Apparatus for coating a pipe surface

Details Apparatus for coating a pipe surface Apparatus for coating a pipe surface

2011-03-29

2011-03-29

Ralis, Stephen J (Department: 3742)

Electric heating

Metal heating

For deposition welding

C219S061100, C219S137310, C118S215000, C118S306000, C118S317000

Reexamination Certificate

active

07915561

ABSTRACT:
A wear resistant coating is applied on an elbow or S-bend by weld beads applied along a pipe. A rectangular support rod is attached inside the pipe by connectors so that wheels of the carriage are guided on the corners to maintain a fixed orientation relative to the support rod. A three axis robot arm carries an electric welding head so as to be able to dynamically adjust the head both angularly and radially. A welding wire is pulled to the head by a feeding system on the carriage. The weld parameters including a predetermined wire stick out and angle of wire attack are controlled. A drive motor carried by a drive carriage propels the drive carriage longitudinally along the support rod with a series of intermediate carriages.

REFERENCES:
patent: 4513443 (1985-04-01), Louttit
patent: 4988215 (1991-01-01), Osawa
patent: 5362962 (1994-11-01), Barborak et al.
patent: 6171389 (2001-01-01), Anderson
patent: 6274845 (2001-08-01), Stava et al.
patent: 2002/0007548 (2002-01-01), Stoewer et al.
patent: 2302083 (2000-10-01), None
patent: 06142930 (1994-05-01), None

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