FR2543054A1 - Process for manufacturing a connecting rod made from composite material for an engine, especially a motor-vehicle engine - Google Patents

Process for manufacturing a connecting rod made from composite material for an engine, especially a motor-vehicle engine Download PDF

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Publication number
FR2543054A1
FR2543054A1 FR8304632A FR8304632A FR2543054A1 FR 2543054 A1 FR2543054 A1 FR 2543054A1 FR 8304632 A FR8304632 A FR 8304632A FR 8304632 A FR8304632 A FR 8304632A FR 2543054 A1 FR2543054 A1 FR 2543054A1
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France
Prior art keywords
connecting rod
prepreg
insert
manufacturing
connecting rods
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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.)
Granted
Application number
FR8304632A
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French (fr)
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FR2543054B1 (en
Inventor
Marcel Goupy
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.)
Renault SAS
Regie Nationale des Usines Renault
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Renault SAS
Regie Nationale des Usines Renault
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Priority to FR8304632A priority Critical patent/FR2543054B1/en
Publication of FR2543054A1 publication Critical patent/FR2543054A1/en
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Publication of FR2543054B1 publication Critical patent/FR2543054B1/en
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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
    • B29C70/34—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
    • B29C70/347—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 combined with compressing after the winding of lay-ups having a non-circular cross-section, e.g. flat spiral windings
    • 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
    • B29C70/04—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
    • 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
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • 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
    • B29L2031/06—Rods, e.g. connecting rods, rails, stakes
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

Process for manufacturing connecting rods made from composite material. A preform is formed by winding preimpregnated filaments around spindles 32, 33 and around studs 34 to 39, which are removable and arranged on a bottom horizontal plate 31, and by introduction into the peripheral portion 30 thus obtained of an insert 40 cut out of a mat formed from superposed layers of preimpregnated materials, the studs 34 to 39 then being eclipsed, the said preform is compressed by means of two lateral elements 41, 42 so as to give the preform a shape close to that of the final connecting rod, next, the spindle 32, 33 are then eclipsed after moving the lateral elements 41, 42 apart and the preform is transferred and centred on two moveable spindles of the moulding tool, consisting of two horizontal platens which are heated and can be moved closer together, between which a plurality of lateral heater elements move, determining the final external profile of the connecting rod after pressing.

Description

PROCEDE DE FABRICATION D'UNE BIELLE EN MATERIAU COMPOSITE POUR
MOTEUR, NOTAMMENT DE VEHICULE AUTOMOBILE
La présente invention se rapporte à une bielle en matériau composite pour moteurs de véhicules de tourisme ou industriel.METHOD FOR MANUFACTURING A CONNECTING ROD IN COMPOSITE MATERIAL FOR
ENGINE, ESPECIALLY A MOTOR VEHICLE
The present invention relates to a connecting rod made of composite material for engines of passenger or industrial vehicles.

Les bielles sont généralement réalisées à partir de matériaux métalliques, tels qu'en alliages d'acier ou d'aluminium, coulés ou forgés puis usinés. On connatt l'intérêt d'alléger ces organes dans un moteur où l'inertie la plus faible est recherchée, en particulier, pour toutes les pièces utilisées en mouvement alternatif. La section des pièces est donc étudiée en conséquence mais les limites d'allègement résultent des caractéristiques des matériaux et de leur densité.The connecting rods are generally made from metallic materials, such as steel or aluminum alloys, cast or forged and then machined. We know the interest of lightening these organs in an engine where the lowest inertia is sought, in particular, for all the parts used in reciprocating motion. The section of the parts is therefore studied accordingly, but the limits of lightening result from the characteristics of the materials and their density.

La présente invention concerne la réalisation de bielles à l'aide de matériaux composites de faible densité et de caractéristiques mécaniques élevées, ces caractéristiques remarquables étant obtenues par le mode de disposition des fibres de renforcement impré- gnées de polymères. Ces fibres sont disposées de telle manière que le sens des contraintes principales de traction et de comme pression qui tendent à écarter ou à rapprocher les alésages de la bielle coincide avec le sens longitudinal des fibres ou s'en rapproche de très près.The present invention relates to the production of connecting rods using composite materials of low density and high mechanical characteristics, these remarkable characteristics being obtained by the arrangement of the reinforcing fibers impregnated with polymers. These fibers are arranged in such a way that the direction of the main tensile stresses and of pressure which tend to spread or bring the bores of the connecting rod closer to coincides with the longitudinal direction of the fibers or very close to them.

