Positioning equipment for laser marking of composite lightning protection connector
By designing the positioning equipment for laser marking of composite lightning protection joints, the automatic adjustment of transverse movement, lifting, rotating mechanism and magnetic clamping mechanism are adopted, combined with the cooling and purification mechanism, the problems of low positioning efficiency, insufficient accuracy and thermal stability in the prior art are solved, and efficient and accurate laser marking and optimized equipment stability are achieved.
Patent Information
- Application Number
- CN202510294440.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-04-29
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, the positioning efficiency of laser marking equipment is low, the accuracy is insufficient, and the heat dissipation and stability are difficult to take into account, making it difficult to adapt to the laser marking needs of special-shaped components such as composite lightning protection joints.
A positioning device for laser marking of composite lightning protection joints is designed, using the coordinated design of transverse components, lifting components, rotating mechanisms and magnetic clamping mechanisms. The workpiece is automatically adjusted in the X/Y/Z axis and rotation angle through servo motor drive, and combined with the cooling mechanism and purification mechanism, the heat dissipation efficiency and positioning accuracy are optimized.
It improves the efficiency and accuracy of laser marking, adapts to the complex geometric shape of the composite lightning protection joint, ensures the marking quality, and improves the stability and environmental performance of the equipment through optimized heat dissipation design.
Smart Images
Figure CN119897620A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of lightning protection joint processing, and in particular to a positioning device for laser marking of a composite lightning protection joint. Background Art
[0002] Composite lightning protection joints are a type of lightning protection device used in the fields of electricity, communications, etc. They are usually made of a composite of metal and non-metallic materials, and have both conductivity and insulation. The metal part is used to conduct lightning current, while the non-metallic part (such as rubber or engineering plastics) provides insulation protection and mechanical strength. Composite lightning protection joints are widely used in high-voltage transmission lines, communication base stations and other scenarios, and can effectively resist lightning strikes and reduce equipment damage. Due to their complex structure and high precision requirements, accurate positioning must be ensured during the laser marking process to avoid damaging the insulation layer or affecting the lightning protection performance.
[0003] Laser marking technology is widely used in the industrial field, especially in the marking of precision parts such as wire connectors and lightning protection devices, which requires ensuring positioning accuracy and stability. In the existing technology, the positioning mechanism of laser marking equipment mostly relies on manual adjustment or single-dimensional mechanical positioning, which has the following problems:
[0004] Low positioning efficiency: Traditional equipment needs to frequently adjust the workpiece position and laser height, which affects marking efficiency;
[0005] Insufficient precision: The workpiece is easily offset on the conveyor belt, resulting in deviation in the marking position. Especially for special-shaped parts such as composite lightning protection joints, existing positioning hoops or guide plates are difficult to adapt;
[0006] Conflict between heat dissipation and stability: The laser generates heat when working for a long time. Insufficient heat dissipation will lead to decreased stability of the equipment. However, the traditional heat dissipation mechanism and positioning function lack linkage design, making it difficult to balance efficiency and reliability. Summary of the invention
[0007] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a positioning device for laser marking of a composite lightning protection joint, which can solve the problems raised by the above-mentioned background technology.
[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning device for laser marking of a composite lightning protection joint, comprising a workbench, a laser marking machine, a mounting bracket, a cooling mechanism and a purification mechanism, the mounting bracket is mounted on the top of the workbench, the output end of the laser marking machine is vertically oriented toward the top of the workbench and is arranged on the mounting bracket, the cooling mechanism and the purification mechanism are both arranged on the mounting bracket and the cooling mechanism is connected to the output end of the laser marking machine, the cooling mechanism is used to dissipate heat from the output end of the laser marking machine, and the purification mechanism is used to purify the smoke generated during laser marking;
[0009] It also includes a transverse movement component, a lifting component, a rotating mechanism and a magnetic clamping mechanism. The transverse movement component is arranged on the surface of the workbench and distributed along the X-axis direction. The transverse movement component is used to drive the workpiece to move horizontally along the X-axis direction. The lifting component is arranged at the movable end position on the transverse movement component and is used to drive the workpiece to move along the Z-axis direction. The rotating mechanism is arranged above the lifting component and is used to drive the workpiece to rotate horizontally. The magnetic clamping mechanism is arranged on the rotating mechanism and is used to clamp and fix the workpiece.
