Ultrahigh-power laser welding head
By using a combination of curved copper mirror and water-cooling components in the laser welding head, the heat dissipation and contamination protection problems of high-power laser welding heads are solved, achieving more efficient heat dissipation and more stable beam output, and extending the service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-09
- Publication Date
- 2026-03-24
AI Technical Summary
In existing high-power laser welding heads, metal reflectors lack effective and reliable contamination protection, and glass transmission lenses have insufficient heat dissipation performance. As a result, the welding head is susceptible to contamination and thermal lensing effects at high power, which affects beam quality and service life.
A curved copper mirror is used to refract the light beam, and a water-cooling component is used for contact cooling. A protective component and a side-blowing air knife form a double protection to isolate external harmful light feedback and prevent damage from contaminants. Uniform heat dissipation is achieved through the design of a ring pipe and an arc-shaped guide plate.
It improves the heat dissipation efficiency and stability of the laser welding head, prevents damage from contaminants, extends its service life, and enhances the welding head's ability to work in harsh environments.
Smart Images
Figure CN121715693A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of laser welding heads, in particular to an ultrahigh-power laser welding head. BACKGROUND
[0002] As the key functional component for transmitting and focusing the laser beam to the workpiece surface, the performance and reliability of the internal optical elements of the laser welding head directly determine the output capacity, stability and service life of the entire laser processing system. With the increasing demand for processing efficiency and thickness in industrial manufacturing, laser welding is rapidly developing towards higher power and higher brightness. Under this background, the internal optical elements of the welding head, especially the mirrors and lenses used for beam turning, focusing or expanding, bear a sharp increase in thermal load. The commonly used optical elements in high-power laser welding heads mainly have the problems of insufficient heat dissipation capacity of glass transmission lenses and low thermal conductivity of focusing lenses made of optical glass such as fused quartz. Under high-power laser irradiation, the temperature in the central region of the lens rises significantly, causing serious thermal lens effect, leading to beam quality degradation and focal point drift. The traditional peripheral water cooling method cannot effectively cool the core heating area due to the poor thermal conductivity of glass, which becomes a key bottleneck limiting the power improvement. In addition, the optical working surface is easily contaminated by splashes, smoke and oxidation in the complex welding environment. The contaminants can sharply increase the laser absorption rate, causing the lens to burn out. Therefore, the optical system of the current high-power laser welding head faces a fundamental contradiction, i.e., the metal mirror with excellent heat dissipation performance lacks reliable contamination protection, and the glass transmission lens with contamination isolation capability has a heat dissipation short board. This contradiction restricts the further improvement of the power and reliability of the welding head.
[0003] Based on the above technical problems, the present application aims to provide an innovative optical element and packaging structure to simultaneously solve the problems of efficient heat dissipation and absolute contamination protection. SUMMARY
[0004] Technical problems to be solved
[0005] In view of the deficiencies in the prior art, the present application provides an ultrahigh-power laser welding head, which solves the problem that the metal mirror with high thermal conductivity lacks effective and reliable contamination protection mechanism and is easily contaminated, and the traditional glass transmission lens becomes a heat dissipation short board due to low thermal conductivity and cannot perform higher power operation.
[0006] Technical scheme To achieve the above purpose, the present application provides the following technical scheme: an ultrahigh-power laser welding head, comprising a mechanical arm, a connecting frame, a side blowing knife, a feather ash blowing device, a protective gas pipe, a shell and a laser generator fixed on the shell, further comprising: A mirror barrel is mounted in the shell, the side wall of the mirror barrel is provided with a light beam inlet connected with a laser generator, the side wall of the mirror barrel is provided with a light beam outlet, and the two ends of the mirror barrel are provided with mounting seats; Two curved copper mirrors are arranged in the mounting seats at the two ends of the mirror barrel and are obliquely mounted, one of the curved copper mirrors is located below the light beam inlet, and the other curved copper mirror is located above the light beam outlet, and the harmful external light feedback is isolated by means of the right-angle refraction between the two curved copper mirrors, so that the laser generator is protected; A water cooling assembly is integrally mounted in the mounting seat in the mirror barrel together with the curved copper mirror, the water cooling assembly can contact the curved copper mirror for water cooling, the cooling water flows uniformly, the curved copper mirror is uniformly cooled, and the change of the focal point of the welding joint caused by temperature rise is avoided; A protection assembly is mounted at the port of the light beam outlet through the mounting seat, the side wall of the shell is fixedly connected with the mounting seat through the assembly port, the glass sheet mounted in the protection assembly is used for sealing the light beam outlet, so that the curved copper mirror is protected from being damaged by welding splashes.