L'invention sera décrite à titre d'exemples non limitatifs au regard des figures 1 à 7 qui représentent respectivement - la figure 1 : une vue en plan de la bielle, selon l'invention
cette bielle est du type à deux alésages sans chapeau - la figure 2 : une coupe suivant l'axe longitudinal de la figure
1 - la figure 3 : une vue en plan du dispositif utilisé pour la
confection de l'ébauche de la bielle àmouler - la figure 4 : une vue en plan illustrant le mode de moulage - la figure 5 : une vue en plan de l'insert central en matériau
composite - la figure 6 :une vue en plan d'une variante de l'invention
représentant une bielle à chapeau - la figure 7 : une vue en plan de la disposition adoptée pour
réaliser la préforme de la figure 6.The invention will be described by way of nonlimiting examples with regard to FIGS. 1 to 7 which respectively represent - FIG. 1: a plan view of the connecting rod, according to the invention
this connecting rod is of the type with two bores without a cap - Figure 2: a section along the longitudinal axis of the figure
1 - Figure 3: a plan view of the device used for the
making the blank of the connecting rod to be molded - Figure 4: a plan view illustrating the molding method - Figure 5: a plan view of the central insert of material
composite - Figure 6: a plan view of a variant of the invention
representing a hat rod - Figure 7: a plan view of the arrangement adopted for
make the preform of figure 6.

La bielle, suivant la présente invention (figure 1), est essentiellement réalisée à partir d'une préforme constituée d'une partie périphérique 30 réalisée par bobinage et d'une partie centrale obtenue par découpe de couches de matériaux préimpré gués superposées. On voit qu'elle comporte un corps 1 aux extrémités duquel sont disposés deux alésages 2 et 3.The connecting rod, according to the present invention (Figure 1), is essentially made from a preform consisting of a peripheral part 30 produced by winding and a central part obtained by cutting layers of superimposed prepreg materials. We see that it has a body 1 at the ends of which are arranged two bores 2 and 3.

Pour réaliser le bobinage, on dispose d'une table tournante constituée par un plateau horizontal inférieur 37 (figure 3) équipée d'axes amovibles 32 et 33 correspondant aux alésages de la bielle à réaliser et de plots également amovibles tels que 34 à 39. Ces plots sont disposés de telle manière que la longueur développée à la périphérie de la bielle des points a à b, suivant la ligne pointillée figurant l'extérieur de bielle, soit égale à l'arc a d b. Il en est de même, pour l'autre côté qui est symétrique. Le bobinage peut alors être réalisé selon l'épaisseur désirée, à partir de filaments préimprégnés ou, de manière préférée, à partir d'un ruban préimprégné de largeur sensiblement équivalente à l'épaisseur de la pièce à mouler.To carry out the winding, there is a rotary table constituted by a lower horizontal plate 37 (FIG. 3) equipped with removable pins 32 and 33 corresponding to the bores of the connecting rod to be produced and also removable pads such as 34 to 39. These studs are arranged in such a way that the length developed at the periphery of the connecting rod from points a to b, along the dotted line appearing outside the connecting rod, is equal to the arc ad b. It is the same, for the other side which is symmetrical. The winding can then be produced according to the desired thickness, from prepreg filaments or, preferably, from a prepreg tape of width substantially equivalent to the thickness of the part to be molded.

Après l'opération de bobinage de la partie périphérique 30, on dispose sur la table tournante 1 un insert 40 découpé dans un matelas formé par des couches de matériaux pré imprégnés superposuées La découpe, à partir des matériaux mis à plat et comprimés, peut être effectuée par un emporte-pièces, comme utilisé dansl'industrie des élastomères.After the winding operation of the peripheral part 30, an insert 40 cut out of a mattress formed by layers of superimposed prepreg materials is placed on the rotary table 1. The cutting, from the materials laid flat and compressed, can be made by a cookie cutter, as used in the elastomer industry.

L'insert 40 étant mis en place, les plots 34 à 39 sont éclipsés.With the insert 40 in place, the studs 34 to 39 are eclipsed.

