Laser cutting method and device for micro-nano particle impact strengthening auxiliary heavy part

Abstract

The invention relates to the technical field of laser cutting, and discloses a micro-nano particle impact strengthening auxiliary heavy part laser cutting method and device, and the method comprises the following steps: step 1, placing a to-be-cut workpiece at a designated cutting station; secondly, micro-nano particle gas-solid mixed gas and a laser beam are output at the same time and jointly act on the workpiece for cutting; thirdly, micro-nano particle gas-solid mixed gas is sprayed to the surface of the workpiece, high-kinetic-energy micro-nano particles impact a heat affected zone of the cutting area, and slag is made to be separated from the surface of the workpiece; the device comprises a control cabinet and a pumping source electrically connected to one side of the control cabinet, and a spray head electrically connected with the control cabinet is installed on the cutting platform. By arranging the novel spray head, micro-nano particle gas-solid mixed gas and laser beams are output at the same time, the laser focus is controlled to act on the surface, needing to be machined, of a workpiece during output, the high temperature is generated, materials are gasified, and gasified melt is thrown out.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and particularly to a method and device for laser cutting of heavy parts assisted by micro-nano particle impact strengthening. Background Art

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

[0003] However, the methods and devices for removing molten materials in the prior art have the following defects: High-pressure auxiliary gas blowing is one of the most commonly used methods. High-pressure gas (such as oxygen, nitrogen or air) is used to directly blow away the molten slag during cutting. Oxygen can assist combustion to improve the cutting efficiency, but it may cause oxidation. Nitrogen can prevent oxidation but has a high cost; Mechanical removal methods (such as grinding, polishing and knocking) are simple to operate but have a high labor intensity, may damage the workpiece, are not suitable for parts with complex shapes, and consume a large amount of abrasives at the same time. Chemical or electrochemical methods (such as pickling and electrolytic polishing) can effectively clean the molten slag, but are prone to pollution, may corrode the workpiece if not handled properly, and have a high cost for waste liquid treatment; Laser cleaning technology has the advantages of high efficiency and non-damage, but the equipment cost is expensive, the operation energy consumption is large, and the effect on some highly reflective metals is limited; Ultrasonic cleaning is suitable for precision small parts, but the cleaning effect on stubborn molten slag is poor, usually needs to be combined with chemical cleaning, and the equipment cost is high; High-pressure water jet cleaning can remove the molten slag, but has a large water consumption, a large equipment volume, and may cause microscopic damage to the workpiece surface; Cryogenic freezing peeling uses the difference in thermal expansion coefficients of materials to remove the molten slag, but the applicable range is limited, is only effective for specific materials, and requires expensive refrigeration equipment, affecting production efficiency. Summary of the Invention

[0004] The present invention provides a method and device for laser cutting of heavy parts assisted by micro-nano particle impact strengthening, which solves the problems in the above-mentioned background technology that there are drawbacks in using high-pressure gas, mechanical removal method, chemical or electro-chemical ultrasonic cleaning, high-pressure water jet method, and cryogenic freezing peeling, etc., and there is a lack of efficient, economical and environmentally friendly slag removal means.

[0005] The present invention provides the following technical solutions: A method for laser cutting of heavy parts assisted by micro-nano particle impact strengthening, comprising the following steps: Step 1: Place the workpiece to be cut at the designated cutting station; Step 2: Output the micro-nano particle gas-solid mixed gas and the laser beam simultaneously, and the two act together on the workpiece for cutting; Step 3: The micro-nano particle gas-solid mixed gas is sprayed onto the surface of the workpiece, and the high-kinetic-energy micro-nano particles impact the heat-affected zone of the cutting area, causing the slag to break away from the surface of the workpiece.

[0006] The present invention also discloses a laser cutting device, including a method for laser cutting of heavy parts assisted by micro-nano particle impact strengthening. 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.

[0007] As an alternative scheme of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to 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. An adjustment screw is threadedly connected inside the first support frame, and the top end of the adjustment screw passes through the first support plate and is rotatably connected to the bottom of the first support plate.

