Handheld laser processing head

Abstract

The invention belongs to the technical field of handheld laser welding, and particularly relates to a handheld laser machining head. The handheld laser machining head comprises a body and an air supply assembly. The body is provided with a laser channel for conveying laser. The gas supply assembly is provided with a gas channel used for conveying gas, at least part of the gas supply assembly is integrally arranged in the body, and the gas channel and the laser channel are independently arranged. According to the scheme, the air channels are integrally arranged in the body, compact layout of the machining head is achieved, and the problem that in the prior art, due to scattered air pipes, the operation flexibility of the machining head is limited is solved; and meanwhile, the independent gas pipe can ensure the protection effect, the gas amount is saved, and the economic benefit is better.

Description

Technical Field

[0001] The present invention belongs to the technical field of handheld laser welding, and particularly relates to a handheld laser processing head. Background Art

[0002] Currently, handheld laser welding is a laser welding method in which a laser processing head is modified to be handheld for direct manual operation. Compared with general platform laser welding, handheld laser welding is more flexible and has a more diverse application scenario; compared with traditional handheld arc welding, argon arc welding and other welding methods, it also has the unique advantages of laser welding. Coupled with an attached light source swing and an intelligent structure system, the requirements for the welding level of welders in handheld laser welding are greatly reduced, and the market application potential for liberating the demand for welding ability is huge.

[0003] However, there are two setting methods for the gas path of the existing handheld welding equipment. In the first method, the gas path and the laser beam are output through the same channel. Since the laser beam needs to swing, the inner diameter of the laser channel will not be too small. As a result, the consumption of protective gas during use will be relatively large, resulting in a problem of resource waste. In the second method, the gas path is externally provided outside the welding equipment through an independent pipeline. The subsequent problem is that the externally provided pipeline reduces the operation flexibility of the entire welding equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a handheld laser processing head, aiming to solve the above existing problems.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A handheld laser processing head includes: A body having a laser channel for transmitting laser; A gas supply component having an air duct for supplying gas. At least part of the gas supply component is integrally arranged inside the body, and the air duct and the laser channel are arranged independently of each other.

[0006] In one embodiment, the handheld laser processing head includes a wire feeding component. The wire feeding component includes a wire outlet channel for feeding a welding wire. The wire outlet channel extends along the arc surface of any side surface of the body. At least part of the wire feeding component is integrally arranged inside the body, and the wire outlet channel and the laser channel are arranged independently of each other, and the wire outlet channel and the air duct are at least partially independent of each other.

[0007] In one embodiment, the wire feeding component has a wire outlet, the gas supply component has a gas outlet, the body has a light outlet communicating with the laser channel, and the laser processing head includes at least one detachable gun rod; The light outlet, the gas outlet and the wire outlet are located on the same gun rod; Or, the light outlet, the gas outlet and the wire outlet are respectively located on different gun rods; Alternatively, any two of the light outlet, the gas outlet, and the wire outlet are located on the same gun barrel, and the other is located on another gun barrel.

[0008] In one embodiment, the gun barrel has a nozzle. When the light outlet, the gas outlet, and the wire outlet are located on the same gun barrel, the light outlet, the gas outlet, and the wire outlet can be located in the same nozzle. Two of the light outlet, the gas outlet, and the wire outlet are in communication with each other, and the light outlet and the wire outlet are not in communication.

[0009] In one embodiment, the axial length of the light outlet along the optical path transmission direction is equal to or less than the length of the gas outlet or the wire outlet.

[0010] In one embodiment, the nozzle includes: A first channel; A second channel. The first channel and the second channel are independently arranged and are used to blow a straight main air flow and an auxiliary air flow onto the processing surface respectively, so that the main air flow and the auxiliary air flow accurately cover a specified area of the processing surface, and the projected area of the air flows of the first channel and the second channel on the processing surface is greater than or equal to the area of the specified area.

[0011] In one embodiment, the wire feeding tube is a flexible wire feeding tube, and at least one drag reduction device for reducing the resistance of the welding wire is arranged inside the wire feeding tube.

[0012] In one embodiment, the hand-held laser processing head includes at least one lens module and a first elastic snap component arranged in the laser channel. The lens module is fixed to the main body through the first elastic snap component, and when a new lens module is installed on the main body, the old lens module is synchronously disassembled.

[0013] In one embodiment, the hand-held laser processing head includes a laser processing head galvanometer module, and the laser processing head galvanometer module includes: A reflecting mirror for deflecting the laser beam; A connecting rod assembly, one end of which is drivingly connected to the reflecting mirror; A driver drivingly connected to the other end of the connecting rod assembly, for driving the reflecting mirror to swing around a rotation center line, and the driver is located on the side where the reflecting surface of the reflecting mirror is located for driving the reflecting mirror to swing around a rotation center line, and the driver is located on the side where the reflecting surface of the reflecting mirror is located.

[0014] In one embodiment, the hand-held laser processing head includes a laser emitting component, and one end of the laser emitting component and / or the air supply component for air intake and / or the wire feeding component for wire feeding is hermetically integrated inside the main body by means of a thread.

[0015] The present invention has at least the following beneficial effects: The handheld laser processing head of the present invention includes a main body and a gas supply component. The main body includes a main body and a handle, and the main body has a laser channel for transporting laser; the gas supply component has an air duct for transporting gas, at least part of the gas supply component is integrally arranged inside the main body, and the air duct and the laser channel are arranged independently of each other. In other words, the central axes of the air duct and the laser channel are non-coaxial. In this case, the air duct is integrally arranged inside the main body, realizing a compact layout of the processing head, and solving the problem that the operation flexibility of the processing head is limited due to the scattered trachea in the prior art; at the same time, the independent trachea can save the use of gas volume while ensuring the protection effect, and the economic benefit is better. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the gas path, optical path and wire path of the processing head of the present invention and the main body; Figure 2 is Figure 1 Detail enlarged view of E in Figure 3 Stereo schematic diagram of the first rod and the second rod; Figure 4 Partial exploded view of the processing head; Figure 5 Side view of the laser processing head; Figure 6 is Figure 1 Cross-sectional view along - in

