WO2014202871A1 - Method for manufacturing a front cradle of a vehicle and front cradle of a vehicle obtained by said method - Google Patents

Method for manufacturing a front cradle of a vehicle and front cradle of a vehicle obtained by said method Download PDF

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Publication number
WO2014202871A1
WO2014202871A1 PCT/FR2014/051427 FR2014051427W WO2014202871A1 WO 2014202871 A1 WO2014202871 A1 WO 2014202871A1 FR 2014051427 W FR2014051427 W FR 2014051427W WO 2014202871 A1 WO2014202871 A1 WO 2014202871A1
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WO
WIPO (PCT)
Prior art keywords
central beam
horn
vehicle
cradle
front cradle
Prior art date
Application number
PCT/FR2014/051427
Other languages
French (fr)
Inventor
Eric Palpacuer
Frederic RIGUEL
Julien ROUET
Original Assignee
Peugeot Citroen Automobiles Sa
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 Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Priority to EP14735613.3A priority Critical patent/EP3010788A1/en
Priority to CN201480034829.1A priority patent/CN105392690A/en
Publication of WO2014202871A1 publication Critical patent/WO2014202871A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • B21K25/005—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components by friction heat forging
    • 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
    • B62D27/06—Connections between superstructure or understructure sub-units readily releasable
    • B62D27/065—Connections between superstructure or understructure sub-units readily releasable using screwthread
    • 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
    • B62D29/008—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of light alloys, e.g. extruded
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/106—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a self-piercing screw-point, i.e. without removing material

Definitions

  • the invention relates to a method of producing a cradle before a vehicle, in particular a motor vehicle.
  • the invention also relates to a vehicle front cradle obtained by such a method.
  • the engine cradle or "front cradle” of a motor vehicle connects and positions the front axle on the chassis of the vehicle through two front fasteners and two rear fasteners. Its geometry is designed to receive the functional links of the components of the front axle and the powertrain of the vehicle.
  • the Applicant has made a front cradle of a motor vehicle of the type comprising, on the one hand, a section obtained by extrusion, which extends in a longitudinal direction, and on the other hand, two parts called “connecting pieces", also obtained by extrusion, having the same extrusion direction as the profile, positioned and attached laterally to two opposite cross sections of the profile.
  • Each of the two connecting pieces is contiguous to the corresponding cross section of the profile via an outer surface contiguous to a corresponding outer surface of the profile.
  • the connecting pieces are fixed to the profile by welding, more precisely by two welding beads which extend, like the external connecting surfaces mentioned above, in the direction of extrusion.
  • the object of the present invention is to provide a method of producing a cradle before a motor vehicle, which provides a cradle that has the best possible mechanical strength.
  • Another object of the present invention is to provide such a method, which allows to significantly reduce (from 30 to 50%) the cradle function on a motor vehicle.
  • the present invention relates to a method of producing a cradle before a motor vehicle, the cradle being formed, on the one hand, a central beam, metallic, extending according to a longitudinal direction, and secondly, at least one metal connecting piece or "horn", which is positioned and attached to a longitudinal end of the central beam.
  • at least the horn is attached to the central beam by a plurality of screws called "fluo-drills screws" in the remainder of this text.
  • the central beam is made of aluminum or aluminum alloy, and said horn at least is also made of aluminum or aluminum alloy.
  • the central beam and the horn at least are made by a thermomechanical extrusion process.
  • the central beam and the horn at least can be made by extrusion, in the same direction of extrusion.
  • the fluo-drill screws are advantageously arranged aligned along lines parallel to said extrusion direction.
  • the at least one horn can be positioned and connected to the central beam via an outer planar surface of said horn contiguous to a corresponding outer planar surface of the central beam, said respective flat surfaces contiguous being oriented in the direction of extrusion.
  • the front cradle comprises two horns respectively connected to one and the other of the two longitudinal ends of the central beam.
  • the invention also relates to a vehicle front cradle, which is obtained according to the method described above in outline.
  • the invention finally relates to a vehicle, in particular a motor vehicle, which comprises such a front cradle.
  • FIGS. 1A to 1F schematically illustrate the stages or cycle of screwing a fluo-drill screw
  • FIG. 2 is a schematic perspective view of a front cradle of a motor vehicle, according to the present invention.
  • FIG. 3 is a diagrammatic perspective view of the left horn fixed on the central beam of the front cradle of FIG. 2, and
  • Figure 4 is a front sectional schematic view of the assembly of Figure 3 showing the left horn fixed on the central beam of the cradle.
  • FIG. 1A With reference to the drawing of Figures 1A to 1F, there is shown, very schematically, the principle of screwing, known per se, a screw fluo-drill, general reference 10, for fixing two parts to be assembled, referenced 1 and 2.
