A welding torch device for a TIG welding robot

Abstract

The application discloses a welding torch device for a TIG welding robot, which comprises a welding torch connecting plate, an arc-shaped slide rail and a TIG welding torch. A guide wheel set is mounted on the welding torch connecting plate, the guide wheel set comprises a concentric roller and an eccentric roller, and a first rotary driving device is used for driving the arc-shaped slide rail to rotate around a central shaft. The TIG welding torch comprises a welding torch mounting plate, a torch body, a wire feeding pipe, a tungsten electrode, a water-cooled pipe assembly, a second rotary driving device and a third rotary driving device. The welding torch mounting plate is fixedly connected to the arc-shaped slide rail, the torch body is fixed to the welding torch mounting plate, the wire feeding pipe is rotatably connected to the welding torch mounting plate and is driven to rotate by the second rotary driving device, the tungsten electrode is fixedly mounted at the end of the water-cooled pipe assembly, and the water-cooled pipe assembly is rotatably connected in the torch body and is driven to rotate by the third rotary driving device. The welding torch device can adjust the inclination angle of the welding torch in real time, has the functions of adjusting the rotation angles of the welding wire and the tungsten electrode, ensures the side wall fusion and improves the welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a welding torch device for a TIG welding robot. Background Technology

[0002] In the nuclear power and pressure vessel industries, saddle-shaped welds formed by the intersection of two cylinders are mostly achieved using submerged arc welding. With the development of industrial technology, in order to improve production efficiency and the mechanical properties of products, narrow-gap TIG welding has been proposed to replace ordinary bevel submerged arc welding. Compared with ordinary bevel submerged arc welding, narrow-gap welding has the advantages of narrow bevel and less weld metal filling, which can save a lot of welding materials and welding time. In addition, the heat input is lower during narrow-gap welding, which makes the microstructure of the weld metal and heat-affected zone significantly finer, thereby improving its mechanical properties.

[0003] Because of the small bevel width in narrow-gap TIG welding, the welding torch cannot be oscillated, often resulting in incomplete fusion of the sidewalls. In addition, the path of the saddle-shaped weld is a spatial curve. If the welding torch angle is not adjusted in time when welding the saddle uphill and downhill, it will also cause the molten pool to flow downward, affecting the welding quality. Summary of the Invention

[0004] The purpose of this invention is to provide a welding torch device for TIG welding robots to solve the problems existing in the prior art. It can adjust the welding torch tilt angle in real time and has the functions of adjusting the welding wire and tungsten electrode rotation angle to ensure sidewall fusion and improve welding quality.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] The present invention provides a welding torch device for a TIG welding robot, comprising a welding torch connecting plate, an arc-shaped slide rail and a TIG welding torch;

[0007] At least two sets of guide wheel sets are installed on the welding torch connecting plate. Each guide wheel set includes a central roller and an eccentric roller. An arc-shaped slide rail is disposed between the central roller and the eccentric roller in each set of guide wheel sets. The outer edge and inner edge of the arc-shaped slide rail are respectively connected to the V-shaped grooves on the central roller and the eccentric roller. The arc-shaped slide rail is connected to a first rotary drive device, which is used to drive the arc-shaped slide rail to rotate around its central axis.

[0008] The TIG welding torch includes a torch mounting plate, a torch body, a wire feed tube, a tungsten electrode, a water-cooling tube assembly, a second rotary drive device, and a third rotary drive device. The torch mounting plate is fixedly connected to the arc-shaped slide rail. The torch body is fixed to the torch mounting plate via an insulating support. The wire feed tube is rotatably connected to the torch mounting plate and driven to rotate by the second rotary drive device. The tungsten electrode is fixedly mounted at the end of the water-cooling tube assembly. The water-cooling tube assembly is rotatably connected to the torch body and driven to rotate by the third rotary drive device. In the initial state, the tip of the tungsten electrode coincides with the rotation center of the arc-shaped slide rail.

