Coaxial laser welding device

Abstract

The utility model discloses a coaxial laser welding device, which relates to the technical field of laser welding equipment and comprises a base, a laser mechanism, a visual positioning mechanism and a blowing mechanism. The laser mechanism is arranged on the base; the visual positioning mechanism is arranged on the base, the visual positioning mechanism and the laser mechanism are arranged at an interval, and the visual detection mechanism is used for forming detection sight to detect the laser machining condition of a workpiece to be machined; the detection sight line and the welding laser are coaxially arranged; the blowing mechanism is arranged on the base and is spaced from the laser mechanism and the visual inspection mechanism; the blowing mechanism is used for blowing away smoke generated in the welding process of the laser mechanism. According to the technical scheme, the detection sight line of the visual positioning mechanism and the welding laser of the laser mechanism are coaxially arranged, products are welded in a static mode, the error influence caused by movement of the products is reduced, and the welding precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing equipment, in particular to a coaxial laser welding device. Background Art

[0002] In the existing industrial manufacturing and inspection technologies, the combination of visual inspection systems and laser generators is increasingly widely used. In traditional methods, the installation of visual inspection systems and laser generators often has the problem of misalignment of the axes, which causes the entire system to occupy a large space, and during the processing, the deviation of the axes affects the processing accuracy. In addition, this misalignment configuration also brings inconvenience in equipment maintenance and debugging, increases production costs, and reduces production efficiency. Utility Model Content

[0003] The main purpose of the utility model is to propose a coaxial laser welding device, which aims to coaxially set the detection line of sight of a visual inspection mechanism and the welding laser of a laser mechanism, which does not affect the welding of the workpiece by the laser mechanism and at the same time expands the detection range of the visual inspection mechanism, thereby improving the detection effect of the visual inspection mechanism.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a coaxial laser welding device, which comprises:

[0005] Base;

[0006] A laser mechanism, which is disposed on the base and is used to emit welding laser;

[0007] A visual inspection mechanism, the visual inspection mechanism is disposed on the base and spaced apart from the laser mechanism, the visual inspection mechanism is used to form a detection line of sight to detect the laser processing of the workpiece being processed; and the detection line of sight is coaxially arranged with the welding laser; and

[0008] An air blowing mechanism is arranged on the base and is spaced apart from the laser mechanism and the visual detection mechanism; the air blowing mechanism is used to blow away the smoke generated during the welding process of the laser mechanism.

[0009] In one embodiment, the blowing mechanism comprises:

[0010] A blow gun fixed to the base and facing the position where the laser mechanism welds the workpiece; and

[0011] An air pump is arranged on the base and adjacent to the laser mechanism; the air pump is connected to the air cylinder; the air pump is used to change the air pressure of the air cylinder to blow away the smoke generated by the laser mechanism.

[0012] In one embodiment, the blow tube is a flared blow tube.

[0013] In one embodiment, the inner wall of the air cylinder is provided with a plurality of guide grooves, and the plurality of guide grooves are arranged at intervals along the periphery of the air cylinder.

[0014] In one embodiment, the blowing mechanism further comprises a gas supply assembly disposed on the base, wherein the gas supply assembly is connected to the blowing cylinder and is used for blowing nitrogen into the blowing cylinder.

[0015] In one embodiment, the gas supply assembly comprises:

[0016] a nitrogen supply tank, the nitrogen supply tank being disposed on the base; and

[0017] At least one shunt pipe, one end of which is connected to the nitrogen supply tank, and the other end of which is connected to the blowing cylinder.

[0018] In one embodiment, the coaxial laser welding device also includes an exhaust mechanism, which includes an exhaust pipe and an exhaust pump connected to the exhaust pipe, the exhaust pump and the exhaust pipe are arranged on the base, and are spaced apart from the visual inspection mechanism and the laser mechanism; the exhaust pipe has an end away from the exhaust pump toward the position where the laser mechanism welds the workpiece.

[0019] In one embodiment, the laser mechanism includes a galvanometer, a laser folding mirror and a laser, the galvanometer is fixed to the base, the laser folding mirror is arranged on the galvanometer and located on one side of the galvanometer; the laser is connected to the laser folding mirror and arranged at intervals with the galvanometer; the laser folding mirror is used to change the emission angle of the laser generated by the laser so that the laser enters the galvanometer.