  • This screw 10 may be, for example, a screw EJOT ® Company, called screw FDS ® (acronym for the expression in English “Flow Drill Screw”, which can be translated into language French by the term “self-tapping screw”), known to allow the screwing of sheets of thickness up to 4 mm for aluminum without pre-drilling and, therefore, already used in automobile body assembly.
  • the screw comprises a head 10A, six-pointed star for example, a threaded portion 10C and a tip 10B, substantially shaped head shell.
  • the screwing is carried out using a robotic system in several steps, which are as follows.
  • the screw 10 firmly held at the end of a screwdriver by its head 10A, is positioned on the parts to be assembled 1 and 2, a cylinder (not shown) holding the plated assembly of the two parts 1 and 2.
  • An increase in the speed of rotation of the screwdriver causes heating (Figure 1 A) and penetration (Figure 1 B) of the screw 10 in the assembly 1, 2.
  • the axial force to effect the formation of the "flat” referenced “C” Figure 1 C).
  • the tapping in the "flat” is formed ( Figure 1 D), the rotational speed and the axial force are reduced.
  • the screwing continues (Figure 1 E) until the head 10A of the screw 10 rests on the part 1 to be tightened.
  • the operation ends with a tightening to the desired torque (Figure 1 F).
  • the temperature required for the formation of "punctured" is obtained thanks to a high speed of rotation of the screwdriver can reach a speed of the order of 5000 revolutions per minute and a axial force of up to 1800 newtons depending on the nature and thickness of the material.
  • This type of screwing is an easily “robotisable” operation, which lasts about 3 seconds after the positioning of the screw. Tapping generated without chips during the screwing process is compatible with a metric thread; it allows, thus, a possible repair.
  • this type of screwing allows a very efficient assembly, compared to the various assemblies, known from the prior art, such as assembly by semi-tubular rivets or complete, assembly by clinched or crimped points, the laser spot welding or MIG welding (acronym for the English expression "Metal Inert Gas” which may be translated into French as “metal under inert gas”), or the assembly by threaded bolts or bolts, etc.
  • the front cradle of a motor vehicle is an aluminum cradle composed of three sections:
  • a central beam, of general reference 100 which extends in a longitudinal direction "Y" which is the transverse direction of the vehicle;
  • the two horns 200 and 300 are projecting before the central beam 100, the reference 200 designating the right horn and the reference 300 the left horn.
  • the two horns 200 and 300 have different profiles, are not symmetrical, and extend transversely and longitudinally to the longitudinal direction "X" of the vehicle ( Figure 3). It goes without saying that, in a variant and without departing from the scope of the present invention, the horns could be identical and symmetrical or be in a larger number by including, for example, connecting pieces of the anti-roll bar bearings, accessories for holding the exhaust lines, etc.
  • the central beam 100 and the two horns 200 and 300 are made by a thermomechanical extrusion process. Conventionally, a long product, flat or tubular, is formed continuously, by passing the compressed aluminum in an extrusion die having the section of the part to obtain.
  • the extruded central beam 100 and the two extruded horns 200 and 300 have the same extrusion direction, which corresponds to the axis "Y" mentioned above so as to promote the absorption of energy in a frontal collision of the vehicle.
  • a horn namely the left horn 300, formed as the right horn and the central beam of different walls including, on the one hand walls constituting an outer contour, such for example the walls 301, 302, 303, 304 and 305 for example, and on the other hand, walls constituting internal webs which delimit polyhedra within the outer contour, such as the walls 310 and 31 1, for example.
  • the walls 307 and 308 have external junction interface surfaces which are contiguous with the corresponding junction interface outer surfaces of the walls 107 and 108 of the central beam. The orientation of these surfaces forming the junction interface promotes a transmission of forces between the horn 300 and the central beam 100 along the longitudinal axis of the vehicle.
  • junction interface surfaces extend in planes parallel to the longitudinal direction "Y" of the cradle.
  • the horn 300, positioned on the central beam 100 according to the aforementioned interface surfaces, is then fixed on the beam 100 by means of a plurality of fluo-drill screws collectively designated by the reference 50 i.
  • fluo-drill screws previously described in their structure and their method of screwing (FIGS. 1A to 1F), are arranged aligned on lines parallel to said extrusion direction, such as the lines L 1 and L 2 of FIG. Figure 3.
  • the number and position of the fluo-drill screws 50i are determined by calculation, in a manner known per se, depending on the structure and shape of the beam and the connecting horn, of to obtain the best possible mechanical strength.
  • the assembly of the beam and horns could be achieved either by fluo-drills screws but by rivets.
  • the method described above for producing a front cradle of a motor vehicle has the advantage of being a simple manufacturing process, to offer a significant gain in mass of the resulting cradle and to exploit the maximum mechanical characteristics of extruded aluminum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The invention relates to a method for manufacturing a front cradle of a vehicle. The cradle is made up of a metal backbone (100) extending in a longitudinal direction, and at least one metal linking part or "horn" (300), which is positioned at and attached to a longitudinal end of the backbone chassis (100). At least the horn (300) is attached to the backbone chassis (100) by a plurality of "flow drill" screws (50i).