[0018] Among them, the reference numerals in the drawings: 1, main body; 22, second elastic buckle assembly; 221, second elastic member; 222, second locking tongue; 11, cover plate; 111, second card slot; 26, focusing lens module; 261, third seal; 13, base; 14, adapter; 33, laser emission assembly; 41, flexible wire feeding tube; 411, welding wire; 45, handle; 48, main body; 511, first rod; 512, second rod; 513, nozzle; 521, air duct; 522, air outlet; 523, air inlet; 532, wire outlet channel; 534, wire inlet; 535, wire outlet; 54, laser channel; X, first direction. Detailed Embodiments

[0019] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0021] In addition, the terms "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] As Figure 1 shown, the present invention provides a handheld laser processing head, which includes a main body 1 and a gas supply assembly. The main body 1 includes a gun barrel, a main body 48 and a handle 45 connected to each other. The main body 1 has a laser channel 54 for transmitting laser; the gas supply assembly has an air duct 521 for transmitting gas. At least part of the gas supply assembly is integrally arranged inside the main body 1, and the air duct 521 and the laser channel 54 are arranged independently of each other. In other words, the central axes of the air duct 521 and the laser channel 54 are non-coaxial.

[0024] In this case, the air duct is integrally arranged inside the main body, realizing a compact layout of the processing head and solving the problem that the operation flexibility of the processing head is limited due to the scattered air pipes in the prior art; at the same time, the independent air pipe can save the use of gas volume while ensuring the protection effect, and the economic benefit is better.

[0025] Now refer to Figures 1 to 4 as shown, and a detailed explanation of the phosgene independent built-in solution of this case will be given.

[0026] In one embodiment, the gas supply component is built-in at the handle 45 position, and partially built-in or / and partially externally located at the main body 48 position.

[0027] There is a built-in component inside the main body 1, which is made of a metal material with better thermal conductivity. The air duct 521 of this case is directly opened in the built-in component, without the need to set up additional air pipes, saving the use of components. Compared with the phosgene coaxial output structure in the prior art, the structure of this case saves more flow and is more compact.

[0028] In one embodiment, the welding device includes a gas supply component. The wire feeding component includes a wire outlet channel 532 for feeding the welding wire 411. At least part of the wire feeding component is integrally arranged inside the main body 1, and the wire outlet channel 532 and the laser channel 54 are arranged independently of each other, and the wire outlet channel 532 and the air duct 521 are at least partially arranged independently.

[0029] Optionally, the wire feeding component is built-in at the handle 45 position, and partially built-in or partially externally located at the main body 48 position. Among them, the main body 48 includes a gun rod part at the front end (along the optical path direction) and a gun body part for accommodating various optical lenses. Specifically, the wire feeding component is built-in at the handle 45 position, and partially built-in or / and partially externally located at the gun rod; or externally located at the connection position between the gun rod and the handle 45, such as Figure 1 and Figure 4 as shown. The wire feeding component, the handle 45 and the gun body part form a hollow structure to facilitate the user's hand and improve the stability during the welding process.

[0030] In one embodiment, the wire feeding component has a wire outlet 535, the gas supply component has a gas outlet 522, the main body 1 has a light outlet communicating with the laser channel 54, the laser processing head includes at least one detachable gun rod, and the light outlet, the gas outlet 522 and the wire outlet 535 can be located on the same gun rod. At this time, the light outlet, the gas outlet 522 and the wire outlet 535 are arranged independently and separated from each other. Any two of the light outlet, the gas outlet 522 and the wire outlet are communicated, but among them: the light outlet and the wire outlet are not communicated to prevent the welding wire inside the nozzle from being melted by the laser beam.

[0031] In one embodiment, the light outlet, the gas outlet 522 and the light outlet are respectively located on different gun rods. The light outlet, the gas outlet 522 and the light outlet are respectively arranged in one-to-one correspondence with the gun rods.

[0032] In one embodiment, any two of the light outlet, the gas outlet 522 and the light outlet are located on the same gun rod, and the other is located on another gun rod. For example Figure 1 ,Figure 3 and Figure 4 In one of the cases shown, the light outlet and the wire outlet 535 are located on the same rod, configured as the first rod 511 , and the light outlet is only arranged on one gun rod, configured as the second rod 512 .

[0033] like Figure 4 As shown, the processing head includes a base 13 and an adapter 14 connected to each other; wherein the gun rod, the base 13, the adapter 14, the gun rod and the handle 45 are connected in sequence.

[0034] The base 13 and the adapter 14 are provided with corresponding airway adapters, wire outlet adapters and light outlet adapters for adapter, and the two adjacent components are sealed and connected.

[0035] Optionally, as for the arrangement of the second rod 512 and the first rod 511 shown in the present application, the second rod 512 is located above the first rod 511, and a notch is provided at the top of the first rod 511 to facilitate the intersection and convergence of the laser and the welding wire 411. At the same time, the extension length of the second rod 512 is slightly shorter than the length of the first rod 511, and the distance between the light outlet and the welding area is ensured to be the farthest under the premise of ensuring safety, which can effectively prevent welding slag from blocking the laser channel 54.

[0036] In one embodiment, the wire outlet 535 and the light outlet are always separated from each other to prevent the laser from melting the welding wire 411 .

[0037] In one embodiment, the light outlet, the gas outlet 522 and the wire outlet 535 are arranged along a preset shape. That is, the welding wire 411 can be output from the top, left and right sides or other angles of the laser beam through the wire outlet 535.

[0038] It is understandable that the number of the wire outlet 535, the light outlet and the gas outlet 522 of the present application is not limited to one, but can be multiple; when there are multiple light outlets, there can also be multiple corresponding laser channels 54 to achieve multi-beam output. When there are multiple wire outlets 535, composite welding processing of multiple welding wires 411 can be achieved; when there are multiple gas outlets 522, both protection of the welding area and blowing away of welding slag can be achieved.

[0039] Furthermore, the number of air outlets 522 is not limited to one, and may be a mesh structure formed by multiple air outlets 522 , or an annular air duct 521 structure formed by multiple air outlets 522 connected together, and the light outlet and the wire outlet 535 are located inside the annular ring of the annular air duct 521 .

