Welding equipment

Abstract

A welding device includes: a laser emission module for emitting an initial laser beam; a shaping module, which is arranged on the light-emitting side of the laser emission module and located on the optical path of the initial laser beam, the shaping module receives the initial laser beam and adjusts the laser spot of the initial laser beam to be a hollow spot; a beam splitting module, which includes a beam splitting mirror group and an aperture, the beam splitting mirror group is arranged on the light-emitting side of the shaping module and includes two beam splitting mirrors, the two beam splitting mirrors are arranged at intervals along the vertical direction of the extension direction of the initial laser beam irradiated to the beam splitting module to form a gap, the two beam splitting mirrors are symmetrically arranged about the initial laser beam irradiated to the beam splitting module and both form a preset angle with the initial laser beam irradiated to the beam splitting module, the aperture is located on the light-emitting side of the beam splitting mirror group away from the shaping module and corresponds to the gap; a focusing module is arranged on the light-emitting side of the beam splitting module and on the optical path of the welding laser beam. The above welding device improves the welding quality and reduces the use cost of the welding device.

Description

Technical Field

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

[0002] At present, the application scope of laser welding technology is becoming wider and wider. Laser welding equipment is usually used to weld high-precision products, and a ridge prism is generally installed in the laser welding device to shape the welding laser spot into a hollow spot to avoid focusing the welding laser on the non-welding area of ​​the product and damaging the product.

[0003] However, when the laser welding device is used in a narrow working area, the laser emitted by the laser welding device is easily focused on the welding wire to be welded in the non-welding area due to the limitation of the operating space, thereby causing the welding wire to be welded to melt in the non-welding area and interfere with other components of the product, thereby reducing the welding quality of the product. In addition, the ridge prism has high assembly requirements, high manufacturing difficulty and high price, which increases the use cost of laser welding. Utility Model Content

[0004] In view of the above situation, it is necessary to provide a welding device to improve welding quality and reduce use cost.

[0005] The embodiment of the present application provides a welding device, comprising: a laser emission module, for emitting an initial laser beam; a shaping module, which is arranged on the light-emitting side of the laser emission module and is located on the optical path of the initial laser beam, the shaping module is used to receive the initial welding laser beam and adjust the laser spot of the initial laser beam to be a hollow spot; a beam splitting module, comprising a beam splitting mirror group and an aperture, the beam splitting mirror group is arranged on the light-emitting side of the shaping module and comprises two beam splitters, the two beam splitters are arranged at intervals in a direction perpendicular to the extension direction of the initial laser beam irradiated to the beam splitting module to form a gap, and the two beam splitters are symmetrically arranged with respect to the initial laser beam irradiated to the beam splitting module. The two beam splitters are arranged and both form a preset angle with the initial laser beam irradiated to the beam splitter module, the two beam splitters are used to receive part of the initial laser beam and split the part of the initial laser beam into two parallel welding laser beams, the aperture is located on the light exiting side of the beam splitter group and corresponds to the gap, the aperture is used to absorb another part of the initial laser beam emitted through the gap between the two beam splitters, so as to adjust the hollow light spot into two symmetrical semi-annular light spots; and a focusing module is arranged on the light exiting side of the beam splitter module and on the optical path of the welding laser beam, and is used to receive the welding laser beam and focus the focus of the welding laser beam to a preset position.

[0006] The above-mentioned welding device first shapes the solid light spot irradiated on the shaping module into a hollow light spot through the shaping module, and then divides part of the initial laser beam irradiated to the beam splitter group into two parallel welding laser beams through two beam splitters, and absorbs the other part of the initial laser beam emitted through the gap between the two beam splitters through the aperture to adjust the hollow light spot into two symmetrical semi-annular light spots, and finally focuses the focus of the welding laser beam to a preset position through the focusing module to weld the welding wire at the preset position to the workpiece. In this way, part of the initial laser beam irradiated to the beam splitter group is split into two parallel welding laser beams by two beam splitters, and the other part of the initial laser beam emitted from the gap is absorbed by the aperture, so that the laser spot irradiated by the welding laser beam to the workpiece forms two symmetrical semi-annular spots, which facilitates the welding wire to pass through the gap formed between the two semi-annular spots and adjust the position, so that the welding device is suitable for narrow working spaces. At the same time, the middle part of the semi-annular spot avoids the non-preset position of the product to be welded, so that the welding device can accurately focus the focus of the welding laser beam on the welding wire at the preset position and weld the welding wire to the workpiece, thereby improving the welding quality. In addition, the two beam splitters replace the roof prism to split the initial laser beam, thereby reducing the use cost of the welding device.

