A welding gun

Abstract

The present invention relates to the technical field of welding guns, and discloses a welding gun. The welding gun comprises a welding gun body, and the welding gun further comprises a first welding head and a second welding head, one of the first welding head and the second welding head can be selectively detachably connected to the welding gun body, the welding gun body cooperates with the first welding head to implement a first welding process, and the welding gun body cooperates with the second welding head to implement a second welding process. The welding gun of the present invention can be quickly converted into the structures required by a GTAW welding gun and a GMAW welding gun to implement different welding processes.

Description

Technical Field

[0001] The invention relates to the technical field of welding guns, and in particular to a welding gun. Background Art

[0002] The existing GMAW (gas metal arc welding) welding guns and GTAW (gas tungsten arc welding) welding guns are independent modules, and the gun head accessories of the two welding guns are not interchangeable. When it is necessary to use a combination of two welding methods or switch between two welding processes, the welding gun needs to be replaced. The GMAW welding gun uses the tip of the continuously fed welding wire as the electrode to generate the arc, and the electrode is the continuously melting welding wire. The GTAW welding gun uses a high-temperature resistant tungsten electrode as the electrode to generate the arc, and the electrode is non-melting. Generally, the diameter of the GMAW welding wire is between 0.8mm and 1.6mm, and the diameter of the tungsten electrode is between 1.6mm and 5.0mm, so there is a certain difference in the demand for the space through which the middle of the welding gun passes, resulting in the need to frequently replace the welding gun during operation.

[0003] Therefore, the present invention provides a welding gun, which can solve the problem of frequent replacement of welding guns. Summary of the invention

[0004] The object of the present invention is to provide a welding gun which can be quickly converted into the structures required by a tungsten inert gas welding gun and a metallurgical gas welding gun to realize different welding processes.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A welding gun is provided, comprising a welding gun body, the welding gun further comprising a first welding head and a second welding head, one of the first welding head and the second welding head can be selectively detachably connected to the welding gun body, the welding gun body cooperates with the first welding head to implement a first welding process, and the welding gun body cooperates with the second welding head to implement a second welding process.

[0007] Preferably, the first welding head and the second welding head are connected to the welding gun body by any one of threaded connection, pin connection and clamping.

[0008] Preferably, the first welding head comprises:

[0009] An argon arc porcelain nozzle, a tungsten electrode is clamped on the welding gun body, the argon arc porcelain nozzle is sleeved on the outside of the tungsten electrode, and the tungsten electrode and the argon arc porcelain nozzle cooperate with the welding gun body to perform a tungsten inert gas shielded welding process.

[0010] Preferably, the welding gun body comprises:

[0011] The welding gun gooseneck and the conductive nozzle seat are arranged in sequence along the axial direction of the welding gun and are electrically connected, and the welding gun gooseneck and the conductive nozzle seat form a first conductive body;

[0012] A tungsten electrode clamp is arranged in the conductive nozzle holder and is electrically connected to the welding gun gooseneck and the conductive nozzle holder respectively. The tungsten electrode clamp is used to clamp the tungsten electrode.

[0013] Preferably, the welding gun body further comprises:

[0014] The insulating tube body and the argon arc porcelain nozzle are arranged in sequence along the axial direction of the welding gun. The insulating tube body and the argon arc porcelain nozzle are both sleeved on the outside of the first conductive body to insulate the first conductive body.

[0015] Preferably, the conductive tip holder is detachably connected to the welding gun gooseneck, one end of the tungsten electrode clamp is pressed against the end of the welding gun gooseneck, and the other end of the tungsten electrode clamp is pressed against the inner wall of the conductive tip holder.

[0016] Preferably, the tungsten electrode clamp is a cylindrical part, a cutting groove is provided on the outer periphery of the tungsten electrode clamp, the cutting groove is open at the front end of the tungsten electrode clamp, a chamfer is provided at the front end of the tungsten electrode clamp, a through hole is provided at the front end of the conductive tip holder, and during the process of installing the conductive tip holder on the gooseneck of the welding gun, the end of the tungsten electrode clamp extends into the through hole under the guidance of the chamfer, so that the tungsten electrode clamp clamps the tungsten electrode inside it.

