A welding tip mechanism and welding system

Abstract

The utility model relates to a kind of welding nozzle mechanism and welding system, welding nozzle mechanism includes welding nozzle body, and welding nozzle body is along second direction and is set through welding cavity;Welding nozzle body is also set with first flow channel and third flow channel respectively and is communicated with welding cavity, and first flow channel and third flow channel are oppositely arranged in the two sides of welding cavity, and first flow channel flows into protective gas to welding cavity, and protective gas flows out from third flow channel.In welding, first flow channel continuously passes into protective gas in welding cavity and discharges from third flow channel, and protective gas brings out the impurities such as welding fume in welding cavity from third flow channel when flowing, to reduce the gas impurities of welding area, and the welding nozzle mechanism simultaneously realizes two functions of dust extraction and filling protective gas, and the required occupied volume is smaller.

Description

Technical Field

[0001] This utility model relates to the technical field of welding, and in particular to a welding nozzle mechanism and welding system. Background Technology

[0002] Welding nozzle mechanisms are widely used in various welding processes, especially in high-precision and long-term continuous operation scenarios. In order to avoid the welding quality being affected by impurities such as fumes generated during welding, traditional welding nozzle mechanisms need to be equipped with both dust extraction mechanisms and protective gas mechanisms. Furthermore, the dust extraction mechanism and the protective gas mechanism are provided with independent passages in the welding nozzle mechanism, which requires a large volume. When assembling high-voltage controllers in automobiles, the above-mentioned welding nozzle mechanisms cannot be used because the welding space of the controller is small. Utility Model Content

[0003] To address the technical problem of limited welding positions and small welding space during the welding of automotive controllers, which makes existing welding nozzle mechanisms unsuitable, this utility model provides a welding nozzle mechanism and welding system.

[0004] To achieve the above objectives, this utility model provides a welding nozzle structure, including a welding nozzle body, wherein a through welding cavity is formed in the welding nozzle body along a second direction; the welding nozzle body is also provided with a first flow channel and a third flow channel respectively communicating with the welding cavity, the first flow channel and the third flow channel are arranged opposite to each other on both sides of the welding cavity, the first flow channel flows into the welding cavity with protective gas, and the protective gas flows out from the third flow channel.

[0005] Furthermore, the first flow channel includes a flow channel outlet communicating with the welding cavity and a flow channel inlet away from the welding cavity, wherein the distance between the flow channel inlet and the bottom surface of the welding nozzle body is greater than the distance between the flow channel outlet and the bottom surface of the welding nozzle body.

[0006] Furthermore, an exhaust notch is provided at one end of the third flow channel that communicates with the welding cavity, and the flow channel outlet and the exhaust notch are arranged opposite to each other along the first direction.

[0007] Furthermore, the welding nozzle mechanism is provided with a vent, which is used to connect the welding cavity with the outside of the welding nozzle body.

[0008] Furthermore, the first flow channel includes a flow channel outlet communicating with the welding cavity, and the distance between the vent and the bottom surface of the welding nozzle body is less than the distance between the flow channel outlet and the bottom surface of the welding nozzle body.

[0009] Furthermore, an exhaust notch is provided at one end of the third flow channel that communicates with the welding cavity. The area of ​​the exhaust notch is larger than the area of ​​the vent and larger than the area of ​​the flow channel outlet.

[0010] Furthermore, the welding nozzle mechanism also includes a clamping structure, which is connected to the welding nozzle body and drives the welding nozzle body to move along the second direction.

[0011] Furthermore, the clamping structure includes a welding nozzle mounting bracket and a clamping part. The clamping part is connected to the welding nozzle mounting bracket and drives the welding nozzle mounting bracket to move along the second direction. The welding nozzle mounting bracket is connected to the top surface of the welding nozzle body.

[0012] Furthermore, the welding nozzle mounting bracket includes an elastic part and an adjustable connecting part. One end of the adjustable connecting part is connected to the clamping part, and the other end is connected to the welding nozzle body through the elastic part. The adjustable connecting part is used to adjust the welding nozzle body along a second direction.

[0013] Another objective of this embodiment is to provide a welding system having the above-mentioned welding nozzle mechanism and including a positioning mechanism for positioning the welding nozzle mechanism.

