Laser processing device and method with synergistic effect of water jet and magnetic field

Abstract

The invention provides a water jet and magnetic field synergistic laser processing device and method. The device comprises a processing cabin, a three-dimensional movement mechanism, a millimeter laser, a water beam generation device and an adjustable magnetic field generation device. A workpiece clamping system is arranged in the processing cabin body, and magnetic field generating devices are arranged on two sides; the three-dimensional motion mechanism realizes three-dimensional space positioning of the millimeter laser; the water beam generating device and the millimeter laser are coaxially arranged, and a water circulation treatment system is arranged. The method comprises the steps of system initialization, workpiece clamping, laser positioning, magnetic field configuration, water jet parameter setting, combined machining and process monitoring. By integrating the high-precision three-dimensional motion mechanism, the adjustable magnetic field and the water jet device, precise positioning of a laser focus is achieved, the energy density of a laser beam is enhanced, slag such as effective scouring is achieved, a heat affected zone and environmental pollution are reduced, the machining quality and the surface smoothness are improved, and the machining efficiency is improved. And an efficient, environment-friendly and accurate machining solution is provided for the field of small hole machining.

Description

Technical Field

[0001] The present invention relates to the technical field of laser processing, and specifically refers to a laser processing device and method with the synergistic effect of water jet and magnetic field. Background Art

[0002] The laser processing small hole technology has become one of the key technologies in the small hole processing field due to its high precision and high efficiency. However, in practical applications, the problem of plasma accumulation often occurs during laser processing of small holes. Since the plasma is not ejected out of the hole sufficiently, plasma cloud accumulation is formed inside the hole, which seriously affects the absorption of laser energy at the lower part of the hole, thereby reducing the material removal rate. As the processing depth increases, the small hole gradually narrows, and the shielding effect of the hole wall on the laser beam becomes more obvious, making it difficult for the laser focus to reach the recast layer part at the lower end of the small hole, further restricting the processing efficiency and precision.

[0003] In addition, most of the fixtures of the existing laser processing centers only have positioning and clamping functions to ensure the stability and precision during the processing. However, the role of these fixtures in optimizing the processing technology is not significant, and they cannot effectively cope with challenges such as the heat affected zone, spatter, and hole diameter taper generated during laser processing of small holes. These problems not only affect the processing quality but may also have an adverse impact on the performance and precision of the final product. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above technical defects, and provide a laser processing device and method with the synergistic effect of water jet and magnetic field. This application combines a water jet system and a magnetic field generating device, aiming to effectively reduce plasma accumulation, heat affected zone, and hole diameter taper generated during laser processing of small holes through the scouring effect of the water jet and the guiding effect of the magnetic field, while reducing the generation of spatter, thereby improving the processing efficiency and precision.

[0005] To solve the above technical problem, the technical solution provided by the present invention is: a laser processing device with the synergistic effect of water jet and magnetic field, comprising:

[0006] A processing chamber, with a processing window provided at the top of the processing chamber, and a workpiece clamping system arranged inside it. Adjustable magnetic field generating devices are symmetrically arranged on both sides of the processing chamber;

[0007] A three-dimensional motion mechanism, including a Y-axis translation component arranged in parallel along both sides of the processing chamber, an X-axis translation component straddling the Y-axis translation component, and a Z-axis lifting component installed at the front end of the X-axis translation component;

[0008] A millimeter laser, which realizes three-dimensional space positioning through the Z-axis lifting component, and its optical axis is perpendicular to the workpiece processing surface;

[0009] The water beam generating device includes a water jet nozzle coaxially arranged with a millimeter laser, and a water circulation treatment system connected to the bottom of the processing chamber.

[0010] Furthermore, the workpiece clamping system includes two relatively arranged bearing platforms. The two ends of the workpiece are placed on the upper ends of the bearing platforms on both sides, and fixed pressing plates for pressing the ends of the workpiece are installed on the bearing platforms through pressing screws.

[0011] Furthermore, the water circulation treatment system includes:

[0012] A water tank;

[0013] A variable-frequency water pump, whose water suction end is communicated with the water tank through a water suction pipe, whose water outlet end is connected to the water jet nozzle through a high-pressure pipeline, and a pressure gauge is provided on the high-pressure pipeline;

[0014] A water treatment module, which includes a drain hole provided at the bottom of the processing cavity. A filter screen is installed at the drain hole through screws, and a drain pipe communicated with the water tank is provided at the lower end of the drain hole.

