Welding protection cap and welding assembly
By using a split-type welding protection cover, only the lower half of the cover needs to be replaced, which solves the problems of complex structure and high cost of integral welding protection covers, and achieves effective nitrogen protection and improved welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU LONGHE TECHNOLOGY CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-03
AI Technical Summary
Existing integral welded protective covers have complex structures, are difficult to manufacture, are costly, and cannot provide effective nitrogen protection.
The welding protective cover adopts a split design, including first and second protective covers, and the laser channel and protective gas channel are set in sections. Only the lower half of the protective cover needs to be replaced to reduce costs, and effective nitrogen protection is achieved by independently designing the size of the air inlet and outlet.
It reduces the replacement cost of the protective cover, improves welding quality and nitrogen protection effect, simplifies processing difficulty, and achieves nitrogen protection with large air intake and small air output.
Smart Images
Figure CN224444956U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding technology, and more particularly to welding protective covers and welding assemblies. Background Technology
[0002] During the lithium battery manufacturing process, the battery cell connecting piece and the battery cover plate need to be laser welded together to make the positive and negative terminals of the battery cover plate conductive to the battery cell.
[0003] In related technologies, an integral protective cover is used to press the connecting piece and the cover plate together from top to bottom, eliminating the gap between them. Then, a laser beam passes through the gap in the protective cover and irradiates the surface of the connecting piece, causing the laser-irradiated areas of the connecting piece and the cover plate to fuse together, achieving the welding purpose. Furthermore, the protective cover typically also has a nitrogen gas channel and a dust removal channel. The protective cover mainly serves the following functions: 1. Pressing down on the connecting piece and the cover plate to eliminate the gap between them; 2. Enclosing the welding area to limit laser spatter from the welding process to the outside; 3. Providing nitrogen protection and dust removal.
[0004] However, the structure of the aforementioned integral protective cover is complex and difficult to manufacture, and the replacement cost of the protective cover is high. In order to reduce the manufacturing cost, milling is generally used. However, this manufacturing method cannot achieve a nitrogen channel with a large nitrogen inlet and a small nitrogen outlet at the same time to ensure a large nitrogen intake and avoid the nitrogen output being carried away by the dust removal airflow, thus failing to achieve effective nitrogen protection. Utility Model Content
[0005] To address or partially address the problems existing in related technologies, this application provides a welding protective cover and welding assembly. By designing the protective cover in upper and lower sections, it is possible to reduce costs by replacing only the lower half of the protective cover. Furthermore, the protective gas channel can also be designed in sections with a large inlet and a small outlet to achieve effective nitrogen protection.
[0006] The first aspect of this application provides a welding protective cover, comprising:
[0007] The first protective cover has a first laser channel and a first protective gas channel that are not interconnected.
[0008] The second protective cover is detachably connected to one side of the first protective cover along the laser transmission direction, and the second protective cover has a through-hole provided with a second laser channel and a second protective gas channel that are interconnected. The second laser channel is connected to the first laser channel, and the second protective gas channel is connected to the first protective gas channel. The first gas inlet of the first protective gas channel is larger than the second gas outlet of the second protective gas channel.
[0009] As an optional embodiment, the cross-section of the second protective gas channel gradually decreases along the protective gas transmission direction.
[0010] As an optional embodiment, the first protective gas channel is inclined relative to the first gas inlet direction of the first protective gas channel; the second protective gas channel is inclined relative to the first gas outlet direction of the first protective gas channel.
[0011] As an optional embodiment, the first protective cover is further provided with a first dust removal channel, which is not connected to the first laser channel and the first protective gas channel; the second protective cover is further provided with a second dust removal channel, which is connected to the first dust removal channel and is also connected to the second laser channel.
[0012] As an optional embodiment, the second dust removal channel is connected to the first dust removal channel to form a main dust removal channel, and the main dust removal channel is inclined relative to the dust removal outlet direction of the first dust removal channel.
[0013] As an optional embodiment, the first protective cover includes a first cover body and a connecting cover protruding from one side of the first cover body along the laser transmission direction, the cross-section of the connecting cover gradually decreasing along the laser transmission direction; the second protective cover is disposed on the connecting cover, and the size of the second protective cover matches the side of the connecting cover away from the first cover body.
