Laser welding nozzle

Abstract

This utility model discloses a laser welding nozzle, which includes a nozzle body having a laser channel extending along a first direction for laser transmission. The nozzle body has an inner peripheral wall and an outer peripheral wall, and a reservoir for storing lubricating fluid is defined between the inner and outer peripheral walls. The lubricating fluid in the reservoir can permeate to the inner surface of the inner peripheral wall. The laser welding nozzle provided by this utility model has the advantages of high lubricity of the inner surface of the inner peripheral wall, less adhesion of welding spatter, and low nozzle body cleaning frequency.

Description

Technical Field

[0001] This utility model relates to the field of materials processing technology, specifically to a laser welding nozzle. Background Technology

[0002] In related technologies, laser welding of battery components requires a clamping nozzle to ensure a gap-free weld between the two parts. Laser welding nozzles are typically made of copper and are also known as copper nozzles. However, the laser radiation generated during welding heats the nozzle, and spatter from the welding process easily adheres to the heated nozzle, blocking laser light and causing weld defects. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a laser welding nozzle, which has the advantages of high inner surface lubrication of the inner circumferential wall, making it less prone to sticking welding spatter, and requiring low nozzle cleaning frequency.

[0005] The laser welding nozzle of this utility model embodiment includes a nozzle body, the nozzle body having a laser channel extending along a first direction for laser to pass through, the peripheral wall of the nozzle body including an inner peripheral wall and an outer peripheral wall, and a reservoir cavity for storing lubricating fluid is defined between the inner peripheral wall and the outer peripheral wall, the lubricating fluid in the reservoir cavity can permeate to the inner surface of the inner peripheral wall.

[0006] According to the embodiment of the present invention, the laser welding nozzle has a peripheral wall comprising an inner peripheral wall and an outer peripheral wall, with a liquid storage cavity defined between the inner and outer peripheral walls. The lubricant in the liquid storage cavity can penetrate to the inner surface of the inner peripheral wall to form a lubricating layer. During laser welding, the welding spatter first contacts the lubricating layer and slides down before reaching the inner peripheral wall. The welding spatter is less likely to adhere to the inner surface of the inner peripheral wall, thereby effectively reducing the frequency of welding spatter cleaning on the inner surface of the inner peripheral wall and effectively improving welding efficiency.

[0007] In some embodiments, the inner peripheral wall is provided with micropores for the lubricating fluid in the reservoir to permeate to the inner surface of the inner peripheral wall.

[0008] In some embodiments, the pore size of the micropore is d, wherein 0.1 μm ≤ d ≤ 10 μm.

[0009] In some embodiments, the wall thickness of the inner peripheral wall is a, wherein 0.3 mm ≤ a ≤ 0.5 mm.

[0010] In some embodiments, the thickness of the outer peripheral wall is b, where b ≥ 2 mm.

[0011] In some embodiments, the outer peripheral wall is provided with an injection hole that communicates with the liquid storage cavity and is used to inject lubricating fluid into the liquid storage cavity, and the injection hole is sealed by a plug that is detachably installed on the outer peripheral wall.

[0012] In some embodiments, the injection hole is a threaded hole, and the plug is threaded into the injection hole.

[0013] In some embodiments, the liquid storage cavity is provided with a partition, which divides the liquid storage cavity into at least two sub-chambers arranged along the first direction.

[0014] In some embodiments, the partition includes a plurality of annular plates connecting the inner peripheral wall and the outer peripheral wall, and the plurality of annular plates are spaced apart along the first direction.

[0015] In some embodiments, the laser welding nozzle further includes a dust suction component disposed at the top of the nozzle body for sucking up and absorbing dust in the laser channel. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the laser welding nozzle according to an embodiment of the present invention.

[0017] Figure label:

[0018] 1. Nozzle; 11. Inner peripheral wall; 12. Outer peripheral wall; 13. Liquid storage chamber; 131. Sub-chamber; 2. Plug; 14. Partition; 3. Dust collection component. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is combined Figure 1 This invention describes a laser welding nozzle according to an embodiment of the present invention.