[0010] Preferably, the transverse movement assembly includes a directional slide groove, a screw rod member, a slide body, a mounting table and a servo motor A. The surface of the workbench is integrally provided with a directional slide groove distributed along the X-axis direction. The cross-section of the directional slide groove is convex. A screw rod member is rotatably connected between the two end surfaces on the inner side of the directional slide groove. The slide body is threadedly connected to the screw rod member. The slide body is slidably installed in the directional slide groove. The top end surface of the slide body is integrally connected with the mounting table. A servo motor A is arranged on the side wall of the workbench. The output shaft of the servo motor A is fixedly connected to the end of the screw rod member through a coupling.
[0011] Preferably, the lifting assembly includes a servo motor B, a threaded rod, an internally threaded sleeve and a top plate. A servo motor B with an output shaft vertically facing upward is installed on the top of the mounting platform. The output shaft of the servo motor B is fixedly connected to the threaded rod through a coupling. The threaded rod is threaded with an internally threaded sleeve, and the top of the internally threaded sleeve is fixedly connected to the top plate. The lifting assembly also includes a guide tube and a guide rod. A plurality of groups of guide tubes distributed in a circular array are fixedly connected to the surface of the mounting platform. A guide rod is movably sleeved in the guide tube, and the top of the guide rod is fixedly connected to the bottom of the top plate.
[0012] Preferably, the rotating mechanism includes a mounting shell, a servo motor C and a rotating table. The mounting shell and the servo motor C are fixedly installed on the top of the top plate, the servo motor C is located on the inner side of the mounting shell, and the rotating table is rotatably installed on the top of the mounting shell. The output shaft of the servo motor C is fixedly connected to the rotating shaft connecting the rotating table and the mounting shell through a coupling. A slide rail linkage design is adopted, including a horizontal slide bar, a vertical lifting component and a rotating clamping assembly. It is driven by a servo motor to realize automatic adjustment of the workpiece in the X / Y / Z axis and the rotation angle, adapt to the complex geometric shape of the composite lightning protection joint, integrate flexible materials such as silicone pads and electromagnetic adsorption devices on the surface of the storage plate, and use a pressure sensor to feedback the clamping force in real time to prevent deformation or displacement of the metal and non-metal composite joints due to uneven force, thereby providing guarantee for the laser marking quality of the composite lightning protection joint.
[0013] Preferably, the magnetic suction clamping mechanism includes a strip table, an arc-shaped magnetic suction clamping plate, an electromagnet and a pressure sensor. The strip table is fixedly installed on the top of the rotating table. A slide groove is opened on the inner side of the strip table. Two groups of symmetrically distributed arc-shaped magnetic suction clamping plates are slidably installed in the slide groove inside the strip table. An electromagnet is fixedly installed at the bottom of the slide groove inside the strip table. The electromagnet is located between the two groups of arc-shaped magnetic suction clamping plates. The inner wall of the arc-shaped magnetic suction clamping plate is coated with a flexible material. The surfaces of the two groups of arc-shaped magnetic suction clamping plates are inlaid with pressure sensors. The composite lightning protection connector to be laser marked is fixedly installed on the bottom of the slide groove inside the strip table. The head is placed in the arc-shaped magnetic clamp on the strip table, and the electromagnet is controlled to drive the two sets of arc-shaped magnetic clamps to move to a position close to the electromagnet. The two sets of arc-shaped magnetic clamps clamp the composite lightning protection joint. The pressure sensor detects the clamping pressure in real time, and controls the servo motor C to drive the magnetic clamping mechanism and the rotation angle of the composite lightning protection joint thereon. The servo motor B is controlled to drive the composite lightning protection joint to rise and fall, and the servo motor A is controlled to drive the slide body and the composite lightning protection joint to move along the direction of the directional slide groove. The laser marking machine is controlled to perform laser marking on the composite lightning protection joint.
