Geometry of superimposed surfaces

Abstract

The invention relates to a method for determining a superimposed geometry for producing an article of composite material (4) comprising a body (1), which is a volume of revolution having an axis (A) oriented in an axial direction (DA) and having a given reference radius (RR1, RR2, RR3), and a flange (2), the body (1) extending in a circumferential direction (DC) about the axial direction (DA), a flange (2) extends from one end of a body (1) in an extension direction (DE), the method comprising: determining a first surface (100) having a radius (RC1, RC2, RC3) smaller than a reference radius (RR1, RR2, RR3); and determining a second surface (200) positioned to continue to the first surface (100), the second surface having a circumferential undulation curve (21, 22, 23, 24, 25) along a circumferential direction (DC) and a continuation direction (DP).

Description

Technical Field

[0001] The present invention relates to the manufacture of composite material parts by cladding on a surface. In particular, but not exclusively, the present invention relates to the manufacture of aircraft engine casings. Background Art

[0002] The use of composite materials in the manufacture of aerospace parts, such as aircraft engine casings, makes it possible to obtain durable parts with mechanical properties comparable to or even superior to those made of metal, while having a much lower mass.

[0003] It is known to produce composite parts by covering the surface of a pre-impregnated fiber structure. For reasons of production costs and repeatability, covering can be performed automatically according to the automated fiber placement (AFP) technique. For example, an example of a method for manufacturing a composite part using the "AFP" method is described in document FR3062336B1.

[0004] However, when it is necessary to produce a component comprising a partially revolving body, the flanges extend at its end (or ends), the angle between the body and at least one flange is limited, in particular an acute angle of 90° or less, and the head or roller used to deposit the fiber structure is not allowed to approach the bottom of said angle.

[0005] Therefore, in order to produce parts with such angles, the covering is performed at a greater angle to allow the deposition head or roller to pass, and the structure produced by the covering is then deformed to obtain the desired angle. Such solutions are described, for example, in documents WO 2018 / 007756 and WO 2012 / 046020.

[0006] In document WO 2018 / 007756, in order to produce a final part comprising a flange and a half-shell body with a given final radius, a half-shell intermediate preform is first covered with a radius smaller than the final radius to be obtained, whereby the angle between the body and the flange is greater, which makes it possible to carry out covering of said angle. When covering is completed, the intermediate preform thus obtained is deformed with the desired final radius, thereby deforming the flange in order to obtain the desired angle between the flange and the body.

[0007] In document WO2012 / 046020, a component is produced comprising a cylindrical body and a circular flange extending perpendicularly to the cylindrical body. Covering is performed by covering the portion intended to form the flange by extending over the portion intended to form the cylindrical body. The portion intended to form the flange is then deformed so as to be placed perpendicularly to the axis of revolution of the body. During covering, the portion intended to form the flange has a circumferential undulation of increasing amplitude as it approaches the free end of said portion, so as to obtain a smooth flange after deformation.

[0008] However, in the described solution, mechanical deformation of the covered structure leads to deformation of the covered fiber structure and significant stresses in the fibers, especially near the vertices of the angles. These deformations are more prominent when there is a fillet between the flange and the body, or when the angle between the flange and the body is less than 90°. Summary of the invention

[0009] The present invention aims to overcome the above-mentioned drawbacks. To this end, the present invention proposes a method for determining the geometry of a cover mold for producing a blank for a composite material component, the component comprising a body of partial revolution, the body having an axis directed in an axial direction and having one or more reference radii given along the axial direction, the body extending partially around the axial direction in a circumferential direction, and the component comprising at least one flange extending from one end of the body in an extension direction, the method comprising:

[0010] - defining a first surface of revolution having an axis directed in the axial direction, said first surface extending in said circumferential direction around said axial direction,

[0011] - determining a second surface located in the extension of the first surface in the extension direction, the angle formed between the axial direction and the extension direction being greater than the angle formed between the axial direction and the extension direction, the second surface having, in the extension direction, undulations that follow one another continuously in the circumferential direction, each circumferential undulation corresponding to an arc belonging to the flange to be produced, the curve length of said undulations corresponding to the length of said arc,

[0012] The method is characterized in that a first surface of revolution presents one or more radii in the axial direction that are smaller than a reference radius at the same position in the axial direction, said first surface corresponding to the curvature in the circumferential direction of a surface having the shape of the body to be produced,

[0013] And the second surface has a corrected curvature in the extension direction so that all points of each circumferential undulating curve have the same curve distance from the junction of the first surface and the second surface, and the curve distance belongs to the second surface and has a value corresponding to the curve distance between the arc corresponding to the circumferential undulating curve belonging to the flange to be produced and the junction between the flange to be produced and the main body.

[0014] The first surface is intended to be the covering surface to be covered of a blank of the body of the part to be produced. The second surface is intended to be the covering surface to be covered of a blank of the flange of the part to be produced.

[0015] The angle formed between the axial direction and another direction should be understood as the angle from the main body or from the surface corresponding to the main body toward the flange or the surface corresponding to the flange, and the angle is measured from the axial direction part located on the main body side or the axial direction part corresponding to the surface side of the main body toward the part of the other nearest direction.

[0016] The curvilinear distance or length between a point on the circumferential undulation curve and the junction between the first surface and the second surface is defined as the minimum curvilinear distance belonging to the second surface and enabling the point on the circumferential undulation curve to be connected to the junction.

[0017] The curvilinear distance or length between the arc and the junction between the flange and the body is defined as the minimum curvilinear distance belonging to the flange that enables a point on the arc to join to the junction.

[0018] Thus, by making the corrective curvature in the direction of extension, the stresses in the fibers are limited after the covered blank is formed to obtain a preform for a component. In fact, the circumferential undulations can generate length defects in the direction of extension, which can be corrected using the corrective curvature. Furthermore, by determining the different curve lengths between the arc belonging to the flange and the junction between the flange and the body, the possible fillet radius between the flange and the body can be taken into account in the design of the mold. Thus, when the covered blank is formed to obtain a preform for a component, the fiber tension at the location of the fillet is limited.

[0019] In addition, by manufacturing a first covering surface for the main body blank having a radius smaller than the radius of the main body to be manufactured, the angle between the first surface and the second surface intended for the flange blank is further increased, which further facilitates the passage of the covering head and the application of the fiber structure at the junction between the first surface and the second surface.

[0020] According to a particular feature of the present invention, the inflection point of each circumferential undulation curve is contained in the same circle.

[0021] According to another specific feature of the present invention, the minimum point of each circumferential undulation curve is contained in the same circle, the radius of which is greater than or equal to the radius of the arc forming the junction between the first surface and the second surface.

