JPH02284770A - Flux supplying device - Google Patents

Abstract

PURPOSE:To provide the flux supplying device which can spray a flux steadily to a weld zone without receiving the influence of wind at the time of welding rails by disposing a tube which encloses the circumference of a welding nozzle in the lower part of a flux supplying part disposed to enclose the circumference of the welding nozzle. CONSTITUTION:The flux stored in a flux hopper 12 is supplied by a flux supplying machine 11 and is carried through a pipe 14 into the flux supplying part 13. This flux is allowed to fall from a projecting port 16 below the part where the welding nozzle 5 penetrates. The flux falling from the projecting port 16 of the supplying part 13 can be dropped near to a welding position through the inner side of the tube 15 without receiving the influence of the wind. The tube 15 does not hinder the movement of a sliding copper backing metal 2 relative to the groove of rails 4. The flux supplying rate can be regulated by controlling the rotating speed of a motor 17 and, therefore, the welding position of the rails 4 is detected by detecting the height position of the welding nozzle 5, etc., and the flux supplying rate is easily controlled according to welding parts.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flux supply device used for welding.

(Prior Art) As a flux dispersion device, a device described in Japanese Utility Model Application No. 6046971 is known. This device is a flux dispersion device used for submerged arc welding, in which a flux supply hose is placed near a torch, and flux is spread in a certain direction relative to the torch.

In addition, as an electroslag welding method,
An electroslag welding method using a non-consumable nozzle is known, which is described in Japanese Patent No. 4146, but flux supply in electroslag welding where the groove cross-sectional area does not change much is affected by fluctuations in the flux supply machine. On the other hand, welding results are less affected and are relatively stable, so it does not require much skill on the part of the operator.
Therefore, the current situation is that workers have to manually spray, and automation is delayed.

(Problem to be solved by the invention) By the way, the patent application No. 63-272 filed earlier by the present applicant, etc.
As in the rail automatic welding method in No. 57, the rail foot layer is welded using the submerged arc welding method, then the welding nozzle is reversed and the second and subsequent layers are continuously welded up to the head using the electroslag welding method. When trying to use the above-mentioned prior art to supply flux in an automatic steel welding method, various problems arise.

A perspective view of the above welding situation is shown in FIG. 2, and a partial front view is shown in FIG. 3. The groove of the rail weld is surrounded by a fixed copper butt 1, a sliding copper butt 2, and a backing material 3, and a non-consumable welding nozzle 5 is set inside the groove. The welding wire 6 is then fed into the groove. The welding nozzle 5 is supported by a holder 7 supported by a traversing device and a lifting device (not shown) to traverse or ascend within the groove.

Welding is carried out by first welding the rail foot layer in one pass using the submerged arc welding method, and then by reversing the welding nozzle and continuously welding the second and subsequent layers by electroslag welding. When welding the rail foot, the traverse width of the welding nozzle gradually decreases in accordance with the welding height, and when the rail foot is welded, the welding nozzle stops at the center of the rail and moves on to welding the rail abdomen. At this time, the sliding copper dowels 2, which were waiting away from the side of the rail, move in the 8 and 9 directions, respectively, and seal the grooved sides of the belly and head of the rail, such as 2a, to prevent leakage of slag and molten metal. . As welding progresses, the welding nozzle rises, and when the molten metal reaches the rail head, the welding nozzle resumes its traversing, gradually increasing its traversing width until it reaches the width of the rail head, and the molten metal reaches the top of the rail head. Finish welding with a suitable excess.

During this time, the welding nozzle detects the welding current and automatically raises the wire to maintain a constant length.

Further, 10 is an example of a traverse upward trajectory of the tip of the welding wire.

During this welding, it is necessary to add an appropriate amount of flux into the groove depending on the welding location of the rail. That is, since the groove cross-sectional area of the weld differs depending on the rail welding location, the required amount of flux differs depending on the rail welding location. Therefore, there is a problem that requires a high degree of skill for a welding operator to deal with manual spraying.

In addition, when using the above-mentioned flux supply device, the sliding copper abutment moves to attach the flux supply hose near the welding nozzle, and the flux supply hose gets in the way when it comes into close contact with the rail. There is a risk that the gold will not adhere tightly to the rail, causing leakage of slag and molten metal. In addition, if the flux supply hose is attached to the top of the welding nozzle to prevent this situation, the flux will not necessarily fall near the welding nozzle, and since rail welding work is done outdoors, the flux will be dissipated by the wind and will not necessarily fall near the welding nozzle. There is a high risk that the proper amount will not be supplied to the weld and defects will occur in the weld.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned problems, and its gist is to provide at least one flux feeder disposed near a welding nozzle, A flux supply device comprising a flux supply section arranged to surround a welding nozzle, and a tube attached below the flux supply section and arranged so as to surround a welding nozzle.

