A laser welding platform for precision machining

Abstract

The application provides a laser welding platform for precision machining, and belongs to the technical field of laser welding. The laser welding platform comprises a welding table, two sealing cylinders, a piston assembly, a first driving assembly, a laser welding assembly, a second driving assembly and a gas storage assembly. The two sealing cylinders are fixedly arranged on the upper part of the welding table and oppositely distributed. The opposite sides of the two sealing cylinders are both in an open arrangement. The sides of the two sealing cylinders away from each other are both provided with through holes for the shaft workpiece to extend into. The laser welding assembly is rotatably arranged between the two sealing cylinders. The first driving assembly is installed on the upper part of the welding table. Compared with the prior art, the embodiment of the application can automatically fill inert gas into the welding seam periphery of the shaft workpiece when laser welding the shaft workpiece, so as to isolate air, improve the welding quality, and automatically recycle the inert gas after welding, thereby reducing the waste of inert gas.

Description

Technical Field

[0001] This invention belongs to the field of laser welding technology, specifically a laser welding platform for precision machining. Background Technology

[0002] Currently, when laser welding two shaft-like workpieces, a drive mechanism is needed to rotate the weld seam between the two shaft-like workpieces relative to the laser welding gun, and the laser welding gun is used to weld the two shaft-like workpieces into one piece.

[0003] In the above welding process, in order to prevent reactive gases such as oxygen and nitrogen from coming into contact with shaft workpieces and thus avoid defects such as cracks and porosity in the weld, it is necessary to supply inert gas to the weld of the shaft workpiece. The inert gas covers the welding area to form a physical barrier, thereby isolating the reactive gases. However, after the inert gas acts on the weld, it will directly escape outward. The escape of the inert gas will not only affect the isolation effect of the reactive gases and thus affect the welding quality, but also result in a large waste of inert gas. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a laser welding platform for precision machining.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A laser welding platform for precision machining includes a welding table, a sealing cylinder, a piston assembly, a first drive assembly, a laser welding assembly, a second drive assembly, and a gas storage assembly.

[0007] The sealing cylinder is provided in two sets, which are fixedly mounted on the upper part of the welding platform and distributed opposite to each other. The opposite side of each set of sealing cylinders is open, and the side of each set of sealing cylinders that is away from each other has a through hole for shaft-type workpieces to enter.

[0008] The laser welding assembly is rotatably positioned between the two sets of sealing cylinders.

[0009] The first drive assembly is mounted on the upper part of the welding platform and is used to drive the laser welding assembly to rotate.

[0010] The piston assembly is provided in two sets, and the two sets of piston assemblies are respectively movably disposed inside the two sets of sealing cylinders.

[0011] The second drive assembly and the gas storage assembly are disposed on the upper part of the welding platform.

[0012] The second drive assembly is used to drive the piston assembly to reciprocate along the inside of the sealing cylinder. When the piston assembly moves in one direction, it draws the inert gas in the gas storage assembly into the space between the two sets of sealing cylinders. When the piston assembly moves in another direction, it compresses the inert gas between the two sets of sealing cylinders into the gas storage assembly.

[0013] As a further improvement of the present invention: a support plate is fixedly provided on the upper part of the welding platform, and an annular gap is formed between the two sets of sealing cylinders.

[0014] The laser welding assembly includes a laser welding gun and a rotating ring.

[0015] The rotating ring is rotatably mounted on the outer walls of the two sets of sealing cylinders, and the laser welding gun is fixedly mounted on the inner wall of the rotating ring. The laser welding gun extends from the annular gap to the space between the two sets of sealing cylinders, and an external toothed ring is fixedly mounted on the outer wall of the rotating ring.

[0016] The first drive assembly includes a turntable, a motor, and a partially geared ring.

[0017] The motor is fixedly mounted on the side wall of the bracket plate, the turntable is mounted on the output end of the motor, and the incomplete gear ring is fixedly mounted on the outer circumference of the turntable and can mesh with the outer gear ring.