[0040] In the above embodiments, the air outlet 522 is provided at the end face position of the gun barrel. In other embodiments, the air outlet 522 is arranged on the circumferential side of the gun barrel, and is arranged at intervals around the outer or inner side wall of the gun barrel to form a uniform air wall for preventing oxidation of the welding area or for treating welding slag.

[0041] In other embodiments, a branch air duct is provided in the air duct 521 on the gun barrel to divide the air flow in the air duct 521, so that the outlet direction of the divided air flow is inclined, that is, intersects with the optical axis, to blow the tiny substances such as welding slag entering the gun barrel toward the side of the welding area.

[0042] Optionally, the opening direction of the air outlet 522 in this case intersects with the opening direction of the light outlet and forms a predetermined angle, such as 0-90 degrees; specifically, for example, 90 degrees, 30 degrees, 15 degrees, etc. Optionally, the above-mentioned predetermined angle is as large as possible, for example: 45 degrees, 30 degrees, etc.

[0043] Optionally, the wire outlet 535 in this case intersects with the opening direction of the light outlet (that is, the optical axis and the welding wire intersect), and forms a predetermined angle, such as 0-90 degrees; specifically, for example, 90 degrees, 30 degrees, 15 degrees, etc. Optionally, the above-mentioned predetermined angle is as small as possible, for example: 15 degrees, 10 degrees, etc.

[0044] The gun barrel has a nozzle. When the light outlet, the air outlet 522 and the wire outlet 535 are located on the same gun barrel, the light outlet, the air outlet 522 and the wire outlet 535 can be located on the same nozzle. For the convenience of readers to deeply understand the technical solution of the present application, some terms in the present application are defined and explained with reference to the accompanying drawings: Welding moving direction X: The positive direction of the arrow X is the moving direction of the processing head.

[0045] Spot action position: During the laser radiation process, the defocus amount will be appropriately selected according to factors such as the material type, reflectivity, and thickness of the workpiece. Therefore, the laser radiation on the surface of the workpiece weld is not necessarily at the focal plane position. Therefore, the point where the laser processing beam irradiates on the workpiece surface is defined here as: the spot action position, and the spot action position is a high-temperature concentration area, and: as Figure 1 shown, with the spot action position as the origin, the weld behind the arrow X is the welded area, and the weld in front of the arrow X is the area to be welded. A temperature area and a heat-affected area with a certain temperature gradient are formed along the extension direction of the weld on the inner and outer edges of the processing surface, which is called the "temperature field".

[0046] Length and width of the weld: Taking a straight weld as an example, the length of the weld along its extension direction is the length direction, and the distance between the workpieces is the width of the weld.

[0047] Laser transmission direction Y: The positive direction of arrow Y in the figure.

[0048] The auxiliary materials used in the laser processing process are: shielding gas or welding materials. The channels for supplying the output of auxiliary materials (such as the first channel, the auxiliary gas outlet channel group, and the fourth channel) are collectively referred to as the auxiliary material delivery channels.

[0049] This application designs a nozzle for a laser processing head. Now, the specific structure of the nozzle will be explained.

[0050] The nozzle includes at least two gas flow channels for outputting shielding airflows, where at least one gas flow channel is used to emit a laser processing beam to the area to be processed on the workpiece, and the other gas flow channel is used to output an auxiliary airflow.

[0051] Specifically, the nozzle includes a first channel and an auxiliary gas outlet channel group provided thereon, and both the first channel and the auxiliary gas outlet channel group are provided with through holes at both ends. The first channel is provided with a through hole along the axial direction of the nozzle (i.e., the laser transmission direction) to be used for simultaneously outputting the main airflow and the laser processing beam for processing the weld seam of the workpiece. Among them, the auxiliary gas outlet channel group includes at least one channel for outputting the auxiliary airflow (the second channel and the third channel described later). The auxiliary airflow output by the channels of the auxiliary gas outlet channel group can selectively act on the front end or the rear end of the spot action position on the weld seam. Among them, the spot action position and its rear end area form a specified area, that is, a specific temperature area or temperature field; or, the spot action position and its front side area form a specified area, that is, a specific temperature area or temperature field. The auxiliary airflow and the main airflow form an air film on the surface of the temperature field of the processing surface (area to be processed).

[0052] In order to direct the airflow, the opening direction of the channel can intersect the central axis direction of the nozzle, and the central axis of the first channel is coaxially arranged with the central axis of the nozzle. And, in order to prevent interference between the main airflow and the auxiliary airflow, when there is one channel in the auxiliary gas outlet channel group, it can be located on either side of the first channel; or when there are multiple channels in the auxiliary gas outlet channel group, each channel is arranged at intervals around the circumference of the first channel.

[0053] All in all, this technical solution aims to set the above structure on the nozzle to achieve an air film that is adapted to the area to be processed (processing surface) for delivery. To prevent oxidation and isolate the internal and external temperature areas of the molten pool, while ensuring the effect of isolating the plasma cloud and air, the airflow consumption of the shielding gas is saved to the greatest extent, achieving a beautiful weld seam, and having significant economic benefits.

[0054] The micropore arrangement at the nozzle In one embodiment, each of the channels (the second channel and the third channel) is a channel group formed by a plurality of micro-channels distributed at intervals, and the outer contour of each channel group has a regular geometric shape or an irregular special shape. Specifically, each of the channels (the second channel and the third channel) is not a single channel, but a gas channel group formed by a plurality of micro-channels in a certain shape. Each micro-channel outputs a micro-protective air flow, and this structure can evenly refine the first auxiliary air flow and the second auxiliary air flow, which helps to improve the protection effect and increase the aesthetics of the weld seam. The cross-section of the second channel is a runway-shaped channel group formed by arranging a plurality of micro-channels with shapes such as circles and ellipses at intervals. Correspondingly, it can also be that the outlet cross-section of the second channel is a runway-shaped pore group formed by arranging a plurality of micro-openings with shapes such as circles and ellipses at intervals. By analogy, the same is true for the third channel, which will not be elaborated further here.

[0055] Furthermore, for the same channel, that is, for each of the micro-channels in the same channel group, the cross-sectional shapes can be the same or different.