[0008] As an alternative scheme of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to the present invention, wherein: A pump source is provided inside 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.

[0009] As an alternative scheme of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to the present invention, wherein: A light source controller is provided inside the first support frame, and the light source controller is electrically connected to the optical part.

[0010] As an alternative scheme of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to the present invention, wherein: A second support frame is provided on the first support plate, and a gas-solid mixing tank is installed inside the second support frame. The gas-solid mixing tank is communicated with the pump source through a high-pressure pump pipe.

[0011] As an alternative solution of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to the present invention, wherein: a laser channel is provided at the central position inside the nozzle, and swirling guide channels are annularly and equidistantly arranged outside the laser channel, and the swirling guide channels are arranged in a spiral annular pattern.

[0012] As an alternative solution of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to the present invention, wherein: collecting components are symmetrically arranged on both sides of the cutting platform, the collecting components include a collecting frame and a baffle, a torsion part is arranged between the baffle and the collecting frame, the torsion part includes a rotating shaft rotatably installed in the collecting frame, a torsion spring is connected between the rotating shaft and the collecting frame, and the baffle is connected to one side of the rotating shaft.

[0013] As an alternative solution of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to the present invention, wherein: scraping plates are symmetrically arranged on the surface of the baffle, the scraping plates 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.

[0014] As an alternative solution of the laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to the present invention, wherein: a driving component is arranged between the second support plate and the collecting frame, the driving component includes a left-handed screw rod and a right-handed screw rod, both the left-handed screw rod and the right-handed screw rod are rotatably installed in the collecting frame, a motor is arranged at one end of the left-handed screw rod, internal thread sleeves are arranged on the surfaces of the left-handed screw rod and the right-handed screw rod, 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.

[0015] The present invention has the following beneficial effects: 1. For the laser cutting method and device for heavy parts assisted by micro-nano particle impact strengthening, the pump source is controlled by the control cabinet to excite the working medium, and at the same time, the gain medium, the medium that generates stimulated radiation, determines the wavelength and output characteristics of the laser. Combining the relevant components in the optical system, the transmission efficiency of the laser is improved through the controller. The photons of stimulated radiation in the resonant cavity are reflected multiple times in the cavity and finally output the laser. The cooling system is used to control the temperature of the laser to prevent the working medium and optical components from overheating.

[0016] 2. This method and device for laser cutting heavy parts assisted by micro-nano particle impact strengthening is designed to simultaneously output nano-particle gas-solid mixed gas and laser beam by setting a new nozzle. During output, the laser focus is controlled to act on the surface of the workpiece to be processed, so that it generates high temperature and vaporizes the material, and the vaporized melt is thrown out; at this time, the swirling mixed gas in the nozzle acts on the workpiece surface at the same time, and the high-pressure rotating gas can make some smaller slag leave the workpiece surface. The micro-nano particles entrained therein produce self-rotation under the action of the swirling nozzle, impacting the slag melted on the workpiece surface, and the self-rotating micro-nano particles produce a rotary cutting effect on the surface slag, making it easier to separate from the workpiece surface.

[0017] 3. This method and device for laser cutting heavy parts assisted by micro-nano particle impact strengthening uses a coaxial swirl nozzle to rotate the micro-nano particles and change the impact direction, so that they form a certain angle with the workpiece surface. Driven by high-pressure gas, they collide with the slag to generate a tangential force. According to mechanical analysis, the tangential force can better promote the slag to separate from the workpiece surface. Its strong mechanical impact can effectively peel off the slag and separate it from the workpiece surface, thereby achieving the effect of removing the molten coating. At the same time, driven by high-pressure gas, the high-kinetic energy micro-nano particles impact the heat-affected zone of the cutting area, causing the surface crystal structure to change, effectively reducing the regional and microscopic defects in the heat-affected zone, and improving the mechanical properties such as the strength of the workpiece surface material, thereby achieving the effect of removing the slag while enhancing the surface performance of the workpiece.

