120-degree internal water cooling laser inner hole broadband cladding head

Abstract

The utility model relates to the technical field of plating of metal materials, in particular to a 120-degree internal water cooling laser inner hole broadband cladding head which comprises a collimation module, a light passing pipe assembly, an integral mirror module, a protective mirror module and an air knife light passing nozzle which are connected in sequence. The first cooling water channel is used for water cooling of the integral mirror module, the second cooling water channel is used for water cooling of the air knife light passing nozzle, the first cooling water channel comprises a first water inlet connector and a first water outlet connector to form a first water inlet channel and a first water outlet channel, and the second cooling water channel comprises a second water inlet connector and a second water outlet connector to form a second water outlet channel. The protection gas circuit comprises a gas inlet connector and a gas inlet pipeline, and the first water inlet connector, the first water outlet connector, the second water inlet connector, the second water outlet connector and the gas inlet connector are all arranged on the collimation module. According to the wide-band cladding head, the water path and the gas path are orderly arranged in the cladding head, so that the pipeline is prevented from being exposed and damaged by reflection of a workpiece, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plating metal materials, in particular to a 120-degree internal water-cooled laser inner hole wide-band cladding head. Background Art

[0002] Laser cladding is to add cladding materials to the surface of the substrate and use a high-density laser beam to melt and solidify with the surface of the substrate to form a metallurgical cladding layer on the surface, thereby significantly improving the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the substrate surface, thereby achieving the purpose of surface modification or repair. Commonly used technologies in the market are surfacing, spraying, electroplating, etc., that is, the process of plating a thin layer of other metals or alloys on certain metal surfaces using the principle of electrolysis. Not only is the efficiency low and the consumption high, but the electroplating industry is one of the three major polluting industries in the world (electroplating industry, battery industry, metal smelting industry) due to the large amount of pollution it produces, the complex types of pollutants, and the strong toxicity.

[0003] After searching, the patent with publication number CN114000140A discloses a laser head and reflective water cooling device for inner hole cladding, including an optical fiber interface module, a collimation module, a collimation protection mirror module, a collimation connecting flange, a light pipe fixing seat, a light pipe, a pipeline clamp, a copper tube, a copper tube joint, a focusing module, a 45° reflection module, a focusing protection mirror module, a powder feeding adjustment block, a powder feeding block, a powder feeding nozzle, a protective gas module, a translation adjustment block, a pressure ring, and a light outlet nozzle. Combined with its attached drawings, it can be seen that the copper tubes used for water cooling are all arranged on the outside, and the external water inlet and outlet pipes are messy and exposed. The reflection of the workpiece can easily burn the external pipes, thereby affecting the use. Utility Model Content

[0004] In order to solve the problem that the existing external pipes are messy and easily burned by the reflection of the workpiece, the utility model provides a 120-degree internal water-cooled laser inner hole wide-band cladding head, which arranges the water channel and the gas channel in order inside the cladding head to avoid the exposed pipes being damaged by the reflection of the workpiece and improve the service life.

[0005] The utility model provides a 120-degree internal water-cooled laser inner hole broadband cladding head, comprising a collimation module, a light pipe assembly, an integrator lens module, a protective lens module, an air knife light-through nozzle and a broadband powder feeding nozzle module that are detachably connected in sequence, and also comprises a protective air circuit, a first cooling water circuit for water cooling of the integrator lens module and a second cooling water circuit for water cooling of the air knife light-through nozzle, the first cooling water circuit comprising a water inlet joint and a water outlet joint to form a water inlet channel and a water outlet channel, the second cooling water circuit comprising a water inlet joint and a water outlet joint to form a water inlet channel and a water outlet channel, The water inlet channel 2 and the water outlet channel 2 are formed, and the protective gas circuit includes an air inlet joint to form an air inlet pipeline. The water inlet joint 1, the water outlet joint 1, the water inlet joint 2, the water outlet joint 2 and the air inlet joint are all arranged on the collimation module. The water inlet channel 1 passes through the collimation module and the light pipe assembly to the integrator mirror module in sequence. The water inlet channel 2 passes through the collimation module, the light pipe assembly, the integrator mirror module, the protective mirror module to the air knife light nozzle in sequence. The protective gas circuit passes through the collimation module, the light pipe assembly, the integrator mirror module to the protective mirror module and the air knife light nozzle in sequence. The interfaces of the cooling water circuit and the protective gas circuit are all aggregated on the collimation module, and the pipeline is built-in to realize internal circulation cooling to prevent the problem of the pipeline being exposed and damaged by the reflection of the workpiece.

