Laser coaxial hot wire apparatus and method

Abstract

This application discloses a laser coaxial hot wire device and method. By having a first laser emitting component and a second laser emitting component emit lasers onto the workpiece, the laser spot of the first laser on the workpiece moves along a first arc-shaped trajectory, and the laser spot of the second laser on the workpiece moves along a second arc-shaped trajectory. The concave side of the second arc-shaped trajectory is positioned opposite to the concave side of the first arc-shaped trajectory, thereby creating a higher temperature in the region of the workpiece located between the two arc-shaped trajectories. This rapidly melts the workpiece surface in this region, forming a molten pool, thus improving the welding formation effect, reducing welding defects, and enabling additive welding and thick plate welding of non-ferrous metal workpieces. Simultaneously, it also rapidly melts the welding wire supplied by the wire feeding mechanism to the region of the workpiece located between the first and second arc-shaped trajectories, allowing the molten wire to fuse well with the molten pool, thereby improving welding quality.

Description

Technical Field

[0001] This application relates to the field of laser technology, and in particular to a laser coaxial hot filament device and method. Background Technology

[0002] Laser welding is a technology used for metal welding or metal additive manufacturing, primarily for welding stainless steel, carbon steel, aluminum alloys, and other metals to achieve welding of parts with poor self-fusion welding performance or gaps. Current laser welding technology mainly employs laser off-axis welding, where a laser is perpendicularly irradiated onto the workpiece surface and moved along the surface to melt the workpiece, forming a molten pool. Simultaneously, a wire feeding mechanism supplies welding wire to the molten pool at a certain angle to the laser, allowing the welding wire to be melted by the laser and mixed into the molten pool. After the molten pool solidifies, a weld is formed.

[0003] However, existing laser wire melting technology is prone to situations where the workpiece surface or the welding wire does not melt, affecting the welding quality. Summary of the Invention

[0004] This application provides a laser coaxial hot wire device and method, which aims to solve the problem that existing laser wire melting technology often results in the workpiece surface or welding wire not melting, thus affecting the welding quality.

[0005] This application provides a laser coaxial hot filament device, including:

[0006] The first laser emitting assembly includes a first laser emitter and a first galvanometer assembly. The first laser emitter is used to emit a first laser, and the first galvanometer assembly is used to receive the first laser and convert the first laser into scanning light, so that the spot of the first laser on the workpiece moves along a first arc-shaped trajectory.

[0007] The second laser emitting assembly includes a second laser emitter and a second galvanometer assembly. The second laser emitter is used to emit a second laser, and the second galvanometer assembly is used to receive the second laser and convert the second laser into scanning light, so that the spot of the second laser on the workpiece moves along a second arc-shaped trajectory. The concave side of the second arc-shaped trajectory is arranged opposite to the concave side of the first arc-shaped trajectory.

[0008] A wire feeding mechanism is used to provide welding wire to the area of ​​the workpiece located between the first arcuate trajectory and the second arcuate trajectory.

[0009] In some embodiments, the two ends of the first arc-shaped trajectory are connected one-to-one with the two ends of the second arc-shaped trajectory.

[0010] In some embodiments, the shape of the first arc-shaped trajectory is an arc, and the diameter of the first arc-shaped trajectory is greater than or equal to 0.8 mm and less than or equal to 2 mm;

[0011] The second arc-shaped trajectory is circular, and the diameter of the first arc-shaped trajectory is greater than or equal to 0.8 mm and less than or equal to 2 mm.

[0012] In some embodiments, the power of the first laser emitter is greater than the power of the second laser emitter.

[0013] In some embodiments, the wavelength of the first laser is 1064 nm; the wavelength of the second laser is 532 nm.

[0014] In some embodiments, the diameter of the welding wire is greater than or equal to 0.8 mm and less than or equal to 1.6 mm; the wire feeding speed of the wire feeding mechanism is greater than or equal to 10 mm / s and less than or equal to 100 mm / s.

[0015] In some embodiments, the first laser emitting assembly further includes a first collimating lens, a first reflecting mirror, and a first focusing lens. The collimating lens, the first reflecting mirror, the first galvanometer assembly, and the first focusing lens are sequentially connected in optical path along the transmission direction of the first laser. The first collimating lens is used to collimate the first laser, the first reflecting mirror is used to reflect the first laser to the first galvanometer assembly, and the first focusing lens is used to focus the scanning light output by the first galvanometer assembly.

