A laser welding fixture

Abstract

This invention relates to the field of clamping technology, specifically proposing a laser welding clamp, including a positioning component assembled on the inner wall of a main pipe and a branch pipe for positioning and clamping the branch pipe, and a base with grooves on its surface for placing the main pipe. This invention uses multiple positioning plates extending into the interior of the main pipe and branch pipe. These positioning plates, while clamping the branch pipe, also position the welding joint of the main pipe, ensuring accurate alignment of the main pipe and branch pipe. At this time, an internally rotating support frame and support plate support the top of the inner wall of the main pipe. The supporting force of the branch pipe is perpendicular to the supporting force of the main pipe, effectively preventing excessive pressure and deformation at the top of the branch pipe and the bottom of the main pipe, as well as deformation at the welding joint. During welding, the bottom of the branch pipe is located inside the groove, and the positioning of the main pipe and branch pipe does not rely on the downward pressure of the branch pipe. Therefore, the clamping force is much less than when clamped by downward pressure, effectively avoiding deformation problems.

Description

Technical Field

[0001] This invention relates to the field of fixture technology, and specifically proposes a laser welding fixture. Background Technology

[0002] As a key fluid transport component, the T-shaped pipe is used in multiple industrial fields. To ensure welding accuracy and stability, T-shaped pipes are usually equipped with special fixtures for laser welding. The base platform of the fixture includes at least two parts: a positioning module for the main pipe and a constraint module for the branch pipe. The commonly used positioning module is a V-shaped base, which uses the V-shaped groove on the V-shaped base to clamp and position the main pipe. The constraint module is a positioning post with a movable top. During welding, the main pipe is placed on the V-shaped base with the welding port on the pipe facing vertically. Then, the welding port of the branch pipe is aligned with the welding port of the main pipe, and the positioning post is driven to move down and abut against the top and inner wall of the branch pipe, so that the welding positions of the main pipe and the branch pipe are aligned. Finally, the V-shaped base or the positioning post is used as a driving source to make the main pipe and the branch pipe rotate and weld simultaneously.

[0003] However, during welding, the main pipe's support point is only the V-shaped base, and the branch pipe's support point is only the top positioning post. The welding joint position is positioned by the downward pressure of the positioning post and the upward support force of the V-shaped base. If the clamping force between the two is insufficient, the main pipe is prone to rotation and displacement on the surface of the V-shaped base due to the lack of constraint on the welding position, making it difficult to position the main pipe and branch pipe, which will greatly affect the welding quality. If the clamping force between the two is too large, the welding joint position of the main pipe and branch pipe, as well as the clamping position, are prone to deformation, especially for thin pipes with a diameter of about 10-30cm, where the deformation has a greater impact. Moreover, when the clamping force is too large, the pressure of the main pipe on the V-shaped base will also increase, and the friction force when the V-shaped base rotates will increase accordingly. If the positioning post is used as the driving source, its friction force is difficult to drive the bottom V-shaped base to rotate, which will cause slippage. The rotation of the main pipe and branch pipe is difficult to match with the movement of the welding torch, which will also greatly affect the welding quality.

[0004] Therefore, there is an urgent need for a laser welding fixture that can facilitate the positioning of main and branch pipes, prevent deformation of thinner pipe fittings during clamping, and avoid slippage during rotational welding. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a laser welding fixture, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a laser welding fixture for clamping the main pipe and branch pipe in a tee pipe, comprising a positioning component mounted on the inner wall of the main pipe and branch pipe for positioning and clamping the branch pipe, and a base with grooves on its surface for placing the main pipe. The positioning component includes multiple positioning plates arranged equidistantly in annular rings inside the branch pipe. The outer surfaces of the multiple positioning plates tightly press against the inner wall of the branch pipe and the outer surfaces of the multiple positioning plates tightly press against the inner wall of the connection port between the main pipe and the branch pipe. The top and bottom of the positioning component are equipped with adjusting components for controlling the circumferential diameter of the multiple positioning plates. A driving component is mounted inside the positioning plate, which drives a support frame to rotate and causes the support plate to adhere to the inner wall of the main pipe. Two symmetrically positioned positioning plates are equipped with arc-shaped rotatable support frames on their surfaces, and rotatable support plates are mounted at the ends of the support frames. The upper surface of the support plates abuts against the top of the inner wall of the main pipe. A longitudinally movable mounting frame is mounted on the surface of the base, and the positioning component is mounted below the mounting frame.

