JP3063946B2 - Manufacturing method of metal stranded wire - Google Patents

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 metal stranded wire such as a copper or copper alloy stranded wire used for an electric wire or a steel stranded wire used for a steel cord of a tire.

[0002]

2. Description of the Related Art Several types of twisted wires are in practical use. For example, twisted wires having relatively small strand diameters, such as electric equipment wiring wires and power cords, are often used in twisted wires. A collective twisting method is adopted in which strands to be matched are bundled, twisted, and twisted.

There are two types of collective twisting methods, single bunch twisting and double bunch twisting, but since the principle is the same, a single bunch twisting mechanism having a simpler mechanism will be described below. Of course, the present invention can be applied to both single bunch twisting and double bunch twisting.

FIG. 3 is a schematic explanatory view of a single-bunch twisting machine. In the drawing, 1 is a wire supply reel on which a wire A is wound, 11 is an eye plate, 12 is an assembly die, and 13 is a fryer driven by a motor 14 to rotate. Reference numeral 15 denotes a take-up reel for winding the stranded wire B, which is connected to a motor 14 via a transmission 16 and rotates synchronously with the rotation of the flyer 13 to wind the stranded wire B. 17 is stranded wire B and reel 15
This is a traverser that moves the reel 15 left and right so that the reel 15 is uniformly wound.

[0005] First, the wires A drawn from the wire supply reel 1 are bundled by the collecting dies 12 through the perforated plate 11 and enter the stranded wire machine. This wire bundle is largely bent at the point C in the drawing, passes through the arm of the fryer 13 and takes up the reel 15
It is wound up. During this time, the wire bundle is twisted once at the point C every time the flyer 13 makes one rotation. The above is the outline of the single bunch twisting method.

[0006] In this stranded wire system, the conventional strand A is shown in FIG.
In the method shown in (a) or (b), the wire is fed from the wire supply reel 1. That is, in FIG. 2 (a), the reel 1 is rotated to draw out the strand A through the guide 5, and FIG.
In (b), the reel 1 is kept stationary and is
At this time, the wire A is passed through a brake brush 2 for preventing the wire A from being excessively unraveled.

[0007]

According to the above-described collective twisting according to the conventional method, the bundle of strands is twisted at the point B in FIG. 3 to form a stranded wire. At the same time, each strand has the same number of twists. Only twisted. If the strand is made of a highly extensible metal, the twist of the strand is absorbed by the strand in the form of plastic deformation, and poses no practical problem.

However, even when the strand is a brittle metal or is not brittle, the twist pitch is small (the number of twists per unit length is large), and accordingly, the strand is twisted many times, or When the wire diameter is small and it is vulnerable to twisting,
In some cases, twisting cannot be tolerated.In these cases, the strand may break during stranded wire, resulting in poor productivity and product yield, and in some cases, stranded wire processing may not be possible. .

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a method for manufacturing a metal stranded wire which solves the above-mentioned problems, reduces wire breakage during stranded wire, and improves productivity and product yield. The feature is that in the production of metal stranded wires by the collective twist method, the reels that supply the strands are driven and rotated in the same direction as the stranding direction with the reel axis as the axis, and the strands are reeled. It is to draw in the direction of extension of the shaft and supply it to the twisting machine. At this time, the winding direction of the wire around the reel is
Direction of rotation of the reel
The drive speed is in the range of 0.5 to 1.5 times the speed of the twisting machine.
Preferably.

[0010]

FIG. 1 is an explanatory view of a specific example of a method for manufacturing a metal stranded wire according to the present invention. Although the figure shows one strand, the same means is actually taken for all strands. In the drawings, 1 is a strand supply reel, and 2 is a brake brush provided on a flange side edge of the reel to prevent the strand from being excessively unraveled, and is made of horsetail hair, nylon filament or the like. Reference numeral 3 denotes a motor, and 4 denotes a turntable which is directly connected to and rotated by the motor 3, and one reel is placed thereon and fixed. Reference numeral 5 denotes a guide formed of a roll or a ring, which is located on an extension of the rotation axis of the reel 1.

A is a strand, and the strand supply reel 1 is twisted by the motor 3 and the turntable 4 in the same direction as the twisting direction of the twisting machine (in the direction to reduce the twist given to the strand by the twisting machine). The wire is pulled out through the guide 5 and supplied to the twisting machine while being rotated at substantially the same rotation speed as the rotation speed of the wire machine (the rotation speed of the fryer in FIG. 3).