[0018] 4. This method and device for laser cutting heavy parts assisted by micro-nano particle impact strengthening collects the splashed molten material by setting a collection frame, wherein a baffle is provided in the collection frame, a rotating shaft is connected to one side of the baffle, and a torsion spring is provided between the two ends of the rotating shaft and the collection frame. The elasticity is used to provide a buffering force for the baffle to prevent the splashed molten material from rebounding to the surface of the workpiece.

[0019] 5. This method and device for laser cutting heavy parts assisted by micro-nano particle impact strengthening is implemented by setting a scraper that is movably arranged on one side of the baffle and is driven by a driving component so that the scraper can scrape off the splashing slag that may adhere to the surface of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a schematic side sectional structural diagram of the nozzle of the present invention.

[0022] Figure 3 It is a schematic diagram of the top cross-sectional structure of the nozzle of the present invention.

[0023] Figure 4 For the present invention Figure 1Schematic enlarged view of the structure at position A in [the figure].

[0024] Figure 5 Schematic three-dimensional structure diagram of the collection box of the present invention.

[0025] Figure 6 Schematic cross-sectional structure diagram of the collection box of the present invention.

[0026] Figure 7 For the present invention Figure 6 Schematic enlarged view of the structure at position B in [the figure].

[0027] In the figure: 1, control cabinet; 2, pump source; 3, optical part; 4, gas-solid mixing tank; 5, light source controller; 6, cooling part; 7, nozzle; 8, collection box; 9, cutting platform; 10, first support frame; 11, adjusting screw; 12, first support plate; 13, second support frame; 14, laser channel; 15, swirl guiding 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-handed lead screw; 25, right-handed lead screw; 26, connecting block; 27, internal thread sleeve. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In Embodiment 1, please refer to Figures 1 to 7 , the present invention discloses a method for laser cutting of heavy parts assisted by micro-nano particle impact strengthening, including the following steps: Step 1: Place the workpiece to be cut at the designated cutting station; Step 2: Output the micro-nano particle gas-solid mixed gas and the laser beam simultaneously, and the two act together on the workpiece for cutting; Step 3: The micro-nano particle gas-solid mixed gas is sprayed onto the surface of the workpiece, and the high-kinetic-energy micro-nano particles impact the heat-affected zone of the cutting area, causing the molten slag to detach from the surface of the workpiece.

[0030] In this embodiment, the pump source is controlled by the control cabinet to excite the working medium to generate laser; in combination with the relevant components in the optical system, the transmission efficiency of the laser is improved through the controller to improve the cutting accuracy and efficiency. Aiming at the problem of a large amount of molten slag adhering during the laser cutting of thick workpieces, a method for laser cutting of heavy parts assisted by micro-nano particle impact strengthening is provided, and the micro-nano particle gas-solid mixed gas output simultaneously is used to improve the molten slag removal efficiency and optimize the processing quality.

[0031] Example 2: This example is an explanation based on Example 1. For details, please refer to Figures 1 to 7 The present invention provides a micro-nano particle impact strengthening assisted heavy-duty parts laser cutting device, which can be used to realize the above-mentioned micro-nano particle impact strengthening assisted heavy-duty parts laser cutting method. The micro-nano particle impact strengthening assisted heavy-duty parts laser cutting device 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 a 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 equidistantly provided in an annular shape around the outer ring of the laser channel 14. The swirl guide channels 15 are arranged in a spiral annular shape.

[0032] In this embodiment, the nozzle 7 is set as a coaxial laser swirl nozzle. The nozzle 7 is divided into two structures, including a laser channel 14 and a swirl guide channel 15. The laser channel 14 is set as a hollow structure for laser transmission; the swirl guide channel 15 is a swirl nozzle, which can conduct micro-nano particle gas-solid mixed gas.

[0033] During cutting, control cabinet 1, pump source 2, and an external high-pressure gas booster pump are activated, using high-pressure auxiliary gas to drive micro-nano particles to impact and remove slag. During the laser cutting process, when the micro-nano particles impact the attached slag, the intense mechanical impact effectively peels the slag off 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, impact-strengthening the surface area, effectively reducing the regional and microscopic defects in the heat-affected zone and improving the performance of the workpiece surface material.

