公开(公告)号：US10746046B2

公开(公告)日：2020-08-18

申请号：US15672638

申请日：2017-08-09

Applicant: Safran Nacelles

Inventor： Benjamin Provost ,  Bertrand Desjoyeaux ,  Sébastien Louchard ,  Arnaud Marical

IPC: F01D25/00 ,  D03D3/06 ,  D03D25/00 ,  D03D49/00 ,  F01D25/24 ,  F02K1/64

Abstract: The present disclosure provides a method for manufacturing a preform made of reinforcement fibers woven in a longitudinal direction. The preform is impregnated with resin in order to form an elongated element having a variable transverse cross-section. In one form, the method includes the step of simultaneously including a reduction (or increase) in width and an increase (or reduction) in height. The variable cross-section includes, along the length thereof, a consistent number (c) of continuous warp threads arranged in layers. The method for reducing width includes carrying out a change in weave, adding additional weft threads, and simultaneously drawing the teeth of the longitudinal beater reed closer together so as to increase the number of layers.

公开(公告)号：US10654194B2

公开(公告)日：2020-05-19

申请号：US16240092

申请日：2019-01-04

Applicant: SAFRAN NACELLES

Inventor： Benjamin Provost ,  Bertrand Desjoyeaux ,  Sébastien Louchard ,  Fabien Depeux

IPC: B29B11/16 ,  B29C70/30 ,  B64F5/10 ,  B32B1/08 ,  B32B5/12 ,  B64D29/00 ,  B64C7/02 ,  B29K105/08 ,  B29L31/30 ,  F02C7/04

Abstract: A method for manufacturing a preform has a non-developable end shape having, about a longitudinal axis (A), an end overall radius of curvature (R2), and, in at least a longitudinal section, curved segments forming bending radii linking straight segments. The method includes a step of depositing successive layers giving the preform an initial substantially rotational shape having, about the longitudinal axis (A), an initial overall radius of curvature, then a step of deploying the preform by increasing the initial overall radius of curvature until the end overall radius of curvature is reached (R2), in order to close the bending radii of the curved segments.