[0016] The second laser emitting assembly further includes a second collimating mirror, a second reflecting mirror, and a second focusing mirror. The collimating mirror, the second reflecting mirror, the second galvanometer assembly, and the second focusing mirror are connected in sequence along the transmission direction of the second laser. The second collimating mirror is used to collimate the second laser, the second reflecting mirror is used to reflect the second laser to the second galvanometer assembly, and the second focusing mirror is used to focus the scanning light output by the second galvanometer assembly.

[0017] In some embodiments, the laser coaxial hot wire device further includes a heating power supply, the negative terminal of which is electrically connected to the welding wire and the positive terminal of which is electrically connected to the workpiece; or, the positive terminal of which is electrically connected to the welding wire and the negative terminal of which is electrically connected to the workpiece.

[0018] In some embodiments, the wire feeding mechanism includes a driving structure and a guide member. The driving structure is used to drive the welding wire to move along the length direction of the welding wire. The guide member has a guide hole for the welding wire to pass through and for guiding the welding wire. The negative or positive terminal of the heating power supply is electrically connected to the welding wire through the guide member, so that the negative or positive terminal of the heating power supply is electrically connected to the welding wire.

[0019] This application embodiment also provides a laser coaxial hot wire method, the method being used to weld a workpiece using a laser coaxial hot wire device as described above. The laser coaxial hot wire device includes a first laser emitting assembly, a second laser emitting assembly, and a wire feeding mechanism. The first laser emitting assembly includes a first laser emitter and a first galvanometer assembly. The first laser emitter emits a first laser beam, and the first galvanometer assembly receives the first laser beam and converts it into scanning light, causing the laser spot on the workpiece to move along a first arc-shaped trajectory. The second laser emitting assembly includes a second laser emitter and a second galvanometer assembly. The second laser emitter emits a second laser beam, and the second galvanometer assembly receives the second laser beam and converts it into scanning light, causing the laser spot on the workpiece to move along a second arc-shaped trajectory. The concave side of the second arc-shaped trajectory is opposite to the concave side of the first arc-shaped trajectory. The wire feeding mechanism is used to provide welding wire to the area of ​​the workpiece located between the first arc-shaped trajectory and the second arc-shaped trajectory. The method includes:

[0020] Provide workpieces;

[0021] The first laser spot of the first laser emitting component of the laser coaxial hot filament device is moved along a first arc trajectory on the workpiece;

[0022] The second laser spot of the second laser emitting component of the laser coaxial hot filament device is moved along the second arc trajectory on the workpiece;

[0023] The welding wire is supplied to the workpiece in the region between the first arc trajectory and the second arc trajectory via the wire feeding mechanism of the laser coaxial hot wire device.

[0024] The laser coaxial hot wire device provided in this application embodiment emits lasers onto the workpiece via a first laser emitting component and a second laser emitting component. The first laser spot on the workpiece moves along a first arc-shaped trajectory, and the second laser spot moves along a second arc-shaped trajectory. The concave side of the second arc-shaped trajectory is positioned opposite to the concave side of the first arc-shaped trajectory, thereby creating a higher temperature in the region between the two arc-shaped trajectories on the workpiece surface. This rapidly melts the area between the two arc-shaped trajectories, forming a molten pool. Simultaneously, it can rapidly melt the welding wire supplied by the wire feeding mechanism to the region between the first and second arc-shaped trajectories on the workpiece, ensuring good fusion of the molten wire with the molten pool and improving welding quality. Attached Figure Description

[0025] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0026] Figure 1 A schematic diagram of one embodiment of the laser coaxial hot wire device provided in this application;

[0027] Figure 2 This is a flowchart of one embodiment of the laser coaxial hot filament method provided in this application.

[0028] Laser coaxial hot wire device 100; first laser emitting assembly 110; first laser emitter 111; first laser 1111; first optical structure 112; first galvanometer assembly 1121; first collimating lens 1122; first reflecting mirror 1123; first focusing lens 1124; second laser emitting assembly 120; second laser emitter 121; second laser 1211; second optical structure 122; second galvanometer assembly 1221; second collimating lens 1222; second reflecting mirror 1223; second focusing lens 1224; wire feeding mechanism 130; drive structure 131; guide component 132; heating power supply 140; welding wire 300; workpiece 400. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0034] This application provides a laser coaxial hot filament device and method. These will be described in detail below.

