EP2593295A1 - Method for manufacturing a composite material core for a connecting rod, and resulting connecting rod core - Google Patents

Method for manufacturing a composite material core for a connecting rod, and resulting connecting rod core

Info

Publication number
EP2593295A1
EP2593295A1 EP11743308.6A EP11743308A EP2593295A1 EP 2593295 A1 EP2593295 A1 EP 2593295A1 EP 11743308 A EP11743308 A EP 11743308A EP 2593295 A1 EP2593295 A1 EP 2593295A1
Authority
EP
European Patent Office
Prior art keywords
bars
composite material
manufacturing
foam
connecting rod
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP11743308.6A
Other languages
German (de)
French (fr)
Inventor
Maxime Castel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexeya Systems SAS
Original Assignee
Nexeya Systems SAS
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 Nexeya Systems SAS filed Critical Nexeya Systems SAS
Publication of EP2593295A1 publication Critical patent/EP2593295A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C70/32—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 on a rotating mould, former or core
    • 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
    • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0003—Producing profiled members, e.g. beams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • F16C7/026—Constructions of connecting-rods with constant length made of fibre reinforced resin
    • 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
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • 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
    • B29C70/462—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
    • 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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/545—Perforating, cutting or machining during or after moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • B29K2105/243—Partially cured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2707/00—Use of elements other than metals for preformed parts, e.g. for inserts
    • B29K2707/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/001—Profiled members, e.g. beams, sections
    • B29L2031/003—Profiled members, e.g. beams, sections having a profiled transverse cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/75—Shafts