[0006] Furthermore, the integrator mirror module includes an adapter, a 120-degree integrator mirror and an integrator mirror seat, the 120-degree integrator mirror is fixedly arranged on the integrator mirror seat, the integrator mirror seat is fixedly connected to the adapter, and the first cooling water circuit also has a return water channel 1, the return water channel 1 is arranged in the 120-degree integrator mirror. The water cooling of the integrator mirror module is achieved through the return water channel 1.

[0007] Furthermore, the water inlet channel 1 and the water outlet channel 1 connected to the water return channel 1 are both arranged on the upper side of the cladding head. The first cooling water channel is arranged in order on the upper side of the cladding head.

[0008] Furthermore, a light-through hole is arranged at the center of the air knife light-through nozzle, and the second cooling water circuit further has a second water return channel, which is arranged at the periphery of the light-through hole. The light-through nozzle is water-cooled through the second water return channel.

[0009] Furthermore, the second water inlet channel and the second water outlet channel connected to the second water return channel are both arranged at the lower side of the cladding head. The second cooling water channel is arranged in order at the lower side of the cladding head.

[0010] Furthermore, the protective mirror module includes a drawer mirror seat and a protective mirror, the protective mirror is embedded in the mirror hole of the drawer mirror seat, and an air ring is provided below the drawer mirror seat, the air ring is fixedly arranged between the drawer mirror seat and the air knife light passing nozzle. The air ring is arranged to reduce the impact of splashes on the protective mirror.

[0011] Furthermore, a mounting hole for accommodating an air ring is provided at the bottom of the adapter, and the outer wall of the air ring is provided with a conical surface, so that an air cavity is formed between the air ring and the mounting hole, and the air cavity is connected to the air inlet pipeline, and the other end of the air inlet pipeline is connected to the air knife polishing nozzle and ejected from the air knife polishing nozzle. The gas connected through the collimation module is blown out from the air knife polishing nozzle to form an air flow layer to prevent dust from entering.

[0012] Furthermore, the collimation module includes a collimation housing, a collimation lens group and a locking ring, wherein the collimation lens group is fixedly arranged in the collimation housing through the locking ring, one end of the collimation housing is connected to a fiber connector, and the other end is connected to a light pipe assembly. The laser beam injected from the fiber interface is adjusted into parallel light through the collimation lens group.

[0013] Furthermore, the light pipe assembly includes at least two sections of spliced ​​pipe bodies, a flange seat for easy fixation is arranged along the front end of the light path of the light pipe assembly, and a height sensor is arranged along the rear end of the light path of the light pipe assembly, and the height sensor is fixedly arranged on the outer wall of the pipe body through the sensor flange. The length of the pipe body can be set according to the length of the inner hole part.

[0014] Furthermore, the broadband powder feeding nozzle module includes a powder feeding head, a powder inlet connector and a diverter plate. The powder feeding head is connected to a powder inlet connector above, and a diverter plate is arranged obliquely below the powder feeding head, so that the powder outlet at the bottom of the diverter plate intersects with the light beam of the air knife through the nozzle. The diverter plate divides one path of powder into several paths, presenting broadband powder, and cooperates with the broadband light beam for cladding work.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a 120-degree internal water-cooled laser inner hole broadband cladding head, which realizes the heat dissipation of an integrating mirror module through a first cooling water path; realizes the heat dissipation of an air knife light-passing nozzle through a second cooling water path; realizes the blowing of air to the protective mirror through a protective air path divided into two paths, thereby reducing the influence of splashes on the protective mirror, and the other path enters the air knife light-passing nozzle and blows air from obliquely below the light-passing nozzle to prevent splashes; and by arranging the first cooling water path, the second cooling water path and the protective air path inside, it is prevented that the pipelines are exposed and damaged, thereby extending the service life of the cladding head. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the laser cladding head;

[0019] Figure 2 is an external schematic diagram of the laser cladding head;

[0020] Figure 3 It is a schematic diagram of the interior of the laser cladding head;

[0021] Figure 4 is a front-end schematic diagram of the collimation module;

[0022] Figure 5 is a schematic diagram of the back end of the collimation module;

