This paper describes the development of automatic underwater welding system based on an unique localized dry environment by a fluid curtain. With only the welding machine submerged, the system is operated by remote control in the ocean in connection with materials supply and supervision of works, thus considerably reducing its reliance on diving and underwater operations. In this process, a stabilized gaseous zone can be created only around the welding spot just underneath the welding torch by inclined water jet stream from the outer circumference of the double nozzle. Then various gas shielded arc welding methods such as TIG, MIG and CO2 arc welding are performed in the dry environment. As the initial plan, a submersible automatic welding machine has been produced, and the trial test of this system has been successfully performed on objects submerged in a large cistern while supervising and controlling their welding conditions by TV monitoring from outside the cistern. Welding results have proved excellent, being not much different from those undertaken in an ordinary environment on land.

Media Info

  • Features: References;
  • Pagination: p. 333-344

Subject/Index Terms

Filing Info

  • Accession Number: 00138250
  • Record Type: Publication
  • Source Agency: Offshore Technology Conference
  • Report/Paper Numbers: V3, OTC 2646 Proceeding
  • Files: TRIS
  • Created Date: Sep 4 1976 12:00AM