Vacuum vapor phase welding butt joint positioning mechanism

Abstract

The present application belongs to the technical field of vacuum vapor phase welding, and specifically discloses a vacuum vapor phase welding butt joint type positioning mechanism, which comprises a supporting box, a welding box is connected to one side of the upper end of the supporting box, a cover plate is hingedly connected to one side of the welding box, a supporting table is connected to one side of the supporting box corresponding to the welding box, supporting wheels are rotatably connected to both sides of the upper end of the supporting table, an installation mechanism is connected to the middle of the lower end of the inner wall of the welding box, the installation mechanism is used for positioning multiple groups of pipe fittings, and the installation mechanism comprises a frame body. Through the arrangement of the auxiliary feeding mechanism, the butt joint mechanism and the installation mechanism, the present application realizes non-damage feeding of welding pieces, accurate alignment of shafts and batch efficient positioning during the vapor phase welding of micro fuel pipes, and achieves the effects of improving the welding opening qualification rate and the overall welding efficiency.

Description

Technical Field

[0001] This invention belongs to the field of vacuum phase welding, and specifically discloses a vacuum phase welding butt-joint positioning mechanism. Background Technology

[0002] In the aerospace field, aerospace microfuel tubes are core fluid transmission components in propulsion and environmental control systems. They are mostly made of high-strength, corrosion-resistant materials such as titanium alloys and 316L stainless steel, and are extremely small in size. The requirements for the sealing, strength, and fatigue resistance of the welded joints are stringent. Vacuum phase welding can provide a high-vacuum, oxidation-free welding environment, which can effectively avoid defects such as weld embrittlement and porosity caused by metal oxidation during the welding process. At the same time, its uniform heat transfer characteristics through the gas phase medium can precisely control the heat input range and minimize the plastic deformation caused by local overheating of thin-walled micro-tubes. It has become the preferred process for welding aerospace microfuel tubes. In addition, the microstructure of the welded joint after vacuum phase welding is uniform, which can meet the long-term use requirements of spacecraft under extreme conditions. Therefore, it is widely used in the mass production of aerospace microfuel tubes.

[0003] However, in actual production processes, due to the small size of the micro fuel tubes, manual loading requires precise placement of the tubes into the designated positions on the welding positioning mechanism, which is extremely difficult. Not only is it easy for the tubes to slip and deform due to unstable gripping, but fingerprints and grease residues on the tube surfaces also contaminate the welding area and compromise the cleanliness of the vacuum environment. More importantly, the current loading and positioning system relies entirely on manual placement and adjustment of each tube individually, lacking a unified benchmark and relying entirely on experience. This makes it difficult to ensure that the fixed axis of all tubes is consistent, often resulting in axis misalignment. This directly leads to uneven weld joint gaps during welding, which in turn causes defects such as incomplete fusion and weld beads, resulting in a consistently low weld qualification rate. At the same time, the need for workers to place each tube individually is cumbersome and time-consuming, significantly reducing overall welding efficiency. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to propose a vacuum phase welding butt-joint positioning mechanism to solve the problems of high operation difficulty, easy damage and contamination of pipes when manually feeding micro fuel tubes in the prior art, lack of unified positioning benchmark leading to axial offset and low weld qualification rate, and long time and low welding efficiency when operating one piece at a time.

