Plastic laser welding machine

Abstract

The utility model belongs to the technical field of welding equipment, concretely relates to a kind of plastic laser welding machine, including rack and the laser welding device being connected to rack, at least one feeding device and at least one pressing device, feeding device includes Y-axis drive assembly and placing table, and placing table is drivingly connected with Y-axis drive assembly, and pressing device includes Z-axis drive assembly and light transmission pressing plate, and light transmission pressing plate is drivingly connected with Z-axis drive assembly, and light transmission pressing plate can be located between the laser head of laser welding device and placing table.The utility model can avoid the hand of worker into welding station by setting feeding device, then by pressing device to the plastic piece for compacting, plastic piece can be aligned, and the effect of welding is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of welding equipment, specifically relating to a plastic laser welding machine. Background Technology

[0002] Laser welding is a highly efficient and precise welding method that uses a high-energy-density laser beam as a heat source. It is an important application of laser materials processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is heat conduction type; the laser radiation heats the surface of the workpiece, and the surface heat diffuses inward through heat conduction. By controlling parameters such as the width, energy, peak power, and repetition frequency of the laser pulse, the workpiece is melted, forming a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts. Laser welding technology uses the heat generated by a laser beam to melt the plastic contact surfaces, thereby bonding thermoplastic sheets, films, or molded parts together.

[0003] Chinese utility model CN206718499U discloses a plastic laser welding machine, including a machine base panel, a frame, a control system, and a workpiece to be welded. The machine base panel, control system, and workpiece are respectively mounted on the frame. The machine base panel is equipped with a three-axis robot, a support, a welding fixture assembly, and a photoelectric safety protection device. The three-axis robot is mounted on the support. The welding fixture assembly is used to clamp the workpiece and includes a fixture base, a cylinder, and a pressure plate. The photoelectric safety protection device is used to protect the operator's safety and includes a safety light curtain, a laser protection plate, a support cylinder, and a connecting plate. This technical solution requires the operator to place the plastic part onto the welding station by hand or with a clamping tool. This operation method not only reduces production efficiency but also poses safety hazards.

[0004] Therefore, there is an urgent need to propose a new technical solution to address the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a plastic laser welding machine that addresses the shortcomings of existing technologies by feeding plastic parts into the welding station using a feeding device and then pressing the plastic parts with a pressing device to achieve positioning of the plastic parts and improve the welding effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A plastic laser welding machine includes a frame and a laser welding device connected to the frame, at least one feeding device and at least one pressing device. The feeding device includes a Y-axis drive assembly and a placement stage, the placement stage being drivenly connected to the Y-axis drive assembly. The pressing device includes a Z-axis drive assembly and a light-transmitting pressure plate, the light-transmitting pressure plate being drivenly connected to the Z-axis drive assembly, and the light-transmitting pressure plate being positioned between the laser head of the laser welding device and the placement stage.

[0007] Preferably, the frame is connected to at least one slide rail, the placement platform is connected to a slider, and the slider and the slide rail are slidably connected.

[0008] Preferably, a first buffer is disposed adjacent to one end of the slide rail, and a second buffer is disposed adjacent to the other end of the slide rail, with both the first buffer and the second buffer corresponding to the placement platform.

[0009] Preferably, the pressing device further includes a mounting plate, the end of which has a mounting hole, the light-transmitting pressing plate is disposed in the mounting hole, and the Z-axis drive assembly is connected to the mounting plate in a transmission manner.

[0010] Preferably, the frame is connected to a guide member, the mounting plate is connected to a sliding member, and the sliding member and the guide member are slidably connected.

[0011] Preferably, the guide member has a guide groove on its side, and the slider has a guide rail on its side, with the guide rail slidably connected to the guide groove.

[0012] Preferably, the frame is provided with an X-axis drive module, a Z-axis drive module and a Y-axis drive module. The X-axis drive module is connected to the frame, the Z-axis drive module is driven to the output end of the X-axis drive module, the Y-axis drive module is driven to the output end of the Z-axis drive module, and the laser welding device is driven to the output end of the Y-axis drive module.