[0009] Preferably, the first rotary drive device includes an arc-shaped gear ring, a first motor, and a first drive gear. The arc-shaped gear ring is fixedly connected to the arc-shaped slide rail and is coaxial with the arc-shaped slide rail. The first motor is mounted on the welding torch connecting plate, and the first drive gear is fixedly connected to the output shaft of the first motor. The first drive gear meshes with the arc-shaped gear ring.

[0010] Preferably, the second rotary drive device includes a second motor, a second driving gear, and a second driven gear. The second motor is mounted on the welding torch mounting plate via a second motor mount. The second driving gear is fixedly connected to the output shaft of the second motor. The second driven gear is fixedly connected to the beginning of the wire feeding tube and meshes with the second driving gear. Both the second motor mount and the second driving gear are made of high-temperature resistant insulating material.

[0011] Preferably, the two ends of the wire feeding tube are respectively disposed in two wire feeding tube fixing clamps, and the wire feeding tube can rotate within the wire feeding tube fixing clamps. The wire feeding tube fixing clamps are fixedly mounted on the welding gun mounting plate. The wire feeding tube fixing clamps are made of copper and are connected to the hot wire power supply. When working, the hot wire current is transmitted to the wire feeding tube through the wire feeding tube fixing clamps to heat the welding wire. The outer wall of the wire feeding tube is provided with a high-temperature resistant coating and is covered with a high-temperature resistant fiberglass sleeve. The end of the wire feeding tube is threaded with a conductive nozzle.

[0012] Preferably, the third rotary drive device includes a third motor, a third driving gear, and a third driven gear. The third motor is mounted on the welding torch mounting plate via a third motor mount. The third driving gear is fixedly connected to the output shaft of the third motor. The third driven gear is fixedly connected to the beginning of the water-cooled pipe assembly and meshes with the third driving gear. Both the third motor mount and the third driving gear are made of high-temperature resistant insulating material.

[0013] Preferably, the water-cooled pipe assembly includes an inner water-cooled pipe, an outer water-cooled pipe, a water-cooled pipe end cap, and a water-cooled pipe connector. The outer water-cooled pipe is sleeved outside the inner water-cooled pipe, and an annular flow channel is formed between the two. The beginning ends of both the outer and inner water-cooled pipes are sealed and fixedly connected to the water-cooled pipe connector. The water-cooled pipe connector blocks the beginning end of the annular flow channel. The end of the outer water-cooled pipe is fixedly connected to the water-cooled pipe end cap and blocked by the water-cooled pipe end cap. The beginning end of the inner water-cooled pipe is a water inlet end, and the end extends to the water-cooled pipe end cap and communicates with the end of the annular flow channel. The water-cooled pipe connector is provided with a water return connector communicating with the beginning end of the annular flow channel. The outer water-cooled pipe is installed inside the gun body with a clearance fit between the two. An outer insulating sleeve is fixedly sleeved on the outer water-cooled pipe.

[0014] Preferably, a tungsten electrode clamp is fixedly installed on the water-cooled pipe end cap by bolts. The tungsten electrode clamp is used to clamp and fix the tungsten electrode. The welding current is transmitted to the tungsten electrode through the water-cooled pipe joint, the external water-cooled pipe, the water-cooled pipe end cap, and the tungsten electrode clamp.

[0015] Preferably, the system further includes a first protective gas tube, a first gas screen, a second protective gas tube, a second gas screen, and a second gas shield. The first protective gas tube is mounted on the gun body and located between the wire feed tube and the water-cooling tube assembly. The end of the first protective gas tube leads to a first gas chamber on the gun body, and the outlet of the first gas chamber faces the tungsten electrode. The first gas screen is disposed inside the outlet of the first gas chamber. The second protective gas tube is mounted on the gun body and located outside the water-cooling tube assembly. The second gas shield is mounted on the gun body and close to the tungsten electrode. The end of the second protective gas tube leads to the second gas shield. The outlet of the second gas shield is located above one side of the tungsten electrode, and the second gas screen is disposed inside the outlet of the second gas shield.

