A method and device for laser cutting of heavy parts with the aid of micro- and nano-particle impact strengthening

Abstract

The application relates to the technical field of laser cutting, and discloses a micro-nanoparticle impact strengthening auxiliary heavy piece laser cutting method and device, which comprises the following steps: step one: placing a workpiece to be cut in a specified cutting station; step two: simultaneously outputting micro-nanoparticle gas-solid mixed gas and a laser beam, and the two jointly act on the workpiece to cut; and step three: spraying the micro-nanoparticle gas-solid mixed gas to the surface of the workpiece, and impacting the heat affected zone of the cutting area by the high-energy micro-nanoparticles, so that the molten slag is separated from the surface of the workpiece; the device comprises a control cabinet and a pump source electrically connected to one side of the control cabinet, and a spray head electrically connected to the control cabinet is installed on a cutting platform. The novel spray head is arranged, micro-nanoparticle gas-solid mixed gas and a laser beam are simultaneously outputted, the laser focal point is controlled to act on the surface of the workpiece to be machined during outputting, the surface of the workpiece to be machined is made to generate high temperature and gasify materials, and the molten material after gasification is thrown out.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a method and apparatus for laser cutting heavy components with micro-nano particle impact strengthening assistance. Background Technology

[0002] Laser cutting technology is an advanced processing method based on high-energy laser beams, widely used in the processing of heavy and irregularly shaped metal structural parts. With the increasing demand for high-precision and high-efficiency processing in the manufacturing industry, laser cutting technology, since its development in the 1960s, has gradually combined CNC technology with multi-axis control to achieve efficient processing of complex structures such as irregularly shaped tubes and curved components. Its basic principle is to use a laser (such as a CO2 laser or fiber laser) to generate a high-power-density laser beam, which is focused by an optical system and irradiates the metal surface, causing the material to rapidly heat up to its melting or vaporization temperature. Simultaneously, an auxiliary gas (such as oxygen, nitrogen, or air) is used to blow away the molten material, ultimately forming a kerf. From the working principle of laser cutting, the high-energy laser acts on the material surface during processing, causing it to rapidly melt and partially vaporize, while the auxiliary gas blows the molten material away from the kerf area.

[0003] However, existing methods and apparatus for removing molten material have the following drawbacks:

[0004] High-pressure assisted gas purging is one of the most common methods. High-pressure gas (such as oxygen, nitrogen or air) is used to directly blow away the molten slag during the cutting process. Oxygen can help combustion and improve cutting efficiency, but may cause oxidation. Nitrogen can prevent oxidation, but it is more expensive.

[0005] Mechanical removal methods (such as grinding, polishing, and hammering) are simple to operate but labor-intensive, may damage the workpiece, and are not suitable for parts with complex shapes. They also consume a lot of abrasive. Chemical or electrochemical methods (such as pickling and electropolishing) can effectively remove slag, but they are prone to pollution, may corrode the workpiece if not handled properly, and have high waste liquid treatment costs.

[0006] Laser cleaning technology has the advantages of high efficiency and non-destructive operation, but the equipment is expensive, the operating energy consumption is high, and the effect on some highly reflective metals is limited.

[0007] Ultrasonic cleaning is suitable for precision small parts, but it is not very effective at removing stubborn slag. It usually needs to be used in combination with chemical cleaning, and the equipment cost is relatively high.

[0008] High-pressure water jet cleaning can remove slag, but it consumes a lot of water, requires large equipment size, and may cause microscopic damage to the surface of the workpiece.

[0009] Low-temperature cryogenic stripping utilizes the difference in thermal expansion coefficients of materials to remove slag, but its applicability is limited, effective only for specific materials, and requires expensive refrigeration equipment, which affects production efficiency. Summary of the Invention

[0010] This invention provides a method and apparatus for laser cutting of heavy components with micro-nano particle impact enhancement, which solves the problem mentioned in the background art that there are drawbacks in using high-pressure gas, mechanical removal, chemical or electrical ultrasonic cleaning, high-pressure water jet method and low-temperature freezing peeling, and the lack of efficient, economical and environmentally friendly slag removal methods.

