Handheld laser welding gun

Abstract

The present application provides a handheld laser wire-filling welding gun, which relates to the field of welding technology. The handheld laser wire-filling welding gun can realize the laser wire-filling welding process, thereby meeting the need to use the laser wire-filling welding process in some scenarios. In addition, since the wire feeding fixed sleeve is sleeved on the outside of the gun nozzle mechanism and can be rotated relative to the gun nozzle mechanism, the position of the wire feeding tube relative to the gun nozzle mechanism can be manually adjusted so that the welding wire is delivered to the light path emitted by the gun nozzle mechanism at a suitable position. The locking assembly can abut or not abut the gun nozzle mechanism, so that the wire feeding fixed sleeve can selectively lock the position relative to the gun nozzle mechanism. When it is necessary to rotate the wire feeding fixed sleeve to adjust the position of the wire feeding tube, the locking assembly is unlocked. Therefore, the handheld laser wire-filling welding gun provided in the embodiment of the present application is more flexible to use, and can feed wire to the welding position from multiple angles, which can meet the use requirements of more scenarios.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to a handheld laser wire-filling welding gun. Background Art

[0002] In recent years, with the rapid development of fiber lasers and high-power lasers, laser welding technology has been improved in terms of output power, processing efficiency, precision and quality, and the scope of laser welding applications has been continuously expanded. Traditional laser welding equipment is usually fixed on a welding workbench or welding robot arm. The equipment takes up a large space, has harsh operating conditions, and has complex tooling. At present, handheld laser welding guns have appeared on the market, which are laser external light path equipment. However, the existing handheld laser welding guns are still not flexible enough, cannot use laser wire welding process, and are limited in usage scenarios. Summary of the invention

[0003] The purpose of this application includes providing a handheld laser wire-filling welding gun, which is more flexible to use and can meet the needs of use in more scenarios.

[0004] The embodiments of the present application can be implemented as follows:

[0005] In a first aspect, the present application provides a handheld laser wire-filling welding gun, comprising:

[0006] A gun nozzle mechanism, the gun nozzle mechanism having a channel for the laser to pass through and having an emission end;

[0007] The wire feeding mechanism includes a wire feeding fixed sleeve, a wire feeding tube and a locking assembly. The wire feeding fixed sleeve is sleeved on the outside of the gun nozzle mechanism and can rotate relative to the gun nozzle mechanism. The wire feeding tube is arranged on the wire feeding fixed sleeve and is used to transport the welding wire on the light path emitted from the emitting end of the gun nozzle mechanism. The locking assembly is arranged on the wire feeding fixed sleeve and can move radially along the wire feeding fixed sleeve to abut or separate from the gun nozzle mechanism. When the locking assembly abuts against the gun nozzle mechanism, it can prevent the wire feeding fixed sleeve from rotating relative to the gun nozzle mechanism.

[0008] In an optional embodiment, an avoidance groove is formed on the inner wall of the wire feeding fixed sleeve, and a through hole is formed at the bottom of the avoidance groove, which radially penetrates to the outside of the wire feeding fixed sleeve, and the locking assembly includes a supporting member and an operating member, the supporting member is located inside the wire feeding fixed sleeve, and the operating member is located outside the wire feeding fixed sleeve, the supporting member and the operating member are connected via a shaft body passing through the through hole, and the operating member can drive the shaft body to move along the through hole, so that the supporting member partially extends out of the avoidance groove and abuts against the nozzle mechanism, or is received in the avoidance groove and separated from the nozzle mechanism.

[0009] In an optional embodiment, a plurality of slots arranged circumferentially are provided on the outer peripheral side of the gun nozzle mechanism, and a clamping strip for cooperating with the slots is provided on the abutting member.

[0010] In an optional embodiment, the gun nozzle mechanism includes a gun nozzle and a gun nozzle fastening sleeve, the gun nozzle is tubular, the gun nozzle fastening sleeve is arranged on the outside of the gun nozzle, and the slot is formed on the outer peripheral side of the gun nozzle fastening sleeve.

[0011] In an optional embodiment, the locking assembly further comprises a spring, which is sleeved on the shaft body, one end of which abuts against the abutting member, and the other end abuts against the bottom of the avoidance groove, so that the abutting member has a tendency to approach the muzzle mechanism.

[0012] In an optional embodiment, the wire feeding fixed sleeve is further provided with a mounting hole, the mounting hole extends along the axial direction of the wire feeding fixed sleeve, and the wire feeding tube is inserted into the mounting hole.

