Auxiliary welding device

Abstract

The utility model discloses an auxiliary welding device, and belongs to the technical field of welding. The auxiliary welding device comprises a welding pressing head and a dust removal piece which are connected with each other, and a through channel is formed in the welding pressing head and the dust removal piece and used for allowing laser to penetrate through for welding operation. An air inlet hole is formed in the end, away from the dust removal piece, of the welding pressing head and communicates with the channel, so that shielding gas is blown to the welding part through the air inlet hole, and impurities generated during welding are blown away; and meanwhile, an air exhaust hole communicated with the channel is formed in the dust removal piece, and impurities are exhausted through the air exhaust hole, so that air flow combining air blowing and air exhaust is formed, the impurities are removed, and the welding quality is improved.

Description

Technical Field

[0001] This application belongs to the technical field of welding, and particularly relates to an auxiliary welding device. Background Art

[0002] During the battery production process, connections between various components are involved, and welding operations are usually achieved by means such as laser welding and ultrasonic welding. For example, when using an electrical connection piece to connect a cover plate assembly and a battery cell, laser welding is usually used to weld the electrical connection piece to the pole post in the cover plate assembly. In related technologies, welding and pressing are used to assist welding to fix the welding components. However, the dust removal effect of welding and pressing in related technologies is poor, which will affect the welding quality. Summary of the Utility Model

[0003] This application aims to provide an auxiliary welding device that can solve the problem in related technologies that the dust blowing effect of welding and pressing is poor and affects the welding quality.

[0004] To solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of this application provides an auxiliary welding device, including: a welding head and a dust removal member. The welding head is connected to the dust removal member. A through channel is provided in the welding head and the dust removal member for a laser to pass through to perform a welding operation. The welding head is provided with an air inlet hole, and the air inlet hole is communicated with the channel for sending gas to the welding part. A suction hole communicated with the channel is provided in the dust removal member for sucking impurities generated during welding.

[0006] Optionally, a first channel is provided in the welding head, and a second channel is provided in the dust removal member. The first channel is communicated with the second channel to form the channel, and the suction hole is communicated with the second channel. Along the axial direction perpendicular to the channel, the size of the second channel is greater than or equal to the size of the first channel.

[0007] Optionally, the first channel includes a first sub-channel and a second sub-channel that are communicated with each other. The second sub-channel is provided on a side of the first sub-channel away from the second channel, and the air inlet hole is communicated with the second sub-channel. In the direction from the second channel to the second sub-channel, the first sub-channel gradually contracts.

[0008] Optionally, a plurality of the air inlet holes are circumferentially arranged on the side wall of the second sub-channel.

[0009] Optionally, the auxiliary welding device further includes a fairing. The fairing is provided outside one end of the welding head away from the dust removal member and encloses a rectifying cavity with the welding head, and a plurality of the air inlet holes are respectively communicated with the rectifying cavity.

[0010] Optionally, an air inlet cavity is further provided in the dust removing member, and an air inlet channel is further provided in the welding head. The air inlet channel communicates the air inlet cavity with the rectifying cavity.

[0011] Optionally, the gas transmission direction of the air inlet hole faces away from the dust removing member, and an included angle α is formed between the gas transmission direction and the axis of the channel, satisfying: 30° ≤ α ≤ 60°.

[0012] Optionally, the auxiliary welding device further includes a mounting seat. A cavity communicating with the channel is provided in the mounting seat. The dust removing member is telescopically connected to the mounting seat, and the mounting seat is used for connecting a welding device.

[0013] Optionally, a guide post is provided at one end of the mounting seat facing the dust removing member, and a guide hole is provided in the dust removing member. The guide post is slidably connected to the guide hole; an elastic member is sleeved on the guide post, one end of the elastic member abuts against the mounting seat, and the other end abuts against the dust removing member.

[0014] Optionally, the auxiliary welding device further includes a linear bearing. The linear bearing is arranged in the guide hole, and the guide post is slidably connected to the linear bearing;

[0015] Or, the auxiliary welding device further includes a linear bearing. The linear bearing is arranged in the guide hole, and a guide block is further provided in the guide hole. One end of the guide post away from the mounting seat passes through the linear bearing and is connected to the guide block, and the guide block is used to limit the relative displacement between the mounting seat and the dust removing member.

