Spot welding electrode and method for welding coated metals ther

Details Spot welding electrode and method for welding coated metals ther Spot welding electrode and method for welding coated metals ther

1992-09-28

1994-09-20

Evans, Geoffrey S.

Electric heating

Metal heating

For bonding with pressure

2191171, B23K 1111, B23K 1130

Patent

active

053491530

ABSTRACT:
A spot welding electrode designed for welding coated metals such as galvanized steel and a method of welding coated metals using the spot welding electrode. The electrode includes a housing having a hollow cavity with an open end and a closed end. The cavity is surrounded by a cooling wall which has an outer surface and a parallel inner surface. The parallel surfaces provide a substantially improved and consistent cooling method for maintaining temperature at the electrode-workpiece interface below the melting point of the coating. The bulk of the heating during the weld cycle is focused at the interface of the workpiece.

REFERENCES:
patent: 4476372 (1984-10-01), Prucher
patent: 4588870 (1986-05-01), Nadkarni et al.
patent: 4678887 (1987-07-01), Nagel et al.
patent: 4728765 (1988-03-01), Prucher
patent: 4734555 (1988-03-01), Ferguson
patent: 4760235 (1988-07-01), Flater

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