[0020] In one embodiment, the laser mechanism further includes a field lens, which is connected to an end of the galvanometer mirror away from the laser folding mirror and is used to amplify the laser emitted from the galvanometer mirror.

[0021] In one embodiment, the laser mechanism further includes a beam combining lens, which is connected to the outer wall of the field lens and is used to combine the laser emitted from the field lens with the detection line of sight of the visual detection mechanism.

[0022] The coaxial laser welding device of the technical solution of the utility model includes a base, a laser mechanism, a visual detection mechanism and an air blowing mechanism; the laser mechanism is arranged on the base, and is used to emit a welding laser; the visual detection mechanism is arranged on the base, and is spaced apart from the laser mechanism, and the visual detection mechanism is used to form a detection line of sight to detect the laser processing of the workpiece being processed; and the detection line of sight is arranged coaxially with the welding laser; the air blowing mechanism is arranged on the base, and is spaced apart from the laser mechanism and the visual detection mechanism; the air blowing mechanism is used to blow away the smoke generated during the welding process of the laser mechanism. Since the detection line of sight of the visual detection mechanism in the device is coaxially arranged with the welding laser of the laser mechanism, the installation space occupied by the visual detection mechanism and the laser mechanism in the coaxial laser welding device can be greatly reduced, thereby reducing the volume of the coaxial laser welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a structural schematic diagram of an embodiment of a coaxial laser welding device provided by the utility model.

[0025] Description of Figure Numbers:

[0026] 10. Laser mechanism; 11. Galvanometer; 12. Laser return mirror; 13. Laser; 14. Field mirror;

[0027] 15. Beam combining lens; 20. Visual inspection mechanism; 30. Air blowing mechanism; 40. Air exhaust mechanism; 1. The inspection optical path is coaxial with the welding laser optical path.

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] The utility model provides a coaxial laser welding device.

[0033] See also Figure 1 In one embodiment of the utility model, the coaxial laser welding device includes a base, a laser mechanism 10, a visual detection mechanism 20 and a blowing mechanism 30; the laser 13 is arranged on the base, and is used to emit welding laser; the visual detection mechanism 20 is arranged on the base, and is spaced apart from the laser mechanism 10, and the visual detection mechanism 20 is used to form a detection line of sight to detect the laser processing status of the workpiece to be processed; and the detection line of sight is coaxially arranged with the welding laser; the blowing mechanism 30 is arranged on the base, and is spaced apart from the laser mechanism 10 and the visual detection mechanism 20; the blowing mechanism 30 is used to blow away the smoke generated during the welding process of the laser mechanism 10.

[0034] In this embodiment, the detection line of sight of the visual inspection mechanism 20 is arranged coaxially with the welding laser of the laser mechanism 10, and the visual inspection mechanism 20 is arranged at a position spaced a certain distance from the laser mechanism 10. In this way, when the position of the laser mechanism 10 welding the workpiece can be coaxially arranged with the detection line of sight of the visual inspection mechanism 20, it is convenient for the visual inspection mechanism 20 to detect the welding condition of the workpiece. At the same time, the detection line of sight of the visual inspection mechanism 20 does not need to pass through the laser mechanism 10, so that the detection range of the detection line of sight of the visual inspection mechanism 20 is wider and is not restricted by the laser mechanism 10, thereby improving the detection effect of the visual inspection mechanism 20. At the same time, an air blowing mechanism 30 is provided on the base, and the air blowing mechanism 30 is used to blow away the smoke generated when the welding laser emitted by the laser mechanism 10 welds the workpiece, so as to avoid the smoke hindering the visual inspection mechanism 20 from performing visual inspection, thereby improving the detection effect of the visual inspection mechanism 20. Refer to Figure 1 , label 1 is the coaxial optical path of the detection optical path and the welding laser.

[0035] During the processing, the visual inspection mechanism 20 can monitor the laser processing of the workpiece in real time and adjust the parameters of the laser 13 in time to ensure the processing quality, greatly improve the processing accuracy, and effectively improve the product quality and production efficiency. The visual inspection mechanism 20 monitors the surface of the workpiece in real time and obtains the surface information of the workpiece. The data obtained by the visual inspection mechanism 20 is transmitted to the data processing system, and the data is analyzed and processed to obtain the quality evaluation of the workpiece.

