A digital handheld laser welding head with integrated drive and control

Abstract

The invention relates to the technical field of laser welding heads, and discloses a drive-control integrated digital handheld laser welding head, comprising a welding head mechanism, wherein the welding head mechanism comprises a welding head shell, a welding head body and an internal protective gas inlet; the handheld welding head adjusts the signal transmission distance between the galvanometer motor driver and the galvanometer motor body to be reduced to 20 mm, thereby improving the shielding performance of the wire itself; at the same time, the four functions of laser transmission, cooling medium, protective gas and communication power supply are integrated through a rear interface mechanism to achieve a four-in-one effect, thereby achieving lightweight and miniaturized application of the handheld head, and improving the portability during handheld operation; aerosols and gases with heat will enter the inner connecting tube along an outer protective sleeve, and be discharged along an exhaust pipe on one side of the inner connecting tube, thereby being able to timely extract the aerosols generated during the welding process, thereby improving the stability during the welding process, and reducing the impact of the aerosols on operators.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding heads, in particular to a drive-control integrated digital handheld laser welding head. Background Art

[0002] The handheld laser welding head is a key welding equipment component. It integrates light emission, wire feeding and other auxiliary functions. It is the core tool of the handheld laser welding machine for welding operations. It is the welding head part that uses the laser beam for welding operations. It is usually composed of a handheld handle, a reflector, a welding wire channel, a nozzle and other components. It is an important part of the laser welding machine.

[0003] Traditional welding equipment generally needs to be fixed on a welding machine, and its scope of use is not only limited, but also occupies a large space, is heavy, inconvenient to use, and has complex tooling. At present, handheld welding heads have appeared on the market. The handheld welding heads are handle-type structures. Although the scope of use is no longer limited, they do not provide safety protection for operators, and they occupy a large space, which is inconvenient for welding smaller workpieces. In addition, since the handheld welding head does not have an effective cooling structure, when it works for a long time, the high temperature will affect the life of the lens and the safety of the operator.

[0004] Based on the above technical problems, the prior art also provides some solutions. For example, a Chinese patent with the authorization announcement number CN110238512A discloses a handheld laser welding head. The overall appearance structure of the present invention adopts an ergonomic design, has a simple structure, is easy to operate, and has a water cooling circulation pipeline built into the entire handheld welding head, which can fully cool the handheld welding head, thereby extending the service life of the handheld welding head and improving the comfort of use.

[0005] However, in actual production operations, the above-mentioned laser welding uses a high-energy laser beam to melt the materials and connect them together. This process generates a large amount of heat. The high heat will affect the stability of the operator during the holding process, and it is easy to cause discomfort to the operator, reducing the welding effect. At the same time, during the welding process, the metal surface material will evaporate gas and produce aerosols, which will affect the respiratory health of the surrounding operators. At the same time, the existing laser beam is difficult to correct and requires the use of external correction components for advance correction, which is more cumbersome. In addition, during the long-term operation of the handheld laser welding head, the transmission wire is affected by factors such as bending and stretching, and the shielding performance of the wire itself is reduced, resulting in interference with the analog signal transmission. Summary of the invention

[0006] The purpose of the present invention is to provide a digital handheld laser welding head with integrated drive and control, which solves the problem that the existing laser beam is difficult to correct as mentioned in the background technology and requires the use of external correction components for advance correction, which is rather cumbersome. In addition, during the long-term operation of the handheld laser welding head, the transmission wire is affected by factors such as bending and stretching, and the shielding performance of the wire itself is reduced, resulting in interference with the analog signal transmission. At the same time, the heat and aerosols generated are likely to affect the operator.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A drive-control integrated digital handheld laser welding head, comprising a welding head mechanism, the welding head mechanism comprising a welding head shell, a welding head body and an internal protective gas inlet, one side of the welding head shell is fixedly connected to the welding head body, one side of the welding head shell is provided with an internal protective gas inlet, one side of the welding head shell is threadedly connected to an external fastening screw, one side of the welding head shell is movably connected to a laser input interface, one side of the laser input interface is provided with a cooling medium inlet, one side of the cooling medium inlet is provided with a cooling medium outlet, and one side of the cooling medium outlet is provided with an external contact interface;

[0009] One of the welding head mechanisms is provided with a rear interface mechanism, and the rear interface mechanism is used to connect the welding head mechanism to an external device;

[0010] An exhaust mechanism is provided on one side of the welding head housing, and the exhaust mechanism is used to collect and discharge aerosol gas generated during the welding process.

