High-precision laser cutting head

Abstract

The high-precision laser cutting head relates to the technical field of laser cutting and comprises a machine body and multi-head laser assemblies, the multi-head laser assemblies are arranged on the two sides of the machine body in a mirroring mode, each multi-head laser assembly comprises a large fluted disc, the large fluted discs are fixedly installed at the bottom end of the machine body, and guide rails are fixed to the two sides of the disc face of each large fluted disc in a mirroring mode; and a V-shaped pin is arranged in the guide rail through hole. In the using process, longitudinal lifting of the ball cup and transverse movement of the auxiliary chambers on the two sides are linked, so that when the cutting seam width is adjusted by lifting the height position of the focus lens, the distance between the auxiliary nozzles corresponding to the auxiliary chambers on the two sides is synchronously lengthened, and the cutting seam width is adjusted; according to the multi-head laser assembly, the two auxiliary nozzles are arranged on the two sides of the kerf, so that the distance between pre-cutting grooves formed by the two auxiliary nozzles on the two sides of the kerf is increased, the use requirement that the multi-head laser assembly adaptively adjusts the distance between the auxiliary nozzles on the two sides under the different kerf widths is met, the cutting precision under the different kerf widths is further improved, and the multi-head laser assembly is high in linkage and more convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and particularly to a high-precision laser cutting head. Background Art

[0002] Laser cutting is achieved by applying the high-power density energy generated after laser focusing. Under the control of a computer, the laser is discharged by pulses, thereby outputting a controlled repetitive high-frequency pulsed laser to form a beam with a certain frequency and a certain pulse width. This pulsed laser beam is conducted and reflected through an optical path and focused on the surface of the workpiece to be processed through a focusing lens group, forming a series of fine, high-energy density light spots. The focal spot is located near the surface to be processed, instantaneously melting or vaporizing the workpiece material at high temperature.

[0003] Since the light emitted by the laser cutting head is generally a Gaussian beam, the energy distribution of the laser beam is relatively uneven, with too high energy in the middle of the beam and the energy decreasing towards the periphery of the beam. As a result, it takes more time for the material around the beam to reach the vaporization temperature compared to the middle of the beam, leading to a larger opening at one end and a smaller opening at the other end of the cut seam cross-section. This situation is more obvious when cutting thick plates. At the same time, the cutting time for thick plates increases, and the heat generated during cutting is conducted towards the periphery of the cut seam of the plate, resulting in an increase in the cut seam. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-precision laser cutting head to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A high-precision laser cutting head includes a body and a multi-head laser assembly. The multi-head laser assemblies are mirror-symmetrically arranged on both sides of the body. The multi-head laser assembly includes a large gear disk, which is fixedly installed at the bottom end of the body. Guide rails are fixedly installed on both sides of the large gear disk in a mirror-symmetric manner. A V-shaped pin is arranged inside the through-hole of the guide rail, and one end of the V-shaped pin is rotatably connected to a connecting arm. The connecting arm is integrally fixed to the side end of the auxiliary chamber, and a refracting mirror is inclined at the top of the auxiliary chamber. An auxiliary nozzle is embedded at the bottom end of the auxiliary chamber, and the auxiliary nozzles between the two auxiliary chambers on both sides form an included angle.

[0006] Further, a main chamber is provided inside the body, and lenses communicating with the corresponding auxiliary chambers are provided on both sides of the main chamber.

[0007] Further, an optical fiber connector is connected to the top of the body, and the optical fiber connector is rotatably matched with the mounting plate through a bearing.

[0008] Further, a motor is fixedly installed on the mounting plate by bolts, and a small gear is fixedly connected to the output end of the motor. The small gear meshes with the outer teeth of the large gear disk for transmission.

[0009] Further, a spectroscope body is provided at the top end inside the main chamber. The spectroscope body includes an upper prism, a bracket, and an incident surface. The upper prism is fixed to the inner wall of the main chamber through the bracket, and the incident surface is provided on the top plane of the upper prism.

[0010] Further, the spectroscope body further includes a lower prism and a coating layer. The lower prism is provided at the bottom of the upper prism, and a coating layer is provided between the lower prism and the upper prism. The coating layer divides the incident light beam through the thin-film interference effect and reflects part of the light to both sides while the remaining light is transmitted.

