Laser cutting nozzle and laser cutting apparatus
By introducing independent combustion-supporting gas and modified gas flow channels into the laser cutting nozzle, and combining them with cooling channels, the problems of insufficient airflow and material adaptability of traditional nozzles when cutting thick plates are solved, resulting in more efficient cutting quality and longer nozzle life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MAXPHOTONICS CORP
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional laser cutting nozzles struggle to provide sufficient airflow strength and stability when cutting thick plates, failing to effectively remove molten slag, resulting in rough cut surfaces. Furthermore, they are unsuitable for cutting different materials, are prone to damage, have short lifespans, and incur high maintenance costs.
A nozzle structure was designed that includes a first flow channel for combustion-supporting gas and a corrective gas flow channel. The two channels independently control the gas flow rate and pressure. The corrective gas confines the combustion-supporting gas, enhancing the flexibility and stability of airflow control. A cooling flow channel is set up to reduce the nozzle temperature and extend its service life.
It improves cutting quality and production efficiency, broadens the application range of laser cutting equipment, reduces slag accumulation and equipment maintenance costs, and extends nozzle life.
Smart Images
Figure CN224322546U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laser processing technology, and in particular to a laser cutting nozzle and laser cutting equipment. Background Technology
[0002] When laser cutting steel, gas and a focused laser beam are directed through a nozzle to the material being cut, forming an airflow stream. The basic requirements for this airflow are a large flow rate and high velocity entering the cut, ensuring sufficient oxidation for the material to undergo a full exothermic reaction, while also having enough power to eject the molten material. Therefore, nozzle design and airflow control are crucial factors.
[0003] Traditional single-channel nozzles present numerous problems in practical applications. For example, when cutting thicker plates, the nozzle struggles to provide sufficient airflow strength and stability, failing to effectively remove molten slag. This results in slag adhering to the cut surface, affecting its smoothness and finish, and reducing cutting quality. Furthermore, due to their simple design, traditional nozzles cannot flexibly adjust airflow parameters to adapt to diverse cutting needs for workpieces of different materials, limiting the applicability of laser cutting equipment. While some existing nozzles incorporate internal and external air channels, these use the same air source and pressure, failing to effectively protect the cut surface. This easily leads to a rough cut surface, and if the cut is incomplete, molten slag will splatter and adhere to the bottom, forming slag and affecting cutting quality. Additionally, traditional nozzles are susceptible to damage from high temperatures and molten slag impacts during prolonged use, shortening their lifespan and increasing equipment maintenance costs.
[0004] Therefore, there is an urgent need for a laser cutting nozzle and laser cutting equipment to solve the above problems. Utility Model Content
[0005] Based on the above, the purpose of this utility model is to provide a laser cutting nozzle and laser cutting equipment, which has more flexible airflow control, can more effectively remove the molten slag generated during cutting, has better cutting quality, and has a longer service life, reducing equipment maintenance costs.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] Laser cutting nozzles include:
[0008] A nozzle is connected to the nozzle holder. A first flow channel for combustion-supporting gas is provided inside the nozzle. The first flow channel for combustion-supporting gas is used to guide the combustion-supporting gas. A corrective gas flow channel is also provided inside the nozzle. The corrective gas flow channel is used to guide corrective gas. The corrective gas is used to confine the combustion-supporting gas. The corrective gas outlet of the corrective gas flow channel is circumferentially arranged around the combustion-supporting gas outlet of the first flow channel.
[0009] As a preferred embodiment of a laser cutting nozzle, the nozzle is provided with a first cooling channel, which is arranged around the first channel of the combustion-supporting gas.
[0010] As a preferred embodiment of a laser cutting nozzle, the first cooling channel includes two channel sections, a first cooling inlet, and a first cooling outlet. The first cooling inlet and the first cooling outlet are located on both radial sides of the nozzle, and the two ends of the two channel sections are respectively connected to the first cooling inlet and the first cooling outlet.
