Vacuum cup laser welding device

Abstract

The invention discloses a vacuum cup laser welding device, and belongs to the technical field of laser welding, the vacuum cup laser welding device comprises a processing table, the top of the processing table is connected with a base box, and the top of the base box is provided with a synchronous clamping assembly. According to the device, the air curtain assembly is arranged, a continuous and uniform annular laminar flow air curtain is formed by means of the nozzle array evenly distributed in the circumferential direction, a stable inert gas protection environment is formed in a welding area, the oxidation probability of a molten pool is remarkably reduced, meanwhile, the air curtain structure optimally designed through fluid dynamics can effectively disperse welding smoke dust, and the welding quality is improved. By means of a mechanical structure, the angle of the direction adjusting pipe can be accurately adjusted, the coverage range of the air curtain can be flexibly adjusted, accordingly, the vacuum cup body with different specifications can be adapted, possible protection blind areas are eliminated, and the service life of the vacuum cup body is prolonged. And the optimal action angle between the welding protection airflow and the workpiece surface is always kept.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser welding, and particularly relates to a laser welding device for thermos cups. Background Art

[0002] Thermos cups are used to keep the stored water warm and are a very common daily necessity. During production, the cup body and the cup bottom need to be welded. Laser welding is a technology that uses a high-energy laser beam to melt materials to achieve precise connection and can be applied to the welding of thermos cups.

[0003] The document with the publication number CN114833447A discloses a multi-purpose welding device for double-layer stainless steel thermos cups, belonging to the technical field of thermos cup processing equipment. It solves the problem of the limited application of existing thermos cup welding equipment. The multi-purpose welding device includes a frame, a lifting drive device fixedly arranged on the frame, a lifting table fixedly arranged at the output end of the lifting drive device, a drive shaft rotatably arranged on the lifting table, a main shaft drive device fixedly arranged on the lifting table and used to drive the drive shaft to rotate, a fixture device arranged at the end of the drive shaft, a laser welding head arranged on the frame, and an outer shell limiting component and an inner liner limiting component. The multi-purpose welding device can achieve multiple functions with one machine. It can not only be used for the welding of straight-mouth outer shells and straight-mouth inner liners, but also automatically lap the inner liner with the outer shell and then complete the welding, and can even be used for the welding of small round pieces at the end of the cup. However, when the laser welding gun welds the weld seam, the external environment is likely to affect the welding of the weld seam, and the generated welding fumes will also affect the welding effect. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser welding device for thermos cups to solve the problems that the external environment is likely to affect the welding of the weld seam and the generated welding fumes will also affect the welding effect.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A laser welding device for thermos cups includes a processing table. A base box is connected to the top of the processing table. A synchronous clamping assembly is arranged on the top of the base box. A laser welding gun body is arranged on one side of the synchronous clamping assembly. An air curtain assembly is arranged at one end of the laser welding gun body. A sealing assembly is arranged inside the air curtain assembly; The air curtain assembly includes a connecting air ring connected to the outer surface of the laser welding torch body. One side of the connecting air ring communicates with a plurality of micro air pumps for delivering high-pressure air flow. The other side of the connecting air ring is provided with a plurality of deflecting pipes that can swing reciprocally. A delivery hose for delivering high-pressure air flow is communicated between the connecting air ring and the deflecting pipes. One end of the deflecting pipe communicates with a nozzle. The micro air pumps output high-pressure air flow through the delivery hose to the deflecting pipes, so that the nozzles output high-pressure air flow. With the arrangement of a plurality of nozzles, an annular air curtain is formed.

[0006] As a further description of the above technical solution: Both sides of the deflecting pipe are rotatably connected to fixing frames. One side of the fixing frame is connected to one side of the connecting air ring. A protective cover body is connected to the outer peripheral side of the laser welding torch body. The deflecting pipes and the nozzles are both arranged in the protective cover body. A plurality of the deflecting pipes and the nozzles are circumferentially arrayed along the central position of the connecting air ring. The nozzles are flatly arranged.

