Argon arc welding gun

Abstract

The utility model belongs to the technical field of welding equipment, and discloses an argon arc welding gun. The argon arc welding gun comprises a first welding gun base body and a second welding gun base body which are arranged in the length direction of the argon arc welding gun in a spaced mode. A first groove with the diameter smaller than that of the first welding gun base body is formed in the first end of the first welding gun base body in the axial direction, a second groove with the diameter smaller than that of the second welding gun base body is formed in the first end of the second welding gun base body in the axial direction, and an opening of the first groove and an opening of the second groove are the same in size and correspond to each other in position. The argon arc welding gun further comprises an elastic piece, one end of the elastic piece is fixedly arranged in the first groove, and the other end of the elastic piece is fixedly arranged in the second groove. The argon arc welding gun is high in cooling strength, and the heating amount of the welding gun is small during large-current welding; the welding gun can swing freely when installed on the wire feeder, the welding angle of the gun head in the welding process can be adjusted at any time, and the welding seam quality is improved; the argon arc welding device is particularly suitable for argon arc welding of welding seams in small-diameter tubular parts.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, and particularly relates to a TIG welding gun. Background Art

[0002] TIG welding is a welding technology that uses argon to protect the welding material. Through a large current, the welding material melts into a liquid state on the workpiece to be welded and forms a molten pool, thereby firmly combining the workpiece to be welded and the welding material together. Since during the process of high-temperature melting welding, argon is passed for protection, contact between the welding material and oxygen in the air is avoided, and oxidation of the welding material is prevented. Therefore, TIG welding can be used for welding metal materials.

[0003] Currently, when using a TIG welding gun for TIG welding, the welding gun is usually connected to a wire feeder fixedly arranged on the ground, resulting in the immobility of the gun head part of the welding gun. It can only be welded at a fixed angle, restricting the operating position of workers. Especially for the internal welds of small-diameter tubular parts, the manual welding operation method is too difficult to implement. Since the position of the welding gun cannot be changed, when welding a workpiece, the position of the workpiece to be welded needs to be continuously adjusted to enable the welding wire to fully spread on the workpiece to be welded. This welding gun gun head with an unchangeable position has low welding efficiency, slow speed, low weld quality, and is not convenient for workers to operate. Content of the Utility Model

[0004] To solve the above-mentioned deficiencies in the prior art, the utility model aims to provide a TIG welding gun that can freely swing relative to a fixed wire feeder to improve the welding quality.

[0005] To achieve the above object, the technical solution adopted by the utility model is as follows: A TIG welding gun includes a first gun body and a second gun body spaced along the length direction of the TIG welding gun; a first groove with a diameter smaller than that of the first gun body is axially opened at the first end of the first gun body, and a second groove with a diameter smaller than that of the second gun body is axially opened at the first end of the second gun body. The openings of the first groove and the second groove are of the same size and correspond to each other in position; the TIG welding gun further includes an elastic member, one end of the elastic member is fixedly arranged in the first groove, and the other end of the elastic member is fixedly arranged in the second groove.

[0006] As a limitation to the utility model: The length of the elastic member in the free state is equal to or greater than the sum of the lengths of the first groove and the second groove.

[0007] As a limitation to the utility model: The elastic member is a spring.

[0008] As a limitation of the present utility model: The argon arc welding torch further includes a metal mesh. One end of the metal mesh is fixedly covered on the first end of the first torch body, and the other end of the metal mesh is fixedly covered on the first end of the second torch body. The length of the metal mesh is adapted to the distance between the first end of the first torch body and the first end of the second torch body.

[0009] As a limitation of the present utility model: The metal mesh is fixedly covered on the outer sides of the first end of the first torch body and the first end of the second torch body through fasteners.

[0010] As a limitation of the present utility model: The first torch body is a three-layer tubular structure. From the outside to the inside, the first torch body is respectively a first tubular structure, a second tubular structure, and a third tubular structure. The second tubular structure is contained in the first tubular structure, and the third tubular structure is contained in the second tubular structure; A first pipeline is fixedly connected to the side wall of the first tubular structure far from the elastic member, and a second pipeline is fixedly connected to the side wall of the first tubular structure close to the elastic member. The first pipeline is one of a liquid inlet pipe or a liquid outlet pipe, and the second pipeline is the other of a liquid inlet pipe or a liquid outlet pipe.

