Welding device and method for superconducting lines

Abstract

The invention relates a welding device and method for superconducting lines. The welding device comprises a heating unit, a welding bedplate, heat insulation blocks and a pressing unit with a support body, wherein the welding bedplate is fastened on the heating unit; the heating unit is provided with a heater and a temperature adjustor; the pressing unit is mounted on the welding bedplate and further comprises pressing pieces and the heat insulation blocks; and the pressing pieces are mounted on the support body and used for pressing a welding head, and the heat insulation blocks are arranged between the welding bedplate and the support body. The welding device and method for the superconducting lines provided by the invention have the advantages of having a large temperature-controlled range, being high in precision, being capable of meeting the temperature control requirement on the welding of the superconducting lines, and further being capable of improving welding quality and alleviating welding dispersiveness through reducing the thickness of a welding layer, enlarging welding area, lowering welding resistance and reducing artificial operation factors.

Description

technical field [0001] The invention relates to a superconducting wire welding device and a welding method, which is particularly suitable for welding between superconducting wires or between superconducting wires and conventional conductors, and between conventional conductors of certain sizes, and belongs to the technical field of superconducting applications. Background technique [0002] Since the production of superconducting wires is limited by technological conditions, when using superconducting wires to make superconducting magnets, current limiters, cables or other equipment, whether Bi2223, YBCO or MgB , its length cannot be infinitely long, or it can be customized section by section according to engineering needs, and the required length can be solved through the connection of wires. Therefore, the connection technology of wires has become a key technology in practical applications. At present, the general superconducting wire welding method in engineering is res...

AI Technical Summary

Problems solved by technology

The manual welding of commercial temperature-controlled electric soldering iron usually adopts the welding method of soldering temperature-controlled electric soldering iron, the temperature control range is usually >200 °C, the heat capacity is small, the temperature fluctuation is large, the heating area is small, and the heating temperature of the welding parts is uneven, which may cause welding Partial overheating of parts, heating temperature in other places is not enough

At the same time, the welding quality of this method depends on the operator, the human factor is large, and the welding quality is highly dispersed.

The clamp-type welding device manually hangs the superconducting wire with solder, melts the solder with an electric soldering iron, and then uses the clamp-type welding device to compress the parts to be welded of the two superconducting wires, and cools naturally. This method can control the temperature range of 120-200 ℃ temperature is difficult to achieve, and the welding quality also depends on the operator, resulting in large dispersion of welded joint quality

[0003]Therefore, the current common welding operation method for resistance welding is manual welding with a commercial temperature-controlled soldering iron. The heating temperature of the welding parts is uneven, and the welding quality depends on the operator. It is difficult to achieve temperature control in the temperature range of 120-200 ℃ with clamp-type welding devices, and there is a problem of large dispersion of welded joint quality. This is a key technology that needs to be solved urgently in superconducting application technology

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