B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 5/18 (2006.01) B23K 9/04 (2006.01) B23P 6/04 (2006.01) F01D 5/02 (2006.01)
Patent
CA 2106425
ABSTRACT OF THE DISCLOSURE A method of restoring the bore of a rotor in a turbo-machine rotor having a centrally disposed bore by the steps of (i) depositing a weld material onto the bore surface over at least a portion of the axial length so as to reduce the inside diameter of the bore and roughened the bore surface over the portion of the axial length and (ii) machining the weld material so as to smoothen the bore surface. According to the method, the step of depositing the weld material is performed so as to deposit a weld bead circumferentially around the inner surface in a multi-pass process by inserting a welding nozzle into the bore and simultaneously impart both rotational and linear relative motion between the rotor and the welding nozzle. The bore inner surface is pre-machined to increase the inside diameter prior to the step of depositing the weld material and post-machined to the original bore diameter following the welding.
Amos Dennis Ray
Clark Robert Edward
Driver Timothy Lee
Bereskin & Parr
Westinghouse Electric Corporation
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