JPS6264485A - Forming equipment for electrode tip - Google Patents

Abstract

PURPOSE:To perform the cutting of a tip under moderate contact pressure by arranging the cutter having a cut blade on the surface so as to locate the cut blade face at the position slightly higher than the upper face of the shaft in the state at the forming completion time and by elastically holding the shaft and cutter to the upper and lower. CONSTITUTION:The forming operation is performed by pressing the upper and lower of the center shaft 4 between tips and by moving lever 9 to the right and left. Namely, with a strong pressure of welding machine the cutter 1 squashes a rubber cylinder 5 to push it down until the end of the tip comes in contact with the shaft 4. When a lever 9 is moved to the right and left in this state, the pushed down cutter 1 performs the cutting under moderate contact pressure by pressing the cutting blade 3 to the tip surface by the elastic force part of the rubber cylinder 5. The cutting, therefore, is formed in a pin bell shape leaving the shaft 4 diameter and no cutting is performed more than the part pushed down by the cutter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an apparatus for forming the tip of a spot welding electrode tip;
In particular, it relates to a forming device that supports the powerful pressing force of a welding machine in the center and presses the cutting edge against the chip surface in an optimal state when the cutter is inserted between the chips and pressurized and cut by applying rotational force. .

The upper and lower cutters (1) are supported by a central shaft (4) with a diameter approximately equal to the welding diameter and a rubber tube (5), and are connected to the outer tube (6) via a key (7).

Also, the height of the central axis (4) is the same as the cutting edge (3) of the cutter (1).
) is slightly lower.

The molding operation is performed by applying pressure between the upper and lower chips of the central shaft (4) and moving the lever (9) left and right.

In other words, the cutter (1
) crush the rubber tube (5) so that the tip tip is aligned with the shaft (4).
) until it touches the

In other words, the tip end of the cutter (1) that is slightly pushed down is supported by the shaft (4).

When the lever (9) is moved left and right in this state, the pushed down cutter (1) presses the cutting blade (3) against the chip surface by the elastic force of the rubber tube (5), cutting under moderate contact pressure. will be done.

l-Therefore, the cutting is done in a Vimpel shape, leaving the diameter of the shaft (4), and the cutter cannot cut on the portion on which it is pushed down.

If the direction of the cutting blade is oriented in one direction, the upper and lower cutters (1) perform cutting work alternately, and the force of lateral movement is small.

Only one cutter (1) may be used.

The key (7) may be threaded.

The outer cylinder (6) may be divided into upper and lower parts, and the upper and lower parts may be reversed.

The rubber cylinder (5) may be made of a disc spring or other spring material, or may be made of liquid or air pressure.

Contrary to this figure, the shaft side may be elastically held to support the pressing force.

It is best to insulate the upper and lower cutters.

When welding a member that gets dirty easily, the tip end surface does not need to be cut if the welding diameter is made small so that the tip can easily turn over into a mushroom shape.

As described above, according to the present invention, the pressure of the electrode can be supported by the shaft, and the optimal pressure for cutting can be applied to the tip.The amount of cutting can also be automatically suppressed, and the tip end surface of the tip can be naturally shaped. The effect is great, such as being able to maintain the formed state.

[Brief explanation of drawings]

FIG. 1 is a top view of this device. Figure 2 is a longitudinal sectional view of the same. 1. Power, Tar 2. Hole 3. Cutting blade 4, shaft 5
Rubber cylinder 6. Outer tube 7 key 8. retaining ring

Claims (1)

[Claims] This device inserts a forming cutter between electrodes and pressurizes it, applying rotational force to cut and form the tip tip.It has a shaft in the center that is approximately equal to the welding diameter, a hole that slides into this shaft, and a hole on the surface. A cutter with a cutting edge is arranged so that the cutting edge is located at a position slightly higher than the upper surface of the shaft when forming is completed, and this shaft and cutter are elastically held vertically relative to each other. Molding equipment.