CN219818335U - Welding gun - Google Patents

Abstract

The utility model provides a welding gun, which comprises a conductive nozzle and a conductive nozzle joint which are connected; the contact tip is provided with a power receiving surface, and the power receiving surface is a conical surface or a rotating curved surface; the contact tip connector is provided with a feeding surface matched with the power receiving surface; after the contact tip is fixedly connected with the contact tip connector, the power receiving surface and the power feeding surface are abutted and tightly attached to each other. In the technical scheme, the power receiving surface of the contact tip is set to be a conical surface or a rotating curved surface, and the power feeding surface and the power receiving surface of the contact tip are tightly attached, so that the contact area between the contact tip and the contact tip is increased, and the conductivity and the heat dissipation efficiency of the contact tip are further improved. Under the condition of high-current welding, the electric arc heat of the contact tip can be quickly conducted out, the heat loss is reduced, and the service life is prolonged.

Description

Welding gun

Technical Field

The utility model relates to the field of welding equipment, in particular to a welding gun.

Background

A welding gun refers to a structure that performs a welding operation during welding. The welding gun is a tool for gas welding, and is used as a heat source by spraying high-temperature flame.

The contact tip is used as an output end of the welding gun and mainly plays a role in conducting welding wires. The contact tip needs to be able to withstand the transfer of welding heat. However, in the prior art, under the condition of long-time welding, the strength of the material of the contact tip body is reduced due to the increase of the temperature of the contact tip body, so that the conductivity between the welding wire and the contact tip is affected, and the contact tip loss is increased.

Disclosure of Invention

The utility model provides a welding gun, which is used for reducing the loss of a conductive nozzle in the welding gun at a high temperature.

The utility model provides a welding gun, which comprises a conductive nozzle and a conductive nozzle joint which are connected; the contact tip is provided with a power receiving surface, and the power receiving surface is a conical surface or a rotating curved surface; the contact tip connector is provided with a feeding surface matched with the power receiving surface; after the contact tip is fixedly connected with the contact tip connector, the power receiving surface and the power feeding surface are abutted and tightly attached to each other.

In the technical scheme, the power receiving surface of the contact tip is set to be a conical surface or a rotating curved surface, and the power feeding surface and the power receiving surface of the contact tip are tightly attached, so that the contact area between the contact tip and the contact tip is increased, and the conductivity and the heat dissipation efficiency of the contact tip are further improved. Under the condition of high-current welding, the electric arc heat of the contact tip can be quickly conducted out, the heat loss is reduced, and the service life is prolonged.

In a specific embodiment, the power receiving surface is an outer surface provided at an end portion of the contact tip at which the contact tip is connected to the contact tip connector; the feed surface is an inner surface arranged at one end of the contact tip connector connected with the contact tip.

In the above technical scheme, through setting up the face that receives electricity in the surface of the tip of the one end that contact tip and contact tip are connected, set up the power feeding face in the internal surface of the one end that contact tip connects with the contact tip for contact tip and contact tip connect fixedly after, receive electricity face and power feeding face can mutual butt and closely laminate each other.

In a specific embodiment, the contact tip is rotatable about a first axis and threadably coupled to the contact tip connector; the axis of the conical surface and the rotating axis of the rotating curved surface are both overlapped with the first axis.

In a specific embodiment, the contact tip connector is internally provided with a first accommodation groove and a second accommodation groove along the extending direction of the first shaft; one end of the contact tip, which is provided with the power receiving surface, is arranged in the first accommodating groove; the feed surface is arranged at one side, close to the second accommodating groove, of the inner part of the first accommodating groove; the welding gun also comprises a gun barrel; the end of the gun barrel is arranged inside the second accommodating groove.

In the above technical scheme, through arranging the one end that has the face of receiving electricity on the contact tip in inside the first holding tank, the power feeding face sets up in inside being close to second holding tank one side of first holding tank for the face of receiving electricity on the contact tip is fixed and laminating along with the connection of contact tip and contact tip connector with the power feeding face inside the first holding tank.

In a specific embodiment, the contact tip connector is circumferentially provided with a plurality of first through holes; the plurality of first through holes are communicated with the second accommodating groove.

In a specific embodiment, the welding gun further comprises an air screen; the air screen is in threaded connection with the contact tip connector; a chamber for containing gas is formed between a part of the structure of the gas screen and the contact tip connector; the plurality of first through holes are communicated with the cavity.