[0007] As a further description of the above technical solution: A plurality of adjusting lead screws circumferentially arrayed are rotatably connected to the inner wall of the protective cover body. One end of the adjusting lead screw is drivingly connected to a lead screw seat. One end of the lead screw seat away from the adjusting lead screw is hinged to a connecting rod. One end of the connecting rod away from the lead screw seat is hinged to one side of the deflecting pipe.

[0008] As a further description of the above technical solution: A rotating ring is rotatably connected to the outer peripheral side of the protective cover body. One side of the rotating ring is connected to a transmission gear ring. The end of the adjusting lead screw away from the lead screw seat extends outside the protective cover body and is connected to a transmission gear. The transmission gear is meshed with the transmission gear ring. A plurality of limiting holes circumferentially arrayed are formed on one side of the rotating ring. A threaded seat is connected to one side of the protective cover body. A limiting bolt is threadedly connected inside the threaded seat. The limiting bolt can be engaged with the limiting holes.

[0009] As a further description of the above technical solution: The closing assembly includes a plurality of closing plates arranged at the output port of the laser welding torch body. One side of the closing plate is connected to a sliding rod. A connecting frame is slidably connected to the outer surface of the sliding rod. One end of the connecting frame is connected to one side of the connecting air ring. Connecting side plates are connected to both sides of the sliding rod. One side of the connecting side plate is connected to a return spring. The other end of the return spring is connected to one side of the connecting frame. Two connecting groove seats are connected to the end of the sliding rod away from the closing plate. A travel block is slidably connected inside the connecting groove seat. The same linkage rod is connected between the two travel blocks. The other end of the linkage rod is hinged to one side of the deflecting pipe.

[0010] As a further description of the above technical solution: The cross-sectional shape of the closed plate is fan-shaped, and a plurality of closed plates are distributed in a circumferential array, and the plurality of closed plates can form a circle when approaching each other.

[0011] As a further description of the above technical solution: The synchronous clamping assembly includes a rotating table rotatably connected to the top of the base box. A plurality of jaws capable of moving synchronously are arranged on the top of the rotating table. One side of the base box is connected to a side bracket through a transverse plate. A lifting plate capable of moving up and down is arranged on one side of the side bracket. One side of the lifting plate is attached to one side of the side bracket. A rotating sleeve is rotatably connected to the lifting plate. A rotating rod is slidably connected in the rotating sleeve. The inner wall of the rotating sleeve and the cross-section of the rotating rod are regular hexagons. The rotating rod is rotatably connected between the transverse plate and the side bracket. An adsorption disc is arranged at the bottom of the lifting plate. The top of the adsorption disc is connected to an adsorption cylinder. The adsorption cylinder is rotatably connected to the lifting plate.

[0012] As a further description of the above technical solution: Both the outer surfaces of the adsorption cylinder and the rotating sleeve are connected with first synchronous wheels. A first synchronous transmission belt is drivingly connected between the two first synchronous wheels. A rotating shaft is connected to the bottom of the rotating table. Second synchronous wheels are respectively connected to the bottom of the rotating shaft and the rotating rod. A second synchronous transmission belt is drivingly connected between the two second synchronous wheels.

[0013] As a further description of the above technical solution: A lifting push rod is connected to the bottom of the side bracket. The output end of the lifting push rod is connected to one side of the lifting plate. A driving motor is fixedly installed on the top of the side bracket through a mounting plate. One end of the rotating rod extends to the other side of the side bracket and is connected to one end of the output shaft of the driving motor. A fixed block is connected to one side of the rotating table. A moving push rod is connected to one side of the fixed block. The other end of the moving push rod is connected to one side of the jaw.

