WO2007128927A1 - Multifunction hydroformed or profiled roof cross member - Google Patents

Multifunction hydroformed or profiled roof cross member Download PDF

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Publication number
WO2007128927A1
WO2007128927A1 PCT/FR2007/051045 FR2007051045W WO2007128927A1 WO 2007128927 A1 WO2007128927 A1 WO 2007128927A1 FR 2007051045 W FR2007051045 W FR 2007051045W WO 2007128927 A1 WO2007128927 A1 WO 2007128927A1
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WO
WIPO (PCT)
Prior art keywords
cross member
roof
motor vehicle
manufacturing
receiving
Prior art date
Application number
PCT/FR2007/051045
Other languages
French (fr)
Inventor
Thierry Ginestet
Guillaume Lavinal
Bernard Lecomte
Original Assignee
Renault S.A.S
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 Renault S.A.S filed Critical Renault S.A.S
Publication of WO2007128927A1 publication Critical patent/WO2007128927A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/06—Fixed roofs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D27/00—Connections between superstructure or understructure sub-units
    • B62D27/02—Connections between superstructure or understructure sub-units rigid
    • B62D27/026—Connections by glue bonding

Definitions

  • the invention relates to a method of manufacturing a roof cross member of a body structure of a motor vehicle, particularly suitable for the manufacture of a front cross member and central roof, whose function is, in addition to its mechanical function within the structure of the bodywork, to maintain a windshield and a roof.
  • the invention also relates to the cross member as such and to a motor vehicle comprising such a cross member.
  • the body structures of motor vehicles as schematically shown in Figure 1 often include a front cross member 1 and rear 2, extending transversely to the vehicle on either side of the roof, the first function of which is ensure the rigidity of the entire structure of the bodywork.
  • the front crossmember 1 is generally at the intersection between the bay pillars 3 and 3 'which frame and support the windshield and the roof shafts 4 and 4' which extend longitudinally towards the rear of the roof to the transom 2.
  • This front cross member 1 receives on a first side before the upper part of the windshield and on the second rear side the front end of the roof of the vehicle.
  • the roof rear cross member 2 delimits the rear portion of the roof of the rear window.
  • the central cross member 10 positioned recessed in the body structure with respect to a front cross member can be used without the front cross member for the case of a windshield type "full sky".
  • This diversity of sleepers represents a first economic disadvantage of a cost high manufacturing of different vehicles.
  • existing sleepers are manufactured by stamping and have a generally bulky shape, ending in a transverse rabbet at the front and rear. They thus have the second disadvantage of representing a significant obstruction to light and make it difficult to obtain a good clarity in the cabin in the case of a glass roof for example.
  • Figure 2 illustrates a cross section of such a front cross member 1 of the prior art, adapted to a vehicle with sunroof.
  • This cross-member 1 has been stamped and has a front rebate 6 and rear 8. It receives the upper part of the windshield 5 on its front rabbet 6 and the cassette of a sunroof 7 on its rear rabbet 8.
  • the angle of clarity A defined by the angle between the horizon 9, observed by the driver, and the axis of vision through the sunroof 7 closest to the crossbar 1 has a high value which forces the driver to move the eyes, even the head, to look above the cross 1. It therefore does not benefit directly from the clarity of the sunroof 7, which is reduced because of the significant obstruction of the cross.
  • this obstruction is due on the one hand to the generally elongated shape of the cross and on the other hand by rebates 6, 8 at both ends which further extend this cross.
  • this cross 1 is specifically adapted to the sunroof and unsuitable for other types of roof. There is therefore the need to change its structure for different pavilions.
  • the object of the present invention is therefore to provide a manufacturing method for a motor vehicle crossbar which does not have the disadvantages of the solutions of the prior art. More specifically, a first object of the present invention is to provide a vehicle transom which represents an economic gain for motor vehicles.
  • a second object of the present invention is to provide a cross member of a motor vehicle that improves the clarity of its cabin.
  • a third object of the present invention is to provide a vehicle crossmember whose mechanical characteristics are satisfactory for use in a generally conventional body structure of a motor vehicle.
  • the invention is based on a method of manufacturing a bodywork cross member of a motor vehicle characterized in that it comprises a step of hydroforming a metal tube.
  • the method of manufacturing a cross-member may comprise a step of profiling on rollers of a metal element and then a step of bending the profile obtained.
  • the method of manufacturing a cross member may further comprise a profiling step of the profile.
  • the method of manufacturing an automobile body according to the invention is characterized in that it comprises a step of manufacturing a cross member according to the method defined above then a step of fixing a sheet reported by welding points by resistance or clinching on the end of the crosspiece for attachment to an amount of rack.
  • the cross member of a motor vehicle according to the invention is characterized in that it is in the form of a hydroformed tube or profile, without rabbet, obtained by a manufacturing process defined above, and in that it comprises a top surface having a plurality of steps to form flag-receiving areas at different heights in order to receive several different types of flags.
  • the roof crossmember may be a front cross member or central vehicle which includes a first step in the rear portion of its upper surface to receive a sunroof cassette, a second step in its front portion to receive a lower portion of sheet metal roof and to receive the upper end of a windshield.
  • the roof crossmember may comprise a third central step capable of receiving the bonding of a fixed glass roof.
  • the roof crossmember may comprise from the rear to the front of the crossmember a step of the lowest height suitable for fixing an opening glass roof support, a highest step capable of fixing a glass roof and at least one other step suitable for fixing a sheet metal roof.
