JPH0325558B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing irregularly shaped stranded wires that have smooth surfaces and are free from twisting.

(Prior Art) A locked coil rope is a typical example of a deformed stranded wire manufactured by twisting deformed wires together. Two methods of twisting this locked coil rope are the so-called Harahara twisting, in which the wires are wound in the circumferential direction from a bobbin, and the wires are pulled out and twisted without being twisted, and the other is the pre-twisting of the twisted wires. There is a twisting method in which the strands are twisted once per length of the pitch and wound, then pulled out from the bobbin and twisted together, the so-called standing stroke. The latter has the advantage that it can be twisted using a cylindrical twisting machine, but has the disadvantage that it is difficult to match the twist pitch of each strand. Therefore, the former method has been adopted as a general method for irregularly twisted wires.

However, with any of these methods,
In the case of irregularly shaped wires, it is not possible to give a preform to the wire by simply passing it alternately through multiple rollers as in the case of round wires or round strides. A wiring board capable of restraining the rotation of the wire is provided between the wire and the voice, and a slight preform is given to the wire by twisting it between 0 and 180 degrees between the wiring board and the voice. At the same time,
We are trying to obtain a stranded wire that is smooth and fits well as a stranded wire, which will be described later. However, with this method, the strands do not have a sufficient preform, and the strands have a strong repulsion against twisting, so the stranded wires produced have a large twist, and the surface of the strands has a tendency to change the inclination of the strands. This has the drawback of causing unevenness and poor smoothness.

(Objective of the Invention) The present invention has been made based on the above technical background, and provides a method for producing a stranded wire with a smooth surface without any twist.

(Structure of the Invention) The present invention applies twisting plastic deformation of one or more turns to a length corresponding to one pitch of the strands of the stranded wire to be produced while pulling out the shaped wire from a bobbin on which the shaped wire is wound. Then, while the twist of the wire is restrained so that one rotation is applied to the length corresponding to one pitch of the twist, a plurality of Each strand of the stranded wire to be produced is plastically deformed into a helical shape by bending through rollers, and then passed through a voice and shaped into a predetermined stranded wire.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 1, the twisting device includes a bobbin 1, a voice 2, a pair of wiring boards 5 disposed between them,
7 and a roller group 6 disposed between the wiring boards 5 and 7. A plurality of bobbins 1 are arranged and held in the circumferential direction by a holding body (not shown). This number is equal to the number of deformed wires used in the stranded wire 30 to be manufactured, and since 12 deformed wires 3 are used in this embodiment, 12 bobbins are arranged.

The support plate 4 is attached to the support frame 4 by connecting bolts 41.
A wiring board 5 is connected to the support plate 40 by a connecting bolt 42, and support plates 44, 45, 46 are attached at predetermined intervals to the connecting bolt 43 attached to the wiring board 5. A wiring board 7 is attached to the support plate 46 at the tip by a support member 70. The connecting bolt 41 is supported within the support frame 4 so as to rotate around the central axis 10 together with the central axis 10, and as the central axis 10 rotates, the wiring boards 5, 7 and the roller group 6 also rotate around the central axis 10. Rotate to. Further, at the other end of the central shaft 10, a plurality of bobbins 1 are arranged in the circumferential direction as described above.
A holder (not shown) is coupled thereto, and as the central axis 10 rotates, the holder and the plurality of bobbins 1 also rotate around the central axis 10. The bobbin 1 is held by a holder so as to be rotatable only about its own axis 11.

As shown in FIG. 2, the wiring board 5 consists of a circular plate 52 and a circular ring 53 whose inner peripheral surface is in close contact with the outer peripheral surface of the circular plate 52, and a through hole 5 formed between the two.
1 is the number of deformed wires 3 in the circumferential direction (in this example,
The shape of the through hole 51 is the same as the cross-sectional shape of the deformed wire 3. The wiring board 7 is formed in the same manner, but is formed so that the locus of the arrangement of the through holes 51 is a smaller circular locus.

Next, the operation of this device will be explained. Each bobbin 1
The deformed wire 3 fed out from the wiring board 5 passes through the through hole 51 of the wiring board 5, passes through the rollers 61, 62, 63, and passes through the through hole of the wiring board 7, and then is fed into the voice 2 where it is gathered up. , a stranded wire 30 as shown in FIG. 4 is formed. Note that a round wire 31 serving as a core material of the stranded wire 30 is also fed into the voice 2, but is not shown in FIG.