[0014] As a further description of the above technical solution: A rotary lifting device is connected to the bottom of the laser welding torch body. A moving block is connected to the bottom of the rotary lifting device. A laser generating module is connected to one side of the top of the processing table. Two symmetrically arranged electric push rods are connected to one side of the laser generating module. The other end of the electric push rod is connected to one side of the moving block. A transmission device is connected to the top of the laser generating module. The other end of the transmission device is connected to the laser welding torch body.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by setting up the air curtain assembly, after the limit of the rotating ring is released, the rotating ring drives the change of the direction of the steering pipe through the transmission gear ring, transmission gear, adjustment lead screw, lead screw seat and connecting rod. The high-pressure gas output by the micro air pump is ejected through the nozzle, and a continuous and uniform annular laminar air curtain is formed relying on the circumferentially evenly distributed nozzle array, forming a stable inert gas protection environment in the welding area, significantly reducing the probability of molten pool oxidation. At the same time, the air curtain structure optimized by fluid dynamics can effectively disperse the welding fumes, significantly reduce the oxidation phenomenon of the weld and block the attachment of welding spatter, thereby improving the surface finish and structural airtightness of the weld. Through the mechanical structure, the precise adjustment of the angle of the steering pipe is realized, and the coverage range of the air curtain can be flexibly adjusted, so as to adapt to different specifications of thermos cup bodies, eliminate possible protection blind spots, and ensure that the welding protection air flow always maintains the best action angle with the workpiece surface.

[0016] 2. In the present invention, by setting up the synchronous clamping assembly, the bottom of the thermos cup and the thermos cup body can rotate synchronously in the same direction. The precise limit clamping of the cup body is realized through the coordinated cooperation of the rotating table and the clamping jaw, ensuring the stability of the cup body during the welding process. The suction disc combines the vacuum negative pressure technology to quickly adsorb and fix the bottom of the cup, and drives the bottom of the cup and the cup body to automatically align and fit together with the lifting push rod, avoiding the position deviation caused by manual pressing, significantly improving the assembly efficiency and accuracy. And the synchronous mechanism formed by the first synchronous wheel, the second synchronous wheel, the first synchronous transmission belt and the second synchronous transmission belt can make the bottom of the thermos cup and the thermos cup body rotate synchronously in the same direction, avoiding the misalignment of the bottom of the thermos cup and the thermos cup body due to their own rotational speed deviation and improving the welding effect.

[0017] 3. In the present invention, by setting up the closing assembly, the precise linkage closing of the closing plate is realized through the coordinated action of the transmission gear, the adjustment lead screw and the connecting rod. In this process, a dual-path transmission mechanism of the steering pipe and the limit groove seat is adopted. When the connecting rod fails accidentally, the closing plate can still be driven to close through the direct contact between the steering pipe and the limit groove seat, forming a redundant protection system, significantly improving the operation reliability and fault tolerance ability of the equipment. The closing plate realizes the multi-plate synchronous alignment and fitting under the guidance of the travel block and the limit groove seat, ensuring the full circumferential sealing and shielding of the output port of the laser welding gun body, effectively blocking the laser scattering and the overflow of welding residues, and realizing the protection and cleaning and maintenance functions of the laser welding gun body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram from another perspective in the present invention; Figure 3 is the three-dimensional structure schematic diagram of the synchronous clamping assembly in the present invention; Figure 4Another perspective three-dimensional structure schematic diagram of the synchronous clamping assembly in the present invention; Figure 5 In the present invention Figure 4 Schematic diagram of the enlarged structure of part A; Figure 6 Three-dimensional structure schematic diagram of the air curtain assembly and the closing assembly in the present invention; Figure 7 Three-dimensional structure schematic diagram of the air curtain assembly in the present invention; Figure 8 In the present invention Figure 7 Schematic diagram of the enlarged structure of part B; Figure 9 Internal structure schematic diagram of the air curtain assembly and the closing assembly in the present invention; Figure 10 Three-dimensional disassembled structure schematic diagram of the air curtain assembly and the closing assembly in the present invention; Figure 11 In the present invention Figure 10 Schematic diagram of the enlarged structure of part C; Figure 12 In the present invention Figure 10 Schematic diagram of the enlarged structure of part D.