  • the motor vehicle according to the invention comprises a cross member defined above.
  • the series of motor vehicles according to the invention is characterized in that it comprises vehicles with different flags, of the type comprising sunroofs, glass roofs and roofs made of sheet metal and all vehicles in the series include the same front or center crosshead defined above.
  • Figure 1 shows a schematic view of a current structure of a body of a motor vehicle
  • Figure 2 shows a cross-sectional view at the front cross member of a vehicle with sunroof of the prior art
  • 3 shows a cross-sectional view of a cross member according to one embodiment of the invention in a configuration of a vehicle with sunroof
  • FIG. 4 represents a cross-sectional view of the cross member according to the embodiment of the invention of FIG.
  • Figure 5 shows a cross-sectional view of the cross member according to the embodiment of the invention of Figure 3 in a configuration of a vehicle with a fixed glass roof
  • Figure 6 shows a perspective view of a front cross member according to the embodiment of the invention
  • Figure 7 shows a perspective view from above of a cross portion according to the embodiment of the invention in preparation for assembly
  • 8 shows a perspective view from above a cross section according to the embodiment of the invention at its connection with an amount of rack and / or a stretcher.
  • the cross member is obtained by a hydroformed tube or a profile obtained by a profiling method such as that commonly known by its English name "roll forming", comprising a bending step or shaping.
  • a profiling method such as that commonly known by its English name "roll forming”, comprising a bending step or shaping.
  • some more precise final cuts may optionally be added by a plasma cutting step.
  • FIGS. 3 to 5 illustrate a front cross member 1 1 of a motor vehicle as obtained by one of the preceding methods.
  • This crossbar is therefore in the form of a tube or a profile, no longer includes rebate, and has an upper surface comprising mainly three surfaces or steps 12, 13, 14 of different height, extending over the entire length of the crossbar so transversely to a vehicle on which the cross is mounted. These steps are adapted to the reception of different types of roof as is detailed with reference to FIGS. 3 to 5.
  • the windshield 15 is fixed on the front step 14 of the cross member 1 1 by a seal of glue 16.
  • FIG 3 shows the implementation of the crossbar 11 in a vehicle configuration with sunroof.
  • the sunroof cassette comprises a support 17, glued on a first step 12 of the upper surface of the cross member 1 1 by an adhesive joint 19 extending transversely over the entire cross member 1 1, and a window 20, movable relative 17.
  • the height of the step 12 is designed so that the window 20 of the sunroof comes to the same level as the upper end of the windshield 15, in a flush manner, to form an aerodynamic and aesthetic continuity of the upper surface of the vehicle.
  • a not shown seal is disposed in the space between the windshield 15 and the glass sunroof 20.
  • Figure 4 shows the implantation of the same cross member 1 1 in a vehicle configuration with a conventional sheet roof 20 '.
  • Such a roof has an upper surface 22 which is flush with the upper end of the windshield 15 and a front portion of connection which comprises a lower portion 21 positioned on the front step 14 of the cross member 1 1, which extends beyond of the windshield gluing track 15.
  • FIG. 5 shows the installation of the cross member 11 in a vehicle configuration with a fixed glass roof 20.
  • a roof is adhered to a third central step 13 of the upper surface of the cross member 11 by a glue joint 19 ', so as to come as well in the extension of the end of the windshield 15.
  • the sleeper is no longer stamped classically and obtained by the union of two pieces by welding, it no longer has the rabbets of the prior art which had the disadvantage of damaging the clarity of the passenger compartment.
  • the method of manufacturing these crosspieces provides a reduced footprint for the same mechanical performance compared to the sleepers of the prior art presented above with reference to Figures 1 and 2, performance particularly measured by its inertia and stiffness.
  • This solution is suitable both for the realization of a front cross member, a central cross member and a rear cross member.
  • the differentiation between the front cross member and central will be carried out after the bending step common to the two crosspieces, by an additional step of shaping for the front crossbar only.
  • the acoustic mass function can be achieved by inserting a mass in the hollow body after forming or by a thick sheet populated on the underside of the hollow body.
  • FIG. 6 represents a perspective view of a front cross member portion 1 1 according to the invention, obtained from a hydroformed tube or a curved curved profile, the upper surface of which has the three steps 12, 13 14, which are arranged in an order from the rear towards the front in the longitudinal direction of a vehicle on which the crossmember 11 is mounted, to form reception points of different height in order to allow the fixing of several pavilions of different nature, as described above.
  • the invention also relates to a method of attaching a cross member to rack struts, a method of manufacturing a car body.
  • roof receiving points positioned on its upper surface which are advanced with respect to the solutions of the prior art, which makes it possible to advance the positioning of elements which hide the light as the support. 17 of a sunroof, which also improves the clarity of the cabin; it has satisfactory mechanical properties, is compatible with the usual bodywork structures;
  • the invention has been illustrated in the context of a front cross link flag / windshield but could be implemented in the context of a rear cross, a system of steps on the front of its upper surface also to accommodate several different pavilions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

Motor vehicle roof cross member obtained by means of a hydroformed tube or section characterised in that it comprises an upper surface displaying several steps (12,13,14) for form roof reception zones at different heights in order to be able to receive several different types of roofs.