[0056] In another embodiment, each of the channels (the second channel and the third channel) is a single channel. By providing an adjustment structure at the light-incident end of the nozzle, the adjustment structure is provided with micro-channels in different regions to achieve the adjustment of the air flow rate, direction, and even the cross-sectional shape of the corresponding air flow (the cross-sectional shape of the air film) to adapt to non-linear weld tracks (such as curved, annular, etc.), and further reduce the consumption of the air flow rate.

[0057] In summary, the shapes of each of the channels (the second channel and the third channel) and the first channel can be various. Regardless of the values of the air flow rates set for the first channel, the second channel, and the third channel (the auxiliary air flow hole group), and regardless of the sizes set, the projected area of the main air flow output by the first channel on the covering shape of the processing surface is greater than the area of the specific temperature region (temperature field) of the processing surface to ensure that the molten pool near the weld seam can be covered by the above-mentioned air film.

[0058] Optionally, the third channel and the first channel are arranged at intervals vertically, the second channel and the second channel are arranged above the third channel, and are symmetrically arranged about the vertical midline.

[0059] When the outlets of each channel in the auxiliary air outlet channel group and the outlet of the first channel are all arranged on one side of the end face of the light-emitting end of the nozzle, the first channel, the second channel, and the third channel are arranged at intervals along a straight line vertically.

[0060] The above are only several arrangement modes shown in this application. The position arrangements of the first channel, each second channel, and each third channel can be arranged arbitrarily, as long as the main air flow, each first auxiliary air flow, and each second auxiliary air flow do not interfere with each other. The user can choose the arrangement modes of the first channel, the second channel, and the third channel by himself / herself, as long as the unit consumption of the shielding gas is below 4L.

[0061] In addition, the cross-sectional shape of the outlet of the first channel is closely adapted to the spot shape of the laser processing beam passing through in the plane where the outlet is located; further, the axial cross-sectional shape of the first channel can correspond closely to the shape of the laser processing beam to block the returned welding slag and melt.

[0062] The cross-sectional shape of each channel Both ends of the nozzle are the light-emitting end and the light-incident end respectively. The light-incident end is used for the incident of the collimated laser processing beam. The first channel is used to output the collimated laser processing beam. Therefore, the axial channel of the first channel can be set as a straight channel or a tapered channel, and its cross-sectional diameter gradually decreases along the outgoing direction of the laser processing beam (the conveying direction of the main air flow) to accelerate and buffer the main air flow. Correspondingly, the second channel and the third channel of the auxiliary air flow channel group can be set as a straight channel or a tapered channel, and gradually decrease along the conveying direction of the first auxiliary air flow and the conveying direction of the second auxiliary air flow respectively.

[0063] When the outlets of the channels in the auxiliary air outlet channel group and the outlet of the first channel are not set on the same side of the end face of the light-emitting end of the nozzle at the same time, the outlets of the channels in the auxiliary air outlet channel group, that is, the outlets of the second channel and the third channel, or the second channel and the second channel can be set on the circumferential side wall of the nozzle.

[0064] Nozzle end face structure In one embodiment, in order to reduce the space occupation ratio of the overall shape of the nozzle and realize the processing at a narrow space, the outer contour of the nozzle is arranged in a form of gradually decreasing in a tapered shape along the light-emitting direction, and an avoidance part is arranged on the axial outer wall of the nozzle to prevent the outer wall of the nozzle from getting stuck or interfering with the surface of the workpiece. And, the connection contours of the side surfaces of the outer wall of the nozzle are in a rounded state.

[0065] In one embodiment, the outlets of the first channel and the channels in the auxiliary air outlet channel group are located on the same end face or different end faces of the light-emitting end of the nozzle.

[0066] In one case, the end face of the light-emitting end of the nozzle is not a whole flat surface, but is composed of at least two non-parallel (or non-coplanar) small flat surfaces connected. The outlets of the first channel and the channels of the auxiliary gas outlet channel group are respectively located on the above two small flat surfaces (or can be directly arranged on the avoidance part). In this way, the volume of the light-emitting end of the nozzle can be reduced; at the same time, the auxiliary gas outlet channel group can also be arranged on the flat surface closer to the weld to reduce the diffusion of the auxiliary gas. In addition, the outlets of the first channel and the channels of the auxiliary gas outlet channel group are located on the same end face of the light-emitting end of the nozzle, and the cross-section of this end face forms geometric shapes such as a similar triangle, a triangle or a circle.

[0067] In another case, the nozzle is formed by sleeving multiple sleeves. The outlets of the first channel and the auxiliary gas outlet channel group are respectively located on the end faces of two adjacent sleeves, that is, they are located on different end faces. Based on this, the side walls of two adjacent sleeves are in close contact or have a gap. The axial position distance between the inner sleeve and the outer sleeve can be adjusted so that the light-emitting end face of the inner sleeve protrudes or retracts and depresses relative to the light-emitting end face of the outer sleeve. The light-emitting end face of the outer sleeve protrudes relative to the light-emitting end face of the inner sleeve. When the welding head abuts against the workpiece surface, the auxiliary gas flows output by the channels of the auxiliary gas outlet channel group on the outer sleeve (the second channel and the third channel corresponding to the first auxiliary gas flow and the second auxiliary gas flow respectively acting on the rear side and the front side of the light spot action position on the weld, or the second channel and the second channel of the first auxiliary gas flow and the first auxiliary gas flow arranged side by side left and right or front and back and acting together on the rear side of the light spot action position on the weld) are closer to the surface of the workpiece weld, ensuring that the output auxiliary gas flow is blown onto the weld surface in a nearly straight state as much as possible to isolate the plasma cloud near the weld at a short distance.

[0068] The above structures can all transport the auxiliary gas farther and closer to the area to be processed of the workpiece on the premise of saving gas consumption. Because when there is a certain distance between the nozzle and the workpiece weld, the auxiliary gas will disperse everywhere in the air, and the gas flow reaching near the weld surface will be greatly reduced, and the isolation effect on the weld surface will be reduced. Therefore, this solution can further ensure that the air flow reaching the weld surface is in an aggregated and nearly straight state, while improving the utilization rate of the shielding gas and saving the usage amount of the shielding gas.