[0016] In an embodiment of the present application, the auxiliary welding device includes a welding head and a dust removing member connected to each other. A through channel is provided in both of them for a laser to pass through for welding operations; an air inlet hole is provided at one end of the welding head away from the dust removing member, and the air inlet hole communicates with the channel, so that a protective gas is blown to the welding part through the air inlet hole to blow away impurities generated during welding; meanwhile, an air extraction hole communicating with the channel is provided in the dust removing member, and the impurities are extracted through the air extraction hole, so as to form an air flow combining air blowing and air extraction to remove the impurities and improve the welding quality.

[0017] The additional aspects and advantages of the present application will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1Schematic diagram of an auxiliary welding device according to an embodiment of the present application;

[0020] Figure 2 is a sectional view taken along line A-A in Figure 1 ;

[0021] Figure 3 is a sectional view taken along line B-B in Figure 1 ;

[0022] Figure 4 Schematic diagram of a dust removal component according to an embodiment of the present application;

[0023] Figure 5 is a sectional view taken along line C-C in Figure 4 ;

[0024] Figure 6 is a sectional view taken along line D-D in Figure 4 ;

[0025] Figure 7 Schematic diagram of a welding head according to an embodiment of the present application;

[0026] Figure 8 is a sectional view taken along line E-E in Figure 7 ;

[0027] Figure 9 Schematic diagram of another auxiliary welding device according to an embodiment of the present application;

[0028] Figure 10 is a sectional view taken along line F-F in Figure 9 ;

[0029] Figure 11 is an exploded view according to an embodiment of the present application Figure 9 ;

[0030] Figure 12 Schematic diagram of the application of the auxiliary welding device according to an embodiment of the present application.

[0031] Reference numerals:

[0032] 1: Welding head; 11: Air inlet hole; 12: First channel; 121: First sub-channel; 122: Second sub-channel; 13: Fairing; 131: Fairing cavity; 14: Air inlet channel; 15: Pin hole; 2: Dust removal part; 21: Air extraction hole; 211: Sealing part; 22: Second channel; 23: Air inlet cavity; 24: Guide hole; 25: Guide block; 26: Pin shaft; 3: Mounting seat; 31: Cavity; 32: Guide post; 33: Elastic part; 34: Linear bearing; 4: Quick connector; 5: Exhaust pipe; 6: Connecting piece; 7: Battery cell; 8: End cover; 9: Channel; α: Angle; L: Dimension of the first channel; W: Dimension of the second channel. Detailed implementation manners

[0033] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0034] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / " generally means an "or" relationship between the associated objects before and after.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

[0036] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0037] Before introducing the auxiliary welding device provided by the embodiments of the present application in detail, the specific application scenarios of the auxiliary welding device will be specifically described:

[0038] During the battery preparation process, referring to Figure 12 , the tab of the battery cell 7 and the pole column on the end cap 8 are connected together through the connecting piece 6. It is necessary to weld the connecting piece 6 and the pole column on the end cap 8 together by laser welding. In the related art, generally, welding pressing is used for auxiliary welding to fix the connecting piece 6 and the end cap 8. At the same time, during welding pressing, a protective gas is blown to the welding part through a single-side nozzle, and the blown protective gas cannot well blow away the impurities generated during welding. These impurities will not only affect the energy of the laser beam during laser welding but also affect the weld quality of laser welding. To solve this problem, the present application proposes an auxiliary welding device.

[0039] The following will specifically describe the auxiliary welding device provided by the embodiments of the present application with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0040] Referring to Figure 1 , Figure 4 and Figure 5 , according to some embodiments of the present application, the auxiliary welding device includes a welding head 1 and a dust removal member 2. The welding head 1 is connected to the dust removal member 2. A through-channel 9 is provided in the welding head 1 and the dust removal member 2 for the laser to pass through for welding operations; the welding head 1 is provided with an air inlet hole 11, and the air inlet hole 11 is communicated with the channel 9 for sending gas to the welding part. A suction hole 21 communicated with the channel 9 is provided in the dust removal member 2 for sucking the impurities generated during welding.

[0041] In the embodiments of the present application, the auxiliary welding device includes a mutually connected welding head 1 and a dust removal member 2. A through-channel 9 is provided inside the two for the laser to pass through for welding operations; the welding head 1 is provided with an air inlet hole 11, and the air inlet hole 11 is communicated with the channel 9, so as to blow a protective gas to the welding part through the air inlet hole 11 to blow away the impurities generated during welding; at the same time, referring to Figure 4 and Figure 6, the dust removal member 2 is provided with air extraction holes 21 communicating with the channel 9, and impurities are extracted through the air extraction holes 21, so as to form an air flow combining blowing and extraction to remove the impurities and improve the welding quality. In some embodiments, the air inlet hole 11 is arranged at a position of the welding head 1 away from the dust removal member 2 to remove impurities within a shorter path.

