Shell-shaped metal part laser welding device

Abstract

The invention relates to the technical field of laser welding equipment, and particularly discloses a shell-shaped metal part laser welding device which comprises a rack, a welding unit and a clamping unit, and the clamping unit comprises a rotary workbench and an outer shaping mold; the outer shaping mold is located above the rotary workbench, and a plurality of inner shaping columns and a plurality of supporting arms are fixed to the outer shaping mold. A pressing air bag is installed on the inner shaping column, and a cylinder is fixed to the supporting arm. A piston and a thrust spring are arranged in the cylinder, the piston is fixedly connected with a pull rod, and an inner cavity of the cylinder is communicated with the pressing air bag through an air path. And a rotary driving device and a linear driving device are arranged in the rack. The outer shaping die is matched with the rotary workbench, the shaping and clamping functions are achieved, welding of longitudinal seams of a frame body, butt seams of the frame body and a bottom plate and auxiliary parts can be completed at a time, repeated clamping is avoided, and the welding efficiency and precision consistency are remarkably improved; and the laser welding head can extend into the frame body to weld an inner side welding seam and auxiliary parts in the frame body, so that more comprehensive welding coverage is realized.

Description

Technical Field

[0001] This invention relates to the field of laser welding equipment technology, and in particular to a laser welding device for shell-shaped metal parts. Background Technology

[0002] Shell-shaped metal parts (such as various container shells, protective covers, etc.) are widely used in industrial fields, and their structures are usually as follows: Figure 1 As shown, it includes a frame 2 formed by metal sheets, a base plate 1 that mates with it, and auxiliary components. During processing, it is generally necessary to weld the longitudinal seams of the frame, the butt joints between the frame and the base plate, and the auxiliary components.

[0003] In current welding processes, the frame's structural stability is poor before longitudinal seam welding. Therefore, specialized fixtures are needed for temporary fixation and shaping. These fixtures are removed after the longitudinal seam welding is completed, and the frame and base plate must then be re-clamped for welding the butt joint. Furthermore, traditional fixtures are often enclosed with obstructions at the ends. If welding is required on both the inner and outer sides of a shell-like metal part, it's difficult to weld internal seams or concealed areas, often necessitating multiple adjustments to the workpiece clamping posture or fixture replacements. This segmented, multi-clamping method is cumbersome, inefficient, and prone to error accumulation, affecting welding position accuracy and structural shape consistency. Moreover, multi-position clamping often requires multiple sets of fixtures and drive mechanisms, resulting in bulky equipment, high costs, and significant energy consumption.

[0004] Therefore, there is an urgent need for a welding device that can perform multi-position welding of shell-shaped metal parts in a single clamping operation, and that combines high precision, high efficiency and compact structure, in order to meet the processing requirements of modern production for high quality and high efficiency. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention aims to provide a laser welding device for shell-shaped metal parts, so as to solve the technical problem of low efficiency and accuracy caused by the need to adjust the clamping state multiple times during the welding process of shell-shaped metal parts.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: A laser welding device for shell-shaped metal parts includes a frame, a welding unit, and a clamping unit; The welding unit includes an industrial robot mounted on a frame and a laser welding head mounted on the end flange of the industrial robot; The clamping unit includes a rotary worktable and an outer shaping mold. The rotary worktable is mounted on a frame and can rotate horizontally. Several positioning parts are fixed on its upper side. The outer shaping mold adopts a frame-shaped hollow structure and is located above the rotary worktable. Limiting steps are provided around its inner perimeter. Several inner shaping columns and several support arms are fixed on the outer shaping mold. A clamping airbag is installed on the inner shaping column, and there is a gap between the clamping airbag and the inner wall of the outer shaping mold. A vertically placed cylinder is fixed on the support arm. A piston and a thrust spring are arranged vertically inside the cylinder. A central hole is opened at the bottom, and an air hole is opened on the side. A downwardly extending pull rod is fixedly connected to the piston. The pull rod passes through the central hole and the two are in a sealed sliding fit. The lower end of the pull rod extends to the bottom of the rotary worktable. The air hole is located below the piston and communicates with the clamping airbag through an air passage. The frame is equipped with a rotary drive device that is connected to the rotary worktable, and a linear drive device that is connected to the lower end of the pull rod.