[0005] To achieve the above objectives, the present invention provides a vacuum phase welding butt-joint positioning mechanism, comprising a support box, a welding box connected to one side of the upper end of the support box, an installation mechanism connected to the lower middle of the inner wall of the welding box, the installation mechanism comprising a frame, lead screws uniformly connected to the middle of one side of the inner wall of the frame, movable blocks connected to both sides of the outer walls of the two lead screws, a positioning plate connected to the upper end of the frame, and butt-joint mechanisms slidably connected to both sides of the upper end of the positioning plate, the butt-joint mechanism comprising a movable plate, a fixing mechanism uniformly connected to the middle of the upper end of the movable plate, the fixing mechanism comprising a support plate, a positioning disk connected to the middle of one side of the support plate, and a positioning disk connected to the middle of one side of the positioning disk. The device is equipped with a housing. A threaded rod is connected to the lower middle part of the inner wall of the housing. Threaded blocks are slidably connected to the upper and lower parts of the outer wall of the threaded rod. Clamping blocks are connected to one end of each of the two threaded blocks. A sleeve rod is connected to the middle of one side of the housing. An auxiliary feeding mechanism is connected to the middle of the upper part of the positioning plate. The auxiliary feeding mechanism includes a connecting slide rail. A slider is slidably connected to the upper end of the connecting slide rail. A box is connected to the upper end of the slider. A feeding platform is connected to the upper end of the box. Feeding slots are provided on both sides of the upper part of the feeding platform. The lower part of the feeding slots is V-shaped. A connecting slot is provided in the middle of the upper part of the feeding platform. The two feeding slots are located at the two ends of the connecting slot.

[0006] Preferably, the lower end of the frame is connected to the middle of the lower end of the inner wall of the welding box, a rotating rod is connected to the middle of one side of the frame, one end of each of the two lead screws extends through to one side of the frame, the lead screws are provided with bidirectional threads, pulleys are connected to the middle of the outer wall of the two lead screws and the outer wall of the rotating rod, the multiple pulleys are connected by a transmission belt, the two moving blocks slide on both sides of the outer wall of the two lead screws respectively, and the upper ends of the two moving blocks extend through to the upper end of the positioning plate.

[0007] Preferably, a cover plate is connected to one side of the welding box via a hinge, and a support platform is connected to one side of the support box corresponding to the welding box. Both sides of the upper end of the support platform are rotatably connected to the support wheels. There are two sets of movable plates, and the lower ends of the two movable plates are respectively connected to the upper ends of two movable blocks.

[0008] Preferably, the lower end of the support plate is connected to the upper end of the movable plate, the upper end of the threaded rod extends through to the upper end of the housing, the threaded rod is provided with bidirectional thread, a rotating handle is connected to the upper end of the threaded rod, and one end of each of the two threaded blocks extends through to one side of the housing.

[0009] Preferably, there are two sets of clamping blocks, with the upper end of one clamping block and the lower end of the other clamping block both having a V-shaped structure, and the upper end of one clamping block and the lower end of the other clamping block both being connected to a buffer pad, which is made of silicone material.

[0010] Preferably, the lower end of the connecting slide rail is connected to the middle of the upper end of the positioning plate, and the upper end of the positioning plate is provided with slots evenly distributed.

[0011] Preferably, an air inlet pipe is connected to the lower part of one side of the feeding platform. One end of the air inlet pipe extends through the inside of the feeding platform and into the connecting groove. The air inlet pipe is L-shaped. An air supply pipe is connected to the upper end of the air inlet pipe. Air blowing nozzles are connected to both ends of the air supply pipe. Pipes are connected inside both feeding grooves.

[0012] Preferably, the lower ends of the feeding platform are connected to two sleeves, and the inner walls of the two sleeves are slidably connected to a locking block. The shape of the lower end of the locking block is adapted to the shape of the locking groove. The two locking blocks are located inside the two sleeves respectively. The lower parts of both sides of the locking block are inclined. The middle of the lower end of the two locking blocks is embedded with a moving wheel. The upper ends of the two locking blocks are connected to two connecting springs. The upper ends of the multiple connecting springs are respectively connected to the upper ends of the inner walls of the two sleeves.

[0013] Preferably, a first guide ring is connected to one side of the upper end of the inner wall of each of the two shells, and a pull rope is connected to the middle of the upper end of each of the two locking blocks. One side of the outer wall of each of the two pull ropes is respectively fitted inside the two first guide rings. One end of each of the two pull ropes passes through the two shells and the box body and extends to one side of the box body. A second guide ring is fitted to one side of the outer wall of each of the two pull ropes. The upper ends of the two second guide rings are respectively connected to the upper sides of the inner wall of the box body. One end of each of the two pull ropes is connected to a pull block, which is located on one side of the box body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The auxiliary feeding mechanism achieves precise initial positioning of the pipe fittings through the feeding trough. Combined with the air-blowing sleeve design, the operator does not need to manually handle small pipe fittings to align with the sleeve. They only need to place the pipe fittings into the feeding trough and the airflow will automatically sleeve them, greatly reducing the difficulty of operation. At the same time, the non-contact air-blowing feeding reduces the pipe fittings from slipping, colliding and deforming due to unstable handling, and also eliminates fingerprint and grease residue, effectively protecting the structural integrity of the pipe fittings and maintaining the cleanliness of the welding area and vacuum environment, reducing the risk of weld porosity defects.

