Laser welding device

Abstract

The utility model relates to the technical field of laser welding, in particular to a laser welding device which comprises a laser system and a clamp, the laser system comprises a laser, an optical fiber, a focusing assembly and a positioning assembly, the laser is used for emitting a light beam, and the light beam sequentially passes through the optical fiber, the focusing assembly and the positioning assembly and then irradiates a to-be-welded part; the positioning assembly is used for adjusting the focusing position of the light beam on the to-be-welded part, and energy of the light beam is distributed in a flat-top mode. According to the technical scheme, the laser welding device can be adopted for welding the to-be-welded part, stable welding can be conducted on the premise that whether the to-be-welded part is pretreated or not, irradiation is conducted through high-energy-density light beams distributed on the flat top, an insulating layer on the surface of the to-be-welded part can be instantly gasified, fusion welding is conducted on the to-be-welded part, and the welding quality is improved. And pseudo soldering and unsoldering are effectively avoided, falling and aging caused by long-term use are prevented, the welding yield and the use reliability are improved, and meanwhile resistance increase can be avoided through the laser fusion welding mode.

Description

A laser welding device Technical Field

[0001] This application relates to the field of laser processing technology, and more specifically, to a laser welding apparatus. Background Technology

[0002] With the continuous advancement of 5G construction, the electronic information industry has developed rapidly. Electronic devices have an increasing demand for high-speed signal transmission. Connectors, as a common medium for signal transmission, play a crucial role. In existing technologies, to reduce the weight and resistance of connector products, thinner wires and pins are typically chosen for the interface. The wires are usually insulated enameled wires. However, due to the presence of the insulation layer, it needs to be cleaned before soldering; otherwise, traditional soldering and resistance soldering cannot proceed smoothly. Incomplete cleaning of the insulation layer can easily lead to cold solder joints or detachment. Furthermore, soldering increases resistance and carries the risk of detachment and aging over long-term use. Therefore, existing technologies cannot meet our needs. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of this application is that existing wires are prone to poor soldering and desoldering when using traditional soldering or resistance soldering due to the presence of the insulation layer. Furthermore, soldering also increases resistance, and there is a risk of desoldering and aging after long-term use.

[0004] To address the aforementioned technical problems, this application provides a laser welding apparatus, employing the technical solution described below, including:

[0005] A laser system used to output laser light;

[0006] A clamp is used to hold the workpiece to be welded.

[0007] The laser system includes a laser, an optical fiber, a focusing component, and a positioning component. The laser emits a light beam, which passes sequentially through the optical fiber, the focusing component, and the positioning component before irradiating the workpiece to be welded. The positioning component adjusts the focusing position of the light beam on the workpiece to be welded, and the energy of the light beam is distributed in a flat-top manner.

[0008] Furthermore, the optical fiber is configured as a homogenized optical fiber; and / or,

[0009] The fiber core diameter is 200 μm; and / or,

[0010] The beam's spot diameter is less than 0.2 mm; and / or,

[0011] The diameter of the weld point on the workpiece to be welded is 0.1-0.3 mm.

[0012] Furthermore, the laser is configured as a green laser; and / or,

[0013] The laser emits light in a pulsed laser mode; and / or,

[0014] The pulse width of the laser is 0.01–3 ms; and / or,

[0015] The energy of the laser is 0.01 J; and / or,

[0016] The laser has a peak power of 400W; and / or,

[0017] The wavelength of the laser is 532nm.

[0018] Furthermore, the focusing assembly includes a collimating lens, a galvanometer, and a field lens, and the light beam is focused onto the workpiece to be welded sequentially through the optical fiber, the collimating lens, the galvanometer, and the field lens.

[0019] Furthermore, the positioning component includes a filter and a coaxial beam expander system. The coaxial beam expander system includes a camera. The filter is disposed on the light-inlet end of the camera. The light beam is reflected from the workpiece to be welded to the galvanometer, and then reflected by the galvanometer and the filter to the camera.

[0020] Furthermore, the fixture includes a base and a clamping mechanism, the workpiece to be welded is disposed on the base, and the clamping mechanism clamps the workpiece to be welded.