[0016] Preferably, the assembly further includes a third protective gas pipe, a third protective gas cover, and a third protective gas cavity. One third protective gas cavity is slidably connected to each side of the welding torch mounting plate. A third protective gas cover is fixedly connected to each of the two third protective gas cavities. The two third protective gas cavities are respectively connected to the ends of the two third protective gas pipes. The outlet of the third protective gas cavity leads to the inside of the third protective gas cover. A third protective gas screen is provided inside the outlet of the third protective gas cavity. The outlet of the third protective gas cover faces the tungsten electrode and is located above the tungsten electrode.

[0017] Preferably, both ends of the arc-shaped slide rail are provided with limiting baffles, which are used to cooperate with the guide wheel groups at both ends to limit the rotation angle of the arc-shaped slide rail; the gun body, the insulating support and the outer insulating sleeve of the water-cooling pipe are all made of high-temperature resistant insulating material.

[0018] The present invention achieves the following technical effects compared to the prior art:

[0019] This invention provides a welding torch device for a TIG welding robot. A first rotary drive device can drive an arc-shaped slide rail to rotate around its central axis, thereby causing the TIG welding torch to swing and adjust the welding torch tilt angle in real time. A second rotary drive device and a third rotary drive device can respectively adjust the welding wire and the tungsten electrode rotation angle, thereby ensuring sidewall fusion during welding, avoiding molten pool downflow, and improving welding quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the welding torch device for a TIG welding robot provided by the present invention;

[0022] Figure 2 This is a front view structural schematic diagram of the welding torch device for a TIG welding robot provided by the present invention;

[0023] Figure 3 This is a side view of the welding torch device for a TIG welding robot provided by the present invention.

[0024] Figure 4 This is a schematic diagram of the TIG welding torch in this invention;

[0025] Figure 5 This is a side cross-sectional view of the welding torch device for a TIG welding robot provided by the present invention.

[0026] Figure 6 This is a schematic diagram of the structural connection between the water-cooled pipe assembly and the tungsten electrode in this invention.

[0027] In the diagram: 1-Welding torch assembly for TIG welding robot, 2-Welding torch connecting plate, 3-Central roller, 4-Arc-shaped slide rail, 5-Limiting baffle, 6-Eccentric roller, 7-TIG welding torch, 8-Arc-shaped gear ring, 9-First motor, 10-First driving gear, 701-Welding torch mounting plate, 702-Second motor, 703-Second motor base, 704-Second driven gear, 705-Wire feed tube clamp, 706-Wire feed tube, 707-Gun body, 708-First protective gas tube, 709-First gas screen, 710-Conductive nozzle, 711-Tungsten electrode, 7 12-Tungsten electrode clamp, 713-Water-cooled pipe end cap, 714-Insulating sleeve, 715-Second gas screen, 716-Second gas shield, 717-Second protective gas pipe, 718-Inner water-cooled pipe, 719-Outer water-cooled pipe, 720-Water-cooled pipe outer insulating sleeve, 721-Third motor base, 722-Water-cooled pipe connector, 723-Third driven gear, 724-Third motor, 725-Insulating support, 726-Third driving gear, 727-Third protective gas pipe, 728-Third protective gas cavity, 729-Third protective gas outer cover, 730-Third protective gas screen. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The purpose of this invention is to provide a welding torch device for TIG welding robots to solve the problems existing in the prior art. It can adjust the welding torch tilt angle in real time and has the functions of adjusting the welding wire and tungsten electrode rotation angle to ensure sidewall fusion and improve welding quality.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1-6 As shown, this embodiment provides a welding torch device 1 for a TIG welding robot, including a welding torch connecting plate 2, an arc-shaped slide rail 4, and a TIG welding torch 7;

[0032] At least two sets of guide wheel sets are installed on the welding torch connecting plate 2. The guide wheel sets include a central roller 3 and an eccentric roller 6. An arc-shaped slide rail 4 is disposed between the central roller 3 and the eccentric roller 6 of each set of guide wheel sets. The outer edge and inner edge of the arc-shaped slide rail 4 are respectively connected to the V-shaped grooves on the central roller 3 and the eccentric roller 6. The arc-shaped slide rail 4 is connected to the first rotary drive device. The first rotary drive device is used to drive the arc-shaped slide rail 4 to rotate around its central axis.