[0014] Preferably, the cooling mechanism includes a water tank, a circulation pump and a flexible coil. The water tank is mounted on the top of the mounting bracket and is filled with coolant. A circulation pump is arranged at the bottom of the water tank. A flexible coil that fits the output end of the laser marking machine is wound around the outer wall. The output end and input end of the circulation pump are respectively connected and communicated with the two ends of the flexible coil. The bottom of the water tank is connected and communicated with the flexible coil through a pipeline. The purification mechanism includes an air pump, a suction nozzle and an air filter. The air pump is mounted on the mounting bracket. The input end of the air pump is connected to the suction nozzle. The suction nozzle is located at On the side of the output end of the laser marking machine, the circulating pump is controlled to circulate coolant to take away the heat generated by the laser marking machine to achieve heat dissipation, and the air pump is controlled to purify the air. The input end of the air pump is connected to an air filter element. Through the coordinated design of the cooling mechanism and the purification mechanism, the water-cooling pipe is linked to the laser heat. When the laser temperature rises, the fine-tuning action of the lifting component is triggered by the thermistor sensor, and the heat dissipation efficiency and positioning accuracy are optimized simultaneously. Exhaust gas purification is integrated: an activated carbon filter device is added at the end of the heat dissipation pipe to absorb harmful gases generated by laser ablation.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] (1) The positioning equipment for laser marking of composite lightning protection joints adopts a slide rail linkage design through the coordinated design of a transverse movement component, a lifting component, a rotating mechanism and a magnetic suction clamping mechanism. It includes a horizontal slide bar, a vertical lifting component and a rotating clamping component. It is driven by a servo motor to realize automatic adjustment of the workpiece in the X / Y / Z axis and the rotation angle. It adapts to the complex geometric shape of the composite lightning protection joint. Flexible materials such as silicone pads and electromagnetic adsorption devices are integrated on the surface of the storage plate. The clamping force is fed back in real time by a pressure sensor to prevent deformation or displacement of the metal and non-metal composite joints due to uneven force, thereby providing a guarantee for the laser marking quality of the composite lightning protection joints.
[0017] (2) The positioning equipment for laser marking of composite lightning protection joints is designed with a cooling mechanism and a purification mechanism, and uses a water cooling pipe to link with the heat of the laser. When the temperature of the laser rises, the thermistor triggers the fine-tuning action of the lifting component, thereby simultaneously optimizing the heat dissipation efficiency and positioning accuracy. The exhaust gas purification is integrated: an activated carbon filter device is added at the end of the heat dissipation pipe to absorb harmful gases generated by laser ablation, thereby meeting the environmental protection requirements of the composite lightning protection joint production workshop. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments:
[0019] Figure 1 A perspective view of the present invention;
[0020] Figure 2 A top view of the present invention;
[0021] Figure 3 It is the AA cross-sectional view of the present invention;
[0022] Figure 4 A bottom view of the present invention;
[0023] Figure 5 It is an enlarged view of part A of the present invention;
[0024] Figure 6 It is an enlarged view of part B of the present invention;
[0025] Figure 7 It is a front view of the present invention.
[0026] Figure markings: workbench 1, laser marking machine 2, mounting bracket 3, transverse movement assembly 4, directional slide 41, screw rod 42, slide body 43, mounting table 44, servo motor A45, lifting assembly 5, servo motor B51, threaded rod 52, internal threaded sleeve 53, guide tube 54, guide rod 55, top plate 56, rotating mechanism 6, mounting shell 61, servo motor C62, rotating table 63, magnetic clamping mechanism 7, strip table 71, arc-shaped magnetic clamping plate 72, electromagnet 73, pressure sensor 74, cooling mechanism 8, water tank 81, circulation pump 82, flexible coil 83, purification mechanism 9, air pump 91, suction nozzle 92, air filter element 93, etc. DETAILED DESCRIPTION
[0027] See also Figure 1-7 The present invention provides a technical solution: a positioning device for laser marking of a composite lightning protection joint, comprising a workbench 1, a laser marking machine 2, a mounting bracket 3, a cooling mechanism 8 and a purification mechanism 9, wherein the mounting bracket 3 is mounted on the top of the workbench 1, the output end of the laser marking machine 2 is vertically oriented toward the top of the workbench 1 and is arranged on the mounting bracket 3, the cooling mechanism 8 and the purification mechanism 9 are both arranged on the mounting bracket 3 and the cooling mechanism 8 is connected to the output end of the laser marking machine 2, the cooling mechanism 8 is used to dissipate heat from the output end of the laser marking machine 2, and the purification mechanism 9 is used to It is used to purify the smoke generated during laser marking; it also includes a transverse movement component 4, a lifting component 5, a rotating mechanism 6 and a magnetic clamping mechanism 7. The transverse movement component 4 is arranged on the surface of the workbench 1 and is distributed along the X-axis direction. The transverse movement component 4 is used to drive the workpiece to move horizontally along the X-axis direction. The lifting component 5 is arranged at the active end position on the transverse movement component 4 and is used to drive the workpiece to move along the Z-axis direction. The rotating mechanism 6 is arranged above the lifting component 5 and is used to drive the workpiece to rotate horizontally. The magnetic clamping mechanism 7 is arranged on the rotating mechanism 6 and is used to clamp and fix the workpiece.
