Automobile part laser cutting equipment with cooling function

Abstract

According to the automobile part laser cutting equipment with the cooling function, annular grooves are formed in a focus lens and a protective lens, a second lens base with an annular cavity and a third lens base with an annular cavity are matched, cooling liquid makes direct contact with the inner wall of the edge of a lens, and the mode that a cooling channel is arranged in a traditional lens base is replaced; heat accumulated on the lens directly exchanges heat with cooling liquid, the heat dissipation efficiency is greatly improved, meanwhile, the sealing performance of the connecting position of the lens and the lens base is strengthened through the upper silica gel pad and the lower silica gel pad, and the liquid leakage risk is effectively reduced; in addition, a detachable structure is formed by the positioning tube, the insertion tube and the threaded cover, so that the maintainability of the laser head is improved; in addition, an air cooling mechanism formed by the rotating cylinder and the spherical nozzle cooperates with liquid cooling, the cooling effect of the protective glass is further optimized, meanwhile, slag dust on the lower end face of the protective glass is cleaned through high-pressure airflow, local temperature rise caused by heat absorption of the dust is reduced, and the overall cooling performance is enhanced.

Description

Technical Field

[0001] This invention relates to the field of cutting, and in particular to a laser cutting device for automotive parts with a cooling function. Background Technology

[0002] In automotive parts processing, laser cutting equipment has become a core tool for manufacturing key components such as body structural parts and airbag components due to its advantages of high precision and high efficiency. It achieves rapid cutting of metal materials through high-energy laser beams, meeting the automotive industry's stringent requirements for lightweight and complex shapes. However, the laser head generates a lot of heat during operation, with the main heat sources coming from the focusing lens and the protective lens: the focusing lens experiences a sharp increase in local temperature due to the concentration of the light source, while the protective lens heats up due to the radiant heat generated by the melting of the solder. This heat may cause thermal deformation of materials or overheating of equipment components, affecting the cutting quality and equipment lifespan.

[0003] The existing patent with publication number CN117773365B discloses a laser cutting head and its cooling device. By setting up an annular hollow liquid tank, an annular partition, a pressure regulating component, a driving component, and a transmission component, the partition divides the liquid tank into multiple chambers in the vertical direction under the driving action of the driving component and the transmission action of the transmission component, allowing the coolant to flow downward in stages. This ensures that the coolant temperature is always lower than the temperature of the laser cutting head, improves the cooling effect and the degree of cooling precision, maintains the entire cutting head within a safe temperature range, and avoids damage to it due to high surface temperature.

[0004] The existing patent with publication number CN113118621B discloses a cooling cutting head for laser cutting. It is configured with a support part, a connecting part, a lens barrel part and an inverted cone part. The connecting part connects the support part and the lower lens barrel part. The inverted cone part is equipped with a cutting nozzle. The lens barrel part surrounds the sensor. The lens barrel part has a built-in water cooling mechanism and an air cooling mechanism that surround the sensor and makes the two work together. This avoids the great limitation of the inner wall thickness of the water cooling mechanism on the cooling effect of the laser cutting head. At the same time, it ensures that all parts of the cutting head are compatible and installed, meeting the structural and cooling requirements of laser cutting.

[0005] The aforementioned prior art discloses a technical solution for achieving refined cooling by using transmission components and baffles to make the coolant flow in stages. It also discloses a technical solution for achieving efficient cooling by using a water-cooling mechanism and an air-cooling mechanism that surround the sensor in synergy. However, the prior art still has shortcomings. The existing cooling structure of the laser head mainly adopts the method of setting the cooling structure on the outside or inside of the laser head housing. The coolant mainly contacts the housing of the laser head, while the heat source of the laser head is mainly the focusing lens and the protective lens. The cooling is not targeted and the cooling effect is not high. Summary of the Invention