[0022] According to another specific feature of the present invention, the minimum point of each circumferential undulation curve is contained in the same circle, the radius of which is the same as the arc forming the junction between the first surface and the second surface.

[0023] This ensures that the lowest possible stresses are achieved in the fibers during the deformation of the fiber blank.

[0024] According to another specific feature of the invention, the correction curvature located at the maximum point of the circumferential undulation has a larger radius of curvature than the correction curvature located at the inflection point of the circumferential undulation.

[0025] In fact, the circumferential undulation deforms the second surface and may therefore result in insufficient material at the maximum points of the circumferential undulation. Therefore, by using more bending correction curvature at the maximum points of the circumferential undulation, more material can be provided at these locations.

[0026] According to another specific feature of the present invention, the angle between the axial direction and the extension direction is less than or equal to 120°, and the angle between the axial direction and the extension direction is greater than 120°.

[0027] According to another particular feature of the invention, the flange to be produced comprises rounded corners at its junction with the body to be produced.

[0028] The invention also relates to a method for manufacturing a composite component, the component comprising: a body of partial revolution with an axis directed in an axial direction, the body having one or more reference radii given along the axial direction, the body extending partially around the axial direction in a circumferential direction; and at least one flange extending from one end of the body in an extension direction, the method comprising:

[0029] - forming a fiber blank of the component to be obtained by depositing a plurality of fiber layers by automatically placing fibers on a covering mold comprising a first covering surface and a second covering surface located in extension of the first covering surface, the first covering surface and the second covering surface respectively corresponding at least to the first surface and the second surface determined by the method for determining the geometry of the covering mold, the portion of the blank produced on the first covering surface corresponding to the blank of the body and the portion of the blank produced on the second covering surface corresponding to the blank of the flange,

[0030] - forming the fiber blank to obtain a fiber preform, the forming comprising unfolding the main body blank in the circumferential direction to obtain a main body preform having one or more reference radii in the axial direction and having the shape of the main body to be produced, and forming the flange blank to obtain a flange preform extending from the end of the main body preform in the extension direction and having the shape of the flange to be produced, and then

[0031] - Densification of the fiber preform by means of a matrix to obtain a composite component.

[0032] Thereby, the flange blank has a relief corresponding to the circumferential relief curve and the correct curvature of the second covering surface.

[0033] According to a particular feature of the invention, the unfolding of the body blank and the forming of the flange blank are performed simultaneously.

[0034] Thus, the shaping of the fiber blank to obtain the fiber preform to be densified is carried out in one step, in which the undulations on the flange blank are completely smoothed. Thus, this embodiment is simplified and faster. Intermediate shaping steps are thereby avoided.

[0035] According to another specific feature of the present invention, intermediate forming of the flange blank is first performed to obtain an intermediate flange preform extending from the end of the main body blank along an intermediate extension direction, the angle between the intermediate extension direction and the axial direction is smaller than the angle between the extension direction and the axial direction, but larger than the angle between the extension direction and the axial direction, and then the main body blank is unfolded to obtain the main body preform, thereby performing forming of the intermediate flange preform to obtain a flange preform extending from the main body preform along the extension direction and having the shape of the flange to be produced.

[0036] In this embodiment, the intermediate step of forming the flange blank, which can partially fold the flange blank by smoothing the undulations, and the step of unfolding the main body blank are performed separately. In this embodiment, the intermediate flange preform no longer includes undulations. Therefore, each of these operations can be better controlled. In addition, by performing these two steps separately, for example, compaction can be performed after the intermediate forming of the flange blank and before the unfolding of the main body blank.

[0037] The invention also relates to a method for manufacturing a composite component, the component comprising: a body of full revolution with an axis directed in an axial direction, the body having one or more given reference radii, the body extending partially around the axial direction in a circumferential direction; and at least one flange extending from one end of the body in an extension direction, the method comprising:

[0038] - producing a component segment, the component segment comprising: a partially revolved body segment, the body segment having an axis directed in the axial direction and having a given reference radius, the body segment extending partially around the axial direction in the circumferential direction; and at least one flange segment extending from one end of the body segment in the extension direction, the manufacturing of the component segment being performed according to the previously described manufacturing method,

[0039] - Assembling component segments to obtain a composite component with a complete revolution.

[0040] The inventive covering mould geometry therefore makes it possible to produce not only partially turned components but also completely turned components by assembling several partially turned component sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] [ Figure 1 ] Figure 1is a three-dimensional view of a component that can be produced by using a cover mold according to the invention, comprising a body and at least one flange.

[0042] [ Figure 2A ] Figure 2A yes Figure 1 A schematic cross-sectional view of a component at a first radius level of the component.

[0043] [ Figure 2B ] Figure 2B yes Figure 1 A schematic cross-sectional view of a component at a second radius level of the component.

[0044] [ Figure 2C ] Figure 2C yes Figure 1 A schematic cross-sectional view of a component at the level of a third radius of the component.

[0045] [ Figure 3 ] Figure 3 is a three-dimensional schematic diagram of a first surface of a mold according to the present invention.

[0046] [ Figure 4A ] Figure 4A yes Figure 3 A schematic cross-sectional view of a first surface at a level of a first radius of the first surface.

[0047] [ Figure 4B ] Figure 4B yes Figure 3 A schematic cross-sectional view of a first surface at a level of a second radius of the first surface.

[0048] [ Figure 4C ] Figure 4C yes Figure 3 A schematic cross-sectional view of a first surface at a level of a third radius of the first surface.

[0049] [ Figure 5 ] Figure 5 yes Figure 1 A schematic partial sectional view of a component used to determine the length of the arc belonging to the flange.

[0050] [ Figure 6 ] Figure 6 yes Figure 1 A schematic partial cross-sectional view of a component used to determine the length of the flange.

[0051] [ Figure 7 ] Figure 7 is a three-dimensional view of the first surface and the second surface obtained according to the present invention for producing a Figure 1 Covering mold for parts.

[0052] [ Figure 8 ] Figure 8 yes Figure 7 A view of the surface shown in , showing the circumferential undulations.

[0053] [ Fig. 9 ] Fig. 9 yes Figure 7 A first partial three-dimensional view of the surface shown in , showing the corrected curvature.

[0054] [ Fig.10 ] Fig.10 yes Figure 7 A second partial three-dimensional view of the surface shown in , showing the corrected curvature.

[0055] [ Fig.11 ] Fig.11 Yes Figures 7 to 10 Schematic diagram of the covering mold of the shown surface.

[0056] [ Fig.12 ] Fig.12 A partial schematic of a covered component formed by automated fiber placement.

[0057] [ Fig.13 ] Fig.13 is through Fig.11 A schematic partial view of the obtained fiber blank is covered on the mold shown in FIG.

[0058] [ Fig.14 ] Fig.14 By expanding Fig.13 A schematic partial view of the intermediate fiber preform obtained from the blank shown.

