Hand-held laser welding gun and hand-held laser welding machine

Abstract

The utility model discloses a handheld laser welding gun and handheld laser welding machine, handheld laser welding gun, include: the gun body is provided with the light outlet channel in its inside, and the end of gun body is provided with the light outlet, and the light outlet channel is linked together with the light outlet for emitting laser beam, optical assembly is located in the gun body inside, is used for guiding laser beam to emit by the light outlet from the light outlet channel, and forms the light beam focal point on the surface of the workpiece of waiting and processing, the distance of light outlet to light beam focal point is greater than or equal to 30mm, blow department, set up on the gun body, is used for blowing to the direction of the light outlet, forms the air curtain between the light beam focal point and the light outlet, to make the projection of air curtain in the axial direction of light outlet channel completely cover the light outlet, the utility model discloses the air curtain is formed to the direction of the light outlet blowing of blow department, to make the projection of air curtain in the axial direction of light outlet channel completely cover the light outlet, prevents the smoke and splash into the light outlet channel.

Description

Technical Field

[0001] This utility model belongs to the field of laser processing technology, and in particular relates to a handheld laser welding gun and a handheld laser welding machine. Background Technology

[0002] With the development of laser technology, the application of lasers in industry has become increasingly mature. Among them, handheld laser welding machines are designed for applications with limited working space. They mainly consist of a laser welding machine, a handheld welding torch, and connecting cables between the two. Handheld laser welding machines use a high-energy-density laser beam as a heat source for efficient and precise welding. The laser beam is emitted from the handheld welding torch, and the high-energy-density laser beam is precisely projected onto the surface of the material to be welded, causing the material to melt locally and instantaneously to form a high-quality molten pool, which, together with the welding wire, achieves the welding purpose. During the welding process, the welding torch can be moved to adjust the welding area according to the welding requirements, making it suitable for applications such as confined spaces and high-precision welding, and offering excellent flexibility.

[0003] like Figure 1 As shown, the handheld welding torch, as one of the core operating components, directly affects the efficiency and quality of welding operations. The handheld welding torch mainly consists of a torch body and an optical component located inside the torch body. The end of the torch body is connected to a torch rod (100), which is connected to the inside of the torch body to form a light emission channel. The end of the torch rod away from the torch body has a light emission port, and the laser beam can be emitted from the light emission port through the light emission channel. However, during laser welding, when the laser acts on the surface of the welding material, it will generate fumes and spatter. The fumes and spatter will enter the inside of the welding torch through the light emission port and the light emission channel, thereby contaminating the optical components and affecting the welding quality.

[0004] In related technologies, handheld welding torches typically use their barrels to form a slag-repellent channel to prevent fumes and spatter from entering the torch. However, this method is not very effective, and some fumes and spatter will still enter the torch and contaminate the optical components.

[0005] In addition, some people try to prevent fumes and spatter from entering the welding torch by blowing air onto the welding area. However, this method is also ineffective. Fumes and spatter will still enter the welding torch and contaminate the optical components. Furthermore, blowing air onto the welding area may blow away the molten welding material and disrupt the protective atmosphere, thus affecting the welding quality.

[0006] Therefore, how to prevent the fumes and spatter generated during laser welding from easily entering the handheld welding torch and contaminating the optical components is an urgent problem to be solved. Utility Model Content

[0007] In view of this, the present invention provides a handheld laser welding gun and a handheld laser welding machine.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A handheld laser welding gun, comprising:

[0010] The gun body has a light emission channel inside, and a light emission port is provided at the end of the gun body. The light emission channel is connected to the light emission port for emitting a laser beam.

[0011] An optical component, located inside the gun body, is used to guide the laser beam through the light output channel and out of the light output port, and to form a beam focusing point on the surface of the workpiece to be processed;

[0012] The distance from the light outlet to the beam focal point is greater than or equal to 30 mm;

[0013] A blower section is provided on the gun body and is used to blow air in the direction of the light outlet, forming an air curtain between the beam focal point and the light outlet, so that the projection of the air curtain in the axial direction of the light outlet channel completely covers the light outlet.

[0014] Preferably, the blowing part is disposed on the gun body on one side of the light outlet, so that the blowing part blows air in the direction of the light outlet.