[0006] The core of this invention lies in solving the problem of low cooling efficiency caused by insufficient targeted cooling in the prior art by using a lens with an annular groove and a lens mount with an annular cavity. At the same time, by setting a spherical nozzle below the protective lens, the cooling effect is further improved and the problem of local overheating caused by molten slag accumulation is reduced.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A laser cutting device for automotive parts with a cooling function includes a housing. Inside the housing, a collimating lens, a focusing lens, and a protective lens are arranged sequentially from top to bottom. A lens mount 1 is fixedly connected to the side end of the collimating lens and is threadedly connected to the housing. The focusing lens is fixedly connected to the inner wall of the housing via a lens mount 2, and the protective lens is fixedly connected to the inner wall of the housing via a lens mount 3. Lens mount 2 and lens mount 3 have the same structure. Lens mount 2 includes a mounting ring. An end cap is bolted to the upper end of the mounting ring. The mounting ring and the end cap form an annular cavity. An upper silicone pad and a lower silicone pad, symmetrically distributed, are fixedly connected to the inner wall of the annular cavity. The focusing lens is located between the upper silicone pad and the lower silicone pad and is fixedly connected to both. An annular groove is formed on the outer peripheral sidewall of both the focusing lens and the protective lens, and the annular groove communicates with the annular cavity. The mounting ring has an internal threaded connection to a pair of positioning tubes extending to the outside of the housing. The inner ends of both positioning tubes are connected to the annular cavity. Inserted tubes are inserted into the outer ends of the positioning tubes. The outer ends of the inserted tubes are pressed and fixed by threaded caps. The threaded caps are threadedly connected to the positioning tubes. An inlet pipe is fixedly connected between the pair of inserted tubes on the same side. The outer ends of the pair of inserted tubes on the other side are connected to a drain pipe. Both the inlet pipe and the drain pipe are connected to the external coolant circulation mechanism.

[0009] Furthermore, an optical fiber connector is fixedly connected to the upper end of the mirror mount, and a nozzle is fixedly connected to the lower end of the housing. An air hole is opened at the center of the nozzle, and a through hole communicating with the air hole is opened at the lower end of the housing.

[0010] Furthermore, the shell has a cylindrical structure, the mounting ring and end cap are both annular structures, and the upper and lower silicone pads are both annular sealing rings with L-shaped cross-sections.

[0011] Furthermore, the inner end of the positioning tube has an external thread on its outer wall, and the side wall of the mounting ring has a threaded cavity that mates with the positioning tube. The threaded cavity is connected to the annular cavity, and the inner wall of the threaded cavity has an internal thread groove that mates with the external thread. The outer wall of the housing has a positioning hole through which the positioning tube moves.

[0012] Furthermore, a flow divider is fixedly connected to the inner end opening of the positioning tube, which divides the inner end outlet of the positioning tube into two parts.

[0013] Furthermore, a conical cylinder is fixedly connected between the protective mirror and the bottom wall of the housing. An annular cavity is formed between the outer wall of the conical cylinder and the inner wall of the housing. An air inlet pipe is fixedly connected to the outer wall of the housing. The inner end of the air inlet pipe is connected to the annular cavity, and the outer end of the air inlet pipe is connected to an external high-pressure gas supply mechanism. The lower end of the conical cylinder is connected to a nozzle. A rotating cylinder is provided in the middle of the conical cylinder. Multiple spherical nozzles are installed on the rotating cylinder. Spray holes are opened on the spherical nozzles. The inner orifice of the spray hole faces the lower end face of the protective mirror, and the outer orifice of the spray hole is connected to the annular cavity.

[0014] Furthermore, a gear ring is fixedly connected to the outer end of the rotating cylinder, and a drive gear is meshed with the gear ring. The drive gear is fixedly connected to the output shaft of the motor, and the outer casing of the motor is fixedly connected to the outer wall of the housing. The spherical nozzle is rotatably connected to the rotating cylinder. The outer part of the spherical nozzle located on the rotating cylinder is hinged to a connecting rod, and a sliding frame is hinged to the outer end of the connecting rod. The sliding frame is slidably connected to a grooved plate, and the outer end of the grooved plate is fixedly connected to the inner wall of the housing. Annular wave grooves are opened on both the upper and lower end faces of the grooved plate. A pair of symmetrical sliding columns are fixedly connected to the inner wall of the sliding frame, and the sliding columns are slidably connected to the inside of the annular wave grooves.

[0015] Furthermore, the front and rear ends of the spherical nozzle are fixedly connected to rotating shafts, which are inserted into the rotating cylinder and rotatably connected thereto. The lower end of the toothed ring is rotatably connected to a guide rail, which is fixedly connected to the bottom wall of the housing.