[0017] Preferably, the second welding head comprises a conductive tip and a gas shielded welding gun nozzle which are sequentially sleeved from the inside to the outside, and the conductive tip and the gas shielded welding gun nozzle cooperate with the welding gun body to perform a metal metal gas shielded welding process.

[0018] Preferably, the welding gun body comprises:

[0019] A welding gun gooseneck and a conductive nozzle seat, wherein the welding gun gooseneck, the conductive nozzle seat and the conductive nozzle are sequentially arranged along the axial direction of the welding gun and are electrically connected, and the welding gun gooseneck, the conductive nozzle seat and the conductive nozzle form a second conductive body.

[0020] Preferably, the welding gun body further comprises:

[0021] The insulating tube body and the gas shielded welding torch nozzle are arranged in sequence along the axial direction of the welding torch. The insulating tube body and the gas shielded welding torch nozzle are both sleeved on the outside of the second conductive body to insulate the second conductive body.

[0022] Preferably, the welding gun body further comprises:

[0023] A gas diverter is arranged between the gas shielded welding torch nozzle and the second conductive body along the radial direction of the welding torch. A diverter hole is provided on the gas diverter. A gas channel is provided inside the welding torch body. The gas channel is connected to the diverter hole.

[0024] Preferably, the gas diverter is provided with a plurality of diverter hole groups along the axial direction of the welding gun, each of the diverter hole groups includes a plurality of diverter holes distributed along the circumferential direction, and the projections of the diverter holes in two adjacent diverter hole groups on the cross section of the gas diverter do not overlap.

[0025] Beneficial effects of the present invention: The welding gun body of the present invention can be selectively detachably connected to one of the first welding head or the second welding head. The welding gun body cooperates with the first welding head to realize the first welding process, and the welding gun body cooperates with the second welding head to realize the second welding process. When in use, since the first welding head and the second welding head can be detachably connected to the welding gun body, when two welding methods are required for combined welding or two welding processes need to be switched, there is no need to replace the welding gun body. The welding gun body is universal, and only the welding head needs to be replaced to realize the switching of the two welding processes, thereby reducing the interval time between the two welding processes, which is fast and convenient. Since the welding gun bodies of the two welding processes are universal, the production cost can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the internal structure of the welding gun body of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the tungsten inert gas shielded welding gun of the present invention;

[0028] Figure 3 It is a schematic diagram of the internal structure of the metal-electrode gas shielded welding gun of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the gas splitter of the present invention.

[0030] In the figure:

[0031] 1. welding gun body; 11. welding gun barrel; 12. welding gun gooseneck; 13. conductive tip holder; 14. tungsten electrode clamp; 141. cutting slot; 142. chamfering; 15. insulation assembly; 151. first insulation sleeve; 152. second insulation sleeve;

[0032] 2. The first welding head; 21. Argon arc porcelain nozzle;

[0033] 3. Second welding head; 31. Conductive nozzle; 32. Gas diverter; 321. Diverter hole; 33. Gas shielded welding gun nozzle. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] The existing welding guns can only meet the requirements of one welding process. The metal electrode gas shielded welding gun and the tungsten electrode inert gas shielded welding gun are both independent modules, and the gun head accessories of the two welding guns are not interchangeable. When two welding methods need to be combined for welding or two welding processes need to be switched, the welding gun needs to be replaced frequently, which is inconvenient to operate.

[0043] To solve the above problems, Figure 1 As shown, a welding gun is provided in this embodiment, which includes a welding gun body 1, and the welding gun also includes a first welding head 2 and a second welding head 3. One of the first welding head 2 and the second welding head 3 can be selectively detachably connected to the welding gun body 1, and the welding gun body 1 cooperates with the first welding head to implement a first welding process, and the welding gun body 1 cooperates with the second welding head to implement a second welding process.

[0044] When the user is working, the welding gun body 1 is universal. By selectively and quickly detachably connecting the first welding head 2 or the second welding head 3 for realizing different welding processes to the welding gun body 1, there is no need to replace the welding gun body 1, so that the welding gun can realize the free, convenient and fast switching of different welding processes, thereby reducing the connection time of the two welding processes. At the same time, since the welding gun body 1 is universal, the production cost of the welding gun can be reduced. In addition, the welding gun has diversified functions and can meet the different usage requirements of customers. In addition, since the first welding head 2 and the second welding head 3 can be selectively and detachably connected to the welding gun body 1, the operator can separate the welding gun with different welding processes into the welding gun body 1 after use, and the first welding head 2 and the second welding head 3 are stored and transported separately, so that the welding guns with different functions occupy a small storage space, are more flexible to transport, and are convenient for the operator to carry.

