| 摘要 |
PURPOSE:To complety weld the whole thickness of cylindrical members and to obtain weld of the members excellent in strength by providing spigot joint in the vicinities of the outside peripheries of the cylindrical members, tack- weling an outside peripheral part groove and then, subjecting an inside peripheral part groove to full penetration welding. CONSTITUTION:The spigot joint 5 is provided in the vicinities of the outside peripheries of the cylindrical members 1 and 2 and the spigot joint 5 is press- fitted and centering is executed and then, tack welding is performed with the groove 3 as a center of an electron beam by the electron beam output required for melting all of the groove 3 and a part of spigot joint to form a first bead 10 as the opening stop of both members 1 and 2. The center of the beam is then moved to the groove 4 and main welding is performed under welding conditions to execute full penetration to form a second bead 11 and the whole thickness of the members is welded. |
