FR2752769A1 - Composite, sandwich panel with reinforced anchorage point for automobile construction - Google Patents
Composite, sandwich panel with reinforced anchorage point for automobile construction Download PDFInfo
- Publication number
- FR2752769A1 FR2752769A1 FR9610494A FR9610494A FR2752769A1 FR 2752769 A1 FR2752769 A1 FR 2752769A1 FR 9610494 A FR9610494 A FR 9610494A FR 9610494 A FR9610494 A FR 9610494A FR 2752769 A1 FR2752769 A1 FR 2752769A1
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- Prior art keywords
- panel according
- housing
- core
- skins
- resin
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Classifications
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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
- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/245—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
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- 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
- B29D99/001—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
- B62D29/004—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material the metal being over-moulded by the synthetic material, e.g. in a mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
- B62D29/048—Connections therefor, e.g. joints
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/24—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
- E04C2/246—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20 combinations of materials fully covered by E04C2/16 and E04C2/20
-
- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
-
- 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
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass 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
- B32B2607/00—Walls, panels
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Body Structure For Vehicles (AREA)
- Connection Of Plates (AREA)
Abstract
Description
La présente invention concerne un panneau composite à structure sandwich renforcé notamment pour l'ancrage d'une pièce, un véhicule automobile équipé de ce panneau et son procédé de fabrication. The present invention relates to a composite panel with a reinforced sandwich structure, in particular for anchoring a part, a motor vehicle equipped with this panel and its manufacturing process.
De tels panneaux composites sont déjà utilisés dans l'industrie automobile. Such composite panels are already used in the automotive industry.
Comme visible sur les figures 1 à 3, un tel panneau P est généralement constitué d'un noyau léger en mousse rigide ou nid d'abeilles 1 et de deux peaux dites interne 2 et externe 3 en fibres de verre ou analogue imprégnées de résine entre lesquelles est enfermé le noyau précité. As shown in FIGS. 1 to 3, such a panel P generally consists of a light core of rigid foam or honeycomb 1 and of two skins called internal 2 and external 3 made of glass fibers or the like impregnated with resin between which the above-mentioned nucleus is enclosed.
Ce type de panneau composite pose toutefois de nombreux problèmes lorsqu'on veut y ancrer des pièces pour la fixation d'éléments externes, surtout lorsque ces éléments subissent des contraintes importantes, variables ou répétées. On pourra trouver à titre d'exemple une description détaillée de ces éléments dans la demande de brevet français NO 96 00874 du 25 janvier 1996 au nom de la demanderesse. However, this type of composite panel poses many problems when it is desired to anchor parts therein for fixing external elements, especially when these elements are subjected to significant, variable or repeated stresses. A detailed description of these elements can be found by way of example in French patent application NO 96 00874 of January 25, 1996 in the name of the applicant.
On connaît déjà plusieurs méthodes pour poser un élément sur ce type de panneau sandwich, qui consistent généralement à ancrer une pièce de fixation sur le panneau, ledit élément étant à son tour fixé sur la partie de la pièce qui fait saillie à l'extérieur du panneau. Several methods are already known for placing an element on this type of sandwich panel, which generally consist in anchoring a fastening part on the panel, said element being in turn fixed on the part of the part which projects outside the sign.
Une première méthode illustrée sur la figure 1 consiste à insérer une plaque de renfort 4 dans le panneau P avant moulage du noyau 1, la plaque 4 étant plaquée contre la face interne d'une peau 2 et destinée à être traversée par une vis de fixation 5. A first method illustrated in FIG. 1 consists in inserting a reinforcing plate 4 in the panel P before molding the core 1, the plate 4 being pressed against the internal face of a skin 2 and intended to be crossed by a fixing screw 5.
La mise en place de l'insert 4 dans le panneau P complique son processus de fabrication et augmente la masse finale de l'ensemble. En outre, la mousse 1 n'est pas étanche vis-à-vis de l'extérieur et peut se dégrader au cours du temps de ce fait. The installation of the insert 4 in the panel P complicates its manufacturing process and increases the final mass of the assembly. In addition, the foam 1 is not waterproof vis-à-vis the outside and may degrade over time thereby.
