secondary magnet is designated as the north pole. The magnetorheological fluid is in a hardened state due to the opposite magnetic field between the main magnet and the secondary magnet. The water bladder is movably connected inside the mounting groove and is elastic. The bottom of the main magnetic blocks is designated as the north pole, and the top of the secondary magnetic blocks is designated as the south pole. The main magnetic blocks and the corresponding secondary magnetic blocks are connected by opposite magnetic attraction.
[0010] Specifically, the side corners of the mounting bracket are inclined, the bottom corner of the positioning plate abuts against the inclined position of the mounting bracket, the top of each linkage seat slides through the corresponding main magnetic block and is fixedly connected to the top wall of the positioning plate with a connecting plate, and each hinge seat is hinged to the corresponding T-shaped block.
[0011] The beneficial effects of this invention are: The quick-release structure of the mounting bracket and the instant sealing structure of the mounting position are integrated and linked. The disassembly action of the mounting bracket and the sealing action of the mounting position are triggered simultaneously, achieving a seamless connection effect of removal and sealing without additional operation or waiting time. This solves the problem in the prior art that the sticker application process when replacing the protective lens can easily expose the optical path area inside the welding torch to the air. During the disassembly of the mounting bracket, the sealing mechanism moves synchronously with the removal of the mounting bracket, quickly sealing the opening of the welding torch mounting position. There is no need for manual application of additional protective stickers or secondary protection operations, saving preparation and processing time for sealing stickers, greatly improving the convenience and efficiency of protective lens replacement. At the same time, it basically blocks the channel for dust and impurities to enter the optical path inside the welding torch, avoiding interference with the laser transmission path, spot shape shift and uneven energy distribution caused by optical path contamination, ensuring long-term high-precision and stable operation of the welding torch. Enhanced welding torch grip stability and adaptability; the bottom counterweight mechanism allows for flexible addition or removal of counterweights to accommodate different operators' gripping habits, optimizes the welding torch's center of gravity distribution, reduces hand tremors, and improves circumferential welding accuracy. Existing technologies rely on bolts to fix the mounting bracket and protective lens. During welding, the continuous vibration of the welding torch can easily cause the bolts to loosen, resulting in a loose or misaligned protective lens, affecting the stability of the laser beam and welding accuracy. This invention, however, uses magnetorheological fluid hardening to achieve a rigid lock between the positioning plate and the mounting bracket. Relying on the magnetic field, a stable holding force is formed, unaffected by vibration. This avoids the problems of loosening or shifting the protective lens, ensuring accurate positioning and reliable fixation of the protective lens during welding. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 This is a front view provided for the present invention; Figure 2 The structural diagram of the counterweight mechanism provided by this invention; Figure 3 This is a structural diagram showing the separation of the mounting bracket and welding torch provided by the present invention; Figure 4 This is a structural diagram showing the separation of the positioning plate and the mounting groove provided by the present invention; Figure 5 This is a structural diagram of the side end of the positioning plate provided by the present invention, with the section removed. Figure 6 This invention provides a structural diagram showing the connection between the linkage seat, the T-shaped block, and the hinge seat. Figure 7 A cross-sectional view of the water bladder provided by the present invention; Figure 8 This is a structural diagram of the secondary magnetic block after it is separated from the main magnetic block, as provided by the present invention.