[0035] First, this application provides a laser coaxial hot wire device. This laser coaxial hot wire device is used for welding wire or additive manufacturing on a workpiece.

[0036] Figure 1 This is a schematic diagram of one embodiment of the laser coaxial hot filament device provided in this application. Figure 1 As shown, the laser coaxial hot wire device 100 includes a first laser emitting assembly 110, a second laser emitting assembly 120, and a wire feeding mechanism 130. The first laser emitting assembly 110 emits a first laser 1111, the second laser emitting assembly 120 emits a second laser 1211, and the wire feeding mechanism 130 provides welding wire 300. Both the first laser 1111 emitted by the first laser emitting assembly 110 and the second laser 1211 emitted by the second laser emitting assembly 120 are used to irradiate the welding or additive manufacturing area of ​​the workpiece 400 to form a molten pool at the welding or additive manufacturing area. The wire feeding mechanism 130 provides welding wire 300 to the molten pool of the workpiece 400, causing the welding wire 300 to melt at the molten pool, thereby achieving welding or additive manufacturing of the workpiece 400.

[0037] Continue to refer to Figure 1 The first laser emitting assembly 110 includes a first laser emitter 111 and a first optical structure 112. The first laser emitter 111 emits a first laser 1111. The first optical structure 112 is optically connected to the output of the first laser emitter 111. The first optical structure 112 receives the first laser 1111 emitted from the output of the first laser emitter 111 and transmits the first laser 1111 to the surface of the workpiece 400, causing the first laser 1111 to form a spot on the surface of the workpiece 400, thereby melting and forming a molten pool on the surface of the workpiece 400. The first optical structure 112 can convert the received first laser 1111 into scanning light, causing the spot of the first laser 1111 on the workpiece 400 to move along a predetermined trajectory, thereby expanding the area of ​​the molten pool formed on the surface of the workpiece 400.

[0038] In some embodiments, the first optical structure 112 may include a first galvanometer assembly 1121, which receives the first laser 1111 and converts it into scanning light, causing the spot of the first laser 1111 on the workpiece 400 to move along a predetermined trajectory. Specifically, the first galvanometer assembly 1121 includes a first galvanometer and a first driving component. The first galvanometer receives the first laser 1111 and emits it. The first driving component is connected to the first galvanometer to drive the first galvanometer to swing along a predetermined trajectory, thereby causing the first laser 1111 reflected by the first galvanometer to swing together in a predetermined direction to form scanning light, and thus causing the spot of the first laser 1111 on the workpiece 400 to move along a predetermined diffraction trajectory. The first driving component may be a drive motor or other component capable of driving the first galvanometer to swing, and is not limited here.

[0039] Similarly, the second laser emitting assembly 120 can include a second laser emitter 121 and a second optical structure 122. The second laser emitter 121 emits a second laser 1211. The second optical structure 122 is optically connected to the output of the second laser emitter 121. The second optical structure 122 receives the second laser 1211 emitted from the output of the second laser emitter 121 and transmits the second laser 1211 to the surface of the workpiece 400, causing the second laser 1211 to form a spot on the surface of the workpiece 400, thereby melting and forming a molten pool on the surface of the workpiece 400. The second optical structure 122 can convert the received second laser 1211 into scanning light, causing the spot of the second laser 1211 on the workpiece 400 to move along a predetermined trajectory, thereby expanding the area of ​​the molten pool formed on the surface of the workpiece 400.

[0040] In some embodiments, the second optical structure 122 may include a second galvanometer assembly 1221, which receives the second laser 1211 and converts it into scanning light, causing the spot of the second laser 1211 on the workpiece 400 to move along a predetermined trajectory. Specifically, the second galvanometer assembly 1221 includes a second galvanometer and a second driving component. The second galvanometer receives the second laser 1211 and emits it. The second driving component is connected to the second galvanometer to drive the second galvanometer to oscillate along a predetermined trajectory, thereby causing the second laser 1211 reflected by the second galvanometer to oscillate together in a predetermined direction to form scanning light, and thus causing the spot of the second laser 1211 on the workpiece 400 to move along a predetermined diffraction trajectory. The second driving component may be a drive motor or other components capable of driving the second galvanometer to oscillate, and is not limited here.