Definitions

  • the present invention relates to a method of manufacturing a connecting rod core of composite material, and the rod core obtained.
  • rods made of composite materials are already known, they generally comprise a core interposed between elements comprising an eyelet allowing an articulated connection.
  • the subjection of these elements can be achieved in different ways, either by screwing as in the document FR 2 895 041, by locking by force insertion inside a strap as in DE 103 25 190, or else by maintaining in a winding as in WO 2009/138660.
  • the object of the present invention is to propose a method of manufacturing a connecting rod core of composite material, making it possible to meet the specifications with regard to the strength of the rod obtained, while considerably reducing the weight of the rod.
  • the method of manufacturing a rod core of composite material according to the invention consists in carrying out the following steps:
  • thermosetting or thermoplastic matrix in making selected dimensions, three bars of composite material, comprising reinforcing fibers embedded in a thermosetting or thermoplastic matrix
  • the bars of composite material are made by draping folds of pre-impregnated carbon fabric, then polymerization by pressure cooking.
  • the plies of preimpregnated carbon fabric are oriented so that the reinforcing fibers are parallel or substantially parallel to the axis of the bar, which is intended to be parallel to the axis principal of the soul which is also that of the connecting rod.
  • the length and or the width of the bars is ground by a machining operation.
  • the foam bars are manufactured by machining operations of foam blocks.
  • the assembly of the bars together is performed by cold gluing under pressure.
  • the lacing consists of winding one or more reinforcing threads by rotating around the composite block, while making a displacement in the axial direction.
  • the present invention also relates to a rod core of composite material that can be obtained by the method as defined above.
  • a rod core is characterized by its structure, of H-shaped cross-section, consisting of two bars of composite material between which is inserted a bar of composite material, and supplemented by foam bars and an outer shell made of a lacing with reinforcing threads.
  • FIG. 1 shows a schematic sectional view of a step of the manufacturing method of a rod core of composite material.
  • FIGS. 2a and 2b show diagrammatic perspective and exploded views of two other steps of the same process.
  • FIG. 3 shows a schematic sectional view of another step of the same process.
  • FIG. 4 represents a schematic cross-sectional view of the product obtained after the phase of the process illustrated in FIG. 3.
  • FIG. 5 represents a schematic perspective view of a next step of the method according to the invention.
  • FIG. 6 shows a schematic cross-sectional view of a rod core obtained by the same method.
  • a mold device 1 equipped with a piston 10, intended to allow the manufacture of rods of composite material, consisting of a superposition of folds 2 of reinforcing fiber fabric, the carbon, pre-impregnated with resin, not limited to phenolic or epoxy for example.
  • the folds 2 are arranged so that the fibers are preferably oriented in a direction parallel or substantially parallel to the longitudinal axis of the bar to be manufactured, which corresponds to the longitudinal axis of the connecting rod to be manufactured.
  • the polymerization of the fold arrangement 2 is carried out by a cooking operation under a pressure P exerted by the piston 10.
  • This first step of the method according to the invention makes it possible to manufacture bars of composite material having a straight parallelepipedal shape, three of which are represented in FIG. 2a, namely two identical bars 3, and a bar 4 of the same length as the bars 3, but without limitation, of different width and thickness.
  • the bars 3 and 4 are calibrated by a machining operation.
  • the bars 3 and 4 are intended to be assembled, the two bars 3 being positioned parallel to each other, while the bar 4 is interposed therebetween, so as to form a structure 5 of cross section in form of H, as can be seen in Figure 2b.
  • the method according to the invention comprises a phase of manufacture of bars 6 made of foam, obtained by machining a block of foam, to give them selected dimensions, namely an equal length to that of the bars 3 and 4, and transverse dimensions corresponding to those of each of the spaces 50 formed in the structure 5, between the bars 3 and 4.
  • the material used consists, preferably but not exclusively, of a closed-cell rigid polyurethane foam.
  • Each of the foam bars 6 is intended to be placed in a space 50.
  • the assembly of the bars 3, 4 and 6 is associated with a bonding operation by means of a polymerizing glue at ambient temperature under pressure, for example, without limitation, a bicomponent structural epoxy adhesive.
  • Bonding is therefore performed cold in a tool identical to that used for the manufacture of bars 3 and 4, namely a mold 1 and a piston 10 as shown in FIG.
  • the mixture is demolded and a block 7, as shown in FIG. 4, of rectangular parallelepipedal shape is obtained, internally comprising the H-shaped cross-section structure 5 consisting of the bars 4 and 3, completed by the bars of FIG. foam 6.
  • the method of manufacturing a connecting rod core according to the invention continues with a lacing operation, illustrated in FIG.
  • This lacing operation consists of wrapping around the block 7, reinforcement wires, carbon for example, all along this block 7.
  • a machine 8 which comprises on the one hand a mandrel 80 to which the block 7 is secured by one of its ends, and on the other hand a coil 81 of wires 82, associated with guide means. 83.
  • the block 7 After winding, is applied to the block 7 lace a resin, and put under pressure, in a tool 1 for example. After polymerization, the length of the block is adjusted by machining, in order to obtain a core 9 of a connecting rod, as shown in FIG. 6, namely comprising a section structure 5 transverse H-shaped, consisting of bars 4 and 3, supplemented by the foam bars 6, and an outer casing 90 made of lacing reinforcing son.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The invention relates to a method for manufacturing a composite material core. Said method comprises carrying out the following steps: manufacturing three composite material bars (3, 4) having selected sizes and including reinforcing fibers embedded in a thermosetting matrix or thermoplastic matrix; manufacturing two foam bars (6) having selected sizes; assembling and adhering the bars together such that the three composite material bars (3, 4) form a structure (5) having an H-shaped cross-section, and such that the foam bars (6) are inserted into the spaces defined by the composite material bars (3, 4) so as to obtain a composite block; tying up the composite block by winding reinforcing wires (82); and then coating same with resin and pressurizing same until it is polymerized.