[0013] Preferably, the X-axis drive module includes a first guide rail, a first connector, a first lead screw, and a first motor. The first guide rail is connected to the frame, the first connector is slidably connected to the first guide rail, the first lead screw is arranged parallel to the first guide rail and threadedly connected to the first connector, the first motor is mounted on the first guide rail and is drivenly connected to the first lead screw, and the first connector is connected to the Z-axis drive module.

[0014] Preferably, the top of the placement platform is provided with a positioning member, a support member, and a plurality of limiting members arranged around the positioning member, and the support member is disposed between the positioning member and the limiting members.

[0015] Preferably, the top of the frame is provided with a first station, a second station and a third station in sequence, and the first station, the second station and the third station are respectively provided with a feeding device and a pressing device.

[0016] Preferably, the Y-axis drive module includes a second guide rail, a second connector, a second lead screw, and a second motor. The second guide rail is driven by the Z-axis drive module. The second connector is slidably connected to the second guide rail. The second lead screw is arranged parallel to the second guide rail and threadedly connected to the second connector. The second motor is mounted on the second guide rail and driven by the second lead screw. The second connector is connected to the laser welding device.

[0017] The beneficial effects of this utility model are as follows: This utility model includes a frame and a laser welding device connected to the frame, at least one feeding device, and at least one pressing device. The feeding device includes a Y-axis drive assembly and a placement table. The placement table is used to place plastic parts and is slidably connected to the frame. The Y-axis drive assembly is connected to the frame, and the placement table is drively connected to the Y-axis drive assembly. The Y-axis drive assembly can be a telescopic cylinder assembly. One side of the placement table is connected to the telescopic rod end of the telescopic cylinder assembly, and the cylinder body of the telescopic cylinder assembly is connected to the frame. The pressing device includes a Z-axis drive assembly and a light-transmitting pressing plate. The Z-axis drive assembly... The light-transmitting pressure plate and Z-axis drive assembly are connected to the frame. There are four Z-axis drive assemblies, each positioned on one of the two opposite outer sides of the loading device. Two Z-axis drive assemblies are located on each outer side, and their positions correspond to each other. Alternatively, the Z-axis drive assembly can be a telescopic cylinder assembly. One side of the light-transmitting pressure plate is connected to the telescopic rod end of the telescopic cylinder assembly, and the cylinder body is connected to the frame. The light-transmitting pressure plate can be a quartz glass plate, positioned between the laser head and the placement stage of the laser welding device. The laser head and the transparent pressure plate are correspondingly positioned. Workers assemble multiple plastic parts on top of the placement stage. Then, the Y-axis drive assembly is activated to pull the placement stage to the welding station. After the placement stage enters the welding station, the Z-axis drive assembly is activated to drive the light-transmitting pressure plate downwards, pressing the assembled plastic parts firmly. Finally, the welding laser device is activated to weld the assembled plastic parts. This invention, by setting up a feeding device, can prevent workers' hands from entering the welding station, and then by using a pressing device to press the plastic parts, it can align the plastic parts and improve the welding effect. Attached Figure Description

[0018] Figure 1 This is one of the overall structural schematic diagrams of this utility model.

[0019] Figure 2 This is one of the exploded views of this utility model.

[0020] Figure 3 This is the second exploded view of this utility model.

[0021] Figure 4 This is a schematic diagram of the feeding device and pressing device of this utility model.

[0022] Figure 5 This is the second schematic diagram of the overall structure of this utility model.