[0045] Specifically, the first welding head 2 and the second welding head 3 are connected to the welding gun body 1 by threaded connection. The first welding head 2 and the second welding head 3 are detachably connected to the welding gun body 1 by threaded connection, so that the welding gun can be disassembled and assembled more conveniently and quickly. At the same time, the thread is easy to process and can effectively reduce the manufacturing cost of the first welding head 2 and the second welding head 3. In other embodiments, the first welding head 2 and the third welding head 3 can also be connected to the welding gun body 1 by pins to achieve rapid fixation and disassembly and replacement of the first welding head 2 and the third welding head 3. In other embodiments, the first welding head 2 and the second welding head 3 can also be fixed by snapping together, and a snapping protrusion is set on the first welding head 2 and the second welding head 3, and a slot is set on the welding gun body 1. When in use, the first welding head 2 or the second welding head 3 can be fastened by plugging to achieve a fast fixed connection. The above methods can quickly replace the first welding head 2 and the second welding head 3, which is convenient and fast, improves work efficiency, and reduces the switching time of the two welding processes.

[0046] Figure 1 is a schematic diagram of the internal structure of the welding gun body 1, Figure 2 This is a schematic diagram of the internal structure of a tungsten inert gas shielded welding torch. Figure 1 and Figure 2 , a welding gun for performing a tungsten inert gas shielded welding process formed by installing a first welding head 2 on a welding gun body 1 is described.

[0047] like Figure 1 and Figure 2 As shown, the welding gun body 1 includes a welding gun gooseneck 12, a conductive tip holder 13 and a tungsten electrode clamp 14. The welding gun gooseneck 12 and the conductive tip holder 13 are sequentially arranged and electrically connected along the axial direction of the welding gun, the welding gun gooseneck 12 and the conductive tip holder 13 form a first conductive body, the tungsten electrode clamp 14 is arranged in the conductive tip holder 13, and the tungsten electrode clamp 14 is electrically connected to the welding gun gooseneck 12 and the conductive tip holder 13 respectively, and the tungsten electrode clamp 14 can clamp the tungsten electrode. During welding, the current is conducted through the welding gun gooseneck 12, the tungsten electrode clamp 14 and the tungsten electrode, and the arc heat generated between the tungsten electrode and the workpiece is used to melt the base material and the filler wire, thereby realizing the welding of the workpiece.

[0048] Specifically, the conductive tip holder 13 in the welding gun body 1 is detachably connected to the welding gun gooseneck 12, and the tungsten electrode clip 14 is arranged inside the conductive tip holder 13, one end of the tungsten electrode clip 14 is pressed against the welding gun gooseneck 12, and the other end of the tungsten electrode clip 14 is pressed against the inner wall of the conductive tip holder 13. When the welding gun is not in use, in order to facilitate the storage and transportation of the various structural parts of the welding gun body 1, the conductive tip holder 13, the welding gun gooseneck 12 and the tungsten electrode clip 14 can be disassembled into three parts, and the three parts are maintained and repaired separately. More specifically, in this embodiment, the conductive tip holder 13 is threadedly connected to the welding gun gooseneck 12, and it is convenient, fast and low-cost to process threads on the conductive tip holder 13 and the welding gun gooseneck 12. In addition, when the threads are worn, the conductive tip holder 13 and the welding gun gooseneck 12 can be tapped again, which facilitates the maintenance of the conductive tip holder 13 and the welding gun gooseneck 12.

[0049] Figure 2 Schematic diagram of the internal structure of a tungsten inert gas shielded welding torch. Figure 2 To explain:

[0050] like Figure 2 As shown, the first welding head 2 includes an argon arc porcelain nozzle 21, which is sleeved on the outer periphery of the welding gun body 1. The tungsten electrode can be clamped in the welding gun body 1. A gas channel is opened in the welding gun body 1. The side wall of the welding gun body 1 is opened with a gas guide hole. Inert shielding gas can be introduced into the gas channel. During welding, the shielding gas is continuously ejected from the argon arc porcelain nozzle 21 to form a gas protection layer around the arc to isolate the air, so as to prevent the air from having a harmful effect on the tungsten electrode, the molten pool and the adjacent heat-affected zone, thereby obtaining a high-quality weld. The tungsten electrode and the argon arc porcelain nozzle 21 cooperate with the welding gun body 1 to perform a tungsten electrode inert gas shielded welding process.