[0021] The laser welding nozzle of this utility model embodiment includes a nozzle body 1, which has a laser channel extending along a first direction for laser to pass through. The peripheral wall of the nozzle body 1 includes an inner peripheral wall 11 and an outer peripheral wall 12. A reservoir 13 for storing lubricating fluid is defined between the inner peripheral wall 11 and the outer peripheral wall 12. The lubricating fluid in the reservoir 13 can permeate to the inner surface of the inner peripheral wall 11.

[0022] According to the embodiment of the present invention, the laser welding nozzle is provided with a peripheral wall including an inner peripheral wall 11 and an outer peripheral wall 12, and a liquid storage cavity 13 is defined between the inner peripheral wall 11 and the outer peripheral wall 12. The lubricating liquid in the liquid storage cavity 13 can penetrate to the inner surface of the inner peripheral wall 11 to form a lubricating layer. During the laser welding operation, the welding spatter first contacts the lubricating layer and slides down before reaching the inner peripheral wall 11. The welding spatter is not easy to adhere to the inner surface of the inner peripheral wall 11, thereby effectively reducing the frequency of welding spatter cleaning on the inner surface of the inner peripheral wall 11 and effectively improving the welding efficiency.

[0023] It should be noted that, such as Figure 1 As shown, the liquid storage chamber 13 is an annular chamber, and its width is equal at any position in the vertical direction. Both the inner peripheral wall 11 and the outer peripheral wall 12 are made of copper. The inner surface of the inner peripheral wall 11 is a frustum-shaped surface with a diameter gradually decreasing from bottom to top, which enables the laser channel to focus light and improve welding power. Furthermore, the lubricating oil formed on the inner surface of the inner peripheral wall 11 evaporates and absorbs heat after being irradiated by the laser, thus also helping to cool the nozzle.

[0024] In some embodiments, the inner peripheral wall 11 is provided with micropores for the lubricating fluid in the reservoir 13 to permeate into the inner surface of the inner peripheral wall 11.

[0025] That is, the lubricating oil in the reservoir 13 permeates through the micropores to the inner surface of the inner peripheral wall 11. Compared with other permeation methods, the above arrangement makes the permeation of lubricating oil to the inner surface of the inner peripheral wall 11 more stable and reliable, so as to form a more reliable lubricating film on the inner surface of the inner peripheral wall 11 and more reliably avoid welding spatter from sticking to the inner surface of the inner peripheral wall 11.

[0026] For example, the inner peripheral wall 11 is made of copper foil. After the inner peripheral wall 11 is formed, multiple micropores can be further processed on the inner peripheral wall 11. Alternatively, the inner peripheral wall 11 can be made of porous copper foil (sintered copper foil) with high porosity, so that multiple micropores for lubricant penetration can be automatically formed on it.

[0027] In some embodiments, the pore size of the micropore is d, where 0.1 μm ≤ d ≤ 10 μm.

[0028] By setting the pore size of the micropores to be greater than or equal to 0.1 μm, the lubricant in the reservoir 13 can be effectively ensured to penetrate stably and reliably into the inner surface of the inner peripheral wall 11 through the micropores, thus forming a reliable lubricating film on the inner wall surface of the inner peripheral wall 11. By setting the pore size of the micropores to be less than or equal to 10 μm, excessive lubricant penetration into the inner surface of the inner peripheral wall 11 is effectively prevented from dripping onto the weld surface and affecting the welding effect. At the same time, it also effectively prevents the lubricant in the reservoir 13 from having a shorter service life and increasing the frequency of replenishment, further improving welding efficiency.

[0029] For example, the pore size d of the micropores can be 0.1 μm, 1 μm, 5 μm and 10 μm.

[0030] In some embodiments, the wall thickness of the inner peripheral wall 11 is a, wherein 0.3 mm ≤ a ≤ 0.5 mm.