[0034] The control cabinet 1 is equipped with a laser control system for adjusting the laser's output power, pulse mode, frequency and other parameters to ensure that the laser operates according to the set requirements and provide safety protection functions.

[0035] It should be noted that the hollow laser channel 14 provided in the nozzle 7 is connected to the optical part 3 and is used to guide the laser beam output by the optical part 3 .

[0036] The nozzle 7 is configured as a swirl nozzle. It guides the movement of the micro-nano particle gas-solid mixture through a built-in swirl guide channel 15, causing it to self-rotate as it passes through the nozzle 7. The high-pressure gas is ejected from the swirl guide channel 15 within the nozzle 7, driving the micro-nano particles to generate a vortex flow, changing the direction of their movement. The nozzle 7 simultaneously outputs the micro-nano particle gas-solid mixture and the laser beam, which act together on the workpiece.

[0037] This embodiment sets up a new type of nozzle to simultaneously output nano-particle gas-solid mixed gas and laser beam. During output, the laser focus is controlled to act on the surface of the workpiece to be processed, so that it generates high temperature and vaporizes the material, and the vaporized melt is thrown out; at this time, the swirling mixed gas in the nozzle acts on the surface of the workpiece at the same time, and the high-pressure rotating gas can make some smaller slag leave the surface of the workpiece. The micro-nanoparticles entrained therein produce self-rotation under the action of the swirling nozzle, impacting the slag melted on the surface of the workpiece, and the self-rotating micro-nanoparticles produce a rotary cutting effect on the surface slag, making it easier to separate from the workpiece surface.

[0038] Furthermore, the coaxial swirl nozzle is used to rotate the micro-nano particles and change their impact direction, creating a certain angle with the workpiece surface. Driven by high-pressure gas, they collide with the slag to generate a tangential force. According to mechanical analysis, the tangential force can better promote the slag to separate from the workpiece surface. Its strong mechanical impact can effectively peel the slag and separate it from the workpiece surface, thereby achieving the effect of removing the molten coating. At the same time, driven by high-pressure gas, the high-kinetic energy of the micro-nano particles impacts the heat-affected zone of the cutting area, causing changes in the surface crystal structure, effectively reducing the regional and microscopic defects in the heat-affected zone, and improving the mechanical properties such as the strength of the workpiece surface material, achieving the effect of removing slag while enhancing the surface performance of the workpiece.

[0039] An adjustable support assembly is installed on the cutting platform 9, and the support assembly includes a first support frame 10 and a first support plate 12. The first support frame 10 is internally threaded with an adjusting screw 11, the top 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 in 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 in the first support frame 10, and the light source controller 5 and the optical part 3 are electrically connected.

[0040] 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, which respectively perform the pump source 2, optical part 3, light source controller 5, cooling part 6 and nozzle 7 to ensure the stability of the laser cutting device.

[0041] According to the thickness of the workpiece, the distance between the first support plate 12 and the cutting platform 9 is adjusted by rotating the adjusting screw 11, thereby adjusting the height of the nozzle 7, thereby expanding the applicable range of the cutting device.

[0042] A second support frame 13 is provided on the first support plate 12 , and a gas-solid mixing tank 4 is installed in the second support frame 13 . The gas-solid mixing tank 4 is connected to the pump source 2 through a high-pressure pump pipe.

[0043] 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 the real-time adjustment of the outlet pressure and ensure that the micro-nano particles have sufficient kinetic energy.

[0044] In this embodiment, an optically connected optical unit 3 and a light source controller 5 are provided. Through the light source controller 5, relevant components in the optical unit 3 can be controlled, including lenses, beam expanders, collimators, etc., which are used to focus, shape and adjust the laser beam so that its focus acts on the workpiece and improve the transmission efficiency of the laser. Among them, a resonant cavity is arranged in the optical unit 3, which is composed of a pair of mirrors (a total reflector and a partial reflector), and is used to enhance the oscillation of light and selectively amplify light of a specific wavelength, so that the photons of stimulated radiation are reflected multiple times in the cavity and finally output laser light.