[0007] As a further description of the above technical scheme, one end of the two mounting seats on the mirror barrel is provided with a fixed part, the fixed part is fixedly connected with one end of the mirror barrel through a bolt, the other end of the mounting seat is provided with a 45°-angle mounting part, the center point of the mounting part on one of the mounting seats is located on the center line of the light beam outlet, the center point of the mounting part on the other mounting seat is located on the center line of the light beam inlet, one side of the mounting seat is connected with an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe are used for connecting the water cooling assembly to realize the circulating flow of the cooling water, and a temperature sensor for monitoring the curved copper mirror is mounted on the side wall of the mirror barrel.
[0008] As a further description of the above technical scheme, the water cooling assembly comprises a ring-shaped pipeline, one end of the ring-shaped pipeline is fixedly connected with a sealing plate, the other side of the ring-shaped pipeline is in contact with one side of the curved copper mirror, a circular opening matched with the ring-shaped pipeline is formed in the mounting part of the mounting seat, a plurality of positioning clamping blocks are fixedly connected on one side of the mounting part, the ring-shaped pipeline is clamped in the plurality of positioning clamping blocks, a clamping groove is arranged at the circular opening, the curved copper mirror is clamped in the clamping groove, a fixing ring is fixedly connected on one side of the mounting part through a bolt, the fixing ring is used for pressing the curved copper mirror and the ring-shaped pipeline, so that the sealing plate, the curved copper mirror and the ring-shaped pipeline are sealed to form a water cooling chamber; The side wall of the annular pipeline is provided with a plurality of water distribution holes in annular distribution, the center of the sealing plate is provided with a drainage hole, one end of the water outlet pipe is connected with a flow guide cover, the flow guide cover is fixed on one side of the sealing plate for guiding the cooling water in the drainage hole, one side of the annular pipeline is fixedly connected with a water inlet joint, and the water inlet joint is fixedly connected with one end of the water inlet pipe.
[0009] As further description of the above technical scheme, the side wall of the annular pipeline is fixedly connected with a plurality of arc-shaped flow guide plates, the arc-shaped flow guide plates are grouped two by two and fixed at the openings of the water distribution holes, and under the action of water pressure, the curved surface structure of the arc-shaped flow guide plates makes the cooling water form a rotational flow, so that flow dead angles in the water-cooled chamber are avoided.
[0010] As further description of the above technical scheme, the annular pipeline is provided with a water distribution ring, the side wall of the water distribution ring is provided with a plurality of water distribution channels, the cooling water discharged by the water inlet joint is shunted through the plurality of water distribution channels on the water distribution ring, and the drainage speed in the plurality of water distribution holes is adjusted.
[0011] As further description of the above technical scheme, the drainage hole is fixedly connected with a drainage cover, the side wall of the drainage cover is provided with a plurality of drainage channels, one end of the drainage cover is a sealing structure, the other end of the drainage cover is fixedly connected with a baffle, the side wall of the baffle is provided with a plurality of flow limiting holes, and an inclined flow guide body is arranged at each of the flow limiting holes, so that the discharged cooling water can form a rotational flow and be discharged.
[0012] As further description of the above technical scheme, the edge of the fixing ring is provided with a positioning groove, the edge of the fixing ring and the positioning groove are both connected with a sealing rubber ring, the curved copper mirror is clamped in the positioning groove, the lower end of the annular pipeline is provided with a sealing rubber ring, one side of the curved copper mirror is provided with an annular groove matched with the sealing rubber ring, and the sealing rubber ring is used for sealing between the curved copper mirror and the annular pipeline to avoid leakage of cooling water.
[0013] As further description of the above technical scheme, the side wall of the shell is provided with a water inlet connector and a backwater connector, the water inlet connector is threadedly connected with the pipe opening of the water inlet pipe through the side wall of the shell, and the backwater connector is threadedly connected with one end of the water outlet pipe through the side wall of the shell.
