Patent ID: 9097116
Filing Date: 2015-08-04
Classification: B21D,B23P,F01D,F05D,Y10T

Abstract:
1. A method for reconditioning a cover plate of a vane of a turbomachine, by a forming apparatus, the vane comprising a mounting portion with fastening elements being connected, from a vane root of the vane, radially outward with respect to a rotor axis of the turbomachine, and an airfoil being connected in an opposite direction, a vane head being connected to the airfoil and a cover plate being connected to the vane head, the cover plate being bulged in the direction opposite to the vane root, the method comprising: determining, in an analysis step, dimensions of the vane in relation to the cover plate with respect to predefined reference points of the vane by dimension analysis; comparing the measurement values from the analysis step with reference values; forming, the bulged cover plate at least essentially pressed smooth, by pressing by the forming apparatus in a forming step; and re-treating after the forming step, the cover plate in one or more follow up steps; wherein after the forming step a grinding step is carried out, which involves at least the smooth grinding of an outer surface of the cover plate with respect to the vane, with a minimal stripping of basic material from the cover plate, the analysis step being carried out once again after the forming step and before the grinding step, in order to determine the effect of the forming step and of the grinding step; wherein the grinding step comprises a grinding of a concavity into the cover plate, the concavity being adapted correspondingly, in the mounted state, to an element, which is arranged opposite the cover plate mounted in the operationally ready turbomachine and which moves in relation to the cover plate, in such a way that the concavity can partially receive said element.