[0011] Further, the spectroscope body further includes a transmission surface and a refraction surface. The transmission surface is provided on the bottom plane of the lower prism, and the refraction surfaces are provided on both sides of the lower prism. The refraction surfaces refract the reflected light through a refracting mirror to the side secondary nozzles.

[0012] Further, a linkage assembly is provided at the bottom end inside the main chamber. The linkage assembly includes an electric cylinder, a lifting plate, a ball head seat, and a focusing lens. The output end of the electric cylinder is fixedly connected to the lifting plate, and the bottom end of the lifting plate is fixedly connected to the ball head seat. A focusing lens is mounted on the top of the ball head seat.

[0013] Further, the linkage assembly further includes a ball rod and a laser beam channel. The ball rod is rotatably installed at the bottom of the ball head seat, and the laser beam channel is provided along the axial direction of the ball rod. The laser beam channel extends upward through the focusing lens and is communicated with the transmission surface.

[0014] Further, the linkage assembly further includes a connecting pin and a main nozzle. The connecting pin is fixed to the bottom of the ball rod, and the connecting pin is rotatably connected to the other end of the V-shaped pin. The main nozzle communicated with the laser beam channel is fixed to the bottom of the connecting pin.

[0015] The present invention provides a high-precision laser cutting head, having the following beneficial effects;

[0016] 1. During the use of the present invention, in this application, the longitudinal lifting of the ball head seat is linked with the lateral movement of the two side secondary chambers, so that when the height position of the focusing lens is lifted to adjust the slit width, the distance between the secondary nozzles corresponding to the two side secondary chambers is synchronously lengthened. Furthermore, the distance between the pre-cutting grooves formed by the two secondary nozzles on both sides of the slit is increased, meeting the use requirement of the multi-head laser assembly in this application to adaptively adjust the distance between the two side secondary nozzles at different slit widths, further improving the guarantee of cutting accuracy at different slit widths, and the device has strong linkage and is more convenient to use.

[0017] 2. During the use of the present invention, the laser beam enters the main chamber inside the body through the fiber optic connector, and then, after passing through the incident surface at the top of the upper prism, the incident beam is split by the thin film interference effect of the coating layer, and part of the light is reflected to the refracting surfaces on both sides of the lower prism. The reflected light is refracted by the refracting mirror through the lenses on both sides of the main chamber and led to the auxiliary nozzles on both sides, while the remaining light is transmitted to the transmission surface at the bottom of the lower prism and conducted to the main nozzle through the focusing mirror. The auxiliary nozzles of this application are mirror-symmetrically arranged at both ends of the main nozzle and form an included angle, and the laser power emitted by the two auxiliary nozzles is lower than that of the main nozzle, so that the laser emitted by the auxiliary nozzles is not sufficient to penetrate the plate. Before the main nozzle cuts the plate, the auxiliary nozzles will respectively create two grooves on the cutting trajectory, and then through secondary cutting, the generation of the cutting seam is reduced, and the cutting accuracy is improved. Through the unique design of the cube beam splitter body of this application, the splitting of the incident light by the multi-layer dielectric film forms the effect of refraction on both sides and transmission in the middle, which can realize the splitting of light inside a single cutting head and achieve multi-head cutting to improve the cutting accuracy.

[0018] 3. During the use of the present invention, the fiber optic connector at the top of the body is rotationally matched with the mounting plate through a bearing. The motor is activated and meshed with the large gear at the bottom of the body through a small gear to change the rotation angle of the auxiliary nozzles on both sides of the body. Then, the two auxiliary nozzles are used to pre-cut the plate to form two grooves parallel to the predetermined cutting trajectory of the main nozzle. The grooves will have a V-shaped structure due to the characteristics of laser cutting. The main nozzle will then perform secondary cutting on the plate, and the secondary cutting position is along the middle of the two grooves. There will be air inside the grooves generated by pre-cutting. Due to the low thermal conductivity of air, the heat generated by secondary cutting will slow down the diffusion speed towards the surroundings of the cutting position because of the air in the grooves, thereby reducing the gasification of the plate around the cutting position, reducing the cutting seam generated by cutting, and improving the smoothness of the cutting seam opening while improving the cutting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic top view structure diagram of the whole device of the present invention;

[0020] Figure 2 It is a schematic bottom view structure diagram of the whole device of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view structure diagram of the whole device of the present invention;

[0022] Figure 4 It is a schematic diagram of the multi-head laser refraction optical path of the present invention;

[0023] Figure 5 It is a schematic structure diagram of the beam splitter body of the present invention;

[0024] Figure 6 It is a schematic structure diagram of the linkage component of the present invention;

[0025] Figure 7 This is a schematic structural diagram of the multi-head laser component of the present invention.

