A welding auxiliary device and a welding apparatus

Abstract

This invention provides a welding auxiliary device and a welding apparatus. The welding auxiliary device includes a gas storage component; a first channel is formed on the gas storage component, configured to allow a laser to pass through and point towards the workpiece to be welded; a gas storage cavity is also formed on the gas storage component surrounding the first channel, configured to contain a protective gas, and multiple spaced-apart gas outlets are formed on the sidewall of the gas storage cavity, all facing the workpiece to be welded. This invention aims to solve the technical problem in related technologies where the protective gas cannot uniformly protect multiple weld points, leading to abnormal oxidation of the weld points.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to a welding auxiliary device and a welding apparatus. Background Technology

[0002] In related technologies, to ensure the quality of laser welding, the production line introduces inert gases such as nitrogen or argon during the laser welding process at the injection port to blow gas onto the laser welding area. This prevents oxidation of the welding area caused by laser heat and avoids the formation of pinholes. During the laser welding of sealing nails, the shielding gas blowing zero point is aligned with the laser emission zero point, emitted along the same Y-axis, and blown directly onto the welding plane. However, this vertical blowing of the shielding gas onto the plane can easily lead to uneven shielding gas flow across each welding point, causing blackening and weld spalling abnormalities. Utility Model Content

[0003] The embodiments of this utility model provide a welding auxiliary device and a welding device, which aim to solve the technical problem in the related art that the shielding gas cannot uniformly protect multiple weld points, resulting in abnormal oxidation of the weld points.

[0004] In a first aspect, embodiments of the present invention provide a welding auxiliary device, including a gas storage component;

[0005] A first channel is formed on the gas storage component, and the first channel is configured to allow the laser to pass through and point to the workpiece to be welded.

[0006] The gas storage component also has a gas storage cavity surrounding the first channel. The gas storage cavity is configured to contain protective gas. Multiple spaced-out gas outlets are formed on the side wall of the gas storage cavity, and the multiple gas outlets face the workpiece to be welded.

[0007] In some embodiments, a portion to be welded is formed on the workpiece to be welded;

[0008] The first outlet end of the first channel extends above the area to be welded, and the orthographic projection of the first outlet end on the workpiece to be welded covers the area to be welded.

[0009] In some embodiments, the sidewall includes an inner sidewall and an outer sidewall, the inner sidewall being disposed close to the first channel, and a plurality of air outlets being formed on the inner sidewall.

[0010] In some embodiments, the welding auxiliary device further includes a plurality of air blowing components, one end of each air blowing component being connected to the air outlet, and the other end of the air blowing component facing the workpiece to be welded.

[0011] In some embodiments, the blowing assembly includes:

[0012] An air blowing connector is configured to face the workpiece to be welded; and,

[0013] The air guide tube is connected at one end to the air outlet and at the other end to the air blowing connector. The air guide tube is telescopic to adjust the position of the air blowing connector.

[0014] In some embodiments, the air outlet has an internal thread, the air guide branch has an external thread, and the air guide branch is connected to the air storage device through the external thread and the internal thread.

[0015] In some embodiments, a snap-fit ​​groove is formed at the end of the air guide tube away from the air outlet;

[0016] The air blowing connector includes a rotating part and an air outlet, the rotating part being rotatably mounted in a snap-fit ​​groove to adjust the angle of the air outlet.

[0017] In some embodiments, the air outlet has an air outlet surface, and the angle between the plane where the air outlet surface is located and the plane where the workpiece to be welded is located is α, where 0°≤α<90°.

[0018] In some embodiments, 30°≤α≤45°.

[0019] In some embodiments, the welding aid further includes a guide having a second channel formed therein, the second channel being configured to allow laser and shielding gas to pass through and be directed toward the workpiece to be welded.

[0020] In some embodiments, an angle is formed between the axis of the second channel and the axis of the air outlet, such that the air outlet directions of the second channel and the air outlet are different.

[0021] In some embodiments, the gas storage chamber and the second channel are connected so that the protective gas can flow from the second channel to the gas storage chamber.