[0007] The working principle of this laser welding device for shell-shaped metal parts is as follows: In the initial state of the device, the outer shaping mold is in a high position. The base plate is placed on the rotary table and precisely positioned using the positioning unit. The frame is placed on the base plate, roughly directly below the outer shaping mold. The linear drive device drives the outer shaping mold downwards, gradually fitting it onto the outer periphery of the frame, while the inner shaping pillars are located inside the frame. When the limiting step contacts the upper end of the frame, the outer shaping mold stops moving downwards, and the piston moves downwards within the cylinder. Gas enters each clamping airbag through the gas passage, inflating the airbags and applying pressure to the inner side of the frame, forcing the frame to conform to the inner contour of the outer shaping mold, achieving precise shaping and positioning of the frame, thus completing the clamping and fixing. A laser welding head is used to weld the areas to be welded. After welding, the linear drive device drives the pull rod upwards, causing the piston to move upwards first, contracting the clamping airbags and releasing the clamping force on the frame. Subsequently, the outer shaping mold moves upwards, detaches from the frame, and returns to its initial high position. After the device returns to its initial state, the welded workpiece can be removed.

[0008] In a preferred embodiment, the outer forming mold is a polygonal frame structure, and the support arm is fixed to the outer corner of the outer forming mold.

[0009] In a preferred embodiment, a linear guide rail is mounted on the frame, and a slide and a drive mechanism for adjusting the position of the slide are mounted on the linear guide rail. The industrial robot is fixed on the slide.

[0010] In a preferred embodiment, the end of the support arm away from the outer forming mold is fixedly connected to a mounting base, the mounting base having a guide hole, the lower end of the cylinder being fixedly connected to the mounting base, and the pull rod passing through the guide hole and slidingly engaging with it.

[0011] In a preferred embodiment, the compression airbag is cylindrical and made of rubber-like elastic material. It is fitted onto the outside of the inner shaping column. Both ends of the compression airbag are sealed and fastened to the inner shaping column by fastening rings. The inner shaping column has a flow channel inside. One end of the flow channel is connected to the inner cavity of the compression airbag, and the other end is connected to the air hole on the side wall of the cylinder through an air passage. Furthermore, multiple compression airbags are arranged axially on the same inner shaping column.

[0012] In a preferred embodiment, the rotary table is fixedly connected to a vertically downward extending spindle, the spindle is rotatably connected to a bearing fixed on the frame, the output end of the rotary drive device is connected to the spindle drive, and the linear drive device is independently configured for each tie rod.

[0013] In a preferred embodiment, the lower ends of all the pull rods are fixedly connected to a timing frame, which is connected to the linear drive device. A base is provided below the rotary worktable, and the rotary worktable and the base are fixedly connected by several columns. The linear drive device is fixed on the base, and a vertically downward extending spindle is fixedly connected to the center of the base. The spindle is rotatably connected to a bearing fixed on the frame, and the output end of the rotary drive device is connected to the spindle.

[0014] Compared with the prior art, the laser welding device of the present invention has the following beneficial technical effects: 1. Through the combined clamping design of the external shaping mold and the rotary worktable, this device combines shaping and fixing functions, enabling the welding of the frame's longitudinal seams, the frame-base plate butt joints, and auxiliary components in a single clamping operation. This avoids repeated clamping operations and significantly improves welding efficiency and precision consistency. The external shaping mold has a hollow structure with an unobstructed upper end, allowing the laser welding head to extend into the frame to weld its inner seams and auxiliary components, expanding the welding reach and achieving more comprehensive welding coverage.

[0015] 2. Through the linkage design of the compression airbag and the thrust spring, uniform elastic pressure is applied to the frame and the base plate, which not only ensures the clamping stability and shape correction effect, but also avoids mechanical damage to the workpiece surface caused by rigid clamping.

[0016] 3. The lifting and lowering of the outer shaping mold and the inflation and deflation of the airbag are both driven by a linear drive device. The sequential action control is achieved through the linkage of components such as the cylinder, pull rod and piston, which effectively reduces the number of independent drive components, improves the compactness of the equipment structure, and reduces manufacturing costs and energy consumption. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0018] Figure 1 This is a schematic diagram of the structure of a common shell-shaped metal part.

