Electric heating – Metal heating – By arc
Patent
1994-04-21
1997-06-03
Shaw, Clifford C.
Electric heating
Metal heating
By arc
219136, B23K 924
Patent
active
056350910
ABSTRACT:
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.
REFERENCES:
patent: 2379470 (1945-07-01), Baird
patent: 2756310 (1956-07-01), Galbraith
patent: 2965746 (1960-12-01), Cresswell
patent: 3025387 (1962-03-01), Kinney
patent: 3038059 (1962-06-01), Hinrichs
Patent Abstracts of Japan, vol. 16, No. 137 (M-1231), Apr. 7, 1992, and JP-A-03 297 574 (Babcock Hitachi KK), Dec. 27, 1991, *abstract*.
Patent Abstract of Japan, vol. 13, No. 193 (M-822), May 9, 1989, and JP-A-01 018 582 (Masami Fujimoto) Jan. 23, 1989, *abstract*.
Futami Yuji
Hori Katsuyoshi
Hosono Yukio
Matsumura Yosiaki
Nagashima Toshiharu
Babcock-Hitachi Kabushiki Kaisha
Shaw Clifford C.
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