[0028] Among them, the transverse movement component 4 includes a directional slide groove 41, a screw rod 42, a slide body 43, a mounting table 44 and a servo motor A45. The surface of the workbench 1 is integrally provided with a directional slide groove 41 distributed along the X-axis direction. The cross section of the directional slide groove 41 is convex. The screw rod 42 is rotatably connected between the two end surfaces on the inner side of the directional slide groove 41. The slide body 43 is threadedly connected to the screw rod 42. The slide body 43 is slidably installed in the directional slide groove 41. The top end surface of the slide body 43 is integrally connected with the mounting table 44. A servo motor A45 is arranged on the side wall of the workbench 1. The output shaft of the servo motor A45 is fixedly connected to the end of the screw rod 42 through a coupling. The lifting component 5 includes a servo motor B5 1. A threaded rod 52, an internally threaded sleeve 53 and a top plate 56. A servo motor B51 with an output shaft vertically facing upward is installed on the top of the mounting platform 44. The output shaft of the servo motor B51 is fixedly connected to the threaded rod 52 through a coupling. The threaded rod 52 is threadedly connected to the internally threaded sleeve 53. The top of the internally threaded sleeve 53 is fixedly connected to the top plate 56. The lifting assembly 5 also includes a guide tube 54 and a guide rod 55. A plurality of groups of guide tubes 54 distributed in a circular array are fixedly connected to the surface of the mounting platform 44. The guide rod 55 is movably sleeved in the guide tube 54. The top of the guide rod 55 is fixedly connected to the bottom of the top plate 56. The rotating mechanism 6 includes a mounting shell 61, a servo motor C62 and a rotating platform 63. The top plate 5 6 is fixedly installed with a mounting shell 61 and a servo motor C62, the servo motor C62 is located on the inner side of the mounting shell 61, a rotating table 63 is rotatably installed on the top of the mounting shell 61, the output shaft of the servo motor C62 is fixedly connected to the rotating shaft connecting the rotating table 63 and the mounting shell 61 through a coupling, the magnetic suction clamping mechanism 7 includes a strip table 71, an arc-shaped magnetic suction clamping plate 72, an electromagnet 73 and a pressure sensor 74, a strip table 71 is fixedly installed on the top of the rotating table 63, a slide groove is opened on the inner side of the strip table 71, two groups of symmetrically distributed arc-shaped magnetic suction clamping plates 72 are slidably installed in the slide groove inside the strip table 71, an electromagnet 73 is fixedly installed at the bottom of the slide groove inside the strip table 71, and the electromagnet 73 is located Between the two groups of arc-shaped magnetic clamps 72, the inner wall of the arc-shaped magnetic clamps 72 is covered with flexible material, and the surfaces of the two groups of arc-shaped magnetic clamps 72 are inlaid with pressure sensors 74. Through the coordinated design of the transverse movement component 4, the lifting component 5, the rotating mechanism 6 and the magnetic clamping mechanism 7, a slide rail linkage design is adopted, including a horizontal slide bar, a vertical lifting component and a rotating clamping component. It is driven by a servo motor to realize automatic adjustment of the workpiece in the X / Y / Z axis and the rotation angle, adapt to the complex geometric shape of the composite lightning protection joint, integrate flexible materials such as silicone pads and electromagnetic adsorption devices on the surface of the storage plate, and use pressure sensors to feedback the clamping force in real time to prevent deformation or displacement of metal and non-metal composite joints due to uneven force.
