JPH0737455A - Manufacture of stranded metal wire - Google Patents

Abstract

PURPOSE:To improve productivity and production yield by rotating a reel axis in a desired direction while drawing an element wire in a specific direction to feed it to a wire strander when a stranded metal wire is to be formed by a collective stranding method. CONSTITUTION:An element wire feed reel 1 provided with a brake brush 2 is rotated and driven by a motor 3 in the same direction as that of a stranded wire with the axis of the reel 1 serving as its axis. In this condition, an element wire A is drawn in the extended direction of the axis of the reel 1 to feed the wire A to a wire strander. The stranding added to the element wire at the time of wire stranding is thus mitigated. Generation of discontinuity is reduced drastically, and the productivity and the production yield are improved.

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 metal twisted wires such as copper or copper alloy twisted wires used for electric wires and steel twisted wires used for steel cords of tires.

[0002]

2. Description of the Related Art Although some methods have been put to practical use for twisted wires, in many cases, twisted wires are often used in the manufacture of twisted wires with a relatively small strand diameter, such as wires for electric equipment and power cords. A collective twisting method is used in which the wires to be matched are twisted into a twisted wire.

There are two types of collective twisting methods, single bunch twisting and double bunch twisting. However, since they are the same in principle, the mechanism will be described as single bunch twisting. It goes without saying that 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 around which a wire A is wound, 11 is an eye plate, 12 is an assembly die, and 13 is a flyer which is driven by a motor 14 to rotate. A winding reel 15 for winding the twisted wire B is connected to the motor 14 via the transmission 16, and rotates in synchronization with the rotation of the fryer 13 in a fixed relationship to wind the twisted wire B. 17 is stranded wire B is reel 15
It is a traverser that moves the reel 15 left and right so that the reel 15 is evenly wound.

First, the strands A drawn from the strand supply reel 1 pass through the eye plate 11 and are bundled by the assembly die 12 to enter the stranding machine. This wire bundle is largely bent at point C in the figure and passes through the arm of the fryer 13 and the take-up reel 15
To be wound up. During this time, the wire bundle is twisted once at the point C every time the fryer 13 makes one rotation. The above is the outline of the single bunch twisting method.

In this twisted wire system, the conventional strand A is shown in FIG.
The wire was reeled out from the wire supply reel 1 by the method shown in (a) or (b). That is, in FIG. 2A, it is a method of rotating the reel 1 to pull out the wire A through the guide 5.
In (b), the reel 1 is left stationary and is not rotated.
Is performed by passing through the brake brush 2 for preventing the strand A from being excessively wound and unraveled.

[0007]

In the collective twisting according to the above-mentioned conventional method, the bundle of strands is twisted at the point B in FIG. 3 to form a twisted wire, but at the same time, each strand has the same number of twists. Only twisted. When the strand is made of a metal having a high ductility, the twist of the strand is absorbed by the strand in the form of plastic deformation and does not pose a practical problem.

However, when the wire is a brittle metal, or when the wire is not brittle, the twist pitch is small (the number of twists per unit length is large), and the number of twists of the wire is large, or For example, if the wire diameter is thin,
In some cases, it cannot withstand twisting, and in these cases the strands may break during twisting, resulting in poor productivity and product yield, and in some cases twisting may not be possible. .

[0009]

DISCLOSURE OF THE INVENTION The present invention provides a method for producing a metal twisted wire which solves the above-mentioned problems, reduces the breakage of strands during twisting, and improves the productivity and the yield of products. The feature is that in the production of metal twisted wire by the collective twisting method, each reel that supplies the wire is driven and rotated around the reel axis in the same direction as the twisted wire The purpose is to pull out in the direction of the extension line of the shaft and supply it to the twisting machine.

[0010]

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

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

[0012]

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

However, as a result of detailed observation in the vicinity of point C in FIG. 3, the following became clear. That is, at the point C in FIG. 3, the wire bundle is twisted to become a twisted wire, and at the same time, the strand is also twisted, but the twist added to the strand A is not absorbed by the strand at the point C, It advances toward the supply reel 1 of FIG. 3, and is distributed between the point C and the supply reel 1. After that, twisting continues to be applied, and when a certain limit is exceeded, the wire A plastically deforms with respect to twisting and absorbs the twisting.

Therefore, by rotating the strand supply reel 1 in the same direction as the number of twists applied to the strand at point C in the direction in which the twist of the strand is eliminated or alleviated,
It is possible to twist the strands without giving unnecessary strain to the strands. At this time, in order to eliminate the entanglement of the strands drawn out from the reel, it is desirable that the winding direction of the strands around the reel is opposite to the drive rotation direction of the reel.

[0015]

[Prototype example]

Prototype example 1: Double 7 tin-plated annealed copper wires with a wire diameter of 0.03 mm
It was twisted using a bunch twisting machine. The twisting pitch is 1 mm, the number of rotations of the twisting machine is 1500 r.pm, and 60 km of twisted wire is manufactured for each of the case where the wire supply reel is rotated and the case where it is not rotated. I investigated what I did. The method in which the reel is not rotated is the method shown in FIG. 2B, 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.

Prototype Example 2: Tin-plated annealed copper wire 7 having a wire diameter of 0.04 mm
The book was twisted using a single bunch twisting machine. The twisting pitch is 1 mm, the number of rotations of the twisting machine is 2500 rpm, and 60 km of twisted wire is manufactured for each of the case where the wire supply reel is rotated and the case where it is not rotated. investigated. Figure 2 shows the method that does not rotate the reel
According to (B), the method of rotating the reel is the method shown in FIG. 1, and the number of rotations of the reel is 2500 rpm.

Prototype Example 3: Seven nickel-plated copper alloy hard wires having a wire diameter of 0.035 mm were twisted using a double bunch twisting machine. The twist pitch is 0.95 mm, the number of revolutions of the twisting machine is 1700 rpm, and 60 km of twisted wire is manufactured for each of the case where the wire supply reel is rotated and the case where the wire supply reel is not rotated. investigated. The method in which the reel is not rotated is shown in FIG. 2B, the method in which the reel is rotated is the method shown in FIG. 1, and the number of rotations of the reel is set to 1700 rpm.

The results of the above survey are shown in Table 1.
The effect of the present invention is remarkable in that the twisting applied to the strands during twisting is eliminated or alleviated by drivingly rotating the strand supply reel.

[0019]

[Table 1]

[0020]

As described above, according to the method for producing a metal stranded wire of the present invention, the twisting applied to the strand during twisting is eliminated or alleviated, and the breakage of the strand during twisting is reduced. ,
It is effective in improving productivity and product yield. Further, brittle metal wires can be twisted with high productivity, which was difficult in the conventional twisting method due to the occurrence of wire breakage, with high productivity.

[Brief description of drawings]

FIG. 1 is an explanatory view of a specific example of a method for producing a metal strand according to the present invention.

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]

 1 wire supply reel 2 brake brush 3 motor 4 turntable 5 guide A wire

Claims (3)

[Claims] 1. In the production of a metal twisted wire by a collective twisting method in which the wires to be twisted are bundled and twisted together to form a twisted wire, each reel supplying the wires is twisted around the reel axis. A method for producing a metal twisted wire, which comprises drawing a wire in an extension line direction of a reel shaft while drivingly rotating the same in the same direction as that of the wire and supplying the wire to a twisting machine. 2. The method for producing a stranded metal 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 rotational speed of the reel is the rotational speed of the twisting machine.
2. A range from 0.5 times to 1.5 times.
A method for producing a stranded metal wire as described.