[0014] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0015] Compared with the prior art, the welding nozzle body of this utility model has a welding cavity in the middle, and a first flow channel and a third flow channel connected on opposite sides of the welding cavity. Shielding gas is introduced into the first flow channel and flows out from the opposite third flow channel. When welding in the welding cavity, shielding gas is continuously introduced into the welding cavity through the first flow channel. The shielding gas carries away welding fumes and other impurities in the welding cavity from the third flow channel, thereby reducing gas impurities in the welding area. It achieves both dust extraction and shielding gas filling functions, requires less space, has a wider range of applications, and ensures the strength and reliability of the welded joint. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of the welding nozzle body of this utility model;

[0018] Figure 2 This is a cross-sectional view of the welding nozzle body of this utility model;

[0019] Figure 3 This is a schematic diagram of the welding device of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the welding nozzle body and the welding nozzle mounting bracket of this utility model;

[0021] Figure 5 This is a cross-sectional view of the welding nozzle mechanism of this utility model.

[0022] Explanation of reference numerals in the accompanying drawings: Welding nozzle body - 1; Welding cavity - 11; First flow channel - 12; Flow channel outlet - 121; Flow channel inlet - 122; Vent - 13; Third flow channel - 14; Exhaust notch - 141; Extension - 15; Manifold - 2; Clamping structure - 3; Welding nozzle mounting bracket - 31; Elastic part - 311; Connecting part - 312; Clamping part - 32; Bottom surface of welding nozzle body - A; Mounting part - 4; Positioning mechanism - 5; Positioning part - 51; Worktable - 52. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, deviating from the general scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0027] Furthermore, in the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this utility model should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] Example 1

[0030] The present invention provides a welding nozzle mechanism, referring to... Figures 1-2 The welding nozzle mechanism includes a welding nozzle body 1, which has a welding cavity 11 extending through it along a second direction. In an embodiment, the welding cavity 11 extends to the bottom surface A of the welding nozzle body 1. During welding, the second direction is the height direction of the welding nozzle body 1. Taking a welding controller busbar as an example, the busbar 2 is located below the welding nozzle body 1. The bottom surface A of the welding nozzle body 1 abuts against the welding surface of the busbar 2 to be welded. The welding cavity 11 extends to the welding surface of the busbar 2 to be welded, so that the welding of the busbar 2 can be achieved in the welding cavity 11.

[0031] In this embodiment, a laser device is used for welding the busbar 2. Preferably, the welding nozzle body 1 is made of copper, which has good thermal conductivity, effectively conducting laser heat. Copper also has low hardness, preventing scratches on the busbar 2. A welding port communicating with the welding cavity 11 is provided on the welding nozzle body 1. The welding port is located on the top surface of the welding nozzle body 1. The welding device enters the welding cavity 11 from the top surface of the welding nozzle body 1 to realize the welding process of the busbar 2.

[0032] A first flow channel 12 and a third flow channel 14 are also formed on the welding nozzle body 1, and both the first flow channel 12 and the third flow channel 14 are connected to the welding cavity 11. In this embodiment, the welding process of the manifold 2 is carried out in the welding cavity 11. During the welding process, fumes and other impurities are generated, which affect the welding quality. Therefore, it is necessary to remove the fumes and impurities in a timely manner. The first flow channel 12 and the third flow channel 14 are arranged on opposite sides of the welding cavity 11. The first flow channel 12 introduces protective gas into the welding cavity 11, and the protective gas flows out from the third flow channel 14. It should be noted that the protective gas is blown into the third flow channel 14 from the first flow channel 12. Since the first flow channel 12 and the third flow channel 14 are arranged on both sides of the welding cavity 11, when the protective gas flows from the first flow channel 12 into the third flow channel 14, it needs to pass through the welding cavity 11 to remove the fumes and impurities in the welding cavity 11.

