Welding nozzle connecting assembly, welding head and welding equipment

Abstract

The utility model discloses a welding nozzle connecting assembly, a welding head and welding equipment. The welding nozzle connecting assembly comprises a welding nozzle connecting piece, the welding nozzle connecting piece is internally provided with a cavity, the first end of the welding nozzle connecting piece is provided with an air outlet communicated with the cavity, the welding nozzle connecting piece is provided with an air inlet, and the air outlet of the welding nozzle connecting piece is used for being communicated with a welding nozzle; the flow equalizing mechanism is arranged in the cavity, a groove is formed in the side, facing the first side wall of the cavity, of the flow equalizing mechanism, the air inlet hole penetrates through the first side wall, and the projection of the air inlet hole in the flow equalizing mechanism is located in the groove in the depth direction of the air inlet hole. The flow equalizing mechanism is arranged to be of the net-shaped structure, the mesh area of the net-shaped structure is smaller than the area of the air inlet hole, when shielding gas is introduced into the air inlet hole, the gas in the first channel can keep certain positive pressure, the gas can evenly pass through the net-shaped structure, the probability of turbulent flow is reduced, and therefore the welding quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of welding, and in particular to a welding nozzle connection assembly, a welding head and welding equipment. Background Art

[0002] For welding heads that require shielding gas, there is a shielding gas channel inside. During the welding process, the uneven distribution of shielding gas in the shielding gas channel will cause turbulence, which is easy to produce local negative pressure and affect the welding quality. Especially during the welding process of laser welding heads, the turbulence of shielding gas not only affects the welding quality, but also the smoke and dust generated by welding can easily enter the shielding gas channel, causing the shielding lens of the welding head to be contaminated and shortening the life of the shielding lens. Utility Model Content

[0003] In view of the above problems, the present application provides a welding nozzle connection assembly, a welding head and a welding device, which can improve the uneven distribution of gas in the shielding gas channel.

[0004] In a first aspect, the present application provides a welding nozzle connection assembly comprising:

[0005] A welding nozzle connector, wherein the welding nozzle connector has a cavity inside, a first end of the welding nozzle connector is provided with an air outlet connected to the cavity, the welding nozzle connector is provided with an air inlet, and the air outlet of the welding nozzle connector is used to communicate with the welding nozzle;

[0006] A flow balancing mechanism is arranged in the cavity. A groove is provided on one side of the flow balancing mechanism facing the first side wall of the cavity. The air inlet hole passes through the first side wall. Along the depth direction of the air inlet hole, the projection of the air inlet hole on the flow balancing mechanism is located in the groove. The groove and the first side wall jointly define a first channel. The first channel extends along the circumferential direction of the cavity. The first channel includes a second side wall. The second side wall is opposite to the first side wall and is spaced apart. At least part of the wall body of the second side wall is a mesh structure. The mesh area of ​​the mesh structure is smaller than the area of ​​the air inlet hole.

[0007] The flow balancing mechanism is set as a mesh structure, and the mesh area of ​​the mesh structure is smaller than the area of ​​the air inlet. When the protective gas is introduced into the air inlet, the gas in the first channel can maintain a certain positive pressure, so that the gas can pass through the mesh structure evenly to reduce the probability of turbulence, thereby improving the welding quality.

[0008] In some embodiments, the mesh area is 5%-10% smaller than the area of ​​the air inlet hole.

[0009] A mesh area that is too small affects the flow of the shielding gas into the cavity and the welding quality. Under the premise of a certain shielding gas pressure, in order to take into account the flow of the shielding gas and reduce the probability of turbulence in the welding nozzle connector, the mesh area is set to be 5%-10% smaller than the area of ​​the air inlet.

[0010] In some embodiments, the current balancing mechanism includes:

[0011] A ventilating tube, the ventilating tube forms a second side wall;

[0012] A first sealing ring connected to one end of the air-permeable cylinder, the first sealing ring is arranged around the air-permeable cylinder, and the first sealing ring is in sealing cooperation with the first side wall;

[0013] The second sealing ring is connected to the other end of the air-permeable cylinder, is arranged around the air-permeable cylinder, and is sealed and matched with the first side wall.

