Welding device

Abstract

The utility model relates to the technical field of argon tungsten-arc welding equipment, and discloses a welding device capable of automatically replacing a tungsten needle, which comprises a body, a first electrode, a second electrode and a third electrode, the flow guide part is connected to one end of the body, and a first matching slope is formed in the flow guide part and inclines towards the middle of the flow guide part in the direction away from the body; the clamping mechanism is movably arranged in the first cavity, a clamping part is arranged at one end of the clamping mechanism, and the clamping part is located in the flow guide piece and matched with the first matching inclined plane; the clamping mechanism is provided with a clamping position close to the flow guide part and a loosening position far away from the flow guide part, and a clamping space for placing a tungsten needle is formed in the clamping mechanism; at the clamping position, the first matching inclined surface is propped against the clamping part, and the tungsten needle is clamped by the clamping part; at the loosening position, the first matching inclined surface is separated from the clamping part, and the clamping part loosens the tungsten needle; the driving mechanism is connected to the other end of the body; the driving end of the driving mechanism is connected with the clamping mechanism, and the driving end stretches out or retracts back to drive the clamping mechanism to move between the clamping position and the loosening position.

Description

Technical Field

[0001] The utility model relates to the technical field of tungsten inert gas welding equipment, and particularly relates to a welding device. Background Art

[0002] TIG welding (Tungsten Inert Gas Welding), also known as non-consumable inert gas shielded arc welding, is a relatively economical and effective welding technology. The principle of TIG welding is to use the arc between the tungsten electrode and the workpiece to melt the metal to form a weld. During the welding process, the tungsten electrode acts as an electrode, and the tungsten electrode is easily oxidized and contaminated during the welding process, which will affect the welding quality after oxidation. Therefore, during the TIG welding production process, the tungsten needle needs to be replaced regularly.

[0003] Currently, in related welding devices, the tungsten needle usually needs to be replaced manually, which reduces the working efficiency and operation safety. Summary of the Utility Model

[0004] In view of this, the utility model provides a welding device that can automatically replace the tungsten needle to solve the problems of reduced working efficiency and operation safety caused by manually replacing the tungsten needle.

[0005] The utility model provides a welding device, including: a body, in which a first cavity extending along a first direction is formed; a flow guiding member connected to one end of the body along the first direction; a first mating slope is formed in the flow guiding member, and the first mating slope inclines towards the middle of the flow guiding member in a direction away from the body; a clamping mechanism movably disposed in the first cavity along the first direction; one end of the clamping mechanism is provided with a clamping portion, the clamping portion is located in the flow guiding member and is arranged in cooperation with the first mating slope; the clamping mechanism has a clamping position close to the flow guiding member and a releasing position away from the flow guiding member; and a clamping space is formed in the clamping mechanism, and one end of the clamping space close to the flow guiding member is communicated with the inside of the flow guiding member for placing the tungsten needle; when in the clamping position, the first mating slope abuts against the clamping portion to clamp the tungsten needle; when in the releasing position, the first mating slope is disengaged from the clamping portion to release the tungsten needle; a driving mechanism connected to the other end of the body along the first direction; the driving end of the driving mechanism is connected to the clamping mechanism, and the driving mechanism is adapted to drive the clamping mechanism to move between the clamping position and the releasing position when the driving end extends or retracts.

[0006] Beneficial effects: In this solution, the clamping part of the clamping mechanism and the first mating inclined surface of the flow guiding part cooperate with each other to clamp the tungsten needle at the clamping position and release the tungsten needle at the release position. Moreover, the driving end of the driving mechanism drives the clamping mechanism to automatically move between the clamping position and the release position, so as to realize the automatic replacement of the tungsten needle, without manual operation, improving the operation safety, and the efficiency of replacing the tungsten needle is high. It can realize the on-line replacement of the tungsten needle without stopping the line, improving the work efficiency.

