A magnetic control TIG welding gun

Abstract

The application discloses a magnetic control TIG welding gun, which is characterized by small volume and light mass by integrating a coil inside the overall structure of the welding gun, and solves the problems of large volume and heavy mass of a magnetic head of a magnetic field assisted TIG welding gun, and the difficulty in realizing engineering application, and is extremely beneficial to the application of the magnetic control TIG welding in practical engineering. The magnetic control TIG welding gun has the advantages that through the joint action of a magnetic type TIG welding gun and a magnetic type welding electrode, the loss in the transmission process of the magnetic induction intensity to the welding arc area and the molten pool is reduced, the magnetic field intensity is enhanced, the compression effect of the magnetic control TIG arc is improved, the stiffness and rigidity of the arc are improved, and then the TIG welding efficiency and the welding quality are improved.

Description

Technical Field

[0001] This invention belongs to the field of welding technology and relates to a TIG welding torch, particularly a magnetically controlled TIG welding torch. Background Technology

[0002] Tungsten inert gas arc welding (TIG), also known as non-consumable electrode inert gas welding, is an arc welding method that uses pure tungsten or activated tungsten (such as cerium tungsten, thorium tungsten, etc.) as electrodes and inert gas (such as argon, helium, etc.) as shielding gas. TIG welding has advantages such as stable welding process, aesthetically pleasing welds, good weld quality, and high reliability, and is therefore widely used in machinery manufacturing, petrochemical, aerospace, and other fields. However, due to the limited current carrying capacity of the tungsten electrode and the tendency of the arc to disperse, the power density of TIG welding is limited, resulting in insufficient welding speed, reduced production efficiency, and shallow weld penetration. Welding without beveling is only suitable for workpieces with a thickness of less than 3mm. Using multi-layer, multi-pass welding with beveling and filler wire increases material consumption, reduces production efficiency, and affects weld quality.

[0003] Magnetic controlled TIG (Technical Induction Gauge) boasts advantages such as low cost and high efficiency, making it a promising technology with widespread application prospects and leading to its extensive research and application in recent years. Magnetic controlled TIG introduces a magnetic field into the welding zone through an excitation device (excitation power supply, magnetic head, etc.). This not only compresses the arc, increases arc density, and expands weld penetration, but also controls the flow of the molten pool, refining the weld microstructure and ultimately improving efficiency, weld formation, and welding quality. However, current magnetic controlled TIG heads are mostly mounted on or outside the welding torch, using helical tube heads or permanent magnets to generate the magnetic field. The disadvantages are that the heads are large and heavy, resulting in a complex overall structure that is unsuitable for engineering applications. Furthermore, traditional magnetic heads generate limited magnetic induction intensity within the welding zone, resulting in a dispersed external magnetic field with relatively weak magnetic field strength acting on the welding arc and molten pool, failing to fully utilize the advantages of the magnetic field. Summary of the Invention

[0004] The purpose of this invention is to provide a novel magnetically controlled TIG welding torch to solve the problems of poor magnetic field effect of the magnetic head on the welding zone and limited engineering applications in traditional welding torches.

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

[0006] This invention provides a magnetically controlled TIG welding torch, comprising:

[0007] The gun body has a coil wound around its outer wall and a gas supply pipe for supplying protective gas inside the gun body. A tungsten electrode clamp containing a tungsten electrode is provided at the front end of the gas supply pipe. The outer wall of the tungsten electrode clamp is sealed and fitted to the gas supply pipe, and the inside of the gas supply pipe is connected to the inside of the tungsten electrode clamp.

[0008] An insulating shell is fitted over the coil of the gun body, and a nozzle is provided at the front end of the insulating shell.

[0009] Optionally, the gun body includes an outer tube assembly and an inner tube assembly sleeved inside the outer tube assembly, wherein:

[0010] The inner tube assembly includes a gun body inner tube and a gas supply pipe. The gas supply pipe is installed inside the gun body inner tube. The gas supply pipe's inlet end is used to connect to an external welding protective gas source. The gas supply pipe's outlet end is connected to the side wall of the gun body inner tube and communicates with the gas supply pipe.