Description

^  ^
PROCEDE DE FABRICATION D'UNE AME DE BIELLE EN MATERIAU COMPOSITE, ET AME DE BIELLE OBTENUE METHOD FOR MANUFACTURING A CORK ROD IN A COMPOSITE MATERIAL, AND A BODY CORME OBTAINED
La présente invention a pour objet un procédé de fabrication d'une âme de bielle en matériau composite, ainsi que 1 ' âme de bielle obtenue . The present invention relates to a method of manufacturing a connecting rod core of composite material, and the rod core obtained.
L'utilisation de matériaux composites pour la fabrication de bielle est essentiellement dictée par le besoin d'un gain de poids, en sorte qu'elle intéresse particulièrement l'industrie aéronautique.  The use of composite materials for the manufacture of connecting rods is essentially dictated by the need for weight gain, so that it is of particular interest to the aeronautical industry.
On connaît déjà beaucoup de bielles réalisées en matériaux composites, elles comportent de manière générale une âme interposée entre des éléments comprenant un oeilleton permettant une liaison articulée. L'assujettissement de ces éléments peut être réalisé de différentes manières, que ce soit par vissage comme dans le document FR 2 895 041, par blocage par insertion en force à l'intérieur d'une sangle comme dans le document DE 103 25 190, ou bien encore par maintien dans un enroulement comme dans le document WO 2009/138660.  Many rods made of composite materials are already known, they generally comprise a core interposed between elements comprising an eyelet allowing an articulated connection. The subjection of these elements can be achieved in different ways, either by screwing as in the document FR 2 895 041, by locking by force insertion inside a strap as in DE 103 25 190, or else by maintaining in a winding as in WO 2009/138660.
II a été constaté que, pour la plupart, les bielles existantes présentent une résistance bien supérieure à celle requise par le cahier des charges. Cette résistance résulte principalement de la conception de l'âme, laquelle constitue également la partie la plus lourde de la bielle .  It has been found that, for the most part, the existing connecting rods have a much higher resistance than that required by the specifications. This resistance results mainly from the design of the soul, which is also the heaviest part of the connecting rod.
On connaît également, par les documents de brevet Also known by patent documents
US 2008/0210137 et GB 2 246 111, différents procédés de fabrication d' un élément réalisé en un matériau composite . Cependant, de tels procédés ne sont pas adaptés à la fabrication d'une âme de bielle. De plus, lesdits procédés ne permettent pas l'obtention d'un élément structurel résistant à des contraintes mécaniques élevées . US 2008/0210137 and GB 2,246,111, various methods of manufacturing an element made of a composite material. However, such methods are not suitable for the manufacture of a connecting rod core. In addition, said methods do not make it possible to obtain a structural element resistant to high mechanical stresses.
La présente invention a pour but de proposer un procédé de fabrication d'une âme de bielle en matériau composite, permettant de répondre au cahier des charges en ce qui concerne la résistance de la bielle obtenue, tout en réduisant considérablement le poids de cette dernière . Le procédé de fabrication d'une âme de bielle en matériau composite selon l'invention consiste à réaliser les étapes suivantes : The object of the present invention is to propose a method of manufacturing a connecting rod core of composite material, making it possible to meet the specifications with regard to the strength of the rod obtained, while considerably reducing the weight of the rod. The method of manufacturing a rod core of composite material according to the invention consists in carrying out the following steps:
- fabriquer en des dimensions choisies trois barreaux de matériau composite, comprenant des fibres de renforts noyées dans une matrice thermodurcissable ou thermoplastique,  in making selected dimensions, three bars of composite material, comprising reinforcing fibers embedded in a thermosetting or thermoplastic matrix,
- fabriquer en des dimensions choisies , deux barreaux en mousse ,  - manufacture in selected dimensions, two foam bars,