[0022] In some embodiments, the guide includes:

[0023] The main body portion has the second channel formed therein; and,

[0024] At least one air guide section is provided, forming an air guide channel. One end of the air guide channel is connected to the air storage chamber, and the other end of the air guide channel is connected to the second channel.

[0025] In some embodiments, each of the air guides includes a first air guide pipe and a second air guide pipe connected together. The first air guide pipe is connected to the air storage chamber, and the second air guide pipe is connected to the second channel. An angle is formed between the first air guide pipe and the second air guide pipe to allow adjustment of the position of the main body.

[0026] Secondly, embodiments of this utility model provide a welding apparatus, including the aforementioned welding auxiliary apparatus.

[0027] The beneficial effects of the embodiments of this utility model are as follows:

[0028] In the technical solution of this utility model, a first channel is formed on the gas storage component. The first channel is configured to allow the laser to pass through and point towards the workpiece to be welded. The first channel can play a guiding role in guiding the laser. A gas storage cavity is also formed on the gas storage component surrounding the first channel. The gas storage cavity is configured to contain protective gas. Multiple gas outlets are formed on the side wall of the gas storage cavity at intervals. The multiple gas outlets face the workpiece to be welded. The gas storage cavity surrounds the first channel, so that when the laser is working, the protective gas can surround the laser, thereby avoiding oxidation reaction. The multiple gas outlets can release protective gas from multiple positions, so that the protective gas completely covers the workpiece to be welded, protecting the workpiece and preventing it from being oxidized. This solves the technical problem in related technologies where the protective gas cannot uniformly protect multiple weld points, resulting in abnormal oxidation of the weld points. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional schematic diagram of a welding auxiliary device provided in some embodiments of this utility model;

[0031] Figure 2 yes Figure 1 Schematic diagram of the gas storage unit

[0032] Figure 3 yes Figure 1 Schematic diagram of the air blowing assembly;

[0033] Figure 4 yes Figure 1 A schematic diagram of the structure of the gas storage unit and the gas blowing assembly;

[0034] Figure 5 yes Figure 1 A schematic diagram of the structure of the central air guide component.

[0035] Explanation of icon numbers

[0036] 100. Welding auxiliary device; 10. Gas storage component; 11. First channel; 12. First outlet end; 12. Gas storage chamber; 121. Inner wall; 122. Outer wall; 13. Gas outlet; 20. Air blowing assembly; 21. Air blowing connector; 211. Rotating part; 212. Air outlet nozzle; 22. Air guide branch pipe; 30. Guide component; 31. Second channel; 32. Body part; 33. Air guiding part; 331. First air guide pipe; 332. Second air guide pipe. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0038] The lithium battery manufacturing process mainly consists of slurry preparation, coating, rolling, stacking or winding, assembly, liquid injection, formation, helium injection at the liquid injection port, glue pinning at the liquid injection port, laser welding to seal the liquid injection port, electrical performance screening, and packaging.

[0039] The quality of the laser welding of the filling port seal directly affects the battery's sealing performance. If welding abnormalities cause pinholes in the filling port welding area, resulting in poor sealing, there is a risk that the electrolyte inside the battery will leak out of the filling port, ultimately leading to thermal runaway of the battery.

[0040] In related technologies, to ensure the quality of laser welding, the production line introduces inert gases such as nitrogen or argon during the laser welding process at the injection port to blow gas onto the laser welding area. This prevents oxidation of the welding area caused by laser heat and avoids the formation of pinholes. During the laser welding of sealing nails, the shielding gas blowing zero point is aligned with the laser emission zero point, emitted along the same Y-axis, and blown directly onto the welding plane. However, this vertical blowing of the shielding gas onto the plane can easily lead to uneven shielding gas flow across each welding point, causing blackening and weld spalling abnormalities.

[0041] In view of this, the present invention proposes a... Figures 1 to 5This is a schematic diagram of an embodiment of the welding auxiliary device 100 provided by the present invention. The welding auxiliary device 100 provided by the present invention can protect the area to be welded in all directions and prevent the area to be welded from being oxidized during the welding process. The welding auxiliary device 100 will be described in detail below with reference to the main drawings.

