A precise alignment welding device and method for seamless welding of all-aluminum doors and windows

Abstract

The application discloses a kind of full aluminium door and window seamless welding precision alignment welding device, including base, the upper side of the base is fixedly connected with welding platform, the upper side of the base is fixedly connected with multi-axis drive assembly, laser welder is installed on the multi-axis drive assembly, the vertical side wall of the laser welder is fixedly connected with image acquisition component, vertical pressing mechanism is installed on the laser welder, the front side of the base is fixedly connected with lateral precision positioning mechanism, the upper side of the base is installed with controller.The application can realize the precise positioning and effective compression of the door and window frame welding, can avoid the gap at the butt joint of door and window frame, affect the quality of seamless welding, effectively improve the quality of full aluminium door and window seamless welding, effectively improve the versatility of fixture, improve flexible production capacity.

Description

Technical Field

[0001] This invention relates to the field of door and window welding equipment technology, specifically to a precision alignment welding device and method for seamless welding of all-aluminum doors and windows. Background Technology

[0002] With the high-end, green, and quality-oriented development of the building decoration industry, the end market has put forward higher standards for the comprehensive performance, environmental protection attributes, service life and appearance of building doors and windows. Traditional wooden, PVC and ordinary steel doors and windows are no longer suitable for the application needs of high-end residential, commercial buildings and prefabricated buildings due to their own material characteristics and technological shortcomings. Under this industry development trend, all-aluminum high-end system doors and windows are gradually becoming the mainstream iterative products in the market.

[0003] Traditional aluminum alloy doors and windows have long relied on the mainstream processing technology of corner bracket splicing and argon arc welding, which has many technical drawbacks and seriously restricts the overall performance and quality of the finished doors and windows. Specifically, the corner bracket splicing process relies on corner bracket accessories and screws to connect the profiles at the corners. This results in structural gaps between the profiles and the corner brackets, leading to poor connection stability. Long-term exposure to wind pressure and thermal expansion and contraction can easily cause loosening, misalignment, and abnormal noises, directly resulting in a significant decrease in the airtightness and watertightness of the doors and windows, leading to malfunctions such as water seepage, air leakage, and sound insulation failure. At the same time, dust and moisture easily accumulate in the splicing gaps, accelerating the aging of internal components. Traditional argon arc welding can only achieve surface welding of profiles. The weld penetration is shallow, and the weld is rough and uneven. This not only requires a lot of subsequent grinding and repair processes, resulting in low production efficiency, but also the material at the weld joint is not tightly fused, which easily produces defects such as sand holes, air holes, and cracks. The welding strength is insufficient, the overall structural stability of the window is poor, and there are still tiny gaps in the weld after grinding, which cannot completely solve the problem of air leakage and water seepage. The appearance flatness and refinement cannot meet the needs of high-end home decoration.

[0004] To address the numerous drawbacks of traditional processes, the industry's high-end production technologies have been continuously upgraded, with laser seamless welding gradually replacing traditional processing methods and becoming the mainstream core processing technology for all-aluminum system doors and windows. This process utilizes a high-energy-density laser beam as a heat source to precisely melt and weld the corner joints of door and window profiles, achieving a one-time fusion molding of the profile base material, completely eliminating the assembly structure of corner bracket splicing and the shallow fusion mode of traditional argon arc welding. The welding process features concentrated heat and a small heat-affected zone, preventing damage to the overall structure and surface coating of the profile. The resulting weld is smooth, seamless, and without protrusions, eliminating the need for extensive grinding and finishing, significantly simplifying production processes and improving production precision and efficiency. More importantly, the integrated molding structure completely eliminates splicing gaps and welding defects at the profile corners, creating a rigid, integrated structure for the door and window frame and sash. This greatly improves the overall structural strength, wind pressure resistance, and structural stability of the doors and windows, effectively preventing loosening, deformation, and cracking during long-term use. Existing seamless welding equipment has the following core defects: Traditional fixtures use fixed single-cylinder single-sided clamping, relying solely on mechanical stops for coarse positioning, which easily leads to misalignment at the splicing seams of aluminum profiles. The fixtures have poor versatility and are cumbersome to adjust. Existing clamping mechanisms are fixed-specification fixtures, suitable for doors and windows of a single size and shape. Changing window types or profile cross-sections requires disassembling and reassembling the entire fixture, resulting in time-consuming manual fine-tuning. They are also incompatible with casement windows, sliding windows, and irregularly shaped curved aluminum frames, resulting in poor flexible production capabilities. Summary of the Invention

