According to the invention a hollow cylindrical shank of electrically conducting metal is connected to a resistance welder. A coolant supply tube passes through the shank and has an interior coolant supply passage. The coolant supply tube has an outer diameter less than the inner diameter of the hollow cylindrical shank. A weld cap seats on the shank and has a cap tip and a cap skirt that depends from the cap tip and is attached to the shank. An underside of the cap tip faces the shank and the supply tube. A coolant receiving bore formed into the underside of the weld cap extends into the cap tip to receive the coolant supply tube part way into the bore. The bore formed into the underside of the cap tip defines a bore sidewall that provides added area of heat transfer contact between the coolant and the cap tip.
M. J. Karagoulis et al., "Method and Apparatus for Improved Cooling of Restistance Welding Cap," U.S. Patents, Jan 2007.
Mechanical and Aerospace Engineering
Patent Application Number
© 2007 GM Global Technology Operations, Inc., All rights reserved.
01 Jan 2007