[0033] As a preferred embodiment, the shielding gas enters the first flow channel 12 at a predetermined flow rate. The shielding gas carries away impurities such as fumes generated during welding within the welding cavity 11 and exits through the third flow channel 14. The shielding gas continuously flows out from the first flow channel 12, thus surrounding the welding position. It should be noted that the shielding gas flows at the predetermined flow rate, thereby driving the flow of fumes and other impurities within the welding cavity 11. The first and third flow channels 12 and 14 are located on opposite sides of the welding cavity 11, forming a flow path. This welding nozzle mechanism delivers shielding gas from the first flow channel 12 to the third flow channel 14, expels welding fumes from the welding cavity 11, and allows shielding gas to enter the welding cavity 11, simultaneously achieving both dust extraction and protection functions. The flow channel structure is simple, requiring a smaller structure, making it suitable for application in laser welding scenarios for automotive controllers.

[0034] In this embodiment, the protective gas is a welding protective gas, which can be a single gas or a mixture of gases, and usually includes gases with high stability, high purity and low reactivity with metals, such as argon and helium. It is mainly used to prevent oxidation and reduce porosity, thereby improving welding quality.

[0035] In one embodiment, refer to Figure 2 The first flow channel 12 includes a flow channel outlet 121 communicating with the welding cavity 11 and a flow channel inlet 122 away from the welding cavity 11. The distance between the flow channel inlet 122 and the bottom surface A of the welding nozzle body 1 is greater than the distance between the flow channel outlet 121 and the bottom surface A of the welding nozzle body 1.

[0036] Specifically, the distance between the flow channel inlet 122 and the bottom surface A of the welding nozzle body 1 is greater than the distance between the flow channel outlet 121 and the bottom surface A of the welding nozzle body 1, so the first flow channel 12 is inclined. In the embodiment, the flow channel inlet 122 is away from the welding cavity 11 and connected to an external gas pipe connector (not shown in the figure), and external protective gas is connected through the gas pipe connector. It should be noted that the flow channel inlet 122 is connected to the protective gas, and the flow channel outlet 121 is connected to the welding cavity 11 to discharge the protective gas. Since the first flow channel 12 is inclined, when the protective gas flows out from the first flow channel 12, it ensures that the protective gas flows to the welding surface of the manifold 2, which facilitates the discharge of impurities.

[0037] In one embodiment, refer to Figure 1 and Figure 2 The first flow channel 12 is connected to the welding cavity 11 at one end, which is the flow channel inlet 122. The third flow channel 14 is connected to the welding cavity 11 at one end, which is provided with an exhaust notch 141. The flow channel inlet 122 and the exhaust notch 141 are arranged opposite to each other along the first direction.

[0038] Specifically, the end of the first flow channel 12 that communicates with the welding cavity 11 is configured as the flow channel outlet 121. In this embodiment, the flow channel outlet 121 is located on the inner wall of the welding nozzle body 1, and the protective gas flows into the welding cavity 11 from the flow channel outlet 121. The end of the third flow channel 14 that communicates with the welding cavity 11 is configured as the exhaust port 141, and the protective gas containing welding fumes and impurities is discharged from the welding cavity 11 through the exhaust port 141. In this embodiment, the first direction can be the length direction of the welding nozzle body 1. The first direction is perpendicular to the second direction. The flow channel outlet 121 and the exhaust port 141 are opposite to each other along the first direction, that is, the flow channel outlet 121 and the exhaust port 141 are opposite to each other on both sides of the welding cavity 11 along the first direction. The protective gas containing impurities and fumes can flow from the flow channel outlet 121 to the exhaust port 141 along the first direction. Therefore, the protective gas containing impurities and fumes flows in a straight line, which facilitates the timely discharge of fumes.

[0039] In one embodiment, a vent 13 is also provided on the welding nozzle body 1, which is used to connect the welding cavity 11 with the outside of the welding nozzle body 1.

[0040] Specifically, a vent 13 is provided on the welding nozzle mechanism to connect with external gas. The vent 13 is also connected to the welding cavity 11. When the protective gas and dust impurities flow in the welding cavity 11, they come into contact with the inner wall of the welding nozzle body 1, creating resistance to the gas flow and causing negative pressure. This affects the discharge of the protective gas and dust impurities from the third flow channel 14. Therefore, a vent 13 is provided on the welding nozzle body 1 to connect the welding cavity 11 and the outside of the welding nozzle body 1. When negative pressure is formed in the welding cavity 11, external gas is supplied to the welding cavity 11 through the vent 13 to prevent negative pressure from forming in the welding cavity 11, thereby ensuring the discharge process of welding dust and other gaseous impurities.

