CN110773851A

CN110773851A - Welding gun

Info

Publication number: CN110773851A
Application number: CN201911225625.7A
Authority: CN
Inventors: 冯消冰; 潘际銮; 高力生; 汪正伟
Original assignee: Beijing Bo Qing Technology Co Ltd
Current assignee: Beijing Bo Qing Technology Co Ltd; Beijing Bo Tsing Technology Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-02-11

Abstract

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

Description

Welding gun

Technical Field

The invention relates to the technical field of welding guns, in particular to a welding gun.

Background

The existing GMAW (gas metal arc welding) welding gun and GTAW (gas tungsten inert gas welding) welding gun are independent modules, gun head fittings of the two welding guns cannot be used universally, and when two welding methods are needed to be used for combined welding or two welding processes are needed to be switched, the welding guns need to be replaced. GMAW welding guns use a continuously advancing wire tip as the arc generating electrode, which is a continuously melting wire. The GTAW torch uses a high temperature tungsten electrode as an electrode for generating an arc, and the electrode is not melted. The diameter of a welding wire of a general GMAW is between 0.8mm and 1.6mm, and the diameter of a tungsten electrode is between 1.6mm and 5.0mm, so that the requirement for the middle passing space of a welding gun is different to a certain extent, and the welding gun needs to be frequently replaced during operation.

Therefore, the invention provides a welding gun, which can solve the problem that the welding gun needs to be replaced frequently.

Disclosure of Invention

The invention aims to provide a welding gun which can be quickly converted into structures required by a tungsten inert gas shielded welding gun and a consumable electrode gas shielded welding gun so as to realize different welding processes.

In order to achieve the purpose, the invention adopts the following technical scheme:

the welding gun comprises a welding gun body, and further comprises a first welding head and a second welding head, wherein one of the first welding head and the second welding head can be selectively and detachably connected with the welding gun body, the welding gun body is matched with the first welding head to realize a first welding process, and the welding gun body is matched with the second welding head to realize a second welding process.

Preferably, the first welding head and the second welding head are connected to the welding gun body by any one of screwing, bolting, and clamping.

Preferably, the first welding head comprises:

argon arc porcelain mouth, the welder body facial make-up accompanies the tungsten pole, argon arc porcelain mouth cover is established the outside of tungsten pole, the tungsten pole with argon arc porcelain mouth with the welder body cooperatees in order to carry out tungsten pole inert gas shielded arc welding process.

Preferably, the welding gun body includes:

the welding gun gooseneck and the conductive nozzle seat are sequentially arranged 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;

and the tungsten electrode clamp is arranged in the conductive nozzle seat and is respectively electrically connected with the welding gun gooseneck and the nozzle seat, and the tungsten electrode clamp is used for clamping the tungsten electrode.

Preferably, the welding gun body further includes:

the insulating tube body, with argon arc porcelain mouth follows welder's axis direction arranges in proper order, the insulating tube body with argon arc porcelain mouth all overlaps and establishes the outside of first conductive body, so that first conductive body is insulating.

Preferably, the conductive nozzle seat is detachably connected with the welding gun gooseneck, one end of the tungsten electrode clamp is pressed against the end part of the welding gun gooseneck, and the other end of the tungsten electrode clamp is pressed against the inner wall of the conductive nozzle seat.

Preferably, the tungsten electrode clamp is a cylindrical part, a cutting through groove is formed in the periphery of the tungsten electrode clamp, the cutting through groove is formed in the front end of the tungsten electrode clamp in an opening mode, a chamfer is formed in the front end of the tungsten electrode clamp, a through hole is formed in the front end of the conductive nozzle seat, and in the process that the conductive nozzle seat is installed on the gooseneck of the welding gun, the end portion of the tungsten electrode clamp extends into the through hole under the guiding of the chamfer, so that the tungsten electrode in the tungsten electrode clamp is clamped tightly by the tungsten electrode clamp.