[0015] Furthermore, the adjustable magnetic field generating device includes a plurality of installation grooves spacedly opened on the outer side surface of the processing chamber, and neodymium iron boron permanent magnets are inserted into the installation grooves.

[0016] Furthermore, the Y-axis driving component includes Y-axis bases symmetrically arranged on both sides of the processing chamber. A longitudinal guide rail pair is configured on the Y-axis bases, and a gantry frame that can slide along the Y-axis is assembled on the longitudinal guide rail pair. A Y-axis ball screw drive mechanism is arranged inside the Y-axis bases. The Y-axis ball screw drive mechanism is threadedly connected to the bottom of the gantry frame through a Y-axis ball nut pair, and power is provided by a Y-axis servo drive motor arranged at the end of the Y-axis bases;

[0017] The X-axis driving component includes a horizontal installation platform fixed to the front end of the cross beam of the gantry frame. A horizontal guide rail pair and an X-axis screw drive mechanism are provided on the horizontal installation platform. A horizontal slide that can move along the X-axis is assembled on the horizontal guide rail pair. The horizontal slide is threadedly connected to the X-axis screw drive mechanism through an X-axis ball nut pair, and is driven by a Y-axis servo drive motor arranged at the end of the horizontal installation platform;

[0018] The Z-axis driving component includes a vertical installation substrate fixed to the front end of the horizontal slide. A vertical guide rail pair and a Z-axis screw drive mechanism are provided on the vertical installation substrate. A vertical slide that can lift along the Z-axis is assembled on the Z-axis screw drive mechanism. The millimeter laser is fixed to the vertical slide. The vertical slide is threadedly connected to the Z-axis screw drive mechanism through a Z-axis ball nut pair, and is driven by a Z-axis servo drive motor arranged at the top of the vertical installation substrate.

[0019] Further, the adjusting member includes a connecting plate connected to one side of the millimeter laser. A rotary motor is provided on the back of the connecting plate. The output shaft of the rotary motor is provided with a turntable located at the front end of the connecting plate. The water jet nozzle is installed at the front end of the turntable through a clamp.

[0020] The present application also provides a magnetic field-assisted water jet laser processing method, which specifically includes the following steps:

[0021] S1. System initialization: Start the Y-axis servo drive motor, X-axis servo drive motor, and Z-axis servo drive motor of the three-dimensional motion mechanism to establish a laser processing coordinate system;

[0022] S2. Workpiece clamping: Place the workpiece to be processed in the processing area of the bearing table, and realize double-end clamping and fixing through the fixed pressing plate and the pressing screw;

[0023] S3. Laser positioning: Adjust the focal length of the millimeter laser through the Z-axis lifting component, and combine the linkage movement of the X-axis translation component and the Y-axis translation component to accurately position the laser focus on the preset processing position on the surface of the workpiece;

[0024] S4. Magnetic field configuration: Select the number and arrangement method of neodymium iron boron permanent magnets according to the material characteristics, insert the neodymium iron boron permanent magnets into the installation grooves on both sides of the processing chamber to form a symmetric magnetic field, and use a gaussmeter to monitor the magnetic field strength distribution on the surface of the workpiece in real time, and adjust the permanent magnet array to obtain a preset gradient magnetic field of -.-T;

[0025] S5. Water jet parameter setting: Start the variable frequency water pump of the water circulation treatment system, monitor the pressure of the high-pressure pipeline through a pressure gauge, adjust the output water pressure to the range of 10-50 MPa, and synchronously adjust the jet inclination angle of the water jet nozzle to 15-60°;

[0026] S6. Composite processing: Activate the millimeter laser to generate a continuous / pulsed laser beam, synchronously turn on the water jet to form a coaxial protective gas curtain and a slag flushing flow, use the Lorentz force generated by the magnetic field to confine the plasma plume, and perform three-field collaborative processing of laser-water jet-magnetic field according to the preset trajectory through the three-dimensional motion mechanism;

[0027] S7. Process monitoring: Real-time collect the temperature field and pressure field data of the processing area, and dynamically adjust the laser power, water jet pressure, and magnetic field strength parameters to maintain a stable processing state.