[0019] Legend: 1. Processing table; 2. Laser generating module; 3. Transmission device; 4. Base box; 5. Synchronous clamping assembly; 501. Driving motor; 502. Side bracket; 503. Lifting push rod; 504. Lifting plate; 505. Rotating table; 506. Suction cup; 507. Rotating rod; 508. Claw; 509. First synchronous pulley; 510. Rotating sleeve; 511. Second synchronous pulley; 512. First synchronous transmission belt; 513. Moving push rod; 514. Suction cylinder; 515. Second synchronous transmission belt; 6. Laser welding gun body; 7. Air curtain assembly; 701. Protective cover body; 702. Rotating ring; 703. Limit hole; 704. Limit bolt; 705. Threaded seat; 706. Connecting air ring; 707. Micro air pump; 708. Direction adjusting pipe; 709. Driving gear; 710. Nozzle; 711. Driving toothed ring; 712. Adjusting lead screw; 713. Lead screw seat; 714. Connecting rod; 715. Delivery hose; 8. Closing assembly; 801. Closing plate; 802. Connecting frame; 803. Sliding rod; 804. Connecting side plate; 805. Travel block; 806. Connecting groove seat; 807. Linking rod; 808. Return spring; 9. Rotary lifting device; 10. Moving block; 11. Electric push rod. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0021] Please refer to Figures 1 - 12 , the present invention provides a technical solution: A laser welding device for a thermos cup, comprising a processing table 1, a base box 4 is connected to the top of the processing table 1, a synchronous clamping assembly 5 is arranged on the top of the base box 4, a laser welding gun main body 6 is arranged on one side of the synchronous clamping assembly 5, an air curtain assembly 7 is arranged at one end of the laser welding gun main body 6, a sealing assembly 8 is arranged inside the air curtain assembly 7, a rotary lifting device 9 is connected to the bottom of the laser welding gun main body 6, a moving block 10 is connected to the bottom of the rotary lifting device 9, a laser generating module 2 is connected to one side of the top of the processing table 1, two symmetrically arranged electric push rods 11 are connected to one side of the laser generating module 2, the other end of the electric push rod 11 is connected to one side of the moving block 10, a transmission device 3 is connected to the top of the laser generating module 2, and the other end of the transmission device 3 is connected to the laser welding gun main body 6.

[0022] The air curtain assembly 7 includes a connecting air ring 706 which is connected to the outer surface of the laser welding torch body 6. One side of the connecting air ring 706 is communicated with a plurality of micro air pumps 707 for delivering high-pressure air flow. The other side of the connecting air ring 706 is provided with a plurality of deflecting pipes 708 capable of reciprocating swing. A delivery hose 715 for delivering high-pressure air flow is communicated between the connecting air ring 706 and the deflecting pipes 708. One end of the deflecting pipe 708 is communicated with a nozzle 710. The micro air pumps 707 make the nozzle 710 output high-pressure air flow through the delivery hose 715 and the deflecting pipes 708. With the arrangement of a plurality of nozzles 710, an annular air curtain is formed. Fixed frames are rotatably connected to both sides of the deflecting pipe 708. One side of the fixed frame is connected to one side of the connecting air ring 706. A protective cover body 701 is connected to the outer peripheral side of the laser welding torch body 6. The deflecting pipes 708 and the nozzles 710 are both arranged in the protective cover body 701. A plurality of deflecting pipes 708 and nozzles 710 are arranged in a circumferential array along the central position of the connecting air ring 706. The nozzle 710 is of a flat type. A plurality of adjusting lead screws 712 arranged in a circumferential array are rotatably connected to the inner wall of the protective cover body 701. One end of the adjusting lead screw 712 is drivingly connected to a lead screw seat 713. One end of the lead screw seat 713 away from the adjusting lead screw 712 is hinged to a connecting rod 714. One end of the connecting rod 714 away from the lead screw seat 713 is hinged to one side of the deflecting pipe 708. A rotating ring 702 is rotatably connected to the outer peripheral side of the protective cover body 701. A transmission gear ring 711 is connected to one side of the rotating ring 702. One end of the adjusting lead screw 712 away from the lead screw seat 713 extends to the outside of the protective cover body 701 and is connected to a transmission gear 709. The transmission gear 709 is meshed and connected with the transmission gear ring 711. A plurality of limiting holes 703 arranged in a circular array are formed in one side of the rotating ring 702. A threaded seat 705 is connected to one side of the protective cover body 701. A limiting bolt 704 is threadedly connected inside the threaded seat 705. The limiting bolt 704 can be clamped with the limiting holes 703.