[0023] The components include: 1. Frame; 11. First station; 12. Second station; 13. Third station; 2. Laser welding device; 3. Feeding device; 31. Y-axis drive assembly; 32. Placement table; 321. Positioning component; 322. Support component; 323. Limiting component; 33. Slide rail; 34. Slider; 35. First buffer; 36. Second buffer; 4. Pressing device; 41. Z-axis drive assembly; 42. Transparent pressure plate; 43. Mounting plate; 431. Installation plate. 432. Mounting hole; 44. Fixing component; 45. Guide component; 46. Guide groove; 47. Sliding component; 48. Guide rail; 59. X-axis drive module; 50. First guide rail; 51. First connecting component; 52. First lead screw; 53. First motor; 54. First motor; 60. Z-axis drive module; 71. Y-axis drive module; 72. Second connecting component; 73. Second lead screw; 74. Second motor; 80. First switch; 91. Second switch; 10. Safety light curtain. Detailed Implementation

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0028] The following is in conjunction with the appendix Figures 1-5 The present invention will be further described in detail with reference to specific embodiments, but this is not intended to limit the present invention.

[0029] Example 1 A plastic laser welding machine for welding plastic parts, see [link / reference]. Figures 1-4The system includes a frame 1, a laser welding device 2 connected to the top of the frame 1, at least one feeding device 3, and at least one pressing device 4. The feeding device 3 includes a Y-axis drive assembly 31 and a placement table 32. The placement table 32 is used to place plastic parts and is slidably connected to the top of the frame 1. The Y-axis drive assembly 31 is connected to the top of the frame 1, and one side of the placement table 32 is drivenly connected to the output end of the Y-axis drive assembly 31. The Y-axis drive assembly 31 can be a telescopic cylinder assembly. One side of the placement table 32 is connected to the telescopic rod end of the telescopic cylinder assembly, and the cylinder body of the telescopic cylinder assembly is connected to the top of the frame 1. The pressing device 4 includes a Z-axis drive assembly 41 and a light-transmitting pressing plate 42. The Z-axis drive assembly 41 is connected to the top of the frame 1. The top of the frame 1 is connected to one side of the light-transmitting pressure plate 42 and the output end of the Z-axis drive assembly 41. There are four Z-axis drive assemblies 41, which are respectively set on the two opposite outer sides of the feeding device 3. Two Z-axis drive assemblies 41 are set on each outer side, and the positions of the two outer Z-axis drive assemblies 41 correspond to each other. The Z-axis drive assembly 41 can also be a telescopic cylinder assembly. One side of the light-transmitting pressure plate 42 is connected to the telescopic rod end of the telescopic cylinder assembly. The cylinder body of the telescopic cylinder assembly is connected to the top of the frame 1. The light-transmitting pressure plate 42 can be a quartz glass plate. The light-transmitting pressure plate 42 can be located between the laser head of the laser welding device 2 and the placement stage 32. The laser head and the transparent pressure plate are set accordingly. Workers assemble multiple plastic parts on top of the placement platform 32, then activate the Y-axis drive assembly 31 to pull the placement platform 32 to the welding station. After the placement platform 32 enters the welding station, the Z-axis drive assembly 41 is activated to drive the light-transmitting pressure plate 42 downwards, pressing the assembled plastic parts firmly. Finally, the laser welding device 2 is activated to weld the assembled plastic parts. This invention uses the feeding device 3 to feed the plastic parts into the welding station, which avoids workers having to put their hands into the welding station to feed the parts, improving safety. Then, the pressing device 4 presses the plastic parts firmly, achieving positioning of the plastic parts and improving the welding effect.

[0030] In this embodiment, the frame 1 is connected to two slide rails 33, which are arranged along the Y-axis. The two slide rails 33 are arranged parallel to each other on the top of the frame 1. The placement platform 32 is connected to a slider 34, which is slidably connected to the slide rails 33. Through the cooperation of the slider 34 and the slide rails 33, the smooth movement of the placement platform 32 can be ensured, and misalignment of the unwelded parts between the plastic parts can be avoided during material loading.

[0031] In this embodiment, a first buffer 35 is arranged adjacent to one end of the slide rail 33, and two second buffers 36 are arranged adjacent to the other end of the slide rail 33. Both the first buffer 35 and the second buffer 36 are correspondingly arranged to the placement table 32. By setting the buffers, a buffering effect is achieved when the placement table 32 enters the welding station and returns to the loading station. The first buffer 35 is located at the loading station, and the two second buffers 36 are arranged adjacent to each other at the welding station. The presence of two second buffers 36 at the welding station enhances the buffering effect at the welding station, preventing the plastic parts to be welded from shaking and misaligning when entering the welding station. The welding station refers to the working position of the laser welding device 2, and the loading station refers to the position where the worker loads the parts.

