WO2020016044A1 - Method for producing a metal material reinforced with an organic matrix composite - Google Patents

Method for producing a metal material reinforced with an organic matrix composite Download PDF

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Publication number
WO2020016044A1
WO2020016044A1 PCT/EP2019/068296 EP2019068296W WO2020016044A1 WO 2020016044 A1 WO2020016044 A1 WO 2020016044A1 EP 2019068296 W EP2019068296 W EP 2019068296W WO 2020016044 A1 WO2020016044 A1 WO 2020016044A1
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WO
WIPO (PCT)
Prior art keywords
metal sheet
composite
resin
fibrous reinforcements
structural part
Prior art date
Application number
PCT/EP2019/068296
Other languages
French (fr)
Inventor
Jean-Pierre Cauchois
Original Assignee
Institut De Soudure
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institut De Soudure filed Critical Institut De Soudure
Priority to EP19735360.0A priority Critical patent/EP3823829A1/en
Publication of WO2020016044A1 publication Critical patent/WO2020016044A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/08—Impregnating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/685—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by laminating inserts between two plastic films or plates
    • B29C70/686—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by laminating inserts between two plastic films or plates the inserts being sheets or documents, e.g. ID cards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/78—Moulding material on one side only of the preformed part
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0038—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving application of liquid to the layers prior to lamination, e.g. wet laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
    • B32B37/0053—Constructional details of laminating machines comprising rollers; Constructional features of the rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/12—Deep-drawing

Definitions

  • the present invention relates to a method of manufacturing a metallic material reinforced with an organic matrix composite.
  • the invention also relates to a process for obtaining a structural part in a material resulting from such a manufacturing process.
  • the structure of a vehicle also called a white body, is today mainly made of steel. Although the mechanical properties of steel have changed, its particularly high density (of the order of 7.8) remains a major obstacle to lightening the structure. Reducing the weight of the body in white therefore necessarily involves the introduction of lighter materials and in particular composites whose density can be up to substantially five times lower than that of steel.
  • the composite patches represent additional parts to be fixed to the structure, which generates an increase in assembly time and therefore in the cost of the vehicle.
  • the object of the invention is therefore to propose a method for manufacturing structural parts in a reinforced metallic material which at least partly obviates the aforementioned drawbacks.
  • the invention provides a method of manufacturing a metallic material reinforced with an organic matrix composite.
  • the process includes the steps of:
  • the resin completely covers the upper surface of the metal sheet
  • the resin partially covers the upper surface of the metal sheet.
  • the resin partially covers the upper surface of the metal sheet in the lengthwise direction of said sheet.
  • the metal sheet is obtained by cutting an unwound strip from a coil.
  • the material can thus be produced in an industrial and continuous manner, that is to say being more particularly compatible with the production rates of the automotive industry.
  • the fibrous reinforcements comprise carbon fibers and / or glass fibers.
  • carbon fibers and glass fibers make it possible to obtain a composite having good mechanical properties while being significantly lighter than the corresponding metal.
  • the fibrous reinforcements come from a roller for distributing glass fibers and / or carbon fibers.
  • the fibers can thus be distributed in an industrial and continuous manner, that is to say being more particularly compatible with the production rates of the automotive industry.
  • 1 / invention also relates to a process for obtaining a structural part in a reinforced metallic material resulting from such a manufacturing process.
  • the method comprises the additional steps of;
  • FIG. 1 schematically represents a process for manufacturing a reinforced metallic material according to a particular embodiment of the invention
  • FIG. 2 is a perspective view of a material resulting from the process illustrated in FIG. 1,
  • FIG. 3 schematically represents the process for obtaining a structural part in the material illustrated in FIG. 2,
  • FIG. 4 is a perspective view of a structural part obtained from the material illustrated in FIG. 2.
  • FIG. 5 is a perspective view of a structural part obtained in a variant of the material illustrated in FIG. 2.
  • a coil 1 of a metal strip is rotatably mounted around a axis Y1 orthogonal to the plane of said figure.
  • the unwinding of the reel takes place along a horizontal axis XI to unwind the strip along the same axis XI to form a metal sheet 1.1.
  • the axis Y1 of rotation of the reel 1 is orthogonal to the axis XI of unwinding of the strip.
  • a distribution roller 2 of fibrous reinforcements 2.1 is mounted so as to be able to rotate about an axis Y2 orthogonal to the plane of FIG. 1.
  • the axis Y2 of rotation of the distribution roller 2 is parallel to the axis Y1 of rotation of the reel 1.
  • the unwinding of the fibrous reinforcements 2.1 takes place, at the outlet of the distribution roller 2, along an axis X2 forming an angle a with the axis XI of unwinding of the reel 1.
