JPH05305482A - Manufacture of composite welded wire - Google Patents

Abstract

PURPOSE:To raise the quantitative supply capability of powder and eliminate the component change of the powder by sending with a high pressure inactive gas the powder such as flux which is contained together with an inactive gas and sealing it in the hollow part of a wire material of a bag-shaped metal foil. CONSTITUTION:The inactive gas 5 is flowed from the supply means 5 of the inactive gas, the inside of a hopper 3 and that of a supply path 7 are made an inactive gas atmosphere, and the powder 2 such as the flux and an added component is supplied into the hopper 3. The powder 2 inside the hopper 3 is stored in a state not in contact with the air. The open end of the wire material 4 is brought into contact with the supply path 7, and a valve 10 is opened. The powder 2 is fallen from the powder exit 6 of the hopper 3 to the side of the supply path 7, carried to the side of the wire material 4 by means of a carrier gas G (inert gas) flowing from a gas flow rate regulating valve 11, and filled into the wire material 4 successively from the tip end side of the wire material 4. At this time, the gas flow rate regulating valve 11 is adjusted by the flow rate of the carrier gas G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a composite welding wire used for overlay welding of cylinder heads.

[0002]

2. Description of the Related Art A composite welding wire used for build-up welding of a cylinder head is formed by filling a hollow portion of a metal wire such as mild steel with powder such as flux and additive components.

As a conventional method for manufacturing this composite welding wire, as shown in FIG. 3, first, a wire material formed into a U-shaped cross section, which is an outer skin, is charged with powder such as flux and additive components by a hopper or a screw method. After directly supplying it with a powder supply device such as a feeder or a vibration feeder, the wire material is rolled by a top or the like to wrap the powder such as flux and additive components, and wound around a winding drum or the like. It is manufactured.

[0004]

By the way, in the above-mentioned conventional manufacturing method, powder is supplied onto the wire material,
When this was made into a wire shape, the powder sometimes spilled down, resulting in variations in quantitativeness. Further, in order to wire a wire material formed in a U-shaped cross section, a large number of rollers such as a feeding roller and a forming roller are required, so that the forming is complicated and the wire is twisted during forming. However, it was not easy to manufacture. In addition, since the powder was in contact with the atmosphere on the wire material, the composition of the powder sometimes changed due to being oxidized by oxygen and moisture in the air.

Therefore, the present invention has been devised in order to effectively solve these problems, and its purpose is to facilitate the production and to provide a high quantitative feedability of the powder, and to prepare the powder for the production. It is intended to provide a method for producing a composite welding wire with almost no change in body composition.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is a method in which powders such as flux and additive components contained together with an inert gas in a hopper are transported by a high pressure inert gas. Is enclosed in a hollow portion of a wire material made of a bag-shaped metal foil.

[0007]

As described above, according to the present invention, the powder such as the flux and the added components contained in the hopper together with the inert gas is transferred from the end of the wire material made of the bag-shaped metal foil to the hollow part of the wire material. A composite welding wire can be manufactured by pneumatically feeding by a high pressure inert gas. At this time, since the powder is filled in the wire material without touching the air, there is no change in components such as oxidation, and the powder is quantitatively packed regardless of the size or particle size distribution of the powder. Therefore, a good wire can be obtained. Furthermore, since the manufacturing process of the present invention is simpler than the conventional method,
Manufacturing efficiency is high.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of an apparatus 1 for manufacturing a composite welding wire according to the present invention. As shown in the figure, this manufacturing apparatus 1 includes a hopper 3 for containing powders 2 such as flux and additive components, a wire material 4 formed in a bag shape, and an inert gas G such as He, Ar and CO _2. And an inert gas supply means 5 for supplying the gas, and a supply path 7 for connecting the wire material 4, the powder outlet 6 of the hopper 3 and the inert gas supply means 5, respectively.

The powder 2 such as flux and additive components is
For example, SiO ₂ , MnO, CaO, Al ₂ O ₃ , Mg
O, CaF _{2 and the} like as the main components, usually these raw materials are heated and melted at 1300 ° C. or higher to obtain a uniform composition, cooled and pulverized, and various particle size distributions are adjusted according to the purpose of use. Is.

Further, as shown in FIG. 2, the wire material 4 is obtained by heating and melting both ends of a metal foil such as a commercially available aluminum foil and adhering it to form a bag shape (tube shape). Is opened to introduce the powder 2, and the other end 4b is closed to prevent the powder 2 introduced from flowing out.

The gas inlet 8 connected to the powder outlet 6 of the hopper 3 and the inert gas supply means 5 is provided with valves 9 and 10 for feeding the powder 2 inside the hopper 3 to the inert gas supply means. It is sealed together with the inert gas supplied from No. 5.