[0041] In some embodiments, the spot of the first laser 1111 on the workpiece 400 can be moved along a first arcuate trajectory, and the spot of the second laser 1211 on the workpiece 400 can be moved along a second arcuate trajectory, wherein the concave side of the second arcuate trajectory is disposed opposite to the concave side of the first arcuate trajectory. The wire feeding mechanism 130 is used to provide welding wire 300 to the area of ​​the workpiece 400 located between the first and second arcuate trajectories.

[0042] The laser coaxial hot wire device 100 provided in this application embodiment emits lasers onto the workpiece 400 via a first laser emitting component 110 and a second laser emitting component 120, respectively. The first laser 1111 moves its spot on the workpiece 400 along a first arc-shaped trajectory, and the second laser 1211 moves its spot on the workpiece 400 along a second arc-shaped trajectory. The concave side of the second arc-shaped trajectory is positioned opposite to the concave side of the first arc-shaped trajectory, thereby creating a higher temperature in the region of the workpiece 400 located between the two arc-shaped trajectories. This rapidly melts the surface of the workpiece 400 in this region, forming a molten pool, thus improving the welding formation effect of the workpiece 400, reducing welding defects, and enabling additive welding and thick plate welding of non-ferrous metal workpieces 400. Simultaneously, it can also rapidly melt the welding wire 300 provided by the wire feeding mechanism 130 to the region of the workpiece 400 located between the first and second arc-shaped trajectories, allowing the molten welding wire 300 to fuse well with the molten pool, thereby improving welding quality.

[0043] It should be noted that the concave side of the first and second arc-shaped trajectories refers to the side of the first and second arc-shaped trajectories that is recessed inward. Conversely, the first and second arc-shaped trajectories also include a convex side, that is, the side of the first and second arc-shaped trajectories that protrudes outward. Furthermore, the first and second arc-shaped trajectories can be circular arcs, elliptical arcs, or other curved shapes.

[0044] In some embodiments, the two ends of the first arc-shaped trajectory of the first laser spot 1111 can be connected one-to-one with the two ends of the second arc-shaped trajectory of the second laser spot 1211. Thus, the first and second trajectories can combine to form a complete ring, allowing the energy of the first laser 1111 and the second laser 1211 to be more evenly distributed along the circumference of the ring. Specifically, when the first and second arc-shaped trajectories are circular arcs, they can combine to form a complete ring.

[0045] In some embodiments, the shape of the first arc-shaped trajectory of the first laser 1111 spot can be an arc, and the diameter of the first arc-shaped trajectory is greater than or equal to 0.8 mm and less than or equal to 2 mm, so that the heat distribution generated by the first laser 1111 on the surface of the workpiece 400 is moderate, enabling rapid melting of the area on the surface of the workpiece 400 located between the two arc-shaped trajectories to form a molten pool. Simultaneously, the welding wire 300 provided by the wire feeding mechanism 130 to the area of ​​the workpiece 400 located between the first and second arc-shaped trajectories can also be rapidly melted. The diameter of the first arc-shaped trajectory can be 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 1.9 mm, etc., specifically determined based on factors such as the power of the first laser 1111 and the spot size of the first laser 1111 on the workpiece 400.

[0046] Similarly, the second arc-shaped trajectory can be circular, and the diameter of the first arc-shaped trajectory can be greater than or equal to 0.8 mm and less than or equal to 2 mm. This ensures that the heat distribution generated by the second laser 1211 on the surface of the workpiece 400 is moderate, enabling rapid melting of the area on the surface of the workpiece 400 located between the two arc-shaped trajectories to form a molten pool. Simultaneously, it can also rapidly melt the welding wire 300 provided by the wire feeding mechanism 130 to the area on the workpiece 400 located between the second and second arc-shaped trajectories. The diameter of the second arc-shaped trajectory can be 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 1.9 mm, etc., specifically determined based on factors such as the power of the second laser 1211 and the spot size of the second laser 1211 on the workpiece 400.

[0047] In some embodiments, the power of the first laser emitter 111 can be greater than the power of the second laser emitter 121. Thus, the second laser 1211 emitted by the second laser emitter 121 with lower power can perform micro-melting on the surface of the workpiece 400, promoting the absorption of laser by the workpiece 400, while the first laser 1111 emitted by the first laser emitter 111 with higher power can achieve a deep-penetration welding effect on the workpiece 400.

