RU2709025C1 - Method of producing aluminum composite wires reinforced with long fiber - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building and is intended for production of long-length composite articles based on ceramic, boron or carbon fibers. In method of producing aluminum composite wires reinforced with long fiber, in which fiber from coils is pulled through furnace for thermal cleaning of fiber from opret, then fiber is evacuated in vacuum chamber, further placed in crucible with melt and ultrasonic waveguide, passed through outlet draw plate, after which finished article is wound on coil, according to invention coating is applied in bath with chemical reagent, which is sol-gel, which is installed between furnace for thermal cleaning fibers from opret and vacuum chamber next to furnace, after which coatings are dried.

EFFECT: invention improves mechanical and strength characteristics of a power transmission line core.

3 cl, 3 dwg, 2 tbl

Description

The invention relates to mechanical engineering and is intended for the manufacture of lengthy composite products based on ceramic, boron or carbon fibers.

The aluminum composite wire is designed to replace the traditionally used steel core of the steel-aluminum wire used in power lines. Compared to a conventional steel core of the same cross section, while improving the mechanical and strength characteristics, the aluminum composite core increases the throughput, which allows us to solve the problem of lack of throughput of power lines without laying new lines.

A known method in which the reinforcing core of the wire is coated with a layer of metallic conductive material of high conductivity, the core being made of a composite material with a synthetic resin matrix modified with carbon nanoclusters of the fulleroid type. As a metal conductive material of high conductivity, copper and / or aluminum or steel or their alloys with other substances can be used (RF patent No. 2387035, IPC Н01В 5/10, В82В 1/00, publ. 04/20/2010).

The disadvantage of the analogue is the low strength characteristics of the core and its complete lack of conductivity.

A known method of manufacturing a composite wire, in which the reinforcing fibers are wound from coils, impregnated with a polymer binder, wound the manufactured wire wire onto the coils of a twisting machine, twist the wire into a wire on twisting machines and winding the finished wire onto a receiving drum, while after winding the reinforcing fibers from the coils the resulting tow is pulled into a metal pipe, the tow of reinforcing fibers in the metal pipe is impregnated, the wire profile is formed, while drawing the metal pipe through the dies of the drawing mill (RF patent No. 2568188, IPC НВВ 5/04, publ. 10.11.2015).

The disadvantage of this analogue is the complete lack of conductivity of the polymer core.

Closest to the claimed invention is a method of manufacturing composite products from a metal matrix and ceramic, boron or carbon fibers, in which the reinforcing fibers are wound from coils, the fiber is thermally cleaned in a tube furnace, the purified fiber is vacuumized in a vacuum furnace, pulled through a crucible with molten matrix the metal in which the ultrasonic waveguide is located, which facilitates the penetration of the melt into the inside of the fiber, and the output die is installed when the fiber exits from glya, whereupon the finished product is wound on a spool (patent US №6485796, IPC B05D 3/00, B05D 1/18, publ. 26.11.2002).

The disadvantage of the closest analogue is that it does not provide for the application of a protective coating on the fibers to exclude chemical interaction with the molten matrix metal in one technological cycle.

The objective of the invention is to increase the bandwidth of the wires of the power line, by improving the mechanical and strength characteristics of the core.

The technical result is to improve the mechanical and strength characteristics of the core of the power line.

The problem is solved, and the technical result is achieved by the fact that in the method for producing aluminum composite wires reinforced with a long fiber, in which the fiber from the coils is pulled through the furnace for thermal cleaning of fiber from the sizing, then the fiber is vacuumized in a vacuum chamber, then placed in a crucible with with a melt and an ultrasonic waveguide, they are passed through an output die, after which the finished product is wound on a coil, unlike the closest analogue, is coated in a bath with a chemical reagent, which is a sol-gel, which is installed between the furnace for thermal cleaning of fiber from the sizing and the vacuum chamber next to the furnace, after which the coating is dried.

In addition, as a chemical reagent can be used sol-gel for coating SiO ₂ .

In addition, a sol-gel for coating TiO ₂ can be used as a chemical reagent.

An example of a specific implementation of the method

The invention is illustrated by drawings, in FIG. 1 shows a schematic diagram of an apparatus for producing aluminum composite wires reinforced with long fiber, FIG. 2 shows the dependence of the mass of carbon fiber on the annealing time at a temperature of 600 ° C of the SiO ₂ coating; FIG. Figure 3 shows the dependence of the mass of carbon fiber on the annealing time at a temperature of 600 ° С for TiO ₂ coating. The diagram shows: fiber 1, coils 2, a furnace for thermal cleaning of fiber from shedding 3, a bath with a chemical reagent 4, a furnace for drying the coating 5, a vacuum chamber 6, a crucible 7 with a molten matrix metal, a pulling mechanism 8, an ultrasonic waveguide 9, the output die 10. The finished product 11 is wound on coils 12. The furnace-vacuum tubes 13 and the vacuum-melt tubes 14 are connected in series.

The method is as follows.

Continuous ceramic boron or carbon fibers 1 are fed from coils 2 and collected in a round bundle. Next, a bundle of continuous fibers is fed into the furnace for thermal cleaning of fiber from shedding 3. Next, a protective coating is applied to the fiber in a bath with chemical reagent 4. After that, the resulting coating is dried by passing a bundle of fibers through the oven to dry the coating 5. Then, the bundle of coated fibers vacuum in a vacuum chamber 6 before introducing into the crucible 7 with a molten matrix metal. The fibers are pulled from the supply coils by the pulling mechanism 8. An ultrasonic waveguide 9 is installed in the crucible with the matrix metal melt, located in the melt near the fiber to facilitate the penetration of the melt between the fibers. The molten matrix metal of the composite product is cooled and crystallized after exiting the crucible through the outlet die 10. The finished product 11 is collected on a coil 12.

Coating SiO ₂ and TiO ₂ were deposited on a carbon fiber with two different compositions (Tables 1, 2). The coating was carried out by immersing the fibers in the prepared sol from solutions.

To assess the protective properties of the coating, heat treatment was carried out at a temperature of 600 ° C with a holding time of 1 to 6 hours. Carbon fibers were weighed on an analytical balance to assess the change in mass during annealing. The change in carbon fiber mass during the holding process is shown in FIG. 2, FIG. 3. From FIG. 2, FIG. 3 shows that the coating on the carbon fiber prevents the oxidation of the carbon fiber, thereby it can be used as a protective coating.

So, the claimed invention allows to improve the mechanical and strength characteristics of the core of the wire of the power line, thereby increasing its throughput.

Claims (3)

1. A method of producing aluminum composite wires reinforced with a long fiber, in which fiber from the coils is pulled through a furnace for thermal cleaning of fiber from a sizing, then the fiber is vacuumized in a vacuum chamber, then placed in a crucible with a melt and an ultrasonic waveguide, passed through an exit spinneret, after whereby the finished product is wound on a spool, characterized in that it is coated in a bath with a chemical agent, which is a sol-gel, which is installed between the furnace for thermal cleaning of fiber about t is determined and with a vacuum chamber next to the furnace, after which the coatings are dried. 2. The method according to p. 1, characterized in that as a chemical reagent use sol-gel for coating SiO ₂ . 3. The method according to p. 1, characterized in that as a chemical reagent use sol-gel for coating TiO ₂ .

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