JPH07105761A - Manufacture of fiber-reinforced composite wire - Google Patents

Abstract

PURPOSE:To provide a long-size fiber-reinforced composite wire having structure satisfactory as a transmission line by passing the core wire of a preform wire, composed of a long-size fiber and aluminum or aluminum alloy, through the molten metal of aluminum or aluminum alloy. CONSTITUTION:One or more preform wire 3 to be adopted as a core wire is supplied from a wire supply source 7. This preform wire 3 is composed of long-size fiber and aluminum or alminum alloy to be introduced into a molten metal tank 1 having a heater 2 via the given arrangement-shape insertion hole 4 of a nipple 5 to be continuously passed to the molten metal of alminum or aluminum alloy stored in this molten metal tank 1. This preform wire 3 is stranded into a wire bundle having a given diameter by a guide 8 having a given inner diameter (d) arranged in the molten metal, and also is coated with the molten metal. Then the coated wire bundle is passed through an outlet side die 9 to adjust adherent molten metal quantity to obtain a long-size fiber- reinforced composite wire 6 having a given shape composite part 6a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-reinforced composite wire.

[0002]

2. Description of the Related Art There have been several known methods for manufacturing a composite wire for a power transmission line, and a fiber-reinforced method has already been used. As a method of reinforcing with this fiber, JP-A-2-181303
In this method, a short fiber dispersion material produced by dispersing and solidifying short fibers for reinforcement in aluminum is added to a molten aluminum at the position of a casting gap, and this molten metal is added. Is continuously cast and rolled as a composite wire by the belt-and-wheel method.

Further, as a general method for producing a composite material, (1) a diffusion bonding method in which fibers and a matrix are diffusion-bonded by superposing a metal foil or a thin plate and fibers and applying pressure at high temperature by hot pressing, (2) High-pressure casting method in which molten metal is permeated between aligned fiber bundles and cast at high pressure, (3) Melt infiltration method in which fiber bundles are continuously pulled up or pulled down to form a composite. There is.

[0004]

By the way, in the above-described method for manufacturing a composite wire, it may be difficult to continuously manufacture a composite wire having a structure satisfying as a power transmission line.

That is, in the case of the continuous casting method using the belt-and-wheel method, it is possible to manufacture an element wire by rolling and drawing an ingot composed of short fibers, but in the case of combining long fibers. However, rolling and drawing are difficult due to the fact that the fibers hardly stretch.

In the case of the diffusion bonding method using a hot press or the high-pressure casting method, it is effective when compounding short fibers or short fibers, but it is difficult to continuously compound long fibers (about 1000 m). Is.

In the case of the melt-penetration method in which a fiber bundle is passed through a molten metal and continuously compounded, the number of filaments of the fiber (the number of fibers in one bundle) is limited to a certain range, and because of the manufacturing method. However, it is only possible to obtain a wire with a small wire diameter (approximately φ0.5) and a constant structure. Further, since the strands are manufactured by squeezing with a die, the fibers may be exposed on the surface and may be damaged.

The present invention has been made in view of the above circumstances, and an object thereof is to manufacture a fiber-reinforced composite wire which is reinforced by long silicon carbide fibers and has a structure satisfying as a power transmission line. To provide a method.

[0009]

In order to achieve the above-mentioned object, the present invention uses one or more preform wires made of long fibers and aluminum or aluminum alloy as a core wire, which is made of aluminum or aluminum alloy. The composite wire is manufactured by continuously passing it through the molten metal and coating it with aluminum or an aluminum alloy.

Further, a plurality of preformed wires made of long fibers and aluminum or aluminum alloy is used as a core wire, and the core wire is passed through the molten metal of aluminum or aluminum alloy and the diameter of the wire bundle provided in the molten metal is reduced. A composite wire is manufactured by passing through a guide and coating with aluminum or an aluminum alloy.

Further, one or a plurality of preformed wires made of long fibers and aluminum or an aluminum alloy is used as a core wire, which is coated with aluminum or an aluminum alloy through two molten metal tanks of the aluminum or aluminum alloy to form a composite wire. Is manufactured.

Furthermore, a plurality of preform wires made of long fibers and aluminum or aluminum alloy are used as core wires,
This is passed through a first molten metal tank of aluminum or aluminum alloy to remelt a plurality of preformed wires to be integrated, and then this is passed through a second molten metal tank and covered with aluminum or aluminum alloy to form a composite. It is for producing wires.