- assembler et coller lesdits barreaux de manière que les trois barreaux de matériau composite forment une structure de section transversale en H, et que lesdits barreaux en mousse s'insèrent dans les espaces délimités par lesdits barreaux de matériau composite, en sorte d'obtenir un bloc composite,  - Assembling and bonding said bars so that the three bars of composite material form a H-shaped cross-section structure, and that said foam bars fit into the spaces delimited by said bars of composite material, so as to obtain a composite block,
- lacer ledit bloc composite par enroulement de fils de renfort, puis enduire de résine et mettre sous pression jusqu'à polymérisation .  - Lacer said composite block by winding reinforcing son, then coat with resin and pressurized until polymerization.
Selon une caractéristique additionnelle du procédé selon l'invention, les barreaux de matériau composite sont réalisés par drapage de plis de tissu carbone pré imprégné, puis polymérisation par cuisson sous pression .  According to an additional characteristic of the method according to the invention, the bars of composite material are made by draping folds of pre-impregnated carbon fabric, then polymerization by pressure cooking.
Selon une autre caractéristique additionnelle du procédé selon l'invention, les plis de tissu carbone pré imprégné sont orientés en sorte que les fibres de renfort soient parallèles ou sensiblement parallèles à l'axe du barreau, lequel est destiné à être parallèle à 1 ' axe principal de 1 ' âme qui est aussi celui de la bielle .  According to another additional characteristic of the process according to the invention, the plies of preimpregnated carbon fabric are oriented so that the reinforcing fibers are parallel or substantially parallel to the axis of the bar, which is intended to be parallel to the axis principal of the soul which is also that of the connecting rod.
Selon une autre caractéristique additionnelle du procédé selon l'invention, après leur fabrication, la longueur et ou la largeur des barreaux est rectifiée par une opération d'usinage.  According to another additional characteristic of the method according to the invention, after their manufacture, the length and or the width of the bars is ground by a machining operation.
Selon une autre caractéristique additionnelle du procédé selon l'invention, les barreaux de mousse sont fabriqués par des opérations d'usinage de blocs de mousse.  According to another additional feature of the method according to the invention, the foam bars are manufactured by machining operations of foam blocks.
Selon une autre caractéristique additionnelle du procédé selon l'invention, l'assemblage des barreaux entre eux est réalisé par collage à froid sous pression. Selon une autre caractéristique additionnelle du procédé selon l'invention, le laçage consiste à enrouler un ou plusieurs fils de renfort en tournant autour du bloc composite, tout en réalisant un déplacement dans le sens axial . According to another additional feature of the method according to the invention, the assembly of the bars together is performed by cold gluing under pressure. According to another additional feature of the method according to the invention, the lacing consists of winding one or more reinforcing threads by rotating around the composite block, while making a displacement in the axial direction.
La présente invention a également pour objet une âme de bielle en matériau composite susceptible d'être obtenue par le procédé tel que défini précédemment. Une telle âme de bielle est caractérisée par sa structure, de section transversale en forme de H, constituée de deux barreaux en matériau composite entre lesquels est intercalé un barreau en matériau composite, et complétée par des barreaux de mousse et une enveloppe externe faite d'un laçage en fils de renfort.  The present invention also relates to a rod core of composite material that can be obtained by the method as defined above. Such a rod core is characterized by its structure, of H-shaped cross-section, consisting of two bars of composite material between which is inserted a bar of composite material, and supplemented by foam bars and an outer shell made of a lacing with reinforcing threads.
Les avantages et les caractéristiques du procédé selon l'invention, ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif.  The advantages and characteristics of the method according to the invention will become more clearly apparent from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.
Dans le dessin annexé :  In the attached drawing:
- la figure 1 représente une vue schématique en coupe d'une étape du procédé de fabrication d'une âme de bielle en matériau composite .  - Figure 1 shows a schematic sectional view of a step of the manufacturing method of a rod core of composite material.
