Roller electrodes for electric-resistance welding machine

Details Roller electrodes for electric-resistance welding machine Roller electrodes for electric-resistance welding machine

1987-05-22

1988-10-25

Goldberg, E. A.

Electric heating

Metal heating

For bonding with pressure

219 64, B23K 1106

Patent

active

047805897

ABSTRACT:
A roller electrode combination for use in electric-resistance welder, the electrode having relatively rotatable components separated by very small gaps, and a liquid contained by the components across the gaps; where said liquid is nontoxic, and is highly conductive, both electrically and thermally. The conductive liquid is of a composite eutectic mixture of gallium (Ga), indium (In), tin (Sn) and zinc (Zn), by weight, being approximately 61% Ga, 25% In, 13% Sn, and 1% Zn. A protective coating of the order between 0.0025 and 0.025 millimeters thick is plated on said surfaces of at least one of the components, being of material from the platinum family, such as rhodium (Rh). Coolant is circulated through one of the components; and part of the component is formed of a composite mixture of copper (Cu) and tungsten (W). That one component further may have a circumferentially continuous raised rib, on the exterior peripheral face adapted to be closely adjacent and directly engage at least the adjacent of the overlapped edges of the material to be welded.

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.
Spengler, "Niedrigschmelzende Metalle und Legierungen", Metall publication (1955).

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