JPS60154414A - Apparatus for producing shaped 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 Field of the Invention This invention relates to an apparatus for manufacturing shaped flat stranded wire.
In particular, the present invention relates to improvements for providing preferable conditions for molding with tuxedo rad rolls.

Description of the Prior Art The shaped rectangular stranded wire to which the present invention is applied can be advantageously used as a stranded superconductor 1js body if constructed using strands made of a superconducting material.

Generally, superconducting conductors can be broadly classified into monolithic type and stranded type. In the twisted wire type, generally IM
In the case of superconducting magnets of J or less, shaped rectangular stranded wire without a core material is used to increase the current density of the magnet and to enable the conductor itself to sufficiently support the electromagnetic force.

Furthermore, due to current capacity and magnet winding considerations, there is a demand for the development of a shaped rectangular stranded wire with a large number of twists and a large aspect ratio.

Such demands are particularly strong for magnets for high-energy accelerators.

Figure 1 shows 3i made of molded flat stranded wire! FIG. 2 is a schematic diagram showing an outline of the i-device. Bobbins 2 for supplying the element 1w11 are prepared according to the number of twists, and each bobbin 2 is rotated in the direction of arrow 4 within the supply cage 3 while keeping its posture constant. Element wire 1 pulled out from each bobbin 2
are collected in a rectangular twisting die 5, where they are twisted according to rotation in the four directions of the arrows.

When passing through the twisting die 5, the plurality of wires 1 are twisted into a substantially rectangular shape.
That's what it means.

) 6. Twisting l11 with such a rectangular approximate shape
6 is then passed through the rad roll 7 to the tux to cover it with the desired rectangular shape. The details of the tax head roll 7 will be described later, but it is composed of pairs of upper and lower rolls and left and right rolls.

The desired shaped rectangular stranded wire 8 has been obtained when it passes through the rad roll 7 to the tux, after which it passes through a capstan 9 and is then wound onto a winding drum 10.

Above') I! Passing through I redie 25 is a 0 rectangular approximation 1
The planar shape of the stranded wire 6 is shown in FIG. 2, and the cross section is shown in FIG. 13. Since the strand 116 having an approximately rectangular shape has not passed through the rad roll 7 to the tax, it is in an unstable strand state, especially since the edge part has not yet been formed. As shown in FIG. 4, the tension acting between the wires tended to break the proper stranding state. As this tendency progresses further, as shown in FIG. 5, it is destroyed to such an extent that it no longer retains its original form.

This phenomenon occurs due to the rigidity of the strands, which causes the jl! This is caused by the fact that the i-wire tends to become round, so when one strand rises, other strands move underneath it.

This tendency becomes more pronounced as the number of twists increases and as the aspect ratio increases.

In addition, the proper m4g status is the following tax head 1.
- Lua's (&rn) may be destroyed even if it is in I3. This will be explained in detail below.

FIG. 6 shows the arrangement of the tax head roll 7,
FIG. 7 shows an enlarged view of the operating portion of the tax head roll 7 of FIG.

The tax roll 7 is composed of a pair of side surface shaping rolls 11 that act from the left and right sides of the stranded wire 6 having an approximately rectangular shape, and a pair of upper and lower surface shaping rolls 12 that act from above and below. As shown in FIG.
The circumferential surface of each roll faces the side surface of the other adjacent roll. According to this arrangement, the shape and size of the gap 13 in FIG. 6 can be changed arbitrarily, and the number of twists can be changed.

As shown in FIG. 7, the strands 1 constituting the twisted wire are passed through the gap 12113.

In FIG. 8, the operating state of the tax roll 7 is illustrated divided into a side surface forming roll 11 and a top and bottom surface forming roll 12. When the stranded wire 6 having an approximately rectangular shape is formed by these rolls 11 and 12, part of the forming action is to increase the filling rate on the cross section of the strand 1, as shown in FIG. work like that. However, part of this shaping action results in the strands 1 being stretched upstream.

This state is represented by τ by the strand 1a shown in the lower drawing of FIG. For this reason, -1' shown in the upper part of Figure 8
The strand 1a extending between AB is slacker than the strand 1 between XY, and the strand 1a between AB is in a floating state. This state is shown in Figure 1''0, which shows the cross section along line E-F in Figure 8.As shown in Figure 10, the gap formed by the raised east line 1a is filled with adjacent elements. Wire 1 enters and the shape of the rectangular stranded wire is destroyed. That is,
The reason why the wire 1a between AB can maintain the rectangular state is because of the friction between the wires adjacent to points A and 8.