[0011] The outer tube assembly includes an outer tube for the gun body, a water-cooled inlet tube, and a water-cooled outlet tube. The outer tube is fitted over the outer part of the inner tube, forming an annular cooling jacket with both ends closed. A spacer is provided within the annular cooling jacket to separate an inlet communication chamber and an outlet communication chamber that are interconnected at their front ends. The water-cooled inlet tube is connected to the side wall of the outer tube and communicates with the inlet communication chamber. The water-cooled outlet tube is connected to the side wall of the outer tube and communicates with the outlet communication chamber.

[0012] Optionally, the air inlet end of the air supply pipe is welded with a venting boss bolt for connecting to an external air pipe; the air outlet end of the air supply pipe is welded to the rear end side wall of the gun body tube.

[0013] Optionally, the inlet end of the water-cooled inlet pipe and the outlet end of the water-cooled outlet pipe are both welded with water-passing boss bolts for connecting to external water pipes; the outlet end of the water-cooled inlet pipe and the inlet end of the water-cooled outlet pipe are both welded to the rear end side wall of the gun body tube.

[0014] Optionally, the spacer is a round copper wire, which is arranged along the axial direction of the gun body tube. One side of the outer circle of the round copper wire is sealed and fitted with the inner wall of the gun body tube. The outer wall of the gun body tube is provided with an arc groove along its axial direction, and the other side of the outer circle of the round copper wire is sealed and fitted with the groove wall of the arc groove.

[0015] Two round copper wires are symmetrically arranged inside the annular cooling jacket to divide the annular cooling jacket into the water inlet cavity and the water outlet cavity.

[0016] Optionally, the spacer is a protrusion arranged along the axial direction of the gun body tube, with one side of the protrusion sealingly fitted to the inner wall of the gun body tube and the other side sealingly fitted to the outer wall of the gun body tube.

[0017] The protrusion is integrally formed on the outer wall of the gun body tube or the inner wall of the gun body tube. Two protrusions are symmetrically arranged in the annular cooling jacket to divide the annular cooling jacket into the water inlet communication cavity and the water outlet communication cavity.

[0018] Optionally, the outer tube assembly further includes a coil fixing device, which is sleeved on the rear end of the gun outer tube. One end of the coil is connected to one side of the coil fixing device, and the other end is wound along the gun outer tube and connected to the other side of the coil fixing device.

[0019] Optionally, a conductive connector is provided at the rear end of the gun body tube, and a tightening rod is internally threaded onto the conductive connector. The tightening rod is used to tighten the tungsten electrode clamp.

[0020] Optionally, the inner wall of the insulating shell is sealed to the outer wall of the coil and the gun body.

[0021] Optionally, the outer tube of the gun, the inner tube of the gun, the tungsten electrode clamp, the coil fixing device, the coil, the tightening rod, and the conductive connector are all made of copper.

[0022] The present invention achieves the following technical effects compared to the prior art:

[0023] The magnetically controlled TIG welding torch proposed in this invention integrates the coil inside the overall structure of the torch, resulting in a compact size and lighter weight. This solves the problem of the large size and heavy weight of the magnetic head in magnetically assisted TIG welding torches, which makes them difficult to implement in engineering applications. This greatly facilitates the application of magnetically controlled TIG welding in practical engineering.

[0024] The magnetically controlled TIG welding torch proposed in this invention is suitable for various types of magnetically controlled TIG welding, especially for longitudinal magnetic fields. Its advantages lie in the fact that through the combined action of the magnetically focused TIG welding torch and the magnetically focused welding electrode, the loss of magnetic induction intensity during the transmission process to the welding arc zone and the molten pool is reduced, the magnetic field strength is enhanced, the compression effect of the magnetically controlled TIG arc is improved, and the stiffness and rigidity of the arc are increased, thereby improving TIG welding efficiency and welding quality. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the overall structure of the magnetically controlled TIG welding torch disclosed in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the outer tube assembly in the magnetically controlled TIG welding torch disclosed in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the inner tube assembly in the magnetically controlled TIG welding torch disclosed in an embodiment of the present invention.

