Manufacturing method of copper composite niobium-titanium multi-core superconducting enameled wire

Abstract

The invention discloses a manufacturing method of a copper composite niobium-titanium multi-core superconducting enameled wire. The manufacturing method comprises a drawing process and an enameling process, in which the wires are processed through a paying out drum, a winch, a guide disk, a straightening disk, a take-up reel and a drawing mould; in the drawing process and the enameling process, coiling directions of the wires among the neighboring paying out drum, the winch, the guide disk, the straightening disk and the take-up reel are mutually intersected and transformed, so that the wires are coiled in intersected directions; and a friction forced surface alternatively acts on internal and external sides of bent wires, so that compressed deformation at the internal surface of the wire and the drawn deformation at the external surface of the wire are mutually balanced. In the manufacturing method, the friction forced direction and the bending direction of the wires are reasonably distributed, the internal compressed deformation and the external drawn deformation generated by the superconducting wires while being coiled and bent are mutually balanced, and the friction forced surface alternatively acts on the internal sides and the external sides of the bent wires, so that production of copper composite niobium-titanium multi-core superconducting enameled wire products is implemented.

Description

technical field [0001] The invention relates to a method for manufacturing a copper-composite niobium-titanium multi-core superconducting enameled wire. Background technique [0002] In the 1960s, practical superconducting materials such as niobium-zirconium, niobium-titanium and niobium-tin came out one after another, and the research on superconducting applications developed rapidly. Now, superconducting magnet technology has been applied in magnetic fluid power generation, nuclear fusion high-energy physics, superconducting motors and maglev trains, etc. The performance of my country's niobium-titanium multi-filament twisted composite superconducting wires has reached or approached the level of similar products in the world. We have successfully produced solenoid-shaped, racetrack-shaped, U-shaped and saddle-shaped wires with energy storage below 560,000 joules. different types of superconducting magnets. [0003] Ordinary enameled wire is made by the traditional method ...

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Problems solved by technology

[0006] Copper-composite niobium-titanium multi-core superconducting wires have continuous side bending in the same direction during the drawing and painting process, and during the winding process of the wire by the pay-off reel, capstan, guide reel, straightening reel and take-up reel and friction problems, such as Figure 5 As shown, when the superconducting wire is wound and bent, inner compressive deformation 5-1 and outer tensile deformation 5-2 will be generated. When the wire is continuously bent in the same direction and subjected to friction force, inner compressive deformation and outer tensile deformation will be caused. Not equal, it will lead to surface defects in the production process of superconducting wires, resulting in paint quality defects

[0007] The existing common enameled wire production suitable for copper, aluminum, and copper-clad aluminum conductors has the disadvantage of uneven distribution of wire winding friction force and bending, which cannot overcome the same direction side of the wire in the production of copper-composite niobium-titanium multi-core superconducting enameled wire. Surface defects and paint imperfections caused by continuous bending and frictional forces

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