[0011] This invention provides the following technical solution: a laser cutting method for heavy components assisted by micro / nano particle impact strengthening, comprising the following steps:

[0012] Step 1: Place the workpiece to be cut at the designated cutting station;

[0013] Step 2: Simultaneously output micro-nano particle gas-solid mixture and laser beam, both acting together on the workpiece to perform cutting;

[0014] Step 3: The gas-solid mixture of micro-nano particles is injected onto the workpiece surface. The high-kinetic-energy micro-nano particles impact the heat-affected zone of the cutting area, causing the molten slag to detach from the workpiece surface.

[0015] The present invention also discloses a laser cutting device, including a method for laser cutting heavy parts with micro-nano particle impact strengthening assistance. The device includes a control cabinet and a pump source electrically connected to one side of the control cabinet. A cutting platform for placing the workpiece to be cut is provided on one side of the control cabinet, and a nozzle electrically connected to the control cabinet is installed on the cutting platform.

[0016] As an optional solution of the micro-nano particle impact-strengthened auxiliary heavy component laser cutting device of the present invention, wherein: an adjustable support assembly is installed on the cutting platform, the support assembly includes a first support frame and a first support plate, the first support frame is internally threaded with an adjusting screw, the top end of the adjusting screw passes through the first support plate and is rotatably connected to the bottom of the first support plate.

[0017] As an optional solution of the micro-nano particle impact-strengthened auxiliary heavy component laser cutting device of the present invention, wherein: a pump source is provided in the first support plate, an optical part is provided at the bottom of the pump source, and a cooling part is provided between the optical part and the nozzle.

[0018] As an optional embodiment of the micro / nano particle impact-strengthened auxiliary heavy component laser cutting device of the present invention, wherein: a light source controller is provided in the first support frame, and the light source controller is electrically connected to the optical part.

[0019] As an optional solution of the micro-nano particle impact-strengthened auxiliary heavy component laser cutting device of the present invention, wherein: a second support frame is provided on the first support plate, and a gas-solid mixing tank is installed in the second support frame, and the gas-solid mixing tank is connected to a pump source through a high-pressure pump pipe.

[0020] As an optional solution of the micro-nano particle impact-strengthened auxiliary heavy component laser cutting device of the present invention, wherein: a laser channel is provided in the center of the nozzle, and a swirling guide channel is provided at equal intervals around the outer ring of the laser channel, and the swirling guide channel is arranged in a spiral ring.

[0021] As an optional solution of the micro-nano particle impact-strengthened auxiliary heavy component laser cutting device of the present invention, wherein: a collection component is symmetrically arranged on both sides of the cutting platform, the collection component includes a collection frame and a baffle, a torsion part is provided between the baffle and the collection frame, the torsion part includes a rotating shaft rotatably installed in the collection frame, a torsion spring is connected between the rotating shaft and the collection frame, and the baffle is connected to one side of the rotating shaft.

[0022] As an optional solution of the micro-nano particle impact-strengthened auxiliary heavy component laser cutting device of the present invention, wherein: scrapers are symmetrically arranged on the surface of the baffle, the scrapers are slidably connected to one side of the baffle, a second support plate is connected to one side of the baffle, a moving block is connected to one side of the second support plate through a ball head, and the moving block and the collecting frame are slidably connected to the frame of the collecting frame.

[0023] As an optional embodiment of the micro / nano particle impact-strengthened assisted heavy component laser cutting device of the present invention, a driving assembly is provided between the second support plate and the collecting frame. The driving assembly includes a left-hand lead screw and a right-hand lead screw, both of which are rotatably installed in the collecting frame. A motor is provided at one end of the left-hand lead screw, and internal thread sleeves are provided on the surfaces of both the left-hand and right-hand lead screws. A connecting block is connected to the bottom end of the second support plate, and the internal thread sleeve is rotatably connected to the connecting block through a bearing.