[0029] Figure 4 for Figure 3 AA-direction cross-section;

[0030] Figure 5-1 When the spacer is a round copper wire Figure 3 BB direction cross section;

[0031] Figure 5-2 When the spacer is a protrusion Figure 3 BB direction cross section;

[0032] Figure 6 This is a schematic diagram of the tungsten electrode clip in the magnetically controlled TIG welding torch disclosed in the embodiments of the present invention;

[0033] Figure 7 This is a schematic diagram of the connection points of various parts in the magnetically controlled TIG welding torch disclosed in the embodiments of the present invention, as well as the specific connection process requirements.

[0034] The attached figures are labeled as follows:

[0035] Outer tube assembly 1, gun body tube 11, water-cooled inlet pipe 12, water-cooled outlet pipe 13, water-passing boss bolt 14, inner tube assembly 2, gun body tube 21, air supply pipe 22, air-passing boss bolt 23, tungsten electrode clip 3, coil fixing device 4, coil 5, tightening rod 6, insulating shell 7, nozzle 8, round copper wire 9, bump 10. Detailed Implementation

[0036] 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.

[0037] One of the objectives of this invention is to provide a novel magnetically controlled TIG welding torch that solves the problems of poor magnetic field effect of the magnetic head on the welding zone and limited engineering applications in traditional welding torches.

[0038] 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.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides a magnetically controlled TIG welding torch, including a torch body and an insulating shell 7. A coil 5 is wound around the outer wall of the torch body, and a gas supply pipe for delivering shielding gas is provided inside the torch body. A tungsten electrode clamp 3 containing a tungsten electrode is provided at the front end of the gas supply pipe. The outer wall of the tungsten electrode clamp 3 is sealed and fitted to the gas supply pipe. The interior of the gas supply pipe is connected to the interior of the tungsten electrode clamp 3 to ensure that the shielding gas is smoothly delivered into the welding protection area. The insulating shell 7 is sleeved on the outside of the coil 5 of the torch body, and a nozzle 8 is provided at the front end of the insulating shell 7.

[0041] In this embodiment, the gun body includes an outer tube assembly 1 and an inner tube assembly 2 fitted inside the outer tube assembly 1. The inner tube assembly 2 includes an inner tube 21 and an air supply pipe 22. An air supply pipe is provided inside the inner tube 21. The air inlet end of the air supply pipe 22 is used to connect to an external welding protective gas source. The air outlet end of the air supply pipe 22 is connected to the side wall of the inner tube 21 and communicates with the air supply pipe. The outer tube assembly 1 includes an outer tube 11, a water-cooled inlet pipe 12, and a water-cooled outlet pipe 13. The outer tube 11 is fitted outside the inner tube 21 and forms an annular cooling jacket with closed ends between the outer tube 11 and the inner tube 21. A spacer is provided in the annular cooling jacket to separate an inlet communication chamber and an outlet communication chamber that are interconnected at their front ends. The water-cooled inlet pipe 12 is connected to the side wall of the outer tube 11 and communicates with the inlet communication chamber. The water-cooled outlet pipe 13 is connected to the side wall of the outer tube 11 and communicates with the outlet communication chamber.

[0042] In this embodiment, the inlet end of the gas supply pipe 22 is welded with a vent bolt 23 for connecting to an external gas pipe; the outlet end of the gas supply pipe 22 is welded to the rear end side wall of the inner tube 21 of the welding torch. The gas supply pipe 22, together with the inner tube 21 of the welding torch and the interior of the tungsten electrode clip 3, constitute the welding torch shielding gas system. A stable shielding gas can ensure the stable combustion of the welding arc and isolate air. The shielding gas is generally an inert gas, such as argon or helium. As a preferred embodiment, the gas supply pipe 22 is connected to the rear end of the inner tube 21 of the welding torch by welding, with full welding along the circumference of the tube. The weld pressure resistance is required to be greater than 0.4 MPa to ensure that the shielding gas in the shielding gas system does not leak out. Similarly, the vent bolt 23 is connected to the other end of the gas supply pipe 22 by welding, with full welding along the circumference of the tube. The weld pressure resistance is required to be greater than 0.4 MPa, with good airtightness to ensure that the shielding gas in the shielding gas system does not leak out.