[0018] As a further improvement of the present invention: the piston assembly includes an annular piston plate, a tie rod, and an outer ring plate.

[0019] The annular piston plate is movably disposed inside the sealing cylinder, and the outer annular plate is disposed outside the sealing cylinder. One end of the pull rod is fixedly connected to the outer annular plate, and the other end penetrates the end sidewall of the sealing cylinder and extends into the sealing cylinder to be fixedly connected to the annular piston plate. The pull rod is hollow inside, and the annular piston plate has an air passage communicating with the inner cavity of the pull rod.

[0020] The gas storage assembly includes a gas storage tank and a flexible gas pipe.

[0021] The gas storage tank is fixedly installed on the upper part of the welding platform. One end of the flexible gas pipe is connected to the gas storage tank, and the other end is connected to the inner cavity of the pull rod.

[0022] As a further improvement of the present invention: the inner diameter of the two sets of annular piston plates is the same as the diameter of the two shaft-like workpieces.

[0023] As a further improvement of the present invention: the inner walls of the two sets of annular piston plates are provided with annular sealing rings.

[0024] As a further improvement to the present invention: the two sets of annular piston plates are connected to the inner walls of the two sets of sealing cylinders by elastic elements, and extension rods are fixedly provided on the side walls of the two sets of outer annular plates. The ends of the two sets of extension rods away from the corresponding outer annular plates extend to opposite sides of the turntable.

[0025] The second drive assembly includes two sets of C-type magnets and two sets of cylindrical magnets.

[0026] The two sets of C-shaped magnets are respectively fixedly installed on the opposite sidewalls of the turntable, and the two sets of cylindrical magnets are respectively fixedly installed at the ends of the two sets of extension rods. The two sets of cylindrical magnets can repel each other from the two sets of C-shaped magnets.

[0027] As a further improvement of the present invention: each of the two sets of annular piston plates has a receiving groove adapted to the laser welding gun on its opposite side. When the two sets of annular piston plates are in contact with each other, the two sets of receiving grooves are respectively sandwiched on the opposite sidewalls of the laser welding gun.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] In this embodiment of the invention, when two shaft-like workpieces need to be welded together, the ends of the two shaft-like workpieces can be inserted into the two sets of sealing cylinders through the through holes, respectively, so that the ends of the two shaft-like workpieces are joined between the two sets of sealing cylinders. At this time, an annular weld is formed between the two shaft-like workpieces. Then, the second driving component drives the two sets of piston assemblies to move in one direction along the inside of their respective sealing cylinders. At this time, the two sets of piston assemblies move away from each other, thereby drawing inert gas from the gas storage component into the space between the two sets of sealing cylinders. The inert gas acts on the outside of the annular weld. Subsequently, the first driving component drives the laser welding component to rotate relative to the two sets of sealing cylinders. In this process, the laser welding assembly is applied to a circumferential weld to weld two shaft-like workpieces together. After the two shaft-like workpieces are welded, the second drive assembly drives two sets of piston assemblies to move in another direction along the inside of their respective sealing cylinders. At this time, the two sets of piston assemblies approach each other, thereby pressing the inert gas inside the two sets of sealing cylinders back into the gas storage assembly, realizing the recovery of inert gas. Compared with the existing technology, when laser welding shaft-like workpieces, inert gas can be automatically filled into the outer periphery of the weld seam of the shaft-like workpieces to isolate air and improve welding quality. Furthermore, after welding is completed, the inert gas can be automatically recovered, thereby reducing the waste of inert gas. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of a laser welding platform for precision machining. Figure 1 ;

[0031] Figure 2A schematic diagram of the structure of a laser welding platform for precision machining. Figure 2 ;

[0032] Figure 3 This is a schematic diagram of two sets of annular piston plates in a laser welding platform for precision machining.

