Ultra-narrow gap TIG (tungsten inert gas) hot wire welding method

• Main Authors: WANG XINGLONG, JIA XIAOLEI, TIAN XIAOLIN, LAN HU, ZHAO DELONG, DU SHIZHONG, BAO KONG, ZHANG HUAJUN
• Format: Patent
• Language: English
• Published: 30.09.2015
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention provides an ultra-narrow gap TIG (tungsten inert gas) hot wire welding method. The method comprises steps as follows: S1, a groove of a window plate test plate is subjected to machining and assembly work before welding; S2, the window plate test plate is preheated; S3, backing-welding weld bead configuration for the ultra-narrow gap TIG hot wire welding is performed; S4, backing welding parameters are set, and backing welding is performed. According to the ultra-narrow gap TIG hot wire welding method, the problem that the backing welding is difficult and consumes long time during ultra-narrow gap TIG hot wire welding of the window plate is emphatically solved, and the welding defects of incomplete side wall fusion, discontinuity of weld beads, poor weld seam formation and the like generated in the welding process easily are overcome. Therefore, high-efficiency and high-quality ultra-narrow gap backing welding of the window plate is realized; the welding quality and the welding efficiency are improved, the working environment is improved, the preheating frequency is reduced, the production cost is reduced, and high use value and economic benefits are achieved.