摘要:
Dans un procédé de fabrication d'une aube creuse de turbomachine assemblée par soudage-diffusion et formée superplastiquement par pression de gaz, après assemblage des pièces primaires (11-13) et mise en place dans un four, un traitement de pré-cuisson et élimination du liant du produit d'anti-diffusion, en enchaînement et sans déplacer les pièces, on effectue une mise sous vide de l'intérieur de l'ensemble d'aube (14) et simultanément une montée progressive à une vitesse V et jusqu'à une température T déterminées de manière à obtenir une déformation plastique permanente des pièces et à cette température T, l'intérieur dudit ensemble d'aube (14) est maintenu sous vide tandis qu'une pression isostatique est appliquée à l'extérieur dudit ensemble d'aube, ces conditions de température et pressions étant maintenues de manière à assurer un compactage du produit d'anti-diffusion et un pré-soudage des zones non revêtues de barrière de diffusion.
摘要:
Improved method of fabricating boron fiber and aluminum matrix composite structures, especially gas turbine compressor blades having titanium metal skins. Titanium skins (32, 32') and boron aluminum composite cores (34) are preformed by gas pressure and hard dies prior to hot pressing. The composite sheets (34) of the core are preformed with the use of expendable carrier sheets (36, 38) which hold the stacked sheets firmly as both the carrier sheets and composites are shaped through moderate temperature and gas pressure against a hard die (46). The preforming permanently shapes and lightly bonds the composite sheets. The skins (32, 32') are preformed in an analogous process using gas pressurization of a metal envelope into die cavities (24, 24'). The skins and composite core are then hot pressed in hard dies (54, 54') to form the finished part.
摘要:
An airfoil (164) includes an airfoil section (165) extending between a leading edge (LE) and a trailing edge (TE) in a chordwise direction (X) and extending between a tip portion (170) and a root section (168) in a spanwise direction (R). The airfoil section (165) defines pressure and suction sides (PS, SS) separated in a thickness direction (T), and includes a sheath (176) having first and second sheath portions (178, 180) extending along an airfoil body (172) of the airfoil section (165). The first sheath portion (178) includes a first interface portion (178B), and the second sheath portion (180) includes a second interface portion (180B) that cooperates with the first interface portion (178B) to establish a joint (182) having a circuitous profile along an edge (172C) of the airfoil body (172).
摘要:
A method of forming a gas turbine engine component (260) according to an example of the present disclosure includes, among other things, attaching a cover skin (270) to an airfoil body (268), the airfoil body (268) and the cover skin (270) cooperating to establish pressure and suction sides (PS, SS) of an airfoil (261), positioning the airfoil (261) between first and second dies (287-1, 287-2) of a deforming station (284-2), heating the airfoil body (268) to a first predefined temperature threshold between the first and second dies (287-1, 287-2), and moving the first die (287-1) relative to the second die (287-2) to hold the airfoil (261) between the first and second dies (287-1, 287-2) subsequent to the heating step, and then deforming the airfoil (261) between the first and second dies (287-1, 287-2).
摘要:
A method of forming a gas turbine engine component (160) includes attaching a first skin (170) to a main body (168) to enclose at least one internal channel (172), the first skin (170) and the main body (168) cooperating to define pressure and suction sides (PS, SS) of an airfoil (160), holding the first skin (170) and the main body (168) between first and second dies (178), and pressurizing the at least one internal channel (172) such that walls (171) of the first skin (170) and the main body (168) move outwardly toward surface contours (180) of the first and second dies (178).
摘要:
The invention proposes a method for producing a protective reinforcement for the leading edge (BA) or trailing edge of a blade (P), the leading edge (BA) or trailing edge being curved, the method comprising steps of flattening (102) a hollow tube (1) so as to form at least one fold line (6) extending along the tube (1), opening (104) the flattened tube (1) by cutting the tube (1) along a cutting line (8) opposite the fold line (6) with respect to the tube (1), so as to form two flanks (16, 18) linked at the fold line (6) and intended to be mounted on the pressure side and the suction side of the blade (P), the method being characterised by a preliminary step (100) of bending the hollow tube (1) carried out before the flattening (102) and adapted such that the fold line (6) after flattening (102) is curved and substantially matches the curved leading edge (BA) of the blade (P).