Description

PROCEDE DE REALISATION D'UN BERCEAU AVANT DE VEHICULE, ET BERCEAU AVANT DE VEHICULE OBTENU PAR CE PROCEDE.  METHOD FOR MAKING A FRONT CABLE FOR A VEHICLE, AND FRONT CABLE FOR A VEHICLE OBTAINED BY THIS METHOD.
[0001 ] L'invention porte sur un procédé de réalisation d'un berceau avant de véhicule, en particulier de véhicule automobile. L'invention porte également sur un berceau avant de véhicule obtenu par un tel procédé. The invention relates to a method of producing a cradle before a vehicle, in particular a motor vehicle. The invention also relates to a vehicle front cradle obtained by such a method.
[0002] Le berceau moteur ou « berceau avant » d'un véhicule automobile relie et positionne le train avant sur le châssis du véhicule par l'intermédiaire de deux fixations avant et de deux fixations arrière. Sa géométrie est conçue pour recevoir les liaisons fonctionnelles des organes du train avant et du groupe motopropulseur du véhicule. The engine cradle or "front cradle" of a motor vehicle connects and positions the front axle on the chassis of the vehicle through two front fasteners and two rear fasteners. Its geometry is designed to receive the functional links of the components of the front axle and the powertrain of the vehicle.
[0003] Les berceaux avant des véhicules automobiles actuels sont le plus souvent réalisés en fonderie, ou bien assemblés par soudure. [0003] The cradles before current motor vehicles are most often made in the foundry, or welded together.
[0004] On a déjà réalisé également des berceaux de véhicule en aluminium par un procédé thermomécanique d'extrusion. [0004] Aluminum vehicle cradles have already been realized by a thermomechanical extrusion process.
[0005] A titre d'exemple, la Demanderesse a réalisé un berceau avant de véhicule automobile du type comprenant, d'une part, un profilé obtenu par extrusion, qui s'étend suivant une direction longitudinale, et d'autre part, deux pièces dites « pièces de liaison », obtenues également par extrusion, présentant une même direction d'extrusion que le profilé, positionnées et fixées latéralement à deux sections transversales opposées du profilé. Chacune des deux pièces de liaison est accolée à la section transversale correspondante du profilé par l'intermédiaire d'une surface extérieure accolée à une surface extérieure correspondante du profilé. Les pièces de liaison sont fixées au profilé par soudure, plus précisément par deux cordons de soudure qui s'étendent, comme les surfaces extérieures de liaison mentionnées précédemment, selon la direction d'extrusion. By way of example, the Applicant has made a front cradle of a motor vehicle of the type comprising, on the one hand, a section obtained by extrusion, which extends in a longitudinal direction, and on the other hand, two parts called "connecting pieces", also obtained by extrusion, having the same extrusion direction as the profile, positioned and attached laterally to two opposite cross sections of the profile. Each of the two connecting pieces is contiguous to the corresponding cross section of the profile via an outer surface contiguous to a corresponding outer surface of the profile. The connecting pieces are fixed to the profile by welding, more precisely by two welding beads which extend, like the external connecting surfaces mentioned above, in the direction of extrusion.
[0006] Toutefois, ce procédé d'assemblage par le moyen de soudures présente l'inconvénient de ne pas permettre une exploitation maximale des caractéristiques mécaniques de l'aluminium extrudé. L'échauffement résultant de la fusion du métal d'apport de la soudure divise localement par deux la résistance de la matière. [0007] Le but de la présente invention est de fournir un procédé de réalisation d'un berceau avant de véhicule automobile, qui permette d'obtenir un berceau qui présente la meilleure tenue mécanique possible. However, this method of assembly by means of welds has the disadvantage of not allowing maximum exploitation of the mechanical characteristics of extruded aluminum. The heating resulting from the fusion of the weld filler metal locally divides the resistance of the material locally. The object of the present invention is to provide a method of producing a cradle before a motor vehicle, which provides a cradle that has the best possible mechanical strength.
[0008] Un autre but de la présente invention est de fournir un tel procédé, qui permette d'alléger fortement (de 30 à 50 %) la fonction berceau sur un véhicule automobile. Another object of the present invention is to provide such a method, which allows to significantly reduce (from 30 to 50%) the cradle function on a motor vehicle.
[0009] C'est également un but de la présente invention de fournir un berceau avant de véhicule automobile, qui soit de conception et de fabrication simples, qui soit fiable et économique. It is also an object of the present invention to provide a front cradle of a motor vehicle, which is simple design and manufacturing, which is reliable and economical.
