KR20090091906A - Spatter bond prevention device of spot welding machine - Google Patents

Abstract

A device for preventing spat adhesion of a spot welder is provided to prevent the amount of a welding material, and to prevent a spat being adhered to a board by maintaining cleanness of a welding part of an upper electrode and a lower electrode. A device for preventing spat adhesion of a spot welder comprises a lower electrode(2) and an upper electrode(3). The upper electrode is installed at the top of the lower electrode. The upper electrode is elevated by an air cylinder(4). An air pipe(1) is elevated with the upper electrode. One side of the air pipe is connected with a discharge hole(6) of a solenoid valve(5). The air is discharged through the air pipe.

Description

Spatter bond prevention device of spot welding machine

The present invention relates to an apparatus for preventing spat attachment of a spot welder, and more particularly, when a nut is welded to a plate by a spot welder in the process of manufacturing various parts composed of a metal plate, a spot generated instantly by energization. An apparatus for preventing spat attachment of a spot welder configured to cool and scatter air by air so that the pad is not deposited on a sheet material.

As is well known, among the various parts for automobiles, nuts are welded to a plate, and in order to manufacture such parts, the plate and the nut are welded to each other by a spot welder.

Looking at the structure of a spot welder for manufacturing a vehicle component of the conventional type as described above, the lower electrode on the fixed side, the upper electrode on the moving side is provided in the air cylinder.

The plate and the nut are placed between the lower electrode and the upper electrode configured as described above, and the upper electrode is lowered to conduct electricity to the lower electrode to weld the plate and the nut.

Since the scattered spatter is a melt having a high temperature, some of the uncooled spat is deposited on the plate and sticks to the plate.

Then, since the quality of the manufactured parts is degraded, it is a very important task to process the spats generated during welding in the spot welder to improve the quality of the parts.

In addition, there is a case in which the nut supplied to the plate is misfeeded. Since there is no function to remove the misfeeded nut, when the nut is close to or overlapped with the weld formed by the lower electrode and the upper electrode, the cause of welding failure is caused. There is a problem such that it can not be used as a product, eventually providing a cause for raising the manufacturing cost of the parts.

Spot attachment prevention device of the spot welding machine according to the present invention for solving the above problems by cooling or blowing the spat generated in the process of spot welding the plate and nut by air, so that the spat does not stick to the plate In addition, even when the nut supplied to the plate is misfeeded, the unfeeded nut can be blown by air to solve the cause of the welding defect that occurs when the conventional nut approaches or overlaps the weld formed by the lower electrode and the upper electrode. As a result, it is desired to provide a spatter preventing device for spot welders, which can make products of higher quality since the welded part can be made more clean.

The spot attachment prevention device of the spot welder of the present invention for achieving the above object is to install the air discharge port side of the air pipe body on the upper electrode repeating the falling and rising to weld the plate and nut placed between the lower electrode and the upper electrode And, the other side of the air pipe is connected to the air cylinder is discharged from the air cylinder to the upper electrode when the air cylinder finishes the welding mission to return to the upper electrode to quickly cool the spats generated during welding or spatter and miss feed Characterized in that configured to blow off the nut.

According to the apparatus for preventing spat attachment of spot welders as described above, when welding the nut to the plate using air discharged when the upper electrode rises during the spot welding of the plate and the nut, it is instantaneously generated by electric current. By blowing the spatter or cooling the spatter to prevent the spat from being welded to the plate, the weld can produce a clean part,

In addition, since the missed nut can also be blown away, it is an invention having many advantages, such that the cause of the welding failure can be solved by solving the problem that the nut overlaps the welding portion formed by the lower electrode and the upper electrode.

1 is a perspective view showing a schematic configuration of a spot welder according to the present invention

Figure 2 shows an operating state according to the present invention, an illustration of a state just before the upper electrode is lowered

Figure 3 shows an operating state according to the present invention, an illustration of a state immediately before the upper electrode rises

4 is an illustration of a state in which air is discharged while the upper electrode is lowered and welded and ascended

*** Description of the symbols for the main parts of the drawings ***

1: air tube

2: lower electrode

3: upper electrode

4: air cylinder

5: directional valve

6: outlet

Hereinafter, with reference to the accompanying drawings in detail an example of a preferred configuration for the anti-spatting device of the spot welder as follows.

1 is a perspective view showing a schematic configuration of a spot welder according to the present invention, Figure 2 shows an operating state according to the present invention, an exemplary view of a state immediately before the upper electrode is lowered, Figure 3 is an operating state according to the present invention As shown, an example of the state immediately before the upper electrode is raised, Figure 4 is an illustration of the air discharged while the upper electrode is lowered to weld and ascend.

Spot adhesion prevention device of the spot welding machine according to the present invention,

Air intermittently goes to one side of the upper electrode 3 which is repeatedly lowered and raised by the air cylinder 4 to weld the plate and nut placed between the lower electrode 2 and the upper electrode 3 constituting the spot welder. The discharge port side of the air pipe body (1) is installed so as to be supplied to the upper and lower parts as configured to the lower electrode 3,

On the other side of the air pipe 1, the air discharged by the action of the air cylinder 4 when the upper electrode 3 finishes the welding mission by the air cylinder 4 and returns (rises), the air pipe 1 It is configured to be connected to the outlet 6 of the direction switching valve (5) to be discharged to the periphery of the upper electrode (3) through.

In the drawings, reference numeral 100 denotes a panel, 101 denotes a nut for welding to the panel, and 102 denotes a spat.

Look at in detail the effect of the spot welding machine according to the present invention on the spat adhesion prevention device.

The spot attachment prevention device of the spot welder according to the present invention supplies the plate material 100 and the nut 101 between the lower electrode 2 and the upper electrode 3 constituting the spot welder.

In addition, in order to weld the nut 101 to the plate 100, the upper electrode 3 is lowered by the action of the air cylinder 4 so that the plate 100, the nut 101, and the lower electrode 2 are energized. As a result, the plate 100 and the nut 101 are welded.

In this way, the upper electrode finishes the welding task and the upper electrode 3 rises by the action of the air cylinder 4, and the air discharged from the air cylinder 4 from the rising point is discharged from the direction switching valve 5. Through 6 and the air pipe 1 is discharged to the periphery of the upper electrode (3).

As described above, when the air discharged from the time when the upper electrode 3 rises after the completion of the welding mission is discharged to the periphery of the upper electrode 3, the spat generated during welding can be cooled or blown away. Since it is possible to prevent the welding to the plate material, and also miss feed the nut can be blown to act to prevent the overlapping of the nut welded by the lower electrode and the upper electrode.

The spot attachment prevention device of such a spot welder can be applied to all spot welders in which spats occur during spot welding, in addition to welding plate and nuts.

Claims (1)

In the spot welding machine composed of the upper electrode 3 which is lowered by the air cylinder 4 on the upper part of the lower electrode 2, The discharge port side of the air pipe body 1 is provided to move up and down like the upper electrode 3, and the other side of the air pipe body 1 is completed by the air cylinder 4, and the upper electrode 3 finishes the welding task. Spat of the spot welder, characterized in that configured to be connected to the outlet 6 of the direction switching valve (5) so that the air discharged at the time of rise is discharged to the periphery of the upper electrode (3) through the air pipe (1) Anti-sticking device.