[0016] Each fixing mechanism has a slot on the upper part of the positioning plate, and the slot is precisely coaxial with the sleeve rod. The feeding table achieves precise alignment of each group through the cooperation of the locking block and the locking slot, ensuring that the pipe fitting and the sleeve rod axis are completely aligned when the air is blown. The clamping block of the fixing mechanism is clamped synchronously by the bi-directional threaded rod, and the V-shaped centering effect is used to further calibrate the pipe fitting axis, avoiding the experience error of manual adjustment. This greatly reduces the axis deviation when each group of pipe fittings is connected, and the weld gap is uniform, effectively reducing defects such as incomplete fusion and weld beads, and significantly improving the weld qualification rate.

[0017] The auxiliary feeding mechanism can slide on the feeding platform and cooperate with multiple sets of slots to complete the assembly of multiple sets of pipe fittings one by one in one go. The fixing mechanism is evenly arranged along the moving plate to support the synchronous clamping and fixing of multiple sets of pipe fittings. The screw drive design can drive all docking mechanisms to move synchronously, realizing the simultaneous docking of multiple sets of pipe fittings. Compared with manual feeding and adjustment of each piece and each set, the positioning time of a single batch of pipe fittings is greatly shortened. At the same time, the installation mechanism can be moved out of the welding box for external pre-positioning without waiting for the welding box to cool down or repeatedly opening and closing, reducing the preparation time of the welding box vacuum environment and further improving the batch production efficiency of pipe fittings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the welding box of the present invention;

[0020] Figure 3 This is a schematic diagram of the installation mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the connection structure between the movable block, the movable plate, and the fixing mechanism of the present invention;

[0022] Figure 5 This is a schematic diagram of the mounting structure of the clamping block of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection structure of the housing, the locking block, and the pull rope of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the material feeding trough of the present invention;

[0025] Figure 8 This is a schematic diagram of the connection structure of the connecting slide rail, slider, box body and feeding platform of the present invention.

[0026] In the diagram: 1. Support box; 2. Welding box; 3. Cover plate; 4. Support platform; 5. Loading wheel; 6. Frame; 7. Positioning plate; 8. Rotating rod; 9. Lead screw; 10. Pulley; 11. Transmission belt; 12. Moving block; 13. Moving plate; 14. Support plate; 15. Positioning disc; 16. Housing; 17. Threaded rod; 18. Threaded block; 19. Clamping block; 20. Sleeve rod; 21. Connecting slide rail; 22. Slider; 23. Box body; 24. Feeding platform; 25. Feeding trough; 26. Connecting groove; 27. Air inlet pipe; 28. Air delivery pipe; 29. ​​Air nozzle; 30. Fittings; 31. Housing; 32. Locking block; 33. Moving wheel; 34. Connecting spring; 35. First guide ring; 36. Pull rope; 37. Second guide ring; 38. Pull block; 39. Locking groove. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0029] like Figures 1-8 The vacuum phase welding butt positioning mechanism shown includes a support box 1, a welding box 2 connected to one side of the upper end of the support box 1, a cover plate 3 connected to one side of the welding box 2 by a hinge, a support platform 4 connected to one side of the support box 1 corresponding to the welding box 2, and two rotatable support wheels 5 connected to both sides of the upper end of the support platform 4. An installation mechanism is connected to the middle of the lower end of the inner wall of the welding box 2. The installation mechanism is used to position multiple sets of pipe fittings 30. The installation mechanism includes a frame 6, the lower end of the frame 6 is connected to the middle of the lower end of the inner wall of the welding box 2, a rotating rod 8 is connected to the middle of one side of the frame 6, and two lead screws 9 are evenly connected to the middle of one side of the inner wall of the frame 6. One end of each lead screw 9 extends through to one side of the frame 6. A positioning plate 7 is connected to the upper end of the frame 6. A butt docking mechanism is slidably connected to both sides of the upper end of the positioning plate 7. The butt docking mechanism is used to butt dock and position multiple sets of pipe fittings 30. An auxiliary feeding mechanism is connected to the middle of the upper end of the positioning plate 7.