[0048] In some embodiments, the wavelength of the first laser 1111 can be 1064nm and the wavelength of the second laser 1211 can be 532nm to further improve the welding effect on highly reflective materials such as copper.

[0049] In some embodiments, the diameter of the welding wire 300 can be greater than or equal to 0.8 mm and less than or equal to 1.6 mm. The wire feeding speed of the wire feeding mechanism 130 is greater than or equal to 10 mm / s and less than or equal to 100 mm / s. This allows the wire feeding mechanism 130 to feed the wire quickly while ensuring that the welding wire 300 melts promptly in the molten pool of the workpiece 400. The diameter of the welding wire 300 and the wire feeding speed of the wire feeding mechanism 130 can be determined based on factors such as the power of the first laser 1111 and the second laser 1211, and the diameters of the first and second arc-shaped trajectories.

[0050] In some embodiments, such as Figure 1 As shown, the first laser emitting assembly 110 may further include a first collimating lens 1122, a first reflecting mirror 1123, and a first focusing lens 1124. The first collimating lens 1122, the first reflecting mirror 1123, the first galvanometer assembly 1121, and the first focusing lens 1124 are sequentially connected in optical path along the transmission direction of the first laser 1111, so that the first laser 1111 emitted by the first laser emitter 111 can be sequentially transmitted to the first collimating lens 1122, the first reflecting mirror 1123, the first galvanometer assembly 1121, and the first focusing lens 1124. The first collimating lens 1122 is used to collimate the first laser 1111, the first reflecting mirror 1123 is used to reflect the first laser 1111 to the first galvanometer assembly 1121, and the first focusing lens 1124 is used to focus the scanning light output by the first galvanometer assembly 1121, thereby increasing the energy density of the laser spot on the surface of the workpiece 400.

[0051] Similarly, the second laser emitting assembly 120 may further include a second collimating mirror 1222, a second reflecting mirror 1223, and a second focusing mirror 1224. The second collimating mirror 1222, the second reflecting mirror 1223, the second galvanometer assembly 1221, and the second focusing mirror 1224 are sequentially connected in optical path along the transmission direction of the second laser 1211, so that the second laser 1211 emitted by the second laser emitter 121 can be sequentially transmitted to the second collimating mirror 1222, the second reflecting mirror 1223, the second galvanometer assembly 1221, and the second focusing mirror 1224. The second collimating mirror 1222 is used to collimate the second laser 1211, the second reflecting mirror 1223 is used to reflect the second laser 1211 to the second galvanometer assembly 1221, and the second focusing mirror 1224 is used to focus the scanning light output from the second galvanometer assembly 1221, thereby increasing the energy density of the laser spot on the workpiece 400 surface.

[0052] In some embodiments, the first laser 1111 and the second laser 1211 directed toward the workpiece 400 may be arranged at an angle to the welding wire 300 provided by the wire feeding mechanism 130 to the molten pool of the workpiece 400, and the first laser 1111 and the second laser 1211 directed toward the workpiece 400 may be distributed on both sides of the welding wire 300 provided by the wire feeding mechanism 130 to the molten pool of the workpiece 400.

[0053] In some embodiments, such as Figure 1 As shown, the laser coaxial hot wire device 100 may further include a heating power supply 140, which is used to heat the welding wire 300 supplied by the wire feeding mechanism 130 to the molten pool of the workpiece 400. Therefore, by preheating the welding wire 300 and the workpiece 400 in advance by the heating power supply 140, the power requirements of the first laser emitter 111 and the second laser emitter 121 are lower while maintaining the same welding effect, and the heat-affected zone and deformation of the weld are smaller. At the same time, the temperature distribution of the molten pool of the workpiece 400 can be controlled, optimizing the weld formation, reducing problems such as undercut, porosity, and uneven formation, and improving the weld formation effect. Furthermore, after the heating power supply 140 preheats the welding wire 300 and the workpiece 400, it can increase the absorption rate of the laser by the workpiece 400 and the welding wire 300, thereby effectively improving the problem of severe reflection of non-ferrous metals and difficulty in melting the workpiece 400 to form a molten pool.