[0059] [ Fig.15 ] Fig.15 It is formed by Fig.13 The blank shown or Fig.14 A schematic partial view of a fiber preform obtained from the intermediate preform shown.

[0060] [ Fig.16 ] Fig.16 By assembling Figure 1 Schematic diagram of the complete rotation of the component obtained by the two components shown. DETAILED DESCRIPTION

[0061] Figure 1 A component 4 made of composite material is shown, comprising a body 1 and at least one flange 2. The term "flange" may refer to a collar. The component 4 may be an aircraft engine casing comprising two flanges.

[0062] The body 1 is a volume of partial revolution, with its axis of revolution A along the axial direction D AThe main body 1 is guided along the circumferential direction D C Partially extends around its axis of revolution A. Circumferential direction D C In the direction perpendicular to the axial A The body 1 may have a truncated cone or tubular shape, or any axisymmetric profile.

[0063] The main body 1 has a A One or more reference radii are given. In the direction perpendicular to the axial direction D A In each plane, the reference radius R R1 , R R2 , R R3 Defined as the axial direction D A The distance between the arc formed by the main body 1 corresponds to the axial direction D A The positions r1, r2, r3 on Figure 1 , Figure 2A , Figure 2B and Figure 2C In addition, each position r1, r2, r3 is also perpendicular to the axial direction D of the main body 1. A The lengths L1, L2, L3 of the arcs formed in the plane of and passing through the positions r1, r2, r3 are associated.

[0064] exist Figure 1 , Figure 2A , Figure 2B and Figure 2C In the example shown, the body 1 of the component 4 is oriented perpendicular to the axial direction D A The arc formed on each plane is divided by a reference angle θ of 180° R If the main body 1 is perpendicular to the axial direction D A The reference angle θ at which the arcs formed on each plane intersect R Less than 180°, or greater than 180° but strictly less than 360°, would of course not depart from the framework of the invention.

[0065] The flange 2 is present at one end of the body 1 and extends from said end of the body 1. The flange 2 is annular or truncated cone-shaped, with its local axis of revolution A extending in the axial direction D. A The flange 2 extends from the main body 1 along the direction D E extend.

[0066] Therefore, the entire composite component 4 is a volume of local revolution, with the axis A along the axial direction D A Guide. Extension direction D E is defined for each connection point between the body 1 and the flange 2. The extension direction D at two different points of the joint EHowever, the extension direction D defined for each point of the junction between the body 1 and the flange 2 is E The intersection must take place at a single point on the axis of revolution A belonging to component 4 .

[0067] exist Figure 1 In the example shown, the flange 2 forms an angle of 90° with the axis of revolution A of the body 1 , which corresponds to a direction perpendicular to the axial direction D. A The extension direction D E . Moreover, the flange 2 forms an acute angle of less than 90° with the surface of the body 1 on which it extends, which makes the production of the component 4 particularly difficult with the automated fiber placement method according to the prior art. Of course, there is no departure from the framework of the invention if the flange forms an angle of less than 90° with the axis of revolution of the body, which corresponds to less than 90° between the extension direction and the axial direction. There is no departure from the framework of the invention if the flange forms an angle of more than 90° with the axis of revolution of the body, but if this angle is small enough to cause collision problems during the automated covering of said angle.

[0068] According to the well-known automated fiber placement (AFP) method, it is desired to produce a fiber structure by covering the surface Figure 1 The composite part 4 is shown. However, the small angle formed between the flange 2 and the body 1 of the part 4 does not allow direct coating on a surface having the shape of the final part 4. In fact, this angle does not allow the automatic deposition head or roller to pass completely, thus resulting in an unsatisfactory deposition of the fiber structure at the bottom of this angle.

[0069] The invention therefore proposes to devise a specific covering geometry having a large or even flat angle between a first surface of the blank intended to cover the body 1 and a second surface of the blank intended to cover the flange 2 , in order to enable automatic covering of the fiber structure.

[0070] In order to allow forming of the covered fiber blank at the correct angle without generating significant tension in the covered fiber structure, more specifically near the apex of the angle between the flange 2 and the body 1 , it is necessary to design a specific geometry for the covering mold.

[0071] In order to simplify the drawings and the description, the first "geometric" surface determined by the method for determining the covering geometry according to the invention and the first "actual" covering surface of the mold are identical and coincident, so as to have the same reference number "100". Similarly, the second "geometric" surface determined by the method for determining the covering geometry according to the invention and the second "actual" covering surface of the mold are identical and coincident, so as to have the same reference number "200". Of course, if the first "actual" covering surface and the second "actual" covering surface correspond only to a part of the first determined "geometric" surface and the second determined "geometric" surface, it does not deviate from the framework of the invention.

[0072] The mold comprises a first covering surface 100 of a fiber blank for covering the body 1 and a second covering surface 200 of a fiber blank for covering the flange 2. The second surface 200 of the mold extends in a direction D P Extends in extension of the first surface 100 of the mould.

[0073] Preferably, at any point of the junction between the first surface and the second surface, a tangent line of the first surface coincides with a tangent line of the second surface.

[0074] It would of course not depart from the framework of the invention if, at any point of the junction between the first and second surfaces, the tangent to the first surface is slightly inclined relative to the tangent to the second surface, provided that the junction between the first and second surfaces is easily accessible to the head or roller for the automatic deposition of the fiber structure. Thus, at any point of the junction between the first and second surfaces, the angle between the tangent to the first surface and the tangent to the second surface is generally greater than or equal to 120°, preferably equal to 180°.

[0075] The first surface 100 is a partial or complete surface of revolution, the axis of revolution of which is along the axial direction D A The first surface 100 is in the axial direction D A The length of the main body 1 to be manufactured is at least equal to the length of the main body 1 to be manufactured in the axial direction D A The length of the upper.

[0076] like Figure 3 , Figure 4A , Figure 4B and Figure 4C As shown, the first surface 100 is perpendicular to the axial direction D A The arc formed in each plane is greater than the reference angle θ R The structural angle θ C Therefore, the first surface 100 is truncated in the circumferential direction D CIn the case where the first surface 100 is a surface of complete revolution, the first surface 100 of the mold is perpendicular to the axial direction D A If the arc formed on each plane of is a complete circle, then the construction angle θ is considered C Equal to 360°.

[0077] Preferably, corresponding to the reference angle θ R With the structural angle θ C The ratio of the ratio between is between 0.6 and 0.8. Figures 1 to 2C The reference angle θ is shown R is 180°, and the first surface having a complete revolution, i.e., the configuration angle θ C 360° would correspond to a transformation ratio of 0.5.

