JPS5930418A - Manufacture of eccentric compound metallic wire - Google Patents

Abstract

PURPOSE:To manufacture an eccentric compound metallic wire formed by coating a core with metal of different kinds while stabilizing the position of the core and causing no breaking of the core, by providing a die with a hole different from an extrusion hole wherein the core is run eccentrically, and running the metal of different kind therein simultaneously. CONSTITUTION:The die 2 of an extruder is provided with >=1 hole 4 different from the extrusion hole 3 near the hole 2. The core 1 of metal having high deformation resistance such as iron is run eccentrically through the extrusion hole 3 from a nipple 7 and billets 5a and 5b of different metals, such as Al, having lower deformation resistance than said core 1 are introduced from a supply opening 9 and extruded by rams 8a and 8b from said extrusion hole 3 and different hole 4 simultaneously. Consequently, the flow of the different metal in the extrusion hole 3 is made to uniform, and while the position of the core 1 is stabilized, the eccentric compound metallic wire of stable quality coated with the metal of different kinds is manufactured efficiently without causing the breaking of the core 1.

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing an eccentric composite metal wire (1),
This stabilizes the position of the special C two-core wire and prevents the core wire from breaking.

In general, as composite wires in which the core wire is coated with different metals, there are transport wire-trolley wires, aluminum stabilized superconducting wires, etc., and the core wire 12 is made of metal 1 with high deformation resistance, such as iron,
Steel, stainless steel, Fe-Ni alloy.

Copper, copper alloys, and superconducting materials such as NbTi, Nb58n, and VsOa are used, and the dissimilar metals used to cover these materials are those with excellent negative resistance and conductivity.

The coating method involves supplying the core wire to the extrusion die hole.

Since a method of extruding and coating dissimilar metals through a die hole is used, the dissimilar metal to be coated must have a deformation resistance lower than that of the core wire, and materials that meet this requirement are usually AI, Sn, :pb or an alloy thereof is used.

Conventionally, the extrusion coating method described above has been known as a method for manufacturing composite metal wires, but in all of these methods, the core wire is located at the center of the cross section. In some cases, such as C nitrolyte wires and aluminum stabilized superconducting wires, eccentric composite metal wires in which the core wire is deviated from the center of the cross section are required, but the extrusion coating method described above is It was not suitable for manufacturing core composite metal wire. That is, in the conventional extrusion coating method, there were problems such as the position of the core wire being unstable and the C double-core wire breaking during extrusion coating.

In view of this, as a result of various studies, the present invention has been developed to stabilize the position of the core wire without installing incidental equipment that requires two people other than the extruder, and to prevent the eccentricity of the wire from being broken during extrusion coating. A method for manufacturing a composite metal wire has been developed, in which the outer circumference C2 of the core wire is eccentrically passed through the extrusion hole of the die by an extruder, the method C2 of extrusion coating different metals, the vicinity C2 of the extrusion hole of the die, The present invention is characterized in that one or more holes other than the extrusion holes are provided to simultaneously extrude different metals through nucleation, thereby making the flow ft of the different metals in the extrusion holes uniform.

1. The present invention is shown in Fig. 1 C. A die hole (2) through which the core wire (1) is eccentrically passed through the die (2) of the extruded wire (2).
A hole (4) separate from the die hole (3) is provided in the vicinity of 3), and dissimilar metals are simultaneously extruded from the nucleation (4). The shape of the dissimilar metals around the core wire (1) is not limited to a rectangular shape, but may be any shape such as a round shape, an ellipse shape, or a polygonal shape. In addition, the position of the hole (4) is located near C, which is the smaller of the left and right cross-sectional areas of the core wire (1) in the cross section of the extrusion hole (3), and the cross-sectional area of the hole (4) is the same as the smaller cross-sectional area. It is desirable that the sum of C2 be approximately 0.2 to 1.8 times the cross-sectional area of the larger one. Of course, the shape of the composite material may require holes (4) with a different cross-sectional area.

The number of holes (4) is usually one, but two or more holes may be provided in order to slightly embrittle the flow of metal. The hole (4) is provided in the direction where the core wire (11) is desired to be eccentric as described above, and another hole for finely adjusting the flow of metal may be provided at another position (two holes).The extrusion hole (3) and the hole ( 4) The interval varies depending on the monthly die, but within the range of 1 strength ≦ 2 that will not be damaged by extrusion pressure,
It is desirable to bifurcate as close as possible.

Hereinafter, the present invention will be described in detail with reference to examples.

Example + 1,500 pieces of NbTi superconducting wire with a target diameter of 50 μm were assembled, and the outer periphery was coated with high-purity copper. Width: 3. After polishing and degreasing the surface of the core material, a wire with a thickness of 2°C and a thickness of 2°C was coated with pure If99.99 on its outer periphery while maintaining C2 in argon gas.
An aluminum stabilized superheavy conductor wire coated with 7wt% high-purity aluminum by extrusion and having a width of 12mm and a thickness of 4 fins, with the C-binary wire (1) eccentric by 2.8mm from the center as shown in Figure 2. was manufactured.