[0015] Preferably, the blowing direction of the blowing unit is perpendicular to the axis of the light emission channel, so that the inside and outside of the light emission channel are separated by the air curtain.

[0016] Preferably, it further includes: a gas wire assembly for blowing protective gas in the direction of the beam focal point and extending welding wire.

[0017] Preferably, the gas wire assembly includes a nozzle, a gas pipe, and a wire tube. One end of the nozzle is connected to one end of the gas pipe and one end of the wire tube, respectively, and the other end sprays protective gas and extends welding wire in the direction of the beam focal point.

[0018] Preferably, it further includes a nozzle holder; the nozzle holder is disposed on the lower side of the gun body near the light outlet, and the nozzle is disposed on the nozzle holder.

[0019] Preferably, the other end of the nozzle has at least one air outlet and a guide wire hole, wherein the air outlet is used to blow protective gas in the direction of the beam focal point;

[0020] The wire guide hole is used to extend the welding wire in the direction of the beam focal point.

[0021] Preferably, the nozzle holder has a protective gas chamber and a guide channel separated by a partition. One side of the protective gas chamber is connected to the air pipe, and the other side is connected to the air outlet of the nozzle. One side of the guide channel is connected to the wire tube, and the other side is connected to the wire guide hole of the nozzle.

[0022] Preferably, it further includes a nozzle holder; the nozzle holder is movably disposed on the lower side of the gun body near the light outlet to adjust the angle between the length direction of the nozzle holder and the axial direction of the light outlet channel.

[0023] A handheld laser welding machine includes a laser generating device and a handheld laser welding gun;

[0024] The laser generating device is connected to a handheld laser welding gun to generate laser light and transmit it to the handheld laser welding gun.

[0025] Implementing the embodiments of this utility model will have at least the following beneficial effects:

[0026] This invention utilizes a blower to create an air curtain in the direction of the light outlet, ensuring that the projection of this air curtain along the axis of the light outlet channel completely covers the outlet, preventing fumes and spatter from entering the channel. Furthermore, due to the air curtain's flow velocity and low pressure in its region, the gas within the light outlet channel is driven by the pressure difference to flow towards the air curtain, further preventing fumes and spatter from entering the channel and contaminating the optical components. This provides excellent protection for the optical components within the welding torch. By eliminating the need for a torch handle, welding slag is prevented from entering the torch and contaminating the lenses. Compared to traditional methods that rely on the torch handle to blow protective gas, this invention significantly improves the utilization efficiency of the protective gas by using a blower to create an air curtain. Compared to existing technologies that deliver high-pressure or high-flow-rate protective gas through the light outlet channel (requiring high pressure to suppress welding slag and fumes and prevent damage to the protective lens), this invention only requires low-pressure or low-flow-rate protective gas, saving on the amount of protective gas used and reducing the operating cost of the handheld laser welding torch. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A perspective view of a handheld laser welding gun including a gun barrel in the prior art.

[0029] Figure 2 This is a perspective view of a handheld laser welding gun in one embodiment.

[0030] Figure 3 This is a front cross-sectional view of a handheld laser welding gun in one embodiment.

[0031] Figure 4 This is a schematic diagram of the gas wire assembly in a handheld laser welding gun in one embodiment.

[0032] Figure 5 for Figure 3 Sectional view along the AA direction.

[0033] Among them, 1-gun body, 100-gun rod, 11-light emission channel, 12-light emission port; 2-blowing part; 3-air wire assembly, 31-nozzle fixing seat, 311-protective gas chamber, 3111-protective gas interface, 312-guide channel, 3121-welding wire interface, 32-nozzle, 321-first air outlet, 322-second air outlet, 323-wire guide hole, 33-air pipe, 34-wire tube, 35-angle adjustment bracket. Detailed Implementation

[0034] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0036] The following is combined Figures 2 to 5 The handheld laser welding gun involved in this utility model will be explained in further detail.

[0037] In one embodiment of a handheld laser welding gun, such as Figure 2-5 As shown, the handheld laser welding gun includes: gun body 1, optical components, and blower 2;

[0038] The gun body 1 has a light emission channel 11 inside and a light emission port 12 at the end of the gun body 1. The light emission channel 11 and the light emission port 12 are connected to emit a laser beam.