[0019] Figure 2 This is a schematic diagram of the overall structure of the laser welding device in the embodiment.

[0020] Figure 3 This is a schematic diagram of the clamping unit in the embodiment.

[0021] Figure 4 This is a schematic diagram of the outer shaping mold and the inner shaping column in the embodiment.

[0022] Figure 5 This is a schematic diagram showing the state of the clamping unit when the external shaping mold is in a high position, as illustrated in the embodiment.

[0023] Figure 6 This is a schematic diagram showing the coordination state of the cylinder, pull rod, and piston when the outer and inner shaping molds are in a high position in the embodiment.

[0024] Figure 7 This is a schematic diagram of the mating structure of the clamping unit, frame and base plate in the clamping state of the embodiment.

[0025] Figure 8 This is a schematic diagram of the assembly structure of the cylinder, pull rod, and piston in the clamping state of the embodiment.

[0026] Figure 9 This is a schematic diagram of the assembly structure of the outer shaping mold, the inner shaping column, and the clamping airbag in the clamping state of the embodiment.

[0027] Figure 10 This is a schematic diagram showing the state of the laser welding device welding the workpiece in the embodiment.

[0028] Figure 11 This is a schematic diagram showing the arrangement of the linear drive device and the rotary drive device in another embodiment.

[0029] Figure label: 1-Base plate; 2-Frame; 3-Frame; 4-Linear guide rail; 5-Slide; 6-Base; 7-Industrial robot; 8-Laser welding head; 9-Drive mechanism; 10-Outer shaping mold; 11-Cylinder; 12-Tie rod; 13-Rotary worktable; 14-Positioning part; 15-Rotary drive device; 16-Shaft seat; 17-Main shaft; 18-Linear drive device; 19-Seat; 20-Support arm; 21-Air passage; 22-Inner shaping column; 23-Pressure airbag; 24-Air hole; 25-Guide hole; 26-Limiting step; 27-Flow channel; 28-Fasting ring; 29-Thrust spring; 30-Piston; 31-Base; 32-Column; 33-Synchronization frame. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 As shown, the shell-shaped metal laser welding device disclosed in the embodiment includes a frame 3, a welding unit, and a clamping unit.

[0032] Among them, such as Figure 1 , Figure 10 As shown, the welding unit includes an industrial robot 7 and a laser welding head 8; the industrial robot 7 adopts a multi-joint design and is mounted on the frame 3, and the laser welding head 8 is fixed to the flange at the end of the industrial robot 7; thus, the position and direction of the laser welding head 8 can be flexibly adjusted based on the industrial robot 7 to meet welding needs.

[0033] Among them, such as Figures 1-9As shown, the clamping unit includes a rotary worktable 13 and an outer shaping mold 10. The rotary worktable 13 is mounted on the frame 3 and can rotate horizontally. Several protruding positioning parts 14 are fixed to the upper side of the rotary worktable 13. When the base plate 1 is placed on the rotary worktable 13, the positioning parts 14 are distributed around the base plate 1 to achieve precise positioning of the base plate 1 and prevent displacement. The outer shaping mold 10 has a frame-shaped hollow structure. The inner contour of the outer shaping mold 10 is consistent with the outer contour shape of the frame 2. The outer shaping mold 10 is located above the rotary worktable 13. The outer mold 10 has limiting steps 26 around its inner perimeter, which are used to limit the upper end of the frame 2. Several inner shaping columns 22 and several support arms 20 are fixed on the outer mold 10. The inner shaping columns 22 are distributed along the inner side of the outer mold 10, and each inner shaping column 22 is equipped with a pressure airbag 23. There is a gap between the pressure airbag 23 and the inner wall of the outer mold 10. When the frame 2 is placed inside the outer mold 10, the inner shaping columns 22 are located inside the frame 2. When the pressure airbag 23 expands, it applies pressure to the frame 2, driving the frame 2 to contact the outer mold. The 10-piece fitting makes the shape of the frame 2 more standard to meet the design requirements. During implementation, the distribution position and number of the inner shaping columns 22 can be set according to the shape characteristics of the frame 2. For example, the inner shaping columns 22 can be set at key positions such as the corners and both sides of the longitudinal seams of the frame 2 to improve the shaping effect of the frame 2. The support arms 20 are distributed on the outside of the outer shaping mold 10, and each support arm 20 is fixed with a vertically placed cylinder 11. The cylinder 11 is cylindrical, with a piston 30 inside, a central hole at the bottom, and an air hole 24 on the side that communicates with the inner cavity of the cylinder 11. The piston 30 is sealed and slidably fitted with the inner wall of the cylinder 11. A thrust spring 29 is provided between the piston 30 and the bottom of the cylinder 11. The piston 30 is fixedly connected to a downwardly extending pull rod 12. The pull rod 12 passes through the central hole and the two are sealed and slidably fitted. The lower end of the pull rod 12 extends to the bottom of the rotary table 13. The air hole 24 is located on the lower side of the piston 30 and is connected to the compression airbag 23 through the air passage 21. Based on the above design, when the piston 30 moves downward, the gas on the lower side of the piston 30 in the cylinder 11 enters the compression airbag 23 through the air passage 21, driving the compression airbag 23 to expand.

