WO2009093914A1 - Ensemble poutre de pare-chocs et procédé de fabrication d'un ensemble pare-chocs - Google Patents

Ensemble poutre de pare-chocs et procédé de fabrication d'un ensemble pare-chocs Download PDF

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Publication number
WO2009093914A1
WO2009093914A1 PCT/NO2009/000027 NO2009000027W WO2009093914A1 WO 2009093914 A1 WO2009093914 A1 WO 2009093914A1 NO 2009000027 W NO2009000027 W NO 2009000027W WO 2009093914 A1 WO2009093914 A1 WO 2009093914A1
Authority
WO
WIPO (PCT)
Prior art keywords
profile element
bumper assembly
elongated
assembly according
chambered
Prior art date
Application number
PCT/NO2009/000027
Other languages
English (en)
Inventor
Torbjørn PEDERSEN
Original Assignee
Pedersen Torbjoern
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 Pedersen Torbjoern filed Critical Pedersen Torbjoern
Priority to DE112009000202T priority Critical patent/DE112009000202T5/de
Priority claimed from NO20090355A external-priority patent/NO330287B1/no
Publication of WO2009093914A1 publication Critical patent/WO2009093914A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B60R2019/1813—Structural beams therefor, e.g. shock-absorbing made of metal
    • B60R2019/182—Structural beams therefor, e.g. shock-absorbing made of metal of light metal, e.g. extruded