[0043] In this embodiment, both the inlet end of the water-cooled inlet pipe 12 and the outlet end of the water-cooled outlet pipe 13 are welded with water-passing boss bolts 14 for connecting to external water pipes; both the outlet end of the water-cooled inlet pipe 12 and the inlet end of the water-cooled outlet pipe 13 are welded to the rear end side wall of the gun body tube 11. As a preferred embodiment, both the outlet end of the water-cooled inlet pipe 12 and the inlet end of the water-cooled outlet pipe 13 are connected to the rear end of the gun body tube 11 by welding, with full welding along the circumference of the tube. The weld is required to withstand a pressure greater than 0.4 MPa and have good airtightness to ensure that the cooling water in the water-cooling system does not leak out. Similarly, the two water-passing boss bolts 14 are respectively connected to the other end of the water-cooled inlet pipe 12 and the water-cooled outlet pipe 13 by welding, with full welding along the circumference of the tube. The weld is required to withstand a pressure greater than 0.4 MPa and have good airtightness to ensure that the cooling water in the water-cooling system does not leak out.

[0044] In this embodiment, the spacer is a round copper wire 9, which is arranged along the axial direction of the gun body tube 11. One side of the outer circle of the round copper wire 9 is sealed and fitted with the inner wall of the gun body tube 11. The outer wall of the gun body tube 21 is provided with an arc groove along its axial direction, and the other side of the outer circle of the round copper wire 9 is sealed and fitted with the groove wall of the arc groove. Two round copper wires 9 are symmetrically arranged in the annular cooling jacket to divide the annular cooling jacket into an inlet connecting cavity and an outlet connecting cavity. The aforementioned arc-shaped grooves are shallowly pressed into the outer wall of the inner tube 21 of the welding torch. Two shallowly pressed grooves are symmetrically distributed relative to the axis of the inner tube. The diameter of the round copper wire 9 is preferably 1.6 mm. The front ends of the outer tube 11 and the inner tube 21 are welded and sealed. When the round copper wire 9 is arranged, a certain gap is left between the front end and the weld seam between the outer tube 11 and the inner tube 21, so that a closed annular water groove is formed at the very front end between the outer tube 11 and the inner tube 21. The aforementioned water inlet and outlet connecting chambers are connected through this closed annular water groove. Based on this, the water-cooled inlet pipe, the water inlet connecting chamber, the aforementioned closed annular water groove, the water outlet connecting chamber, and the water-cooled outlet pipe are sequentially connected to form a welding torch water-cooling system. The flow of cooling water carries away the heat transferred from the welding area and the heat generated by the coil energization, ensuring the welding torch operates stably and continuously. The water-cooled inlet pipe also serves as a conductive device connected to an external power source.

