| 摘要 |
PURPOSE:To avoid a stress concentration on weld zones to require a seal and to improve the strength of the weld zones by forming a spot facing groove penetrating up to the lower part of clad layers and covering a strap plate in a state with filler metals inserted into the spot facing groove to weld the strap plate to the clad layers. CONSTITUTION:A part of the clad layers 1 is removed and base metals 2 are exposed to form a welding groove and the spot facing groove penetrating up to the lower part of the clad layers 1 is formed. Then, after a welded joint 4 to connect base metals 2 mutually by the welding groove is formed, the filler metals 5 in a split state is inserted into the spot facing groove and a spacer 10 is inserted between both the filler metals 5 and intervals between the filler metals 5 and the spacer 10 are tack-welded. Next, the strap plate 6 is inserted between the clad layers 1 in an opposed state and the butt welding is performed by the welding groove 3 to constitute the sealing structure by the weld zones 7. Since both the clad layers 1 are connected with the strap plate 6 almost rectilinearly, the concentrated stress does not take place on the clad layers and the strength can be improved.
|