[0041] In one embodiment, the first flow channel 12 includes a flow channel outlet 121 communicating with the welding cavity 11, and the distance between the vent 13 and the bottom surface A of the welding nozzle body 1 is less than the distance between the flow channel outlet 121 and the bottom surface A of the welding nozzle body 1.

[0042] Specifically, since the welding surface is located on the bottom surface of the welding nozzle body 1, and the protective gas flows towards the bottom surface of the welding nozzle body 1 in the first flow channel 12, it is easier to form a negative pressure on the bottom surface of the welding nozzle body 1. The distance between the vent 13 and the bottom surface A of the welding nozzle body 1 is smaller than the distance between the flow channel outlet 121 and the bottom surface A of the welding nozzle body 1. Therefore, the vent 13 is positioned closer to the bottom surface of the welding nozzle body 1 than the flow channel outlet 121, further avoiding the negative pressure problem and ensuring the smooth flow of the protective gas in the first flow channel 12 and the third flow channel 14.

[0043] In one embodiment, refer to Figure 1 and Figure 2 The third flow channel 14 is connected to the welding cavity 11 at one end, and an exhaust notch 141 is provided. The area of ​​the exhaust notch 141 is larger than the area of ​​the vent 13 and larger than the area of ​​the flow channel outlet 121.

[0044] Specifically, the area of ​​the exhaust gap 141 is larger than the area of ​​the vent 13 and the area of ​​the flow channel outlet 121. The larger the area of ​​the exhaust gap 141, the larger the area of ​​the protective gas discharge. Furthermore, the larger the area of ​​the exhaust gap 141 is than the area of ​​the vent 13 and the area of ​​the flow channel outlet 121, the easier it is for the protective gas containing welding fumes and impurities to be discharged from the exhaust gap 141.

[0045] As a preferred embodiment, both the vent 13 and the third flow channel 14 are open structures. Both the vent 13 and the third flow channel 14 are connected to the bottom surface A of the welding nozzle body 1, which facilitates the discharge of gas containing welding fumes and impurities from the third flow channel 14, ensuring welding quality. Furthermore, the upper part of the third flow channel 14 is also connected to an arched extension port, which is an open structure that opens into the third flow channel 14. The arched extension port is connected to the welding cavity 11 for discharging protective gas, expanding the discharge channel of the protective gas and facilitating its discharge.

[0046] In this embodiment, the working principle of the welding nozzle mechanism is as follows: a welding cavity 11 for welding is provided in the middle of the welding nozzle body 1. A first flow channel 12, a vent 13, and a third flow channel 14 are opened on the side wall. A protective gas with a predetermined flow rate is introduced into the first flow channel 12. Since the distance between the inlet 122 of the first flow channel 12 and the bottom surface A of the welding nozzle body 1 is greater than the distance between the outlet 121 of the flow channel and the bottom surface A of the welding nozzle body 1, the protective gas flows towards the bottom surface A of the welding nozzle body 1 in the first flow channel 12. The protective gas will weld... The fumes and impurities generated during surface welding flow out from the third flow channel 14, achieving the effect of removing fumes and impurities. Furthermore, a vent 13 connected to external gas is provided at the lower part of the flow channel outlet 121 to avoid the problem of negative pressure in the welding cavity 11, further ensuring that the protective gas is blown in from the first flow channel 12 and carries the fumes and impurities out from the third flow channel 14. By opening three simple flow channels on the welding nozzle mechanism, the effects of dust extraction and welding protection are achieved simultaneously. While ensuring the welding effect, the welding nozzle mechanism has a simple structure and requires a small volume.

[0047] In one embodiment, refer to Figure 3 and Figure 5 The welding nozzle mechanism also includes a clamping structure 3, which is connected to the welding nozzle body 1 and drives the welding nozzle mechanism to move along the second direction. A busbar 2 is provided below the welding nozzle mechanism along the second direction. The busbar 2 is set on the welding mounting platform and is located directly below the welding nozzle mechanism. The clamping structure 3 is connected to the welding nozzle mechanism. Since the busbar 2 is located directly below the welding nozzle mechanism, the clamping structure 3 drives the welding nozzle mechanism to rise and fall, so that the bottom surface A of the welding nozzle body 1 in the welding nozzle mechanism can abut against the welding surface of the top surface of the busbar 2, which facilitates welding work.