[0014] As an optional embodiment, the second protective cover includes a second cover body and a protrusion protruding from the middle of the second cover body along the laser transmission direction. The second cover body is disposed on one side of the first protective cover, and the second laser channel passes through the protrusion.
[0015] A second aspect of this application provides a welding assembly, including a base and the aforementioned welding protective cover, wherein the first protective cover is disposed on one side of the base away from the second protective cover; and a third laser channel and a third protective gas channel are provided through the base and are not interconnected, wherein the third laser channel is connected to the first laser channel and the third protective gas channel is connected to the first protective gas channel.
[0016] As an optional embodiment, the base has connection holes on the two sides opposite to the first protective cover, and the welding protective cover also includes a connector, the two ends of which are respectively inserted into the two connection holes opposite to the first protective cover.
[0017] As an optional embodiment, mounting holes are provided on the two sides of the base opposite to the first protective cover. The welding protective cover also includes an elastic element, with its two ends respectively disposed in the two mounting holes opposite to the base and the first protective cover. The elastic element is compressed when the base and the first protective cover are connected, and recovers its elasticity when the base and the first protective cover are separated.
[0018] The technical solution provided in this application may include the following beneficial results:
[0019] During welding, the welding laser enters through the first laser channel and then passes through the second laser channel to reach the welding area, where it welds the workpiece. Shielding gas enters through the first shielding gas channel and then passes through the second shielding gas channel to reach the welding area, protecting the workpiece. The protective cover of this application adopts a split design; only the second protective cover is affected by laser spatter, requiring only the replacement of the second cover, significantly reducing replacement costs. Furthermore, because the protective cover adopts a split design, the first gas inlet (the inlet of the first shielding gas channel) and the second gas outlet (the outlet of the second shielding gas channel) can be processed independently. This allows the inlet and outlet to have different sizes; a larger inlet ensures a larger intake of shielding gas, while a smaller outlet prevents excessive shielding gas from being carried away by the dust removal airflow, thus achieving effective nitrogen protection and improving welding quality.
[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0021] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.
[0022] Figure 1 This is a schematic diagram of the bottom structure of the welding protective cover shown in an embodiment of this application;
[0023] Figure 2 This is a schematic diagram of the front structure of the welding protective cover shown in an embodiment of this application;
[0024] Figure 3 This is an exploded view of the welding assembly shown in the embodiments of this application;
[0025] Figure 4 This is a schematic diagram of the welding assembly shown in the embodiments of this application;
[0026] Figure 5This is a cross-sectional view of the welding assembly shown in an embodiment of this application;
[0027] Figure 6 This is a cross-sectional view of the protective gas channel of the welding assembly shown in an embodiment of this application.
[0028] Figure label:
[0029] 1. First protective cover; 10. First laser channel; 11. First protective gas channel; 110. First gas inlet; 111. First gas outlet; 12. First dust removal channel; 120. Dust removal outlet; 13. First cover body; 14. Connecting cover; 2. Second protective cover; 20. Second laser channel; 21. Second protective gas channel; 210. Second gas outlet; 22. Second dust removal channel; 23. Second cover body; 24. Protrusion; 3. Base; 30. Third laser channel; 31. Third protective gas channel; 32. Connecting hole; 33. Mounting hole; 34. Third dust removal channel; 4. Connecting piece; 5. Elastic element. Detailed Implementation
[0030] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.
[0031] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0032] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.
[0033] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0034] In related technologies, an integral protective cover is used to press the connecting piece and the cover plate together from top to bottom, eliminating the gap between them. Then, a laser beam passes through the gap in the protective cover and irradiates the surface of the connecting piece, causing the laser-irradiated areas of the connecting piece and the cover plate to fuse together, achieving the welding purpose. Furthermore, the protective cover typically also has a nitrogen gas channel and a dust removal channel. The protective cover mainly serves the following functions: 1. Pressing down on the connecting piece and the cover plate to eliminate the gap between them; 2. Enclosing the welding area to limit laser spatter from the welding process to the outside; 3. Providing nitrogen protection and dust removal.