[0016] Furthermore, an annular protrusion is provided near the edge of the outer end of the nozzle. The annular protrusion is integrally formed with the nozzle, and an annular cavity is formed between the two. A branch pipe is fixedly connected to the outer wall of the annular protrusion. The lower end of the branch pipe is tangentially connected to the annular cavity, and the upper end of the branch pipe is connected to the air inlet pipe. An electromagnetic flow valve is fixedly connected to the branch pipe.

[0017] Compared with the prior art, the advantages of this invention are: (1) By setting annular grooves and lens mounts 2 and 3 on the focusing lens and protective lens, the coolant can directly contact the inner edge of the focusing lens and protective lens, replacing the cooling channel opened inside the lens mount. This allows the heat accumulated on the lens to directly exchange with the coolant, improving the heat dissipation efficiency. At the same time, the upper and lower silicone pads improve the sealing of the lens-lens connection and reduce the probability of leakage. In addition, the detachable structure consisting of positioning tube, insertion tube and threaded cap facilitates the disassembly and assembly of lens mounts 2 and 3, improving the maintainability of the laser head.

[0018] (2) The present invention uses a rotating cylinder and a spherical nozzle to spray high-pressure airflow onto the lower end face of the protective mirror. Combined with liquid cooling, this improves the cooling effect on the protective mirror. In addition, the high-pressure airflow is used to spray and clean the lower end face of the protective mirror, reducing the molten slag dust adhering to the lower end face of the protective mirror and reducing the local temperature rise caused by the heat absorption of molten slag, thereby further improving the cooling effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a cross-sectional view of the focusing lens and the second lens mount in this invention. Figure 4 This is an exploded structural diagram of the focusing lens and lens mount 2 in this invention; Figure 5 This is a cross-sectional view of the positioning tube and insertion tube in this invention; Figure 6 This is a schematic diagram of the coolant flow structure within the annular groove in this invention; Figure 7 This is a three-dimensional structural diagram of the conical cylinder and spherical nozzle in this invention; Figure 8 This is a cross-sectional view of the conical cylinder and spherical nozzle in this invention; Figure 9 This is a schematic diagram of the explosive assembly structure of the conical cylinder and the spherical nozzle in this invention; Figure 10 This is a schematic diagram of the high-pressure airflow in this invention; Figure 11 This is a cross-sectional view of the nozzle in this invention.

[0020] Explanation of the labels in the diagram: 1. Housing; 2. Fiber optic connector; 3. Collimating lens; 4. Lens mount one; 5. Focusing lens; 501. Annular groove; 6. Lens mount two; 7. Protective lens; 8. Lens mount three; 9. Nozzle; 901. Annular protrusion; 10. Air inlet pipe; 11. Mounting ring; 12. End cap; 13. Upper silicone pad; 14. Lower silicone pad; 15. Positioning tube; 1501. Diverter plate; 16. Insert tube; 17. Threaded cap; 18. Liquid inlet pipe; 19. Liquid outlet pipe; 20. Conical cylinder; 21. Rotating cylinder; 22. Spherical nozzle; 2201. Nozzle; 2202. Rotating shaft; 23. Connecting rod; 24. Sliding frame; 2401. Sliding column; 25. Groove; 2501. Annular corrugated groove; 26. Gear ring; 27. Guide rail; 28. Drive gear; 29. ​​Motor; 30. Branch pipe; 31. Electromagnetic flow valve. Detailed Implementation