- les figures 2a et 2b représentent des vues schématiques en perspective en et en éclaté de deux autres étapes du même procédé .  FIGS. 2a and 2b show diagrammatic perspective and exploded views of two other steps of the same process.
- la figure 3 représente une vue schématique en coupe d'une autre étape du même procédé.  - Figure 3 shows a schematic sectional view of another step of the same process.
- la figure 4 représente une vue schématique en coupe transversale du produit obtenu après la phase du procédé illustrée sur la figure 3.  FIG. 4 represents a schematic cross-sectional view of the product obtained after the phase of the process illustrated in FIG. 3.
la figure 5 représente une vue schématique en perspective d'une étape suivante du procédé selon l'invention.  FIG. 5 represents a schematic perspective view of a next step of the method according to the invention.
- la figure 6 représente une vue schématique en coupe transversale d'une âme de bielle obtenue par le même procédé.  - Figure 6 shows a schematic cross-sectional view of a rod core obtained by the same method.
En référence à la figure 1, on peut voir un dispositif de moule 1 équipé d'un piston 10, destiné à permettre la fabrication de barreaux en matériau composite, constitués d'une superposition de plis 2 de tissu de fibres de renfort, du carbone, pré-imprégnés de résine, non limitativement phénolique ou époxy par exemple . Referring to Figure 1, there can be seen a mold device 1 equipped with a piston 10, intended to allow the manufacture of rods of composite material, consisting of a superposition of folds 2 of reinforcing fiber fabric, the carbon, pre-impregnated with resin, not limited to phenolic or epoxy for example.
Les plis 2 sont arrangés, en sorte que les fibres soient orientées préférentiellement dans une direction parallèle ou sensiblement parallèle à 1 ' axe longitudinal du barreau à fabriquer, lequel correspond à l'axe longitudinal de la bielle à fabriquer.  The folds 2 are arranged so that the fibers are preferably oriented in a direction parallel or substantially parallel to the longitudinal axis of the bar to be manufactured, which corresponds to the longitudinal axis of the connecting rod to be manufactured.
Après arrangement des plis 2 dans la cavité 11 du moule 1 , on réalise la polymérisation de 1 ' arrangement de plis 2 par une opération de cuisson sous une pression P exercée par le piston 10.  After arrangement of the folds 2 in the cavity 11 of the mold 1, the polymerization of the fold arrangement 2 is carried out by a cooking operation under a pressure P exerted by the piston 10.
Cette première étape du procédé selon l'invention permet de fabriquer des barreaux de matériau composite de forme parailélépipédique rectangle dont trois sont représentés sur la figure 2a, à savoir deux barreaux 3 identiques, et un barreau 4 de même longueur que les barreaux 3 mais, non limitativement, de largeur et d'épaisseur différentes.  This first step of the method according to the invention makes it possible to manufacture bars of composite material having a straight parallelepipedal shape, three of which are represented in FIG. 2a, namely two identical bars 3, and a bar 4 of the same length as the bars 3, but without limitation, of different width and thickness.
Après démoulage, les barreaux 3 et 4 sont calibrés par une opération d'usinage.  After demolding, the bars 3 and 4 are calibrated by a machining operation.
Les barreaux 3 et 4 sont destinés à être assemblés, les deux barreaux 3 étant positionnés parallèlement l'un à l'autre, tandis que le barreau 4 est intercalé entre ceux-ci, en sorte de former une structure 5 de section transversale en forme de H, comme cela est visible sur la figure 2b.  The bars 3 and 4 are intended to be assembled, the two bars 3 being positioned parallel to each other, while the bar 4 is interposed therebetween, so as to form a structure 5 of cross section in form of H, as can be seen in Figure 2b.
Parallèlement à la fabrication des barreaux 3 et 4 , le procédé selon l'invention comprend une phase de fabrication de barreaux 6 en mousse, obtenus par usinage d'un bloc de mousse, afin de leur donner des dimensions choisies, à savoir une longueur égale à celle des barreaux 3 et 4 , et des dimensions transversales correspondant à celles de chacun des espaces 50 ménagés dans la structure 5 , entre les barreaux 3 et 4.  In parallel with the manufacture of the bars 3 and 4, the method according to the invention comprises a phase of manufacture of bars 6 made of foam, obtained by machining a block of foam, to give them selected dimensions, namely an equal length to that of the bars 3 and 4, and transverse dimensions corresponding to those of each of the spaces 50 formed in the structure 5, between the bars 3 and 4.