[0028] The magnetic field cooperative water jet assisted laser processing equipment proposed in this application significantly optimizes the process effect of laser processing small holes compared with the prior art, and specifically solves multiple key problems mentioned in the background art. Specifically, through integrating a high-precision three-dimensional motion mechanism, the equipment realizes the micron-level positioning of a millimeter laser, ensuring that the laser focus can accurately act on any preset position on the workpiece surface, effectively avoiding the problem of insufficient absorption of laser energy caused by the shielding of the hole wall. At the same time, the introduction of an adjustable magnetic field generating device provides a flexible magnetic field environment for the processing process, significantly enhancing the energy density and penetration power of the laser beam, enabling efficient processing of difficult-to-machine materials and effectively reducing the aperture taper. In addition, the design of the water beam generating device not only effectively flushes the plasma through a high-pressure water jet, reducing the accumulation of the plasma cloud inside the hole, but also realizes the filtration and recycling of wastewater through a water circulation treatment system, reducing both the heat affected zone and environmental pollution. The optimized design of the workpiece clamping system ensures the stability and accuracy of the workpiece during the processing, avoiding errors caused by improper clamping. Finally, the adoption of a composite processing method combines the advantages of three technologies: laser processing, water jet cutting, and magnetic field assistance. By precisely controlling various parameters, it realizes the high-efficiency and high-precision processing of the workpiece surface, significantly improving the processing quality and surface finish. In summary, the equipment and method of this application specifically solve the problems in the prior art such as plasma accumulation, large heat affected zone, many splashes, and large aperture taper during laser processing of small holes, providing an efficient, environmentally friendly, and precise processing solution for the field of small hole processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a laser processing device with the cooperative action of a water jet and a magnetic field according to the present invention;

[0030] Figure 2 It is a schematic structural diagram of a processing chamber in a laser processing device with the cooperative action of a water jet and a magnetic field according to the present invention;

[0031] Figure 3 It is a schematic rear view structural diagram of a laser processing device with the cooperative action of a water jet and a magnetic field according to the present invention;

[0032] Figure 4 It is a flowchart of a magnetic field cooperative water jet assisted laser processing method according to the present invention;

[0033] As shown in the figure: 1. Processing chamber, 2. Y-axis translation assembly, 3. X-axis translation assembly, 4. Z-axis lifting assembly, 5. Millimeter laser, 6. Water jet nozzle, 7. Carrying platform, 8. Workpiece, 9. Pressing plate, 10. Water tank, 11. Variable frequency water pump, 12. High-pressure pipeline, 13. Pressure gauge, 14. Drain hole, 15. Filter screen, 16. Drain pipe, 17. Installation groove, 18. Neodymium iron boron permanent magnet, 19. Base, 20. Longitudinal guide pair, 21. Gantry frame, 22. Y-axis ball screw drive mechanism, 23. Y-axis servo drive motor, 24. Horizontal installation platform, 25. Horizontal guide pair, 26. X-axis screw drive mechanism, 27. Horizontal slide, 28. X-axis servo drive motor, 29. Vertical installation substrate, 30. Vertical guide pair, 31. Z-axis screw drive mechanism, 32. Vertical slide, 33. Z-axis servo drive motor, 34. Connecting plate, 35. Rotating motor, 36. Turntable. Detailed implementation manners

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] The specific implementation manners of the present invention will be further described below with reference to the accompanying drawings. Among them, the same components are denoted by the same reference numerals.

[0036] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0037] In order to make the content of the present invention easier to be clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] A laser processing device with the synergistic action of water jet and magnetic field, comprising:

[0039] A processing chamber 1, a processing window is provided at the top of the processing chamber 1, a workpiece clamping system is arranged inside it, and adjustable magnetic field generating devices are symmetrically arranged on both sides of the processing chamber 1;

[0040] A three-dimensional motion mechanism, including a Y-axis translation assembly 2 arranged in parallel on both sides of the processing chamber 1, an X-axis translation assembly 3 straddling the Y-axis translation assembly 2, and a Z-axis lifting assembly 4 installed at the front end of the X-axis translation assembly 3;

[0041] A millimeter laser 5, which realizes three-dimensional spatial positioning through the Z-axis lifting assembly 4, and the optical axis of which is perpendicular to the workpiece processing surface;

[0042] The water beam generating device includes a water jet nozzle 6 coaxially arranged with a millimeter laser 5, and a water circulation treatment system connected to the bottom of the processing chamber 1.