[0033] Figure 4 for Figure 1 Enlarged view of region A in the middle;

[0034] Figure 5 for Figure 3 Enlarged view of region B in the middle;

[0035] In the diagram: 10-Welding table, 101-Support plate, 20-Sealing cylinder, 30-Piston assembly, 301-Annular piston plate, 3011-Receiving groove, 302-Pull rod, 303-Elastic element, 304-Outer ring plate, 305-Extension rod, 40-First drive assembly, 401-Turntable, 402-Motor, 403-Incomplete gear ring, 50-Laser welding assembly, 501-Laser welding gun, 502-Rotating ring, 503-Outer gear ring, 60-Second drive assembly, 601-C-type magnet, 602-Cylindrical magnet, 70-Gas storage assembly, 701-Gas storage tank, 702-Flexible gas pipe. Detailed Implementation

[0036] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] Please see Figure 1 as well as Figure 2This embodiment provides a laser welding platform for precision machining, including a welding table 10, a sealing cylinder 20, a piston assembly 30, a first drive assembly 40, a laser welding assembly 50, a second drive assembly 60, and a gas storage assembly 70. Two sets of sealing cylinders 20 are provided, fixedly mounted on the upper part of the welding table 10 and distributed opposite each other. The opposite sides of both sets of sealing cylinders 20 are open, and the sides of both sets of sealing cylinders 20 that are far apart from each other have through holes for shaft-type workpieces to enter. The laser welding assembly 50 is rotatably mounted between the two sets of sealing cylinders 20. The first drive assembly 40 is mounted on the upper part of the welding table 10. The piston assembly 30 is used to drive the laser welding assembly 50 to rotate. There are two sets of piston assemblies 30, which are respectively movably disposed inside the two sets of sealing cylinders 20. The second drive assembly 60 and the gas storage assembly 70 are disposed on the upper part of the welding table 10. The second drive assembly 60 is used to drive the piston assembly 30 to reciprocate along the inside of the sealing cylinder 20. When the piston assembly 30 moves in one direction, it draws the inert gas in the gas storage assembly 70 into the space between the two sets of sealing cylinders 20. When the piston assembly 30 moves in another direction, it compresses the inert gas between the two sets of sealing cylinders 20 into the gas storage assembly 70.

[0039] When two shaft-like workpieces need to be welded together, the ends of the two shaft-like workpieces can be inserted into the two sets of sealing cylinders 20 through the through holes, so that the ends of the two shaft-like workpieces are joined between the two sets of sealing cylinders 20. At this time, an annular weld is formed between the two shaft-like workpieces. Then, the second drive assembly 60 drives the two sets of piston assemblies 30 to move in one direction along the inside of their respective sealing cylinders 20. At this time, the two sets of piston assemblies 30 move away from each other, thereby drawing inert gas from the gas storage assembly 70 into the space between the two sets of sealing cylinders 20. Inert gas acts on the outside of the annular weld seam. Then, the first drive component 40 drives the laser welding component 50 to rotate one revolution relative to the two sets of sealing cylinders 20. The laser welding component 50 acts on the annular weld seam to weld the two shaft-like workpieces into one piece. After the two shaft-like workpieces are welded, the second drive component 60 drives the two sets of piston components 30 to move in another direction along the inside of their respective sealing cylinders 20. At this time, the two sets of piston components 30 approach each other, thereby pressing the inert gas inside the two sets of sealing cylinders 20 back into the gas storage component 70, realizing the recovery of inert gas.