[0011] As a preferred embodiment of a laser cutting nozzle, the corrective gas flow channel includes a corrective gas inlet and a gas equalization chamber connected between the corrective gas inlet and the corrective gas outlet, wherein the gas equalization chamber is arranged in a ring around the first flow channel of the combustion-supporting gas.
[0012] As a preferred embodiment of a laser cutting nozzle, the width of the corrective gas flow channel gradually decreases along the direction from the uniform gas chamber to the corrective gas outlet.
[0013] As a preferred embodiment of a laser cutting nozzle, the laser cutting nozzle further includes a nozzle holder, wherein a second flow channel for combustion-supporting gas is provided in the nozzle holder extending along its axial direction, and the second flow channel for combustion-supporting gas is connected to the first flow channel for combustion-supporting gas; the nozzle is detachably connected to the nozzle holder.
[0014] As a preferred embodiment of a laser cutting nozzle, a second cooling channel is provided inside the nozzle holder, and the second cooling channel is arranged around the second channel of the combustion-supporting gas.
[0015] As a preferred embodiment of a laser cutting nozzle, the second cooling channel is spirally arranged along the axial direction of the nozzle holder.
[0016] As a preferred embodiment of a laser cutting nozzle, the second cooling channel is provided with a second cooling inlet and a second cooling outlet at both ends, and the second cooling inlet and the second cooling outlet are located on the radial sides of the nozzle holder.
[0017] Laser cutting equipment, including the laser cutting nozzle described in any of the above embodiments.
[0018] The beneficial effects of this utility model are as follows:
[0019] This invention features a first flow channel for the combustion-supporting gas in the nozzle, allowing the combustion-supporting gas to flow along both the first and second flow channels. Simultaneously, a corrective gas flow channel is also provided within the nozzle, with its outlet circumferentially positioned around the outlet of the first flow channel, allowing the corrective gas to flow along it. The first flow channel guides the combustion-supporting gas, while the corrective gas flow channel guides the corrective gas. The corrective gas confines the combustion-supporting gas within the annular flow of corrective gas. Therefore, when increasing the height between the laser cutting nozzle and the workpiece, the dispersion of the combustion-supporting gas is reduced, ensuring a stable atmosphere in the cutting area and improving cutting quality. By independently configuring the auxiliary and corrective gas flow channels, the gas flow rate and pressure can be precisely and independently adjusted according to the workpiece's material and thickness. For example, when cutting thin plates, the gas flow rate can be reduced to avoid impact deformation; when cutting thick plates, the gas flow rate and pressure can be increased to enhance slag removal. This design improves the flexibility of airflow control in laser cutting nozzles, significantly expanding the application range of laser cutting equipment. Simultaneously, the separate control of the two gases results in better stability and higher intensity, enabling rapid and thorough removal of molten slag from the cutting surface. This effectively enhances the slag removal capability, allowing for continuous and efficient cutting; it reduces cutting interruptions and secondary cleaning time caused by slag accumulation; and it greatly improves the production efficiency of laser cutting when cutting workpieces of the same thickness and material. Furthermore, the modified gas flow channel design restricts the dispersion of the combustion-supporting gas during cutting, increasing the cutting distance and keeping the nozzle away from the workpiece during use. This prevents damage from high temperatures and molten slag impact, extending nozzle life and reducing equipment maintenance costs. The modified gas also has a cooling function, which helps reduce nozzle temperature during operation. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of a laser cutting nozzle provided in a specific embodiment of the present invention;
[0022] Figure 2This is a schematic diagram from another perspective of the laser cutting nozzle provided in a specific embodiment of this utility model;
[0023] Figure 3 This is a cross-sectional view of the laser cutting nozzle provided in a specific embodiment of this utility model.