[0034] Among them, such as Figure 2 , Figure 3 , Figure 5 As shown, a rotary drive device 15 and a linear drive device 18 are installed inside the frame 3; the rotary drive device 15 is connected to the rotary table 13 for adjusting the direction of the rotary table 13; the linear drive device 18 is connected to the lower end of the pull rod 12 for adjusting the vertical position of the pull rod 12.

[0035] This shell-shaped metal laser welding device is suitable for welding the frame 2, base plate 1, and auxiliary components. The specific usage method and working principle are as follows: 1. Device initialization like Figure 5 , Figure 6 As shown, the linear drive device 18 drives all the tie rods 12 to rise synchronously, moving the outer shaping mold 10 to the highest position, so that there is enough operating space between the outer shaping mold 10 and the rotary worktable 13, which facilitates the subsequent placement and alignment of the base plate 1 and the frame 2.

[0036] 2. Clamping and fixing of the workpiece like Figures 5-9 As shown, the base plate 1 is placed on the rotary table 13 and precisely positioned using the positioning part 14; the frame 2 is placed on the base plate 1 and positioned approximately directly below the outer forming mold 10; the linear drive device 18 drives all the tie rods 12 to move downwards synchronously, causing the outer forming mold 10 to move downwards, so that the outer forming mold 10 gradually fits onto the outer periphery of the frame 2, while the inner forming post 22 fixed to the inner side of the outer forming mold 10 enters the interior of the frame 2; when the limiting step 26 on the inner side of the outer forming mold 10 and the frame... After the upper end contacts, the outer shaping mold 10 stops moving downwards, the pull rod 12 continues to move downwards, and the piston 30 overcomes the thrust of the thrust spring 29 and moves downwards inside the cylinder 11, compressing the gas in the lower chamber of the piston 30. The gas enters each clamping airbag 23 through the air passage 21. The clamping airbag 23 expands and applies pressure to the inside of the frame 2, forcing the frame 2 to conform to the inner contour of the outer shaping mold 10, thus achieving precise shaping and positioning of the frame 2. At this time, the frame 2 is shaped and maintains stable contact with the base plate 1, completing the clamping and fixing. In the clamped state, a gap is maintained between the lower edge of the outer shaping mold 10 and the rotating worktable 13 to ensure that the seam between the frame 2 and the base plate 1 is fully exposed. At the same time, the longitudinal seam and other areas to be welded on the frame 2 correspond to the hollowed-out parts of the outer shaping mold 10, which facilitates the operation of the laser welding head 8.

[0037] 3. Laser welding like Figure 10 As shown, the industrial robot 7 adjusts the position and posture of the laser welding head 8 according to the welding path, while the rotating worktable 13 can adjust the position and direction of the workpiece. Thus, they work together to perform continuous and orderly welding on the parts to be welded.

[0038] 4. Unloading of the workpiece After welding is completed, the linear drive device 18 drives the pull rod 12 to move upward, and the piston 30 moves upward first, so that the gas in the pressure airbag 23 returns to the cylinder 11 through the air passage 21. The pressure airbag 23 contracts, releasing the pressure on the frame 2. Subsequently, the outer shaping mold 10 moves upward synchronously with the pull rod 12, detaches from the frame 2 and returns to the initial high position. After the device returns to the initial state, the workpiece that has been welded together can be taken out from the clamping unit.