[0023] The specific implementation method is as follows: By setting the air curtain assembly 7, after removing the limit of the rotating ring 702, the rotating ring 702 drives the deflecting pipes 708 to change direction through the transmission gear ring 711, the transmission gear 709, the adjusting lead screws 712, the lead screw seats 713 and the connecting rods 714. The high-pressure gas output by the micro air pumps 707 is ejected through the nozzles 710. Depending on the circumferentially uniformly distributed nozzle 710 array, a continuous and uniform annular laminar air curtain is formed, forming a stable inert gas protection environment in the welding area, significantly reducing the probability of molten pool oxidation. At the same time, the air curtain structure optimized by fluid dynamics can effectively disperse the welding fumes, significantly reduce the oxidation phenomenon of the weld and block the adhesion of welding spatter, thereby improving the surface smoothness and structural airtightness of the weld. Through the mechanical structure, the angle of the deflecting pipes 708 can be accurately adjusted, and the air curtain coverage range can be flexibly adjusted, so as to adapt to different specifications of thermos cup bodies, eliminate possible protection blind areas, and ensure that the welding protection air flow always maintains the best action angle with the workpiece surface.

[0024] The closing assembly 8 includes a plurality of closing plates 801 arranged at the output port of the laser welding torch body 6. One side of the closing plate 801 is connected with a sliding rod 803. The outer surface of the sliding rod 803 is slidably connected with a connecting frame 802. One end of the connecting frame 802 is connected with one side of the connecting air ring 706. Both sides of the sliding rod 803 are connected with connecting side plates 804. One side of the connecting side plate 804 is connected with a return spring 808. The other end of the return spring 808 is connected with one side of the connecting frame 802. The end of the sliding rod 803 away from the closing plate 801 is connected with two connecting groove seats 806. A travel block 805 is slidably connected in the connecting groove seat 806. The same linkage rod 807 is connected between the two travel blocks 805. The other end of the linkage rod 807 is hinged with one side of the steering pipe 708. The cross-sectional shape of the closing plate 801 is fan-shaped. The plurality of closing plates 801 are distributed in a circumferential array, and the plurality of closing plates 801 can form a circle when approaching each other.

[0025] The specific implementation method is as follows: By setting the closing assembly 8, the precise linkage closing of the closing plate 801 is realized through the coordinated action of the transmission gear 709, the adjustment lead screw 712 and the connecting rod 714. In this process, a dual-path transmission mechanism of the steering pipe 708 and the limit groove seat is adopted. When the linkage rod 807 fails accidentally, the closing plate 801 can still be driven to close through the direct contact between the steering pipe 708 and the limit groove seat, forming a redundant protection system, significantly improving the operation reliability of the equipment and the fault tolerance ability. The closing plate 801 realizes the multi-plate synchronous alignment and fitting under the guidance of the cooperation between the travel block 805 and the limit groove seat, ensuring the full circumferential sealing and shielding of the output port of the laser welding torch body 6, effectively blocking the laser scattering and the overflow of welding residues, and realizing the protection and cleaning and maintenance functions of the laser welding torch body 6.

