ADAPTIVE MACHINING METHOD FOR SMELTED BLADES

摘要

The invention relates to a method for finishing the shape of a turbine engine blade by machining, in which one area (8) is produced by smelting with a thickened portion, said thickened portion forming a first surface (10) with the surrounding profile and the theoretical profile being defined by a second surface (11), characterised in that it includes the following steps: defining, on the second surface (11), a grid (13) forming nodes and squares; defining each point (P) over which the machining tool (20) is to pass according to weighting coefficients (Cpi) equal to the weight to be given to the nodes (Ni) of the square in which the tool is located, in order to be the barycentre of said assigned nodes of said coefficients; measuring, for each node Ni located outside the outer limit (12), the delta (Ni) between the first surface (10) at said node and the theoretical position of the node; calculating the deltas (Nj) for each node Nj located within the outer limit (12) by means of interpolation from the already known deltas; using said weighting coefficients (Cpi), defining the delta (P) to be applied at each point P according to the weighted sum of the deltas (Ni) of the nodes of the square to which said point P belongs.