Laser welding machine for electric motor stators

Abstract

The application relates to the technical field of laser welding, and discloses a laser welding machine for a motor stator, which comprises an operation table, the top of the operation table is provided with two parallel welding stations, electric rotating clamps are installed at the two welding stations, a double-shaft movement platform is further installed on the top of the operation table, and a laser welding gun is installed at the movable end of the double-shaft movement platform. The sleeve is fixedly installed at the gun head of the laser welding gun, the sleeve is provided with a rotatable sleeve and a plurality of fixed pipes, hoses and movable pipes, high-pressure gas is introduced into the air inlet pipe, high-pressure air flow can be continuously sprayed around the gun head, a dynamic air protection barrier is formed, the metal welding slag generated in the welding process can be effectively blocked and deflected, the precise laser welding gun head is prevented from being shot at and polluted or damaged, and the durability of the gun head and the stability of the welding process are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a laser welding machine for motor stators. Background Technology

[0002] In the field of motor manufacturing, the production of motor stators is one of the core processes. A stator typically consists of a stator core and coils wound around it. To ensure structural stability and electrical performance, the silicon steel sheets, end caps, or related lead components of the stator core must be welded and fixed. With the maturity of laser technology, laser welding has gradually become the mainstream process for motor stator welding due to its advantages such as high energy density, small heat-affected zone, fast welding speed, and ease of automation.

[0003] During laser welding, the high-energy laser beam rapidly melts and vaporizes the metal material, generating a large amount of metal vapor and liquid metal slag. These high-temperature, high-speed spatters easily reach and adhere to the surface of the laser welding torch tip. The accumulation of slag directly leads to laser output power attenuation, focus shift, and even lens burnout due to localized overheating, severely affecting the stability and consistency of welding quality. As a result, operators have to frequently stop the machine to clean or replace the lens, which greatly reduces production efficiency and increases maintenance costs. Although some existing technologies attempt to disperse spatter by blowing air laterally, these solutions mostly use fixed or unidirectional airflow nozzles. The protective airflow they create not only has blind spots but also has an unstable airflow pattern, making it difficult to form a continuous, complete, and uniform closed barrier around the torch tip, resulting in very limited protective effect. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a laser welding machine for motor stators.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A laser welding machine for motor stators includes an operating table with two welding stations arranged side-by-side on its top. Each welding station is equipped with an electric rotary clamp. A dual-axis motion platform is also mounted on the top of the operating table, and a laser welding gun is mounted on the movable end of the dual-axis motion platform. The machine also includes:

[0007] A gas blowing protection mechanism is installed at the tip of the laser welding gun. It blows out high-pressure gas to form an air protection barrier at the tip of the gun, preventing welding slag generated during welding from shooting towards the tip of the gun.

[0008] The self-cleaning mechanism, which is connected to the air-blowing protection mechanism, automatically cleans the laser welding gun head when switching welding positions.

[0009] As a further embodiment of the present invention, the air blowing protection mechanism includes a mounting sleeve fixedly installed at the head of a laser welding gun. A sleeve is rotatably mounted on the outer surface of the mounting sleeve. Multiple fixed tubes are symmetrically and fixedly installed through the outer surface of the sleeve. A flexible tube is fixedly installed at the end of the fixed tube away from the sleeve. A movable tube is fixedly installed at the end of the flexible tube. The opening of the movable tube faces the head of the laser welding gun. An air inlet pipe is fixedly installed through the end of the mounting sleeve away from the head of the laser welding gun.

[0010] As a further aspect of the present invention, a drive assembly is installed inside the sleeve. The drive assembly includes multiple blades, which are spirally fixed to the inner wall of the sleeve. Airflow entering through the intake pipe blows onto the blades, causing the sleeve to rotate.

[0011] As a further embodiment of the present invention, the self-cleaning mechanism includes a rotating ring sleeved on the outside of the sleeve. A lever matching the fixed tube is fixedly installed on the outer surface of the rotating ring near the movable tube. A plurality of limiting blocks are uniformly fixedly installed on the outer surface of the fixed tube. The lever passes through the outer surface of the plurality of limiting blocks and is slidably installed therewith. A lever frame is fixedly installed at the end of the lever. The lever frame has a hollow structure. A lever post is fixedly installed on the outer surface of the movable tube. The lever post is slidably installed on the inner wall of the lever frame. An actuating assembly for driving the rotating ring to move axially is installed on the top of the operating table.

