Electric heating – Metal heating – Of cylinders
Patent
1989-06-13
1992-03-24
Shaw, Clifford C.
Electric heating
Metal heating
Of cylinders
219 75, 21912511, B23K 912
Patent
active
050990985
ABSTRACT:
Arc welding apparatus and method for precisely welding abutting pipe end portions defining an interface having a seam or joint to welded. The apparatus includes a roller assembly for precisely rolling the apparatus around a track circumscribing one of the pipe portions so that the seam may be suitably welded. Connected to the roller assembly is a carriage which carries an electrode housing having an electrode housed therein. A gear rack is provided on the roller assembly for engaging a pinion gear on the carriage for precisely biasing the carriage and thus the electrode housing parallel to the longitudinal center axis of the pipe portions. Connected to the carriage is a lead screw assembly for precisely biasing the electrode housing and thus the electrode perpendicularly to the longitudinal center axis of the pipe portions to be welded. Connected to the electrode housing is a manipulator arm for precisely manipulating filler wire at the weld site.
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Exhibits 1-16: Engineering drawings showing welding device commercially available from Dimetrics, Inc., located in Diamond Springs, Calif., a subsidiary of Talley Industries Company.
Shaw Clifford C.
Stevens Walter S.
Westinghouse Electric Corp.
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