[0024] The present invention has the following beneficial effects:

[0025] 1. This invention relates to a method and apparatus for laser cutting of heavy components using micro / nano particle impact enhancement. A control cabinet controls the pump source to excite the working medium, while a gain medium is used to generate stimulated emission, determining the laser wavelength and output characteristics. Combined with relevant components within the optical system, a controller improves the laser transmission efficiency. Photons emitted by stimulated emission within the resonant cavity undergo multiple reflections before finally being output as laser light. A cooling system controls the laser temperature to prevent overheating of the working medium and optical components.

[0026] 2. This method and apparatus for laser cutting heavy-duty parts with impact enhancement of micro-nano particles involves setting up a novel nozzle that simultaneously outputs a gas-solid mixture of nanoparticles and a laser beam. During output, the laser focus is controlled to act on the surface of the workpiece to be processed, generating high temperature and vaporizing the material. The vaporized molten material is then ejected. At the same time, the swirling gas mixture in the nozzle acts on the workpiece surface. The high-pressure rotating gas can cause some of the smaller molten slag to leave the workpiece surface. The micro-nano particles encased in the gas rotate under the action of the swirling nozzle, impacting the molten slag cladding on the workpiece surface. The rotating micro-nano particles exert a swirl-cutting effect on the surface molten slag, making it easier for them to detach from the workpiece surface.

[0027] 3. This method and apparatus for laser cutting heavy-duty parts using micro / nano particle impact enhancement utilizes a coaxial swirling nozzle to rotate micro / nano particles and change their impact direction, creating an angle between them and the workpiece surface. Driven by high-pressure gas, these particles collide with molten slag, generating a tangential force. Mechanical analysis shows that this tangential force effectively promotes slag detachment from the workpiece surface, and its strong mechanical impact force effectively peels off the slag, removing it from the workpiece surface and achieving the effect of removing molten material. Simultaneously, driven by the high-pressure gas, the high-kinetic-energy micro / nano particles impact the heat-affected zone (HAZ) of the cutting area, altering its surface crystal structure. This effectively reduces the area and micro-defects in the HAZ, improving the mechanical properties of the workpiece surface material, such as strength, thus achieving the effect of removing slag while enhancing the workpiece surface performance.

[0028] 4. The method and apparatus for laser cutting heavy parts with impact enhancement of micro-nano particles, wherein a collection frame is set to collect the splashed molten material, wherein a baffle is set inside the collection frame, a rotating shaft is connected to one side of the baffle, and torsion springs are set between the two ends of the rotating shaft and the collection frame, so as to provide buffering force for the baffle by elasticity and prevent the splashed molten material from bouncing back to the surface of the workpiece.

[0029] 5. The method and apparatus for laser cutting heavy parts with impact enhancement of micro-nano particles, by setting a scraper that is movable on one side of a baffle, and driven by a drive component, the scraper can scrape off the slag that may adhere to the surface of the baffle. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0031] Figure 2 This is a side cross-sectional view of the nozzle of the present invention.

[0032] Figure 3 This is a top cross-sectional view of the nozzle of the present invention.

[0033] Figure 4 For the present invention Figure 1Enlarged schematic diagram of the structure at point A in the middle.

[0034] Figure 5 This is a schematic diagram of the three-dimensional structure of the collection frame of the present invention.

[0035] Figure 6 This is a schematic cross-sectional view of the collection frame structure of the present invention.

[0036] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B.

[0037] In the diagram: 1. Control cabinet; 2. Pump source; 3. Optical section; 4. Gas-solid mixing tank; 5. Light source controller; 6. Cooling section; 7. Nozzle; 8. Collection frame; 9. Cutting platform; 10. First support frame; 11. Adjusting screw; 12. First support plate; 13. Second support frame; 14. Laser channel; 15. Swirl guide channel; 16. Baffle; 17. Scraper; 18. Second support plate; 19. Rotating shaft; 20. Torsion spring; 21. Moving block; 22. Ball head; 23. Motor; 24. Left-hand lead screw; 25. Right-hand lead screw; 26. Connecting block; 27. Internal threaded sleeve. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1, please refer to Figures 1 to 7 This invention discloses a laser cutting method for heavy components with impact strengthening aided by micro / nano particles, comprising the following steps:

[0040] Step 1: Place the workpiece to be cut at the designated cutting station;

[0041] Step 2: Simultaneously output micro-nano particle gas-solid mixture and laser beam, both acting together on the workpiece to perform cutting;

[0042] Step 3: The gas-solid mixture of micro-nano particles is injected onto the workpiece surface. The high-kinetic-energy micro-nano particles impact the heat-affected zone of the cutting area, causing the molten slag to detach from the workpiece surface.

[0043] In this embodiment, the pump source is controlled by a control cabinet to excite the working medium and generate laser light. Combined with relevant components within the optical system, the laser transmission efficiency is improved by a controller, thereby enhancing cutting accuracy and efficiency. Addressing the problem of excessive slag adhesion during laser cutting of thick workpieces, a method for laser cutting heavy-duty parts using micro-nano particle impact reinforcement is provided. This method utilizes a simultaneously output micro-nano particle gas-solid mixture to improve slag removal efficiency and optimize processing quality.

[0044] Example 2 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 7 This invention provides a laser cutting device for heavy-duty parts with impact strengthening aided by micro-nano particles, which can be used to achieve the aforementioned laser cutting method for heavy-duty parts with impact strengthening aided by micro-nano particles. The laser cutting device for heavy-duty parts with impact strengthening aided by micro-nano particles includes a control cabinet 1 and a pump source 2 electrically connected to one side of the control cabinet 1. A cutting platform 9 for placing the workpiece to be cut is provided on one side of the control cabinet 1. A nozzle 7 electrically connected to the control cabinet 1 is installed on the cutting platform 9. A laser channel 14 is provided in the center of the nozzle 7. Swirl guide channels 15 are provided in a spiral ring around the outer ring of the laser channel 14. The swirl guide channels 15 are arranged in a spiral ring.

[0045] In this embodiment, the nozzle 7 is configured as a coaxial laser rotary nozzle. The nozzle 7 is divided into two parts: a laser channel 14 and a swirling guide channel 15. The laser channel 14 is configured as a hollow structure for laser transmission. The swirling guide channel 15 is a swirling nozzle that can conduct gas-solid mixtures of micro-nano particles.

[0046] During cutting, control cabinet 1, pump source 2, and external high-pressure gas booster pump are activated. High-pressure auxiliary gas drives micro-nano particles to impact and remove molten slag. During laser cutting, when micro-nano particles impact the attached molten slag, their strong mechanical impact force effectively peels off the slag, causing it to detach from the workpiece surface. Simultaneously, driven by the high-pressure airflow, the micro-nano particles gain extremely high kinetic energy and move at high speed to the workpiece surface, impacting and strengthening the surface area. This effectively reduces the area and micro-defects in the heat-affected zone, improving the performance of the workpiece surface material.

[0047] The control cabinet 1 is equipped with a laser control system, which is used to adjust parameters such as laser output power, pulse mode, and frequency to ensure that the laser operates according to the set requirements and to provide safety protection functions.

[0048] It should be noted that the hollow structure laser channel 14 inside the nozzle 7 is connected to the optical section 3 and is used to guide the laser beam output by the optical section 3.

[0049] The nozzle 7 is configured as a swirling nozzle, which guides the movement of the gas-solid mixture of micro-nano particles through the built-in rotating channel swirling guide channel 15, causing the particles to rotate as they pass through the nozzle 7. The gas is then ejected from the swirling guide channel 15 within the nozzle 7. The high-pressure gas drives the micro-nano particles to generate a vortex flow, changing the direction of their movement. The nozzle 7 simultaneously outputs the gas-solid mixture of micro-nano particles and a laser beam, both of which act together on the workpiece.