[0013] In an optional embodiment, a screw hole is also provided on the side wall of the wire feeding fixed sleeve, and the screw hole passes through the outer circumferential surface of the wire feeding fixed sleeve to the mounting hole. A fastening bolt that cooperates with the screw hole is also provided on the side wall of the wire feeding fixed sleeve. The fastening bolt is screwed into the screw hole to abut the wire feeding tube in the mounting hole.

[0014] In an optional embodiment, the handheld laser wire-filling welding gun also includes a fiber optic integrated adapter, a collimation mechanism and an optical path adapter mechanism. The fiber optic integrated adapter is used to fix the optical fiber head of the laser and receive the laser input therefrom. The collimation mechanism is connected to the fiber optic integrated adapter and is used to convert the divergent light received by the fiber optic integrated adapter into parallel light. The optical path adapter mechanism is connected to the collimation mechanism and is used to converge the parallel light. The converged laser can be emitted through the channel of the gun nozzle mechanism.

[0015] In an optional embodiment, the optical path adapter mechanism includes a focusing lens for converging parallel light, and the handheld laser wire-filling welding gun also includes a protective lens mechanism, which is disposed around the focusing lens.

[0016] In an optional embodiment, the handheld laser wire welding gun further includes a galvanometer mechanism for causing the laser to generate a swing amplitude.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The handheld laser wire-filling welding gun provided in the embodiment of the present application can realize the laser wire-filling welding process, thereby meeting the need to use the laser wire-filling welding process in some scenarios. In addition, since the wire feeding fixed sleeve is sleeved on the outside of the gun nozzle mechanism and can rotate relative to the gun nozzle mechanism, the position of the wire feeding tube relative to the gun nozzle mechanism can be manually adjusted so that the welding wire is delivered to the light path emitted by the gun nozzle mechanism at a suitable position. The locking assembly can abut or not abut the gun nozzle mechanism, so that the wire feeding fixed sleeve can selectively lock the position relative to the gun nozzle mechanism. When it is necessary to rotate the wire feeding fixed sleeve to adjust the position of the wire feeding tube, the locking assembly is unlocked. Therefore, the handheld laser wire-filling welding gun provided in the embodiment of the present application is more flexible to use, and can feed wire to the welding position from multiple angles, which can meet the use requirements of more scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of a handheld laser wire-filling welding gun in one embodiment of the present application;

[0021] Figure 2 is a first exploded view of a handheld laser wire welding gun in one embodiment of the present application;

[0022] Figure 3 is a second exploded view of a handheld laser wire welding gun in one embodiment of the present application;

[0023] Figure 4 is an exploded view of a gun nozzle mechanism in one embodiment of the present application;

[0024] Figure 5 is an exploded view of a wire feeding mechanism in one embodiment of the present application;

[0025] Figure 6 It is an assembly cross-sectional view of a nozzle mechanism and a wire feeding mechanism in one embodiment of the present application.

[0026] Icons: 1-fiber integrated adapter; 2-collimation mechanism; 201-collimation lens seat; 202-collimation lens elastic gasket; 203-collimation lens; 204-collimation lens pressure ring; 205-collimation optical path sealing ring; 206-collimation lens locking pressure ring; 3-optical path adapter mechanism; 301-optical path reflection adapter; 302-gas path sealing ring; 303-focusing lens elastic gasket; 304-focusing lens; 305-focusing lens pressure ring; 306-focusing lens locking pressure ring; 4-galvanometer mechanism; 401-reflector; 402-high-speed scanning galvanometer system; 5-protection mirror mechanism; 5 01-protective mirror pressure ring; 502-protective mirror; 503-protective mirror bracket; 504-protective mirror mounting seat; 505-protective mirror sealing ring; 6-gun nozzle mechanism; 601-gun nozzle; 602-gun nozzle fastening sleeve; 603-gun nozzle clamping ring; 604-gun nozzle threaded pressure ring; 605-gun nozzle ceramic contact connector; 7-wire feeding mechanism; 701-wire feeding fixed sleeve; 702-supporting part; 703-spring; 704-operating part; 705-wire feeding nozzle; 706-wire feeding tube; 707-fastening bolt; 708-connector socket; 709-connector plug. DETAILED DESCRIPTION