[0005] The purpose of this invention is to provide a precise alignment welding device and method for seamless welding of all-aluminum doors and windows, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a precision alignment welding device for seamless welding of all-aluminum doors and windows, including a base, a welding platform fixedly connected to the upper side of the base, a multi-axis drive assembly fixedly connected to the upper side of the base, a laser welder mounted on the multi-axis drive assembly, an image acquisition assembly fixedly connected to the vertical sidewall of the laser welder, a vertical clamping mechanism mounted on the laser welder, a lateral precision positioning mechanism fixedly connected to the front side of the base, and a controller mounted on the upper side of the base; The lateral precision positioning mechanism includes a fixed base fixedly connected to a machine base. The upper side of the fixed base has an installation groove, and a first electric push rod is fixedly connected in the installation groove. A moving plate is fixedly connected to the output end of the first electric push rod. Multiple internally threaded tubes are fixedly connected to the vertical side wall of the moving plate. Positioning screws are inserted into the internal threads of the internally threaded tubes. Both ends of the positioning screws extend out of the internally threaded tubes, which can improve the accuracy of the welding joints of door and window frames and effectively improve the versatility of the positioning structure.

[0007] Furthermore, the vertical clamping mechanism includes a second electric actuator fixedly connected to the laser welder. The output end of the second electric actuator faces downward and is fixedly connected to a U-shaped connector. Both ends of the U-shaped connector are fixedly connected to vertical rods. The lower end of the vertical rod is fixedly connected to a mounting rail. The bottom of the mounting rail is fixedly connected to a clamping block by bolts. The head of the laser welder is located between the two clamping blocks, which can prevent misalignment at the joint of the door and window frames and effectively improve the welding quality.

[0008] Furthermore, the multi-axis drive assembly includes a guide rail fixedly connected to the upper side of the base, an electric slide rail movably mounted on the guide rail, a third electric actuator fixedly connected to the upper side of the base, the output end of the third electric actuator fixedly connected to the electric slide rail, a slide table slidably connected to the electric slide rail, a fourth electric actuator fixedly connected to the front side of the slide table, and the laser welder fixedly connected to the output end of the fourth electric actuator, enabling flexible adjustment of the welding trajectory according to actual welding requirements.

[0009] Furthermore, the image acquisition component includes a mounting bracket fixedly connected to the laser welder, with an industrial camera fixedly connected to one end of the mounting bracket away from the laser welder, which can continuously track the weld seam and dynamically correct the laser head movement trajectory.

[0010] Furthermore, four support seats are fixedly connected to the bottom of the base. The four support seats are located at the four corners of the bottom of the base, which can improve the moisture-proof performance and improve the adaptability to the terrain.

[0011] Furthermore, the controller includes a device frame fixedly connected to the upper side of the base, and a control panel is fixedly connected to the upper end of the device frame. The control panel is electrically connected to the laser welder, the first electric actuator, the second electric actuator, the third electric actuator, the fourth electric actuator, and the industrial camera, which can realize the centralized data and motion control of the entire device and realize the intelligence of the device.

[0012] Furthermore, each of the four corners of the welding platform is fixedly connected to a bearing plate, and the bearing plates on the same side are arranged in a figure-eight shape, which can improve the stability of the placement of doors and windows.

[0013] Furthermore, the end of the positioning screw away from the fixed seat is rotatably connected to a pressure plate via a bearing.

[0014] Furthermore, a limiting plate is fixedly connected to the upper side of the welding platform, which can improve the accuracy of positioning.