[0045] It should be noted that the optical unit 3 includes a fiber laser, a laser lens, a focusing lens and a mirror. This part of the structure is well-known technology to those skilled in the art and will not be elaborated.

[0046] A cooling unit 6 is provided to control the temperature of the laser and prevent the working medium and optical components from overheating. A circulating water cooling device is arranged therein, which can effectively take away the heat generated by the laser.

[0047] The cooling unit 6 includes a cooling water tank, a cooling pump, a cooling pipeline, a radiator (or heat exchanger), a temperature sensor, a filter and a control system. This part of the structure is well-known technology to those skilled in the art and will not be elaborated.

[0048] Embodiment 3. This embodiment is an explanatory description based on Embodiment 1. Specifically, please refer to Figures 1 to 7 , collection components are symmetrically arranged on both sides of the cutting platform 9. The collection components include a collection frame 8 and a baffle 16. A torsion part is arranged between the baffle 16 and the collection frame 8. The torsion 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.

[0049] In this embodiment, it is intended to collect the slag separated from the surface of the workpiece. The slag splashes onto the baffle 16 and then slides from the baffle 16 into the collection frame 8 for collection. In order to prevent the slag from splashing onto the surface of the baffle 16 and rebounding onto the workpiece, the baffle 16 is set as an elastic rotating device. One side of the baffle 16 is connected to a rotating shaft 19. Both ends of the rotating shaft 19 are rotatably connected to the collection frame 8, and a torsion spring 20 is connected between the rotating shaft 19 and the collection frame 8. When the slag splashes and impacts the baffle 16, the torsion spring 20 is used to provide a buffer for the impact force received by the baffle 16, which can effectively prevent the slag from rebounding onto the workpiece after splashing.

[0050] In this embodiment, a collection box is provided to collect the splashed molten material. Among them, a baffle is arranged inside the collection box. One side of the baffle is connected with a rotating shaft, and torsion springs are arranged between both ends of the rotating shaft and the collection box, using elasticity to provide a buffering force for the baffle to prevent the splashed molten material from rebounding to the surface of the workpiece.

[0051] Embodiment 4. This embodiment is an explanatory description based on Embodiment 1. Specifically, please refer to Figures 1 to 7 , scraping plates 17 are symmetrically arranged on the surface of the baffle 16. The scraping plates 17 are slidably connected to one side of the baffle 16. One side of the baffle 16 is connected with a second support plate 18. One side of the second support plate 18 is connected with a moving block 21 through a ball head 22. The moving block 21 and the collection box 8 are slidably connected to the frame of the collection box 8. A driving component is arranged between the second support plate 18 and the collection box 8. The driving component includes a left-handed lead screw 24 and a right-handed lead screw 25. Both the left-handed lead screw 24 and the right-handed lead screw 25 are rotatably installed inside the collection box 8. One end of the left-handed lead screw 24 is provided with a motor 23. Threaded sleeves 27 are arranged on the surfaces of both the left-handed lead screw 24 and the right-handed lead screw 25. The bottom end of the second support plate 18 is connected with a connecting block 26. The threaded sleeve 27 is rotatably connected inside the connecting block 26 through a bearing.

[0052] In this embodiment, to prevent the slag with insufficient cooling from splashing onto the surface of the baffle 16 but adhering to the baffle 16 and not falling into the collection box 8, therefore, two groups of scraping plates 17 are symmetrically arranged on the surface of the baffle 16 to scrape the above-mentioned slag so that it falls into the collection box 8.

[0053] When cleaning the baffle 16, start the motor 23 to drive the rotation of the left-handed lead screw 24 and the right-handed lead screw 25. Utilize the rotation of the threaded sleeve 27 inside the connecting block 26. The connecting block 26 is connected with the second support plate 18. The second support plate 18 drives the scraping plate 17 to move on the surface of the baffle 16. Since the rotation directions of the left-handed lead screw 24 and the right-handed lead screw 25 are different, the left-handed lead screw 24 and the right-handed lead screw 25 can be simultaneously driven to reciprocate on both sides of the baffle 16, improving the efficiency of scraping the slag and further increasing the collection speed of the slag.