Preferably, the second welding head comprises a conductive nozzle and a gas shielded welding torch nozzle which are sequentially sleeved from inside to outside, and the conductive nozzle and the gas shielded welding torch nozzle are matched with the welding torch body to perform a gas metal arc welding process.

Preferably, the welding gun body includes:

the welding gun comprises 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 axis 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.

Preferably, the welding gun body further includes:

the insulating tube body and the gas shielded welding torch nozzle are sequentially arranged along the axis direction of the welding torch, and are sleeved outside the second conductive body so as to insulate the second conductive body.

Preferably, the welding gun body further includes:

the gas splitter is arranged between the gas shielded welding gun nozzle and the second conductive body along the radial direction of the welding gun, a splitter hole is formed in the gas splitter, a gas channel is formed in the welding gun body, and the gas channel is communicated with the splitter hole.

Preferably, a plurality of groups of branch hole groups are arranged on the gas splitter along the axial direction of the welding gun, each group of branch hole groups comprises a plurality of branch holes distributed along the circumferential direction, and the projections of the branch holes in two adjacent groups of branch hole groups on the cross section of the gas splitter are not coincident.

The invention has the beneficial effects that: the welding gun body can be selectively detachably connected with one of the first welding head or the second welding head, the welding gun body is matched with the first welding head to realize the first welding process, and the welding gun body is matched with the second welding head to realize the second welding process. The welding gun bodies of the two welding processes are universal, so that the production cost can be reduced.

Drawings

FIG. 1 is a schematic view of the internal structure of the torch body of the present invention;

FIG. 2 is a schematic view of the internal structure of the TIG welding torch of the present invention;

FIG. 3 is a schematic view of the internal structure of the gas metal arc welding torch of the present invention;

FIG. 4 is a schematic diagram of the gas splitter of the present invention.

In the figure:

1. a welding gun body; 11. a gun barrel of a welding gun; 12. welding a gooseneck; 13. a conductive nozzle base; 14. a tungsten electrode clamp; 141. cutting a through groove; 142. chamfering; 15. an insulating assembly; 151. a first insulating sleeve; 152. a second insulating sleeve;

2. a first welding head; 21. argon arc ceramic nozzle;

3. a second welding head; 31. a conductive nozzle; 32. a gas splitter; 321. a shunt hole; 33. a gas shielded arc welding torch nozzle.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The existing welding gun can only adapt to the requirement of one welding process, the consumable electrode gas shielded welding gun and the tungsten electrode inert gas shielded welding gun are independent modules, gun head accessories of the two welding guns cannot be used universally, when the two welding methods are required to be used for combined welding or the two welding processes are required to be switched, the welding guns need to be replaced frequently, and the operation is inconvenient.

In order to solve the above problem, as shown in fig. 1, the present embodiment provides a welding gun, which includes a welding gun body 1, and the welding gun further 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, the welding gun body 1 and the first welding head cooperate to implement a first welding process, and the welding gun body 1 and the second welding head cooperate to implement a second welding process.

The user is at the during operation, and welder body 1 is general, through first soldered connection 2 or the second soldered connection 3 that will realize different welding processes selectively can dismantle the connection with welder body 1 fast, need not to change welder body 1 to make welder realize different welding processes's freedom convenient, switch over fast, reduce two kinds of welding process's joining time. Meanwhile, the welding gun body 1 is universal, so that the production cost of the welding gun can be reduced. In addition, the welding gun has diversified functions and can meet different use requirements of customers. In addition, because first soldered connection 2 and second soldered connection 3 can be dismantled with welder body 1 selectively and be connected, the operator can be after finishing using, can be with the welder split that has different welding process for welder body 1, first soldered connection 2, second soldered connection 3 are accomodate respectively and are transported for the welder that has different functions occupies that accomodates the space little, and the transportation is more nimble, and the operator of being convenient for carries.

