JPH02186505A - Manufacture of formed twisted-wire - Google Patents

Abstract

PURPOSE:To enable the stable long-size-processing without the cross of cores and the ununiformity of the twist and the disconnection by twisting multiple cores around a conical spacer to set the rotating direction and the speed of the spacer as same as the rotating direction of the twist of the core and the rotating speed of the core. CONSTITUTION:A spacer 4' is formed in a cone, and is rotated in the rotating speed as same as the twist rotating speed in the direction as same as the twist rotation. Consequently, the frictional force generated between the spacer 4' and the cores works in the reverse direction to the longitudinal progressing direction of the cores, and the cores move smoothly and stably on the spacer without the influence of the frictional force in the axial direction of the spacer. A spiral channel 10 having the pitch as same as the twist pitch is especially provided in the spacer 4', and when the cores are induced with the guide of that channel, the movement of the cores in the axial direction of the spacer 4' is perfectly restricted. Thereby, the movement of the cores is more stabilized, and the generation of the cross of cores and the ununiformity of the twist can be prevented. The processing of a long size formed-twisted-wire is thus possible.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing shaped stranded wire.

[Conventional technology]

A shaped stranded wire, for example, a superconducting shaped stranded wire (7) which is required to have a large current capacity, has a flat cross-sectional shape and is twisted in two layers, as shown in FIG. This shaped stranded wire (7) is produced by a shaped stranded wire machine as shown in FIG. That is, the superconducting core wire (2) wound around the stranded wire drum (1) is guided to the batten (3), twisted around the spacer (4), and then shaped by the four-sided roll (5) to form the twisted wire. line(
7), and this formed stranded wire (7) is the capstan (6).
After that, it is wound onto a drum (8). Spacer (4
) is a round bar with a flat tip and a smooth surface, as shown in Figure 4.

As shown in Fig. 5, this spacer (4) serves to make the twisted core wire (2) into a rectangular shape and guide it to just before the four-sided roll (5) to facilitate roll rolling. .

[Problem to be solved by the invention]

In the method for manufacturing a shaped stranded wire as described above, the core wires twisted around the spacer are pulled by the capstan in that state and slide on the surface of the spacer toward the four-way hole. At that time, frictional force is generated between the core wires and the spacer surface, and if the motion of the core wires becomes unstable and not smooth, the twisted core wires tend to cross each other or become unevenly twisted. was there. In the case of superconducting molded stranded wires, if the core wires cross, there is a risk that the superconducting properties will deteriorate at that part or the core wires will break.

The present invention has been made in view of the above points.
The purpose is to provide a method for manufacturing a shaped stranded wire that can be stably processed into a long length without cross-stranding, uneven twisting, or wire breakage.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a method for manufacturing a formed stranded wire in which a plurality of core wires are twisted around a spacer and formed by a roll, in which a plurality of core wires are twisted around a conical spacer, The first invention provides a method for manufacturing molded PvA, characterized in that the spacer rotates in the same direction as the twisting rotation direction of the core wires with respect to the spacer, and the rotational speed of the spacer is the same as the twisting rotation speed of the core wires with respect to the spacer. , a second invention provides a method for manufacturing a shaped stranded wire, which comprises twisting a plurality of core wires around a conical spacer having a groove.

[Effect]

When processing formed stranded wires into long lengths, it is necessary to ensure stable and smooth movement of the core wires over the spaces in order to prevent the core wires from crossing over or twisting unevenly.

According to the present invention, as shown in FIG.
By making spacer (4') into a conical shape and rotating spacer (4') in the same direction as the twisting rotation at the same rotational speed as the twisting rotation, the frictional force acting between the spacer (4') and the core wire is The direction is opposite to the longitudinal direction of the core wire, and the core wire moves smoothly and stably on the spacer without being subjected to frictional force in the axial direction of the spacer. In particular, the spacer (4'
) is provided with a spiral groove 00) with the same pinch as the twisting pinch, and when the groove is used as a guide I to guide the core wire, the core wire will be spaced.

Since the movement in the axial direction of (4') is completely suppressed, the movement of the core wire is further stabilized, and the occurrence of crossing of the core wire and uneven twisting can be prevented. In addition, since the frictional force acts only in the opposite direction to the longitudinal direction of the core wire, even if the surface of the core wire is coated and the frictional force with the spacer is large, the stranded wire can be formed without damaging the coating material. It has the effect of being processed.

〔Example〕

The present invention will be described in detail below based on embodiments shown in the drawings.

Figure 1 shows an embodiment of a spacer used in the manufacturing method according to the present invention, in which a tapered part (9) with an 18-valent length is attached to a round bar with a diameter of 1.8 mmφ, and the diameter of the tip is 0.3 mmφ. A conical spacer (4') is shown.

This spacer (4') has seven U-shaped grooves 00) closely spaced in a spiral shape at a pitch of 40 mm in the tapered portion (9). Using this spacer, the number of twists is 7 from a superconducting wire with a core diameter of 0.648 mmφ.
Twisting pitch 40 mm, molding code ``1] 2.5 mm,
A superconducting molded stranded wire having a thickness of 1.15 mm was produced.

The processing conditions are that the forming line speed is 1 m/min, and the twisting rotation speed and the rotation speed of the spacer (4') are both 25 m/min.
It was rotation/min. In this way 1500
When a molded stranded wire of m was produced, there was no core wire breakage, no crossing, and no twisting unevenness, and a good superconducting molded stranded wire could be obtained.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of core wires are twisted around a conical spacer, and the spacer rotates in the same direction as the direction in which the core wires are twisted relative to the spacer, and the rotational speed of the spacer is set at a speed equal to the rotation speed of the spacer. Since the rotational speed is the same as the twisting speed of the core wire, it has the excellent effect of making it possible to process long shaped stranded wires without causing defects such as core wire breakage, crossing, and uneven twisting. .

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of a spacer used in the method for manufacturing a formed stranded wire according to the present invention, Fig. 2 is a perspective view of a conventional example of a formed stranded wire, and the third section is a perspective view of a conventional example of a formed stranded wire. Explanatory diagram, Fig. 4 is a perspective view of a conventional example of a spacer, Fig. 5 is opening 1... stranded wire tram, 44'... smooth gap sukun, 9... taper part, 1 is rolling forming. FIG. 2... Cord wire, 3... Grain plate, 5... Four-sided roll, 6 7... Molded stranded wire, 8... Drano 0... Groove.

Claims (3)

[Claims] (1) In a method for manufacturing a formed stranded wire in which a plurality of core wires are twisted around a spacer and formed by a roll, a plurality of core wires are twisted around a conical spacer, and the spacer is twisted and rotated with respect to the spacer. A method for manufacturing a shaped stranded wire, characterized in that the spacer rotates in the same direction as the spacer, and the rotational speed of the spacer is the same as the rotational speed of the core wire twisted with respect to the spacer. (2) The method for manufacturing a shaped stranded wire according to claim 1, characterized in that a plurality of core wires are twisted around a conical spacer having a groove. (3) The method for manufacturing a shaped stranded wire according to claim 1 or 2, characterized in that the core wire is coated with a surface and has a large frictional force with the spacer surface.