JPS5856066Y2 - Flat butt double welding machine in steel strip connection processing line - Google Patents

Description

[Detailed Description of the Invention] In the present invention, one of the two movable electrodes provided adjacent to the front and rear of one fixed electrode and the fixed electrode are arbitrarily selected as a pair in a welding machine. This article relates to the structure of a flashpad double welding machine that can be used in a continuous copper strip processing line.

Conventionally, when steel strips, that is, copper strips, are manufactured on a continuous production line, in order to increase and extend the longitudinal dimension of the steel strips,
A flash butt welder is used.

In this case, the flash butt welding machine uses a fixed electrode that clamps (grips) the material to be welded (steel strip, etc.) and a movable electrode that face each other at a position where the fixed steel strip and movable steel strip can butt against each other at the welding position so that welding can be performed. A pair of fixed electrodes and a moving electrode are arranged facing each other.

The fixed electrodes are fixed on a fixed platform, and the moving electrodes can be moved toward and away from the fixed electrodes with the moving platform for flushing and upset.

The carriage is connected to a conventional fluid cylinder.

In this way, the conventional flash butt welding machine for continuous processing of copper strips, which consists of one set of welding machines with one fixed pole and one moving pole, has the advantage of being able to weld in a short time with high output current. was recognized as its characteristic, and its use was widely used.

However, in this conventional flash butt welding machine, the inner surfaces of opposing surfaces of a pair of opposing electrodes deteriorate due to adhesion of sparks and deformation due to strong pressure, often resulting in defective welding.

For this reason, both electrodes must be replaced at the same time, and even if the fixed electrode can be used, if the movable electrode becomes defective, both electrodes must be replaced at the same time, and this electrode replacement takes a long time. Therefore, the operating time of the steel strip production line is
For this reason, the amount was greatly reduced and became a major negative factor in the production of steel strips.

As a result of various studies aimed at improving these conventional plush butt welding machines with drawbacks, the present inventor discovered the flash butt double welding machine of the present invention, and succeeded in improving the above drawbacks.

In this invention, movable electrodes are provided on both sides of the fixed electrode, and as mentioned above, the opposing electrodes of both the fixed and movable electrodes used in the past have roughened electrode surfaces due to spark adhesion and strong pressure during upset. Even if it becomes unusable, one set of flash butt welding machine can be constructed using the opposite side of the fixed electrode that had not been used until then and a new movable electrode facing the fixed electrode on the opposite side. However, it can be used simply by relocating it without making any additional changes.

An embodiment of the present invention will be described with reference to a flash butt double welding machine in a copper strip continuous processing line shown in the figure.

In the figure, AC power is received from a power source 1, and the required voltage and current are adjusted by a controller 2 and a transformer 3.

On this welding machine table 4, a plurality of electrodes such as a moving electrode 5, a fixed electrode 6, and a spare moving electrode 5a are mounted on the central axis 11 of the steel strip 7.
The movable electrode 5, the fixed electrode 6, and the spare movable electrode 5a are disposed in parallel on the conveying line in common, and the movable electrode 5, the fixed electrode 6, and the spare movable electrode 5a are arranged in a straight line so as to sandwich the fixed electrode 6 from the front and back. .

A clamp mechanism 8 is provided in each of these electrodes to electrically and mechanically hold the steel strip 7 from above and below.

The moving electrodes 5 and 5a are placed on a moving carriage 9.

The moving carriage 9 is connected to a conventional fluid cylinder 10.

Therefore, each movable cart 9 can be made to approach the fixed base 11 of the fixed electrode 6.

In this way, the end faces of the steel strips 7 can be butted against each other.

According to the present invention, the moving electrode 5 and the fixed electrode 6 are initially used, and the spare moving electrode 5a is not used.

That is, the clamping mechanism 8° of the spare moving electrode 5a is held open so that the steel strip can freely pass over the conveyance line.

The electrode end surfaces 51 and 61 of both electrodes are welded many times.
When the movable electrode 5 is worn out or deteriorated, the previously used movable electrode 5 is released from use, and the spare movable electrode 5a is used in the same manner as described above.

Since the counter electrode surface at this time is still in a new state, it is possible to sufficiently perform the same welding as before.

In this way, according to the present invention, the manufacturing process of the copper strip can be continued without interruption, and there is no loss due to process stoppage.

Similarly, by arranging multiple sets of these three electrodes as one unit on a line, it becomes possible to continuously process a large amount of steel strip over a long period of time without replacing the electrodes. Process interruption losses due to electrode breakage can be completely prevented.

In the present invention, by combining and arranging the above-mentioned double-arranged fixed electrode and moving electrode, it is possible to provide dedicated welding equipment for each size of copper strip, and copper strips with stable quality can be produced on a regular basis. Therefore, the steel strip manufacturing capacity can be greatly improved by greatly reducing the time required for electrode replacement.

In particular, for thin steel strips (thickness 3 mm or less), the electrode life can be improved by nearly three times, making a significant contribution to steel strip manufacturing technology.

In this way, the present invention can be applied not only to steel strip manufacturing, but also to wire manufacturing lines, pipe manufacturing lines, pickling lines, plating lines, etc., and similar effects can be achieved.

[Brief explanation of the drawing]

The figure is a schematic side view of a flash butt welding machine showing one embodiment of the present invention. 1... AC power supply, 2... Controller, 3... Transformer,
4... Welding machine stand, 5... Moving electrode, 6... Fixed electrode, 5a... Spare moving electrode, 7... Copper band, 8: Clamp mechanism, 9: Moving trolley, 11: Fixed stand, 21.22
...Moveable platform.

Claims (1)

[Scope of utility model registration request] In a flash butt welding machine in which the material to be welded is gripped by a welding electrode so that it can be energized and welded, the electrode is a moving electrode,
A plurality of electrodes, such as fixed electrodes, moving electrodes, and stationary electrodes, are sequentially and alternately placed on the conveyance line of the material to be welded. 1. A flash butt double welding machine for a strip steel connection processing line, characterized in that an arbitrary set of welding electrodes is formed by one of the moving electrodes adjacent to both sides of the electrode.