Patent Number: 6,297,473

Title: Arc welding method

Abstract: In order to provide a welding system capable of freely controlling dispersion and concentration of arc heat input at a groove face of base material, and ensure melting of the base material while restraining excessive weld heat input, in arc welding using a wire consumable electrode system, at a groove between members to be welded a position of a weld torch or feed speed of a wire is periodically varied, and welding is carried out by controlling a difference between the phase of the variation and a phase of an arc current waveform in accordance with a change in the arc current waveform.

Inventors: Hiraoka; Kazuo (Ibaraki, JP), Nakamura; Terumi (Ibaraki, JP), Yamamoto; Hideyuki (Osaka, JP)

Assignee: Japan as represented by Director General of National Research Institute for Metals

International Classification: B23K 9/173 (20060101); B23K 009/12 ()

Expiration Date: 10/02/2018