[0007] Preferably, the diameter adjustment assembly includes a frustum-shaped positioning block with multiple oblique grooves evenly spaced on its surface. The oblique grooves have a T-shaped cross-section. Each positioning block is equipped with a slider that matches the shape of the oblique groove. The slider is movably mounted on the inner wall of the oblique groove. A distance adjustment assembly for adjusting the distance is installed between two positioning blocks.

[0008] Preferably, the adjusting assembly includes a guide rod for ensuring the two positioning blocks are coaxial and for guiding them. The two ends of the guide rod movably pass through the two positioning blocks respectively. A threaded rod is coaxially mounted between the two positioning blocks. Both the guide rod and the threaded rod are mounted inside the mounting bracket. A motor for driving the threaded rod to rotate is mounted on the surface of the mounting bracket.

[0009] Preferably, an installation sleeve is fitted inside the positioning block, the installation sleeve is threaded onto the surface of the threaded rod, an installation bolt is fitted between the installation sleeve and the positioning block, and a countersunk hole is opened on the surface of the positioning block, with the installation sleeve located inside the countersunk hole.

[0010] Preferably, the surface of the corresponding positioning plate is provided with a through groove through which the support frame can pass, and the surface of the support frame is fitted with a connecting plate passing through the center of the support frame, and the connecting plate is rotatably fitted inside the through groove.

[0011] Preferably, the drive assembly includes a threaded rod II assembled inside the positioning plate, the lower end of the threaded rod II extending into the interior of the through groove, an adjusting ring being assembled on the surface of the threaded rod II, a connecting rod being hinged to the surface of the adjusting ring, one end of the connecting rod being hinged to the surface of the connecting plate, and the top of the threaded rod II extending to the outside of the positioning plate.

[0012] Preferably, the surface of the positioning plate is fitted with multiple arc-shaped guide rods for guidance, and the guide rods are slidably installed inside the support frame.

[0013] Preferably, the positioning plate is C-shaped, and the end shape of the positioning plate is adapted to the outer side shape of the positioning block.

[0014] Preferably, the surface of the base is symmetrically equipped with electric actuators for lifting the mounting frame, the output shaft of the electric actuators is mounted on the surface of the mounting frame, and the surface of the base is equipped with guide rods for guiding the mounting frame.

[0015] The above technical solution has the following advantages or beneficial effects: This invention provides a laser welding fixture, which, by setting multiple positioning plates extending into the main pipe and branch pipe, simultaneously positions the branch pipe and the welding joint of the main pipe, ensuring accurate alignment of the main pipe and branch pipe and guaranteeing welding quality. At this time, the internal support frame and support plate support the top of the inner wall of the main pipe. Since the supporting force of the branch pipe and the supporting force of the main pipe are perpendicular to each other and do not interact, it effectively avoids excessive pressure and deformation at the top of the branch pipe and the bottom of the main pipe, as well as deformation at the welding joint of the main pipe and branch pipe, ensuring the quality of the tee pipe. Although the bottom of the branch pipe is located inside the groove during welding, the positioning of the main pipe and branch pipe does not rely on the downward pressure of the branch pipe, so the clamping force is much less than that under downward pressure, effectively avoiding deformation at the bottom of the main pipe and the top of the branch pipe. During welding, the welding torch moves along the welding position path, thus avoiding slippage during rotation. Attached Figure Description

[0016] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0017] Figure 1 This is a three-dimensional structural diagram of a laser welding fixture provided by the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of a T-junction pipe being clamped in place.

[0019] Figure 3 This is a three-dimensional structural diagram of the positioning component in the clamping state.

