Metal fusion bonding – Including means to force or clamp work portions together... – Comprising tube aligning means
Patent
1994-10-31
1996-10-29
Bradley, P. Austin
Metal fusion bonding
Including means to force or clamp work portions together...
Comprising tube aligning means
228 493, 269 481, B23K 37053
Patent
active
055688934
ABSTRACT:
An internal welding fixture is disclosed for locating and temporarily retaining two tubular workpieces relative to one another. The internal welding fixture includes a plurality of shoe assemblies, each of the shoe assemblies being radially disposed about a single axis and being radially movable between a contracted position and an expanded position. The shoe assemblies are equally divided into first and second groups of shoe assemblies. The internal welding fixture further includes a drive arrangement operatively connected to each of the shoe assemblies for moving each shoe assembly between its contracted position and its expanded position. The shoes of one of the groups of shoe assemblies are interconnected to the actuator through a delay mechanism which serves to mechanically delay retraction. Upon expansion of the shoe assemblies, the internal welding fixture is operative to reinforce and temporarily retain a joint formed between two tubular workpieces during a joining procedure, such as welding.
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Bradley P. Austin
Cogsdill Tool Products, Inc.
Knapp Jeffrey T.
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