[0010] Pour parvenir à ces buts, la présente invention a pour objet un procédé de réalisation d'un berceau avant de véhicule automobile, le berceau étant formé, d'une part, d'une poutre centrale, métallique, s'étendant selon une direction longitudinale, et d'autre part, d'au moins une pièce de liaison métallique ou « corne », qui est positionnée et fixée à une extrémité longitudinale de la poutre centrale. Dans ce procédé nouveau, la corne au moins est fixée à la poutre centrale par une pluralité de vis dites « vis fluo-perceuses » dans la suite du présent texte. To achieve these aims, the present invention relates to a method of producing a cradle before a motor vehicle, the cradle being formed, on the one hand, a central beam, metallic, extending according to a longitudinal direction, and secondly, at least one metal connecting piece or "horn", which is positioned and attached to a longitudinal end of the central beam. In this new method, at least the horn is attached to the central beam by a plurality of screws called "fluo-drills screws" in the remainder of this text.
[001 1 ] Selon un mode préféré de réalisation de l'invention, la poutre centrale est réalisée en aluminium ou en alliage d'aluminium, et ladite corne au moins est également réalisée en aluminium ou alliage d'aluminium. [001 1] According to a preferred embodiment of the invention, the central beam is made of aluminum or aluminum alloy, and said horn at least is also made of aluminum or aluminum alloy.
[0012] Selon un mode préféré de réalisation de l'invention également, la poutre centrale et la corne au moins sont réalisées par un procédé thermomécanique d'extrusion. According to a preferred embodiment of the invention also, the central beam and the horn at least are made by a thermomechanical extrusion process.
[0013] De préférence, la poutre centrale et la corne au moins peuvent être réalisées par extrusion, selon la même direction d'extrusion. Preferably, the central beam and the horn at least can be made by extrusion, in the same direction of extrusion.
[0014] Les vis fluo-perceuses sont avantageusement disposées alignées selon des lignes parallèles à ladite direction d'extrusion. The fluo-drill screws are advantageously arranged aligned along lines parallel to said extrusion direction.
[0015] De manière préférentielle, la corne au moins peut être positionnée et reliée à la poutre centrale par l'intermédiaire d'une surface plane externe de ladite corne accolée à une surface plane externe correspondante de la poutre centrale, lesdites surfaces planes respectivement accolées étant orientées selon la direction d'extrusion. [0016] Selon un mode particulier de réalisation de l'invention, le berceau avant comporte deux cornes reliées respectivement à l'une et à l'autre des deux extrémités longitudinales de la poutre centrale. Preferably, the at least one horn can be positioned and connected to the central beam via an outer planar surface of said horn contiguous to a corresponding outer planar surface of the central beam, said respective flat surfaces contiguous being oriented in the direction of extrusion. According to a particular embodiment of the invention, the front cradle comprises two horns respectively connected to one and the other of the two longitudinal ends of the central beam.
[0017] L'invention a également pour objet un berceau avant de véhicule, qui est obtenu selon le procédé décrit ci-dessus dans ses grandes lignes. The invention also relates to a vehicle front cradle, which is obtained according to the method described above in outline.
[0018] L'invention a enfin pour objet un véhicule, en particulier un véhicule automobile, qui comporte un tel berceau avant. The invention finally relates to a vehicle, in particular a motor vehicle, which comprises such a front cradle.
[0019] D'autres buts, avantages et caractéristiques de l'invention apparaîtront dans la description qui suit d'un exemple de réalisation, non limitatif de l'objet et de la portée de la présente demande de brevet, accompagnée de dessins dans lesquels : Other objects, advantages and features of the invention will appear in the following description of an exemplary embodiment, not limiting the object and scope of the present patent application, accompanied by drawings in which :
[0020] - les figures 1 A à 1 F illustrent, de manière schématique, les étapes ou cycle de vissage d'une vis fluo-perceuse, [0020] FIGS. 1A to 1F schematically illustrate the stages or cycle of screwing a fluo-drill screw,
[0021 ] - la figure 2 est une vue en perspective, schématique, d'un berceau avant de véhicule automobile, selon la présente invention, [0021] FIG. 2 is a schematic perspective view of a front cradle of a motor vehicle, according to the present invention,
[0022] - la figure 3 est une vue en perspective, schématique, de la corne gauche fixée sur la poutre centrale du berceau avant de la figure 2, et FIG. 3 is a diagrammatic perspective view of the left horn fixed on the central beam of the front cradle of FIG. 2, and
[0023] - la figure 4 est une vue en coupe frontale, schématique, de l'assemblage de la figure 3 montrant la corne gauche fixée sur la poutre centrale du berceau. - Figure 4 is a front sectional schematic view of the assembly of Figure 3 showing the left horn fixed on the central beam of the cradle.