[0013]

[Function] By continuously passing the preform wire through the molten metal and coating it with aluminum or an aluminum alloy, the wire (composite part) is composed of fibers and Al, so that the aluminum of the wire itself melts with the outer layer of aluminum. Since it is partially integrated, aluminum easily adheres to the outer circumference of the wire, and a composite wire having a structure in which the composite part is the center and aluminum is the outer layer is manufactured. This structure is a structure that makes it easy to preform a stranded wire during the manufacturing process. Therefore, it is possible to obtain a fiber-reinforced composite wire which is reinforced with long fibers and has a structure which is satisfactory as a power transmission line.

Further, when the core wire is passed through the molten metal, the plurality of wires can be more surely arranged at the center by passing through the guide.

Further, by passing the core wire through the two molten metal tanks, it becomes possible to manufacture a composite wire having a structure in which the shape of the wire and the shape of the aluminum of the outer layer are arbitrarily changed.

Furthermore, a plurality of preformed wires are passed through the first molten metal tank to be remelted and integrated, and thereafter,
By passing this through the second molten metal tank, the diameter of the wire bundle in the central portion becomes smaller. That is, the diameter of the composite portion of the fiber and Al, which is the central portion, is reduced, the thickness of the aluminum of the outer layer can be increased, and preforming becomes easier.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing an example of an apparatus for producing a composite wire by a dip forming method for carrying out the method for producing a fiber-reinforced composite wire of the present invention.

In FIG. 1, reference numeral 1 denotes a molten metal tank made of aluminum or an aluminum alloy. The molten metal tank 1 is formed, for example, in a cylindrical shape, and a heater 2 for controlling the melting temperature of aluminum is arranged outside.

At the center of the lower part of the molten metal tank 1, there are as many insertion holes 4 as the number of composite preform wires 3 (for example, 7).
Is provided with a nipple 5.

The insertion hole 4 of the nipple 5 is arbitrarily arranged according to the shape of the composite portion 6a of the composite wire 6 to be manufactured (for example, when manufacturing the composite wire 6 as shown in FIGS. 2 and 3). Is formed so that a plurality of wires are parallel to each other as they pass through the insertion holes 4 with one in the middle and six at intervals of 60 °. Preform wires 3 made of the long SiC fiber from 7 and aluminum or aluminum alloy are inserted one by one.

A guide 8 for squeezing the bundle of inserted wires 3 to an arbitrary diameter is provided in the center of the molten metal tank 1. The inner diameter d of the guide 8 is the central portion (composite portion) of the composite wire 6. It has the same size as the diameter of 6a. That is, by arbitrarily changing the inner diameter d of the guide 8, the composite portion 6a having a desired diameter can be obtained.
It is possible to manufacture the composite wire 6 having

Further, in the central portion of the molten metal surface in the molten metal tank 1,
A die 9 having a predetermined inner diameter (the same diameter as the outer diameter of the desired composite wire 6) for covering the composite portion 6a with a certain thickness of aluminum is provided and pulled out from the wire supply source 7. The plurality of preform wires 3 have respective nipples 5
After passing through the insertion hole 4 into the molten metal tank 1 and being squeezed to a predetermined diameter by the guide 8, the outside is covered with aluminum through the die 9 to form the final element wire (composite wire 6). It is designed to reach the surface.

Now, in order to obtain the composite wire 6, first, a long Si
Preform wire consisting of C fiber and aluminum or aluminum alloy (for example, preform wire with an outer diameter of 0.5 mm) 3
From the wire supply source 7 and pull out the nipple 5 respectively.
Insert one into each of the insertion holes 4 of. The number of the wires 3 can be arbitrarily set to obtain a desired fiber volume ratio, and is 7 in this embodiment. The wire 3 inserted through the insertion hole 4 is attached so as to pass through the guide 8 and then the die 9.

Then, the aluminum in the molten metal tank 1 is filled with, for example, 680
Wire 3 which is attached while being heated to ~ 700 ° C to melt
Is pulled out from the die 9 continuously.

As a result, the aluminum enters the inside of the molten metal tank 1 through the insertion hole 4 of the nipple 5, and the outer side of the preform wire 3 through the guide 8 and the die 9 becomes the final strand (composite wire 6). Up to the surface of the bath. At this time, the guide 8
As shown in FIG. 2, the composite wire 6 having the outer diameter d ₁ of the composite portion 6a and the aluminum coating thickness t ₁ can be obtained by using the material having the inner diameter d ₁ . Further, by using a inner diameter d ₂ as a guide 8, as shown in FIG. 3, the outer diameter of the composite part 6a composite wire 6 of d ₂ is obtained.