In this case as well, the tendency for the above-mentioned proper twisted state to be disrupted is more pronounced as the number of twists increases and as the aspect ratio increases.

Purpose of the Invention Therefore, an object of the present invention is to provide an apparatus for manufacturing a shaped flat stranded wire that can stably form a shaped flat stranded wire into a shaped flat stranded wire having a large number of twists and a large aspect ratio. be.

SUMMARY OF THE INVENTION This invention provides an arrangement in which the O-roll axis of the upper and lower surface forming rolls constituting the tax roll is arranged upstream of the roll axis of the square side surface forming roll, and the O-roll axis of the upper and lower surface forming rolls constituting the tax roll is arranged upstream of the roll axis of the square side surface forming roll. The present invention is an apparatus for manufacturing a shaped rectangular stranded wire, characterized in that upper and lower surface shaping rolls are brought into contact with the stranded wire first.

According to the invention of the effect mouth of the..., I! of rectangular approximate shape! When 111A passes through the rad roll position to the tax, the rolls for forming the upper and lower surfaces come into contact first, so the rolls for forming the upper and lower surfaces can advantageously prevent the i-line from rising due to the forming action of the side forming rolls. It can be held down. Therefore, lifting of the strands on the flat surface of the stranded wires is prevented, and rectangular molding can be stably performed. And without a core,
It is possible to smoothly manufacture even formed rectangular stranded wires with a large number of twists (and a large aspect ratio).

DESCRIPTION OF THE EMBODIMENTS Some embodiments of the invention are shown in Figures il1 to 13.
Each is shown in the figure. These figures 11 to 1
FIG. 3 is a diagram corresponding to FIG. 8 described above, and shows the characteristic parts of each embodiment of the present invention. In addition, in FIGS. 17 to 13, parts corresponding to those shown in FIG. 8 are indicated by the same reference numerals.

In each of the embodiments of the present invention shown in FIGS. 11 to 13, the position 12a of the roll axis of the roll 12 for forming the upper and lower surfaces is lower than the position 1211a of the roll axis of the roll 11 for forming the side surfaces. , located on the upstream side. Then, the contact start point C between the stranded wire 6 and the upper and lower surface forming rolls 12
is located upstream from the contact start point A between the stranded wire 6 and the side surface forming roll 11. Therefore, the upper and lower surface forming origin rolls 12 contact the stranded wire 6 first. It looks like this.

In each embodiment, the position 11a of the roll axis of the roll 11 for side surface molding and the position 1 of the roll axis of the roll 12 for molding the upper and lower surfaces.
2a differ from each other, and this is due to the contact start point A between the stranded wire 6 and the side surface forming roll 12 and the contact end point between the stranded wire 6 and the upper and lower surface forming rolls 12. Rank N
They are distinguished by l1l staff.

In the embodiment shown in FIG. 11, the side surface forming roll 11
This is a case where the contact start point A with the upper and lower surface forming rolls 12 and the contact end point with the upper and lower surface forming rolls 12 are at the same position.

In the embodiment shown in FIG. 12, the upper and lower rIBIR type rolls 12
The end point of contact with the side surface forming roll 11 is located on the downstream side with respect to the start point A of contact with the side surface forming roll 11.

According to each of the embodiments shown in FIGS. 11 and 12, the restraining force exerted by the upper and lower surface forming rolls 12 is always applied to the element 1!1a on which the forming action of the side surface forming rolls 11 is about to be applied. is working.

In the embodiment shown in FIG. 13, the upper and lower i10 forming rolls 1
The end point of contact with 2 is the side curve formation ll? 1"-ru 1
It is located on the upstream side with respect to the contact start point A with 1. In this case, the restraining force of the upper and lower surface forming rolls 12 is still exerted on the upstream side of the approximately intermediate portion of the wire 1a between AB where the action of the lead surface forming eye 11 is about to work. It is preferable that That is, the end point of contact with the upper and lower surface forming rolls 12 is located downstream of point G of [A B ] cos θx (1/2) as measured from the contact starting point with the side surface forming rolls 11. It is desirable that these conditions be met. In addition,
Here, [AB] indicates the distance that one strand 1a extends on the flat surface of the stranded wire 6, and θ indicates the twisted melon.