[0021] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0022] First implementation method Please see Figures 1-6In one embodiment of the present invention, a laser cutting device for automotive parts with cooling function includes a housing 1. Inside the housing 1, a collimating lens 3, a focusing lens 5, and a protective lens 7 are arranged sequentially from top to bottom. A lens mount 4 is fixedly connected to the side end of the collimating lens 3. The lens mount 4 is threadedly connected to the housing 1. The focusing lens 5 is fixedly connected to the inner wall of the housing 1 through a lens mount 6. The protective lens 7 is fixedly connected to the inner wall of the housing 1 through a lens mount 8. The lens mount 6 and the lens mount 8 have the same structure. The lens mount 6 includes a mounting ring 11. An end cap 12 is bolted to the upper end of the mounting ring 11. The mounting ring 11 and the end cap 12 form an annular cavity. An upper silicone pad 13 and a lower silicone pad 14, which are symmetrically distributed, are fixedly connected to the inner wall of the annular cavity. The focusing lens 5 is located between the upper silicone pad 13 and the lower silicone pad 14 and is fixedly connected to them. An annular groove 501 is opened on the outer peripheral side wall of the focusing lens 5 and the protective lens 7. The annular groove 501 communicates with the annular cavity (i.e., the annular cavity formed by the mounting ring 11 and the end cap 12). Please see Figure 2 and Figure 3 A pair of positioning tubes 15 extending to the outside of the housing 1 are connected to the inner thread of the mounting ring 11. The inner ends of the pair of positioning tubes 15 are connected to the annular cavity. Insertion tubes 16 are inserted into the outer ends of the positioning tubes 15. The outer ends of the insertion tubes 16 are pressed and fixed by threaded caps 17. The threaded caps 17 are threadedly connected to the positioning tubes 15. An inlet pipe 18 is fixedly connected between the pair of insertion tubes 16 on the same side. A drain pipe 19 is fixedly connected between the pair of insertion tubes 16 on the other side. Both the inlet pipe 18 and the drain pipe 19 are connected to the external coolant circulation mechanism. The external coolant circulation mechanism injects coolant into the annular cavity of mirror base 2 6 and mirror base 3 8 through the inlet pipe 18, insertion tubes 16 and positioning tubes 15, and then discharges it through the positioning tubes 15 and insertion tubes 16 on the other side.

[0023] It should be noted that the external coolant circulation mechanism includes a circulation pump, a radiator, and a temperature control system, which are existing technologies and will not be described in detail in this application.

[0024] Compared to traditional laser head cooling structures, this invention abandons the method of opening cooling channels inside the lens mount. Instead, by setting annular grooves 501 on the focusing lens 5 and protective lens 7, as well as lens mount 2 6 and lens mount 3 8, the coolant directly contacts the inner edge of the focusing lens 5 and protective lens 7, replacing the cooling channels opened inside the lens mount. This allows the heat accumulated on the lens to directly exchange with the coolant, improving heat dissipation efficiency. At the same time, the upper silicone pad 13 and lower silicone pad 14 improve the sealing at the connection between the lens and the lens mount, reducing the probability of leakage. Furthermore, the detachable structure composed of positioning tube 15, insertion tube 16, and threaded cap 17 facilitates the disassembly and assembly of lens mount 2 6 and lens mount 3 8, improving the maintainability of the laser head.

[0025] Please see Figure 1 and Figure 2The upper end of the mirror mount 4 is fixedly connected to an optical fiber connector 2, and the lower end of the housing 1 is fixedly connected to a nozzle 9. An air hole is opened at the center of the nozzle 9, and a through hole communicating with the air hole is opened at the lower end of the housing 1.

[0026] Specifically, fiber optic connector 2 is used to fix the incident fiber. After the laser passes through collimating lens 3, focusing lens 5 and protective lens 7, it is emitted from the air hole of nozzle 9.

[0027] Please see Figure 1 , Figure 2 and Figure 4 The housing 1 has a cylindrical structure, the mounting ring 11 and the end cap 12 are both ring structures, the upper silicone pad 13 and the lower silicone pad 14 are both annular sealing rings, and their cross-sections are L-shaped.

[0028] Specifically, the contact position between the focusing lens 5 and the lens mount 6 is provided with an upper silicone pad 13 and a lower silicone pad 14, which improves the stability of clamping and fixing the focusing lens 5. At the same time, when the lens is deformed by heat, it reduces the mechanical stress and wear caused by thermal expansion and contraction on the lens. In addition, the upper silicone pad 13 and the lower silicone pad 14, which have an L-shaped cross section, provide better sealing for the coolant injected into the annular cavity.

[0029] Please see Figure 2 , Figure 4 and Figure 5 The inner end of the positioning tube 15 has an external thread on its outer wall, and the side wall of the mounting ring 11 has a threaded cavity that mates with the positioning tube 15. The threaded cavity is connected to the annular cavity. The inner wall of the threaded cavity has an internal thread groove that mates with the external thread. The outer wall of the housing 1 has a positioning hole through which the positioning tube 15 moves.

[0030] Specifically, the positioning tube 15 enables the rapid positioning and disassembly / removal of mirror mounts 2 6 and 3 8 from the housing 1.