Specifically, the first welding head 2 and the second welding head 3 are connected to the torch body 1 by screwing. First soldered connection 2 and second soldered connection 3 can be dismantled with welder body 1 through the screw thread mode and be connected, make welder dismouting more convenient, quick. Meanwhile, the threads are easy to machine and realize, and the manufacturing cost of the first welding head 2 and the second welding head 3 can be effectively reduced. In other embodiments, the first welding head 2 and the third welding head 3 can also be connected with the welding gun body 1 through pins to realize quick fixing, detaching and replacing 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 be clamped and fixed by being matched with each other through a buckle, the buckle protrusions are arranged on the first welding head 2 and the second welding head 3, the clamping groove is arranged on the welding gun body 1, when the welding gun is used, the first welding head 2 or the second welding head 3 can be buckled through plugging to realize quick fixed connection, the first welding head 2 and the second welding head 3 can be quickly replaced, convenience and rapidness are achieved, the working efficiency is improved, and the switching time of two welding processes is shortened.

Fig. 1 is a schematic diagram showing an internal structure of a torch body 1, fig. 2 is a schematic diagram showing an internal structure of a tig torch, and a torch for performing a tig welding process in which a first welding head 2 is attached to the torch body 1 will be described below with reference to fig. 1 and 2.

As shown in fig. 1 and 2, the torch body 1 includes a torch gooseneck 12, a conductive tip seat 13, and a tungsten electrode holder 14. Wherein, the welding gun gooseneck 12 and the conductive nozzle base 13 are arranged in sequence along the axis direction of the welding gun and are electrically connected, the welding gun gooseneck 12 and the conductive nozzle base 13 form a first conductive body, the tungsten electrode clamp 14 is arranged in the conductive nozzle base 13, the tungsten electrode clamp 14 is electrically connected with the welding gun gooseneck 12 and the conductive nozzle base 13 respectively, and the tungsten electrode clamp 14 can clamp the tungsten electrode. During welding, current is conducted through the gooseneck 12 of the welding gun, the tungsten electrode clamp 14 and the tungsten electrode, and the base metal and the filler wire are melted by utilizing electric arc heat generated between the tungsten electrode and the workpiece, so that the workpiece is welded.

Specifically, the conductive nozzle base 13 in the welding gun body 1 is detachably connected with the welding gun gooseneck 12, the tungsten electrode clamp 14 is arranged inside the conductive nozzle base 13, one end of the tungsten electrode clamp 14 is pressed against the welding gun gooseneck 12, and the other end of the tungsten electrode clamp 14 is pressed against the inner wall of the conductive nozzle base 13. When the welding gun is not used, the conductive nozzle holder 13, the welding gun gooseneck 12 and the tungsten electrode clamp 14 can be disassembled into three parts for storage and transportation of each structural component of the welding gun body 1, and the three parts are respectively maintained and repaired. Further specifically, in the embodiment, the conductive nozzle base 13 is connected to the welding gun gooseneck 12 in a threaded manner, and the threads on the conductive nozzle base 13 and the welding gun gooseneck 12 are convenient and quick to machine, and the cost is low. In addition, when the thread is worn, the conductive nozzle seat 13 and the welding gun gooseneck 12 can be tapped again, and the conductive nozzle seat 13 and the welding gun gooseneck 12 are convenient to maintain.

Fig. 2 is a schematic diagram of the internal structure of the tig welding gun, and for facilitating understanding of the specific structure and connection of the first welding head 2, the following description will be made with reference to fig. 2:

as shown in fig. 2, the first welding head 2 includes an argon arc nozzle 21, the argon arc nozzle 21 is sleeved on the periphery of the welding gun body 1, a tungsten electrode can be clamped in the welding gun body 1, a gas channel is formed in the welding gun body 1, a gas guide hole is formed in the side wall of the welding gun body 1, inert shielding gas can be introduced into the gas channel, during welding, the shielding gas is continuously sprayed out from the argon arc nozzle 21, a gas protection layer is formed around the arc to isolate air, so as to prevent the air from having harmful effects on the tungsten electrode, a molten pool and an adjacent heat affected zone, so that a high-quality welding seam can be obtained, and the tungsten electrode and the argon arc nozzle 21 are matched with the welding gun body 1 to perform a tungsten electrode inert gas shielded welding process.