[0031] By setting the wall thickness of the inner peripheral wall 11 to be greater than or equal to 0.3 mm, sufficient strength is ensured for the inner peripheral wall 11, effectively preventing damage from laser radiation or external impact that could lead to leakage from the liquid storage chamber 13. By setting the wall thickness of the inner peripheral wall 11 to be less than or equal to 0.5 mm, the excessive length of the micropores on the inner peripheral wall 11 is effectively prevented from increasing the probability of blockage, further ensuring the reliability of lubricant penetration into the inner surface of the inner peripheral wall 11.

[0032] For example, the wall thickness of the inner peripheral wall 11 can be 0.3 mm, 0.4 mm, and 0.5 mm.

[0033] In some embodiments, the wall thickness of the outer peripheral wall 12 is b, where b ≥ 2 mm.

[0034] By setting the wall thickness of the outer peripheral wall 12 to be greater than or equal to 2mm, the lubricant is effectively prevented from penetrating to the outer surface of the outer peripheral wall 12, thus avoiding unnecessary loss of lubricant. This effectively increases the replenishment cycle of the liquid storage chamber 13 and improves the efficiency of laser welding.

[0035] For example, the wall thickness b of the outer peripheral wall 12 can be 2 mm, 2.5 mm and 3 mm, and the outer peripheral wall 12 and the inner peripheral wall 11 are made of the same material and are both copper parts.

[0036] In some embodiments, the outer peripheral wall 12 is provided with an injection hole that communicates with the liquid storage cavity 13 and is used to inject lubricating fluid into the liquid storage cavity 13. The injection hole is sealed by a plug 2 that is detachably installed on the outer peripheral wall 12.

[0037] By providing an injection hole, it is convenient to periodically replenish the liquid in the reservoir 13, thereby ensuring the formation of a reliable lubricating film on the inner surface of the inner peripheral wall 11. By providing a plug 2 to seal the injection hole, on the one hand, the lubricating oil in the reservoir 13 is prevented from leaking out of the injection hole by accident, and on the other hand, external impurities are also effectively prevented from entering the reservoir 13 through the injection hole and affecting the penetration of the lubricating oil into the inner surface of the inner peripheral wall 11.

[0038] For example, the injection hole is located at the top of the liquid storage cavity 13 and is a circular hole.

[0039] It should be noted that the nozzle body 1 also includes an annular top plate connecting the upper end of the inner peripheral wall 11 and the upper end of the outer peripheral wall 12, and the injection hole can also be provided on the annular top plate.

[0040] In some embodiments, the injection hole is a threaded hole, and the plug 2 is threaded into the injection hole.

[0041] This makes the connection between the plug 2 and the outer peripheral wall 12 convenient and reliable, and ensures good sealing at the injection hole. Furthermore, it facilitates the disassembly and assembly of the plug 2, making it convenient to periodically replenish the liquid into the storage chamber 13.

[0042] For example, the plug 2 is an internal hexagonal threaded part, that is, the outer surface of the plug 2 is provided with a through hole with a hexagonal cross-section, which facilitates the disassembly and assembly of the plug 2.

[0043] In some embodiments, the liquid storage chamber 13 is provided with a partition 14, which divides the liquid storage chamber 13 into at least two sub-chambers 131 arranged along a first direction.

[0044] At this point, the sub-chambers 131 are not interconnected. Even with some loss of lubricant in each sub-chamber 131, the lubricant will not only penetrate the inner surface of the inner peripheral wall 11. The distribution of lubricant penetrating the inner surface of the inner peripheral wall 11 in the first direction is wider and more uniform, better reducing the probability of welding spatter adhering to the inner surface of the inner peripheral wall 11. Furthermore, this design effectively reduces the lubricant injection cycle of each sub-chamber 131, thereby further improving laser welding efficiency.

[0045] For example, such as Figure 1 As shown, sub-chamber 131 is an annular cavity, and there are four sub-chambers 131 arranged at intervals along the height direction, with each sub-chamber 131 having the same height. At this time, the number of sub-chambers 131 is equal to the number of injection holes and corresponds one-to-one with each other.