As described above, the dip forming method is applied using the molten metal tank 1, and the preformed wire 3 is continuously passed through the molten metal and covered with aluminum, so that the wire 3 (composite portion 6a) becomes a fiber. Since the wire itself is made of Al, the outer circumference of the aluminum of the wire itself is melted and partially integrated with the covering aluminum that serves as an outer layer. A composite wire 6 having an outer layer structure (for example, a composite wire having an outer diameter of 2.4 mm and a fiber volume ratio of 12% and a high aluminum filling rate) is continuously manufactured. Since aluminum is arranged in the outer layer, the composite wire 6 is a preform during the manufacturing process of the stranded wire or the like (processing for preventing the dispersion).
Can be achieved by plastic deformation of the outer layer of aluminum. Therefore, the fiber-reinforced composite wire 6 reinforced by the long silicon carbide fiber and having a structure satisfying as a power transmission line 6
Will be obtained.

When passing the plurality of wires 3 through the molten metal,
By passing the guide 8, the plurality of wires 3 can be more reliably arranged at the center of the composite wire 6. Since the inner diameter of the guide 8 is the same as the outer diameter of the composite portion 6a of the composite wire 6, it is possible to manufacture the composite wire 6 having the composite portion 6a having a desired diameter by arbitrarily changing the inner diameter. Becomes As a result, the outer diameter of the composite portion 6a is a very important parameter in terms of bending rigidity (easiness of bending) in the twisting process, and the optimum diameter can be selected according to the wire design. Further, the thickness of the outer layer of aluminum can be adjusted to some extent by changing the inner diameter of the die 9. Furthermore, by exchanging the die 9 with one having a different inner diameter, the composite wire 6 having an arbitrary outer diameter can be manufactured.

Further, the insertion hole 4 for the wire 3 of the nipple 5
By providing each wire for each wire, it becomes easy to fill the space between the wires 3 with aluminum. That is, the plurality of wires 3
According to the arrangement of the insertion holes 4 of the nipple 5, they are supplied into the molten metal after a predetermined distance from each other, so that the aluminum is sufficiently permeated between the wires 3. Therefore, when the composite wire 6 as shown in FIG. 3 is manufactured, aluminum is filled between the wires 3 without any gap, and the outer circumference of the aluminum of the wire 3 itself is melted with the aluminum for coating to form an outer layer. Since the parts are integrated, the composite wire 6 coated with aluminum with high adhesion strength can be manufactured.

Therefore, as a power transmission line, weight reduction, sag reduction,
It is possible to continuously manufacture the fiber-reinforced composite wire 6 that can be expected to have an increased capacity.

FIG. 4 is a diagram showing another example of the composite wire manufacturing apparatus by the dip forming method for carrying out the fiber-reinforced composite wire manufacturing method of the present invention.

In FIG. 4, reference numeral 10 denotes a molten metal tank of aluminum or aluminum alloy, and a heater 11 for melting aluminum or aluminum alloy is arranged in the molten metal tank 10.

Nozzles 12 and 13 are provided in upper and lower two stages on the side of the molten metal tank 10 below the molten metal surface.
2 and 13 are substantially provided with two molten metal tanks. Each of the nozzles 12 and 13 is provided with thermometers 14 and 15 for measuring the temperature of the molten metal in the nozzles 12 and 13, and the melting temperature in the nozzles is determined based on the thermometers 14 and 15. The heaters 16 and 17 are controlled so as to be maintained at the above temperature.

As shown in FIGS. 4 and 5, the lower nozzle 13, which is the first molten metal tank, has a plurality of preformed wires 3.
Is a unit to integrate the bundles of aluminum, and the melting temperature at which the aluminum in the wire 3 may melt to some extent (eg 680-700 ° C)
It is maintained by the heater 17. The lower part of the lower nozzle 13 is formed so as to be movable along the longitudinal direction of the wire 3 so that the immersion distance h of the wire 3 can be changed, and has the same number of insertion holes as the number of composite preform wires 3. A lower nipple 19 having 18 is provided. The preform wires 3 made of the long SiC fiber from the wire supply source 7 and aluminum or aluminum alloy are inserted into the insertion holes 18 of the lower nipple 19 one by one. On the upper part of the lower nozzle 13, the outer diameter of the wire bundle (the outer diameter d when a plurality of wires are bundled as shown in FIG. 8 is
₃ ) A lower die 20 having a smaller inner diameter d ₄ is provided.

