JPS6027586Y2 - spot welding equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spot welding device, and in particular, its purpose is to ensure that the spot positions of workpieces of different shapes are always perpendicular to the surface with a single spot welding gun. It is.

Some of the workpieces to be spot welded have a curved or bent shape, and it is necessary to spot weld these curved or bent parts.

Conventionally, spot welding of the above-mentioned parts has been carried out by dividing the process using a plurality of spot welding guns corresponding to each welding point position, or by using a robot or the like.

In the former case, many spot welding guns and processes are required, which poses a problem in work efficiency, and in the latter case, there is a problem in that expensive equipment costs are required.

In view of these conventional problems, the present invention is designed to reliably and efficiently perform spot welding at multiple locations on workpieces with complex shapes using a single spot welding gun with a simple structure and operation. This method solves the conventional problems by providing a device with the same characteristics.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a slide table.

A bracket 10 is attached to the bottom surface of one end of this slide table 1.
A guide roller 5 is provided via a bracket 11, and a cam follower 9 is provided on the lower surface of the other end via a bracket 11.

Further, on the upper surface of the slide table 1, a spot welding gun 2 (hereinafter simply referred to as gun 2) is supported by a pivot 3 located on the same center line as the center of the cam follower 9 so as to be tiltable in the direction of movement of the slide table 1. has been done.

The guide roller 5 is guided by a linear guide R4a provided on the guide member 4, and the cam follower 9 is guided by a cam groove 8 of a cam plate 7 arranged in parallel with the guide member 4.

Here, the shape of the cam groove 8 provided in the cam plate 7 is, for example, as shown in the figure, each spot welding point position P on the workpiece W.
The cam shape corresponds to No. 1 to P4.

6 is a motor for shifting the slide table 1, and is connected to the slide table 1 by a checker 7 or the like.

Next, the operation of the device of the present invention having the above structure will be explained.

As is clear from the diagram, the distance 1 between the center of the pivot 3 and the spot welding point by the tip of the gun 2 is
Even if you lean further, it will always remain constant.

Therefore, when welding at the spot welding point position P4, the tips of the force follower 9, the pivot 3, and the gun 2 are aligned in a straight line as shown in FIG. Can be done.

However, when the gun 2 is tilted using the pivot 3 as a fulcrum, the movement locus of the tip of the gun 2 becomes a circular arc line d with a radius centered on the pivot 3, which is the spot welding point position P1 to P3 on the workpiece W.
is not supported.

Therefore, in the case of the spot welding point position P1, the slide table 1 is shifted so that the center position of the cam follower 9 is located at the 01 position of the cam groove 8, the gun 2 is tilted about the pivot 3, and the chip is spot welded. It corresponds to the welding point P1 at a right angle to the plane.

Therefore, in the case of the spot welding point position P2, the center position of the cam follower 9 is at the 02 position of the cam groove 8, and at P3, the center position of the cam follower 9 is at the 02 position of the cam groove 8.
The slide table 1 is shifted and the gun 2 is tilted so that the following occurs.

As described above, according to the device of the present invention, by shifting the slide table and tilting the gun, spot welding can be performed reliably by always ensuring perpendicularity to the spot welding point position of a complex-shaped workpiece, and by using one gun. Since the dots are made at a plurality of locations, it is possible to improve work efficiency, and since the structure is simple, it can be provided at low cost, which has the advantage of reducing equipment costs.

[Brief explanation of the drawing]

1 and 2 are front views of the device of the present invention. 1...Slide table, 2...Spot welding gun, 3...Pivot, 4...Guide member, 4a...Guide load, 5...
Guide roller, 6...Motor, 7...
Cam plate, 8---cam groove, 9...cam follower, 10, 11...bracket.

Claims (1)

[Scope of utility model registration request] A guide roller is provided on the bottom surface of one end of the slide table via a bracket, and a cam follower is provided on the bottom surface of the other end of the slide table via a bracket, and the spot welding gun is mounted on the slide table by a pivot located on the same center line as the center of the cam follower. The slide table is supported so as to be tiltable in the moving direction, the guide roller is guided by a linear guide groove provided on the guide member, and the cam follower is provided on a cam plate disposed in parallel with the guide member. A spot welding device characterized in that the slide table is guided by a cam groove having a shape corresponding to a plurality of spot welding points based on the shape, and is shifted by a drive device.