Welding gun

Abstract

A welding gun comprises a tungsten electrode, a ceramic nozzle, a fixing part, a gun body and an air inlet pipe, a first through hole is formed in the gun body, a second through hole is formed in the ceramic nozzle, the ceramic nozzle is arranged at the front end of the gun body, the first through hole is correspondingly communicated with the second through hole, and the fixing part is fixedly arranged in the first through hole and the second through hole. The rear end of the tungsten electrode is connected to the fixing piece, the front end of the tungsten electrode protrudes out of the front end of the ceramic nozzle, the fixing piece is provided with a cooling hole, the cooling hole is communicated with the second through hole, the front end of the air inlet pipe is arranged at the rear end of the fixing piece and located in the first through hole, the rear end of the air inlet pipe protrudes out of the rear end of the gun body, and a pipe hole of the air inlet pipe is communicated with the cooling hole; in conclusion, the air inlet pipe (cooling system) of the welding gun is not connected into the outer side wall of the gun body but connected into the first through hole along the axis of the gun body, so that the welding gun is of a straight handle structure, a worker can easily stretch the welding gun into a deep position to weld a workpiece with a small groove angle, and the welding efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a welding torch. Background Technology

[0002] TIG welding (tungsten inert gas welding) is a commonly used gas-shielded arc welding method that uses a tungsten electrode as the welding electrode and performs welding under the protection of an inert gas such as argon. As a filler metal-free welding method, TIG welding is suitable for welding a variety of metallic materials, has a low heat input, and provides stable weld quality, making it widely used in applications with high welding requirements.

[0003] Currently, due to the advantages of automated TIG welding, such as relatively stable weld quality, high welding speed, and minimal metal filling and welding deformation, deep narrow gap automated TIG welding is mostly used for thick-thickness TIG welding. However, in complex welding environments such as irregular welds, discontinuous structures, corners, and weld repair locations, deep narrow gap automated TIG welding cannot be used, and workers still need to use conventional manual TIG welding torches (such as...). Figure 1 This type of welding torch uses a cooling system that is connected from the side of the torch body, giving it a "T" or "Y" shaped structure. This type of welding torch can generally only be used for welding with a bevel angle greater than 30°, and it is difficult to reach deeper positions for welding, making it difficult for workers to handle deeper welding positions, resulting in low welding efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a welding torch to solve the technical problem that workers have difficulty extending conventional manual TIG welding torches into deeper positions to weld workpieces with small bevel angles, resulting in low welding efficiency.

[0005] To achieve the above objectives, this utility model provides a welding torch, including a tungsten electrode, a ceramic nozzle, a fixing component, a torch body, and an air inlet pipe. The torch body has a first through hole extending in the front-rear direction, and the ceramic nozzle has a second through hole extending in the front-rear direction. The ceramic nozzle is located at the front end of the torch body, and the first through hole is correspondingly connected to the second through hole. The fixing component is fixedly located within the first and second through holes. The rear end of the tungsten electrode is connected to the fixing component, and its front end protrudes beyond the front end of the ceramic nozzle. The fixing component has a cooling hole extending in the front-rear direction, and the cooling hole is connected to the second through hole. The front end of the air inlet pipe is located at the rear end of the fixing component and within the first through hole, and the rear end of the air inlet pipe protrudes beyond the rear end of the torch body. The pipe hole of the air inlet pipe is connected to the cooling hole.

[0006] Optionally, the fixing component includes a clamp and an air guide. The rear end of the clamp is connected to the front end of the air guide. The clamp and the air guide form an air guide cavity. The clamp has a fixing hole that runs through the front and rear direction. The fixing hole communicates with the air guide cavity. The tungsten electrode passes through and is connected to the fixing hole. The rear end of the tungsten electrode is located in the air guide cavity. The cooling hole runs through the clamp and the air guide in the front and rear direction.

[0007] Optionally, the front surface of the air guiding cavity is provided with a first conical hole, and the rear surface of the air guiding cavity is provided with a second conical hole. The tungsten electrode includes a tungsten core and a core sleeve. The core sleeve is fixedly sleeved on the outer side wall of the tungsten core. The tungsten core passes through and is slidably connected to the fixed hole. The front end of the tungsten core protrudes from the front end of the ceramic nozzle, and its rear end is located in the air guiding cavity. The core sleeve is located in the air guiding cavity. The front end of the outer side wall of the core sleeve is provided with a first limiting part. The first limiting part is a chamfer or rounded corner. The inclined surface or arc surface of the first limiting part abuts against the hole wall of the first conical hole. The rear end of the core sleeve is circumferentially provided with a second limiting part. The second limiting part abuts against the hole wall of the second conical hole radially.