Description

Traverse de pavillons hvdroformée ou profilée multifonctionsHvdroformed or multifunctional profiled sleeper cross
L'invention concerne un procédé de fabrication d'une traverse de pavillon d'une structure de carrosserie d'un véhicule automobile, particulièrement adapté à la fabrication d'une traverse avant et centrale de pavillon, dont la fonction est, outre sa fonction mécanique au sein de la structure de la carrosserie, d'assurer le maintien d'un pare brise et d'un toit. L'invention porte aussi sur la traverse en tant que telle et sur un véhicule automobile comprenant une telle traverse.The invention relates to a method of manufacturing a roof cross member of a body structure of a motor vehicle, particularly suitable for the manufacture of a front cross member and central roof, whose function is, in addition to its mechanical function within the structure of the bodywork, to maintain a windshield and a roof. The invention also relates to the cross member as such and to a motor vehicle comprising such a cross member.
Aujourd'hui, les structures de carrosserie de véhicules automobiles telles que représentées schématiquement sur la figure 1 comprennent souvent une traverse avant 1 et arrière 2, s'étendant transversalement au véhicule de part et d'autre du toit, dont la première fonction est d'assurer la rigidité de l'ensemble de la structure de la carrosserie. La traverse avant 1 se trouve généralement au croisement entre les montants de baie 3 et 3' qui encadrent et soutiennent le pare brise et les brancards de pavillon 4 et 4' qui s'étendent longitudinalement vers l'arrière du pavillon jusqu'à la traverse arrière 2. Cette traverse avant 1 reçoit sur un premier côté avant la partie supérieure du pare-brise et sur le second côté arrière l'extrémité avant du toit du véhicule. De manière semblable, la traverse arrière 2 de pavillon délimite la partie arrière du toit de la lunette arrière. Une traverse centrale 10, représentée en pointillé, s'étend transversalement, au droit du pied milieu, non représenté, du véhicule. En variante non représentée, la traverse centrale 10, positionnée en retrait dans la structure de la carrosserie par rapport à une traverse avant peut être utilisée sans la traverse avant pour le cas d'un pare-brise du type « plein ciel ». Il existe aujourd'hui une traverse particulière par type de pavillon. Cette diversité des traverses représente un premier inconvénient économique d'un coût élevé de fabrication des différents véhicules. D'autre part, les traverses existantes sont fabriquées par emboutissage et présentent une forme globalement encombrante, se terminant par une feuillure transversale à l'avant et à l'arrière. Elles présentent ainsi le second inconvénient de représenter une obstruction importante à la lumière et de rendre difficile l'obtention d'une bonne clarté dans l'habitacle dans le cas d'un toit en verre par exemple.Today, the body structures of motor vehicles as schematically shown in Figure 1 often include a front cross member 1 and rear 2, extending transversely to the vehicle on either side of the roof, the first function of which is ensure the rigidity of the entire structure of the bodywork. The front crossmember 1 is generally at the intersection between the bay pillars 3 and 3 'which frame and support the windshield and the roof shafts 4 and 4' which extend longitudinally towards the rear of the roof to the transom 2. This front cross member 1 receives on a first side before the upper part of the windshield and on the second rear side the front end of the roof of the vehicle. Similarly, the roof rear cross member 2 delimits the rear portion of the roof of the rear window. A central cross member 10, shown in dashed lines, extends transversely to the right of the middle foot, not shown, of the vehicle. In variant not shown, the central cross member 10, positioned recessed in the body structure with respect to a front cross member can be used without the front cross member for the case of a windshield type "full sky". There is today a particular cross by type of pavilion. This diversity of sleepers represents a first economic disadvantage of a cost high manufacturing of different vehicles. On the other hand, existing sleepers are manufactured by stamping and have a generally bulky shape, ending in a transverse rabbet at the front and rear. They thus have the second disadvantage of representing a significant obstruction to light and make it difficult to obtain a good clarity in the cabin in the case of a glass roof for example.
La figure 2 illustre une coupe transversale d'une telle traverse avant 1 de l'art antérieur, adaptée à un véhicule avec toit ouvrant. Cette traverse 1 a été emboutie et présente une feuillure avant 6 et arrière 8. Elle reçoit la partie supérieure du pare brise 5 sur sa feuillure avant 6 et la cassette d'un toit ouvrant 7 sur sa feuillure arrière 8. L'angle de clarté A, défini par l'angle entre l'horizon 9, observé par le conducteur, et l'axe de vision à travers le toit ouvrant 7 le plus proche de la traverse 1 présente une valeur élevée qui oblige le conducteur à bouger les yeux, voire la tête, pour regarder au-dessus de la traverse 1. Il ne profite donc pas directement de la clarté du toit ouvrant 7, qui est réduite du fait de l'obstruction importante de la traverse. Cette obstruction est due d'une part à la forme globalement allongée de la traverse et d'autre part par les feuillures 6, 8 aux deux extrémités qui allongent encore cette traverse. De plus, comme cela a été mentionné précédemment, cette traverse 1 est spécifiquement adaptée au toit ouvrant et inadaptée aux autres types de toit. Il y a donc la nécessité de changer sa structure pour des pavillons différents.Figure 2 illustrates a cross section of such a front cross member 1 of the prior art, adapted to a vehicle with sunroof. This cross-member 1 has been stamped and has a front rebate 6 and rear 8. It receives the upper part of the windshield 5 on its front rabbet 6 and the cassette of a sunroof 7 on its rear rabbet 8. The angle of clarity A, defined by the angle between the horizon 9, observed by the driver, and the axis of vision through the sunroof 7 closest to the crossbar 1 has a high value which forces the driver to move the eyes, even the head, to look above the cross 1. It therefore does not benefit directly from the clarity of the sunroof 7, which is reduced because of the significant obstruction of the cross. This obstruction is due on the one hand to the generally elongated shape of the cross and on the other hand by rebates 6, 8 at both ends which further extend this cross. In addition, as mentioned above, this cross 1 is specifically adapted to the sunroof and unsuitable for other types of roof. There is therefore the need to change its structure for different pavilions.