[0032] In this embodiment, the pressing device 4 further includes a mounting plate 43. The end of the mounting plate 43 has a mounting hole 431. A light-transmitting pressing plate 42 is disposed in the mounting hole 431. The side wall of the mounting hole 431 has a step. A fixing member 432 for pressing the light-transmitting pressing plate 42 is provided at the mounting hole 431. The fixing member 432 has a ring structure. One side edge of the light-transmitting pressing plate 42 abuts against the surface of the step, and the other side edge of the light-transmitting pressing plate 42 abuts against the side of the fixing member 432. The fixing member 432 is connected to the mounting plate 43. The output end of the Z-axis drive assembly 41 is connected to the mounting plate 43 for transmission.

[0033] In this embodiment, the frame 1 is connected to a guide member 44, and the mounting plate 43 is connected to a sliding member 45. The sliding member 45 and the guide member 44 are slidably connected. Through the sliding engagement between the sliding member 45 and the guide member 44, the lifting and lowering of the mounting plate 43 can be made more stable.

[0034] In this embodiment, the guide member 44 is provided with a guide groove 441 on its side, which is arranged along the Z-axis direction. The slider 45 is provided with a guide rail 451 on its side, with one side of the guide rail 451 extending into the guide groove 441 and slidably connected to it. Through the cooperation between the guide rail 451 and the guide groove 441, the mounting plate 43 can move up and down smoothly.

[0035] In this embodiment, the slide rail 33, guide 44, Z-axis drive assembly 41, Y-axis drive assembly 31, first buffer 35 and second buffer 36 are all connected to the base, and one side of the base is connected to the top of the frame 1.

[0036] Example 2 This embodiment differs from Embodiment 1 in that the frame 1 is equipped with an X-axis drive module 5, a Z-axis drive module 6, and a Y-axis drive module 7. The X-axis drive module 5 is connected to the top of the frame 1, the Z-axis drive module 6 is driven by the output end of the X-axis drive module 5, the Y-axis drive module 7 is driven by the output end of the Z-axis drive module 6, and the laser welding device 2 is driven by the output end of the Y-axis drive module 7. The Z-axis drive module 6 can be a lifting cylinder module. This configuration allows the laser welding device 2 to move along the X, Y, and Z axes, making the welding process more flexible.

[0037] In this embodiment, the X-axis drive module 5 includes a first guide rail 51, a first connector 52, a first lead screw 53, and a first motor 54. The first guide rail 51 is arranged along the X-axis direction and is connected to the top of the frame 1. The first connector 52 is slidably connected to the first guide rail 51. The first lead screw 53 is arranged parallel to the first guide rail 51 and is threadedly connected to the first connector 52. The first motor 54 is mounted on the first guide rail 51, and the output shaft of the first motor 54 is drively connected to the first lead screw 53. The first connector 52 is connected to the Z-axis drive module 6. The first motor 54 drives the first lead screw 53 to rotate, and the first lead screw 53 drives the first connector 52 to slide on the first guide rail 51, so that the first connector 52 can drive the Z-axis drive module 6 to slide along the first guide rail 51.

[0038] In this embodiment, a positioning member 321, a support member 322, and a plurality of limiting members 323 are provided at the top center of the placement platform 32. The support member 322 is disposed between the positioning member 321 and the limiting members 323. The positioning member 321 is used to center the plastic part, the limiting members 323 are used to prevent the plastic part from slipping off the top of the placement platform 32, and the support member 322 is used to support the side of the plastic part so that the plastic part can be aligned for welding.