[0007] In an alternative embodiment, the clamping mechanism includes a connecting rod and a clamping assembly connected in sequence along a first direction; the connecting rod is connected between the driving end and the clamping assembly, and a floating connection structure is provided at the connection between the connecting rod and the clamping assembly; a clamping space is formed inside the clamping assembly, and the clamping part is arranged at one end of the clamping assembly away from the connecting rod.

[0008] Beneficial effects: The connecting rod and the clamping assembly are connected by a floating connection structure, which can absorb the eccentricity difference between the connecting rod and the clamping assembly, reduce the requirement for assembly precision, and then improve the flexibility of the clamping assembly, ensure good fitting between the clamping part and the first mating inclined surface, and improve the reliability of the clamping assembly for clamping the tungsten needle.

[0009] In an alternative embodiment, the floating connection structure includes a circumferential groove and a circumferential protrusion that are snap-fitted. The inner diameter of the circumferential groove is smaller than the inner diameter of the circumferential protrusion, and the axial length of the circumferential groove is greater than the axial length of the circumferential protrusion; the circumferential groove is arranged at the end of the connecting rod, and the circumferential protrusion is arranged at the end of the clamping assembly.

[0010] Beneficial effects: In this solution, the inner diameter of the circumferential groove is smaller than the inner diameter of the circumferential protrusion, so that a gap is formed at the circumferential mating surface between the circumferential groove and the circumferential protrusion, and the axial length of the circumferential groove is greater than the axial length of the circumferential protrusion, so that a gap is formed at the axial mating surface between the circumferential groove and the circumferential protrusion. The circumferential and axial gaps provide an inclined space for the connecting rod and the clamping assembly, achieving the purpose of absorbing the eccentricity difference, and then improving the flexibility of the clamping assembly. Moreover, the floating connection structure arranged in this way has a simple structure and is easy to assemble.

[0011] In an alternative embodiment, the clamping assembly includes a pressure tube and a tungsten needle clamp connected in sequence along a first direction. The first end of the pressure tube is connected to the connecting rod through a floating connection structure, and the tungsten needle clamp is inserted into the second end of the pressure tube; the pressure tube and the tungsten needle clamp jointly form a clamping space.

[0012] Beneficial effects: By providing the pressure tube, the flexibility of the tungsten needle clamp is improved by using the floating connection between the pressure tube and the connecting rod, without changing the structure of the tungsten needle clamp, which is convenient for the production and manufacture of the welding device.

[0013] In an alternative embodiment, at least one first notch is provided at the second end of the pressure tube.

[0014] Beneficial effects: A notch is provided at the second end of the pressure tube, facilitating the insertion of the tungsten needle clamp into the pressure tube and improving the convenience of assembly.

[0015] In an alternative embodiment, the driving mechanism includes an elastic member and a driving member. The driving end is formed on the driving member. The elastic member is connected to one end of the driving member away from the driving end and is adapted to provide a thrust force for the driving member when the driving end extends.

[0016] Beneficial effects: The elastic member provides a thrust force for the driving member when the driving end extends, ensuring that the clamping portion can reliably fit with the first mating inclined surface, avoiding the abnormal dropping of the tungsten needle during the automatic replacement of the tungsten needle, and improving the reliability of clamping the tungsten needle.

[0017] In an alternative embodiment, the driving mechanism is a cylinder. The elastic member is arranged in the rodless cavity of the cylinder, and the piston rod of the cylinder forms the driving member.

[0018] Beneficial effects: Using the cylinder to drive the clamping mechanism to move and arranging the elastic member in the rodless cavity can ensure the reliability of driving, avoid the abnormal dropping of the tungsten needle, and improve the reliability of clamping. Moreover, the cylinder has a fast response time and high clamping efficiency.