[0024] In the picture:
[0025] 100. Nozzle; 110. First channel for combustion-supporting gas; 111. Outlet for combustion-supporting gas; 112. Laval channel; 120. Correction gas channel; 121. Outlet for correction gas; 122. Inlet for correction gas; 123. Gas equalization chamber; 130. First cooling channel; 131. First cooling inlet; 132. First cooling outlet;
[0026] 200, Nozzle holder; 210, Second flow channel for combustion-supporting gas; 211, Inlet for combustion-supporting gas; 220, Second cooling flow channel; 221, Second cooling inlet; 222, Second cooling outlet. Detailed Implementation
[0027] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "second" and "first" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "second position" and "first position" refer to two different positions.
[0029] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0032] like Figures 1-3 As shown, this embodiment provides a laser cutting nozzle, which includes a nozzle 100. A first flow channel 110 for combustion-supporting gas is provided inside the nozzle 100, which is used to guide the combustion-supporting gas. A correction gas flow channel 120 is also provided inside the nozzle 100, which is used to guide correction gas. The correction gas is used to bind the combustion-supporting gas. The correction gas outlet 121 of the correction gas flow channel 120 is arranged circumferentially around the combustion-supporting gas outlet 111 of the first flow channel 110.
[0033] By providing a first combustion-supporting gas flow channel 110 in the nozzle 100, and simultaneously providing a corrective gas flow channel 120 within the nozzle 100, with the corrective gas outlet 121 of the corrective gas flow channel 120 circumferentially positioned around the combustion-supporting gas outlet 111 of the first combustion-supporting gas flow channel 110, the corrective gas can flow along the corrective gas flow channel 120. The first combustion-supporting gas flow channel 110 guides the combustion-supporting gas, and the corrective gas flow channel 120 guides the corrective gas. The corrective gas confines the combustion-supporting gas within the annular corrective gas flow. Therefore, when increasing the height between the laser cutting nozzle and the workpiece to be cut, the dispersion of the combustion-supporting gas can be reduced, thereby ensuring the atmosphere in the cutting area and improving cutting quality. By independently configuring the flow channels for the auxiliary and corrective gases, the gas flow rate and pressure entering different channels can be precisely and independently adjusted according to the workpiece's material and thickness. For example, when cutting thin plates, the gas flow rate can be reduced to avoid impact deformation; when cutting thick plates, the gas flow rate and pressure can be increased to enhance slag removal. This improves the flexibility of airflow control in laser cutting nozzles and significantly expands the application range of laser cutting equipment. Simultaneously, separate control of the two gases results in better stability and higher intensity, enabling rapid and thorough removal of molten slag from the cutting surface, effectively enhancing the slag removal capability and allowing for continuous and efficient cutting; reducing cutting interruptions and secondary cleaning time caused by slag accumulation; and significantly improving laser cutting production efficiency when cutting workpieces of the same thickness and material. Furthermore, the modified gas flow channel 120 restricts the dispersion of the combustion-supporting gas during cutting, increasing the cutting distance and keeping the nozzle 100 away from the workpiece during use, preventing damage from high temperatures and molten slag impact, extending the nozzle 100's service life, and reducing equipment maintenance costs; the modified gas also has a cooling function, which helps reduce the temperature of the nozzle 100 during operation.
[0034] Preferably, the corrective gas outlet 121 is an annular outlet concentric with the combustion-supporting gas outlet 111. This arrangement ensures that the corrective effect of the corrective gas on the combustion-supporting gas is more uniform along the circumferential direction of the annulus.
[0035] It is worth noting that the inner wall of the annular corrective gas outlet 121 is arranged parallel to the axis of the combustion-supporting gas outlet 111. In this embodiment, the annular corrective gas outlet 121 is concentric with the combustion-supporting gas outlet 111, and the inner wall of the annular corrective gas outlet 121 is also parallel to the axis of the combustion-supporting gas outlet 111. It is understood that those skilled in the art can adjust whether the axes of the annular corrective gas outlet 121 and the combustion-supporting gas outlet 111 are concentric, the direction of eccentricity, and whether the inner wall of the annular corrective gas outlet 121 is parallel to the axis of the combustion-supporting gas outlet 111, and the direction of the included angle, according to actual needs, in order to adjust the corrective effect of the corrective gas. No specific limitations are made here.