[0011] Preferably, the exhaust mechanism includes a fixed frame, an inner connecting tube and a connecting frame, one side of the welding head shell is fixedly connected to the fixed frame, one side of the fixed frame is fixedly connected to the inner connecting tube, a connecting frame is opened on the surface of the inner connecting tube, the inner side of the connecting frame is fixedly connected to a heat conducting plate, the inner side of the heat conducting plate is fixedly connected to a transmission motor body, the output shaft of the transmission motor body is fixedly connected to a transmission rod, one end of the transmission rod is fixedly connected to a connecting disk, and one side of the connecting disk is fixedly connected to a transmission fan.

[0012] Preferably, a galvanometer motor driver is provided on one side of the welding head housing, a galvanometer motor body is provided on one side of the galvanometer motor driver, a communication control system body is provided on one side of the welding head housing, the rear interface mechanism includes a rear access outer shell, an external protective gas inlet and an internal contact interface, an anti-folding spring is movably connected to one side of the rear access outer shell, a cooling medium interface is provided on the other side of the rear access outer shell, a parallel laser beam is provided on one side of the cooling medium interface, a collimating lens is provided on one side of the parallel laser beam, an internal fastening screw is movably connected to the surface of the rear access outer shell, and a transmission cable is provided on the inner side of the anti-folding spring.

[0013] Preferably, the number of the fixing frames is two, and one side of the two fixing frames is respectively fixedly connected with an inner connecting tube and an outer protective sleeve, and one side of the outer protective sleeve is fixedly connected with a protective outer frame.

[0014] Preferably, a heat dissipation mechanism is provided on one side of the transmission rod, and the heat dissipation mechanism includes a connecting frame, an inner barrier ring and an outer transmission ring. The surface of the transmission rod is fixedly connected to the connecting frame, one side of the connecting frame is fixedly connected to the outer transmission ring, and the surface of the outer transmission ring is fixedly connected to a transmission fan.

[0015] Preferably, an inner barrier ring is fixedly connected to the surface of the connecting frame, the inner barrier ring is annular, and two sides of the inner barrier ring are respectively arranged on one side of the inner connecting tube and the outer protective sleeve.

[0016] Preferably, a transmission plate is fixedly connected to one side of the outer transmission ring, a cleaning brush is movably connected to one side of the transmission plate, there are two transmission plates, and the two transmission plates are symmetrically arranged along both sides of the transmission rod.

[0017] Preferably, a heat sink is fixedly connected to the outer side of the heat conducting sheet, and there are multiple heat sinks.

[0018] Preferably, one side of the protective outer frame is movably connected to an inner bearing disk, and one side of the inner bearing disk is movably connected to one side of the transmission fan.

[0019] Preferably, an exhaust pipe is fixedly connected to one side of the inner bearing disc, and the exhaust pipe is made of a copper pipe.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. The communication control system can control the swinging operation of the galvanometer motor body, establish communication with the host, and realize data interaction. At the same time, the signal transmission distance between the galvanometer motor driver and the galvanometer motor body of this handheld welding head is adjusted to 20mm, which solves the problem that the shielding performance of the wire itself is reduced due to factors such as bending and stretching of the transmission wire, resulting in interference in the analog signal transmission; at the same time, the rear interface mechanism integrates the four functions of laser transmission, cooling medium, protective gas, and communication power supply to achieve a four-in-one effect, realize the lightweight and miniaturization of the handheld head, and improve the portability during handheld operation;

[0022] 2. The transmission fan rotates along the inner side of the outer protective sleeve, which can draw in the aerosol generated during welding on one side of the welding head body. The aerosol and the hot gas will enter the inner connecting tube along the outer protective sleeve and be discharged along the exhaust pipe on one side of the inner connecting tube. The aerosol generated during welding can be drawn out in time, which improves the stability of the welding process and reduces the impact of the aerosol on the operator;