[0019] In an alternative embodiment, the welding device further includes a connecting block. The two ends of the connecting block in the first direction are respectively connected to the driving mechanism and the body, and a second cavity is formed in the connecting block and runs through in the first direction. The second cavity is communicated with the first cavity. The driving end and the clamping mechanism respectively pass through the second cavity from both ends of the second cavity and are connected in the second cavity.

[0020] Beneficial effects: Connecting the driving mechanism and the body through the connecting block improves the adaptability and connection strength between the driving mechanism and the body, thereby ensuring the reliability of the driving connection between the driving mechanism and the clamping mechanism and improving the reliability of automatically replacing the tungsten needle.

[0021] In an alternative embodiment, the connecting block includes a first connecting block and a second connecting block connected to each other. A positioning step portion is provided at one end of the first connecting block away from the second connecting block, and a threaded connection section is provided at one end of the second connecting block away from the first connecting block. The driving mechanism is connected to the positioning step portion, and the threaded connection section is threaded through the first cavity and is threadedly connected to the body.

[0022] Beneficial effects: The positioning step portion and the threaded connection section are respectively provided on the first connecting block and the second connecting block, improving the convenience of assembly. Moreover, the positioning step portion positions the driving mechanism, enabling the driving end to be located in the second cavity. The threaded connection section is threadedly connected in the first cavity, which can improve the coaxiality between the clamping mechanism connected to the driving end and the first cavity, avoid the interference between the clamping mechanism and the inner wall of the first cavity, affect the clamping effect, and further ensure the reliability of clamping.

[0023] In an alternative embodiment, a first sealing ring is provided between the first connecting block and the second connecting block, and a second sealing ring is provided between the first connecting block and the driving mechanism. Both the first sealing ring and the second sealing ring are arranged circumferentially around the second cavity; a third sealing ring is provided between the threaded connection section and the body.

[0024] Beneficial effects: A first sealing ring is provided between the first connecting block and the second connecting block, and a second sealing ring is provided between the first connecting block and the driving mechanism, ensuring the tightness of the second cavity; a third sealing ring is provided between the threaded connection section and the body, ensuring the tightness of the first cavity, and further ensuring the tightness inside the body, avoiding problems such as argon leakage during welding and ensuring the argon tightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the overall structure of a welding device according to an embodiment of the present invention;

[0027] Figure 2 It is a sectional view of a welding device according to an embodiment of the present invention;

[0028] Figure 3 It is Figure 2 a partial enlarged schematic view of A in

[0029] Figure 4 It is Figure 2 a partial enlarged schematic view of B in

[0030] Figure 5 It is Figure 2 a partial enlarged schematic view of C in

[0031] Figure 6 It is a schematic diagram of a partial structure of a clamping assembly according to an embodiment of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of a connecting block according to an embodiment of the present invention.

[0033] Description of the reference numerals:

[0034] 1. Body; 10. First cavity;

[0035] 2. Deflector; 21. First mating slope;

[0036] 3. Clamping mechanism; 30. Clamping space; 31. Link; 32. Pressure tube; 321. First notch; 33. Tungsten needle clamp; 331. Clamping part; 332. Second mating inclined surface; 34. Floating connection structure; 341. Annular groove; 342. Annular bump;

[0037] 4. Driving mechanism; 41. Elastic member; 42. Driving member; 421. Driving end; 43. Cylinder block; 44. Rodless cavity;

[0038] 5. Connecting block; 50. Second cavity; 51. First connecting block; 511. Positioning step portion; 52. Second connecting block; 521. Threaded connection section; 53. First sealing ring; 54. Second sealing ring; 55. Third sealing ring;

[0039] 6. Tungsten needle. Specific embodiments

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0041] The following combines Figures 1 to 7 , to describe the embodiments of the present invention.

[0042] According to an embodiment of the present invention, a welding device is provided, specifically a welding device for TIG welding, and the welding device uses a tungsten needle 6 as an electrode. As Figure 1 and 2 shown, the welding device includes: a body 1, a current guiding member 2 connected to the body 1, a driving mechanism 4, and a clamping mechanism 3 disposed in the body 1.