On rapporte alors sur le montage deux éléments latéraux 41 et 42 coulissant éventuellement dans des glissières 43 et 44, actionnes par exemple par des vérins non figurés. Ces éléments 41 - -42 permettent de comprimer l'ébauche afin de lui donner une forme voisine de la forme définitive. Selon nécessité, cette compression peut être accompagnée par la fermeture d'un plateau supérieur, non représenté, venant coiffer l'insert 40 qui peut éventuellement déborder légèrement du profil définitif à réaliser.There are then reported on the assembly two lateral elements 41 and 42 optionally sliding in slides 43 and 44, actuated for example by jacks not shown. These elements 41 - -42 make it possible to compress the blank in order to give it a shape close to the final shape. If necessary, this compression can be accompanied by the closing of an upper plate, not shown, which covers the insert 40 which may possibly slightly protrude from the final profile to be produced.

Les axes amovibles 32 et 33 sont alors éclipsés après écartement des moyens de mise en compression de la préforme et cette préforme est transférée sur l'outil de moulage.The removable pins 32 and 33 are then eclipsed after separation of the means for compressing the preform and this preform is transferred to the molding tool.

Au stade de la confection de la préforme, il est possible de prévoir la mise en place de bagues métalliques tels que 45, centrées sur l'axe amovible 33 et comportant à leur périphérie des moletages ou rainures destinées à former un ancrage lors de l'opéra- tion ultérieure de moulage, la bielle moulée pouvant alors être obtenue avec incorporation de coussinets métalliques.At the stage of making the preform, it is possible to provide for the installation of metal rings such as 45, centered on the removable axis 33 and having knurls or grooves at their periphery intended to form an anchorage during the subsequent molding operation, the molded rod can then be obtained with the incorporation of metal bearings.

L'opération de moulage nécessite un outil de préférence en quatre parties chauffantes latérales susceptibles de se déplacer entre deux plateaux horizontaux respectivement supérieur et inférieuranalogue à ceux évoqués au regard de la figure 3. La préforme est centrée sur deux axes 46 et 47 coulissant dans le plateau horizontal inférieur et assez longs pour se loger dans le plateau horizontal supérieur lors de sa fermeture. Les plateaux horizontaux sont également chauffés.The molding operation requires a tool preferably in four lateral heating parts capable of moving between two horizontal plates, respectively upper and lower analogous to those mentioned with regard to FIG. 3. The preform is centered on two axes 46 and 47 sliding in the lower horizontal tray and long enough to fit in the upper horizontal tray when it is closed. The horizontal plates are also heated.

Le moulage consiste alors à -fermer le plateau supérieur venant en butée à la cote d'épaisseur désirée, puis à fermer simultanément ou en séquence les blocs latéraux coulissants 48 et 49 puis 50 et Si (figure 4). The molding then consists in closing the upper plate coming into abutment at the desired thickness dimension, then in closing simultaneously or in sequence the sliding side blocks 48 and 49 then 50 and Si (FIG. 4).

La bielle ainsi moulée comporte une partie périphérique englobant les deux alésages 46 - 47 travaillant correctement en traction.The connecting rod thus molded has a peripheral part encompassing the two bores 46 - 47 working correctly in tension.

Les efforts de compression sont transmis principalement par la partie centrale où les fibres sont également situées dans le sens longitudinal et travaillent en compression "en bout".The compression forces are transmitted mainly by the central part where the fibers are also located in the longitudinal direction and work in compression "at the end".

Il est possible d'optimiser le sens de ces fibres, en réalisant la découpe à l'emporte-pièce dans un matelas constitué de couches successives de matériaux préimprégnés réalisés à partir de fils continus placés de manière symétrique, suivant les angles désirés comme représenté à titre d'exemple à la figure 5, afin de tenir compte de l'obliquité maximum de la bielle lors de son fonctionnement.It is possible to optimize the direction of these fibers, by cutting out with a cookie cutter in a mattress consisting of successive layers of prepreg materials made from continuous wires placed symmetrically, at the desired angles as shown in as an example in FIG. 5, in order to take account of the maximum obliquity of the connecting rod during its operation.