Le matériau utilisé consiste, de préférence mais non limitativement, en une mousse polyuréthane rigide à cellules fermées .  The material used consists, preferably but not exclusively, of a closed-cell rigid polyurethane foam.
Chacun des barreaux en mousse 6 est destiné à être placé dans un espace 50. L'assemblage des barreaux 3, 4 et 6 est associé à une opération de collage au moyen d'une colle polymérisante à la température ambiante sous pression, par exemple, non limitativement, une colle epoxy structurale bi- composants . Each of the foam bars 6 is intended to be placed in a space 50. The assembly of the bars 3, 4 and 6 is associated with a bonding operation by means of a polymerizing glue at ambient temperature under pressure, for example, without limitation, a bicomponent structural epoxy adhesive.
Le collage est donc effectué à froid dans un outillage identique à celui utilisé pour la fabrication des barreaux 3 et 4, à savoir un moule 1 et un piston 10 comme cela est représenté sur la figure 3.  Bonding is therefore performed cold in a tool identical to that used for the manufacture of bars 3 and 4, namely a mold 1 and a piston 10 as shown in FIG.
Ainsi, on place dans la cavité 11 du moule 1, un barreau 3, puis les deux barreaux en mousse 6 et le barreau 4, puis le second barreau 3, et enfin on ferme la cavité 11 au moyen du piston 10, et on exerce une pression P' .  Thus, one places in the cavity 11 of the mold 1, a bar 3, then the two foam bars 6 and the bar 4, then the second bar 3, and finally the cavity 11 is closed by means of the piston 10, and a pressure P '.
Après polymérisation, on démoule et on obtient un bloc 7, tel que représenté sur la figure 4 , de forme parallélépipédique rectangle, comprenant intérieurement la structure 5 de section transversale en forme de H, constituée des barreaux 4 et 3, complétée par les barreaux de mousse 6.  After polymerization, the mixture is demolded and a block 7, as shown in FIG. 4, of rectangular parallelepipedal shape is obtained, internally comprising the H-shaped cross-section structure 5 consisting of the bars 4 and 3, completed by the bars of FIG. foam 6.
Le procédé de fabrication d'une âme de bielle selon l'invention se poursuit par une opération de laçage, illustrée à la figure 5.  The method of manufacturing a connecting rod core according to the invention continues with a lacing operation, illustrated in FIG.
Cette opération de laçage consiste à enrouler autour du bloc 7, des fils de renfort, du carbone par exemple, tout le long de ce bloc 7.  This lacing operation consists of wrapping around the block 7, reinforcement wires, carbon for example, all along this block 7.
En 1 ' occurrence on utilise une machine 8 qui comporte d'une part un mandrin 80 auquel le bloc 7 est assujetti par l'une de ses extrémités, et d'autre part une bobine 81 de fils 82 , associée à des moyens de guidage 83.  In this case, a machine 8 is used which comprises on the one hand a mandrel 80 to which the block 7 is secured by one of its ends, and on the other hand a coil 81 of wires 82, associated with guide means. 83.
En associant la rotation du bloc 7 autour de son axe longitudinal, avec son déplacement relatif par rapport aux moyens de guidage 83 selon le même axe, on obtient l'enroulement des fils 82.  By associating the rotation of the block 7 about its longitudinal axis, with its relative displacement with respect to the guide means 83 along the same axis, the winding of the wires 82 is obtained.
Après enroulement, on applique sur le bloc 7 lacé une résine, et on met sous pression, dans un outil 1 par exemple. Après polymérisation on ajuste la longueur du bloc par usinage, afin d'obtenir une âme 9 de bielle, telle que représentée sur la figure 6, à savoir comprenant une structure 5 de section transversale en forme de H, constituée des barreaux 4 et 3, complétée par les barreaux de mousse 6, et une enveloppe externe 90 faite d'un laçage en fils de renfort. After winding, is applied to the block 7 lace a resin, and put under pressure, in a tool 1 for example. After polymerization, the length of the block is adjusted by machining, in order to obtain a core 9 of a connecting rod, as shown in FIG. 6, namely comprising a section structure 5 transverse H-shaped, consisting of bars 4 and 3, supplemented by the foam bars 6, and an outer casing 90 made of lacing reinforcing son.