[0030] The welding box 2 forms a closed welding space, meeting the vacuum environment requirements of vacuum phase welding. The cover plate 3 can be opened and closed to enable the placement and removal of positioning components and to seal the welding box 2. The support platform 4 and the support wheels 5 cooperate to assist the installation mechanism in sliding inside and outside the welding box 2, reducing frictional resistance when the components move, and facilitating the positioning of the pipe fittings 30 by the staff outside the welding box 2. This avoids the cover plate 3 from being opened for a long time and damaging the cleanliness inside the welding box 2. The installation mechanism provides the installation foundation for the docking mechanism and the auxiliary feeding mechanism. The docking mechanism drives multiple sets of pipe fittings 30 to accurately approach and dock, while the auxiliary feeding mechanism realizes the batch and automated installation of pipe fittings 30, reducing the difficulty of manual operation.

[0031] like Figure 4 As shown: The lead screw 9 is configured with a bidirectional thread. One side of the outer wall of the two lead screws 9 is connected to a pulley 10 and the middle of the outer wall of the rotating rod 8. Multiple pulleys 10 are connected by a transmission belt 11. Moving blocks 12 are connected to both sides of the outer wall of the two lead screws 9. The two moving blocks 12 slide on both sides of the outer wall of the two lead screws 9 respectively. The upper ends of the two moving blocks 12 extend through to the upper end of the positioning plate 7.

[0032] The lead screw 9 can drive the two moving blocks 12 to slide synchronously in opposite directions, ensuring that the moving distance of the left and right docking mechanisms is consistent and avoiding deviation when the pipe fittings 30 are docked. The pulley 10 and the transmission belt 11 cooperate to realize the synchronous transmission of the rotating rod 8 and the two lead screws 9, ensuring the smoothness of the docking mechanism when sliding.

[0033] like Figures 3-5 As shown: The docking mechanism includes two sets of movable plates 13. The lower ends of the two movable plates 13 are respectively connected to the upper ends of two movable blocks 12. Fixed mechanisms are evenly connected to the middle of the upper ends of the movable plates 13. The fixed mechanisms include support plates 14, the lower ends of which are connected to the upper ends of the movable plates 13. A positioning plate 15 is connected to the middle of one side of the support plate 14. A housing 16 is connected to the middle of one side of the positioning plate 15. A threaded rod 17 is connected to the middle of the lower end of the inner wall of the housing 16. The upper end of the threaded rod 17 extends through to the upper end of the housing 16. The threaded rod 17 is a bidirectional thread. The threaded rod 17 is equipped with a rotating handle at its upper end. Threaded blocks 18 are slidably connected to the upper and lower parts of the outer wall of the threaded rod 17. One end of each threaded block 18 extends through to one side of the housing 16. A clamping block 19 is connected to one end of each threaded block 18. A sleeve rod 20 is connected to the middle of one side of the housing 16. There are two sets of clamping blocks 19. The upper end of one clamping block 19 and the lower end of the other clamping block 19 are both set in a V-shape. A buffer pad is connected to the upper end of one clamping block 19 and the lower end of the other clamping block 19. The buffer pad is made of silicone material.

