| 摘要 |
1,203,765. Welding by fusion; making superconducting wire. INTERNATIONAL RESEARCH & DEVELOPMENT CO. Ltd. 22 Sept., 1967 [23 Sept., 1966], No. 42596/66. Headings B3A and B3R. [Also in Division H1] Lengths of superconducting material, e.g. wire or strip, are joined end-to-end by laser welding. Butt or lap joints may be used. Materials referred to are niobium-titanium and niobium-zirconium wires drawn from ingots. The laser weld may be performed in air, inert gas, vacuum or liquid. A cable may be formed of several wires each made by laser welding lengths of superconducting wire end-to-end and plating the welded wire with copper or aluminium. The joints in the adjacent wires are staggered and the assembly is surrounded by a wrapping of copper or aluminium wire. The laser may be a ruby or neodymium-in-glass laser and may produce a beam of circular or rectangular section. A laser welding machine has clamps for holding wires to be welded. The wires are viewed through a microscope arrangement having a binocular eyepiece 10, a removable prism 11 and an objective lens system 9. After removal of the prism 11, the beam from a ruby laser 6 is directed on to the work by a prism 8 and the lens system 9. |