[0008] Optionally, the rear end of the air guide is provided with a connecting portion around its axis, the outer side wall of the connecting portion is interference-fitted to the first through hole, and the chuck is threadedly connected to the air guide.

[0009] Optionally, the fixing member is provided with a plurality of cooling holes around the axis of the tungsten electrode.

[0010] Optionally, a heat insulation sleeve is also included, which is disposed between the ceramic nozzle and the gun body to reduce the heat transferred from the ceramic nozzle to the gun body.

[0011] Optionally, the air intake and the gun body are made of a soft material so that they can be bent.

[0012] Optionally, the air intake pipe includes an inner pipe section, a connecting pipe section, and an extension pipe section connected sequentially from front to back. The front end of the inner pipe section is located at the rear end of the fixing member, and its rear end protrudes from the rear end of the gun body.

[0013] Optionally, it also includes a switch and a handheld sleeve, wherein the handheld sleeve is spaced around the outside of the air inlet pipe, the front end of the handheld sleeve is connected to the rear end of the gun body, and the switch is located on the outer wall of the handheld sleeve.

[0014] Optionally, the outer wall of the handheld sleeve is provided with a gripping part, the outer diameter of the gripping part gradually increases from front to back, and the switch is located behind the gripping part.

[0015] Compared with the prior art, the welding torch of this utility model has the following advantages:

[0016] In this invention, the welding torch has a ceramic nozzle located at the front end of the torch body. A first through hole and a second through hole are connected to each other. A fixing member is fixedly installed in the first and second through holes. A tungsten electrode is connected to the fixing member and protrudes from the front end of the ceramic nozzle, allowing the tungsten electrode to weld the position in front. Furthermore, the fixing member has a cooling hole that runs through the front and rear directions. An air inlet pipe is located at the rear end of the fixing member. The aforementioned cooling hole connects forward to the second through hole and backward to the pipe hole of the air inlet pipe. Protective gas can enter from the rear end of the air inlet pipe, pass through the air inlet pipe, the cooling hole, and the second through hole in sequence, and finally be ejected from the front end of the second through hole to cool the tungsten electrode and protect the molten pool from oxidation. In summary, the air inlet pipe (cooling system) of this invention is not connected from the outer wall of the torch body, but rather connected along the axis of the torch body to the first through hole, making the welding torch a straight handle structure. This allows the operator to easily extend the welding torch into a deeper position to weld workpieces with small bevel angles, resulting in higher welding efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a conventional manual TIG welding torch in existing technology.

[0018] Figure 2 This is a schematic diagram of the welding torch of this utility model.

[0019] Figure 3 This is a top view of the welding torch of this utility model.

[0020] Figure 4 for Figure 3 Sectional view of AA.

[0021] Figure 5 for Figure 4 A magnified view of part B in the middle.

[0022] Reference numerals: 1. Tungsten electrode; 11. Tungsten core; 12. Core sleeve; 121. First limiting part; 122. Second limiting part; 2. Ceramic nozzle; 21. Second through hole; 3. Fixing component; 31. Cooling hole; 32. Clamp; 33. Gas guide component; 34. Gas guide cavity; 35. First conical hole; 36. Second conical hole; 37. Connecting part; 4. Gun body; 5. Air inlet pipe; 51. Inner pipe section; 52. Connecting pipe section; 53. Extension pipe section; 6. Heat insulation sleeve; 7. Handheld sleeve; 71. Grip part; 8. Switch. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] like Figures 2 to 5 As shown, a welding torch of this utility model includes a tungsten electrode 1, a ceramic nozzle 2, a fixing member 3, a torch body 4, and an air inlet pipe 5. The torch body 4 has a first through hole extending in the front-rear direction, and the ceramic nozzle 2 has a second through hole 21 extending in the front-rear direction. The ceramic nozzle 2 is located at the front end of the torch body 4, and the first through hole is connected to the second through hole 21. The fixing member 3 is fixedly located in the first through hole and the second through hole 21. The rear end of the tungsten electrode 1 is connected to the fixing member 3, and its front end protrudes from the front end of the ceramic nozzle 2. The fixing member 3 has a cooling hole 31 extending in the front-rear direction, and the cooling hole 31 is connected to the second through hole 21. The front end of the air inlet pipe 5 is located at the rear end of the fixing member 3 and is located in the first through hole. The rear end of the air inlet pipe 5 protrudes from the rear end of the torch body 4, and the pipe hole of the air inlet pipe 5 is connected to the cooling hole 31.

