JPH01262017A - Apparatus and method for manufacturing oxide superconducting wire - Google Patents

Abstract

PURPOSE:To manufacture an oxide superconducting wire of a suitable length by enclosing a superconducting material with a thin sheet material to make a wire rod and performing necessary operations such as joining and heat- treatment, etc., to the thin sheet material. CONSTITUTION:The superconducting material feeder 3 is provided, a central member 4 and the superconducting material 12 are enclosed, corrective rollers 5 to enfold the thin sheet material 1 are arranged and a die 6 having a built-in high frequency coil 8 is prepared. First, the thin sheet material 1 is formed by forming rollers 2 into a U-shape, this groove is packed with superconducting material 12 and the central member 4 is arranged. Then, after the thin sheet material 1 is formed by the corrective rollers 5 into the wire rod, the sheet material 1 is supplied to the die 6, heated by the high frequency coil 8, diffused and joined, and the superconducting material 12 is heat-treated by the thermal conductivity caused at that time. Thus, the oxide superconducting wire having arbitrary properties can be manufactured.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a superconducting wire manufacturing apparatus and its manufacturing method.

(Prior Art) Conventional superconducting wires have been manufactured by drawing with rollers. A conventional method for manufacturing a superconducting wire will be described with reference to FIGS. 5 and 6. First, as shown in FIG. 5, a wire mass 10 is prepared by sealing a superconducting material 12 inside a metal container 9 having excellent malleability and serving as a sheath material for the superconducting wire. Then, as shown in FIG. 6, this wire rod mass 10 is
A wire rod of a predetermined thickness is produced by inserting the wire rod between llb and drawing. Furthermore, superconducting wires were manufactured by heat-treating this wire for a long period of time at a temperature that produced superconducting properties.

(Problem to be Solved by the Invention) However, since the superconducting wire manufactured by the conventional manufacturing method is manufactured by wire drawing, there is a limit to the wire length that can be manufactured due to the processing rate. Furthermore, since the outer skin material is limited to metals with excellent malleability, it is necessary to use noble metals such as silver.

Therefore, in order to solve the above problems, the present invention aims to provide a superconducting wire manufacturing apparatus and its manufacturing method that can manufacture a superconducting wire of any length without using any special material for the outer sheath material. do.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a U-shaped thin sheet material.
A forming section that forms the U-shaped thin sheet material into a shape, a superconducting material supply section that fills the U-shaped groove of the U-shaped thin sheet material with a superconducting material, and a wire rod that straightens the U-shaped thin sheet material filled with the superconducting material into a tubular shape. The oxide superconductor has a straightening part that forms a straightening part, and a die into which this wire is inserted, and a heating part that performs heat treatment of the superconducting material in the Makki wire material and diffusion bonding of the overlapping part of the thin sheet material is built into the die. Wire manufacturing equipment and a continuous thin sheet material with a U-shaped cross section are filled with superconducting material, the filled thin sheet material is straightened into a tubular shape to form a wire rod, and the wire rod is heated to heat-treat the superconducting material. A method for manufacturing an oxide superconducting wire is provided, which comprises performing diffusion bonding of overlapping parts of thin sheets.

(Function) The U-shaped thin sheet material filled with the superconductor is straightened into a tubular shape to form a wire rod, and by inserting the wire rod into a die, the wire rod is heat-treated by the heating section of the die. At this time, the superconductor is heat treated and the overlapping portion of the thin sheet material is pressed against the die, making it possible to perform diffusion bonding of the overlapping portion.

(Example) An example of a superconducting wire manufacturing apparatus and a manufacturing method thereof according to the present invention will be described with reference to FIGS. 1 to 4.

