Geometry of a layup surface
AssigneeSafran Aero Boosters SA
InventorsJulien Philippe GALLET, Michel WLASOW WLASOWSKI
Life of this patent
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Abstract
A method for determining a lay-up geometry for creating a component made of composite material, includes a body which is a volume of revolution of axis directed in an axial direction, the body extending around the axial direction in a circumferential direction, and a flange extending from one end of the body in a direction of extension, the method involving determining a first surface having the shape of the body that is to be produced and determining a second surface, situated in the prolongation of the first surface, the second surface having closed curves of undulation in the circumferential direction, wherein the second surface also has corrective curvatures in the direction of prolongation.
Claims8
A method for determining a geometry of a lay-up mould for producing a blank of a component made of composite material, comprising a body of revolution with axis directed in an axial direction, said body extending around the axial direction in a circumferential direction, and at least one flange extending from one end of the body in a direction of extension, the method comprising:
- determining a first surface of revolution of axis directed in the axial direction having the shape of the body to be produced, said first surface extending around the axial direction in the circumferential direction,
- determining a second surface situated in the prolongation of the first surface in a prolongation direction, an angle formed between the axial direction and the prolongation direction being greater than an angle formed between the axial direction and the direction of extension, the second surface having closed curves of undulation in the circumferential direction continuing successively in the prolongation direction, each closed curve of circumferential undulation corresponding to a circle belonging to the flange to be produced, a curvilinear length of said closed curve corresponding to a value of the perimeter of said circle,
- wherein the second surface also has corrective curvatures in the prolongation direction, such that all the points of each closed curve of circumferential undulation are at a same curvilinear distance from the junction between the first surface and the second surface, said curvilinear distance belonging to the second surface and having a value corresponding to the curvilinear distance between the circle belonging to the flange (2) to be produced corresponding to said closed curve, and the junction between the flange and the body to be produced.
A mould for the lay-up of fibrous structures comprising a first lay-up surface and a second lay-up surface extending in the prolongation of the first lay-up surface in a prolongation direction, the first lay-up surface being a surface of revolution of axis directed in an axial direction, said first lay-up surface extending around the axial direction in a circumferential direction,
- the mould being characterised in that the second lay-up surface has undulations in the circumferential direction and corrective curvatures in the prolongation direction, the corrective curvatures situated on the maxima of the circumferential undulations are more curved than the corrective curvatures situated on the points of inflection of the circumferential undulations, such that all the points of each closed curve of circumferential undulation extending in the circumferential direction are at a same curvilinear distance from the junction between the first lay-up surface and the second lay-up surface, said curvilinear distance belonging to the second lay-up surface.
Dependencies are inferred from the claim text.