JP2679843B2 - Flux supply device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flux supply device used for welding.

(Prior Art) As a flux spraying device, a device described in Japanese Utility Model Laid-Open No. 60-46971 is known. This device is
This is a flux distribution device used for latent arc welding, in which a flux supply hose is arranged near the torch and the flux is distributed in a certain direction relative to the torch.

In addition, as a method of electroslag welding,
Although the electroslag welding method using a non-consumable nozzle described in Japanese Patent No. 146 is known, the flux supply in such electroslag welding in which the groove cross-sectional area does not change much causes fluctuations in the flux supply amount. On the other hand, the welding results are not significantly affected and the workers are not required to have much skill because they are relatively stable. Therefore, the current situation is that the manual spraying by the workers is necessary and automation is delayed. .

(Problems to be Solved by the Invention) By the way, Japanese Patent Application No. 63-272257 previously filed by the present applicants
As in the rail automatic welding method in No. 6, a rail that welds the first foot of the rail by the latent arc welding method, then reverses the welding nozzle and continuously welds the second and subsequent layers to the head by the electroslag welding method. Various problems arise when attempting to cope with the above-mentioned conventional technique in supplying flux in the automatic welding method.

The perspective view of the above welding condition is shown in FIG. 2 and the partial front view is shown in FIG.
Shown in the figure. The groove of the rail weld is surrounded by a fixed copper plate 1, a sliding copper plate 2, and a backing plate 3, and a non-consumable welding nozzle 5 is set in the groove and the welding nozzle 5 is installed. The welding wire 6 is fed through the groove. The welding nozzle 5 is supported by a holder 7 supported by a traversing device and a raising device (not shown), and traverses or rises in the groove. In the welding, first, the rail foot first layer is subjected to one-pass backside welding by the latent arc welding method, then the welding nozzle is reversed, and the second and subsequent layers are continuously welded by electroslag welding. During rail foot welding, the transverse width of the welding nozzle is gradually reduced according to the welding height, and when welding of the rail foot is completed, the welding nozzle is stopped at the rail center and welding of the rail abdomen is started. At this time, the sliding copper metal plate 2 that is on standby apart from the rail side faces moves in the 8 and 9 directions to become 2a, which seals the rail abdomen and the groove side face of the head to prevent leakage of slag and molten metal. As the welding nozzle rises as the welding progresses, and the molten metal reaches the rail head, the welding nozzle resumes traverse and gradually increases the traverse width to the width of the rail head. Welding is completed with an appropriate amount of extra space. During this period, the welding nozzle detects the welding current and automatically raises the wire to keep the length constant. Further, 10 is an example of a traverse rising trajectory of the tip of the welding wire.

At the time of this welding, it is necessary to add an appropriate amount of flux to the inside of the groove depending on the welding site of the rail. That is, since the groove cross-sectional area of the welded portion differs depending on the rail welded portion, the flux required amount differs depending on the rail welded portion. Therefore, there is a problem that a welding operator requires a high degree of skill to deal with it by manual spraying.

When using the above-mentioned flux distribution device, the sliding copper metal moves to attach the flux supplying hose near the welding nozzle, and when the sliding copper metal comes into close contact with the rail, the flux supplying hose interferes with the sliding copper metal hose. There is a risk that the gold will not adhere to the rail and cause leakage of slag and molten metal. If a flux supply hose is attached to the upper part of the welding nozzle in order to prevent this situation, the flux does not always drop near the welding nozzle, and rail welding work is performed outdoors, so the flux is not always scattered by the wind. There is a high risk that a proper amount will not be supplied to the weld and defects will occur in the weld.

(Means for Solving the Problem) The present invention has been made in view of the above problems, and its gist is to provide at least one or more flux feeders arranged in the vicinity of the welding nozzle and the periphery of the welding nozzle. The flux supply device is characterized in that it is configured by a flux supply unit that is arranged so as to surround it, and a tube that is attached below the flux supply unit and that is arranged so as to surround the periphery of the welding nozzle.

(Example and Action) According to the flux supply device of the example shown in the drawings,
The present invention will be described in detail. FIG. 1 is a diagram showing one embodiment of the flux supply device of the present invention. 11 is a flux feeder, 12 is a flux hopper, 13 is a flux feeder, 14 is a pipe connecting the flux feeder and the flux feeder, 15 is a tube, 16 is an outlet at the bottom of the flux feeder, and 17 is a motor. . The flux feeder 11 is the name of a mechanism section that includes the flux hopper 12 and the motor 17 and sends out the flux. Flux supply unit 13
The welding nozzle 5 penetrates the vicinity of its center so that the welding nozzle can freely move up and down, and is supported by one end of a traversing device of the welding nozzle (not shown) and traverses with the welding nozzle. Further, except for the penetrating portion of the welding nozzle and the hole through which the pipe 14 passes, it is hermetically sealed so that it is not affected by wind.
In addition, the inside of the flux supply section is hollow, and the flux stored in the flux hopper is supplied by the flux supply machine, conveyed through the pipe 14 to the inside of the flux supply section, and the portion of the portion where the welding nozzle 5 penetrates. It falls from the lower ejection port 16. Therefore, the lower ejection port 16 is larger than the outer diameter of the welding nozzle by the amount of flux passing therethrough. The pipe 14 is not particularly required if the flux supply unit and the flux supply device are brought close to each other, but the pipe 14 is preferably provided because the flux supply device can be separately installed at a position that does not hinder the work. Further, the flux feeder is supported by one end of a traversing device (not shown) of the welding nozzle 5 and traverses together with the welding nozzle, like the flux feeder. Therefore, the positional relationship between the flux supplier and the flux supplier is kept constant, and stable flux supply can be expected.

