JPH0247044B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an apparatus for manufacturing stranded wire conductors.

Currently, there is a trend toward SB (smooth body) stranded wire conductors for the purpose of improving electrical characteristics and saving materials. When manufacturing this SB conductor,
Methods such as 1) shaping individual wires of a stranded wire conductor and twisting them together, and 2) twisting round wires together and then passing the twisted wires through a die to form them into SB have been implemented. There is.

However, as long as a conventional wire twisting machine is used, there are the following limitations. In other words, when performing multi-layer twisting or concentric twisting, which is the most frequently used method for electric wires, conventional wire twisting machines rotate while holding either the material supply drum or the twisted wire winding drum inside the machine. For these reasons, it is impossible to perform continuous production in which the material is supplied from outside the machine and the twisted strands are wound outside the machine. A process is necessary.

In addition, apart from the above-mentioned restrictions, the stranded wire of the SB conductor as a whole has a substantially dense circular cross section, but each of the individual strands constituting this conductor has a substantially rectangular cross section.

The present invention solves the above-mentioned drawbacks of the prior art and
This was created by focusing on the characteristics of SB conductors, and it is possible to directly manufacture conductors with a nearly rectangular cross section for SB conductors by continuously supplying rough wire, and then twist and continuously wind them. The purpose of the present invention is to provide a device capable of simultaneously obtaining multiple single wires without twisting.

That is, the present invention provides an annular wire passageway formed between an internal rotating body and an external rotating body that rotate in the same direction, a wire feeding guide disposed on one side of the wire passageway, and a wire feeding guide disposed on one side of the wire passageway. A rotary head is disposed on the other side and has a plurality of wire passages therein, and a plurality of cutting tools are disposed in a circle on an end face of the rotary head facing the wire passage, and the external rotary This is a stranded wire manufacturing device with a plurality of protrusions arranged on the body side.

The present invention will be explained below based on the accompanying drawings. FIG. 1 is an overall view of the stranded wire manufacturing apparatus, in which a is a wire rod (rough wire), and b is a strand of wire serving as a core wire of the stranded wire, both of which are wound around a drum (not shown).

The wire a is drawn down to a predetermined diameter by a die 1, passes through a rear tension applying device 3 equipped with a plurality of rolls 2 and a preheating heater 4, and is supplied to a stranded wire forming device 5 whose exterior is sealed, where it is formed into a plurality of elements. sent out as a line.

The stranded wire forming device 5 is connected to a vacuum device and an atmosphere adjusting device (not shown) through a pipe 6, and is configured to prevent scale (metal oxide) from forming on the strands to be formed. The stranded wire forming device 5 is equipped with a stranded wire forming machine main body according to the present invention, which will be described later, and drive shafts 18 and 26 are integrally formed in the internal rotating body and rotating head that constitute the main body, respectively. The shaft 18 extends through the reducer 7 driven by the motor 8, and its tip is connected to a rotary joint 9 equipped with a molding die (not shown) for forming the wire b. 26 is connected to the speed reducer 11 driven by the motor 12. Both shafts 18 and 26 serve as output shafts of reduction gears 7 and 11, respectively.
Further, the rotary joint 9 is provided with a pipe 10 for feeding a cooling liquid, so that necessary parts inside the shaft 18 or the molding machine body can be cooled.

Thus, the plurality of strands (not shown) sent out by the stranded wire forming device 5 are formed into strands with the center of the strands b fed through the rotary joint 9 and the shaft holes of the shafts 18 and 26. They are collected at the twisting port 13 which also serves as a.

The collected strands and the strand b that becomes the core wire
are twisted by the rotation of the rotating head of the molding machine main body to form a strand c. In this case, the necessary tension at the twisting port 13 is provided by the take-off capstan 14,
Thereafter, the stranded wire c is wound up by a winding machine (not shown).
This take-off capstan 14 is housed in a stranded cooling device 15, which is connected by a pipe 16 to another atmosphere conditioning device (not shown).

FIG. 2 is a partially cutaway perspective view of the stranded wire forming machine main body according to the present invention installed in the stranded wire forming device 5 of FIG.
FIG. 3 shows a perspective view of the main part of FIG. 2.

In the figure, 17 is a cylindrical internal rotating body that is rotated by the driving force of the shaft 18, and 19 is an external rotating body that is wrapped around the outer periphery of the internal rotating body 17, and as described later, the frictional force with the wire rod or rotated in the same direction as the internal rotating body 17 (in the direction of the arrow in the figure) by a driving force (not shown).

An annular wire passage 20 is formed between the two rotating bodies 17 and 19. A fixed guide 21 is provided on one side of the wire passage 20, and a rotating head 24 is provided on the other side. Edge 22 of fixed guide 21
is inclined or curved toward the wire rod passage 20 side, and a wire rod inlet 23 is provided with its starting point and ending point shifted by one pitch.

The rotating head 24 is connected to a shaft 26 that communicates with a plurality of wire passages 31, and is connected to a drive source (not shown), and has a hole 27 in its axis through which a center line necessary for obtaining concentric strands is passed. It is set up.
Further, a wire passage 20 is provided on the end surface 25 of the rotating head 24.
A plurality of cutting tools 28 are arranged in a circular shape facing the same, and a plurality of protrusions 29 are provided protruding from an end surface 25 on the circumference between the cutting tool 28 and the external rotating body 19.