[0042] In specific applications, during the laser welding process, the high energy of the laser will quickly melt the material to form a molten pool keyhole. At this time, the molten metal is very active and is extremely likely to undergo an oxidation reaction with oxygen in the air, resulting in problems such as spatter, pores, and welding slag. At the same time, the high-energy laser will ionize the metal to generate a plasma similar to fog. The metal vapor formed by these plasmas will absorb the laser beam and even exist on the working surface, causing the penetration depth to become shallower and the surface of the welding molten pool to become wider. These spatter welding slag and metal vapor form impurities during welding, and these impurities will seriously affect the welding quality. Therefore, it is necessary to send gas to the welding part to blow away these impurities. This gas is the welding shielding gas. The shielding gas includes but is not limited to: helium, argon, nitrogen, etc., and those skilled in the art can select according to actual needs, and the embodiments of the present application do not limit this.

[0043] It can be understood that, referring to Figure 1 , during laser welding, the laser beam reaches the welding position from the welding equipment for welding and needs to pass through the auxiliary welding device. Therefore, a through channel 9 is provided in the welding head 1 and the dust removal member 2, and the laser beam passes through the channel 9 to reach the welding position for welding. At the same time, the welding head 1 is provided with an air inlet hole 11, and the air inlet hole 11 communicates with the channel 9. The shielding gas is blown to the welding part through the air inlet hole 11. While protecting the welding part with the shielding gas, the impurities generated during welding can also be blown away to improve the welding quality.

[0044] At the same time, referring to Figure 4 and Figure 5 , the dust removal member 2 is also provided with air extraction holes 21 communicating with the channel 9. While the shielding gas is blown through the air inlet hole 11 to blow away the impurities, the blown-up impurities are sucked out through the air extraction holes 21. That is, the channel 9 not only serves as a channel for the laser beam to reach the welding position, but also forms an air flow channel within the channel 9. The shielding gas is blown through the air inlet hole 11 to blow up the impurities, and then the impurities in the channel 9 are timely sucked out through the air extraction holes 21 to further improve the welding quality.

[0045] Referring to Figure 3 , in some embodiments of the present application, the welding head 1 is provided with a first channel 12, and the dust removal member 2 is provided with a second channel 22. The first channel 12 communicates with the second channel 22 to form the channel 9. Referring to Figure 5 , the air extraction holes 21 communicate with the second channel 22; referring to Figure 6, along the direction perpendicular to the axis of the channel 9, the dimension W of the second channel 22 is greater than or equal to the dimension L of the first channel 12.

[0046] In the embodiment of the present application, a first channel 12 is provided in the welding head 1, and a second channel 22 is provided in the dust removal member 2. The first channel 12 communicates with the second channel 22 to form a channel 9. On the one hand, the channel 9 serves as a channel through which the laser beam passes during operation, and on the other hand, it serves as a channel for sucking impurities. Along the direction perpendicular to the axis of the channel 9, that is, along the horizontal direction, the dimension W of the second channel 22 is greater than or equal to the dimension L of the first channel 12. Thus, the protective gas sent in through the air inlet hole 11 blows the impurities and then enters the second channel 22. The second channel 22 with a larger dimension is more conducive to sucking the impurities, further improving the effect of sucking impurities.

[0047] In a specific application, refer to Figure 3 , the first channel 12 and the second channel 22 communicate vertically to form a channel 9, so that the laser beam can penetrate from the upper end of the second channel 22 and exit from the lower end of the first channel 12 to reach the welding position. At the same time, the air inlet hole 11 provided at the lower end of the welding head 1 blows the impurities generated during welding, and the air extraction hole 21 provided in the dust removal member 2 communicates with the second channel 22. Thus, the air extraction hole 21 can suck the blown impurities through the connected second channel 22 and the first channel 12.

[0048] It can be understood that, refer to Figure 3 , along the direction perpendicular to the axis of the channel 9, that is, along the horizontal direction, the second channel 22 can be a square channel or a circular channel. Similarly, the first channel 12 can be a square channel or a circular channel. The first channel 12 is adapted to the second channel 22, and those skilled in the art can select according to actual needs. The embodiment of the present application does not limit this. For example, when the first channel 12 and the second channel 22 are circular channels, the dimensions W and L are respectively the diameters of the second channel 22 and the first channel 12.