Une autre méthode illustrée sur la figure 2 consiste à localement former un creux 2a et 3a dans les peaux 2 et 3 du panneau P de façon qu'elles soient en contact l'une contre l'autre et à fixer un boulon constitué d'une vis 5 et d'un écrou 6 à travers la zone à double peau ainsi formée. Another method illustrated in FIG. 2 consists in locally forming a hollow 2a and 3a in the skins 2 and 3 of the panel P so that they are in contact with one another and in fixing a bolt made of a screw 5 and a nut 6 through the double skin area thus formed.
Bien que cette méthode offre une meilleure résistance car l'ancrage se fait à travers les deux peaux du panneau, elle ne peut pas être mise en oeuvre lorsque le sens de démoulage du panneau composite n'est pas dans l'axe de la fixation. Although this method offers better resistance because the anchoring is done through the two skins of the panel, it cannot be implemented when the direction of release of the composite panel is not in the axis of the fixing.
Encore une autre méthode illustrée sur la figure 3 consiste à fixer un rivet 7 à travers une peau 2 du panneau
P.Yet another method illustrated in Figure 3 is to fix a rivet 7 through a skin 2 of the panel
P.
Toutefois, comme dans la première méthode, cette fixation ne fait travailler qu'une seule peau et la mousse 1 n'est pas étanche vis-à-vis de l'extérieur. En outre, lorsque des efforts sont appliqués sur le rivet 7, ils sont transmis à la mousse 1 dans la zone entourant son bourrelet de rivetage 7a qui a été formé lors de la mise en place du rivet, ce qui peut provoquer la dégradation de la mousse qui est bien moins rigide que les peaux. However, as in the first method, this fixing only works one skin and the foam 1 is not waterproof vis-à-vis the outside. In addition, when forces are applied to the rivet 7, they are transmitted to the foam 1 in the area surrounding its riveting bead 7a which was formed during the positioning of the rivet, which can cause degradation of the foam which is much less rigid than the skins.
Par ailleurs, les panneaux composites de ce type ne sont pas toujours suffisamment rigides et doivent être renforcés. Furthermore, composite panels of this type are not always rigid enough and must be reinforced.
La présente invention a donc pour but d'éliminer les inconvénients précités et de proposer un nouveau panneau composite renforcé qui assure une meilleure répartition des efforts transmis sur le panneau et dont la fabrication industrielle soit simple. The present invention therefore aims to eliminate the aforementioned drawbacks and to propose a new reinforced composite panel which ensures a better distribution of the forces transmitted on the panel and whose industrial manufacture is simple.
A cet effet, l'invention a pour objet un panneau composite à structure sandwich renforcé du type comprenant un noyau en mousse rigide ou analogue enfermé entre deux peaux dites interne et externe en fibres de verre ou analogue imprégnées de résine, caractérisé en ce que le noyau comporte au moins un logement ouvert et dans lequel logement est formé un plot de renfort de forme complémentaire, à rigidité élevée et en résine, venu directement de moulage avec au moins une peau. To this end, the subject of the invention is a composite panel with a reinforced sandwich structure of the type comprising a core of rigid foam or the like enclosed between two so-called internal and external skins made of glass fibers or the like impregnated with resin, characterized in that the core has at least one open housing and in which housing is formed a reinforcement pad of complementary shape, high rigidity and resin, come directly from molding with at least one skin.
Selon un premier aspect de l'invention, le panneau composite est renforcé pour l'ancrage d'une pièce et le logement précité est un logement localisé dont la forme est fonction de celle de la pièce à ancrer. According to a first aspect of the invention, the composite panel is reinforced for anchoring a part and the aforementioned housing is a localized housing whose shape is a function of that of the part to be anchored.
