CN214602442U

CN214602442U - Gas shielded welding contact tip and gas shielded welding gun

Info

Publication number: CN214602442U
Application number: CN202120157438.6U
Authority: CN
Inventors: 叶贵锋; 李峰峰; 王轩
Original assignee: Tianjin Jinjian Aerospace Equipment Co ltd
Current assignee: Tianjin Jinjian Aerospace Equipment Co ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-11-05
Anticipated expiration: 2031-01-20

Abstract

The utility model provides a gas shielded arc welding contact tip and gas shielded arc welding welder. The gas shielded welding contact tip comprises a body, wherein a welding wire channel is arranged in the middle of the body, and an annular isolating body is arranged on the outer surface of the body; the annular isolating body is arranged by protruding out of the outer surface of the body along the radial direction vertical to the axis of the welding wire channel; the size of the annular spacer in the radial direction is smaller than the inner diameter of a corresponding portion of the shield tip that is mated with the gas shielded welding contact tip. The technical scheme of the utility model can wide application in the gas shielded arc welding field, use, the maintenance cost is low, and production efficiency is high.

Description

Gas shielded welding contact tip and gas shielded welding gun

Technical Field

The utility model relates to a welding equipment is with accessory, especially the accessory of the welder part of gas shielded arc welding.

Background

Gas shielded welding is arc welding using a gas shielded arc and a weld zone. The gas shielded welding mainly comprises argon shielded welding and carbon dioxide shielded welding. The welding gun for gas shielded welding comprises a contact tip, a protective tip and the like. As shown in fig. 1, in the conventional gas shielded welding torch structure, a protective tip 102 has a tubular structure, and a contact tip 101 is provided in the protective tip 102. Carbon dioxide or other shielding gas is ejected along the gap between the contact tip 101 and the shield tip 102 to form a gas layer to protect the arc and the welding zone.

During the gas shielded welding work, spattered slag is easily generated, and the spattered slag is easily adhered to a portion of the welding torch adjacent to the welding zone, i.e., the left end portion of the shield tip shown in fig. 1, due to the temperature rise. The build-up of adherent slag over time can cause blockages to the relevant parts of the gun. At the moment, the accumulated welding slag needs to be cleaned, otherwise, the welding gun cannot work normally. Since the spatter of the welding slag penetrates deep into the deep portion of the protection tip 102, the cleaning work is not only very troublesome, but also damages to the protection tip and other parts are easily caused during the cleaning process.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the welding slag on the gas shielded welding gun is not easy to clean, the utility model provides a gas shielded welding contact tip and gas shielded welding gun.

The technical scheme of the utility model as follows:

the gas shielded welding contact tip comprises a body, wherein a welding wire channel is arranged in the middle of the body, and an annular isolating body is arranged on the outer surface of the body; the annular isolating body is arranged by protruding out of the outer surface of the body along the radial direction vertical to the axis of the welding wire channel; the size of the annular spacer in the radial direction is smaller than the inner diameter of a corresponding portion of the shield tip that is mated with the gas shielded welding contact tip.

Optionally, the material of the annular spacer includes a ceramic material.

Optionally, the shape of the annular spacer comprises a circular ring shape.

Optionally, an inner ring of the annular isolating body is provided with an assembling thread, and the outer surface of the body is provided with a thread matched with the assembling thread.

The gas shielded welding gun comprises the gas shielded welding contact tip.

The utility model discloses technical scheme's technological effect:

the utility model discloses a gas shielded arc welding contact tip is provided with along radial convex cyclic annular isolator on the body, and the radial dimension of cyclic annular isolator is less than the inside radial dimension of corresponding protection mouth. Thus, the annular insulating body largely isolates the part of the protective nozzle extending into the welding area, and only a small gap between the annular insulating body and the protective nozzle is reserved for the protective gas to flow out. Due to the existence of the annular isolation body, welding slag splashed from a welding area is shielded and cannot easily penetrate into the protection nozzle. The less space between annular isolator and the shield nozzle is because the inherent angle that the welding slag splashes to and the protective gas who flows out at a high speed from this space for inside the welding slag is difficult to enter into the shield nozzle through this space, just so make the welding slag concentrate and the welder mouth part carry out the accumulation, and the welding slag of welder mouth part is cleared up more easily.

In addition, because the setting of cyclic annular isolator hinders the inside quick outflow of protective gas from the protection mouth for at the inside protective gas pressure reinforcing of protection mouth, protective gas and protection mouth carry out the time extension of heat exchange simultaneously, this radiating efficiency who has improved the protection mouth. The protective nozzle with good heat dissipation has lower temperature, which is not beneficial to the adhesion of welding slag.

To sum up, the gas shielded arc welding contact tip and the technical scheme of gas shielded arc welding welder have realized the utility model discloses an aim.

Drawings

Fig. 1 is a structural view of a conventional gas shielded welding torch.

Fig. 2 is a perspective view of an embodiment of the contact tip for gas shielded welding according to the present invention.

Fig. 3 is the structure diagram of the welding gun for gas shielded welding of the utility model.