In the technical scheme, the cavity for containing the gas is formed between the part of the structure provided with the gas screen and the contact tip connector, and the first through holes are communicated with the cavity, so that the gas flowing out of the first through holes enters the cavity to play a role in buffering, and the flow rate of the gas is reduced.

In a specific embodiment, the air screen is circumferentially provided with a plurality of air holes; the air holes are communicated with the cavity.

In the technical scheme, the plurality of air holes are formed in the circumferential direction of the air screen and are communicated with the cavity, so that gas flowing in and stored by the plurality of first through holes in the cavity is sprayed around a welding area in a dispersed manner through the plurality of air holes on the air screen, and the effect of gas protection of the welding gun in the welding process is improved.

In a specific embodiment, the pore diameters of the plurality of air holes are smaller than the pore diameters of the plurality of first through holes; the number of the air holes is larger than that of the first through holes.

In the technical scheme, the pore diameters of the air holes are smaller than those of the first through holes, the number of the air holes is larger than that of the first through holes, so that the gas flowing in and stored by the first through holes in the cavity is more and more along with the gas in the cavity, and the gas continuously enters the cavity, is extruded to be sprayed out of the air holes, and the uniform and dispersed spraying of the gas is realized. The effect of gas protection of the welding gun during welding is improved.

In a specific embodiment, the welding gun further comprises an air screen and a nozzle arranged on the circumferential outer side surface of the air screen; the gun barrel is in threaded connection with the nozzle.

In a specific embodiment, a gas channel for introducing gas is arranged inside the gun barrel; the contact tip connector is circumferentially provided with a plurality of first through holes; the plurality of first through holes are communicated with the gas channel.

In the technical scheme, the plurality of first through holes are communicated with the gas channel, so that gas flowing out of the gas channel in the gun barrel flows into the cavity through the first through holes for buffering.

Drawings

FIG. 1 is a schematic view of a prior art welding gun;

fig. 2 is a schematic diagram of a welding gun with a conical power receiving surface according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a welding gun with a power receiving surface being a rotating curved surface according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of a feeding surface structure attached to a conical power receiving surface according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a feeding surface structure attached to a power receiving surface with a shape of a rotating curved surface according to an embodiment of the present utility model.

In the figure: 1. a contact tip; 11. a power receiving surface; 2. a contact tip connector; 21. a first accommodation groove; 22. a second accommodation groove; 23. a feed surface; 24. a first through hole; 3. a barrel; 31. a gas channel; 4. an air screen; 41. air holes; 5. a chamber; 6. a nozzle; 7. a contact tip in the prior art; 71. the end face of the thread root of the contact tip; 8. a contact tip in the prior art; 81. the front end face of the contact tip connector; 9. and (5) a screwed thread matching surface.

Detailed Description

The utility model is further described in detail below by means of the figures and examples. The features and advantages of the present utility model will become more apparent from the description.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present utility model may be combined with each other as long as they do not collide with each other.

In order to facilitate understanding of the welding gun provided by the embodiment of the utility model, an application scene of the welding gun is described first. As shown in fig. 1, the external thread of the contact tip 7 in the welding gun of the current prior art is screwed with the internal thread of the contact tip fitting 8. Wherein the thread root end surface 71 of the contact tip contacts the tip end surface 81 to form a conductive path. The conductive surface comprises a screwed matching surface of the root end surface 71 of the conductive nozzle and the front end surface 81 of the conductive nozzle joint. Because the contact area between the contact tip 7 and the contact tip connector 8 for conduction and heat dissipation in the welding gun in the prior art is small, when the contact tip 7 is welded with a large current in the process of using the welding gun, the temperature of the contact tip 7 rises faster, the thermal burning loss of the contact tip 7 is higher, and frequent replacement of the contact tip 7 is required. Therefore, the embodiment of the utility model provides a welding gun, which is used for improving the conductivity and the heat dissipation efficiency of a conductive nozzle in the welding gun, so that the conductive nozzle can quickly conduct out the arc heat under the condition of high-current welding, the heat loss is reduced, and the service life is prolonged. The following detailed description is made with reference to the specific drawings and examples.

Referring to fig. 2 and fig. 3 together, fig. 2 shows a schematic diagram of a welding gun with a conical power receiving surface 11 according to an embodiment of the present utility model; fig. 3 shows a schematic diagram of a welding gun with a power receiving surface 11 being a rotating curved surface according to an embodiment of the present utility model.

