Method of fabricating a turbine engine blade out of composite material

摘要

A method of fabricating a turbine engine blade out of composite material includes three-dimensionally weaving yarns to make a preform including root and airfoil portions that are connected together by oblique side faces for forming bearing surfaces enabling the root to bear against an assembly slot in a rotor disk. The method also includes compacting the preform in a mold having a cavity with first oblique side faces corresponding to the above-mentioned side faces of the preform, and second oblique side faces bearing against the root portion of the preform and at angles of inclination opposite to those of the first oblique side faces. Further, the method includes vacuum injecting a resin into the mold and polymerizing the resin.

主权项

1. A method of fabricating a turbine engine blade out of composite material, the method comprising:
making a preform by three-dimensional weaving of yarns, said preform comprising a blade root portion and a blade airfoil portion, which portions are connected together by oblique side faces that are to form bearing surfaces enabling the blade root to bear against an assembly slot in a rotor disk; compacting the preform in a mold having a cavity with a root zone and an airfoil zone connected together by first oblique side faces corresponding to the above-mentioned side faces of the preform; and vacuum injecting a resin into the mold in order to impregnate the entire compacted preform and form a rigid blade after polymerization of the resin; wherein the method further comprises forming second oblique faces in the mold that bear against the root portion of the preform and that present angles of inclination opposite to the angles of inclination of the first oblique side faces in such a manner that during compacting of the preform, movement of a wall of the mold in a transverse direction tending to reduce a thickness of the preform gives rise to compression of the root portion of the preform in a longitudinal direction tending to urge the yarns of the preform against the first oblique side faces of the cavity of the mold while avoiding buckling of these yarns.