The designations in the figures illustrate the following:

101. a contact tip; 102. protecting the mouth;

201. a welding wire channel; 202. a thread; 203. an annular spacer; 204. a contact tip body;

301. the mouth is protected.

Detailed Description

The technical solution of the present invention will be described below with reference to fig. 2 and 3.

Fig. 2 shows an embodiment of the contact tip for gas shielded welding of the present invention. The contact tip includes a contact tip body 204 that is cylindrical. A wire passage 201 is provided in the middle of the contact tip body 204 for the wire to pass through. An annular spacer 203 is provided on the outer surface of the contact tip body 204. The annular spacer 203 is an annular structure, is disposed around the contact tip body 204, and protrudes from the outer surface of the contact tip body 204 along a radial direction of the contact tip body 204 perpendicular to the axis of the welding wire channel 201. Threads 202 are provided on the outer surface of the contact tip body 204. On the inner ring of the annular insulator 203, fitting threads (not shown in the figure) matching the threads 202 are provided. The annular spacer 203 is rotatably fitted into the position shown in fig. 2 by the thread 202. The annular spacer 203 is made of ceramic.

Fig. 3 shows, in cross-section, an embodiment of a portion of a gas shielded welding torch of the present invention. The contact tip shown in fig. 2 is provided in the protective tip 301, and the fitting relationship between the contact tip and the protective tip is not changed as compared with the prior art shown in fig. 1. As can be seen in fig. 3, the radial dimension of the annular partition 203 is smaller than the radial dimension of the inside of the protection mouth 301, so that a gap for the passage of the protection gas is left between the annular partition 203 and the protection mouth 301.

The operation of the welding torch part of the gas shielded welding shown in fig. 3 is described below to further illustrate the technical solution of the present invention. In the following description, unless otherwise specified, the description of the orientation of the other party, such as left and right, is based on the orientation shown in fig. 3.

During operation, the welding wire is fed out from the left side of the contact tip, i.e., the left side of the portion of the gas shielded welding torch shown in fig. 3 is the welding zone, and the shielding gas flows from the right side to the left side inside the contact tip and flows out at the left end. The slag splashed from the welding zone is jetted to the left side portion of the gas shielded welding torch, and a part of the slag is likely to be splashed into the inside of the shield tip 301. The welding slag adhered to the inner wall of the protection tip 301 is less likely to be cleaned relative to the outside of the protection tip 301 due to the small operation space, and particularly, the welding slag on the inner wall of the deeper inside of the protection tip 301, that is, the right side portion of the protection tip 301, is hardly cleaned, which may cause the protection tip 301 to be scrapped. The annular isolator 203 forms an isolation barrier to prevent spatter from reaching the deeper interior of the shield tip 301. Although a gap is left between the annular isolation body 203 and the protection nozzle 301, on one hand, the gap is small, and the splashed welding slag is not easy to pass through due to the problems of movement angles and the like; on the other hand, the gap is provided with the shielding gas, and after the shielding gas passes through the gap, the flow velocity is enhanced, and the kinetic energy is enough to disperse the welding slag. In addition, the annular isolation body 203 obstructs the flowing of the shielding gas, so that the shielding gas and the protection nozzle 301 can exchange heat more sufficiently, the heat exchange efficiency of the shielding gas and the protection nozzle 301 is improved, the temperature of the protection nozzle 301 is lower, and the protection nozzle is not easy to adhere to welding slag. Therefore, due to the annular isolation body 203, welding slag adhered to the inner wall of the protection nozzle 301 is concentrated in the left side area of the protection nozzle, is close to the left end opening of the protection nozzle 301, and is easier to clean. The annular spacer 203 is made of ceramic materials, welding slag is not easy to adhere to the annular spacer, and even the welding slag is adhered to the annular spacer, the annular spacer is easy to clean, so that the annular spacer can be repeatedly used, and the cost is reduced.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the present invention can also be modified in materials and structures, or replaced by technical equivalents. Therefore, all structural equivalents which may be made by applying the present invention to the specification and drawings, or by applying them directly or indirectly to other related technical fields, are intended to be encompassed by the present invention.

Claims

1. Gas shielded arc welding contact tip sets up the body of welding wire passageway including the centre, its characterized in that: an annular isolating body is arranged on the outer surface of the body; the annular isolating body is arranged by protruding out of the outer surface of the body along the radial direction vertical to the axis of the welding wire channel; the size of the annular spacer in the radial direction is smaller than the inner diameter of a corresponding portion of the shield tip that is mated with the gas shielded welding contact tip.

2. The gas-shielded welding contact tip as defined in claim 1, wherein: the annular spacer is made of a ceramic material.

3. The gas-shielded welding contact tip as defined in claim 1, wherein: the annular spacer has a shape including a circular ring.

4. The gas-shielded welding contact tip as defined in claim 1, wherein: the inner ring of the annular isolating body is provided with an assembling thread, and the outer surface of the body is provided with a thread matched with the assembling thread.

5. Gas shielded arc welding welder, its characterized in that: comprising a gas shielded welding contact tip as claimed in any one of claims 1 to 4.