METHOD AND EQUIPMENT FOR WELDING BY THERMIT REACTION HEAT

• Main Authors: SATO KIMIHARU, HOSHI SHUICHI, YANO KAZUNORI, SATO YOSHIMITSU
• Format: Patent
• Language: English
• Published: 30.09.1997
• Edition: 6
• 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

PROBLEM TO BE SOLVED: To provide a method and an equipment for welding by the thermite reaction heat capable of preventing a concave cavity of a weld zone of a connection piece, and facilitating the die opening of a container for the heating agent after the welding. SOLUTION: In a welding method in which non-ferrous materials 9 to be welded are stored in a splittable welding equipment across a welding material 8, and the welding material 8 is heated and melted by the thermite reaction heat, the coating material whose thermal conductivity in the heated and melted condition is >=0.006 cal/sec/cm / deg.C/cm is applied to an inner surface of the splittable welding equipment. The welding equipment comprises a cylindrical container 2 for the heating agent, the heating agent 7 to generate the thermite reaction to be charged in the container 2 for the heating agent, a splittable, cylindrical holding member 3 to be arranged in the container 2 for the heating agent, and a hooking piece 4 to fit the holding member 3, and a coating layer of the coating agent whose thermal conductivity in the heated and melted condition is >=0.006 cal/sec/cm / deg.C/cm is formed on an inner surface of the splittable, cylindrical holding member 3.