Method of modifying turbine rotor discs

B - Operations – Transporting – 23 – P

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B23P 15/02 (2006.01) B23K 9/04 (2006.01) B23P 6/00 (2006.01) B23P 15/00 (2006.01) F01D 5/00 (2006.01)

Patent

CA 2004851

ABSTRACT OF THE DISCLOSURE A method for modifying an original blade supporting disc (8) which is integral with a turbine rotor (2), and which has an original outline, in order to create a modified disc (8) which has an outline different from the original outline and which provides a blade-supporting region (10) of increased size, including the steps of: machining away portions (14,16) of the original disc (8) which protrude beyond the outline of the modified disc (8); building up the original disc (8) with weld metal past the outline of the modified disc (8) at all locations (14,20) where the outline of the original disc (8), after the machining step, is enclosed by the outline of the modified disc (8); and machining away parts of the weld metal to the outline Or the modified disc (8).

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