  • the angle a is here substantially equal to 50 degrees.
  • the fibrous reinforcements comprise for example carbon fibers and / or glass fibers.
  • the metal sheet 1.1 and the fibrous reinforcements 2.2 then meet to pass together between a first cylinder 3.1 and a second cylinder 3.2 intended to guide the unwinding of the coil 1 and the distribution of the fibrous reinforcements 2.1 along the axis XI.
  • the first and second guide cylinders 3.1, 3.2 are arranged one above the other and are mounted free in rotation around axes parallel to the axis Y1 of rotation of the coil 1 and the axis Y2 of rotation of the distribution roller 2.
  • the metal sheet 1.1 and the fibrous reinforcements 2.1 are respectively in contact with the first cylinder 3.1 and the second guide cylinder 3.2.
  • the fibrous reinforcements 2.1 thus cover, at the outlet of the guide cylinders 3.1, 3.2, at least part of an upper surface of the metal sheet 1.1.
  • the rotational speeds of the reel 1 and of the distribution roller 2 are coordinated so that the distribution of the fibrous reinforcements in output of the guide cylinders 3.1, 3.2 is synchronized with the unwinding of the metal sheet 1.1 according to XI.
  • a distributor 4 of a liquid thermoplastic resin 5 is arranged at the outlet from the guide cylinders 3.1, 3.2.
  • the resin 5 is deposited by gravity on the upper surface of the metal sheet 1.1 so as to impregnate the fibrous reinforcements 2.1 of said resin 5.
  • the fibrous reinforcements 2.1 and the resin 5 then form a composite with an organic matrix.
  • Resin 5 is, for example, Elium® resin from the company Arkema.
  • the fibrous reinforcements 2.1 here form a grid and cover, with the resin 5, only partially the upper surface of the metal sheet 1.1.
  • the composite thus forms a strip extending substantially in the center and in the direction of the length of said sheet 1.1.
  • a total covering of the upper surface of the metal sheet 1.1 by the composite is also possible, just like a partial covering in the width direction.
  • heating means 6 for heating the composite to a predetermined temperature to polymerize the resin 5 under the effect of a catalyst.
  • the predetermined temperature for the polymerization of the resin 5 is preferably between 50 and 180 degrees Celsius (° C).
  • the heating means 6 can, for example, be of the infrared, forced air type, or even by induction of the metal sheet 1.1.
  • the horizontal behavior of the metal sheet 1.1 and of the composite is ensured by cylinders 7 for conveying arranged in particular below the heating means 6.
  • the metal sheet / composite assembly then pass between compacting and impregnation cylinders 8.
  • the cylinders 8 in particular exert pressure on the composite in the direction of the metal sheet 1.1 to bond said composite to said metal sheet and thus form a metallic material reinforced by an organic matrix composite.
  • the material is then in the form of a strip of width substantially equal to that of the metal sheet 1.1.
  • the upper surface of the metal sheet 1.1 has previously undergone a surface preparation operation P making it possible to improve the adhesion between the resin 5 in the polymerization phase and the upper surface of the metal sheet 1.1
  • the preparation operation surface P can for example be carried out by laser, by mechanical abrasion or by chemical treatment.
  • a cutting tool 9 makes it possible to cut a portion 10 of said material to predefined dimensions corresponding substantially to those of a structural part 11. As illustrated in FIG. 3, the cutting tool 9 allows for example to define a length L of the portion 10 of material and to create lateral 10.1 recesses in areas not covered by the composite.
  • the width 1 of the portion 10 is here substantially equal to that of the metal sheet 1.1.
  • the cut portion 10 is heated to a predefined temperature by means of a heating system 12 (FIG. 3).
  • the heating of the cut portion 10 makes it possible to prepare its stamping without risking the appearance of zones of fatigue or even rupture of the material.
  • the predefined heating temperature depends on the intrinsic qualities of the composite and is preferably between 150 ° C and 350 ° C.
  • the heated portion 10 is thus inserted between a die 13.1 and a punch 13.2 making it possible to give said portion 10 the shape of the structural part 11.
  • the structural part 11 here has the shape of a tunnel whose lateral ends 11.1 are not covered with composite.
  • the lateral ends 11.1 can advantageously serve as areas for fixing by welding the structural part 11 to one or more metallic elements that said structural part 11 will overlap.
  • FIG. 5 illustrates a structural part 11 ′ of shape similar to the structural part 11 previously described. The difference lies in particular in the fact that the structural part 11 ′ is made from a material in which the composite covers the entire metal sheet 1.1.
  • the fibrous reinforcements comprise carbon and / or glass fibers, they can also comprise other types of fibers such as for example vegetable fibers, aramid or polypropylene fibers ...

