A method and a machine for working a blade sector.

摘要

A blade sector has a plurality of blades (5) and a circular body (6,7) connecting the ends of the blades (5) defining its own axis (8) and is finished by the working of a lateral surface (9,10) of the circular body (6,7) itself; the working of the lateral outer surface (9,10) is effected with the use of a disc tool (50,49) having a shaped cutting surface by arranging the cutting surface of the disc tool (50,49) in contact with the lateral surface (9,10) and rotating the sector (2) about an axis (25) distinct from the axis (8) of the circular body (6,7) and, at the same time as the bladed sector (2) is rotated, displacing the blade sector (2) and the disc tool (50,49) translationally relative to each other in two directions (19)(32) perpendicular to the first axis (25) in such a way that a distance (R2) between the axis (8) of the circular body (6,7) and the instantaneous point of contact of the lateral surface (9,10) with the disc tool (50,49) is kept constant during the entire working of the lateral surface (9,10) itself. <IMAGE>