[0039] An optical component, located inside the gun body 1, is used to guide the laser beam through the light output channel 11 and out of the light output port 12, and to form a beam focusing point on the surface of the workpiece to be processed.

[0040] The distance from the light outlet 12 to the beam focal point is greater than or equal to 30mm;

[0041] The blowing section 2 is disposed on the gun body 1 and is used to blow air in the direction of the light outlet 12 to form an air curtain between the light beam focal point and the light outlet 12, so that the air curtain covers the projection of the light outlet 12 on its axis and prevents smoke and splashes from entering the light outlet channel 11.

[0042] Furthermore, since the air curtain has a certain flow velocity and the pressure in the air curtain area is relatively small, the gas in the light output channel is driven to flow towards the air curtain by the pressure difference, thereby further preventing smoke and spatter from entering the light output channel 11 and contaminating the optical components. This provides good protection for the optical components inside the gun body 1, eliminating the gun barrel design of the gun body 1 and preventing welding slag from entering the light output channel along the gun barrel and contaminating the lens.

[0043] Compared to traditional methods that rely on the gun barrel to blow protective gas, this invention significantly improves the utilization efficiency of protective gas by constructing an air curtain with the blowing section. While achieving the same protective effect, this invention greatly reduces the actual amount of protective gas used, thus lowering the operating cost of handheld laser welding guns.

[0044] Furthermore, by eliminating the barrel design, the overall volume of the gun body 1 is reduced, which can achieve product lightweighting, reduce the weight of the entire gun body 1, and make it easier to carry and use. At the same time, it also saves on the manufacturing process difficulty and product cost of handheld welding guns.

[0045] For example, the optical component includes, in sequence along the laser transmission direction, a laser output head, a collimating lens, a reflecting mirror, and a focusing lens.

[0046] The laser beam is transmitted through an optical fiber to the laser output head at the rear end of the gun body 1 and emitted outward through the output end. The divergent laser beam is transmitted to the collimating lens group and converted into a parallel beam after collimation. The parallel beam is incident on the tilted reflector to achieve the deflection of the laser beam. The deflected beam is focused by the focusing lens and emitted from the light outlet through the light outlet channel.

[0047] In one embodiment of a handheld laser welding gun, the distance from the light outlet 12 to the beam focal point is greater than or equal to 30mm, while the distance between the light outlet and the beam focal point of a handheld laser welding gun with a gun handle 100 is generally 10-20mm. This invention's handheld laser welding gun, by setting the distance between the light outlet 12 and the beam focal point and cooperating with the blowing unit 2 to form an air curtain, creates a stable isolation zone within this distance. This eliminates the need for a gun handle, preventing welding slag from entering the light outlet channel along the gun handle and contaminating the lens.

[0048] The distance from the light outlet 12 to the beam focal point is preferably 50-130mm, more preferably 80-110mm, and even more preferably 90-100mm.

[0049] The blowing direction of the blowing section 2 is perpendicular to the axis of the light emission channel 11, so that the inside and outside of the light emission channel 11 are separated by the air curtain.

[0050] In one embodiment of a handheld laser welding gun, the handheld laser welding gun further includes a gas wire assembly 3, which is used to blow protective gas in the direction of the beam focal point and extend the welding wire.

[0051] For example, the air wire assembly 3 is disposed at the end of the gun body 1 near the light outlet 12.

[0052] Specifically, the air wire assembly 3 includes a nozzle 32, an air pipe 33, and a wire tube 34. One end of the nozzle 32 is connected to one end of the air pipe 33 and one end of the wire tube 34, respectively, and the other end sprays protective gas and extends welding wire in the direction of the beam focusing point.

[0053] By connecting the wire tube 34, the gas tube 33, and the nozzle 32, the welding wire and the shielding gas can be synchronized during welding, ensuring a stable and good atmosphere for the welding area, which is beneficial to ensuring welding quality.

[0054] In another embodiment, the air wire assembly 3 includes a nozzle holder 31, a nozzle 32, an air tube 33, and a wire tube 34. The nozzle holder 31 is disposed on the lower side of the gun body 1 near the light outlet 12, and the nozzle 32 is disposed on the nozzle holder 31.