[0049] It can be understood that, refer to Figure 3 , along the direction perpendicular to the axis of the channel 9, that is, along the horizontal direction, the dimension W of the second channel 22 is greater than or equal to the dimension L of the first channel 12. For example: at the connection of the second channel 22 and the first channel 12, the dimension W of the second channel 22 is equal to the dimension L of the first channel 12, which facilitates the connection of the first channel 12 and the second channel 22 and prevents impurities from stagnating; or, the dimension W of the second channel 22 is greater than the dimension L of the end of the first channel 12 away from the second channel 22. Along the vertical direction, a channel 9 with a larger upper part and a smaller lower part is formed. After the protective gas blown in through the air inlet hole 11 blows the impurities during welding and is sucked by the air extraction hole 21 along the channel 9, the flow rate of the air flow decreases, which is more conducive to completely sucking the impurities, further improving the effect of sucking impurities.

[0050] In some embodiments of the present application, reference Figure 2 and Figure 3 The auxiliary welding device also includes a sealing member 211, which is arranged between the welding pressure head 1 and the dust removal member 2. The sealing member 211 is provided with a connecting hole, and the first channel 12 and the second channel 22 are connected through the connecting hole to form a channel 9. The sealing member 211 is used to seal the connection between the first channel 12 and the second channel 22, thereby improving the sealing performance in the channel 9 and ensuring smooth airflow in the channel 9.

[0051] In some embodiments of the present application, reference Figure 4 and Figure 7 A pin shaft 26 is provided on the side of the dust removal member 2 facing the welding pressure head 1, and a pin hole 15 is provided on the side of the welding pressure head 1 facing the dust removal member 1. The pin shaft 26 is engaged with the pin hole 15, so that when the dust removal member 2 and the welding pressure head 1 are installed, the efficiency of installation is improved through the cooperation of the pin shaft 26 and the pin hole 15. For example, when the operator cannot see the installation hole, the cooperation of the pin shaft 26 and the pin hole 15 facilitates the operator to install the dust removal member 2 and the welding pressure head 1 together, thereby improving the operating efficiency.

[0052] refer to Figure 3 and Figure 8 In some embodiments of the present application, the first channel 12 includes a first sub-channel 121 and a second sub-channel 122 that are interconnected. The second sub-channel 122 is located on a side of the first sub-channel 121 away from the second channel 22, and the air inlet 11 is connected to the second sub-channel 122; the first sub-channel 121 gradually shrinks in the direction from the second channel 22 to the second sub-channel 122.

[0053] In the embodiment of the present application, the first channel 12 includes a first sub-channel 121 and a second sub-channel 122 which are interconnected. The second sub-channel 122 is arranged on the side of the first sub-channel 121 away from the second channel 22. The air inlet 11 is connected to the second sub-channel 122, so that the protective gas is blown to the welding position through the air inlet 11. In the direction from the second channel 22 to the second sub-channel 122, that is, along the vertical direction, the first sub-channel 121 gradually shrinks to form a first sub-channel 121 which is larger at the top and smaller at the bottom, so that the flow velocity of the airflow in the channel 9 decreases when it flows from bottom to top, which makes it easier for the air suction hole 21 to absorb impurities in the airflow, thereby improving the efficiency and quality of the absorption.

[0054] Understandably, reference Figure 3 and Figure 8, in the direction from the second channel 22 to the second sub-channel 122, that is, along the vertically downward direction, the first sub-channel 121 gradually contracts to form a funnel shape. After the impurities enter the first sub-channel 121 along with the air flow, as the air flow velocity decreases, the upward floating speed will also decrease accordingly. At the same time, the larger space at the upper end of the first sub-channel 121 can also prevent the impurities from affecting the laser beam before being sucked out.

[0055] Reference Figure 2 and Figure 3 , in some embodiments of the present application, a plurality of air inlet holes 11 are circumferentially arranged in the side wall of the second sub-channel 122.

[0056] In the embodiments of the present application, a plurality of air inlet holes 11 are circumferentially arranged in the side wall of the second sub-channel 122. Through the circumferentially arranged plurality of air inlet holes 11, protective gas can be evenly blown to the welding position. At the same time, the plurality of air inlet holes 11 are also more convenient for adjusting the gas flow rate of the protective gas.