[0007] In some embodiments, the laser emission module includes: a laser emitter, arranged on the light incident side of the shaping module, for emitting the initial laser beam; a collimating lens group, arranged on the light output side of the laser emitter, for collimating the initial laser beam; and a beam combiner, arranged on the light output side of the collimating lens group, the beam combiner being used to combine the initial laser beam emitted by the collimating lens group and reflect the initial laser beam to the shaping module.

[0008] In some embodiments, the collimator lens group includes a first collimator lens and a second collimator lens, the first collimator lens and the second collimator lens are both arranged on the optical path of the initial laser beam, the first collimator lens is adjacent to the light emitting side of the laser emitter relative to the second collimator lens, the side surfaces of the first collimator lens close to and away from the light emitting side of the laser emitter are convex and concave respectively, and the side surfaces of the second collimator lens close to and away from the light emitting side of the first collimator lens are both convex.

[0009] In some embodiments, the shaping module includes a first shaping mirror and a second shaping mirror, the first shaping mirror and the second shaping mirror are both arranged on the optical path of the initial laser beam, the first shaping mirror is adjacent to the light emitting side of the laser emission module relative to the second shaping mirror, the side surfaces of the first shaping mirror close to and away from the light emitting side of the laser emission module are a plane and a conical surface, respectively, and the side surfaces of the second shaping mirror close to and away from the light emitting side of the first shaping mirror are a conical surface and a plane, respectively.

[0010] In some embodiments, in a direction perpendicular to an extension direction of the initial laser beam irradiated on the shaping module, a cross-sectional area of ​​the first shaping mirror is smaller than a cross-sectional area of ​​the second shaping mirror.

[0011] In some embodiments, the focusing module includes a reflector and a focusing lens group. The reflector is arranged on the light-emitting side of the beam splitting module. The reflector is used to receive the welding laser beam and reflect the welding laser beam to the focusing lens group. The focusing lens group is arranged on the light-emitting side of the reflector. The focusing lens group is used to focus the focus of the welding laser beam to the preset position.

[0012] In some embodiments, the focusing module further includes: a protective lens, which is disposed on the light-emitting side of the focusing lens group and is located on the optical path of the welding laser beam.

[0013] In some embodiments, the focusing lens group includes a first lens, a second lens, and a third lens which are sequentially arranged along the extension direction of the welding laser beam irradiated to the focusing lens group, the side surfaces of the first lens close to and away from the light emitting side of the reflector are both concave, the side surfaces of the second lens close to and away from the light emitting side of the first lens are both convex, and the side surfaces of the third lens close to and away from the light emitting side of the second lens are convex and concave, respectively.

[0014] In some embodiments, the reflector, the focusing lens assembly and the protective lens are all provided with through holes, and a plurality of the through holes are coaxially arranged.

[0015] In some embodiments, there are multiple groups of beam splitter mirrors, which are arranged in sequence along the extension direction of the initial laser beam irradiated to the beam splitting module and are located between the light exit side of the shaping module and the light entrance side of the aperture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a welding device provided in one embodiment of the present application.

[0017] Figure 2 for Figure 1 A schematic structural diagram of the welding device shown in FIG.

[0018] Figure 3 for Figure 1 Structural schematic diagram of the evolution of laser spot in the welding device shown.

[0019] Figure 4 for Figure 1 A schematic structural diagram of a focusing module in a welding device is shown.

[0020] Figure 5 for Figure 1The schematic diagram of the structure of the laser emission module in the welding device shown.

[0021] Figure 6 for Figure 1 A schematic structural diagram of a shaping module in a welding device is shown.

[0022] Figure 7 for Figure 1 Schematic diagram of the structure of the beam splitter group in the welding device shown.

[0023] Main component symbols

[0024] Welding device 100

[0025] Initial Laser Beam 101

[0026] Welding laser beam 102

[0027] Solid spot 103

[0028] Hollow spot 104

[0029] Semi-circular spot 105

[0030] Laser emission module 10

[0031] Laser transmitter 11

[0032] Collimator lens set 12

[0033] The first collimating mirror 121

[0034] The second collimating mirror 122

[0035] Beam combiner 13

[0036] Plastic Surgery Module 20

[0037] First Shaping Mirror 21

[0038] Second orthopedic mirror 22

[0039] Beam splitter module 30

[0040] Beam splitter set 31

[0041] Beam splitter 311

[0042] Gap 312

[0043] Aperture 32

[0044] Focus module 40

[0045] Reflector 41

[0046] Through hole 411

[0047] Focusing lens group 42

[0048] First lens 421

[0049] Second lens 422

[0050] The third lens 423

[0051] Protective lens 43 DETAILED DESCRIPTION

[0052] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0053] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application 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 therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0056] See also Figure 1 An embodiment of the present application provides a welding device 100 for melting a welding wire and welding it to a preset position of a workpiece, which includes a laser emission module 10, a shaping module 20, a beam splitting module 30 and a focusing module 40.