[0027] At present, laser welding technology is constantly innovating, and a variety of laser-based composite welding processes and equipment have been developed, such as laser wire welding process, handheld laser welding machine, etc. Traditional laser welding equipment is usually fixed on the welding workbench or welding robot arm, the equipment occupies a large space, the use conditions are harsh, and the tooling is complex. At present, a handheld laser welding machine has appeared. It is a laser external light path equipment that replaces the traditional fixed light path. It is hand-held welding, flexible and convenient, with a longer welding distance, overcoming the limitations of the workbench space. It is widely used in the welding of stainless steel, galvanized sheet, aluminum alloy, titanium alloy and other plates in the kitchen appliance, bathroom, furniture and other industries. However, due to the high energy concentration of the laser, the handheld laser welding machine has high requirements for the workpiece groove processing and assembly accuracy, and high requirements for the technical level of the welder. At the same time, it cannot meet the requirements of some weldments for the microstructure and performance of the weld area, which greatly limits the use of handheld laser welding machines.

[0028] In some welding scenarios, the laser wire welding process is needed to meet the welding requirements. This process not only maintains the inherent advantages of laser welding, but also improves the surface forming of the workpiece laser welding, improves the mechanical properties of the joint, prevents cracks, and achieves lower power. However, the wire feeding position of existing laser welding equipment is difficult to adjust, resulting in difficulty in completing welding operations in some scenarios, or extremely high requirements for operators.

[0029] In order to improve the above-mentioned deficiencies of the prior art, an embodiment of the present application provides a handheld laser wire-filling welding gun with conveniently adjustable wire-filling position to meet the needs of welding operations in different scenarios.

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0035] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0036] Figure 1 This is a schematic diagram of the structure of a handheld laser wire-filling welding gun in one embodiment of the present application; Figure 2 This is a first exploded view of a handheld laser welding gun in one embodiment of the present application. Figure 1 and Figure 2 This embodiment provides a handheld laser wire-filling welding gun, which can be used by hand or mounted on a mechanical arm. The handheld laser wire-filling welding gun includes an optical fiber integrated adapter 1, a collimation mechanism 2, an optical path adapter mechanism 3, a galvanometer mechanism 4, a protective mirror mechanism 5, a gun nozzle mechanism 6, and a wire feeding mechanism 7.

[0037] The fiber integrated adapter 1 is used to fix the fiber head of the laser (not shown in the figure) and receive the laser input therefrom. The collimation mechanism 2 is connected to the fiber integrated adapter 1 and is used to convert the divergent light received by the fiber integrated adapter 1 into parallel light. The optical path adapter mechanism 3 is connected to the collimation mechanism 2 and is used to converge the parallel light. The converged laser can be emitted through the channel of the gun nozzle mechanism 6. The galvanometer mechanism 4 is used to make the laser produce a swing. The protective mirror mechanism 5 is arranged around the focusing mirror 304 of the optical path adapter mechanism 3, and its main function is to isolate the external environment and protect the focusing mirror 304. The gun nozzle mechanism 6 is used to emit the laser converged by the optical path adapter mechanism 3.

[0038] Figure 3 FIG. 2 is a second exploded view of a handheld laser wire welding gun according to an embodiment of the present application. Figure 2 , Figure 3 As shown, the collimation mechanism 2 is connected to the optical fiber integrated adapter 1 along the transmission direction of the parallel light, and the collimation mechanism 2 has a first optical path cavity, which converts the divergent incident light transmitted by the optical fiber into parallel light. The collimation mechanism 2 includes a collimation lens seat 201, a collimation lens elastic gasket 202, a collimation lens 203, a collimation lens pressure ring 204, a collimation optical path sealing ring 205, and a collimation lens locking pressure ring 206. The heat of the collimation mechanism 2 is relatively concentrated, and it is easy to overheat and cause the optical path cavity of the welding gun to deform, reduce the service life of the handheld laser wire-filling welding gun, and affect the welding quality. Therefore, in the embodiment of the present application, a water-cooling circulation pipeline (not shown in the figure) is designed inside the collimation mechanism 2, which can effectively extend the service life of the handheld laser wire-filling welding gun and improve the operator's comfort.

[0039] The optical path adapter mechanism 3 is connected to the collimation mechanism 2 along the transmission direction of the parallel light. In the present embodiment, the optical path adapter mechanism 3 is composed of an optical path reflection adapter 301, an air path sealing ring 302, a focusing mirror elastic gasket 303, a focusing mirror 304, a focusing mirror pressure ring 305, and a focusing mirror locking pressure ring 306. Its main function is to construct a second optical path cavity, and to reflect the parallel light emitted from the first optical path cavity onto the focusing mirror 304 at a certain angle through the reflecting mirror 401, and the parallel light is converged into a focused light spot through the focusing mirror 304.