[0015] A precise alignment welding method for seamless welding of all-aluminum doors and windows includes the following steps: S1. Profile parameter input: Input the door and window frame dimensions, profile cross-section and wall thickness into the control panel. The control panel will automatically retrieve matching process parameters and welding reference trajectory. S2. Rough positioning of profiles: The door and window frame profiles are placed on the welding platform, and the butt joints of the profiles are joined together for preliminary positioning. S3. Synchronous pre-positioning and pre-clamping: The first electric push rod drives the moving plate and multiple positioning screws to approach the door and window frame, and the positioning screws squeeze, position and clamp the door and window frame profiles. S4. Hydraulic pre-shaping: The second electric push rod drives the clamping block to move downward and contact the door and window frame profile, pressing the door and window frame from the vertical direction, completing the precise positioning of the door and window frame, and improving the stability of the welding process. S5. Precise visual alignment and correction: The industrial camera scans the weld seam in three dimensions, the control panel identifies the three-dimensional contour of the weld seam, calculates the three-axis offset and corrects the initial position of the laser welder, controlling the weld seam alignment error within 0.03mm, which can improve the quality of seamless welding. S6. Continuous Seamless Laser Welding: The multi-axis drive assembly drives the laser welder to complete the welding of the four corners in sequence; during the welding process, the industrial camera continuously tracks the weld seam, and the thermal expansion offset is calculated in real time in combination with the temperature of the aluminum welding substrate, and the laser head movement trajectory is dynamically corrected to achieve seamless welding of door and window frames.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention, through its vertical pressing mechanism and lateral precision positioning mechanism, enables precise positioning and effective pressing of the welded joints of door and window frames. This avoids gaps at the joints of door and window frames that could affect the seamless welding quality, thus effectively improving the quality of seamless welding in all-aluminum doors and windows.

[0017] This invention, through the configuration of a first electric actuator, a movable plate, an internally threaded tube, and positioning screws, allows for the adjustment of the extension length of multiple positioning screws according to the specific size and shape of the doors and windows when welding different models of doors and windows. This enables multiple positioning screws to be adapted to doors and windows of different sizes and shapes. Furthermore, the first electric actuator can drive the positioning screws to precisely clamp and hold doors and windows of different sizes and shapes, effectively improving the versatility of the fixture and enhancing flexible production capabilities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure from another direction of the present invention; Figure 3 This is the front view of the present invention; Figure 4 This is a side view of the present invention; Figure 5 for Figure 1 A schematic diagram of the mid-lateral precision alignment mechanism; Figure 6 for Figure 1 Schematic diagram of the connection structure between the laser welder and the vertical clamping mechanism; Figure 7 for Figure 1 A schematic diagram of the vertical clamping mechanism.

[0019] In the diagram: 1. Base; 2. Welding platform; 3. Multi-axis drive assembly; 4. Laser welder; 5. Image acquisition assembly; 6. Vertical clamping mechanism; 7. Lateral precision positioning mechanism; 8. Controller; 9. Fixed base; 10. Mounting slot; 11. First electric actuator; 12. Moving plate; 13. Internally threaded pipe; 14. Positioning screw; 15. Second electric actuator; 16. U-shaped connector; 17. Vertical rod; 18. Mounting rail; 19. Bolt; 20. Clamping block; 21. Guide rail; 22. Electric slide rail; 23. Third electric actuator; 24. Slide table; 25. Fourth electric actuator; 26. Mounting bracket; 27. Industrial camera; 28. Support base; 29. ​​Equipment rack; 30. Control panel; 31. Bearing plate; 32. Bearing; 33. Pressure plate; 34. Limiting plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-7 This invention provides a precision alignment welding device for seamless welding of all-aluminum doors and windows, including a base 1, a welding platform 2 fixedly connected to the upper side of the base 1, a multi-axis drive assembly 3 fixedly connected to the upper side of the base 1, a laser welder 4 mounted on the multi-axis drive assembly 3, an image acquisition assembly 5 fixedly connected to the vertical side wall of the laser welder 4, a vertical clamping mechanism 6 mounted on the laser welder 4, a lateral precision positioning mechanism 7 fixedly connected to the front side of the base 1, and a controller 8 mounted on the upper side of the base 1. The lateral precision positioning mechanism 7 includes a fixed base 9 fixedly connected to the base 1. The upper side of the fixed base 9 is provided with a mounting groove 10. A first electric push rod 11 is fixedly connected in the mounting groove 10. A moving plate 12 is fixedly connected to the output end of the first electric push rod 11. A plurality of internally threaded tubes 13 are fixedly connected to the vertical side wall of the moving plate 12. A positioning screw 14 is inserted into the internal thread of the internally threaded tube 13. Both ends of the positioning screw 14 extend out of the internally threaded tube 13.