As shown in FIGS. 4 and 6, the nozzle 12 in the upper stage, which is the second molten metal tank, has a constant thickness (for example, in the case of manufacturing the composite wire shown in FIG. 7) on the wire 21 integrated by the nozzle 13 in the lower stage. Is coated with aluminum at t ₂ ). Since the coating is performed by solidification, the immersion time and the molten metal temperature (for example, 670 to 680 ° C.) that do not melt are maintained. A nipple (upper nipple) 22 that is movable along the longitudinal direction of the wire 3 so that the immersion distance of the wire 21 can be changed is provided in the lower portion of the upper nozzle 12, and an integrated wire is provided in the upper portion. A die (upper die) 23 having an inner diameter d ₅ larger than the outer diameter of 21 is provided.

The lower nipple 19, the lower die 20,
The upper nipple 22 and the upper die 23 are linearly arranged, and an inert gas is supplied between the lower and upper nozzles 13 and 12 (between the lower die 20 and the upper nipple 22) to be inert. An inert gas passage 24 that provides a gas atmosphere is provided.

In the apparatus for manufacturing this composite wire, two nozzles were provided on the side of one molten metal tank to form two molten metal tanks, but two separate molten metal tanks were used. Good.

Now, for example, a composite wire 25 as shown in FIG.
To obtain, first, the number of preformed wires 3 made of long SiC fiber and aluminum or aluminum alloy and having a predetermined diameter (for example, outer diameter 0.5 mm) set to obtain a desired fiber volume ratio (for example, (For example, 13) In this mounting, the plurality of wires 3 are inserted into the insertion holes 18 of the lower nipple 19 one by one. Then, the lower die 20, the inert gas passage 2
4, so that it can be pulled out through the upper nipple 22 and the upper die 23.

After that, the aluminum in the molten metal tank 10 is heated and melted, and the temperature of the molten metal in the lower nozzle 13 is adjusted to, for example, 680 to 680.
The temperature of the molten metal in the upper nozzle 12 is maintained at, for example, 670 to 680 ° C. while keeping the temperature at 700 ° C., and the attached wire 3 is continuously pulled out from the upper die 23.

As a result, the plurality of preformed wires 3 from the wire supply source 7 enter the lower nozzle 13 from the lower nipple 19, pass through the nozzle 13 and reach the lower die 20, and the bundle of the plurality of wires 3 is integrated. The formed strand (wire 21) is manufactured. At this time, as the lower die 23,
By using a die having an inner diameter d ₄ smaller than the outer diameter d ₃ of the wire bundle, there is no gap between the wires, so that an integrated strand with improved strength can be manufactured.

The integrated wire 21 is used for the lower die 20.
From the upper nipple 22 into the upper nozzle 12 through the inert gas passage 24 in the inert atmosphere. Then, it passes through the inside of the nozzle 12 to reach the upper die 23, the outside of which is covered with aluminum of a predetermined thickness t ₂ , and becomes the final strand (composite wire 25) as shown in FIG. For example, if the temperature of the molten metal in the lower nozzle 13 is 680-70
0 ° C, melt temperature p in the upper nozzle 12 670-680 ° C,
By setting the immersion distance in the lower nozzle 13 to 20 mm, a composite wire with an outer diameter of 2.0 mm and a fiber volume ratio of 17% can be manufactured.

As described above, the preform wire 3 is continuously passed through the molten metal and coated with aluminum or an aluminum alloy by using the manufacturing apparatus by the dip forming method having the two different molten metal tanks (nozzles 12 and 13). Therefore, since the outer circumference of the wire itself is fused with the aluminum for coating which is the outer layer and partially integrated, the aluminum adheres to the outer circumference of the wire 3 with high adhesion strength, and the composite part is the center and the aluminum is the outer layer structure. The composite wire 25 is continuously manufactured. Therefore, it is possible to obtain the fiber-reinforced composite wire 25 that is reinforced by the long silicon carbide fiber and has a structure satisfying as a power transmission line.

Further, since the plurality of wires 3 are integrated through the lower nozzle 13, the diameter of the composite portion (wire bundle) becomes small. That is, if the plurality of wires 3 are simply bundled, the outer diameter of the wire bundle becomes d _{3 as} shown in FIG. 8, but by integrating the wire bundles, the outer diameter of the wire bundle becomes as shown in FIG. It can be reduced, and therefore thicker and the accompanying thickness of the aluminum outer layer then also t ₃ to t _2, the preform during twisted wire becomes easier.

