Electrode roll

Details Electrode roll Electrode roll

1986-08-19

1988-11-01

Goldberg, E. A.

Electric heating

Metal heating

For bonding with pressure

219 81, B23K 1106, B23K 3500

Patent

active

047822074

ABSTRACT:
An electrode roll for an electric resistance seam welding machine comprises a stator substantially made of copper or a copper alloy, a rotor mounted on the periphery of the stator, and substantially or in part made of copper or a copper alloy and rotatably a gap portion formed by the stator and the rotor. A conductive liquid metal, which is a fusible alloy composed mainly of gallium, is inserted in the gap portion through a filling hole and is sealed in the gap portion. At least the portion of the filling hole that may come in contact with the conductive liquid metal is fabricated of a metal or metal alloy which is hard to be corroded by the fusible alloy. The remaining surfaces of both rotor and stator facing the gap portion are covered with a layer or layers of a metal or metal alloy that is hard to be corroded by the fusible alloy. In at least one embodiment, such layer or layers are further covered with another thin layer of metal which has an excellent wettability by the fusible alloy.

REFERENCES:
patent: 3501611 (1970-03-01), Opprecht
patent: 4188523 (1980-02-01), Kawai et al.
patent: 4433229 (1984-02-01), Morikawa et al.
patent: 4642437 (1987-02-01), Yamamoto et al.

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