[0057] In a specific application, the protective gas blown in through the circumferentially arranged air inlet holes 11 is more likely to cover the welding surface. At the same time, the plurality of air inlet holes 11 are more convenient for adjusting the gas flow rate of the protective gas. On the one hand, it can prevent the laminar flow of the protective gas from becoming turbulent and being involved in the molten pool to form pores; on the other hand, the circumferentially arranged air inlet holes 11 are also more convenient for adjusting the temperature at the welding position to control the heat affected zone at the welding position and further improve the welding quality.

[0058] It can be understood that the second sub-channel 122 can be a square channel, a circular channel, or a channel with other shapes. Those skilled in the art can set it according to actual needs, and the embodiments of the present application do not limit this.

[0059] Refer to Figure 2 and Figure 3 , for example, when the second sub-channel 122 is a square channel, 3 air inlet holes 11 are arranged at intervals on each side wall of the square channel, so as to make the cooling speed of the protective gas on the welding position tend to be consistent while increasing the gas flow rate of the protective gas, and an ideal heat affected zone is obtained.

[0060] Reference Figure 2 and Figure 8 , in some embodiments of the present application, the auxiliary welding device further includes a fairing 13. The fairing 13 is arranged on the circumferential outer side of the end of the welding head 1 far from the dust removal member 2 and encloses a rectifying cavity 131 with the welding head 1. The plurality of air inlet holes 11 are respectively communicated with the rectifying cavity 131.

[0061] In the embodiments of the present application, the auxiliary welding device further includes a fairing 13. The fairing 13 is arranged on the outer side of the end of the welding head 1 far from the dust removal member 2. Refer to Figure 2 and Figure 8, that is, the fairing 13 is arranged outside the second sub-channel 122. The fairing 13 encloses a rectifying cavity 131 on the outer wall of the second sub-channel 122. A plurality of air inlets 11 are respectively communicated with the rectifying cavity 131, so that the protective gas enters the plurality of air inlets 11 respectively and simultaneously through the rectifying cavity 131, ensuring the consistency of the influence of the protective gas blown out from the plurality of air inlets 11 on the welding position.

[0062] In a specific application, the fairing 13 can be integrally formed with the welding head 1, which can further ensure the sealing performance of the rectifying cavity 131, or can be separately formed and then installed on the welding head 1, which can reduce the processing difficulty of the welding head 1; those skilled in the art can select according to actual needs, and the embodiments of the present application do not limit this.

[0063] Reference Figure 2 、 Figure 6 And Figure 8 , in some embodiments of the present application, an air inlet cavity 23 is further provided in the dust removing member 2, and an air inlet channel 14 is further provided in the welding head 1. The air inlet channel 14 communicates the air inlet cavity 23 with the rectifying cavity 131.

[0064] In the embodiments of the present application, reference Figure 2 , an air inlet cavity 23 is provided in the dust removing member 2, and an air inlet channel 14 is provided in the welding head 1. The air inlet channel 14 communicates the air inlet cavity 23 with the rectifying cavity 131; thus, it is convenient to transport the protective gas into the rectifying cavity 131, and then enter the welding position through the plurality of air inlets 11, forming a flow channel for the protective gas.

[0065] In a specific application, a plurality of air inlet cavities 23 and air inlet channels 14 can be correspondingly provided, so as to more conveniently adjust the air flow rate of the protective gas. For example, reference Figure 2 , two air inlet cavities 23 can be symmetrically arranged relative to the axis of the second channel 22. Correspondingly, two air inlet channels 14 can be symmetrically arranged relative to the axis of the first channel 12. Thus, when a larger flow rate of the protective gas is required, the protective gas can be input through the two air inlet cavities 23.

[0066] It can be understood that, reference Figure 2 And Figure 8 , the air inlet channel 14 can be integrally formed with the welding head 1, which can further ensure the sealing performance of the air inlet channel 14, or can be separately formed and then installed on the welding head 1, which can reduce the processing difficulty of the welding head 1; those skilled in the art can select according to actual needs, and the embodiments of the present application do not limit this.

[0067] In some embodiments of the present application, reference Figure 9 And Figure 11, the auxiliary welding device further includes a quick connector 4. One end of the quick connector 4 communicates with the air inlet chamber 23, and the other end is used to connect to the air inlet system.