[0036] Specifically, the workpiece to be processed is placed on the base, and the position of the workpiece is adjusted so that it is within the processing range of the laser 13 and the visual inspection mechanism 20; the visual inspection mechanism 20 is turned on, so that the camera can clearly capture the processing area of ​​the workpiece in real time; the laser 13 is started, so that the laser 13 performs laser processing according to the preset processing parameters; at the same time, the blowing mechanism 30 is turned on, and the smoke generated by the laser 13 during laser processing is blown away in time by the blowing mechanism 30, while the visual inspection mechanism 20 monitors the processing situation in real time. If there is any abnormality, an alarm is immediately issued and the laser 13 stops processing. After the workpiece processing is completed, the laser 13, the visual inspection mechanism 20 and the blowing mechanism 30 are turned off, and the workpiece is taken out.

[0037] In order to ensure that the visual inspection mechanism 20 is not affected by the smoke generated during the processing of the laser 13, the blowing mechanism 30 on the base is started so that the blowing mechanism 30 can effectively blow away the smoke generated during the laser processing. This not only ensures the cleanliness of the operating environment, reduces the pollution of smoke to the internal optical elements of the laser 13 and the visual inspection mechanism 20, and extends the service life of the equipment, but also provides a safer working environment for operators.

[0038] Optionally, the base of the coaxial laser welding device is made of aluminum alloy material, which has high stability and strength. The base is provided with mounting holes for mounting the laser 13, the visual detection mechanism 20 and the blowing mechanism 30.

[0039] Optionally, the laser 13 is located at the center of the base and uses a 500W fiber laser 13. The laser 13 is connected to the controller via an optical fiber to achieve precise control of the laser processing process.

[0040] Optionally, the visual inspection mechanism 20 includes a high-definition camera, a light source and an image processing unit. The camera collects images of the laser processing area in real time, and the image processing unit analyzes the processing conditions to ensure the processing quality.

[0041] In one embodiment, see Figure 1 The blowing mechanism 30 includes an air cylinder and an air pump. The air cylinder is arranged on the base and is arranged toward the laser 13; the air pump is arranged on the base and is adjacent to the laser mechanism 10; the air pump is connected to the air cylinder; the air pump is used to change the air pressure of the air cylinder to blow away the smoke generated by the laser mechanism 10.

[0042] The air blow cylinder is arranged on the base, and is arranged toward the direction of the laser mechanism 10. The air blow pump is arranged on the base, and is arranged adjacent to the laser mechanism 10. The air blow pump is connected to the air blow cylinder through a flexible air pipe. The air blow pump is used to change the air pressure of the air blow cylinder. When the laser mechanism 10 is working, the air blow pump is started, and the air flow generated enters the air blow cylinder through the flexible air pipe, and blows away the smoke generated by the laser mechanism 10, so as to ensure the normal operation of the laser mechanism 10 and the visual detection mechanism 20.

[0043] The blowing mechanism 30 of the utility model greatly improves the blowing efficiency by reasonably arranging the blowing cylinder and the blowing pump on the base and arranging them toward the laser mechanism 10, and effectively blows away the smoke generated by the laser mechanism 10 during the processing.

[0044] The connection between the air pump and the air cylinder can adjust the air pressure in real time according to the amount of smoke generated by the laser 13, ensuring the continuity and stability of the air blowing. This flexible air pressure adjustment mechanism not only improves the efficiency of smoke removal, but also saves energy and reduces energy consumption compared to the air blowing device with fixed air pressure in the prior art.

[0045] Optionally, a plurality of guide blades are provided inside the air cylinder to cause the air flow to rotate inside the air cylinder, thereby enhancing the blowing effect.

[0046] Optionally, the air pump is controlled by an intelligent controller to automatically adjust the air pressure according to the working state of the laser 13, thereby achieving energy saving and extending the service life of the equipment.

[0047] Optionally, the base can be made of aluminum alloy material, which has high stability and strength. The air pump can be a micro air pump, which is easy to control and has low noise. The flexible air pipe can be made of high temperature resistant and wear resistant materials to adapt to the working environment of the laser 13.