[0014] In the diagram: 1. Welding torch; 2. Counterweight mechanism; 21. Placement box; 22. Placement slot; 23. Anti-slip mat; 24. Counterweight block; 3. Mounting bracket; 4. Quick-release protection mechanism; 41. Guide slot; 42. Mounting slot; 43. Secondary magnet; 44. Water bladder; 45. Magnetorheological fluid; 46. Positioning plate; 47. Guide block; 48. Main magnet; 49. Linkage seat; 50. T-block; 51. Hinge seat; 52. Main magnet; 53. Secondary magnet. Detailed Implementation
[0015] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0016] Please see Figures 1 to 8 The present invention provides the following technical solutions: Example 1: A high-precision welding device for circumferential seams of aviation pipeline parts, including a welding torch 1, a mounting frame 3 slidably connected to the welding torch 1, and a quick-release protection mechanism 4 provided on the welding torch 1 at a position adjacent to the mounting frame 3. The quick-release protection mechanism 4 is used to provide closed protection for the position of the welding torch 1 corresponding to the mounting frame 3 when the mounting frame 3 is removed. The quick-release protection mechanism 4 includes two guide grooves 41 and a mounting groove 42. A secondary magnet 43 is fixedly connected to one side of the mounting groove 42. A water bladder 44 is fixedly connected to the side end of the secondary magnet 43. The water bladder 44 is filled with magnetorheological fluid 45. A positioning plate 46 is slidably connected to one side of the mounting groove 42 corresponding to the water bladder 44. Two guide blocks 47 are fixedly connected to the positioning plate 46. A main magnet 48 is rotatably connected to one end of the positioning plate 46 via a shaft. A symmetrically arranged linkage seat 49 is slidably connected to the positioning plate 46. A T-shaped block 50 is slidably connected to each linkage seat 49. A symmetrical hinge seat 51 is fixedly connected to the shaft of the main magnet 48. A main magnetic block 52 is fixedly connected to the top position of the linkage seat 49 inside the positioning plate 46. A secondary magnetic block 53 is fixedly connected to the top of the linkage seat 49. Mounting slot 42 is opened on welding torch 1 at the position corresponding to mounting bracket 3. Guide slots 41 are symmetrically opened on welding torch 1 at the position corresponding to mounting slot 42. Guide slots 41 are all connected to mounting slot 42. One side of auxiliary magnet 43 is set as south pole, and the position of main magnet 48 corresponding to the south pole of auxiliary magnet 43 is set as north pole. Magnetorheological fluid 45 is in a hardened state due to the opposite magnetic field between main magnet 48 and auxiliary magnet 43. Water bag 44 is movably connected inside mounting slot 42. Water bag 44 is elastic. The bottom of main magnetic block 52 is set as north pole, and the top of auxiliary magnetic block 53 is set as south pole. Main magnetic block 52 and corresponding auxiliary magnetic block 53 are connected by opposite magnetic attraction. The side corners of mounting bracket 3 are inclined. The bottom corner of positioning plate 46 abuts against the inclined position of mounting bracket 3. The top of linkage seat 49 slides through the corresponding main magnetic block 52 and the top wall of positioning plate 46 and is fixedly connected to the connecting plate. Hinged seat 51 is hinged to the corresponding T-block 50. In use, the welding torch 1 can be connected to an external laser generator, a water chiller, and a protective gas circuit. Then, the welding torch 1 can be activated so that the torch head aligns with the circumferential seam of the aerospace piping component for welding. The welding torch 1 utilizes existing, mature technology, and its operating principle is common knowledge to those skilled in the art, so it will not be elaborated upon here. During welding, the opposing magnetic fields between the main magnet 48 and the auxiliary magnet 43 cause the magnetorheological fluid 45 in the water bladder 44 to harden and expand. The rigid magnetorheological fluid 45 and the water bladder 44 provide rigid support to one side of the positioning plate 46, while the other side of the positioning plate 46 abuts against the mounting bracket 3, firmly fixing the mounting bracket 3 inside the welding torch 1. When it is necessary to replace the protective lens inside the welding torch 1, the connecting plate at the top of the two linkage seats 49 can be pressed. At this time, the two... The linkage seat 49 will actively move downwards under external force. This downward movement of the linkage seat 49 will cause the auxiliary magnet 53 to actively separate from the main magnet 52, while the position of the main magnet 52 remains unaffected. Simultaneously, the linkage seat 49 will also cause the T-shaped block 50 to move downwards. This downward movement of the T-shaped block 50 will cause the main magnet 48 to rotate via the hinge seat 51. During the rotation of the main magnet 48, the T-shaped block 50 will also move laterally within the linkage seat 49, providing space for the rotation of the main magnet 48. After both linkage