[0078] like Figure 3 , Figure 4A , Figure 4B and Figure 4C As shown, the first surface 100 is along the axial direction D A With one or more construction radii. A In each plane, the construction radius is defined as the axial direction D A The distance between the reference radius R and the arc formed by the first surface 100. R1 , R R2 , R R3 Corresponding axial direction D A At each position r1, r2, r3, the construction radius R of the first surface 100 C1 , R C2 , R C3 Therefore, each construction radius R of the first surface 100 C1 , R C2 , R C3 With reference radius R R1 , R R2 , R R3 For the axial direction D A At each position r1, r2, r3, the construction radius R of the first surface 100 C1 , R C2 , R C3 Must be smaller than the corresponding reference radius R R1 , R R2 , R R3 .

[0079] For the axial direction D AAt each position r1, r2, r3 of the mold, the length of the arc formed by the first surface 100 is equal to the length L1, L2, L3 of the arc of the body 1 associated with said position r1, r2, r3. In other words, in order to determine the first surface 100 of the mold, the body 1 is kept in the circumferential direction D C Therefore, for the axial direction D A For each position r1, r2, r3, construct the radius R C1 , R C2 , R C3 With reference radius R R1 , R R2 , R R3 The ratio corresponds to the above-mentioned transformation ratio.

[0080] Thus, the first surface 100 corresponds to a circumferential direction D along the surface of the body to be manufactured. C The curvature.

[0081] A geometric mold having the shape of the component to be manufactured, a first geometric mold portion having the shape of the body to be manufactured, and a second geometric mold portion having the shape of the flange to be manufactured can be generated. When the above transformation is applied to the first geometric mold portion of the component to be manufactured, the first portion corresponds to the shape of the flange along the circumferential direction D C The curvature is reduced to reduce the radius, thereby obtaining the first surface 100. This transformation of the first geometric mold portion of the part to be manufactured will produce a slope of the second geometric mold portion having the shape of the flange to be manufactured, which will no longer be along the extension direction D E Extends along the middle extension direction D Pi Extend to obtain a second intermediate geometric surface 200b, such as Figure 3 shown.

[0082] The angle formed between the first surface 100 and the second intermediate geometric surface 200b is greater than the angle formed between the surface of the body and the surface of the flange to be manufactured. As a reminder, the angle formed between the axial direction and another direction must be understood here as an angle directed from the first surface 100 toward the second intermediate geometric surface 200b, and the angle is measured from the axial direction portion located on one side of the first surface 100 toward the second intermediate geometric surface 200b.

[0083] The second surface 200 of the mould is designed in several steps. The second surface 200 is preferably determined by the second intermediate geometrical surface 200b. However, if the second surface 200 is determined directly according to the geometrical mould of the flange to be produced, it does not deviate from the framework of the invention.

[0084] The first step consists in determining, according to the chosen reference, the periphery of one or more arcs belonging to the flange or the second intermediate geometrical surface 200b, depending on the distance of said arcs relative to the axis of revolution and the position of their centers on the axis of revolution, their centers being points belonging to the axis of revolution. Figure 5 and Figure 6 In the example shown, the arc belongs to a plane perpendicular to the axial direction.

[0085] In the case where the second surface 200 is determined directly from the geometrical mould of the flange to be produced, it is necessary to consider the position of the centre of the arc belonging to the flange on the axis of revolution if the fillet forms the junction between the flange and the body or if the extension direction is not perpendicular to the axial direction. The fillet forming the junction between the flange and the body is considered to be part of the flange.

[0086] In the case where the second surface 200 is determined by the second intermediate geometric surface 200b, if the rounded corners are made between the first surface 100 and the second intermediate geometric surface 200b, or in the intermediate extension direction D Pi In the case of being not perpendicular to the axial direction, the position of the center of the arc belonging to the intermediate geometrical surface 200b on the axis of revolution needs to be considered. The fillet making the junction between the first surface 100 and the second intermediate geometrical surface 200b is considered to be part of the second intermediate geometrical surface 200b.

[0087] exist Figure 5 and Figure 6 In the example shown, the fillet between the first surface 100 and the second intermediate geometrical surface 200b must be taken into account because there is a fillet between the body 1 and the flange 2. Therefore, it is necessary to determine the length of the arc belonging to the second intermediate geometrical surface 200b and the length of the arc belonging to the second intermediate geometrical surface 200b along the intermediate extension direction D. Pi The length of the extended portion of the arc.

[0088] If the second surface 200 is determined directly according to the geometric mold of the flange to be produced, the length of the arc of the fillet of the flange 2 and the length of the arc of the flange 2 along the extension direction D will be determined. E The length of the extended portion of the arc.

[0089] like Figure 5 and Figure 6As shown, several points A0, A1, A2, A3, A4, A5 belonging to the second intermediate geometric surface 200b or to the flange 2 arranged at different distances from the axis of revolution A can be selected. The selected points A0, A1, A2, A3, A4, A5 preferably include the point A0 belonging to the junction between the first surface 100 and the second intermediate geometric surface 200b, or the point belonging to the junction between the mold of the body to be produced and the mold of the flange 2 to be produced, as the case may be, and the point A5 belonging to the end of the second intermediate geometric surface 200b or the end of the geometric mold of the flange 2, as the case may be. Due to the presence of rounded corners, it is necessary to discretize the rounded corners. Therefore, the selected points A0, A1, A2, A3, A4, A5 preferably include the point A1 belonging to the rounded corner and the point A2 present at the end of the rounded corner opposite to the junction. Of course, if more or fewer points are selected, or if their positions are different, it will not deviate from the framework of the present invention.

[0090] like Figure 5 As shown, each of the points A0, A1, A2, A3, A4, A5 is associated with a position a0, a1, a2, a3, a4, a5 on the axis of revolution A, respectively. Each of the points A0, A1, A2, A3, A4, A5 is also associated with an arc including the point, the center of the arc belonging to the axis of revolution A. Therefore, each of the points A0, A1, A2, A3, A4, A5 is associated with an arc having a center at a0, a1, a2, a3, a4, a5, respectively. Each arc associated with the points A0, A1, A2, A3, A4, A5 is connected along the circumferential direction D C They have lengths l0, l1, l2, l3, l4, and l5 respectively.

[0091] The second step consists in determining the length of one or more curves from the junction between the first surface 100 and the second intermediate geometrical surface 200 b, or from the junction between the geometrical mould of the flange and the geometrical mould of the body, as the case may be, to one or more arcs belonging to the second intermediate geometrical surface 200 b or to one or more arcs belonging to the flange.

[0092] In the case where the second surface 200 is determined directly according to the geometrical mold of the flange to be produced, if a sharp ridge forms the junction between the flange and the body, the curve length to be determined between the junction and the arc belonging to the flange is along the extension direction D E Therefore, in this configuration, the length starting from the joint is easy to determine. In the case where the joint between the flange and the valve body is formed by a rounded corner, the length of the curve to be determined between the joint and the arc belonging to the flange is not a straight line.