The present utility model illustrates a welding gun. The welding gun comprises a contact tip 1 and a contact tip connector 2 which are connected. The contact tip 1 is a metal structure for guiding a welding wire in the embodiment of the present utility model. The main function of the contact tip 1 is to direct current into the wire and to direct the current more stably to the arc zone. The contact tip 1 is the part with the highest replacement frequency of the welding vulnerable part, and the contact tip 1 also plays a role in fixing the position when a welding wire passes through. Because the current passing through the welding gun in the heavy current working process or at the end of welding of the welding gun is too large, the outlet of the conducting nozzle 1 is easily melted, so that the welding wire is welded with the conducting nozzle 1, and the welding gun cannot continue to work. At this time, the contact tip 1 needs to be replaced.

Referring to fig. 4 and fig. 5 together, fig. 4 shows a schematic structural diagram of a feeding surface 23 attached to a conical power receiving surface 11 according to an embodiment of the present utility model; fig. 5 shows a schematic structural diagram of a feeding surface 23 attached to a power receiving surface 11 having a shape of a rotating curved surface according to an embodiment of the present utility model.

Specifically, the contact tip 1 has a power receiving surface 11. The power receiving surface 11 receives the current supplied from the contact plug connector 2. The power receiving surface 11 is a conical surface or a curved surface of revolution.

The contact tip connector 2 has a power feeding surface 23 that matches the power receiving surface 11. Wherein the feed surface 23 serves to supply current to the contact tip 1 and to transfer heat from the contact tip 1 to the outside.

After the contact tip 1 is fixedly connected with the contact tip connector 2, the power receiving surface 11 and the power feeding surface 23 are abutted against each other and are tightly attached to each other.

During operation of the welding gun, the contact tip connector 2 supplies current to the contact tip 1. The temperature of the contact tip 1 continues to rise as the welding gun continuously welds the contact tip 1. By adopting the mode that the power receiving surface 11 of the contact tip 1 is set to be a conical surface or a rotating curved surface, the power feeding surface 23 of the contact tip connector 2 is tightly attached to the power receiving surface 11, so that the contact surface between the contact tip 1 and the contact tip connector 2 is increased in the area of the attaching surface between the power feeding surface 23 and the power receiving surface 11 besides the contact surface between the end surface of the thread root of the contact tip 1 and the front end surface of the contact tip connector 2 and the mating surface of the threaded connection between the contact tip 1 and the contact tip connector 2.

In the above technical scheme, the contact area between the contact tip 1 and the contact tip connector 2 is increased, so that the conductivity and the heat dissipation efficiency of the contact tip 1 are improved. The electric arc heat conduction of the contact tip 1 can be conducted out rapidly under the condition of high-current welding, so that the heat loss is reduced, and the service life is prolonged.

The power receiving surface 11 in the embodiment of the present utility model is an outer surface provided at an end portion of the contact tip 1 connected to the contact tip connector 2. The power feeding surface 23 is an inner surface provided at an end of the contact tip 2 to which the contact tip 1 is connected. By arranging the power receiving surface 11 on the outer surface of the end part of the end, which is connected with the contact tip 1 and the contact tip connector 2, and arranging the power feeding surface 23 on the inner surface of the end, which is connected with the contact tip 1 and the contact tip connector 2, the power receiving surface 11 and the power feeding surface 23 can be mutually abutted and tightly attached to each other after the contact tip 1 and the contact tip connector 2 are fixedly connected.

Specifically, the contact tip 1 rotates about a first axis and is screwed with the contact tip connector 2.

The axis of the conical surface and the rotating axis of the rotating curved surface are both overlapped with the first axis.

The contact tip tab 2 of the embodiment of the present utility model is provided inside with a first accommodation groove 21 and a second accommodation groove 22 along the extending direction of the first axis. The specific structure of the first accommodating groove 21 is not limited in the embodiment of the present utility model, and may be a part of the structure capable of accommodating the contact tip 1, for example: a cavity with a truncated cone shape inside, a cavity with a truncated cone shape inside and a curved surface shape on the side surface of the truncated cone, and the like.

Illustratively, the power receiving surface 11 of the contact tip 1 is a conical surface, and the specific structure of the corresponding first receiving groove 21 is a cavity having a truncated cone shape inside.