[0026] In the figure: 1, body; 2, main chamber; 3, lens; 4, multi-head laser component; 401, large gear disk; 402, guide rail; 403, V-shaped pin; 404, connecting arm; 405, auxiliary chamber; 406, refracting mirror; 407, auxiliary nozzle; 5, fiber optic connector; 6, mounting plate; 7, motor; 8, pinion; 9, beam splitter body; 901, upper prism; 902, bracket; 903, incident surface; 904, lower prism; 905, coating layer; 906, transmission surface; 907, refracting surface; 10, linkage component; 1001, electric cylinder; 1002, lifting plate; 1003, ball head seat; 1004, focusing lens; 1005, ball rod; 1006, laser beam channel; 1007, connecting pin; 1008, main nozzle. Specific embodiments

[0027] The following further describes in detail the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] Please refer to Figures 1 to 7 , the present invention provides a technical solution: a high-precision laser cutting head, including a body 1 and a multi-head laser component 4. The multi-head laser components 4 are arranged mirror-symmetrically on both sides of the body 1. A main chamber 2 is provided inside the body 1, and lenses 3 communicating with the corresponding auxiliary chambers 405 are provided on both sides of the main chamber 2. The multi-head laser component 4 includes a large gear disk 401, which is fixedly installed at the bottom end of the body 1. Guide rails 402 are fixedly installed mirror-symmetrically on both sides of the disk surface of the large gear disk 401. A V-shaped pin 403 is arranged inside the through hole of the guide rail 402, and one end of the V-shaped pin 403 is rotatably connected to a connecting arm 404. The connecting arm 404 is integrally fixed to the side end of the auxiliary chamber 405. A refracting mirror 406 is inclined at the top end of the auxiliary chamber 405. An auxiliary nozzle 407 is embedded at the bottom end of the auxiliary chamber 405, and the auxiliary nozzles 407 between the two auxiliary chambers 405 on both sides form an included angle.

[0029] The specific operation is as follows. The optical fiber connector 5 at the top of the machine body 1 is rotationally matched with the mounting plate 6 through a bearing. The motor 7 is enabled and meshed with the large gear disk 401 at the bottom of the machine body 1 through the small gear 8 to change the rotation angles of the auxiliary nozzles 407 on both sides of the machine body 1. Then, the two auxiliary nozzles 407 are used to pre-cut the plate to form two grooves parallel to the predetermined cutting trajectory of the main nozzle 1008. The grooves will have a V-shaped structure due to the characteristics of laser cutting. The main nozzle 1008 will then perform secondary cutting on the plate. The secondary cutting position is along the two grooves. There will be air inside the grooves generated by the pre-cutting. Since the thermal conductivity of air is low, the heat generated by the secondary cutting will be slowed down in its diffusion speed around the cutting position due to the air in the grooves, thereby reducing the gasification of the plate around the cutting position. While reducing the cutting seam generated by the cutting, it can improve the smoothness of the opening of the cutting seam and improve the cutting accuracy;

[0030] Please refer to Figures 4 to 5 , the optical fiber connector 5 is connected to the top of the machine body 1, and the optical fiber connector 5 is rotationally matched with the mounting plate 6 through a bearing. The motor 7 is bolted to the mounting plate 6, and the output end of the motor 7 is fixedly connected with the small gear 8. The small gear 8 is meshed and driven with the outer edge teeth of the large gear disk 401. A beam splitter body 9 is arranged at the top end inside the main chamber 2. The beam splitter body 9 includes an upper prism 901, a bracket 902, and an incident surface 903. The upper prism 901 is fixed to the inner wall of the main chamber 2 through the bracket 902, and the incident surface 903 is arranged on the top plane of the upper prism 901. The beam splitter body 9 further includes a lower prism 904 and a coating layer 905. The lower prism 904 is arranged at the bottom of the upper prism 901, and the coating layer 905 is arranged between the lower prism 904 and the upper prism 901. The coating layer 905 divides the incident light beam through the thin film interference effect and reflects part of the light to both sides while the remaining light is transmitted. The beam splitter body 9 further includes a transmission surface 906 and a refraction surface 907. The transmission surface 906 is arranged on the bottom plane of the lower prism 904, and the refraction surfaces 907 are arranged on both sides of the lower prism 904. The refraction surfaces 907 refract the reflected light to the two auxiliary nozzles 407 through the refracting mirror 406;

