CN211966290U - Electrode and resistance welder - Google Patents

Abstract

The embodiment of the application provides an electrode and resistance welder, wherein, this electrode includes: a body having a welding end; the first vent hole is arranged on the side surface of the body and extends into the body so as to input protective gas; and the second vent hole is arranged on the end face of the welding end and communicated with the first vent hole so as to spray the protective gas from the end face of the welding end. According to the technical scheme of the embodiment of the application, the surfaces of the welding nucleuses of the workpieces and the adjacent areas of the welding nucleuses can be prevented from generating electric scorching, and the welding quality of the workpieces can be improved.

Description

Electrode and resistance welder

Technical Field

The application relates to the technical field of welding, in particular to an electrode and a resistance welding machine.

Background

This section is intended to provide a background or context to the embodiments of the application that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

Resistance welding is a welding method in which two electrodes are used to clamp overlapping workpieces to form a contact resistance between the workpieces, and the electrodes are energized to generate high-temperature resistance heat in a region where the workpieces are in contact with the electrodes, causing the region and its adjacent regions to melt to form nuggets. However, since the surface of the nugget and the vicinity of the nugget are highly susceptible to air oxidation under high temperature conditions, an electrocautery color, such as black, which is significantly different from the color of the workpiece is exhibited, which may degrade the weld quality.

SUMMERY OF THE UTILITY MODEL

Embodiments of the present application provide an electrode and a resistance welding machine to solve or alleviate one or more technical problems in the prior art.

As an aspect of an embodiment of the present application, an embodiment of the present application provides an electrode including: a body having a welding end; the first vent hole is arranged on the side surface of the body and extends into the body so as to input protective gas; and the second vent hole is arranged on the end face of the welding end and communicated with the first vent hole so as to spray the protective gas from the end face of the welding end.

In one embodiment, the second vent holes comprise at least two, and the second vent holes are uniformly arranged along the circumference of the end face of the welding tip.

In one embodiment, the first vent hole extends in a radial direction of the body, and the second vent hole extends from a periphery of an end face of the welding end toward a central axis of the body.

In one embodiment, neither the end of the first vent nor the end of the second vent exceeds the central axis of the body.

In one embodiment, the first vent hole has a larger aperture than the second vent hole.

In one embodiment, the end face of the welding tip is convex from the outer periphery to the middle.

In one embodiment, the electrode further comprises: and one end of the air inlet pipe is connected with the first vent hole, and the other end of the air inlet pipe is used for inputting the protective gas.

In one embodiment, the body has a connecting end, and the electrode further comprises: the connecting rod is connected with the connecting end through a universal joint.

In one embodiment, the shielding gas comprises an inert gas or nitrogen.

As another aspect of the embodiments of the present application, there is also provided a resistance welding machine including the electrode in any one of the above embodiments.

When the electrode of the technical scheme is used for resistance welding, the welding core surface of the workpiece and the adjacent area of the welding core can be prevented from generating electric scorching, and the welding quality of the workpiece can be improved.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

FIG. 1 shows a schematic structural diagram of an electrode according to an embodiment of the present application;

FIG. 2 shows a perspective schematic view of FIG. 1;

FIG. 3 shows a schematic cross-sectional view of FIG. 1;

FIG. 4 shows a schematic view of an arrangement of an electrode and a workpiece according to an embodiment of the present application;

FIG. 5 shows a schematic structural diagram of another electrode according to an embodiment of the present application;

FIG. 6 is a schematic view showing the connection among the electrodes, the gas input device, the solenoid valve and the power source in the resistance welding machine.

Description of reference numerals:

100-electrodes;

10-a body;

11-welding the ends; 111-end face;

12-a first vent; 13-a second vent; 14-a connection end; 15-a connecting rod; 16-a universal joint;

20-a workpiece; 21-molten metal;

200-a gas input device;

300-a solenoid valve;

400-power supply.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

Fig. 1 shows a schematic structural diagram of an electrode according to an embodiment of the present application. As shown in fig. 1 to 3, the electrode 100 includes: a body 10, a first vent hole 12 and a second vent hole 13; the body 10 has a welding end 11; the first vent hole 12 is disposed on a side surface of the body 10 and extends into the body 10 to input a shielding gas; the second vent hole 13 is provided in the end surface 111 of the welding tip 11 and communicates with the first vent hole 12 to eject the shielding gas from the end surface 111 of the welding tip 11.

The main body 10 may be cylindrical, rectangular, trapezoidal, or other cylindrical shape, or may be truncated cone, rectangular truncated cone, trapezoidal truncated cone, or other truncated cone shape, and the shape of the main body 10 is not limited in the embodiments of the present application.

The electrode 100 of the embodiment of the present application is suitable for use in resistance welders, such as spot welders and projection welders. The spot welder may be a suspension spot welder, a fixed spot welder, or another type of spot welder, and the embodiment of the present application is not limited to the type of the resistance welder as long as the electrode 100 of the embodiment of the present application can be applied.