[0034] The movable plate 13 carries multiple sets of fixing mechanisms to achieve batch positioning of multiple sets of pipe fittings 30. The two sets of movable plates 13 correspond to the pipe fittings 30 on both sides respectively. They can move towards the middle synchronously under the drive of the movable block 12 to complete the docking of the pipe fittings 30. The fixing mechanism is used to clamp and fix a single pipe fitting 30. When the threaded rod 17 rotates, it can drive the upper and lower threaded blocks 18 to slide towards each other, thereby driving the two sets of clamping blocks 19 to clamp the pipe fittings 30 synchronously. The V-shaped surface of the clamping block 19 ensures that the axis of the pipe fitting 30 is consistent with the sleeve rod 20. The silicone buffer pad is used to protect the outer wall of the pipe fitting 30 during clamping, to prevent the thin-walled pipe fitting 30 from plastic deformation due to excessive clamping force, and at the same time enhances the clamping friction to prevent the pipe fitting 30 from shifting during welding.

[0035] like Figures 6-8As shown: The auxiliary feeding mechanism includes a connecting slide rail 21. The lower end of the connecting slide rail 21 is connected to the middle of the upper end of the positioning plate 7. A slider 22 is slidably connected to the upper end of the connecting slide rail 21. A box 23 is connected to the upper end of the slider 22. A feeding platform 24 is connected to the upper end of the box 23. Feeding grooves 25 are provided on both sides of the upper end of the feeding platform 24. The lower part of the feeding grooves 25 is V-shaped. A connecting groove 26 is provided in the middle of the upper end of the feeding platform 24. The two feeding grooves 25 are located at both ends of the connecting groove 26. The upper end of the positioning plate 7 is evenly provided with slots 39. Each set of slots 39 The central axis of 9 is precisely aligned with the central axis of the sleeve rod 20 of the corresponding fixing mechanism. This is used to achieve one-to-one alignment between the feeding platform 24 and each individual fixing mechanism, ensuring that the pipe fitting 30 corresponding to each fixing mechanism can be accurately fitted onto the outer wall of the sleeve rod 20 through the auxiliary feeding mechanism. An air inlet pipe 27 is connected to the lower part of one side of the feeding platform 24. One end of the air inlet pipe 27 extends through the interior of the feeding platform 24 and into the interior of the connecting groove 26. The air inlet pipe 27 is L-shaped. An air delivery pipe 28 is connected to the upper end of the air inlet pipe 27. Air nozzles are connected to both ends of the air delivery pipe 28. 29. Both feeding troughs 25 are internally connected to pipe fittings 30. Both sides of the lower end of the feeding platform 24 are connected to housings 31. Both housings 31 have slidingly connected locking blocks 32 on their inner walls. The shape of the lower end of the locking blocks 32 matches the shape of the locking grooves 39. The two locking blocks 32 are located inside the two housings 31 respectively. The lower parts of both sides of the locking blocks 32 are inclined. The middle of the lower end of both locking blocks 32 is embedded with a moving wheel 33. Both sides of the upper end of the two locking blocks 32 are connected to connecting springs 34. The upper ends of the multiple connecting springs 34 are respectively connected to the upper ends of the inner walls of the two housings 31. Two shells 31 are connected to the upper side of the inner wall of the two shells 31 with a first guide ring 35. Two blocks 32 are connected to the middle of the upper end with a pull rope 36. The outer side of the two pull ropes 36 is respectively fitted inside the two first guide rings 35. One end of the two pull ropes 36 passes through the two shells 31 and the box body 23 and extends to one side of the box body 23. A second guide ring 37 is fitted on one side of the outer wall of the two pull ropes 36. The upper ends of the two second guide rings 37 are respectively connected to the upper sides of the inner wall of the box body 23. One end of the two pull ropes 36 is connected to a pull block 38, which is located on one side of the box body 23.

[0036] The connecting slide rail 21 and the slider 22 cooperate to guide the feeding platform 24 to slide horizontally along the positioning plate 7, ensuring that the moving direction of the feeding platform 24 is consistent with the axis of the sleeve rod 20. The feeding groove 25 is used to initially limit the pipe 30 to prevent the pipe 30 from rolling off. The slot 39 cooperates with the block 32 to achieve accurate positioning of the feeding platform 24 at different fixed positions, ensuring that the feeding groove 25 is coaxial with the sleeve rod 20 and providing a reference for the air blowing sleeve rod 20. The air inlet pipe 27 is connected to an external air source, and the air delivery pipe 28 cooperates with the air blowing nozzle 29 to split the air source and spray air along the direction of the sleeve rod 20, pushing the pipe 30 to be sleeved on the outer wall of the sleeve rod 20 to achieve non-contact feeding.