[0023] 3. The transmission motor body can be fixed by fixing the heat conductive sheet on the inner side of the connecting frame. At the same time, the heat conductive sheets attached to the two sides of the transmission motor body can be used to conduct the heat. The heat generated by the transmission motor body during operation is conducted to the surface of the heat sink through the heat conductive sheet. The heat dissipation effect of the heat conductive sheet can be improved by using multiple heat sinks, thereby improving the stability of the transmission motor body during operation;

[0024] 4. When the transmission motor drives the transmission rod to rotate, it will synchronously drive the connecting frame to rotate. The rotating connecting frame will drive the outer transmission ring to rotate along the outer side of the inner connecting tube. The rotating outer transmission ring will drive multiple transmission fans to rotate along the outer side of the inner connecting tube. The rotation of the transmission fan can generate wind to blow toward the surface of the exhaust pipe and the heat sink, which can improve the cooling effect of the heat sink.

[0025] 5. The high-temperature gas can be cooled by the curved exhaust pipe, and the continuously rotating transmission fan can generate wind to cool the exhaust pipe surface of the high thermal conductivity material, which can reduce the impact of the high-temperature gas generated during welding on the operator's hands, and at the same time reduce the impact of high temperature on the welding gun material, thereby extending the service life;

[0026] 6. The rotating outer transmission ring will drive the transmission plate to rotate, and the rotating transmission plate will drive the cleaning brush to rotate along the surface of the heat sink. The rotating cleaning brush will continuously clean the surface of the heat sink, which can improve the heat dissipation effect of the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the welding head structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal protective gas inlet structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the welding head shell of the present invention;

[0030] Figure 4 This is a schematic diagram of the rear access outer shell structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the anti-bending spring structure of the present invention;

[0032] Figure 6It is a schematic diagram of the structure of the welding head shell of the present invention;

[0033] Figure 7 It is a schematic diagram of the exhaust pipe structure of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the inner connecting tube of the present invention;

[0035] Fig. 9 It is a schematic diagram of the transmission rod structure of the present invention;

[0036] Fig.10 It is a schematic diagram of the protective outer frame structure of the present invention.

[0037] Among them: 1. Welding head mechanism; 101. Welding head shell; 102. Welding head body; 103. Inner protective gas inlet; 104. External fastening screw; 105. Laser input interface; 106. Cooling medium inlet; 107. Cooling medium outlet; 108. External contact interface; 109. Galvanometer motor driver; 1010. Galvanometer motor body; 1011. Communication control system body; 2. Rear interface mechanism; 201. Rear access shell body; 202. External protective gas inlet; 203. Internal contact interface; 204. Anti-bending spring; 205. Cooling medium interface; 206. Parallel laser beam; 207. Collimating lens; 208, inner fastening screws; 209, transmission cable; 3, exhaust mechanism; 301, fixing frame; 302, inner connecting tube; 303, connecting frame; 304, heat conducting plate; 305, heat sink; 306, transmission motor body; 307, transmission rod; 308, connecting plate; 309, transmission fan; 3010, outer protective sleeve; 3011, protective outer frame; 3012, inner bearing plate; 3013, exhaust pipe; 4, heat dissipation mechanism; 401, connecting frame; 402, inner barrier ring; 403, outer transmission ring; 404, transmission fan; 405, transmission plate; 406, cleaning brush. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-10A drive-control integrated digital handheld laser welding head comprises a welding head mechanism 1, wherein the welding head mechanism 1 comprises a welding head shell 101, a welding head body 102 and an inner shielding gas inlet 103, wherein one side of the welding head shell 101 is fixedly connected with the welding head body 102, one side of the welding head shell 101 is provided with an inner shielding gas inlet 103, one side of the welding head shell 101 is threadedly connected with an outer fastening screw 104, one side of the welding head shell 101 is movably connected with a laser input interface 105, one side of the laser input interface 105 is provided with a cooling medium inlet 106, one side of the cooling medium inlet 106 is provided with a cooling medium outlet 107, and one side of the cooling medium outlet 107 is provided with an outer contact point interface 108;

[0040] One of the welding head mechanisms 1 is provided with a rear interface mechanism 2, which is used to connect the welding head mechanism 1 to an external device;

[0041] An exhaust mechanism 3 is provided on one side of the welding head housing 101, and the exhaust mechanism 3 is used to collect and discharge aerosol gas generated during the welding process.