[0042] Please see Figure 1 and Figure 2 This application provides a welding auxiliary device 100, which is used to guide the protective gas to the area to be welded, so that the protective gas fills the area to be welded, protects the area to be welded, and prevents the area to be welded from oxidation reaction due to high temperature, which could lead to welding failure.

[0043] In some embodiments, the welding auxiliary device 100 includes a gas storage member 10; a first channel 11 is formed on the gas storage member 10, the first channel 11 is configured to allow a laser to pass through and point towards the workpiece to be welded; a gas storage cavity 12 surrounding the first channel 11 is also formed on the gas storage member 10, the gas storage cavity 12 is configured to contain a protective gas, and a plurality of spaced-apart gas outlets 13 are formed on the sidewall of the gas storage cavity 12, the plurality of gas outlets 13 facing the workpiece to be welded.

[0044] In the technical solution of this utility model, a first channel 11 is formed on the gas storage component 10. The first channel 11 is configured to allow the laser to pass through and point towards the workpiece to be welded. The first channel 11 can play a guiding role and guide the laser. A gas storage cavity 12 is also formed on the gas storage component 10, surrounding the first channel 11. The gas storage cavity 12 is configured to contain protective gas. Multiple gas outlets 13 are formed on the side wall of the gas storage cavity 12 at intervals. The multiple gas outlets 13 face the workpiece to be welded. The gas storage cavity 12 surrounds the first channel 11, so that when the laser is working, the protective gas can surround the laser, thereby avoiding oxidation reaction. There are multiple gas outlets 13. The multiple gas outlets 13 can release protective gas from multiple positions, so that the protective gas completely covers the workpiece to be welded, protects the workpiece to be welded, and avoids the workpiece to be welded from oxidation. This solves the technical problem in the related technology that the protective gas cannot uniformly protect multiple weld points, resulting in abnormal oxidation of the weld points.

[0045] Laser welding works by using a high-energy-density laser beam to irradiate the surface of the workpiece, converting light energy into heat energy to locally melt or vaporize the material, thus achieving welding. When the laser comes into contact with the surface of the workpiece, it releases a large amount of heat. Under high temperatures, the workpiece reacts with the surrounding air in an oxidation-reduction reaction, causing the surface to blacken and increasing the risk of weld spatter, which in turn affects the joint strength and sealing of the object. In this embodiment, the gas storage chamber 12 contains a protective gas. During welding, the protective gas in the gas storage chamber 12 is discharged from multiple outlets 13, filling the surface of the workpiece to be welded, thus isolating it from the air and preventing oxidation-reduction reactions during welding.

[0046] In some embodiments, please continue reading Figure 1 and Figure 2 A welding area is formed on the workpiece to be welded; a first channel 11 penetrates the gas storage unit 10, and the first channel 11 has a first outlet end 12 and a first inlet end. The laser enters from the first inlet end and exits from the first outlet end 12. Specifically, the first outlet end 12 of the first channel 11 extends above the welding area, and the orthographic projection of the first outlet end 12 on the workpiece to be welded covers the welding area. This arrangement ensures that the welding area on the workpiece to be welded is completely covered by the gas storage unit 10, the welding area is directly facing the first channel 11, and the protective gas can completely cover the welding area, thereby protecting the welding area and preventing it from being oxidized.

[0047] Furthermore, in some embodiments, to improve reliability, during welding, the gas storage component 10 contacts the surface of the workpiece to be welded. This arrangement confines the area to be welded to a relatively sealed environment, further isolating air and reducing the probability of oxidation-reduction reactions.

[0048] In some embodiments, the gas storage component 10 includes a sidewall and an end plate. The sidewall includes an inner sidewall 121 and an outer sidewall 122. The inner sidewall 121 is disposed near the first channel 11, and the outer sidewall 122 is disposed away from the first channel 11. The end plate includes an upper end plate and a lower end plate. The lower end plate is disposed near the workpiece to be welded, and the upper end plate is disposed away from the workpiece to be welded. The upper end plate and the lower end plate are disposed opposite each other along the axial direction of the first channel 11. The outer sidewall 122 and the inner sidewall 121 are disposed between the upper end plate and the lower end plate. The outer sidewall 122, the inner sidewall 121, the upper end plate, and the lower end plate form a gas storage cavity 12. The positions of the multiple gas outlets 13 are not limited. They can be disposed on the upper end plate, the lower end plate, the inner sidewall 121, the outer sidewall 122, or simultaneously distributed on the upper end plate, the lower end plate, the outer sidewall 122, and the inner sidewall 121. The appropriate option can be selected based on the actual situation.