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a method for producing a metal material reinforced with an organic matrix composite, the method comprising the steps of: - covering an upper surface of a metal sheet with fibrous reinforcements, - depositing a liquid thermoplastic resin on the upper surface of the metal sheet so as to embed the fibrous reinforcements in said resin to form an organic matrix composite, and - heating the composite to a predetermined temperature before pressing the composite in the direction of the metal sheet in order to bond said composite to said metal sheet.

Description

Procédé de fabrication d'un matériau métallique renforcé par un composite à matrice organique  Method of manufacturing a metallic material reinforced with an organic matrix composite
La présente invention concerne un procédé de fabrication d'un matériau métallique renforcé par un composite à matrice organique. L'invention concerne également un procédé d'obtention d'une pièce structurelle dans un matériau issu d'un tel procédé de fabrication.  The present invention relates to a method of manufacturing a metallic material reinforced with an organic matrix composite. The invention also relates to a process for obtaining a structural part in a material resulting from such a manufacturing process.
ARRIERE-PLAN TECHNOLOGIQUE DE L'INVENTION TECHNOLOGICAL BACKGROUND OF THE INVENTION
Avec l'augmentation de leurs dimensions et du nombre d'équipements dont ils sont pourvus, les véhicules ont vu leur poids croître. Or, 75 % de la consommation de carburant est aujourd'hui directement liée à la masse du véhicule. L'allègement des véhicules est donc devenu un objectif incontournable pour tous les constructeurs automobiles, notamment depuis que la règlementation les y pousse. Des normes environnementales exigent en effet la réduction des émissions de polluants, notamment de dioxyde de carbone <C02 ) . With the increase in their dimensions and the number of equipment with which they are provided, vehicles have seen their weight increase. However, 75% of fuel consumption today is directly linked to the mass of the vehicle. Lightening vehicles has therefore become an unavoidable objective for all car manufacturers, especially since the regulations push them to do so. Environmental standards indeed require the reduction of emissions of pollutants, in particular carbon dioxide <C02).
La structure d'un véhicule, appelée aussi caisse en blanc, est aujourd'hui majoritairement constituée d'acier. Bien que les propriétés mécaniques de l'acier aient évolué, sa densité particulièrement élevée (de l'ordre de 7,8) reste un obstacle majeur à l'allègement de 1a structure. Réduire le poids de la caisse en blanc passe donc nécessairement par l'introduction de matériaux plus légers et en particulier de composites dont la densité peut être jusqu'à sensiblement cinq fois inférieure à celle de l'acier.  The structure of a vehicle, also called a white body, is today mainly made of steel. Although the mechanical properties of steel have changed, its particularly high density (of the order of 7.8) remains a major obstacle to lightening the structure. Reducing the weight of the body in white therefore necessarily involves the introduction of lighter materials and in particular composites whose density can be up to substantially five times lower than that of steel.
Une solution consiste à utiliser, dans les zones les plus sollicitées de la structure, des patchs composites à matrice organique. Ces patchs peuvent être collés, rivetés ou vissés sur la pièce structurelle, une fois celle-ci en forme, pour former des renforts locaux et ainsi se substituer à une augmentation d' épaisseur de la pièce structurelle sur laquelle ils sont fixés. Toutefois, cette technique nécessite l'investissement d'outillages spécifiques dédiés à la réalisation de ces renforts. La fabrication de patchs composites peut dès lors s'avérer extrêmement coûteuse, réservant ainsi leur utilisation aux véhicules haut de gamme . One solution is to use, in the most stressed areas of the structure, composite patches with an organic matrix. These patches can be glued, riveted or screwed onto the structural part, once it is in shape, to form local reinforcements and thus replace an increase in thickness of the structural part to which they are fixed. However, this technique requires the investment of specific tools dedicated to the production of these reinforcements. The manufacture of composite patches can therefore prove to be extremely expensive, thus reserving their use for high-end vehicles.
Qui plus est, les patchs composites représentent des pièces supplémentaires à fixer sur la structure, ce qui engendre une augmentation du temps d'assemblage et donc du coût du véhicule.  What is more, the composite patches represent additional parts to be fixed to the structure, which generates an increase in assembly time and therefore in the cost of the vehicle.
OBJET DE L' INVENTION  OBJECT OF THE INVENTION
L'invention a donc pour objet de proposer un procédé de fabrication de pièces structurelles dans un matériau métallique renforcé qui obvie au moins en partie aux inconvénients précités.  The object of the invention is therefore to propose a method for manufacturing structural parts in a reinforced metallic material which at least partly obviates the aforementioned drawbacks.