[0046] Optionally, the partition 14 includes multiple annular plates connecting the inner peripheral wall 11 and the outer peripheral wall 12, with the multiple annular plates spaced apart along the first direction. In this case, there are at least three sub-chambers 131, thereby ensuring a wider and more uniform distribution area of ​​lubricating fluid permeating from the inner surface of the inner peripheral wall 11, while further increasing the fluid replenishment cycle of each sub-chamber 131, and further improving the laser welding efficiency.

[0047] For example, each annular plate has the same width. The annular plate can be welded to one of the inner peripheral wall 11 and the outer peripheral wall 12, and pressed to the other of the inner peripheral wall 11 and the outer peripheral wall 12. This facilitates the assembly of the nozzle body 1 and also improves the sealing performance of the connection between each of the inner peripheral wall 11 and the outer peripheral wall 12 and the annular plate.

[0048] In some embodiments, the laser welding nozzle further includes a dust suction component 3, which is disposed at the top of the nozzle body 1 for sucking up and absorbing dust in the laser channel.

[0049] The dust collection component 3 defines a dust collection channel that is connected to the laser channel. The dust collection component 3 is used to connect to an external dust collection mechanism. The dust collection mechanism uses the dust collection component 3 to suck up the dust in the laser channel, effectively preventing the smoke and dust in the laser channel from blocking the laser and affecting the welding effect.

[0050] It should be noted that the laser welding nozzle in this embodiment eliminates the arrangement of the protective gas, so as to effectively reduce the cost of the laser welding nozzle.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., 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 this utility model and simplifying the description, and are not intended to 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 utility model.

[0052] 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A laser welding nozzle, characterized in that, Includes a mouthpiece (1) having a laser channel extending in a first direction for laser to pass through, the peripheral wall of the mouthpiece (1) including an inner peripheral wall (11) and an outer peripheral wall (12), a reservoir cavity (13) for storing lubricating fluid is defined between the inner peripheral wall (11) and the outer peripheral wall (12), the lubricating fluid in the reservoir cavity (13) being permeable to the inner surface of the inner peripheral wall (11).

2. The laser welding nozzle according to claim 1, characterized in that, The inner peripheral wall (11) is provided with micropores for the lubricating fluid in the reservoir (13) to permeate into the inner surface of the inner peripheral wall (11).

3. The laser welding nozzle according to claim 2, characterized in that, The pore size of the micropore is d, where 0.1μm≤d≤10μm.

4. The laser welding nozzle according to claim 1, characterized in that, The thickness of the inner peripheral wall (11) is a, wherein 0.3mm≤a≤0.5mm.

5. The laser welding nozzle according to claim 1, characterized in that, The thickness of the outer peripheral wall (12) is b, where b ≥ 2 mm.

6. The laser welding nozzle according to claim 1, characterized in that, The outer peripheral wall (12) is provided with an injection hole that communicates with the liquid storage cavity (13) and is used to inject lubricating fluid into the liquid storage cavity (13). The injection hole is sealed by a plug (2) that is detachably installed on the outer peripheral wall (12).

7. The laser welding nozzle according to claim 6, characterized in that, The injection hole is a threaded hole, and the plug (2) is threaded into the injection hole.

8. The laser welding nozzle according to claim 1, characterized in that, The liquid storage chamber (13) is provided with a partition (14), which divides the liquid storage chamber (13) into at least two sub-chambers (131) arranged along the first direction.

9. The laser welding nozzle according to claim 8, characterized in that, The partition (14) includes a plurality of annular plates, which connect the inner peripheral wall (11) and the outer peripheral wall (12), and the plurality of annular plates are arranged at intervals along the first direction.

10. The laser welding nozzle according to any one of claims 1-9, characterized in that, The laser welding nozzle also includes a dust suction component (3), which is disposed on the top of the nozzle body (1) for sucking up and absorbing dust in the laser channel.

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