[0043] In one embodiment, the workpiece clamping system includes two oppositely arranged bearing platforms 7. The two ends of the workpiece 8 are placed on the upper ends of the bearing platforms 7 on both sides, and a fixed pressing plate 9 for pressing the end of the workpiece 8 is installed on the bearing platform 7 through a pressing screw. The workpiece clamping system is another major highlight of this equipment, and its design fully considers the stability requirements of the workpiece 8 during the processing. The double-bearing platform 7 structure ensures that both ends of the workpiece can be evenly stressed, avoiding deformation problems caused by single-point clamping. The combination of the fixed pressing plate 9 and the pressing screw not only provides a strong clamping force but also realizes precise clamping of workpieces with different shapes and sizes through the fine-tuning function. In addition, the surface of the bearing platform 7 is covered with wear-resistant and anti-slip materials, further improving the stability of the workpiece during processing.

[0044] In one embodiment, the water circulation treatment system includes: a water tank 10; a variable-frequency water pump 11, whose water suction end is connected to the water tank 10 through a water suction pipe, and whose water outlet end is connected to the water jet nozzle 6 through a high-pressure pipeline 12, and a pressure gauge 13 is provided on the high-pressure pipeline 12; a water treatment module, including a drain hole 14 provided at the bottom of the processing cavity, a filter screen 15 is installed at the drain hole 14 through a screw, and a drain pipe 16 communicating with the water tank 10 is provided at the lower end of the drain hole 14. The optimized design of the workpiece clamping system is not only reflected in its stability and precision but also in its significant improvement in processing efficiency. The precision machining and surface treatment of the bearing platform 7 ensure that the workpiece 8 can maintain its original geometric precision during clamping, avoiding errors caused by improper clamping. The design of the fixed pressing plate 9 fully considers the hardness of the workpiece material and the thermal expansion problem during processing, and uses materials with high strength and low thermal expansion coefficient to ensure the stability of the workpiece during processing.

[0045] The water circulation treatment system is the key to realizing efficient and environmentally friendly processing of this equipment. The water tank 10, as the water source of the system, adopts a large-capacity design to ensure the continuous water supply demand for long-term processing. The introduction of the variable-frequency water pump 11 not only realizes the stable supply of water flow but also realizes the precise control of the water flow pressure through frequency conversion adjustment. The precise connection between the high-pressure pipeline 12 and the water jet nozzle 6 ensures that the water jet can accurately and efficiently act on the workpiece surface. The real-time monitoring of the pressure gauge 13 ensures that the pressure of the water jet always remains within the most suitable range, avoiding processing quality problems caused by excessive or too low pressure. The combination of the drain hole 14 and the filter screen 15 realizes the effective filtration and recycling of waste water and impurities generated during processing, saving water resources and reducing environmental pollution.

[0046] In one embodiment, the adjustable magnetic field generating device includes a plurality of mounting grooves 17 spacedly formed on the outer side surface of the processing chamber 1, and neodymium iron boron permanent magnets 18 are inserted into the mounting grooves 17.