Illustratively, the power receiving surface 11 of the contact tip 1 is a rotating curved surface, and the specific structure of the corresponding first receiving groove 21 is a cavity having a truncated cone inside and a side surface of the truncated cone being a curved surface shape.

The gun also includes a barrel 3. The gun tube 3 is specifically a tubular structure into which welding wires, cooling liquid and shielding gas can be introduced in the embodiment of the utility model. The specific structure of the second receiving groove 22 is not limited in the embodiment of the present utility model, and may be capable of receiving the end portion of the barrel 3, for example: a cavity with a cylindrical shape inside, a cavity with a truncated cone shape inside, etc. The specific structure of the second receiving groove 22 is, for example, a cavity having a cylindrical shape inside. It will be appreciated that the specific configuration of the second receiving recess 22 will vary accordingly as the shape of the end of the barrel 3 changes.

Specifically, the end of the barrel 3 is placed inside the second receiving groove 22.

The end of the contact tip 1 having the power receiving surface 11 is placed inside the first accommodation groove 21. The feeding surface 23 is disposed inside the first accommodation groove 21 on the side close to the second accommodation groove 22.

The first accommodation groove 21 communicates with the second accommodation groove 22.

Since the first accommodation groove 21 is communicated with the second accommodation groove 22, the end of the contact tip 1 with the power receiving surface 11 is placed inside the first accommodation groove 21, and the end of the gun barrel 3 is placed inside the second accommodation groove 22, so that the welding wire inside the gun barrel 3 can pass through the second accommodation groove 22 and enter the contact tip 1 inside the first accommodation groove 21.

The barrel 3 in the embodiment of the present utility model is provided with a gas passage 31 for introducing gas therein. The gas in the embodiment of the utility model specifically refers to a protective gas for protecting a metal droplet, a molten pool and a welding seam area in the welding process. The shielding gas can protect the high-temperature metal from the external gas. The kind of shielding gas includes, but is not limited to, helium and argon.

Specifically, the contact tip holder 2 is provided with a plurality of first through holes 24 in the circumferential direction. In the embodiment of the present utility model, the plurality of first through holes 24 specifically refers to two or more first through holes 24, for example: two first through holes 24, three first through holes 24, six first through holes 24, eight first through holes 24, etc. In the embodiment of the present utility model, eight first through holes 24 are provided in the circumferential direction of the contact tip holder 2. The plurality of first through holes 24 each communicate with the gas passage 31.

By providing the plurality of first through holes 24 in the circumferential direction of the contact tip holder 2, and the plurality of first through holes 24 are each communicated with the gas passage 31, the shielding gas transmitted from the gas passage 31 can be dispersed and circulated out through the plurality of first through holes 24.

The contact tip tab 2 in the embodiment of the present utility model is provided with a plurality of first through holes 24 in the circumferential direction. Specifically, the plurality of first through holes 24 each communicate with the second accommodation groove 22. By providing the plurality of first through holes 24 in the circumferential direction of the contact tip holder 2, and the plurality of first through holes 24 each communicate with the second accommodation groove 22, the plurality of first through holes 24 each communicate with the gas passage 31, so that the gas coming out of the gas passage 31 is dispersed to flow to the welding area through the plurality of first through holes 24 communicating with the second accommodation groove 22.

The welding gun in the embodiment of the utility model also comprises an air screen 4.

Specifically, the air screen 4 is screwed with the contact tip connector 2, and a chamber 5 for containing air is formed between a part of the structure of the air screen 4 and the contact tip connector 2. The plurality of first through holes 24 are each in communication with the chamber 5.

By providing the air screen 4, and the chamber 5 for accommodating the gas is formed between the partial structure of the air screen 4 and the contact tip connector 2, the shielding gas flowing in from the contact tip connector 2 can be stored in the chamber 5, and the continuous flowing-in of the shielding gas can be buffered. By providing the plurality of first through holes 24 each communicating with the chamber 5, the shielding gas flowing in the barrel 3 in the second accommodation groove 22 is dispersed and flown into the chamber 5 through the plurality of first through holes 24.

Specifically, the air screen 4 is provided with a plurality of air holes 41 in the circumferential direction. In the embodiment of the present utility model, the plurality of air holes 41 specifically refers to two or more air holes 41, for example: two air holes 41, three air holes 41, six air holes 41, eight air holes 41, and the like. In the embodiment of the present utility model, eight air holes 41 are provided in the circumferential direction of the contact tip connector 2. A plurality of air holes 41 are each in communication with the chamber 5. The plurality of air holes 41 are distributed along the circumference of the air screen 4.

