Ihi Corporation

Yoshihito Nishimura

Kazuyuki Kobayashi

Tooru Iijima

Kazuo Masumoto

In a multi-electrode welding torch, electrodes () are configured into a shape that has an arc-shaped curved surface area (R) in at least a portion of a cross-section thereof that is orthogonal to the longitudinal direction thereof. Collets () are each provided with a groove portion () in which an electrode () is fitted, and whose inner wall surfaces () come into contact in a plurality of locations with the curved surface area (R) when viewed in the longitudinal direction of the electrode ().

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Tokyo, Japan

Yoshihito Nishimura