[0020] Figure 4 This is a three-dimensional structural diagram of the positioning component holding the main tube.

[0021] Figure 5 This is a three-dimensional structural diagram of the positioning component clamping the branch pipe.

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the positioning component.

[0023] Figure 7 This is a three-dimensional structural diagram of the support frame in its installation state.

[0024] Figure 8 yes Figure 7 A planar schematic diagram of the orthographic section.

[0025] Figure 9 This is a schematic diagram showing the disassembled structure of the mounting sleeve and positioning block.

[0026] In the diagram: 1. Support frame; 2. Support plate; 3. Base; 4. Positioning assembly; 41. Positioning plate; 42. Diameter adjustment assembly; 421. Inclined slide groove; 422. Positioning block; 423. Slider; 43. Adjustment assembly; 431. Guide rod one; 432. Threaded rod one; 433. Motor one; 5. Mounting bracket; 6. Mounting sleeve; 7. Mounting bolt; 8. Drive assembly; 81. Threaded rod two; 82. Adjusting ring; 83. Connecting rod; 9. Countersunk hole; 10. Motor two; 11. Guide rod three; 12. Through groove; 13. Connecting plate; 14. Guide rod two; 15. Electric actuator. Detailed Implementation

[0027] 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.

[0028] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1-6 and Figure 9 The disclosed design discloses a laser welding fixture, primarily used for laser welding of tee pipes. It includes a positioning component 4 for simultaneously positioning and clamping the main pipe and branch pipes, and a base 3 for placing the main pipe. The base 3 has a groove on its surface, and the main pipe is placed directly inside the groove. The positioning component 4 is located inside the branch pipe and extends into the main pipe. In this embodiment, the positioning component 4 includes six positioning plates 41 with arc-shaped cross-sections. The six positioning plates 41 are equidistantly arranged circumferentially on the inner wall of the branch pipe. The outer surfaces of the positioning plates 41 are in close contact with the inner wall of the branch pipe and also with the inner wall of the weld joint of the main pipe. (See reference...) Figure 4From a top-down perspective, the weld joints of the main pipe and branch pipe are both circular. Since the inner walls of the weld joints of the main pipe and branch pipe are both attached to the surface of the positioning plate 41, and the positioning plate 41 is a completely vertically assembled arc plate, the weld joints of the main pipe and branch pipe can be aligned simultaneously to ensure the coaxiality of the weld joints, thereby ensuring good welding quality. The top and bottom of the positioning assembly 4 are equipped with diameter adjustment components 42, which are used to adjust the diameter of the six positioning plates 41 surrounding the main pipe. The interior of the positioning plate 41 is equipped with a drive component 8, which is used to adjust the rotation of the support frame 1. Only in this way can the support plate 2 after the support frame 1 rotates be attached to the inner wall of the main pipe.

[0030] The adjusting assembly 42 includes a frustum-shaped positioning block 422. Therefore, positioning blocks 422 are installed on the top and bottom of the positioning plate 41. The short diameter ends of the two positioning blocks 422 are installed opposite each other. The surface of the positioning block 422 is provided with six corresponding inclined grooves 421. The inclination angle of the inclined grooves 421 is the same as the inclination angle of the side of the positioning block 422. The top and bottom of the inner side of each positioning plate 41 are provided with an integrally formed slider 423. The positioning plate 41 and the slider 423 are integrally formed by casting. The inner side of the slider 423 is an inclined surface adapted to the inclined groove 421. The slider 423 is movably assembled inside the inclined groove 421. The cross-sectional shape of the slider 423 is T-shaped. The inner wall shape of the inclined groove 421 is adapted to the shape of the slider 423. It should be noted that the inclined groove 421 passes through the long diameter end but does not pass through the short diameter end.

