JPH10112228A - Manufacture of bare stranded cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strand up the deformed strand with the normal attitude at all times by detecting the abnormal attitude of the deformed strand after the formation of an outer layer, and controlling the position of a twist opening dies by moving the same along a longitudinal direction of a core strand. SOLUTION: A detector 9 is installed near a twist opening dies 7 for detecting the attitude of a bare stranded cable 8 after the stranding-up, to detect the attitude of the bare stranded cable 8 after the stranding-up. As the detector, a detector using the laser, such as a laser focus displacement gage, a laser scanning-type two-dimensional displacement sensor, or the like, is used. A signal is obtained on the basis of the detected information, and is sent to a CPU 11 to perform the processing of information, thereby judging whether the surface condition of the bare stranded cable 8 is normal or abnormal. When an abnormality is found, a command for adjusting the position of the twist opening (to command the forward or backward moving distance), is immediately sent to a twist opening dies moving motor 12, to perform the stranding operation. In this way, the abnormality in the attitude of the deformed strand 2 which is stranded up on the outermost layer can be detected and corrected instantaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a bare stranded wire such as a steel core aluminum stranded wire (hereinafter referred to as ACSR) and an optical fiber composite overhead ground wire (hereinafter referred to as OPGW), and a method of manufacturing the same. The present invention mainly relates to a method for correcting the attitude of the twisted deformed wire of the outermost layer.

[0002]

2. Description of the Related Art A round wire having a circular cross section is usually twisted with the outermost layer such as an ACSR or OPGW, but for the purpose of increasing the occupation rate or improving the surface smoothness, FIG. ) To (d) are used. That is, what is shown in FIG.
FIG. 4 (b) shows a twisted two-layer wire with a round cross section on a steel core, and a further outer periphery of the wire. Fig. 4
The one shown in FIG. 4C is obtained by twisting an aluminum-coated steel wire having a fan-shaped cross section around the outer periphery of an aluminum pipe containing an optical cable therein, and the one shown in FIG. Aluminum pipe with a fan-shaped cross section was twisted around the outer circumference of the aluminum pipe that was made, and an aluminum-coated steel wire with a substantially fan-shaped cross section having protrusions on its outer circumference and an aluminum-coated steel wire with a substantially fan-shaped cross section without protrusions were further twisted. Things. It should be noted that the deformed wires referred to in the present specification are not only those having a fan-shaped cross-section as stranded in the outermost layer of FIGS.
FIG. 4 (b), with a substantially rectangular cross section as shown in FIG.
The one having a substantially fan-shaped cross section having a projection as shown in FIG.

[0003] In the case of twisting an element wire, there is a case where a planet type twisting machine having a twist is used or a rigid type twisting machine without a twist is used.
Note that the twisting is a function of rotating the element wire once in a direction opposite to the rotation direction of the cage for each rotation of the cage, that is, for each pitch so that no twisting force remains in the wire itself.

[0004] When twisting round wires, either a planetary twisting machine or a rigid twisting machine can be used. For example, by twisting with a rigid twisting machine, twisting of the wire without twisting occurs. Even if a turning force remains, the cross-section is circular, so that even if it is twisted later, the cross-sectional shape and surface texture itself do not pose any particular problem.

However, when twisting deformed wires,
For example, if a twisted twisted wire is used to rotate the deformed wire one turn using a planet type twisting machine, the deformed wire will be turned upside down and will not be a product. Can not. Therefore, since the twisting force remains in each of the wires, if the wires are not properly twisted, as shown in FIG. 2 or FIG. -Not only does the tool become unusable, but it can no longer be used as a bare stranded wire.

[0006]

Conventionally, as a method of controlling the attitude of a deformed wire, the surface properties of the deformed wire after twisting are inspected by touching or visual inspection for an abnormality, and if an abnormality is found, the twisting wire condition is corrected. Then, there is a method of repeating the operation of confirming the result by touch or visual observation immediately after the correction, and the posture control is performed by this method.

However, in the above method, it is impossible to find 100% of an abnormal part because it is a touch or visual inspection, and even if it is found, it takes time to correct it, and the defective part becomes longer. There is a problem, and when the bare stranded wire is long, there is a problem that a burden on an operator is large.

[0008]

SUMMARY OF THE INVENTION The present invention has been intensively studied to solve these problems, and as a result, a method of twisting an irregularly shaped wire and a method of bare bare wire which fundamentally solve the above-mentioned problems. It is a discovery of a manufacturing method.