[0054] It should be noted that the connection between the ball head 22 and the moving block 21 can not only enable the second support plate 18 to move on the collection box 8, but also prevent interference between the moving block 21 and the baffle 16 when the baffle 16 generates torsion.

[0055] In this embodiment, by arranging scraping plates movably arranged on one side of the baffle and driven by a driving component, the scraping plates scrape the splashed molten slag that may adhere to the surface of the baffle.

[0056] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0057] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for laser cutting of heavy parts assisted by micro-nano particle impact strengthening, characterized in that: The steps are as follows: Step 1: Place the workpiece to be cut on the designated cutting station; Step 2: Output the micro-nano particle gas-solid mixed gas and the laser beam simultaneously, and the two act together on the workpiece for cutting; Step 3: The micro-nano particle gas-solid mixed gas is sprayed onto the surface of the workpiece, and the high-kinetic-energy micro-nano particles impact the heat-affected zone of the cutting area, causing the slag to break away from the surface of the workpiece.

2. A laser cutting device for heavy parts assisted by micro-nano particle impact strengthening, comprising the method for laser cutting heavy parts assisted by micro-nano particle impact strengthening according to claim 1, characterized in that, It 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 arranged on one side of the control cabinet (1), and a nozzle (7) electrically connected to the control cabinet (1) is installed on the cutting platform (9).

3. The laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 2, wherein: 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 rod (11) is threadedly connected inside the first support frame (10), and the top end of the adjusting screw rod (11) penetrates through the first support plate (12) and is rotatably connected to the bottom of the first support plate (12).

4. The laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 3, wherein: A pump source (2) is arranged inside the first support plate (12). An optical part (3) is arranged at the bottom of the pump source (2), and a cooling part (6) is arranged between the optical part (3) and the nozzle (7).

5. A laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 4, characterized in that: A light source controller (5) is arranged inside the first support frame (10), and the light source controller (5) is electrically connected to the optical part (3).

6. A laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 4, characterized in that: A second support frame (13) is arranged on the first support plate (12), and a gas-solid mixing tank (4) is installed inside the second support frame (13). The gas-solid mixing tank (4) is communicated with the pump source (2) through a high-pressure pump pipe.

7. A laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 2, characterized in that: A laser channel (14) is arranged at the central position inside the nozzle (7). A swirl guiding channel (15) is annularly and equidistantly arranged on the outer ring of the laser channel (14), and the swirl guiding channel (15) is arranged in a spiral annular arrangement.

8. A laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 6, characterized in that: Collection components are symmetrically arranged on both sides of the cutting platform (9). The collection components include a collection frame (8) and a baffle (16). A torsion part is arranged between the baffle (16) and the collection frame (8). The torsion part includes a rotating shaft (19) rotatably installed inside the collection frame (8), a torsion spring (20) is connected between the rotating shaft (19) and the collection frame (8), and the baffle (16) is connected to one side of the rotating shaft (19).

9. A laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 8, characterized in that: Scrapers (17) are symmetrically arranged on the surface of the baffle (16). The scrapers (17) are 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), and the moving block (21) and the collection frame (8) are slidably connected to the frame of the collection frame (8).

10. A laser cutting device for heavy parts assisted by micro-nano particle impact strengthening according to claim 9, characterized in that: A driving assembly is provided between the second support plate (18) and the collection box (8). The driving assembly includes a left-handed lead screw (24) and a right-handed lead screw (25). The left-handed lead screw (24) and the right-handed lead screw (25) are both rotatably installed in the collection box (8). One end of the left-handed lead screw (24) is provided with a motor (23). Threaded sleeves (27) are provided on the surfaces of the left-handed lead screw (24) and the right-handed lead screw (25). The bottom end of the second support plate (18) is connected with a connecting block (26). The threaded sleeve (27) is rotatably connected to the connecting block (26) through a bearing.

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