Claims

REVENDICATIONS
1) Procédé de fabrication d'une âme (9) de bielle en matériau composite, consistant à réaliser les étapes suivantes : 1) A method of manufacturing a core (9) of a connecting rod made of composite material, comprising the steps of:
- fabriquer en des dimensions choisies trois barreaux (3, 4) de matériau composite, comprenant des fibres de renforts noyées dans une matrice thermodurcissable ou thermoplastique,  in making selected dimensions, three bars (3, 4) of composite material, comprising reinforcing fibers embedded in a thermosetting or thermoplastic matrix,
- fabriquer en des dimensions choisies, deux barreaux (6) en mousse,  - manufacture in selected dimensions, two bars (6) foam,
- assembler et coller lesdits barreaux de manière que les trois barreaux (3, 4) de matériau composite forment une structure (5) de section transversale en H, et que lesdits barreaux en mousse (6) s'insèrent dans les espaces (50) délimités par lesdits barreaux (3, 4) de matériau composite, en sorte d'obtenir un bloc composite (7) ,  - assembling and bonding said bars so that the three bars (3, 4) of composite material form a structure (5) of H-shaped cross-section, and that said foam bars (6) fit into the spaces (50) delimited by said bars (3, 4) of composite material, so as to obtain a composite block (7),
- lacer ledit bloc composite (7) par enroulement de fils de renfort (82) , puis enduire de résine et mettre sous pression jusqu'à polymérisation.  - Lacer said composite block (7) by winding reinforcing son (82), then coat with resin and pressurized until polymerization.
2) Procédé de fabrication selon la revendication 1, caractérisé en ce que les barreaux (3, 4) de matériau composite sont réalisés par drapage de plis de tissu carbone pré imprégné, puis polymérisation par cuisson sous pression.  2) A manufacturing method according to claim 1, characterized in that the bars (3, 4) of composite material are made by draping folds of pre-impregnated carbon fabric, and then polymerization by pressure cooking.
3) Procédé de fabrication selon la revendication 2, caractérisé en ce que les plis de tissu carbone pré imprégné sont orientés en sorte que les fibres de renfort soient parallèles ou sensiblement parallèles à l'axe du barreau (3, 4), lequel est destiné à être parallèle à 1 ' axe principal de 1 ' âme (9) .  3) A manufacturing method according to claim 2, characterized in that the plies of pre-impregnated carbon fabric are oriented so that the reinforcing fibers are parallel or substantially parallel to the axis of the bar (3, 4), which is intended to be parallel to the main axis of the soul (9).
4) Procédé de fabrication selon l'une quelconque des revendications 1 à 3, caractérisé en ce que après leur fabrication, la longueur et/ou la largeur des barreaux (3, 4) est rectifiée par une opération d'usinage.  4) Manufacturing process according to any one of claims 1 to 3, characterized in that after manufacture, the length and / or the width of the bars (3, 4) is ground by a machining operation.
5) Procédé de fabrication selon l'une quelconque des revendications 1 à 4 , caractérisé en ce que les barreaux de mousse (6) sont fabriqués par des opérations d'usinage de blocs de mousse . 6) Procédé de fabrication selon l'une quelconque des revendications 1 à 5 , caractérisé en ce que 1 ' assemblage des barreaux (3, 4, 6) entre eux est réalisé par collage à froid sous pression. 5) A manufacturing method according to any one of claims 1 to 4, characterized in that the foam bars (6) are manufactured by foam block machining operations. 6) A manufacturing method according to any one of claims 1 to 5, characterized in that 1 'assembly of the bars (3, 4, 6) between them is made by cold gluing under pressure.
7) Procédé de fabrication selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le laçage consiste à enrouler un ou plusieurs fils de renfort (82) en tournant autour du bloc composite (7) , tout en réalisant un déplacement relatif dans le sens axial .  7) A manufacturing method according to any one of claims 1 to 6, characterized in that the lacing consists of winding one or more reinforcing son (82) by rotating around the composite block (7), while making a relative displacement in the axial direction.
8) Ame (9) de bielle en matériau composite, susceptible d'être obtenue par le procédé de fabrication selon l'une quelconque des revendications 1 à 7 , caractérisée en ce que ladite âme (9) de bielle comprend une structure (5) , de section transversale en forme de H, constituée de deux barreaux (3) en matériau composite entre lesquels est intercalé un barreau (4) en matériau composite, et complétée par des barreaux de mousse (6) et une enveloppe externe (90) faite d'un laçage en fils de renfort.  8) Connecting rod (9) of composite material, obtainable by the manufacturing method according to any one of claims 1 to 7, characterized in that said core (9) of rod comprises a structure (5) , of H-shaped cross section, consisting of two bars (3) of composite material between which is inserted a bar (4) of composite material, and supplemented by foam bars (6) and an outer casing (90) made lacing with reinforcing threads.
EP11743308.6A 2010-07-13 2011-07-07 Method for manufacturing a composite material core for a connecting rod, and resulting connecting rod core Withdrawn EP2593295A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1055692A FR2962679B1 (en) 2010-07-13 2010-07-13 METHOD FOR MANUFACTURING A CORK ROD IN A COMPOSITE MATERIAL, AND A BODY CORME OBTAINED
PCT/FR2011/051615 WO2012007674A1 (en) 2010-07-13 2011-07-07 Method for manufacturing a composite material core for a connecting rod, and resulting connecting rod core

Publications (1)

Publication Number Publication Date
EP2593295A1 true EP2593295A1 (en) 2013-05-22

Family

ID=43638840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11743308.6A Withdrawn EP2593295A1 (en) 2010-07-13 2011-07-07 Method for manufacturing a composite material core for a connecting rod, and resulting connecting rod core

Country Status (3)

Country Link
EP (1) EP2593295A1 (en)
FR (1) FR2962679B1 (en)
WO (1) WO2012007674A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014217756B4 (en) * 2014-09-05 2023-01-26 Bayerische Motoren Werke Aktiengesellschaft Process for manufacturing a fiber-reinforced plastic part and fiber-reinforced plastic part
CN109795130B (en) * 2019-03-10 2024-06-04 西安爱生技术集团公司 Forming tool for equal-diameter tubular member made of carbon fiber composite material with large length-diameter ratio