As shown in fig. 1 to 4, in the embodiment of the present application, two workpieces 20 to be welded are clamped by the pressure action of the body 10 of the electrode 100, and the shielding gas is supplied through the first vent hole 12, since the second vent hole 13 is provided in the end surface 111 of the welding end 11 of the body 10 and communicates with the first vent hole 12, the shielding gas can be ejected from the end surface 111 of the welding end 11 of the body 10 through the second vent hole 13, so that the molten metal 21 (formed by melting the workpieces by resistance heat) and the vicinity of the molten metal 21 in the area directly opposite to the end surface 111 of the welding end 11 are protected from oxidation during welding, the surface of the nugget formed by cooling the molten metal 21 and the vicinity thereof are prevented from being electrically burned, and the color of the surface of the nugget and the vicinity thereof is made to coincide with the color of the workpieces 20, the welding quality can be effectively improved. In addition, the color washing processing treatment of the electrocautery color on the surface of the welding core and the adjacent area of the welding core can be omitted, and the processing efficiency can be improved.

Preferably, the welding method and the welding device can be used for welding the non-ferrous metal workpiece, and can effectively avoid the generation of the electrocautery color on the surface of the nugget of the non-ferrous metal workpiece and the adjacent area of the nugget of the non-ferrous metal workpiece.

In one embodiment, the second venting holes 13 include at least two, and the second venting holes 13 are uniformly arranged along the circumference of the end surface 111 of the welding tip 11. In this manner, the shielding gas can be uniformly dispersed to the end surface 111 of the welding tip 11 through the second vent holes 13, so that the shielding gas is uniformly sprayed from the end surface 111 of the welding tip 11 toward the molten metal 21 of the directly opposed area thereof and the adjacent area of the molten metal 21.

In an example, the number of the second vent holes 13 may be two or more, and the data of the second vent holes 13 may be set according to actual needs, which is not limited in this embodiment of the application.

In one embodiment, the first vent hole 12 extends in a radial direction of the body 10, and the second vent hole 13 extends from a periphery of the end surface 111 of the welding tip 11 toward a central axis of the body 10.

In order to avoid the second ventilation hole 13 occupying the area of the end surface 111 of the welding tip 11 that is in contact with the workpiece 20 in the specific implementation, the second ventilation hole 13 needs to be arranged along the periphery of the end surface 111 of the welding tip 11. However, the inventor finds that in the process of implementing the application: when the drill bit of the control drill drills a hole along the axial direction of the body 10, the drill bit is easily deviated, and the second ventilation hole 13 is caused to penetrate through the side surface of the body 10. Therefore, by extending the second ventilation hole 13 from the periphery of the end surface 111 of the welding end 11 toward the central axis of the body 10, not only can the occupation of the second ventilation hole 13 by the area of the end surface 111 of the welding end 11 in contact with the workpiece 20 be avoided, but also the difficulty in installing the second ventilation hole 13 can be reduced.

In an embodiment, the end of the first vent hole 12 and the end of the second vent hole 13 do not exceed the central axis of the body 10, so that the first vent hole 12 and the second vent hole 13 can be rapidly communicated, and the manufacturing efficiency is improved.

In one embodiment, the aperture of the first vent hole 12 is larger than that of the second vent hole 13, so that the gas flow rate of the first vent hole 12 is larger than that of a single second vent hole 13, and therefore the shielding gas can be sprayed out from all the second vent holes 13 after being input through the first vent hole 12, and the protection performance is improved.

In one example, the diameter of the end surface 111 of the welding end 11 of the body 10 may be 22mm, the length of the side surface of the body 10 may be 31mm, the diameter of the first vent hole 12 may be 5 to 6mm, and the diameter of the second vent hole may be 1.5 to 2 mm. The aperture of the first vent hole 12 and the aperture of the second vent hole 13 can be adjusted according to the size of the body 10 and the actual requirement, which is not limited in the embodiment of the present application.

In one embodiment, the end surface 111 of the welding tip 11 is convex from the outer periphery to the middle. The shape of the bulge can be adjusted according to actual needs, and the embodiment of the application does not limit the shape.

In this embodiment, by providing the end surface 111 of the welding tip 11 in a convex shape that is convex from the outer periphery to the middle, the middle of the end surface 111 of the welding tip 11 can be brought into sufficient contact with the workpiece to form an effective welding surface, so that a nugget is formed under the pressure of the effective welding surface; meanwhile, the periphery of the end surface 111 of the welding tip 11 is prevented from contacting the workpiece, thereby preventing the molten metal on the workpiece from being pressed by the periphery of the end surface 111 of the welding tip 11 and forming a convex round spot by the second through hole.