Reference numeral 2 denotes a forming roller that forms a thin plate sheet 1, which will become the outer coating of the superconducting wire, into a U-shape. A superconducting material supply device 3 that supplies material 12 is installed. Further, a core material 4 having a high coefficient of expansion is supplied to the center of this U-shaped groove from a core material feeder (not shown). Then, the U
A straightening roller 5 that winds up the thin sheet material 1 formed into a letter shape is installed in front of the core material 4 in the axial direction to be supplied. Further, a ceramic die 6 is installed adjacent to the correction roller 5, and the thin sheet material 1, which has been formed into a wire by the correction roller 5, is inserted into the die 6. This die 6 has a built-in high frequency coil 8. The thin sheet material 1 is heated in a vacuum or inert atmosphere chamber 7 for the purpose of preventing oxidation.

Next, a method for manufacturing a superconducting wire using such an apparatus will be explained. A thin sheet material 1 is formed into a U-shape by a forming roller 2, and superconducting wire material 12 is filled into the U-shaped groove. A core material 4 having a high coefficient of thermal expansion is placed in the center thereof.

Superconducting wire material 1 filled in the U-shaped groove of thin sheet material 1
2 and the core material 4 are rolled into the thin sheet material 1 by a straightening roller 5. The thin sheet material 1 made into a wire is supplied to a racemic die 6. The thin sheet material 1 which has been made into a wire and supplied into the die 6 is heated by the high frequency heating coil 8 incorporated inside the die 6. When the thin sheet material 1 is heated, the movement (movement) of the atoms of the thin sheet material becomes active and diffusion bonding becomes possible. Therefore, the thin sheet material 1 is pressed against the inner surface of the die 6 by the core material 4 expanded by heating, and the vertical joints of the thin sheet material 1 are diffusion bonded. Further, the superconducting wire is heated from the inner and outer peripheries by heat conduction between the thin seamil material 1 and the core material 4, and an oxide superconducting wire is formed by this heat treatment. Furthermore, as shown in FIG. 4, the thin sheet materials 1 can be connected in the circumferential direction, and oxide superconducting wires can be manufactured without being limited by length. Further, it is possible to prevent variations in superconducting properties due to variations in the superconducting wire during the drawing process. Furthermore, thin sheet material 1
By changing the type of superconducting material 12 supplied to the U-shaped groove, a superconducting wire having arbitrary characteristics in an arbitrary section can be manufactured.

can.

〔Effect of the invention〕

According to the present invention, by wrapping the superconducting material in a thin sheet material and heating it, diffusion bonding of the thin sheet material and heat treatment of the superconducting material are performed, so an oxide superconducting wire with arbitrary characteristics and any length can be manufactured. Oxide superconducting wires can be easily manufactured without using

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of an apparatus for producing an oxide electromotive wire according to the present invention, FIG. 2 is a longitudinal cross-sectional view of a die, FIG. 3 is a cross-sectional view of a die, and FIG. 4 is a thin plate. A vertical cross-sectional view of the die showing the joining part to the seam 1, and FIGS. 5 and 6 are vertical cross-sectional views showing the conventional manufacturing process of superconducting wire. 1 - Material to thin plate sheet 1 2... Forming roller 3 - Super electric feeder 5 - Straightening roller 6 - Die
8...High frequency coil 12 Superconducting material agent Patent attorney Nori Chika Ken Yudo Daishimaru Ken 1 Top Figure 3 Figure 6 Figure 4

Claims (2)

[Claims] (1) A forming section that forms a thin sheet material into a U-shape, a superconducting material supply section that fills the U-shaped groove of the U-shaped thin sheet material with a superconducting material, and a U-shaped thin sheet filled with the superconducting material. a straightening section that straightens the material into a tubular shape to form a wire;
Production of an oxide superconducting wire characterized in that the die has a die into which the wire is inserted, and the die has a built-in heating section for heat-treating the superconducting material in the wire and diffusion bonding the overlapping portion of the thin sheet material. Device. (2) A continuous thin sheet material with a U-shaped cross section is filled with superconducting material, the filled thin sheet material is straightened into a tubular shape to form a wire rod, and this wire rod is heated to heat-treat the superconducting material and form a thin sheet material. 1. A method for manufacturing an oxide superconducting wire, characterized by performing diffusion bonding of a polymerized portion of the oxide superconducting wire.