Specifically, the conductive nozzle base 13 is sleeved with the argon arc porcelain nozzle 21, the argon arc porcelain nozzle 21 is detachably connected to the conductive nozzle base 13, and the first welding head 2 and the welding gun body 1 are combined to form the welding gun. When the argon arc ceramic nozzle is started to work, the tungsten electrode clamp 14 clamps the tungsten electrode, and the tungsten electrode can extend out of the argon arc ceramic nozzle 21. Inert protective gas can be introduced into the welding gun body 1, the first conductive body and the tungsten electrode clamp 14 are electrified, electric arc heat generated between a tungsten electrode and a workpiece melts base metal and a filling welding wire, the protective gas is continuously sprayed out from the argon arc ceramic nozzle 21 through the gas guide hole during welding, a gas protective layer is formed around the electric arc to isolate air, so that harmful effects on the tungsten electrode, a molten pool and an adjacent heat affected zone are prevented, and a high-quality welding seam can be obtained. The inert protective gas adopts argon.

More specifically, the argon arc ceramic nozzle 21 is detachably connected to the conductive nozzle base 13 in any one of a threaded connection, a pin connection and a snap connection. In this embodiment, in order to facilitate the detachment of the argon arc porcelain nozzle 21 and reduce the processing cost of the workpiece by reducing the processing technology of the joint, the argon arc porcelain nozzle 21 is connected to the welding gun body 1 through threads.

To facilitate an understanding of the specific structure of the tungsten electrode clamp 14, the specific structure of the tungsten electrode clamp 14 will be described with continued reference to fig. 1 and 2.

The tungsten electrode clamp 14 is a cylindrical part, a cutting through groove 141 is formed in the periphery of the tungsten electrode clamp 14, the cutting through groove 141 is arranged at the front end of the tungsten electrode clamp 14 in an opening mode, a chamfer 142 is formed in the front end of the tungsten electrode clamp 14, a through hole is formed in the front end of the conductive nozzle base 13, and in the process that the conductive nozzle base 13 is installed on the welding gun gooseneck 12, the end portion of the tungsten electrode clamp 14 extends into the through hole under the guiding of the chamfer 142, so that the tungsten electrode in the tungsten electrode clamp 14 is clamped tightly.

Specifically, the cutting through grooves 141 are uniformly distributed along the circumferential direction of the tungsten electrode clamp 14, a chamfer 142 is arranged at one end, close to the tungsten electrode clamp 14, of the through hole of the conductive nozzle base 13, when the conductive nozzle base 13 moves along the axial direction of the tungsten electrode clamp 14, the chamfer 142 on the tungsten electrode clamp 14 is extruded by the chamfer of the conductive nozzle base 13, and the tungsten electrode clamp 14 contracts towards the center under the action of the cutting through grooves 141, so that a tungsten electrode is clamped. The clamping or loosening mode of the tungsten electrode is simple and quick, a clamping mechanism is not required to be additionally arranged to clamp the tungsten electrode, and meanwhile, the overall structure of the welding gun is simple, and the cost is reduced.

Aiming at the air guide hole structure on the welding gun body 1, the side wall of the conductive nozzle base 13 is provided with an air vent, and the cutting through groove 141 and the air vent form an air guide hole of the welding gun body 1. The inert gas enters the argon arc ceramic nozzle 21 from the gas channel after passing through the cutting through groove 141 and the vent hole.

Continuing to refer to fig. 2, the welding gun body 1 further comprises an insulating tube body, the insulating tube body and the argon arc porcelain nozzle 21 are sequentially arranged along the axis direction, the insulating tube body and the argon arc porcelain nozzle 21 are sleeved outside the first conductive body, the insulating tube body and the argon arc porcelain nozzle 21 jointly completely insulate and cover the periphery of the first conductive body, and when an operator uses the welding gun, the operator can be prevented from touching the first conductive body, and the personal safety of the operator can be guaranteed.