Les matériaux préimprégnés utilisés au cours des opérations précédemment décrites peuvent être constitués de diverses résines thermodurcissables, tels que epoxy, phénoliques, polyimides, polystyrylpyridine, polyesters, imprégnant des nappes de fils continus et parallèles en carbone, verre ou Kevlar.The prepreg materials used during the operations described above can consist of various thermosetting resins, such as epoxy, phenolics, polyimides, polystyrylpyridine, polyesters, impregnating sheets of continuous and parallel threads of carbon, glass or Kevlar.

Ces matériaux préimprégnés peuvent également être constitués par des nappes de fils continus parallèles, placées au sein de fils coupés préimprégnés en feuilles, désignés de manière connue sous l'appellation "Sheet Molding Compound" ou SMC. These prepreg materials can also be formed by sheets of parallel continuous threads, placed within cut threads prepreg in sheets, designated in a manner known by the name "Sheet Molding Compound" or SMC.

Selon la variante des figures 6 et 7, l'invention donne lieu à une variante permettant de réaliser une bielle de type à "chapeau". According to the variant of FIGS. 6 and 7, the invention gives rise to a variant making it possible to produce a "cap" type connecting rod.

Une telle bielle est constituée d'un corps 60, d'un alésage supérieur 61 et d'un alésage inférieur 62, inscrit pour partie dans la tête de bielle 68 et pour partie dans un chapeau de bielle 63, qui lui est solidarisé par des boulons introduits dans les per çages 64 à 67 correspondants.Such a connecting rod consists of a body 60, an upper bore 61 and a lower bore 62, partly inscribed in the connecting rod head 68 and partly in a connecting rod cap 63, which is secured to it by bolts inserted in the corresponding holes 64 to 67.

Comme on le voit à la figure 7, la préforme est réalisée en pla çant autour du noyau 81 et en début d'opération de part et d'autre de ce dernier qui comporte des ailettes 79 - 80 des renforts d'épaisseur, tels que 70 et 71, constitués par des éléments de dimensions adaptées, découpés dans un matelas de couches successives de rubans unidirectionnels préimprégnés et disposés de telle manière que le sens des fibres soit parallèle à celui des rubans déposés ultérieurement par enroulement représentés en 72. On dispose comme précédemment un insert 40 sur le plateauinférieur.As seen in Figure 7, the preform is made by placing around the core 81 and at the start of operation on either side of the latter which has fins 79 - 80 thick reinforcements, such as 70 and 71, consisting of elements of suitable dimensions, cut from a mattress of successive layers of unidirectional pre-impregnated tapes and arranged in such a way that the direction of the fibers is parallel to that of the tapes subsequently deposited by winding shown in 72. We have as previously an insert 40 on the lower plate.

Les pions 73 à 78 analogues aux pions 34 à 39 de la figure 3 déterminent un supplément de développement de la partie enroulée 72 de façon qu'elle puisse être repliée en 72' autour d'ailettes 79 et 80 de l'axe 81 formant l'alésage inférieur 62 lors du pressage de la préforme, tel que décrit précédemment à la figure 3. The pins 73 to 78 similar to the pins 34 to 39 of FIG. 3 determine an additional development of the coiled part 72 so that it can be folded in 72 ′ around fins 79 and 80 of the axis 81 forming l the lower bore 62 during the pressing of the preform, as described previously in FIG. 3.

Il est alors possible de passer aux opérations de moulage# analogue à celles décrites au regard de la figure 4, à ceci près que les formes des moules seront adaptées à la confection du chapeau 63 et de la tete de bielle 68. La bielle moulée sera par la suite usinée pour, d'une part, séparer le chapeau de bielle par découpage selon A=A et B-B de la figure 7 et perçage des trous- 64 à 67. It is then possible to proceed to the molding operations # analogous to those described with regard to FIG. 4, except that the shapes of the molds will be suitable for making the cap 63 and the connecting rod head 68. The molded connecting rod will be subsequently machined to, on the one hand, separate the connecting rod cap by cutting along A = A and BB in FIG. 7 and drilling holes - 64 to 67.