[0040] The galvanometer mechanism 4 is composed of a reflector 401 and a high-speed scanning galvanometer system 402. The galvanometer scanning technology is used to realize rapid swing of the laser during welding, and the weld width can be adjusted to effectively avoid defects such as unstable weld quality or disconnection caused by excessive or uneven workpiece gaps. At the same time, the requirements for the operational stability of the handheld laser wire filling welding gun are reduced, making manual operation easier.

[0041] In this embodiment, the protective lens mechanism 5 includes a protective lens pressing ring 501, a protective lens 502, a protective lens bracket 503, a protective lens mounting seat 504, and a protective lens sealing ring 505. The light beam focused by the focusing lens 304 passes through the protective lens 502 and is emitted from the gun nozzle. The main function of the protective lens 502 is to isolate the external environment and protect the focusing lens 304. Since the protective lens 502 is a consumable item, it is designed as a drawer-type protective lens mounting seat to facilitate the installation and replacement of the protective lens.

[0042] Figure 4 This is an exploded view of the gun nozzle mechanism in one embodiment of the present application. Figure 4 In the embodiment of the present application, the gun nozzle mechanism 6 has a channel for the laser to pass through, and has a launch end, that is, Figure 4 The left end of the gun nozzle 601. The gun nozzle mechanism 6 includes a gun nozzle 601, a gun nozzle fastening sleeve 602, a gun nozzle clamping ring 603, a gun nozzle threaded pressure ring 604 and a gun nozzle ceramic contact joint 605. The gun nozzle 601 is electrically connected to the metal contact in the gun nozzle ceramic contact joint 605 through an adapter, and the metal contact in the gun nozzle ceramic contact joint 605 is connected to the control circuit. When working, the gun nozzle 601 contacts the welding workpiece, and the laser can only start working when the welding workpiece is grounded, which plays a role in safety protection. In this embodiment, the outer peripheral side of the gun nozzle mechanism 6 is provided with a plurality of card slots arranged circumferentially, such as Figure 4 As shown in , the gun nozzle 601 is tubular, the gun nozzle fastening sleeve 602 is sleeved on the outside of the gun nozzle 601, and the card slot is arranged on the outer peripheral side of the gun nozzle fastening sleeve 602, which is used to cooperate with the locking component of the wire feeding mechanism 7. Specifically, the gun nozzle fastening sleeve 602 is cylindrical, and the card slot is a V-shaped card slot.

[0043] Figure 5 This is an exploded view of a wire feeding mechanism 7 in one embodiment of the present application; Figure 6 This is a cross-sectional view of the assembly of the nozzle mechanism 6 and the wire feeding mechanism 7 in one embodiment of the present application. Figures 4 to 6 The wire feeding mechanism 7 includes a wire feeding fixed sleeve 701, a wire feeding tube 706 and a locking assembly. The wire feeding fixed sleeve 701 is sleeved on the outside of the gun nozzle mechanism 6 and can rotate relative to the gun nozzle mechanism 6. The wire feeding tube 706 is arranged on the wire feeding fixed sleeve 701 and is used to transport the welding wire to the optical path emitted from the emission end of the gun nozzle mechanism 6. The locking assembly is arranged on the wire feeding fixed sleeve 701 and can move radially along the wire feeding fixed sleeve 701 to abut or separate from the gun nozzle mechanism 6. When the locking assembly abuts against the gun nozzle mechanism 6, it can prevent the wire feeding fixed sleeve 701 from rotating relative to the gun nozzle mechanism 6.

[0044] Specifically, the locking assembly includes a supporting member 702, a spring 703 and an operating member 704. The wire feeding mechanism 7 also includes a wire feeding nozzle 705, a fastening bolt 707, a connector socket 708 and a connector plug 709. The wire feeding nozzle 705 is connected to the wire feeding tube 706 by threads, so that wire feeding nozzles 705 of different models and sizes can be easily replaced. The wire feeding fixed sleeve 701 is provided with a mounting hole, which extends along the axial direction of the wire feeding fixed sleeve 701, and the wire feeding tube 706 is inserted into the mounting hole.

[0045] In this embodiment, a screw hole is also provided on the side wall of the wire feeding fixed sleeve 701, and the screw hole passes through the outer circumferential surface of the wire feeding fixed sleeve 701 to the mounting hole. A fastening bolt 707 matching the screw hole is provided on the side wall of the wire feeding fixed sleeve 701, and the fastening bolt 707 is screwed into the screw hole to abut the wire feeding tube 706 in the mounting hole.