[0048] In one embodiment, refer to Figure 3 The clamping structure 3 includes a welding nozzle mounting bracket 31 and a clamping part 32. The clamping part 32 is connected to the welding nozzle mounting bracket 31. The clamping part 32 drives the welding nozzle mounting bracket 31 to move along the second direction. The welding nozzle mounting bracket 31 is connected to the top surface of the welding nozzle body 1.

[0049] Specifically, the welding nozzle mounting bracket 31 is used to connect the welding nozzle body 1, and the clamping part 32 is connected to the welding nozzle mounting bracket 31 to drive the welding nozzle mounting bracket 31 to move up and down in the second direction; as a preferred embodiment, the clamping part 32 can be configured as a flat plate structure for connecting the cylinder assembly, and multiple welding nozzle mounting brackets 31 can be connected on the flat plate structure.

[0050] As a preferred embodiment, the welding nozzle mounting bracket 31 includes a welding nozzle connector, and the clamping part 32 includes a clamping part 32 connector. Two welding nozzle mounting brackets 31 can be connected to the top surface of a welding nozzle body 1. To facilitate the setting of the welding nozzle mounting brackets 31, extensions 15 are respectively provided on both sides of the top surface of the welding nozzle body 1. The extensions 15 extend away from the welding nozzle body 1, and the welding nozzle mounting brackets 31 can be connected to the extensions 15. The clamping part 32 connector can connect multiple welding nozzle mounting brackets 31 on the same welding nozzle body 1, or can connect multiple welding nozzle mounting brackets 31 on multiple welding nozzle bodies 1 at the same time, which facilitates the stability of the lifting and lowering of the welding nozzle body 1, and can also drive the lifting and lowering of multiple welding nozzle bodies 1 at the same time, thereby improving welding efficiency.

[0051] In one embodiment, refer to Figure 4 The welding nozzle mounting bracket 31 includes an elastic part 311 and an adjustable connecting part 312. One end of the adjustable connecting part 312 is connected to the clamping part 32, and the other end is connected to the welding nozzle body 1 through the elastic part 311. The adjustable connecting part 312 is used to adjust the welding nozzle body 1 to translate along the second direction.

[0052] Specifically, the upper part of the connecting part 312 is configured as a connecting rod, and the lower part is configured as a connecting sleeve. One end of the connecting part 312 is connected to the clamping part 32. A set of connecting bolts can be provided on the connecting rod. The outer wall of the connecting rod is provided with threads, and the inner wall of the connecting bolt is provided with matching threads. The connecting bolt moves up and down on the connecting rod, which can further adjust the lifting and lowering of the welding nozzle body 1. The connecting bolt is connected to the clamping part 32. After the clamping part 32 drives the connecting part 312 to move up and down, the connecting bolt can further adjust the lifting and lowering of the welding nozzle body 1, thereby adjusting the clamping force of the welding nozzle body 1 on the manifold 2.

[0053] An elastic part 311 is provided at the other end of the connecting part 312. The elastic part 311 is located in the connecting sleeve, and there is a gap between the connecting part 312 and the welding nozzle body 1. When the pressing part 32 drives the welding nozzle mounting bracket 31 to move downward until the bottom surface of the welding nozzle body 1 abuts against the welding surface of the manifold 2, the manifold 2 generates a reaction force on the welding nozzle body 1, which acts on the elastic part 311. The elastic part 311 provides a certain buffer space for the pressure of the pressing part 32 and the reaction force of the manifold 2, ensuring that the manifold 2 fits tightly during welding, avoiding thermal deformation of various parts of the device during welding or cumulative errors in the assembly process that cause a certain gap between the manifold 2 and the welding nozzle body 1, affecting the accuracy and stability of the welding structure.

[0054] Example 2

[0055] Unlike the above embodiments, this embodiment provides a welding system equipped with the aforementioned welding nozzle mechanism. The welding nozzle mechanism in this embodiment is exactly the same as the welding nozzle mechanism described above, and will not be described in detail in this embodiment.

[0056] Reference Figure 3 The welding system also includes a positioning mechanism 5, which is used to fix the welding nozzle mechanism.