[0012] As a further embodiment of the present invention, the actuating assembly includes a slide rail fixedly installed on the top of the operating table, a movable frame slidably installed on the inner side of the slide rail, a slider slidably installed on the inner wall of the movable frame, a gantry frame fixedly installed on the top of the slider, and a vertical connecting assembly installed between the gantry frame and the rotating ring.

[0013] As a further embodiment of the present invention, a trapezoidal plate is fixedly installed at the top of the slide rail near the welding station, and the two sides of the portal frame intermittently slide against the inclined side and short side of the trapezoidal plate.

[0014] As a further embodiment of the present invention, the vertical connecting assembly includes multiple sliding rods fixedly installed between the top wall of the portal frame and the top of the slider, and an mounting ring is slidably installed between the outer surfaces of the sliding rods, and the rotating ring and the outer surface of the mounting ring are rotatably installed through a bearing.

[0015] As a further embodiment of the present invention, a reset assembly is installed between the slider and the movable frame. The reset assembly includes a fixed rod fixedly installed between the inner walls of opposite ends of the movable frame. The fixed rod passes through the outer surface of the slider and is slidably installed therewith. A reset spring is sleeved on the outer surface of the fixed rod. The reset spring is located between the inner wall of the slider and the movable frame at the end away from the welding station.

[0016] As a further embodiment of the present invention, a rubber tube is fixedly installed at the opening of the movable tube, a fixing plate is fixedly installed on the outer surface of the fixed tube, and a clamp is fixedly installed on the outer surface of the fixing plate near the rubber tube, the clamp being able to clamp the opening of the rubber tube into a hollow, flat shape.

[0017] As a further embodiment of the present invention, the operating table is equipped with a pressing mechanism for applying pressure to the top of the motor stator at the top of the welding station. The pressing mechanism includes a retainer fixedly installed at the top of the operating table, a cylinder fixedly installed at the top of the retainer, and a pressure block fixedly installed at the telescopic end of the cylinder.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. By fixing and installing a mounting sleeve at the tip of the laser welding gun, and setting a rotatable sleeve and multiple fixed tubes, hoses and movable tubes, and cooperating with the high-pressure gas introduced through the air inlet pipe, a high-pressure airflow can be continuously sprayed around the tip of the gun, forming a dynamic air protection barrier. This can effectively block and deflect the metal welding slag generated during the welding process, preventing it from hitting and contaminating or damaging the precision laser welding gun tip, and significantly improving the durability of the tip of the gun and the stability of the welding process.

[0020] 2. By fixing multiple blades in a spiral shape on the inner wall of the sleeve, when the high-pressure airflow enters the sleeve through the inlet pipe, it will blow the blades and drive the entire sleeve to rotate rapidly. This causes the fixed pipe and the movable pipe to revolve around the gun head at high speed, so that the multiple streams of air ejected are connected in the air to form a high-speed rotating, closed encircling ring, eliminating the protection dead angle, greatly enhancing the integrity and protection density of the air barrier, and providing more rigorous dynamic protection for the gun head.

[0021] 3. A clamp is installed on the outer surface of the fixed tube via a fixing plate. When the movable tube is in the air blowing protection working position, the clamp can clamp the opening of the rubber tube into a hollow flat shape, which increases the spray width of a single air stream, allowing the sprayed air stream to form a wider and thicker air curtain, thereby effectively thickening the air surrounding ring composed of multiple air streams and further enhancing the isolation effect against welding spatter.

[0022] 4. When the self-cleaning mechanism is triggered, the rubber tube moves with the movable tube and disengages from the inside of the clamp. The rubber tube will return from the clamped flat state to a circular tube shape, making the airflow more concentrated in the gun head cleaning mode. This enhances the impact force and cleaning effect of the airflow on the welding slag attached to the surface of the gun head, and realizes the adaptive switching of the pneumatic performance of the same air circuit system between the protection mode and the cleaning mode. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the front structure of a laser welding machine for motor stators proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the left side structure of a laser welding machine for motor stators proposed in this invention;

[0025] Figure 3 This is a schematic diagram of the slide rail structure of a laser welding machine for motor stators proposed in this invention;

[0026] Figure 4 This is a schematic diagram of the mounting sleeve structure of a laser welding machine for motor stators proposed in this invention;

[0027] Figure 5 This is a schematic diagram of the internal structure of the sleeve of a laser welding machine for motor stators proposed in this invention;

[0028] Figure 6 This is a schematic cross-sectional view of the sleeve structure of a laser welding machine for motor stator proposed in this invention.