[0047] In one embodiment, the Y-axis drive assembly includes Y-axis bases 19 symmetrically arranged on both sides of the processing chamber 1. A longitudinal guide pair 20 is configured on the Y-axis bases 19. A gantry frame 21 that can slide along the Y-axis is assembled on the longitudinal guide pair 20. A Y-axis ball screw drive mechanism 22 is provided inside the Y-axis bases 19. The Y-axis ball screw drive mechanism 22 is threadedly connected to the bottom of the gantry frame 21 through a Y-axis ball nut pair and is powered by a Y-axis servo drive motor 23 provided at the end of the Y-axis bases 19; the X-axis drive assembly includes a horizontal mounting platform 24 fixed to the front end of the cross beam of the gantry frame 21. A horizontal guide pair 25 and an X-axis screw drive mechanism 26 are provided on the horizontal mounting platform 24. A horizontal slide 27 that can move along the X-axis is assembled on the horizontal guide pair 25. The horizontal slide 27 is threadedly connected to the X-axis screw drive mechanism 26 through an X-axis ball nut pair and is driven by the Y-axis servo drive motor 23 provided at the end of the horizontal mounting platform 24; the Z-axis drive assembly includes a vertical mounting substrate 29 fixed to the front end of the horizontal slide 27. A vertical guide pair 30 and a Z-axis screw drive mechanism 31 are provided on the vertical mounting substrate 29. A vertical slide 32 that can lift along the Z-axis is assembled on the Z-axis screw drive mechanism 31. The millimeter laser 5 is fixed to the vertical slide 32. The vertical slide 32 is threadedly connected to the Z-axis screw drive mechanism 31 through a Z-axis ball nut pair and is driven by a Z-axis servo drive motor 33 provided at the top of the vertical mounting substrate 29. The three-dimensional motion mechanism in this application is the key to ensuring that the millimeter laser can be accurately positioned at any position on the workpiece surface. This mechanism mainly consists of a Y-axis translation assembly 2, an X-axis translation assembly 3, and a Z-axis lifting assembly 4, forming an all-round and high-precision three-dimensional moving platform. Both the Y-axis translation assembly 2 and the X-axis translation assembly 3 adopt high-precision guide pairs and precision ball screw drive mechanisms, ensuring the moving accuracy of the millimeter laser in the horizontal plane. The driving of these assemblies relies on high-performance servo motors, and through a closed-loop control system, precise control of the position of the millimeter laser is achieved. In addition, in order to further improve the processing efficiency, both the Y-axis and the X-axis directions are equipped with a fast-moving function, enabling the millimeter laser to quickly reach the specified position in a short time. The Z-axis lifting assembly 4 is responsible for the movement of the millimeter laser in the vertical direction. This assembly also adopts a high-precision guide pair and a ball screw, ensuring the stable lifting of the millimeter laser in the vertical direction. At the same time, the Z-axis direction is also equipped with a fine-tuning function, enabling the millimeter laser to adjust its height with a micron-level precision, so as to meet the processing requirements for workpieces of different thicknesses. The magnetic field generating device is another major innovation point of this application. This device consists of a number of mounting grooves 17 spacedly opened on the outer side surface of the processing chamber 1 and neodymium iron boron permanent magnets 18 inserted in the mounting grooves. By adjusting the number and arrangement of the permanent magnets, the magnetic field strength and direction can be flexibly controlled.This design not only provides a flexible magnetic field environment for the machining process, but also helps to improve the energy density and penetration power of the laser beam, thereby achieving efficient machining of difficult-to-machine materials.

[0048] In one embodiment, the adjusting member includes a connecting plate 34 connected to one side of the millimeter laser 5. A rotating motor 35 is provided on the back of the connecting plate 34. The output shaft of the rotating motor 35 is provided with a turntable 36 located at the front end of the connecting plate 34. The water jet nozzle 6 is installed at the front end of the turntable 36 through a clamp. The design of the adjusting member fully considers the role of the water jet in the machining process. This mechanism mainly consists of components such as the connecting plate 34, the rotating motor 35, and the turntable 36. The rotating motor 35 drives the turntable 36 to rotate, realizing precise adjustment of the angle of the water jet nozzle 6. This design not only enables the water jet to adjust its jet direction according to different machining requirements, but also helps to improve the machining efficiency and machining quality.

[0049] This application also provides a magnetic field-assisted water jet laser machining method, which specifically includes the following steps:

[0050] S1. System initialization: Start the Y-axis servo drive motor 23, X-axis servo drive motor 28, and Z-axis servo drive motor 33 of the three-dimensional motion mechanism to establish a laser machining coordinate system;

[0051] S2. Workpiece clamping: Place the workpiece 8 to be machined in the machining area of the bearing table 7, and realize double-end clamping and fixation through the fixed pressing plate 9 and the pressing screw;

[0052] S3. Laser positioning: Adjust the focal length of the millimeter laser 5 through the Z-axis lifting component 4, and combine the linkage movement of the X-axis translation component 3 and the Y-axis translation component 2 to accurately position the laser focus on the preset machining position on the surface of the workpiece 8;

[0053] S4. Magnetic field configuration: Select the number and arrangement method of the neodymium iron boron permanent magnets 18 according to the material characteristics, insert the neodymium iron boron permanent magnets 18 into the installation grooves 17 on both sides of the machining chamber 1 to form a symmetric magnetic field, use a gaussmeter to monitor the magnetic field intensity distribution on the surface of the workpiece in real time, and adjust the permanent magnet array to obtain a preset gradient magnetic field of 0.1 - 1.2T;