[0014] The first sealing ring and the second sealing ring are both sealed with the first side wall, which can reduce the probability of gas passing through between the first sealing ring and the second sealing ring and the first side wall respectively, so as to reduce the probability of local turbulence. After the shielding gas enters the first channel, it can pass through the mesh structure of the second side wall more evenly, so as to improve the welding quality.

[0015] In some embodiments, the first sealing ring is interference fit with the first side wall; and / or the second sealing ring is interference fit with the first side wall.

[0016] Thus, on the one hand, the disassembly and assembly of the first sealing ring and / or the second sealing ring can be facilitated, and at the same time, the probability of gas passing through between the first sealing ring and the first side wall and / or between the second sealing ring and the first side wall can be reduced.

[0017] In some embodiments, the current balancing mechanism further includes:

[0018] The baffle is located in the first channel, is arranged opposite to the air inlet, is connected to the air permeable tube, at least one of the first sealing ring and the second sealing ring, and along the depth direction of the air inlet, the projection of the air inlet on the baffle is within the edges around the baffle.

[0019] When the gas enters from the air inlet, the part of the mesh structure opposite to the air inlet is directly opposite to the air inlet and close to the air inlet, which may make the local pressure of the gas in this part of the mesh structure greater than the pressure at other positions of the mesh structure, resulting in uneven pressure distribution and easy to generate turbulence. By setting the baffle, the gas is not directly blown to the part of the mesh structure opposite to the air inlet, thereby reducing the probability of turbulence caused by excessive local pressure, allowing the gas to pass through the mesh structure more evenly and be ejected from the welding nozzle, thereby improving the welding quality.

[0020] In some embodiments, the baffle is disposed against the mesh structure.

[0021] Thus, the shielding gas can be prevented from entering the portion of the grid opposite to the air inlet hole, so that the shielding gas can flow evenly along the circumference of the grid to reduce the probability of turbulence caused by excessive local pressure.

[0022] In some embodiments, the baffle has a first blocking end and a second blocking end along the circumferential direction of the cavity, the plane passing through the first blocking end and the axis of the breathable tube is the first plane, the plane passing through the second blocking end and the axis of the breathable tube is the second plane, the angle between the first plane and the second plane is a, and the value range of a is 30°-60°.

[0023] When a=30°, the baffle can basically block the part of the mesh structure opposite to the air inlet, so as to reduce the probability of excessive pressure in the part of the mesh structure opposite to the air inlet. As the angle of a increases, the blocking area can be increased. However, the increase in the blocking area of ​​the mesh structure will reduce the flow rate of the shielding gas. In order to take into account the flow rate of the shielding gas, a is set between 30°-60°.

[0024] In some embodiments, the value range of a is 45°-50°.

[0025] The value range of a is set between 45° and 50°, which can further reduce the probability of excessive pressure in the part of the mesh structure opposite to the air inlet and the nearby position, and can better take into account the flow rate of the shielding gas to meet the needs of welding.

[0026] In some embodiments, the cavity includes a first cavity and a second cavity that are connected to each other, the air outlet is connected to the first cavity, there is a step surface between the first cavity and the second cavity, the flow equalizing mechanism is arranged in the second cavity, the flow equalizing mechanism is against the step surface, and the second cavity has a first side wall.

[0027] Thus, the step surface can position the flow balancing mechanism to improve the installation accuracy of the relative position of the air inlet and the mesh structure, so that the gas entering and exiting the air inlet can pass through the mesh structure, while facilitating the installation of the flow balancing mechanism.

[0028] In a second aspect, the present application provides a welding head, comprising:

[0029] Welding nozzle;

[0030] The welding nozzle connecting assembly of the first aspect, the air outlet is communicated with the welding nozzle;

[0031] The protective lens assembly is located at a side of the welding nozzle connection assembly away from the welding head and is connected to the welding nozzle connection assembly.

[0032] Since the welding head includes all the technical features of the above-mentioned welding nozzle connection assembly, the effects are the same as those described above and will not be repeated here.

[0033] In a third aspect, the present application provides a welding device, comprising the welding head of the second aspect.

[0034] Since the welding equipment includes all the technical features of the above-mentioned welding head, the effects are the same as those described above and will not be repeated here.