[0022] In the above embodiment, the first electric push rod 11 drives the moving plate 12 to move, and the moving plate 12 drives multiple positioning screws 14 to approach the door and window frame, thereby squeezing and positioning the door and window frame, which can improve the accuracy of the welding joint of the door and window frame; by rotating the positioning screws 14, the extension length of the positioning screws 14 can be adjusted, so that the positioning screws 14 can be adapted to door and window frames of different shapes and sizes, effectively improving the versatility of the positioning structure.

[0023] The vertical clamping mechanism 6 includes a second electric push rod 15 fixedly connected to the laser welder 4. The output end of the second electric push rod 15 faces downward and is fixedly connected to a U-shaped connector 16. Both ends of the U-shaped connector 16 are fixedly connected to vertical rods 17. The lower end of the vertical rod 17 is fixedly connected to a mounting rail 18. The bottom of the mounting rail 18 is fixedly connected to a clamping block 20 by bolts 19. The head of the laser welder 4 is located between the two clamping blocks 20.

[0024] In this embodiment, the second electric push rod 15 drives the two clamping blocks 20 to move downwards. The two clamping blocks 20 press against both sides of the welded joint of the door and window frame, thereby improving the stability of the door and window frame welding process and preventing misalignment at the joint of the door and window frame, thus effectively improving the welding quality.

[0025] The multi-axis drive assembly 3 includes a guide rail 21 fixedly connected to the upper side of the base 1, an electric slide rail 22 movably mounted on the guide rail 21, a third electric push rod 23 fixedly connected to the upper side of the base 1, the output end of the third electric push rod 23 fixedly connected to the electric slide rail 22, a slide table 24 slidably connected to the electric slide rail 22, a fourth electric push rod 25 fixedly connected to the front side of the slide table 24, and the laser welder 4 fixedly connected to the output end of the fourth electric push rod 25.

[0026] In this embodiment, the third electric push rod 23, the electric slide rail 22 and the fourth electric push rod 25 cooperate with each other to achieve three-dimensional adjustment of the laser welder 4, thereby enabling flexible adjustment of the welding trajectory according to actual welding requirements.

[0027] The image acquisition component 5 includes a mounting bracket 26 fixedly connected to the laser welder 4, and an industrial camera 27 is fixedly connected to one end of the mounting bracket 26 away from the laser welder 4.

[0028] In the above embodiment, the industrial camera 27 continuously tracks the weld seam, and calculates the thermal expansion offset in real time based on the temperature of the aluminum welding substrate to dynamically correct the laser head movement trajectory.

[0029] Four support seats 28 are fixedly connected to the bottom of the base 1, and the four support seats 28 are located at the four corners of the bottom of the base 1.

[0030] In the above embodiments, the support base 28 enables the bottom of the device to be lifted off the ground, thereby improving moisture resistance and adaptability to terrain.

[0031] The controller 8 includes a device frame 29 fixedly connected to the upper side of the base 1. A control panel 30 is fixedly connected to the upper end of the device frame 29. The control panel 30 is electrically connected to the laser welder 4, the first electric actuator 11, the second electric actuator 15, the third electric actuator 23, the fourth electric actuator 25 and the industrial camera 27.

[0032] In this embodiment, the control panel 30 is responsible for the system control of the entire device, enabling centralized data collection and action control of the entire device, thus realizing the intelligence of the device.