[0040] Please see Figure 1 as well as Figure 2In one embodiment, a support plate 101 is fixedly installed on the upper part of the welding table 10, and an annular gap exists between the two sets of sealing cylinders 20. The laser welding assembly 50 includes a laser welding gun 501 and a rotating ring 502. The rotating ring 502 is rotatably mounted on the outer wall of the two sets of sealing cylinders 20, and the laser welding gun 501 is fixedly mounted on the inner wall of the rotating ring 502. The laser welding gun 501 extends from the annular gap to the space between the two sets of sealing cylinders 20. An external gear ring 503 is fixedly installed on the outer wall of the rotating ring 502. The first drive assembly 40 includes a turntable 401, a motor 402, and an incomplete gear ring 403. The motor 402 is fixedly mounted on the side wall of the support plate 101, and the turntable 401 is mounted on the output end of the motor 402. The incomplete gear ring 403 is fixedly mounted on the outer circumference of the turntable 401 and can mesh with the external gear ring 503.

[0041] After the two sets of piston assemblies 30 are moved away from each other along their respective sealing cylinders 20 to draw inert gas from the gas storage assembly 70 into the two sets of sealing cylinders 20 so that the inert gas acts on the outside of the annular weld, the motor 402 drives the turntable 401 to rotate. The turntable 401 drives the incomplete gear ring 403 to rotate. When the incomplete gear 403 rotates to a certain angle, it meshes with the outer gear ring 503, which in turn drives the rotating ring 502 to rotate relative to the two sets of sealing cylinders 20. The rotating ring 502 drives the laser welding gun 501 to rotate around the annular weld between the two shaft-like workpieces to achieve welding between the two shaft-like workpieces. When the incomplete gear 403 disengages from the outer gear ring 503, the converter 502 drives the laser welding gun 501 to rotate one revolution. Thus, the welding between the two shaft-like workpieces is completed.

[0042] Please see Figure 1 as well as Figure 3 In one embodiment, the piston assembly 30 includes an annular piston plate 301, a pull rod 302, and an outer ring plate 304. The annular piston plate 301 is movably disposed inside the sealing cylinder 20, and the outer ring plate 304 is disposed outside the sealing cylinder 20. One end of the pull rod 302 is fixedly connected to the outer ring plate 304, and the other end passes through the end sidewall of the sealing cylinder 20 and extends into the sealing cylinder 20 to be fixedly connected to the annular piston plate 301. The pull rod 302 is hollow inside, and an air passage (not shown in the figure) communicating with the inner cavity of the pull rod 302 is provided on the annular piston plate 301. The gas storage assembly 70 includes a gas storage tank 701 and a flexible gas tube 702. The gas storage tank 701 is fixedly disposed on the upper part of the welding table 10, and one end of the flexible gas tube 702 is connected to the gas storage tank 701, and the other end communicates with the inner cavity of the pull rod 302.

[0043] Initially, the annular piston plates 301 corresponding to the two sets of piston assemblies 30 are in contact between the two sets of sealing cylinders 20. After the ends of the two shaft-like workpieces are joined between the two sets of sealing cylinders 20 to form an annular weld, the annular piston plates 301 corresponding to the two sets of piston assemblies 30 are respectively sleeved on the outside of the two shaft-like workpieces. At this time, the second drive assembly 60 drives the annular piston plates 301 corresponding to the two sets of piston assemblies 300 to move in one direction along the inside of their respective sealing cylinders 20, so that the two sets of annular piston plates 301 move away from each other. When the two sets of annular piston plates 301 move away from each other, the inert gas inside the gas storage tank 701 can be drawn into the pull rod 302 through the flexible gas tube 702 by the negative pressure. Then, the pull rod 302... The gas is drawn into the annular piston plate 301 and then enters the area between the two sets of annular piston plates 301 through the gas passage, thus acting on the outside of the annular weld. Subsequently, the motor 402 drives the turntable 401 to rotate, and with the meshing of the incomplete gear ring 403 and the external gear ring 503, the laser welding gun 501 rotates around the two shaft-like workpieces for one revolution, so as to weld the two shaft-like workpieces into one piece. Since the two sets of annular piston plates 301 are initially in a close contact state, when the two sets of annular piston plates 301 move away from each other to extract the inert gas, the extracted inert gas can fully act on the periphery of the annular weld, thereby effectively reducing the amount of air around the annular weld and improving the welding quality of the shaft-like workpieces.