[0023] Figure 6 It is a schematic diagram of the front end of the light pipe;

[0024] Figure 7 It is a schematic diagram of the rear end of the light pipe;

[0025] Figure 8 is the external schematic diagram of the integrating mirror module;

[0026] Fig. 9 This is the internal schematic diagram of the integrating mirror module;

[0027] Fig.10 is a structural schematic diagram of the protective mirror module;

[0028] Fig.11 It is a schematic diagram of the structure of the broadband powder delivery nozzle module;

[0029] Fig.12 is a plan view of the first cooling water circuit;

[0030] Fig.13 is a three-dimensional diagram of the first cooling water circuit;

[0031] Fig.14 This is the plan view of the second water cooling circuit;

[0032] Fig.15 is a three-dimensional diagram of the second water cooling circuit;

[0033] Fig.16 It is a plan view of the protective gas path;

[0034] Fig.17 yes Fig.16 A partial enlarged view of the

[0035] Fig.18 It is a three-dimensional diagram of the protection gas path;

[0036] In the figure, 1. collimation module, 11. collimation housing, 12. collimation lens assembly, 13. optical fiber connector, 2. light pipe assembly, 21. flange seat, 22. height sensor, 23. sensor flange, 3. integrator lens module, 31. adapter seat, 32. 120 degree integrator lens, 33. integrator lens seat, 4. protective lens module, 41. drawer lens seat, 42. protective lens, 43. air ring, 44. air cavity, 5. air knife light nozzle, 6. broadband powder delivery nozzle module , 61. Powder delivery head, 62. Powder inlet connector, 63. Diverter plate, 7. First cooling water circuit, 71. Water inlet connector 1, 72. Water outlet connector 1, 73. Return water channel 1, 74. Water inlet channel 1, 75. Water outlet channel 1, 8. Second cooling water circuit, 81. Water inlet connector 2, 82. Water outlet connector 2, 83. Return water channel 2, 84. Water inlet channel 2, 85. Water outlet channel 2, 9. Protective gas circuit, 91. Air inlet connector, 10. Light beam. DETAILED DESCRIPTION

[0037] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0038] The traditional laser cladding head includes a collimation module 1, a light pipe assembly 2, an integrating mirror module 3, a protective mirror module 4, an air knife light nozzle 5 and a broadband powder delivery nozzle module 6, which are detachably connected in sequence. The laser beam is emitted through the QB optical fiber connector 13. The collimation module 1 transmits the laser beam to the integrating mirror module 3 via the light pipe assembly 2. The 120-degree integrating mirror 32 changes the spot and focal length of the output light beam 10 of the integrating mirror module 3. The integrating mirror of the integrating mirror module 3 is replaceable to facilitate the adjustment of the output light beam spot and focal length. The preset angle makes the output light beam flush with the front end of the integral reflection at the focal position to ensure that the deepest part of the blind hole can be processed. The pipelines used for water cooling and heat dissipation of the laser cladding head are exposed outside the laser head in a messy manner, and the reflection of the workpiece is easy to burn the external pipeline. In order to improve the efficiency of the cold water and prevent the pipeline from being damaged by the reflection of the workpiece, a 120-degree internal water-cooled laser inner hole broadband cladding head is designed, such as Figures 1 to 3As shown, it includes a first cooling water circuit 7 for water cooling of the integrator mirror module 3, a second cooling water circuit 8 for water cooling of the air knife light-passing nozzle 5, and a protective gas circuit 9 for blowing the protective mirror module 4. The first cooling water circuit 7 includes a water inlet connector 1 71 and a water outlet connector 1 72 to form a water inlet channel 1 74 and a water outlet channel 1 75. The second cooling water circuit 8 includes a water inlet connector 2 81 and a water outlet connector 2 82 to form a water inlet channel 2 84 and a water outlet channel 2 85. The protective gas circuit 9 includes an air inlet connector 91 to form an air inlet pipeline 92. The water inlet connector 1 71, the water outlet connector 1 72, the water inlet connector 2 81, the water outlet connector 2 82 and the air inlet connector 91 are all arranged on the collimation module 1, the water inlet channel 1 74 sequentially passes through the collimation module 1, the light pipe assembly 2 to the integrator lens module 3, the water inlet channel 2 84 sequentially passes through the collimation module 1, the light pipe assembly 2, the integrator lens module 3, the protective lens module 4 to the air knife light nozzle 5, and the protective air path 9 sequentially passes through the collimation module 1, the light pipe assembly 2, the integrator lens module 3 to the protective lens module 4 and the air knife light nozzle 5. By internally placing the first cooling water path 7, the second cooling water path 8 and the protective air path 9, the pipelines are prevented from being exposed and damaged, thereby extending the service life of the cladding head.