[0042] It should be noted that the swinging operation of the galvanometer motor body 1010 can be controlled through the communication control system body 1011, and communication can be established with the host to realize data interaction. At the same time, the signal transmission distance between this handheld welding head and the galvanometer motor body 1010 is adjusted to 20 mm through the galvanometer motor driver 109, which solves the problem of interference in analog signal transmission due to factors such as bending and stretching of the transmission wire and the reduction of the shielding performance of the wire itself.

[0043] In this embodiment, the exhaust mechanism 3 includes a fixed frame 301, an inner connecting tube 302 and a connecting frame 303. The fixed frame 301 is fixedly connected to one side of the welding head housing 101, the inner connecting tube 302 is fixedly connected to one side of the fixed frame 301, a connecting frame 303 is provided on the surface of the inner connecting tube 302, a heat conducting plate 304 is fixedly connected to the inner side of the connecting frame 303, a transmission motor body 306 is fixedly connected to the inner side of the heat conducting plate 304, the output shaft of the transmission motor body 306 is fixedly connected to a transmission rod 307, one end of the transmission rod 307 is fixedly connected to a connecting disk 308, and one side of the connecting disk 308 is fixedly connected to a transmission fan 309.

[0044] It should be noted that after starting the transmission motor body 306, the transmission motor body 306 can drive the transmission rod 307 to rotate, and the rotating transmission rod 307 will drive the connecting disk 308 to rotate. Through the connection of the connecting disk 308, the transmission fan 309 can be driven to rotate when the transmission rod 307 rotates, and the rotating transmission fan 309 can be supported by the inner bearing disk 3012.

[0045] In this embodiment, a galvanometer motor driver 109 is provided on one side of the welding head housing 101, a galvanometer motor body 1010 is provided on one side of the galvanometer motor driver 109, a communication control system body 1011 is provided on one side of the welding head housing 101, the rear interface mechanism 2 includes a rear access housing 201, an external protective gas inlet 202 and an internal contact interface 203, an anti-bending spring 204 is movably connected to one side of the rear access housing 201, a cooling medium interface 205 is provided on the other side of the rear access housing 201, a parallel laser beam 206 is provided on one side of the cooling medium interface 205, a collimating lens 207 is provided on one side of the parallel laser beam 206, an internal fastening screw 208 is movably connected to the surface of the rear access housing 201, a transmission cable 209 is provided on the inner side of the anti-bending spring 204, and the transmission cable 209 is used to connect with an external device. Conventional laser welding equipment can be selected for the external device, and the external device is not the key to the present invention.

[0046] It should be noted that by performing collimation correction on the laser on the same structure, errors caused by the structure can be avoided and the quality of the beam after collimation correction can be improved. At the same time, the four functions of laser transmission, cooling medium, protective gas, and communication power supply are integrated through the rear interface mechanism 2 to achieve a four-in-one effect, realize the lightweight and miniaturized application of the handheld head, and improve the portability during handheld operation.

[0047] In this embodiment, there are two fixing frames 301 , and one side of the two fixing frames 301 is fixedly connected to the inner connecting tube 302 and the outer protective sleeve 3010 , respectively, and one side of the outer protective sleeve 3010 is fixedly connected to the protective outer frame 3011 .

[0048] It should be noted that the outer protective sleeve 3010 and the inner connecting tube 302 can be stably fixed by the two fixing frames 301 .

[0049] In this embodiment, a heat dissipation mechanism 4 is provided on one side of the transmission rod 307, and the heat dissipation mechanism 4 includes a connecting frame 401, an inner barrier ring 402 and an outer transmission ring 403. The surface of the transmission rod 307 is fixedly connected to the connecting frame 401, one side of the connecting frame 401 is fixedly connected to the outer transmission ring 403, and the surface of the outer transmission ring 403 is fixedly connected to the transmission fan 404.

