Repair device and repair method
AssigneeMitsubishi Heavy Industries, Ltd.
InventorKen Onishi
Life of this patent
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Abstract
This repair device includes a casing, a slide shaft slidably arranged with respect to the casing, a turn table rotatably arranged with respect to the slide shaft, a cutting mechanism installed on the turn table and including a cutting tool, and an advancing and retracting mechanism that displaces a radius of rotation of the cutting mechanism with respect to rotations of the turn table forward and backward. In a state where the casing is centered and positioned with respect to the pipe, the turn table is rotationally displaced while the slide shaft slides in an axial direction, and the advancing and retracting mechanism displaces the cutting mechanism forward and backward. Accordingly, the cutting tool helically turns along an inner peripheral shape of the pipe to cut an inner periphery of the pipe.
Claims6
A repair device that repairs a welded part on an inner peripheral side of a pipe, comprising:
- a casing;
- a slide shaft slidably arranged with respect to the casing;
- a turn table rotatably arranged with respect to the slide shaft;
- a cutting mechanism installed on the turn table and including a cutting tool for cutting the welded part;
- and an advancing and retracting mechanism that displaces a radius of rotation of the cutting tool with respect to rotations of the turn table forward and backward by displacing the cutting mechanism forward and backward, wherein
- in a state where the casing is positioned with respect to the pipe, the turn table is rotationally displaced while the slide shaft slides in an axial direction, and the advancing and retracting mechanism displaces the cutting tool forward and backward, so that the cutting tool helically turns along an inner peripheral shape of the pipe to cut an inner periphery of the pipe.
A repair method of repairing a welded part on an inner peripheral side of a pipe, comprising:
- a measuring step of acquiring measurement data of an inner peripheral shape of the pipe;
- and
- a cutting step of performing profile copy cutting with respect to an inner periphery of the pipe, while helically turning a cutting tool along the inner peripheral shape of the pipe, based on a relation between the measurement data and a predetermined cutting depth.
Dependencies are inferred from the claim text.