Definitions

  • the present invention relates to a bumper assembly for a vehicle, where the bumper assembly comprises elements which are designed to be capable of absorbing collision energy and forces in the event of a collision, and more particularly the present invention relates to a bumper assembly with an integrated crash box.
  • the present invention also relates to a method for manufacturing the bumper assembly.
  • a standard bumper assembly is typically mounted at the front and rear of a vehicle.
  • the bumper assembly is intended to absorb the collision energy and forces in the event of a collision from in front or from behind, in order thereby to minimise or limit damage to the vehicle structure and passengers.
  • the bumper assembly typically comprises a cross beam which is attached via so-called crash boxes to the vehicle frame's longitudinal supporting beams.
  • the cross beam is provided in order to "transfer" the energy and forces, when these are generated in the event of a collision, to the crash boxes, where the crash boxes will convert the collision energy and forces to deformation work.
  • the bumper assembly is typically manufactured in such a manner that the crash boxes are arranged in the central sections of the supporting beams, thereby causing the collision energy and forces to be transferred via the cross beam to the crash boxes with the least possible bending and finally to the vehicle frame's supporting beams.
  • the cross beams in such a bumper assembly may have a square or rectangular profile, but they may also have a more complex profile. They may, moreover, be made of many materials, but on account of cost and weight saving, today's cross beams will be made of a lightweight material such as aluminium.
  • the crash boxes will be made of a lightweight material and often have a square or circular shape. They will furthermore be designed with weakened zones or areas that facilitate deformation and also in a specific direction.
  • a bumper assembly comprises a transverse beam and one or more crash boxes.
  • the transverse beam and the crash boxes are manufactured as separate units, whereupon the different units are assembled by welding, bolting, etc. to form the bumper assembly.
  • this is a time- consuming and comprehensive manufacturing process, where stringent requirements are also placed on the joining of the different units (welding, tolerance, etc.).
  • An object according to the present invention will be to provide a bumper assembly where the crash boxes are an integrated part of the actual bumper assembly.
  • a second object according to the present invention is to provide a simplified manufacture of a bumper assembly.
  • a bumper assembly for a vehicle which is designed to absorb collision energy and forces in the event of a collision, where the bumper assembly comprises an elongated, multi-chambered profile element.
  • the elongated, multi-chambered profile element may be made of different materials, but will most advantageously be made of aluminium, since the use of aluminium will simplify the manufacture and machining of the profile element.
  • the profile element may then advantageously be manufactured by means of an extrusion process.
  • the profile element will be closed, in which case it will consist of a front and a rear surface, together with two lateral surfaces.
  • the rear surface moreover, will have end edges extending a specific length outside the lateral edges, with the result that the rear surface's end edges form a flange in the profile element.
  • the profile element's internal cavity will furthermore be partitioned off by at least one dividing wall, thereby forming two separate chambers in the profile element, where in a preferred embodiment the dividing wall extends into the cavity over the entire length of the profile element.
  • the profile element may also be manufactured in such a way that it is not completely closed, whereby a profile element of this kind may be manufactured, for example, without a rear surface (wall).
  • the dividing wall or dividing walls partitioning off the internal cavity in the closed profile element will extend over the entire length of the profile element, but it should also be understood that the dividing wall or dividing walls may only be provided over a part or parts of the length.
  • the elongated, multi-chambered profile element is manufactured with a constant or identical wall thickness over its entire length, but it should be understood that the profile element may also be manufactured with a different wall thickness in specific areas and over parts of its length.
  • the chamber in the profile element which is used for manufacturing the crash boxes may have a lesser wall thickness, thereby facilitating deformation of the crash boxes in the event of a collision.
  • the crash boxes may also be provided with deformation zones.
  • the bumper assembly is provided substantially symmetrically about a centre plane extending in the vehicle's longitudinal direction.
  • the bumper assembly comprises a closed, elongated and rectangular profile element, where the profile element is further provided with two chambers.
  • the chambers will have different cross sectional areas.
  • one or more areas will be sawn or cut out during the process of manufacturing the bumper assembly. This will result in one chamber of the profile element having cut-out areas in its longitudinal direction, where the remaining areas are employed for manufacturing at least one crash box.
  • the remaining areas in this chamber will then be further machined, with more cuts being sawn or cut out in the area where the profile element's lateral surfaces and the dividing wall meet and in the area where lateral surfaces and the rear surface meet.
  • cut-out surfaces which will form the walls in a crash box, will then be folded in towards each other by means of suitable tools to form a closed unit.
  • the cut-out surfaces when viewed in the profile element's longitudinal direction, will be welded or connected together in another suitable manner, whereby each remaining area will then form a closed crash box.
  • the length of the cut-out surfaces will be such that when the cut-out surfaces are folded in towards each other, they will be lying in abutment with each other, or also overlapping each other, for example by two-three millimetres.
  • one chamber of the profile element is cut out up to the profile element's dividing wall.
  • cuts may also be made which only extend a specific length into one chamber, where it may be appropriate to make such cuts near a crash box. This or these surfaces/areas can then be "folded" in towards the crash box in order to form a reinforcing means in the crash box or the bumper, to which reinforcing means, a tow hook, for example, may be affixed.
  • a number of through-going holes are advantageously provided in the crash box's flange, which is composed of the rear surface in the profile element. By means of bolts and the through- going hole, the bumper assembly will then be able to be fixed to the vehicle's frame.
  • a central hole will also be provided through the rear surface in each crash box, where this hole will have approximately the same cross sectional area as a closed crash box's internal cross sectional area, thereby enabling a tool, for example a mandrel, to be pushed into the crash box through this hole.
  • This will be advantageous in making it easier to secure the profile element during machining, during production of the crash box (folding cut-out surfaces), as well as in cases where the profile element has to be bent.
  • Figure 1 illustrates a profile element employed for manufacturing a bumper assembly according to the present invention
  • Figure 2 illustrates the profile element partly cut and sawn out, where two unfinished crash boxes are shown
  • Figure 3 illustrates details in the production of the crash boxes
  • Figure 4 illustrates the finished bumper assembly.
  • FIG. 1 illustrates a preferred embodiment of the present invention, where an elongated profile element 1 is employed in the manufacture of the bumper assembly.
  • the elongated profile element 1 is composed of a front surface 2, two lateral surfaces 3 and a rear surface 4, which surfaces 1-4 together form the rectangular, closed profile element 1.
  • the rear surface 4 will have end surfaces 6 extending a distance out from the lateral surfaces 3, with the result that these end surfaces 6 form a flange in the profile element 1.
  • a dividing wall 5 Internally in the elongated and closed profile element 1 there is provided a dividing wall 5, where this dividing wall extends in the longitudinal direction of the whole profile element 1.
  • the dividing wall 5 will furthermore divide the elongated profile element 1 into two chambers, where these will have different cross sectional areas.
  • the surfaces 1-4 and the dividing wall 5 are provided with the same wall thickness.
  • the profile element 1 is made of aluminium.
  • an area of the elongated profile element 1 is sawn or cut out in the part of the profile element 1 which is bounded by the lateral surfaces 3, the dividing wall 5 and the rear surface 4, thereby forming two pairs of remaining "legs" 7 in the elongated profile element 1. After further machining, these two pairs of "legs" will form bumper assembly crash boxes.
  • the cutting or sawing out is carried out by sawing several cuts in the profile element 1 perpendicular to the profile element's 1 longitudinal direction, where these cuts will extend up to the dividing wall 5, whereupon the sawing is performed along the dividing wall 5 in the profile element's 1 longitudinal direction. This process is repeated until the desired number of "legs" 7 is obtained.
  • FIG 3 it is shown that a part of the lateral surface 3 in the pair of "legs” 7 is partly bent inwards towards the centre of the profile element 1, several cuts 8 being sawn or cut in the area bounded by the lateral surfaces 3 and the dividing wall 5 and the area bounded by the lateral surfaces 3 and the rear surface 4 in the profile element 1.
  • the cuts are cut on each end of the "legs'" 7 lateral surfaces 3 and only for a specific length in the profile element's 1 longitudinal direction, with the result that when the cut-out surfaces in the pair of "legs” 7 are bent in towards the centre of the profile element 1 (i.e. the cut-out surfaces are bent substantially 90 degrees relative to the profile element's 1 longitudinal direction), the cut-out surfaces will be in abutment or also overlapping each other by a few millimetres.
  • a number of holes 9 are provided, which are used to attach the bumper assembly to the vehicle's frame, for example by means of bolts (not shown).
  • this attachment plate there may also be provided a hole (not shown) which essentially corresponds to the internal cross section of the closed crash box, thereby enabling a tool, for example a mandrel, to be pushed into the cavity in the crash box.
  • the tool may be employed in connection with the production of the bumper assembly, for example for securing, bending of the profile element 1 etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)