Dans un premier mode de réalisation, le logement précité traverse de part en part le noyau dans le sens de son épaisseur et le plot de renfort en résine définit une colonnette reliant d'un seul tenant les deux peaux interne et externe. In a first embodiment, the aforementioned housing passes right through the core in the direction of its thickness and the resin reinforcement stud defines a column connecting in one piece the two internal and external skins.
On évite ainsi l'utilisation d'un insert à l'intérieur du panneau, ce qui réduit la masse de l'ensemble. La rigidité du panneau est également améliorée du fait que les deux peaux travaillent ensemble au niveau de la pièce d'ancrage. This avoids the use of an insert inside the panel, which reduces the mass of the assembly. The rigidity of the panel is also improved by the fact that the two skins work together at the level of the anchoring part.
En outre, le panneau composite peut avoir ici un sens de démoulage quelconque. In addition, the composite panel can have any direction of demolding here.
Selon une autre caractéristique de l'invention, la portion de plus faible diamètre du plot en résine a un diamètre supérieur au plus grand diamètre de la pièce d'ancrage de façon que cette dernière soit ancrée dans le plot sans contact avec la mousse. According to another characteristic of the invention, the portion of smaller diameter of the resin pad has a diameter greater than the largest diameter of the anchoring part so that the latter is anchored in the pad without contact with the foam.
On obtient ainsi une étanchéité parfaite de la fixation, ce qui évite toute altération de la mousse. This gives perfect sealing of the binding, which prevents any deterioration of the foam.
La pièce d'ancrage peut être un boulon ou une vis autotaraudeuse par exemple. The anchor can be a bolt or a self-tapping screw for example.
Dans un autre mode de réalisation, le logement précité a une forme annulaire et le plot de renfort en résine définit une collerette reliée d'un seul tenant à la peau adjacente au logement. In another embodiment, the aforementioned housing has an annular shape and the resin reinforcement stud defines a collar connected in one piece to the skin adjacent to the housing.
Selon une autre caractéristique de l'invention, le diamètre intérieur de la collerette est supérieur au plus grand diamètre de la pièce à ancrer de façon que la collerette entoure exactement la base de ladite pièce. According to another characteristic of the invention, the internal diameter of the flange is greater than the largest diameter of the part to be anchored so that the flange exactly surrounds the base of said part.
On obtient ainsi une bien meilleure diffusion des efforts dans la mousse, car l'entrée des efforts se fait à travers la surface de la collerette. A much better distribution of the forces is thus obtained in the foam, since the forces are entered through the surface of the collar.
Dans une variante de réalisation, le panneau est un longeron formé du noyau précité entre les deux peaux interne et externe précitées et défini par une protubérance en forme de poutre sur l'une des deux peaux interne ou externe, le noyau comportant deux logements linéaires transversaux parallèles s'étendant sur toute la largeur de la poutre et chaque plot de renfort définissant ainsi une nervure reliée d'un seul tenant aux parois latérales et à la paroi de fond de la peau définissant la poutre. In an alternative embodiment, the panel is a spar formed from the aforementioned core between the two above-mentioned inner and outer skins and defined by a protrusion in the form of a beam on one of the two inner or outer skins, the core comprising two transverse linear housings parallel extending over the entire width of the beam and each reinforcement stud thus defining a rib connected in one piece to the side walls and to the bottom wall of the skin defining the beam.
On obtient ainsi également une meilleure diffusion des efforts dans les peaux et dans la mousse et une plus grande rigidité du panneau étant donné que les deux parois latérales de la peau travaillent également. This also gives better distribution of the forces in the skins and in the foam and greater rigidity of the panel since the two side walls of the skin also work.
La pièce d'ancrage peut être ici un rivet borgne, un rivet à rondelle d'appui ou un rivet à picots. The anchoring piece can here be a blind rivet, a rivet with a support washer or a rivet with pins.
Selon encore une autre caractéristique de l'invention, la profondeur du logement est supérieure ou égale à la zone de déformation du rivet lors de sa mise en place. According to yet another characteristic of the invention, the depth of the housing is greater than or equal to the deformation zone of the rivet when it is put in place.