[0050] This embodiment uses a novel nozzle to simultaneously output a nanoparticle gas-solid mixture and a laser beam. During output, the laser focus is controlled to act on the surface of the workpiece to be processed, generating high temperatures and vaporizing the material. The vaporized molten material is then ejected. At the same time, the swirling gas mixture in the nozzle acts on the workpiece surface. The high-pressure rotating gas can cause some of the smaller molten slag to leave the workpiece surface. The micro-nano particles encased within the gas undergo self-rotation under the action of the swirling nozzle, impacting the molten slag cladding on the workpiece surface. The self-rotating micro-nano particles exert a shearing effect on the surface molten slag, making it easier for them to detach from the workpiece surface.

[0051] Furthermore, a coaxial swirling nozzle causes the micro-nano particles to rotate and change their impact direction, creating a certain angle between them and the workpiece surface. Driven by high-pressure gas, these particles collide with the molten slag, generating a tangential force. Mechanical analysis shows that this tangential force effectively promotes the molten slag detachment from the workpiece surface. The strong mechanical impact force effectively peels off the molten slag, removing it from the workpiece surface and thus achieving the effect of removing the molten material. Simultaneously, driven by the high-pressure gas, the high-kinetic-energy micro-nano particles impact the heat-affected zone (HAZ) of the cutting area, altering its surface crystal structure. This effectively reduces the area and micro-defects in the HAZ, improving the mechanical properties of the workpiece surface material, such as strength. This achieves the effect of removing molten slag while simultaneously enhancing the workpiece surface performance.

[0052] An adjustable support assembly is installed on the cutting platform 9. The support assembly includes a first support frame 10 and a first support plate 12. An adjusting screw 11 is internally threaded onto the first support frame 10. The top end of the adjusting screw 11 passes through the first support plate 12 and is rotatably connected to the bottom of the first support plate 12. A pump source 2 is provided inside the first support plate 12. An optical part 3 is provided at the bottom of the pump source 2. A cooling part 6 is provided between the optical part 3 and the nozzle 7. A light source controller 5 is provided inside the first support frame 10. The light source controller 5 and the optical part 3 are electrically connected.

[0053] In this embodiment, the workpiece is placed on the cutting platform 9, and a first support frame 10 and a first support plate 12 are provided on the cutting platform 9 to respectively pump the source 2, optical unit 3, light source controller 5, cooling unit 6 and nozzle 7, ensuring the stability of the laser cutting device.

[0054] The height of the nozzle 7 can be adjusted by rotating the adjusting screw 11 to adjust the distance between the first support plate 12 and the cutting platform 9 according to the thickness of the workpiece, thereby expanding the applicable range of the cutting device.

[0055] A second support frame 13 is provided on the first support plate 12. A gas-solid mixing tank 4 is installed inside the second support frame 13. The gas-solid mixing tank 4 is connected to the pump source 2 through a high-pressure pump pipe.

[0056] In this embodiment, the gas-solid mixing tank 4 is a micro-nano particle gas-solid mixing device, which is used to generate a micro-nano particle mixed gas so that the micro-nano particles can be uniformly output through a high-pressure pump pipe. It includes a gas-solid mixing system, a micro-nano particle filtration system, a mixing concentration controller, a pressure controller and other devices, which can realize real-time adjustment of the outlet pressure to ensure that the micro-nano particles have sufficient kinetic energy.

[0057] In this embodiment, an optical section 3 and a light source controller 5 are electrically connected. The light source controller 5 can control related components within the optical section 3, including lenses, beam expanders, collimators, etc., for focusing, shaping, and adjusting the laser beam so that its focal point acts on the workpiece, thereby improving the laser transmission efficiency. The optical section 3 contains a resonant cavity composed of a pair of mirrors (a complete reflector and a partial reflector) to enhance light oscillation and selectively amplify light of specific wavelengths, causing stimulated emission photons to be reflected multiple times within the cavity and ultimately output as laser light.

[0058] It should be noted that the optical part 3 includes a fiber laser, a laser lens, a focusing lens, and a reflector. This part of the structure is well known to those skilled in the art and will not be described in detail.

[0059] A cooling section 6 is provided to control the temperature of the laser and prevent the working medium and optical components from overheating. It contains a circulating water cooling system that effectively removes the heat generated by the laser.