[0048] In one embodiment, see Figure 1 , the air blower is a flared air blower.

[0049] Specifically, the end of the air blow tube facing the laser mechanism 10 is a flared end. With this arrangement, a large amount of high-pressure air from the air pump is blown to the laser mechanism 10 through the flared end of the air blow tube, thereby increasing the blowing volume of the air blow tube and greatly accelerating the blowing effect of the air blow mechanism 30, so that there will be no smoke interference when the laser mechanism 10 is running.

[0050] The blowpipe of the utility model is designed to be flared, which effectively increases the blowing area of ​​the blowpipe and significantly improves the blowing efficiency. During use, the user can complete the blowing work with lower energy consumption and shorter time, thereby improving work efficiency. During the blowing process, the traditional blowpipe is prone to excessive local force due to the fast air flow speed, which in turn causes damage. The flared design of the utility model makes the air flow more evenly distributed during the blowing process, reduces the risk of damage to the blowpipe, and extends its service life.

[0051] Optionally, the blowing tube may also be made of a flexible material so that the blowing tube can be deformed appropriately during the blowing process, thereby minimizing the noise of the blowing mechanism 30 during operation.

[0052] In one embodiment, see Figure 1 The inner wall of the air cylinder is provided with a plurality of guide grooves, and the plurality of guide grooves are arranged at intervals along the periphery of the air cylinder.

[0053] Specifically, each guide groove is extended along the height direction of the inner wall of the air cylinder, and multiple guide grooves are arranged at intervals along the periphery of the air cylinder. With this arrangement, when high-pressure air enters the air cylinder, the high-pressure air can move in an orderly manner along the guide grooves on the air cylinder, and air flow turbulence is not likely to occur.

[0054] The design of the guide groove makes the air flow smoother during the blowing process, improving the blowing efficiency. At the same time, the guide groove can make the air flow rotate on the inner wall of the air tube, reducing the impact of the air flow on the inner wall of the air tube and reducing noise.

[0055] The inner wall of the blow tube is provided with a plurality of guide grooves, which are arranged at intervals along the periphery of the blow tube. Four guide grooves are provided on the inner wall of the blow tube. The number and intervals of the guide grooves can be adjusted according to actual needs. In this embodiment, the four guide grooves are evenly distributed along the periphery of the blow tube, and have a good guide effect. In order to facilitate manufacturing and installation, the guide grooves can be formed by die stamping or laser cutting. The depth and width of the grooves can be adjusted according to the diameter of the blow tube and the required guide effect.

[0056] In one embodiment, see Figure 1 The blowing mechanism 30 also includes a gas supply assembly disposed on the base, and the gas supply assembly is connected to the blowing cylinder and is used to blow inert gas into the blowing cylinder.

[0057] This technical solution can achieve rapid and uniform gas supply through the setting of the gas supply component, effectively improve the filling speed of the gas in the blow tube, and thus improve the overall work efficiency. Due to the design of the gas supply component, it can reduce the loss of gas during transportation, reduce energy consumption, and help achieve the goal of energy conservation and emission reduction. The inert gas used in this technical solution has the characteristics of high stability and is not easy to react with other substances, which is conducive to improving product quality and reducing finished product defects caused by gas reactions.

[0058] In one embodiment, see Figure 1 The gas supply assembly includes a nitrogen supply tank and at least one shunt pipe, the nitrogen supply tank is arranged on the base; one end of the shunt pipe is connected to the nitrogen supply tank, and the other end of the shunt pipe is connected to the blowing cylinder.

[0059] The nitrogen supply tank is installed on the base, which is used to support the entire gas supply assembly to ensure its stability. The nitrogen supply tank is used to store nitrogen to prevent active gases such as oxygen from reacting with the working material. One end of the shunt pipe is connected to the nitrogen supply tank, and the other end is connected to the blowpipe. The blowpipe receives nitrogen from the shunt pipe and blows it to the working area to achieve protection.

[0060] The gas supply assembly of the utility model realizes efficient supply and distribution of gas by providing a nitrogen supply tank and at least one shunt pipe. Since the nitrogen supply tank is arranged on the base, the stability of the gas supply system is ensured, and the problem of unstable gas supply caused by equipment vibration is reduced, thereby significantly improving the efficiency of gas supply. The introduction of the shunt pipe optimizes the distribution of the airflow, so that the gas can be evenly delivered to the blowpipe.