[0029] Figure 7 This is a schematic diagram of the movable frame structure of a laser welding machine for motor stators proposed in this invention;

[0030] Figure 8 This is a schematic diagram of the clamping nozzle structure of a laser welding machine for motor stators proposed in this invention;

[0031] Figure 9 for Figure 4 Enlarged view of the structure at point A in the middle.

[0032] In the diagram: 1. Operating table; 2. Electric rotary clamp; 3. Dual-axis motion platform; 4. Clamping mechanism; 401. Cage; 402. Cylinder; 403. Pressure block; 5. Laser welding gun; 6. Mounting sleeve; 7. Sleeve; 8. Blade; 9. Fixed tube; 10. Hose; 11. Movable tube; 12. Rubber hose; 13. Inlet pipe; 14. Rotary ring; 15. Mounting ring; 16. Lever; 17. Lever bracket; 18. Lever post; 19. Fixed plate; 20. Grip; 21. Limit block; 22. Slide rail; 23. Movable frame; 24. Slider; 25. Gantry frame; 26. Slide rod; 27. Fixed rod; 28. Return spring; 29. ​​Trapezoidal plate. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] See attached document Figure 1 -Appendix Figure 9 A laser welding machine for motor stators includes an operating table 1, with two welding stations arranged side-by-side on the top of the operating table 1, each equipped with an electric rotary clamp 2. A dual-axis motion platform 3 is also mounted on the top of the operating table 1, with a laser welding gun 5 mounted on the movable end of the dual-axis motion platform 3. The machine also includes:

[0036] The air blowing protection mechanism is installed at the gun head of the laser welding gun 5. It forms an air protection barrier at the gun head by blowing out high-pressure gas to prevent the welding slag generated during welding from shooting towards the gun head.

[0037] The self-cleaning mechanism and the air-blowing protection mechanism work together to automatically clean the laser welding gun head when switching welding positions.

[0038] In this embodiment, the air blowing protection mechanism includes a mounting sleeve 6 fixedly installed at the head of the laser welding gun 5. A sleeve 7 is rotatably installed on the outer surface of the mounting sleeve 6. Multiple fixed tubes 9 are symmetrically fixedly installed through the outer surface of the sleeve 7. A flexible tube 10 is fixedly installed at the end of the fixed tube 9 away from the sleeve 7. A movable tube 11 is fixedly installed at the end of the flexible tube 10. The opening of the movable tube 11 faces the head of the laser welding gun 5. An air inlet pipe 13 is fixedly installed through the end of the mounting sleeve 6 away from the head of the laser welding gun 5. A drive assembly is installed inside the sleeve 7. The drive assembly includes multiple blades 8. The multiple blades 8 are spirally fixedly installed on the inner wall of the sleeve 7. The airflow entering through the air inlet pipe 13 blows onto the blades 8, driving the sleeve 7 to rotate.

[0039] In use, by fixing a sleeve 6 to the head of the laser welding gun 5, and setting a rotatable sleeve 7 and multiple fixed tubes 9, flexible tubes 10 and movable tubes 11, and cooperating with the high-pressure gas connected to the air inlet pipe 13, a high-pressure airflow can be continuously sprayed around the gun head, forming a dynamic air protection barrier. This can effectively block and deflect the metal slag generated during the welding process, preventing it from hitting and contaminating or damaging the precision laser welding gun head 5, significantly improving the durability of the gun head and the stability of the welding process. By fixing multiple blades 8 in a spiral shape on the inner wall of the sleeve 7, when the high-pressure airflow enters the sleeve 7 through the air inlet pipe 13, it will blow the blades 8 and drive the entire sleeve 7 to rotate rapidly, causing the fixed tubes 9 and movable tubes 11 to revolve at high speed around the gun head. This allows the multiple streams of air to connect in the air to form a high-speed rotating, closed encircling ring, eliminating blind spots in protection, greatly enhancing the integrity and protection density of the air barrier, and providing more rigorous dynamic protection for the gun head.