[0060] The cooling section 6 includes a cooling water tank, a cooling pump, cooling pipes, a radiator (or heat exchanger), a temperature sensor, a filter, and a control system. This structure is well-known to those skilled in the art and will not be described in detail.

[0061] Example 3 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 7 The cutting platform 9 is symmetrically provided with collection components on both sides. The collection components include a collection frame 8 and a baffle 16. A torque part is provided between the baffle 16 and the collection frame 8. The torque part includes a rotating shaft 19 rotatably installed in the collection frame 8. A torsion spring 20 is connected between the rotating shaft 19 and the collection frame 8. The baffle 16 is connected to one side of the rotating shaft 19.

[0062] In this embodiment, the purpose is to collect molten slag that has detached from the surface of the workpiece. The molten slag splashes onto the baffle 16 and then slides down from the baffle 16 into the collection frame 8 for collection. To prevent the molten slag from splashing onto the surface of the baffle 16 and bouncing back onto the workpiece, the baffle 16 is configured as an elastic rotating device. A rotating shaft 19 is connected to one side of the baffle 16, and both ends of the rotating shaft 19 are rotatably connected to the collection frame 8. A torsion spring 20 is connected between the rotating shaft 19 and the collection frame 8. When the molten slag splashes and hits the baffle 16, the torsion spring 20 provides a buffer for the impact force on the baffle 16, which can effectively prevent the molten slag from bouncing back onto the workpiece after splashing.

[0063] In this embodiment, a collection frame is set up to collect the splashed molten material. The collection frame is equipped with a baffle, and a rotating shaft is connected to one side of the baffle. Torsion springs are set between the two ends of the rotating shaft and the collection frame. The elasticity provides a buffering force for the baffle and prevents the splashed molten material from bouncing back onto the workpiece surface.

[0064] Example 4 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 7 A scraper 17 is symmetrically arranged on the surface of the baffle 16. The scraper 17 is slidably connected to one side of the baffle 16. A second support plate 18 is connected to one side of the baffle 16. A moving block 21 is connected to one side of the second support plate 18 through a ball head 22. The moving block 21 and the collection frame 8 are slidably connected to the frame of the collection frame 8. A drive assembly is provided between the second support plate 18 and the collection frame 8. The drive assembly includes a left-hand lead screw 24 and a right-hand lead screw 25. Both the left-hand lead screw 24 and the right-hand lead screw 25 are rotatably installed in the collection frame 8. A motor 23 is provided at one end of the left-hand lead screw 24. Both the left-hand lead screw 24 and the right-hand lead screw 25 are provided with internal threaded sleeves 27. A connecting block 26 is connected to the bottom end of the second support plate 18. The internal threaded sleeves 27 are rotatably connected to the connecting block 26 through bearings.

[0065] In this embodiment, to prevent insufficiently cooled slag from splashing onto the surface of the baffle 16 and sticking to the baffle 16 instead of falling into the collection frame 8, two sets of scrapers 17 are symmetrically arranged on the surface of the baffle 16 to scrape off the slag and make it fall into the collection frame 8.

[0066] When cleaning the baffle 16, the motor 23 is started, which drives the left-hand lead screw 24 and the right-hand lead screw 25 to rotate. The internal threaded sleeve 27 rotates within the connecting block 26. The connecting block 26 is connected to the second support plate 18. The second support plate 18 drives the scraper 17 to move on the surface of the baffle 16. Since the left-hand lead screw 24 and the right-hand lead screw 25 rotate in different directions, they can be driven to move back and forth on both sides of the baffle 16 at the same time, which improves the efficiency of scraping slag and further increases the slag collection speed.

[0067] It should be noted that by connecting the ball head 22 and the moving block 21, not only can the second support plate 18 move on the collection frame 8, but also when the baffle 16 is twisted, there will be no interference between the moving block 21 and the baffle 16.