Claims (8)

REVENDICATIONS 1. Procédé de fabrication de bielles en matériau composite,notamment pour moteur de véhicule automobile, caractérisé par le fait que l'on constitue une ébauche par bobinage de filaments préimprégnés autour axes (32 - 33) et de plots (34 à 39) amovibles disposés sur unXplateau horizontal inférieur (31) et par introduction à l'intérieur de la partie périphérique (30) ainsi obtenue d'un insert (40) découpé dans un matelas formé de couches de matériaux préimprégnés superposées, les plots (34 à 39) étant alors éclipsés, on comprime l'ébauche précédente au moyen de deux éléments latéraux (41 - 42), mus par exemple par des vérins, le long de glissières (43 - 44) disposées sur le plateau (31), de façon à donner à l'ébauche une forme voisine de celle de la bielle définitive, un plateau supérieur venant le cas échéant coiffer l'ébauche au cours de cette opération, puis les axes (3233) sont alors éclipsés après écartement des éléments latéraux (41 - 42) et l'ébauche est transférée et centrée sur deux axes mobiles (46 - 47) de l'outil de moulage, constitué de deux plateaux horizontaux chauffants et rapprochables entre lesquels se déplacent plusieurs éléments latéraux (48 à 51) chauffants déterminant le profil extérieur final de la bielle après pressage.1. Method for manufacturing connecting rods in composite material, in particular for a motor vehicle engine, characterized in that a blank is formed by winding prepreg filaments around axes (32 - 33) and removable pads (34 to 39) arranged on a lower horizontal plate (31) and by insertion inside the peripheral part (30) thus obtained of an insert (40) cut from a mattress formed of layers of superimposed prepreg materials, the studs (34 to 39) being then eclipsed, the preceding blank is compressed by means of two lateral elements (41 - 42), moved for example by jacks, along slides (43 - 44) arranged on the plate (31), so as to give during the roughing, a shape close to that of the final connecting rod, an upper plate coming if necessary to cover the roughing during this operation, then the pins (3233) are then eclipsed after spacing of the lateral elements (41 - 42) and the draft is transferred and centered on two movable axes (46 - 47) of the molding tool, consisting of two horizontal heating and reconcilable plates between which move several lateral elements (48 to 51) heating determining the final external profile of the rod after pressing. 2. Procédé de fabrication de bielles selon la revendication 1, caractérisé en ce que l'un au moins des alésages (2 - 3) de la bielle est pourvu d'une bague métallique (45) formant coussinet centrée sur l'axe amovible correspondant (33), ladite bague comportant à sa périphérié des moletages ou rainures destinées à former un ancrage dans la matière synthétique qui l'entoure lors de l'opération ultérieure de moulage.2. Method for manufacturing connecting rods according to claim 1, characterized in that at least one of the bores (2 - 3) of the connecting rod is provided with a metal ring (45) forming a bearing centered on the corresponding removable axis (33), said ring comprising at its periphery knurling or grooves intended to form an anchor in the synthetic material which surrounds it during the subsequent molding operation. 3. Procédé de fabrication de bielles selon la revendication 1, caractérisé en ce que les fibres du matériau préimprégné eonstituant l'insert (40) sont dirigées# selon le sens longitudinal de ce dernier et travaillent en compression "en bout". 3. A method of manufacturing connecting rods according to claim 1, characterized in that the fibers of the prepreg material constituting the insert (40) are directed # in the longitudinal direction of the latter and work in compression "end". 4. Procédé de fabrication de bielles selon la revendication 1, caractérisé en ce que l'insert (40) est constitué de couches suc- cessives de matériau préimprégné réalisées à partir de fils faisant avec l'axe de l'insert (40) un angle proche de celui qui correspond à l'obliquité maximum de la bielle lors de son fonctionnement. 4. A method of manufacturing connecting rods according to claim 1, characterized in that the insert (40) consists of successive layers of prepreg material made from son forming with the axis of the insert (40) a angle close to that which corresponds to the maximum obliquity of the connecting rod during its operation. 5. Procédé de fabrication de bielles selon la revendication 1, caractérisé en ce que les préimprégnés utilisés pour l'insert (40) sont constitués de nappes de fils continus et parallèles tels que de verre, de carbone ou de Kevlar, imprégnés de résines thermodurcissables du type époxy, phénoliqu#es, polyimides, polyesters.5. A method of manufacturing connecting rods according to claim 1, characterized in that the prepregs used for the insert (40) consist of sheets of continuous and parallel son such as glass, carbon or Kevlar, impregnated with thermosetting resins epoxy, phenolic, polyimides, polyesters. 6. Procédé de fabrication de bielles selon la revendication 1, caractérisé en ce que l'axe (81) déterminant l'alésage inférieur (62) est pourvu d'ailettes (79 - 80) et que l'on dispose de part et d'autre dudit axe (81) des renforts d'épaisseur (70 - 71) découpés dans un matelas de couches successives de rubans unidirectionnels préimprégnés et disposés de façon que le sens des fibres soit parallèle à celui des fibres de la partie périphérique (72) obtenue par bobinage ultérieur autour des plots (73 à 78), l'ébauche ainsi obtenue étant ensuite moulée, puis usinée par découpage au niveau des extrémités des ailettes (79 - 80) de façon à séparer le corps (60) de la bielle de son chapeau (63), et par réalisation des perçages (64 à 67).6. A method of manufacturing connecting rods according to claim 1, characterized in that the axis (81) determining the lower bore (62) is provided with fins (79 - 80) and that one has share and d 'other of said axis (81) of the reinforcements of thickness (70 - 71) cut in a mattress of successive layers of unidirectional ribbons prepreg and arranged so that the direction of the fibers is parallel to that of the fibers of the peripheral part (72) obtained by subsequent winding around the studs (73 to 78), the blank thus obtained is then molded, then machined by cutting at the ends of the fins (79 - 80) so as to separate the body (60) from the connecting rod its cap (63), and by making holes (64 to 67). 7. Bielle pour moteur de véhicule automobile, caractérisée en ce qu'elle est constituée d'une partie centrale (40) obtenue par découpage d'un matelas formé de couches de matériaux préimprégnés constituant son corps (1) et d'une partie périphérique (30) résultant du bobinage de filaments préimprégnés, ses extrémités comportant respectivement un alésage supérieur (2) et inférieur (3) dont l'un au moins est pourvu de coussinets métalliques(45) 7. Connecting rod for motor vehicle engine, characterized in that it consists of a central part (40) obtained by cutting a mattress formed of layers of prepreg materials constituting its body (1) and a peripheral part (30) resulting from the winding of prepreg filaments, its ends respectively comprising an upper (2) and lower (3) bore, at least one of which is provided with metal pads (45) 8. Bielle selon la revendication 7, caractérisée en ce que l'alésage inférieur (62) est inscrit pour partie dans la tête de bielle (68) et pour partie dans un chapeau de bielle (63) qui lui est solidarisé par des boulons introduits dans des perçages 164 à 67) correspondants. 8. Connecting rod according to claim 7, characterized in that the lower bore (62) is partly written in the connecting rod head (68) and partly in a connecting rod cap (63) which is secured to it by introduced bolts in corresponding holes 164 to 67).
FR8304632A 1983-03-22 1983-03-22 METHOD FOR MANUFACTURING A CONNECTING ROD IN COMPOSITE MATERIAL FOR AN ENGINE, ESPECIALLY A MOTOR VEHICLE Expired FR2543054B1 (en)