This protrusion 29 is disposed diagonally in front of the cutting blade 28' formed at the tip of the cutting tool 28, and a guide slope facing the cutting edge 28' is provided at the tip of the protrusion 29 in the direction of rotation of the rotary head 24. (in the direction of the illustrated arrow) and/or along the rotation axis direction.

Further, inside the rotary head 24 and shaft 26, a plurality of strand passages 31 are provided in the axial direction of the rotary head, communicating with orifices 30 formed between adjacent cutting tools 28. This strand passage 31 opens at the rear end surface of the shaft 26.

Next, the operation of the stranded wire forming machine main body according to the present invention will be explained.
The wire introduced into the inner and outer rotating body 1
The rotating head 2 is wound around the internal rotary body 17 by friction with the wire rods 7 and 19 by the diameter of the wire per rotation.
The wire progresses in four directions, and the wire is sufficiently compressed and heated by the protrusions 29 to cause plastic deformation, and the wire rod passes through the wire path 2.
It is molded into a cylindrical material having the same inner and outer diameters as 0.

The tubular material thus formed advances to the left in FIG. 2 within the wire passageway 20, and its tip end eventually rides on the guide slope 29' of the protrusion 29. However, the cylindrical material is
Since there is a relative speed difference between the guide slope 29' and the guide slope 29', the outer side is rubbed by the guide slope 29' at the same time as the leading end is rubbed against the guide slope 29'.
It is formed into a tapered shape along 9', and the tip is made thin to a thickness approximately equal to the blade width of the cutting blade 28', and is guided to the cutting tool 28. Then, the cutting blade 28' of the cutting tool cuts the continuous wire with a substantially rectangular or fan-shaped cross section, and the wire is cut into a wire passage 31.
sent out of the aircraft. Incidentally, since the tip part is separated from the external rotating body 19 and comes into contact with the guide slope 29' provided in a circular shape, the frictional resistance is reduced due to the reduction in the contact area, and the required power can be reduced.

As shown in FIG. 1, the plurality of sent out strands are subjected to forward tension by the take-up capstan 14, and are formed into a predetermined shape by a die (not shown) near the exit of the strand passage 31, and then passed through the shaft hole 27. The strands are gathered at the twisting opening 13 around another central strand b that has passed through, are twisted together by the rotation of the rotary head 24, and then are wound up through a forming die (not shown).

Further, when the rotary head 24 is stationary, the wire is wound up as a multi-thread single wire.

As explained in detail above, in the stranded wire manufacturing apparatus of the present invention, a plurality of protrusions are provided on the external rotary body side of the rotary head, and the tubular material is guided to the tip of the protrusion into the cutting tool. Since the guide slope is formed in the direction of rotation of the rotary head and/or the direction of the rotation axis, the formability of the cylindrical material near the cutting tool improves, and the formability of the strands cut and formed by the cutting tool is improved. , quality such as strength has been improved. In addition, in the present invention, since the protrusions are arranged in a circular shape, compared to the case where the protrusions are formed in a continuous annular shape on the external rotating body side,
It has the effect of reducing the frictional resistance with the raw material and significantly reducing the power required for extrusion molding.

Figure 4 shows the main body of a molding machine previously proposed by the present applicant (Japanese Patent Application Laid-Open No. 57-1533), in which there is a wire passageway between an internal rotary body 32 and an external rotary body 33 that rotate in the same direction. An annular groove 34 is formed, and the internal rotating body 3
A shoe member 35 that is fixed or rotatably movable is provided on the outer peripheral edge of the wire rod 2 to continuously feed out the wire rod d, and the fed wire rod is cut by a rotary head 36 having a plurality of dies 37 arranged in an annular shape and then fed out. ,
The sent out strands e are twisted together.

That is, in the case of FIG. 4, the wire is cut by the relative speed difference between the wire d and the rotating head 36, and is shaped and twisted by the die 37, and the chips produced during cutting are not used as a product. Problems remain regarding the portion that is not molded.

However, according to the apparatus of the present invention shown in FIGS. 2 and 3, the rotary head 24 is assigned only the functions of continuous cutting and twisting, and the shaping of the material is performed by forward tension. . Therefore, although the driving force increases in order to form the wire into a circular tube-shaped material, the driving force required for forming the wire rod is further reduced, making it possible to save labor as a whole.
Since a thickly formed tube is simply cut and sent out continuously, there is an advantage that no chips other than the product are produced.

[Brief explanation of drawings]

FIG. 1 is an overall explanatory diagram of a stranded wire manufacturing apparatus incorporating a stranded wire forming machine main body according to the present invention, FIG. 2 is a partially cutaway perspective view of the stranded wire forming machine main body, and FIG. FIG. 4 is a perspective view of the main parts of the conventional molding machine. 17... Internal rotating body, 19... External rotating body, 20...
Wire rod passage, 21... Wire feeding guide, 24... Rotating head, 28... Bit, 29... Protrusion, 31... Element wire passage.

Claims (1)

[Claims] 1. An annular wire passageway for forming a circular tube-shaped material from a wire rod is formed between an internal rotating body and an external rotating body,
Arranging a wire insertion guide on one side of the wire passage,
A stranded wire manufacturing apparatus is provided with a rotary head in which a plurality of cutting tools are arranged in a circle on the other side of the wire passage, and a plurality of protrusions are provided on an external rotary body side of the rotary head, and the protrusions are erected. A stranded wire manufacturing apparatus characterized in that a guide slope for guiding the tubular material to the cutting tool is formed at the tip in the direction of rotation of the rotary head and/or the direction of the rotation axis.