[0054] In this configuration, the negative terminal of the heating power supply 140 can be electrically connected to the welding wire 300, and the positive terminal of the heating power supply 140 can be electrically connected to the workpiece 400. This short-circuit at the contact point between the welding wire 300 and the workpiece 400 generates heat, heating both the welding wire 300 and the workpiece 400. Alternatively, the positive terminal of the heating power supply 140 can be electrically connected to the welding wire 300, and the negative terminal of the heating power supply 140 can be electrically connected to the workpiece 400. This short-circuit at the contact point between the welding wire 300 and the workpiece 400 generates heat, heating both the welding wire 300 and the workpiece 400. The current of the heating power supply 140 can be between 30-120A, and the voltage can be between 10-15V, so that heat is quickly generated after the contact point between the welding wire 300 and the workpiece 400 is short-circuited.

[0055] Specifically, such as Figure 1 As shown, the wire feeding mechanism 130 includes a drive structure 131 and a guide member 132. The drive structure 131 drives the welding wire 300 to move along its length. The guide member 132 has a guide hole for the welding wire 300 to pass through and guide it, so that the welding wire 300 moves stably towards the molten pool of the workpiece 400. The negative or positive terminal of the heating power supply 140 is electrically connected to the welding wire 300 through the guide member 132, so that the negative or positive terminal of the heating power supply 140 is electrically connected to the welding wire 300.

[0056] In some embodiments, the laser coaxial hot wire device 100 may further include a controller electrically connected to the first laser emitting component 110, the second laser emitting component 120 and the wire feeding mechanism 130 to control the operating state of the first laser emitting component 110, the second laser emitting component 120 and the wire feeding mechanism 130, thereby realizing the function of the laser coaxial hot wire device 100 to weld or add material onto the workpiece 400.

[0057] This application also provides a laser coaxial hot wire method, which is used to weld workpieces using the laser coaxial hot wire device in any of the above embodiments. The specific structure of the laser coaxial hot wire device is as described in the above embodiments. Since this laser coaxial hot wire method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] Among them, such as Figure 2 As shown, the laser coaxial hot filament method includes steps S210 to S240, which are described in detail below:

[0059] S210, Provide workpiece 400.

[0060] The workpiece 400 is made of metal, including iron or non-ferrous metals. The shape of the workpiece 400 can be plate-shaped, block-shaped, etc.

[0061] S220, the first laser 1111 of the first laser emitting component 110 of the laser coaxial hot wire device 100 moves the light spot on the workpiece 400 along the first arc-shaped trajectory.

[0062] The first laser emitter 111 of the first laser emitting assembly 110 can be controlled by the control device of the laser coaxial hot wire device 100 to emit the first laser 1111, and the first galvanometer assembly 1121 can be controlled to convert the first laser 1111 into a scanning light that swings along the first arc trajectory, so that the light spot of the first laser 1111 on the workpiece 400 moves along the first arc trajectory.

[0063] S230, the second laser 1211 of the second laser emitting component 120 of the laser coaxial hot wire device 100 moves the spot on the workpiece 400 along the second arc-shaped trajectory.

[0064] The second laser emitter 121 of the second laser emitting assembly 120 can be controlled by the control device of the laser coaxial hot wire device 100 to emit the second laser 1211, and the second galvanometer assembly 1221 can be controlled to convert the second laser 1211 into a scanning light that swings along the second arc-shaped trajectory, so that the spot of the second laser 1211 on the workpiece 400 moves along the second arc-shaped trajectory.

[0065] S240, Welding wire 300 is provided to the workpiece 400 in the area between the first arc trajectory and the second arc trajectory via the wire feeding mechanism 130 of the laser coaxial hot wire device 100.

[0066] The control device of the laser coaxial hot wire device 100 can control the wire feeding structure to provide welding wire 300 to the area of ​​the workpiece 400 located between the first arc trajectory and the second arc trajectory, so that the welding wire 300 melts rapidly in the area of ​​the workpiece 400 located between the first arc trajectory and the second arc trajectory.