[0027] In the above technical solution, the tungsten electrode 1 is connected to the fixing member 3 and protrudes from the front end of the ceramic nozzle 2, so that the tungsten electrode 1 can weld the position in front. Furthermore, the fixing member 3 is provided with a cooling hole 31 that runs through the front and rear directions. The air inlet pipe 5 is located at the rear end of the fixing member 3. The aforementioned cooling hole 31 is connected forward to the second through hole 21 and backward to the pipe hole of the air inlet pipe 5. The protective gas can enter from the rear end of the air inlet pipe 5, pass through the air inlet pipe 5, the cooling hole 31 and the second through hole 21 in sequence, and finally spray out from the front end of the second through hole 21 to cool the tungsten electrode 1 and protect the molten pool from oxidation. In summary, the air inlet pipe 5 (cooling system) of the welding torch of this utility model is not connected from the outer wall of the torch body 4, but is connected to the first through hole along the axis of the torch body 4, so that the welding torch has a straight handle structure. The operator can more easily extend the welding torch into a deeper position to weld workpieces with small bevel angles, and the welding efficiency is high.

[0028] Furthermore, the fixing member 3 includes a clamp 32 and a gas guide 33. The rear end of the clamp 32 is connected to the front end of the gas guide 33. The clamp 32 and the gas guide 33 form a gas guide cavity 34. The clamp 32 has a fixing hole that extends in the front-rear direction and communicates with the gas guide cavity 34. The tungsten electrode 1 passes through and is connected to the fixing hole. The rear end of the tungsten electrode 1 is located inside the gas guide cavity 34. The cooling hole 31 extends in the front-rear direction through the clamp 32 and the gas guide 33. Protective gas flows from the cooling hole 31 of the gas guide 33. After being injected into the gas-conducting cavity 34, the gas gathers within the cavity and comes into full contact with the tungsten electrode 1 located within it. This allows for alignment and cooling, and the gas is then ejected through the cooling hole 31 of the chuck 32. This ejection simultaneously cools the tungsten electrode 1 and protects the molten pool from oxidation. Additionally, the tungsten electrode 1 can be secured by the fixing hole. Furthermore, the gas guide 33 can be connected to the gun body 4 and the ceramic nozzle 2, or to either of the two. The chuck 32 can also be connected to the gun body 4 and the ceramic nozzle 2, or to either of the two. At least one of the gas guide 33 and the chuck 32 can be connected to either the gun body 4 or the ceramic nozzle 2.

[0029] Furthermore, the front surface of the air-guiding cavity 34 is provided with a first conical hole 35, and the rear surface of the air-guiding cavity 34 is provided with a second conical hole 36. The tungsten electrode 1 includes a tungsten core 11 and a core sleeve 12. The core sleeve 12 is fixedly sleeved on the outer side wall of the tungsten core 11. The tungsten core 11 passes through and is slidably connected to the fixed hole. The front end of the tungsten core 11 protrudes from the front end of the ceramic nozzle 2, and its rear end is located in the air-guiding cavity 34. The core sleeve 12 is located in the air-guiding cavity 34. The front end of the outer side wall of the core sleeve 12 is provided with a first limiting part 121. The first limiting part 121 is chamfered or rounded. The inclined surface or arc surface of the first limiting part 121 abuts against the first conical hole 35. The rear end of the core sleeve 12 is provided with a second limiting part 122 protruding circumferentially, and the second limiting part 122 abuts against the wall of the second conical hole 36 radially. The tungsten core 11 is slidably connected to the fixing hole along its axis. The front end of the core sleeve 12 is provided with a first limiting part 121, which abuts against the wall of the first conical hole 35 through its inclined surface or arc surface. The rear end is provided with a second limiting part 122 protruding circumferentially, and the second limiting part 122 abuts against the wall of the second conical hole 36 radially. This allows the fixing member 3 to be fixedly connected to the tungsten electrode 1 through multiple limiting points. After the chuck 32 and the air guide 33 are disassembled, the tungsten electrode 1 can be easily inserted into or removed from them, making it very convenient for the tungsten electrode 1 to be connected to the fixing member 3, which greatly improves the assembly efficiency.