[0039] The optical fiber connector 13 is used for connecting and fixing the optical fiber for transmitting laser light from the laser generator. After the laser passes through the collimating lens group 12 installed in the collimating module 1, the incident laser is adjusted to parallel light and transmitted to the terminal structure by the light pipe assembly 2; the terminal structure is an integrating mirror module 3, which is used to reflect and focus the parallel light passing through the light pipe assembly 2 at 120 degrees, and then transform the circular light spot into a wide light spot, and irradiate the workpiece surface through the protective mirror 42 and the air knife light-passing nozzle 5; a broadband powder delivery nozzle module 6 is provided on one side of the air knife light-passing nozzle 5, and the broadband powder delivery nozzle module 6 is detachable and connected to one side of the adapter 31 of the integrating mirror module 3, and the wide The powder feeding nozzle module 6 can divide the metal powder from one path into multiple paths to form a wide band powder path, which falls on the surface of the workpiece. As the workpiece rotates, the laser starts to work and clads the powder that falls on the surface of the workpiece. After laser irradiation, it is melted at the same time as a thin layer on the surface of the workpiece, and quickly solidifies to form a surface coating. The air knife light nozzle 5 and the integrator mirror module 3 are arranged at an angle, which can make the light beam emit at 120 degrees, which can effectively reduce the splash of metal powder generated during the cladding process, and the center position of the focus of the light beam irradiated to the surface of the workpiece is flush with the front end of the laser processing head, which effectively solves the problem that the traditional inner hole laser head cannot meet the requirements of repairing the bottom edge of the inner hole blind hole.

[0040] like Figure 8 and 9 As shown, specifically, the integrating mirror module 3 includes an adapter 31, a 120-degree integrating mirror 32 and an integrating mirror seat 33. The 120-degree integrating mirror 32 is fixedly arranged on the integrating mirror seat 33. The integrating mirror seat 33 is fixedly connected to the adapter 31. The angle of the integrating mirror can be changed according to the cladding requirements.

[0041] In order to ensure the heat dissipation effect of the integrating mirror module 3 , the first cooling water path 7 further has a water return channel 1 73 , and the water return channel 1 73 is arranged in the 120-degree integrating mirror 32 .

[0042] In order to ensure the heat dissipation effect of the air knife polishing nozzle 5, a light-through hole is arranged at the center of the air knife polishing nozzle 5, and the second cooling water path 8 also has a second return water channel 83, which is arranged outside the light-through hole.

[0043] In order to prevent the internal cooling water channels from affecting each other, the water inlet channel 74 and the water outlet channel 75 connected to the return water channel 73 are both arranged on the upper side of the cladding head, and the water inlet channel 84 and the water outlet channel 85 connected to the return water channel 83 are both arranged on the lower side of the cladding head.

[0044] like Fig.10 As shown, specifically, the protective mirror module 4 includes a drawer mirror seat 41 and a protective mirror 42. The protective mirror 42 is embedded in the mirror hole of the drawer mirror seat 41. An air ring 43 is also provided below the drawer mirror seat 41. The air ring 43 is fixedly provided between the drawer mirror seat 41 and the air knife light-passing nozzle 5. The protective mirror module 4 is tiltedly arranged in the adapter seat 31 so that the light beam is perpendicular to the protective mirror module 4. The drawer mirror seat 41 is convenient for pulling the mirror seat out of the adapter seat 31. The drawer mirror seat 41 is fixed to the adapter seat 31 with bolts to complete the installation of the protective mirror 42. In order to monitor the temperature of the protective mirror 42 in real time, a temperature sensor is also provided in the drawer mirror seat 41 to prevent the lens from burning.

[0045] A mounting hole for accommodating an air ring 43 is provided at the bottom of the adapter seat 31. The outer wall of the air ring 43 is configured in a conical surface so that an air cavity 44 is formed between the air ring 43 and the mounting hole. The air cavity 44 is connected to the air inlet pipe 92 to form an air flow layer to prevent dust from entering. The other end of the air inlet pipe 92 is connected to the air knife polishing nozzle 5 and is sprayed out from the air knife polishing nozzle 5.