The deformed wire 3 is not restrained at the part where it passes through the support frame 4 and the support plate 40, and the through hole 5 of the wire 3 is
By penetrating through the bobbin 1 and the wiring board 5, the bobbin 1 and the wiring board 5 are restricted to be movable only in the length direction.
A twist is applied between the two. The amount of twisting is set so that plastic deformation of a twist that is slightly larger than the amount of twisting applied when the deformed wire 3 forms the stranded wire 30 is applied. That is, the deformed wire 3 is given a twist (over-twist) that is larger than the amount of twist that will be finally given. This amount varies depending on the torsional rigidity of the deformed wire, but it ranges from 0.8 to the length of the twist (length of one pitch).
It is sufficient to apply one twist per 0.95 times the length. For example, as shown in Fig. 6, the relationship between the amount of twist introduced and the amount of plastic deformation is determined in advance according to the material of the irregularly shaped wire. Then, the necessary amount of twist can be introduced accordingly. By applying the above-mentioned overtwisting, the yield point of the wire is lowered, and the amount of elastic recovery is reduced, which reduces the repulsive force of the wire against deformation processing, making it easier to form a spiral shape using the next roller processing. effective.

Further, in this embodiment, a bending deformation is applied between the wiring boards 5 and 7 by passing through three rollers 61, 62, 63, and this bending deformation is as shown in FIG. The outer surface 33 of the irregular wire (the surface forming the outer surface of the stranded wire 30) is on the tension side, and the irregular wire 3 is twisted by the same amount as the maximum twist between the wiring boards 5 and 7. It is set to be granted. That is, the rollers 61, 62, 63 are formed with grooves 60 that match the shape of the profiled wire 3, as shown in FIG. As a result, the deformed wire 3 is restrained and subjected to bending deformation.

Also, since the bobbin 1, the wiring boards 5, 7, and the roller group 6 are rotating together, the deformed wire 3 is responsible for the twisting between the bobbin 1 and the wiring board 5 and the twisting between the wiring boards 5 and 7. It does not change while being sent out and always remains in the same state. The deformed wire 3 that has passed through the roller group 6 is twisted in its final state (forming the twisted wire 30). Therefore,
The voice 2 functions only to arrange the deformed wires 3 to which a predetermined plastic deformation has been applied, respectively, at predetermined positions.

The stranded wire 30 formed in this way has the shape of the stranded wire 30 because the deformed wire 3 constituting its outer surface is twisted in a state in which the final shape is plastically deformed in advance, that is, the twisted wire 30 is shaped by voice twisting. Because it is not forcibly shaped, there is no residual stress that would cause it to untwist, and the outer surface is smooth.
That is, even if the stranded wire 30 is cut at an arbitrary position,
The cut end surface maintains the same cross-sectional shape and does not come apart. Therefore, when cutting the stranded wire, there is no need to firmly hold the area around it.
Very convenient for various tasks.

In addition, in the conventional twisted wire, since stress remains in the deformed wire in the twisted state, so-called disintegration occurs when the restraint by the terminal tool or the like is released. In addition, in the conventional twisted wire, the cross-sectional shape of the deformed wire 3 is deformed by twisting with the voice, and the seventh
As shown by the broken line 3a in the figure, the outer surface of the stranded wire is uneven and does not have a smooth outer surface.

(Effects of the Invention) As explained above, the present invention is a method for twisting irregularly shaped wires in advance so as not to generate residual stress by twisting the irregularly shaped wires in advance. The outer surface of the wire can be finished smoothly, and since there is no residual stress in the wire, there will be no breakage even if the wire is cut without restraint near the cutting point, making it extremely difficult to handle. It's convenient.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of an apparatus for carrying out this invention, Fig. 2 is a front view of a wiring board, Fig. 3 is an enlarged side view of a group of rollers, Fig. 4 is a cross-sectional view of a stranded wire, and Fig. 5 is a sectional view taken along the line -- in FIG. 3, FIG. 6 is a diagram showing the relationship between the amount of introduced deformation and plastic deformation, and FIG. 7 is an enlarged sectional view of the outer surface of the stranded wire. 1...Bobbin, 2...Voice, 3...Irregular wire, 5,7
...Wiring board, 6...Roller group, 30...Twisted wire, 51...Through hole.

Claims (1)

[Claims] 1 While pulling out the shaped wire from the bobbin on which the shaped wire is wound, plastic deformation is applied to each strand by twisting one or more turns for a length corresponding to one pitch of the strand of the stranded wire to be manufactured, and then 1 of twisting the wire
Each stranded wire to be manufactured is bent by passing it through multiple rollers so that the outer surface of the deformed wire is on the tension side while being restrained so that the length corresponding to the pitch is twisted by one rotation. A method for twisting irregularly shaped wires, characterized in that each wire is plastically deformed into a spiral shape, and then passed through a voice to form a predetermined twisted wire.