[0057] See also Figure 1 , Figure 2 and Figure 3 The laser emission module 10 is used to emit an initial laser beam 101. The shaping module 20 is arranged on the light-emitting side of the laser emission module 10 and is located on the optical path of the initial laser beam 101. The laser spot irradiated by the initial laser beam 101 on the shaping module 20 is a solid spot 103. The shaping module 20 is used to receive the initial laser beam 101 and adjust the solid spot 103 of the initial laser beam 101 to a hollow spot 104. The beam splitter module 30 includes a beam splitter group 31 and an aperture 32. The beam splitter group 31 is arranged on the light-emitting side of the shaping module 20 and includes two beam splitters 311. The two beam splitters 311 are spaced apart in a direction perpendicular to the extension direction of the initial laser beam 101 irradiated to the beam splitter module 30 to form a gap 312. The two beam splitters 311 are symmetrically arranged with respect to the initial laser beam 101 irradiated to the beam splitter module 30 and both form a preset angle with the initial laser beam 101 irradiated to the beam splitter module 30. The two beam splitters 311 are used to receive part of the initial laser beam 101 and divide the part of the initial laser beam 101 into two parallel welding laser beams 102. The aperture 32 is located on the light-emitting side of the beam splitter group 31 and corresponds to the gap 312. The aperture 32 is used to absorb another part of the initial laser beam 101 emitted through the gap 312 between the two beam splitters 311 to adjust the hollow light spot 104 into two symmetrical semi-annular light spots 105. The focusing module 40 is disposed on the light exiting side of the beam splitting module 30 and on the optical path of the welding laser beam 102, and is used to receive the welding laser beam 102 and focus the welding laser beam 102 to a preset position. For example, the beam splitter 311 can be a glass plate, and the aperture 32 can be a long strip aperture.

[0058] The above-mentioned welding device 100 first shapes the solid light spot 103 irradiated on the shaping module 20 into a hollow light spot 104 through the shaping module 20, and then divides part of the initial laser beam 101 irradiated to the beam splitter group 31 into two parallel welding laser beams 102 through two beam splitters 311, and absorbs another part of the initial laser beam 101 emitted through the gap 312 between the two beam splitters 311 through the aperture 32 to adjust the hollow light spot 104 into two symmetrical semi-annular light spots 105, and finally focuses the focus of the welding laser beam 102 to a preset position through the focusing module 40 to weld the welding wire located at the preset position to the workpiece. In this way, part of the initial laser beam 101 irradiated to the beam splitter group 31 is split into two parallel welding laser beams 102 by two beam splitters 311, and the other part of the initial laser beam 101 emitted from the gap 312 is absorbed by the aperture 32, so that the laser spot irradiated by the welding laser beam 102 on the workpiece forms two symmetrical semi-annular spots 105, which is convenient for the welding wire to pass through the gap formed between the two semi-annular spots 105 and adjust the position, so that the welding device 100 is suitable for a narrow working space. At the same time, the middle part of the semi-annular spot 105 avoids the non-preset position of the product to be welded, so that the welding device 100 accurately focuses the focus of the welding laser beam 102 on the welding wire at the preset position and welds the welding wire to the workpiece, thereby improving the welding quality. In addition, the two beam splitters 311 replace the ridge prism to split the initial laser beam 101, thereby reducing the use cost of the welding device 100.

[0059] It should be noted that the preset position refers to the position where the welding wire is welded to the workpiece, and the non-preset position refers to the position on the workpiece where welding is not required. Figure 2 Due to the viewing angle and drawing software, the gap 312 in the beam splitter assembly 31 is not obvious, but it does not mean that Figure 2 The middle beam splitter assembly 31 does not have a gap 312 . Please understand the embodiments of the present application in conjunction with all the drawings provided in the present application.

