In situ method for remotely operated, automatic contour mapping,

Details In situ method for remotely operated, automatic contour mapping, In situ method for remotely operated, automatic contour mapping,

1994-12-27

1996-05-14

Ramsey, Kenneth J.

Metal working

Method of mechanical manufacture

Repairing

21912421, 21912434, 228102, 228119, 376260, B23K 3702

Patent

active

055155898

ABSTRACT:
A method for upgrading/repairing existing piping systems of a nuclear reactor without removal/replacement of the old piping. The process involves the steps of machining a counterbore of exposed corrosion-susceptible material and then depositing a corrosion-resistant weld material, thereby isolating the weld joint from corrosion susceptibility. A tool is inserted into the inside diameter of the piping system through an inspection port, valve body or segment removal. Then a tool mounting fixture equipped with axial and rotational capabilities is positioned in relation to the weld joint and locked in place. The tool mounting fixture remains locked in place throughout the entire repair process. A work surface mapping module is programmed to first gather relative reference points throughout the entire repair region. Upon data acquisition completion, the system creates a map of the existing inside diameter configuration. Then in successive stages, a machining head module and a welding head module are respectively manually installed and remotely operated by computer control. The machining and welding processes follow the existing configuration such that upon completion, the final repair blends with the piping inside diameter contour.

REFERENCES:
patent: 4624402 (1986-11-01), Pitcairn et al.
patent: 5107093 (1992-04-01), Ekelof et al.
patent: 5408883 (1995-04-01), Clark, Jr. et al.
patent: 5434895 (1995-07-01), Domy et al.

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