[0040] In this embodiment, the self-cleaning mechanism includes a rotating ring 14 sleeved on the outside of the sleeve 7. A lever 16 matching the fixed tube 9 is fixedly installed on the outer surface of the rotating ring 14 near the movable tube 11. Multiple limiting blocks 21 are uniformly fixedly installed on the outer surface of the fixed tube 9. The lever 16 passes through the outer surface of the multiple limiting blocks 21 and is slidably installed therewith. A lever frame 17 is fixedly installed at the end of the lever 16. The lever frame 17 has a hollow structure. A lever post 18 is fixedly installed on the outer surface of the movable tube 11. The lever post 18 is slidably installed on the inner wall of the lever frame 17. An actuating assembly for driving the rotating ring 14 to move axially is installed on the top of the operating table 1. The actuating assembly includes a slide rail 22 fixedly installed on the top of the operating table 1. A movable frame 23 is slidably installed on the inner side of the slide rail 22. A slider 24 is slidably installed on the inner wall of the movable frame 23. A gate-shaped frame 25 is fixedly installed on the top of the slider 24. A vertical connecting assembly is installed between the frame 25 and the rotating ring 14. A trapezoidal plate 29 is fixedly installed at the top of the slide rail 22 near the welding station. The two sides of the gantry frame 25 slide intermittently with the inclined and short sides of the trapezoidal plate 29. The vertical connecting assembly includes multiple slide rods 26 fixedly installed between the top wall of the gantry frame 25 and the top of the slider 24. An installation ring 15 is slidably installed between the outer surfaces of the slide rods 26. The rotating ring 14 and the outer surface of the installation ring 15 are rotatably installed through a bearing. A reset assembly is installed between the slider 24 and the movable frame 23. The reset assembly includes a fixing rod 27 fixedly installed between the inner walls of opposite ends of the movable frame 23. The fixing rod 27 passes through the outer surface of the slider 24 and is slidably installed therewith. A reset spring 28 is sleeved on the outer surface of the fixing rod 27. The reset spring 28 is located between the inner wall of the slider 24 and the movable frame 23 at the end away from the welding station.

[0041] When the laser welding gun 5 moves from the current welding station to another welding station under the drive of the dual-axis motion platform 3, the laser welding gun 5 drives the movable frame 23 to slide towards the welding station inside the slide rail 22 via the rotating ring 14, mounting ring 15, slide rod 26, and slider 24. During this process, the gantry frame 25 installed at the top of the slider 24 moves accordingly. When the gantry frame 25 moves to the trapezoidal plate 29 fixedly installed at the top of the slide rail 22, the two sides of the gantry frame 25 slide into contact with the inclined side of the trapezoidal plate 29. Under the squeezing and guiding action, the gantry frame 25 drives the slider 24 to move backward along the axis of the fixed rod 27 (i.e., move away from the welding station). At this time, the return spring 28 is compressed and stores energy. As the laser welding gun 5 continues to move, the gantry frame 25 disengages from the trapezoidal plate 29. Under the elastic force released by the return spring 28, the slider 24 automatically slides forward and resets along the fixed rod 27. Then, through the slide rod 26 and the mounting ring 15, it drives the rotating ring 14 and the movable tube 11 linked with it to return to the initial air blowing protection position.

[0042] In this embodiment, a rubber tube 12 is fixedly installed at the opening of the movable tube 11, and a fixing plate 19 is fixedly installed on the outer surface of the fixed tube 9. A clamp 20 is fixedly installed on the outer surface of the fixing plate 19 near the rubber tube 12. The clamp 20 can clamp the opening of the rubber tube 12 into a hollow flat shape.

[0043] A clamp 20 is installed on the outer surface of the fixed tube 9 via a fixing plate 19. When the movable tube 11 is in the air-blowing protection working position, the clamp 20 can clamp the opening of the rubber tube 12 into a hollow flat shape, increasing the spray width of a single airflow. This allows the sprayed airflow to form a wider and thicker air curtain, effectively thickening the air surrounding ring composed of multiple airflows and further enhancing the isolation effect against welding spatter. When the self-cleaning mechanism is triggered, the rubber tube 12 moves with the movable tube 11 and disengages from the clamp 20. The rubber tube 12 will then return from the clamped flat state to a circular tube shape, making the sprayed airflow more concentrated in the gun head cleaning mode. This enhances the impact and cleaning effect of the airflow on the welding slag adhering to the gun head surface, achieving adaptive switching of the pneumatic performance of the same air circuit system between the protection mode and the cleaning mode.