PRESENTATION DE L'INVENTION  PRESENTATION OF THE INVENTION
A cet effet, l'invention propose un procédé de fabrication d'un matériau métallique renforcé par un composite à matrice organique. Le procédé comporte les étapes de :  To this end, the invention provides a method of manufacturing a metallic material reinforced with an organic matrix composite. The process includes the steps of:
- recouvrir de renforts fibreux la surface supérieure d'une feuille métallique,  - cover the upper surface with a metal sheet with fibrous reinforcements,
- déposer une résine thermoplastique liquide sur la surface supérieure de la feuille métallique de façon à noyer les renforts fibreux dans ladite résine pour former un composite à matrice organique, et  depositing a liquid thermoplastic resin on the upper surface of the metal sheet so as to embed the fibrous reinforcements in said resin to form an organic matrix composite, and
- chauffer le composite jusqu'à une température prédéterminée pour polymériser la résine sous l'effet d'un catalyseur avant d'exercer une pression sur le composite en direction de la feuille métallique pour adhérer ledit composite à ladite feuille métallique.  - Heating the composite to a predetermined temperature to polymerize the resin under the effect of a catalyst before exerting pressure on the composite in the direction of the metal sheet to adhere said composite to said metal sheet.
L'élaboration du composite est ainsi effectuée directement sur la feuille métallique, ce qui permet de diminuer le temps nécessaire à la fabrication du matériau renforcé, mais aussi d' en minimiser les outils nécessaires , The development of the composite is thus carried out directly on the metal sheet, which makes it possible to reduce the time necessary for the manufacture of the material. strengthened, but also to minimize the necessary tools,
Selon un mode de réalisation particulier de l'invention, la résine recouvre totalement la surface supérieure de la feuille métallique,  According to a particular embodiment of the invention, the resin completely covers the upper surface of the metal sheet,
Selon un autre mode de réalisation de l'invention, la résine recouvre partiellement la surface supérieure de la feuille métallique.  According to another embodiment of the invention, the resin partially covers the upper surface of the metal sheet.
De manière particulière, la résine recouvre partiellement la surface supérieure de la feuille métallique dans le sens de la longueur de ladite feuille.  In particular, the resin partially covers the upper surface of the metal sheet in the lengthwise direction of said sheet.
Selon un mode de réalisation préféré de l'invention, la feuille métallique est obtenue par découpage d'une bande déroulée d'une bobine.  According to a preferred embodiment of the invention, the metal sheet is obtained by cutting an unwound strip from a coil.
Le matériau peut ainsi être réalisé de façon industrielle et continue, c'est-à-dire en étant plus particulièrement compatible avec les cadences de production de l'industrie automobile.  The material can thus be produced in an industrial and continuous manner, that is to say being more particularly compatible with the production rates of the automotive industry.
Selon une caractéristique particulière, les renforts fibreux comportent des fibres de carbone et/ou des fibres de verre.  According to a particular characteristic, the fibrous reinforcements comprise carbon fibers and / or glass fibers.
De par leur flexibilité et leur résistance élevée à la traction et à la compression, les fibres de carbone, et les fibres de verre permettent d'obtenir un composite ayant de bonnes propriétés mécaniques tout en étant nettement plus léger que le métal correspondant.  Due to their flexibility and their high tensile and compressive strength, carbon fibers and glass fibers make it possible to obtain a composite having good mechanical properties while being significantly lighter than the corresponding metal.
Selon un mode de réalisation préféré de l'invention, les renforts fibreux sont issus d'un rouleau de distribution de fibres de verre et/ou de fibres de carbone.  According to a preferred embodiment of the invention, the fibrous reinforcements come from a roller for distributing glass fibers and / or carbon fibers.
Les fibres peuvent ainsi être distribuées de façon industrielle et continue, c'est-à-dire en étant plus particulièrement compatible avec les cadences de production de l'industrie automobile. 1/ invention concerne également un procédé d'obtention d'une pièce structurelle dans un matériau métallique renforcé issu d'un tel procédé de fabrication. The fibers can thus be distributed in an industrial and continuous manner, that is to say being more particularly compatible with the production rates of the automotive industry. 1 / invention also relates to a process for obtaining a structural part in a reinforced metallic material resulting from such a manufacturing process.
Selon l' invention, le procédé comporte les étapes supplémentaires de ;  According to the invention, the method comprises the additional steps of;
- découper une portion de matériau métallique renforcé à des dimensions prédéfinies correspondant sensiblement à celles de la pièce structurelle,  - cutting a portion of reinforced metallic material to predefined dimensions corresponding substantially to those of the structural part,
- chauffer la portion découpée jusqu'à une température prédéterminée, puis  - heat the cut portion to a predetermined temperature, then
- estamper la portion chauffée pour obtenir la forme de la pièce structurelle.  - stamp the heated portion to obtain the shape of the structural part.