[0026] The synchronous clamping assembly 5 includes a rotating table 505 rotatably connected to the top of the base box 4. A plurality of jaws 508 capable of synchronous movement are provided on the top of the rotating table 505. One side of the base box 4 is connected to a side bracket 502 through a transverse plate. A lifting plate 504 capable of moving up and down is provided on one side of the side bracket 502. One side of the lifting plate 504 is in contact with one side of the side bracket 502. A rotating sleeve 510 is rotatably connected to the lifting plate 504. A rotating rod 507 is slidably connected inside the rotating sleeve 510. The inner wall of the rotating sleeve 510 and the cross-section of the rotating rod 507 are in the shape of a regular hexagon. The rotating rod 507 is rotatably connected between the transverse plate and the side bracket 502. An adsorption disc 506 is provided at the bottom of the lifting plate 504. The top of the adsorption disc 506 is connected to an adsorption cylinder 514. The adsorption cylinder 514 is rotatably connected to the lifting plate 504. First synchronous pulleys 509 are connected to the outer surfaces of both the adsorption cylinder 514 and the rotating sleeve 510. A first synchronous drive belt 512 is drivingly connected between the two first synchronous pulleys 509. A rotating shaft is connected to the bottom of the rotating table 505. Second synchronous pulleys 511 are connected to both the bottom of the rotating shaft and the rotating rod 507. A second synchronous drive belt 515 is drivingly connected between the two second synchronous pulleys 511. A lifting push rod 503 is connected to the bottom of the side bracket 502. The output end of the lifting push rod 503 is connected to one side of the lifting plate 504. A drive motor 501 is fixedly installed on the top of the side bracket 502 through a mounting plate. One end of the rotating rod 507 extends to the other side of the side bracket 502 and is connected to one end of the output shaft of the drive motor 501. A fixing block is connected to one side of the rotating table 505. A moving push rod 513 is connected to one side of the fixing block. The other end of the moving push rod 513 is connected to one side of the jaw 508.

[0027] The specific implementation method is as follows: By setting the synchronous clamping assembly 5, the bottom of the thermos cup and the thermos cup body can rotate synchronously in the same direction. The precise limit clamping of the cup body is realized through the coordinated cooperation of the rotating table 505 and the jaws 508, ensuring the stability of the cup body during the welding process. The adsorption disc 506 combines vacuum negative pressure technology to quickly adsorb and fix the bottom of the cup, and cooperates with the lifting push rod 503 to drive the bottom of the cup and the cup body to automatically align and fit, avoiding the position deviation caused by manual pressing, significantly improving the assembly efficiency and accuracy. Moreover, the synchronous mechanism formed by the first synchronous pulleys 509, the second synchronous pulleys 511, the first synchronous drive belt 512 and the second synchronous drive belt 515 can enable the bottom of the thermos cup and the thermos cup body to rotate synchronously in the same direction, avoiding the misalignment of the bottom of the thermos cup and the thermos cup body due to their own rotational speed deviation and improving the welding effect.

[0028] Working principle: During use, the staff places the cup body of the thermos cup on the rotating table 505. Then, the moving push rod 513 drives the clamping jaws 508 to move synchronously and complete the limit clamping of the cup body. After that, the staff places the bottom of the thermos cup at the bottom of the suction disc 506. Then, the suction cylinder 514 is activated, and the vacuum negative pressure of the suction disc 506 is used to achieve the adsorption limit of the bottom of the thermos cup. After that, the lifting push rod 503 drives the bottom of the thermos cup to move downward through the lifting plate 504 and the suction disc 506, so that the bottom of the thermos cup fits with the cup body of the thermos cup. The staff adjusts the position of the laser welding torch body 6 through the electric push rod 11 and the rotary lifting device 9, so that the laser welding torch body 6 is directly facing the gap between the bottom of the thermos cup and the cup body of the thermos cup. The laser welding torch body 6 performs welding treatment on the gap. At the same time, the drive motor 501 drives the rotating rod 507 to rotate, the rotating rod 507 drives the rotating sleeve 510 to rotate, the rotating rod 507 and the rotating sleeve 510 respectively drive the second synchronous wheel 511 and the first synchronous wheel 509 to rotate, and the second synchronous wheel 511 and the first synchronous wheel 509 cooperate with the second synchronous transmission belt 515 and the first synchronous transmission belt 512 to drive the suction disc 506 and the rotating table 505 to rotate, so that the bottom of the thermos cup and the cup body of the thermos cup can rotate synchronously and in the same direction.

[0029] Before welding, the staff rotates the limit bolt 704 to separate the limit bolt 704 from the limit hole 703, so that the rotating ring 702 is released from the locked state. The staff turns the rotating ring 702, the rotating ring 702 drives the transmission gear ring 711 to rotate, the transmission gear ring 711 drives the transmission gear 709 to rotate, the transmission gear 709 drives the adjustment lead screw 712 to rotate, the adjustment lead screw 712 drives the lead screw seat 713 to move, the lead screw seat 713 drives the connecting rod 714 to move, and the connecting rod 714 drives the steering pipe 708 to move, so that the deflection angle of the steering pipe 708 changes. Then, the micro air pump 707 is activated, and the micro air pump 707 conveys high-pressure gas into the conveying hose 715 through the connecting air ring 706. The high-pressure gas is ejected through the nozzle 710. Due to the multiple nozzles 710 arranged in a circumferential array, the ejected high-pressure gas can form an annular air curtain.