Selon un autre aspect de l'invention, le logement précité a une forme linéaire et le plot de renfort définit au moins une nervure interne reliée d'un seul tenant à la peau adjacente au logement. According to another aspect of the invention, the aforementioned housing has a linear shape and the reinforcement stud defines at least one internal rib connected in one piece to the skin adjacent to the housing.
L'invention vise également un véhicule automobile dont la caisse comporte au moins un panneau composite tel que décrit plus haut. The invention also relates to a motor vehicle, the body of which comprises at least one composite panel as described above.
Selon une autre caractéristique, la caisse peut comporter un brancard dont au moins un longeron est constitué d'un panneau composite conforme à l'invention. According to another characteristic, the body may include a stretcher, at least one of which is made up of a composite panel according to the invention.
La présente invention a encore pour objet un procédé de fabrication du panneau composite renforcé décrit précédemment, consistant à :
- former un noyau en mousse rigide ou analogue avec au moins un logement ouvert localisé dont la forme est fonction de celle de la pièce à ancrer,
- enfermer dans un moule le noyau entre deux peaux dites interne et externe en fibres de verre ou analogue,
- injecter dans le moule une résine qui vient imprégner les fibres des deux peaux et combler le logement du noyau pour y former un plot de renfort d'un seul tenant avec au moins une peau. The present invention also relates to a process for manufacturing the reinforced composite panel described above, consisting in:
forming a core of rigid foam or the like with at least one localized open housing, the shape of which depends on that of the part to be anchored,
- enclosing the core in a mold between two so-called internal and external skins made of glass fibers or the like,
- inject a resin into the mold which impregnates the fibers of the two skins and fill the housing of the core to form a reinforcement pad in one piece with at least one skin.
L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description explicative qui va suivre de plusieurs modes de réalisation particuliers actuellement préférés de l'invention, donnés uniquement à titre illustratif et non limitatif, en référence aux dessins schématiques annexés, dans lesquels
- les figures 1 à 3 sont des vues partielles et en coupe d'un panneau composite muni d'une pièce d'ancrage suivant trois différentes méthodes connues
- la figure 4 est une vue analogue à la figure 1, mais représentant un panneau renforcé suivant un premier mode de réalisation de l'invention
- la figure 5 est une vue en perspective et partiellement arrachée du panneau renforcé de la figure 4
- la figure 6 est une vue en perspective et partiellement arrachée d'un panneau en forme de longeron de brancard suivant une variante de l'invention
- la figure 6A est une vue en perspective partielle du brancard de la figure 6
- la figure 7 est une vue partielle et en coupe d'un panneau composite renforcé selon un autre mode de réalisation de l'invention
- les figures 8 et 9 sont des vues analogues à la figure 7, mais représentant le panneau muni respectivement d'un boulon d'ancrage et d'une vis autotaraudeuse ; et
- la figure 10 est une vue en perspective et partiellement arrachée d'un panneau composite renforcé par des nervures internes selon l'invention.The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly during the explanatory description which will follow of several particular presently preferred embodiments of the invention, given solely to Illustrative and non-limiting title, with reference to the accompanying schematic drawings, in which
- Figures 1 to 3 are partial views in section of a composite panel provided with an anchoring piece according to three different known methods
- Figure 4 is a view similar to Figure 1, but showing a reinforced panel according to a first embodiment of the invention
- Figure 5 is a perspective view and partially cut away of the reinforced panel of Figure 4
- Figure 6 is a perspective view and partially broken away of a panel in the form of stretcher spar according to a variant of the invention
- Figure 6A is a partial perspective view of the stretcher of Figure 6
- Figure 7 is a partial sectional view of a reinforced composite panel according to another embodiment of the invention
- Figures 8 and 9 are views similar to Figure 7, but showing the panel provided respectively with an anchor bolt and a self-tapping screw; and
- Figure 10 is a perspective view and partially cut away of a composite panel reinforced by internal ribs according to the invention.