In this embodiment, for further being convenient for dismantle the change maintenance to insulating body, simultaneously, also for the ease of processing insulating body, reduce cost sets up insulating body into a plurality of structures. Specifically, insulating body includes welder barrel 11 and insulating assembly 15, and wherein, the periphery of welder gooseneck 12 is located to welder barrel 11 cover, and the periphery of electrically conductive seat of chewing 13 is located to insulating assembly 15 cover, and the one end of insulating assembly 15 is supported and is pressed in welder barrel 11, and the other end of insulating assembly 15 is supported and is pressed in argon arc porcelain mouth 21, and the one end that argon arc porcelain mouth 21 is close to insulating assembly 15 is connected in electrically conductive seat of chewing 13. The torch barrel 11 is configured to insulate a portion or all of the torch gooseneck 12, and the insulator assembly 15 is configured to insulate a portion of the conductive tip seat 13, and to insulate the entire torch exterior surface in cooperation with the argon arc torch 21.

More specifically, the insulation assembly 15 includes a first insulation sleeve 151 and a second insulation sleeve 152, the first insulation sleeve 151 is sleeved outside the conductive nozzle base 13, and one end of the first insulation sleeve 151 is pressed against the argon arc ceramic nozzle 21. The second insulating sleeve 152 is sleeved outside the welding gun gooseneck 12, one end of the second insulating sleeve 152 is pressed against the welding gun barrel 11, and the other end of the second insulating sleeve 152 is simultaneously pressed against the first insulating sleeve 151 and the conductive nozzle base 13. The insulation assembly 15 comprises the first insulation sleeve 151 and the second insulation sleeve 152, and the insulation assembly 15 is arranged in a split mode, so that the processing difficulty and cost of parts can be reduced. First insulating sleeve 151 is configured to insulate conductive tip seat 13 and second insulating sleeve 152 is configured to insulate a portion of torch gooseneck 12 between torch barrel 11 and first insulating sleeve 151.

In other embodiments, the insulating assembly 15 and the gun barrel of the welding gun may be integrally disposed on the insulating tube, and the insulating tube may also insulate and isolate the welding gun gooseneck 12 and the conductive nozzle base 13. The first insulating sleeve 151 and the second insulating sleeve 152 can also be integrally arranged, and the integrally arranged first insulating sleeve 151 and second insulating sleeve 152 are combined with the welding gun barrel 11 to realize the insulating isolation of an operator from the welding gun gooseneck 12 and the conductive nozzle base 13.

Fig. 3 is a schematic view showing an internal structure of the gas metal arc welding torch, fig. 4 is a schematic view showing a structure of the gas flow divider 32, and a description will now be given of the gas metal arc welding torch in which the second welding head 3 is mounted on the torch body 1, with reference to fig. 3 and 4.

The structure of the welding gun body 1 of the gas metal arc welding gun is the same as that of the welding gun body 1 of the tungsten inert gas arc welding gun, and the welding gun body 1 and the welding gun body are universal and are not described in detail herein.

As shown in fig. 3, the second welding head 3 includes a conductive nozzle 31 and a gas shielded arc welding torch nozzle 33 which are sequentially sleeved from inside to outside, and the conductive nozzle 31 and the gas shielded arc welding torch nozzle 33 are matched with the torch body 1 to perform the gas shielded arc welding process.

Specifically, in the consumable electrode gas shielded welding torch, the welding torch gooseneck 12, the conductive nozzle seat 13 and the conductive nozzle 31 are sequentially arranged along the axial direction of the welding torch and are electrically connected, and the welding torch gooseneck 12, the conductive nozzle seat 13 and the conductive nozzle 31 form a second conductive body. During welding, the welding wire sequentially penetrates through the welding gun gooseneck 12, the conductive nozzle base 13 and the conductive nozzle 31, when the second conductive body is electrified, the welding wire is in contact with the second conductive body to generate welding arc, and the welding wire is continuously melted to provide welding flux for welding.

The connection relationship between the conductive nozzle 31 and the gas shielded welding torch nozzle 33 and the torch body 1 is as follows: one end of the conductive nozzle 31 is detachably connected to the conductive nozzle base 13, the other end of the conductive nozzle 31 extends out of the gas shielded welding torch nozzle 33, and the gas shielded welding torch nozzle 33 is sleeved and detachably connected to the torch body 1.