[0030] After the welding is completed, the staff rotates the rotating ring 702. The rotating ring 702 drives the steering pipe 708 to rotate through the transmission gear 709, the adjustment lead screw 712, the lead screw seat 713 and the connecting rod 714. The steering pipe 708 drives the linkage rod 807 to move. The linkage rod 807 drives the stroke block 805 to move in the limit groove seat. The linkage rod 807 drives the sliding rod 803 to move through the limit groove seat. The sliding rod 803 drives the closing plate 801 to move inward, so that the plurality of closing plates 801 are attached to each other and close the output port of the laser welding torch main body 6. And when the linkage rod 807 fails, the steering pipe 708 can drive the sliding rod 803 to move through its contact with the limit groove seat, thereby driving the closing plate 801 to move, forming a double insurance and improving the stability of the assembly.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes an equivalent replacement or change, and should be covered by the protection scope of the present invention.

Claims

1. A laser welding device for a thermos cup, comprising a processing table (1), characterized in that: The top of the processing table (1) is connected to a base box (4), the top of the base box (4) is provided with a synchronous clamping assembly (5), one side of the synchronous clamping assembly (5) is provided with a laser welding gun body (6), one end of the laser welding gun body (6) is provided with an air curtain assembly (7), and a sealing assembly (8) is provided inside the air curtain assembly (7); The air curtain assembly (7) comprises a connecting air ring (706), the connecting air ring (706) being connected to the outer surface of the laser welding gun body (6), one side of the connecting air ring (706) being connected to a plurality of micro air pumps (707) for conveying high-pressure airflow, the other side of the connecting air ring (706) being provided with a plurality of reciprocatingly swinging direction-adjusting tubes (708), a delivery hose (715) for conveying high-pressure airflow being connected between the connecting air ring (706) and the direction-adjusting tube (708), one end of the direction-adjusting tube (708) being connected to a nozzle (710), the micro air pump (707) enabling the nozzle (710) to output high-pressure airflow through the delivery hose (715) and the direction-adjusting tube (708), and the arrangement of the plurality of nozzles (710) forming an annular air curtain.

2. The laser welding device for a thermos cup according to claim 1, characterized in that: Both sides of the steering tube (708) are rotatably connected to fixed frames, one side of the fixed frame is connected to one side of the connecting gas ring (706), the outer peripheral side of the laser welding gun body (6) is connected to a protective cover body (701), the steering tube (708) and the nozzle (710) are both arranged on the protective cover body (701), and a plurality of the steering tubes (708) and the nozzles (710) are distributed in a circular array along the center position of the connecting gas ring (706), and the nozzles (710) are arranged in a flat manner.

3. The laser welding device for a thermos cup according to claim 2, characterized in that: The inner wall of the protective cover body (701) is rotatably connected to a plurality of adjusting screws (712) distributed in a circular array, one end of the adjusting screw (712) is transmission-connected to a screw seat (713), one end of the screw seat (713) away from the adjusting screw (712) is hinged to a connecting rod (714), and one end of the connecting rod (714) away from the screw seat (713) is hinged to one side of the direction adjustment tube (708).

4. The laser welding device for a thermos cup according to claim 3, characterized in that: The outer peripheral side of the protective cover body (701) is rotatably connected to a rotating ring (702), one side of the rotating ring (702) is connected to a transmission gear ring (711), one end of the adjusting screw (712) away from the screw seat (713) extends to the outside of the protective cover body (701) and is connected to a transmission gear (709), the transmission gear (709) is meshingly connected to the transmission gear ring (711), one side of the rotating ring (702) is provided with a plurality of limiting holes (703) distributed in a circular array, one side of the protective cover body (701) is connected to a threaded seat (705), the threaded seat (705) is internally threadedly connected to a limiting bolt (704), and the limiting bolt (704) can be snap-fitted with the limiting hole (703).