[0033] The welding platform 2 is fixedly connected to four corners with bearing plates 31, and the bearing plates 31 located on the same side are distributed in a figure-eight shape.

[0034] In the above embodiments, the multiple support plates 31 provided can support the doors and windows, thereby improving the stability of the doors and windows.

[0035] The end of the positioning screw 14 away from the fixed seat 9 is rotatably connected to the pressure plate 33 via the bearing 32.

[0036] In the above embodiment, the pressure plate 33 can improve the clamping effect of the positioning screw 14 on the door and window, and can prevent the positioning screw 14 from causing damage to the surface of the door and window when it rotates.

[0037] A limiting plate 34 is fixedly connected to the upper side of the welding platform 2.

[0038] In the above embodiment, the limiting plate 34 can limit one side of the door or window, thereby improving the accuracy of positioning.

[0039] A precise alignment welding method for seamless welding of all-aluminum doors and windows includes the following steps: S1. Profile parameter input: Input the door and window frame dimensions, profile cross-section and wall thickness into the control panel 30. The control panel 30 will automatically retrieve the matching process parameters and welding reference trajectory. S2. Rough positioning of profiles: The door and window frame profiles are placed on welding platform 2, and the butt joints of the profiles are preliminarily positioned. S3. Synchronous pre-positioning and pre-clamping: The first electric push rod 11 drives the moving plate 12 and multiple positioning screws 14 to approach the door and window frame, and the positioning screws 14 squeeze, position and clamp the door and window frame profile. S4. Hydraulic pre-shaping: The second electric push rod 15 drives the clamping block 20 to move downward and contact the door and window frame profile, pressing the door and window frame from the vertical direction to complete the precise positioning of the door and window frame. S5. Precise visual alignment and correction: The industrial camera 27 scans the weld seam in three dimensions, the control panel 30 identifies the three-dimensional contour of the weld seam, calculates the three-axis offset and corrects the initial position of the laser welder 4, and controls the weld seam alignment error within 0.03mm. S6. Continuous seamless laser welding: The multi-axis drive assembly 3 drives the laser welder 4 to complete the welding of the four corners in sequence; during the welding process, the industrial camera 27 continuously tracks the weld seam, and calculates the thermal expansion offset in real time in combination with the temperature of the aluminum welding substrate, dynamically corrects the laser head movement trajectory, and realizes seamless welding of the door and window frame.

[0040] Working principle: During welding, the door and window frame is placed on the welding platform 2. The first electric push rod 11 drives the moving plate 12 to move. The moving plate 12 drives multiple positioning screws 14 to approach the door and window frame, thereby squeezing and positioning the door and window frame. The second electric push rod 15 drives two clamping blocks 20 to move downward. The two clamping blocks 20 press against both sides of the welding joint of the door and window frame, thereby improving the stability of the door and window frame during the welding process and preventing misalignment at the joint of the door and window frame. The control panel 30 controls the third electric push rod 23, the electric slide rail 22 and the fourth electric push rod 25 to work together to drive the laser welder 4 to move to the welding joint of the door and window frame for seamless welding. The control panel 30 adjusts the welding trajectory in real time according to the data returned by the industrial camera 27, thereby achieving precise and seamless welding of the door and window frame.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision alignment welding device for seamless welding of all-aluminum doors and windows, comprising a base (1), characterized in that: A welding platform (2) is fixedly connected to the upper side of the base (1). A multi-axis drive assembly (3) is fixedly connected to the upper side of the base (1). A laser welder (4) is installed on the multi-axis drive assembly (3). An image acquisition assembly (5) is fixedly connected to the vertical side wall of the laser welder (4). A vertical clamping mechanism (6) is installed on the laser welder (4). A lateral precision positioning mechanism (7) is fixedly connected to the front side of the base (1). A controller (8) is installed on the upper side of the base (1). The lateral precision positioning mechanism (7) includes a fixed base (9) fixedly connected to the base (1). The upper side of the fixed base (9) is provided with an installation groove (10). A first electric push rod (11) is fixedly connected in the installation groove (10). A moving plate (12) is fixedly connected to the output end of the first electric push rod (11). A plurality of internally threaded tubes (13) are fixedly connected to the vertical side wall of the moving plate (12). A positioning screw (14) is inserted into the internal thread of the internally threaded tube (13). Both ends of the positioning screw (14) extend out of the internally threaded tube (13).

2. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: The vertical clamping mechanism (6) includes a second electric push rod (15) fixedly connected to the laser welder (4). The output end of the second electric push rod (15) faces downward and is fixedly connected to a U-shaped connector (16). Both ends of the U-shaped connector (16) are fixedly connected to vertical rods (17). The lower end of the vertical rod (17) is fixedly connected to an installation rail (18). The bottom of the installation rail (18) is fixedly connected to a clamping block (20) by bolts (19). The head of the laser welder (4) is located between the two clamping blocks (20).

3. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: The multi-axis drive assembly (3) includes a guide rail (21) fixedly connected to the upper side of the base (1), an electric slide rail (22) movably sleeved on the guide rail (21), a third electric push rod (23) fixedly connected to the upper side of the base (1), the output end of the third electric push rod (23) fixedly connected to the electric slide rail (22), a slide table (24) slidably connected on the electric slide rail (22), a fourth electric push rod (25) fixedly connected to the front side of the slide table (24), and the laser welder (4) fixedly connected to the output end of the fourth electric push rod (25).

4. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: The image acquisition component (5) includes a mounting bracket (26) fixedly connected to the laser welder (4), and an industrial camera (27) is fixedly connected to one end of the mounting bracket (26) away from the laser welder (4).

5. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: The bottom of the base (1) is fixedly connected to four support seats (28), and the four support seats (28) are located at the four corners of the bottom of the base (1).

6. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: The controller (8) includes a device frame (29) fixedly connected to the upper side of the base (1). A control panel (30) is fixedly connected to the upper end of the device frame (29). The control panel (30) is electrically connected to the laser welder (4), the first electric actuator (11), the second electric actuator (15), the third electric actuator (23), the fourth electric actuator (25), and the industrial camera (27).

7. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: The welding platform (2) is fixedly connected to four corners with bearing plates (31), and the bearing plates (31) on the same side are distributed in a figure-eight shape.

8. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: The end of the positioning screw (14) away from the fixed seat (9) is rotatably connected to the pressure plate (33) via the bearing (32).

9. The precision alignment welding device for seamless welding of all-aluminum doors and windows according to claim 1, characterized in that: A limiting plate (34) is fixedly connected to the upper side of the welding platform (2).

10. A precise alignment welding method for seamless welding of all-aluminum doors and windows according to any one of claims 1-9, characterized in that: Includes the following steps: S1. Profile parameter input: Input the door and window frame dimensions, profile cross section and wall thickness in the control panel (30). The control panel (30) will automatically retrieve the matching process parameters and welding reference trajectory. S2, Profile rough positioning: The door and window frame profiles are placed on the welding platform (2), and the profile butt joints are butt jointed for preliminary positioning; S3, Synchronous pre-positioning and pre-clamping: The first electric push rod (11) drives the moving plate (12) and multiple positioning screws (14) to approach the door and window frame, and the positioning screws (14) squeeze, position and clamp the door and window frame profile; S4, Hydraulic pre-shaping: The second electric push rod (15) drives the clamping block (20) to move downward and contact the door and window frame profile, pressing the door and window frame from the vertical direction to complete the precise positioning of the door and window frame; S5. Visual precision alignment and correction: The industrial camera (27) scans the weld seam in three dimensions, the control panel (30) identifies the three-dimensional contour of the weld seam, calculates the three-axis offset and corrects the initial position of the laser welder (4), and controls the weld seam alignment error within 0.03mm. S6. Continuous seamless laser welding: The multi-axis drive assembly (3) drives the laser welder (4) to complete the welding of the four corners in sequence; during the welding process, the industrial camera (27) continuously tracks the weld seam, and calculates the thermal expansion offset in real time in combination with the temperature of the aluminum welding substrate, dynamically corrects the laser head movement trajectory, and realizes seamless welding of the door and window frames.

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