Electric heating – Metal heating – For bonding with pressure
Patent
1989-10-20
1992-02-18
Lateef, Marvin M.
Electric heating
Metal heating
For bonding with pressure
219 64, B23K 1106
Patent
active
050896822
ABSTRACT:
A roller electrode combination for use in electric-resistance welders, the electrode having relatively rotatable components separated by very small gaps, and an electrically and thermally conductive liquid is contained by the components across the gaps; the conductive liquid being a gallium dominant composite eutectic mixture where its phase change from liquid to solid begins at possibly 5-8 degrees C. Special controls are provided for the coolant for the roller electrodes, including a sensor to determining its temperature and a heater to preclude its flow through the roller electrode at temperatures below where such phase change might take place. The roller electrodes may be formed of alloys of copper (Cu) and/or a sintered mixture of copper (Cu) and tungsten (W). A protective coating between 0.0025 and 0.025 millimeters thick may be plated on surfaces of the composite copper (Cu) and tungsten (W) roller electrode that come in contact with the conductive liquid. The coating may be of gold and/or of the platinum family, such as rhodium (Rh) and iridium (Ir).
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Metal Publication (1955), Dr. H. Spengler.
Lateef Marvin M.
Lind Charles F.
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