[0036] For example, the combustion-supporting gas can be oxygen, air, etc.; the corrective gas can be oxygen, nitrogen, argon, air, etc., or a mixture of two or more of these gases.
[0037] Specifically, the laser cutting nozzle is also provided with a nozzle holder 200, and a second flow channel 210 for combustion-supporting gas extending along its axial direction is provided inside the nozzle holder 200; the nozzle 100 is connected to the nozzle holder 200, and the first flow channel 110 for combustion-supporting gas and the second flow channel 210 for combustion-supporting gas extend in the same direction and are connected, and the combustion-supporting gas can flow along the second flow channel 210 for combustion-supporting gas and the first flow channel 110 for combustion-supporting gas.
[0038] Furthermore, the nozzle 100 is detachably connected to the nozzle holder 200, so that the operator can select the appropriate nozzle holder 200 according to the focal length required for laser welding; it also facilitates the replacement of a new nozzle 100.
[0039] Specifically, a second cooling channel 220 is provided inside the nozzle holder 200, and the second cooling channel 220 is arranged around the second combustion gas channel 210. By providing the second cooling channel 220, the nozzle holder 200 is cooled, which helps to improve the stability of the performance of the nozzle holder 200 in the harsh working environment of molten slag impact. For example, the nozzle holder 200 is made of a high thermal conductivity material, such as copper and copper alloys, silicon carbide, etc.
[0040] Preferably, the second cooling channel 220 is spirally arranged along the axial direction of the nozzle seat 200. By setting the second cooling channel 220 in a spiral shape, it is beneficial to extend the length of the second cooling channel 220 and improve the cooling effect.
[0041] Furthermore, the second cooling channel 220 is provided with a second cooling inlet 221 and a second cooling outlet 222 at both ends, thereby realizing the entry and exit of the cooling medium; the second cooling inlet 221 and the second cooling outlet 222 are located on both radial sides of the nozzle holder 200 for easy connection of cooling pipes. Optionally, the second cooling inlet 221 and the second cooling outlet 222 are located at the end of the nozzle holder 200 away from the nozzle 100, so that the second cooling channel 220 has a larger cooling area and can also reduce the impact of heat radiated during laser cutting on the cooling pipes. At the same time, the combustion-supporting gas inlet 211 is also located at the end of the nozzle holder 200 away from the nozzle 100.
[0042] For example, the cooling medium in the second cooling channel 220 can be cooling water. In this case, a chiller is also provided between the second cooling inlet 221 and the second cooling outlet 222. The cooling medium discharged from the second cooling outlet 222 is conditioned by the chiller and then re-enters the second cooling inlet 221 for circulation, ensuring that the heat radiated from the substrate and transferred by the nozzle 100 during cutting can be quickly removed. In other embodiments, the cooling medium can also be gas. Accordingly, different cooling medium circulation devices can be provided between the second cooling inlet 221 and the second cooling outlet 222 depending on the cooling medium.
[0043] Understandably, the cooling medium enters through the second cooling inlet 221, flows spirally around the second combustion gas channel 210 from the end furthest from the nozzle 100 to the end closest to the nozzle 100, and then spirally flows again from the end closest to the nozzle 100 to the second cooling outlet 222, finally exiting through the second cooling outlet 222. To ensure cooling effectiveness, the second combustion gas channel 210 is axially arranged with a second cooling channel 220 for at least 80% of its length. Preferably, the diameter of the second combustion gas channel 210 closer to the nozzle 100 is smaller, which helps to increase the flow velocity of the combustion gas. Correspondingly, the spiral diameter of the second cooling channel 220 closer to the nozzle 100 is also smaller, making the distance between the second cooling channel 220 and the second combustion gas channel 210 tend to be consistent, thereby ensuring the stability of the cooling effect.