[0050] It should be noted that the rotating outer transmission ring 403 will drive multiple transmission fans 404 to rotate along the outer side of the inner connecting tube 302. The rotation of the transmission fan 404 can generate wind to blow toward the surface of the exhaust pipe 3013 and the heat sink 305, thereby improving the cooling effect of the heat sink 305. At the same time, after the high-temperature gas is drawn into the exhaust pipe 3013 by the transmission fan 309, the high-temperature gas can be cooled through the curved exhaust pipe 3013. At the same time, the continuously rotating transmission fan 404 can generate wind to cool the surface of the exhaust pipe 3013 made of high thermal conductivity material.

[0051] In this embodiment, an inner barrier ring 402 is fixedly connected to the surface of the connecting frame 401 . The inner barrier ring 402 is annular, and two sides of the inner barrier ring 402 are respectively arranged on one side of the inner connecting tube 302 and the outer protective sleeve 3010 .

[0052] It should be noted that the rotating connecting frame 401 will drive the inner barrier ring 402 to rotate. The rotating inner barrier ring 402 rotates along one side of the inner connecting tube 302 and the outer protective sleeve 3010, which can keep the gas entering the outer protective sleeve 3010 flowing normally into the inner connecting tube 302.

[0053] In this embodiment, a transmission plate 405 is fixedly connected to one side of the outer transmission ring 403, and a cleaning brush 406 is movably connected to one side of the transmission plate 405. There are two transmission plates 405, and the two transmission plates 405 are symmetrically arranged along both sides of the transmission rod 307.

[0054] It should be noted that the rotating outer transmission ring 403 will drive the transmission plate 405 to rotate, and the rotating transmission plate 405 will drive the cleaning brush 406 to rotate along the surface of the heat sink 305. The rotating cleaning brush 406 will continuously clean the surface of the heat sink 305, thereby improving the heat dissipation effect of the heat sink 305.

[0055] In this embodiment, a heat sink 305 is fixedly connected to the outer side of the heat conducting sheet 304 , and there are multiple heat sinks 305 .

[0056] It should be noted that the rotating transmission plate 405 will drive the cleaning brush 406 to rotate along the surface of the heat sink 305 , and the rotating cleaning brush 406 will continuously clean the surface of the heat sink 305 , thereby improving the heat dissipation effect of the heat sink 305 .

[0057] In this embodiment, one side of the protective outer frame 3011 is movably connected to the inner bearing disk 3012 , and one side of the inner bearing disk 3012 is movably connected to one side of the transmission fan 309 .

[0058] It should be noted that when the transmission rod 307 rotates, the transmission fan 309 is driven to rotate. The rotating transmission fan 309 can be supported by the inner bearing disk 3012, thereby improving the rotation stability of the transmission fan 309.

[0059] In this embodiment, an exhaust pipe 3013 is fixedly connected to one side of the inner bearing disc 3012, and the exhaust pipe 3013 is made of a copper tube.

[0060] It should be noted that the high-temperature gas can be cooled by the curved exhaust pipe 3013, and the continuously rotating transmission fan 404 can generate wind to cool the surface of the exhaust pipe 3013 of the high thermal conductivity material, thereby reducing the impact of the high-temperature gas generated during welding on the operator's hands, and reducing the impact of high temperature on the welding gun material, thereby extending the service life.

[0061] The specific working steps of a drive-control integrated digital handheld laser welding head are as follows:

[0062] The swinging operation of the galvanometer motor body 1010 can be controlled by the communication control system body 1011, and communication can be established with the host to realize data interaction. At the same time, the signal transmission distance between the handheld welding head and the galvanometer motor body 1010 is adjusted to 20 mm through the galvanometer motor driver 109, which solves the problem that the transmission wire is affected by bending and stretching, and the shielding performance of the wire itself is reduced, resulting in interference in the analog signal transmission; when in use, after disassembly, it is connected to the outer shell 201, and after loosening the internal fastening screws 208, the laser output by the laser input interface 105 is a parallel beam after collimation correction, which can be used directly for the handheld head. By collimating the laser on the same structure, the error caused by the structure can be avoided, and the quality of the beam after collimation correction can be improved. At the same time, the four functions of laser transmission, cooling medium, protective gas, and communication power supply are integrated through the rear interface mechanism 2 to achieve a four-in-one effect, realize the lightweight and miniaturization of the handheld head, and improve The portability during handheld operation is improved; after starting the transmission motor body 306, the transmission motor body 306 can be used to drive the transmission rod 307 to rotate, and the rotating transmission rod 307 will drive the connecting disk 308 to rotate. Through the connection of the connecting disk 308, the transmission fan 309 can be driven to rotate when the transmission rod 307 rotates. The rotating transmission fan 309 can be supported by the inner bearing disk 3012, thereby improving the rotation stability of the transmission fan 309. The transmission fan 309 rotates along the inner side of the outer protective sleeve 3010, and the aerosol generated during welding on one side of the welding head body 102 can be drawn in. The aerosol and the gas with heat will enter the inner connecting tube 302 along the outer protective sleeve 3010, and be discharged along the exhaust pipe 3013 on one side of the inner connecting tube 302, so that the aerosol generated during the welding process can be timely drawn out, thereby improving the stability during the welding process and reducing the impact of the aerosol on the operator;

[0063] At the same time, when the transmission motor body 306 is working, the transmission motor body 306 can be fixed by fixing the heat conductive sheet 304 on the inner side of the connecting frame 303. At the same time, the heat conductive sheet 304 attached to the two sides of the transmission motor body 306 can be used to conduct heat. The heat generated during the operation of the transmission motor body 306 is conducted to the surface of the heat sink 305 through the heat conductive sheet 304. The heat dissipation effect of the heat conductive sheet 304 can be improved by using multiple heat sinks 305, thereby improving the stability of the transmission motor body 306 during operation; when the transmission motor body 306 drives the transmission rod 307 to rotate, the connecting frame 401 will be driven to rotate synchronously. The rotating connecting frame 401 will drive the outer transmission ring 403 to rotate along the outer side of the inner connection tube 302. The rotating outer transmission ring 403 will drive multiple transmission fans 404 to rotate along the outer side of the inner connection tube 302. The rotation of the transmission fan 404 can generate wind to blow to the exhaust pipe 3013 and the surface of the heat sink 305, which can improve the cooling effect of the heat sink 305. At the same time, ... the high-temperature air After the body is drawn into the exhaust pipe 3013 by the transmission fan 309, the high-temperature gas can be cooled through the curved exhaust pipe 3013, and the continuously rotating transmission fan 404 can generate wind to cool the surface of the exhaust pipe 3013 of the high thermal conductivity material, which can reduce the impact of the high-temperature gas generated during welding on the operator's hands, and at the same time reduce the impact of high temperature on the welding gun material, thereby extending the service life; at the same time, the rotating connecting frame 401 will drive the inner barrier ring 402 to rotate, and the rotating inner barrier ring 402 rotates along one side of the inner connecting tube 302 and the outer protective sleeve 3010, which can keep the gas entering the outer protective sleeve 3010 flowing normally into the inner connecting tube 302, and at the same time, the rotating outer transmission ring 403 will drive the transmission plate 405 to rotate, and the rotating transmission plate 405 will drive the cleaning brush 406 to rotate along the surface of the heat sink 305, and the rotating cleaning brush 406 will continuously clean the surface of the heat sink 305, which can improve the heat dissipation effect of the heat sink 305.

