Metal fusion bonding – Process – With protecting of work or filler or applying flux
Patent
1980-10-30
1983-06-14
Godici, Nicholas P.
Metal fusion bonding
Process
With protecting of work or filler or applying flux
228 46, 269 481, 219 617, 219160, B23K 3106
Patent
active
043878458
ABSTRACT:
The apparatus of the present invention is used for holding and cooling a metal tube during welding. The tube has a cylindrical bore of predetermined diameter extending therethrough. The apparatus comprises a cylindrical mandrel having a bore extending axially therethrough. The bore has a central portion of reduced diameter and has outwardly tapering portions at its opposite ends. The mandrel also has a plurality of elongated axially extending slots formed in the walls of the mandrel so as to permit the mandrel to expand radially outwardly. Cam means are positioned within the mandrel bore and are adapted to be moved to cause outward radial expansion of the mandrel. The method of the present invention comprises placing the mandrel within the cylindrical bore of the metal tube, and expanding the mandrel radially outwardly against the inner surface of the metal tube, so as to hold the tube in place and cool it during welding.
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patent: 3986383 (1976-10-01), Petteys
Godici Nicholas P.
Jordan M.
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