[0051] Specifically, the argon arc porcelain nozzle 21 is sleeved on the conductive nozzle holder 13, and the argon arc porcelain nozzle 21 is detachably connected to the conductive nozzle holder 13, and the first welding head 2 is combined with the welding gun body 1 to form a welding gun. When starting work, the tungsten electrode is clamped by the tungsten electrode clamp 14, and the tungsten electrode can extend out of the argon arc porcelain nozzle 21. Inert shielding gas can be introduced into the welding gun body 1, and the above-mentioned first conductive body and the tungsten electrode clamp 14 are energized. The arc heat generated between the tungsten electrode and the workpiece melts the base material and the filler wire. During welding, the shielding gas is continuously ejected from the argon arc porcelain nozzle 21 through the gas guide hole, and a gas protection layer is formed around the arc to isolate the air to prevent its harmful effects on the tungsten electrode, the molten pool and the adjacent heat-affected zone, so as to obtain a high-quality weld. The above-mentioned inert shielding gas is argon.

[0052] More specifically, the argon arc porcelain nozzle 21 is detachably connected to the conductive nozzle holder 13 in a specific connection manner of threaded connection, pin connection and snap connection. In this embodiment, in order to facilitate the removal of the argon arc porcelain nozzle 21 and to reduce the processing technology at the connection and reduce the processing cost of the workpiece, the argon arc porcelain nozzle 21 is threadedly connected to the welding gun body 1.

[0053] To facilitate understanding of the specific structure of the tungsten electrode clip 14, continue to refer to Figure 1 and Figure 2 , the specific structure of the above-mentioned tungsten electrode clamp 14 is described.

[0054] The tungsten electrode clamp 14 is a cylindrical part, and a cutting groove 141 is provided on the outer periphery of the tungsten electrode clamp 14. The cutting groove 141 is opened at the front end of the tungsten electrode clamp 14. A chamfer 142 is provided at the front end of the tungsten electrode clamp 14. A through hole is provided at the front end of the conductive tip holder 13. When the conductive tip holder 13 is installed on the welding gun gooseneck 12, the end of the tungsten electrode clamp 14 extends into the through hole under the guidance of the chamfer 142, so that the tungsten electrode clamp 14 clamps the tungsten electrode inside it.

[0055] Specifically, the cutting grooves 141 are evenly distributed along the circumference of the tungsten electrode clamp 14, and a chamfer 142 is provided at one end of the through hole of the conductive tip holder 13 near the tungsten electrode clamp 14. When the conductive tip holder 13 moves along the axial direction of the tungsten electrode clamp 14, the chamfer of the conductive tip holder 13 squeezes the chamfer 142 on the tungsten electrode clamp 14, and the tungsten electrode clamp 14 contracts toward the center under the action of the cutting grooves 141, thereby clamping the tungsten electrode. The clamping or releasing method of the tungsten electrode is simple and fast, and there is no need to set up a clamping mechanism to clamp the tungsten electrode. At the same time, the overall structure of the welding gun is simple, and the cost is reduced.

[0056] With respect to the gas guide hole structure on the welding gun body 1, a vent hole is provided on the side wall of the conductive nozzle seat 13, and the cutting groove 141 and the vent hole constitute the gas guide hole of the welding gun body 1. The inert gas enters the argon arc porcelain nozzle 21 from the gas channel through the cutting groove 141 and the vent hole.

[0057] Continue to refer to Figure 2 As shown, the welding gun body 1 also includes an insulating tube body, and the insulating tube body and the argon arc porcelain nozzle 21 are arranged in sequence along the axial direction. The insulating tube body and the argon arc porcelain nozzle 21 are both sleeved on the outside of the first conductive body. The insulating tube body and the argon arc porcelain nozzle 21 together completely insulate and cover the periphery of the first conductive body. When the operator uses the welding gun, the operator can avoid touching the first conductive body, thereby ensuring the personal safety of the operator.