[0064] It should be noted that the parts not described in detail in the present invention are all prior art, and corresponding models can be selected according to actual needs. The internal structure and operating principle of the above parts are also common knowledge of those skilled in the art, and no further elaboration will be given on this.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital handheld laser welding head with integrated drive and control, comprising a welding head mechanism (1), characterized in that: The welding head mechanism (1) comprises a welding head shell (101), a welding head body (102) and an internal protective gas inlet (103); one side of the welding head shell (101) is fixedly connected to the welding head body (102); one side of the welding head shell (101) is provided with an internal protective gas inlet (103); one side of the welding head shell (101) is threadedly connected to an external fastening screw (104); one side of the welding head shell (101) is movably connected to a laser input interface (105); one side of the laser input interface (105) is provided with a cooling medium inlet (106); one side of the cooling medium inlet (106) is provided with a cooling medium outlet (107); and one side of the cooling medium outlet (107) is provided with an external contact interface (108); A rear interface mechanism (2) is provided on one side of the welding head mechanism (1), and the rear interface mechanism (2) is used to connect the welding head mechanism (1) to an external device; An exhaust mechanism (3) is provided on one side of the welding head housing (101), and the exhaust mechanism (3) is used to collect and discharge aerosol gas generated during welding. The exhaust mechanism (3) comprises a fixing frame (301), an inner connecting tube (302) and a connecting frame (303). The fixing frame (301) is fixedly connected to one side of the welding head housing (101), and the inner connecting tube (302) is fixedly connected to one side of the fixing frame (301). The connecting frame (303) is provided on the surface of the inner connecting tube (302). 03), a heat conducting sheet (304) is fixedly connected to the inner side of the connecting frame (303), a transmission motor body (306) is fixedly connected to the inner side of the heat conducting sheet (304), a transmission rod (307) is fixedly connected to the output shaft of the transmission motor body (306), one end of the transmission rod (307) is fixedly connected to a connection disk (308), one side of the connection disk (308) is fixedly connected to a transmission fan (309), a heat dissipation mechanism (4) is provided on one side of the transmission rod (307), and the heat dissipation mechanism ( 4) comprises a connecting frame (401), an inner barrier ring (402) and an outer transmission ring (403), the surface of the transmission rod (307) is fixedly connected to the connecting frame (401), one side of the connecting frame (401) is fixedly connected to the outer transmission ring (403), the surface of the outer transmission ring (403) is fixedly connected to the transmission fan (404), the surface of the connecting frame (401) is fixedly connected to the inner barrier ring (402), the inner barrier ring (402) is annular, and the two sides of the inner barrier ring (402) are respectively Arranged on one side of the inner connecting tube (302) and the outer protective sleeve (3010), one side of the outer transmission ring (403) is fixedly connected to a transmission plate (405), one side of the transmission plate (405) is movably connected to a cleaning brush (406), there are two transmission plates (405), and the two transmission plates (405) are symmetrically arranged along the two sides of the transmission rod (307), the outer side of the heat conductive plate (304) is fixedly connected to a heat sink (305), and there are multiple heat sinks (305).

2. The drive-control integrated digital handheld laser welding head according to claim 1, characterized in that: A galvanometer motor driver (109) is provided on one side of the welding head housing (101), a galvanometer motor body (1010) is provided on one side of the galvanometer motor driver (109), a communication control system body (1011) is provided on one side of the welding head housing (101), the rear interface mechanism (2) comprises a rear access housing (201), an external protective gas inlet (202) and an internal contact interface (203), an anti-bending spring (204) is movably connected to one side of the rear access housing (201), a cooling medium interface (205) is provided on the other side of the rear access housing (201), a parallel laser beam (206) is provided on one side of the cooling medium interface (205), a collimating lens (207) is provided on one side of the parallel laser beam (206), an internal fastening screw (208) is movably connected to the surface of the rear access housing (201), and a transmission cable (209) is provided on the inner side of the anti-bending spring (204).

3. The drive-control integrated digital handheld laser welding head according to claim 2, characterized in that: The number of the fixing frames (301) is two, and one side of the two fixing frames (301) is respectively fixedly connected to an inner connecting tube (302) and an outer protective sleeve (3010), and one side of the outer protective sleeve (3010) is fixedly connected to a protective outer frame (3011).

4. The drive-control integrated digital handheld laser welding head according to claim 3, characterized in that: One side of the protective outer frame (3011) is movably connected to an inner bearing disc (3012), and one side of the inner bearing disc (3012) is movably connected to one side of the transmission fan (309).

5. The drive-control integrated digital handheld laser welding head according to claim 4, characterized in that: An exhaust pipe (3013) is fixedly connected to one side of the inner bearing disc (3012), and the exhaust pipe (3013) is made of a copper pipe.

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