[0054] S5. Water jet parameter setting: Start the variable frequency water pump 11 of the water circulation treatment system, monitor the pressure of the high-pressure pipeline 12 through the pressure gauge 13, adjust the output water pressure to the range of 10 - 50MPa, and synchronously adjust the jet inclination angle of the water jet nozzle 6 to 15 - 60°;

[0055] S6. Compound machining: Activate the millimeter laser 5 to generate a continuous / pulsed laser beam, synchronously turn on the water jet to form a coaxial protective gas curtain and a slag flushing flow, use the Lorentz force generated by the magnetic field to confine the plasma plume, and perform three-field collaborative machining of laser-water jet-magnetic field along a preset trajectory through a three-dimensional motion mechanism;

[0056] S7. Process monitoring: Collect the temperature field and pressure field data of the machining area in real time, dynamically adjust the parameters of laser power, water jet pressure and magnetic field strength, and maintain a stable machining state.

[0057] The compound machining method is the key to achieving high-efficiency and high-precision machining in this application. This method combines three technologies: laser machining, water jet cutting, and magnetic field assistance. By precisely controlling parameters such as laser power, water jet pressure, and magnetic field strength, precise machining of the workpiece surface is achieved. During the machining process, the laser beam first acts on the workpiece surface to melt or vaporize the material through high temperature; subsequently, the high-pressure water jet flushes the melted or vaporized material to achieve rapid material removal; at the same time, the role of the magnetic field not only increases the energy density and penetration power of the laser beam, but also helps to reduce the heat-affected zone and recast layer generated during the machining process, thereby improving the machining quality and surface finish.

[0058] The above describes the present invention and its implementation manners. Such a description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A laser processing device with the synergistic effect of water jet and magnetic field, characterized in that Comprising: A processing chamber (1), the top of the processing chamber (1) is provided with a processing window, and a workpiece clamping system is arranged inside it. Adjustable magnetic field generating devices are symmetrically arranged on both sides of the processing chamber (1); A three-dimensional motion mechanism, including a Y-axis translation component (2) arranged in parallel on both sides of the processing chamber (1), an X-axis translation component (3) straddling the Y-axis translation component (2), and a Z-axis lifting component (4) installed at the front end of the X-axis translation component (3); A millimeter laser (5), which realizes three-dimensional spatial positioning through the Z-axis lifting component (4), and its optical axis is perpendicular to the workpiece processing surface; A water beam generating device, including a water jet nozzle (6) coaxially arranged with the millimeter laser (5), and a water circulation treatment system connected to the bottom of the processing chamber (1).

2. The water jet - magnetic field assisted laser processing device according to claim 1, characterized in that, The workpiece clamping system includes two relatively arranged bearing platforms (7), both ends of the workpiece (8) are placed on the upper ends of the bearing platforms (7) on both sides, and a fixed pressing plate (9) for pressing the end of the workpiece (8) is installed on the bearing platform (7) through pressing screws.

3. The laser processing device with the synergistic effect of water jet and magnetic field according to claim 1, characterized in that, The water circulation treatment system includes: A water tank (10); A variable frequency water pump (11), its water suction end is communicated with the water tank (10) through a water suction pipe, its water outlet end is connected to the water jet nozzle (6) through a high-pressure pipeline (12), and a pressure gauge (13) is arranged on the high-pressure pipeline (12); A water treatment module, including a drain hole (14) arranged at the bottom of the processing cavity, a filter screen (15) is installed at the drain hole (14) through screws, and a drain pipe (16) communicating with the water tank (10) is arranged at the lower end of the drain hole (14).

4. A laser processing device with the synergistic effect of water jet and magnetic field according to claim 1, characterized in that, The adjustable magnetic field generating device includes a plurality of installation slots (17) spacedly opened on the outer side surface of the processing chamber (1), and neodymium iron boron permanent magnets (18) are inserted into the installation slots (17).

