Welding device and welding method for high temperature superconducting strip

Abstract

The invention discloses a welding device and a welding method for a high temperature superconductive strip. The device comprises a heating plate, a heat conduction temperature equilibrium welding substrate, a silicon rubber pressing piece, a welding pressing plate, a power regulator and bolts. The welding method based on the welding device comprises the following steps: a welding strip is trimmed, welding surface of the high temperature superconducting (HTS) strip is cleaned, scaling powder is coated, the HTS strip is installed, heating temperature and temperature rising speed are controlled when heating starts, welding joints are trimmed after welding is finished and the like. The device is simple in operation, easy to fix and capable of achieving efficient speedability of welding, ensuring evenness of pressure at the positions of the joints, controlling the heating temperature and the temperature rising speed effectively, ensuring evenness of temperature at the positions of the welding joints and preventing excursion of the HTS strip and welding materials at the lap joint position effectively, and therefore effects of the welding materials can not be influenced.

Description

technical field [0001] The invention relates to a welding method of first-generation Bi-2223 and second-generation YBCO high-temperature superconducting (HTS) strips, and designs a simple and effective superconducting strip joint welding device, which belongs to the technical field of superconducting technology. Background technique [0002] With the development of superconducting technology, especially the development of Bi-2223 and YBCO high-temperature superconducting strips, superconducting materials are used in major scientific projects (International Thermonuclear Fusion Experimental Reactor), medical treatment (nuclear magnetic resonance), transportation (maglev Trains) and military and many other fields have been widely used in practice, but as a material application, it is essential to cut or lengthen the high-temperature superconducting strip, so welding is very important for the wide application of high-temperature superconducting materials of. For high tempe...

AI Technical Summary

Problems solved by technology

However, since the electric soldering iron is heated by point or line contact, the surface of the heating area provided is small. For a large welding surface, it is easy to cause the temperature of the local area to be too high, and the solder cannot be heated and melted evenly, which will directly affect the welding quality. ;

[0012] (2) The ordinary welding method adopts the method of first tinning and then welding, so that the superconducting strip needs to withstand the welding high temperature at least twice, which increases the possibility of affecting the welding quality due to excessive temperature rise due to improper welding;

[0013] (3) Ordinary electric soldering irons are heated by contact. During the heating process, the pressure between the electric soldering iron and the strip cannot be controlled. This will easily lead to excessive pressure during the welding process, causing the strip to be crushed and partially damaged. If the pressure is too small, the strip will be damaged. Make the heating slow, thus affecting the welding speed;

[0014] (4) Ordinary welding is to directly weld the strips after they are lapped together, which may lead to offsets in the laps during welding, so that the overlapping surfaces of the strips are not completely overlapped, which directly affects the welding quality

Images