[0061] Optionally, the material of the nitrogen supply tank is preferably stainless steel to enhance its corrosion resistance and pressure resistance.

[0062] Optionally, the material of the shunt pipe is polytetrafluoroethylene, which has good high temperature resistance and corrosion resistance. The number of shunt pipes can be adjusted according to actual needs to achieve the distribution of gas flow.

[0063] In another embodiment, the gas supply assembly includes a gas source, a gas regulating valve and a connecting pipe, the gas source provides inert gas, the gas regulating valve is used to adjust the gas flow, and the connecting pipe transports the gas from the gas supply assembly to the blow tube. The blow tube is made of transparent polycarbonate material, which is convenient for observing the internal gas flow. One end of the blow tube is connected to the connecting pipe of the gas supply assembly, and the other end is provided with a gas discharge port for discharging the gas after blowing. During the operation, the gas source is first turned on, and the gas flow is adjusted by the gas regulating valve so that the gas enters the blow tube smoothly. During the blowing process, the operator can adjust the gas flow as needed to ensure the blowing effect.

[0064] In one embodiment, see Figure 1 The coaxial laser welding device also includes an exhaust mechanism 40, which includes an exhaust pipe and an exhaust pump connected to the exhaust pipe. The exhaust pump and the exhaust pipe are arranged on the base and are spaced apart from the visual inspection mechanism 20 and the laser mechanism 10; the end of the exhaust pipe away from the exhaust pump is oriented toward the position where the laser mechanism 10 welds the workpiece.

[0065] The exhaust pump and the exhaust pipe are arranged on the base, which is conducive to improving the stability of the device. The exhaust pipe is away from the exhaust pump and faces the position of the laser mechanism 10 welding the workpiece, which is convenient for timely extracting the exhaust gas, smoke and other harmful substances generated during the welding process, reducing the impact on the environment and operators.

[0066] The provision of the exhaust mechanism 40 can effectively solve the problem of smoke and exhaust gas emission generated during welding in the prior art. In welding operations, timely removal of smoke and exhaust gas is essential to protect the health of operators and maintain a clean working environment. Through the exhaust pipe and exhaust pump in the device, harmful gases and particles generated during welding can be quickly extracted, greatly improving the working environment and reducing the risk of occupational diseases.

[0067] Secondly, the design of the exhaust mechanism 40 ensures that the device maintains high-efficiency welding while ensuring uniform heating of the welded workpiece. Since the end of the exhaust pipe away from the exhaust pump is toward the welded workpiece, such a layout helps to accelerate the cooling of the welding area, reduce defects such as welding deformation and glass warping caused by uneven heating, and thus significantly improve the welding quality and yield rate.

[0068] In one embodiment, see Figure 1The laser mechanism 10 includes a galvanometer 11, a laser folding mirror 12 and a laser 13. The galvanometer 11 is fixed to a base, and the laser folding mirror 12 is arranged on the galvanometer 11 and is located on one side of the galvanometer 11; the laser 13 is connected to the laser folding mirror 12 and is arranged at intervals with the galvanometer 11; the laser folding mirror 12 is used to change the emission angle of the laser generated by the laser 13 so that the laser enters the galvanometer 11.

[0069] The laser mechanism 10 effectively improves the accuracy and efficiency of laser emission through the innovative layout of the galvanometer 11 and the laser return mirror 12. Due to the fixed stability of the galvanometer 11 and the precise positioning of the laser return mirror 12, the laser can accurately change the emission angle and then efficiently enter the galvanometer 11. This is significantly better than the laser path deviation and inefficiency problems caused by unreasonable structural design in the prior art. Secondly, the structural design of the laser mechanism 10 is conducive to improving the accuracy and range of laser operations. Due to the spaced arrangement between the laser 13 and the laser return mirror 12, it is possible to effectively control the operating range while ensuring the laser power, thereby greatly improving the processing accuracy.

[0070] In one embodiment, see Figure 1 The laser mechanism 10 further includes a field lens 14 , which is connected to an end of the galvanometer mirror 11 away from the laser return mirror 12 and is used to amplify the laser emitted from the galvanometer mirror 11 .