[0068] In some embodiments, the auxiliary welding device further includes an exhaust pipe 5. One end of the exhaust pipe 5 communicates with the exhaust hole 21, and the other end is used to connect to the exhaust system.

[0069] In the embodiment of the present application, the auxiliary welding device further includes a quick connector 4 and an exhaust pipe 5. One end of the quick connector 4 communicates with the air inlet chamber 23 and the other end is connected to the air inlet system, and one end of the exhaust pipe 5 communicates with the exhaust hole 21 and the other end is connected to the exhaust system, so as to be more convenient to connect to the air inlet system and the exhaust system, and improve the convenience of using the auxiliary welding device.

[0070] In a specific application, refer to Figure 9 , the auxiliary welding device further includes a quick connector 4. One end of the quick connector 4 communicates with the air inlet chamber 23, and the other end is used to connect to the air inlet system. When there are two air inlet chambers 23, refer to Figure 10 , when a large flow rate of the shielding gas is not required, one of the air inlet chambers 23 is blocked with a plug to facilitate the adjustment of the flow rate of the shielding gas.

[0071] In some embodiments, the auxiliary welding device further includes an exhaust pipe 5. The exhaust pipe 5 is provided with a mounting hole, and corresponding threaded holes are provided around the exhaust hole 21. The exhaust pipe 5 is installed outside the exhaust hole 21 through bolts, so that the exhaust pipe 5 communicates with the exhaust hole 21, and the other end of the exhaust pipe 5 is used to connect to the exhaust system, so as to suck out the impurities generated during welding.

[0072] It can be understood that the quick connector 4 and the exhaust pipe 5 can also be provided at the same time, so as to facilitate the connection of the auxiliary welding device to the air inlet system and the exhaust system.

[0073] Refer to Figure 8 , in some embodiments of the present application, the gas transmission direction of the air inlet hole 11 is towards the direction away from the dust removal member 2, and the included angle α between the gas transmission direction and the axis of the channel 9 satisfies: 30° ≤ α ≤ 60°.

[0074] In the embodiment of the present application, the gas transmission direction of the air inlet hole 11 is towards the direction away from the dust removal member 2, that is, the air inlet hole 11 is arranged obliquely downward, and the included angle α between the gas transmission direction and the axis of the channel 9 satisfies: 30° ≤ α ≤ 60°. In this way, for different welding workpieces, it can ensure that the shielding gas input from the air inlet hole 11 reaches and covers the welding position, improving the welding quality.

[0075] It can be understood that the included angle α between the gas transmission direction and the axis of the channel 9 and the opening position of the air inlet hole 11 in the vertical direction should be matched to ensure that the shielding gas input from the air inlet hole 11 can cover the welding position to achieve the effect of blowing on the welding position.

[0076] In a specific application, the included angle α between the gas transmission direction and the axis of the channel 9 can be set to any value such as 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc. or the range between any two values. Those skilled in the art can select according to actual needs, and the embodiments of the present application do not limit this.

[0077] Reference Figure 9 And Figure 10 , in some embodiments of the present application, the auxiliary welding device further includes a mounting base 3. A cavity 31 communicating with the channel 9 is provided in the mounting base 3. The dust removing member 2 is telescopically connected to the mounting base 3, and the mounting base 3 is used to connect the welding equipment.

[0078] In the embodiments of the present application, the auxiliary welding device further includes a mounting base 3. The cavity 31 provided in the mounting base 3 and communicating with the channel 9 enables the laser beam to enter the channel 9 through the cavity 31 and then reach the welding position for welding operations. The dust removing member 2 is telescopically connected to the mounting base 3. When the welding head 1 applies pressure to the welding workpiece for fixation, the telescopic connection can play a certain buffering role for the welding head 1, avoiding the welding workpiece being deformed by the welding head 1.

[0079] In a specific application, referring to Figure 12 , the mounting base 3 is connected to the moving mechanism (not shown in the figure) of the welding equipment. The moving mechanism drives the mounting base 3 and the dust removing member 2 and the welding head 1 connected to the mounting base 3 to move in the horizontal direction and / or the vertical direction to reach the welding position. After the welding head 1 reaches the welding position, it abuts against the welding workpiece. Taking the welding between the connecting piece 6 and the end cover 8 as an example, the welding head 1 forms a press on the connecting piece 6 and the end cover 8. Since the material of the connecting piece 6 is usually copper or aluminum alloy and the thickness is relatively thin, it is easy to deform when stressed. Through the telescopic connection between the dust removing member 2 and the mounting base 3, when the welding head 1 abuts against the connecting piece 6, excessive pressure will not be generated, avoiding the deformation of the connecting piece 6 and forming defective products. At the same time, different welding workpieces usually have thickness differences, and the telescopic connection between the dust removing member 2 and the mounting base 3 enables the auxiliary welding device to adapt to the workpiece thickness.