[0035] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 An exploded view of a welding nozzle connection assembly according to an embodiment of the present application;

[0038] Figure 2 It is an axonometric view of a welding nozzle connecting member in a welding nozzle connecting assembly according to an embodiment of the present application;

[0039] Figure 3 It is an axonometric view of a welding nozzle connection assembly according to an embodiment of the present application;

[0040] Figure 4 This is an axonometric diagram of a current balancing mechanism in a welding nozzle connection assembly according to an embodiment of the present application;

[0041] Figure 5 This is an axonometric view of a venting tube of a flow balancing mechanism in a welding nozzle connection assembly according to an embodiment of the present application;

[0042] Figure 6 A top view of the connection between the air cylinder and the baffle in a flow equalizing mechanism according to an embodiment of the present application;

[0043] Figure 7 This is a partial isometric view of a welding head according to an embodiment of the present application.

[0044] The reference numerals in the specific implementation manner are as follows:

[0045] 100. Welding head;

[0046] 110, welding nozzle connection assembly; 120, welding nozzle; 130, protective lens assembly; 131, protective lens; 132, adapter;

[0047] 10. Welding nozzle connector; 11. Cavity; 111. First cavity; 112. Second cavity; 12. Step surface; 13. Air inlet; 20. Flow equalizing mechanism; 21. Air tube; 211. Mesh structure; 22. First sealing ring; 23. Second sealing ring; 24. Baffle; 25. Groove. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] The welding nozzle connector of the welding head has a shielding gas channel inside. During the welding process, the shielding gas is unevenly distributed in the shielding gas channel, which will cause turbulence. The welding nozzle connector has an air inlet. When the shielding gas is introduced into the air inlet, the gas flows directly into the shielding gas channel of the welding nozzle connector through the annular cavity, which is easy to produce local negative pressure and affect the welding quality. Especially during the welding process of the laser welding head, the shielding gas turbulence will not only affect the welding quality, but the smoke and dust generated by the welding will also easily enter the shielding gas channel and move away from the welding nozzle to the upstream of the welding nozzle connector, causing the welding head's protective lens to be contaminated and shortening the life of the protective lens.

[0057] In view of this, the present application provides a welding nozzle connection assembly, in which the flow equalizing mechanism is set as a mesh structure, and the mesh area of ​​the mesh structure is smaller than the area of ​​the air inlet. When the protective gas is introduced into the air inlet, the gas in the first channel can maintain a certain positive pressure, so that the gas can pass through the mesh structure evenly to reduce the probability of turbulence, thereby improving the welding quality.

[0058] The welding nozzle connection assembly of the present application can be used in welding heads that require welding wire and shielding gas, and can also be used in laser welding heads.

[0059] For the convenience of explanation, please refer to the following examples. Figure 1-Figure 7 , a welding nozzle connection assembly 110 of some embodiments of the present application is taken as an example for description.

[0060] The welding nozzle connection assembly 110 includes a welding nozzle connection member 10 and a flow equalization mechanism 20. The welding nozzle connection member 10 has a cavity 11 inside, and a first end of the welding nozzle connection member 10 is provided with an air outlet connected to the cavity 11, and the welding nozzle connection member 10 is also provided with an air inlet 13, and the air outlet of the welding nozzle connection member 10 is used to communicate with the welding nozzle 120. The flow equalization mechanism 20 is arranged in the cavity 11, and a groove 25 is provided on the side of the first side wall of the flow equalization mechanism 20 facing the cavity 11, and the air inlet 13 passes through the first side wall, and along the depth direction of the air inlet 13, the projection of the air inlet 13 on the flow equalization mechanism 20 is located in the groove 25, and the groove 25 and the first side wall jointly define a first channel, and the first channel extends along the circumferential direction of the cavity 11, and the first channel includes a second side wall, and the second side wall is opposite to the first side wall and is arranged at intervals, and at least part of the wall body of the second side wall is a mesh structure 211, and the mesh area of ​​the mesh structure 211 is smaller than the area of ​​the air inlet 13.

[0061] The number of the air inlet hole 13 may be one or more.

[0062] When there are multiple air inlet holes 13 , the mesh area of ​​the mesh structure 211 is smaller than the area of ​​the air inlet holes 13 , which means that the mesh area of ​​the mesh structure 211 is smaller than the sum of the areas of the multiple air inlet holes 13 .