[0031] When assembling the positioning plates 41, first insert the sliders 423 at the top of the six positioning plates 41 into the interior of the inclined grooves 421 from the long diameter end. Then, align the entrances of the six inclined grooves 421 at the long diameter end of the bottom positioning blocks 422 with the sliders 423 at the bottom of the positioning plates 41 and insert them. This effectively prevents the positioning blocks 422 and the positioning plates 41 from falling off. By assembling the adjusting component 43 between the two positioning blocks 422, the distance between the two positioning blocks 422 can be adjusted. This allows the inclined surfaces of the positioning blocks 422 during longitudinal movement to press against the sliders 423 of the positioning plates 41, thereby adjusting the circumferential diameter of the six positioning plates 41.

[0032] In this embodiment, the adjusting assembly 43 includes two guide rods 431, and the surfaces of the two positioning blocks 422 are each provided with two coaxial circular holes. The two guide rods 431 are slidably installed inside the two sets of corresponding coaxial circular holes. During assembly, it is necessary to ensure that the two positioning blocks 422 are coaxially assembled and remain coaxial during the movement of the positioning blocks 422. A threaded rod 432 is threaded between the two positioning blocks 422. It should be noted that the two threads of the threaded rod 432 are opposite. During the rotation of the threaded rod 432, the positioning blocks 422 are either moving away from or moving closer to each other. Only at this time can the two ends of the positioning plate 41 be adjusted synchronously.

[0033] To facilitate the installation of the adjustment assembly 43, the positioning block 422 is provided with a circular groove along the axial direction, and the mounting sleeve 6 is slidably assembled inside the circular groove. In this embodiment, four sets of mounting bolts 7 are threaded between each mounting sleeve 6 and the positioning block 422. It should be noted that the mounting bolts 7 are installed perpendicular to the surface direction of the positioning block 422, and the installation position is located in the middle of the positioning block 422 to ensure that the installation force of the positioning block 422 and the mounting sleeve 6 is balanced when the mounting bolts 7 are assembled. In order to prevent the mounting bolts 7 from affecting the movement of the positioning plate 41, a countersunk hole 9 is opened at the corresponding position of the positioning block 422, and the mounting bolts 7 are located inside the countersunk hole 9.

[0034] During assembly, first thread the two mounting sleeves 6 onto different threaded sections of the threaded rod 432. Then, install the assembled positioning plate 41 and positioning block 422 onto the surface of the mounting sleeve 6. After aligning the mounting positions of the mounting sleeve 6 and positioning block 422, install the mounting bolts 7 to fix them together. When disassembling and replacing the positioning plate 41, only the mounting bolts 7 need to be removed.

[0035] like Figure 1 As shown, the surface of the base 3 is provided with an arc-shaped groove, and the main pipe can be placed directly inside the arc-shaped groove. The surface of the base 3 can be fixedly mounted with electric actuators 15 through the rear flange. Two sets of electric actuators 15 are set at symmetrical positions on the main pipe. The mounting frame 5 is mounted on the top of the base 3. The output shaft end of the electric actuator 15 is fixedly connected to the mounting frame 5 through the front flange. In order to ensure that the mounting frame 5 can move axially stably, two guide rods 11 are provided on both sides of each electric actuator 15. The guide rods 11 are welded to the surface of the base 3. The mounting plates with round holes are provided on the welding surfaces on both sides of the mounting frame 5. The guide rods 11 are slidably installed inside the round holes of the mounting plates.

[0036] like Figures 2-4 As shown, the threaded rod 432 is rotatably mounted inside the mounting bracket 5 via a flange bearing. The flange bearing is bolted to both the threaded rod 432 and the mounting bracket 5. It should be noted that since the bearing needs to bear axial tensile force, an angular contact bearing is selected, and the tensile force range provided is obtained by those skilled in the art through multiple tests. It is capable of bearing the weight of the main pipe, branch pipe, and the clamp itself. The motor 433 is fixedly mounted on the surface of the mounting bracket 5 via a motor mount. The output shaft of the motor 433 is fixedly connected to the end of the threaded rod 432, and the rotation of the threaded rod 432 is driven by the motor 433.