[0014] As further description of the above technical scheme, the protection assembly comprises a circular ring, the circular ring is provided with an annular channel, the annular channel is fixedly connected with a separation plate, one side of the circular ring is fixedly connected with two circulating water connectors, one of the circulating water connectors is connected with a cooling water inlet pipeline, the other circulating water connector is connected with a cooling water return pipeline, the glass sheet is fixed in the circular ring, the upper end of the circular ring is fixedly connected with the lower end of the mounting seat, and the side blowing knife is mounted at the lower end of the circular ring.
[0015] As a further description of the above technical solution, the connecting frame is installed at the end of the robotic arm, the housing is installed on one side of the connecting frame, the feather blowing device is installed on one side of the connecting frame via a bracket, and the protective air pipe is installed on one side of the connecting frame via an adjusting support.
[0016] Beneficial effects Compared with the prior art, the present invention provides an ultra-high power laser welding head, which has the following beneficial effects: 1. This invention utilizes a certain amount of cooling water stored in a water-cooling chamber to prevent the cooling water from impacting the copper mirror and causing vibration. Multiple water distribution holes on a ring-shaped pipe can divide the water flow into multiple streams for discharge, and the discharge airflow is parallel to the curved copper mirror. The parallel water distribution method does not impact the curved copper mirror, effectively ensuring the stability of the curved copper mirror. Furthermore, the ring-shaped water distribution method can effectively improve the heat exchange uniformity, allowing the cooling water to flow evenly over the back of the curved copper mirror, thereby achieving efficient contact heat dissipation.
[0017] 2. This technical solution employs physical isolation and strong airflow to physically isolate the curved copper mirror installed at the final stage. This creates a high-speed airflow curtain in front of the protective components, blowing away most of the spatter and preventing irreversible damage to the protective glass and curved copper mirror. The welding ash blowing device directly blows away most of the plasma, welding fumes, and small spatters from the optical path area during welding. This is the first layer of protection, which, together with the double-layered side-blowing air knife, forms a double protection system to ensure the laser welding head can work efficiently in harsh environments. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall assembly structure of an ultra-high power laser welding head proposed in this invention; Figure 2 This is a schematic diagram of the structure of the laser generator, housing, lens barrel, ring, and side-blowing air knife in an ultra-high power laser welding head proposed in this invention; Figure 3 This is a schematic diagram of the internal structure of the lens barrel in an ultra-high power laser welding head proposed in this invention; Figure 4 This is a schematic diagram of the mounting base, water-cooling assembly, and curved copper mirror in an ultra-high power laser welding head proposed in this invention. Figure 5 This is an exploded view of the mounting base, water-cooling assembly, and curved copper mirror in an ultra-high power laser welding head proposed in this invention. Figure 6 This is a cross-sectional view of a water-cooling component in an ultra-high power laser welding head proposed in this invention; Figure 7This is a schematic diagram of the ring structure in an ultra-high power laser welding head proposed in this invention; Figure 8 This is a cross-sectional view of the annular component in an ultra-high power laser welding head proposed in this invention.
[0019] In the diagram: 1. Housing; 2. Laser generator; 3. Connecting frame; 4. Robotic arm; 5. Feather blowing device; 6. Side-blowing air knife; 7. Protective air tube; 8. Beam inlet; 9. Lens tube; 10. Temperature sensor; 11. Beam outlet; 12. Ring; 13. Annular channel; 14. Water inlet pipe; 15. Water outlet pipe; 16. Flow guide; 17. Sealing plate; 18. Positioning block; 19. Annular pipe; 20. Curved copper mirror; 21. Mounting base; 22. Glass plate; 23. Isolation plate; 24. Fixing ring; 25. Positioning groove; 26. Sealing rubber ring; 27. Water inlet connector; 28. Baffle; 29. Flow guide; 30. Drainage channel; 31. Flow guide; 32. Arc-shaped flow guide plate; 33. Water distribution ring; 34. Water distribution hole. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Example: See attached document Figures 1-8 This invention provides an ultra-high power laser welding head, such as... Figure 1 The installation diagram shown indicates that the main body of this device includes a robotic arm 4, a connecting frame 3, a side-blowing air knife 6, a feather removal device 5, a protective air pipe 7, a housing 1, and a laser generator 2 fixed on the housing 1. The connecting frame 3 is installed at the end of the robotic arm 4, the housing 1 is installed on one side of the connecting frame 3, the feather removal device 5 is installed on one side of the connecting frame 3 via a bracket, and the protective air pipe 7 is installed on one side of the connecting frame 3 via an adjusting support. Through this structural design, the laser welding head can be driven by the robotic arm to perform laser welding operations at a set depth. The side-blowing air knife 6 uses a double-layer side-blowing air knife (compressed air at 8 to 10 kg pressure), forming a high-speed air curtain in front of the protective components. When spatter passes by, most of it is blown away, preventing irreversible damage to the protective glass and curved copper mirror 20. The welding feather removal device 5 directly blows most of the plasma, welding fumes, and small spatter away from the optical path area during welding. Figure 1The dotted line represents the laser beam. This is the first layer of protection, which, together with the double-layered side-blowing air knife 6, forms a double protection system to ensure that the laser welding head can work efficiently in harsh environments.