[0063] The mesh structure 211 can be formed by weaving or by winding a perforated plate. The mesh of the mesh structure 211 can be in the shape of, but not limited to, a circle or a special shape. The special shape can be, but not limited to, a square, a triangle, an ellipse, a diamond, or the like.

[0064] The first channel may be arranged around the flow balancing mechanism 20 along the circumferential direction of the cavity 11 , and the surrounding angle may be smaller than the circumference of the flow balancing mechanism 20 .

[0065] The cross-sectional profile of the groove 25 may be, but is not limited to, a U-shape or a rectangle.

[0066] The flow equalizing mechanism 20 is set as a mesh structure 211, and the mesh area of ​​the mesh structure 211 is smaller than the area of ​​the air inlet 13. When the protective gas is introduced into the air inlet 13, the gas in the first channel can maintain a certain positive pressure, so that the gas can pass through the mesh structure 211 evenly to reduce the probability of turbulence, thereby improving the welding quality.

[0067] In some embodiments, the mesh area is 5%-10% smaller than the area of ​​the air inlet hole 13 .

[0068] A mesh area that is too small affects the flow of the shielding gas into the cavity 11 and affects the welding quality. Under the premise that the pressure of the shielding gas is constant, in order to take into account the flow of the shielding gas and reduce the probability of turbulence in the welding nozzle connector 10, the mesh area is set to be 5%-10% smaller than the area of ​​the air inlet hole 13.

[0069] In some embodiments, please refer to Figure 1-Figure 4 The flow balancing mechanism 20 includes a breathable cylinder 21, a first sealing ring 22, and a second sealing ring 23. The breathable cylinder 21 forms a second side wall. The first sealing ring 22 is connected to one end of the breathable cylinder 21, the first sealing ring 22 is arranged around the breathable cylinder 21, and the first sealing ring 22 is sealed with the first side wall. The second sealing ring 23 is connected to the other end of the breathable cylinder 21, the second sealing ring 23 is arranged around the breathable cylinder 21, and the second sealing ring 23 is sealed with the first side wall.

[0070] The connection between the first sealing ring 22 and the air cylinder 21 and the connection between the second sealing ring 23 and the air cylinder 21 include but are not limited to welding, threaded connection or integral molding.

[0071] The air-permeable cylinder 21 may be, but is not limited to, a round cylinder or a square cylinder.

[0072] The first sealing ring 22 and the first side wall as well as the second sealing ring 23 and the first side wall can be sealed by means of sealing rings, welding or interference fit.

[0073] The first sealing ring 22 and the second sealing ring 23 are both sealed with the first side wall, which can reduce the probability of gas passing through between the first sealing ring 22 and the second sealing ring 23 and the first side wall respectively, so as to reduce the probability of local turbulence. After the shielding gas enters the first channel, it can pass through the mesh structure 211 of the second side wall more evenly, so as to improve the welding quality.

[0074] In some embodiments, the first sealing ring 22 is interference fit with the first side wall; and / or the second sealing ring 23 is interference fit with the first side wall.

[0075] As an example, the interference between the first sealing ring 22 and the first side wall and the interference between the second sealing ring 23 and the first side wall can be any value between 0.02 mm and 0.05 mm.

[0076] Therefore, on the one hand, the disassembly and assembly of the first sealing ring 22 and / or the second sealing ring 23 can be facilitated, and at the same time, the probability of gas passing between the first sealing ring 22 and the first side wall and / or between the second sealing ring 23 and the first side wall can be reduced.

[0077] In some embodiments, please refer to Figure 1 and Figure 4 The flow equalizing mechanism 20 further includes a baffle 24. The baffle 24 is located in the first channel, and is arranged opposite to the air inlet 13. The baffle 24 is connected to at least one of the air permeable tube 21, the first sealing ring 22, and the second sealing ring 23. Along the depth direction of the air inlet 13, the projection of the air inlet 13 on the baffle 24 is within the edges around the baffle 24.

[0078] The baffle plate 24 may be disposed inside the air cylinder 21 and close to the air cylinder 21 , or may be disposed outside the air cylinder 21 and spaced apart from the air cylinder 21 or close to the air cylinder 21 .

[0079] The connection between the baffle 24 and at least one of the air-permeable cylinder 21 , the first sealing ring 22 and the second sealing ring 23 may be, but is not limited to, welding, riveting or screw connection.