[0037] like Figures 1-2 , Figures 6-8As shown, when assembling the positioning component 4, it is necessary to ensure that the connecting line of a symmetrical set of positioning plates 41 is parallel to the direction of the groove on the base 3. A through groove 12 is opened on the surface of the symmetrical positioning plate 41. An arc-shaped support frame 1 is provided inside the positioning plate 41. A connecting plate 13 is integrally cast on the surface of the support frame 1. The connecting plate 13 passes through the center position of the support frame 1. The connecting plate 13 is installed inside the through groove 12 through a rotating shaft. At this time, the support frame 1 can rotate around the rotating shaft. Multiple arc-shaped guide rods 14 are welded on the inner side of the positioning plate 41. A guide groove is opened on the corresponding support frame 1. The guide rods 14 are slidably installed inside the guide groove. One end of the support frame 1 extends through the through groove 12. An arc-shaped support plate 2 is movably hinged at this end. When the support frame 1 rotates, the upper surface of the support plate 2 abuts against the inner wall of the main pipe, providing support force for the main pipe.

[0038] At this point, the branch pipe is clamped by friction perpendicular to its axis, while the main pipe is clamped by the vertical upward support force of the support plate 2. Simultaneously, the positioning plate 41 extends from top to bottom into the interior of the main pipe, positioning and constraining the weld joint. The weld joint of the main pipe and branch pipe does not require excessive pressure to maintain stable connection. This not only avoids excessive pressure at the weld joint, preventing deformation of thinner pipes, but also eliminates excessive pressure at the bottom of the main pipe and the top of the branch pipe. Furthermore, it facilitates the alignment of the main pipe and branch pipe, ensuring accurate alignment and guaranteeing welding quality.

[0039] like Figures 7-8 As shown, the drive assembly 8 includes a threaded rod 81. A through vertical groove is opened on the top of the positioning plate 41, which communicates with the through groove 12. The threaded rod 81 is rotatably mounted inside the vertical groove via a bearing, and the lower end of the threaded rod 81 extends into the inside of the through groove 12. An adjusting ring 82 is threadedly sleeved on the surface of the threaded rod 81. A connecting rod 83 is hinged to the surface of the adjusting ring 82 via a hinge seat. The other end of the connecting rod 83 is hinged to the surface of the connecting plate 13 via the same hinge seat. A small motor 10 is mounted on the top of the positioning plate 41 via a motor. The motor 10 controls the rotation of the threaded rod 81. When the threaded rod 81 is rotated, the adjusting ring 82 can be controlled to move along the axial direction of the threaded rod 81. During the upward movement, the connecting plate 13 is pulled to rotate via the connecting rod 83, thereby causing the support frame 1 to rotate and retract to the surface of the positioning plate 41. During the downward movement, the support frame 1 rotates closer to the top of the inner wall of the main pipe, and the support plate 2 supports and positions the main pipe.

[0040] When welding, the welding torch is driven by an automatic welding device. The movement path of the welding torch is automatically controlled by the program inside the welding device. At this time, the welding torch can move along the welding path, and the main pipe and branch pipe do not need to rotate, thus effectively avoiding the problem of slippage during rotation.