[0046] like Figure 4 and 5 As shown, specifically, the collimation module 1 includes a collimation housing 11, a collimation lens group 12 and a locking ring. The collimation lens group 12 is fixedly arranged in the collimation housing 11 through the locking ring. One end of the collimation housing 11 is connected to a fiber connector 13, and the other end is connected to the light pipe assembly 2. By setting the collimation lens group 12, the laser can be adjusted to parallel light after passing through the collimation lens, laying a foundation for entering the integrator lens module 3, thereby improving the process effect and quality of the laser cladding process.

[0047] like Figure 6 and 7As shown, specifically, the light pipe assembly 2 includes at least two sections of spliced ​​tube bodies, the length of which can be set according to the length of the inner hole part, and the light pipe assembly 2 extends into the adapter seat 31 of the integrator lens module 3 and is fixedly connected to the adapter seat 31. The light pipe assembly 2 is provided with a flange seat 21 for easy fixation along the front end of the optical path, and a height sensor 22 is provided along the rear end of the optical path. The height sensor 22 is fixedly arranged on the outer wall of the tube body through a sensor flange 23. A mounting hole for accommodating the height sensor 22 is provided in the sensor flange 23. The height sensor 22 is fixed in the mounting hole through locking nuts arranged at the front and rear ends thereof. When the cladding head extends into the inner hole of the part for operation, the height sensor 22 is used to measure the distance between the air knife light nozzle 5 and the inner hole wall. The principle is similar to that of tool setting, thereby ensuring the normal operation of the cladding head.

[0048] Specifically, the wide-band powder feeding nozzle module 6 includes a powder feeding head 61, a powder inlet connector 62 and a diverter plate 63. The powder feeding head 61 is connected with the powder inlet connector 62 above, and the diverter plate 63 is obliquely arranged below the powder feeding head 61, so that the powder outlet at the bottom of the diverter plate 63 intersects with the light beam 10 of the air knife through-light nozzle 5. The diverter plate 63 is generally provided with three-way powder distribution channels, which evenly divides one way of powder in the powder feeding head 61 into three ways. The several ways of metal powder form a wide-band metal powder, which can be connected to the laser to perform wide-band repair of the inner hole, greatly saving time and increasing the efficiency and benefit of laser cladding processing.

[0049] like Fig.12 and 13 As shown, the first cooling water path 7 enters from the collimating module 1 to provide cold water for the collimating lens group 12, and then enters the 120-degree integrating mirror 32 of the integrating mirror module 3 through the light pipe assembly 2, forming a cycle in the 120-degree integrating mirror 32 to provide water cooling for the integrating mirror when it is working.

[0050] like Fig.14 and 15 As shown, the second cooling water path 8 enters from the collimating module 1 to provide cold water for the collimating lens group 12, and then passes through the light pipe assembly 2 and the integrator lens module 3 in sequence to form a circulation around the light hole of the air knife light-through nozzle 5, providing water cooling for the air knife light-through nozzle 5 when it is working.

[0051] like Figures 16 to 18 As shown, the protective gas path 9 enters from the collimation module 1, passes through the light-passing tube assembly 2, and is divided into two paths by the adapter seat 31. One path enters the interior of the adapter seat 31 and is connected with the air cavity 44 outside the air ring 43, forming a ring-shaped air knife under the protective mirror 42 to reduce the impact of splashes on the protective mirror 42. The other path enters the air knife light-passing nozzle 5, and blows air obliquely downward from the light outlet inside the air knife light-passing nozzle 5 to prevent splashes.