[0080] When the gas enters from the air inlet 13, the part of the mesh structure 211 opposite to the air inlet 13 is directly opposite to the air inlet 13 and is close to the air inlet 13, which may make the local pressure of the gas in this part of the mesh structure 211 greater than the pressure at other positions of the mesh structure 211, resulting in uneven pressure distribution and easy generation of turbulence. By setting the baffle 24, the gas is not directly blown to the part of the mesh structure 211 opposite to the air inlet 13, thereby reducing the probability of turbulence caused by excessive local pressure, so that the gas can pass through the mesh structure 211 more evenly and be ejected from the welding nozzle 120, so as to improve the welding quality.

[0081] In some embodiments, please refer to Figure 4 and Figure 6 The baffle plate 24 is disposed close to the mesh structure 211 .

[0082] Thus, the shielding gas can be prevented from entering the portion of the grid opposite to the air inlet hole 13, so that the shielding gas can flow evenly along the circumference of the grid to reduce the probability of turbulence caused by excessive local pressure.

[0083] In some embodiments, please refer to Figure 6 The baffle 24 has a first blocking end and a second blocking end along the circumferential direction of the cavity 11. The plane passing through the first blocking end and the axis of the air tube 21 is the first plane, and the plane passing through the second blocking end and the axis of the air tube 21 is the second plane. The angle between the first plane and the second plane is a, and the value range of a is 30°-60°.

[0084] When a=30°, the baffle 24 can basically block the portion of the mesh structure 211 opposite to the air inlet hole 13 to reduce the probability of excessive pressure in the portion of the mesh structure 211 opposite to the air inlet hole 13. As the angle of a increases, the blocking area can be increased. However, the increase in the blocking area of ​​the mesh structure 211 will reduce the flow rate of the protective gas. In order to take into account the flow rate of the protective gas, a is set to between 30°-60°.

[0085] In some embodiments, the value range of a is 45°-50°.

[0086] The value range of a is set between 45°-50°, which can further reduce the probability of excessive pressure in the part of the mesh structure 211 opposite to the air inlet 13 and the nearby position, and can better take into account the flow rate of the shielding gas to meet the welding requirements.

[0087] In some embodiments, please refer to Figure 1 and Figure 2 The cavity 11 includes a first cavity 111 and a second cavity 112 which are connected to each other. The air outlet is connected to the first cavity 111. A step surface 12 is provided between the first cavity 111 and the second cavity 112. The flow balancing mechanism 20 is arranged in the second cavity 112. The flow balancing mechanism 20 abuts against the step surface 12. The second cavity 112 has a first side wall.

[0088] As an example, the first cavity 111 and the second cavity 112 are both circular cavities 11, and the diameter of the first cavity 111 is smaller than the diameter of the second cavity 112, so as to form a step surface 12 between the first cavity 111 and the second cavity 112, and one of the first sealing ring 22 or the second sealing ring 23 can be pressed against the step surface 12, and the other of the first sealing ring 22 or the second sealing ring 23 is arranged flush with the end of the welding tip connector 10 away from the welding tip 120, or can be arranged to protrude or be lower than the end of the welding tip connector 10 away from the welding tip 120. The second cavity 112 passes through the second end of the welding tip connector 10, and the second end is arranged opposite to the first end, and the current equalizing mechanism 20 can be installed in the second cavity 112 from the second end.

[0089] Thus, the step surface 12 can position the flow balancing mechanism 20 to improve the installation accuracy of the relative position of the air inlet 13 and the mesh structure 211, so that the gas entering and exiting the air inlet 13 can pass through the mesh structure 211, while facilitating the installation of the flow balancing mechanism 20.

[0090] For the convenience of explanation, please refer to the following examples. Figure 1-Figure 7 , a welding head 100 of some embodiments of the present application is taken as an example for description.

[0091] The welding head 100 includes a welding nozzle 120, a protective lens assembly 130 and a welding nozzle connecting assembly 110. The air outlet is connected to the welding nozzle 120. The protective lens assembly 130 is located on a side of the welding nozzle connecting assembly 110 away from the welding head 100 and is connected to the welding nozzle connecting assembly 110.

[0092] The protective lens assembly 130 includes a protective lens 131 and an adapter 132. The adapter 132 is connected to the second end of the welding nozzle connecting assembly 110, specifically by a connector such as a bolt or a screw. The adapter 132 has a second channel inside, and the adapter 132 is installed with the protective lens 131.