[0031] The specific operation is as follows. The laser beam enters the main chamber 2 inside the body 1 through the fiber optic connector 5, and then, after passing through the incident surface 903 at the top of the upper prism 901, the incident beam is split by the thin film interference effect of the coating layer 905 and part of the light is reflected to the refracting surfaces 907 on both sides of the lower prism 904. The reflected light is refracted by the lens 3 on both sides of the main chamber 2 through the refracting mirror 406 to the auxiliary nozzles 407 on both sides, while the remaining light is transmitted to the transmission surface 906 at the bottom of the lower prism 904 and is conducted to the main nozzle 1008 through the focusing mirror 1004. The auxiliary nozzles 407 of the present application are mirror - symmetrically arranged at both ends of the main nozzle 1008 and form an included angle, and the laser power emitted by the auxiliary nozzles 407 on both sides is lower than that of the main nozzle 1008, so that the laser emitted by the auxiliary nozzles 407 is not sufficient to penetrate the plate. Before the main nozzle 1008 cuts the plate, the auxiliary nozzles 407 will respectively open two grooves on the cutting track, and then reduce the generation of the cutting seam through secondary cutting, improving the cutting accuracy. Through the unique design of the cube beam splitter body 9 of the present application, the splitting of the incident light by the multi - layer dielectric film forms the effect of refraction on both sides and transmission in the middle, which can realize the beam splitting inside a single cutting head and achieve multi - head cutting to improve the cutting accuracy;

[0032] Please refer to Figures 3 to 6 , a linkage assembly 10 is provided at the bottom end inside the main chamber 2. The linkage assembly 10 includes an electric cylinder 1001, a lifting plate 1002, a ball head seat 1003 and a focusing mirror 1004. The output end of the electric cylinder 1001 is fixedly connected to the lifting plate 1002, and the bottom of the end of the lifting plate 1002 is fixedly connected to the ball head seat 1003, and a focusing mirror 1004 is mounted on the top of the ball head seat 1003. The linkage assembly 10 further includes a ball rod 1005 and a laser beam channel 1006. The ball head seat 1003 is rotatably installed with the ball rod 1005 at the bottom, and the laser beam channel 1006 is provided along the axial direction of the ball rod 1005, and the laser beam channel 1006 extends upward through the focusing mirror 1004 and is conducted to the transmission surface 906. The linkage assembly 10 further includes a connecting pin 1007 and a main nozzle 1008. The ball rod 1005 is fixed with the connecting pin 1007 at the bottom, and the connecting pin 1007 is rotatably connected to the other end of the V - shaped pin 403, and the main nozzle 1008 which is conducted to the laser beam channel 1006 is fixed at the bottom of the connecting pin 1007;

[0033] The specific operation is as follows: Activate the electric cylinder 1001 and drive the ball head seat 1003 to lift through the lifting plate 1002. Then, adjust the height position of the focusing lens 1004 of the main nozzle 1008 in the direction away from the material surface to expand the laser spot diameter and increase the cutting seam width. At this time, the connecting pin 1007 fixedly connected to the bottom of the ball head rod drives the two connecting arms 404 through the V-shaped pin 403, and then moves the two side auxiliary chambers 405 in the direction away from the machine body 1. In this application, the longitudinal lifting of the ball head seat 1003 is linked with the lateral movement of the two side auxiliary chambers 405, so that when the cutting seam width is adjusted by lifting the height position of the focusing lens 1004, the distance between the auxiliary nozzles 407 corresponding to the two side auxiliary chambers 405 is synchronously lengthened. Furthermore, the distance between the pre-cutting grooves formed by the two auxiliary nozzles 407 on both sides of the cutting seam is increased, meeting the use requirement of the multi-head laser assembly 4 in this application to adaptively adjust the distance between the two side auxiliary nozzles 407 at different cutting seam widths, further improving the guarantee of cutting accuracy at different cutting seam widths, and the device has strong linkage and is more convenient to use.