[0044] After the inert gas is drawn into the area between the two sets of annular piston plates 301, in order to prevent the inert gas from leaking from the gap between the two sets of annular piston plates 301 and the two shaft-like workpieces, in one embodiment, the inner diameter of the two sets of annular piston plates 301 can be set to be the same as the diameter of the two shaft-like workpieces, so that when the two sets of annular piston plates 301 move along the inside of their respective sealing cylinders 20, the annular inner wall of the two sets of annular piston plates 301 is in close contact with the outer wall of the shaft-like workpiece, thereby avoiding inert gas leakage. In another embodiment, annular sealing rings can also be provided on the annular inner walls of the two sets of annular piston plates 301. By contacting the annular sealing rings with the outer wall of the shaft-like workpiece, a seal is achieved between the annular piston plates 301 and the outer wall of the shaft-like workpiece, thereby avoiding inert gas leakage.

[0045] Please see Figure 1 as well as Figure 2In one embodiment, the two sets of annular piston plates 301 are connected to the inner walls of the two sets of sealing cylinders 20 by elastic members 303. Extension rods 305 are fixedly provided on the side walls of the two sets of outer ring plates 304. The ends of the two sets of extension rods 305 away from the corresponding outer ring plates 304 extend to the opposite sides of the turntable 401. The second drive assembly 60 includes two sets of C-shaped magnets 601 and two sets of cylindrical magnets 602. The two sets of C-shaped magnets 601 are fixedly provided on the opposite side walls of the turntable 401, and the two sets of cylindrical magnets 602 are fixedly provided at the ends of the two sets of extension rods 305. The two sets of cylindrical magnets 602 can repel the two sets of C-shaped magnets 601 respectively.

[0046] After the ends of the two shaft-like workpieces are joined between the two sets of sealing cylinders 20 to form an annular weld, the motor 402 is started. The motor 402 drives the turntable 401, the incomplete gear ring 403, and the two sets of C-type magnets 601 to rotate synchronously. When the two sets of C-type magnets 601 rotate, they act on the sides of the two sets of cylindrical magnets 602 in advance. With the repulsive force between the C-type magnets 601 and the cylindrical magnets 602, the two sets of extension rods 305 are pushed away from each other. When the two sets of extension rods 305 move away from each other, they respectively drive the two... The outer ring plates 304 move away from each other. The two sets of outer ring plates 304, through corresponding tie rods 302, pull the two sets of annular piston plates 301 away from each other. This causes the inert gas inside the gas storage tank 701 to be drawn into the space between the two sets of annular piston plates 301 under negative pressure via the flexible gas pipe 702, the inner cavity of the tie rod 302, and the gas passage. This acts on the outside of the annular weld seam to provide protection for subsequent welding of shaft-type workpieces. During the process of the two sets of annular piston plates 301 moving away from each other, the corresponding elastic element 303 is compressed. After the two sets of annular piston plates 301 move away from a predetermined distance, the elastic thrust of the elastic element 303 on the annular piston plate 301 is equal to the repulsive force exerted by the C-type magnet 601 on the cylindrical magnet 602, thus balancing the forces on the annular piston plate 301. Subsequently, the incomplete gear ring 403 and the outer gear ring 503 enter a meshing state, thereby driving the rotating ring 502 and the laser welding gun 501 to rotate, so as to weld the two shaft-like workpieces. After the laser welding gun 501 rotates around the annular weld seam once, the incomplete gear ring 403... The external gear ring 503 disengages, and the opening of the C-type magnet 601 rotates to face the cylindrical magnet 602. The cylindrical magnet 602 is no longer repelled by the C-type magnet 601. The elastic element 303 pushes the annular piston plate 301 so that the two sets of annular piston plates 301 are close to each other. At this time, the inert gas located between the two sets of annular piston plates 301 is compressed and then enters the gas storage tank 701 in reverse through the air passage, the inner cavity of the pull rod 302 and the flexible air tube 702, thereby realizing the recovery of inert gas.