[0011] As a limitation of the present utility model: An argon gas pipeline that penetrates through the first tubular structure is fixedly connected to the outer wall of the second tubular structure on the side close to the elastic member.

[0012] As a limitation of the present utility model: There is a gap between the inner wall of the first tubular structure and the outer wall of the second tubular structure to form a first channel, and a coolant is contained in the first channel; There is a gap between the inner wall of the second tubular structure and the outer wall of the third tubular structure to form a second channel, and argon gas is contained in the second channel; The third tubular structure is a hollow structure, and a welding wire is contained inside it.

[0013] As a limitation of the present utility model: Both the first tubular structure and the second tubular structure are copper pipes, and the third tubular structure is a plastic pipe.

[0014] As a limitation of the present utility model: The coolant is water.

[0015] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects achieved by the present utility model are as follows: By dividing the argon arc welding torch into independent first and second torch bodies and connecting these two bodies with an elastic member, the welding torch head can freely swing relative to the wire feeder fixed on the ground, and the welding angle of the welding torch during the welding process can be adjusted at any time, so that its position relative to the workpiece to be welded changes. Therefore, it is not necessary to move the workpiece to be welded to form a tight and uniform weld on the workpiece to be welded, so that the welding wire can be evenly spread on the surface of the workpiece to be welded, which is beneficial to improving the effect of argon arc welding.

[0016] In addition, the water conduction pipelines are respectively connected near the tip of the welding gun and on one side of the first welding gun base close to the elastic member. By utilizing the three-layer tubular structure of the first welding gun base, a relatively long coolant flow path is formed in the first welding gun base, enabling the coolant to circulate inside the welding gun. Therefore, the welding gun can be cooled intensively conveniently and flexibly, and the tip of the welding gun, the body of the welding gun, and the welding wire can all be maintained at appropriate temperatures. The circulating coolant can quickly discharge the heat generated on each component to the outside, preventing the plastic pipe coated on the welding wire from melting due to high temperature and also preventing the molten plastic from possibly mixing into the weld seam. Therefore, the relatively long cooling cycle path is beneficial to improving the strength of the weld seam and the welding quality. Brief Description of the Drawings

[0017] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0019] In the figure: 1 - first welding gun base, 2 - second welding gun base, 3 - first end of the first welding gun base, 4 - first groove, 5 - second end of the first welding gun base, 6 - tip of the welding gun, 7 - first end of the second welding gun base, 8 - second groove, 9 - elastic member, 10 - metal mesh, 11 - fastener, 12 - first tubular structure, 13 - second tubular structure, 14 - third tubular structure, 15 - first pipeline, 16 - second pipeline, 17 - argon pipeline, 18 - first channel, 19 - second channel, 20 - protective cover. Detailed Description of the Embodiment

[0020] The following describes the preferred embodiments of the present utility model in conjunction with the drawings. It should be understood that the tungsten inert gas welding gun described herein is a preferred embodiment, which is only used to illustrate and explain the present utility model and does not constitute a limitation to the present utility model.

[0021] The orientation terms or positional relationships such as "upper", "lower", "left", and "right" described in the present utility model are based on the orientation relationship of the drawings in the specification of the present utility model, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the content protected by the present utility model.

[0022] A tungsten inert gas welding gun, as Figure 1As shown, it includes a first torch body 1 and a second torch body 2 arranged at intervals along the length direction of the argon arc welding torch. An axial first groove 4 with a diameter smaller than that of the first torch body 1 is provided at the first end 3 of the first torch body. A welding torch tip 6 is fixedly arranged at the second end 5 of the first torch body. Specifically, the welding torch tip 6 is a contact tip, which has the function of conducting current and can collect the current on the first torch body 1 and the welding wire to obtain a larger current, so as to break down the gas between the welding wire and the workpiece to be welded and form an arc. Since the arc energy formed between the welding torch tip 6 and the workpiece to be welded is large, the surface of the workpiece to be welded and the welding wire can be melted simultaneously. Therefore, the molten welding wire can closely cover the workpiece to be welded to form a weld seam.