[0045] In this embodiment, the spacer can also be a protrusion 10 arranged axially along the outer tube 11 of the gun body. One side of the protrusion 10 is sealed to the inner wall of the outer tube 11, and the other side is sealed to the outer wall of the inner tube 21. The protrusion 10 is integrally formed on the outer wall of the inner tube 21 or the inner wall of the outer tube 11. Two protrusions 10 are symmetrically arranged in the annular cooling jacket to divide the annular cooling jacket into an inlet connecting cavity and an outlet connecting cavity. As a preferred embodiment, two protrusions 10 can be machined on the inner tube 21 at one time. The two protrusions 10 are symmetrically distributed relative to the axis of the inner tube. The front ends of the outer tube 11 and the inner tube 21 are welded and sealed. A certain gap is left between the front end of the protrusion 10 and the weld between the outer tube 11 and the inner tube 21, so that there is a closed annular water groove at the front end between the outer tube 11 and the inner tube 21. The aforementioned inlet connecting cavity and outlet connecting cavity are connected through the closed annular water groove. Based on this, the water-cooled inlet pipe, the inlet connecting cavity, the aforementioned closed annular water tank, the outlet connecting cavity, and the water-cooled outlet pipe are sequentially connected to form a welding torch water-cooling system. The flow of cooling water carries away the heat transferred from the welding area and the heat generated by the coil being energized, ensuring the welding torch operates stably and continuously. The water-cooled inlet pipe also serves as a conductive device connected to an external power source.

[0046] In this embodiment, the front ends of the gun outer tube 11 and the gun inner tube 21 are pressed together and connected by welding. The welding is performed along the circumference of the tube, and the weld is required to withstand a pressure greater than 0.4 MPa and have good airtightness to ensure that the cooling water in the water cooling system will not leak out.

[0047] In this embodiment, the outer tube assembly 1 further includes a coil fixing device 4, which is sleeved on the rear end of the gun outer tube 11. One end of the coil 5 is connected to one side of the coil fixing device 4, and the other end of the coil 5 is fixedly wound in one direction on the gun outer tube 11 and then connected to the other side of the coil fixing device 4. When the coil 5 is energized, it can generate the required external magnetic field. The number of coil turns depends on the specific situation. The coil fixing device 4 has internal threads for winding and fixing the coil.

[0048] In this embodiment, a conductive connector is provided at the rear end of the gun body tube 21. The conductive connector is used to conduct electricity to the coil and tungsten electrode during welding. A tightening rod 6 is internally threaded onto the conductive connector (both the conductive connector and the tightening rod 6 are conductive metal parts, so they are also electrically connected). The body of the tightening rod 6 is inserted into the gun body tube 21 to tighten the tungsten electrode clamp 3, and the outer wall of the tightening rod 6 is sealed and fitted to the inner wall of the gun body tube 21. The tungsten electrode clamped in the tungsten electrode holder 3 is preferably a magnetic welding electrode. It is inserted from the rear end of the tungsten electrode holder 3 and adjusted to a suitable length to ensure the welding torch can work normally. The tungsten electrode holder 3 with the tungsten electrode and the tightening rod 6 are sequentially inserted into the inner tube 21 of the torch body. The outer wall of the tightening rod 6 is sealed to the inner wall of the inner tube 21. The tightening rod 6 is threaded to the conductive connector at the rear end of the outer tube 1 of the torch body. After tightening, the tungsten electrode (magnetic welding electrode) is stably placed in the groove of the rear tightening rod 6, and the front end of the tungsten electrode holder 3 is pressed against the front end of the inner tube 21 of the torch body. According to the principle of electromagnetic induction, the coil 5 generates a magnetic field after being energized. Therefore, there will also be a magnetic field distribution around the welding torch. Part of the generated magnetic field acts directly on the welding arc area through the air medium, and part of it magnetizes the tungsten electrode (magnetic welding electrode) inside the welding torch. After magnetization, the magnetic field is emitted from inside the welding torch to the welding arc area, which plays a magnetic focusing effect and enhances the effect of the magnetic field on the welding arc area and the molten pool.

[0049] In this embodiment, as a preferred option, the conductive connector is integrally formed with the gun body tube 21.

[0050] In this embodiment, after the outer tube assembly 1, inner tube assembly 2, coil fixing device 4, and coil 5 are assembled, the insulating shell 7 of the welding torch is fitted over the assembled torch body to enclose the coil 5 inside the insulating shell 7. The inner wall of the insulating shell 7 is sealed tightly against the coil 5 and the outer wall of the outer tube 11 of the torch body. The front end of the insulating shell 7 is threaded and connected to the nozzle 8 by screwing.