[0037] The housing 31 is used to accommodate the locking block 32 and the connecting spring 34, providing guidance for the sliding of the locking block 32. The moving wheel 33 reduces the friction between the locking block 32 and the positioning plate 7, making the material feeding table 24 slide more smoothly. The connecting spring 34 is used to provide the locking block 32 with the reset spring force, ensuring that the locking block 32 automatically springs into the positioning when aligned with the slot 39. The first guide ring 35 and the second guide ring 37 are used to change the direction of the pull rope 36, so that the horizontal pulling force of the pull block 38 is converted into the vertical pulling force of the locking block 32, making it convenient for the operator to release the positioning of the material feeding table 24 by pulling the pull block 38. The pull block 38 is used to centrally control the two pull ropes 36, simplifying the reset operation steps of the material feeding table 24.

[0038] Working principle: Open the cover plate 3 of the welding box 2, take out the frame 6, positioning plate 7, docking mechanism and auxiliary feeding mechanism as a whole, slide along the support wheel 5 of the support platform 4 to the outside of the welding box 2, the auxiliary feeding mechanism is located at one end of the connecting slide rail 21, the clamping block 32 is squeezed into the sleeve 31 by the positioning plate 7; the V-shaped clamping blocks 19 of all fixing mechanisms are kept open by reverse twisting the threaded rod 17, and the sleeve rod 20 is waiting for batch feeding.

[0039] According to the fixed number of groups, the staff put two sets of pipe fittings 30 to be welded into two feeding slots 25 respectively. The V-shaped structure of the feeding slot 25 initially limits the pipe fittings 30 to prevent rolling and displacement. The feeding table 24 is pushed to slide along the connecting slide rail 21. The moving wheel 33 rotates above the positioning plate 7. When the feeding table 24 slides into the corresponding slot 39, the locking block 32 is pushed into the slot 39 under the action of the connecting spring 34, and the positioning of the feeding table 24 is completed.

[0040] An external clean air source is diverted to the air nozzles 29 at both ends via an L-shaped air inlet pipe 27 and an air delivery pipe 28. The left nozzle sprays air synchronously along the left sleeve rod 20 and the right nozzle sprays air synchronously along the right sleeve rod 20, pushing the two sets of pipe fittings 30 in the discharge trough 25 towards the corresponding sleeve rods 20, so that the two pipe fittings 30 are automatically fitted onto the outer wall of the sleeve rod 20. Then, the pull block 38 is pulled through the pull rope 36. The pull rope 36 is turned by the first guide ring 35 and the second guide ring 37, lifting the locking block 32 upward, so that it is disengaged from the current locking slot 39. The discharge platform 24 is continued to be pushed. The locking block 32 moves with the discharge platform 24 and is sequentially locked into the subsequent multiple locking slots 39. Multiple pipe fittings 30 are respectively fitted onto the outer wall of the corresponding multiple sleeve rods 20 by the same air blowing method.

[0041] Subsequently, the staff turned the rotating handle at the top of each fixing mechanism housing 16 one by one. The rotating handle drove the bidirectional threaded rod 17 inside the housing 16 to rotate. The threaded rod 17 drove the upper and lower threaded blocks 18 to slide towards each other, thereby pushing the two sets of V-shaped clamping blocks 19 to move towards the pipe 30 outside the sleeve rod 20 in a synchronized manner, until the silicone buffer pad on the inner wall of the clamping block 19 was tightly attached to the outer wall of the pipe 30, so as to achieve a stable fixation of the single pipe 30 and prevent the pipe 30 from shifting during subsequent docking. Furthermore, the centering effect of the V-shaped clamping blocks 19 further ensured that the axis of the pipe 30 was consistent with the axis of the sleeve rod 20.