[0023] Further, in the direction corresponding to the first groove 4, an axial second groove 8 with a diameter smaller than that of the second torch body 2 is provided at the first end 7 of the second torch body. At the same time, the second end of the second torch body is connected to a wire feeder fixed on the ground, and the wire feeder is used to continuously feed the welding wire into the argon arc welding torch. The openings of the first groove 4 and the second groove 8 are of the same size and correspond to each other in position, so as to fixedly arrange an elastic member 9 in the first groove 4 and the second groove 8. Specifically, one end of the elastic member 9 is fixedly arranged in the first groove 4, and the other end of the elastic member 9 is fixedly arranged in the second groove 8. Among them, the elastic member 9 has a bending function, which can enable the first torch body 1 to move a certain distance relative to the second torch body 2 while the second torch body 2 remains stationary, and at the same time, the position of the first torch body 1 can be adjusted within a certain angle range. Preferably, the elastic member 9 is a spring, and spring hole seats (not shown in the figure) are fixedly arranged at the ends of the first groove 4 and the second groove 8 for the spring to be inserted, and then the spring is fixed in the spring hole seat with screws, so as to firmly install the spring in the first groove 4 and the second groove 8 at the same time, preventing the spring from loosening or falling off and affecting the welding process.

[0024] It should be noted here that when the elastic member 9 is in a free state, the length of the elastic member 9 is equal to or greater than the sum of the lengths of the first groove 4 and the second groove 8. If the length of the elastic member 9 is less than the sum of the lengths of the first groove 4 and the second groove 8, after the elastic member 9 is installed in the two grooves, the elastic member 9 will be in a stretched state; after long-term use, the telescopic performance of the elastic member 9 will decrease, and the elastic member 9 needs to be frequently replaced, which is not conducive to the progress of the welding work.

[0025] Therefore, after the body of the argon arc welding gun is improved from an integral structure to be composed of two independent parts, namely the first welding gun base body 1 and the second welding gun base body 2, without moving the second welding gun base body 2, the position of the first welding gun base body 1 can be adjusted arbitrarily relative to the wire feeder fixedly arranged on the ground. The welding gun head 6 can be bent relative to the second welding gun base body 2, and the position of the welding gun head 6 can be controlled at any time to move along the surface of the workpiece to be welded, so as to weld the workpiece to be welded at multiple angles, without having to move the workpiece to be welded to a suitable position at any time, and no welding dead angle will be left on the workpiece to be welded. This construction method of the argon arc welding gun can facilitate the operation of workers and enable the welding wire to be fully spread on the workpiece to be welded, not only improving the welding efficiency but also enhancing the quality of the weld seam.

[0026] During the argon arc welding process, it is necessary to rely on the body of the welding gun and the welding wire located inside the welding gun to jointly conduct the current to the welding gun head 6 for collection. Therefore, when the body of the welding gun is divided into two parts, only the welding wire is used to conduct the high current between the first welding gun base body 1 and the second welding gun base body 2. Since the welding wire is relatively thin and has a large resistance, a large amount of heat energy will be generated when conducting the high current, which is likely to melt the welding wire and is not conducive to the smooth progress of the welding process. To solve this problem, further, the argon arc welding gun further includes a metal mesh 10. One end of the metal mesh 10 is fixedly coated on the first end 3 of the first welding gun base body, and the other end of the metal mesh 10 is fixedly coated on the first end 7 of the second welding gun base body.

[0027] As Figure 1 shown, the metal mesh 10 can completely cover the openings of the first end 3 of the first welding gun base body and the first end 7 of the second welding gun base body, and connect the first welding gun base body 1 and the second welding gun base body 2 movably. The length of the metal mesh 10 is adapted to the distance between the first end 3 of the first welding gun base body and the first end 7 of the second welding gun base body, so as to conduct the current on the surface of the second welding gun base body 2 to the surface of the first welding gun base body 1, achieving the effect of dispersing the current on the welding wire, reducing the heat generated on the welding wire, being beneficial to improving the service life of the welding wire, and enhancing the use experience of the argon arc welding gun.

[0028] In addition, the metal mesh 10 can be a mesh structure woven by multiple metal wires, and the number of metal wires in the metal mesh 10 can be adaptively adjusted according to the current during actual welding. Preferably, the metal mesh 10 can be composed of copper wires with good electrical conductivity. The number and material of the metal wires in the metal mesh 10 are not overly limited in this embodiment, as long as the current on the surface of the second welding gun base body 2 can be conveyed to the surface of the first welding gun base body 1 and the effect of dispersing the current on the welding wire can be achieved.

[0029] Furthermore, in order to firmly cover the metal mesh 10 on the first welding gun base 1 and the second welding gun base 2 at the same time, a fastener 11 is fixedly covered on the outside of the metal mesh 10. Preferably, the fastener 11 is covered on both ends of the metal mesh 10 to enhance the connection strength between the metal mesh 10 and the first welding gun base 1 and the second welding gun base 2. The fastener 11 can be a metal coil, or a component with a fixing function such as a clamp, which is not limited in this embodiment.