[0093] In the case where the second surface 200 is determined by the second intermediate geometrical surface 200b, if a sharp ridge forms a junction between the first surface 100 and the second intermediate geometrical surface 200b, the curve length to be determined between the junction and the arc belonging to the second intermediate geometrical surface 200b is along the intermediate extension direction D Pi Therefore, in this configuration, the length starting from the joint is easily determined. In the case where the rounded corner forms the joint between the first surface 100 and the second intermediate geometric surface 200b, the length of the curve to be determined between the joint and the arc belonging to the second intermediate geometric surface 200b is not a straight line.

[0094] exist Figure 5 and Figure 6 In the example shown, the fillet between the first surface 100 and the second intermediate geometric surface 200b must be considered because there is a fillet between the body 1 and the flange 2. Therefore, it is necessary to determine the length of the curve between the joint and the arc belonging to the second intermediate geometric surface 200b or the arc of the geometric mold of the flange 2 according to the specific situation.

[0095] Reconsider the points A0, A1, A2, A3, A4, A5 whose relative arc lengths l0, l1, l2, l3, l4, l5 are known. By drawing the extension direction D P The length of the curve between points A0, A1, A2, A3, A4, and A5 on Figure 6 As shown, a set of corresponding points B0, B1, B2, B3, B4, B5 separated by curve lengths e1, e2, e3, e4, e5 is obtained. Therefore, the curve length from the junction to the arc corresponding to point A4 will be the sum of the lengths e1, e2 and e3. Therefore, the total curve length e1 of the second intermediate geometric surface 200b or flange 2 from the junction to its end is 总计 will be the length between B0 and B5, that is, the sum of the lengths e1, e2, e3, e4, and e5, as Figure 6 shown.

[0096] Thus, each length l0, l1, l2, l3, l4, l5 of the arc is associated with a curve length defined from the joint, which has the values ​​0, e1, e1+e2, e1+e2+e3, e1+e2+e3+e4, e1+e2+e3+e4, e1+e2+e3+e5, e1+e2+e3+e6, e1+e2+e3+e7, e1+e2+e3+e8, e1+e2+e3+e9, e1+e2+e4+e11, e1+e2+e3+e11, e1+e2+e3+e4, e1+e2+e3+e8, e1+e2+e3+e9, e1+e2+e3+e11, e1+e2+e3+e4, e1+e2+e3+e4, e1+e2+e3+e5, 总计 .

[0097] In general, the first step and the second step can be performed simultaneously, or one after the other in any order. At the end of the first two steps, each curve length starting from the junction is associated with the length of the arc.

[0098] The third step consists in determining the geometry of the second surface 200 of the mold, which is located along the extension direction D P Extends in extension of the first surface 100 of the mould.

[0099] like Figure 7 and Figure 8 As shown, the second surface 200 is designed to be C Therefore, the second surface 200 has a undulating portion along the axial direction D A A plurality of circumferential relief curves 21 , 22 , 23 , 24 , 25 that are continuous with one another. The circumferential relief curve comprises all points that are located at the same curvilinear distance from the junction between the first surface 100 and the second surface 200 , said curvilinear distance belonging to the second surface 200 .

[0100] The undulations of the same curves 21, 22, 23, 24, 25 in the circumferential direction D C The undulations of curves 21, 22, 23, 24, and 25 are determined by the circumferential direction D. C The undulations of the curves 21, 22, 23, 24, 25 are preferably periodic and may be sinusoidal or generally sinusoidal, such as Figure 8 shown.

[0101] The undulation of the same curve 21, 22, 23, 24, 25 has a plurality of maximum points and a plurality of minimum points, the plurality of maximum points are distributed on a circle whose center belongs to the rotation axis A of the first surface 100, and the plurality of minimum points are distributed on a circle whose center belongs to the rotation axis A of the first surface 100. Therefore, the undulation of the same curve 21, 22, 23, 24, 25 in the circumferential direction D C The minimum point is defined as the point closest to the rotation axis A in the curves 21, 22, 23, 24, 25, and the maximum point is defined as the point farthest from the rotation axis A.

[0102] The inflection points of the same undulating curve 21, 22, 23, 24, 25 are distributed on a circle, the center of which belongs to the axis of revolution of the first surface.

[0103] The amplitude and number of undulations of the curves 21, 22, 23, 24, 25 are chosen to allow the automated fiber depositing head to pass at any point of the second surface 200. Thus, the amplitude is not too large to allow the head to pass, or to be able to deposit several strands at a time.

[0104] exist Figures 7 to 10In the example shown, the minimum points of all circumferential undulation curves are distributed on circles of the same radius and have the same radius as the arc 20 forming the junction between the first surface 100 and the second surface 200. Of course, if the minimum points of all circumferential undulation curves are distributed on circles of the same radius, but the radius is greater than the radius of the arc forming the junction between the first surface and the second surface, then the framework of the present invention will not be deviated. If the minimum points of each circumferential undulation curve are distributed on circles of different radii, as long as the radius is greater than the radius of the arc forming the junction between the first surface and the second surface, then the framework of the present invention will not be deviated.

[0105] It does not deviate from the framework of the invention if the inflection points of all circumferential relief curves are distributed on a circle of the same radius and have the same radius as the arc forming the junction between the first surface and the second surface.

[0106] like Figures 7 to 10 As shown, in the axial direction D A The farther from the junction between the first surface 100 and the second surface 200 , the greater the amplitude of the circumferential undulation curves 21 , 22 , 23 , 24 , 25 .

[0107] The curve length of each of the circumferential undulating curves 21, 22, 23, 24, 25 depends on the curve distance of the circumferential undulating curves 21, 22, 23, 24, 25 relative to the junction between the first surface 100 and the second surface 200. By using the curve length of each of the circumferential undulating curves 21, 22, 23, 24, 25 determined at the end of the first step and the second step, the curve length of each of the circumferential undulating curves 21, 22, 23, 24, 25 relative to the junction between the first surface 100 and the second surface 200 is determined. 总计 ) defined by the arc length and curve length, it can be concluded that the curve lengths of the circumferential undulations of the curves 21, 22, 23, 24, 25 at a given curve distance from the junction are the previously described curve distances e1, e1+e2, e1+e2+e3, e1+e2+e3+e4, e1+e2+e3+e5, e1+e2+e3+e6, e1+e2+e3+e7, e1+e2+e3+e8, e1+e2+e3+e9, e1+e3+e10, e1+e2+e3+e111, e1+e2+e3+e12, e1+e2+e3+e4, e1+e3+e5 总计 The lengths of the associated arcs l1, l2, l3, l4, l5.