[0043] Specifically, a first cavity 10 extending in a first direction is formed in the body 1, and the first cavity 10 penetrates along the first direction. The current guiding member 2 is connected to one end of the body 1 along the first direction, and a first mating inclined surface 21 is formed in the current guiding member 2. Away from the body 1, the first mating inclined surface 21 is inclined toward the middle of the current guiding member 2.

[0044] Further, the clamping mechanism 3 is movably arranged in the first cavity 10 along the first direction. One end of the clamping mechanism 3 is provided with a clamping portion 331. Specifically, the end of the clamping mechanism 3 close to the diversion member 2 is provided with the clamping portion 331. The clamping portion 331 is located inside the diversion member 2 and is arranged in cooperation with the first mating inclined surface 21. The clamping mechanism 3 has a clamping position close to the diversion member 2 and a release position away from the diversion member 2. A clamping space 30 is formed in the clamping mechanism 3. One end of the clamping space 30 close to the diversion member 2 is communicated with the inside of the diversion member 2 for placing the tungsten needle 6. When in the clamping position, the first mating inclined surface 21 abuts against the clamping portion 331 to clamp the tungsten needle 6 by the clamping portion 331; when in the release position, the first mating inclined surface 21 is disengaged from the clamping portion 331 to release the tungsten needle 6 by the clamping portion 331. The above-mentioned driving mechanism 4 is connected to the other end of the main body 1 along the first direction, that is, the diversion member 2 and the driving mechanism 4 are respectively located at opposite ends of the main body 1 along the first direction. And the driving end 421 of the driving mechanism 4 is connected to the clamping mechanism 3. The driving mechanism 4 is adapted to drive the clamping mechanism 3 to move between the clamping position and the release position when the driving end 421 extends or retracts, so as to clamp or release the tungsten needle 6 by the clamping portion 331.

[0045] Take Figure 1 and Figure 2 shown as an example. The first direction specifically refers to Figure 1 and Figure 2 the up and down direction in

[0046] In this embodiment, the tungsten needle 6 is clamped at the clamping position and released at the release position by the mutual cooperation between the clamping portion 331 of the clamping mechanism 3 and the first mating inclined surface 21 of the diversion member 2. Moreover, the driving end 421 of the driving mechanism 4 is used to drive the clamping mechanism 3 to automatically move between the clamping position and the release position, so as to realize the automatic replacement of the tungsten needle 6 without manual operation, improve the operation safety, and the efficiency of replacing the tungsten needle 6 is high. The online replacement of the tungsten needle 6 can be realized without stopping the line, thus improving the working efficiency.

[0047] In some embodiments, a third cavity is formed in the diversion member 2. The third cavity is arranged to penetrate along the first direction. One end of the clamping mechanism 3 close to the diversion member 2 is located in the third cavity, and the third cavity is communicated with the clamping space 30 to facilitate the installation of the tungsten needle 6 from the outside into the clamping space. The above-mentioned first mating inclined surface 21 is formed in the third cavity.

[0048] In some embodiments, as Figure 5 shown, a second mating inclined surface 332 is provided on the outer peripheral side of the clamping portion 331. When in the clamping position, the first mating inclined surface 21 abuts against the second mating inclined surface 332 to clamp the tungsten needle 6 by the clamping portion 331; when in the release position, the first mating inclined surface 21 is disengaged from the second mating inclined surface 332 to release the tungsten needle 6 by the clamping portion 331.

[0049] The first mating inclined surface 21 described above may be set as an inclined plane or an inclined curved surface. Exemplarily, the first mating inclined surface 21 is set as a first conical surface, and the diameter of the first conical surface gradually decreases from the clamping mechanism 3 to the flow guiding member 2. Correspondingly, the second mating inclined surface 332 may be set as a second conical surface, and the diameter of the second conical surface gradually decreases from the clamping mechanism 3 to the flow guiding member 2, so as to be matched with the first conical surface.

