METHOD OF MAKING PREFORM FOR AERODYNAMIC PROFILE, AERODYNAMIC PROFILE AND NOZZLE SECTOR BY SELECTIVE MELTING ON POWDER BED Russian patent published in 2020 - IPC B22F3/105 B22F5/04 B33Y10/00 B33Y80/00 B22F3/24 

FIELD: machine building.

SUBSTANCE: group of inventions relates to production of aerodynamic profile preform for turbine engine by means of selective fusion. Preform comprises aerodynamic profile (2) and, at least, one removable support (6) secured thereto. Aerodynamic profile is made layer by layer from first edge (28) corresponding to front edge or trailing edge to second edge corresponding to trailing edge or leading edge. Eliminated support is attached to working platform (5) and to section of aerodynamic profile surface (2a) located in vicinity of first edge and facing said working platform. Surface (2a) of airfoil facing the working platform includes flat segment (30). Flat segment is located along section of said surface located beyond first edge (28). Support is attached to flat segment or simultaneously to flat segment (30) and to section of said surface (2a) located beyond first edge (28).

EFFECT: production of preform by means of selective melting without reduction of aerodynamic characteristics after removal of eliminated support.

10 cl, 5 dwg