[0030] During the welding process, a large current will flow through the welding gun body and welding wire. If the argon arc welding gun is long, the welding gun body and welding wire will heat up seriously. Therefore, a cooling device needs to be added to the welding gun to discharge the heat from the corresponding parts to ensure the smooth progress of the welding process.

[0031] Further, the first welding gun base body 1 is a three-layer tubular structure, and the first welding gun base body 1 is respectively a first tubular structure 12, a second tubular structure 13, and a third tubular structure 14 from the outside to the inside. Among them, the first tubular structure 12 contains the second tubular structure 13, and the second tubular structure 13 contains the third tubular structure 14, and the first tubular structure 12 is fixedly connected to the side wall away from the elastic member 9, that is, the side wall close to the welding gun head 6, with a first pipeline 15, and the side wall of the first tubular structure 12 close to the elastic member 9 is fixedly connected to the second pipeline 16, the first pipeline 15 is one of the liquid inlet pipe or the liquid outlet pipe, and the second pipeline 16 is the other of the liquid inlet pipe or the liquid outlet pipe.

[0032] Specifically, in this embodiment, the first pipeline 15 is a liquid inlet pipe for conveying the coolant into the argon arc welding gun, and correspondingly, the second pipeline 16 is a liquid outlet pipe for conveying the coolant to the outside. At the same time, there is a gap between the inner wall of the first tubular structure 12 and the outer wall of the second tubular structure 13 to form a first channel 18, and the first channel 18 contains the coolant. Therefore, the coolant can sequentially pass through the passage composed of the first pipeline 15, the first channel 18, and the second pipeline 16 to realize the circulation flow inside the argon arc welding gun, and can continuously cool down the first tubular structure 12. Preferably, the coolant is water. Due to the large specific heat capacity of water, it can fully absorb the surrounding heat to achieve the purpose of cooling. In addition, other liquid media can also be selected as coolants to discharge the heat generated by the corresponding components by heat exchange. This embodiment does not impose too many restrictions on the types of coolants.

[0033] Furthermore, in order to prevent the welding wire ejected from the tip 6 of the welding torch from oxidizing after contacting the air, argon gas needs to be introduced into the argon arc welding torch to ensure the stability of the properties of the welding wire in the molten state. To this end, an argon gas pipeline 17 is fixedly connected to the outer wall of the second tubular structure 13 near the elastic member 9, and the argon gas pipeline 17 penetrates through the first tubular structure 12 in a sealed manner to prevent the mixing of argon gas and the coolant in the first channel 18.

[0034] Since it is necessary to smoothly transport argon gas to the tip 6 of the welding torch, there is a gap between the inner wall of the second tubular structure 13 and the outer wall of the third tubular structure 14 to form a second channel 19, in which argon gas is accommodated. At the same time, the third tubular structure 14 is a hollow structure, and a welding wire is accommodated inside it. Preferably, the third tubular structure 14 is a plastic pipe with insulating properties, which can prevent the welding wire in the energized state inside from coming into contact with the first tubular structure 12 also in the energized state, avoiding the generation of sparks due to a short circuit between the welding wire and the first tubular structure 12. Because the side wall of the plastic pipe is relatively smooth, it is beneficial for the welding wire to slide smoothly in the plastic pipe towards the tip 6 of the welding torch, enabling the welding wire on the wire feeder to smoothly pass through the plastic pipe and reach the tip 6 of the welding torch. Although the coolant does not directly contact the side wall of the third tubular structure 14, the coolant can contact the side wall of the second tubular structure 13 to reduce the temperature of the argon gas in the second channel 19, thereby indirectly reducing the temperature of the welding wire in the third tubular structure 14, achieving the purpose of keeping the welding torch tip, the welding torch body, and the welding wire at an appropriate temperature simultaneously.

[0035] By connecting the coolant conduits at both ends of the argon arc welding torch, the welding torch body and the tip 6 of the welding torch can be cooled simultaneously. Therefore, the cooling intensity of this argon arc welding torch is high. During high-current welding, the heat generated by the welding torch is less, and each part in the argon arc welding torch is heated relatively evenly, enabling the welding wire to melt sufficiently at the tip. At the same time, the circulating coolant can quickly discharge the heat generated on the welding torch body and the welding wire, preventing the plastic pipe covering the outside of the welding wire from melting into a molten state due to overheating of the welding wire, thus avoiding the ejection of the welding wire and the plastic together from the tip 6 of the welding torch, reducing the impurities in the weld, improving the stability of the weld, and further facilitating the smooth progress of the welding work.