[0047] In one embodiment, the elastic element 303 can be a spring or a metal sheet, and there is no limitation on this.

[0048] Please see Figure 4 as well as Figure 5 In one embodiment, each of the two sets of annular piston plates 301 has a receiving groove 3011 adapted to the laser welding gun 501 on its opposite side. When the two sets of annular piston plates 301 are in contact with each other, the two sets of receiving grooves 3011 are respectively sandwiched on the opposite sidewalls of the laser welding gun 501.

[0049] Initially, the two sets of receiving grooves 3011 enclose the laser welding gun 501, allowing the two sets of annular piston plates 301 to fit together smoothly, thus preventing air from accumulating between them. When the two sets of C-shaped magnets 601 act on the sides of the two sets of cylindrical magnets 602, pushing the two sets of annular piston plates 301 away from each other, the receiving grooves 3011 on the two sets of annular piston plates 301 separate from the sidewalls of the laser welding gun 501. At the same time, the inert gas inside the gas storage tank 701 is extracted to the periphery of the annular weld. When the forces on the annular piston plates 301 are balanced, the incomplete toothed ring 403 and the outer... The gear ring 503 engages, thereby driving the laser welding gun 501 to rotate around the annular weld seam once, so as to weld the two shaft-like workpieces into one piece. After the two shaft-like workpieces are welded, the laser welding gun 501 rotates to the initial position, the incomplete gear ring 403 disengages from the outer gear ring 503, the opening of the C-type magnet 601 rotates to the side of the cylindrical magnet 602, and the elastic element 303 pushes the annular piston plate 301 so that the two sets of annular piston plates 301 approach each other, so as to push the inert gas back into the gas storage tank 701. When the two sets of annular piston plates 301 re-fit, the two sets of receiving grooves 3011 are clamped again on the side wall of the laser welding gun 501.

[0050] In this embodiment of the invention, when two shaft-like workpieces need to be welded together, the ends of the two shaft-like workpieces can be inserted into the two sets of sealing cylinders 20 through the through holes, so that the ends of the two shaft-like workpieces are joined between the two sets of sealing cylinders 20. At this time, an annular weld is formed between the two shaft-like workpieces. Then, the second driving component 60 drives the two sets of piston assemblies 30 to move in one direction along the inside of their respective sealing cylinders 20. At this time, the two sets of piston assemblies 30 move away from each other, thereby drawing inert gas from the gas storage component 70 into the space between the two sets of sealing cylinders 20. The inert gas acts on the outside of the annular weld. Subsequently, the first driving component 40 drives the laser welding component 50 relative to the two sets of sealing cylinders. As the laser welding assembly 50 rotates once, it acts on the circumferential weld seam to weld the two shaft-like workpieces into one piece. After the two shaft-like workpieces are welded, the second drive assembly 60 drives the two sets of piston assemblies 30 to move in another direction along the inside of their respective sealing cylinders 20. At this time, the two sets of piston assemblies 30 approach each other, thereby pressing the inert gas inside the two sets of sealing cylinders 20 back into the gas storage assembly 70, realizing the recovery of inert gas. Compared with the existing technology, when laser welding shaft-like workpieces, inert gas can be automatically filled into the outer periphery of the weld seam of the shaft-like workpieces to isolate air and improve welding quality. Furthermore, after welding is completed, the inert gas can be automatically recovered, thereby reducing the waste of inert gas.