The inert gas supply means 5 is He, Ar, CO
It is a commercially available gas cylinder or the like in which an inert gas G such as ₂ is enclosed, and high-pressure inert gas G is pressure-fed to the gas inlet 8 and the supply passage 7 of the hopper 3, respectively.

Next, the operation of this embodiment will be described.

As shown in FIG. 1, first, the gas flow rate adjusting valve 11 provided at the connection between the valve 9 of the hopper 3 and the supply passage 7 and the inert gas supply means 5 is opened to remove the inert gas supply means 5. After the inert gas G is flown and the inside of the hopper 3 and the supply path 7 is replaced with the inert gas G to make an inert gas atmosphere, the powder 2 is fed into the hopper 3 from a powder supply port (not shown).
To supply. As a result, the powder 2 in the hopper 3 is stored in a state where it does not come into contact with air, so that the powder 2 is stored in a good state without any component change such as oxidation.

Next, the wire material 4 wound in a coil shape
When the valve 10 is opened after the open end 4a of the hopper 3 is connected to the supply path 7, the powder 2 in the hopper 3 falls from the powder outlet 6 of the hopper 3 to the supply path 7 side as shown in FIG. The carrier gas G (inert gas) flowing from the regulating valve 11 is carried to the wire material 4 side, and the wire material 4 is sequentially filled from the tip 4b side. At this time, the flow rate (pressure) of the carrier gas G (inert gas) is easily achieved by adjusting the gas flow rate adjusting valve 11, and is adjusted to an unnecessarily high gas pressure, for example, to the extent that the wire material 4 is not broken. can do. Also,
Since the powder 2 is sent by air, the particle size distribution does not vary. Further, since the wire material 4 is wound in a coil shape, air does not enter the inside, and work such as evacuation is unnecessary.

When the wire material 4 having a predetermined length is completely filled, the gas flow rate adjusting valve 11 is closed to stop the flow of the carrier gas G, and the wire material 4 is removed from the supply path 7. A composite welding wire can be obtained. In addition, since the composite welding wire obtained has an extremely small proportion of wire material, it is only necessary to pay attention to the composition of the powder when performing overlay welding, etc., and the effect on the composition change of the base metal to be overlayed. Will be very few.

As described above, according to the present invention, since the powder 2 filled in the wire material 4 is carried by pneumatically feeding the inert gas, a large number of rollers and a wide space as in the conventional manufacturing method are not required. , Can be easily manufactured. Also,
The powder 2 filled in the wire material 4 is always in an inert gas atmosphere and is not exposed to air.
Oxygen and moisture in the air prevent changes in components such as oxidation, and a high quality composite welding wire can be obtained. Further, since the wire material 4 is formed of metal foil, it is lightweight and compact, and can be easily stored and transported.

Needless to say, the particle size, density, composition of the powder, the film thickness of the wire material 4, and the gas pressure of the carrier gas can be appropriately changed according to the required composite welding wire.

[0020]

As described above, according to the present invention, the manufacturing cost can be reduced because the manufacturing method is relatively simple and does not require a large-scale device or a large space as compared with the conventional manufacturing method. The economy can be improved, and the change in components in the manufacturing process can be extremely reduced, so that the deterioration of quality can be prevented. Further, since the powder is filled by gas transportation, it exhibits excellent effects such as small variation in particle size distribution and excellent quantitative supply property.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a schematic view showing an example of a wire material according to the present invention.

FIG. 3 is an explanatory view showing an example of a conventional method for manufacturing a composite welding wire.

[Explanation of symbols]

 2 Powder 3 Hopper 4 Wire material G Inert gas

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Ishiyama Inventor, Isawa Chuo, Fujisawa City, Kanagawa Prefecture 8 Isuzu Central Research Institute (72) Inventor, Budoo, Isawa Chuo, Fujisawa City, Kanagawa Prefecture 8 Inside the laboratory (72) Inventor Yuji Matsunami 8 Tsutana, Fujisawa City, Kanagawa Prefecture Isuzu Central Research Institute (72) Inventor Harue Sugisaki 8th soil shelf, Fujisawa, Kanagawa Prefecture Isuzu Central Laboratory (72) Invention Akira Tsujimura 8 Tsutana, Fujisawa City, Kanagawa Prefecture, Isuzu Central Research Institute

Claims (1)

[Claims] 1. A powder of flux, an additive component, etc. contained in an hopper together with an inert gas is fed by a high pressure inert gas, and the powder is enclosed in a hollow portion of a wire material made of a bag-shaped metal foil. A method for manufacturing a composite welding wire, which is characterized in that