That is, the present invention relates to a method for producing a bare stranded wire, comprising forming an outer layer by twisting a plurality of irregularly shaped wires around the outer periphery of a core wire with a twisting die, the method comprising: Detecting the abnormal posture of the deformed wire, moving the twisting die along the longitudinal direction of the core wire so that the abnormal posture returns to the normal posture, and controlling the twisting die position. This is a method for producing a bare stranded wire.

In the case where a round wire is twisted or a deformed element wire is twisted, the twisting port of the twisting machine is
Twisting of the wire occurs between the final plate and the twist opening.
In the case of a round wire, there is a position where each strand is hardly disintegrated when a twisted wire is twisted into an electric wire, and the twisted hole is set at this position. On the other hand, in the case of the deformed element wire, the position of the twist opening is set so that the deformed element wire fits in the normal posture. If this is too far in front or too far behind, the deformed strand will not be able to maintain its normal posture and will stand out. However, the direction of the shoulder is reversed. Therefore, by detecting this shoulder and moving the die of the twist opening back and forth, the deformed wires can always be twisted in a normal posture.

[0011]

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

FIG. 1 shows a twisting machine (rigid type) according to the method of the present invention. The twisting machine (1) shown in the figure includes a bobbin (3) for supplying a deformed wire (2), a cage (4) for rotating the bobbin, a deformed wire (2) and a lower-layer stranded wire (5). )
And a twisting die (7) for twisting the deformed element wire (2) on the lower stranded wire (5).
And a CPU (10) for processing information via a detector (9) for detecting the posture of the twisted bare stranded wire (8) and an amplifier (10) for amplifying a signal from the detector (9). 11)
And a twisting die motor (12) for adjusting the position of the twisting die.

[0013] The twisting machine (1) includes a twisting die (7),
The deformed wire (2) before the stranded wire is supplied from the lower stranded wire (5) and the bobbin (3) installed in the rotating cage (4), and the lower stranded wire (7) is fed into the lower layer dies (7). Stranded wire (5)
This is a device for twisting a deformed element wire (2) on the above to obtain a twisted bare stranded wire (8).

According to the method of the present invention, a detector (9) is installed near the twisting die (7) of the above-described apparatus to detect the posture of the bare stranded wire (8) after twisting. The attitude of the bare stranded wire (8) is detected.
It is desirable that a detector using a laser, such as a laser focus displacement meter or a laser scan type two-dimensional displacement sensor, be used as the detector.

The detected information is converted into a signal, and the signal is sent to the CPU (1).
Sent to 1). The CPU (11) performs information processing and determines whether the surface property of the bare stranded wire (8) after twisting is normal or abnormal. When an abnormality is found, a twist position adjustment command is immediately sent to the twist die moving motor (12), and the order is instructed before or after how much to move.

A 1500 m stranded wire operation is performed by the above method,
After the work was completed, the surface properties of the stranded wire were examined. As a result, abnormalities were observed only in a few cm immediately after the start of the stranded wire.
The stranded speed (working efficiency) was 10 m / min.

As a comparison, an experiment was conducted by touching and visually inspecting an operator. As a result, a 1500 m stranded wire operation was performed.
The line was stopped five times in total. The twisting speed was 5 m / min.

[0018]

As described above in detail, according to the method for manufacturing a bare stranded wire of the present invention, it is possible to instantaneously detect and correct the abnormal posture of the deformed strand stranded on the outermost layer. It has remarkable industrial effects, such as contributing to quality improvement and cost reduction.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a method of the present invention.

FIG. 2 is a sectional view of a bare stranded wire rising to the right.

FIG. 3 is a sectional view of a bare stranded wire rising to the left.

FIG. 4 is a cross-sectional view of a bare stranded wire in which a deformed element wire is stranded at least on the outermost layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Twisting machine 2 Deformed element wire 3 Bobbin 4 Cage 5 Lower layer stranded wire 6th board 7 Twisting die 8 Untwisted stranded wire after twisting 9 Detector 10 Amplifier 11 CPU 12 Twisting die motor 13 Strand 14 Deformed strand rising left

Claims (1)

[Claims] 1. A method for producing a bare stranded wire, comprising forming an outer layer by twisting a plurality of deformed wires around an outer periphery of a core wire with a twisting die, wherein the deformed wire after forming the outer layer is provided. Detecting an abnormal posture, moving the twisting die along the longitudinal direction of the core strand so that the abnormal posture returns to the normal posture, and controlling the position of the twisting die. Wire manufacturing method.