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246111B (en) * 1990-07-13 1994-05-04 Samsung Heavy Ind Dipper stick for excavator of high strength polymeric composite materials and method for manufacturing such
DE10325190A1 (en) 2003-06-04 2004-12-23 Daimlerchrysler Ag Connecting link for use as connecting rod, has holding component that holds sockets and intermediate component together under high compression stress
FR2895041B1 (en) 2005-12-15 2009-07-10 Skf Aerospace France Soc Par A TUBE ROD IN COMPOSITE MATERIAL AND METHOD FOR MANUFACTURING SUCH ROD
US20080210137A1 (en) * 2007-03-03 2008-09-04 Steven Jon Cox Surfboard Stringer Reinforcing system
FR2930611B3 (en) * 2008-04-23 2010-09-10 Conseil Et Tech BIELLE REALIZED IN COMPOSITE MATERIAL, AND METHOD FOR PRODUCING A ROD IN COMPOSITE MATERIAL

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012007674A1 *

Also Published As

Publication number Publication date
FR2962679B1 (en) 2014-03-07
FR2962679A1 (en) 2012-01-20
WO2012007674A1 (en) 2012-01-19

Similar Documents

Publication Publication Date Title
EP0604297B1 (en) Composite thermoplastic blade, in particular for helicopter shrouded tail rotor, and its manufacturing procedure with injection stop
EP2550153B1 (en) Method for the continuous production of a connecting part made from composite material
US7858011B2 (en) Method and apparatus for producing a rim
EP2407319B1 (en) Rim or rim portion made of a composite material
FR2699498A1 (en) A thermoplastic composite blade, particularly for a helicopter-mounted rear rotor, and its manufacturing process.
EP2922689B1 (en) Assembly of a metal insert and a sheet of composite material and part obtained by moulding such a sheet
FR2503024A1 (en) TUBULAR HOLLOW BODY, METHOD FOR PRODUCING THE SAME, AND DEVICE FOR CARRYING OUT SAID METHOD
EP3458767B1 (en) Vessel made of composite material for containing a pressurised fluid
EP0502796A1 (en) Spectacle frames of synthetic resin and method of manufacture
FR2491391A1 (en) PROCESS FOR PRODUCING FIBER REINFORCED ARTICLES
EP2433024B1 (en) Method for manufacturing a composite material connecting rod
WO2012007674A1 (en) Method for manufacturing a composite material core for a connecting rod, and resulting connecting rod core
EP1930146A1 (en) Spoke made from composite material for a spoke wheel
FR2776264A1 (en) Composite blade for variable-speed rear rotor of helicopter
EP2974854B1 (en) A method of fabricating a spar for a blade, and a method of fabricating a blade
FR2645070A3 (en) Composite-material structural elements having metal end fittings, and its method of manufacture
FR2942163A1 (en) PIECE OF COMPOSITE MATERIAL, ROD IN COMPOSITE MATERIAL AND METHOD OF MANUFACTURING THE SAME
FR3037891A1 (en) IMPROVED IMPACT ABSORPTION SYSTEM AND METHOD FOR MANUFACTURING THE SAME
EP3996901B1 (en) Method for reinforcing a panel and a method for manufacturing a composite panel implementing such a method and panel obtained thereby
FR2784622A1 (en) Composite spoke, for bicycle wheel formed from elongated bands of resin impregnated fibres which are folded one within the other and stuck together
EP2440394B1 (en) Method for manufacturing a rim armature using a composite material
EP2218566B1 (en) Method for manufacturing a composite part with a hollow monolithic structure by moulding under pressure
WO2013139714A2 (en) Method for producing a window frame from a composite material with a fibrous reinforcement and a window obtained by such a method
WO2023247865A1 (en) Fibrous reinforcement for the manufacture of a composite part intended to be articulated with other parts
WO2016005544A1 (en) Badminton racket and method for the production of a badminton racket

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20130213

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20131206

RIC1 Information provided on ipc code assigned before grant

Ipc: B29C 70/86 20060101ALI20131126BHEP

Ipc: B29C 70/46 20060101ALN20131126BHEP

Ipc: B29D 99/00 20100101ALI20131126BHEP

Ipc: B29C 70/32 20060101ALI20131126BHEP

Ipc: F16C 7/02 20060101ALI20131126BHEP

Ipc: B29C 70/54 20060101ALN20131126BHEP

Ipc: B29C 70/20 20060101ALN20131126BHEP

Ipc: B29C 70/38 20060101AFI20131126BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140417