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EP0295820A2 (en) * 1987-06-15 1988-12-21 Ford Motor Company Limited Resin transfer molding core,preform and process
FR2636386A1 (en) * 1988-09-13 1990-03-16 Peyrard Elongate component of high mechanical strength, and its method of manufacture
EP0373529A2 (en) * 1988-12-14 1990-06-20 Tiodize Company, Inc. Method for making a non-metallic, fiber reinforced rod end bearing assembly
EP1736674A1 (en) * 2005-06-24 2006-12-27 Snecma Mechanical part and process to manufacture such a part
EP1798428A1 (en) * 2005-12-13 2007-06-20 EADS Deutschland GmbH Braided composite part
WO2009138660A2 (en) 2008-04-23 2009-11-19 CONSEIL ET TECHNIQUE (Société à responsabilité limitée) Connecting rod formed by a composite material, and methods for producing a composite material connecting rod
US20110186212A1 (en) * 2010-02-01 2011-08-04 Toyota Jidosha Kabushiki Kaisha Method for molding continuous fiber prepreg part
EP2495094A1 (en) * 2011-03-03 2012-09-05 Magna Steyr Fahrzeugtechnik AG & Co KG Method for producing a fibre reinforced plastic component
RU2489258C2 (en) * 2008-12-24 2013-08-10 Мессье-Бюгатти-Довти Method of jointing structural element of composite material with pipe
WO2014091514A1 (en) * 2012-12-13 2014-06-19 Tepco Srl - Tecnologie Dei Polimeri E Dei Compositi Innovative connecting rod in composite material
CN113021939A (en) * 2021-02-09 2021-06-25 博戈橡胶塑料（株洲）有限公司 Manufacturing method of light-weight part based on continuous fibers and common fibers and product
CN113043621A (en) * 2021-02-09 2021-06-29 博戈橡胶塑料（株洲）有限公司 Forming method of special-shaped annular reinforcing part
WO2023031541A1 (en) * 2021-09-03 2023-03-09 Safran Machinery for winding a fibrous textured material, and associated winding method