5. The laser welding device for a thermos cup according to claim 1, characterized in that: The closing assembly (8) comprises a plurality of closing plates (801) arranged at the output port of the laser welding gun body (6); a sliding rod (803) is connected to one side of the closing plate (801); a connecting frame (802) is slidably connected to the outer surface of the sliding rod (803); one end of the connecting frame (802) is connected to one side of the connecting gas ring (706); both sides of the sliding rod (803) are connected to connecting side plates (804); one side of the connecting side plate (804) is connected to a return spring (808); the other end of the return spring (808) is connected to one side of the connecting frame (802); one end of the sliding rod (803) away from the closing plate (801) is connected to two connecting groove seats (806); a travel block (805) is slidably connected in the connecting groove seat (806); the two travel blocks (805) are connected to the same connecting rod (807); the other end of the connecting rod (807) is hinged to one side of the direction adjustment tube (708).

6. The laser welding device for a thermos cup according to claim 5, characterized in that: The cross-sectional shape of the closing plate (801) is fan-shaped, and the multiple closing plates (801) are distributed in a circular array, and the multiple closing plates (801) are close to each other to form a circle.

7. The laser welding device for a thermos cup according to claim 1, characterized in that: The synchronous clamping assembly (5) comprises a rotating table (505) rotatably connected to the top of the base box (4); a plurality of clamping claws (508) capable of synchronous movement are arranged on the top of the rotating table (505); one side of the base box (4) is connected to a side bracket (502) via a transverse plate; one side of the side bracket (502) is provided with a lifting plate (504) capable of moving up and down; one side of the lifting plate (504) is in contact with one side of the side bracket (502); and the lifting plate (504) is rotatably connected to a side bracket (502). A rotating sleeve (510) is slidably connected to a rotating rod (507) inside the rotating sleeve (510); the inner wall of the rotating sleeve (510) and the rotating rod (507) have a regular hexagonal cross-sectional shape; the rotating rod (507) is rotatably connected between the transverse plate and the side bracket (502); an adsorption disk (506) is provided at the bottom of the lifting plate (504); an adsorption cylinder (514) is connected to the top of the adsorption disk (506); and the adsorption cylinder (514) is rotatably connected to the lifting plate (504).

8. The laser welding device for a thermos cup according to claim 7, characterized in that: The outer surfaces of the adsorption cylinder (514) and the rotating sleeve (510) are both connected to a first synchronous wheel (509), a first synchronous transmission belt (512) is connected between the two first synchronous wheels (509), a rotating shaft is connected to the bottom of the rotating platform (505), a second synchronous wheel (511) is connected to the bottom of the rotating shaft and the rotating rod (507), and a second synchronous transmission belt (515) is connected between the two second synchronous wheels (511).

9. The laser welding device for a thermos cup according to claim 7, characterized in that: A lifting push rod (503) is connected to the bottom of the side bracket (502), and the output end of the lifting push rod (503) is connected to one side of the lifting plate (504). A driving motor (501) is fixedly mounted on the top of the side bracket (502) via a mounting plate. One end of the rotating rod (507) extends to the other side of the side bracket (502) and is connected to one end of the output shaft of the driving motor (501). One side of the rotating table (505) is connected to a fixed block, and one side of the fixed block is connected to a moving push rod (513), and the other end of the moving push rod (513) is connected to one side of the clamp (508).

10. The laser welding device for a thermos cup according to claim 1, characterized in that: The bottom of the laser welding gun body (6) is connected to a rotating lifting device (9), the bottom of the rotating lifting device (9) is connected to a moving block (10), one side of the top of the processing table (1) is connected to a laser generating module (2), one side of the laser generating module (2) is connected to two symmetrically arranged electric push rods (11), the other end of the electric push rod (11) is connected to one side of the moving block (10), the top of the laser generating module (2) is connected to a transmission device (3), and the other end of the transmission device (3) is connected to the laser welding gun body (6).

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