[0024] En référence au dessin des figures 1 A à 1 F, on a représenté, très schématiquement, le principe de vissage, connu en soi, d'une vis fluo-perceuse, de référence générale 10, pour la fixation de deux pièces à assembler, référencées 1 et 2. Cette vis 10 peut être, par exemple, une vis de la Société EJOT®, dite vis FDS® (acronyme de l'expression en langue anglaise « Flow Drill Screw », qui peut se traduire en langue française par l'expression « Vis auto-taraudeuse »), connue pour permettre le vissage de tôles d'épaisseur jusqu'à 4 mm pour l'aluminium sans pré perçage et, de ce fait, déjà utilisée en assemblage de carrosserie automobile. La vis comporte une tête 10A, en étoile à six branches par exemple, une partie filetée 10C et une pointe 10B, en forme sensiblement de tête d'obus. Le vissage est réalisé à l'aide d'un système robotisé en plusieurs étapes, qui sont les suivantes. La vis 10, fermement maintenue en bout d'une visseuse par sa tête 10A, est positionnée sur les pièces à assembler 1 et 2, un vérin (non représenté) maintenant l'ensemble plaqué des deux pièces 1 et 2. Une augmentation de la vitesse de rotation de la visseuse provoque réchauffement (figure 1 A) et la pénétration (figure 1 B) de la vis 10 dans l'assemblage 1 , 2. L'effort axial à pour effet la formation du « crevé » référencé « C » (figure 1 C). Une fois le couple de vissage atteint, le taraudage dans le « crevé » est formé (figure 1 D), la vitesse de rotation et l'effort axial sont réduits. Le vissage se poursuit (figure 1 E) jusqu'à ce que la tête 10A de la vis 10 repose sur la pièce 1 à serrer. L'opération se termine par un serrage au couple souhaité (figure 1 F). With reference to the drawing of Figures 1A to 1F, there is shown, very schematically, the principle of screwing, known per se, a screw fluo-drill, general reference 10, for fixing two parts to be assembled, referenced 1 and 2. This screw 10 may be, for example, a screw EJOT ® Company, called screw FDS ® (acronym for the expression in English "Flow Drill Screw", which can be translated into language French by the term "self-tapping screw"), known to allow the screwing of sheets of thickness up to 4 mm for aluminum without pre-drilling and, therefore, already used in automobile body assembly. The screw comprises a head 10A, six-pointed star for example, a threaded portion 10C and a tip 10B, substantially shaped head shell. The screwing is carried out using a robotic system in several steps, which are as follows. The screw 10, firmly held at the end of a screwdriver by its head 10A, is positioned on the parts to be assembled 1 and 2, a cylinder (not shown) holding the plated assembly of the two parts 1 and 2. An increase in the speed of rotation of the screwdriver causes heating (Figure 1 A) and penetration (Figure 1 B) of the screw 10 in the assembly 1, 2. The axial force to effect the formation of the "flat" referenced "C" (Figure 1 C). Once the tightening torque is reached, the tapping in the "flat" is formed (Figure 1 D), the rotational speed and the axial force are reduced. The screwing continues (Figure 1 E) until the head 10A of the screw 10 rests on the part 1 to be tightened. The operation ends with a tightening to the desired torque (Figure 1 F).
[0025] On notera que, de façon connue en soi, la température nécessaire à la formation du « crevé » est obtenue grâce à une vitesse de rotation élevée de la visseuse pouvant atteindre une vitesse de l'ordre de 5000 tours par minute et un effort axial pouvant atteindre 1800 newtons selon la nature et l'épaisseur du matériau. Note that, in a manner known per se, the temperature required for the formation of "punctured" is obtained thanks to a high speed of rotation of the screwdriver can reach a speed of the order of 5000 revolutions per minute and a axial force of up to 1800 newtons depending on the nature and thickness of the material.
[0026] Ce type de vissage constitue une opération facilement « robotisable », qui dure de l'ordre de 3 secondes après le positionnement de la vis. Le taraudage généré sans copeaux pendant le processus de vissage est compatible avec un filet métrique ; il permet, ainsi, une éventuelle réparation. De plus, ce type de vissage permet un assemblage très performant, en comparaison des assemblages divers, connus de l'art antérieur, tels que l'assemblage par rivets semi-tubulaires ou complets, l'assemblage par points clinchés ou sertis, l'assemblage par points de soudure laser ou soudure MIG (acronyme de l'expression en langue anglaise « Métal Inert Gas » qui peut se traduire en langue française par « Métal sous gaz inerte »), ou encore l'assemblage par vis ou boulons filetés, etc. This type of screwing is an easily "robotisable" operation, which lasts about 3 seconds after the positioning of the screw. Tapping generated without chips during the screwing process is compatible with a metric thread; it allows, thus, a possible repair. In addition, this type of screwing allows a very efficient assembly, compared to the various assemblies, known from the prior art, such as assembly by semi-tubular rivets or complete, assembly by clinched or crimped points, the laser spot welding or MIG welding (acronym for the English expression "Metal Inert Gas" which may be translated into French as "metal under inert gas"), or the assembly by threaded bolts or bolts, etc.