[0044] In this embodiment, the nozzle 100 is provided with a first cooling channel 130, which surrounds the first combustion gas channel 110. By providing the first cooling channel 130 to cool the nozzle 100, the stability of the nozzle 100's performance under harsh working conditions of molten slag impact is improved. Optionally, the cooling medium in the first cooling channel 130 can be cooling water. A chiller is also provided between the first cooling inlet 131 and the first cooling outlet 132. Cooling water enters the first cooling channel 130 from the first cooling inlet 131 and exits from the first cooling outlet 132. The discharged coolant is temperature-adjusted by the chiller and then re-enters the first cooling inlet 131 for circulation. This can quickly remove the heat radiated by the substrate during cutting, as well as the thermal impact of stray laser light on the nozzle 100. In other embodiments, the cooling medium can also be gas. Accordingly, depending on the cooling medium, different cooling medium circulation devices can be provided between the first cooling inlet 131 and the first cooling outlet 132.
[0045] For example, the nozzle 100 is made of a high thermal conductivity material, such as copper and copper alloys, silicon carbide, etc. Optionally, since the nozzle 100 has a relatively complex structure, including a first combustion gas channel 110, a first cooling channel 130, and a corrective gas channel 120, it can be manufactured using 3D printing technology. In addition, a Laval channel 112 is provided at one end of the first combustion gas channel 110 near the combustion gas outlet 111, which helps to increase the airflow velocity.
[0046] Optionally, the cross-section of the first cooling channel 130 is rhomboid, and the major axis of the rhombus is parallel to the axial direction of the first combustion gas channel 110, which is beneficial to increasing the relative area between the cooling medium and the first combustion gas channel 110 in the first cooling channel 130, thereby improving the cooling effect.
[0047] Specifically, the first cooling channel 130 includes two channel sections, a first cooling inlet 131, and a first cooling outlet 132. The two ends of the two channel sections are connected to the first cooling inlet 131 and the first cooling outlet 132, respectively. The first cooling inlet 131 and the first cooling outlet 132 are used for the inflow and outflow of cooling medium from the channel sections. The channel sections are circumferentially arranged around the first combustion gas channel 110 at a 180° angle, providing a flow channel structure for the cooling medium. By setting two channel sections, a flow channel structure is provided circumferentially around the first combustion gas channel 110. This extends the contact distance between the cooling medium and the first combustion gas channel 110, thereby increasing the cooling area of the first combustion gas channel 110 and improving the cooling effect. The first cooling inlet 131 and the first cooling outlet 132 are located on both radial sides of the nozzle 100 for easy connection to cooling pipes.
[0048] It is worth noting that the laser cutting nozzle is equipped with separately controllable combustion-supporting gas and correction gas, as well as separately controllable second cooling channel 220 and first cooling channel 130. This allows the laser cutting nozzle to adapt to workpieces of various thicknesses, such as thin plates, medium-thick plates, and thick plates; it can also adapt to the laser cutting needs of various materials, such as carbon steel, stainless steel, and aluminum alloys, making it suitable for a wider range of cutting scenarios.
[0049] For example, the corrective gas flow channel 120 includes a corrective gas inlet 122, wherein the corrective gas flow channel 120 is also connected to a gas equalization chamber 123 disposed between the corrective gas inlet 122 and the corrective gas outlet 121.
[0050] Optionally, the width of the uniform gas chamber 123 is greater than the width of the correction gas inlet 122, and it is arranged around the first flow channel 110 of the combustion-supporting gas. By setting the uniform gas chamber 123, it is beneficial to uniformly distribute the flow velocity of the correction gas from the correction gas inlet 122, making the flow velocity of the correction gas exiting the correction gas outlet 121 more uniform, thereby ensuring a more stable confinement effect on the laser-supporting combustion gas, and at the same time ensuring the stability of the convergence effect of the laser-supporting combustion gas within a certain distance.