Next, we will introduce the results of experiments conducted to confirm the effects of this invention.

Superconducting wire 2 with a diameter of 0.7 and a IIIS Cu ratio of 2.0.
When forming seven rectangular twisted wires, each day - as shown in Figure 8.
When the positions of the wire axes are the same, the stranded wires 6, which were twisted together in a rectangular shape upon exiting the twisting die 5 (Fig. 8B1), lost their rectangular shape when being formed in the tax head roll 7.

On the other hand, if the roll axis of the roll 12 for forming the upper and lower surfaces is moved slightly to the upstream side so that the stranded wire 6 having an approximately rectangular shape comes into contact with the roll 12 for forming the upper and lower surfaces first, when forming the roll 12 in the tax roll 7, There was no collapse of the rectangular shape.

The present invention can be applied not only to superconducting shaped rectangular stranded wires but also to shaped rectangular stranded wires in general.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an outline of a manufacturing apparatus for forming flat stranded wire. FIG. 2 is a plan view showing the twisted wire 6 having an approximately rectangular shape after leaving the twisting die 5. FIG. FIG. 3 is a cross-sectional view of the stranded wire 6 of FIG. FIGS. 4 and 5 show a state in which the proper twisted state of the twisted wires 6 has been disrupted. FIG. 6 shows how the rad roll 7 is arranged on the tax. FIG. 7 shows a part of the rad roll 7 shown in FIG. 6 on an enlarged scale. FIG. 8 shows the working state of the tax roll 7 divided into a side surface forming roll 11 and an upper and lower surface forming roll 12. FIG. 9 is a cross-sectional view of the strand 1 for explaining the forming action of the one-tack Radroll 7. FIG. 10 is a sectional view taken along line EF in FIG. 8. Figure 11 to 1
FIG. 3 is a diagram corresponding to FIG. 8, and shows characteristic parts of each embodiment of the present invention. In the figure, T, 1.1a is a bare wire, 2 is a bobbin, 5 is a twisting die, 6 is a stranded wire with an approximate rectangular shape, 7 is a tax head roll, 8 is a forming rectangular stranded wire, 11 is a roll for forming side surfaces , 11a is the position of the roll axis of the roll 11 for forming the side surface, 12 is the roll for forming the upper and lower surfaces, 12a is the position of the roll axis of the roll 12 for forming the upper and lower surfaces, and A is the position of the stranded wire 6 and the roll 11 for forming the side surface. C is the contact start point between the stranded wire 6 and the upper and lower surface forming rolls 12, and D is the contact end point between the stranded wire 6 and the upper and lower surface forming rolls 12. Jar figure 6

Claims (5)

[Claims] (1) A stranded wire consisting of a plurality of strands twisted together without a core and pre-shaped into an approximate rectangular shape is passed through a tax head roll consisting of a roll for forming the top and bottom surfaces and a roll for forming the side surfaces to form the desired shape. In the apparatus for manufacturing a shaped rectangular stranded wire having a rectangular shape, the position of the roll axis of the roll for forming the upper and lower surfaces is arranged upstream of the position of the roll axis of the roll for forming the side surface, and the rectangular shape is An apparatus for manufacturing a shaped rectangular stranded wire, characterized in that the upper and lower surface shaping rolls are brought into contact with the shaped stranded wire first. (2) The contact end point (D) between the stranded wire and the curve forming roll is at the same position or downstream of the contact start point (A) between the stranded wire and the side surface forming roll. Manufacturing of the shaped rectangular stranded wire according to claim 1 in
. (3) The contact end point (D) between the m11 and the upper and lower surface molding rolls is located upstream of the contact start point (A) between the - line and the side surface molding rolls, An apparatus for manufacturing a shaped rectangular stranded wire according to claim 1. (4) The contact end point (D) between the stranded wire and the upper and lower surface forming rolls is measured from the contact starting point (A) between the stranded wire and the side surface forming roll [A B ]. co
A production location vi of the shaped rectangular stranded wire according to claim 3, which is located on the downstream side of the point (G) of sθX (1/2). However, [AB] indicates the distance that one strand extends on the flat surface of the stranded wire, and θ does not indicate the twisting angle. (5) The apparatus for manufacturing a shaped rectangular stranded wire according to any one of claims 1 to 4, wherein the shaped rectangular stranded wire is a superconducting shaped rectangular stranded wire.