摘要:
The invention relates to an aircraft propeller blade including a structure having an airfoil, consisting of at least one fibrous reinforcement (200) obtained by three-dimensional weaving of threads and made denser by a matrix and a spar (60) including a bulged portion (62) extending outside of the fibrous reinforcement and forming the shank of the blade, and a shaped portion (61) in a recess (206) provided within the fibrous reinforcement (200). The fibrous reinforcement (200) comprises a disconnection area (204) forming the recess (206) inside the fibrous reinforcement (200). The disconnection area (204) leads to the lower portion (220) and the rear edge (230) of the fibrous reinforcement (200) such as to form an opening (231) for inserting the shaped portion (61) of the spar (60) into the recess (206) of the fibrous reinforcement. The opening (231) on the rear edge (230) of the fibrous reinforcement (200) extends over a height (H231) that is shorter than the height (H204) of the recess such as to provide, on said rear edge (230), a retaining portion (232) that is at least partially in contact with the shaped portion (61) of the spar (60).
摘要:
The invention relates to a compacting assembly comprising a forming mould (24) defining an upwardly open housing that can receive a previously cut woven preform (10a), and a vertically mobile compacting tool (128), and forming, with the forming mould (24), an assembly for compacting said preform previously placed in the housing. The compacting tool (128) comprises at least one foot portion (128A). The compacting tool comprises at least three separate compacting blocks (128 1 -128 7 ). The invention is applicable to the production of composite fan blades for turbomachines.
摘要:
Fibrous preform for a turbo machine blade, which preform is obtained by one-piece three-dimensional weaving. According to the invention, the preform comprises a first longitudinal portion (41) able to form a blade root, a second longitudinal portion (42) extending the first longitudinal portion and able to form a blade section, and a first transverse portion (51) extending transversely from the junction between the first and second longitudinal portions (41, 42) and able to form a first platform.
摘要:
The invention relates to an appliance (8) for compacting, drying and cutting a preform of a hollow component of a turbomachine, said appliance comprising: a base (2, 2a) acting as a support for a sheet of material (1, 7) and comprising a long impression (22, 22a); a mandrel (3, 3a) which can be positioned in said long impression, clamping the sheet of material against the base, thus defining two flaps (12, 13, 72, 73) of said sheet (1, 7) arranged either side of the mandrel (3, 3a); and two side blocks (5, 6, 5a, 6a) which can be positioned such that they are supported on the base, either side of the mandrel, clamping the flaps of the sheet against the mandrel, said side blocks and/or the mandrel co-operating with means for cutting said flaps in such a way that they are adjusted to the dimensions of the mandrel or said side blocks.
摘要:
A fibrous structure (200) comprises a preform portion (210) formed as a single piece by three-dimensional weaving between a first plurality of layers of threads and a second plurality of layers of threads, the preform portion corresponding to all or part of a fibrous reinforcement preform for a component made of composite. The fibrous structure (200) comprises, outside of the preform portion (210), one or more layers of two-dimensional woven fabric (220a, 220b), each layer of two-dimensional woven fabric grouping together the threads (2010a) of one same layer (201a) belonging at least to the first plurality of layers of threads and situated outside of the preform portion (210).
摘要:
Compacting assembly comprising a shaping mould (24) delimiting a housing open at the top able to receive a precut woven preform (10a), and a compacting tool (128) that is able to move vertically and forms, with the shaping mould (24), a compacting assembly for compacting said preform placed beforehand in the housing. The compacting tool (128) comprises at least one root portion (128A). Application to the manufacture of turbomachine composite blades.
摘要:
The invention relates to a fibrous blank (100) woven in one piece by three-dimensional weaving for producing a platform with a closed box structure for a turbomachine fan made of composite material. In each plane of the fibrous blank, a set of warp threads connects together the layers of weft threads of the first (102), the second (104) and the third (106) part of the fibrous blank while forming a closed disconnect (108) separating the first part from the second part over a portion of the dimension of the fibrous blank in the warp direction between an upstream disconnect limit (108a) and a downstream disconnect limit (108b), and at least one open disconnect (110) separating the second part from the third part over a portion of the dimension of the fibrous blank in the warp direction from a disconnect limit (110a) to a downstream edge (100c) of the fibrous blank. The invention also relates to a method for manufacturing a preform of a platform having a closed box structure for a turbomachine fan made of composite material on the basis of such a fibrous blank.