[0035] However, the structure of the aforementioned integral protective cover is complex and difficult to manufacture, and the replacement cost of the protective cover is high. In order to reduce the manufacturing cost, milling is generally used. However, this manufacturing method cannot achieve a nitrogen channel with a large nitrogen inlet and a small nitrogen outlet at the same time to ensure a large nitrogen intake and avoid the nitrogen output being carried away by the dust removal airflow, thus failing to achieve effective nitrogen protection.
[0036] To address the aforementioned issues, this application provides a welding protective cover that reduces costs by allowing only the lower half of the cover to be replaced through a segmented design. Furthermore, the protective gas channel is also segmented, with a large inlet and a small outlet, thus achieving effective nitrogen protection.
[0037] See Figure 1 and Figure 2This application provides a welding protective cover, including a first protective cover 1 and a second protective cover 2. In use, the first protective cover 1 can be positioned above the second protective cover 2. The first protective cover 1 has a through-hole first laser channel 10 and a first protective gas channel 11 that are not interconnected. The welding laser enters through the first laser channel 10, and the protective gas, such as nitrogen, enters through the first protective gas channel 11. Since the first laser channel 10 and the first protective gas channel 11 are not interconnected, the incident laser and the introduced protective gas are independent and do not interfere with each other. The second protective cover 2 is detachably connected to one side of the first protective cover 1 along the laser transmission direction, so that the first protective cover 1 and the second protective cover 2 can be processed separately, and the second protective cover 2 can be easily disassembled and replaced. During welding, a second protective cover 2 can be positioned downstream of the first protective cover 1 along the laser transmission direction. Since welding spatter often only reaches the lower half of the protective cover during welding, when a protective cover reaches its service life, only the lower half is actually worn. By changing the protective cover from a single-part structure to a composite structure where the first protective cover 1 and the second protective cover 2 are detachably connected, only the second protective cover 2 is affected by laser spatter. Only the second protective cover 2 needs to be replaced, significantly reducing replacement costs. Furthermore, the second protective cover 2 has a through-hole, interconnected second laser channel 20 and second protective gas channel 21. The second laser channel 20 is connected to the first laser channel 10, and the second protective gas channel 21 is connected to the first protective gas channel 11. On one hand, the welding laser enters through the first laser channel 10 and then passes through the second laser channel 20 to reach the welding area, where it welds the components. The shielding gas enters through the first shielding gas channel 11 and then passes through the second shielding gas channel 21 to reach the welding area, protecting the components. On the other hand, since the second laser channel 20 and the second shielding gas channel 21 are interconnected, and the outlet of the second shielding gas channel 21 is generally much smaller than the outlet of the second laser channel 20, the shielding gas can share the same outlet with the laser channel, improving the integration of the protective cover and further reducing the complexity of the protective cover structure and the difficulty of processing. See also... Figure 5 and Figure 6The first gas inlet 110 of the first protective gas channel 11 is larger than the second gas outlet 210 of the second protective gas channel 21. That is, the protective cover of this embodiment simultaneously has a large protective gas inlet (e.g., 6mm in diameter) and a small protective gas outlet (e.g., 1mm in diameter). The large inlet ensures a large intake of protective gas, while the small outlet prevents excessive protective gas from being carried away by the dust removal airflow, thus achieving effective nitrogen protection. Furthermore, because the protective cover of this embodiment adopts a split design, the first gas inlet 110 of the first protective gas channel 11 (the protective gas inlet) and the second gas outlet 210 of the second protective gas channel 21 (the protective gas outlet) can be processed separately and independently, thereby achieving different sizes for the protective gas inlet and outlet, improving welding quality.
[0038] During welding, the welding laser enters through the first laser channel 10 and then passes through the second laser channel 20 to reach the welding area, where it welds the workpiece. The shielding gas enters through the first shielding gas channel 11 and then passes through the second shielding gas channel 21 to reach the welding area, protecting the workpiece. In this embodiment, the protective cover adopts a split design; only the second protective cover 2 is affected by laser spatter, requiring only the replacement of the second protective cover 2, significantly reducing replacement costs. Furthermore, because the protective cover in this embodiment adopts a split design, the first gas inlet 110 of the first shielding gas channel 11 (the shielding gas inlet) and the second gas outlet 210 of the second shielding gas channel 21 (the shielding gas outlet) can be processed separately and independently. This allows the shielding gas inlet and outlet to have different sizes. A larger inlet ensures a larger intake of shielding gas, while a smaller outlet prevents excessive shielding gas from being carried away by the dust removal airflow, thus achieving effective nitrogen protection and improving welding quality.
