JPS6031029Y2 - spot welding equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spot welding device, and its purpose is to integrate the clamp positioning mechanism of the workpiece with the gun body in a direct-acting Spora T [7 contact gun] to simplify the structure and save equipment space. By reducing the size of the ball, it became possible to hit points in small pitches.

Conventionally, in a spot welding device using a direct-acting spot welding gun, when positioning a workpiece by clamping, the clamp positioning device was installed parallel to and separately from the spot welding gun.

This conventional apparatus will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a spot welding gun, which is a direct-acting spot welding gun equipped with a fixed electrode 2 and a movable electrode 4 on a gun arm that moves forward and backward.

5 is a secondary wire connected to the gun arm 3 on the movable electrode 4 side.

On the other hand, a clamp positioning device 6 for a workpiece W, which is separately installed in parallel with the spot welding gun 1, is composed of a fixed receiving piece 7 and a movable pressing arm 8 that is rotated by a cylinder 9, and is configured to press the receiving piece 7 and It has a structure in which the workpiece W is held and positioned by the arm 8.

In this case, since the spot welding gun 1 and the clamp positioning device 6 are installed side by side, a large installation space 1 is required between the two, and when the end of the workpiece is reached, the clamp positioning device 6 cannot function and the There was a problem with not being able to score points on pitches.

Furthermore, the clamp positioning device 6 itself, which is placed separately, requires equipment costs, and the configuration is complicated by the addition of ancillary equipment such as fluid pressure piping equipment to the cylinder 9 and a control device, which requires expensive equipment costs.

In addition, the clamp positioning portion of the workpiece W is located far away from the spot welding point with the spot welding gun, and there is a drawback that reliable positioning action is lacking.

The present invention is an improved structure that eliminates all of the above-mentioned conventional drawbacks, and examples thereof will be described below with reference to FIGS. 4 to 6.

1 is a direct-acting spot welding gun, 2 is a fixed electrode,
4 is provided on a gun arm 3 that moves forward and backward with a movable electrode.

In the present invention, in such a well-known spot welding gun 1, receiving pieces 10 which come into contact with the workpiece W are provided on both sides of the fixed electrode 2.

In addition, the secondary wire attachment part is on the same side of both electrodes, eliminating the conventional secondary wire 5 connected to the gun arm 3 side, and making it possible to attach the ounce copper plate 11 to the fixed electrode 2 side. 5
This is aimed at reducing power consumption by reducing the impedance and the problem caused by the disconnection of the a.

Since the present invention has the above-mentioned structure, the receiving pieces 10 provided on both sides of the fixed electrode 2 come into contact with one side of the workpiece W in the vicinity of the hitting point position.

Then, due to the pressurizing operation of the movable electrode 4, the workpiece W is clamped and positioned between the receiving piece 10 and spot welded at the same time.

As described above, according to the device of the present invention, there is no need to separately install a clamp positioning device for the workpiece in parallel with the spot welding gun, so the space 11 becomes a small space only the width of the spot welding gun body, and it is possible to make a dot in a small pitch. At the same time, the clamp positioning part becomes the closest position to the welding point position, so that positioning can be reliably obtained and spot welding can be performed correctly at a predetermined position.

Furthermore, the clamp positioning operation of the workpiece is performed by the spot welding gun's own dot-point operation, and unlike conventional methods, a dedicated cylinder is not required, which saves energy and simplifies equipment, leading to cost savings. can get.

[Brief explanation of drawings]

Fig. 1 is a plan view of the conventional device, Fig. 2 is a side view of the clamp positioning device, Fig. 3 is a side view of the spot welding gun, Fig. 4 is a side view of the device of the present invention, Fig. 5 is a plan view, FIG. 6 is a perspective view of essential parts. 1... spot welding gun, 2... fixed electrode, 3... gun arm, 4... movable electrode, 10... receiving piece.

Claims (1)

[Scope of utility model registration request] A spot welding device characterized in that a receiving piece is provided on the fixed electrode side of a direct-acting spot welding gun for clamping a workpiece with the pressing force of the movable electrode when the movable electrode performs a dotting point operation.