[0058] In this embodiment, in order to further facilitate the disassembly, replacement and maintenance of the insulating tube body, and also to facilitate the processing of the insulating tube body and reduce costs, the insulating tube body is provided with multiple structural parts. Specifically, the insulating tube body includes a welding gun barrel 11 and an insulating assembly 15, wherein the welding gun barrel 11 is sleeved on the outer periphery of the welding gun gooseneck 12, the insulating assembly 15 is sleeved on the outer periphery of the conductive tip seat 13, one end of the insulating assembly 15 is pressed against the welding gun barrel 11, and the other end of the insulating assembly 15 is pressed against the argon arc porcelain nozzle 21, and the end of the argon arc porcelain nozzle 21 close to the insulating assembly 15 is connected to the conductive tip seat 13. The welding gun barrel 11 is configured to insulate part or all of the welding gun gooseneck 12, and the insulating assembly 15 is configured to insulate part of the conductive tip seat 13, and cooperates with the above-mentioned argon arc porcelain nozzle 21 to insulate the entire outer surface of the welding gun.

[0059] More specifically, the insulating assembly 15 includes a first insulating sleeve 151 and a second insulating sleeve 152. The first insulating sleeve 151 is sleeved outside the conductive tip holder 13, and one end of the first insulating sleeve 151 is pressed against the argon arc porcelain tip 21. The second insulating sleeve 152 is sleeved outside the welding gun gooseneck 12, and one end of the second insulating sleeve 152 is pressed against the welding gun barrel 11, and the other end is pressed against the first insulating sleeve 151 and the conductive tip holder 13 at the same time. The above-mentioned insulating assembly 15 includes the first insulating sleeve 151 and the second insulating sleeve 152. The insulating assembly 15 is separately arranged, which can reduce the processing difficulty and cost of parts. The first insulating sleeve 151 is configured to insulate the conductive tip holder 13, and the second insulating sleeve 152 is configured to insulate the welding gun gooseneck 12 portion between the welding gun barrel 11 and the first insulating sleeve 151.

[0060] With respect to the above-mentioned insulating tube body, in other embodiments, the insulating assembly 15 of the insulating tube body and the welding gun barrel can be integrally provided, and the insulating tube body can also be provided to insulate and isolate the welding gun gooseneck 12 and the conductive tip holder 13. With respect to the above-mentioned first insulating sleeve 151 and the second insulating sleeve 152, the integrally provided first insulating sleeve 151 and the second insulating sleeve 152 are combined with the welding gun barrel 11 to achieve insulation and isolation between the operator and the welding gun gooseneck 12 and the conductive tip holder 13.

[0061] Figure 3 This is a schematic diagram of the internal structure of a metal-electrode gas shielded welding torch. Figure 4 The structure diagram of the gas splitter 32 is shown in FIG. Figure 3 and Figure 4 A gas metal arc welding torch in which the second welding head 3 is mounted on the welding torch body 1 will be described.

[0062] Among them, the structure of the welding gun body 1 of the metal metal arc welding gun is the same as the structure of the welding gun body 1 of the tungsten inert gas welding gun, and they are common, so they will not be described in detail here.

[0063] like Figure 3As shown, the second welding head 3 includes a conductive tip 31 and a gas shielded welding gun nozzle 33 which are sequentially sleeved from inside to outside. The conductive tip 31 and the gas shielded welding gun nozzle 33 cooperate with the welding gun body 1 to perform the metal metal shielded welding process.

[0064] Specifically, in the gas metal arc welding torch, the welding gun neck 12, the conductive tip holder 13 and the conductive tip 31 are sequentially arranged and electrically connected along the axial direction of the welding gun, and the welding gun neck 12, the conductive tip holder 13 and the conductive tip 31 form a second conductive body. During welding, the welding wire sequentially passes through the welding gun neck 12, the conductive tip holder 13 and the conductive tip 31. When the second conductive body is energized, the welding wire contacts the second conductive body to generate a welding arc, and the welding wire continuously melts to provide solder for welding.

[0065] The connection relationship between the above-mentioned conductive tip 31 and the gas shielded welding gun nozzle 33 and the welding gun body 1 is: one end of the conductive tip 31 is detachably connected to the conductive tip seat 13, and the other end of the conductive tip 31 extends out of the gas shielded welding gun nozzle 33, and the gas shielded welding gun nozzle 33 is sleeved and detachably connected to the welding gun body 1.