[0022] Because existing glass lenses can only be indirectly water-cooled, their temperature gradually increases during continuous transmission of high-power lasers. This causes the curvature of the traditional glass lens to change with increasing temperature, directly leading to a change in the focal point of the welding joint. Therefore, this technical solution uses a water-cooled curved copper mirror 20 to replace the traditional glass focusing lens, which can significantly improve the stability of the focal length. The specific technical solution is as follows: A curved copper mirror is installed inside a mirror tube 9, which is installed inside a housing 1. The side wall of the mirror tube 9 is provided with a beam inlet 8 for connecting to a laser generator 2, and a beam outlet 11. Mounting seats 21 are provided at both ends of the mirror tube 9. One end of each mounting seat 21 on the mirror tube 9 is provided with a fixing part, which is fixedly connected to one end of the mirror tube 9 by bolts. The other end of the mounting seat 21 is provided with a mounting part at a 45° angle. The center point of the mounting part on one mounting seat 21 is located on the center line of the beam outlet 11, and the center point of the mounting part on the other mounting seat 21 is located on the center line of the beam inlet 8. A water inlet pipe 14 and a water outlet pipe 15 are connected to one side of the mounting seat 21. The water inlet pipe 14 and the water outlet pipe 15 are used to connect to a water cooling component to realize the circulation of cooling water. A temperature sensor 10 for monitoring the curved copper mirror 20 is installed on the side wall of the mirror tube 9. Two curved copper mirrors 20 are provided and obliquely installed in the mounting seats 21 at both ends of the mirror tube 9. One curved copper mirror 20 is located below the beam inlet 8, and the other curved copper mirror 20 is located above the beam outlet 11, as shown. Figure 3 As shown, the curved copper mirrors 20 are both tilted at 45°. Therefore, the two curved copper mirrors 20 can directly refract the laser beam, allowing the laser beam from the laser generator 2 to exit from the beam outlet 11. Furthermore, the right-angle refraction between the two curved copper mirrors 20 isolates harmful external light feedback, protecting the laser. In addition, to protect the curved copper mirrors 20, this technical solution also includes a protective component. This component uses physical isolation to directly isolate external dust, as detailed below: The protective component is installed at the port of the beam outlet 11 via the mounting base 21. The side wall of the housing 1 is fixedly connected to the mounting base 21 via the assembly port. The glass plate 22 installed inside the protective component is used to seal the beam outlet 11, thereby protecting the curved copper mirror 20 from damage by welding spatter. Because the laser uses ultra-high power, the temperature of the glass plate 22 will rise during prolonged operation. Therefore, the protection component needs to be designed with a cooling function. The specific technical solution is to use a ring 12 with an annular channel 13. An isolation plate 23 is fixedly connected inside the annular channel 13. The isolation plate 23 can physically isolate the originally conductive annular channel 13, forming a partition. Two circulating water connectors are fixedly connected to one side of the ring 12, one of which is connected to the cooling water inlet pipe 14. Another circulating water connector is connected to the cooling water return pipe. At this time, circulating cooling water can be introduced into the ring 12 to reduce the temperature of the ring 12, thereby indirectly completing the heat exchange with the glass plate 22 and reducing the temperature of the glass plate 22. The glass plate 22 is fixed inside the ring 12, and the upper end of the ring 12 is fixedly connected to the lower end of the mounting base 21. The side-blowing air knife 6 is installed at the lower end of the ring 12, which can make the high-speed airflow blown out laterally form an air curtain, effectively isolating most of the dust and splashes and preventing splashes from damaging the glass plate 22.