[0069] In one embodiment, at the nozzle position, the welding wire is built-in or external to the nozzle. When the welding material is built-in to the nozzle, the nozzle has a fourth channel penetrating along a predetermined angle. Optionally, the fourth channel can also be located on the inner sleeve or the outer sleeve. Optionally, the number of inner sleeves is set to multiple, and the fourth channel, the first channel and the auxiliary gas outlet channel group are respectively located on one sleeve, and two adjacent sleeves can relatively expand and contract along their axes to realize the primary expansion and contraction adjustment of each channel and the fourth channel.

[0070] In one embodiment, the nozzle further has a channel or a group of channels for outputting a secondary air flow, and the secondary air flow acts on both sides of the weld (the positions of specific areas on the non-weld surface, that is, the peripheral areas of the temperature field, or defined as the heat affected zone), so as to cool down, clean the area near the weld of the workpiece, prevent spatter from splashing, etc. For example, a plurality of channels arranged at intervals are provided on the peripheral side of the nozzle, and the channels are opened towards the peripheral side of the nozzle. A secondary air film is formed on the peripheral side of the nozzle, and the channels can also be set as a plurality of micro-channels to form a fine secondary air film to block the spatter at the position where the light spot acts (near the molten pool) to a certain extent.

[0071] In one embodiment, a pressure transfer cavity is provided at the light incident end of the nozzle, and the pressure transfer cavity is arranged in a ring shape around the axis of the nozzle. The pressure transfer cavity is used to communicate with the air flow channel from the nozzle.

[0072] The split nozzle of the present application has the following advantages compared with the prior art nozzle: 1. Output at least one type of protective gas to act on different areas before and after the position where the light spot acts on the weld, forming at least one air film, which is used to isolate the air and plasma cloud on the processing surface of the workpiece, so as to protect the temperature field area covered by the air film, maintain the stability of the molten pool and accurately control the temperature; at the same time, accurately supply gas, and on the premise of ensuring the processing effect, save the gas consumption and reduce unnecessary gas consumption; 2. The structural space occupation ratio is relatively small, and the processing task in a narrow scenario can be realized; 3. The main air flow and the laser processing beam are output through the same channel, and can also block the backflow of soot to a certain extent, protect the lens, and prevent the channel from being blocked at the same time; 4. It has strong versatility and can be applied to the scenarios of filler wire welding or non-filler wire welding.

[0073] In one embodiment, the welding device includes at least one lens module provided with a laser channel 54 and a first elastic buckle assembly. The lens module is fixed to the body 1 through the first elastic buckle assembly, and when a new lens module is installed on the body 1, the old lens module is synchronously disassembled.

[0074] Such as Figure 6As shown in the figure, the quick-release structure of the lens module of the present application is applied to a laser processing head. The lens module can be a protective lens module for protecting the optical components in the laser processing head. Among them, the quick-release structure of the lens module includes a body 1, a first elastic buckle assembly, and a lens module. Among them, the body 1 has a protective lens installation cavity for installing the lens module, and an inlet and an outlet oppositely arranged along the extending direction of the protective lens installation cavity. The first elastic buckle assembly includes a first locking tongue that elastically expands and contracts along the first direction X, and the first direction X intersects the extending direction of the protective lens installation cavity. The lens module can be installed into the protective lens installation cavity from the inlet and separated from the protective lens installation cavity through the outlet, and the first locking tongue is used to limit the lens module in the protective lens installation cavity.

[0075] Specifically, the protective lens installation cavity of the present application is set as a channel that penetrates through both ends, and the shape of the protective lens installation cavity is adapted to the outer shape of the lens module. The telescopic direction of the first locking tongue, that is, the first direction X, can intersect the extending direction of the protective lens installation cavity, that is, it includes being perpendicular to the extending direction of the protective lens installation cavity and intersecting the extending direction of the protective lens installation cavity at an acute angle or an obtuse angle. That is to say, the first elastic buckle assembly can be not only arranged on the top of the body 1, but also arranged at positions such as the peripheral side.

[0076] Compared with the prior art, the sealing performance of this case is better, and the disassembly and assembly are quick and simple. When the lens module needs to be replaced, only need to toggle the first locking tongue to make it retract. At this time, the old lens module loses the abutting force. The user can use the new lens module to abut against the top wall of the old lens module through the inlet, so that the old lens module slides down along the extending direction of the protective lens installation cavity until it slides out from the outlet. At the moment, the first locking tongue extends again and abuts against the side wall of the new lens module, so that the assembly process of the new lens module can be completed. This solution only needs to toggle the first locking tongue once to complete the disassembly of the old lens module and the installation of the new lens module. This solution has a simple structure and simple operation, avoiding the risk of dust entering the protective lens installation cavity between the disassembly of the old lens module and the installation of the new lens module, and improving the sealing performance of this solution.

[0077] In one embodiment, the lens module includes a mounting seat. The mounting seat has a first card slot. The first elastic buckle assembly further includes a first elastic member. One end of the first elastic member is connected to the body 1. A positioning protrusion is provided at the end of the first locking tongue. The other end of the first elastic member is sleeved on the positioning protrusion on the first locking tongue, and the first locking tongue is adapted to the first card slot. The mounting seat is used for mounting lenses, such as protective lenses, focusing lenses, etc.

[0078] In one embodiment, a guiding inclined surface portion is provided at the outlet of the first card slot for guiding the first locking tongue so that the first locking tongue can quickly and unobstructedly slide into the inside of the first card slot.

[0079] In one embodiment, the lens module further includes at least one first seal, which is abutted between the side wall of the mounting seat and the inner wall of the protective lens mounting cavity. Preferably, the first seal is a sealing ring made of silicon or rubber. And the first seal is arranged around the lens on the mounting seat.

[0080] In one embodiment, when the new lens module is installed in the protective lens installation cavity, the side wall of the mounting seat close to the outlet is flush with the outer wall of the body 1. In other words, the side of the new lens module is flush with the side of the body 1. When the outer shell of the body 1 is directly configured as an appearance surface, the side wall of the mounting seat is also an appearance surface, which helps to reduce the gap between the body 1 and the mounting seat and improve the sealing effect.

[0081] In one embodiment, please refer to Figure 6 The lens module quick-release structure further includes a cover plate 11 and a second elastic buckle assembly 22. The cover plate 11 is detachably arranged on the body 1 through the second elastic buckle assembly 22. The cover plate 11 can cover the first elastic buckle assembly and the lens module to form a partial appearance surface of the body 1.