[0108] Therefore, when the circumferentially undulating curves 21, 22, 23, 24, and 25 are respectively from the curve distances e1, e1+e2, e1+e2+e3, e1+e2+e3+e4, e 总计 When leaving the junction, they have curve lengths l1, l2, l3, l4, l5 respectively.

[0109] like Fig. 9 and Fig.10 As shown, the second surface 200 is designed to extend in the direction D PThe curvatures 32 and 33 are arranged on the surface. Therefore, the distances e1, e2, e3, e4, e 总计 may not be straight lines, depending on their position on the second surface 200. These curvatures 32, 33, called "corrective" curvatures, are necessary to limit the stresses during deformation of the covered component, mainly at the junction between the future body and the future flange. In fact, if the distances e1, e2, e3, e4, e 总计 is rectilinear, as was the case in the previous state, the distance between the junction and the end of the second surface 200 will vary depending on its position relative to the circumferential undulations.

[0110] For example, if the minimum points of all circumferential undulation curves are distributed on a circle having the same radius as the arc 20 forming the junction between the first surface 100 and the second surface 200, as shown in our example (see Figure 8 ), the straight-line distance between the joint portion and the end of the second surface 200 is shorter at the trough of the circumferential undulation and larger at the crest of the circumferential undulation. Therefore, when the covered component is deformed, several positions of the flange 2 are in the extension direction D E There will be a lack of length, which will create stresses in the composite material of component 4.

[0111] like Fig. 9 As shown, the second surface 200 extends in the direction D P The correction curvatures 32, 33 presented on the second surface 200 have at least one inflection point. P The correction curvature 32, 33 presented above may be part of an undulating curve oscillating between a maximum point and a minimum point.

[0112] The second surface 200 may further include a straight length 31, which is along the extension direction D P Extending from the joint toward the end of the surface 200 .

[0113] like Fig.10 As shown, along the extension direction D P All the correction curvatures 32, 33 and the straight length 31 of the second guide surface 200 have the same curve length, which has a value e 总计 Furthermore, the correction curvature 32, 33 or the straight length 31 along the extension direction D between the joint and the circumferentially undulating curve 21, 22, 23, 24 or 25 is determined during the previous step. P The curve distances travelled will have values ​​e1, e1+e2, e1+e2+e3, e1+e2+e3+e4 ... 总计 .

[0114] Therefore, we obtain a set of points C0, C1, C2, C3, C4, C5, which are located at the intersection of the straight length 31 (or the correction curvature 32, 33) and each circumferential undulation curve 21, 22, 23, 24, 25. E When deformed, each point in contact with points C0, C1, C2, C3, C4, C5 will be located at the position of point A0, A1, A2, A3, A4, A5 selected during the first step or the second step, respectively.

[0115] Finally, the circumferential relief of the second surface 200 and the parameters of the correction curvatures 32 , 33 , such as the amplitude or the radius of curvature, are selected to allow the automated fiber deposition head to pass at any point of the second surface 100 .

[0116] Thus, the design of the above-described covering geometry makes it possible to produce a suitable mold 500 for automatic fiber covering (AFP), the mold comprising a first surface 100 and a second surface 200, such as Fig.11 As shown. The mold can be produced by additive manufacturing or according to conventional manufacturing methods (such as machining or casting). The mold can be several separable parts instead of a single piece to facilitate (one or more) demoulding operations.

[0117] Now combine Figures 12 to 15 A method for manufacturing a composite material part is described, comprising at least the step of covering by automated placement of fibers on a mold designed as described above.

[0118] Fig.12 The structure of a deposition head 6 of an apparatus for implementing the AFP technique is schematically shown. The structure of the deposition head 6 is well known. The deposition head 6 is fed by a strip or fiber core 30.

[0119] The fiber strip or core 30 can be dry or impregnated. The fiber strip or core 30 can be impregnated with an aqueous suspension containing matrix precursor particles, impregnated with a thermosetting polymer or impregnated with a thermoplastic polymer, as described in document FR3062336A1. More generally, the strip 30 can be impregnated with a resin.

[0120] The fiber strip or core 30 can be conveyed by a conveying element 5 to a pressure-applying element 7 located at one side of the surfaces 100 and 200 covering the mold. The conveying element 5 is here in the form of a pair of rollers 5a and 5b rotating in pairs, between which the strip or core 30 is present. The conveying element 5 makes it possible to advance the strip or core 30 to the pressure-applying element 7. The pressure-applying element 7 applies pressure on the strip or core 30 so that it is deposited on the first surface 100 and the second surface 200 of the covering mold. The pressure-applying element 7 is here in the form of a roller.

[0121] The deposition head 6 may also include a heating element 9 located near the pressure applying element 7. In the case where the strip or core 30 is impregnated with a thermoplastic or thermosetting polymer, the heating element 9 may heat the impregnated strip or core 30 during deposition of the impregnated strip or core 30 to fluidize the polymer and thereby impart the desired adhesion to the deposited strip or core 30.

[0122] During deposition, the deposition head 6 is movable so as to apply the strip or core 30 to a first determined area covering the mould, for example to a portion of the mould's first surface 100. Once the application has been made to this first area, the cutting element 11 of the deposition head 6 cuts the strip or core 30. After this cutting, a deposition of a first fiber structure formed by a first section of the strip or core 30 is thus obtained on a first area of ​​the mould.

[0123] The formation of the blank is then continued by advancing the strip or core 30 in the deposition head 6 to the pressure applying element 7 by actuating the conveying element 5. The deposition head 6 can be moved so as to carry out the deposition of the core or strip 30 on a second area of ​​the mould. The deposition of a second fiber structure formed by a second section of the strip 30 is then obtained on a second area of ​​the mould in a manner similar to that previously described.

[0124] The production of the blank is then continued by depositing several further fiber structures in the same manner as described above, until the first surface 100 and the second surface 200 are covered.

[0125] The blank can then be chemically or thermally treated, depending on the nature of the covered fiber structure.

[0126] Then get Fig.13 The fiber blank 4b produced by covering is shown to include a body blank 1b covered on a first surface 100 and a flange blank 2b covered on a second surface 200. The body blank 1b and the flange blank 2b form the fiber blank 4b.

[0127] Then, the fiber blank 4b is shaped to obtain a fiber preform 4d having the shape of the component 4 to be produced, the fiber preform 4d comprising a main body preform 1d and a flange preform 2d. The shaping of the fiber blank 4b comprises shaping of the main body blank 1b and shaping of the flange blank 2b, which can be performed simultaneously or one after another.