[0023] As a water-cooling component for cooling the curved copper mirror 20 in this technical solution, such as Figures 4-8 As shown, the water-cooling component and the curved copper mirror 20 are integrated in the mounting base 21 inside the mirror barrel 9. The water-cooling component can use circulating cold water to perform contact water cooling on the curved copper mirror 20, and the uniform flow of cooling water can uniformly cool the curved copper mirror 20, avoiding changes in the focus of the welding joint due to temperature rise. In this technical solution, the water-cooling assembly includes an annular pipe 19, one end of which is fixedly connected to a sealing plate 17, and the other side of the annular pipe 19 contacts one side of the curved copper mirror 20. The mounting part of the mounting base 21 has a round opening that matches the annular pipe 19. One side of the mounting part is fixedly connected to multiple positioning blocks 18, and the annular pipe 19 is snapped into the multiple positioning blocks 18. A slot is provided at the round opening, and the curved copper mirror 20 is snapped into the slot. One side of the mounting part is fixedly connected to a fixing ring 24 by bolts. The fixing ring 24 presses the curved copper mirror 20 and the annular pipe 19 together, so that the sealing plate 17 and the curved copper mirror 20 together with the annular pipe 19 form a water-cooling chamber for sealing. The annular pipe 19 has multiple water distribution holes 34 arranged in a ring on its side wall. A drain hole is provided at the center of the sealing plate 17. One end of the water outlet pipe 15 is connected to the flow guide shroud 16. The flow guide shroud 16 is fixed to one side of the sealing plate 17 to discharge the cooling water in the drain hole. A water inlet connector 27 is fixedly connected to one side of the annular pipe 19. The water inlet connector 27 is fixedly connected to one end of the water inlet pipe 14.
[0024] By utilizing a water-cooling chamber, a certain amount of cooling water can be stored, preventing the cooling water from impacting the copper mirror and causing vibration. In addition, this technical solution uses multiple water distribution holes 34 on the annular pipe 19 to divide the water flow into multiple streams for discharge, and the discharge air direction is parallel to the curved copper mirror 20. The parallel water distribution method will not impact the curved copper mirror 20, effectively ensuring the stability of the curved copper mirror 20. Furthermore, the annular water distribution method can effectively improve the heat exchange uniformity, allowing the cooling water to flow evenly over the back of the curved copper mirror 20, thereby achieving efficient contact heat dissipation.
[0025] To further improve the uniformity of water distribution, multiple arc-shaped guide plates 32 are fixedly connected to the side wall of the annular pipe 19. These guide plates 32 are grouped in pairs and fixed at the openings of the water distribution holes 34. Under water pressure, the curved surface structure of the arc-shaped guide plates 32 causes the cooling water to form a swirling flow, preventing dead zones in the water-cooled chamber. Furthermore, a water distribution ring 33 is also installed inside the annular pipe 19. The side wall of the water distribution ring 33 has multiple water distribution channels. These channels distribute the cooling water discharged from the inlet connector 27, regulating the drainage speed in the multiple water distribution holes 34. Figure 6 and Figure 8 As shown, the water distribution ring 33 and the water distribution hole 34 work together to buffer the incoming water speed under the action of the cooling water distribution channel entering at the water inlet connector 27, reduce the velocity difference in multiple water distribution channels, and then discharge through multiple water distribution holes 34 to further reduce the velocity difference, so that the water flow velocity is balanced and a stable swirling field is formed.
[0026] In addition, a corresponding design was made at the drainage end. A flow guide shroud 31 was fixedly installed inside the drainage hole. The side wall of the flow guide shroud 31 had multiple drainage channels 30. One end of the flow guide shroud 31 was a sealed structure, and the other end of the flow guide shroud 31 was fixedly connected to a baffle 28. The side wall of the baffle 28 had multiple flow limiting holes, and each of the multiple flow limiting holes had an inclined guide fluid 29, so that the discharged cooling water could form a swirling flow and be discharged. Figure 6 As shown, the design of the guide fluid 29 allows the water to be discharged at an angle instead of directly. This design can meet the swirling flow field of the water-cooled chamber, which helps to maintain the swirling flow speed and slow down the discharge speed of the cooling water. This can increase the heat exchange time between the cooling water and the curved copper mirror 20 and improve the heat dissipation efficiency.