[0082] Optionally, the cover plate 11 has a second card slot 111, and the second elastic buckle assembly 22 includes a second elastic member 221 and a second locking tongue 222. One end of the second elastic member 221 is connected to the body 1, and the other end is connected to the second locking tongue 222. The second locking tongue 222 can be elastically retracted along the positive direction of the first direction X or the reverse direction of the first direction X, and is adapted to the second card slot 111. During use, the user can move the second locking tongue 222 to compress the second elastic member 221 along the first direction X, so that the second locking tongue 222 is separated from the second card slot 111, so that the user can directly remove the cover plate 11. Then the above operation is performed to complete the disassembly and replacement assembly process of the lens module.

[0083] Optionally, outer walls of the first locking tongue and the second locking tongue 222 are each provided with a protrusion to increase friction and facilitate quick dialing by the user.

[0084] In one embodiment, please refer to Figure 6 The lens module quick-release structure also includes a second seal, and the body 1 is provided with a third card slot arranged around the edge of the entrance, and the third card slot is used to install the second seal, so as to strengthen the sealing between the cover plate 11 and the body 1, and to strengthen the sealing of the protective lens installation cavity.

[0085] In one embodiment, when the cover plate 11 is fixed on the body 1, the side wall of the cover plate 11 facing away from the inlet is flush with the outer wall of the body 1. When the outer shell of the body 1 is directly configured as an appearance surface, the top wall of the cover plate 11 is also an appearance surface, which helps to reduce the gap between the body 1 and the cover plate 11 and improve the sealing effect.

[0086] Optionally, the quick-release structure of the lens module further includes an internal component. The internal component is sleeved inside the body 1, and the lens mounting cavity for protection is specifically located inside the internal component. Optionally, the internal component is made of a metal material, which has high-precision characteristics during processing and helps to improve the sealing performance of the lens module.

[0087] Optionally, the body 1 also uses a metal material.

[0088] In one embodiment, the body 1 is a laser processing head, such as: a welding gun head, a laser cleaning head, a marking head, etc.

[0089] Furthermore, the laser processing equipment in this case includes: fields such as laser welding, cleaning, and marking, which are not limited one by one here.

[0090] Optionally, the lens module involved in this case can be a protective lens module for protecting other optical devices, or a focusing lens module, etc.

[0091] When the lens module is set as a protective lens module, the quick-release structure of the lens module further includes a focusing lens module. The focusing lens module includes a mounting seat for mounting a focusing lens. A third seal 261 is provided between the mounting seat and the internal component to enhance the sealing performance between the focusing lens and the body 1.

[0092] Now, a detailed explanation of the galvanometer module of the laser processing head in this case will be given.

[0093] In one embodiment, the side where the reflecting surface of the reflecting mirror of the present application is located is defined as the inner side of the laser beam turning path, and the side of the reflecting mirror opposite to the reflecting surface is defined as the outer side of the laser beam turning path.

[0094] The galvanometer module of the laser processing head includes: a reflecting mirror for reflecting a laser beam, a link assembly, and a driver. One end of the link assembly is drivingly connected to the reflecting mirror. The driver is drivingly connected to the other end of the link assembly and is used to drive the reflecting mirror to swing around a rotation center line to adjust the weld width. The central axis of the output shaft of the driver is parallel to and spaced from the rotation center line, and the driver and the reflecting mirror are located on the same side of the link assembly. In other words, the driver is located on the side where the reflecting surface of the reflecting mirror is located. The driver of the present application can be a driving device such as a motor. Further, it can be understood that the motor and the reflecting mirror in this case are located on the same side, reducing the overall volume of the galvanometer module of the laser processing head.

[0095] Furthermore, a drag reduction structure is provided between any two adjacent rotating arms of the link assembly, which can ensure the flexibility and stability of the transmission of the link assembly.

[0096] The body 1 has a mounting cavity for a mirror. The galvanometer module of the laser processing head is disposed in the mirror mounting cavity. Further, the driver is arranged inside the turning path of the laser beam, that is, on the side where the laser beam turns on the mirror, or understood as the side where the reflecting surface of the mirror is located. This solution saves installation space, further reduces the volume of the handheld laser processing head, and improves the portability of the processing head.

[0097] Secondly, for the installation process of the processing head, the galvanometer module of the laser processing head can be disassembled or installed as a whole. Compared with the prior art process of sequentially installing components such as motors and mirrors on the body 1, the process steps and operation methods of this case are simpler and more concise. Compared with the prior art, this case realizes the swing of the reflecting mirror through the transmission of the connecting rod assembly, and at the same time ensures the stability and flexibility of the swing of the reflecting mirror through the drag reduction structure.

[0098] Further, the handheld laser processing head of the present application can be applied to laser processing processes such as welding, marking, and cleaning. Specifically, the handheld laser processing head can be a handheld laser welding head, a handheld laser cleaning head, a handheld laser marking head, and so on.

[0099] In one embodiment, the connecting rod assembly includes a first rotating arm, a second rotating arm, and a third rotating arm that are sequentially hinged. The end of the first rotating arm facing away from the second rotating arm and the end of the third rotating arm facing away from the second rotating arm are respectively hinged to both ends of another second rotating arm, and the two second rotating arms are parallel and spaced apart from each other, or the first rotating arm and the third rotating arm are parallel and spaced apart from each other. It can be understood that a movable four-link rotating arm structure is formed by hinging the third rotating arm, the first rotating arm, and the two second rotating arms. When any one of the rotating arms moves, it can drive the other three rotating arms to rotate around the corresponding hinge point center line.

[0100] Optionally, hinge members are provided at the positions of each hinge point. A drag reduction structure is connected to the hinge members. The drag reduction structure is set as a bearing, and the bearing is connected to the hinge members to increase the transmission stability between the rotating arms and improve the accuracy and stability of the swing of the mirror; the hinge members can be configured as pins.

[0101] The connecting rod assembly includes a main bearing. One end of the mirror is connected to the first rotating arm through the inner ring of the main bearing. The center line of the main bearing is the rotation center line. The output end of the driver is connected to the third rotating arm. When the motor works, after the third rotating arm rotates a predetermined angle along the central axis of the motor, the third rotating arm rotates a predetermined angle around the same inclination under the interlocking action. At the same time, the mirror rotates a predetermined angle around the central axis of the main bearing to realize the control of the swing angle of the mirror.