[0034] In summary, when using this high-precision laser cutting head:

[0035] First, the laser beam enters the main chamber 2 inside the machine body 1 through the optical fiber connector 5. Then, after passing through the incident surface 903 at the top of the upper prism 901, the incident light beam is split by the thin film interference effect of the coating layer 905, and part of the light is reflected to the refraction surfaces 907 on both sides of the lower prism 904. The reflected light is refracted by the two side lenses 3 in the main chamber 2 through the refractive mirror 406 to the two side auxiliary nozzles 407, while the remaining light is transmitted to the transmission surface 906 at the bottom of the lower prism 904 and is conducted to the main nozzle 1008 through the focusing lens 1004. The auxiliary nozzles 407 in this application are mirror-symmetrically arranged at both ends of the main nozzle 1008 and form an included angle, and the laser power emitted by the two side auxiliary nozzles 407 is lower than that of the main nozzle 1008, so that the laser emitted by the auxiliary nozzles 407 is not sufficient to penetrate the plate. Before the main nozzle 1008 cuts the plate, the auxiliary nozzles 407 will respectively open two grooves on the cutting track, and then reduce the generation of cutting seams through secondary cutting, improving the cutting accuracy. Through the unique design of the cube beam splitter body 9 in this application, the incident light is split by the multi-layer dielectric film to form the effect of refraction on both sides and transmission in the middle, which can realize beam splitting inside a single cutting head and achieve multi-head cutting to improve the cutting accuracy;

[0036] Secondly, the optical fiber connector 5 at the top of the body 1 is rotationally matched with the mounting plate 6 through a bearing. The motor 7 is enabled and meshed with the large gear disk 401 at the bottom of the body 1 through the small gear 8 to change the rotation angle of the auxiliary nozzles 407 on both sides of the body 1. Then, the two auxiliary nozzles 407 are used to pre-cut the plate to form two grooves parallel to the predetermined cutting trajectory of the main nozzle 1008. The grooves will be in a V-shaped structure due to the characteristics of laser cutting. The main nozzle 1008 will then perform secondary cutting on the plate. The secondary cutting position is along the two grooves. There will be air inside the grooves generated by the pre-cutting. Since the thermal conductivity of air is low, the heat generated by the secondary cutting will be slowed down in its diffusion speed around the cutting position due to the air in the grooves, thereby reducing the gasification of the plate around the cutting position, reducing the cut seam generated by the cutting, and improving the smoothness of the opening of the cut seam while improving the cutting accuracy.

[0037] Finally, the electric cylinder 1001 is enabled and the lifting plate 1002 is used to drive the ball head seat 1003 to lift. Then, the height position of the focusing lens 1004 of the main nozzle 1008 is adjusted in the direction away from the material surface to expand the diameter of the laser spot and increase the cut seam width. At this time, the connecting pin 1007 fixedly connected to the bottom of the ball head rod is transmitted to the two side connecting arms 404 through the V-shaped pin 403, and then the two side auxiliary chambers 405 move in the direction away from the body 1. In this application, the longitudinal lifting of the ball head seat 1003 is linked with the lateral movement of the two side auxiliary chambers 405, so that when the cut seam width is adjusted by lifting the height position of the focusing lens 1004, the distance between the auxiliary nozzles 407 corresponding to the two side auxiliary chambers 405 is synchronously lengthened, and then the distance between the pre-cut grooves formed by the two auxiliary nozzles 407 on both sides of the cut seam is increased, meeting the use requirement of the multi-head laser assembly 4 in this application for adaptively adjusting the distance between the two side auxiliary nozzles 407 at different cut seam widths, further improving the guarantee of cutting accuracy at different cut seam widths, and having strong linkage between devices and being more convenient to use.

[0038] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0039] In this article, specific examples are used to elaborate on the principles and implementation modes of the present invention. The description of the above examples is only for helping to understand the method and its core idea of the present invention. The above description is only the preferred implementation mode of the present invention. It should be noted that due to the limited nature of literal expression and objectively existing infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements, retouches or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, retouches, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present invention.