[0029] Secondly, the cooling mechanism 8 includes a water tank 81, a circulation pump 82 and a flexible coil 83. The water tank 81 is installed on the top of the mounting bracket 3. The water tank 81 is filled with coolant. The bottom of the water tank 81 is provided with a circulation pump 82. The outer wall of the output end of the laser marking machine 2 is wound with a flexible coil 83 that fits therewith. The output end and the input end of the circulation pump 82 are respectively connected and communicated with the two ends of the flexible coil 83. The bottom of the water tank 81 is connected and communicated with the flexible coil 83 through a pipeline. The purification mechanism 9 includes an air pump 91, a suction nozzle 92 and an air filter 9 3. An air pump 91 is installed on the mounting bracket 3. The input end of the air pump 91 is connected to a suction nozzle 92. The suction nozzle 92 is located on the side of the output end of the laser marking machine 2. The input end of the air pump 91 is connected to an air filter element 93. The water cooling pipe is linked to the heat of the laser. When the temperature of the laser rises, the fine-tuning action of the lifting component is triggered by the thermistor sensor to simultaneously optimize the heat dissipation efficiency and positioning accuracy. Exhaust gas purification is integrated: an activated carbon filter device is added at the end of the heat dissipation pipe to absorb harmful gases generated by laser ablation to protect the surrounding environment and personnel safety.
[0030] Working principle: Place the composite lightning protection connector to be laser marked in the arc-shaped magnetic clamping plate 72 on the bar table 71, control the electromagnet 73 to drive the two sets of arc-shaped magnetic clamping plates 72 to move to the position close to the electromagnet 73, and the two sets of arc-shaped magnetic clamping plates 72 clamp the composite lightning protection connector, and the pressure sensor 74 detects the clamping pressure in real time;
[0031] Control the servo motor C62 to drive the magnetic clamping mechanism 7 and the composite lightning protection joint thereon to rotate, control the servo motor B51 to drive the composite lightning protection joint to rise and fall, control the servo motor A45 to drive the slide body 43 and the composite lightning protection joint to move along the directional slide groove 41, and control the laser marking machine 2 to perform laser marking on the composite lightning protection joint;
[0032] The circulating pump 82 is controlled to circulate the coolant to take away the heat generated by the laser marking machine 2 to achieve heat dissipation, and the air pump 91 is controlled to purify the air.
[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.
Claims
1. A positioning device for laser marking of a composite lightning protection joint, characterized in that: include: A workbench (1), a laser marking machine (2), a mounting bracket (3), a cooling mechanism (8) and a purification mechanism (9), wherein the mounting bracket (3) is mounted on the top of the workbench (1), the output end of the laser marking machine (2) is vertically oriented toward the top of the workbench (1) and is arranged on the mounting bracket (3), the cooling mechanism (8) and the purification mechanism (9) are both arranged on the mounting bracket (3) and the cooling mechanism (8) is connected to the output end of the laser marking machine (2), the cooling mechanism (8) is used to dissipate heat from the output end of the laser marking machine (2), and the purification mechanism (9) is used to purify smoke generated during laser marking; A transverse movement component (4), a lifting component (5), a rotating mechanism (6) and a magnetic clamping mechanism (7), wherein the transverse movement component (4) is arranged on the surface of the workbench (1) and is distributed along the X-axis direction, the transverse movement component (4) is used to drive the workpiece to move horizontally along the X-axis direction, the lifting component (5) is arranged at the movable end position on the transverse movement component (4) and is used to drive the workpiece to move along the Z-axis direction, the rotating mechanism (6) is arranged above the lifting component (5) and is used to drive the workpiece to rotate horizontally, and the magnetic clamping mechanism (7) is arranged on the rotating mechanism (6) and is used to clamp and fix the workpiece.