[0027] Comme représenté sur le dessin de la figure 2, le berceau avant de véhicule automobile selon l'invention est un berceau en aluminium composé de trois profilés : As shown in the drawing of Figure 2, the front cradle of a motor vehicle according to the invention is an aluminum cradle composed of three sections:
[0028] - une poutre centrale, de référence générale 100, qui s'étend selon une direction longitudinale « Y » qui est la direction transversale du véhicule, et A central beam, of general reference 100, which extends in a longitudinal direction "Y" which is the transverse direction of the vehicle; and
[0029] - deux pièces de liaison, appelées « cornes » dans le présent texte, référencées respectivement 200 et 300, qui sont positionnées et fixées respectivement à l'une et à l'autre des deux extrémités longitudinales de la poutre centrale 100 et permettent de relier le berceau sur les longerons droite et gauche (non représentés) de la caisse du véhicule. [0030] Les deux cornes 200 et 300 sont en saillie avant de la poutre centrale 100, la référence 200 désignant la corne droite et la référence 300 la corne gauche. Two connecting pieces, called "horns" in the present text, respectively referenced 200 and 300, which are positioned and fixed respectively to one and the other of the two longitudinal ends of the central beam 100 and allow to connect the cradle on the left and right side members (not shown) of the vehicle body. The two horns 200 and 300 are projecting before the central beam 100, the reference 200 designating the right horn and the reference 300 the left horn.
[0031 ] Les deux cornes 200 et 300 ont des profils différents, ne sont pas symétriques, et s'étendent transversalement et longitudinalement à la direction longitudinale « X » du véhicule (figure 3). Il va de soi, qu'en variante et sans sortir du cadre de la présente invention, les cornes pourraient être identiques et symétriques ou bien être en nombre supérieur en comprenant, par exemple, des pièces de liaison des paliers de barre anti-devers, des accessoires de maintien des suspentes d'échappement, etc. The two horns 200 and 300 have different profiles, are not symmetrical, and extend transversely and longitudinally to the longitudinal direction "X" of the vehicle (Figure 3). It goes without saying that, in a variant and without departing from the scope of the present invention, the horns could be identical and symmetrical or be in a larger number by including, for example, connecting pieces of the anti-roll bar bearings, accessories for holding the exhaust lines, etc.
[0032] La poutre centrale 100 et les deux cornes 200 et 300 sont réalisées par un procédé thermomécanique d'extrusion. De façon classique, un produit long, plat ou tubulaire, est formé en continu, par passage de l'aluminium compressé dans une filière d'extrusion ayant la section de la pièce à obtenir. The central beam 100 and the two horns 200 and 300 are made by a thermomechanical extrusion process. Conventionally, a long product, flat or tubular, is formed continuously, by passing the compressed aluminum in an extrusion die having the section of the part to obtain.
[0033] En position dans le berceau, la poutre centrale extrudée 100 et les deux cornes extrudées 200 et 300 présentent une même direction d'extrusion, qui correspond à l'axe « Y » mentionné précédemment de façon à favoriser l'absorption d'énergie lors d'une collision frontale du véhicule. In position in the cradle, the extruded central beam 100 and the two extruded horns 200 and 300 have the same extrusion direction, which corresponds to the axis "Y" mentioned above so as to promote the absorption of energy in a frontal collision of the vehicle.
[0034] En référence au dessin de la figure 3, on a représenté de manière plus détaillée une corne, à savoir la corne de gauche 300, formée, comme la corne de droite et la poutre centrale de différentes parois incluant, d'une part, des parois constituant un contour extérieur, telles par exemple les parois 301 , 302, 303, 304 et 305 par exemple, et d'autre part, des parois constituant des voiles internes qui délimitent des polyèdres à l'intérieur du contour extérieur, telles les parois 310 et 31 1 , par exemple. Referring to the drawing of Figure 3, there is shown in more detail a horn, namely the left horn 300, formed as the right horn and the central beam of different walls including, on the one hand walls constituting an outer contour, such for example the walls 301, 302, 303, 304 and 305 for example, and on the other hand, walls constituting internal webs which delimit polyhedra within the outer contour, such as the walls 310 and 31 1, for example.
[0035] En référence à la figure 4, les parois 307 et 308 présentent des surfaces externes d'interface de jonction, qui sont accolées aux surfaces externes d'interface de jonction correspondantes des parois 107 et 108 de la poutre centrale. L'orientation de ces surfaces formant l'interface de jonction favorise une transmission des efforts entre la corne 300 et la poutre centrale 100 suivant l'axe longitudinal du véhicule. With reference to FIG. 4, the walls 307 and 308 have external junction interface surfaces which are contiguous with the corresponding junction interface outer surfaces of the walls 107 and 108 of the central beam. The orientation of these surfaces forming the junction interface promotes a transmission of forces between the horn 300 and the central beam 100 along the longitudinal axis of the vehicle.