As shown in fig. 5, in one embodiment, the body 10 has a connection end 14, and the electrode 100 further includes: and a connecting rod 15 connected to the connecting end 14 via a universal joint 16. In this manner, the body 10 of the electrode 100 can be rotated in any direction, facilitating adjustment of the angle of the body 10.

In one embodiment, the electrode 100 further comprises: and one end of the air inlet pipe 17 is connected with the first vent hole 12, and the other end of the air inlet pipe is used for inputting protective gas.

In one example, the material of the inlet pipe 17 may be metal, for example, the material of the inlet pipe 17 may be copper; the material of the inlet pipe 17 may be the same as that of the body 10 of the electrode 100.

In one example, the air inlet pipe 17 and the first vent hole 12 can be welded by using an argon arc welding process, so that the electric scorching at the welding joint of the air inlet pipe 17 and the first vent hole 12 can be avoided.

In one embodiment, the shielding gas comprises an inert gas or nitrogen. Wherein, under the condition of adopting nitrogen, the welding cost can be reduced.

The embodiment of the application also provides a resistance welding machine which comprises the electrode in any one of the above embodiments. The resistance welder can be a spot welder, a projection welder, and the like.

In the present embodiment, the resistance welder may fix the electrodes by two welding arms.

In one example, one of the welding arms of a resistance welder may be used to position an electrode of an embodiment of the present application and the other welding arm may be used to position a common electrode. Therefore, the electrode of the embodiment of the application can be contacted with the outer surface (visible to a user) of the workpiece, so that the outer surface of the workpiece is prevented from generating electric scorching, and the appearance of the workpiece is ensured to be attractive; and the welding cost can be reduced by using the common counter electrode to contact with the inner surface (invisible to a user) of the workpiece.

It will be appreciated that the electrodes of the embodiments of the application may also be provided on both weld arms of the resistance welder to ensure that no electrocaloric color is produced on the inner and outer surfaces of the workpiece. The arrangement mode of the electrodes in the resistance welding machine can be adjusted according to actual needs, and the embodiment of the application does not limit the arrangement mode.

As shown in fig. 1 to 6, in one embodiment, the resistance welding machine further includes: a gas input means 200 for connecting with the first vent hole 12 of the electrode 100; and a solenoid valve 300 connected between the power source 400 and the gas inlet 200 and the electrode 100 such that the power source 400 simultaneously supplies power to the gas inlet 200 and the electrode 100 so that the gas inlet 200 and the electrode 100 can be operated simultaneously to facilitate shielding gas to protect the molten metal 21 and the adjacent area located in the area directly opposite to the end surface 111 of the welding tip 11. Wherein, the dotted line in fig. 6 indicates that the gas input means 200 is connected to the first vent hole 12 of the electrode 100 through a pipe to input the shielding gas.

In one example, the gas input device 200 may be a pressure gas cylinder, which may be connected to the gas inlet pipe 17 by a hose to input shielding gas. The pressure gas cylinder can be used for controlling the flow of the protective gas, and because the pressure gas cylinder is used for pressurizing and storing the protective gas, the temperature of the protective gas output by the pressure gas cylinder is lower than that in the external environment, and when the protective gas is output from the pressure gas cylinder, the molten metal in the area just opposite to the end face 111 of the welding end 11 and the adjacent area can be cooled.

Other configurations of the resistance welder of the above embodiments can be adopted for various technical solutions now and in the future known to those of ordinary skill in the art, and will not be described in detail herein.

In the description of the present specification, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature limited to "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly contact but through another feature in between. 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 above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present application, and these should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An electrode, comprising:

a body having a welding end;

the first vent hole is arranged on the side surface of the body and extends into the body so as to input protective gas;

and the second vent hole is arranged on the end face of the welding end and communicated with the first vent hole so as to eject the protective gas from the end face of the welding end.

2. The electrode of claim 1, wherein the second vent holes comprise at least two, the second vent holes being uniformly disposed along a circumference of the end face of the weld end.

3. The electrode of claim 2, wherein the first vent hole extends in a radial direction of the body, and the second vent hole extends from a periphery of an end face of the welding tip toward a central axis of the body.

4. The electrode of claim 1, wherein neither an end of the first vent nor an end of the second vent exceeds a central axis of the body.

5. The electrode of claim 1, wherein the first vent hole has a larger pore size than the second vent hole.

6. The electrode of claim 1, wherein the end face of the welding tip is convex from the outer periphery to the middle.

7. The electrode of claim 1, further comprising:

and one end of the air inlet pipe is connected with the first vent hole, and the other end of the air inlet pipe is used for inputting the protective gas.

8. The electrode of claim 1, wherein the body has a connecting end, the electrode further comprising:

and the connecting rod is connected with the connecting end through a universal joint.

9. The electrode of claim 1, wherein the shielding gas comprises an inert gas or nitrogen.

10. A resistance welder comprising an electrode according to any one of claims 1 to 9.

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