[0031] Please see Figure 5 and Figure 6 A flow divider 1501 is fixedly connected to the inner end opening of the positioning tube 15. The flow divider 1501 divides the inner end outlet of the positioning tube 15 into two parts, thereby dividing the coolant into two streams that flow along the front and rear walls of the annular groove 501 respectively, thereby enhancing the heat exchange uniformity.

[0032] Specifically, after the coolant is injected into the positioning pipe 15, it is divided into two coolant streams under the action of the diverter plate 1501. When the coolant flows through the annular groove 501, the two streams flow along the circumferential sides of the annular groove 501 and come into contact with the groove wall. After converging, they flow out from the positioning pipe 15 on the other side, which improves the contact effect between the coolant and the annular groove 501.

[0033] Second implementation method Based on the first implementation, please refer to Figure 2 and Figures 7-11 A conical cylinder 20 is fixedly connected between the protective mirror 7 and the bottom wall of the housing 1. An annular cavity is formed between the outer wall of the conical cylinder 20 and the inner wall of the housing 1. An air inlet pipe 10 is fixedly connected to the outer wall of the housing 1. The inner end of the air inlet pipe 10 is connected to the annular cavity, and the outer end of the air inlet pipe 10 is connected to an external high-pressure gas supply mechanism. The lower end of the conical cylinder 20 is connected to the nozzle 9. A rotating cylinder 21 is provided in the middle of the conical cylinder 20. Multiple spherical nozzles 22 are installed on the rotating cylinder 21. Spray holes 2201 are opened on the spherical nozzles 22. The inner orifice of the spray hole 2201 faces the lower end face of the protective mirror 7, and the outer orifice of the spray hole 2201 is connected to the annular cavity.

[0034] For details, please refer to Figure 10 After the high-pressure gas is injected into the annular cavity through the inlet pipe 10, it is sprayed onto the lower end face of the protective mirror 7 through the nozzle 2201 of the spherical nozzle 22. The high-pressure airflow carries away the heat accumulated on the lower end face of the protective mirror 7. At the same time, the high-pressure airflow blows away the molten slag dust adhering to the lower end face of the protective mirror 7, reducing the accumulation of molten slag dust on the protective mirror 7 and reducing the local temperature rise caused by the molten slag absorbing heat (when the laser passes through the protective mirror 7, it is blocked by the molten slag dust, causing the heat to be absorbed by the dust, and the local temperature of the protective mirror 7 rises). The external high-pressure gas supply mechanism includes a high-pressure gas storage tank and a gas pump. The high-pressure gas storage tank stores oxygen or nitrogen, which is the prior art and will not be described in detail in this application.

[0035] Please see Figures 7-9 A gear ring 26 is fixedly connected to the outer end of the rotating cylinder 21. The gear ring 26 meshes with a drive gear 28. The drive gear 28 is fixedly connected to the output shaft of the motor 29. The outer shell of the motor 29 is fixedly connected to the outer wall of the housing 1. The motor 29 drives the drive gear 28 to rotate, the drive gear 28 drives the gear ring 26 to rotate, the gear ring 26 drives the rotating cylinder 21 to rotate, and the rotating cylinder 21 drives the spherical nozzle 22 to rotate. The spherical nozzle 22 is rotatably connected to the rotating cylinder 21. The outer part of the spherical nozzle 22 is hinged to the connecting rod 23. The outer end of the connecting rod 23 is hinged to the sliding frame 24. The sliding frame 24 is slidably connected to the grooved plate 25. The outer end of the grooved plate 25 is fixedly connected to the inner wall of the housing 1. The upper and lower end faces of the grooved plate 25 are provided with annular wave grooves 2501. A pair of symmetrical sliding columns 2401 are fixedly connected to the inner wall of the sliding frame 24. The sliding columns 2401 are slidably connected to the inside of the annular wave grooves 2501. Please see Figure 8As the rotating cylinder 21 rotates, the spherical nozzle 22 drives the sliding frame 24 to move in a circular motion along the groove plate 25 via the connecting rod 23. At the same time, the sliding column 2401 slides in the annular wave groove 2501. Under the guidance of the annular wave groove 2501, the sliding frame 24 moves back and forth in the radial direction of the rotating cylinder 21. The sliding frame 24 drives the spherical nozzle 22 to swing back and forth via the connecting rod 23, periodically changing the orientation of the nozzle 2201, thereby increasing the blowing direction of the high-pressure airflow, improving the coverage of the high-pressure airflow for cleaning the lower end face of the protective mirror 7, and improving the cleaning effect.