DESCRIPTION DES FIGURES  DESCRIPTION OF THE FIGURES
L'invention sera mieux comprise à la lumière de la description qui suit, laquelle est purement illustrative et non limitative, et doit être lue en regard des figures annexées parmi lesquelles :  The invention will be better understood in the light of the description which follows, which is purely illustrative and not limiting, and should be read with reference to the appended figures among which:
- la figure 1 représente schématiquement un procédé de fabrication d'un matériau métallique renforcé selon un mode de réalisation particulier de l'invention,  FIG. 1 schematically represents a process for manufacturing a reinforced metallic material according to a particular embodiment of the invention,
- la figure 2 est une vue en perspective d'un matériau issu du procédé illustré à la figure 1,  FIG. 2 is a perspective view of a material resulting from the process illustrated in FIG. 1,
- la figure 3 représente schématiquement le procédé d'obtention d'une pièce structurelle dans le matériau illustré à la figure 2,  FIG. 3 schematically represents the process for obtaining a structural part in the material illustrated in FIG. 2,
- la figure 4 est une vue en perspective d'une pièce structurelle obtenue dans le matériau illustré à la figure 2.  FIG. 4 is a perspective view of a structural part obtained from the material illustrated in FIG. 2.
- la figure 5 est une vue en perspective d'une pièce structurelle obtenue dans une variante du matériau illustré à la figure 2.  FIG. 5 is a perspective view of a structural part obtained in a variant of the material illustrated in FIG. 2.
DESCRIPTION DETAILLEE D'UN MODE DE REALISATION  DETAILED DESCRIPTION OF AN EMBODIMENT
PARTICULIER DE L'INVENTION  PARTICULAR OF THE INVENTION
En référence à la figure 1, une bobine 1 d'une bande de métal est montée mobile en rotation autour d'un axe Y1 orthogonal au plan de ladite figure. Le dévidement de la bobine s'opère suivant un axe XI horizontal pour dérouler la bande suivant le même axe XI pour former une feuille métallique 1.1. L'axe Y1 de rotation de la bobine 1 est orthogonal à l'axe XI de déroulement de la bande. Referring to Figure 1, a coil 1 of a metal strip is rotatably mounted around a axis Y1 orthogonal to the plane of said figure. The unwinding of the reel takes place along a horizontal axis XI to unwind the strip along the same axis XI to form a metal sheet 1.1. The axis Y1 of rotation of the reel 1 is orthogonal to the axis XI of unwinding of the strip.
De la même manière, un rouleau de distribution 2 de renforts fibreux 2.1 est monté mobile en rotation autour d'un axe Y2 orthogonal au plan de la figure 1. L'axe Y2 de rotation du rouleau de distribution 2 est parallèle à l'axe Y1 de rotation de la bobine 1. Le déroulement des renforts fibreux 2.1 s'opère, en sortie du rouleau de distribution 2, suivant un axe X2 formant un angle a avec l'axe XI de dévidement de la bobine 1. L'angle a est ici sensiblement égal à 50 degrés. Les renforts fibreux comportent par exemple des fibres de carbone et/ou des fibres de verre.  In the same way, a distribution roller 2 of fibrous reinforcements 2.1 is mounted so as to be able to rotate about an axis Y2 orthogonal to the plane of FIG. 1. The axis Y2 of rotation of the distribution roller 2 is parallel to the axis Y1 of rotation of the reel 1. The unwinding of the fibrous reinforcements 2.1 takes place, at the outlet of the distribution roller 2, along an axis X2 forming an angle a with the axis XI of unwinding of the reel 1. The angle a is here substantially equal to 50 degrees. The fibrous reinforcements comprise for example carbon fibers and / or glass fibers.
La feuille métallique 1.1 et les renforts fibreux 2.2 se rejoignent alors pour passer ensemble entre un premier cylindre 3.1 et un deuxième cylindre 3.2 destinés à guider le déroulement de la bobine 1 et la distribution des renforts fibreux 2.1 suivant l'axe XI.  The metal sheet 1.1 and the fibrous reinforcements 2.2 then meet to pass together between a first cylinder 3.1 and a second cylinder 3.2 intended to guide the unwinding of the coil 1 and the distribution of the fibrous reinforcements 2.1 along the axis XI.