[0044] In this embodiment, the operating table 1 is equipped with a pressing mechanism 4 for pressurizing the top of the motor stator at the top of the welding station. The pressing mechanism 4 includes a retainer 401 fixedly installed at the top of the operating table 1, a cylinder 402 fixedly installed at the top of the retainer 401, and a pressure block 403 fixedly installed at the telescopic end of the cylinder 402.

[0045] Two welding stations are arranged side-by-side on the top of the operating table 1, and electric rotary clamps 2 are installed. Simultaneously, a clamping mechanism 4, installed at the top of the operating table 1, uses a cylinder 402 to drive a pressure block 403 downwards, applying a stable clamping force to the top of the motor stator. This ensures the stator core remains in a fixed position during welding, effectively improving weld consistency. The dual-station layout allows for loading and unloading operations at the other station while welding at one station, significantly improving the overall production cycle and efficiency of the equipment.

[0046] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: When in use, the motor stator to be welded is placed on any empty electric rotating clamp 2, and the motor stator is clamped and fixed by the electric rotating clamp 2. Then, the extension end of the cylinder 402 drives the pressure block 403 to move downward, and applies clamping force to the top of the stator core.

[0047] After the motor stator is installed, the laser welding gun 5 is aligned with the outside of the stator core and welded using the dual-axis motion platform 3.

[0048] During welding operations, the connection between the air inlet pipe 13 and the external high-pressure air source is made so that the external high-pressure air source enters the sleeve 7 through the air inlet pipe 13, and then flows through the fixed pipe 9, the flexible hose 10 and the movable pipe 11 in sequence, and finally is sprayed out through the rubber hose 12. The sprayed high-pressure airflow can form a wind wall at the gun head of the laser welding gun 5 to prevent welding slag from splashing onto the gun head during welding.

[0049] At the same time, the high-pressure airflow will also blow the blades 8 installed on the inner wall of the sleeve 7, so that multiple blades 8 can drive the sleeve 7 to rotate as a whole under the action of the airflow, so that the fixed tube 9 rotates rapidly around the gun head of the laser welding gun 5, so that the ejected airflow can form a closed surrounding ring, further improving the protection effect on the gun head.

[0050] By setting the clamp 20, the opening of the rubber tube 12 is clamped into a hollow flat shape when it is in the air blowing protection state, which increases the width of the airflow ejected from the rubber tube 12, thereby thickening the formed air surrounding ring and strengthening the protection effect on the gun head.

[0051] When the welding is completed and the laser welding gun 5 is moved to another welding station by the dual-axis motion platform 3, the laser welding gun 5 will drive the movable frame 23 to move inside the slide rail 22 through the rotating ring 14, mounting ring 15, slide rod 26 and slider 24. When the gantry frame 25 installed on the slider 24 moves to the trapezoidal plate 29, the gantry frame 25 will drive the slider 24 to move backward along the axis of the fixed rod 27 under the squeezing action of the inclined side of the trapezoidal plate 29. This will cause the slider 24 to drive the rotating ring 14 to move towards the air inlet pipe 13 through the slide rod 26 and mounting ring 15. This will cause the rotating ring 14 to pull the lever 16 to move the lever 17. This will cause the lever 17 to pull the opening of the movable tube 11 towards the head of the laser welding gun 5 through the lever 18 until the rubber tube 12 is aligned with the head. At this time, the high-pressure airflow blown out by the rubber tube 12 can directly clean the surface of the head, thereby achieving automatic cleaning of the head.

[0052] At the same time, the rubber tube 12 will also be removed from the inside of the clamp 20. The rubber tube 12 will return from the clamped flat state to a circular tube shape, making the airflow more concentrated in the gun head cleaning mode. This enhances the impact and cleaning effect of the airflow on the welding slag attached to the surface of the gun head, and realizes the adaptive switching of the pneumatic performance of the same air circuit system between the protection mode and the cleaning mode.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser welding machine for motor stators, comprising an operating table (1), wherein two welding stations are arranged side by side on the top of the operating table (1), and each welding station is equipped with an electric rotary clamp (2); a dual-axis motion platform (3) is also installed on the top of the operating table (1), and a laser welding gun (5) is installed at the movable end of the dual-axis motion platform (3), characterized in that, Also includes: The air blowing protection mechanism is installed at the gun head of the laser welding gun (5). It forms an air protection barrier at the gun head by blowing out high-pressure gas to prevent the welding slag generated during welding from shooting towards the gun head. The self-cleaning mechanism and the air-blowing protection mechanism are connected by a transmission mechanism, so that the laser welding gun (5) automatically blows and cleans the gun head when switching welding positions.

