Patent ID: 6542843
Filing Date: 2003-04-01
Classification: B23P,F01D,F05D

Abstract:
A method for producing matched fluidic surfaces on rotor units with integral blades, preferably in axial design comprising a hub and at least one blade ring, by removing by machine after integral joining of at least one blade and the hub and/or at least one part of a blade and at least one blade, whereby prior to removal, at least one of these parts overall or locally comprises overmeasure in the area of the joining zone, in particular in the context of producing new parts and of repairing so-called blisks (bladed disks) and blings (bladed rugs) for gas turbines, whereby at least one actual surface describing the local shape of the component is acquired by a measuring method, and a fluidic surface is produced which is matched to the actual surface and which from the point of view of fluid technology and strength also favorably shapes the joining zone, characterized by combining the following characteristics:A) measuring acquisition of the actual surface (I 1 to I 6) and production of the matched surface (O 1, O 3 to O 6), of which there is at least one, take place on one processing machine with the same clamping of the rotor unit (1, 2, 3), i.e. in a connected measuring, calculating and processing cycle; B) the desired surface (S 3 to S 7) circumscribing in radial direction the desired profiles in the desired position, of each area to be processed from the blade tip (12, 13) to the hub (4, 5, 6) is made available to the processing machine in the form of stored data; C) based on at least one actual surface (I 1 to I 6) acquired by a measuring method, said actual surface which usually comprises geometric tolerances, extending close to the joining zone (14 to 17) a surface (O 1, O 3 to O 6) extending beyond the joining zone (14 to 17) is calculated according to the following criteria and produced by material removal: a) at each point the fluidic surface (O 1, O 3 to O 6) tangentially adjoins (as far as possible mathematically continuously), i.e. without kinks or steps, in straight and/or curved line with a locally variably specifiable minimum curvature, at least one actual surface (I 1 to I 6) and/or one at first theoretical, repair surface (R), with the latter being defined and produced at a locally variably specifiable minimum distance to a measured actual surface (I 4) within the component; b) the fluidic surface (O 1, O 3 to O 6) as far as possible corresponds to a mathematically continuous, spatial, at least largely curved surface, at each position comprising a locally and/or direction-dependent variably-specifiable minimum curvature; c) in every area where the fluidic surface (O 1, O 3 to O 6) to be produced, due to a) and/or b) and/or local component dimensions cannot correspond, or can only partly correspond, to the desired surface (S 3 to S 7) which in radial direction circumscribes the desired profiles in the desired position, the surface (O 1, O 3 to O 6) in each radial height is approximated as well as is possible to the local desired profile stored by data technology, taking into account mathematical continuity.