seats 49 have moved downwards, the main magnet 48 will rotate 90° clockwise. At this point, the opposite magnetic field between the main magnet 48 and the auxiliary magnet 43 disappears, and the magnetorheological fluid 45 will rapidly change from a near-solid state to a liquid state, softening the water bladder 44. At this point, the mounting bracket 3 can be directly lifted upwards and installed. As the mounting bracket 3 moves upward and its tilted position is adjusted, it compresses the corners of the positioning plate 46. This compression causes the positioning plate 46 to move towards the water bladder 44, allowing it to slide within the mounting groove 42. Simultaneously, the positioning plate 46 also drives the guide block 47 to slide within the guide groove 41. The moving positioning plate 46 further compresses the water bladder 44. At this point, the positioning plate 46 is displaced, and the mounting bracket 3 successfully separates from the welding torch 1. This operation is extremely convenient, eliminating the need for repeated multi-turn bolt rotations; only the pressing action of the linkage seat 49 is required, simplifying the disassembly process of the mounting bracket 3. When the mounting bracket 3 separates from the welding torch 1, the positioning plate 46 is no longer compressed, and the elastic water bladder 44 returns to its original shape. Simultaneously, the magnetorheological fluid 45 inside the water bladder 44 further promotes this return. When the water bladder 44 is in its correct shape, it will quickly push the positioning plate 46, causing the positioning plate 46 to move towards the position where the mounting bracket 3 is connected on the welding torch 1. At this time, the positioning plate 46 and the water bladder 44 will quickly seal the corresponding position of the mounting bracket 3 on the welding torch 1, achieving the purpose of immediately sealing the corresponding position of the welding torch 1 after the mounting bracket 3 is removed. This eliminates the need for workers to apply stickers midway, omitting the process of sealing the welding torch 1 with stickers in the existing technology. It can effectively prevent dust from entering the inside of the welding torch 1 during the off-peak period. Then, the protective lens on the mounting bracket 3 can be replaced. After replacement, the positioning plate 46 is actively moved towards the water bladder 44, and the positioning plate 46 will compress the water bladder 44. Then, the mounting bracket 3 is reset into the welding torch 1, and the positioning plate 46 is released.The positioning plate 46 will firmly abut against the reset mounting bracket 3 due to the pressure of the water bag 44. Then, the connecting plate will move the linkage seat 49 upward and reset it. The linkage seat 49 will drive the two auxiliary magnetic blocks 53 to be magnetically connected and fixed to the corresponding main magnetic blocks 52. The linkage seat 49 will also cause the main magnet 48 to reset and rotate through the two T-shaped blocks 50 and the hinge seat 51. After the main magnet 48 is reset, it will generate a magnetic field of opposite poles between itself and the auxiliary magnet 43. At this time, the water bag 44 and the magnetorheological fluid 45 will harden rapidly, thereby completing the rigid fixation of the mounting bracket 3, eliminating the gap period when the welding torch 1 is removed from the mounting bracket 3, and ensuring the welding accuracy of the welding torch 1.
[0017] Example 2: The technical solution of this example, which differs from that of Example 1, includes: a counterweight mechanism 2 for providing stability to the welding torch 1 is provided on the bottom side of the welding torch 1. The counterweight mechanism 2 includes a placement box 21, and multiple placement slots 22 are provided on the placement box 21. Anti-slip pads 23 are symmetrically arranged and fixedly connected inside each placement slot 22. Counterweight blocks 24 are slidably connected in two placement slots 22. The placement box 21 is fixedly connected to the bottom side wall of the welding torch 1. The anti-slip pads 23 are all made of rubber, and the outer walls of the counterweight blocks 24 abut against the corresponding anti-slip pads 23. In use, the placement box 21 and the placement slot 22 can accommodate the counterweight 24. The anti-slip pad 23 inside the placement slot 22 can improve the stability of the connection between the counterweight 24 and the placement slot 22, preventing the counterweight 24 from accidentally separating from the placement slot 22. The quantitative counterweight of the counterweight 24 can increase the weight of the grip part of the welding gun 1, causing the overall center of the welding gun 1 to shift, increasing the stability of the operator when holding the welding gun 1, reducing the frequency of hand tremors, and thus improving the welding accuracy of the welding gun head. In addition, the placement slot 22 has multiple slots. When different operators use it, they can selectively fill as many counterweights 24 as needed according to their optimal weight, thus improving the overall adaptability of the welding gun 1.