[0051] In this embodiment, the insulating shell 7 is preferably made of a lightweight insulating material, such as PVC, which has the advantages of reducing the weight of the welding torch and preventing electric shock. The nozzle 8 is preferably made of a heat-resistant material, such as alumina ceramic, which has a much lower thermal conductivity than carbon steel.

[0052] In this embodiment, the gun outer tube 11, the gun inner tube 21, the tungsten electrode clip 3, the coil fixing device 4, the coil 5, the tightening rod 6, and the conductive connector are all made of copper. Based on this, the welding between the connected components, such as the welding between the gun outer tube 11 and the gun inner tube 21, is copper welding.

[0053] The working principle of the aforementioned magnetically controlled TIG welding torch is explained in detail below:

[0054] During welding, the water-conducting boss bolt 14 is connected to the water cable of the external power supply (internal water supply and external power supply) via threads. Cooling water enters from the water-cooled inlet pipe 12 and flows sequentially through the inlet connecting cavity, the closed annular water tank, and the outlet connecting cavity, finally flowing out through the water-cooled outlet pipe 13. This process can cool the nozzle 8, coil 5, and gun outer tube 11, allowing welding to proceed normally. In addition, the water-cooled inlet pipe 12 also serves as a conductor. Current starts from the positive terminal of the power supply, flows through the water cable through the water-cooled inlet pipe 12 and the gun outer tube 11. The current through the gun outer tube 11 flows from the conductive connector at the rear end to the tightening rod 6 and the tungsten electrode clamp 3, and is transmitted to the tungsten electrode to discharge to the workpiece. Then the current returns to the negative terminal of the power supply. On the other hand, the current through the gun outer tube 11 flows to the coil fixing device 4, and finally the current flows through the coil 5, generating an induced auxiliary magnetic field, which ultimately enters the welding area. During the welding process, the venting boss bolt 23 is connected to the external gas pipe through a thread. The protective gas enters from the venting boss bolt 23, flows through the gun body tube 21 and the tungsten electrode clip 3, and is finally ejected from the nozzle 8 to provide gas protection for the welding work area.

[0055] In summary, the magnetically controlled TIG welding torch proposed in this technical solution is essentially a magnetically focused TIG welding torch, comprising an outer tube assembly, an inner tube assembly, a tungsten electrode clamp, a coil fixing device, a coil, a tightening rod, an insulating shell, and a nozzle. The outer tube assembly is fitted onto the inner tube assembly, forming an inlet and outlet water communication cavity between them; the tungsten electrode clamp is located inside the inner tube assembly; the coil fixing device is located on the outer tube assembly; the coil is fixedly wound around the outer tube assembly via the coil fixing device; the welding torch insulating shell is located outside the welding torch body; the tightening rod is located inside the inner tube assembly; and the nozzle is located at the front end of the outer tube assembly. By integrating the coil within the overall structure of the welding torch, it features light weight and small size, solving the problem of large size and heavy weight of the magnetic head in magnetically assisted TIG welding torches, which makes them difficult to implement in engineering applications. Furthermore, this technical solution, combined with a magnetically focused welding electrode, can greatly enhance the magnetic field control effect.

[0056] The magnetically controlled TIG welding torch proposed in this technical solution is suitable for various types of magnetically controlled TIG welding. Its advantages lie in reducing the loss of magnetic induction intensity during the transmission process to the welding arc zone and molten pool through the combined action of the magnetically focused TIG welding torch and the magnetically focused welding electrode, thereby enhancing the magnetic field strength, improving the compression effect of the magnetically controlled TIG arc, increasing the stiffness and rigidity of the arc, and thus improving the TIG welding efficiency and welding quality.

[0057] In magnetically controlled TIG welding, a solenoid-type magnetic head is typically used to introduce the magnetic field. A significant drawback of this method is its large size and heavy weight, making it unsuitable for engineering applications. This technical solution integrates the coil into the welding torch, resulting in a compact and lighter design, almost identical in size to a traditional TIG welding torch. It eliminates the need for complex assembly processes, greatly facilitating the practical application of magnetically controlled TIG welding in engineering projects.