[0052] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A 120-degree internal water-cooled laser inner hole broadband cladding head, comprising a collimation module (1), a light pipe assembly (2), an integrating mirror module (3), a protective mirror module (4), an air knife light nozzle (5) and a broadband powder feeding nozzle module (6) which are detachably connected in sequence, characterized in that: Also includes A first cooling water circuit (7) is used for water cooling of the integrating mirror module (3), wherein the first cooling water circuit (7) comprises a water inlet connector 1 (71) and a water outlet connector 1 (72), forming a water inlet channel 1 (74) and a water outlet channel 1 (75), A second cooling water circuit (8) is used for water cooling of the air knife polishing nozzle (5), wherein the second cooling water circuit (8) comprises a second water inlet joint (81) and a second water outlet joint (82), forming a second water inlet channel (84) and a second water outlet channel (85), and A protective gas circuit (9) is used for blowing the protective mirror module (4), wherein the protective gas circuit (9) comprises an air inlet connector (91) to form an air inlet pipeline (92). The water inlet joint 1 (71), the water outlet joint 1 (72), the water inlet joint 2 (81), the water outlet joint 2 (82) and the air inlet joint (91) are all arranged on the collimating module (1); the water inlet channel 1 (74) sequentially passes through the collimating module (1), the light pipe assembly (2) to the integrator mirror module (3); the water inlet channel 2 (84) sequentially passes through the collimating module (1), the light pipe assembly (2), the integrator mirror module (3), the protective mirror module (4) to the air knife light-through nozzle (5); and the protective air path (9) sequentially passes through the collimating module (1), the light pipe assembly (2), the integrator mirror module (3) to the protective mirror module (4) and the air knife light-through nozzle (5).

2. A 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 1, characterized in that: The integrating mirror module (3) comprises an adapter seat (31), a 120-degree integrating mirror (32) and an integrating mirror seat (33); the 120-degree integrating mirror (32) is fixedly arranged on the integrating mirror seat (33); the integrating mirror seat (33) is fixedly connected to the adapter seat (31); the first cooling water circuit (7) further comprises a water return channel 1 (73); the water return channel 1 (73) is arranged in the 120-degree integrating mirror (32).

3. A 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 2, characterized in that: The water inlet channel 1 (74) and the water outlet channel 1 (75) connected to the water return channel 1 (73) are both arranged on the upper side of the cladding head.

4. A 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 1, characterized in that: The center of the air knife polishing nozzle (5) is provided with a light-through hole, and the second cooling water channel (8) also has a second water return channel (83), and the second water return channel (83) is arranged outside the light-through hole.

5. A 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 4, characterized in that: The second water inlet channel (84) and the second water outlet channel (85) connected to the second water return channel (83) are both arranged on the lower side of the cladding head.

6. A 120-degree internal water-cooled laser inner hole wide band cladding head according to claim 2, characterized in that: The protective mirror module (4) comprises a drawer mirror seat (41) and a protective mirror (42), wherein the protective mirror (42) is embedded in a mirror hole of the drawer mirror seat (41), and an air ring (43) is further provided below the drawer mirror seat (41), wherein the air ring (43) is fixedly arranged between the drawer mirror seat (41) and the air knife light-passing nozzle (5).

7. A 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 6, characterized in that: The bottom of the adapter (31) is provided with a mounting hole for accommodating an air ring (43); the outer wall of the air ring (43) is arranged in a conical surface, so that an air cavity (44) is formed between the air ring (43) and the mounting hole; the air cavity (44) is connected to an air inlet pipe (92); the other end of the air inlet pipe (92) is connected to an air knife polishing nozzle (5) and is ejected from the air knife polishing nozzle (5).

8. The 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 1, characterized in that: The collimation module (1) comprises a collimation housing (11), a collimation lens group (12) and a locking ring; the collimation lens group (12) is fixedly arranged in the collimation housing (11) via the locking ring; one end of the collimation housing (11) is connected to an optical fiber connector (13) and the other end is connected to a light pipe assembly (2).

9. The 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 1, characterized in that: The light-through pipe assembly (2) comprises at least two sections of spliced ​​pipe bodies, a flange seat (21) for easy fixation is arranged along the front end of the light path of the light-through pipe assembly (2), and a height sensor (22) is arranged along the rear end of the light path of the light-through pipe assembly (2), and the height sensor (22) is fixedly arranged on the outer wall of the pipe body via a sensor flange (23).

10. The 120-degree internal water-cooled laser inner hole wide-band cladding head according to claim 2, characterized in that: The broadband powder delivery nozzle module (6) comprises a powder delivery head (61), a powder inlet connector (62) and a diverter plate (63); the powder delivery head (61) is connected to the top with the powder inlet connector (62); the powder delivery head (61) is obliquely provided with a diverter plate (63) below the powder delivery head (61) so that the powder outlet at the bottom of the diverter plate (63) intersects with the light beam (10) of the air knife light-passing nozzle (5).

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