[0060] See also Figure 4 In some embodiments, the laser emission module 10 includes a laser emitter 11, a collimator lens group 12, and a beam combiner 13. The laser emitter 11 is disposed on the light incident side of the shaping module 20, and is used to emit an initial laser beam 101. The collimator lens group 12 is disposed on the light exiting side of the laser emitter 11, and is used to collimate the initial laser beam 101. The beam combiner 13 is disposed on the light exiting side of the collimator lens group 12, and is used to combine the initial laser beam 101 emitted by the collimator lens group 12, and reflect the initial laser beam 101 to the shaping module 20.

[0061] In this way, the relatively divergent initial laser beam 101 emitted by the laser emitter 11 is collimated by the collimating lens group 12, so that the initial laser beam 101 can be accurately emitted into the beam combiner 13 after being collimated by the collimating lens group 12, so that the beam combiner 13 can stably combine the initial laser beam 101 emitted by the collimating lens group 12 and reflect it to the shaping module 20.

[0062] In some embodiments, the collimator lens group 12 includes a first collimator lens 121 and a second collimator lens 122. The first collimator lens 121 and the second collimator lens 122 are both arranged on the optical path of the initial laser beam 101. The first collimator lens 121 is adjacent to the light emitting side of the laser emitter 11 relative to the second collimator lens 122. The side surfaces of the first collimator lens 121 close to and away from the light emitting side of the laser emitter 11 are convex and concave, respectively, and the side surfaces of the second collimator lens 122 close to and away from the light emitting side of the first collimator lens 121 are both convex.

[0063] In this way, the divergence angle of the initial laser beam 101 is first adjusted by the first collimator 121, and then the focus of the initial laser beam 101 is focused by the second collimator 122, so that the first collimator 121 and the second collimator 122 cooperate to collimate the initial laser beam 101 to ensure the parallelism and directionality of the initial laser beam 101, thereby improving the welding accuracy of the welding device 100.

[0064] See also Figure 5 In some embodiments, the shaping module 20 includes a first shaping mirror 21 and a second shaping mirror 22. The first shaping mirror 21 and the second shaping mirror 22 are both arranged on the optical path of the initial laser beam 101. The first shaping mirror 21 is adjacent to the light emitting side of the laser emission module 10 relative to the second shaping mirror 22. The side surfaces of the first shaping mirror 21 close to and away from the light emitting side of the laser emission module 10 are a plane and a conical surface, respectively. The side surfaces of the second shaping mirror 22 close to and away from the light emitting side of the first shaping mirror 21 are a conical surface and a plane, respectively.

[0065] In this way, the focus of the incident initial laser beam 101 is first focused by the first shaping mirror 21, and then the second shaping mirror 22 receives and refracts the initial laser beam 101, so as to adjust the laser spot irradiated on the beam splitting module 30 from a solid spot 103 to a hollow spot 104, and utilize the characteristics of the hollow spot 104 having a higher energy density and a more concentrated thermal effect relative to the realization spot, so that the welding laser beam 102 of the welding device 100 can act on the welding wire more accurately, thereby improving the welding accuracy.

[0066] In some embodiments, in a direction perpendicular to the initial laser beam 101 irradiating the shaping module 20 , a cross-sectional area of ​​the first shaping mirror 21 is smaller than a cross-sectional area of ​​the second shaping mirror 22 .

[0067] In this way, by setting the first shaping mirror 21 and the second shaping mirror 22 of different sizes to cooperate with each other, the diameter size of the hollow light spot 104 can be adjusted. When the cross-sectional area of ​​the first shaping mirror 21 is set to be smaller than the cross-sectional area of ​​the second shaping mirror 22, the first shaping mirror 21 and the second shaping mirror 22 cooperate to shape the solid light spot 103 of the initial laser beam 101 into a hollow light spot 104, and increase the diameter size of the hollow light spot 104, so that the welding device 100 provides a sufficiently large avoidance area for the non-preset positions of the welding wire and the workpiece, thereby preventing the welding device 100 from focusing on the workpiece or the welding wire at the non-preset position.

[0068] See also Figure 6 In some embodiments, the focusing module 40 includes a reflector 41 and a focusing lens group 42. The reflector 41 is disposed on the light-emitting side of the beam splitter lens group 31, and is used to receive the welding laser beam 102 and reflect the welding laser beam 102 to the focusing lens group 42. The focusing lens group 42 is disposed on the light-emitting side of the reflector 41, and is used to focus the focus of the welding laser beam 102 to a preset position.