[0051] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A laser welding platform for precision machining, characterized in that, It includes a welding station, a sealing cylinder, a piston assembly, a first drive assembly, a laser welding assembly, a second drive assembly, and a gas storage assembly. The sealing cylinder is provided in two sets, which are fixedly mounted on the upper part of the welding platform and distributed opposite to each other. The opposite side of each set of sealing cylinders is open, and the side of each set of sealing cylinders that is away from each other has a through hole for shaft-type workpieces to enter. The laser welding assembly is rotatably positioned between the two sets of sealing cylinders. The first drive assembly is mounted on the upper part of the welding platform and is used to drive the laser welding assembly to rotate. The piston assembly is provided in two sets, and the two sets of piston assemblies are respectively movably disposed inside the two sets of sealing cylinders. The second drive assembly and the gas storage assembly are disposed on the upper part of the welding platform. The second drive assembly is used to drive the piston assembly to reciprocate along the inside of the sealing cylinder. When the piston assembly moves in one direction, it draws the inert gas in the gas storage assembly into the space between the two sets of sealing cylinders. When the piston assembly moves in another direction, it compresses the inert gas between the two sets of sealing cylinders into the gas storage assembly.

2. The laser welding platform for precision machining according to claim 1, characterized in that, A support plate is fixedly installed on the upper part of the welding platform, and there is an annular gap between the two sets of sealing cylinders. The laser welding assembly includes a laser welding gun and a rotating ring. The rotating ring is rotatably mounted on the outer walls of the two sets of sealing cylinders, and the laser welding gun is fixedly mounted on the inner wall of the rotating ring. The laser welding gun extends from the annular gap to the space between the two sets of sealing cylinders, and an external toothed ring is fixedly mounted on the outer wall of the rotating ring. The first drive assembly includes a turntable, a motor, and a partially geared ring. The motor is fixedly mounted on the side wall of the bracket plate, the turntable is mounted on the output end of the motor, and the incomplete gear ring is fixedly mounted on the outer circumference of the turntable and can mesh with the outer gear ring.

3. The laser welding platform for precision machining according to claim 2, characterized in that, The piston assembly includes an annular piston plate, a tie rod, and an outer ring plate. The annular piston plate is movably disposed inside the sealing cylinder, and the outer annular plate is disposed outside the sealing cylinder. One end of the pull rod is fixedly connected to the outer annular plate, and the other end penetrates the end sidewall of the sealing cylinder and extends into the sealing cylinder to be fixedly connected to the annular piston plate. The pull rod is hollow inside, and the annular piston plate has an air passage communicating with the inner cavity of the pull rod. The gas storage assembly includes a gas storage tank and a flexible gas pipe. The gas storage tank is fixedly installed on the upper part of the welding platform. One end of the flexible gas pipe is connected to the gas storage tank, and the other end is connected to the inner cavity of the pull rod.

4. The laser welding platform for precision machining according to claim 3, characterized in that, The inner diameter of the two sets of annular piston plates is the same as the diameter of the two shaft-like workpieces.

5. A laser welding platform for precision machining according to claim 3, characterized in that, Both sets of annular piston plates have annular sealing rings on their inner annular walls.

6. A laser welding platform for precision machining according to claim 3, characterized in that, The two sets of annular piston plates are connected to the inner walls of the two sets of sealing cylinders by elastic elements. Extension rods are fixedly installed on the side walls of both sets of outer annular plates, with one end of each extension rod extending away from the corresponding outer annular plate to opposite sides of the turntable. The second drive assembly includes two sets of C-type magnets and two sets of cylindrical magnets. The two sets of C-shaped magnets are respectively fixedly installed on the opposite sidewalls of the turntable, and the two sets of cylindrical magnets are respectively fixedly installed at the ends of the two sets of extension rods. The two sets of cylindrical magnets can repel each other from the two sets of C-shaped magnets.

7. A laser welding platform for precision machining according to claim 3, characterized in that, Both sets of annular piston plates have receiving grooves on opposite sides that are adapted to the laser welding gun. When the two sets of annular piston plates are in contact with each other, the two sets of receiving grooves are respectively sandwiched on the opposite sidewalls of the laser welding gun.

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