Further, the number of wires 3, the nipple 19,
By changing 22 and the dies 20 and 23, it becomes possible to manufacture a composite wire having an arbitrary fiber volume ratio and outer diameter.

Therefore, as a power transmission line, weight reduction, low sag,
It is possible to continuously manufacture the fiber-reinforced composite wire 25 that can be expected to have an increased capacity.

Further, by using the above-mentioned two composite wire manufacturing apparatus, the applicant previously proposed FIG. 9 and FIG.
The composite wire 30 shown in FIG. 0 can be manufactured. As shown in the figure, the composite wire 30 includes an aluminum or aluminum alloy aluminum layer 34 on the outer periphery of a central composite wire 33 having a long silicon carbide fiber 31 at the center and short fibers or whiskers 32 arranged on the outer circumference thereof. It is a composite line with the center line 3
By passing 3 through the molten metal of aluminum from the nipple of the manufacturing apparatus, it becomes possible to coat the outer periphery with aluminum.

[0047]

In summary, according to the present invention, the following effects can be obtained.

(1) Since the preform wire is continuously passed through the molten metal and covered with aluminum or an aluminum alloy, a fiber-reinforced composite wire having a structure such that a preform during a manufacturing process such as a twisted wire is easy can be obtained. .

(2) When a plurality of preformed wires are passed through the molten metal, they are passed through the guide, so that the composite portion composed of the plurality of wires can be more surely arranged in the center.

(3) By passing the preformed wire through the two molten metal tanks, it is possible to manufacture a composite wire having a structure in which the shape of the wire and the shape of the aluminum of the outer layer are arbitrarily changed.

(4) A plurality of preformed wires are passed through the first molten metal tank to be remelted and integrated, and then passed through the second molten metal tank to reduce the diameter of the composite part (center part). It is possible to obtain a fiber-reinforced composite wire having a structure that can be made small and the thickness of the aluminum of the outer layer can be made large, and that can be preformed more easily.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of an apparatus for manufacturing a composite wire for carrying out the method of the present invention.

FIG. 2 is a cross-sectional view showing an example of a composite wire.

FIG. 3 is a cross-sectional view showing another example of a composite wire.

FIG. 4 is a schematic cross-sectional view showing another example of a composite wire manufacturing apparatus for carrying out the method of the present invention.

5 is a cross-sectional view showing a state of a lower nozzle of the manufacturing apparatus shown in FIG.

6 is a cross-sectional view showing a state of an upper nozzle of the manufacturing apparatus shown in FIG.

FIG. 7 is a cross-sectional view showing another example of a composite wire.

FIG. 8 is a cross-sectional view showing another example of a composite wire.

FIG. 9 is a cross section of a composite wire previously proposed by the applicant.

10 is a cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

 1 Molten bath 3 Preform wire 6 Composite wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiromitsu Kuroda 5-1-1 Hidaka-cho, Hitachi-shi, Ibaraki Prefecture Hitachi Cable Power Systems Laboratories (72) Inventor Hiroshi Kubokawa 5 Hidaka-cho, Hitachi-shi, Ibaraki 1-1-1 Hitachi Cable Co., Ltd. Power Systems Research Center

Claims (4)

[Claims] 1. A preformed wire comprising a long fiber and aluminum or an aluminum alloy, which is used as a core wire, or a plurality of core wires, which are continuously passed through a molten aluminum or aluminum alloy and coated with the aluminum or aluminum alloy. A method for producing a fiber-reinforced composite wire, which comprises producing a composite wire. 2. A plurality of preformed wires made of long fibers and aluminum or aluminum alloy are used as core wires, which are passed through a molten metal of aluminum or aluminum alloy and the diameter of a wire bundle provided in the molten metal is reduced. A method of manufacturing a fiber-reinforced composite wire, which comprises manufacturing a composite wire by passing through a guide and coating with aluminum or an aluminum alloy. 3. A composite wire comprising one or a plurality of preformed wires made of long fibers and aluminum or aluminum alloy as a core wire, which is coated with aluminum or aluminum alloy through two molten metal tanks of aluminum or aluminum alloy. A method for producing a fiber-reinforced composite wire, which comprises: 4. A plurality of preform wires made of long fibers and aluminum or aluminum alloy is used as a core wire, which is passed through a first molten metal tank of aluminum or aluminum alloy to remelt the plurality of preform wires. The method for producing a fiber-reinforced composite wire is characterized in that the composite wire is manufactured by unifying the composite wire and then passing through a second molten metal tank and coating the composite wire with aluminum or an aluminum alloy.