[0068] In this embodiment, a scraper is installed on one side of the baffle and driven by a drive component to scrape off any molten slag that may adhere to the surface of the baffle.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for laser cutting of heavy parts assisted by micro- and nano- particle impact strengthening, characterized in that: The method comprises the following steps: Step 1: placing the workpiece to be cut in the designated cutting station; Step 2: simultaneously outputting the micro-nano particle gas-solid mixed gas and the laser beam, and the two work together on the workpiece for cutting; Step 3: the micro-nano particle gas-solid mixed gas is sprayed to the surface of the workpiece, and the high-energy micro-nano particles impact the heat-affected zone of the cutting area, so that the slag is separated from the surface of the workpiece; A kind of micro-nano particle impact strengthening auxiliary heavy piece laser cutting method is realized based on a kind of micro-nano particle impact strengthening auxiliary heavy piece laser cutting device, the device includes control cabinet (1) and the pump source (2) electrically connected to one side of control cabinet (1), one side of the control cabinet (1) is provided with a cutting platform (9) for placing the workpiece to be cut, the cutting platform (9) is installed with and the spray head (7) electrically connected to the control cabinet (1); The cutting platform (9) is installed with an adjustable support assembly, the support assembly includes a first support frame (10) and a first support plate (12), the first support frame (10) is threadedly connected with an adjusting screw (11), and the top end of the adjusting screw (11) penetrates through the first support plate (12) and is rotationally connected to the bottom of the first support plate (12); The first support plate (12) is provided with a pump source (2), and the bottom of the pump source (2) is provided with an optical part (3), and the optical part (3) and the spray head (7) are provided with a cooling part (6) therebetween.

2. The method according to claim 1, wherein the method is characterized by: The first support frame (10) is provided with a light source controller (5), and the light source controller (5) and the optical part (3) are electrically connected.

3. The method according to claim 1, wherein the method is characterized by: The first support plate (12) is provided with a second support frame (13), the second support frame (13) is provided with a gas-solid mixing tank (4), and the gas-solid mixing tank (4) is communicated with the pump source (2) through a high-pressure pump pipe.

4. The method according to claim 1, wherein the method is characterized by: The spray head (7) is provided with a laser channel (14) in the central position, and a spiral flow guide channel (15) is provided at equal intervals on the outer ring of the laser channel (14), and the spiral flow guide channel (15) is arranged in a spiral shape.

5. The method of claim 1, wherein the method further comprises: The cutting platform (9) is provided with a collecting assembly on both sides, the collecting assembly includes a collecting frame (8) and a baffle (16), a torsion part is arranged between the baffle (16) and the collecting frame (8), the torsion part includes a rotating shaft (19) rotatably installed in the collecting frame (8), a torsion spring (20) is connected between the rotating shaft (19) and the collecting frame (8), and the baffle (16) is connected to one side of the rotating shaft (19).

6. The method according to claim 5, wherein the method is a method for laser cutting of heavy workpieces with the aid of micro- or nano-particle impact strengthening. The surface of the baffle (16) is provided with a scraper (17) symmetrically, the scraper (17) is slidably connected to one side of the baffle (16), the baffle (16) is connected to a second support plate (18) on one side, the second support plate (18) is connected to a moving block (21) through a ball head (22) on one side, and the moving block (21) and the collecting frame (8) are slidably connected to the frame of the collecting frame (8).

7. The method according to claim 6, wherein the method is a method for laser cutting of heavy workpieces with the aid of micro- or nano-particle impact strengthening. The second support plate (18) and the collecting frame (8) are provided with a driving assembly, the driving assembly comprises a left-hand screw rod (24) and a right-hand screw rod (25), the left-hand screw rod (24) and the right-hand screw rod (25) are both rotationally installed in the collecting frame (8), one end of the left-hand screw rod (24) is provided with a motor (23), the surfaces of the left-hand screw rod (24) and the right-hand screw rod (25) are both provided with an internal thread sleeve (27), the bottom end of the second support plate (18) is connected with a connecting block (26), and the internal thread sleeve (27) is rotationally connected in the connecting block (26) through a bearing.

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