[0055] One end of the nozzle 32 is connected to one end of the gas tube 33 and the wire tube 34, respectively, and the other end sprays protective gas and extends welding wire in the direction of the laser beam.

[0056] By merging the wire tube 34 and the gas tube 33 onto the nozzle holder 31, the welding wire and the shielding gas can be kept synchronized during welding, ensuring a stable and good atmosphere for the welding area, which is beneficial to ensuring welding quality. Furthermore, the parallel connection of the wire tube 34 and the gas tube 33 makes it easier to use.

[0057] Furthermore, the nozzle fixing seat 31 is movably disposed on the lower side of the gun body 1 near the light outlet 12, so as to adjust the angle between the length direction of the nozzle fixing seat 31 and the axial direction of the light outlet channel.

[0058] For example, the nozzle holder 31 is disposed on the lower side of the gun body 1 near the light outlet 12 via an angle adjustment bracket 35. The angle of the nozzle holder 31 can be adjusted via the angle adjustment bracket 35, thereby adjusting the angle between the welding wire and the laser beam according to the actual welding requirements, so as to improve the flexibility and adaptability of welding.

[0059] The other end of the nozzle 32 has at least one air outlet and a wire guide hole 323, which are used to blow protective gas in the direction of the beam focus point and extend the welding wire.

[0060] The nozzle mounting base 31 has a protective gas chamber 311 and a guide channel 312 separated. One side of the protective gas chamber 311 is connected to the air pipe 33 and the other side is connected to the air outlet of the nozzle 32. One side of the guide channel 312 is connected to the wire tube 34 and the other side is connected to the wire guide hole 323 of the nozzle 32.

[0061] For example, one air outlet is provided; the guide wire hole 323 is sleeved outside the air outlet.

[0062] The guide wire hole 323 is connected to the guide channel 312, and the air outlet is connected to the protective air chamber 311 in the nozzle fixing seat 31.

[0063] A protective gas interface 3111 is provided on one side of the protective gas chamber 311, which is connected to the gas pipe 33. A welding wire interface 3121 is provided on one side of the guide channel 312, which is connected to the wire tube 34.

[0064] By setting up an outlet to separate the shielding gas and the laser beam, the amount of shielding gas consumed during welding can be greatly reduced. Compared with traditional handheld welding torches that use both phosgene and laser, it can save 90% of the shielding gas consumption.

[0065] The gas pipe 33 is connected to the gas outlet through the protective gas chamber 311, and protective gas is sprayed out to form a stable atmosphere for the welding area.

[0066] For example, two air outlets are provided, namely a first air outlet 321 and a second air outlet 322; the opening of the guide wire hole 323 is located between the first air outlet 321 and the second air outlet 322 to ensure a stable atmosphere protection for the beam focusing area.

[0067] The other end of the nozzle 32 has a first air outlet 321, a second air outlet 322, and a guide wire hole 323. The guide wire hole 323 is connected to the guide channel 312. The first air outlet 321 and the second air outlet 322 are connected to the protective air chamber 311 in the nozzle fixing seat 31.

[0068] A protective gas interface 3111 is provided on one side of the protective gas chamber 311, which is connected to the gas pipe 33. A welding wire interface 3121 is provided on one side of the guide channel 312, which is connected to the wire tube 34.

[0069] By setting the first gas outlet 321 and the second gas outlet 322, the shielding gas and the laser beam are separated, which can greatly reduce the consumption of shielding gas during welding. Compared with the traditional handheld welding torch with phosgene and gas in the same path, it can save 90% of the shielding gas consumption.

[0070] The protective gas chamber 311 connects the gas pipe 33 with the first gas outlet 321 and the second gas outlet 322, spraying out protective gas to form a stable atmosphere for the welding area.

[0071] In one embodiment of a handheld laser welding gun, the blowing direction of the blowing section 2 is such that the generated air curtain can create a negative pressure inside the light emission channel 11.

[0072] Alternatively, the blowing section is located on the side of the gun body opposite to the light outlet, so that the blowing section blows air in the direction of the light outlet.

[0073] For example, the blowing part 2 is disposed on the lower side of the light outlet 12 of the gun body 1, and is used to blow air in the direction toward the top of the gun body 1.