[0021] Furthermore, the base includes a main body and a feeding component, the parts to be welded include wire and plate, the wire and plate are fixedly mounted on the feeding component, and the pressing mechanism includes a pressing block, the pressing block is mounted on the main body, and the pressing block is used to make the wire and plate fit tightly together.

[0022] Furthermore, the main body is also provided with a first positioning pin, the pressure block is movably mounted on the first positioning pin, and the pressure block is also provided with a buffer spring.

[0023] Furthermore, the clamping mechanism also includes a clamping member and a third limiting block disposed on the pressure block. The main body is also provided with a scale and a fourth limiting block. The clamping member is used to adjust the clamping force of the pressure block. The scale is disposed on the main body, and the fourth limiting block is disposed on the scale. The third limiting block and the fourth limiting block cooperate with the scale to repeatedly position the pressure block.

[0024] Furthermore, the feeding component is provided with a first feed groove for accommodating the wire and a second feed groove for accommodating the sheet metal; and / or,

[0025] The feeding component is provided with a first limiting block for fixing the wire and a second limiting block for fixing the plate; and / or

[0026] The pressure block is provided with a light-transmitting hole.

[0027] Compared with the prior art, the embodiments of this application have the following advantages: This application uses a laser welding device to weld the workpiece, which has the characteristics of small heat-affected zone, fast welding speed and non-contact processing. It can achieve stable welding of the workpiece regardless of whether it has been pre-treated. The high energy density of the laser beam with flat top distribution can instantly vaporize the insulating layer on the surface of the workpiece, and fuse the workpiece, effectively avoiding false welding and desoldering, preventing long-term use from falling off and aging, improving the welding yield and reliability. At the same time, the laser welding method can also avoid increasing resistance and improve the transmission speed of the workpiece. Attached Figure Description

[0028] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the structure of the laser welding device in an embodiment of this application;

[0030] Figure 2 is a schematic diagram of the fixture in an embodiment of this application;

[0031] Figure 3 is an enlarged schematic diagram of A in Figure 2;

[0032] Figure 4 is a top view of the clamp in an embodiment of this application;

[0033] Figure 5 is an enlarged schematic diagram of B in Figure 4;

[0034] Figure 6 is a schematic diagram of the feeding component in an embodiment of this application.

[0035] Reference numerals: 100, Laser system; 200, Fixture; 300, Positioning component; 1, Laser; 2, Fiber optic; 3, Collimating lens; 4, Galvanometer; 5, Field lens; 6, Base; 61, Main body; 611, First positioning pin; 612, Buffer spring; 613, Scale; 614, Second positioning pin; 615, Third positioning pin; 62, Feeding component; 621, First material trough; 622, Second material trough; 63, First limiting block; 64, Second limiting block; 641, Clamping bolt; 65, Clamping component; 66, Third limiting block; 67, Fourth limiting block; 68, Mounting groove; 69, Clamping spring; 7, Clamping block; 71, Light transmission hole; 8, Wire; 9, Sheet metal. Detailed Implementation

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0039] Please refer to Figures 1 to 6. This application provides a laser welding apparatus.

[0040] The laser welding apparatus includes:

[0041] Laser system 100, used for outputting laser light;

[0042] Fixture 200 is used to hold the parts to be welded;

[0043] The laser system 100 includes a laser 1, an optical fiber 2, a focusing component, and a positioning component 300. The laser 1 is used to emit a light beam. The light beam passes through the optical fiber 2, the focusing component, and the positioning component 300 in sequence before irradiating the workpiece to be welded. The positioning component 300 is used to adjust the focusing position of the light beam on the workpiece to be welded. The energy of the light beam is distributed in a flat-top manner.

[0044] This application employs a laser welding device to weld the workpiece, which features minimal heat-affected zone, high welding speed, and non-contact processing. It enables stable welding of the workpiece regardless of whether it has undergone pretreatment. The high-energy-density laser beam with a flat top distribution instantly vaporizes the insulating layer on the surface of the workpiece, achieving fusion welding. This effectively avoids incomplete welding and detachment, preventing long-term detachment and aging, thus improving welding yield and reliability. Furthermore, laser welding avoids increasing resistance and enhances the transmission speed of the workpiece.