[0069] In this way, the welding laser beam 102 is first reflected to the focusing lens group 42 by the reflector 41, and then the focus of the welding laser beam 102 is focused to a preset position by the focusing module 40, so that the welding device 100 can accurately melt the welding wire at the preset position and weld the welding wire to the preset position of the workpiece, thereby improving the welding accuracy.

[0070] In some embodiments, the focusing module 40 further includes a protective lens 43 . The protective lens 43 is disposed on the light-emitting side of the focusing lens group 42 and is located on the optical path of the welding laser beam 102 .

[0071] In this way, dirt, dust, water mist, etc. are separated from the optical components in the welding device 100 by the protective mirror 43, so that the optical components in the welding device 100 are prevented from being damaged by external interference factors, thereby improving the service life of the welding device 100.

[0072] In some embodiments, the focusing lens group 42 includes a first lens 421, a second lens 422, and a third lens 423, which are arranged in sequence along the extension direction of the welding laser beam 102 irradiated to the focusing lens group 42. The side surfaces of the first lens 421 close to and away from the light emitting side of the reflector 41 are both concave, the side surfaces of the second lens 422 close to and away from the light emitting side of the first lens 421 are both convex, and the side surfaces of the third lens 423 close to and away from the light emitting side of the second lens 422 are convex and concave, respectively.

[0073] In this way, the spherical aberration existing in the optical path of the welding laser beam 102 is eliminated by the first lens 421 and the second lens 422, and the coma and astigmatism existing in the optical path of the welding laser beam 102 are eliminated by the third lens 423, so that the focal points of the two welding laser beams 102 are focused on the welding wire located at the preset position of the workpiece, thereby enabling the welding device 100 to stably melt the welding wire and weld the welding wire to the preset position of the workpiece.

[0074] In some embodiments, the reflector 41, the focusing lens group 42 and the protective lens 43 are all provided with a through hole 411, and a plurality of through holes 411 are coaxially arranged. In this way, by providing a plurality of coaxially arranged through holes 411 to receive the welding wire, the focusing module 40 can avoid the welding wire, and the welding device 100 can provide an adjustment operation space for the welding wire, so that the operator can adjust the end of the welding wire to the preset position of the workpiece, and the welding device 100 can stably weld the welding wire to the preset position of the workpiece.

[0075] See also Figure 7 In some embodiments, there are multiple groups of beam splitter mirror groups 31, and the multiple groups of beam splitter mirror groups 31 are arranged in sequence along the extension direction of the initial laser beam 101 irradiated to the beam splitter module 30, and are located between the light exit side of the shaping module 20 and the light entrance side of the aperture 32.

[0076] In this way, the initial laser beam 101 is refracted multiple times by the multiple groups of beam mirror groups 31 arranged in sequence to adjust and expand the spot diameter size of the welding laser beam 102, further increase the avoidance area of ​​the welding device 100, and enable the beam splitting module 30 to have a sufficiently large heat dissipation space, which is convenient for the beam splitting module 30 to dissipate heat and improve the service life of the welding device 100.

[0077] The working process of the above-mentioned welding device 100 is roughly as follows:

[0078] First, the laser emitter 11 emits the initial laser beam 101 to the collimator lens group 12, the collimator lens group 12 collimates the initial laser beam 101, and then emits the collimated initial laser beam 101 into the beam combiner 13, the beam combiner 13 combines the initial laser beam 101 emitted by the collimator lens group 12 and then reflects it to the shaping module 20;

[0079] Then, the shaping module 20 adjusts the spot of the initial laser beam 101 irradiated on the shaping module 20 from a solid spot 103 to a hollow spot 104, and then divides part of the initial laser beam 101 irradiated on the beam splitter group 31 into two parallel welding laser beams 102 through two beam splitters 311, and absorbs another part of the initial laser beam 101 emitted through the gap 312 between the two beam splitters 311 through the aperture 32, so as to adjust the laser spot of the welding laser beam 102 to a semi-annular spot 105, thereby replacing the roof prism with two beam splitters 311 to split the initial laser beam 101, thereby reducing the use cost of the welding device 100;