[0039] In a specific implementation, the outer shaping mold 10 can be made into a frame structure with a corresponding contour according to the cross-sectional shape of the frame 2, such as rectangular, trapezoidal, or circular. When the outer shaping mold 10 is a polygonal frame structure, the support arm 20 is preferably fixed to the outer corner of the outer shaping mold 10. This arrangement can minimize the spatial interference caused by the support arm 20, the cylinder 11, and the tie rod 12 on the movement trajectory and welding field of the laser welding head 8 during the welding process.

[0040] Reference Figure 2 As shown in the specific implementation, to further improve the accessibility and adaptability of the laser welding head 8, a linear guide rail 4 can be installed on the frame 3. A slide 5 and a drive mechanism 9 for adjusting the position of the slide 5 are mounted on the linear guide rail 4. The base 6 of the industrial robot 7 is fixed to the slide 5. By controlling the slide 5 to move along the linear guide rail 4 through the drive mechanism 9, the overall position of the industrial robot 7 can be adjusted, thereby expanding the working range of the laser welding head 8 and adapting to more complex welding tasks.

[0041] Reference Figure 3 , Figure 4 As shown, in a specific implementation, to improve the structural rigidity and motion stability of the clamping unit, a mounting base 19 can be fixedly connected to the end of the support arm 20 away from the outer forming mold 10. A guide hole 25 is provided on the mounting base 19. The lower end of the cylinder 11 is fixedly connected to the mounting base 19, and the pull rod 12 passes through the guide hole 25 and slides with it. This guiding structure can effectively constrain the movement direction of the pull rod 12, enhancing the overall stability of the linkage mechanism composed of the pull rod 12, the cylinder 11, and the support arm 20.

[0042] In a specific implementation, the compression airbag 23 may employ an elastic expansion element known in the art. Preferably, such as Figure 4 , Figure 9 As shown, the compression airbag 23 is cylindrical and made of rubber-like elastic material. It is fitted onto the outside of the inner shaping column 22. Both ends of the compression airbag 23 are sealed and fastened to the inner shaping column 22 by fastening rings 28. The inner shaping column 22 has a flow channel 27 inside. One end of the flow channel 27 is connected to the inner cavity of the compression airbag 23, and the other end is connected to the air hole 24 on the side wall of the cylinder 11 through the air passage 21. To further improve the pressure uniformity and adaptability on the side wall of the frame 2, multiple compression airbags 23 can be arranged along the axial direction of the inner shaping column 22 according to the height of the frame 2, forming a multi-point balanced pressure structure.

[0043] In specific implementation schemes, the rotary drive device 15 and the linear drive device 18 can be configured using common methods in the prior art, and there are no technical obstacles in the implementation process. To improve the overall compactness and structural stability of the device, the following two implementation schemes are preferred: One is, such as Figure 3 As shown, a vertically downward extending main shaft 17 is fixedly connected to the center of the rotary worktable 13. The main shaft 17 is rotatably connected to the bearing seat 16 fixed on the frame 3 through a bearing assembly. The rotary drive device 15 can be a servo motor, and its output end is connected to the main shaft 17 through a coupling mechanism or a reduction mechanism, thereby driving the rotary worktable 13 to rotate around the vertical axis and realizing the controllable adjustment function of steering and speed. The linear drive device 18 adopts common linear actuators such as cylinders or electric cylinders. There are multiple linear drive devices 18, which are independently configured for each tie rod 12. The control system makes the linear drive devices 18 run synchronously to ensure the consistency of the movement of all tie rods 12.

[0044] Secondly, such as Figure 11 As shown, the lower ends of all the tie rods 12 are fixedly connected to a synchronous frame 33, and the synchronous frame 33 is connected to the linear drive device 18. Thus, the synchronous frame 33 is driven by a single linear drive device 18 to perform an overall lifting and lowering motion, thereby driving all the tie rods 12 to achieve high-precision synchronous displacement. A base 31 is provided below the rotary worktable 13. The rotary worktable 13 and the base 31 are fixedly connected by several columns 32. The linear drive device 18 is fixed on the base 31. A vertically downward extending main shaft 17 is fixedly connected to the center of the base 31. The main shaft 17 is rotatably connected to the bearing seat 16 fixed on the frame 3 through a bearing assembly. The output end of the rotary drive device 15 is connected to the main shaft 17.

