DE10307637A1 - Cross-beam for vehicle bumper comprises C-profile made from magnesium or magnesium alloy whose arms are attached to deformation components and whose wall thickness is less than that of its base - Google Patents
Cross-beam for vehicle bumper comprises C-profile made from magnesium or magnesium alloy whose arms are attached to deformation components and whose wall thickness is less than that of its base Download PDFInfo
- Publication number
- DE10307637A1 DE10307637A1 DE2003107637 DE10307637A DE10307637A1 DE 10307637 A1 DE10307637 A1 DE 10307637A1 DE 2003107637 DE2003107637 DE 2003107637 DE 10307637 A DE10307637 A DE 10307637A DE 10307637 A1 DE10307637 A1 DE 10307637A1
- Authority
- DE
- Germany
- Prior art keywords
- magnesium
- cross member
- crossbeam
- wall thickness
- plastic
- 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.)
- Ceased
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
- B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
-
- 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
-
- 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
- B60R2019/242—Arrangements for mounting bumpers on vehicles on two vertical sleeves, e.g. on energy absorber ends
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Die Erfindung betrifft einen quer zur Fahrzeuglängsrichtung angeordneten Querträger aus Leichtmetall als Bestandteil eines Stoßfängersystems mit einem offenen hutförmigen Profil mit einem Zentralsteg und zwei davon divergierenden Schenkeln, an die sich jeweils randseitig ein Flansch anschließt, und einer Anbindung an ein Deformationselement nach dem Oberbegriff des Anspruchs 1.The invention relates to a cross to the vehicle's longitudinal direction arranged cross member Made of light metal as part of a bumper system with an open hat-shaped Profile with a central web and two diverging legs, to which a flange is connected at the edge, and a connection to a deformation element according to the generic term of claim 1.
Es gehört zum Stand der Technik einen
quer zur Fahrzeuglängsrichtung
angeordneten Querträger als
Bestandteil eines Stoßfängersystems
mit Anbindung an ein Deformationselement aus einem Leichtmetall
wie beispielsweise Aluminium oder aus nichtmetallischen Materialien
herzustellen, um gegenüber einem
Querträger
aus Stahl Gewicht einzusparen. Aus Aluminium sind bereits sowohl
geschlossene als auch offene Hohlprofile für den Querträger bekannt. Beispielsweise
zeigt die
Wünschenswert wäre es, neben Aluminium und der Verstärkung durch Schaumkörper auch Magnesium als Ausgangsmaterial einsetzen zu können, da Aluminium aufgrund seiner größeren Dichte gegenüber Magnesium noch immer etwa 50% schwerer ist. Dieser Gewichtsunterschied kann in bestimmten Anwendungsfällen auch die höheren Materialkosten des Magnesiums rechtfertigen. Magnesium ist jedoch relativ spröde und besitzt einen Elastizitätsmodul der ca. um den Faktor 5 kleiner ist als der von Stahl und ca. 40% kleiner als der von Aluminium. Folglich sind Querträger aus Magnesium im Verhältnis viel zu materialintensiv, um die gleiche Crashperformance wie Querträger aus Aluminium oder Stahl aufzuweisen. Außerdem neigt Magnesium zur Kontaktkorrosion, wenn es mit anderen Metallen wie beispielsweise einer Crash box aus Stahl oder Aluminium in Berührung kommt. So ist es zwar grundsätzlich bekannt, dass zumindest Teile eines Stoßfängers auch aus Magnesium hergestellt werden können. Den gesamten Querträger aus einem anderen Leichtmetall als aus Aluminium zu bauen erweist sich bei der Umsetzung in die Praxis jedoch als so problematisch, dass sich bisher in der Massenproduktion nur Leichtmetalle auf der Basis von Aluminium durchgesetzt haben.Desirable would it be, in addition to aluminum and the reinforcement through foam body to also be able to use magnesium as the starting material, because Aluminum due to its greater density across from Magnesium is still about 50% heavier. That weight difference can be used in certain applications also the higher ones Justify material costs of magnesium. Magnesium is however relatively brittle and has a modulus of elasticity which is approx. 5 times smaller than that of steel and approx. 40% smaller than that of aluminum. As a result, cross members are made Magnesium in the ratio far too material-intensive to achieve the same crash performance as cross beams To have aluminum or steel. Magnesium also tends to Contact corrosion if it is with other metals such as a crash box made of steel or aluminum comes into contact. It is true basically known that at least parts of a bumper too can be made from magnesium. The entire cross member Building a light metal other than aluminum proves to be the implementation in practice, however, is so problematic that So far, only light metals based on Aluminum.