[0050] Further, in some embodiments, as Figure 2 shown, the clamping mechanism 3 includes a connecting rod 31 and a clamping assembly connected in sequence along a first direction. The connecting rod 31 is connected between the driving end 421 and the clamping assembly, and a floating connection structure 34 is provided at the connection between the connecting rod 31 and the clamping assembly. A clamping space 30 is formed inside the clamping assembly, and the clamping portion 331 is provided at one end of the clamping assembly away from the connecting rod 31. In this embodiment, the connecting rod 31 and the clamping assembly are connected by the floating connection structure 34, which can absorb the eccentricity difference between the connecting rod 31 and the clamping assembly, reduce the requirement for assembly accuracy, and further improve the flexibility of the clamping assembly, ensure good fitting between the clamping portion 331 and the first mating inclined surface 21, and improve the reliability of the clamping assembly for clamping the tungsten needle 6.

[0051] In some embodiments, a threaded hole is provided at one end of the connecting rod 31 facing the driving end 421, and an external thread is provided at one end of the driving end 421 facing the connecting rod 31, and the connecting rod 31 is threadedly connected to the driving end 421. Among them, a reinforcing nut may also be provided between the connecting rod 31 and the driving end 421. Preferably, the driving end 421 and the connecting rod 31 are coaxially arranged.

[0052] More specifically, in some embodiments, as Figure 4 shown, the above-mentioned floating connection structure 34 includes a ring groove 341 and a ring protrusion 342 in snap-fit, the inner diameter of the ring groove 341 is smaller than the inner diameter of the ring protrusion 342, and the axial length of the ring groove 341 is greater than the axial length of the ring protrusion 342. The ring groove 341 is provided at the end of the connecting rod 31 close to the clamping assembly, and the ring protrusion 342 is provided at the end of the clamping assembly close to the connecting rod 31. In this embodiment, the inner diameter of the ring groove 341 is smaller than the inner diameter of the ring protrusion 342, so that a gap is formed at the circumferential mating surface between the ring groove 341 and the ring protrusion 342, and the axial length of the ring groove 341 is greater than the axial length of the ring protrusion 342, so that a gap is formed at the axial mating surface between the ring groove 341 and the ring protrusion 342. The circumferential and axial gaps provide an inclined space for the connecting rod 31 and the clamping assembly, achieving the purpose of absorbing the eccentricity difference, and further improving the flexibility of the clamping assembly. Moreover, the floating connection structure 34 arranged in this way has a simple structure and is easy to assemble.

[0053] In some embodiments, the clamping assembly includes a pressure tube 32 and a tungsten needle clamp 33 connected in sequence along a first direction. The first end of the pressure tube 32 is connected to the connecting rod 31 through a floating connection structure 34, and the tungsten needle clamp 33 is inserted into the second end of the pressure tube 32. The pressure tube 32 and the tungsten needle clamp 33 together form a clamping space 30, which extends along the first direction and communicates with the above-mentioned third cavity to clamp the tungsten needle 6. The above-mentioned clamping portion 331 is provided at one end of the tungsten needle clamp 33 away from the pressure tube 32. The floating connection between the pressure tube 32 and the connecting rod 31 is used to improve the flexibility of the tungsten needle clamp 33 without changing the structure of the tungsten needle clamp 33, which is convenient for the production and manufacture of the welding device.

[0054] Specifically, the tungsten needle clamp 33 is inserted into the second end of the pressure tube 32 and is in interference fit with the pressure tube 32 to realize the insertion connection between the tungsten needle clamp 33 and the pressure tube 32, that is, the tungsten needle clamp 33 and the pressure tube 32 are in a fixed connection relationship.