[0039] In this embodiment, the top of the frame 1 is sequentially provided with a first station 11, a second station 12, and a third station 13. Each of these stations is a welding station. A feeding device 3 and a pressing device 4 are respectively provided at each station. The feeding device 3 and pressing device 4 are correspondingly arranged at each station. A placement plate is provided on the top of the placement table 32, and the plastic parts are placed on the placement plate. With three stations, the plastic parts can be processed separately. The welding process involves three stages. The top of the placement platform 32 at the first station 11 is equipped with a support 322, while the tops of the placement platforms 32 at the second station 12 and the third station 13 are not equipped with support 322. The assembled plastic parts are welded sequentially at the first station 11, the second station 12, and the third station 13. The thickness of the placement plates at the first station 11, the second station 12, and the third station 13 decreases sequentially. The thickness of the plastic parts gradually increases during welding. This setup avoids the need to adjust the height of the laser welding device 2 relative to the frame 1.

[0040] In this embodiment, the Y-axis drive module 7 includes a second guide rail 71, a second connector 72, a second lead screw 73, and a second motor 74. The second guide rail 71 is arranged along the Y-axis direction, and one side of the second guide rail 71 is connected to the output end of the Z-axis drive module 6. The second connector 72 is slidably connected to the other side of the second guide rail 71. The second lead screw 73 is arranged parallel to the second guide rail 71 and is threadedly connected to the second connector 72. The second motor 74 is mounted on the second guide rail 71, and the output shaft of the second motor 74 is connected to the second lead screw 73. The second connector 72 is connected to the laser welding device 2. The second motor 74 drives the second lead screw 73 to rotate, and the second lead screw 73 drives the second connector 72 to slide on the second guide rail 71, so that the second connector 72 can drive the laser welding device 2 to slide along the second guide rail 71.

[0041] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0042] Example 3 The difference between this embodiment and Embodiment 1 is that, see [link to Embodiment 1] Figure 5 The outer side of the rack 1 is equipped with multiple baffles and cabinet doors to prevent dust from falling into the rack 1.

[0043] In this embodiment, the laser welding device 2, the feeding device 3, and the pressing device 4 are all electrically connected to the control system, which can be a PLC control system. A first switch 8 and a second switch 9 are provided on the outside of the frame 1. The control system is connected in series with the first switch 8 and the second switch 9. This arrangement requires the worker to press the first switch 8 and the second switch 9 simultaneously with both hands to start the equipment, which can prevent the worker from putting their hands into the frame 1 and ensure safety. A safety light curtain 10 is provided between the laser welding device 2, the feeding device 3, and the pressing device 4 and the first switch 8 and the second switch 9.

[0044] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0045] Obviously, this utility model includes a frame and a laser welding device connected to the frame, at least one feeding device, and at least one pressing device. The feeding device includes a Y-axis drive assembly and a placement table. The placement table is used to place plastic parts and is slidably connected to the frame. The Y-axis drive assembly is connected to the frame, and the placement table is drively connected to the Y-axis drive assembly. The Y-axis drive assembly can be a telescopic cylinder assembly. One side of the placement table is connected to the telescopic rod end of the telescopic cylinder assembly, and the cylinder body of the telescopic cylinder assembly is connected to the frame. The pressing device includes a Z-axis drive assembly and a light-transmitting pressure plate. The Z-axis drive assembly is connected to the frame. The light-transmitting pressure plate and the Z-axis drive assembly are connected by a transmission. There are four Z-axis drive assemblies, each positioned on one of the two opposite outer sides of the feeding device. Two Z-axis drive assemblies are located on each outer side, and their positions correspond to each other. The Z-axis drive assembly can also be a telescopic cylinder assembly. One side of the light-transmitting pressure plate is connected to the telescopic rod end of the telescopic cylinder assembly, and the cylinder body of the telescopic cylinder assembly is connected to the frame. The light-transmitting pressure plate can be a quartz glass plate and can be positioned between the laser head of the laser welding device and the placement stage. The laser head and the transparent pressure plate are correspondingly positioned. Workers assemble multiple plastic parts on top of the placement stage, then activate the Y-axis drive assembly to pull the placement stage to the welding station. After the placement stage enters the welding station, the Z-axis drive assembly is activated to drive the light-transmitting pressure plate downwards, pressing the assembled plastic parts firmly. Finally, the welding laser device is activated to weld the assembled plastic parts. This invention, by setting up a feeding device, can prevent workers' hands from entering the welding station, and then by using a pressing device to press the plastic parts, it can align the plastic parts and improve the welding effect.

