LASER WELDING METHOD FOR DIFFERENT KIND OF METAL

PURPOSE:To prevent deformation of welded member and maintain joining strength in laser welding of a high melting point member to be welded and a base metal to be welded of different kind by irradiating a laser beam from the base metal side and forming a nugget of the base metal around the high melti...

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Bibliographische Detailangaben
Hauptverfasser:	NISHIMOTO TAKEO, OOMORI SOUICHI, FUKUHARA SHIGETOMI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent deformation of welded member and maintain joining strength in laser welding of a high melting point member to be welded and a base metal to be welded of different kind by irradiating a laser beam from the base metal side and forming a nugget of the base metal around the high melting point member. CONSTITUTION:In the cathode of an electronic tube, a coil heater consisting of high melting point thin wire such as W, Mo etc. and a heater support 3 consisting of an Ni plate are positioned. Then, a coiled connecting part 2a is pressed against the heater support 3 by a pressing plate 10 and brought into close contact. Welding is performed by irradiating a converged beam 11a of a laser device 11 from the heater support 3 side. By this way, the heater support 3 is molten and flows to the coiled connecting part 2a side. A nugget 3b of the heater support 3 encloses and diffuses the coiled connecting part 2a without causing deformation and maintains joining strength.