[0045] As shown in Figure 1, the optical fiber 2 is further configured as a homogenized optical fiber; and / or,

[0046] The core diameter of optical fiber 2 is 200 μm; and / or,

[0047] The beam's spot diameter is less than 0.2 mm; and / or,

[0048] The diameter of the weld point on the workpiece to be welded is 0.1-0.3 mm.

[0049] The homogenizing fiber is used to homogenize the laser beam, resulting in a flat-top energy distribution. The energy density within the beam spot is uniform, without significant central hot spots or edge energy attenuation. This ensures uniform heat input during welding, reducing weld defects such as porosity and cracks caused by uneven energy distribution. Simultaneously, the flat-top beam can more effectively melt and bond materials without the need for auxiliary materials. Once a molten pool is formed, its welding reliability is higher than that of gap-diffusion soldering, thus solving the problem of incomplete soldering, achieving a more uniform weld width and depth, improving weld strength and reliability. Furthermore, controlling the diameter of the focused laser spot can prevent the softening of thin copper wires, effectively reducing the heat-affected zone during welding.

[0050] It is understood that the diameter of the weld point on the workpiece to be welded is any value among 0.1mm, 0.2mm, and 0.3mm, or a range between two values.

[0051] As shown in Figure 1, the laser 1 is further configured as a green laser; and / or,

[0052] The laser 1 emits light in a pulsed laser manner; and / or,

[0053] The pulse width of the laser 1 is 0.01–3 ms; and / or,

[0054] The energy of laser 1 is 0.01 J; and / or,

[0055] The peak power of laser 1 is 400W; and / or,

[0056] The wavelength of the laser 1 is 532nm.

[0057] In this embodiment, the workpiece to be welded includes a wire 8 and a plate 9. The wire 8 can be made of thin copper wire, and the plate 9 can be made of thin copper sheet. Because the wire 8 is small in size and sensitive to heat, prolonged laser heating can easily cause it to soften, while excessive laser power can easily cause it to break down or fracture. Therefore, the laser output method of the laser 1 in this application adopts pulse welding. The single-point energy of pulse welding is accurate to 0.01J, which avoids softening of the wire 8, improves the welding stability of highly reflective materials, and setting an appropriate peak power can also prevent the wire 8 from breaking down or fractured. Setting the laser pulse width to within 0.01 to 3 ms results in a short output time, greatly improving welding efficiency.

[0058] As shown in Figure 1, the focusing assembly further includes a collimating lens 3, a galvanometer 4, and a field lens 5. The light beam is sequentially focused onto the workpiece to be welded via the optical fiber 2, the collimating lens 3, the galvanometer 4, and the field lens 5. The collimating lens 3 can reflect or refract light into parallel or quasi-parallel light. The galvanometer 4 achieves rapid and accurate beam deflection, guidance, and positioning by changing the position and angle of the lens. The field lens 5 can focus the parallel beam deflected by the galvanometer 4 onto a small point on the surface of the workpiece to be welded. The focused beam has highly concentrated energy, generating sufficient power density to melt the welding material and improve the welding effect.

[0059] Furthermore, the galvanometer 4 is a two-dimensional or three-dimensional galvanometer. After being reflected by the X-axis and Y-axis of the galvanometer 4, the beam enters the field mirror 5 and moves linearly on the Z-axis. The beam is focused on the workpiece to be welded by the field mirror 5. By rotating the X-axis and Y-axis of the galvanometer 4, the focused spot of the beam moves within the focusing plane, thereby realizing processing on a two-dimensional surface to meet the processing requirements of workpieces of different thicknesses.

[0060] Furthermore, the focal length of the collimating lens 3 is 150mm; and / or,

[0061] The focal length of the field lens 5 is 100mm.