As an alternative, the plurality of air holes 41 are uniformly dispersed along the circumference of the air screen 4.

The apertures of the plurality of air holes 41 are smaller than the apertures of the plurality of first through holes 24. Wherein the pore diameter in the embodiments of the present utility model refers specifically to the diameter of the pores on the surface of the object.

The number of air holes 41 is greater than the number of first through holes 24.

Through being provided with a plurality of gas pockets 41 at gas sieve 4 circumference dispersion, and the aperture of a plurality of gas pockets 41 is all less than the aperture of a plurality of first through-holes 24, and the number of gas pockets 41 is greater than the number of first through-holes 24, and during the operation of welder, the shielding gas enters into first through-holes 24 from gas channel 31, and rethread first through-holes 24 enters into inside the cavity 5. As the shielding gas in the chamber 5 is more and more, and the continuous shielding gas is also introduced into the chamber 5, the shielding gas is extruded and sprayed out of the plurality of air holes 41, so that the uniformly dispersed spraying of the shielding gas is realized, and the gas shielding effect of the welding gun during welding is improved.

The welding gun in the embodiment of the utility model further comprises an air screen 4 and a nozzle 6 arranged on the outer circumferential side surface of the air screen 4. The nozzle 6 has the function of enabling the shielding gas to flow out through the nozzle 6, so that a good shielding gas cover can be formed to cover the molten pool and the electric arc, and the welding seam is well formed. It should be noted that, the molten pool in the embodiment of the present utility model specifically refers to a liquid metal portion with a certain geometry formed on a weldment under the action of a welding heat source. In particular, the barrel 3 is threadedly connected to the nozzle 6.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc. are directions or positional relationships based on the operation state of the present utility model are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the utility model can be subjected to various substitutions and improvements, and all fall within the protection scope of the utility model.

Claims (10)

1. A welding gun, which is characterized by comprising a conductive nozzle and a conductive nozzle joint which are connected; the contact tip is provided with a power receiving surface, and the power receiving surface is a conical surface or a rotating curved surface; the contact tip connector is provided with a feeding surface matched with the power receiving surface;

after the contact tip is fixedly connected with the contact tip connector, the power receiving surface and the power feeding surface are abutted and tightly attached to each other.

2. The welding gun as defined in claim 1, wherein the power receiving surface is an outer surface provided at an end portion of the contact tip at an end where the contact tip is connected to the contact tip joint; the feed surface is an inner surface arranged at one end of the contact tip connector connected with the contact tip.

3. The welding gun of claim 2, wherein the contact tip rotates about a first axis and is threadably coupled to the contact tip connector;

the axis of the conical surface and the rotating axis of the rotating curved surface are both overlapped with the first axis.

4. The welding gun as defined in claim 3, wherein the contact tip fitting is internally provided with a first accommodation groove and a second accommodation groove along an extending direction of the first shaft; one end of the contact tip, which is provided with the power receiving surface, is arranged in the first accommodating groove; the feed surface is arranged at one side, close to the second accommodating groove, of the inner part of the first accommodating groove; the welding gun also comprises a gun barrel; the end of the gun barrel is arranged inside the second accommodating groove.

5. The welding gun as defined in claim 4, wherein the contact tip fitting is circumferentially provided with a plurality of first through holes; the plurality of first through holes are communicated with the second accommodating groove.

6. The welding gun of claim 5, further comprising an air screen; the air screen is in threaded connection with the contact tip connector; a chamber for containing gas is formed between a part of the structure of the gas screen and the contact tip connector; the plurality of first through holes are communicated with the cavity.

7. The welding gun as defined in claim 6, wherein the air screen is circumferentially provided with a plurality of air holes; the air holes are communicated with the cavity.

8. The welding gun as defined in claim 7, wherein the apertures of the plurality of air holes are each smaller than the apertures of the plurality of first through holes;

the number of the air holes is larger than that of the first through holes.

9. The welding gun as defined in any one of claims 4-8, further comprising an air screen and a nozzle disposed on a circumferentially outer side of the air screen; the gun barrel is in threaded connection with the nozzle.

10. The welding gun as defined in claim 9, wherein a gas passage for passing a gas is provided inside the barrel; the contact tip connector is circumferentially provided with a plurality of first through holes; the plurality of first through holes are communicated with the gas channel.