[0102] In one embodiment, the connecting rod assembly includes a belt, a first rotating arm, and a third rotating arm. The first rotating arm and the third rotating arm are parallel to each other and arranged at intervals. The belt is tensioned and wound around the outer surfaces of the first rotating arm and the third rotating arm. The belt replaces the driving function of the two second rotating arms to drive the first rotating arm and the third rotating arm to rotate synchronously. Specifically, the toothed surface of the belt is wound around the outer surfaces of the first rotating arm and the third rotating arm to increase the sliding friction.

[0103] In one embodiment, the connecting rod assembly includes an elastic ring, a first rotating arm, and a third rotating arm. The first rotating arm and the third rotating arm are parallel to each other and arranged at intervals. The elastic ring is tensioned and wound around the outer surfaces of the first rotating arm and the third rotating arm. The elastic ring can be configured as a silicone part, a rubber part, etc. with a relatively low elastic force.

[0104] In one embodiment, the connecting rod assembly further includes a clip. One end of the clip is sleeved on the inner ring of the main bearing, and one end of the clip is set to be columnar or rod-shaped. A clamping portion is provided at one end of the clip for clamping the mirror. Specifically, the clamping portion is an elastic clamping portion, and the mirror can be detachably installed in the clamping portion. Preferably, the clamping portion clamps the end portion of the mirror close to the central axis.

[0105] In one embodiment, a limiting area is provided at each of the two ends of the first rotating arm or the third rotating arm to limit the rotation angle of the corresponding second rotating arm, so as to improve the swinging accuracy and stability of the mirror.

[0106] In one embodiment, the hand-held laser processing head includes a laser emission component. The laser emission component is located inside the body 1 for emitting a laser beam, and the laser beam passes through the area enclosed by the first rotating arm, the second rotating arm, and the third rotating arm.

[0107] In one embodiment, the outer ring of the main bearing is fixed inside the body 1.

[0108] In one embodiment, the laser processing head galvanometer module further includes a driver fixing base 324 for fixing the driver inside the body 1.

[0109] Refer to Figures 1 to 4 for a detailed explanation of the wire feeding tube structure of this case.

[0110] In one embodiment, the air supply assembly includes a wire feeding tube 41. The wire feeding tube 41 has a wire outlet channel 532, and the wire feeding tube 41 (as Figure 1 shown) extends along the arc surface of any side surface of the body 1.

[0111] In one embodiment, as Figure 2As shown, when the air outlet 522 and the wire outlet 535 are located on the same gun barrel, the wire feeding tube 41 is a partially built-in flexible wire feeding tube, that is, it is exposed at the junction of the main body 48 and the handle 45.

[0112] In one embodiment, when the light outlet, the air outlet 522 and the wire outlet 535 are located on the same gun barrel, the wire feeding tube 41 is a fully built-in flexible wire feeding tube. The drag reduction device is preferably a linear bearing or a ball structure.

[0113] As Figures 1 to 3 As shown, the hand-held laser welding head of the present application includes a main body 1, a wire feeding tube 41 and a drag reduction device. The main body 1 has a wire feeding tube installation channel; the wire feeding tube 41 is arranged along the inner wall of the wire feeding tube installation channel for conveying welding wire. It can be understood that considering the smoothness of wire feeding and production cost, the front end of the wire feeding tube installation channel is arranged near the light outlet position of the main body 1, and the rear end is arranged at the upstream position of the light path. And the wire feeding tube 41 is at least partially arranged inside the wire feeding tube installation channel to improve the integration of the welding head. The overall volume of the gun head is reduced. During the actual welding process, the flexibility of the gun head is improved, and when the wire guiding tube is bent, it is not easy to get stuck, greatly improving the welding effect and production efficiency.

[0114] In one embodiment, the drag reduction device is arranged on the wire feeding tube 41 for guiding and reducing the resistance of the welding wire. Optionally, the wire feeding tube 41 can be spliced by multiple sections of wire feeding tubes, and the drag reduction device is located between two adjacent wire feeding tubes 41.

[0115] Optionally, the drag reduction device can be built inside the wire feeding tube 41, with a higher degree of integration.

[0116] In one embodiment, the drag reduction device is a linear bearing or a ball structure, etc.

[0117] In one embodiment, at least one drag reduction device is arranged in the bending area of the wire feeding tube 41 to reduce the resistance to the welding wire, ensure that the welding wire smoothly passes through during use, and ensure the welding effect.

[0118] In one embodiment, the extending direction of the outlet end of the wire feeding tube 41 and the extending direction of the laser beam form a preset angle to ensure that the welding wire can be fully heated and melted.

[0119] Optionally, in order to further reduce the overall volume of the welding head, the above preset angle is preferably 0-60 degrees, for example, set to 60 degrees, 30 degrees or 10 degrees, etc.

[0120] In one embodiment, the arc-shaped inner wall of the wire feeding tube installation channel is provided with a card slot, and the wire feeding tube 41 is clamped in the card slot to prevent the wire feeding tube 41 from shifting and sliding under the drive of the welding wire 411, thereby affecting the wire feeding speed and welding effect.

[0121] In one embodiment, the handheld laser welding head includes a pressing plate, which connects the wire feeding tube 41 and the body 1 to fix the wire feeding tube 41 inside the slot.

[0122] In one embodiment, the handheld laser welding head includes a nut, an inlet end of the wire feeding tube 41 is threadedly connected to the nut, and the nut is arranged on the body 1.

[0123] In one embodiment, the handheld laser welding head includes a wire feeding tail tube, the main body 1 includes a main body 48 and a handle 45 that are connected to each other, the wire feeding tail tube is detachably arranged in the handle 45, and the wire feeding tail tube is connected to the wire feeding tube 41 and extends out of the handle 45.

[0124] In one embodiment, in one embodiment, the wire outlet channel is extended along the arc surface of any side of the main body 48, wherein the inner wall of the wire feeding tube installation channel at the connection position of the handle 45 and the main body 48 is set as an arc surface, and the wire feeding tube 41 is attached along any arc inner wall surface of the main body. It also includes that the outer wall of the main body 48 is set as an arc surface, and the wire feeding tube 41 is attached along any arc outer wall surface of the main body 48.