[0058] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, all changes falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] 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 magnetically controlled TIG welding torch, characterized in that, include: The gun body has a coil wound around its outer wall. An internal gas supply pipe for delivering protective gas is provided within the gun body. A tungsten electrode clamp containing a tungsten electrode is located at the front end of the gas supply pipe. The outer wall of the tungsten electrode clamp is sealed to the gas supply pipe, and the interior of the gas supply pipe communicates with the interior of the tungsten electrode clamp. The gun body includes an outer tube assembly and an inner tube assembly fitted inside the outer tube assembly. The inner tube assembly includes an inner tube and a gas supply pipe. The gas supply pipe is located inside the inner tube. The inlet end of the gas supply pipe is used to connect to an external welding protective gas source, and the outlet end of the gas supply pipe is connected to the side wall of the inner tube and communicates with the gas supply pipe. The outer tube assembly includes an outer tube, a water-cooling inlet pipe, and a water-cooling outlet pipe. The outer tube is fitted outside the inner tube, forming a closed-end annular cooling jacket. A spacer, made of round copper wire, is provided within the annular cooling jacket. The round copper wire is arranged along the axial direction of the outer tube. The outer circumference of the round copper wire is sealed to the inner wall of the gun body tube. An arc groove is formed along the axial direction of the outer wall of the gun body tube, and the other side of the outer circumference of the round copper wire is sealed to the groove wall. Two round copper wires are symmetrically arranged within the annular cooling jacket to divide the annular cooling jacket into an inlet connecting chamber and an outlet connecting chamber that are interconnected at their front ends. The water-cooled inlet pipe is connected to the side wall of the gun body tube and communicates with the inlet connecting chamber. The water-cooled outlet pipe is connected to the side wall of the outer tube of the gun body and communicates with the water outlet cavity; the air inlet end of the air supply pipe is welded with a venting boss bolt for connecting to an external air pipe; the air outlet end of the air supply pipe is welded to the rear end side wall of the inner tube of the gun body; the water inlet end of the water-cooled inlet pipe and the water outlet end of the water-cooled outlet pipe are both welded with a water-passing boss bolt for connecting to an external water pipe; the water outlet end of the water-cooled inlet pipe and the water inlet end of the water-cooled outlet pipe are both welded to the rear end side wall of the outer tube of the gun body. An insulating shell is fitted over the coil of the gun body, and a nozzle is provided at the front end of the insulating shell.

2. The magnetically controlled TIG welding torch according to claim 1, characterized in that, The spacer is a protrusion arranged along the axial direction of the gun body tube. One side of the protrusion is sealed to the inner wall of the gun body tube, and the other side is sealed to the outer wall of the gun body tube. The protrusion is integrally formed on the outer wall of the gun body tube or the inner wall of the gun body tube. Two protrusions are symmetrically arranged in the annular cooling jacket to divide the annular cooling jacket into the water inlet communication cavity and the water outlet communication cavity.

3. The magnetically controlled TIG welding torch according to claim 1, characterized in that, The outer tube assembly also includes a coil fixing device, which is sleeved on the rear end of the gun outer tube. One end of the coil is connected to one side of the coil fixing device, and the other end is wound along the gun outer tube and connected to the other side of the coil fixing device.

4. The magnetically controlled TIG welding torch according to claim 3, characterized in that, A conductive connector is provided at the rear end of the gun body tube, and a tightening rod is internally threaded onto the conductive connector. The tightening rod is used to tighten the tungsten electrode clamp.

5. The magnetically controlled TIG welding torch according to claim 1, characterized in that, The inner wall of the insulating shell is sealed and fitted to the outer wall of the coil and the gun body.

6. The magnetically controlled TIG welding torch according to claim 4, characterized in that, The gun outer tube, the gun inner tube, the tungsten electrode clamp, the coil fixing device, the coil, the tightening rod, and the conductive connector are all made of copper.

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