Les premier et deuxième cylindres 3.1, 3.2 de guidage sont agencés l'un au-dessus de l'autre et sont montés libres en rotation autour d'axes parallèles à l'axe Y1 de rotation de la bobine 1 et de l'axe Y2 de rotation du rouleau de distribution 2. La feuille métallique 1.1 et les renforts fibreux 2.1 sont respectivement en contact avec le premier cylindre 3.1 et le deuxième cylindre 3.2 de guidage. Les renforts fibreux 2.1 recouvrent ainsi, en sortie des cylindres 3.1, 3.2 de guidage, au moins une partie d'une surface supérieure de la feuille métallique 1.1.  The first and second guide cylinders 3.1, 3.2 are arranged one above the other and are mounted free in rotation around axes parallel to the axis Y1 of rotation of the coil 1 and the axis Y2 of rotation of the distribution roller 2. The metal sheet 1.1 and the fibrous reinforcements 2.1 are respectively in contact with the first cylinder 3.1 and the second guide cylinder 3.2. The fibrous reinforcements 2.1 thus cover, at the outlet of the guide cylinders 3.1, 3.2, at least part of an upper surface of the metal sheet 1.1.
Il est à noter que les vitesses de rotation de la bobine 1 et du rouleau de distribution 2 sont coordonnées de façon à ce que la distribution des renforts fibreux en sortie des cylindres de guidages 3.1, 3.2 soit synchronisée avec le déroulement de la feuille métallique 1.1 suivant XI. It should be noted that the rotational speeds of the reel 1 and of the distribution roller 2 are coordinated so that the distribution of the fibrous reinforcements in output of the guide cylinders 3.1, 3.2 is synchronized with the unwinding of the metal sheet 1.1 according to XI.
Un distributeur 4 d'une résine 5 thermoplastique liquide est agencé en sortie des cylindres 3.1, 3.2 de guidage. La résine 5 est déposée par gravité sur la surface supérieure de la feuille métallique 1.1 de façon à imprégner les renforts fibreux 2.1 de ladite résine 5. Les renforts fibreux 2.1 et la résine 5 forment alors un composite à matrice organique. La résine 5 est par exemple de la résine Elium ® de la société ARKEMA.  A distributor 4 of a liquid thermoplastic resin 5 is arranged at the outlet from the guide cylinders 3.1, 3.2. The resin 5 is deposited by gravity on the upper surface of the metal sheet 1.1 so as to impregnate the fibrous reinforcements 2.1 of said resin 5. The fibrous reinforcements 2.1 and the resin 5 then form a composite with an organic matrix. Resin 5 is, for example, Elium® resin from the company Arkema.
Comme illustré à la figure 2, les renforts fibreux 2.1 forment ici un quadrillage et ne recouvrent, avec la résine 5, que partiellement la surface supérieure de la feuille métallique 1.1. Le composite forme ainsi une bande s'étendant sensiblement au centre et dans le sens de la longueur de la dite feuille 1.1. Comme nous le verrons plus tard, un recouvrement total de la surface supérieure de la feuille métallique 1.1 par le composite est aussi envisageable, tout comme un recouvrement partiel dans le sens de la largueur.  As illustrated in FIG. 2, the fibrous reinforcements 2.1 here form a grid and cover, with the resin 5, only partially the upper surface of the metal sheet 1.1. The composite thus forms a strip extending substantially in the center and in the direction of the length of said sheet 1.1. As we will see later, a total covering of the upper surface of the metal sheet 1.1 by the composite is also possible, just like a partial covering in the width direction.
A la suite du distributeur 4 de résine 5 sont agencés des moyens de chauffe 6 pour chauffer le composite jusqu'à une température prédéterminée pour polymériser la résine 5 sous l'effet d'un catalyseur. La température prédéterminée pour la polymérisation de la résine 5 est de préférence comprise entre 50 et 180 degrés Celsius ( °C) . Les moyens de chauffe 6 peuvent par exemple être de type infrarouge, à air pulsé, voire par induction de la feuille métallique 1.1. La tenue horizontale de la feuille métallique 1.1 et du composite est assurée par des cylindres 7 de convoyage disposés notamment en dessous des moyens de chauffe 6.  Following the resin dispenser 4 5 are arranged heating means 6 for heating the composite to a predetermined temperature to polymerize the resin 5 under the effect of a catalyst. The predetermined temperature for the polymerization of the resin 5 is preferably between 50 and 180 degrees Celsius (° C). The heating means 6 can, for example, be of the infrared, forced air type, or even by induction of the metal sheet 1.1. The horizontal behavior of the metal sheet 1.1 and of the composite is ensured by cylinders 7 for conveying arranged in particular below the heating means 6.