[0033] The TIG welding torch 7 includes a torch mounting plate 701, a torch body 707, a wire feed tube 706, a tungsten electrode 711, a water-cooling tube assembly, a second rotary drive device, and a third rotary drive device. The torch mounting plate 701 is fixedly connected to the arc-shaped slide rail 4. The torch body 707 is fixed to the torch mounting plate 701 by an insulating support 725. The wire feed tube 706 is rotatably connected to the torch mounting plate 701 and is driven to rotate by the second rotary drive device. The tungsten electrode 711 is fixedly installed at the end of the water-cooling tube assembly, which is rotatably connected inside the torch body 707 and is driven to rotate by the third rotary drive device. In the initial state, the tip of the tungsten electrode 711 coincides with the rotation center of the arc-shaped slide rail 4.

[0034] In use, the first rotary drive device drives the arc-shaped slide rail 4 to rotate around its central axis, thereby causing the TIG welding torch 7 to swing and adjust the torch tilt angle in real time. In the initial state, the tip of the tungsten electrode 711 coincides with the rotation center of the arc-shaped slide rail 4. Therefore, during the rotation of the TIG welding torch 7, the tip of the tungsten electrode 711 remains stationary at the rotation center, thus ensuring that the vertical distance between the tip of the tungsten electrode 711 and the weld remains unchanged when the TIG welding torch 7 is adjusted. The second and third rotary drive devices can adjust the welding wire and the rotation angle of the tungsten electrode 711 respectively, thereby ensuring sidewall fusion during welding, preventing the molten pool from flowing downwards, and improving welding quality.

[0035] In this embodiment, the first rotary drive device includes an arc-shaped gear ring 8, a first motor 9, and a first drive gear 10. The arc-shaped gear ring 8 is fixedly connected to the arc-shaped slide rail 4 and is coaxial with the arc-shaped slide rail 4. The first motor 9 is mounted on the welding torch connecting plate 2, and the first drive gear 10 is fixedly connected to the output shaft of the first motor 9. The first drive gear 10 meshes with the arc-shaped gear ring 8. The arc-shaped slide rail 4 is driven to rotate through the gear and gear ring transmission method, resulting in a stable structure and reliable transmission.

[0036] In this embodiment, the second rotary drive device includes a second motor 702, a second driving gear, and a second driven gear 704. The second motor 702 is mounted on the welding torch mounting plate 701 via a second motor mount 703. The second driving gear is fixedly connected to the output shaft of the second motor 702, and the second driven gear 704 is fixedly connected to the beginning of the wire feeding tube 706 and meshes with the second driving gear. Both the second motor mount 702 and the second driving gear 704 are made of high-temperature resistant insulating material. The second motor 702 drives the second driving gear to rotate, which in turn drives the second driven gear 704 to rotate, thereby driving the wire feeding tube 706 to rotate and adjusting the angle of the welding wire inside. The use of high-temperature resistant insulating material for both the second motor mount 703 and the second driving gear 704 ensures that the welding current does not damage the second motor 702.

[0037] In this embodiment, the two ends of the wire feeding tube 706 are respectively disposed in two wire feeding tube fixing clamps 705. The wire feeding tube 706 can rotate within the wire feeding tube fixing clamps 705, which are fixedly mounted on the welding gun mounting plate 701. The wire feeding tube fixing clamps 705 are made of copper and are connected to the hot wire power supply. When working, the hot wire current is transmitted to the wire feeding tube 706 through the wire feeding tube fixing clamps 705 to heat the welding wire. The hot wire TIG welding method is adopted to improve welding efficiency and welding quality. The outer wall of the wire feeding tube 706 is provided with a high-temperature resistant coating and is covered with a high-temperature resistant fiberglass sleeve. The safety is ensured by setting up double safety measures. The end of the wire feeding tube 706 is threadedly connected to a conductive nozzle 710, which is easy to replace.