[0080] Reference Figure 10 , in some embodiments of the present application, a guide post 32 is provided at one end of the mounting base 3 facing the dust removing member 2. A guide hole 24 is provided in the dust removing member 2, and the guide post 32 is slidably connected to the guide hole 24. An elastic member 33 is sleeved on the guide post 32. One end of the elastic member 33 abuts against the mounting base 3, and the other end abuts against the dust removing member 2.

[0081] In the embodiments of the present application, referring to Figure 10, one end of the mounting base 3 facing the dust removing member 2 is provided with a guiding column 32, and one side of the dust removing member 2 facing the mounting base 3 is provided with a guiding hole 24. The guiding column 32 is slidably connected to the guiding hole 24, so that a telescopic connection is formed between the dust removing member 2 and the mounting base 3. At the same time, an elastic member 33 is sleeved on the guiding column 32. One end of the elastic member 33 abuts against the mounting base 3, and the other end abuts against the dust removing member 2. In this way, when the welding head 1 presses and fixes the welding workpiece, through the sliding between the guiding column 32 and the guiding hole 24 and the elastic deformation of the elastic member 33, the auxiliary welding device can adapt to the thickness of different welding workpieces, and prevent the welding workpiece from deforming due to excessive pressure.

[0082] In a specific application, referring to Figure 10 , one end of the guiding column 32 is fixedly connected to the mounting base 3, and the other end of the guiding column 32 is slidably connected to the guiding hole 24.

[0083] It can be understood that multiple guiding columns 32 and guiding holes 24 can be provided. Referring to Figure 9 , for example, the guiding columns 32 and the guiding holes 24 can be set to 4. The 4 guiding columns 32 and guiding holes 24 are arranged at intervals around the channel 9 in sequence to ensure the stability of the telescopic connection between the dust removing member 2 and the mounting base 3.

[0084] Referring to Figure 10 and Figure 11 , in some embodiments of the present application, the auxiliary welding device further includes a linear bearing 34. The linear bearing 34 is arranged in the guiding hole 24, and the guiding column 32 is slidably connected to the linear bearing 34.

[0085] In the embodiments of the present application, the linear bearing 34 arranged in the guiding hole 24 ensures a more stable relative movement between the dust removing member 2 and the mounting base 3 through the sliding connection with the guiding column 32, so that the auxiliary welding device can adapt to the thickness of different welding workpieces, and prevent the welding workpiece from deforming due to excessive pressure.

[0086] In a specific application, the linear bearing 34 can be fixedly connected to the guiding hole 24 by interference fit or clamped in the guiding hole 24. Those skilled in the art can set it according to actual needs, and the embodiments of the present application do not limit this.

[0087] It can be understood that the linear bearing 34 includes but is not limited to a straight column type linear bearing, a box type linear bearing, a flange type linear bearing, etc. Those skilled in the art can select it according to actual needs, and the embodiments of the present application do not limit this.

[0088] Referring to Figure 10 and Figure 11, in some embodiments of the present application, a guiding block 25 is provided in the guiding hole 24. One end of the guiding column 32 away from the mounting seat 3 passes through the linear bearing 34 and is connected to the guiding block 25. The guiding block 25 is used to limit the relative displacement between the mounting seat 3 and the dust removing member 2.

[0089] In the embodiments of the present application, referring to Figure 10 and Figure 11 , a guiding block 25 is provided in the guiding hole 24. One end of the guiding column 32 away from the mounting seat 3 passes through the linear bearing 34 and is connected to the guiding block 25. In this way, after the guiding column 32 moves upward to the limit position, it is restricted by the guiding block 25 to prevent the separation between the mounting seat 3 and the dust removing member 2, thereby improving the safety during the use of the auxiliary welding device.