More specifically, one end of the conductive nozzle 31 is provided with an external thread, the conductive nozzle base 13 is provided with an internal thread, and the conductive nozzle 31 is in threaded connection with the conductive nozzle base 13. Through the threaded connection of the conductive nozzle 31 and the conductive nozzle base 13, the conductive nozzle 31 and the conductive nozzle base 13 can be conveniently detached, the processing technology of the connection part of the conductive nozzle 31 and the conductive nozzle base 13 can be reduced, and the processing cost of the conductive nozzle 31 and the conductive nozzle base 13 is reduced.

In order to ensure the personal safety of an operator when the welding gun is used and reduce the electric shock hazard of the operator, the welding gun body 1 in the embodiment further comprises an insulating pipe body, the insulating pipe body and the gas shielded welding gun nozzle 33 are sequentially arranged along the axis direction of the welding gun, the insulating pipe body and the gas shielded welding gun nozzle 33 are both sleeved outside the second conductive body, and the insulating pipe body and the gas shielded welding gun nozzle 33 jointly insulate the periphery of the second conductive body.

Specifically, gas shielded arc welding welder nozzle 33 can be dismantled with the insulating body and be connected, and convenient quick dismantlement, change, simultaneously, after having used up welder, also be convenient for accomodate gas shielded arc welding welder nozzle 33 and insulating body respectively to and maintain respectively. Gas shielded arc welding welder nozzle 33 threaded connection adopts threaded connection in insulating body in this embodiment, and the structural style of screw thread is simple, easily manufacturing, and the difficult appearance of guaranteeing gas shielded arc welding welder nozzle 33 and insulating body is not hard up in the fastening of connection that can also make gas shielded arc welding welder nozzle 33 and insulating body.

The specific structure of the insulating tube body has been described in the tig welding torch described above, and the insulating tube body is a common structure in both torch structures. In a gas metal arc welding torch, one end of the dielectric assembly 15 is pressed against the torch barrel 11 and the other end is pressed against the gas splitter 32. The gas shielded welding torch nozzle 33 is sleeved on the insulating assembly 15 and detachably connected with the torch barrel 11. The torch barrel 11 is configured to insulate the torch gooseneck 12, and the gas shielded welding torch nozzle 33 is attached to the torch barrel 11 at one end thereof, such that the torch barrel 11 and the gas shielded welding torch nozzle 33 cooperate to insulate the exterior surface of the torch. The insulating assembly 15 is positioned inside the nozzle 33 of the gas shielded welding torch and insulates the conductive nozzle base 13, so that the personal safety of an operator is further ensured.

In other embodiments, the welding torch gooseneck 12 and the insulating assembly 15 can be integrated into a single structure that fits over the welding torch gooseneck 12 and a portion of the conductive tip seat 13, and the gas shielded welding torch nozzle 33 fits over and is removably attached to the torch barrel, the integrated structure cooperating with the gas shielded welding torch nozzle 33 to insulate the outer circumference of the torch.

More specifically, the connection relationship between the insulation assembly 15 and each structural member of the second welding head 3 in the present 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 contact holder 13, and one end of the first insulating sleeve 151 is pressed against the gas splitter 32. The second insulating sleeve 152 is sleeved outside the welding gun gooseneck 12, one end of the second insulating sleeve 152 is pressed against the welding gun barrel 11, and the other end of the second insulating sleeve 152 is simultaneously pressed against the first insulating sleeve 151 and the conductive nozzle base 13. Specifically, the gas shielded welding torch nozzle 33 is screwed to the torch barrel 11.

As shown in fig. 3 and 4, the welding torch body 1 further includes a gas splitter 32, the gas splitter 32 is disposed between the nozzle of the gas shielded welding torch and the second conductive body along the radial direction of the welding torch, a splitting hole 321 is formed in the gas splitter 32, a gas passage is formed inside the welding torch body 1, and the gas passage is communicated with the splitting hole 321.