[0042] After all pipe fittings 30 are fixed, the auxiliary feeding mechanism is moved to the side of the connecting slide rail 21 without affecting the movement of the fixing mechanism. The annular welding material is pre-fitted onto the welding ends of multiple pipe fittings 30 corresponding to each group of fixing mechanisms on one side. The rotating rod 8 on one side of the frame 6 is rotated. The rotating rod 8 drives the two bidirectional threaded screws 9 inside the frame 6 to rotate synchronously through the linkage between the pulley 10 on the outer wall and the transmission belt 11. The moving blocks 12 on both sides of the outer wall are driven by the threads to slide in the opposite direction, driving the two moving plates 13 connected at the upper end to move synchronously towards the middle along the positioning plate 7. As the moving plates 13 move, the multiple groups of pipe fittings 30 fixed on the sleeve rods 20 on both sides move synchronously towards the middle until the welding ends of the two pipe fittings 30 in each group are precisely connected, thus completing the synchronous connection of all pipe fittings 30.

[0043] After confirming that all pipe fittings 30 are connected, slide the overall assembly consisting of frame 6 and positioning plate 7 back into welding box 2 along the support wheel 5 of support platform 4, close the cover plate 3 of welding box 2, and directly start the vacuum phase welding equipment to draw a vacuum and perform welding, which greatly shortens the vacuum preparation time.

[0044] After welding is completed, the heating system is turned off, and room temperature nitrogen is introduced to accelerate cooling. Once the temperature inside the welding box 2 drops to a suitable level, the vacuum valve is opened to release the gas, the cover plate 3 is opened, and the entire assembly is slid onto the support platform 4. In the reverse order of fixing, the rotating handles of each fixing mechanism are turned in reverse one by one, so that the threaded rod 17 rotates in the opposite direction, causing the threaded block 18 and the clamping block 19 to open, releasing the lock on all pipe fittings 30. The rotating rod 8 is rotated in the opposite direction, and the moving block 12 and the moving plate 13 are driven to separate to both sides through the screw 9, so that the connected pipe fittings 30 are separated synchronously with the fixing mechanism. Then, the workers take out the multiple sets of fuel pipes that have been welded one by one.

[0045] 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 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 the claimed invention.

Claims

1. A vacuum phase welding butt-joint positioning mechanism, comprising a support box (1), characterized in that, The support box (1) is connected to a welding box (2) on one side of its upper end. The welding box (2) is connected to an installation mechanism at the lower middle of its inner wall. The installation mechanism includes a frame (6). A lead screw (9) is evenly connected to the middle of one side of the inner wall of the frame (6). Moving blocks (12) are connected to both sides of the outer walls of the two lead screws (9). A positioning plate (7) is connected to the upper end of the frame (6). A docking mechanism is slidably connected to both sides of the upper end of the positioning plate (7). The docking mechanism includes a moving plate (13). A fixing mechanism is evenly connected to the middle of the upper end of the moving plate (13). The fixing mechanism includes a support plate (14). A positioning disk (15) is connected to the middle of one side of the support plate (14). A housing (16) is connected to the middle of one side of the positioning disk (15). A threaded rod (17) is connected to the middle of the lower end of the inner wall of the housing (16). The upper and lower parts of the outer wall of the threaded rod (17) are slidably connected to threaded blocks (18), and one end of the two threaded blocks (18) is connected to a clamping block (19). The middle part of one side of the housing (16) is connected to a sleeve rod (20). The middle part of the upper end of the positioning plate (7) is connected to an auxiliary feeding mechanism. The auxiliary feeding mechanism includes a connecting slide rail (21). The upper end of the connecting slide rail (21) is slidably connected to a slider (22). The upper end of the slider (22) is connected to a box body (23). The upper end of the box body (23) is connected to a feeding platform (24). The upper ends of the feeding platform (24) are provided with feeding grooves (25) on both sides. The shape of the feeding groove (25) below is V-shaped. The middle part of the upper end of the feeding platform (24) is provided with a connecting groove (26). The two feeding grooves (25) are located at both ends of the connecting groove (26). An air inlet pipe (27) is connected to the lower part of one side of the feeding platform (24). One end of the air inlet pipe (27) extends through the inside of the feeding platform (24) and into the inside of the connecting groove (26). The air inlet pipe (27) is L-shaped. An air supply pipe (28) is connected to the upper end of the air inlet pipe (27). Air blowing nozzles (29) are connected to both ends of the air supply pipe (28). Pipe fittings (30) are connected inside both feeding grooves (25).