[0036] Compared to traditional laser head cooling structures, this invention uses a rotating cylinder 21 and a spherical nozzle 22 to spray high-pressure airflow onto the lower end face of the protective mirror 7. Combined with liquid cooling, this improves the cooling effect on the protective mirror 7. Furthermore, the high-pressure airflow is used to clean the lower end face of the protective mirror 7, reducing the amount of molten slag and dust adhering to the lower end face of the protective mirror 7 and reducing the local temperature rise caused by the heat absorption of molten slag, further improving the cooling effect.

[0037] Please see Figure 2 and Figure 9 The spherical nozzle 22 is fixedly connected to a rotating shaft 2202 at both the front and rear ends. The rotating shaft 2202 is inserted into the rotating cylinder 21 and rotatably connected to it. The lower end of the toothed ring 26 is rotatably connected to a guide rail 27, which is fixedly connected to the bottom wall of the housing 1.

[0038] Specifically, the spherical nozzle 22 is hinged to the rotating shaft 2202, and the stability of the toothed ring 26 rotation is improved by the guide rail 27.

[0039] Please see Figure 2 and Figure 11 The nozzle 9 has an annular protrusion 901 near the edge of its outer end. The annular protrusion 901 is integrally formed with the nozzle 9, and an annular cavity is formed between the two. A branch pipe 30 is fixedly connected to the outer wall of the annular protrusion 901. The lower end of the branch pipe 30 is tangentially connected to the annular cavity, and the upper end of the branch pipe 30 is connected to the air inlet pipe 10. An electromagnetic flow valve 31 is fixedly connected to the branch pipe 30.

[0040] Specifically, the electromagnetic flow valve 31 is activated, allowing some of the high-pressure gas to enter the annular cavity through the branch pipe 30, forming a swirling flow that spirally blows onto the outer wall of the nozzle 9, reducing the slag and dust adhering to the outer wall of the nozzle 9, and improving the heat dissipation effect and service life of the nozzle 9. It should be noted that the electromagnetic flow valve 31 is existing technology and will not be described in detail in this application.

[0041] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A laser cutting device for automotive parts with a cooling function, characterized in that, The system includes a housing (1), inside which are arranged a collimating lens (3), a focusing lens (5), and a protective lens (7) arranged sequentially from top to bottom. A lens mount (4) is fixedly connected to the side end of the collimating lens (3), and the lens mount (4) is threadedly connected to the housing (1). The focusing lens (5) is fixedly connected to the inner wall of the housing (1) through a lens mount (6), and the protective lens (7) is fixedly connected to the inner wall of the housing (1) through a lens mount (8). The lens mounts (6) and (8) have the same structure. The device includes a mounting ring (11), an end cap (12) is bolted to the upper end of the mounting ring (11), the mounting ring (11) and the end cap (12) form an annular cavity, an upper silicone pad (13) and a lower silicone pad (14) are fixedly connected to the inner wall of the annular cavity, the focusing lens (5) is located between the upper silicone pad (13) and the lower silicone pad (14) and is fixedly connected to them, and an annular groove (501) is opened on the outer peripheral side wall of the focusing lens (5) and the protective lens (7), and the annular groove (501) communicates with the annular cavity; The mounting ring (11) has a pair of positioning tubes (15) that extend to the outside of the housing (1) and are threaded to the inside of the side end. The inner ends of the pair of positioning tubes (15) are connected to the annular cavity. The outer ends of the positioning tubes (15) are connected to the insertion tubes (16). The outer ends of the insertion tubes (16) are pressed and fixed by the threaded cap (17). The threaded cap (17) is threaded to the positioning tubes (15). The pair of insertion tubes (16) on the same side are fixedly connected to the liquid inlet pipe (18), and the pair of insertion tubes (16) on the other side are fixedly connected to the liquid outlet pipe (19). The liquid inlet pipe (18) and the liquid outlet pipe (19) are both connected to the external coolant circulation mechanism.