2. A positioning device for laser marking of a composite lightning protection joint according to claim 1, characterized in that: The transverse movement assembly (4) comprises a directional slide groove (41), a screw rod (42), a slide body (43), a mounting platform (44) and a servo motor A (45). The surface of the workbench (1) is integrally provided with a directional slide groove (41) distributed along the X-axis direction. The cross section of the directional slide groove (41) is in a convex shape. The screw rod (42) is rotatably connected between the two end surfaces on the inner side of the directional slide groove (41). The screw rod (42) is threadedly connected with the slide body (43). The slide body (43) is slidably installed in the directional slide groove (41). The top end surface of the slide body (43) is integrally connected with the mounting platform (44). The servo motor A (45) is arranged on the side wall of the workbench (1). The output shaft of the servo motor A (45) is fixedly connected to the end of the screw rod (42) through a coupling.
3. A positioning device for laser marking of a composite lightning protection joint according to claim 2, characterized in that: The lifting assembly (5) comprises a servo motor B (51), a threaded rod (52), an internally threaded sleeve (53) and a top plate (56). The top of the mounting platform (44) is provided with a servo motor B (51) with an output shaft vertically facing upwards. The output shaft of the servo motor B (51) is fixedly connected to the threaded rod (52) via a coupling. The threaded rod (52) is threadedly connected to the internally threaded sleeve (53). The top end of the internally threaded sleeve (53) is fixedly connected to the top plate (56).
4. A positioning device for laser marking of a composite lightning protection joint according to claim 3, characterized in that: The lifting assembly (5) further comprises guide tubes (54) and guide rods (55); a plurality of guide tubes (54) arranged in a circular array are fixedly connected to the surface of the mounting platform (44); guide rods (55) are movably sleeved inside the guide tubes (54); and the top ends of the guide rods (55) are fixedly connected to the bottom ends of the top plates (56).
5. The positioning device for laser marking of a composite lightning protection joint according to claim 4 is characterized in that: The rotating mechanism (6) comprises a mounting shell (61), a servo motor C (62) and a rotating table (63); the mounting shell (61) and the servo motor C (62) are fixedly mounted on the top of the top plate (56); the servo motor C (62) is located on the inner side of the mounting shell (61); the rotating table (63) is rotatably mounted on the top of the mounting shell (61); the output shaft of the servo motor C (62) is fixedly connected to the rotating shaft connecting the rotating table (63) and the mounting shell (61) through a coupling.
6. A positioning device for laser marking of a composite lightning protection joint according to claim 5, characterized in that: The magnetic attraction clamping mechanism (7) comprises a strip table (71), an arc-shaped magnetic attraction clamping plate (72), an electromagnet (73) and a pressure sensor (74); the strip table (71) is fixedly mounted on the top of the rotating table (63); a slide groove is provided on the inner side of the strip table (71); two groups of symmetrically distributed arc-shaped magnetic attraction clamping plates (72) are slidably mounted in the slide groove on the inner side of the strip table (71); an electromagnet (73) is fixedly mounted at the bottom of the slide groove on the inner side of the strip table (71); the electromagnet (73) is located between the two groups of arc-shaped magnetic attraction clamping plates (72); the inner wall of the arc-shaped magnetic attraction clamping plate (72) is coated with a flexible material; and the surfaces of the two groups of arc-shaped magnetic attraction clamping plates (72) are both inlaid with pressure sensors (74).
7. A positioning device for laser marking of a composite lightning protection joint according to claim 6, characterized in that: The cooling mechanism (8) comprises a water tank (81), a circulation pump (82) and a flexible coil (83). The water tank (81) is mounted on the top of the mounting bracket (3). The water tank (81) is filled with cooling liquid. The bottom of the water tank (81) is provided with a circulation pump (82). The outer wall of the output end of the laser marking machine (2) is wound with a flexible coil (83) that fits the output end. The output end and the input end of the circulation pump (82) are respectively connected and communicated with the two ends of the flexible coil (83). The bottom of the water tank (81) is connected and communicated with the flexible coil (83) through a pipeline.
8. The positioning device for laser marking of a composite lightning protection joint according to claim 7 is characterized in that: The purification mechanism (9) comprises an air pump (91), a suction nozzle (92) and an air filter element (93). The air pump (91) is installed on the mounting bracket (3). The input end of the air pump (91) is connected to the suction nozzle (92). The suction nozzle (92) is located on the side of the output end of the laser marking machine (2). The input end of the air pump (91) is connected to the air filter element (93).