Metal working – Method of mechanical manufacture – Impeller making
Patent
1992-08-12
1994-02-15
Briggs, William
Metal working
Method of mechanical manufacture
Impeller making
295647, 36447429, 409 80, 409 84, B23P 604, B23C 318
Patent
active
052855724
ABSTRACT:
A method and system for machining a contoured surface of a part, such as a vane of a vane segment of a nozzle ring in a gas turbine engine. A plurality of original data points from the original surface of the vane are sensed. The system comprises an algorithm for creating a matrix of data and for generating a revised contour profile corresponding to the cross-sectioned contour of the vane for points which lie in a common plane. The original contour may have missing sections in its profile or may have areas where brazing material has been applied to the vane. The revised contour profile is adjusted in accordance with certain predefined parameters. The revised contour profile is also adjusted so that all of its points lie on or inside the perimeter shape defined by the original data points. All of the revised contour profiles associated with each cross-section of the vane is compiled to generate one machining contour. The system includes a machining station which machines the vane in accordance with the machining contour.
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patent: 4893388 (1990-01-01), Amos et al.
M. Kass, A. Witkin and D. Terzopoulos, "Snakes: Active Contour Models," Proc. First Int. Conf. Compt. Vision & Pat. Recog., London, Eng., Jun. 1987.
A. Benson & D. J. Evans, "A Normalized Algorithm for the Solution of Positive Definite Symmetric Quindiagonal Systems of Linear Equations," ACM Trans. on Math, Software, vol. 3, 1977.
Fairbourn David C.
Nurre Joseph H.
Rathi Rajendra P.
Briggs William
General Electric Company
Moore, Jr. Charles L.
Squillaro Jerome C.
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