[0074] For example, the blower 2 is disposed on the upper side of the light outlet 12 of the gun body 1, and is used to blow air in the direction toward the bottom of the gun body 1.

[0075] For example, the blower 2 is located on the left or right side of the light outlet 12 of the gun body 1, and is used to blow air in a direction toward the right or left side of the gun body 1.

[0076] The blowing part 2 is set at different positions of the light outlet 12 of the gun body 1. It can be adjusted according to specific laser processing needs and working environment, so that the handheld laser welding gun can better adapt to different application scenarios and improve the accuracy and efficiency of processing.

[0077] The width of the air curtain formed by the blowing section 2 is not less than the length of the line connecting any two points of the light outlet 12, so as to ensure that the air curtain generated by the blowing section during operation can effectively block the area where the light outlet and the welding area are located, thus ensuring a good blocking effect.

[0078] Furthermore, the blowing unit 2 can be a fan, an air nozzle connected to an air source, or other components capable of generating an air curtain, as long as the generated air curtain can create a negative pressure inside the light emission channel.

[0079] In one embodiment of a handheld laser welding machine, a laser generating device and a handheld laser welding gun are included; the laser generating device is connected to the handheld laser welding gun and is used to generate laser light and transmit it to the handheld laser welding gun.

[0080] The handheld laser welding gun adopts the configuration described in the above embodiment.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A handheld laser welding gun, characterized in that, include: The gun body has a light emission channel inside, and a light emission port is provided at the end of the gun body. The light emission channel is connected to the light emission port for emitting a laser beam. An optical component, located inside the gun body, is used to guide the laser beam through the light output channel and out of the light output port, and to form a beam focusing point on the surface of the workpiece to be processed; The distance from the light outlet to the beam focal point is greater than or equal to 30 mm; A blower section is provided on the gun body to form an air curtain between the beam focal point and the light outlet, so that the projection of the air curtain in the axial direction of the light outlet channel completely covers the light outlet.

2. The handheld laser welding gun according to claim 1, characterized in that, The blowing section is located on the side of the light outlet on the gun body, so that the blowing section blows air in the direction of the light outlet.

3. The handheld laser welding gun according to claim 1, characterized in that, The blowing direction of the blowing unit is perpendicular to the axis of the light emission channel, so that the inside and outside of the light emission channel are separated by the air curtain.

4. The handheld laser welding gun according to claim 1, characterized in that, Also includes: The gas wire assembly is used to blow protective gas in the direction of the beam focal point and to extend the welding wire.

5. The handheld laser welding gun according to claim 4, characterized in that, The gas-wire assembly includes a nozzle, a gas tube, and a wire tube. One end of the nozzle is connected to one end of the gas tube and one end of the wire tube, respectively, and the other end sprays protective gas and extends welding wire in the direction of the beam focal point.

6. The handheld laser welding gun according to claim 5, characterized in that, It also includes a nozzle holder; the nozzle holder is located on the lower side of the gun body near the light outlet, and the nozzle is mounted on the nozzle holder.

7. The handheld laser welding gun according to claim 6, characterized in that, The other end of the nozzle has at least one air outlet and a wire guide hole. The air outlet is used to blow protective gas in the direction of the beam focal point. ； The wire guide hole is used to extend the welding wire in the direction of the beam focal point.

8. The handheld laser welding gun according to claim 7, characterized in that, The nozzle holder has a protective gas chamber and a guide channel separated by a partition. One side of the protective gas chamber is connected to the air pipe, and the other side is connected to the air outlet of the nozzle. One side of the guide channel is connected to the wire tube, and the other side is connected to the wire guide hole of the nozzle.

9. The handheld laser welding gun according to claim 6, characterized in that, It also includes a nozzle holder; the nozzle holder is movably disposed on the lower side of the gun body near the light outlet to adjust the angle between the length direction of the nozzle holder and the axial direction of the light outlet channel.

10. A handheld laser welding machine, characterized in that, Includes a laser generating device and a handheld laser welding gun as described in any one of claims 1-9; The laser generating device is connected to a handheld laser welding gun to generate laser light and transmit it to the handheld laser welding gun.

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