Contact tip for arc welding

Details Contact tip for arc welding Contact tip for arc welding

1990-12-20

1992-03-31

Shaw, Clifford C.

Electric heating

Metal heating

By arc

219136, B23K 926

Patent

active

051010933

ABSTRACT:
A contact tip for arc welding includes a feed surface constructed of conductive material which has a negative thermoelectromotive force with respect to pure platinum at temperatures above 0.degree. C. When welding current flows from the contact tip to a welding wire, an endothermic reaction occurs at the feed surface to lower the temperature of the feed surface and to improve the thermal durability of the contact tip.

REFERENCES:
Thorne, J. Paul, "Aircraft and Commerical Applications of Direct Current Resistance Welding Using Silicon Diodes," Welding Research Suppl., Welding J. 9:282-288, Jun. 1965.
Balder, T. C., "Influence of the Peltier Effect in Resistance Welding," Philips Technical Review, vol. 20:188-192, 1958/59.

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