[0038] In this embodiment, the third rotary drive device includes a third motor 724, a third driving gear 726, and a third driven gear 723. The third motor 724 is mounted on the welding torch mounting plate 701 via a third motor mount 721. The third driving gear 726 is fixedly connected to the output shaft of the third motor 724, and the third driven gear 723 is fixedly connected to the beginning of the water-cooled pipe assembly and meshes with the third driving gear 726. Both the third motor mount 721 and the third driving gear 726 are made of high-temperature resistant insulating material. The third motor 724 drives the third driving gear 726 to rotate, which in turn drives the third driven gear 723 to rotate, thereby rotating the water-cooled pipe assembly and adjusting the angle of the tungsten electrode 711 connected to its end. The use of high-temperature resistant insulating material for both the third motor mount 721 and the third driving gear 726 ensures that the welding current does not damage the third motor 724.

[0039] In this embodiment, the water-cooled pipe assembly includes an inner water-cooled pipe 718, an outer water-cooled pipe 719, a water-cooled pipe end cap 713, and a water-cooled pipe connector 722. The outer water-cooled pipe 719 is sleeved outside the inner water-cooled pipe 718, and an annular flow channel is formed between them. The beginning ends of both the outer water-cooled pipe 719 and the inner water-cooled pipe 718 are sealed and fixedly connected to the water-cooled pipe connector 713. The water-cooled pipe connector 713 blocks the beginning end of the annular flow channel. The end of the outer water-cooled pipe 719 is fixedly connected to the water-cooled pipe end cap 713 and is blocked by the water-cooled pipe end cap 713. The first end of the cooling pipe 718 is the water inlet end, and the last end extends to the water-cooled pipe end cap 713 and connects to the end of the annular flow channel. The water-cooled pipe connector 713 is provided with a return water connector that connects to the first end of the annular flow channel. The external water-cooled pipe 719 is installed inside the gun body 707 and the two are fitted with a clearance. The exposed part in the middle of the external water-cooled pipe 719 is fixedly fitted with an external insulating sleeve 720 for insulation protection. The exposed part at the end of the external water-cooled pipe 719 corresponding to the water-cooled pipe end cap 713 is fixedly fitted with an insulating sleeve 714 for insulation protection. The water-cooled pipe end cap 713, inner water-cooled pipe 718, outer water-cooled pipe 719, and water-cooled pipe joint 722 are welded together to form a whole while ensuring airtightness. Cooling water enters the inner water-cooled pipe 718 from the first end, and then enters the annular flow channel between the outer water-cooled pipe 719 and the inner water-cooled pipe 718 from the end of the inner water-cooled pipe 718. Finally, it flows out from the return water connector on the water-cooled pipe joint 713 to achieve circulating cooling.

[0040] In this embodiment, a tungsten electrode clamp 712 is fixedly installed on the water-cooled pipe end cap 713 by bolts. The tungsten electrode clamp 712 is used to clamp and fix the tungsten electrode 711. The welding current is transmitted to the tungsten electrode 711 through the water-cooled pipe connector 713, the external water-cooled pipe 719, the water-cooled pipe end cap 713 and the tungsten electrode clamp 712 to perform the welding operation.

[0041] In this embodiment, the system also includes a first protective gas tube 708, a first gas screen 709, a second protective gas tube 717, a second gas screen 715, and a second gas shield 716. The first protective gas tube 708 is mounted on the gun body 707 and located between the wire feed tube 706 and the water cooling tube assembly. The end of the first protective gas tube 708 leads to a first gas chamber on the gun body 707, and the outlet of the first gas chamber faces the tungsten electrode 711. The first gas screen 709 is disposed inside the outlet of the first gas chamber. The second protective gas tube 715 is mounted on the gun body 707 and located outside the water cooling tube assembly. The second gas shield 716 is mounted on the gun body 707 and close to the tungsten electrode 711. The end of the second protective gas tube 715 leads to the second gas shield 716. The outlet of the second gas shield 716 is located above one side of the tungsten electrode 711. The second gas screen 715 is disposed inside the outlet of the second gas shield 716. The welding shielding gas is blown out through the inner wall of the first shielding gas pipe 708 and passes through the first gas screen 709 to evenly disperse the gas and fill the interior of the torch body 707. Similarly, the welding shielding gas is blown out through the inner wall of the second shielding gas pipe 717 and passes through the second gas screen 715 to evenly disperse the gas and fill the interior of the second gas shield 716, thereby ensuring the welding quality.

