| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide underwater laser repair welding equipment and an underwater laser repair welding method capable of applying laser repair welding to an underwater structure having a crack with an opening part on the surface, and capable of sealing the opening part on the surface of the crack, and to provide an underwater laser repair welding method. <P>SOLUTION: In the underwater laser repair welding equipment where an underwater welding head connected to a laser oscillator and a shielding gas feed source, and having a feed source and a feed system of welding wire and an optical system condensing laser light is provided, and the part to be welded in an underwater structure is subjected to repair welding: the part of a nozzle 20 fitted to the tip of the underwater welding head 3 is provided with a nozzle central hole 21 applying laser light and feeding shielding gas to the part 34 to be welded in the underwater structure and a precedence hole 22 jetting shielding gas toward the progressing direction of welding separately from the nozzle central hole 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