[0036] On notera que ces surfaces d'interface de jonction s'étendent dans des plans parallèles à la direction longitudinale « Y » du berceau. [0037] La corne 300, positionnée sur la poutre centrale 100 selon les surfaces d'interface mentionnées précédemment, est alors fixée sur la poutre 100 par l'intermédiaire d'une pluralité de vis fluo-perceuses désignées collectivement par la référence 50 i. Note that these junction interface surfaces extend in planes parallel to the longitudinal direction "Y" of the cradle. The horn 300, positioned on the central beam 100 according to the aforementioned interface surfaces, is then fixed on the beam 100 by means of a plurality of fluo-drill screws collectively designated by the reference 50 i.
[0038] Ces vis fluo-perceuses, décrites précédemment dans leur structure et leur mode de vissage (figures 1 A à 1 F), sont disposées alignées sur des lignes parallèles à ladite direction d'extrusion, telles les lignes l_i et L2 de la figure 3. These fluo-drill screws, previously described in their structure and their method of screwing (FIGS. 1A to 1F), are arranged aligned on lines parallel to said extrusion direction, such as the lines L 1 and L 2 of FIG. Figure 3.
[0039] Il va de soi que le nombre et la position des vis fluo-perceuses 50i sont déterminés par calcul, de manière connue en soi, en fonction de la structure et de la forme de la poutre et de la corne de liaison, de façon à obtenir la meilleure tenue mécanique possible. It goes without saying that the number and position of the fluo-drill screws 50i are determined by calculation, in a manner known per se, depending on the structure and shape of the beam and the connecting horn, of to obtain the best possible mechanical strength.
[0040] Selon une variante de réalisation de l'invention, l'assemblage de la poutre et des cornes pourrait être réalisé non plus par des vis fluo-perceuses mais par des rivets. According to an alternative embodiment of the invention, the assembly of the beam and horns could be achieved either by fluo-drills screws but by rivets.
[0041 ] Le procédé décrit ci-dessus de réalisation d'un berceau avant de véhicule automobile présente l'avantage d'être un procédé de fabrication simple, d'offrir un important gain en masse du berceau résultant et d'exploiter au maximum les caractéristiques mécaniques de l'aluminium extrudé. The method described above for producing a front cradle of a motor vehicle has the advantage of being a simple manufacturing process, to offer a significant gain in mass of the resulting cradle and to exploit the maximum mechanical characteristics of extruded aluminum.

Claims

Revendications : Claims:
1 . Procédé de réalisation d'un berceau avant de véhicule automobile, ledit berceau étant formé d'une poutre centrale (100), métallique, s'étendant selon une direction transversale (« Y »), et au moins une pièce de liaison métallique ou « corne » (300), qui est positionnée et fixée à une extrémité longitudinale de la poutre centrale (100), la corne au moins (300) étant fixée à la poutre centrale (100) par une pluralité de vis « fluo-perceuses » (50i), la poutre centrale (100) étant réalisée en aluminium ou en alliage d'aluminium, la poutre centrale (100) et la corne au moins (300) étant réalisées par extrusion selon la même direction d'extrusion (« Y »), caractérisé en ce que les vis fluo perceuses (50i) sont disposées alignées sur des lignes parallèles (L1 ; L2) à ladite direction d'extrusion. 1. A method of producing a front cradle of a motor vehicle, said cradle being formed of a central beam (100), metallic, extending in a transverse direction ("Y"), and at least one metal connecting piece or " horn (300), which is positioned and fixed at a longitudinal end of the central beam (100), the at least one horn (300) being fixed to the central beam (100) by a plurality of "fluo-drill" screws ( 50i), the central beam (100) being made of aluminum or aluminum alloy, the central beam (100) and the at least one horn (300) being made by extrusion in the same extrusion direction ("Y") , characterized in that the fluo drill screws (50i) are arranged aligned on parallel lines (L 1; L 2 ) to said extrusion direction.
2. Procédé selon la revendication 1 , caractérisé en ce que la corne au moins (300) est réalisée en aluminium. 2. Method according to claim 1, characterized in that the horn at least (300) is made of aluminum.
3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la corne au moins (300) est positionnée et reliée à la poutre centrale (100) par l'intermédiaire d'au moins un surface plane externe de ladite corne (300) accolée à une surface plane externe correspondante de la poutre centrale (100), lesdites surfaces planes respectivement accolées étant orientées selon la direction d'extrusion (« Y »). 3. Method according to any one of the preceding claims, characterized in that the horn at least (300) is positioned and connected to the central beam (100) via at least one outer planar surface of said horn ( 300) contiguous to a corresponding outer flat surface of the central beam (100), said respectively contiguous flat surfaces being oriented in the extrusion direction ("Y").
4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le berceau avant comporte deux cornes (200, 300) reliées respectivement à l'une et à l'autre des deux extrémités longitudinales de la poutre centrale (100). 4. Method according to any one of the preceding claims, characterized in that the front cradle comprises two horns (200, 300) connected respectively to one and the other of the two longitudinal ends of the central beam (100).