L'objet de la présente invention consiste donc à proposer un procédé de fabrication pour une traverse de véhicule automobile qui ne présente pas les inconvénients des solutions de l'art antérieur. Plus précisément, un premier objet de la présente invention consiste à proposer une traverse de véhicule qui représente un gain économique pour les véhicules automobiles.The object of the present invention is therefore to provide a manufacturing method for a motor vehicle crossbar which does not have the disadvantages of the solutions of the prior art. More specifically, a first object of the present invention is to provide a vehicle transom which represents an economic gain for motor vehicles.
Un second objet de la présente invention consiste à proposer une traverse de véhicule automobile qui améliore la clarté de son habitacle.A second object of the present invention is to provide a cross member of a motor vehicle that improves the clarity of its cabin.
Un troisième objet de la présente invention consiste à proposer une traverse de véhicule dont les caractéristiques mécaniques sont satisfaisantes pour leur utilisation dans une structure globalement classique de carrosserie d'un véhicule automobile.A third object of the present invention is to provide a vehicle crossmember whose mechanical characteristics are satisfactory for use in a generally conventional body structure of a motor vehicle.
L'invention repose sur un procédé de fabrication d'une traverse de carrosserie de véhicule automobile caractérisé en ce qu'il comprend une étape d'hydroformage d'un tube métallique.The invention is based on a method of manufacturing a bodywork cross member of a motor vehicle characterized in that it comprises a step of hydroforming a metal tube.
Le procédé de fabrication d'une traverse peut comprendre une étape de profilage sur galets d'un élément métallique puis une étape de cintrage du profilé obtenu.The method of manufacturing a cross-member may comprise a step of profiling on rollers of a metal element and then a step of bending the profile obtained.
Le procédé de fabrication d'une traverse peut comprendre en outre une étape de galbage du profilé.The method of manufacturing a cross member may further comprise a profiling step of the profile.
Le procédé de fabrication d'une carrosserie automobile selon l'invention est caractérisé en ce qu'il comprend une étape de fabrication d'une traverse selon le procédé défini précédemment puis une étape de fixation d'une tôle rapportée par des points de soudure par résistance ou clinchage sur l'extrémité de la traverse en vue de sa fixation sur un montant de baie. La traverse de pavillon de véhicule automobile selon l'invention est caractérisée en ce qu'elle se présente comme un tube hydroformé ou un profilé, sans feuillure, obtenue par un procédé de fabrication défini précédemment, et en ce qu'elle comprend une surface supérieure présentant plusieurs marches pour former des zones d'accueil de pavillon à des hauteurs différentes afin de pouvoir recevoir plusieurs types de pavillons différents.The method of manufacturing an automobile body according to the invention is characterized in that it comprises a step of manufacturing a cross member according to the method defined above then a step of fixing a sheet reported by welding points by resistance or clinching on the end of the crosspiece for attachment to an amount of rack. The cross member of a motor vehicle according to the invention is characterized in that it is in the form of a hydroformed tube or profile, without rabbet, obtained by a manufacturing process defined above, and in that it comprises a top surface having a plurality of steps to form flag-receiving areas at different heights in order to receive several different types of flags.
La traverse de pavillon peut être une traverse avant ou centrale de véhicule qui comprend une première marche dans la partie arrière de sa surface supérieure pour recevoir une cassette de toit ouvrant, une seconde marche dans sa partie antérieure pour recevoir une portion basse de toit en tôle et pour recevoir l'extrémité supérieure d'un pare brise.The roof crossmember may be a front cross member or central vehicle which includes a first step in the rear portion of its upper surface to receive a sunroof cassette, a second step in its front portion to receive a lower portion of sheet metal roof and to receive the upper end of a windshield.
La traverse de pavillon peut comprendre une troisième marche centrale apte à recevoir le collage d'un toit en verre fixe.The roof crossmember may comprise a third central step capable of receiving the bonding of a fixed glass roof.
La traverse de pavillon peut comprendre depuis l'arrière vers l'avant de la traverse une marche de hauteur la plus basse apte à la fixation d'un support de toit en verre ouvrant, une marche la plus haute apte à la fixation d'un toit en verre et au moins une autre marche apte à la fixation d'un toit en tôle.The roof crossmember may comprise from the rear to the front of the crossmember a step of the lowest height suitable for fixing an opening glass roof support, a highest step capable of fixing a glass roof and at least one other step suitable for fixing a sheet metal roof.
Le véhicule automobile selon l'invention comprend une traverse définie précédemment.The motor vehicle according to the invention comprises a cross member defined above.
La série de véhicules automobiles selon l'invention est caractérisée en ce qu'elle comprend des véhicules avec des pavillons différents, du type comprenant des toits ouvrants, des toits en verre et des toits en tôle et en ce que tous les véhicules de la série comprennent la même traverse avant ou centrale définie précédemment.The series of motor vehicles according to the invention is characterized in that it comprises vehicles with different flags, of the type comprising sunroofs, glass roofs and roofs made of sheet metal and all vehicles in the series include the same front or center crosshead defined above.
Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d'un mode d'exécution particulier fait à titre non-limitatif en relation avec les figures jointes parmi lesquelles :These objects, features and advantages of the present invention will be set forth in detail in the following description of a particular embodiment made in a non-limiting manner in relation to the appended figures among which:
La figure 1 représente une vue schématique d'une structure courante d'une carrosserie d'un véhicule automobile ; la figure 2 représente une vue en coupe transversale au niveau de la traverse avant d'un véhicule avec toit ouvrant de l'art antérieur ; la figure 3 représente une vue en coupe transversale d'une traverse selon un mode d'exécution de l'invention dans une configuration d'un véhicule avec toit ouvrant ; la figure 4 représente une vue en coupe transversale de la traverse selon le mode d'exécution de l'invention de la figure 3 dans une configuration d'un véhicule avec toit en tôle classique ; la figure 5 représente une vue en coupe transversale de la traverse selon le mode d'exécution de l'invention de la figure 3 dans une configuration d'un véhicule avec toit en verre fixe ; la figure 6 représente une vue en perspective d'une traverse avant selon le mode d'exécution de l'invention ; la figure 7 représente une vue en perspective de dessus d'une partie de traverse selon le mode d'exécution de l'invention en préparation d'assemblage ; la figure 8 représente en perspective de dessus une partie de traverse selon le mode d'exécution de l'invention au niveau de sa liaison avec un montant de baie et/ou un brancard. Selon un mode d'exécution de l'invention, la traverse est obtenue par un tube hydroformé ou par un profilé obtenu par un procédé de profilage comme celui communément appelé par sa dénomination anglo-saxonne « roll forming », comprenant une étape de cintrage voire de galbage. En outre, certaines découpes finales plus précises peuvent être optionnellement ajoutées par une étape de découpe plasma.Figure 1 shows a schematic view of a current structure of a body of a motor vehicle; Figure 2 shows a cross-sectional view at the front cross member of a vehicle with sunroof of the prior art; 3 shows a cross-sectional view of a cross member according to one embodiment of the invention in a configuration of a vehicle with sunroof; FIG. 4 represents a cross-sectional view of the cross member according to the embodiment of the invention of FIG. 3 in a configuration of a vehicle with a conventional sheet-metal roof; Figure 5 shows a cross-sectional view of the cross member according to the embodiment of the invention of Figure 3 in a configuration of a vehicle with a fixed glass roof; Figure 6 shows a perspective view of a front cross member according to the embodiment of the invention; Figure 7 shows a perspective view from above of a cross portion according to the embodiment of the invention in preparation for assembly; 8 shows a perspective view from above a cross section according to the embodiment of the invention at its connection with an amount of rack and / or a stretcher. According to one embodiment of the invention, the cross member is obtained by a hydroformed tube or a profile obtained by a profiling method such as that commonly known by its English name "roll forming", comprising a bending step or shaping. In addition, some more precise final cuts may optionally be added by a plasma cutting step.
Les figures 3 à 5 illustrent une traverse avant 1 1 d'un véhicule automobile telle qu'obtenue par un des procédés précédents. Cette traverse se présente donc sous la forme d'un tube ou d'un profilé, ne comprend plus de feuillure, et présente une surface supérieure comprenant principalement trois surfaces ou marches 12, 13, 14 de hauteur différente, s'étendant sur toute la longueur de la traverse donc transversalement à un véhicule sur laquelle la traverse est montée. Ces marches sont adaptées à la réception de différents types de pavillon comme cela est détaillé en référence aux figures 3 à 5. Dans tous les cas, le pare-brise 15 est fixé sur la marche antérieure 14 de la traverse 1 1 par un joint de colle 16.Figures 3 to 5 illustrate a front cross member 1 1 of a motor vehicle as obtained by one of the preceding methods. This crossbar is therefore in the form of a tube or a profile, no longer includes rebate, and has an upper surface comprising mainly three surfaces or steps 12, 13, 14 of different height, extending over the entire length of the crossbar so transversely to a vehicle on which the cross is mounted. These steps are adapted to the reception of different types of roof as is detailed with reference to FIGS. 3 to 5. In all cases, the windshield 15 is fixed on the front step 14 of the cross member 1 1 by a seal of glue 16.
La figure 3 représente l'implantation de la traverse 11 dans une configuration de véhicule avec toit ouvrant. La cassette de toit ouvrant comprend un support 17, collé sur une première marche 12 de la surface supérieure de la traverse 1 1 par un joint de colle 19 s'étendant transversalement sur toute la traverse 1 1 , et une vitre 20, mobile par rapport au support 17. La hauteur de la marche 12 est prévue pour que la vitre 20 du toit ouvrant vienne au même niveau que l'extrémité supérieure du pare brise 15, de manière affleurante, pour former une continuité aérodynamique et esthétique de la surface supérieure du véhicule. Un joint d'étanchéité non représenté est disposé dans l'espace entre le pare brise 15 et le toit ouvrant en verre 20. La figure 4 représente l'implantation de la même traverse 1 1 dans une configuration de véhicule avec un toit en tôle conventionnel 20'. Un tel toit présente une surface supérieure 22 qui vient affleurer l'extrémité supérieure du pare brise 15 et une partie avant de liaison qui comprend une portion basse 21 positionnée sur la marche antérieure 14 de la traverse 1 1 , qui s'étend au-delà de la piste de collage du pare-brise 15.Figure 3 shows the implementation of the crossbar 11 in a vehicle configuration with sunroof. The sunroof cassette comprises a support 17, glued on a first step 12 of the upper surface of the cross member 1 1 by an adhesive joint 19 extending transversely over the entire cross member 1 1, and a window 20, movable relative 17. The height of the step 12 is designed so that the window 20 of the sunroof comes to the same level as the upper end of the windshield 15, in a flush manner, to form an aerodynamic and aesthetic continuity of the upper surface of the vehicle. A not shown seal is disposed in the space between the windshield 15 and the glass sunroof 20. Figure 4 shows the implantation of the same cross member 1 1 in a vehicle configuration with a conventional sheet roof 20 '. Such a roof has an upper surface 22 which is flush with the upper end of the windshield 15 and a front portion of connection which comprises a lower portion 21 positioned on the front step 14 of the cross member 1 1, which extends beyond of the windshield gluing track 15.