[0045] 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.

[0046] 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.

Claims

1. A laser welding device for shell-shaped metal parts, comprising a frame, a welding unit, and a clamping unit, characterized in that: The welding unit includes an industrial robot and a laser welding head connected together; The clamping unit includes a rotary worktable and an outer shaping mold. The rotary worktable is mounted on a frame and can rotate horizontally. Several positioning parts are fixed on its upper side. The outer shaping mold adopts a frame-shaped hollow structure and is located above the rotary worktable. Limiting steps are provided around its inner perimeter. Several inner shaping columns and several support arms are fixed on the outer shaping mold. A clamping airbag is installed on the inner shaping column, and there is a gap between the clamping airbag and the inner wall of the outer shaping mold. A vertically placed cylinder is fixed on the support arm. A piston and a thrust spring are arranged vertically inside the cylinder. A central hole is opened at the bottom, and an air hole is opened on the side. A downwardly extending pull rod is fixedly connected to the piston. The pull rod passes through the central hole and the two are in a sealed sliding fit. The lower end of the pull rod extends to the bottom of the rotary worktable. The air hole is located below the piston and communicates with the clamping airbag through an air passage. The frame is equipped with a rotary drive device that is connected to the rotary worktable and a linear drive device that is connected to the lower end of the pull rod.

2. The laser welding apparatus for shell-shaped metal parts according to claim 1, characterized in that: The outer forming mold is a polygonal frame structure, and the support arm is fixed to the outer corner of the outer forming mold.

3. The laser welding apparatus for shell-shaped metal parts according to claim 1, characterized in that: The frame is equipped with a linear guide rail, and a slide and a drive mechanism for adjusting the position of the slide are mounted on the linear guide rail. The industrial robot is fixed on the slide.

4. The laser welding apparatus for shell-shaped metal parts according to claim 1, characterized in that: The end of the support arm away from the outer forming mold is fixedly connected to a mounting base, and a guide hole is provided on the mounting base. The lower end of the cylinder is fixedly connected to the mounting base, and the pull rod passes through the guide hole and slides with it.

5. The laser welding apparatus for shell-shaped metal parts according to claim 1, characterized in that: The compression airbag is cylindrical and made of rubber-like elastic material. It is fitted onto the outside of the inner shaping column. Both ends of the compression airbag are sealed and fastened to the inner shaping column by fastening rings. The inner shaping column has a flow channel inside. One end of the flow channel is connected to the inner cavity of the compression airbag, and the other end is connected to the air hole on the side wall of the cylinder through an air passage.

6. The laser welding apparatus for shell-shaped metal parts according to claim 5, characterized in that: Multiple compression airbags are arranged along the axial direction on the same inner shaping column.

7. The laser welding apparatus for shell-shaped metal parts according to claim 1, characterized in that: The rotary worktable is fixedly connected to a vertically downward extending main shaft, which is rotatably connected to a bearing fixed on the frame. The output end of the rotary drive device is connected to the main shaft for transmission, and the linear drive device is independently configured for each tie rod.

8. The laser welding apparatus for shell-shaped metal parts according to claim 1, characterized in that: The lower ends of all the tie rods are fixedly connected to a timing frame, which is then connected to the linear drive device.

9. The laser welding apparatus for shell-shaped metal parts according to claim 8, characterized in that: The rotary worktable is provided with a base below it, and the rotary worktable and the base are fixedly connected by several columns; the linear drive device is fixed on the base, and a vertically downward extending main shaft is fixedly connected to the center of the base. The main shaft is rotatably connected to a bearing fixed on the frame, and the output end of the rotary drive device is connected to the main shaft for transmission.

10. The laser welding apparatus for shell-shaped metal parts according to claim 1, characterized in that: In the clamping state, a gap is maintained between the lower edge of the outer shaping mold and the rotating worktable to ensure that the joint between the frame and the base plate is fully exposed, and the area to be welded on the frame corresponds to the hollow part of the outer shaping mold.

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