[0046] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on the utility model are within the protection scope of the utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the utility model.

Claims

1. A plastic laser welding machine, characterized in that, The device includes a frame (1) and a laser welding device (2) connected to the frame (1), at least one feeding device (3) and at least one pressing device (4). The feeding device (3) includes a Y-axis drive assembly (31) and a placement stage (32). The placement stage (32) is drivenly connected to the Y-axis drive assembly (31). The pressing device (4) includes a Z-axis drive assembly (41) and a light-transmitting pressure plate (42). The light-transmitting pressure plate (42) is drivenly connected to the Z-axis drive assembly (41). The light-transmitting pressure plate (42) can be located between the laser head of the laser welding device (2) and the placement stage (32).

2. The plastic laser welding machine as described in claim 1, characterized in that, The frame (1) is connected to at least one slide rail (33), and the placement platform (32) is connected to a slider (34), the slider (34) and the slide rail (33) being slidably connected.

3. The plastic laser welding machine as described in claim 2, characterized in that, One end of the slide rail (33) is provided with a first buffer (35) adjacent to it, and the other end of the slide rail (33) is provided with a second buffer (36) adjacent to it. The first buffer (35) and the second buffer (36) are both provided corresponding to the placement platform (32).

4. The plastic laser welding machine as described in claim 1, characterized in that, The pressing device (4) also includes a mounting plate (43), the end of which has a mounting hole (431), the light-transmitting pressing plate (42) is disposed in the mounting hole (431), and the Z-axis drive assembly (41) is connected to the mounting plate (43) in a transmission connection.

5. The plastic laser welding machine as described in claim 4, characterized in that, The frame (1) is connected to a guide (44), and the mounting plate (43) is connected to a slider (45). The slider (45) and the guide (44) are slidably connected.

6. The plastic laser welding machine as described in claim 5, characterized in that, The guide member (44) has a guide groove (441) on its side, and the slider (45) has a guide rail (451) on its side. The guide rail (451) is slidably connected to the guide groove (441).

7. The plastic laser welding machine as described in claim 1, characterized in that, The frame (1) is provided with an X-axis drive module (5), a Z-axis drive module (6) and a Y-axis drive module (7). The X-axis drive module (5) is connected to the frame (1). The Z-axis drive module (6) is driven to the output end of the X-axis drive module (5). The Y-axis drive module (7) is driven to the output end of the Z-axis drive module (6). The laser welding device (2) is driven to the output end of the Y-axis drive module (7).

8. The plastic laser welding machine as described in claim 7, characterized in that, The X-axis drive module (5) includes a first guide rail (51), a first connector (52), a first lead screw (53), and a first motor (54). The first guide rail (51) is connected to the frame (1). The first connector (52) is slidably connected to the first guide rail (51). The first lead screw (53) is set parallel to the first guide rail (51) and threadedly connected to the first connector (52). The first motor (54) is mounted on the first guide rail (51) and is drivenly connected to the first lead screw (53). The first connector (52) is connected to the Z-axis drive module (6).

9. The plastic laser welding machine as described in claim 1, characterized in that, The top of the placement platform (32) is provided with a positioning member (321), a support member (322), and a plurality of limiting members (323) arranged around the positioning member (321). The support member (322) is arranged between the positioning member (321) and the limiting member (323).

10. The plastic laser welding machine as described in claim 1, characterized in that, The top of the frame (1) is provided with a first station (11), a second station (12) and a third station (13) in sequence. The first station (11), the second station (12) and the third station (13) are respectively provided with a feeding device (3) and a pressing device (4).

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