Suivant l'exemple de réalisation représenté sur les figures 4 et 5, le panneau composite P de l'invention comporte sur la face intérieure de la peau 2 un plot de renfort en résine 8 définissant une collerette annulaire reliée d'un seul tenant avec ladite peau. According to the embodiment shown in Figures 4 and 5, the composite panel P of the invention comprises on the inner face of the skin 2 a resin reinforcement pad 8 defining an annular flange connected integrally with said skin.
Cette collerette 8 vient combler un logement de forme complémentaire prédéfini dans la mousse rigide 1. This flange 8 fills a housing of complementary shape predefined in the rigid foam 1.
Comme cela est clairement visible sur la figure 4, le diamètre intérieur de la collerette 8 correspond sensiblement exactement au bourrelet de base 7a du rivet 7, de façon que les efforts indiqués par les petites flèches sur la figure 4 soient transmis à la mousse 1 par une surface bien plus grande correspondant au contour externe de la collerette 8. As is clearly visible in FIG. 4, the internal diameter of the flange 8 corresponds substantially exactly to the base bead 7a of the rivet 7, so that the forces indicated by the small arrows in FIG. 4 are transmitted to the foam 1 by a much larger surface corresponding to the external contour of the collar 8.
La hauteur de la collerette 8 correspond sensiblement à celle du bourrelet 7a de façon à constituer un plot de rigidité élevée dans la zone de déformation du rivet 7, ce qui évite tout délaminage de la mousse autour du rivet lors de sa mise en travail. The height of the flange 8 corresponds substantially to that of the bead 7a so as to constitute a stud of high rigidity in the deformation zone of the rivet 7, which avoids any delamination of the foam around the rivet when it is put into work.
On voit ainsi que la hauteur de la collerette 8 est nettement inférieure à l'épaisseur de la mousse 1. It can thus be seen that the height of the flange 8 is much less than the thickness of the foam 1.
L'utilisation d'un rivet borgne en combinaison avec la collerette 8 permet d'améliorer la protection de la mousse. The use of a blind rivet in combination with the flange 8 improves the protection of the foam.
La peau 2 est perçée au centre de la collerette 8 pour le passage du rivet 7. The skin 2 is pierced in the center of the collar 8 for the passage of the rivet 7.
Les figures 6 et 6A montrent une variante de réalisation du panneau de 1 invention, constitué d'un longeron de brancard B. Figures 6 and 6A show an alternative embodiment of the panel of 1 invention, consisting of a stretcher beam B.
Ce longeron B est défini par une protubérance en forme de poutre sur la peau 2. This beam B is defined by a protrusion in the form of a beam on the skin 2.
Au lieu de la collerette 8 précitée, le brancard B comporte ici deux nervures ou mini-poutres 10 qui s'étendent linéairement et parallèlement le long de la direction transversale du brancard sur toute sa largeur. Instead of the aforementioned flange 8, the stretcher B here has two ribs or mini-beams 10 which extend linearly and parallel along the transverse direction of the stretcher over its entire width.
Les nervures 10 relient ainsi en un seul tenant les deux parois latérales 9 et la paroi de fond de la peau interne 2. The ribs 10 thus connect in a single piece the two side walls 9 and the bottom wall of the internal skin 2.
La distance séparant les deux nervures 10 est supérieure au diamètre externe du bourrelet 7a, de façon que celui-ci soit logé exactement entre les deux nervures. The distance separating the two ribs 10 is greater than the external diameter of the bead 7a, so that it is housed exactly between the two ribs.
On obtient ainsi une meilleure diffusion des efforts dans les peaux et le noyau. A better distribution of the forces is thus obtained in the skins and the core.
On va maintenant décrire un autre mode de réalisation du panneau de l'invention en référence aux figures 7 à 9. We will now describe another embodiment of the panel of the invention with reference to FIGS. 7 to 9.
Le panneau P comporte ici un plot de renfort 11 qui traverse l'épaisseur du noyau 1 et relie d'un seul tenant les deux peaux interne 2 et externe 3. The panel P here comprises a reinforcement stud 11 which crosses the thickness of the core 1 and connects in one piece the two inner skins 2 and outer 3.