[0066] More specifically, one end of the conductive tip 31 is provided with an external thread, the conductive tip seat 13 is provided with an internal thread, and the conductive tip 31 is threadedly connected to the conductive tip seat 13. The threaded connection between the conductive tip 31 and the conductive tip seat 13 facilitates the disassembly of the conductive tip 31 and the conductive tip seat 13, and can also reduce the processing technology at the connection between the conductive tip 31 and the conductive tip seat 13, thereby reducing the processing cost of the conductive tip 31 and the conductive tip seat 13.

[0067] In order to ensure the personal safety of the operator when using the welding gun and reduce the risk of electric shock to the operator, the welding gun body 1 in this embodiment also includes an insulating tube body, and the insulating tube body and the gas shielded welding gun nozzle 33 are arranged in sequence along the axial direction of the welding gun. The insulating tube body and the gas shielded welding gun nozzle 33 are both sleeved on the outside of the second conductive body, and the insulating tube body and the gas shielded welding gun nozzle 33 jointly insulate the outer periphery of the second conductive body.

[0068] Specifically, the gas shielded welding torch nozzle 33 is detachably connected to the insulating tube body, and is convenient for quick disassembly and replacement. At the same time, after the welding torch is used, it is also convenient to store the gas shielded welding torch nozzle 33 and the insulating tube body separately, and to perform maintenance separately. In this embodiment, the gas shielded welding torch nozzle 33 is threadedly connected to the insulating tube body, and the threaded connection is simple in structure and easy to manufacture. It can also make the connection between the gas shielded welding torch nozzle 33 and the insulating tube body tight, ensuring that the gas shielded welding torch nozzle 33 and the insulating tube body are not easy to loosen.

[0069] The specific structure of the insulating tube body has been described in the above-mentioned tungsten inert gas shielded welding gun, and the insulating tube body is a common structure in the two welding gun structures. In the metal-metal gas shielded welding gun, one end of the insulating component 15 is pressed against the welding gun barrel 11, and the other end is pressed against the gas diverter 32. The gas shielded welding gun nozzle 33 is sleeved on the insulating component 15 and is detachably connected to the welding gun barrel 11. The welding gun barrel 11 is configured to insulate the welding gun gooseneck 12, and one end of the gas shielded welding gun nozzle 33 is connected to the welding gun barrel 11. The outer surface of the welding gun can be insulated by the cooperation of the welding gun barrel 11 and the gas shielded welding gun nozzle 33. The insulating component 15 is located inside the gas shielded welding gun nozzle 33, and is insulated from the conductive tip holder 13, further ensuring the personal safety of the operator.

[0070] In other embodiments, the welding gun gooseneck 12 and the insulating assembly 15 can also be an integrated structure, which is sleeved on the welding gun gooseneck 12 and part of the conductive tip holder 13, and the gas shielded welding gun nozzle 33 is sleeved and detachably connected to the welding gun barrel. The above-mentioned integrated structure cooperates with the gas shielded welding gun nozzle 33 to achieve peripheral insulation of the welding gun.

[0071] More specifically, the connection relationship between the insulating assembly 15 and each structural member of the second welding head 3 in this embodiment is as follows: the insulating assembly 15 includes a first insulating sleeve 151 and a second insulating sleeve 152, wherein the first insulating sleeve 151 is sleeved outside the conductive nozzle seat 13, and one end of the first insulating sleeve 151 is pressed against the gas diverter 32. The second insulating sleeve 152 is sleeved outside the welding gun gooseneck 12, and one end of the second insulating sleeve 152 is pressed against the welding gun barrel 11, and the other end is pressed against the first insulating sleeve 151 and the conductive nozzle seat 13 at the same time. Specifically, the gas shielded welding gun nozzle 33 is threadedly connected to the welding gun barrel 11.

[0072] like Figure 3 and Figure 4 As shown, the welding gun body 1 also includes a gas diverter 32, which is arranged between the gas shielded welding gun nozzle and the second conductive body along the radial direction of the welding gun. A diverter hole 321 is opened on the gas diverter 32, and a gas channel is opened inside the welding gun body 1, and the gas channel is connected to the diverter hole 321.