The extrusion coating is made using a barrel filled with heated aluminum billets (5a) (5b) as shown in the 3rd symbol (2).
6), and one wall C in the middle in the axial direction thereof has a two-core wire fi
Insert the nipple (7) and the die (21) on the wall of the extension.
This was carried out using an extruder equipped with a pair of opposing rams (8a) and (8b) that move forward and backward in two axial directions within one barrel (6).

The core wire (1) is inserted through the nipple (7) and passed through the extruder through the die (21) and the extrusion hole (2.8 mm from the center of the extrusion hole (31).
The die (2) has a width of 4 mm and a length of 12 m1.
11 extrusion holes (3) and a hole (4) with a diameter of 4 yn was provided 2.4 m away from the eccentric side of the core wire (1) of the extrusion hole (3). 5 times like this, the billet inside the barrel (6))
The inlet (5b) is compressed by a pair of opposed rams (8a inlet (8b)) toward both sides of the core wire that traverses the inside of the extruder, and the extrusion hole (3
) to coat the core wire (it).

The core wire m was fed only from the rear, that is, from the nipple (7), without applying any forward biasing force from the front of the extruder, that is, from the die (2) side. Billet (5a1 (5b)
The supply is from both ends of the barrel (6) (the figure shows only one side).
[Two supply ports (9) were provided, and when the rams (8a) and (8b) were retracted, two supply ports were supplied. In addition, in the figure (1), there is a hole (4) in the die (2) that is separate from the extrusion hole (3).
Shows an aluminum bar extruded from.

The composite state of the aluminum stabilized superheavy wire produced in this way was investigated. As a result, the bondability is excellent,
No fluctuation or breakage of the core wire was expected.

For comparison, a hole (4) was prepared separately from the extrusion hole (3).
When the core wire (11) was closed and extrusion coated, the displacement of the core wire (11) was large and breakage was introduced, and a good bond could not be obtained.

Example (2) As shown in Fig. 4, a steel strip with a width of 2 o 1 MR and a thickness of 3 mm is used as the core wire (1), and the cross-sectional area is An aluminum-steel strip composite trolley wire of 640 mrl (aluminum cross-sectional area of 580 md) was manufactured.

For extrusion coating, a dual extruder (Figure 3C) is used, and a die (2
), as shown in Figure 5 (2) (three ■-shaped extrusion holes (1) with a cross-sectional area of 640 mrA and a hole (4') with a width of 7 mm and a length of 241 DI are provided at a position 5 degrees away from the upper side of the I shape, Example (1)
In the same manner as above, the core wire (1) was made eccentric to a depth of 0.5 m from the three upper sides of the Ig extrusion hole (3) of the die (2), and the aluminum was extruded and coated.As a result, the fluctuation and cutting of the core wire A composite trolley wire with no damage and in good composite condition was folded.

Although extrusion coating was carried out using a horizontally opposed ram type extruder, a vertical or horizontal unidirectional ram type extruder may also be used.

Although we have explained an example using the dice shown in Figures 1 and 5, if we use the binary dice shown in Figure 6 (ql~(el + f2 can be manufactured.

Furthermore, according to the present invention, as for equipment C2, it is only necessary to replace only the die of the conventional extruder for manufacturing composite wire, and variation and breakage of the core wire of the composite wire can be prevented.
This has a significant practical effect.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a die used in method 1 of the present invention, and FIG. 2 is a sectional view showing an example of an aluminum stabilized superconducting wire manufactured by method 32 of the present invention. Fig. 3 is a horizontal sectional view showing an example of an extruder using the method of the present invention - Fig. 4 is a cross-sectional view showing an example of an aluminum-steel strip composite trolley wire manufactured by method ζ of the present invention; FIG. 4 is a plan view showing an example of a die for extrusion coating of a trolley wire, and FIGS. 6 tal to tel are all plan views of other dies used in the method of the present invention. 1. Core wire 2 Die 3.3' Extrusion hole 4.4'
Hole 5a5b billet 6 barrel 7. Nipple 8a
, 8b ram 9 billet supply port Fig. 6 (0) (b) 4' (6)

Claims (1)

[Claims] A core wire outer periphery C that eccentrically passes through an extrusion hole of a die by an extruder.
2. Method C2 for extrusion coating of dissimilar metals. 2. Near the extrusion hole of the chair (2. One hole different from the extrusion hole)
A method for manufacturing an eccentric composite metal wire, characterized in that the flow of dissimilar metals in the extrusion hole is made uniform by simultaneously extruding C1 dissimilar metals from the hole by providing an L hole.