On voit sur la figure 7 que le plot de renfort 11 a avantageusement une forme en diabolo. It can be seen in FIG. 7 that the reinforcement stud 11 advantageously has a diabolo shape.
On peut fixer à travers le plot 11 un boulon constitué d'une vis 5 et d'un écrou 6, comme représenté sur la figure 8. A bolt consisting of a screw 5 and a nut 6 can be fixed through the stud 11, as shown in FIG. 8.
Dans ce cas, la fixation traverse de part en part le panneau P, mais n'entre pas en contact avec le noyau 1, le plot en résine 11 constituant ainsi une barrière étanche visà-vis de l'extérieur. In this case, the fixing passes right through the panel P, but does not come into contact with the core 1, the resin pad 11 thus constituting a tight barrier vis-à-vis the outside.
On peut également en variante, comme illustré sur la figure 9, fixer une vis autotaraudeuse 12 dans le plot 11, de façon que cette vis 12 ne débouche pas sur l'autre côté du panneau. Alternatively, as illustrated in FIG. 9, it is also possible to fix a self-tapping screw 12 in the stud 11, so that this screw 12 does not open on the other side of the panel.
Dans encore un autre mode de réalisation représenté sur la figure 10, le noyau 1 du panneau P comporte un logement destiné à recevoir un plot en résine définissant un réseau de nervures internes entrecroisées 13 qui sont reliées d'un seul tenant avec la peau 2 pour renforcer le panneau. In yet another embodiment shown in FIG. 10, the core 1 of the panel P comprises a housing intended to receive a resin stud defining a network of interwoven internal ribs 13 which are connected in one piece with the skin 2 for reinforce the panel.
On voit également que les nervures peuvent être reliées à un plot de renfort 11 en forme de diabolo qui est percé en ila pour recevoir par exemple un boulon. It is also seen that the ribs can be connected to a reinforcing stud 11 in the form of a diabolo which is pierced ila to receive for example a bolt.
Bien entendu, la résine constitutive des plots 8, 10, 11 et 13 est la même que celle qui vient imprégner les fibres des peaux 2 et 3. Of course, the resin constituting the pads 8, 10, 11 and 13 is the same as that which impregnates the fibers of the skins 2 and 3.
Bien que l'invention ait été décrite en liaison avec des exemples particuliers de réalisation, il est bien évident qu'elle n'y ait nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre des revendications qui suivent. Although the invention has been described in connection with particular examples of embodiment, it is obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described as well as their combinations if these fall within the scope of the claims which follow.
Claims (14)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9610494A FR2752769B1 (en) | 1996-08-27 | 1996-08-27 | REINFORCED COMPOSITE PANEL, PARTICULARLY FOR ANCHORING A WORKPIECE, MOTOR VEHICLE EQUIPPED WITH THIS PANEL AND MANUFACTURING METHOD THEREOF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9610494A FR2752769B1 (en) | 1996-08-27 | 1996-08-27 | REINFORCED COMPOSITE PANEL, PARTICULARLY FOR ANCHORING A WORKPIECE, MOTOR VEHICLE EQUIPPED WITH THIS PANEL AND MANUFACTURING METHOD THEREOF |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2752769A1 true FR2752769A1 (en) | 1998-03-06 |
| FR2752769B1 FR2752769B1 (en) | 1998-12-04 |
Family
ID=9495235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9610494A Expired - Fee Related FR2752769B1 (en) | 1996-08-27 | 1996-08-27 | REINFORCED COMPOSITE PANEL, PARTICULARLY FOR ANCHORING A WORKPIECE, MOTOR VEHICLE EQUIPPED WITH THIS PANEL AND MANUFACTURING METHOD THEREOF |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2752769B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2832369A1 (en) * | 2001-11-16 | 2003-05-23 | Wagon Automotive Snc | Sealed fixing for component fitting in recess in vehicle bodywork comprises thin metal plate, foam layer and joint |