[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0068] The foregoing has provided a detailed description of a laser coaxial hot filament device and method provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A laser coaxial hot filament device, characterized in that, include: The first laser emitting assembly includes a first laser emitter and a first galvanometer assembly. The first laser emitter is used to emit a first laser, and the first galvanometer assembly is used to receive the first laser and convert the first laser into scanning light, so that the spot of the first laser on the workpiece moves along a first arc-shaped trajectory. The second laser emitting assembly includes a second laser emitter and a second galvanometer assembly. The second laser emitter is used to emit a second laser, and the second galvanometer assembly is used to receive the second laser and convert the second laser into scanning light, so that the spot of the second laser on the workpiece moves along a second arc-shaped trajectory. The concave side of the second arc-shaped trajectory is arranged opposite to the concave side of the first arc-shaped trajectory. A wire feeding mechanism is used to provide welding wire to the area of ​​the workpiece located between the first arc trajectory and the second arc trajectory; Wherein, the two ends of the first arc-shaped trajectory are connected one-to-one with the two ends of the second arc-shaped trajectory, so that the first arc-shaped trajectory and the second arc-shaped trajectory are combined to form a complete ring; the power of the first laser emitter is greater than the power of the second laser emitter; the first laser and the second laser are respectively set at an angle to the welding wire, and the first laser and the second laser are distributed on both sides of the welding wire; The second laser emitted by the second laser emitter is used to perform micro-melting on the surface of the workpiece, promoting the absorption of laser by the workpiece, while the first laser emitted by the first laser emitter is used to achieve deep-penetration welding on the surface of the workpiece.

2. The laser coaxial hot filament device as described in claim 1, characterized in that, The first arc-shaped trajectory is circular, and the diameter of the first arc-shaped trajectory is greater than or equal to 0.8 mm and less than or equal to 2 mm. The second arc-shaped trajectory is circular, and the diameter of the first arc-shaped trajectory is greater than or equal to 0.8 mm and less than or equal to 2 mm.

3. The laser coaxial hot filament device as described in claim 1, characterized in that, The wavelength of the first laser is 1064 nm; the wavelength of the second laser is 532 nm.

4. The laser coaxial hot filament device as described in claim 1, characterized in that, The diameter of the welding wire is greater than or equal to 0.8 mm and less than or equal to 1.6 mm; the wire feeding speed of the wire feeding mechanism is greater than or equal to 10 mm / s and less than or equal to 100 mm / s.

5. The laser coaxial hot filament device as described in claim 1, characterized in that, The first laser emitting assembly further includes a first collimating lens, a first reflecting mirror, and a first focusing lens. The first collimating lens, the first reflecting mirror, the first galvanometer assembly, and the first focusing lens are connected in sequence along the transmission direction of the first laser. The first collimating lens is used to collimate the first laser, the first reflecting mirror is used to reflect the first laser to the first galvanometer assembly, and the first focusing lens is used to focus the scanning light output by the first galvanometer assembly. The second laser emitting assembly further includes a second collimating mirror, a second reflecting mirror, and a second focusing mirror. The second collimating mirror, the second reflecting mirror, the second galvanometer assembly, and the second focusing mirror are connected in sequence along the transmission direction of the second laser. The second collimating mirror is used to collimate the second laser, the second reflecting mirror is used to reflect the second laser to the second galvanometer assembly, and the second focusing mirror is used to focus the scanning light output by the second galvanometer assembly.

6. The laser coaxial hot filament device according to any one of claims 1 to 5, characterized in that, The laser coaxial hot wire device further includes a heating power supply, the negative terminal of which is electrically connected to the welding wire and the positive terminal of which is electrically connected to the workpiece; or, the positive terminal of which is electrically connected to the welding wire and the negative terminal of which is electrically connected to the workpiece.

7. The laser coaxial hot filament device as described in claim 6, characterized in that, The wire feeding mechanism includes a driving structure and a guide. The driving structure is used to drive the welding wire to move along the length of the welding wire. The guide has a guide hole for the welding wire to pass through and for guiding the welding wire. The negative or positive terminal of the heating power supply is electrically connected to the welding wire through the guide, so that the negative or positive terminal of the heating power supply is electrically connected to the welding wire.

8. A laser coaxial hot wire method, said method being used to weld a workpiece using the laser coaxial hot wire device according to any one of claims 1 to 7, characterized in that, The method includes: Provide workpieces; The first laser spot of the first laser emitting component of the laser coaxial hot filament device is moved along a first arc trajectory on the workpiece; The second laser spot of the second laser emitting component of the laser coaxial hot filament device is moved along the second arc trajectory on the workpiece; The welding wire is supplied to the workpiece in the region between the first arc trajectory and the second arc trajectory via the wire feeding mechanism of the laser coaxial hot wire device.

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