[0055] In some embodiments, as Figure 6 shown, at least one first notch 321 is provided at the second end of the pressure tube 32 to facilitate the insertion of the tungsten needle clamp 33 into the pressure tube 32 and improve the convenience of assembly. The present invention does not specifically limit the shape, structure and number of the first notches 321. Exemplarily, the first notch 321 is strip-shaped, and a plurality of first notches 321 are arranged at intervals along the circumferential direction of the second end of the pressure tube 32.

[0056] In some embodiments, the above-mentioned clamping portion 331 can be integrally formed on the tungsten needle clamp 33. Exemplarily, at least two second notches are provided at one end of the tungsten needle clamp 33 away from the pressure tube 32, and a jaw portion is formed between the second notches. The clamping portions 331 at one end of the tungsten needle clamp 33 away from the pressure tube 32 together form the clamping portion 331. In the clamping position, under the abutting force of the first mating inclined surface 21, the jaw portions of the clamping portion 331 approach each other to clamp the tungsten needle 6. In the loosening position, the clamping portion 331 is away from the first mating inclined surface 21, and the jaw portions are away from each other to loosen the tungsten needle 6.

[0057] It can be understood that the connecting rod 31, the pressure tube 32 and the tungsten needle clamp 33 are connected in sequence along the first direction to form the above-mentioned clamping mechanism 3. Preferably, the connecting rod 31, the pressure tube 32 and the tungsten needle clamp 33 are coaxially arranged along the first direction to improve the reliability of clamping and facilitate assembly.

[0058] In addition, the present invention does not specifically limit the shape and structure of the connecting rod 31, the pressure tube 32 and the tungsten needle clamp 33, as long as the corresponding connection and clamping functions are realized. Exemplarily, the connecting rod 31 can be a round rod, a square rod, etc., the pressure tube 32 can be a round tube, a square tube, etc., and the tungsten needle clamp 33 can also be configured as a tubular structure, and a clamping portion 331 is provided at the end of the tungsten needle clamp 33, and the clamping portion 331 can be in the shape of a tapered cylinder.

[0059] Further, in some embodiments, the driving mechanism 4 includes an elastic member 41 and a driving member 42. A driving end 421 is formed on the driving member 42. The elastic member 41 is connected to one end of the driving member 42 away from the driving end 421 and is adapted to provide a pushing force for the driving member 42 when the driving end 421 extends, so as to ensure that the clamping portion 331 can reliably fit with the first mating inclined surface 21, avoid abnormal dropping of the tungsten needle 6 during automatic replacement of the tungsten needle 6, and improve the reliability of clamping the tungsten needle 6. Exemplarily, the elastic member 41 may be a spring.

[0060] In some embodiments, the driving mechanism 4 is a cylinder. The cylinder includes a cylinder block 43 and a piston rod disposed in the cylinder block 43. The piston rod forms the driving member 42, and the elastic member 41 is disposed in the rodless cavity 44 of the cylinder. Using the cylinder to drive the clamping mechanism 3 to move and arranging the elastic member 41 in the rodless cavity 44 can ensure the reliability of driving, avoid abnormal dropping of the tungsten needle 6, and improve the clamping reliability; moreover, the cylinder has a fast response time and high clamping efficiency.

[0061] Preferably, the cylinder may be a spring-press-out type single-rod single-acting cylinder. Using the spring-press-out method, since the spring continuously applies pressure to the tungsten needle clamp 33, it is ensured that the tungsten needle 6 can always be kept in a clamped state.

[0062] Further, in some embodiments, as Figure 1 and 2 shown, the welding device further includes a connecting block 5. The two ends of the connecting block 5 in the first direction are respectively connected to the driving mechanism 4 and the body 1, and a second cavity 50 penetrating in the first direction is formed in the connecting block 5. The second cavity 50 is communicated with the first cavity 10. The driving end 421 and the clamping mechanism 3 respectively pass through the second cavity 50 from both ends of the second cavity 50 and are connected in the second cavity 50. Connecting the driving mechanism 4 and the body 1 through the connecting block 5 improves the adaptability and connection strength between the driving mechanism 4 and the body 1, thereby ensuring the reliability of the driving connection between the driving mechanism 4 and the clamping mechanism 3 and improving the reliability of automatically replacing the tungsten needle 6.