2. The laser cutting equipment for automotive parts with cooling function according to claim 1, characterized in that, The upper end of the mirror base (4) is fixedly connected to an optical fiber connector (2), and the lower end of the housing (1) is fixedly connected to a nozzle (9). An air hole is opened at the center of the nozzle (9), and a through hole communicating with the air hole is opened at the lower end of the housing (1).

3. The laser cutting equipment for automotive parts with cooling function according to claim 1, characterized in that, The housing (1) has a cylindrical structure, the mounting ring (11) and the end cap (12) are both ring structures, the upper silicone pad (13) and the lower silicone pad (14) are both annular sealing rings, and their cross-sections are L-shaped.

4. The laser cutting equipment for automotive parts with cooling function according to claim 1, characterized in that, The inner end of the positioning tube (15) is provided with an external thread on the outer wall. The side wall of the mounting ring (11) is provided with a threaded cavity that mates with the positioning tube (15). The threaded cavity is connected to the annular cavity. The inner wall of the threaded cavity is provided with an internal thread groove that mates with the external thread. The outer wall of the housing (1) is provided with a positioning hole for the positioning tube (15) to move through.

5. The laser cutting equipment for automotive parts with cooling function according to claim 4, characterized in that, A flow divider (1501) is fixedly connected to the inner end opening of the positioning tube (15), and the flow divider (1501) divides the inner end outlet of the positioning tube (15) into two parts.

6. The laser cutting equipment for automotive parts with cooling function according to claim 1, characterized in that, A conical cylinder (20) is fixedly connected between the protective mirror (7) and the bottom wall of the shell (1). An annular cavity is formed between the outer wall of the conical cylinder (20) and the inner wall of the shell (1). An air inlet pipe (10) is fixedly connected to the outer wall of the shell (1). The inner end of the air inlet pipe (10) is connected to the annular cavity, and the outer end of the air inlet pipe (10) is connected to an external high-pressure gas supply mechanism. The lower end of the conical cylinder (20) is connected to the nozzle (9). A rotating cylinder (21) is provided in the middle of the conical cylinder (20). Multiple spherical nozzles (22) are installed on the rotating cylinder (21). Spray holes (2201) are opened on the spherical nozzles (22). The inner orifice of the spray hole (2201) faces the lower end face of the protective mirror (7), and the outer orifice of the spray hole (2201) is connected to the annular cavity.

7. The laser cutting equipment for automotive parts with cooling function according to claim 6, characterized in that, The outer end of the rotating cylinder (21) is fixedly connected to a gear ring (26), which meshes with a drive gear (28). The drive gear (28) is fixedly connected to the output shaft of a motor (29), and the outer shell of the motor (29) is fixedly connected to the outer wall of the housing (1). The spherical nozzle (22) is rotatably connected to the rotating cylinder (21). The spherical nozzle (22) is hinged to a connecting rod (23) on the outer side of the rotating cylinder (21). The outer end of the connecting rod (23) is hinged to a sliding frame (24), which is slidably connected to a grooved plate (25). The outer end of the grooved plate (25) is fixedly connected to the inner wall of the housing (1). The upper and lower end faces of the grooved plate (25) are provided with annular wave grooves (2501). A pair of symmetrical sliding columns (2401) are fixedly connected to the inner wall of the sliding frame (24), and the sliding columns (2401) are slidably connected to the inside of the annular wave grooves (2501).

8. The laser cutting equipment for automotive parts with cooling function according to claim 6, characterized in that, The spherical nozzle (22) is fixedly connected to a rotating shaft (2202) at both the front and rear ends. The rotating shaft (2202) is inserted into the rotating cylinder (21) and rotated therewith. The lower end of the toothed ring (26) is rotatably connected to a guide rail (27), which is fixedly connected to the bottom wall of the housing (1).

9. A laser cutting equipment for automotive parts with cooling function according to claim 6, characterized in that, The nozzle (9) has an annular protrusion (901) near the edge of its outer end. The annular protrusion (901) and the nozzle (9) are integrally formed, forming an annular cavity between them. A branch pipe (30) is fixedly connected to the outer wall of the annular protrusion (901). The lower end of the branch pipe (30) is tangentially connected to the annular cavity. The upper end of the branch pipe (30) is connected to the air inlet pipe (10). An electromagnetic flow valve (31) is fixedly connected to the branch pipe (30).

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