[0128] According to a first variant, the shaping of the fiber blank 4b comprises a first intermediate step of shaping the flange blank 2b so as to obtain a flange positioned in the extension of the body blank 1b and extending from the body blank 1b along an intermediate extension direction D Pi The extended intermediate flange preform 2c, such as Fig.14This intermediate flange preform 2c is obtained by partial folding of the flange blank 2b, said folding being allowed by the undulations present on said flange blank 2b. In the first step of this first variant, the body blank 1b does not undergo any deformation.

[0129] Preferably, this variant corresponds to the case where the second surface 200 of the mold has been determined according to the second intermediate geometric surface 200b rather than directly according to the geometric mold of the flange 2. Therefore, the intermediate flange preform 2c has the shape of the above-mentioned second intermediate geometric surface 200b. Due to the specific geometry of the second surface 200 used to cover the flange blank 2b, the flange blank 2b is perfectly deformed so that each undulation curve 21, 22, 23, 24, 25 becomes an arc with an appropriate radius and so that each correction curvature 32, 33 is along the intermediate extension direction D Pi Therefore, there is no significant stress in the fibers of the intermediate flange preform 2c, especially at the junction between the main body blank 1b and the intermediate flange preform 2c.

[0130] In this first variant, the shaping of the fiber blank 4b also includes Fig.14 After the first step shown in Fig.15 During this second step, the main body blank 1b is circumferentially C The unfolding step enables the preform 1d to be obtained by reducing the size of the blank in a direction perpendicular to the axial direction D. A The angle value of the arc formed on each plane intersecting to "open" the main blank 1b: This angle is from the construction value θ C Decrease until the desired reference angle θ is reached R In addition, the unfolding step makes it possible to move the main body blank 1b along the axial direction D A The radius rendered is from the structure value R C1 , R C2 , R C3 Increase until the required reference value R is reached R1 , R R2 , R R3 Thus, at the end of the unfolding step, the body preform 1 d obtained has the same dimensions as the body 1 to be obtained.

[0131] The unfolding of the main body blank 1b further enables the intermediate flange preform 2c to be formed into a flange preform 2d having the shape and geometry of the flange 2 to be obtained. In fact, unfolding the main body blank 1b to obtain the main body preform 1d causes the inclination of the intermediate flange preform 2c to change. Therefore, before the second step, the main body blank 1b is formed along the intermediate extension direction D PiThe extended intermediate flange preform 2c becomes a preform extending from the main body preform 1d along the extension direction D after the second step. E Extended flange preform 2d.

[0132] In this first variant, an intermediate compaction step may be carried out between the first step and the second step.

[0133] According to a second variant, the shaping of the fiber blank 4b comprises a first step of shaping the body blank 1b to obtain a body preform 1d.

[0134] In this first step, the main body blank 1b is circumferentially C The unfolding step enables the preform 1d to be obtained by reducing the size of the blank in a direction perpendicular to the axial direction D. A The angle value of the arc formed on each plane intersecting to "open" the main blank 1b: This angle is from the construction value θ C Decrease until the desired reference angle θ is reached R In addition, the unfolding step makes it possible to move the main body blank 1b in the axial direction D A The radius rendered is constructed from the value R C1 , R C2 , R C3 Increase until the required reference value R is reached R1 , R R2 , R R3 Thus, at the end of the unfolding step, the body preform 1 d obtained has the same dimensions as the body 1 to be obtained.

[0135] The unfolding of the body blank 1b further causes an intermediate shaping of the flange blank 2b, which makes it possible to obtain a transitional preform of the flange (variation not shown). In fact, unfolding the body blank 1b to obtain the body preform 1d causes the inclination of the flange blank 2b to change. Therefore, before the first step, the body blank 1b is formed along the extension direction D P The extended flange blank 2b becomes a flange transition preform extending from the main body blank 1d along the extension transition direction after the first step. As a reminder, the angle formed between the axial direction and another direction must be understood here as an angle from the surface of the blank or the main body preform toward the surface of the blank or the flange transition preform, and the angle is measured from the axial direction portion located on one side of the surface of the blank or the main body preform toward the surface of the blank or the flange transition preform.

[0136] Preferably, this variant corresponds to the case where the second surface 200 of the mold is determined directly from the geometrical mold of the flange 2, rather than from the second intermediate geometrical surface 200b as described above. Therefore, the flange transition preform always has the above-mentioned undulations.

[0137] In this first variant, the shaping of the fiber blank 4b also includes a second step of shaping the flange transition preform into a flange preform 2d. The flange preform 2d is obtained by folding the flange transition preform downwards, the folding being allowed by the undulations present on the flange transition preform. In the second step of this second variant, the body preform 1d does not undergo any deformation.

[0138] In this second variant, an intermediate compaction step may be performed between the first step and the second step.

[0139] In the first and second variants described here, carrying out these two steps separately allows better control of each step, in particular better control of the unfolding of the body blank 1 b and better control of the smoothing of the undulations initially present on the flange blank 2 b.

[0140] However, it may be desirable to quickly shape the fiber blank 4b of the component immediately. In this third variant, the shaping of the fiber blank 4b into the fiber preform 4d of the component 4 is done in a single step, which includes unfolding the body blank 1b and completely folding, and smoothing the undulations of the flange blank 2b.

[0141] At the end of each of the three variants described above, a fiber preform 4d of the component to be produced is obtained, including a body preform 1d of the body 1 to be produced and a flange preform 2d of the flange 2 to be produced, such as Fig.15 Due to the specific geometry of the second surface 200 for covering the flange blank 2b, the flange blank 2b is perfectly deformed so that each undulating curve 21, 22, 23, 24, 25 becomes an arc with a suitable radius of the flange 2 to be produced, and each correction curvature 32, 33 is in the extension direction D E Therefore, there is no significant stress in the fibers of the fiber preform 4d, especially at the junction between the body preform 1d and the flange preform 2d.

[0142] The unfolding and shaping of the fiber blank 4b can be carried out using one or more reference mandrels having the shape of the body 1 to be produced, the flange 2 to be produced or the required intermediate flange preform 2c. Thus, the fiber blank is unfolded, shaped or smoothed to match the shape of the mandrel (s). The shaping of the fiber blank 4b can be carried out by mechanical deformation. The shaping of the fiber blank 4b can also be carried out using an air bag.

[0143] The fiber preform 4 thus obtained can then be subjected to a heat treatment, if this step has not already been carried out, in order to form a matrix, so as to obtain the final component 4 or at least one intermediate component close to the final component 4 .

[0144] If it is desired to manufacture a composite component that is completely rotated around an axis of revolution, including a complete body of revolution and a flange extending from one end of the body of revolution, it can be manufactured by producing several sections of the component distributed around the axis of revolution and then assembling the sections to obtain the desired component. Since the sections of the component have a partial revolution, they can be produced according to the above-mentioned manufacturing method. For example, Fig.16 As shown, two components 4 can be manufactured as described above and then assembled to form a complete revolved component 40 having an axis of revolution A.

