Automatic pipe welding apparatus and method
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United States of America Patent
Stats
-
Aug 12, 1980
Issued Date -
N/A
app pub date -
Mar 17, 1978
filing date -
Feb 11, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An expandable band is employed to provide a mold on the interior of the joint into which the weld puddle is flowed which may be made of any appropriate material, but preferably is copper. The back-up band is carried on a set of rounding jacks which engage the facing pipe ends and exert a circumferentially uniform radial force on the pipes. This serves to round the ends equally and bring them into coaxial alignment with each other in the vicinity of the joint. The back-up band bridges the joint and expands to form a closed or semi-sealed chamber around the joint.
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Cited Art Landscape
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