[0062] The collimating lens 3 converts the diverging beam into a parallel beam. When the focal length of the collimating lens is 150mm, it provides a wider collimation range compared to collimating lenses with shorter focal lengths. The field lens 5, with a focal length of 100mm, effectively limits the imaging area and avoids unnecessary imaging information.

[0063] As shown in Figure 1, the positioning component 300 further includes a filter and a coaxial beam expander system. The coaxial beam expander system includes a camera. The filter is disposed on the light-inlet end of the camera. The light beam is reflected from the workpiece to be welded to the galvanometer 4, and then reflected by the galvanometer 4 and the filter to the camera.

[0064] A 532nm wavelength filter is installed at the objective lens of the camera to effectively prevent damage to the camera's photosensitive element from laser scattering. The camera is a vision camera; reflected light from the surface of the workpiece to be welded returns to the camera via a galvanometer, and the position of the workpiece is determined by the camera's internal algorithm. Before this, the camera's clearest position must be aligned with the focal point of the laser beam, and the camera's XY coordinates are calibrated to ensure the actual size of the workpiece matches the software-set size. A template is created by photographing the feature points of the workpiece, and before each processing step, the workpiece is compared to the template to compensate for the target position and ensure welding quality. Simultaneously, the coaxial beam expander increases the diameter of the laser beam, making the laser distribution more uniform in the processing area and improving welding quality. The positioning component 300 is coaxially arranged with the laser processing optical path, enabling precise positioning of the weld point.

[0065] As shown in Figures 2 to 6, the fixture 200 further includes a base 6 and a clamping mechanism, the workpiece to be welded is disposed on the base 6, and the clamping mechanism clamps the workpiece to be welded.

[0066] The clamping mechanism can not only clamp the workpiece to be welded to prevent it from moving during welding and ensure welding quality, but also repeatedly position the workpiece to be welded to achieve rapid installation and loading / unloading of wires 8 and plates 9 of different thicknesses.

[0067] As shown in Figures 2 to 6, the base 6 further includes a main body 61 and a feeding component 62. The workpiece to be welded includes wire 8 and plate 9, which are fixedly mounted on the feeding component 62. The clamping mechanism includes a pressure block 7, which is mounted on the main body 61 and is used to ensure that the wire 8 and plate 9 are tightly fitted together. The feeding component 62 can be removed from the main body 61 during loading and unloading. The modular design of the feeding component 62 facilitates the loading and unloading of the workpiece to be welded and is compatible with different specifications of wire 8 and plate 9. Compared with a direct loading and unloading structure, this application can reduce manufacturing costs and adapt to different specifications of wire 8 and plate 9.

[0068] As shown in Figures 2 to 6, the main body 61 is further provided with a first positioning pin 611, and the pressure block 7 is movably disposed on the first positioning pin 611. The first positioning pin 611 is used to guide the pressure block 7. The pressure block 7 is also provided with a buffer spring 612, which is used to buffer and prevent the buffer spring 612 from being pressed down under the action of gravity.

[0069] As shown in Figures 2 to 6, the clamping mechanism further includes a clamping member 65 and a third limiting block 66 disposed on the clamping block 7. The main body 61 is also provided with a scale 613 and a fourth limiting block 67. The clamping member 65 is used to adjust the clamping force of the clamping block 7. The scale 613 is disposed on the main body 61, and the fourth limiting block 67 is disposed on the scale 613. The scale 613 can initially record the clamping effect. The third limiting block 66 and the fourth limiting block 67 cooperate with the scale 613 to repeatedly position the clamping block 7. Specifically, by adjusting the position of the fourth limiting block 67 on the scale 613, it can accommodate wires 8 and plates 9 of different thicknesses. When locked, the pressing block 7 is pushed to press the workpiece to be welded under the action of the pressing member 65. At the same time, the third limiting block 66 and the fourth limiting block 67 abut against each other, so that it can be known that the pressing block 7 has moved to the position of pressing the workpiece to be welded. Repeated positioning of wires 8 and plates 9 of the same thickness can be performed, which is convenient for the installation and loading / unloading of the workpiece to be welded. When it is necessary to repeatedly position the wire 8 and plate 9 of another thickness, adjust the position of the fourth limiting block 67 on the scale 613 so that the fourth limiting block 67 points to the scale on the scale 613 corresponding to the other thickness. Then lock the fourth limiting block 67 on the scale 613. The third limiting block 66 and the fourth limiting block 67 abut against each other, indicating that the pressure block 7 has moved to the position of pressing the workpiece to be welded. At this time, the wire 8 and plate 9 of another thickness can be repeatedly positioned.