2. The laser welding machine for motor stators according to claim 1, characterized in that, The air blowing protection mechanism includes a mounting sleeve (6) fixedly installed at the head of the laser welding gun (5). A sleeve (7) is rotatably installed on the outer surface of the mounting sleeve (6). Multiple fixed tubes (9) are symmetrically fixedly installed through the outer surface of the sleeve (7). A flexible tube (10) is fixedly installed at the end of the fixed tube (9) away from the sleeve (7). A movable tube (11) is fixedly installed at the end of the flexible tube (10). The opening of the movable tube (11) faces the head of the laser welding gun (5). An air inlet tube (13) is fixedly installed through the end of the mounting sleeve (6) away from the head of the laser welding gun (5).

3. A laser welding machine for motor stators according to claim 2, characterized in that, The sleeve (7) is equipped with a drive assembly, which includes multiple blades (8). The multiple blades (8) are fixedly installed in a spiral shape on the inner wall of the sleeve (7). The airflow entering through the air inlet pipe (13) blows onto the blades (8) and drives the sleeve (7) to rotate.

4. A laser welding machine for motor stators according to claim 3, characterized in that, The self-cleaning mechanism includes a rotating ring (14) sleeved on the outside of the sleeve (7). A lever (16) matching the fixed tube (9) is fixedly installed on the outer surface of the rotating ring (14) near the movable tube (11). Multiple limiting blocks (21) are evenly fixedly installed on the outer surface of the fixed tube (9). The lever (16) passes through the outer surface of the multiple limiting blocks (21) and is slidably installed therewith. A lever frame (17) is fixedly installed at the end of the lever (16). The lever frame (17) has a hollow structure. A lever post (18) is fixedly installed on the outer surface of the movable tube (11). The lever post (18) is slidably installed on the inner wall of the lever frame (17). A lever assembly that drives the rotating ring (14) to move axially is installed on the top of the operating table (1).

5. A laser welding machine for motor stators according to claim 4, characterized in that, The actuation assembly includes a slide rail (22) fixedly installed on the top of the operating table (1), a movable frame (23) is slidably installed on the inner side of the slide rail (22), a slider (24) is slidably installed on the inner wall of the movable frame (23), a gantry frame (25) is fixedly installed on the top of the slider (24), and a vertical connecting assembly is installed between the gantry frame (25) and the rotating ring (14).

6. A laser welding machine for motor stators according to claim 5, characterized in that, The top of the slide rail (22) near the welding station is fixedly installed with a trapezoidal plate (29), and the two sides of the gantry frame (25) slide intermittently with the inclined side and short side of the trapezoidal plate (29).

7. A laser welding machine for motor stators according to claim 6, characterized in that, The vertical connection assembly includes multiple sliding rods (26) fixedly installed between the top wall of the portal frame (25) and the top of the slider (24). An installation ring (15) is slidably installed between the outer surfaces of the sliding rods (26). The rotating ring (14) and the outer surfaces of the installation ring (15) are rotatably installed through a bearing.

8. A laser welding machine for motor stators according to claim 7, characterized in that, A reset assembly is installed between the slider (24) and the movable frame (23). The reset assembly includes a fixed rod (27) fixedly installed between the inner walls of opposite ends of the movable frame (23). The fixed rod (27) passes through the outer surface of the slider (24) and is slidably installed therewith. A reset spring (28) is sleeved on the outer surface of the fixed rod (27). The reset spring (28) is located between the inner wall of the slider (24) and the movable frame (23) at the end away from the welding station.

9. A laser welding machine for motor stators according to claim 2, characterized in that, A rubber tube (12) is fixedly installed at the opening of the movable tube (11), and a fixing plate (19) is fixedly installed on the outer surface of the fixed tube (9). A clamp (20) is fixedly installed on the outer surface of the fixing plate (19) near the rubber tube (12). The clamp (20) can clamp the opening of the rubber tube (12) into a hollow flat shape.

10. A laser welding machine for motor stators according to claim 1, characterized in that, The operating table (1) is equipped with a pressing mechanism (4) for pressurizing the top of the motor stator at the top of the welding station. The pressing mechanism (4) includes a retainer (401) fixedly installed at the top of the operating table (1). A cylinder (402) is fixedly installed at the top of the retainer (401). A pressure block (403) is fixedly installed at the telescopic end of the cylinder (402).

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