[0051] Preferably, the width of the corrective gas flow channel 120 gradually decreases along the direction from the uniform gas chamber 123 to the corrective gas outlet 121. This arrangement helps to accelerate the flow of the corrective gas, thereby improving the constraint effect of the corrective gas on the combustion-supporting gas.
[0052] In this embodiment, the corrective gas outlet 121 and the combustion-supporting gas outlet 111 are located on the same plane, which strengthens the binding effect of the corrective gas on the combustion-supporting gas without affecting the normal flow of the combustion-supporting gas. In other embodiments, the corrective gas outlet 121 and the combustion-supporting gas outlet 111 may also be set to not be on the same plane, such as the corrective gas outlet 121 being higher than the combustion-supporting gas outlet 111, or the corrective gas outlet 121 being lower than the second combustion-supporting gas outlet 111. Those skilled in the art can set it according to the actual binding needs of the corrective gas on the combustion-supporting gas, and no specific limitation is made here.
[0053] This embodiment also discloses a laser cutting device, including a laser cutting nozzle as described in any of the above embodiments. The laser cutting device equipped with the aforementioned laser cutting nozzle allows for more flexible and optimized gas flow and more diverse cooling methods. Therefore, it can maintain stable structure and performance even under harsh working environments with high temperature, high pressure airflow, and molten slag impact; it also has a longer service life, significantly reducing equipment maintenance costs and downtime.
[0054] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A laser cutting nozzle, characterized in that, include: A nozzle (100) is provided with a first flow channel (110) for combustion-supporting gas, which is used to guide the combustion-supporting gas. A correction gas flow channel (120) is also provided in the nozzle (100), which is used to guide correction gas. The correction gas is used to bind the combustion-supporting gas. The correction gas outlet (121) of the correction gas flow channel (120) is arranged around the combustion-supporting gas outlet (111) of the first flow channel (110).
2. The laser cutting nozzle according to claim 1, characterized in that, The nozzle (100) is provided with a first cooling channel (130), which is arranged around the first channel (110) of the combustion-supporting gas.
3. The laser cutting nozzle according to claim 2, characterized in that, The first cooling channel (130) includes two channel sections, a first cooling inlet (131) and a first cooling outlet (132). The first cooling inlet (131) and the first cooling outlet (132) are disposed on both radial sides of the nozzle (100), and the two ends of the two channel sections are respectively connected to the first cooling inlet (131) and the first cooling outlet (132).
4. The laser cutting nozzle according to claim 1, characterized in that, The corrected gas flow channel (120) includes a corrected gas inlet (122) and a gas equalization chamber (123) connected between the corrected gas inlet (122) and the corrected gas outlet (121), the gas equalization chamber (123) being arranged around the first flow channel (110) of the combustion-supporting gas.
5. The laser cutting nozzle according to claim 4, characterized in that, Along the direction from the gas equalization chamber (123) to the corrected gas outlet (121), the width of the corrected gas flow channel (120) gradually decreases.
6. The laser cutting nozzle according to any one of claims 1-5, characterized in that, The laser cutting nozzle also includes a nozzle holder (200), in which a second combustion-supporting gas channel (210) extending along its axial direction is provided, and the second combustion-supporting gas channel (210) is connected to the first combustion-supporting gas channel (110); the nozzle (100) is detachably connected to the nozzle holder (200).
7. The laser cutting nozzle according to claim 6, characterized in that, The nozzle holder (200) is provided with a second cooling channel (220), which is arranged around the second combustion gas channel (210).
8. The laser cutting nozzle according to claim 7, characterized in that, The second cooling channel (220) is spirally arranged along the axial direction of the nozzle seat (200).
9. The laser cutting nozzle according to claim 8, characterized in that, The second cooling channel (220) is provided with a second cooling inlet (221) and a second cooling outlet (222) at both ends, and the second cooling inlet (221) and the second cooling outlet (222) are located on the radial sides of the nozzle seat (200).
10. A laser cutting device, characterized in that, Including the laser cutting nozzle as described in any one of claims 1-9.