[0036] Furthermore, due to the good electrical conductivity of copper, both the first tubular structure 12 and the second tubular structure 13 are made of copper tubes to achieve the purpose of conducting and dispersing the current on the welding wire, preventing the current on the welding wire from being too large and causing serious heating. For the materials of the first tubular structure 12 and the second tubular structure 13, other metal materials with good electrical conductivity can also be selected, and this embodiment does not limit this too much.

[0037] Further, in order to ensure the uniform flow of argon gas at the tip 6 of the welding torch, isolate the welding wire from oxygen, and prevent the argon gas from diffusing to the surroundings, a protective cover 20 is fixedly arranged around the outside of the tip 6 of the welding torch, and the length of the protective cover 20 is greater than the length of the tip 6 of the welding torch. Preferably, the shape of the protective cover 20 is cylindrical, which can better match the shape of the tip 6 of the welding torch. At the same time, the argon gas in the second channel 19 flows out through the gap between the protective cover 20 and the tip 6 of the welding torch, and flows uniformly along the inner wall of the cylindrical protective cover 20 towards the direction of the workpiece to be welded, which can effectively prevent the welding wire from contacting with oxygen in the air, thereby ensuring the welding quality.

Claims

1. An argon arc welding torch, characterized in that: It includes a first torch base body and a second torch base body which are arranged at intervals along the length direction of the argon arc welding torch; An axially first groove with a diameter smaller than that of the first torch base body is provided at the first end of the first torch base body, and an axially second groove with a diameter smaller than that of the second torch base body is provided at the first end of the second torch base body. The openings of the first groove and the second groove are of the same size and correspond to each other in position; The argon arc welding torch further includes an elastic member, one end of the elastic member is fixedly arranged in the first groove, and the other end of the elastic member is fixedly arranged in the second groove.

2. The argon arc welding torch according to claim 1, characterized in that: The length of the elastic member in the free state is equal to or greater than the sum of the lengths of the first groove and the second groove.

3. The argon arc welding torch according to claim 2, characterized in that: The elastic member is a spring.

4. The argon arc welding torch according to claim 3, characterized in that: It further includes a metal mesh. One end of the metal mesh is fixedly wrapped around the first end of the first torch base body, and the other end of the metal mesh is fixedly wrapped around the first end of the second torch base body. The length of the metal mesh is adapted to the distance between the first end of the first torch base body and the first end of the second torch base body.

5. The argon arc welding torch according to claim 4, characterized in that: The metal mesh is fixedly wrapped around the outer sides of the first end of the first torch base body and the first end of the second torch base body through fasteners.

6. The argon arc welding torch according to any one of claims 1 to 5, characterized in that: The first torch base body is a three-layer tubular structure. The first torch base body is composed of a first tubular structure, a second tubular structure, and a third tubular structure from outside to inside. The second tubular structure is contained in the first tubular structure, and the third tubular structure is contained in the second tubular structure; A first pipeline is fixedly connected to the side wall of the first tubular structure far from the elastic member, and a second pipeline is fixedly connected to the side wall of the first tubular structure close to the elastic member. The first pipeline is one of an inlet pipe or an outlet pipe, and the second pipeline is the other of an inlet pipe or an outlet pipe.

7. The argon arc welding torch according to claim 6, characterized in that: An argon gas pipeline that penetrates through the first tubular structure is fixedly connected to the outer wall of the second tubular structure on the side close to the elastic member.

8. The argon arc welding torch according to claim 7, characterized in that: There is a gap between the inner wall of the first tubular structure and the outer wall of the second tubular structure to form a first channel, and a coolant is accommodated in the first channel; There is a gap between the inner wall of the second tubular structure and the outer wall of the third tubular structure to form a second channel, and argon gas is accommodated in the second channel; The third tubular structure is a hollow structure, and a welding wire is accommodated inside it.

9. The argon arc welding torch according to claim 8, wherein: Both the first tubular structure and the second tubular structure are copper pipes, and the third tubular structure is a plastic pipe.

10. The argon arc welding torch according to claim 9, characterized in that: The coolant is water.

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