[0046] The connector socket 708 is connected to the wire feeding tube 706 by threads, and the connector plug 709 is connected to the connector socket 708 by fastening bolts 707, so as to facilitate the installation of the wire feeding tube connected from the servo motor of the equipment. The inner diameter of the wire feeding fixed shaft sleeve 701 is consistent with the outer diameter of the gun nozzle fastening sleeve 602.

[0047] like Figure 5 As shown in , the inner wall of the wire feeding fixed sleeve 701 is provided with an avoidance groove, and the bottom of the avoidance groove is provided with a through hole, which radially penetrates to the outside of the wire feeding fixed sleeve 701, the abutting member 702 is located inside the wire feeding fixed sleeve 701, and the operating member 704 is located outside the wire feeding fixed sleeve 701. The abutting member 702 and the operating member 704 are connected by a shaft body penetrating the through hole, and the operating member 704 can drive the shaft body to move along the through hole, so that the abutting member 702 partially extends out of the avoidance groove and abuts against the gun nozzle mechanism 6 (specifically, the outer peripheral surface of the gun nozzle fastening sleeve 602), or is received in the avoidance groove and separated from the gun nozzle mechanism 6. In order to better limit the rotation of the wire feeding fixed sleeve 701 when the abutting member 702 abuts against the outer peripheral side of the gun nozzle fastening sleeve 602, a clamping strip for cooperating with the clamping groove is provided on the abutting member 702. Of course, in other optional embodiments, the holding piece 702 and the gun nozzle fastening sleeve 602 can also be limited by the structure of the protrusion and the blind hole; or in some other embodiments, the holding piece 702 and the gun nozzle fastening sleeve 602 can be locked by a large friction force. In this embodiment, the spring 703 is sleeved on the shaft, one end of which abuts against the holding piece 702 and the other end abuts against the bottom of the avoidance groove, so that the holding piece 702 has a tendency to approach the gun nozzle mechanism 6, so that in the absence of external force, the holding piece 702 can be tightly abutted on the gun nozzle fastening sleeve 602, so as to improve the relative stability between the wire feeding mechanism 7 and the gun nozzle mechanism 6.

[0048] The wire feeding mechanism 7 can be locked on the gun nozzle fastening sleeve 602 by the spring 703 and the abutting piece 702. When the wire feeding angle needs to be adjusted according to the laser wire-filling welding process, the operating member 704 of the wire feeding mechanism 7 is pulled outward to pull the abutting piece 702 out of the card slot of the gun nozzle fastening sleeve 602, and the wire feeding mechanism 7 can be rotated 360° around the axis of the gun nozzle 601. Rotate the wire feeding mechanism 7, and after the angle is adjusted, release the operating member 704 of the wire feeding mechanism 7. Under the action of the spring 703, the abutting piece 702 is re-inserted into the V-shaped card slot of the gun nozzle fastening sleeve 602, thereby locking the wire feeding mechanism 7. If the laser wire-filling welding process is not used, the wire feeding mechanism 7 can be conveniently removed by the same method to reduce the weight of the handheld laser wire-filling welding gun and facilitate handheld operation.

[0049] In the entire optical path system, the collimator lens seat 201, the optical path reflection adapter seat 301, and the protective lens mounting seat 504 are designed with a connected gas path system. The protective gas enters from the protective gas inlet at the bottom of the collimator lens seat 201, passes through the collimator lens seat 201, the optical path reflection adapter seat 301, and the protective lens mounting seat 504 in turn, enters the internal cavity of the protective lens mounting seat 504 from the air outlet at the bottom of the protective lens mounting seat 504, and then passes through the gun nozzle mechanism 6 and is sprayed out from the gun nozzle 601. During the welding process, the welding slag splashed by the laser welding can be blown away to protect the weld, thereby improving the welding quality and extending the life of the protective lens 502.

[0050] In summary, the handheld laser wire-filling welding gun provided in the embodiment of the present application can realize the laser wire-filling welding process, thereby meeting the need to use the wire-filling welding process in some scenarios. In addition, since the wire feeding fixed sleeve is sleeved on the outside of the gun nozzle mechanism and can rotate relative to the gun nozzle mechanism, the position of the wire feeding tube relative to the gun nozzle mechanism can be manually adjusted so that the welding wire is delivered to the light path emitted by the gun nozzle mechanism at a suitable position. The locking assembly can abut or not abut the gun nozzle mechanism, so that the wire feeding fixed sleeve can selectively lock the position relative to the gun nozzle mechanism. When it is necessary to rotate the wire feeding fixed sleeve to adjust the position of the wire feeding tube, the locking assembly is unlocked. Therefore, the handheld laser wire-filling welding gun provided in the embodiment of the present application is more flexible to use, and can feed wire to the welding position from multiple angles, which can meet the use requirements of more scenarios.