[0049] In some embodiments, in order to ensure the welding effect, during welding, the gas storage component 10 will be in contact with the surface of the workpiece to be welded, and the first channel 11 and the surface of the workpiece to be welded will form a relatively sealed chamber. Multiple outlets are set on the inner sidewall 121, so that the protective gas can contact the area to be welded at the first time, thereby protecting the area to be welded.

[0050] In some embodiments, the welding auxiliary device 100 further includes a plurality of air blowing components 20, each air blowing component 20 being connected to an air outlet 13. The air blowing component 20 is used to guide the protective gas to the welding area of ​​the workpiece to be welded. Specifically, one end of the air blowing component 20 is connected to the air outlet 13, and the other end of the air blowing component 20 is directed toward the workpiece to be welded.

[0051] The specific type of the air blowing assembly 20 is not limited, as long as it can guide the protective gas from the outlet 13 to the area to be welded on the workpiece. Please refer to [link / reference]. Figure 2 , Figure 3 and Figure 4 In some embodiments, the air blowing assembly 20 includes an air blowing connector 21 and an air guide branch pipe 22. The air guide branch pipe 22 is disposed in the air storage component 10, with one end connected to the air outlet 13 and the other end connected to the air outlet. The air blowing connector 21 is configured to face the workpiece to be welded. Specifically, the protective gas in the air storage chamber 12 enters the corresponding air guide branch pipe 22 from the air outlet 13, and then enters the air outlet connector from the air guide branch pipe 22. The air blowing connector 21 corresponds to the area to be welded of the workpiece. After the protective gas flows out from the air blowing connector 21, it directly fills the vicinity of the area to be welded, isolating the area to be welded from the air in the environment.

[0052] In some embodiments, the area to be welded of the workpiece is far from the air outlet 13, and the protective gas cannot quickly protect the area to be welded. The air guide branch pipe 22 is retractable to adjust the position of the air blowing connector 21. When the area to be welded is far away, the length of the air guide branch pipe 22 is adjusted so that the air blowing connector 21 is directly facing the area to be welded, reducing the probability of oxidation of the workpiece.

[0053] It should be noted that the specific type of the air guide tube 22 is not limited. In some embodiments, the air guide tube 22 is a retractable plastic tube. In other embodiments, the air outlet 13 has an internal thread, and the air guide tube 22 has an external thread. The air guide tube 22 and the air storage component 10 are connected by the external and internal threads. By adjusting the length of the air guide tube 22 through the engagement of the internal and external threads, the position of the air blowing connector 21 can be adjusted.

[0054] Please see Figure 2 , Figure 3 and Figure 4In some embodiments, the workpiece to be welded has a surface to be welded, and multiple weld points are located on the surface to be welded. The multiple weld points are located in different positions. In order to facilitate the protection of multiple weld points, the air blowing connector is rotatably installed on the air guide branch pipe 22. By rotating the air blowing connector 21, it is directed toward different weld points, thereby protecting multiple weld points at the same time. Specifically, the end of the air guide branch pipe 22 away from the air outlet 13 has a snap-fit ​​groove. The air blowing connector 21 includes a rotating part 211 and an air outlet 212 connected together. The rotating part 211 is rotatably installed in the snap-fit ​​groove to adjust the angle of the air outlet 212 so that the air blowing connector 21 is directly facing the area to be welded, reducing the probability of oxidation of the workpiece to be welded.

[0055] In some embodiments, the air nozzle 212 has an air outlet surface, and the angle between the plane where the air outlet surface is located and the plane where the workpiece to be welded is located is α, where 0°≤α<90°. Within the above range, the air nozzle 212 can correspond to more weld points, thereby ensuring that the air blowing connector 21 is directly facing the area to be welded and reducing the probability of the workpiece to be welded being oxidized.