[0039] As an optional embodiment, see Figure 5 and Figure 6 The cross-section of the second protective gas channel 21 gradually decreases along the protective gas transmission direction.
[0040] In this embodiment, the second protective gas channel 21 can be cylindrical, and the cross-section of the second protective gas channel 21 can be circular. The circular cross-section of the second protective gas channel 21 gradually decreases along the protective gas transmission direction, which means that the diameter of the second protective gas channel 21 gradually decreases along the protective gas transmission direction.
[0041] This configuration ensures that the intake volume of protective gas into the second protective gas channel 21 is comparable to the gas flow rate into the first protective gas channel 11, without affecting the gas flow rate into the second protective gas channel 21. At the same time, it makes the gas flow rate of protective gas output from the second protective gas channel 21 to the welding area more concentrated and the gas flow is output slowly, achieving more effective nitrogen protection.
[0042] Because the protective cover of this application embodiment is designed with a layered structure, the depth of processing is reduced, while allowing for changes in the diameter or bends of the channels.
[0043] As an optional embodiment, see Figure 5 and Figure 6 The first protective gas channel 11 is inclined relative to the first gas inlet 110 of the first protective gas channel 11; the second protective gas channel 21 is inclined relative to the first gas outlet 111 of the first protective gas channel 11.
[0044] In this embodiment, both the first protective gas channel 11 and the second protective gas channel 21 are inclined, which can reduce the processing thickness of the protective cover while ensuring that the size of the protective gas channel remains unchanged.
[0045] As a preferred embodiment, the inclination direction of the second protective gas channel 21 is the same as that of the first protective gas channel 11, which can ensure that the protective gas can smoothly enter the second protective gas channel 21 from the first protective gas channel 11 and reduce the processing difficulty.
[0046] See Figure 6 When the second protective gas channel 21 is set at an angle, the size of the first gas inlet 110 of the first protective gas channel 11 can be identified by the diameter a, which can be 6mm; the size of the second gas outlet 210 of the second protective gas channel 21 can be identified by the height b and the diameter c, which can be 4.3mm and c can be 2.5mm.
[0047] Furthermore, the tilt angles of the first protective gas channel 11 and the second protective gas channel 21 are both acute angles to the laser transmission direction.
[0048] In this embodiment, the laser transmission direction can be vertically downward, and both the first laser channel 10 and the second laser channel 20 can be vertically arranged, allowing the laser to be aimed at the welding area. The tilt angles of the first protective gas channel 11 and the second protective gas channel 21 are both acute angles to the laser transmission direction, which can further improve the integration of the protective cover and reduce its size.
[0049] As an optional embodiment, see Figure 5The first protective cover 1 is also provided with a first dust removal channel 12, which is not connected to the first laser channel 10 and the first protective gas channel 11; the second protective cover 2 is also provided with a second dust removal channel 22, which is connected to the first dust removal channel 12 and is also connected to the second laser channel 20.
[0050] In this embodiment, since the first dust removal channel 12 is not connected to either the first laser channel 10 or the first protective gas channel 11, the incident laser and the introduced protective gas are unaffected by the dust removal negative pressure. The second dust removal channel 22 is connected to the first dust removal channel 12, allowing residue generated in the welding area to be drawn away through the second dust removal channel 22 and then back through the first dust removal channel 12. The second dust removal channel 22 is also connected to the second laser channel 20, allowing them to share a common outlet, and residue in the welding area can also be discharged through the second laser channel 20.
[0051] As a preferred embodiment, see Figure 5 The second dust removal channel 22 is connected to the first dust removal channel 12 to form the main dust removal channel. The main dust removal channel is inclined relative to the dust removal outlet 120 of the first dust removal channel 12.
[0052] In this embodiment, the main dust removal channel is inclined, which can reduce the processing thickness of the protective cover and reduce the processing difficulty while ensuring that the size of the dust removal channel remains unchanged.