[0027] Since the curved copper mirror 20 and the annular pipe 9 are separate designs, corresponding sealing treatment is required at the connection point. Specifically, a positioning groove 25 is provided at the edge of the fixing ring 24, and sealing rubber rings 26 are connected to the edges of both the positioning groove 25 and the fixing ring 24. The sealing rubber rings 26 mainly seal the installation connection between the curved copper mirror 20 and the annular pipe 9. Secondly, the curved copper mirror 20 is snapped into the positioning groove 25, and a sealing rubber ring is provided at the lower end of the annular pipe 19. An annular groove that matches the sealing rubber ring is opened on one side of the curved copper mirror 20. The sealing rubber ring is used to seal between the curved copper mirror 20 and the annular pipe 19 to prevent leakage of cooling water. During assembly, glue can be applied to both sides of the sealing rubber ring to prevent leakage. The separate design is mainly used so that when the curved copper mirror 20 is disassembled and replaced later, the water cooling component does not need to be replaced. Moreover, it is not limited to this. A direct sealing welding method can also be used to achieve a permanent seal. When the curved copper mirror 20 needs to be replaced, the water cooling component can be replaced together.
[0028] The side wall of the housing 1 is provided with an inlet connector and a return connector. The inlet connector passes through the side wall of the housing 1 and is threaded to the inlet of the inlet pipe 14. The return connector passes through the side wall of the housing 1 and is threaded to one end of the outlet pipe 15.
[0029] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An ultra-high power laser welding head, comprising a robotic arm (4), a connecting frame (3), a side-blowing air knife (6), a feather blowing device (5), a protective air tube (7), a housing (1), and a laser generator (2) fixed on the housing (1), characterized in that, Also includes: The mirror tube (9) is installed inside the housing (1). The side wall of the mirror tube (9) is provided with a beam inlet (8) for connecting the laser generator (2). The side wall of the mirror tube (9) is provided with a beam outlet (11). Both ends of the mirror tube (9) are provided with mounting bases (21). Curved copper mirror (20), two curved copper mirrors (20) are provided and installed obliquely in the mounting bases (21) at both ends of the mirror tube (9). One curved copper mirror (20) is located below the beam inlet (8) and the other curved copper mirror (20) is located above the beam outlet (11). The right angle refraction between the two curved copper mirrors (20) is used to isolate external harmful light feedback and protect the laser. The water-cooling component is integrated with the curved copper mirror (20) and installed in the mounting base (21) inside the mirror tube (9). The water-cooling component can perform contact water cooling on the curved copper mirror (20) through circulating cold water. The uniform flow of cooling water can uniformly cool the curved copper mirror (20) and avoid changes in the focus of the welding head due to temperature rise. The protective component is installed at the port of the beam outlet (11) via a mounting base (21). The side wall of the housing (1) is fixedly connected to the mounting base (21) via an assembly port. The glass plate (22) installed inside the protective component is used to seal the beam outlet (11), thereby protecting the curved copper mirror (20) from damage by welding spatter.
2. The ultra-high power laser welding head according to claim 1, characterized in that: One end of each of the two mounting bases (21) on the mirror tube (9) is provided with a fixing part, which is fixedly connected to one end of the mirror tube (9) by bolts. The other end of the mounting base (21) is provided with a mounting part at a 45° angle. The center point of the mounting part on one of the mounting bases (21) is located on the center line of the beam outlet (11), and the center point of the mounting part on the other mounting base (21) is located on the center line of the beam inlet (8). A water inlet pipe (14) and a water outlet pipe (15) are connected to one side of the mounting base (21). The water inlet pipe (14) and the water outlet pipe (15) are used to connect the water cooling assembly to realize the cooling water circulation. A temperature sensor (10) for monitoring the curved copper mirror (20) is installed on the side wall of the mirror tube (9).