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EP0295820A2 (en) * 1987-06-15 1988-12-21 Ford Motor Company Limited Resin transfer molding core,preform and process
EP0295820A3 (en) * 1987-06-15 1990-09-26 Ford Motor Company Limited Resin transfer molding core,preform and process
FR2636386A1 (en) * 1988-09-13 1990-03-16 Peyrard Elongate component of high mechanical strength, and its method of manufacture
EP0373529A2 (en) * 1988-12-14 1990-06-20 Tiodize Company, Inc. Method for making a non-metallic, fiber reinforced rod end bearing assembly
EP0373529A3 (en) * 1988-12-14 1993-01-13 Tiodize Company, Inc. Method for making a non-metallic, fiber reinforced rod end bearing assembly
EP1736674A1 (en) * 2005-06-24 2006-12-27 Snecma Mechanical part and process to manufacture such a part
FR2887601A1 (en) * 2005-06-24 2006-12-29 Snecma Moteurs Sa MECHANICAL PIECE AND METHOD FOR MANUFACTURING SUCH A PART
JP2007045393A (en) * 2005-06-24 2007-02-22 Snecma Mechanical parts and manufacturing method thereof
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US7597953B2 (en) 2005-12-13 2009-10-06 Eads Deutschland Gmbh Composite fiber component produced by braiding
EP1798428A1 (en) * 2005-12-13 2007-06-20 EADS Deutschland GmbH Braided composite part
WO2009138660A2 (en) 2008-04-23 2009-11-19 CONSEIL ET TECHNIQUE (Société à responsabilité limitée) Connecting rod formed by a composite material, and methods for producing a composite material connecting rod
WO2009138660A3 (en) * 2008-04-23 2010-01-07 CONSEIL ET TECHNIQUE (Société à responsabilité limitée) Connecting rod formed by a composite material, and methods for producing a composite material connecting rod
RU2489258C2 (en) * 2008-12-24 2013-08-10 Мессье-Бюгатти-Довти Method of jointing structural element of composite material with pipe
US20110186212A1 (en) * 2010-02-01 2011-08-04 Toyota Jidosha Kabushiki Kaisha Method for molding continuous fiber prepreg part
US8617336B2 (en) * 2010-02-01 2013-12-31 Toyota Jidosha Kabushiki Kaisha Method for molding continuous fiber prepreg part
EP2495094A1 (en) * 2011-03-03 2012-09-05 Magna Steyr Fahrzeugtechnik AG & Co KG Method for producing a fibre reinforced plastic component
WO2014091514A1 (en) * 2012-12-13 2014-06-19 Tepco Srl - Tecnologie Dei Polimeri E Dei Compositi Innovative connecting rod in composite material
CN113021939A (en) * 2021-02-09 2021-06-25 博戈橡胶塑料（株洲）有限公司 Manufacturing method of light-weight part based on continuous fibers and common fibers and product
CN113043621A (en) * 2021-02-09 2021-06-29 博戈橡胶塑料（株洲）有限公司 Forming method of special-shaped annular reinforcing part
CN113043621B (en) * 2021-02-09 2022-02-22 博戈橡胶塑料（株洲）有限公司 Forming method of special-shaped annular reinforcing part
CN113021939B (en) * 2021-02-09 2022-04-22 博戈橡胶塑料（株洲）有限公司 Manufacturing method of light-weight part based on continuous fibers and common fibers and product
WO2023031541A1 (en) * 2021-09-03 2023-03-09 Safran Machinery for winding a fibrous textured material, and associated winding method
FR3126640A1 (en) * 2021-09-03 2023-03-10 Safran Tooling for winding a fibrous texture and associated winding process

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