[0070] Furthermore, the clamping member 65 is configured as a bolt, allowing for direct tightening. Under the action of the clamping member 65, the pressure block 7 is pushed to clamp the workpiece to be welded. Alternatively, the clamping member 65 can also be configured as a cylinder, electric cylinder, or other means for clamping. This application uses a partial clamping method, where the wire 8 and the plate 9 are positioned and clamped separately. In mass production, an overall clamping method can also be used, where the entire pressure block simultaneously clamps the wire 8 and the plate 9.

[0071] As shown in Figures 2 to 6, the feeding component 62 is further provided with a first feed groove 621 for accommodating the wire 8 and a second feed groove 622 for accommodating the plate 9; and / or,

[0072] The feeding component 62 is provided with a first limiting block 63 for fixing the wire 8 and a second limiting block 64 for fixing the plate 9; and / or

[0073] The pressure block 7 is provided with a light-transmitting hole 71.

[0074] The first feed trough 621 is used to position the wire 8 and the first limiting block 63 is used to fix it. The second feed trough 622 is used to position the plate 9 and the second limiting block 64 is used to fix it. The wire 8 and the plate 9 can be quickly and accurately positioned and fixed respectively. The light-transmitting hole 71 is beneficial to the positioning and welding of the laser system 100, which improves the welding yield and reliability.

[0075] Furthermore, the diameter of the light-transmitting hole 71 is 0.4 mm, and to avoid laser obstruction, the depth of the light-transmitting hole 71 is ≤1.0 mm.

[0076] Furthermore, the second limiting block 64 is connected to the feeding component 62 via a clamping bolt 641. Tightening the clamping bolt 641 will push the second limiting block 64 to press the plate 9 under the action of the clamping bolt 641. The feeding component 62 is also provided with a mounting groove 68. The first limiting block 63 is slidably disposed in the mounting groove 68. A clamping spring 69 is provided in the mounting groove 68. The first limiting block 63 presses the wire 8 under the action of the clamping spring 69.

[0077] Furthermore, the main body 61 is also provided with a second positioning pin 614, which is used for positioning and fixing the feeding component 62. The feeding component 62 is also provided with a third positioning pin 615, which is used for positioning the second limiting block 64.

[0078] Furthermore, the working process of this application includes the following steps:

[0079] The plate 9 is placed into the second material groove 622, and the second limiting block 64 is fixed to the plate 9 by the clamping bolt 641 driving the second limiting block 64.

[0080] Pull the first limiting block 63 to put the wire 8 into the first material groove 621, and then release the first limiting block 63. Under the action of the compression spring 69, the first limiting block 63 fixes the wire 8.

[0081] The loading component 62, which contains the wire 8 and the plate 9, is placed entirely onto the main body 61;

[0082] Adjust the clamping member 65 to make the wire 8 fit tightly against the plate 9;

[0083] The parameters of the laser 1 are set so that the beam shines on the surface of the wire 8 through the light-transmitting hole 71. The beam is then focused on the surface of the wire 8 by the positioning component 300, and then laser welding is performed.

[0084] After welding is completed, loosen the clamping member 65 and remove the feeding member 62; then pull the first limiting block 63 and loosen the clamping bolt 641 to remove the welded plate 9 and the wire 8.

[0085] In this embodiment, the laser welding device is used to weld a 0.06mm diameter wire 8 to a 0.1mm thick thin copper sheet. The wire 8 is enameled wire and requires no pretreatment before welding. The wire 8 and the sheet 9 are placed in a fixture and fixed in place. Pulse welding is performed using the laser 1, with the laser focus located on the surface of the wire 8. The theoretical diameter of the focused laser spot is approximately 0.13mm. The peak power of the laser used is 400W, and the pulse width is 1.0ms. No shielding gas is required during the welding process. The measured weld diameter is approximately 0.2mm, the weld is smooth and full, the heat-affected zone is small, and the product connection strength is high.