[0051] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A handheld laser welding gun, characterized in that: include: A gun nozzle mechanism, the gun nozzle mechanism having a channel for laser to pass through and having an emission end; A wire feeding mechanism, wherein the wire feeding mechanism comprises a wire feeding fixed sleeve, a wire feeding tube and a locking assembly, wherein the wire feeding fixed sleeve is sleeved on the outside of the gun nozzle mechanism and can rotate relative to the gun nozzle mechanism, the wire feeding tube is arranged on the wire feeding fixed sleeve and is used to feed welding wire to the optical path emitted by the emitting end of the gun nozzle mechanism, the locking assembly is arranged on the wire feeding fixed sleeve and can move radially along the wire feeding fixed sleeve to abut or separate from the gun nozzle mechanism, and can prevent the wire feeding fixed sleeve from rotating relative to the gun nozzle mechanism when the locking assembly abuts against the gun nozzle mechanism, the wire feeding fixed sleeve is also provided with a mounting hole, the mounting hole extends along the axial direction of the wire feeding fixed sleeve, and the wire feeding tube is inserted in the mounting hole; The handheld laser wire-filling welding gun also includes a galvanometer mechanism for causing the laser to generate a swing amplitude.

2. The handheld laser welding gun with wire filling according to claim 1, characterized in that: The inner wall of the wire feeding fixed sleeve is provided with an avoidance groove, and the bottom of the avoidance groove is provided with a through hole, and the through hole radially penetrates to the outside of the wire feeding fixed sleeve, and the locking assembly includes a supporting member and an operating member, the supporting member is located in the wire feeding fixed sleeve, and the operating member is located outside the wire feeding fixed sleeve, the supporting member and the operating member are connected via a shaft body penetrating the through hole, and the operating member can drive the shaft body to move along the through hole, so that the supporting member partially extends out of the avoidance groove and abuts against the gun nozzle mechanism, or is received in the avoidance groove and separated from the gun nozzle mechanism.

3. The handheld laser welding gun with wire filling according to claim 2, characterized in that: The outer peripheral side of the gun nozzle mechanism is provided with a plurality of slots arranged around the circumference, and the abutting member is provided with a clamping strip for cooperating with the slots.

4. The handheld laser welding gun with wire filling according to claim 3, characterized in that: The gun nozzle mechanism comprises a gun nozzle and a gun nozzle fastening sleeve, the gun nozzle is tubular, the gun nozzle fastening sleeve is sleeved on the outside of the gun nozzle, and the slot is formed on the outer peripheral side of the gun nozzle fastening sleeve.

5. The handheld laser welding gun with wire filling according to claim 2, characterized in that: The locking assembly also includes a spring, which is sleeved on the shaft body, one end of which abuts against the abutting member, and the other end abuts against the bottom of the avoidance groove, so that the abutting member has a tendency to approach the gun nozzle mechanism.

6. The handheld laser welding gun with wire filling according to claim 1, characterized in that: A screw hole is also provided on the side wall of the wire feeding fixed sleeve, and the screw hole passes through the outer peripheral surface of the wire feeding fixed sleeve to the mounting hole. A fastening bolt that cooperates with the screw hole is also provided on the side wall of the wire feeding fixed sleeve, and the fastening bolt is screwed into the screw hole to abut the wire feeding tube in the mounting hole.

7. The handheld laser welding gun with wire filling according to claim 1, characterized in that: The handheld laser wire-filling welding gun also includes an optical fiber integrated adapter, a collimation mechanism and an optical path adapter mechanism. The optical fiber integrated adapter is used to be fixed to the optical fiber head of the laser and receive the laser input therefrom. The collimation mechanism is connected to the optical fiber integrated adapter and is used to convert the divergent light received by the optical fiber integrated adapter into parallel light. The optical path adapter mechanism is connected to the collimation mechanism and is used to converge the parallel light. The converged laser can be emitted through the channel of the gun nozzle mechanism.

8. The handheld laser welding gun with wire filling according to claim 7, characterized in that: The optical path adapter mechanism includes a focusing mirror for converging parallel light, and the handheld laser wire-filling welding gun also includes a protective mirror mechanism, which is arranged around the focusing mirror.

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