[0090] In a specific application, an external thread is provided at one end of the guiding column 32 away from the mounting seat 3, and a matching internal thread is provided in the guiding block 25. The guiding column 32 and the guiding block 25 are integrally formed by threaded connection between the external thread on the guiding column 32 and the internal thread in the guiding block 25. After the guiding column 32 moves upward to the limit position, the guiding block 25 abuts against the bottom end of the linear bearing 34, thereby restricting the relative displacement between the mounting seat 3 and the dust removing member 2. The guiding block 25 and the guiding column 32 can be integrally formed. One end of the guiding column 32 away from the guiding block 25 passes through the linear bearing 34, the guiding block 25 abuts against the linear bearing 34, and one end of the guiding column 32 facing the mounting seat 3 is fixedly connected to the mounting seat 3 by bolts.

[0091] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. An auxiliary welding device, characterized in that: include: A welding pressure head (1) and a dust removal member (2), wherein the welding pressure head (1) is connected to the dust removal member (2), and a through channel (9) is provided in the welding pressure head (1) and the dust removal member (2) for allowing laser to pass through for welding operation; the welding pressure head (1) is provided with an air inlet (11), and the air inlet (11) is connected to the channel (9) and is used to supply gas to the welding part; the dust removal member (2) is provided with an exhaust hole (21) connected to the channel (9) and is used to absorb impurities generated during welding.

2. The auxiliary welding device according to claim 1, characterized in that: The welding pressure head (1) is provided with a first channel (12), the dust removal component (2) is provided with a second channel (22), the first channel (12) is connected to the second channel (22) to form the channel (9), and the air extraction hole (21) is connected to the second channel (22); along an axial direction perpendicular to the channel (9), the size of the second channel (22) is greater than or equal to the size of the first channel (12).

3. The auxiliary welding device according to claim 2, characterized in that: The first channel (12) comprises a first sub-channel (121) and a second sub-channel (122) which are interconnected; the second sub-channel (122) is arranged on a side of the first sub-channel (121) away from the second channel (22); the air inlet (11) is connected to the second sub-channel (122); and the first sub-channel (121) gradually contracts in a direction from the second channel (22) to the second sub-channel (122).

4. The auxiliary welding device according to claim 3, characterized in that: A plurality of air inlet holes (11) are arranged around the side wall of the second sub-channel (122).

5. The auxiliary welding device according to claim 4, characterized in that: The auxiliary welding device further comprises a fairing (13), wherein the fairing (13) is arranged on the outer side of one end of the welding pressure head (1) away from the dust removal member (2), and is enclosed with the welding pressure head (1) to form a fairing cavity (131), and the plurality of air inlet holes (11) are respectively connected to the fairing cavity (131).

6. The auxiliary welding device according to claim 5, characterized in that: The dust removal component (2) is also provided with an air intake chamber (23), and the welding pressure head (1) is also provided with an air intake channel (14), wherein the air intake channel (14) connects the air intake chamber (23) and the rectifying chamber (131).

7. The auxiliary welding device according to any one of claims 1 to 6, characterized in that: The air delivery direction of the air inlet (11) is oriented in a direction away from the dust removal component (2), and an angle α is formed between the air delivery direction and the axis of the channel (9), satisfying the following conditions: 30°≤α≤60°.

8. The auxiliary welding device according to claim 1, characterized in that: The auxiliary welding device further comprises a mounting seat (3), wherein a cavity (31) communicating with the channel (9) is provided in the mounting seat (3), the dust removal member (2) is telescopically connected to the mounting seat (3), and the mounting seat (3) is used to connect the welding equipment.

9. The auxiliary welding device according to claim 8, characterized in that: A guide column (32) is provided at one end of the mounting seat (3) facing the dust removing member (2); a guide hole (24) is provided in the dust removing member (2); the guide column (32) is slidably connected to the guide hole (24); an elastic member (33) is sleeved on the guide column (32); one end of the elastic member (33) abuts against the mounting seat (3), and the other end abuts against the dust removing member (2).

10. The auxiliary welding device according to claim 9, characterized in that: The auxiliary welding device further comprises a linear bearing (34), wherein the linear bearing (34) is disposed in the guide hole (24), and the guide column (32) is slidably connected to the linear bearing (34); Alternatively, the auxiliary welding device further comprises a linear bearing (34), wherein the linear bearing (34) is arranged in the guide hole (24), wherein a guide block (25) is further arranged in the guide hole (24), wherein one end of the guide column (32) away from the mounting seat (3) passes through the linear bearing (34) and is connected to the guide block (25), wherein the guide block (25) is used to limit the relative displacement between the mounting seat (3) and the dust removal member (2).

Images