JPS6074209A - Method of producing flat twisted wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copper-coated wire, a cupronickel-coated wire, a copper-coated superconducting wire or a copper wire, an aluminum wire, and a plurality of round wires made of these wires coated with varnish, wrapped with tape, etc. The present invention relates to an improvement in a method for producing rectangular shaped stranded wires which are formed by twisting together rectangular shaped wires.

Conventionally, when producing the above-mentioned rectangular shaped stranded wire, first a cylindrical air-core stranded wire was formed using each element wire, and then this was biaxially rolled from the left and right sides to a Koons roller. ing. In this method, the stranded wires introduced into the nozzle roller have a gap in the center, which tends to cause the strands to become untwisted, and there is a risk that the strands may cross each other multiple times and break during molding.

Further, as shown in FIGS. 5 and 6, the cylindrical air-core stranded wire 50 is passed through a die 5 before being rolled by the Koons roller 51.
Is it possible to prevent untwisting by introducing the strands into a die and drawing them to increase the sum of contact arc lengths between the strands? Due to the rolling process carried out twice, excessive loads were applied to the superconducting wires embedded in the cables, causing damage.

This invention was made in order to eliminate the above-mentioned drawbacks, and can eliminate twisting and reliably prevent multiple crossings of each strand, and moreover, it is a superconducting wire embedded in the strand. The present invention provides a method for manufacturing rectangular shaped stranded wire that can be formed into a predetermined shape without damaging the wire.

In other words, the present invention is capable of arranging a plurality of round wires unwound from a bobbin into the same circumferential shape until just before they are twisted by introducing each of them into the guide hole of a nose that rotates coaxially with the wire twisting machine. Immediately after being led out from the nose described in -, each strand is introduced into the circular 9-shaped introduction hole of the die, and each strand is inserted into the rectangular hole with a rectangular cross section connected to the introduction hole of the die. The rectangular stranded wire is twisted together into a rectangular shape, and the rectangular stranded wire is rolled immediately after being led out from the die by a Turk's head roller placed close to the arc-shaped recess formed at the tip of the die. This is how it was done.

Embodiments of the present invention will be described below with reference to the drawings. 1st
The figure is a process diagram for explaining the method for manufacturing a twisted wire according to the present invention. A plurality of round wires 10 are unwound from a bobbin 1 of a wire twisting machine, and are introduced into a guide hole 20 of a nose 2 which rotates coaxially with the wire twisting machine, and are then continuously installed in the nose 2. The rectangular strands are introduced into the conical introduction hole 60 of the die 3 and twisted into two rectangular shapes in the rectangular hole 61 with a rectangular cross section connected to the introduction hole 60 of the die B. 11 is configured to be rolled by Turk's head rollers 4 placed on the left and right sides of the tip of the die 6.

The guide hole 20 of the nose 2 is a conical introduction hole 6 formed at the rear end of the die 6, as shown in FIG.
It is formed to be inclined at a predetermined angle so as to converge toward 0,
In addition, a tapered protrusion 21 is formed at the tip of the nose 2 to restrict the circular line 10 led out from the guide hole 20 from the inside. The strands 10 are arranged on the same circumference until just before being twisted together, and are directly twisted together in a rectangular shape within the rectangular hole 61 of die B. Also, as shown in Fig. 6, there is a Turk's head roller 4 on the outer periphery of the tip of the die.
An arc-shaped recess 62 corresponding to the outer circumferential surface of the roller 4 is provided, and by arranging the recess 62 and the outer circumferential surface of the roller 4 in close proximity to each other, the Turk's head roller 4
The rolling part of the die B is configured to be close to the tip of the die B. Therefore, the stranded wire 11 is rolled immediately after being led out from the die 6. By the way, this die 6 is
It is formed by a double pair of divided pieces.