[0042] In this embodiment, the system also includes a third protective gas pipe 727, a third protective gas cover 729, and a third protective gas cavity 728. One third protective gas cavity 728 is slidably connected to each side of the welding torch mounting plate 701. A third protective gas cover 729 is fixedly connected to each of the two third protective gas cavities 728. The two third protective gas cavities 728 are respectively connected to the ends of the two third protective gas pipes 727. The outlet of the third protective gas cavity 728 leads into the third protective gas cover 729. A third protective gas screen 730 is provided inside the outlet of the third protective gas cavity 728. The outlet of the third protective gas cover 729 faces the tungsten electrode 711 and is located above it. The installation position can be adjusted by raising and lowering the third protective gas cavity 728. Welding protective gas is blown out through the inner wall of the third protective gas pipe 727 and evenly dispersed through the third protective gas screen 730 to fill the interior of the third protective gas cover 729, thereby increasing the amount of welding protective gas and further improving the welding quality.

[0043] In this embodiment, both ends of the arc-shaped slide rail 4 are provided with limiting baffles 5, which are used to cooperate with the guide wheel groups at both ends to limit the rotation angle of the arc-shaped slide rail 4 and prevent the arc-shaped slide rail 4 from disengaging from the guide wheel group; the gun body 707, the insulating support 725 and the water-cooling pipe outer insulating sleeve 720 are all made of high-temperature resistant insulating materials to ensure the overall insulation performance of the narrow TIG welding gun 7.

[0044] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A welding torch device for a TIG welding robot, characterized in that: Includes welding torch connection plate, arc slide rail and TIG welding torch; At least two sets of guide wheel sets are installed on the welding torch connecting plate. Each guide wheel set includes a central roller and an eccentric roller. An arc-shaped slide rail is disposed between the central roller and the eccentric roller in each set of guide wheel sets. The outer edge and inner edge of the arc-shaped slide rail are respectively connected to the V-shaped grooves on the central roller and the eccentric roller. The arc-shaped slide rail is connected to a first rotary drive device, which is used to drive the arc-shaped slide rail to rotate around its central axis. The TIG welding torch includes a torch mounting plate, a torch body, a wire feed tube, a tungsten electrode, a water-cooling tube assembly, a second rotary drive device, and a third rotary drive device. The torch mounting plate is fixedly connected to the arc-shaped slide rail. The torch body is fixed to the torch mounting plate via an insulating support. The wire feed tube is rotatably connected to the torch mounting plate and driven to rotate by the second rotary drive device. The tungsten electrode is fixedly mounted at the end of the water-cooling tube assembly. The water-cooling tube assembly is rotatably connected to the torch body and driven to rotate by the third rotary drive device. In the initial state, the tip of the tungsten electrode coincides with the rotation center of the arc-shaped slide rail.

2. The welding torch device for a TIG welding robot according to claim 1, characterized in that: The first rotary drive device includes an arc-shaped gear ring, a first motor, and a first drive gear. The arc-shaped gear ring is fixedly connected to the arc-shaped slide rail and is coaxial with the arc-shaped slide rail. The first motor is mounted on the welding torch connecting plate. The first drive gear is fixedly connected to the output shaft of the first motor and meshes with the arc-shaped gear ring.

3. The welding torch device for a TIG welding robot according to claim 1, characterized in that: The second rotary drive device includes a second motor, a second driving gear, and a second driven gear. The second motor is mounted on the welding torch mounting plate via a second motor mount. The second driving gear is fixedly connected to the output shaft of the second motor. The second driven gear is fixedly connected to the beginning of the wire feeding tube and meshes with the second driving gear. Both the second motor mount and the second driving gear are made of high-temperature resistant insulating material.

4. The welding torch device for a TIG welding robot according to claim 3, characterized in that: The wire feeding tube is respectively disposed in two wire feeding tube fixing clamps at both ends, and the wire feeding tube can rotate within the wire feeding tube fixing clamps. The wire feeding tube fixing clamps are fixedly mounted on the welding gun mounting plate. The wire feeding tube fixing clamps are made of copper and are connected to the hot wire power supply. When working, the hot wire current is transmitted to the wire feeding tube through the wire feeding tube fixing clamps to heat the welding wire. The outer wall of the wire feeding tube is provided with a high-temperature resistant coating and is covered with a high-temperature resistant fiberglass sleeve. The end of the wire feeding tube is threaded with a conductive nozzle.