[0063] Specifically, as Figure 7As shown, in some embodiments, the connecting block 5 includes a first connecting block 51 and a second connecting block 52 connected to each other. A positioning step portion 511 is provided at one end of the first connecting block 51 away from the second connecting block 52, and a threaded connection section 521 is provided at one end of the second connecting block 52 away from the first connecting block 51. The driving mechanism 4 is connected to the positioning step portion 511, and the threaded connection section 521 is threaded through the first cavity 10 and is threadedly connected to the body 1. By providing the positioning step portion 511 and the threaded connection section 521 on the first connecting block 51 and the second connecting block 52 respectively, the convenience of assembly is improved. Moreover, the positioning step portion 511 positions the driving mechanism 4, enabling the driving end 421 to be located within the second cavity 50; the threaded connection section 521 is threadedly connected within the first cavity 10, which can improve the coaxiality of the clamping mechanism 3 connected to the driving end 421 and the first cavity 10, avoiding interference between the clamping mechanism 3 and the inner wall of the first cavity 10 and affecting the clamping effect, and further ensuring the reliability of clamping.

[0064] Among them, the first connecting block 51 and the second connecting block 52 can be connected by bolts, riveting, etc. The positioning step portion 511 and the driving mechanism 4 can also be connected by bolts, riveting, etc.

[0065] In some embodiments, a first sealing ring 53 is provided between the first connecting block 51 and the second connecting block 52, and a second sealing ring 54 is provided between the first connecting block 51 and the driving mechanism 4. Both the first sealing ring 53 and the second sealing ring 54 are arranged circumferentially around the second cavity 50 to ensure the tightness of the second cavity 50.

[0066] In some embodiments, a third sealing ring 55 is provided between the threaded connection section 521 and the body 1 to ensure the tightness of the first cavity 10.

[0067] By providing the first sealing ring 53, the second sealing ring 54 and the third sealing ring 55, the tightness inside the body 1 is ensured, avoiding problems such as argon leakage during welding and ensuring the argon tightness.

[0068] In some embodiments, the above-mentioned flow guide member 2 is threadedly connected within the first cavity 10 of the body 1, and a sealing structure is further provided at the connection between the flow guide member 2 and the body 1 to further ensure the tightness of the first cavity 10.

[0069] In some embodiments, a welding head is further connected to one end of the flow guide member 2 away from the body 1. The welding head is in a conical cylinder shape, and the inside of the welding head communicates with the third cavity to enable the tungsten needle 6 to be clamped within the clamping space 30 of the clamping assembly.

[0070] Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A welding device, characterized in that: include: A body (1), wherein a first cavity (10) extending along a first direction is formed in the body (1); A flow guide (2) connected to one end of the body (1) along the first direction; a first matching inclined surface (21) is formed in the flow guide (2), and in a direction away from the body (1), the first matching inclined surface (21) is inclined toward the middle of the flow guide (2); A clamping mechanism (3) is movably arranged in the first cavity (10) along the first direction; a clamping portion (331) is provided at one end of the clamping mechanism (3), the clamping portion (331) is located in the flow guide (2) and is arranged in cooperation with the first matching inclined surface (21); the clamping mechanism (3) has a clamping position close to the flow guide (2) and a loosening position away from the flow guide (2); and a clamping space (30) is formed in the clamping mechanism (3) ), one end of the clamping space (30) close to the guide member (2) is connected to the interior of the guide member (2) for placing a tungsten needle (6); when in the clamping position, the first matching inclined surface (21) abuts against the clamping portion (331), so that the clamping portion (331) clamps the tungsten needle (6); when in the loosening position, the first matching inclined surface (21) is disengaged from the clamping portion (331), so that the clamping portion (331) loosens the tungsten needle (6); A driving mechanism (4) is connected to the other end of the body (1) along the first direction; a driving end (421) of the driving mechanism (4) is connected to the clamping mechanism (3), and the driving mechanism (4) is suitable for driving the clamping mechanism (3) to move between a clamping position and a loosening position when the driving end (421) is extended or retracted.