In this way, the rectangular stranded wires 11 are directly twisted without forming an air-core stranded wire before being rolled by the Turk's winding roller 4, and from before each strand 10 is twisted until the rolling process is completed. During the process, each strand 10 is always regulated and positioned by the nose 2, die 6, and Turk's head roller 4, so each strand 10 can be twisted accurately into a predetermined shape without twisting. It can be molded by Therefore, when the stranded wires 10 are rolled by the Turks and head rollers 4, it is possible to reliably prevent each strand 10 from intersecting multiple times and breaking.

In addition, in one rolling process using this roller 4, 95
It is possible to produce a rectangular shaped stranded wire having a stacking ratio of % or more. That is, the area of the voids in the stranded wires can be suppressed to 5% or less, and furthermore, damage to the superconducting wires etc. embedded in the strands 10 can be reliably prevented.

Incidentally, the inclination angle α of the guide hole 20 of the nose 2 is 0'
It is desirable to set it within a range of 120° from /l).

That is, when the inclination angle α is smaller than 30°, there is a disadvantage that the horizontal length L of the guide hole 20 becomes long and the device becomes larger, and when the inclination angle α is larger than 120°, the If the introduction angle of the wires 10 is too steep, there is a possibility that the twisting disorder 11 may occur.

Alternatively, if the die 3 is formed from a pair of upper and lower divided pieces as shown in the above embodiment, the die 3 may be separated from each other at the start of operation. The wire 10 can be introduced into the rice 6, which has the advantage of greatly improving work efficiency. Furthermore, by configuring both the divided pieces to be pressed with a predetermined pressure from above and below, an appropriate pressing force can be applied to the strands 1D to be twisted together in the die 6, and a rectangular shape of a predetermined shape can be applied. The twisted wires 11 can be formed accurately.

Further, it is desirable that the length H of the central portion of the conical introduction hole 60 formed in the die is set to about 5 to 200 times the diameter d of the strand 10. That is, if the length H is five times or more the diameter d of the strand 10, there is a risk that the strand 10 cannot be positioned properly, resulting in disordered twisting, and if the length H or the diameter d This is because if the length is 20 times or more, the total length of the dice 6 becomes too large, resulting in an increase in the size of the device. Furthermore, the rectangular hole 61 of the die 6 must be formed into a predetermined shape by pressing the stranded wire 11 from above and below, and must be regulated to prevent the stranded wire 11 from escaping in the left-right direction. Set D as follows.

w = dx (-u-Z 10 lines')XK-(2)D=
2 d-G --(3) G-(0,1 to 0.5) (1), and this value is determined by multiplying the width (A-1-B) of the stranded wire 11, which is determined geometrically in FIG. It is a combination of things.

Moreover, when the number N of the strands 10 is an even number, the above formula (
2), which is the value obtained by adding the coefficient K by 411 digits to the width of the twisted wire 11 (C+2 B >) in FIG. 4(b).

Note that the above numerical values A, B, and C are as shown below from the wire diameter d and the number N.

A=dX''-1 B=dX''' C=dX N-2 If the value of the above coefficient is too small, the width W of the rectangular hole filter 1 becomes too narrow and the elements are twisted together in the die filter. line 10
is strongly pressed from the side, multiple crossings of the strands 10 occur, making it impossible to form the rectangular stranded wires 11.
If the value of the coefficient is too large, the width W of the rectangular hole 31 becomes too large, making it impossible to restrict the stranded wire 11 in the width direction), making it impossible to form the stranded wire 11 into a predetermined shape. ).

Therefore, it is desirable to set the value of the above coefficient to about 0.8 to 1.5, and this has been experimentally confirmed.

Further, the depth D of the rectangular hole 61 is set to a value obtained by subtracting the presser foot G from the height 2d of the stranded wire 11 as shown in the above equation (3), and this presser foot G is shown as the above equation (4). It is desirable to set the diameter d to about 0.1 to 0.5 times the diameter d of the wire 10. That is, if the presser foot G is less than 0.1 times the frame diameter d, the presser foot is insufficient and the stranded wire 11 cannot be formed into a predetermined shape unless the strands 10 are sufficiently pressed inside the die filter. The presser foot G or the diameter d is 0.
If it is 5 times or more, even if the upper and lower divided pieces are pressed with an appropriate pressure, a gap will be formed between the two divided pieces, and the strands 10 can be inserted through this gap to form a normal rectangular stranded wire 11. This is because it becomes impossible to do so.