The shielding gas enters the gas shielded welding torch nozzle 33 through the diversion hole 321 of the gas diverter 32. After the shielding gas is divided by the gas splitter 32, the shielding gas at each position in the nozzle 33 of the gas shielded welding torch is basically the same, and the welding is ensured to be carried out in a uniform shielding gas atmosphere.

With continued reference to fig. 3 and 4, a plurality of groups of branch holes are arranged on the gas splitter 32 along the axial direction of the welding gun, each group of branch holes includes a plurality of branch holes 321 distributed along the circumferential direction, and the projections of the branch holes 321 in two adjacent groups of branch holes on the cross section of the gas splitter 32 are not coincident. The diversion holes 321 are arranged in the above manner, so that the shielding gas entering the nozzle 33 of the gas shielded welding gun is more uniform, the gas density of the welding rod in the range of the shielding gas is more uniform during welding, and the welding effect is further ensured. In this embodiment, the shielding gas is CO2 gas.

Specifically, gas splitter 32 is sleeved on conductive tip holder 13 and detachably connected to conductive tip holder 13. The gas splitter 32 is detachably connected with the wire nozzle base 13, can be quickly detached and stored, and is convenient to maintain and maintain. In this embodiment, gas splitter 32 is fitted around conductive tip holder 13 and is screwed to conductive tip holder 13. The gas diverter 32 is connected with the conductive nozzle base 13 through threads, the threads are simple in structural form and easy to process and manufacture, and the gas diverter is connected and fastened with the conductive nozzle base 13 and is not easy to loosen.

For ease of understanding, the operation of the tig and mig torches will now be described.

1. The working principle of the tungsten inert gas shielded welding gun is as follows:

as shown in FIG. 2, the arrow in the figure shows the flowing direction of the inert gas, after the welding gun gooseneck 12 is electrified, the tungsten electrode clamp 14 is electrified, the tungsten electrode clamped by the tungsten electrode clamp 14 is used as a non-melting electrode, an electric arc is generated between the end part of the extended tungsten electrode and a welding workpiece, the welding workpiece is heated, at the moment, the inert gas is used as a protective gas, the inert gas enters from a gas channel, sequentially passes through the cutting through groove 141 of the tungsten electrode clamp 14 and the vent hole arranged on the side wall of the conductive nozzle base 13 and enters the argon arc ceramic nozzle 21, and the inert gas is sprayed to the welding area through the argon arc ceramic nozzle 21 to protect the tungsten electrode, the electric arc and the molten pool from the atmosphere.

2. The working principle of the gas metal arc welding gun is as follows:

after the welding process of the TIG welding is completed, the argon arc ceramic nozzle 21 is disassembled and replaced by the conductive nozzle 31, the gas splitter 32 and the gas shielded welding gun nozzle 33 to form a gas shielded welding gun of the consumable electrode.

As shown in FIG. 3, the arrows indicate the flowing direction of the shielding gas, when in operation, the welding torch gooseneck 12 is electrified, the electric conduction nozzle seat 13 and the electric conduction nozzle 31 are conducted, an electric arc is generated between the electric conduction nozzle 31 and a welding workpiece, and the electric arc is used as a heat source to melt the welding wire and the base metal. Meanwhile, the protective gas enters from the gas channel, sequentially passes through the cutting through groove 141 of the tungsten electrode clamp 14 and the vent hole on the side wall of the conductive nozzle seat 13, enters the inside of the gas shielded welding torch nozzle 33, and is sprayed to the welding area through the gas shielded welding torch nozzle 33, so that the molten welding wire, the electric arc, the molten pool and the base metal of the molten pool accessory are protected from the atmosphere.

It should be understood that the above-described 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. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A welding gun comprises a welding gun body (1) and is characterized by further comprising 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 and detachably connected with the welding gun body (1), the welding gun body (1) is matched with the first welding head (2) to achieve a first welding process, and the welding gun body (1) is matched with the second welding head (3) to achieve a second 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 with the welding gun body (1) by any one of screwing, pinning and snapping.