[0073] The shielding gas enters the gas shielded welding torch nozzle 33 through the diversion hole 321 on the gas diverter 32. After the shielding gas is diverted by the gas diverter 32, the shielding gas at each location in the gas shielded welding torch nozzle 33 is substantially the same, ensuring that welding is performed in a uniform shielding gas atmosphere.

[0074] Continue to refer to Figure 3 and Figure 4As shown, the gas diverter 32 is provided with multiple groups of diverter holes along the axial direction of the welding gun, each group of diverter holes includes multiple diverter holes 321 distributed along the circumferential direction, and the diverter holes 321 in two adjacent groups of diverter holes do not overlap in their projections on the cross section of the gas diverter 32. The diverter holes 321 are arranged in the above manner, so that the shielding gas entering the gas shielded welding gun nozzle 33 can be more uniform, and the gas density in the range of the shielding gas where the welding rod is located during welding can be more uniform, further ensuring the welding effect. In this embodiment, the shielding gas is CO2 gas.

[0075] Specifically, the gas diverter 32 is sleeved on the conductive nozzle seat 13 and is detachably connected to the conductive nozzle seat 13. The gas diverter 32 is detachably connected to the conductive nozzle seat 13, can be quickly disassembled and stored, and is easy to repair and maintain. In this embodiment, the gas diverter 32 is sleeved on the conductive nozzle seat 13 and is threadedly connected to the conductive nozzle seat 13. The gas diverter 32 is threadedly connected to the conductive nozzle seat 13, and the structure of the thread is simple, easy to process and manufacture, and ensures that it is firmly connected to the conductive nozzle seat 13 and is not easy to loosen.

[0076] For easy understanding, the working principles of the tungsten inert gas welding gun and the metal arc welding gun are explained below.

[0077] 1. The working principle of the tungsten inert gas shielded welding torch is as follows:

[0078] like Figure 2 As shown in the figure, the arrow indicates the flow direction of the inert gas. After the welding gun gooseneck 12 is energized, the tungsten electrode clamp 14 is energized, and the tungsten electrode clamped by the tungsten electrode clamp 14 serves as a non-melting electrode. An arc is generated between the extended tungsten electrode end and the welding workpiece to heat the welding workpiece. At this time, an inert gas is used as a shielding gas. The inert gas enters from the gas channel and passes through the cutting groove 141 of the tungsten electrode clamp 14 and the vent holes set on the side wall of the conductive nozzle seat 13 in turn, and enters the argon arc porcelain nozzle 21. The inert gas is sprayed toward the welding area through the argon arc porcelain nozzle 21 to protect the tungsten electrode, the arc and the molten pool from atmospheric damage.

[0079] 2. The working principle of the metal arc welding torch is as follows:

[0080] After the above-mentioned tungsten inert gas shielded welding process is completed, the argon arc porcelain nozzle 21 is disassembled and replaced with a conductive nozzle 31, a gas splitter 32 and a gas shielded welding gun nozzle 33 to form a metal metal shielded welding gun.

[0081] like Figure 3As shown in the figure, the arrow in the figure indicates the flow direction of the shielding gas. When working, the welding gun gooseneck 12 is energized, and conduction is carried out through the conductive tip holder 13 and the conductive tip 31. An arc is generated between the conductive tip 31 and the welding workpiece, and the arc is used as a heat source to melt the welding wire and the parent metal. At the same time, the shielding gas enters from the gas channel, and successively passes through the cutting groove 141 of the tungsten electrode clamp 14 and the vent hole on the side wall of the conductive tip holder 13, and enters the inside of the gas shielded welding gun nozzle 33. The shielding gas is sprayed to the welding area through the gas shielded welding gun nozzle 33 to protect the melted welding wire, arc, molten pool and the parent metal of the molten pool from the damage of the atmosphere.