A specific example in which a rectangular shaped stranded wire was manufactured by the manufacturing method according to the present invention will be described below. That is, the diameter d
is Q, 16 strands 1 made of multicore superconducting wire of 34rs
0 into the guide hole 20 of the nose 2 with an inclination angle α of 90°, the horizontal part height H of the conical introduction hole 60 is 15 sa.
, the width W of the rectangular hole 61 is 8.5M (K = 1.3), the depth D is 1.3 sides CG = 0.38 words), it is guided to the Turk's sodor roller 4 through the die 6, and the thickness i, 5rn
When 100 m of rectangular shaped stranded wire with a width of 5.6 words and a space factor of 85% or more was molded, no multiple crossings or disconnections of the strands 10 occurred.

As explained above, in the present invention, each strand is regulated so that it is arranged on the same circumference until just before it is twisted, a rectangular stranded wire is formed directly in the die, and this stranded wire is Since the structure is configured so that the wire is rolled by a Turk's head roller immediately after being drawn out from the Turk's head roller, it is possible to manufacture a rectangular shaped stranded wire in a predetermined shape without causing breakage due to twisting or multiple intersections. Since rectangular shaped stranded wires having a predetermined stacking ratio can be manufactured by one rolling process using a sodra roller, this method has the advantage that damage to the superconducting wires etc. embedded in each strand can be prevented.

[Brief explanation of the drawing]

$1171 is a process diagram showing an embodiment of the present invention, FIG. 2 is a partially enlarged sectional view showing the structure of the nose and die, FIG. 3 is a partially cutaway perspective view showing the structure of the rear end of the die, and FIG. 4 (ai, (b) is a cross-sectional view showing the structure of the stranded wire, FIG. 5 is a process diagram showing a conventional example, and No. 61 No. 1 is a cross-sectional view taken along the line I-■ of No. 51 No. 1. 1. Bobbin, 2...Knows, 3...Dice, 4...
... Turk's head roller, 10 ... Round wire, 11 ...
Twisted wire, 20... Guide hole, 60... Conical introduction hole, 31...
...Flattening, 62 - Recessed part. Patent Applicant: Shinko Wire Industry Co., Ltd. Kobe Steel, Ltd. Figure 3 Figure 4 Figure 5 Figure 6 Figure Proceedings (Voluntary) 1. Indication of the case ■ 3 Japanese Patent Application No. 182304 No. 2, Name of the invention Manufacturing method of rectangular shaped stranded wire 3.7 ■ Relationship with the rectifier case Patent applicant name Kami vAvA Wire Industry Co., Ltd. (one idiot) 4, representative J
! I! Person Address: Shin Matsuoka Building 5, 1-10-3 Nishihonmachi, Nishi-ku, Osaka, Date of the amendment order Contents of amendments in each column of ``(1) 2nd line of page 6 for details ``95% or more loading ratio''
Corrected as 6*J with r80-95%. (2) Deletion of "J, that is, . . . deki," from line 3 to page 5 of page 6 of the specification. (3) In the specification, page 11, line 9, “(b) is a stranded wire” is changed to [
(b) is corrected to ``stranded wire after twisting and before rolling.''

Claims (1)

[Claims] 1. A plurality of round strands of wire drawn out from the bobbin are arranged in the same circumferential shape until just before they are twisted by inserting them into the guide holes of the nose, which rotates coaxially with the wire twisting machine. Immediately after being led out from the nose, each strand is introduced into the conical introduction hole of the die, and each strand is twisted into a rectangular shape in a rectangular hole with a rectangular cross section connected to the introduction hole of the die. The rectangular strand is characterized in that the rectangular stranded wire is rolled immediately after being led out from the die by a Koons head roller disposed close to an arc-shaped recess formed at the tip of the rectangular wire. Method of manufacturing formed stranded wire.