| FR2834926A1 (en) * | 2002-01-22 | 2003-07-25 | Renault | Automobile motor cradle has at least one core of synthetic foam, between reinforcement layers, with a bonded elastic elastomer section, shaped in a mold with injected heat-setting resin to give a rigid structure |
| ES2209669A1 (en) * | 2004-03-18 | 2004-06-16 | Jose Antonio Asumendi Garcia | Construction system from prefabricated panels and prefabricated panel used (Machine-translation by Google Translate, not legally binding) |
| DE102014104751A1 (en) | 2014-04-03 | 2015-10-08 | Thyssenkrupp Steel Europe Ag | Method for connecting a connection element to a sandwich panel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2399915A1 (en) * | 1977-08-11 | 1979-03-09 | Messerschmitt Boelkow Blohm | PROCESS FOR THE MANUFACTURE OF SANDWICH PANEL TYPE CONSTRUCTION ELEMENTS |
| GB2052388A (en) * | 1979-06-02 | 1981-01-28 | Nissan Motor | Noise reducing cover for an internal combustion engine |
| EP0119131A1 (en) * | 1983-03-10 | 1984-09-19 | Regie Nationale Des Usines Renault | Composite body element |
| WO1989000495A1 (en) * | 1987-07-10 | 1989-01-26 | 3-D Composites Limited | Moulding method |
| US5079055A (en) * | 1989-09-21 | 1992-01-07 | Doyle Brian P | Reinforcement for laminate synthetic materials |
-
1996
- 1996-08-27 FR FR9610494A patent/FR2752769B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2399915A1 (en) * | 1977-08-11 | 1979-03-09 | Messerschmitt Boelkow Blohm | PROCESS FOR THE MANUFACTURE OF SANDWICH PANEL TYPE CONSTRUCTION ELEMENTS |
| GB2052388A (en) * | 1979-06-02 | 1981-01-28 | Nissan Motor | Noise reducing cover for an internal combustion engine |
| EP0119131A1 (en) * | 1983-03-10 | 1984-09-19 | Regie Nationale Des Usines Renault | Composite body element |
| WO1989000495A1 (en) * | 1987-07-10 | 1989-01-26 | 3-D Composites Limited | Moulding method |
| US5079055A (en) * | 1989-09-21 | 1992-01-07 | Doyle Brian P | Reinforcement for laminate synthetic materials |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2832369A1 (en) * | 2001-11-16 | 2003-05-23 | Wagon Automotive Snc | Sealed fixing for component fitting in recess in vehicle bodywork comprises thin metal plate, foam layer and joint |
| EP1314611A2 (en) * | 2001-11-16 | 2003-05-28 | Wagon Automotive Snc | Dichtende Befestigungsvorrichtung eines Teils auf der Karosserie eines Fahrzeuges |
| EP1314611A3 (en) * | 2001-11-16 | 2004-02-04 | Wagon Automotive Snc | Dichtende Befestigungsvorrichtung eines Teils auf der Karosserie eines Fahrzeuges |
| FR2834926A1 (en) * | 2002-01-22 | 2003-07-25 | Renault | Automobile motor cradle has at least one core of synthetic foam, between reinforcement layers, with a bonded elastic elastomer section, shaped in a mold with injected heat-setting resin to give a rigid structure |
| ES2209669A1 (en) * | 2004-03-18 | 2004-06-16 | Jose Antonio Asumendi Garcia | Construction system from prefabricated panels and prefabricated panel used (Machine-translation by Google Translate, not legally binding) |
| DE102014104751A1 (en) | 2014-04-03 | 2015-10-08 | Thyssenkrupp Steel Europe Ag | Method for connecting a connection element to a sandwich panel |
| EP2946867A1 (en) | 2014-04-03 | 2015-11-25 | ThyssenKrupp Steel Europe AG | Method for connecting a connecting element to a sandwich panel of sheet metal through material joining, in particular through welding |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2752769B1 (en) | 1998-12-04 |
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