[0145] In this application, thickness is neglected for geometrical considerations. If one wishes to consider the thickness of components, fiber blanks and fiber preforms, it is necessary to refer to the middle surface and the neutral length in order to balance the tension and compression effects of the upper and lower surfaces.

[0146] The expression "comprising... and between..." must be understood as including the boundaries.

Claims

1. A method for determining the geometry of a covering mold (500) for producing a blank (4b) for a composite component (4), the component (4) comprising a partially revolved body (1) having a plurality of longitudinal axes (D A ) is guided by an axis (A) and has a A ) given one or more reference radii (R R1 , R R2 , R R3 ), the main body (1) is arranged along the circumferential direction (D C ) locally around the axial direction (D A ), and the component (4) comprises at least one flange (2), the at least one flange extending from one end of the main body (1) along an extension direction (D E ) is extended, the method comprising: - determine the A ) is a first surface of revolution (100) of the axis of the guide, wherein the first surface (100) is along the circumferential direction (D C ) around the axial direction (D A )extend, - Determine the direction of extension (D P ) is located in the extension of the first surface (100) in the second surface (200), the axial direction (D A ) and the extension direction (D P ) is greater than the axial direction (D A ) and extension direction (D E ), the second surface (200) is in the extension direction (D P ) has a circumferential direction (D C ) successively follow one another, each circumferential undulation (21, 22, 23, 24, 25) corresponding to a circular arc belonging to the flange (2) to be produced, the curve length of said undulation (21, 22, 23, 24, 25) corresponding to the length (l1, l2, l3, l4, l5) of said circular arc, The method is characterized in that the first revolution surface (100) is arranged along an axial direction (D A ) presents one or more radii (R C1 , R C2 , R C3 ) is smaller than along the axial direction (D A ) of the same position (r1, r2, r3) R1 , R R2 , R R3 ), the first surface (100) corresponds to a surface having the shape of the body (1) to be produced in the circumferential direction (D C ), The second surface (200) is arranged in the extension direction (D P ) has a correction curvature (32, 33) on the flange (2), so that all points of each circumferential undulating curve (21, 22, 23, 24, 25) have the same curve distance with the junction of the first surface (100) and the second surface (200), the curve distance belongs to the second surface (200), and has a curve distance (e1, e1+e2, e1+e2+e3, e1+e2+e3+e4, e1+e2+e3+e5, e1+e2+e3+e6, e1+e2+e3+e7, e1+e2+e3+e8, e1+e2+e3+e9, e1+e2+e4+e10) between the arc corresponding to the circumferential undulating curve (21, 22, 23, 24, 25) belonging to the flange (2) to be produced and the junction between the flange (2) to be produced and the body (1) 总计 ) value.

2. The determination method according to claim 1, characterized in that: The inflection point of each circumferential undulation curve (21, 22, 23, 24, 25) is contained in the same circle.

3. The determination method according to claim 1 or 2, characterized in that: The minimum point of each circumferential undulation curve (21, 22, 23, 24, 25) is contained in the same circle, and the radius of the circle is greater than or equal to the radius of the arc (20) forming a junction between the first surface (100) and the second surface (200).

4. The determination method according to any one of claims 1 to 3, characterized in that: The correction curvature (33) located at the maximum point of the circumferential undulation has a larger curvature radius than the correction curvature (32) located at the inflection point of the circumferential undulation.

5. The determination method according to any one of claims 1 to 4, characterized in that: The flange (2) to be produced comprises rounded corners at its junction with the body (1) to be produced.

6. A method for manufacturing a composite material component (4), the component (4) comprising: A partially revolved body (1) having a A ) is guided by an axis (A) and has a A ) given one or more reference radii (R R1 , R R2 , R R3 ), the main body (1) is arranged along the circumferential direction (D C ) locally around the axial direction (D A ) extends; and comprises at least one flange (2), wherein the at least one flange extends from one end of the main body (1) along an extension direction (D E ) is extended, the method comprising: - forming a fiber blank (4b) of the component (4) to be obtained by depositing a plurality of fiber layers by automatically placing fibers on a covering mold (500) comprising a first covering surface and a second covering surface located in extension of the first covering surface, the first covering surface and the second covering surface respectively corresponding to at least a first surface (100) and a second surface (200) determined according to the method for determining the geometry of a covering mold according to any one of claims 1 to 5, the portion of the blank (4b) produced on the first covering surface corresponding to the blank (1b) of the body, and the portion of the blank (4b) produced on the second covering surface corresponding to the blank (2b) of the flange, - shaping the fiber blank (4b) to obtain a fiber preform (4d), said shaping comprising: C ) unfold the main body blank (1b) to obtain a body having a shape along the axial direction (D A ) of one or more reference radii (R R1 , R R2 , R R3 ) and having the shape of the main body (1) to be produced, and forming the flange blank (2b) to obtain a flange from the end of the main body preform (1d) along the extension direction (D E ) and having the shape of the flange (2) to be produced, and then - Densification of said fiber preform (4d) by means of a matrix, thereby obtaining a composite component (4).

7. The manufacturing method according to claim 6, characterized in that: The unfolding of the main body blank (1b) and the forming of the flange blank (2b) are carried out simultaneously.

8. The manufacturing method according to claim 6, characterized in that: First, the intermediate forming of the flange blank (2b) is performed to obtain a flange blank (2b) extending from the end of the main body blank (1b) along the intermediate extension direction (D Pi ) extends in the middle flange preform (2c), wherein the middle extension direction (D Pi ) and the axial direction (D A ) is smaller than the extension direction (D P ) and the axial direction (D A ), but is greater than the angle between the extension direction (D E ) and the axial direction (D A ), then unfolding the main body blank to obtain the main body preform, thereby forming the intermediate flange preform (2c) to obtain the main body preform (1d) along the extension direction (D E ) and having the shape of the flange (2) to be produced.

9. A method for manufacturing a composite material component (40), the component (40) comprising: a body of complete revolution having an axis (A) directed in an axial direction, said body having one or more given reference radii, said body extending partially around said axial direction in a circumferential direction; and at least one flange, the flange extending from one end of the body along an extension direction, the method comprising: - producing a component segment (4), the component segment comprising: a partially revolved main body segment (1), the main body segment having an axis guided in an axial direction and having a given reference radius, the main body segment (1) partially extending around the axial direction in a circumferential direction; and at least one flange segment (2), the flange segment extending from one end of the main body segment (1) in an extension direction, the manufacturing of the component segment (4) being performed according to the manufacturing method according to any one of claims 6 to 8, - Assembling the component segments (4) to obtain a composite component (40) with a complete revolution.

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