Enfin, la figure 5 représente l'implantation de la traverse 1 1 dans une configuration de véhicule avec toit fixe en verre 20". Un tel toit vient se coller sur une troisième marche centrale 13 de la surface supérieure de la traverse 1 1 par un joint de colle 19', de manière à venir de même dans le prolongement de l'extrémité du pare brise 15.Finally, FIG. 5 shows the installation of the cross member 11 in a vehicle configuration with a fixed glass roof 20. Such a roof is adhered to a third central step 13 of the upper surface of the cross member 11 by a glue joint 19 ', so as to come as well in the extension of the end of the windshield 15.
Ces précédentes figures illustrent le concept de l'invention qui consiste à prévoir une traverse avec plusieurs marches de hauteur différente, au niveau de sa surface supérieure, permettant de représenter divers points d'accueil adaptés à des pavillons de géométrie différente. La traverse a été illustrée avec trois marches dans le mode d'exécution présenté mais le concept de l'invention s'applique à toutes traverses comprenant au moins deux marches, la réalisation la plus avantageuse consistant à choisir au moins trois marches.These previous figures illustrate the concept of the invention which consists in providing a cross with several steps of different height, at its upper surface, to represent various reception points adapted to pavilions of different geometry. The crossbar has been illustrated with three steps in the embodiment shown but the concept of the invention applies to all sleepers comprising at least two steps, the most advantageous embodiment of choosing at least three steps.
De plus, la traverse n'étant plus emboutie classiquement et obtenue par la réunion de deux pièces par soudure, elle ne présente plus les feuillures de l'art antérieur qui avaient l'inconvénient de nuire à la clarté de l'habitacle.In addition, the sleeper is no longer stamped classically and obtained by the union of two pieces by welding, it no longer has the rabbets of the prior art which had the disadvantage of damaging the clarity of the passenger compartment.
Finalement, elle présente une géométrie globalement modifiée, caractérisée par une forte réduction de la largeur I de sa section par rapport à l'art antérieur. Ainsi, ses performances en terme de clarté dans l'habitacle du véhicule sont grandement améliorées. L'obtention de la traverse selon l'invention par « roll forming » permet également d'utiliser des matériaux à Très Haute Limite Elastique , qui ne sont en général pas emboutissables. De ce point de vue, la traverse proposée permet également d'augmenter la tenue structurelle notamment lors d'un choc latéral.Finally, it has a globally modified geometry, characterized by a sharp reduction of the width I of its section compared to the prior art. Thus, its performance in terms of clarity in the cabin of the vehicle are greatly improved. Obtaining the cross member according to the invention by "roll forming" also allows the use of very high elastic limit materials, which are generally not stampable. From this point of view, the proposed cross member also makes it possible to increase the structural strength, in particular during a lateral impact.
Le procédé de fabrication de ces traverses permet d'obtenir un encombrement réduit pour une même performance mécanique par rapport aux traverses de l'art antérieur présentées précédemment en référence aux figures 1 et 2, performance notamment mesurée par son inertie et sa raideur. Cette solution est adaptée à la fois à la réalisation d'une traverse avant, d'une traverse centrale et d'une traverse arrière. Dans le cas de la fabrication de la traverse à partir d'un profilé, la différenciation entre traverse avant et centrale sera réalisée après l'étape de cintrage commune aux deux traverses, par une étape supplémentaire de galbage pour la traverse avant seulement. De plus, la fonction masse acoustique peut être réalisée par l'insertion d'une masse dans le corps creux après le formage ou par une tôle de forte épaisseur popée sur la face inférieure du corps creux.The method of manufacturing these crosspieces provides a reduced footprint for the same mechanical performance compared to the sleepers of the prior art presented above with reference to Figures 1 and 2, performance particularly measured by its inertia and stiffness. This solution is suitable both for the realization of a front cross member, a central cross member and a rear cross member. In the case of the manufacture of the cross member from a profile, the differentiation between the front cross member and central will be carried out after the bending step common to the two crosspieces, by an additional step of shaping for the front crossbar only. In addition, the acoustic mass function can be achieved by inserting a mass in the hollow body after forming or by a thick sheet populated on the underside of the hollow body.