[0053] Furthermore, the tilt angle of the main dust removal channel is acute to the laser transmission direction.
[0054] In this embodiment, the tilt angle of the main dust removal channel is acute to the laser transmission direction, which can further improve the integration of the protective cover and reduce its size.
[0055] As an optional embodiment, see Figure 1 The first protective cover 1 includes a first cover body 13 and a connecting cover 14 protruding from one side of the first cover body 13 along the laser transmission direction. The cross-section of the connecting cover 14 gradually decreases along the laser transmission direction. The second protective cover 2 is disposed on the connecting cover 14, and the size of the second protective cover 2 matches the side of the connecting cover 14 away from the first cover body 13.
[0056] In this embodiment, since the first cover 13 serves to support the connecting cover 14 and the second protective cover 2, its length can be greater than that of the connecting cover 14. The connecting cover 14 mainly serves to open the first laser channel 10 and the first protective gas channel 11. The cross-section of the connecting cover 14 gradually decreases along the laser transmission direction, which can reduce the distance between the first laser channel 10 and the first protective gas channel 11, improve the integration of the protective cover, and reduce the processing difficulty. The size of the second protective cover 2 matches the side of the connecting cover 14 away from the first cover 13, that is, the size of the second protective cover 2 is the same as that of the connecting cover 14. This can reduce the production cost of the second protective cover 2, thereby reducing the replacement cost.
[0057] As an optional embodiment, see Figure 1 The second protective cover 2 includes a second cover body 23 and a protrusion 24 protruding from the middle of the second cover body 23 along the laser transmission direction. The second cover body 23 is located on one side of the first protective cover 1, and the second laser channel 20 passes through the protrusion 24.
[0058] In this embodiment, the protrusion 24 is used to press the connecting piece, thereby eliminating the gap between the connecting piece and the cover plate, sealing the welding area to limit the laser spatter generated during welding to the external area, and controlling the gas flow in the welding area.
[0059] Corresponding to the aforementioned application function implementation device embodiments, this application also provides a welding assembly and corresponding embodiments.
[0060] See Figure 3 and Figure 4 This application provides a welding assembly, including a base 3 and the aforementioned welding protective cover. The side of the first protective cover 1 away from the second protective cover 2 is located on one side of the base 3. The base 3 is provided with a third laser channel 30 and a third protective gas channel 31 that are not interconnected. The third laser channel 30 is connected to the first laser channel 10, and the third protective gas channel 31 is connected to the first protective gas channel 11.
[0061] During operation, the battery to be welded reaches below the welding assembly, and then the protective cover is pressed down. At this time, the second protective cover 2 contacts the connecting piece on the battery, pressing the connecting piece tightly against the battery cover plate below it. Next, nitrogen gas enters through the third protective gas channel 31, and then through the first protective gas channel 11 and the second protective gas channel 21 to cover the welding area. Finally, the laser passes through the third laser channel 30, through the first laser channel 10 and the second laser channel 20, and irradiates the welding area, causing the connecting piece and the cover plate to be welded together.
[0062] As an optional embodiment, see Figure 3The base 3 and the first protective cover 1 have connection holes 32 on their opposite sides. The welding protective cover also includes a connector 4, with both ends of the connector 4 inserted into the two connection holes 32 opposite to the base 3 and the first protective cover 1.
[0063] In this embodiment, the connector 4 can be a pin shaft, with both ends of the pin shaft inserted into two connecting holes 32 opposite to the base 3 and the first protective cover 1, connecting the base 3 and the first protective cover 1.
[0064] As an optional embodiment, see Figure 3 Mounting holes 33 are provided on the two sides of the base 3 opposite to the first protective cover 1. The welding protective cover also includes an elastic element 5. The two ends of the elastic element 5 are respectively provided in the two mounting holes 33 opposite to the base 3 and the first protective cover 1. The elastic element 5 is compressed when the base 3 and the first protective cover 1 are connected, and recovers its elasticity when the base 3 and the first protective cover 1 are separated.