2. The welding device according to claim 1, characterized in that: The clamping mechanism (3) comprises a connecting rod (31) and a clamping assembly connected in sequence along the first direction; the connecting rod (31) is connected between the driving end (421) and the clamping assembly, and a floating connection structure (34) is provided at the connection between the connecting rod (31) and the clamping assembly; the clamping space (30) is formed in the clamping assembly, and the clamping portion (331) is provided at an end of the clamping assembly away from the connecting rod (31).

3. The welding device according to claim 2, characterized in that: The floating connection structure (34) comprises an annular groove (341) and an annular protrusion (342) that are snap-fitted, the inner diameter of the annular groove (341) is smaller than the inner diameter of the annular protrusion (342), and the axial length of the annular groove (341) is greater than the axial length of the annular protrusion (342); The annular groove (341) is provided at the end of the connecting rod (31), and the annular protrusion (342) is provided at the end of the clamping assembly.

4. The welding device according to claim 2, characterized in that: The clamping assembly comprises a pressing tube (32) and a tungsten needle clamp (33) connected in sequence along the first direction, the first end of the pressing tube (32) is connected to the connecting rod (31) via the floating connection structure (34), and the tungsten needle clamp (33) is plugged into the second end of the pressing tube (32); the pressing tube (32) and the tungsten needle clamp (33) together form the clamping space (30).

5. The welding device according to claim 4, characterized in that: The second end of the pressing tube (32) is provided with at least one first notch (321).

6. The welding device according to any one of claims 1 to 5, characterized in that: The driving mechanism (4) comprises an elastic member (41) and a driving member (42), wherein the driving end (421) is formed on the driving member (42), and the elastic member (41) is connected to an end of the driving member (42) away from the driving end (421), and is suitable for providing a thrust force for the driving member (42) when the driving end (421) is extended.

7. The welding device according to claim 6, characterized in that: The driving mechanism (4) is a cylinder, the elastic member (41) is arranged in a rodless chamber (44) of the cylinder, and the piston rod of the cylinder forms the driving member (42).

8. The welding device according to any one of claims 1 to 5, characterized in that: The welding device further comprises a connecting block (5), the two ends of the connecting block (5) along the first direction being respectively connected to the driving mechanism (4) and the body (1), and a second cavity (50) penetrating along the first direction is formed in the connecting block (5), and the second cavity (50) is communicated with the first cavity (10); The driving end (421) and the clamping mechanism (3) are respectively passed through the second cavity (50) at two ends of the second cavity (50) and are connected in the second cavity (50).

9. The welding device according to claim 8, characterized in that: The connecting block (5) comprises a first connecting block (51) and a second connecting block (52) which are connected to each other, wherein one end of the first connecting block (51) away from the second connecting block (52) is provided with a positioning step portion (511), and one end of the second connecting block (52) away from the first connecting block (51) is provided with a threaded connecting section (521); The driving mechanism (4) is connected to the positioning step portion (511), and the threaded connection section (521) is threadedly inserted into the first cavity (10) and is threadedly connected to the body (1).

10. The welding device according to claim 9, characterized in that: A first sealing ring (53) is provided between the first connecting block (51) and the second connecting block (52), a second sealing ring (54) is provided between the first connecting block (51) and the driving mechanism (4), and the first sealing ring (53) and the second sealing ring (54) are both arranged around the circumference of the second cavity (50); A third sealing ring (55) is provided between the threaded connection section (521) and the body (1).

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