Avant la fin de la polymérisation de la résine 5, l'ensemble feuille métallique/composite passent ensuite entre des cylindres 8 de compactage et d'imprégnation. Les cylindres 8 exercent notamment une pression sur le composite en direction de la feuille métallique 1.1 pour lier ledit composite à ladite feuille métallique et ainsi former un matériau métallique renforcé par un composite à matrice organique. Le matériau se présente alors sous forme d'une bande de largeur sensiblement égale à celle de la feuille métallique 1.1. Before the polymerization of the resin 5 has ended, the metal sheet / composite assembly then pass between compacting and impregnation cylinders 8. The cylinders 8 in particular exert pressure on the composite in the direction of the metal sheet 1.1 to bond said composite to said metal sheet and thus form a metallic material reinforced by an organic matrix composite. The material is then in the form of a strip of width substantially equal to that of the metal sheet 1.1.
Avantageusement, la surface supérieure de la feuille métallique 1.1 a préalablement subi une opération de préparation de surface P permettant d' améliorer l'adhérence entre la résine 5 en phase de polymérisation et la surface supérieure de la feuille métallique 1.1, L'opération de préparation de surface P peut par exemple être réalisée par laser, par abrasion mécanique ou par traitement chimique.  Advantageously, the upper surface of the metal sheet 1.1 has previously undergone a surface preparation operation P making it possible to improve the adhesion between the resin 5 in the polymerization phase and the upper surface of the metal sheet 1.1, The preparation operation surface P can for example be carried out by laser, by mechanical abrasion or by chemical treatment.
Un outil de découpe 9 permet de découper une portion 10 dudit matériau à des dimensions prédéfinies correspondant sensiblement à celles d' une pièce structurelle 11. Comme illustré à la figure 3, l'outil de coupe 9 permet par exemple de définir une longueur L de la portion 10 de matériau et de créer des évidements 10.1 latéraux dans des zones non recouvertes par le composite. La largeur 1 de la portion 10 est ici sensiblement égale à celle de la feuille métallique 1.1.  A cutting tool 9 makes it possible to cut a portion 10 of said material to predefined dimensions corresponding substantially to those of a structural part 11. As illustrated in FIG. 3, the cutting tool 9 allows for example to define a length L of the portion 10 of material and to create lateral 10.1 recesses in areas not covered by the composite. The width 1 of the portion 10 is here substantially equal to that of the metal sheet 1.1.
Par la suite, la portion 10 découpée est chauffée jusqu'à une température prédéfinie par l'intermédiaire d'un système de chauffage 12 (figure 3), Le réchauffement de la portion 10 découpée permet d'en préparer son estampage sans risquer l'apparition de zones de fatigue voire de rupture du matériau. La température prédéfinie de chauffage dépend des qualités intrinsèques du composite et est de préférence comprise entre 150 °C et 350 °C . La portion 10 chauffée est ainsi insérée entre une matrice 13.1 et un poinçon 13.2 permettant de donner à ladite portion 10 la forme de la pièce structurelle 11, A titre d'exemple, la pièce structurelle 11 a ici une forme de tunnel dont des extrémités latérales 11.1 ne sont pas recouvertes de composite. Les extrémités latérales 11.1 peuvent avantageusement servir de zones de fixation par soudure de la pièce structurelle 11 sur un ou des éléments métalliques que ladite pièce structurelle 11 viendra chevaucher. Subsequently, the cut portion 10 is heated to a predefined temperature by means of a heating system 12 (FIG. 3). The heating of the cut portion 10 makes it possible to prepare its stamping without risking the appearance of zones of fatigue or even rupture of the material. The predefined heating temperature depends on the intrinsic qualities of the composite and is preferably between 150 ° C and 350 ° C. The heated portion 10 is thus inserted between a die 13.1 and a punch 13.2 making it possible to give said portion 10 the shape of the structural part 11. By way of example, the structural part 11 here has the shape of a tunnel whose lateral ends 11.1 are not covered with composite. The lateral ends 11.1 can advantageously serve as areas for fixing by welding the structural part 11 to one or more metallic elements that said structural part 11 will overlap.
La figure 5 illustre une pièce structurelle 11' de forme similaire à la pièce structurelle 11 précédemment décrite. La différence réside notamment dans le fait que la pièce structurelle 11' est issu d'un matériau dans lequel le composite recouvre la totalité de la feuille métallique 1,1.  FIG. 5 illustrates a structural part 11 ′ of shape similar to the structural part 11 previously described. The difference lies in particular in the fact that the structural part 11 ′ is made from a material in which the composite covers the entire metal sheet 1.1.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit mais englobe toute variante entrant dans le champ de l'invention telle que définie par les revendications.  Of course, the invention is not limited to the embodiment described but encompasses any variant coming within the scope of the invention as defined by the claims.
Bien qu'ici les renforts fibreux comportent des fibres de carbone et/ou de verre, ils peuvent aussi comporter d' autres types de fibres comme par exemple des fibres végétales, des fibres d' aramide ou de polypropylène...  Although here the fibrous reinforcements comprise carbon and / or glass fibers, they can also comprise other types of fibers such as for example vegetable fibers, aramid or polypropylene fibers ...