[0086] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A laser welding apparatus, characterized in that, include: A laser system (100) is used to output laser light; a fixture (200) is used to hold the workpiece to be welded; wherein, the laser system (100) includes a laser (1), an optical fiber (2), a focusing component and a positioning component (300), the laser (1) is used to emit a laser beam, the laser beam passes through the optical fiber (2), the focusing component and the positioning component (300) in sequence and then irradiates the workpiece to be welded, the positioning component (300) is used to adjust the focusing position of the laser beam on the workpiece to be welded, and the energy of the laser beam is distributed in a flat-top shape.

2. The laser welding apparatus according to claim 1, characterized in that, The optical fiber (2) is configured as a homogenized optical fiber; and / or, the core diameter of the optical fiber (2) is 200 μm; and / or, the spot diameter of the beam is less than 0.2 mm; and / or, the diameter of the solder joint on the workpiece to be welded is 0.1-0.3 mm.

3. The laser welding apparatus according to claim 1, characterized in that, The laser (1) is configured as a green laser; and / or, the laser (1) emits light in a pulsed laser manner; and / or, the pulse width of the laser (1) is 0.01 to 3 ms; and / or, the energy of the laser (1) is 0.01 J; and / or, the peak power of the laser (1) is 400 W; and / or, the wavelength of the laser (1) is 532 nm.

4. The laser welding apparatus according to claim 1, characterized in that, The focusing assembly includes a collimating lens (3), a galvanometer (4), and a field lens (5). The light beam is focused onto the workpiece to be welded by passing through the optical fiber (2), the collimating lens (3), the galvanometer (4), and the field lens (5) in sequence.

5. The laser welding apparatus according to claim 4, characterized in that, The positioning component (300) includes a filter and a coaxial beam expander system. The coaxial beam expander system includes a camera. The filter is disposed on the light-inlet end of the camera. The light beam is reflected from the workpiece to be welded to the galvanometer (4), and then reflected by the galvanometer (4) and the filter to the camera.

6. The laser welding apparatus according to any one of claims 1 to 5, characterized in that, The fixture (200) includes a base (6) and a clamping mechanism. The workpiece to be welded is disposed on the base (6), and the clamping mechanism clamps the workpiece to be welded.

7. The laser welding apparatus according to claim 6, characterized in that, The base (6) includes a main body (61) and a feeding component (62). The parts to be welded include wire (8) and plate (9). The wire (8) and plate (9) are fixedly mounted on the feeding component (62). The pressing mechanism includes a pressing block (7). The pressing block (7) is mounted on the main body (61). The pressing block (7) is used to make the wire (8) and plate (9) fit tightly together.

8. The laser welding apparatus according to claim 7, characterized in that, The main body (61) is also provided with a first positioning pin (611), the pressure block (7) is movably disposed on the first positioning pin (611), and the pressure block (7) is also provided with a buffer spring (612).

9. The laser welding apparatus according to claim 7, characterized in that, The clamping mechanism further includes a clamping member (65) and a third limiting block (66) disposed on the clamping block (7). The main body (61) is also provided with a scale (613) and a fourth limiting block (67). The clamping member (65) is used to adjust the clamping force of the clamping block (7). The scale (613) is disposed on the main body (61). The fourth limiting block (67) is disposed on the scale (613). The third limiting block (66) and the fourth limiting block (67) cooperate with the scale (613) to repeatedly position the clamping block (7).

10. The laser welding apparatus according to claim 8, characterized in that, The feeding component (62) is provided with a first feed groove (621) for accommodating the wire (8) and a second feed groove (622) for accommodating the plate (9); and / or, the feeding component (62) is provided with a first limiting block (63) for fixing the wire (8) and a second limiting block (64) for fixing the plate (9); and / or, the pressing block (7) is provided with a light-transmitting hole (71).

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