La figure 6 représente une vue en perspective d'une portion de traverse avant 1 1 selon l'invention, obtenue à partir d'un tube hydroformé ou d'un profilé cintré galbé, dont la surface supérieure présente bien les trois marches 12, 13, 14, qui sont disposées dans un ordre de l'arrière vers l'avant dans la direction longitudinale d'un véhicule sur lequel la traverse 1 1 est montée, pour former des points d'accueil de hauteur différente afin de permettre la fixation de plusieurs pavillons de nature différente, tel que décrit précédemment. L'invention porte aussi sur un procédé de fixation d'une traverse sur des montants de baie, soit un procédé de fabrication d'une carrosserie automobile. La solution, illustrée sur la figure 7, repose sur la fixation d'une tôle rapportée 23 par des points de soudure par résistance ou clinchage 24 sur l'extrémité de la traverse 1 1 en vue de sa fixation sur un montant de baie 3 et/ou un brancard 4. La configuration finale après fixation est illustrée sur la figure 8. L'avantage de ce type de fixation est de permettre l'adaptation de la traverse avec un montant de baie et/ou un brancard classique, et d'assurer la continuité de la piste de collage, essentielle dans le cas du toit en verre.FIG. 6 represents a perspective view of a front cross member portion 1 1 according to the invention, obtained from a hydroformed tube or a curved curved profile, the upper surface of which has the three steps 12, 13 14, which are arranged in an order from the rear towards the front in the longitudinal direction of a vehicle on which the crossmember 11 is mounted, to form reception points of different height in order to allow the fixing of several pavilions of different nature, as described above. The invention also relates to a method of attaching a cross member to rack struts, a method of manufacturing a car body. The solution, illustrated in FIG. 7, is based on the fixing of an attached sheet 23 by resistance or clinching weld points 24 on the end of the cross member 11 with a view to its attachment to an amount of rack 3 and / or a stretcher 4. The final configuration after fixing is illustrated in Figure 8. The advantage of this type of attachment is to allow the adaptation of the cross with a rack amount and / or a conventional stretcher, and ensure the continuity of the gluing path, which is essential in the case of the glass roof.
Une telle solution atteint donc bien les objets recherchés et présente les avantages suivants :Such a solution therefore achieves the desired objects and has the following advantages:
-elle est économique car une traverse unique est multifonctions, c'est à dire est compatible avec toutes les variantes de pavillons. Cela permet la fabrication d'une série de véhicules ayant tous la même traverse mais différents pavillons ;it is economical because a single cross is multifunctional, ie is compatible with all variants of flags. This allows the manufacture of a series of vehicles all having the same cross but different flags;
-elle permet l'amélioration de la clarté de l'habitacle grâce à la combinaison des deux caractéristiques suivantes : -sa dimension I dans la direction longitudinale du véhicule est réduite, notamment grâce à la suppression des feuillures, ce qui réduit son encombrement et son obstruction de la lumière dans les cas avec toits en verre, ouvrants ou pas, etit allows the improvement of the clarity of the passenger compartment thanks to the combination of the following two characteristics: its dimension I in the longitudinal direction of the vehicle is reduced, in particular thanks to the removal of the rabbets, which reduces its bulk and its obstruction of light in cases with glass roofs, opening or not, and
-d'autre part, elle présente des points d'accueil du toit positionnés sur sa surface supérieure, avancés par rapport aux solutions de l'art antérieur, ce qui permet d'avancer le positionnement d'éléments qui cachent la lumière comme le support 17 d'un toit ouvrant, ce qui améliore aussi la clarté de l'habitacle ; -elle présente des propriétés mécaniques satisfaisantes, est compatible avec les structures de carrosserie habituelles ;on the other hand, it has roof receiving points positioned on its upper surface which are advanced with respect to the solutions of the prior art, which makes it possible to advance the positioning of elements which hide the light as the support. 17 of a sunroof, which also improves the clarity of the cabin; it has satisfactory mechanical properties, is compatible with the usual bodywork structures;
-Son procédé de fabrication permet d'obtenir des formes complexes, avec une bonne fiabilité, ces formes étant facilement reproductibles pour fabriquer des grandes séries de véhicules.Its manufacturing process makes it possible to obtain complex shapes with good reliability, these forms being easily reproducible for manufacturing large series of vehicles.
L'invention a été illustrée dans le cadre d'une traverse avant de liaison pavillon / pare brise mais pourrait être implémentée dans le cadre d'une traverse arrière, un système de marches sur la partie avant de sa surface supérieure permettant aussi d'accueillir plusieurs pavillons différents. The invention has been illustrated in the context of a front cross link flag / windshield but could be implemented in the context of a rear cross, a system of steps on the front of its upper surface also to accommodate several different pavilions.

Claims

Revendications claims
1. Procédé de fabrication d'une traverse (1 1 ) de carrosserie de véhicule automobile caractérisé en ce qu'il comprend une étape d'hydroformage d'un tube métallique.1. A method of manufacturing a cross member (1 1) of a motor vehicle body characterized in that it comprises a step of hydroforming a metal tube.
2. Procédé de fabrication d'une traverse de carrosserie de véhicule automobile caractérisé en ce qu'il comprend une étape de profilage sur galets d'un élément métallique puis une étape de cintrage du profilé obtenu.2. A method of manufacturing a bodywork cross member of a motor vehicle characterized in that it comprises a profiling step on rollers of a metal element and a bending step of the profile obtained.
3. Procédé de fabrication d'une traverse de carrosserie de véhicule automobile selon la revendication précédente caractérisé en ce qu'il comprend en outre une étape de galbage du profilé.3. A method of manufacturing a bodywork cross member of a motor vehicle according to the preceding claim characterized in that it further comprises a profiling step of the profile.
4. Procédé de fabrication d'une carrosserie automobile, caractérisé en ce qu'il comprend une étape de fabrication d'une traverse selon un procédé selon l'une des revendications 1 à 3 puis une étape de fixation d'une tôle rapportée (23) par des points de soudure par résistance ou clinchage (24) sur l'extrémité de la traverse (1 1 ) en vue de sa fixation sur un montant de baie (3).4. A method of manufacturing an automobile body, characterized in that it comprises a step of manufacturing a cross member according to a method according to one of claims 1 to 3 and a step of fixing a reported sheet metal (23). ) by resistance welding or clinching points (24) on the end of the crossmember (1 1) for attachment to a bay post (3).