[0125] Optionally, the wire feeding tube 41 of the present case may also be configured as a deformable conduit that expands or contracts when subjected to force, and may be a mesh structure or a spiral structure.

[0126] Optionally, the drag reducing device is disposed between two adjacent wire feeding tubes 41 to guide the welding wire 411. It is understandable that the drag reducing device is connected with the wire feeding tube 41, the base 13 and the channel on the adapter 14 to form a complete wire outlet channel.

[0127] Optionally, the wire feeding tube 41 is partially built into the body 1 to form a hollow structure.

[0128] According to the present application, the wire feeding tube installation channel is formed inside the body 1 , and can be a channel arranged on the inner space 12 , or can be formed on the outer shell of the body 1 .

[0129] Optionally, in other embodiments, the wire feeding tube installation channel is a guide groove structure opened on the outer wall of the body 1, and the wire feeding tube 41 can be fixed to the body 1 by setting a decorative outer cover, so that it can be compatible with welding wires of more sizes, thereby improving the versatility of the structure and the convenience of replacing welding wires. The corresponding decorative outer cover can adopt a structure such as a buckle or an elastic buckle to achieve quick disassembly and quick installation.

[0130] In one embodiment, the welding device includes a laser output component. One end of the laser output component and / or the air supply component for air intake and / or wire feeding is integrally sealed inside the main body 1 through threads. That is to say, the laser output component and / or the air supply component for air intake and / or the air supply component can be integrated into an integrated structure at the handle 45 position, solving the problem of limited welding space caused by messy wire in the prior art.

[0131] In summary, the present case has the following advantages: 1. In the present case, the air supply component and the wire feeding component are creatively integrated inside the main body 1, avoiding the problem of space structure limitation brought by the side-axis wire feeding and air supply structure, and making the use range of the processing head wider; 2. Through the special structures of the galvanometer motor and the galvanometer, the internal structure of the main body 1 is reasonably utilized, making the overall layout more compact, and the whole showing miniaturization and light weight; 3. Through the independent air duct 521 structure, the air duct 521 is arranged on the internal built-in parts, without additionally arranging separate air pipes and other structures, reducing the number of components. At the same time, the internal built-in parts are used to dissipate heat from the internal optical lenses; 4. Each lens module, such as the protective lens module and the focusing lens module, can be quickly disassembled and assembled through the first elastic buckle component; 5. The air supply component of the present case can be partially built inside the main body 1, and can be built-in or external in the gun barrel part, realizing a side-axis air supply structure with a small air flow rate, breaking through the coaxial air supply structure in the market, and saving the use of protective gas while improving the welding processing performance.

[0132] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A handheld laser processing head, characterized in that: include: A body having a laser channel for transmitting laser light; The gas supply component has an air channel for conveying gas, at least part of the gas supply component is integrated inside the body, and the air channel and the laser channel are arranged independently of each other.

2. The handheld laser processing head according to claim 1, characterized in that: The handheld laser processing head includes a wire feeding assembly, which includes a wire outlet channel for conveying welding wire, and the wire outlet channel is extended along the arc surface of any side surface of the body. At least part of the wire feeding assembly is integrated inside the body, and the wire outlet channel and the laser channel are arranged independently of each other, and the wire outlet channel and the air channel are at least partially arranged independently.

3. The handheld laser processing head according to claim 2, characterized in that: The wire feeding assembly has a wire outlet, the air feeding assembly has an air outlet, the body has a light outlet connected to the laser channel, and the laser processing head includes at least one detachable gun rod; The light outlet, the air outlet and the wire outlet are located on the same gun rod; Or, the light outlet, the air outlet and the wire outlet are respectively located on different gun rods; Alternatively, any two of the light outlet, the air outlet and the wire outlet are located on the same gun rod, and the other one is located on another gun rod.

4. The handheld laser processing head according to claim 3, characterized in that: The gun rod has a nozzle, and when the light outlet, the air outlet and the wire outlet are located in the same gun rod, the light outlet, the air outlet and the wire outlet can be located in the same nozzle, two of the light outlet, the air outlet and the wire outlet are connected to each other, and the light outlet and the wire outlet are not connected.

5. The handheld laser processing head according to claim 4, characterized in that: The axial length of the light outlet along the light path transmission direction is equal to or less than the length of the air outlet or the wire outlet.

6. The handheld laser processing head according to claim 4, characterized in that: The nozzle comprises: First channel; The second channel, the first channel and the second channel are independently arranged, and are used to blow straight main airflow and auxiliary airflow respectively to the processing surface, so that the main airflow and the auxiliary airflow accurately cover the specified area of ​​the processing surface, and the projection area of ​​the airflow covered by the first channel and the second channel on the processing surface is greater than or equal to the area of ​​the specified area.

7. The handheld laser processing head according to claim 6, characterized in that: The wire feeding tube is a flexible wire feeding tube, and at least one drag reducing device for reducing the drag of the welding wire is arranged inside the wire feeding tube.

8. The handheld laser processing head according to claim 1, characterized in that: The handheld laser processing head includes at least one lens module and a first elastic buckle assembly arranged on the laser channel. The lens module is fixed to the body through the first elastic buckle assembly, and when a new lens module is installed on the body, the old lens module is removed synchronously.

9. The handheld laser processing head according to claim 1, characterized in that: The handheld laser processing head includes a laser processing head galvanometer module, and the laser processing head galvanometer module includes: A reflector for steering the laser beam; A connecting rod assembly, one end of which is drivingly connected to the reflector; A driver is connected to the other end of the connecting rod assembly and is used to drive the reflector to swing around a rotation center line, and the driver is located on the side where the reflective surface of the reflector is located. The driver is used to drive the reflector to swing around a rotation center line, and the driver is located on the side where the reflective surface of the reflector is located.

10. The handheld laser processing head according to claim 2, characterized in that: The handheld laser processing head comprises a laser emitting assembly, and one end of the laser emitting assembly and / or the air inlet of the air supply assembly and / or the wire inlet of the wire supply assembly is integrated into the interior of the body through threaded sealing.

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