[0012]

As described above, a twisted wire is formed by twisting the bundle of wires at the point C in FIG. 3. At this time, the wire bundle is twisted, and the number of twists is also applied to each wire. The same number of twists is given. This twist is ultimately absorbed by the plastic deformation of the strand, but when the strand is brittle, etc., it cannot withstand the twist and breaks.

However, as a result of detailed observation near the point C in FIG. 3, the following has become clear. That is, at the point C in FIG. 3, the wire bundle is twisted into a stranded wire and the strand is also twisted, but the twist added to the strand A is not absorbed by the strand at the point C, Proceeding toward the supply reel 1 in FIG. After that, twisting is continuously applied, and when a certain limit is exceeded, the strand A is plastically deformed by the twist and absorbs the twist.

Therefore, by applying the same number of twists as the number of twists applied to the strand at the point C by rotating the strand supply reel 1 in a direction in which the twist of the strand is eliminated or reduced,
The twisted wire can be formed without giving the wire a distortion due to unnecessary twist. At this time, in order to eliminate the tangling of the wires drawn from the reel, it is desirable that the winding direction of the wires on the reel is opposite to the driving rotation direction of the reel. Also, the driving speed of the reel is 0.
More preferably, it is in the range of 5 times to 1.5 times.

[0015]

[Prototype example]

Prototype example 1: Double 7 tinned annealed copper wires with a wire diameter of 0.03 mm.
Twisting was performed using a bunch twisting machine. Twisted pitch is 1mm, and the number of turns of the stranding machine is 1500rpm. When the strand supply reel is rotated and when the strand is not rotated, a 60km strand is manufactured, and the strand break occurs several times during that time. Was investigated. The method in which the reel is not rotated is the method shown in FIG. 2B, and the method in which the reel is rotated is the method shown in FIG. 1, and the rotation speed of the reel is 1500 rpm.

Trial Production Example 2: Tinned annealed copper wire 7 having a wire diameter of 0.04 mm
The book was twisted using a single bunch twisting machine. The twist pitch is 1 mm, the number of revolutions of the twisting machine is 2500 rpm, and when the strand supply reel is rotated and when the strand is not rotated, a 60 km strand is manufactured, and the number of times the strand breaks during that time investigated. Fig. 2 shows a system that does not rotate the reel.
According to (b), the method of rotating the reel is the method shown in FIG. 1, and the rotation speed of the reel is 2500 rpm.

Prototype Example 3: Seven hard nickel-plated copper alloy wires having a wire diameter of 0.035 mm were twisted using a double-bunch twisting machine. Twist pitch is 0.95mm, the number of rotations of the twisting machine is 1700rpm, 60km of stranded wire is manufactured for each of the case where the wire supply reel is rotated and the case where it is not rotated. investigated. The method of not rotating the reel is shown in FIG. 2 (b), and the method of rotating the reel is the method shown in FIG. 1, and the rotation speed of the reel is 1700 rpm.

The results of the above investigation are shown in Table 1,
The effect of the present invention in which the wire supply reel is driven to rotate to eliminate or reduce the twist given to the wire at the time of twisting is remarkable.

[0019]

[Table 1]

[0020]

As described above, according to the method for producing a metal stranded wire of the present invention, twisting applied to the strand during twisting is eliminated or reduced, and breakage of the strand during twisting is reduced. ,
It is effective for improving productivity and product yield. In addition, a brittle metal wire twisted wire, which has conventionally been difficult due to the occurrence of disconnection, can be formed by the collective twisting method with high productivity.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a specific example of a method for manufacturing a metal stranded wire of the present invention.

FIGS. 2A and 2B are explanatory views of a conventional manufacturing method.

FIG. 3 is a schematic explanatory view of a single bunch twisting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Element supply reel 2 Brake brush 3 Motor 4 Turntable 5 Guide A Element

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Claims (3)

(57) [Claims] In a production of a metal twisted wire by a collective twisting method in which a wire to be twisted is bundled and twisted collectively and turned into a twisted wire, each reel supplying the wire is twisted around a reel shaft. A method for manufacturing a metal stranded wire, wherein the wire is drawn in the direction of the extension of the reel shaft while being driven and rotated in the same direction as the direction, and supplied to a stranded wire machine. 2. The method for manufacturing a metal stranded wire according to claim 1, wherein the winding direction of the strand on the reel is opposite to the driving rotation direction of the reel. 3. The rotation speed of the reel is determined by the rotation speed of the twisting machine.
2. The method according to claim 1, wherein the distance is in the range of 0.5 to 1.5 times.
A method for producing a metal stranded wire according to the above.