3. The ultra-high power laser welding head according to claim 2, characterized in that: The water-cooling assembly includes an annular pipe (19), one end of which is fixedly connected to a sealing plate (17). The other side of the annular pipe (19) contacts one side of a curved copper mirror (20). The mounting part of the mounting base (21) has a round opening that matches the annular pipe (19). One side of the mounting part is fixedly connected to multiple positioning blocks (18). The annular pipe (19) is snapped into the multiple positioning blocks (18). A slot is provided at the round opening. The curved copper mirror (20) is snapped into the slot. One side of the mounting part is fixedly connected to a fixing ring (24) by bolts. The fixing ring (24) presses the curved copper mirror (20) and the annular pipe (19) together, so that the sealing plate (17) and the curved copper mirror (20) together form a water-cooling chamber by sealing the annular pipe (19). The annular pipe (19) has multiple water distribution holes (34) arranged in a ring on its side wall. The sealing plate (17) has a drain hole at its center. One end of the water outlet pipe (15) is connected to a flow guide (16). The flow guide (16) is fixed to one side of the sealing plate (17) to discharge the cooling water in the drain hole. One side of the annular pipe (19) is fixedly connected to a water inlet connector (27). The water inlet connector (27) is fixedly connected to one end of the water inlet pipe (14).
4. The ultra-high power laser welding head according to claim 3, characterized in that: The side wall of the annular pipe (19) is fixedly connected with multiple arc-shaped guide plates (32). The multiple arc-shaped guide plates (32) are grouped in pairs and fixed at the opening of the water distribution hole (34). Under the action of water pressure, the curved surface structure of the arc-shaped guide plates (32) causes the cooling water to form a swirling flow, avoiding the occurrence of dead flow corners in the water-cooled chamber.
5. The ultra-high power laser welding head according to claim 3, characterized in that: The annular pipe (19) is provided with a water distribution ring (33). The side wall of the water distribution ring (33) is provided with multiple water distribution channels. The cooling water discharged from the water inlet connector (27) is diverted through the multiple water distribution channels on the water distribution ring (33) to adjust the drainage speed in the multiple water distribution holes (34).
6. The ultra-high power laser welding head according to claim 3, characterized in that: A flow guide shroud (31) is fixedly connected inside the drain hole. Multiple drain channels (30) are provided on the side wall of the flow guide shroud (31). One end of the flow guide shroud (31) is a sealed structure. A baffle (28) is fixedly connected to the other end of the flow guide shroud (31). Multiple flow limiting holes are provided on the side wall of the baffle (28). Inclined guide fluids (29) are provided at each of the multiple flow limiting holes so that the discharged cooling water can form a swirling flow and be discharged.
7. The ultra-high power laser welding head according to claim 3, characterized in that: A positioning groove (25) is provided at the edge of the fixing ring (24). A sealing rubber ring (26) is connected to both the positioning groove (25) and the edge of the fixing ring (24). The curved copper mirror (20) is snapped into the positioning groove (25). A sealing rubber ring is provided at the lower end of the annular pipe (19). An annular groove that matches the sealing rubber ring is opened on one side of the curved copper mirror (20). The sealing rubber ring is used to seal the curved copper mirror (20) and the annular pipe (19) to prevent leakage of cooling water.
8. The ultra-high power laser welding head according to claim 1, characterized in that: The side wall of the housing (1) is provided with an inlet connector and a return connector. The inlet connector passes through the side wall of the housing (1) and is threaded to the inlet pipe (14). The return connector passes through the side wall of the housing (1) and is threaded to one end of the outlet pipe (15).
9. The ultra-high power laser welding head according to claim 1, characterized in that: The protective component includes a ring (12), which has an annular channel (13). An isolation plate (23) is fixedly connected inside the annular channel (13). Two circulating water connectors are fixedly connected to one side of the ring (12). One of the circulating water connectors is connected to the cooling water inlet pipe (14), and the other circulating water connector is connected to the cooling water return pipe. The glass plate (22) is fixed inside the ring (12). The upper end of the ring (12) is fixedly connected to the lower end of the mounting base (21). The side-blowing air knife (6) is installed at the lower end of the ring (12).
10. The ultra-high power laser welding head according to claim 1, characterized in that: The connecting frame (3) is installed at the end of the robotic arm (4), the housing (1) is installed on one side of the connecting frame (3), the feather blowing device (5) is installed on one side of the connecting frame (3) by a bracket, and the protective air pipe (7) is installed on one side of the connecting frame (3) by an adjusting support.