[0082] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A welding gun, comprising a welding gun body (1), characterized in that: The welding gun further comprises a first welding head (2) and a second welding head (3), one of the first welding head (2) and the second welding head (3) being selectively detachably connected to the welding gun body (1), the welding gun body (1) being matched with the first welding head (2), the first welding head (2) comprising an argon arc porcelain nozzle (21), a tungsten electrode being clamped on the welding gun body (1), the argon arc porcelain nozzle (21) being sleeved on the outside of the tungsten electrode, the tungsten electrode and the argon arc porcelain nozzle (21) being matched with the welding gun body (1) to perform a tungsten inert gas shielded welding process; the welding gun body (1) being matched with the second welding head (3), the second welding head (3) comprising a conductive nozzle (31) and a gas shielded welding gun nozzle (33) which are sleeved from the inside to the outside in sequence, the conductive nozzle (31) and the gas shielded welding gun nozzle (33) being matched with the welding gun body (1) to perform a metallurgical inert gas shielded welding process.

2. The welding gun according to claim 1, characterized in that The first welding head (2) and the second welding head (3) are connected to the welding gun body (1) by any one of threaded connection, pin connection and clamping.

3. The welding gun according to claim 1, characterized in that When the welding gun body (1) cooperates with the first welding head (2), the welding gun body (1) comprises: A welding gun gooseneck (12) and a conductive nozzle seat (13) are arranged in sequence along the axial direction of the welding gun and are electrically connected, and the welding gun gooseneck (12) and the conductive nozzle seat (13) form a first conductive body; A tungsten electrode clamp (14) is arranged in the conductive tip holder (13) and is electrically connected to the welding gun gooseneck (12) and the conductive tip holder (13) respectively. The tungsten electrode clamp (14) is used to clamp the tungsten electrode.

4. The welding gun according to claim 3, characterized in that The welding gun body (1) further comprises: The insulating tube body and the argon arc porcelain nozzle (21) are arranged in sequence along the axial direction of the welding gun, and the insulating tube body and the argon arc porcelain nozzle (21) are both sleeved on the outside of the first conductive body to insulate the first conductive body.

5. The welding gun according to claim 3 or 4, characterized in that: The conductive tip seat (13) is detachably connected to the welding gun gooseneck (12); one end of the tungsten electrode clamp (14) is pressed against the end of the welding gun gooseneck (12); and the other end of the tungsten electrode clamp (14) is pressed against the inner wall of the conductive tip seat (13).

6. The welding gun according to claim 3 or 4, characterized in that: The tungsten electrode clamp (14) is a cylindrical part. A cutting groove (141) is arranged on the outer periphery of the tungsten electrode clamp (14). The cutting groove (141) is arranged to be open at the front end of the tungsten electrode clamp (14). The front end of the tungsten electrode clamp (14) is provided with a chamfer (142). The front end of the conductive nozzle seat (13) is provided with a through hole. When the conductive nozzle seat (13) is installed on the welding gun gooseneck (12), the end of the tungsten electrode clamp (14) extends into the through hole under the guidance of the chamfer (142), so that the tungsten electrode clamp (14) clamps the tungsten electrode inside.

7. The welding gun according to claim 1, characterized in that When the welding gun body (1) cooperates with the second welding head (3), the welding gun body (1) comprises: A welding gun gooseneck (12) and a conductive nozzle seat (13), wherein the welding gun gooseneck (12), the conductive nozzle seat (13) and the conductive nozzle (31) are arranged in sequence along the axial direction of the welding gun and are electrically connected, and the welding gun gooseneck (12), the conductive nozzle seat (13) and the conductive nozzle (31) form a second conductive body.

8. The welding gun according to claim 7, characterized in that The welding gun body (1) further comprises: The insulating tube body and the gas shielded welding torch nozzle (33) are arranged in sequence along the axial direction of the welding torch, and the insulating tube body and the gas shielded welding torch nozzle (33) are both sleeved on the outside of the second conductive body to insulate the second conductive body.

9. The welding gun according to claim 8, characterized in that The welding gun body (1) further comprises: A gas diverter (32) is arranged between the gas shielded welding torch nozzle (33) and the second conductive body along the radial direction of the welding torch, a diverter hole (321) is provided on the gas diverter (32), a gas channel is provided inside the welding torch body (1), and the gas channel is connected to the diverter hole (321).

10. The welding gun according to claim 9, characterized in that The gas diverter (32) is provided with a plurality of diverter hole groups along the axial direction of the welding gun, each of the diverter hole groups comprising a plurality of diverter holes (321) distributed along the circumferential direction, and the projections of the diverter holes (321) in two adjacent diverter hole groups on the cross section of the gas diverter (32) do not overlap.

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