5. Berceau avant de véhicule, caractérisé en ce qu'il est obtenu selon le procédé conforme à l'une quelconque des revendications précédentes. 5. Front cradle of a vehicle, characterized in that it is obtained according to the method according to any one of the preceding claims.
6. Véhicule, en particulier véhicule automobile, caractérisé en ce qu'il comporte un berceau avant conforme à la revendication 5. Vehicle, in particular a motor vehicle, characterized in that it comprises a front cradle according to claim 5.
PCT/FR2014/051427 2013-06-18 2014-06-12 Method for manufacturing a front cradle of a vehicle and front cradle of a vehicle obtained by said method WO2014202871A1 (en)

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FR1355681A FR3006943B1 (en) 2013-06-18 2013-06-18 METHOD FOR MAKING A FRONT CABLE FOR A VEHICLE, AND FRONT CABLE FOR A VEHICLE OBTAINED BY THIS METHOD.
FR1355681 2013-06-18

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150003902A1 (en) * 2013-06-28 2015-01-01 GM Global Technology Operations LLC Tipped surfaces for mixed material joining and methods of making and using the same
US20150000086A1 (en) * 2013-06-28 2015-01-01 GM Global Technology Operations LLC Vehicle substrate having a pocket for isolating a fastener
FR3037305B1 (en) * 2015-06-12 2017-07-07 Peugeot Citroen Automobiles Sa MULTI-PIECE ANCHORING DEVICE FOR A MOTOR VEHICLE ALUMINUM CRADLE TRAVERSE
FR3066990B1 (en) * 2017-05-30 2019-07-19 Peugeot Citroen Automobiles Sa EXTRUDED METAL ALLOY PROFILE FOR A CARRIER STRUCTURE OF A MOTOR VEHICLE
EP3428043A1 (en) * 2017-07-12 2019-01-16 Tirsan Treyler Sanayi Ve Ticaret Anonim Sirketi One-piece cross-member for carrier truck chassis
EP3569479B1 (en) 2018-05-15 2024-04-03 Volvo Car Corporation Subframe for a vehicle
EP3671367A1 (en) * 2018-12-21 2020-06-24 ETA SA Manufacture Horlogère Suisse Assembly comprising a support, a plate and attachment means, in particular for a timepiece
CN111907595A (en) * 2020-07-16 2020-11-10 苏州同捷汽车工程技术股份有限公司 Aluminum extrusion section bar support structure
CN111963525A (en) * 2020-07-16 2020-11-20 苏州同捷汽车工程技术股份有限公司 A overlap joint structure for section bar is connected
DE102021207313A1 (en) * 2021-07-12 2023-01-12 Robert Bosch Gesellschaft mit beschränkter Haftung Modular vehicle frame for an electric vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1270374A2 (en) * 2001-06-29 2003-01-02 Sistemi Sospensioni S.p.A. A cross-member for a motor-vehicle suspension system
FR2986489A1 (en) * 2012-02-08 2013-08-09 Peugeot Citroen Automobiles Sa Bearing structure i.e. cradle, for supporting connections on ground of automobile, has connection part positioned and attached laterally to cross-section of profile through external surface that is coupled to external surface of profile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040108677A1 (en) * 2002-11-20 2004-06-10 Honda Motor Co., Ltd. Suspension arm mounting structure
US7938414B2 (en) * 2005-09-13 2011-05-10 Ksm Castings Gmbh Auxiliary frame, particularly for motor vehicles
CN2913124Y (en) * 2006-06-23 2007-06-20 一汽海马汽车有限公司 Automobile front suspension cross beam
FR2919846B1 (en) * 2007-08-08 2009-12-18 Renault Sas CONNECTING MEANS FOR THE ASSEMBLY OF TWO MECHANICAL STRUCTURE PARTS OF A MOTOR VEHICLE
DE102009043474A1 (en) * 2008-10-30 2010-05-12 Ksm Castings Gmbh Front axle for a motor vehicle and method for its production
FR2946569B1 (en) * 2009-06-15 2011-06-24 Renault Sas TOWING RING FOR MOTOR VEHICLE AND VEHICLE EQUIPPED WITH SUCH A TOWING RING

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1270374A2 (en) * 2001-06-29 2003-01-02 Sistemi Sospensioni S.p.A. A cross-member for a motor-vehicle suspension system
FR2986489A1 (en) * 2012-02-08 2013-08-09 Peugeot Citroen Automobiles Sa Bearing structure i.e. cradle, for supporting connections on ground of automobile, has connection part positioned and attached laterally to cross-section of profile through external surface that is coupled to external surface of profile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "EJOT FDS Schraube - EJOT GmbH & Co. KG - Pressemitteilung", 25 May 2009 (2009-05-25), XP055114745, Retrieved from the Internet <URL:http://www.pressebox.de/pressemitteilung/ejot-gmbh-co-kg/EJOT-FDS-Schraube/boxid/265233> [retrieved on 20140422] *

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