[0093] During the laser welding process, the protective lens 131 is located on the light-emitting side of the laser, which can prevent dust and other impurities from entering the interior of the laser, so that the laser can work stably. The flow equalization mechanism 20 is set as a mesh structure 211, and the mesh area of ​​the mesh structure 211 is smaller than the area of ​​the air inlet 13. When the protective gas is introduced into the air inlet 13, the gas in the first channel can maintain a certain positive pressure, so that the gas can pass through the mesh structure 211 evenly to reduce the probability of turbulence, thereby improving the welding quality. At the same time, the pollution of the protective lens 131 by smoke entering the cavity 11 during the welding process can be reduced, so as to increase the service life of the protective lens 131.

[0094] Since the welding head 100 includes all the technical features of the welding nozzle connection assembly 110, the effects are the same as those described above and will not be described in detail herein.

[0095] For the convenience of description, the following embodiments are described by taking a welding device according to some embodiments of the present application as an example.

[0096] The welding device includes the welding head 100 of the above embodiment.

[0097] Since the welding device includes all the technical features of the welding head 100 described above, the effects are the same as those described above and will not be described in detail here.

[0098] In an optional embodiment of the nozzle connection assembly 110, please refer to Figure 1-Figure 7The welding nozzle connection assembly 110 includes a welding nozzle connection member 10 and a current equalizing mechanism 20. The welding nozzle connection member 10 has a cavity 11 inside, and the cavity 11 passes through the first end and the second end of the welding nozzle connection member 10 opposite to each other. The first end is provided with an air outlet connected to the cavity 11, and the welding nozzle connection member 10 is provided with an air inlet 13. The air outlet of the welding nozzle connection member 10 is used to communicate with the welding nozzle 120. The flow balancing mechanism 20 is arranged in the cavity 11. A groove 25 is provided on one side of the first side wall of the flow balancing mechanism 20 facing the cavity 11. The air inlet hole 13 passes through the first side wall. Along the depth direction of the air inlet hole 13, the projection of the air inlet hole 13 on the flow balancing mechanism 20 is located in the groove 25. The groove 25 and the first side wall jointly define a first channel. The first channel extends along the circumferential direction of the cavity 11. The first channel includes a second side wall. The second side wall is opposite to the first side wall and is arranged at intervals. At least part of the wall body of the second side wall is a mesh structure 211. The mesh area of ​​the mesh structure 211 is smaller than the area of ​​the air inlet hole 13. The mesh area is 5%-10% smaller than the area of ​​the air inlet hole 13. The flow balancing mechanism 20 includes a breathable cylinder 21, a first sealing ring 22 and a second sealing ring 23. Among them, the breathable cylinder 21 forms the second side wall. The first sealing ring 22 is connected to one end of the air-permeable cylinder 21, and the first sealing ring 22 is arranged around the air-permeable cylinder 21, and the first sealing ring 22 is sealed with the first side wall. The second sealing ring 23 is connected to the other end of the air-permeable cylinder 21, and the second sealing ring 23 is arranged around the air-permeable cylinder 21, and the second sealing ring 23 is sealed with the first side wall. The first sealing ring 22 is interference-fitted with the first side wall, and the second sealing ring 23 is interference-fitted with the first side wall. The flow-equalizing mechanism 20 also includes a baffle 24. The baffle 24 is located in the first channel, and the baffle 24 is arranged opposite to the air inlet 13. The baffle 24 is connected to at least one of the air-permeable cylinder 21, the first sealing ring 22, and the second sealing ring 23. Along the depth direction of the air inlet 13, the projection of the air inlet 13 on the baffle 24 is within the edges around the baffle 24. The baffle 24 is arranged close to the mesh structure 211. The baffle 24 has a first shielding end and a second shielding end along the circumferential direction of the cavity 11, the plane passing through the first shielding end and the axis of the air-permeable cylinder 21 is the first plane, the plane passing through the second shielding end and the axis of the air-permeable cylinder 21 is the second plane, and the angle between the first plane and the second plane is a, a=45°. The cavity 11 includes a first cavity 111 and a second cavity 112, the air outlet is connected to the first cavity 111, the first cavity 111 and the second cavity 112 are connected, the second cavity 112 passes through the second end of the welding nozzle 120, there is a step surface 12 between the first cavity 111 and the second cavity 112, the flow balancing mechanism 20 is arranged in the second cavity 112, the flow balancing mechanism 20 is against the step surface 12, and the second cavity 112 has a first side wall.