5. Traverse de pavillon de véhicule automobile caractérisée en ce qu'elle se présente comme un tube hydroformé ou un profilé, sans feuillure, obtenue par un procédé de fabrication selon l'une des revendications 1 à 3, et en ce qu'elle comprend une surface supérieure présentant plusieurs marches pour former des zones d'accueil de pavillon à des hauteurs différentes afin de pouvoir recevoir plusieurs types de pavillons différents. 5. A motor vehicle roof crosspiece characterized in that it is a hydroformed tube or profile, without rabbet, obtained by a manufacturing method according to one of claims 1 to 3, and in that it comprises an upper surface having a plurality of steps for forming flag receiving areas at different heights in order to receive several different types of flags.
6. Traverse de pavillon de véhicule automobile selon la revendication 5, caractérisée en ce qu'elle est une traverse avant ou centrale de véhicule qui comprend une première marche (12) dans la partie arrière de sa surface supérieure pour recevoir une cassette (17) de toit ouvrant (20), une seconde marche (14) dans sa partie antérieure pour recevoir une portion basse (21 ) de toit en tôle (20') et pour recevoir l'extrémité supérieure d'un pare brise (15).Motor vehicle roof cross member according to claim 5, characterized in that it is a front cross member or central vehicle which comprises a first step (12) in the rear portion of its upper surface for receiving a cassette (17). sunroof (20), a second step (14) in its front portion for receiving a lower portion (21) of sheet metal roof (20 ') and for receiving the upper end of a windshield (15).
7. Traverse de pavillon de véhicule automobile selon la revendication précédente, caractérisée en ce qu'elle comprend une troisième marche7. roof cross member of a motor vehicle according to the preceding claim, characterized in that it comprises a third step
(13) centrale apte à recevoir le collage d'un toit en verre fixe (20").(13) central capable of receiving the bonding of a fixed glass roof (20 ").
8. Traverse de pavillon de véhicule automobile selon la revendication précédente, caractérisée en ce qu'elle comprend depuis l'arrière vers l'avant de la traverse (1 1 ) une marche (12) de hauteur la plus basse apte à la fixation d'un support (17) de toit en verre ouvrant, une marche (13) la plus haute apte à la fixation d'un toit en verre (20") et au moins une autre marche (14) apte à la fixation d'un toit en tôle (20').8. roof cross member of a motor vehicle according to the preceding claim, characterized in that it comprises from the rear to the front of the cross member (1 1) a step (12) of the lowest height suitable for fixing the an opening glass roof support (17), an upper step (13) suitable for fixing a glass roof (20 ") and at least one other step (14) suitable for attaching a sheet metal roof (20 ').
9. Véhicule automobile comprenant une traverse selon l'une des revendications 5 à 8.9. Motor vehicle comprising a cross member according to one of claims 5 to 8.
10. Série de véhicules automobiles caractérisée en ce qu'elle comprend des véhicules avec des pavillons différents, du type comprenant des toits ouvrants, des toits en verre et des toits en tôle et en ce que tous les véhicules de la série comprennent la même traverse avant ou centrale (1 1 ) selon l'une des revendications 5 à 8. 10. Series of motor vehicles characterized in that it comprises vehicles with different flags, of the type comprising sunroofs, glass roofs and sheet metal roofs and in that all the vehicles of the series comprise the same cross front or central (1 1) according to one of claims 5 to 8.
PCT/FR2007/051045 2006-05-05 2007-03-30 Multifunction hydroformed or profiled roof cross member WO2007128927A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0604047A FR2900623A1 (en) 2006-05-05 2006-05-05 HYDROFORMED OR PROFILED MULTIFUNCTION PAVILLION TRAVERSE
FR0604047 2006-05-05

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WO2007128927A1 true WO2007128927A1 (en) 2007-11-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2932150B1 (en) * 2008-06-09 2010-06-18 Peugeot Citroen Automobiles Sa MOTOR VEHICLE COMPRISING A CENTRAL PAVILION ARM

Citations (4)

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Publication number Priority date Publication date Assignee Title
US5716155A (en) * 1993-09-16 1998-02-10 Honda Giken Kogyo Kabushiki Kaisha T-shaped connection frame
US20010000119A1 (en) * 1997-10-16 2001-04-05 Jaekel Federico G. Hydroformed space frame and joints therefor
EP0883542B1 (en) * 1996-02-26 2001-08-16 Volvo Car Corporation A vehicle body comprising a lower body part and an upper body part, as well as a method of manufacturing an upper body part for such vehicle body
WO2006092128A1 (en) * 2005-03-03 2006-09-08 Webasto Ag Vehicle body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5716155A (en) * 1993-09-16 1998-02-10 Honda Giken Kogyo Kabushiki Kaisha T-shaped connection frame
EP0883542B1 (en) * 1996-02-26 2001-08-16 Volvo Car Corporation A vehicle body comprising a lower body part and an upper body part, as well as a method of manufacturing an upper body part for such vehicle body
US20010000119A1 (en) * 1997-10-16 2001-04-05 Jaekel Federico G. Hydroformed space frame and joints therefor
WO2006092128A1 (en) * 2005-03-03 2006-09-08 Webasto Ag Vehicle body

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