2. The vacuum phase welding butt-joint positioning mechanism according to claim 1, characterized in that, The lower end of the frame (6) is connected to the middle of the lower end of the inner wall of the welding box (2). A rotating rod (8) is connected to the middle of one side of the frame (6). One end of each of the two lead screws (9) extends through to one side of the frame (6). The lead screws (9) are bidirectionally threaded. One side of the outer wall of each of the two lead screws (9) is connected to a pulley (10) at the middle of the outer wall of the rotating rod (8). The multiple pulleys (10) are connected by a transmission belt (11). The two moving blocks (12) slide on both sides of the outer wall of the two lead screws (9). The upper ends of the two moving blocks (12) extend through to the upper end of the positioning plate (7).

3. The vacuum phase welding butt-joint positioning mechanism according to claim 1, characterized in that, The welding box (2) is hinged to a cover plate (3) on one side. The support box (1) is connected to a support platform (4) on the side corresponding to the welding box (2). The upper sides of the support platform (4) are rotatably connected to the support wheels (5). There are two sets of moving plates (13). The lower ends of the two moving plates (13) are respectively connected to the upper ends of the two moving blocks (12).

4. The vacuum phase welding butt-joint positioning mechanism according to claim 1, characterized in that, The lower end of the support plate (14) is connected to the upper end of the movable plate (13). The upper end of the threaded rod (17) extends through to the upper end of the housing (16). The threaded rod (17) is provided with bidirectional threads. A rotating handle is connected to the upper end of the threaded rod (17). One end of each of the two threaded blocks (18) extends through to one side of the housing (16).

5. The vacuum phase welding butt-joint positioning mechanism according to claim 1, characterized in that, The number of clamping blocks (19) is two sets. The upper end of one clamping block (19) and the lower end of the other clamping block (19) are both set in a V-shape. The upper end of one clamping block (19) and the lower end of the other clamping block (19) are connected to a buffer pad, which is made of silicone material.

6. The vacuum phase welding butt-joint positioning mechanism according to claim 1, characterized in that, The lower end of the connecting slide rail (21) is connected to the middle of the upper end of the positioning plate (7), and the upper end of the positioning plate (7) is evenly provided with slots (39).

7. The vacuum phase welding butt-joint positioning mechanism according to claim 1, characterized in that, Both sides of the lower end of the feeding platform (24) are connected to a housing (31). The inner walls of the two housings (31) are slidably connected to a locking block (32). The shape of the lower end of the locking block (32) is adapted to the shape of the locking groove (39). The two locking blocks (32) are located inside the two housings (31). The lower parts of both sides of the locking block (32) are inclined. The middle of the lower end of the two locking blocks (32) is embedded with a moving wheel (33). The upper sides of the two locking blocks (32) are connected to a connecting spring (34). The upper ends of the multiple connecting springs (34) are respectively connected to the upper ends of the inner walls of the two housings (31).

8. A vacuum phase welding butt-joint positioning mechanism according to claim 7, characterized in that, A first guide ring (35) is connected to one side of the upper end of the inner wall of the two shells (31). A pull rope (36) is connected to the middle of the upper end of the two locking blocks (32). The outer wall of the two pull ropes (36) is respectively fitted inside the two first guide rings (35). One end of the two pull ropes (36) passes through the two shells (31) and the box body (23) and extends to one side of the box body (23). A second guide ring (37) is fitted on one side of the outer wall of the two pull ropes (36). The upper ends of the two second guide rings (37) are respectively connected to the upper sides of the inner wall of the box body (23). One end of the two pull ropes (36) is connected to a pull block (38). The pull block (38) is located on one side of the box body (23).

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