[0099] The flow equalizing mechanism 20 is set as a mesh structure 211, and the mesh area of ​​the mesh structure 211 is smaller than the area of ​​the air inlet hole 13. A baffle 24 is set at a position opposite to the air inlet hole 13. When the protective gas is introduced into the air inlet hole 13, the gas in the first channel can maintain a certain positive pressure, so that the gas can pass through the mesh structure 211 evenly, so as to reduce the probability of turbulence, thereby improving the welding quality.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A welding nozzle connection assembly, characterized in that: include: A welding nozzle connector, wherein the welding nozzle connector has a cavity inside, a first end of the welding nozzle connector is provided with an air outlet connected to the cavity, and the welding nozzle connector is further provided with an air inlet connected to the cavity, and the air outlet is used to communicate with the welding nozzle; A flow balancing mechanism is arranged in the cavity, and a groove is provided on the side of the first side wall of the cavity facing the flow balancing mechanism. The air inlet hole passes through the first side wall. Along the depth direction of the air inlet hole, the projection of the air inlet hole on the flow balancing mechanism is located in the groove. The groove and the first side wall jointly define a first channel. The first channel extends along the circumferential direction of the cavity. The first channel includes a second side wall. The second side wall is opposite to the first side wall and is spaced apart. At least part of the wall body of the second side wall is a mesh structure, and the mesh area of ​​the mesh structure is smaller than the area of ​​the air inlet hole.

2. The welding nozzle connection assembly according to claim 1, characterized in that: The mesh area is 5%-10% smaller than the air inlet area.

3. The welding nozzle connection assembly according to claim 1 or 2, characterized in that: The current balancing mechanism comprises: A ventilating cylinder, wherein the ventilating cylinder forms the second side wall; A first sealing ring connected to one end of the air-permeable cylinder, the first sealing ring is arranged around the air-permeable cylinder, and the first sealing ring is in sealing cooperation with the first side wall; A second sealing ring is connected to the other end of the air-permeable cylinder. The second sealing ring is arranged around the air-permeable cylinder. The second sealing ring is sealed and matched with the first side wall.

4. The welding nozzle connection assembly according to claim 3, characterized in that: The first sealing ring is interference fit with the first side wall; and / or the second sealing ring is interference fit with the first side wall.

5. The welding nozzle connection assembly according to claim 3, characterized in that: The current balancing mechanism further comprises: A baffle is located in the first channel, the baffle is arranged opposite to the air inlet, the baffle is connected to the air tube, at least one of the first sealing ring and the second sealing ring, and along the depth direction of the air inlet, the projection of the air inlet on the baffle is within the edges around the baffle.

6. The welding nozzle connection assembly according to claim 5, characterized in that: The baffle is disposed close to the mesh structure.

7. The welding nozzle connection assembly according to claim 5, characterized in that: The baffle has a first blocking end and a second blocking end along the circumferential direction of the cavity, the plane passing through the first blocking end and the axis of the breathable tube is the first plane, the plane passing through the second blocking end and the axis of the breathable tube is the second plane, the angle between the first plane and the second plane is a, and the value range of a is 30°-60°.

8. The welding nozzle connection assembly according to claim 7, characterized in that: The value range of a is 45°-50°.

9. The welding nozzle connection assembly according to claim 1 or 2, characterized in that: The cavity includes a first cavity and a second cavity that are connected to each other. The air outlet is connected to the first cavity. A step surface is provided between the first cavity and the second cavity. The flow balancing mechanism is arranged in the second cavity. The flow balancing mechanism abuts against the step surface. The second cavity has the first side wall.

10. A welding head, characterized in that: include: Welding nozzle; The welding nozzle connection assembly according to any one of claims 1 to 9, wherein the air outlet is connected to the welding nozzle; The protective lens assembly is located at a side of the welding nozzle connection assembly away from the welding head and is connected to the welding nozzle connection assembly.

11. A welding device, characterized in that: Comprising the welding head as claimed in claim 10.

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