The tube 15 has an inner diameter that is larger than the outer diameter of the welding nozzle by the amount of the flux passing through, and is attached to the protrusion 16 of the flux supply section with a clip or the like so as to surround the welding nozzle 5. Therefore, the flux that has dropped from the outlet 16 of the welding supply unit can pass through the inside of the tube and be dropped near the welding position without being affected by the wind. Does not interfere.

Also, since the flux supply amount can be adjusted by controlling the rotation speed of the motor 17, it is easy to detect the welding position of the rail by the height position detection of the welding nozzle and control the flux supply amount according to the welding site. is there.

Further, if both the flux feeder 11 and the flux feeder 13 are attached to the lifting device of the welding nozzle 5, the tube 15 will rise together with the welding nozzle, so that it will not be consumed and if the material is fire resistant. There is no particular problem with metals, glass tubes, etc. However, in the above case, not only the traverse device but also the lifting device becomes large,
It is more desirable that the tube is a consumable type and that the flux feeder and the flux feeder do not rise. If the tube is a consumable type, consider the material of the tube that is retained in the weld metal as the material of the tube, and select a material that has a small amount of adhered water harmful to welding and a material that has a low content of S and P. For example, there is no particular difference between metals and glass tubes. Further, a glass tube is in a more desirable direction because there is less risk of a short circuit of an electric circuit in the welding wire, the tube, and the rail base material.

There is no particular problem as long as the number of flux feeders is one or more, and different fluxes can be used depending on the welded part of the rail, one flux for slag agent, one flux for alloying agent, etc. The use of a plurality of fluxes is more effective than the use of one flux in that the flux can be supplied by freely changing the ratio of the alloying agent depending on the filled and rail-welded portion.

When applied to rail welding using the flux supply device described above, flux was smoothly dispersed in the welded portion without being affected by wind, and smooth welding could be performed.

(Effects of the Invention) As described above, the flux supply device of the present invention exerts a great effect in successfully performing the rail welding work, and has a high industrial value. Further, although the present invention has been described with reference to the embodiment using the rail welding work that can obtain a particularly remarkable effect, it is not limited to the rail welding work in that flux can be dispersed in the vicinity of the welded portion, and a general electroslag is used. It goes without saying that it can also be applied to welding work and latent arc welding work.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the device of the present invention, and FIG.
The figure is a perspective view for explaining the rail automatic welding method, and FIG. 3 is a partial front view for explaining the rail automatic welding method. 1 …… Fixed copper metal, 2 (2a) …… Sliding copper metal, 3 …… Back metal, 4 …… Rail, 5 …… Welding nozzle, 6 …… Welding wire, 7 …… Holder, 8 , 9 ・ ・ ・ The direction of movement of the sliding copper metal, 10 ・ ・ ・ Traverse ascent of the wire tip, 11 …… Flux feeder, 12 …… Flux hopper, 13 …… Flux feeder, 14 …… Tube, 15 …… Tube, 16 …… Extrusion, 17 …… Motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Nagato 5-10-1 Fuchinobe, Sagamihara City, Kanagawa Prefectural Nippon Steel Co., Ltd. 2nd Technical Research Institute (72) Hiroshi Kashihara 5-10 Fuchinobe, Sagamihara City, Kanagawa Prefecture ―1 Nippon Steel Co., Ltd. 2nd Technical Laboratory (72) Inventor Nobuyuki Aoki 5-10-1 Fuchinobe, Sagamihara-shi, Kanagawa Shin Nippon Steel Co., Ltd. 2nd Technical Laboratory (72) Inventor Makoto Okumura Kanagawa Prefecture 5-10-1 Fuchinobe, Sagamihara-shi, Nippon Steel Corporation Second Research Laboratory (56) References JP-A-64-2779 (JP, A) Sekikai-Sho 60-46971 (JP, U) JP-B Sho-44 -24249 (JP, B1) Actual public 44-7072 (JP, Y1) Actual public 63-3741 (JP, Y2)

Claims (2)

(57) [Claims] 1. At least one disposed near a welding nozzle.
It is characterized in that it is constituted by at least one flux supplier, a flux supplier arranged so as to surround the periphery of the welding nozzle, and a tube installed below the flux supplier and arranged so as to surround the periphery of the welding nozzle. Flux supply device. 2. The flux supply device according to claim 1, wherein the flux supply device is used for rail welding.