5. A laser processing device with the synergistic action of water jet and magnetic field according to claim 1, characterized in that The Y-axis driving component includes Y-axis bases (19) symmetrically arranged on both sides of the processing chamber (1), longitudinal guide rail pairs (20) are configured on the Y-axis bases (19), a gantry frame (21) that can slide along the Y-axis is assembled on the longitudinal guide rail pairs (20), a Y-axis ball screw transmission mechanism (22) is arranged inside the Y-axis base (19), the Y-axis ball screw transmission mechanism (22) is threadedly connected to the bottom of the gantry frame (21) through a Y-axis ball nut pair, and power is provided by a Y-axis servo drive motor (23) arranged at the end of the Y-axis base (19); An X-axis driving component, including a transverse installation platform (24) fixed to the front end of the cross beam of the gantry frame (21), a horizontal guide rail pair (25) and an X-axis screw transmission mechanism (26) are arranged on the transverse installation platform (24), a transverse slide (27) that can move along the X-axis is assembled on the horizontal guide rail pair (25), the transverse slide (27) is threadedly connected to the X-axis screw transmission mechanism (26) through an X-axis ball nut pair, and is driven by an X-axis servo drive motor (28) arranged at the end of the transverse installation platform (24); The Z-axis driving assembly includes a vertically installed substrate (29) fixed to the front end of the transverse slide (27). A vertical guide pair (30) and a Z-axis lead screw drive mechanism (31) are provided on the vertically installed substrate (29). A vertically moving slide (32) that can move up and down along the Z-axis is assembled on the Z-axis lead screw drive mechanism (31). The millimeter laser (5) is fixed to the vertically moving slide (32). The vertically moving slide (32) is threadedly connected to the vertical lead screw drive mechanism (31) through a Z-axis ball nut pair and is driven by a Z-axis servo drive motor (33) provided at the top of the vertically installed substrate (29).

6. The laser processing device with the synergistic effect of water jet and magnetic field according to claim 1, wherein, The adjusting member includes a connecting plate (34) connected to one side of the millimeter laser (5). A rotary motor (35) is provided on the back of the connecting plate (34). The output shaft of the rotary motor (35) is provided with a turntable (36) located at the front end of the connecting plate (34). The water jet nozzle (6) is installed at the front end of the turntable (36) through a clamp.

7. A laser processing method with the synergistic effect of water jet and magnetic field, characterized in that, Specifically, it includes the following steps: S1. System initialization: Start the Y-axis servo drive motor (23), X-axis servo drive motor (28), and Z-axis servo drive motor (33) of the three-dimensional motion mechanism to establish a laser processing coordinate system; S2. Workpiece clamping: Place the workpiece to be processed (8) in the processing area of the carrier table (7), and achieve double-end clamping and fixation through the fixed pressing plate (9) and the pressing screw; S3. Laser positioning: Adjust the focal length of the millimeter laser (5) through the Z-axis lifting assembly (4), and combine the linkage movement of the X-axis translation assembly (3) and the Y-axis translation assembly (2) to accurately position the laser focus on the preset processing position on the surface of the workpiece (8); S4. Magnetic field configuration: Select the number and arrangement mode of neodymium iron boron permanent magnets (18) according to the material characteristics. Insert the neodymium iron boron permanent magnets (18) into the installation grooves (17) on both sides of the processing chamber (1) to form a symmetric magnetic field. Use a gaussmeter to monitor the magnetic field intensity distribution on the surface of the workpiece in real time, and adjust the permanent magnet array to obtain a preset gradient magnetic field of 0.1 - 1.2T; S5. Water jet parameter setting: Start the variable frequency water pump (11) of the water circulation treatment system, monitor the pressure of the high-pressure pipeline (12) through the pressure gauge (13), adjust the output water pressure to the range of 10 - 50MPa, and synchronously adjust the jet inclination angle of the water jet nozzle (6) to 15 - 60°; S6. Composite processing: Activate the millimeter laser (5) to generate a continuous / pulsed laser beam, synchronously turn on the water jet to form a coaxial protective gas curtain and a slag flushing flow, use the Lorentz force generated by the magnetic field to confine the plasma plume, and perform three-field collaborative processing of laser - water jet - magnetic field according to the preset trajectory through the three-dimensional motion mechanism; S7. Process monitoring: Collect the temperature field and pressure field data of the processing area in real time, dynamically adjust the laser power, water jet pressure, and magnetic field intensity parameters, and maintain a stable processing state.

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