[0057] Specifically, the welding nozzle mechanism also includes a mounting part 4, which is located at the bottom of the welding nozzle body 1 and is used to install and support the welding nozzle body 1. The positioning mechanism 5 includes a positioning part 51 and a worktable 52. The positioning part 51 is located on the worktable 52, and there are two positioning parts 51. The two positioning parts 51 form a positioning channel. The mounting part 4 is fixed in the positioning channel and abuts against the positioning part 51. The positioning part 51 can limit the mounting part 4. The welding nozzle mechanism is located between the positioning parts 51, and multiple positioning grooves (not shown in the figure) are also opened on the worktable 52. After the welding nozzle mechanism moves to a predetermined position between the positioning parts 51, the mounting part 4 is fixed on the worktable 52 by inserting bolts or other fasteners into the positioning grooves, thereby realizing the positioning of the welding nozzle mechanism. The welding system of this embodiment is equipped with the above-mentioned welding nozzle mechanism. The welding nozzle body is small in size to facilitate welding and can ensure that the welding nozzle mechanism is pressed tightly against the welding surface to ensure the quality of welding.

[0058] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A welding tip mechanism characterized by, It includes a welding nozzle body (1), wherein the welding nozzle body (1) has a through welding cavity (11) along a second direction; The welding nozzle body (1) is also provided with a first flow channel (12) and a third flow channel (14) that are respectively connected to the welding cavity (11). The first flow channel (12) and the third flow channel (14) are arranged opposite to each other on both sides of the welding cavity (11). The first flow channel (12) flows into the welding cavity (11) with protective gas, and the protective gas flows out from the third flow channel (14).

2. The welding nozzle mechanism according to claim 1, characterized in that, The first flow channel (12) includes a flow channel outlet (121) communicating with the welding cavity (11) and a flow channel inlet (122) away from the welding cavity (11). The distance between the flow channel inlet (122) and the bottom surface (A) of the welding nozzle body (1) is greater than the distance between the flow channel outlet (121) and the bottom surface (A) of the welding nozzle body (1).

3. The welding nozzle mechanism according to claim 2, characterized in that, The third flow channel (14) is provided with an exhaust notch (141) at one end that is connected to the welding cavity (11), and the flow channel outlet (121) and the exhaust notch (141) are arranged opposite to each other along the first direction.

4. The welding nozzle mechanism according to claim 1, characterized in that, The welding nozzle body (1) is also provided with a vent (13), which is used to connect the welding cavity (11) with the outside of the welding nozzle body (1).

5. The welding nozzle mechanism according to claim 4, characterized in that, The first flow channel (12) includes a flow channel outlet (121) communicating with the welding cavity (11), and the distance between the vent (13) and the bottom surface (A) of the welding nozzle body (1) is less than the distance between the flow channel outlet (121) and the bottom surface (A) of the welding nozzle body (1).

6. The welding nozzle mechanism according to claim 5, characterized in that, The third flow channel (14) is provided with an exhaust notch (141) at one end that is connected to the welding cavity (11). The area of ​​the exhaust notch (141) is larger than the area of ​​the vent (13) and larger than the area of ​​the flow channel outlet (121).

7. The welding nozzle mechanism according to claim 1, characterized in that, It also includes a clamping structure (3), which is connected to the welding nozzle body (1) and drives the welding nozzle body (1) to move along the second direction.

8. The welding nozzle mechanism according to claim 7, characterized in that, The clamping structure (3) includes a weld nozzle mounting bracket (31) and a clamping part (32) connected together. The clamping part (32) drives the weld nozzle mounting bracket (31) to move along the second direction. The weld nozzle mounting bracket (31) is connected to the top surface of the weld nozzle body (1).

9. The welding nozzle mechanism according to claim 8, characterized in that, The welding nozzle mounting bracket (31) includes an elastic part (311) and an adjustable connecting part (312). One end of the adjustable connecting part (312) is connected to the clamping part (32), and the other end is connected to the welding nozzle body (1) through the elastic part (311). The adjustable connecting part (312) is used to adjust the welding nozzle body (1) to translate along the second direction.

10. A welding system, characterized in that, It includes a welding nozzle mechanism and a positioning mechanism (5) as described in any one of claims 1-9, wherein the positioning mechanism (5) is used to position the welding nozzle mechanism.

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