JPH07161246A - Manufacture of superconducting flat type molded stranded wire - Google Patents

Abstract

PURPOSE:To achieve manufacturing in a condition that a strand is tightened to improve settlement, in a superconducting flat type molded stranded wire used in a superconducting saddle type magnet or the like. CONSTITUTION:Superconducting element wires 2 are drawn out from supply reels 3 set up in a rotational gage of a wire stranding machine, to remove a bending habit of this element wire by a linearity correcting device 8. These element wires are stranded with each other via a guide 5 and a mandrel 6 and molded by molding rolls 7. By this method, the element wires after being stranded are prevented from floating and arranging disorder, to obtain a stranded wire of improving tightening with good arrangement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a superconducting rectangular shaped stranded wire used in an accelerator, a superconducting saddle type magnet for generating a strong magnetic field, etc., in which a stable shape can be obtained by eliminating the floating of the wires. Regarding

[0002]

2. Description of the Related Art Superconducting rectangular flat stranded wire 1 as shown in FIG.
Is manufactured by the method shown in FIG. In the figure, 3 is a supply reel set in a rotating cage (not shown) of the wire twisting machine. In the conventional method of FIG. 4, the superconducting wire 2 wound on the supply reel 3 is drawn out by the winding device 4 so that the cross section of the superconducting wire 2 changes from a circular shape to a thin plate shape through the guide 5. It is twisted around the mandrel 6 and compression-molded in the vicinity of the tip of the mandrel by a forming roll (generally a four-way roll) 7 to have a rectangular cross-sectional shape shown in FIG.

[0003]

The superconducting wire 2 fed from the supply reel 3 is provided with a bend along the winding drum of the reel. Even if tension is applied to the twisted wire, a part of it does not disappear, and as a result, the strands in the twisted wire are floated, and after the twisted wire, the float remains and the twist is softened. And the twisted wires were not well organized.

An object of the present invention is to eliminate such a problem.

[0005]

In order to solve the above-mentioned problems, in the present invention, the superconducting wire drawn from each supply reel is passed through a straightening device, and straightening by this device removes the bend. A method of collecting strands on a mandrel, twisting them together, and then forming them with a forming roll is adopted.

[0006]

When the wire is bent between both sides of the stranded wire, that is, between points A and B in FIG. 3 (a) (this is approximately ½ of the twisted pitch length), the wire is bent as shown in FIG. 3 (b). In the Y-axis direction, the gap between the strands varies, and the strands float in the Z-axis direction in FIG. 3B, so that the twisting of the strands deteriorates. Since the bending habit is removed, the straightness of the wire between the points A and B is increased, so that the wires are aligned and a stranded wire with good cohesion is obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the manufacturing method of the present invention will be described with reference to FIGS. 3 in the drawing is a supply reel set in the cage of the twisting machine, 4 is a winding device for winding the completed superconducting rectangular flat twisted wire 1, 5 is a guide, and 6 is a mandrel whose cross section changes from a circular shape to a thin plate shape. , 7 are forming rolls. These elements are the same as those used in the conventional method.

According to the present invention, a straightening device 8 is installed between the supply reel 3 and the guide 5, and the wires drawn from each supply reel are individually passed through the straightening device and guided onto the mandrel 6. The straightening device 8 is, as shown in FIG. 2, a straightening roll in which a plurality of rolls 9 are alternately opposed to each other, or a wire fed from the supply reel 3 is bent in a direction opposite to that of a straightening tool near the reel. Use something that bends.

As described above, when each of the superconducting wires 2 is passed through the straightening device 8, the mandrel 6 is improved in the straightness.
Align on the above concentric circles, slide on the mandrel while maintaining the aligned state, and slide into the gap of the size of the wire between the mandrel 6 and the forming roll, with a slight margin added. Since the molding roll 7 performs compression molding immediately after leaving the tip of the mandrel, the arrangement of the strands is stable, the gap between the strands is not displaced and the strands are not lifted up, and a tightly twisted wire can be formed.

As a test, according to the method of the present invention, a rectangular shaped stranded wire having a superconducting wire diameter of 0.81 mm, a total number of 30 wires and a length of 30,000 m was produced, and it was well united and tightly tightened. A superconducting rectangular shaped stranded wire was obtained.

[0011]

As described above, according to the method of the present invention, it is possible to obtain a superconducting rectangular shaped stranded wire in which the strands are well united and well tightened. When manufacturing a superconducting saddle-type magnet for acceleration or for generating a strong magnetic field for other purposes, winding tightly-formed stranded wire improves workability and improves the quality of the completed magnet. Therefore, the method of the present invention can be said to be a meaningful method in this respect.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a manufacturing method of the present invention.

FIG. 2 is a diagram showing a schematic configuration of an example of a straightening device.

[FIG. 3] (a): Perspective view of superconducting rectangular shaped twisted wire (b): Cross-sectional view of the above twisted wire

FIG. 4 is an overall schematic view of a conventional manufacturing method.

[Explanation of symbols]

 1 Superconducting rectangular shaped stranded wire 2 Superconducting element wire 3 Supply reel 4 Winding device 5 Guide 6 Mandrel 7 Forming roll 8 Straightening device 9 Roll for straightening

Claims (1)

[Claims] 1. A superconducting flat-angle forming process in which superconducting element wires drawn from a plurality of supply reels installed in a rotating cage of a twisting machine are twisted together, and further passed through a forming roll near the twisted portion to form a rectangular cross-sectional shape. A method for producing a superconducting flat rectangular shaped twisted wire, comprising: passing a superconducting element wire drawn from each supply reel through a straightening device before twisting the twisted wire to remove the twisting.