Babcock-hitachi Kabushiki Kaisha

Nobuwo Nakazawa

Katsuyoshi Hori

Toshiaki Takuwa

Toshiharu Nagashima

Yosiaki Matsumura

Yukio Hosono

Tetsuji Terada

Yuji Futami

An excellent welding tip in the feed stability of a wire, in the release capacity of foreign matter, and in the stability of current control, and a process for manufacturing such a tip economically, is achieved in accordance with a sectional shape of a guide hole opened and provided to a welding tip. The sectional shape is derived by forming a wire in a passable non-circular shape. The sectional shape of the guide hole may be a polygonal or elliptic shape, or approximately so. In the case of making the sectional shape of the guide hole polygonal, it is more preferable to make it a polygon circumscribing on a circle, for example, such a polygon circumscribing on a larger circle than the outer diameter of the wire to be inserted into the guide hole by 0.02-0.20 mm in diameter. Specifically, it is preferable to arrange the sectional shape as a triangle.

Tips for welding and their manufacturing process

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Kure, Japan

Nobuwo Nakazawa