[0080] Finally, the focus of the welding laser beam 102 is focused to a preset position through the focusing module 40, and then the welding wire passes through the gap formed between the two semi-annular light spots 105 and the through hole 411, so as to facilitate the operator to adjust the position of the welding wire so that the welding device 100 is suitable for a narrow working space. At the same time, the middle part of the semi-annular light spot 105 avoids the non-preset position of the product to be welded, so that the welding device 100 can accurately focus on the welding wire at the preset position and weld the welding wire to the workpiece, thereby improving the welding quality.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A welding device, characterized in that: include: A laser emission module, used for emitting an initial laser beam; A shaping module, arranged at the light-emitting side of the laser emitting module and located on the optical path of the initial laser beam, the shaping module is used to receive the laser beam and adjust the laser spot of the initial laser beam to be a hollow spot; A beam splitter module, comprising a beam splitter group and an aperture, wherein the beam splitter group is arranged on the light exit side of the shaping module and comprises two beam splitters, the two beam splitters are arranged at intervals in a direction perpendicular to the extension direction of the initial laser beam irradiated to the beam splitter module to form a gap, the two beam splitters are symmetrically arranged with respect to the initial laser beam irradiated to the beam splitter module and both form a preset angle with the initial laser beam irradiated to the beam splitter module, the two beam splitters are used to receive part of the initial laser beam and evenly split the part of the initial laser beam into two parallel welding laser beams, the aperture is located on the light exit side of the beam splitter group and corresponds to the gap, and the aperture is used to absorb another part of the initial laser beam emitted through the gap between the two beam splitters to adjust the hollow light spot into two symmetrical semi-annular light spots; and A focusing module is arranged on the light-emitting side of the beam splitting module and on the optical path of the welding laser beam, and is used for receiving the welding laser beam and focusing the focus of the welding laser beam to a preset position.

2. The welding device according to claim 1, characterized in that The laser emission module comprises: A laser emitter, disposed on the light incident side of the shaping module, for emitting the initial laser beam; A collimating lens assembly, disposed on the light-emitting side of the laser emitter, for collimating the initial laser beam; and A beam combiner is disposed on the light-emitting side of the collimator lens group, and is used to combine the initial laser beam emitted by the collimator lens group and reflect the initial laser beam to the shaping module.

3. The welding device according to claim 2, characterized in that: The collimator lens group includes a first collimator lens and a second collimator lens. The first collimator lens and the second collimator lens are both arranged on the optical path of the initial laser light beam. The first collimator lens is adjacent to the light-emitting side of the laser emitter relative to the second collimator lens. The side surfaces of the first collimator lens close to and away from the light-emitting side of the laser emitter are convex and concave respectively, and the side surfaces of the second collimator lens close to and away from the light-emitting side of the first collimator lens are both convex.

4. The welding device according to claim 1, characterized in that The shaping module includes a first shaping mirror and a second shaping mirror, both of which are arranged on the optical path of the initial laser beam, the first shaping mirror is adjacent to the light emitting side of the laser emission module relative to the second shaping mirror, the side surfaces of the first shaping mirror close to and away from the light emitting side of the laser emission module are a plane and a conical surface respectively, and the side surfaces of the second shaping mirror close to and away from the light emitting side of the first shaping mirror are a conical surface and a plane respectively.

5. The welding device according to claim 4, characterized in that In a direction perpendicular to an extending direction of the initial laser beam irradiated on the shaping module, a cross-sectional area of ​​the first shaping mirror is smaller than a cross-sectional area of ​​the second shaping mirror.

6. The welding device according to claim 1, characterized in that: The focusing module includes a reflector and a focusing lens group. The reflector is arranged on the light-emitting side of the beam splitting module. The reflector is used to receive the welding laser beam and reflect the welding laser beam to the focusing lens group. The focusing lens group is arranged on the light-emitting side of the reflector. The focusing lens group is used to focus the focus of the welding laser beam to the preset position.

7. The welding device according to claim 6, characterized in that The focusing module also includes: A protective mirror is arranged on the light-emitting side of the focusing lens group and is located on the optical path of the welding laser beam.

8. The welding device according to claim 6, characterized in that: The focusing lens group includes a first lens, a second lens and a third lens which are sequentially arranged along the extension direction of the welding laser beam irradiated to the focusing lens group. The side surfaces of the first lens close to and away from the light emitting side of the reflector are both concave surfaces, the side surfaces of the second lens close to and away from the light emitting side of the first lens are both convex surfaces, and the side surfaces of the third lens close to and away from the light emitting side of the second lens are respectively convex and concave surfaces.

9. The welding device according to claim 7, characterized in that: The reflector, the focusing lens group and the protective lens are all provided with through holes, and a plurality of the through holes are coaxially arranged.

10. The welding device according to claim 1, characterized in that There are multiple groups of beam splitter mirrors, which are arranged in sequence along the extension direction of the initial laser beam irradiated to the beam splitter module and are located between the light exit side of the shaping module and the light entrance side of the aperture.

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