Claims

REVENDICATIONS
1. Procédé de fabrication d' un matériau métallique renforcé par un composite à matrice organique, le procédé comportant les étapes de : 1. A method of manufacturing a metallic material reinforced with an organic matrix composite, the method comprising the steps of:
- recouvrir de renforts fibreux (2.1) la surface supérieure d'une feuille métallique (1.1),  - cover with fibrous reinforcements (2.1) the upper surface of a metal sheet (1.1),
- déposer une résine (5) thermoplastique liquide sur la surface supérieure de la feuille métallique de façon à noyer les renforts fibreux (2.1) dans ladite résine (5) pour former un composite à matrice organique, et  - depositing a liquid thermoplastic resin (5) on the upper surface of the metal sheet so as to embed the fibrous reinforcements (2.1) in said resin (5) to form a composite with an organic matrix, and
- chauffer le composite jusqu'à une température prédéterminée pour polymériser la résine (5) sous l'effet d'un catalyseur avant d'exercer une pression sur le composite en direction de la feuille métallique (1.1) pour adhérer ledit composite à ladite feuille métallique (1.1).  - heating the composite to a predetermined temperature to polymerize the resin (5) under the effect of a catalyst before exerting pressure on the composite in the direction of the metal sheet (1.1) to adhere said composite to said sheet metallic (1.1).
2. Procédé selon la revendication 1, dans lequel la surface supérieure de la feuille métallique (1.1) a préalablement subi une opération de préparation de surface (P) permettant d'améliorer l'adhérence entre la résine (5) et la surface supérieure de la feuille métallique (1.1).  2. Method according to claim 1, in which the upper surface of the metal sheet (1.1) has previously undergone a surface preparation operation (P) making it possible to improve the adhesion between the resin (5) and the upper surface of the metal sheet (1.1).
3. Procédé selon la revendication 1, dans lequel la résine (5) recouvre totalement la surface supérieure de la feuille métallique (1.1) .  3. Method according to claim 1, wherein the resin (5) completely covers the upper surface of the metal sheet (1.1).
4. Procédé selon la revendication 1, dans lequel la résine (5) recouvre partiellement la surface supérieure de la feuille métallique (1.1) .  4. The method of claim 1, wherein the resin (5) partially covers the upper surface of the metal sheet (1.1).
5. Procédé selon la revendication 4, dans lequel la résine (5) recouvre partiellement la surface supérieure de la feuille métallique (1.1) dans le sens de la longueur de ladite feuille . 5. Method according to claim 4, wherein the resin (5) partially covers the upper surface of the metal sheet (1.1) in the direction of the length of said sheet.
6. Procédé selon la revendication 1, dans lequel la feuille métallique (1.1) est issue d'une bande déroulée depuis une bobine (1).  6. The method of claim 1, wherein the metal sheet (1.1) is from a strip unwound from a reel (1).
7. Procédé selon l'une quelconque des revendications précédentes, dans lequel les renforts fibreux (2.1) comportent des fibres de carbone et/ou des fibres de verre.  7. Method according to any one of the preceding claims, in which the fibrous reinforcements (2.1) comprise carbon fibers and / or glass fibers.
8. Procédé selon l'une quelconque des revendications précédentes, dans lequel les renforts fibreux (2.1) sont issus d'un rouleau de distribution (2) de fibres de verre et/ou de fibres de carbone ou d' aramide .  8. Method according to any one of the preceding claims, in which the fibrous reinforcements (2.1) come from a distribution roller (2) of glass fibers and / or carbon fibers or aramid.
9. Procédé d'obtention d'une pièce structurelle dans un matériau métallique renforcé issu du procédé de fabrication selon l'une quelconque des revendications précédentes, le procédé comportant les étapes supplémentaires de :  9. Method for obtaining a structural part in a reinforced metallic material resulting from the manufacturing process according to any one of the preceding claims, the process comprising the additional steps of:
- découper une portion (10) de matériau métallique renforcé à des dimensions prédéfinies correspondant sensiblement à celles de la pièce structurelle (11) ,  - cutting a portion (10) of reinforced metallic material to predefined dimensions substantially corresponding to those of the structural part (11),
- chauffer la portion (10) découpée jusqu'à une température prédéterminée, puis  - heat the portion (10) cut to a predetermined temperature, then
- estamper la portion chauffée pour obtenir la forme de la pièce structurelle (11) .  - stamp the heated portion to obtain the shape of the structural part (11).
PCT/EP2019/068296 2018-07-17 2019-07-08 Method for producing a metal material reinforced with an organic matrix composite WO2020016044A1 (en)

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