[0071] By introducing the field lens 14, the laser emitted from the galvanometer 11 can be effectively amplified, making the laser irradiation more concentrated, greatly improving the accuracy and efficiency of laser processing. Compared with the prior art, the utility model can obtain higher processing quality and faster processing speed under the same laser energy input.

[0072] In one embodiment, see Figure 1 The laser mechanism 10 also includes a beam combining lens 15 , which is connected to the outer wall of the field lens 14 and is used to combine the laser emitted from the field lens 14 with the detection line of sight of the visual detection mechanism 20 .

[0073] By adding a beam combining lens 15 based on the existing technology and connecting it to the outer wall of the field lens 14, the laser beam is combined with the visual detection mechanism 20. The design of the beam combining lens 15 enables the laser and the visual detection system to share an optical path, reducing the size and complexity of the equipment and facilitating installation and maintenance. Since the laser beam is combined with the detection line of sight, the processing process can be monitored in real time and the laser parameters can be adjusted in time, thereby ensuring the processing accuracy and improving the processing efficiency.

[0074] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A coaxial laser welding device, characterized in that: The coaxial laser welding device comprises: Base; A laser mechanism, which is disposed on the base and is used to emit welding laser; A visual inspection mechanism, the visual inspection mechanism is disposed on the base and spaced apart from the laser mechanism, the visual inspection mechanism is used to form a detection line of sight to detect the laser processing of the workpiece being processed; and the detection line of sight is coaxially arranged with the welding laser; and An air blowing mechanism is arranged on the base and is spaced apart from the laser mechanism and the visual detection mechanism; the air blowing mechanism is used to blow away the smoke generated during the welding process of the laser mechanism.

2. The coaxial laser welding device according to claim 1, characterized in that: The blowing mechanism comprises: A blow gun fixed to the base and facing the position where the laser mechanism welds the workpiece; and An air pump is arranged on the base and adjacent to the laser mechanism; the air pump is connected to the air cylinder; the air pump is used to change the air pressure of the air cylinder to blow away the smoke generated by the laser mechanism.

3. The coaxial laser welding device according to claim 2, characterized in that: The blowing cylinder is a flared blowing cylinder.

4. The coaxial laser welding device according to claim 2, characterized in that: The inner wall of the air cylinder is provided with a plurality of guide grooves, and the plurality of guide grooves are arranged at intervals along the periphery of the air cylinder.

5. The coaxial laser welding device according to claim 2, characterized in that: The blowing mechanism further comprises a gas supply assembly arranged on the base, wherein the gas supply assembly is communicated with the blowing cylinder and is used for blowing nitrogen into the blowing cylinder.

6. The coaxial laser welding device according to claim 5, characterized in that: The gas supply assembly comprises: a nitrogen supply tank, the nitrogen supply tank being disposed on the base; and At least one shunt pipe, one end of which is connected to the nitrogen supply tank, and the other end of which is connected to the blowing cylinder.

7. The coaxial laser welding device according to claim 1, characterized in that: The coaxial laser welding device also includes an exhaust mechanism, which includes an exhaust pipe and an exhaust pump connected to the exhaust pipe, the exhaust pump and the exhaust pipe are arranged on the base and are spaced apart from the visual inspection mechanism and the laser mechanism; the exhaust pipe has one end away from the exhaust pump toward the position where the laser mechanism welds the workpiece.

8. The coaxial laser welding device according to claim 1, characterized in that: The laser mechanism includes a galvanometer, a laser folding mirror and a laser. The galvanometer is fixed to the base, and the laser folding mirror is arranged on the galvanometer and located on one side of the galvanometer. The laser is connected to the laser folding mirror and arranged at intervals with the galvanometer. The laser folding mirror is used to change the emission angle of the laser generated by the laser so that the laser enters the galvanometer.

9. The coaxial laser welding device according to claim 8, characterized in that: The laser mechanism further comprises a field lens, which is connected to an end of the galvanometer mirror away from the laser folding mirror and is used for amplifying the laser light emitted from the galvanometer mirror.

10. The coaxial laser welding device according to claim 9, characterized in that: The laser mechanism further comprises a beam combining lens, which is connected to the outer wall of the field lens and is used for combining the laser emitted from the field lens with the detection line of sight of the visual detection mechanism.

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