[0065] In this embodiment, the elastic element 5 can be a compression spring. The compression spring is disposed in the mounting holes 33 opened on the two sides opposite to the base 3 and the first protective cover 1, so that the first protective cover 1 can float up and down in the base 3, thereby realizing the elastic connection between the first protective cover 1 and the base 3.
[0066] As an optional embodiment, see Figure 5 A third dust removal channel 34 is also provided through the base 3. The third dust removal channel 34 is not connected to the third laser channel 30 and the third protective gas channel 31, but is connected to the second dust removal channel 22.
[0067] In this embodiment of the application, negative pressure is also applied to the third dust removal channel 34 to suck away the waste slag generated during welding through the dust removal channel.
[0068] The solution of this application has been described in detail above with reference to the accompanying drawings. 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. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.
[0069] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A welding shield characterized by, include: The first protective cover (1) has a first laser channel (10) and a first protective gas channel (11) that are not interconnected. The second protective cover (2) is detachably connected to one side of the first protective cover (1) along the laser transmission direction, and the second protective cover (2) is provided with a second laser channel (20) and a second protective gas channel (21) that are interconnected. The second laser channel (20) is connected to the first laser channel (10), and the second protective gas channel (21) is connected to the first protective gas channel (11). The first gas inlet (110) of the first protective gas channel (11) is larger than the second gas outlet (210) of the second protective gas channel (21).
2. The welding boot cover of claim 1, wherein, The cross-section of the second protective gas channel (21) gradually decreases along the protective gas transmission direction.
3. The welding boot cover of claim 1, wherein, The first protective gas channel (11) is inclined relative to the first gas inlet (110) of the first protective gas channel (11); the second protective gas channel (21) is inclined relative to the first gas outlet (111) of the first protective gas channel (11).
4. The welding boot cover of claim 1, wherein, The first protective cover (1) is also provided with a first dust removal channel (12) through it. The first dust removal channel (12) is not connected to the first laser channel (10) and the first protective gas channel (11). The second protective cover (2) is also provided with a second dust removal channel (22) through it. The second dust removal channel (22) is connected to the first dust removal channel (12), and the second dust removal channel (22) is also connected to the second laser channel (20).
5. The welding boot cover of claim 4, wherein, The second dust removal channel (22) is connected to the first dust removal channel (12) to form a main dust removal channel. The main dust removal channel is inclined relative to the dust removal outlet (120) of the first dust removal channel (12).
6. The welding boot cover of claim 1, wherein, The first protective cover (1) includes a first cover body (13) and a connecting cover (14) protruding from one side of the first cover body (13) along the laser transmission direction. The cross section of the connecting cover (14) gradually decreases along the laser transmission direction. The second protective cover (2) is disposed on the connecting cover (14), and the size of the second protective cover (2) matches the side of the connecting cover (14) away from the first cover body (13).
7. The welding boot cover of claim 1, wherein, The second protective cover (2) includes a second cover body (23) and a protrusion (24) protruding from the middle of the second cover body (23) along the laser transmission direction. The second cover body (23) is located on one side of the first protective cover (1), and the second laser channel (20) passes through the protrusion (24).
8. A welding assembly characterized by, The base (3) includes a welding protective cover as described in any one of claims 1 to 7, wherein the first protective cover (1) is disposed on one side of the base (3) away from the second protective cover (2); and a third laser channel (30) and a third protective gas channel (31) are provided through the base (3) and are not interconnected, wherein the third laser channel (30) is connected to the first laser channel (10) and the third protective gas channel (31) is connected to the first protective gas channel (11).
9. The welding assembly of claim 8, wherein, The base (3) has connection holes (32) on both sides opposite to the first protective cover (1). The welding protective cover also includes a connector (4), and the two ends of the connector (4) are respectively inserted into the two connection holes (32) opposite to the base (3) and the first protective cover (1).
10. The welding assembly of claim 8, wherein, The base (3) has mounting holes (33) on both sides opposite to the first protective cover (1). The welding protective cover also includes an elastic element (5). The two ends of the elastic element (5) are respectively located in the two mounting holes (33) opposite to the base (3) and the first protective cover (1). The elastic element (5) is compressed when the base (3) is connected to the first protective cover (1) and recovers its elasticity when the base (3) is separated from the first protective cover (1).