Claims

1. A high-precision laser cutting head, comprising a body (1) and a multi-head laser assembly (4), characterized in that: A multi-head laser assembly (4) is arranged in a mirror image on both sides of the machine body (1), and the multi-head laser assembly (4) comprises a large toothed disc (401), the large toothed disc (401) is fixedly mounted on the bottom end of the machine body (1), and guide rails (402) are fixed in a mirror image on both sides of the disc surface of the large toothed disc (401), a V-shaped pin (403) is arranged inside the through hole of the guide rail (402), and one end of the V-shaped pin (403) is rotatably connected to a connecting arm (404), the connecting arm (404) is integrally fixed to the side end of the auxiliary chamber (405), and a refraction mirror (406) is obliquely arranged on the top end of the auxiliary chamber (405), a secondary nozzle (407) is embedded in the bottom end of the auxiliary chamber (405), and the secondary nozzles (407) between the auxiliary chambers (405) on both sides are in an angled shape.

2. A high-precision laser cutting head according to claim 1, characterized in that: A main chamber (2) is provided inside the machine body (1), and lenses (3) communicating with corresponding sub-chambers (405) are provided on both sides of the main chamber (2).

3. A high-precision laser cutting head according to claim 2, characterized in that: The top of the machine body (1) is connected with an optical fiber connector (5), and the optical fiber connector (5) is rotatably matched with the mounting plate (6) via a bearing.

4. A high-precision laser cutting head according to claim 3, characterized in that: A motor (7) is bolted onto the mounting plate (6), and a pinion (8) is fixedly connected to the output end of the motor (7), and the pinion (8) is meshed with the outer edge teeth of the large toothed disc (401) for transmission.

5. A high-precision laser cutting head according to claim 4, characterized in that: A beam splitter body (9) is arranged at the top of the main chamber (2), and the beam splitter body (9) comprises an upper prism (901), a bracket (902) and an incident surface (903). The upper prism (901) is fixed to the inner wall of the main chamber (2) via the bracket (902), and the incident surface (903) is arranged on the top plane of the upper prism (901).

6. A high-precision laser cutting head according to claim 5, characterized in that: The beam splitter body (9) further comprises a lower prism (904) and a coating layer (905); the lower prism (904) is provided at the bottom of the upper prism (901); a coating layer (905) is provided between the lower prism (904) and the upper prism (901); and the coating layer (905) splits the incident light beam through the thin film interference effect and reflects part of the light to both sides while the remaining light is transmitted.

7. A high-precision laser cutting head according to claim 6, characterized in that: The beam splitter body (9) further comprises a transmission surface (906) and a refractive surface (907); the bottom plane of the lower prism (904) is provided with a transmission surface (906), and refractive surfaces (907) are provided on both sides of the lower prism (904); and the refractive surfaces (907) refract the reflected light through the refractor (406) to the auxiliary nozzles (407) on both sides.

8. A high-precision laser cutting head according to claim 7, characterized in that: A linkage assembly (10) is arranged at the bottom end of the main chamber (2), and the linkage assembly (10) comprises an electric cylinder (1001), a lifting plate (1002), a ball head seat (1003) and a focusing mirror (1004); the output end of the electric cylinder (1001) is fixedly connected to the lifting plate (1002), the bottom end of the lifting plate (1002) is fixedly connected to the ball head seat (1003), and the focusing mirror (1004) is mounted on the top of the ball head seat (1003).

9. A high-precision laser cutting head according to claim 8, characterized in that: The linkage assembly (10) further comprises a ball rod (1005) and a laser beam channel (1006); the ball rod (1005) is rotatably mounted on the bottom of the ball head seat (1003); the ball rod (1005) is provided with a laser beam channel (1006) along the axial direction; and the laser beam channel (1006) extends upward through the focusing mirror (1004) and is in communication with the transmission surface (906).

10. A high-precision laser cutting head according to claim 9, characterized in that: The linkage assembly (10) further comprises a connecting pin (1007) and a main nozzle (1008); the connecting pin (1007) is fixed to the bottom of the ball rod (1005), and the connecting pin (1007) is rotatably connected to the other end of the V-shaped pin (403); and the main nozzle (1008) which is in communication with the laser beam channel (1006) is fixed to the bottom of the connecting pin (1007).

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