[0018] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-precision welding device for circumferential seams of aerospace piping components, characterized in that: The welding torch (1) is provided with a counterweight mechanism (2) on the bottom side to provide stability for the welding torch (1). A mounting bracket (3) is slidably connected to the welding torch (1). A quick-release protection mechanism (4) is provided on the welding torch (1) at a position adjacent to the mounting bracket (3). The quick-release protection mechanism (4) is used to provide closed protection for the position of the welding torch (1) corresponding to the mounting bracket (3) when the mounting bracket (3) is removed. The quick-release protection mechanism (4) includes two guide grooves (41) and a mounting groove (42). A secondary magnet (43) is fixedly connected to one side of the mounting groove (42). A water bladder (44) is fixedly connected to the side of the secondary magnet (43). The water bladder (44) is filled with magnetorheological fluid (45). A positioning plate (46) is slidably connected to one side of the mounting groove (42) corresponding to the water bladder (44). Two guide blocks (47) are fixedly connected to the positioning plate (46). 46) A main magnet (48) is rotatably connected to one end via a shaft. A symmetrically arranged linkage seat (49) is slidably connected to the positioning plate (46). A T-shaped block (50) is slidably connected to each linkage seat (49). A symmetrical hinge seat (51) is fixedly connected to the shaft of the main magnet (48). A main magnetic block (52) is fixedly connected to the top position of the linkage seat (49) inside the positioning plate (46). A secondary magnetic block (53) is fixedly connected to the top of each linkage seat (49).
2. The high-precision welding device for circumferential seams of aerospace pipeline components according to claim 1, characterized in that: The counterweight mechanism (2) includes a placement box (21), which has multiple placement slots (22). Each placement slot (22) has a symmetrically arranged anti-slip pad (23) fixedly connected inside. Two of the placement slots (22) have counterweight blocks (24) slidably connected to them.
3. The high-precision welding device for circumferential seams of aerospace pipeline components according to claim 2, characterized in that: The placement box (21) is fixedly connected to the bottom side wall of the welding gun (1). The anti-slip pads (23) are all made of rubber, and the outer wall of the counterweight (24) abuts against the corresponding anti-slip pad (23).
4. The high-precision welding device for circumferential seams of aerospace pipeline components according to claim 1, characterized in that: The mounting groove (42) is opened on the welding gun (1) at the position corresponding to the mounting bracket (3). The guide groove (41) is symmetrically opened on the welding gun (1) at the position corresponding to the mounting groove (42). The guide groove (41) is connected to the mounting groove (42).
5. The high-precision welding device for circumferential seams of aerospace pipeline components according to claim 1, characterized in that: The auxiliary magnet (43) has a south pole on one side, and the main magnet (48) has a north pole at the position corresponding to the south pole of the auxiliary magnet (43). The magnetorheological fluid (45) is in a hardened state due to the opposite magnetic field between the main magnet (48) and the auxiliary magnet (43). The water bag (44) is movably connected inside the mounting groove (42). The water bag (44) is elastic. The bottom of the main magnetic block (52) is set as the north pole, and the top of the auxiliary magnetic block (53) is set as the south pole. The main magnetic block (52) and the corresponding auxiliary magnetic block (53) are connected by opposite magnetic attraction.
6. The high-precision welding device for circumferential seams of aerospace pipeline components according to claim 1, characterized in that: The mounting bracket (3) has an inclined side corner. The bottom corner of the positioning plate (46) abuts against the inclined position of the mounting bracket (3). The top of the linkage seat (49) slides through the corresponding main magnetic block (52) and the top wall of the positioning plate (46) are fixedly connected to the connecting plate. The hinge seat (51) is hinged to the corresponding T-shaped block (50).