5. The welding torch device for a TIG welding robot according to claim 1, characterized in that: The third rotary drive device includes a third motor, a third driving gear, and a third driven gear. The third motor is mounted on the welding torch mounting plate via a third motor mount. The third driving gear is fixedly connected to the output shaft of the third motor. The third driven gear is fixedly connected to the beginning of the water-cooled pipe assembly and meshes with the third driving gear. Both the third motor mount and the third driving gear are made of high-temperature resistant insulating material.

6. The welding torch device for a TIG welding robot according to claim 5, characterized in that: The water-cooled pipe assembly includes an inner water-cooled pipe, an outer water-cooled pipe, a water-cooled pipe end cap, and a water-cooled pipe connector. The outer water-cooled pipe is sleeved outside the inner water-cooled pipe, and an annular flow channel is formed between them. The beginning ends of both the outer and inner water-cooled pipes are sealed and fixedly connected to the water-cooled pipe connector. The water-cooled pipe connector blocks the beginning end of the annular flow channel. The end of the outer water-cooled pipe is fixedly connected to the water-cooled pipe end cap and blocked by the water-cooled pipe end cap. The beginning end of the inner water-cooled pipe is the water inlet end, and the end extends to the water-cooled pipe end cap and communicates with the end of the annular flow channel. The water-cooled pipe connector is provided with a return water connector communicating with the beginning end of the annular flow channel. The outer water-cooled pipe is installed inside the gun body with a clearance fit between them. An outer insulating sleeve is fixedly sleeved on the outer water-cooled pipe.

7. The welding torch device for a TIG welding robot according to claim 6, characterized in that: A tungsten electrode clamp is fixedly installed on the water-cooled pipe end cap by bolts. The tungsten electrode clamp is used to clamp and fix the tungsten electrode. The welding current is transmitted to the tungsten electrode through the water-cooled pipe joint, the external water-cooled pipe, the water-cooled pipe end cap, and the tungsten electrode clamp.

8. The welding torch device for a TIG welding robot according to claim 1, characterized in that: It also includes a first protective gas tube, a first gas screen, a second protective gas tube, a second gas screen, and a second gas shield. The first protective gas tube is installed on the gun body and located between the wire feed tube and the water cooling tube assembly. The end of the first protective gas tube leads to a first gas chamber on the gun body. The outlet of the first gas chamber faces the tungsten electrode. The first gas screen is disposed inside the outlet of the first gas chamber. The second protective gas tube is installed on the gun body and located outside the water cooling tube assembly. The second gas shield is installed on the gun body and close to the tungsten electrode. The end of the second protective gas tube leads to the second gas shield. The outlet of the second gas shield is located above one side of the tungsten electrode. The second gas screen is disposed inside the outlet of the second gas shield.

9. The welding torch device for a TIG welding robot according to claim 8, characterized in that: It also includes a third protective gas pipe, a third protective gas cover, and a third protective gas cavity. One of the third protective gas cavities is slidably connected to each side of the welding torch mounting plate. A third protective gas cover is fixedly connected to each of the two third protective gas cavities. The two third protective gas cavities are respectively connected to the ends of the two third protective gas pipes. The gas outlet of the third protective gas cavity opens into the third protective gas cover. A third protective gas screen is provided in the gas outlet of the third protective gas cavity. The gas outlet of the third protective gas cover faces the tungsten electrode and is located above the tungsten electrode.

10. The welding torch device for a TIG welding robot according to claim 6, characterized in that: Both ends of the arc-shaped slide rail are provided with limiting baffles, which are used to limit the rotation angle of the arc-shaped slide rail in cooperation with the guide wheel groups at both ends; the gun body, the insulating support and the outer insulating sleeve of the water cooling pipe are all made of high temperature resistant insulating material.

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