[0030] Furthermore, the rear end of the air guide 33 is provided with a connecting part 37 around its axis. The outer side wall of the connecting part 37 is interference-fitted to the first through hole. The chuck 32 is threadedly connected to the air guide 33, so that the fixing member 3 can be stably set in the first through hole and the second through hole 21.

[0031] Furthermore, the fixing member 3 is provided with a plurality of cooling holes 31 around the axis of the tungsten electrode 1 to uniformly transport the protective gas to the surface of the tungsten electrode 1 and the molten pool, thereby obtaining a good atmosphere protection effect and improving the cooling effect of the tungsten electrode 1 and the protection of the molten pool from oxidation; preferably, the fixing member 3 is provided with six cooling holes 31 with a diameter of 0.8 mm evenly distributed around the axis of the tungsten electrode 1.

[0032] Furthermore, it also includes a heat insulation sleeve 6, which is disposed between the ceramic nozzle 2 and the gun body 4 to reduce the heat transferred from the ceramic nozzle 2 to the gun body 4, and to prevent the ceramic nozzle 2 from transferring a large amount of heat to the gun body 4 and then to the worker's hands, causing burns; wherein, the heat insulation sleeve 6 is made of a material with good heat insulation performance.

[0033] Furthermore, the air intake pipe 5 and the gun body 4 are made of soft material so that they can be bent. This allows the operator to bend the air intake pipe 5 and the gun body 4 according to the actual welding situation to ensure that the tungsten electrode 1 is welded at a suitable angle to the bevel surface, thereby ensuring a good sidewall fusion effect. Specifically, the air intake pipe 5 is made of soft brass, and the gun body 4 is made of ABS. The air intake pipe 5 and the gun body 4 can be bent from 0° to 15°.

[0034] Furthermore, the air intake pipe 5 includes an inner pipe section 51, a connecting pipe section 52, and an extension pipe section 53 connected sequentially from front to back. The front end of the inner pipe section 51 is located at the rear end of the fixing member 3, and its rear end protrudes from the rear end of the gun body 4, allowing the operator to replace different extension copper pipe sections according to their own habits and actual working conditions, so as to facilitate the operator's operation and cope with various scenarios. The extension pipe section 53 has a maximum length of 150mm to meet the welding depth of 180mm.

[0035] Furthermore, it also includes a switch 8 and a handheld sleeve 7. The handheld sleeve 7 is spaced out on the outside of the air inlet pipe 5. The front end of the handheld sleeve 7 is connected to the rear end of the gun body 4. The switch 8 is located on the outer wall of the handheld sleeve 7. The operator can hold the handheld sleeve 7 and press the switch 8 with his finger to use the welding gun.

[0036] Furthermore, the outer wall of the handheld sleeve 7 is provided with a gripping part 71, the outer diameter of the gripping part 71 gradually increases from front to back, and the switch 8 is located behind the gripping part 71 to facilitate the operator to press the switch 8 when holding the gripping part 71.

[0037] Furthermore, fixed setting and fixed connection refer to the fixed relative positional relationship of two components, including but not limited to fixing by connectors, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap-fit ​​connection.

[0038] Furthermore, the connectors include, but are not limited to, fasteners, straps, ropes, pneumatic connectors, hydraulic connectors, flanges, Velcro, and buttons.

[0039] In summary, the present invention provides a welding torch, the technical effects of which are as follows:

[0040] In this welding torch, a ceramic nozzle 2 is located at the front end of the torch body 4. A first through hole and a second through hole 21 are connected to each other. A fixing member 3 is fixedly located within the first and second through holes 21. A tungsten electrode 1 is connected to the fixing member 3 and protrudes from the front end of the ceramic nozzle 2, allowing the tungsten electrode 1 to weld at the forward position. Furthermore, the fixing member 3 has a cooling hole 31 extending in the front-rear direction. An air inlet pipe 5 is located at the rear end of the fixing member 3. The aforementioned cooling hole 31 connects forward to the second through hole 21 and backward to the pipe hole of the air inlet pipe 5, protecting... Gas can enter from the rear end of the inlet pipe 5, pass through the inlet pipe 5, cooling hole 31 and second through hole 21 in sequence, and finally be ejected from the front end of the second through hole 21 to cool the tungsten electrode 1 and protect the molten pool from oxidation. In summary, the inlet pipe 5 (cooling system) of the welding torch of this utility model is not connected from the outer wall of the torch body 4, but is connected to the first through hole along the axis of the torch body 4, so that the welding torch has a straight handle structure. The operator can more easily extend the welding torch into a deeper position to weld workpieces with small bevel angles, and the welding efficiency is high.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A welding torch, characterized in that, The gun includes a tungsten electrode (1), a ceramic nozzle (2), a fixing component (3), a gun body (4), and an air inlet pipe (5). The gun body (4) has a first through hole extending in the front-rear direction, and the ceramic nozzle (2) has a second through hole (21) extending in the front-rear direction. The ceramic nozzle (2) is located at the front end of the gun body (4). The first through hole is connected to the second through hole (21). The fixing component (3) is fixedly installed in the first through hole and the second through hole (21). The tungsten electrode (1)... The rear end is connected to the fixing member (3), and its front end protrudes from the front end of the ceramic nozzle (2). The fixing member (3) is provided with a cooling hole (31) that runs through the front and rear direction. The cooling hole (31) is connected to the second through hole (21). The front end of the air inlet pipe (5) is located at the rear end of the fixing member (3) and is located in the first through hole. The rear end of the air inlet pipe (5) protrudes from the rear end of the gun body (4). The pipe hole of the air inlet pipe (5) is connected to the cooling hole (31).