(Embodiments and Effects) The present invention will be described in detail below with reference to the flux supply device of the embodiment shown in the drawings. FIG. 1 is a diagram showing one embodiment of the flux supply device of the present invention. 1) is a flux feeder, 12 is a flannox hopper, 13 is a flux feeder, 14 is a pipe connecting the flux feeder and the flux feeder, 5 is a tube, 16 is an outlet at the bottom of the flux feeder, 17 is a It's a motor. Incidentally, the Fura Nox feeder 1) is the name of a mechanical unit that feeds out flux, including a flux hopper 12 and a motor 17. The flux supply section 13 has a welding nozzle 5 near its center.
passes through the welding nozzle, allowing the welding nozzle to freely move up and down, and is supported by one end of a welding nozzle traversing device (not shown) to traverse together with the welding nozzle. Also, the penetration part of the welding nozzle and the pipe 1
The holes other than the hole 4 passes through are sealed, so they are not affected by wind. The inside of the flux supply section is hollow, and the flux stored in the flask is supplied by the flux supply machine, and the tube 14
The flux is carried into the interior of the flux supply section and falls from the ejection opening 16 below the penetrating part of the welding nozzle 5.

Therefore, the lower protrusion 16 is made larger than the outer diameter of the welding nozzle by the amount through which the flux passes. tube 14
Although this is not particularly necessary as long as the flux supply section and the flux supply machine are placed close to each other, it is desirable to provide the pipe 14 because the flux supply machine can be installed separately in a position where it does not interfere with work. Also, like the flux supply section, the flux feeder is supported by one end of a traverse device for the welding nozzle 5 (not shown) and traverses together with the welding nozzle. Therefore, the positional relationship between the flux supply machine and the flux supply section is kept constant, and a stable supply of flux can be expected.

In addition, the tube 15 has an inner diameter larger than the outer diameter of the welding nozzle by the amount through which the flux passes, and is attached to the protruding port 16 of the flux supply section with a clip or the like.
It is arranged so as to surround the welding nozzle 5. Therefore, the flux falling from the welding supply port 16 can pass through the inside of the tube and fall near the welding position without being affected by the wind. There is no hindrance.

Furthermore, since the amount of flux supplied can be adjusted by controlling the rotational speed of the motor 17, it is easy to detect the welding position of the rail by detecting the height position of the welding nozzle and control the amount of flux supplied according to the welding location. be.

In addition, if both the flux supply device 1) and the flux supply unit 13 are attached to the lifting device of the welding nozzle 5, the tube 15 will rise together with the welding nozzle, so it will not be consumed, and the material should be fire-resistant. There is no particular problem with metal, glass tubes, etc. However, in the above case, not only the traversing device but also the lifting device will be large, so it is more desirable that the tube be of a consumable type and that the flux feeder and flux feeder be of a mechanism that does not rise. If the tube is a consumable type, the material of the tube should be taken into account that the components of the tube will remain in the weld metal.
There is no difference between metal tubes, glass tubes, etc., especially if you select a tube with less adhered water that is harmful to welding, and a tube with less S and P components. In addition, a glass tube is more desirable because it reduces the risk of short circuits in the welding wire, tube, and rail base material.

In addition, there is no particular problem with the number of flux feeders as long as there is one or more, and different types of flux can be used depending on the welding part of the rail. It is more advantageous to use two or more than one in that the flux can be filled with flux and the ratio of alloying agent can be freely changed depending on the rail welding area.

When the flux supply device described above was applied to rail welding, the flux was spread smoothly over the welded area without being affected by the wind, and smooth welding could be performed.

(Effects of the Invention) As explained above, the flux supply device of the present invention exhibits a great effect for smooth rail welding work, and has high industrial value. In addition, although the present invention has been explained using rail welding work where a particularly remarkable effect can be obtained, the present invention is not limited to rail welding work in that flux can be dispersed near the welded part, and general electroslag Needless to say, it can also be applied to welding work and submerged arc welding work.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the device of the present invention;
The figure is a perspective view for explaining the automatic rail welding method, and FIG. 3 is a partial front view for explaining the automatic rail welding method. 1... Fixed copper dowel, 2 (2a)... Sliding copper dowel, 3
...Backing material, 4...Rail, 5...Welding nozzle,
6... Welding wire, 7... Holder, 8.9... Direction of movement of sliding copper fitting, 10... Traverse upward trajectory of wire tip, 1)... Puff flux feeder, 12 ... Flux hopper, 13... Flux supply section, 14.
...Pipe, 15...Tube, 16...Protrusion port,
17... Motor diagram diagram diagram diagram

Claims (2)

[Claims] (1) At least one flux supply device placed near the welding nozzle, a flux supply unit placed so as to surround the welding nozzle, and a flux supply unit installed below the flux supply unit so as to surround the welding nozzle. A flux supply device comprising arranged tubes. (2) The flux supply device according to claim (1), wherein the flux supply device is used for rail welding.