[0041] This invention provides a laser welding fixture. The main pipe is placed in the groove of the base 3, and the welding port on the branch pipe is aligned with the welding port on the main pipe. The electric actuator 15 is activated, causing the mounting bracket 5 to move downwards, indirectly driving the positioning component 4 into the interior of the branch pipe until it is inserted into the interior of the main pipe. The motor 433 starts rotating forward, driving the threaded rod 432 to rotate, controlling the distance between the two positioning blocks 422. The slider 423 moves inside the inclined groove 421 until it abuts against the inner wall of the branch pipe, which is also against the inner wall of the welding port of the main pipe, achieving simultaneous positioning of both. At this time, the motor 10 drives the two symmetrical threaded rods 81 to control the adjusting ring 82. The position of the support frame 1 is adjusted so that the support plate 2 abuts against the top of the inner wall of the main pipe. When the threaded rod 81 is rotated continuously, the support plate 2 continues to support and move the main pipe upward, thereby ensuring that the welding joint of the main pipe and the branch pipe are in contact. The welding torch can move around the welding path of the base 3 through the automatic control of the program to achieve welding at the welding joint position. When the welding is finished, the motor 10 drives the threaded rod 81 to retract the support frame 1 to the surface of the positioning plate 41. Then, the motor 433 is controlled to reverse, and the distance between the two positioning blocks 422 is increased, and the circumferential diameter of the positioning plate 41 is reduced, so that the tee pipe can be easily removed.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A laser welding fixture for clamping the main pipe and branch pipe in a tee pipe, characterized in that: The system includes a positioning assembly mounted on the inner wall of the main pipe and branch pipe for positioning and clamping the branch pipe, and a base with grooves on its surface for placing the main pipe. The positioning assembly includes multiple positioning plates arranged equidistantly in annular arrangement inside the branch pipe. The outer surfaces of the multiple positioning plates are tightly pressed against the inner wall of the branch pipe and the inner wall of the communication port connecting the main pipe and the branch pipe. The top and bottom of the positioning assembly are equipped with adjustment components for controlling the circumferential diameter of the multiple positioning plates. A drive assembly is installed inside the positioning plates to drive the support frame to rotate and cause the support plate to fit against the inner wall of the main pipe. Two of the symmetrically positioned positioning plates are fitted with arc-shaped rotatable support frames on their surfaces. The ends of the support frames are fitted with rotatable support plates, and the upper surface of the support plates abuts against the top of the inner wall of the main pipe. The surface of the base is fitted with a longitudinally movable mounting bracket, and the positioning component is mounted below the mounting bracket. A through slot is provided on the surface of the positioning plate for the support frame to pass through. A connecting plate passing through the center of the support frame is mounted on the surface of the support frame. The connecting plate is rotatably mounted inside the through slot. The drive assembly includes a threaded rod II assembled inside the positioning plate. The lower end of the threaded rod II extends into the interior of the through groove. An adjusting ring is assembled on the surface of the threaded rod II. A connecting rod is hinged to the surface of the adjusting ring. One end of the connecting rod is hinged to the surface of the connecting plate. The top of the threaded rod II extends to the outside of the positioning plate. The surface of the positioning plate is fitted with multiple arc-shaped guide rods for guidance, which are slidably installed inside the support frame.

2. The laser welding fixture according to claim 1, characterized in that: The diameter adjustment assembly includes a frustum-shaped positioning block with multiple oblique grooves evenly spaced on its surface. The oblique grooves have a T-shaped cross-section. Each positioning block is equipped with a slider that matches the shape of the oblique groove. The slider is movably mounted on the inner wall of the oblique groove. A distance adjustment assembly for adjusting the distance is assembled between two positioning blocks.

3. A laser welding fixture according to claim 2, characterized in that: The adjustable distance assembly includes a guide rod for ensuring the two positioning blocks are coaxial and for guiding them. The two ends of the guide rod movably pass through the two positioning blocks respectively. A threaded rod is coaxially assembled between the two positioning blocks. Both the guide rod and the threaded rod are assembled inside the mounting frame. A motor for driving the threaded rod to rotate is assembled on the surface of the mounting frame.

4. A laser welding fixture according to claim 3, characterized in that: An installation sleeve is fitted inside the positioning block. The installation sleeve is threaded onto the surface of the threaded rod. An installation bolt is fitted between the installation sleeve and the positioning block. An indentation groove is formed on the surface of the positioning block, and the installation sleeve is located inside the indentation groove.

5. A laser welding fixture according to claim 2, characterized in that: The positioning plate is C-shaped, and the end shape of the positioning plate is adapted to the outer side shape of the positioning block.

6. A laser welding fixture according to claim 1, characterized in that: The surface of the base is symmetrically equipped with electric actuators for lifting the mounting frame. The output shaft of the electric actuator is mounted on the surface of the mounting frame. The surface of the base is equipped with guide rods for guiding the mounting frame.

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