Patent ID: 8597073
Filing Date: 2013-12-03
Classification: B23P,B24B,F01D,F05D,G05B,Y02T,Y10T

Abstract:
1. Method for machining the leading edge of a turbine engine blade by means of a machining centre for which parameters can be set, the method comprising the following steps: acquiring a 3D profile of the leading edge and the trailing edge of the blade, at least two elementary sections being defined on the profile of the blade over its height; calculating at least one characteristic of the leading edge from the 3D profile for each of the elementary sections, the said characteristic being chosen from the chord width of the blade, the radius of the leading edge, the pressure-side slope and the suction-side slope of the leading edge; for each given elementary section, comparing the value of the calculated characteristic with a known theoretical value of the said characteristic for the said given elementary section so as to obtain an elementary difference for the said characteristic for the said given elementary section; calculating at least one undulation of the leading edge between at least two consecutive elementary sections from the 3D profile; optimizing the elementary differences obtained as a function of the said undulation; setting the parameters of the machining centre as a function of the optimized elementary differences for the said elementary sections in order to define machining passes of the machining centre over the leading edge; and machining the leading edge of the blade with the machining centre with parameters set.