THE VERTICAL ONE-SIDED AUTOMATIC ARC WELDING PROCESS FOR BUTT JOINTS IN THE ERECTION STAGE OF SHIPBUILDING
The method described in this paper is that in use at Nippon Kokan shipyards for the construction of butt joints of bilge hopper plates. It is based on gas-shielded metal arc welding, the welding torch being oscillated transversely to the welding direction with dwell control. Short circuiting conditions are used for background welding current and voltage, but at the dwell point of oscillation, they are pulsed to spray arc conditions (ss-Arc process). The use of pulsating spray arc for the roots of grooves and both corners of each filling pass considerably reduces the lack-of-fusion defects which are often observed when using short-circuiting arc conditions alone. An outstanding feature of the welding equipment is the push/pull wire feed system in which a 12-m long conduit cable is used to reduce the weight of the welding equipment which is made up of separate sections to allow for one-man operation.
- Proceedings of International Conference on Exploiting Welding in Production Technology, London, April 22-24, 1975.
Welding InstituteAbingdon Hall
Cambridge CB1 6AL, England
- Nomura, H
- Sugitani, Y
- Publication Date: 1975-4
- Pagination: 11 p.
- TRT Terms: Automatic welding; Butt welds; Electric arc welding; Welding
- Old TRIS Terms: Automatic welding systems; One side welding; Welding procedures
- Subject Areas: Bridges and other structures; Construction; Marine Transportation;
- Accession Number: 00152497
- Record Type: Publication
- Source Agency: British Ship Research Association
- Files: TRIS
- Created Date: Apr 27 1977 12:00AM