3. The welding gun according to claim 1, characterized in that the first welding head (2) comprises:

argon arc porcelain mouth (21), welder body (1) facial make-up accompanies the tungsten pole, argon arc porcelain mouth (21) cover is established the outside of tungsten pole, the tungsten pole with argon arc porcelain mouth (21) with welder body (1) cooperatees and welds welding process in order to carry out tungsten pole inert gas.

4. The welding gun according to claim 3, characterized in that the welding gun body (1) comprises:

the welding gun gooseneck (12) and the conductive nozzle seat (13) are sequentially arranged 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;

the tungsten electrode clamp (14) is arranged in the conductive nozzle base (13) and is electrically connected with the welding gun gooseneck (12) and the electric nozzle base (13) respectively, and the tungsten electrode clamp (14) is used for clamping the tungsten electrode.

5. The welding gun according to claim 4, characterized in that the welding gun body (1) further comprises:

the insulating tube body, with argon arc porcelain mouth (21) are followed welder's axis direction arranges in proper order, the insulating tube body with argon arc porcelain mouth (21) are all established the cover and are established the outside of first conductive body, so that first conductive body is insulating.

6. A welding gun according to claim 4 or 5, characterized in that the conductive nozzle holder (13) is detachably connected with the welding gun gooseneck (12), one end of the tungsten electrode clamp (14) is pressed against the end part 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 nozzle holder (13).

7. The welding gun according to claim 4 or 5, characterized in that the tungsten electrode holder (14) is a cylindrical member, a cutting through groove (141) is formed in the periphery of the tungsten electrode holder (14), the cutting through groove (141) is arranged in an opening manner at the front end of the tungsten electrode holder (14), a chamfer (142) is formed at the front end of the tungsten electrode holder (14), a through hole is formed at the front end of the conductive nozzle holder (13), and the end of the tungsten electrode holder (14) extends into the through hole under the guidance of the chamfer (142) in the process of mounting the conductive nozzle holder (13) on the welding gun gooseneck (12), so that the tungsten electrode holder (14) clamps the tungsten electrode inside the tungsten electrode holder.

8. The welding gun according to claim 1, characterized in that the second welding head (3) comprises a conductive nozzle (31) and a gas shielded welding gun nozzle (33) which are sleeved from inside to outside, and the conductive nozzle (31) and the gas shielded welding gun nozzle (33) are matched with the welding gun body (1) to perform the gas shielded metal arc welding process.

9. The welding gun according to claim 8, characterized in that the welding gun body (1) comprises:

the welding gun comprises a welding gun gooseneck (12) and a conductive nozzle base (13), wherein the welding gun gooseneck (12), the conductive nozzle base (13) and the conductive nozzle (31) are sequentially arranged along the axis direction of the welding gun and are electrically connected, and the welding gun gooseneck (12), the conductive nozzle base (13) and the conductive nozzle (31) form a second conductive body.

10. The welding gun according to claim 9, characterized in that the welding gun body (1) further comprises:

the insulating tube body and the gas shielded welding torch nozzle (33) are sequentially arranged along the axis direction of the welding torch, and the insulating tube body and the gas shielded welding torch nozzle (33) are sleeved outside the second conductive body so as to insulate the second conductive body.

11. The welding gun according to claim 10, characterized in that the welding gun body (1) further comprises:

the gas distributor (32) is arranged between the gas shielded welding gun nozzle (33) and the second conductive body along the radial direction of the welding gun, a distributing hole (321) is formed in the gas distributor (32), a gas channel is formed in the welding gun body (1), and the gas channel is communicated with the distributing hole (321).

12. The welding gun according to claim 11, wherein a plurality of groups of branch holes are arranged on the gas splitter (32) along the axial direction of the welding gun, each group of branch holes comprises a plurality of circumferentially distributed branch holes (321), and the projections of the branch holes (321) in two adjacent groups of branch holes on the cross section of the gas splitter (32) are not coincident.