[0056] Furthermore, in some embodiments, 30° ≤ α ≤ 45°. Within this range, it is possible to ensure that the protective gas fills the entire first channel 11, isolating the area to be welded from the air and reducing the probability of oxidation of the workpiece.

[0057] Please see Figure 1 and Figure 5 In some embodiments, the welding auxiliary device 100 further includes a guide 30 for guiding the laser. Specifically, a second channel 31 is formed within the guide 30, which communicates with and corresponds to the first channel 11. The second channel 31 is configured to allow the laser and shielding gas to pass through and be directed towards the workpiece to be welded. In this embodiment, the second channel 31 simultaneously supplies both the laser and the shielding gas. During the welding process, the laser is used to weld the workpiece, and the shielding gas fills the surface of the workpiece, isolating it from air and thus preventing oxidation-reduction reactions during welding.

[0058] It should be noted that the axis of the second channel 31 and the axis of the air outlet 13 form an angle, so that the air outlet directions of the second channel 31 and the air outlet 13 are different. Specifically, taking the axis of the first channel 11 as an example, the axis of the second channel 31 is coaxial with the axis of the first channel 11, and the axes of the multiple air outlets 13 intersect with the axis of the first channel 11 (that is, the axes of the multiple air outlets 13 coincide with the straight line containing the radial direction of the first channel). This arrangement allows protective gas to be released from multiple positions, so that the protective gas completely covers the workpiece to be welded, protecting the workpiece and preventing it from being oxidized.

[0059] The first channel 11 and the gas storage chamber 12 can be vented with protective gas individually or simultaneously. Please refer to [link / reference]. Figure 1 and Figure 5 In some embodiments, the gas storage chamber 12 is connected to the second channel 31 so that the protective gas can flow from the second channel 31 to the gas storage chamber 12. With this configuration, the protective gas can be supplied through a single device.

[0060] In some embodiments, please continue reading Figure 1 The guide 30 includes a body portion 32 and at least one air guide portion 33. The body portion 32 forms a second channel 31, and each air guide portion 33 forms an air guide channel. One end of the air guide channel is connected to the gas storage chamber 12, and the other end of the air guide channel is connected to the second channel 31. Specifically, the protective gas enters the second channel 31, part of the protective gas directly enters the area to be welded from the second channel 31, and part of the protective gas enters the gas storage chamber 12 through the air guide portion 33. The protective gas in the gas storage chamber 12 enters the corresponding air guide branch pipe 22 from the air outlet 13, and then enters the air outlet connector from the air guide branch pipe 22. The air outlet connector 21 corresponds to the area to be welded of the workpiece. After the protective gas flows out from the air outlet connector 21, it directly fills the vicinity of the area to be welded, isolating the area to be welded from the air in the environment.

[0061] In some embodiments, please continue reading Figure 5 Each gas guide section 33 includes a first gas guide pipe 331 and a second gas guide pipe 332 connected together. The first gas guide pipe 331 is connected to the gas storage chamber 12, and the second gas guide pipe 332 is connected to the second channel 31. The first gas guide pipe 331 and the second gas guide pipe 332 form an angle to adjust the position of the main body section 32. It should be noted that the first gas guide pipe 331 and the second gas guide pipe 332 are movably connected. By changing the position of the first gas guide pipe 331 and the second gas guide pipe 332, the position of the main body section 32 can be adjusted so that the main body section 32 can correspond to the area to be welded, allowing the laser to directly irradiate the area to be welded.

[0062] In some embodiments, the air guide 33 includes a plastic tube that is deformable, thereby adjusting the position of the body 32.

[0063] The number of air guide sections 33 is not limited and can be set according to the actual situation. In this embodiment, in order to ensure the stability of the connection, four first air guide sections 33 are provided, and the four air guide sections 33 are arranged at intervals.

[0064] In some embodiments, the distance between two adjacent air outlets 13 is 2mm-4mm; specifically, it can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.7mm, 2.9mm, 3mm, 3.2mm, 3.4mm, 3.5mm, 3.8mm, 4mm or other data not listed.

[0065] In this embodiment, the protective gas includes an inert gas, which includes at least one of helium, neon, and argon.