Abstract

La présente invention se rapporte à un ensemble pare-chocs pour véhicule ainsi qu'à son procédé de fabrication. L'ensemble pare-chocs comprend un élément profilé allongé à chambres multiples qui est conçu pour absorber l'énergie et les forces de collision en cas de collision, où la découpe et l'usinage d'au moins une des chambres de l'élément profilé crée un certain nombre de boîtiers amortisseurs intégrés dans l'élément profilé, lesquels boîtiers amortisseurs sont en outre pourvus de zones de déformation.
PCT/NO2009/000027 2008-01-23 2009-01-23 Ensemble poutre de pare-chocs et procédé de fabrication d'un ensemble pare-chocs WO2009093914A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112009000202T DE112009000202T5 (de) 2008-01-23 2009-01-23 Stoßfängerträgeranordnung und Verfahren zur Herstellung einer Stoßfängeranordnung

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO20080450 2008-01-23
NO20080450 2008-01-23
NO20090355A NO330287B1 (no) 2008-01-23 2009-01-23 Stotfangersammenstilling med integrert kollisjonsboks
NO20090355 2009-01-23

Publications (1)

Publication Number Publication Date
WO2009093914A1 true WO2009093914A1 (fr) 2009-07-30

Family

ID=40901300

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2009/000027 WO2009093914A1 (fr) 2008-01-23 2009-01-23 Ensemble poutre de pare-chocs et procédé de fabrication d'un ensemble pare-chocs

Country Status (1)

Country Link
WO (1) WO2009093914A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150274101A1 (en) * 2014-03-26 2015-10-01 Aisin Seiki Kabushiki Kaisha Bumper reinforcement
DE102023001192A1 (de) 2023-03-27 2024-01-11 Mercedes-Benz Group AG Stoßfängereinheit und Verfahren zu deren Herstellung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519110A1 (de) * 1994-05-27 1995-12-21 Raufoss Automotive As Stossfänger, sowie Herstellung desselben
US5727826A (en) * 1994-12-23 1998-03-17 Alusuisse Technology & Management Ltd. Bumper for vehicles
EP0908356A1 (fr) * 1997-10-07 1999-04-14 Euromotive Gesellschaft m.b.H. Pare-choc pour un véhicule
WO2000046074A1 (fr) * 1999-02-03 2000-08-10 Norsk Hydro Asa Poutre de pare-chocs et son procede de fabrication
FR2855437A1 (fr) * 2003-05-30 2004-12-03 Valeo Thermique Moteur Sa Procede de fabrication d'un boitier absorbeur d'energie pour poutre pare-chocs de vehicule automobile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519110A1 (de) * 1994-05-27 1995-12-21 Raufoss Automotive As Stossfänger, sowie Herstellung desselben
US5727826A (en) * 1994-12-23 1998-03-17 Alusuisse Technology & Management Ltd. Bumper for vehicles
EP0908356A1 (fr) * 1997-10-07 1999-04-14 Euromotive Gesellschaft m.b.H. Pare-choc pour un véhicule
WO2000046074A1 (fr) * 1999-02-03 2000-08-10 Norsk Hydro Asa Poutre de pare-chocs et son procede de fabrication
FR2855437A1 (fr) * 2003-05-30 2004-12-03 Valeo Thermique Moteur Sa Procede de fabrication d'un boitier absorbeur d'energie pour poutre pare-chocs de vehicule automobile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150274101A1 (en) * 2014-03-26 2015-10-01 Aisin Seiki Kabushiki Kaisha Bumper reinforcement
US9573542B2 (en) * 2014-03-26 2017-02-21 Aisin Seiki Kabushiki Kaisha Bumper reinforcement
DE102023001192A1 (de) 2023-03-27 2024-01-11 Mercedes-Benz Group AG Stoßfängereinheit und Verfahren zu deren Herstellung

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