EP3010788A1 - Procede de realisation d'un berceau avant de vehicule, et berceau avant de vehicule obtenu par ce procede - Google Patents
Procede de realisation d'un berceau avant de vehicule, et berceau avant de vehicule obtenu par ce procedeInfo
- Publication number
- EP3010788A1 EP3010788A1 EP14735613.3A EP14735613A EP3010788A1 EP 3010788 A1 EP3010788 A1 EP 3010788A1 EP 14735613 A EP14735613 A EP 14735613A EP 3010788 A1 EP3010788 A1 EP 3010788A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- central beam
- horn
- vehicle
- cradle
- front cradle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 3
- 230000000930 thermomechanical effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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.
Landscapes
- 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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1355681A FR3006943B1 (fr) | 2013-06-18 | 2013-06-18 | Procede de realisation d'un berceau avant de vehicule, et berceau avant de vehicule obtenu par ce procede. |
| PCT/FR2014/051427 WO2014202871A1 (fr) | 2013-06-18 | 2014-06-12 | Procede de realisation d'un berceau avant de vehicule, et berceau avant de vehicule obtenu par ce procede |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3010788A1 true EP3010788A1 (fr) | 2016-04-27 |
Family
ID=49212865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14735613.3A Withdrawn EP3010788A1 (fr) | 2013-06-18 | 2014-06-12 | Procede de realisation d'un berceau avant de vehicule, et berceau avant de vehicule obtenu par ce procede |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3010788A1 (fr) |
| CN (1) | CN105392690A (fr) |
| FR (1) | FR3006943B1 (fr) |
| WO (1) | WO2014202871A1 (fr) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150000086A1 (en) * | 2013-06-28 | 2015-01-01 | GM Global Technology Operations LLC | Vehicle substrate having a pocket for isolating a fastener |
| 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 |
| FR3037305B1 (fr) * | 2015-06-12 | 2017-07-07 | Peugeot Citroen Automobiles Sa | Dispositif d'ancrage multipieces pour une traverse de berceau en aluminium de vehicule automobile |
| FR3066990B1 (fr) * | 2017-05-30 | 2019-07-19 | Peugeot Citroen Automobiles Sa | Profile en alliage metallique extrude pour une structure porteuse d’un vehicule automobile |
| EP3428043A1 (fr) * | 2017-07-12 | 2019-01-16 | Tirsan Treyler Sanayi Ve Ticaret Anonim Sirketi | Traverse monobloc pour châssis de camion porteur |
| EP3569479B1 (fr) * | 2018-05-15 | 2024-04-03 | Volvo Car Corporation | Sous-cadre pour véhicule |
| EP3671367B1 (fr) * | 2018-12-21 | 2025-01-29 | ETA SA Manufacture Horlogère Suisse | Assemblage comprenant un support, une platine et des moyens de fixation, notamment pour une piece d'horlogerie |
| CN111963525A (zh) * | 2020-07-16 | 2020-11-20 | 苏州同捷汽车工程技术股份有限公司 | 一种用于型材连接的搭接结构 |
| CN111907595A (zh) * | 2020-07-16 | 2020-11-10 | 苏州同捷汽车工程技术股份有限公司 | 一种铝挤压型材支架结构 |
| DE102021207313A1 (de) * | 2021-07-12 | 2023-01-12 | Robert Bosch Gesellschaft mit beschränkter Haftung | Modularer Fahrzeugrahmen für ein Elektrofahrzeug |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20010627A1 (it) * | 2001-06-29 | 2002-12-29 | Sistemi Sospensioni Spa | Traversa per una sospensione di un autoveicolo. |
| US20040108677A1 (en) * | 2002-11-20 | 2004-06-10 | Honda Motor Co., Ltd. | Suspension arm mounting structure |
| WO2007031059A2 (fr) * | 2005-09-13 | 2007-03-22 | Ksm Castings Gmbh | Chassis secondaire destine en particulier a des vehicules automobiles |
| CN2913124Y (zh) * | 2006-06-23 | 2007-06-20 | 一汽海马汽车有限公司 | 汽车前悬架横梁 |
| FR2919846B1 (fr) * | 2007-08-08 | 2009-12-18 | Renault Sas | Moyen de liaison pour l'assemblage de deux pieces mecaniques de structure d'un vehicule automobile |
| DE102009043474A1 (de) * | 2008-10-30 | 2010-05-12 | Ksm Castings Gmbh | Vorderachsträger für ein Kraftfahrzeug sowie Verfahren zu dessen Herstellung |
| FR2946569B1 (fr) * | 2009-06-15 | 2011-06-24 | Renault Sas | Anneau de remorquage pour vehicule automobile et vehicule equipe d'un tel anneau de remorquage |
| FR2986489B1 (fr) * | 2012-02-08 | 2014-03-14 | Peugeot Citroen Automobiles Sa | Berceau moteur monobloc extrude |
-
2013
- 2013-06-18 FR FR1355681A patent/FR3006943B1/fr active Active
-
2014
- 2014-06-12 EP EP14735613.3A patent/EP3010788A1/fr not_active Withdrawn
- 2014-06-12 WO PCT/FR2014/051427 patent/WO2014202871A1/fr not_active Ceased
- 2014-06-12 CN CN201480034829.1A patent/CN105392690A/zh active Pending
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2014202871A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3006943A1 (fr) | 2014-12-19 |
| WO2014202871A1 (fr) | 2014-12-24 |
| CN105392690A (zh) | 2016-03-09 |
| FR3006943B1 (fr) | 2016-02-26 |
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