[0066] This utility model also proposes a welding apparatus, which includes the aforementioned welding auxiliary device 100. The specific structure of the welding auxiliary device is as described in the above embodiments. Since this welding apparatus adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated upon here.

[0067] In some embodiments, the welding apparatus further includes a laser emitter and a shielding gas supply device, wherein the laser emitter is used to emit a laser and the shielding gas supply device is used to supply a shielding gas. A second channel 31 is formed in the gas guide member, the second channel 31 having a second inlet end and a second outlet end, the second outlet end corresponding to the first inlet end of the first channel 11, and the laser emitter and the shielding gas supply device corresponding to the second inlet end.

[0068] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A welding auxiliary device, characterized in that, Including gas storage components; A first channel is formed on the gas storage component, and the first channel is configured to allow the laser to pass through and point to the workpiece to be welded. The gas storage component also has a gas storage cavity surrounding the first channel. The gas storage cavity is configured to contain protective gas. Multiple spaced-out gas outlets are formed on the side wall of the gas storage cavity, and the multiple gas outlets face the workpiece to be welded.

2. The welding auxiliary device according to claim 1, characterized in that, The part to be welded is formed on the part to be welded; The first outlet end of the first channel extends above the area to be welded, and the orthographic projection of the first outlet end on the workpiece to be welded covers the area to be welded.

3. The welding auxiliary device according to claim 2, characterized in that, The sidewall includes an inner sidewall and an outer sidewall. The inner sidewall is located close to the first channel, and a plurality of air outlets are formed on the inner sidewall.

4. The welding auxiliary device according to claim 1, characterized in that, It also includes multiple air blowing components, one end of each air blowing component is connected to the air outlet, and the other end of the air blowing component faces the workpiece to be welded.

5. The welding auxiliary device according to claim 4, characterized in that, The air blowing assembly includes: An air blowing connector is configured to face the workpiece to be welded; and, The air guide tube is connected at one end to the air outlet and at the other end to the air blowing connector. The air guide tube is telescopic to adjust the position of the air blowing connector.

6. The welding auxiliary device according to claim 5, characterized in that, The air outlet has an internal thread, and the air guide branch has an external thread. The air guide branch is connected to the air storage component through the external thread and the internal thread.

7. The welding auxiliary device according to claim 5, characterized in that, The end of the air guide pipe away from the air outlet has a snap-fit ​​groove. The air blowing connector includes a rotating part and an air outlet, the rotating part being rotatably mounted in a snap-fit ​​groove to adjust the angle of the air outlet.

8. The welding auxiliary device according to claim 7, characterized in that, The air outlet has an air outlet surface, and the angle between the plane where the air outlet surface is located and the plane where the workpiece to be welded is located is α, where 0°≤α<90°.

9. The welding auxiliary device according to claim 8, characterized in that, 30°≤α≤45°。 10. The welding auxiliary device according to any one of claims 1-9, characterized in that, It also includes a guide having a second channel formed therein, the second channel being configured to allow the laser and protective gas to pass through and be directed toward the workpiece to be welded.

11. The welding auxiliary device according to claim 10, characterized in that, The axis of the second channel and the axis of the air outlet form an angle, so that the air outlet directions of the second channel and the air outlet are different.

12. The welding auxiliary device according to claim 10, characterized in that, The gas storage chamber is connected to the second channel so that the protective gas can flow from the second channel to the gas storage chamber.

13. The welding auxiliary device according to claim 12, characterized in that, The guide includes: The main body portion has the second channel formed therein; and, At least one air guide section is provided, forming an air guide channel. One end of the air guide channel is connected to the air storage chamber, and the other end of the air guide channel is connected to the second channel.

14. The welding auxiliary device according to claim 13, characterized in that, Each of the air guides includes a first air guide pipe and a second air guide pipe connected together. The first air guide pipe is connected to the air storage chamber, and the second air guide pipe is connected to the second channel. An angle is formed between the first air guide pipe and the second air guide pipe to allow adjustment of the position of the main body.

15. A welding apparatus, characterized in that, Includes the welding auxiliary device as described in any one of claims 1-14.

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