2. The welding torch according to claim 1, characterized in that, The fixing member (3) includes a clamp (32) and an air guide (33). The rear end of the clamp (32) is connected to the front end of the air guide (33). The clamp (32) and the air guide (33) form an air guide cavity (34). The clamp (32) is provided with a fixing hole that runs through the front and rear direction. The fixing hole is connected to the air guide cavity (34). The tungsten electrode (1) passes through and is connected to the fixing hole. The rear end of the tungsten electrode (1) is located in the air guide cavity (34). The cooling hole (31) runs through the clamp (32) and the air guide (33) in the front and rear direction.

3. The welding torch according to claim 2, characterized in that, The front surface of the air-guiding cavity (34) is provided with a first conical hole (35), and the rear surface of the air-guiding cavity (34) is provided with a second conical hole (36). The tungsten electrode (1) includes a tungsten core (11) and a core sleeve (12). The core sleeve (12) is fixedly sleeved on the outer side wall of the tungsten core (11). The tungsten core (11) passes through and is slidably connected to the fixed hole. The front end of the tungsten core (11) protrudes from the front end of the ceramic nozzle (2), and its rear end is located inside the air-guiding cavity (34). The core sleeve (12) is located inside the air guide cavity (34). The front end of the outer wall of the core sleeve (12) is provided with a first limiting part (121). The first limiting part (121) is chamfered or rounded. The inclined surface or arc surface of the first limiting part (121) abuts against the hole wall of the first conical hole (35). The rear end of the core sleeve (12) is provided with a second limiting part (122) protruding in a circumferential direction. The second limiting part (122) abuts against the hole wall of the second conical hole (36) radially.

4. The welding torch according to claim 2, characterized in that, The rear end of the air guide (33) is provided with a connecting part (37) around its axis. The outer side wall of the connecting part (37) is interference-fitted to the first through hole. The chuck (32) is threadedly connected to the air guide (33).

5. The welding torch according to claim 1, characterized in that, The fixing member (3) is provided with a plurality of cooling holes (31) around the axis of the tungsten electrode (1).

6. The welding torch according to claim 1, characterized in that, It also includes a heat insulation sleeve (6), which is disposed between the ceramic nozzle (2) and the gun body (4) to reduce the heat transferred from the ceramic nozzle (2) to the gun body (4).

7. The welding torch according to claim 1, characterized in that, The air intake pipe (5) and the gun body (4) are made of soft material so that the air intake pipe (5) and the gun body (4) can be bent.

8. The welding torch according to claim 1 or 6, characterized in that, The air intake pipe (5) includes an inner pipe section (51), a connecting pipe section (52) and an extension pipe section (53) connected in sequence from front to back. The front end of the inner pipe section (51) is located at the rear end of the fixing member (3), and its rear end protrudes from the rear end of the gun body (4).

9. The welding torch according to claim 1, characterized in that, It also includes a switch (8) and a hand sleeve (7), the hand sleeve (7) being spaced out on the outside of the air inlet pipe (5), the front end of the hand sleeve (7) being connected to the rear end of the gun body (4), and the switch (8) being located on the outer side wall of the hand sleeve (7).

10. The welding torch according to claim 9, characterized in that, The outer wall of the handheld sleeve (7) is provided with a gripping part (71), the outer diameter of the gripping part (71) gradually increases from front to back, and the switch (8) is located behind the gripping part (71).

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