Aufgabe der Erfindung ist es daher, die Konstruktion eines Querträgers aus Leichtmetall dahingehend weiterzuentwickeln, dass auch andere Leichtmetalle außer Aluminium für die Massenproduktion geeignet sind.The object of the invention is therefore the construction of a cross member to develop from light metal to the extent that other light metals except Aluminum for mass production is suitable.
Diese Aufgabe löst die Erfindung mit den Merkmalen des kennzeichnenden Teils von Anspruch 1.The invention solves this problem with the features of the characterizing part of claim 1.
Demnach wird der Querträger mit dem an sich bekannten offenen hutförmigen Profil mit einem Zentralsteg und zwei davon divergierenden Schenkeln, an die sich jeweils randseitig ein Flansch anschließt aus Magnesium oder einer Magnesiumlegierung hergestellt, wobei die Wandstärke des Zentralstegs größer ist als die Wandstärke der divergierenden Schenkel, um der geringeren Druckbeanspruchbarkeit von Magnesium entgegenzuwirken. Insbesondere dieses spezielle offene Hutprofil kann die vergleichsweise schlechte Verformbarkeit bei Druckbelastungen von Magnesium in einem Crashfall kompensieren. Außerdem kann der Magnesiumquerträger über eine in einer Aufnahmehülse befindliche Schraubverbindung in den divergierenden Schenkeln an ein Deformationselement angebunden werden. Zum einen wird dadurch gewährleistet, dass sich das Magnesiumprofil während des Crashs um die Schraube drehen kann und so hohe Biegespannungen an der Anbindung zum Deformationselement vermieden werden. Zum anderen wird insbesondere mittels einer Aufnahmehülse aus Kunststoff eine Kontaktkorrosion zwischen dem Magnesium und dem Material der Crashbox, wenn diese beispielsweise aus Stahl oder Aluminium besteht, ausgeschlossen. Alternativ kann die Aufnahmehülse auch eine Metallhülse sein, die entweder mit Kunststoff beschichtet oder durch eine Kunststofftrennscheibe im Bereich der Schenkel des Querträgers vor einem Kontakt mit dem Magnesiumquerträger geschützt ist. Weiterhin ist es vorteilhaft, wenn sich zwischen der Stirnseite des Deformationselementes und der Innenseite des Zentralstegs des Magnesiumquer trägers ein Kontaktelement befindet, welches vorzugsweise aus Kunststoff oder einem Elastomer besteht. Durch dieses Kontaktelement wird im Falle eines Crashs die Kraft, die auf die Schraubanbindung in den divergierenden Schenkeln wirkt, derart gemildert, dass ein Ausreißen der Anbindung während des Aufpralls verhindert wird. Zudem unterbindet das Kontaktelement aus beispielsweise Kunststoff oder Elastomer eine Kontaktkorrosion zwischen dem Magnesiumquerträger und dem Material der Crashbox.Accordingly, the cross member with the well-known open hat-shaped profile with a central web and two of them diverging legs, each of which adjoins the edge a flange connects made of magnesium or a magnesium alloy, the Wall thickness the central bridge is larger than the wall thickness the diverging leg to reduce pressure resistance counteracting magnesium. In particular this particular open Hat profile can contribute to the comparatively poor deformability Compensate for magnesium pressure loads in the event of a crash. Moreover can the magnesium cross member over a in a receptacle screw connection located in the divergent legs a deformation element can be connected. For one thing, it will guaranteed that the magnesium profile during of the crash can turn around the screw and so high bending stresses be avoided at the connection to the deformation element. On the other hand contact corrosion occurs in particular by means of a plastic receiving sleeve between the magnesium and the material of the crash box, if this for example made of steel or aluminum, excluded. Alternatively, the receiving sleeve also a metal sleeve be either coated with plastic or through a plastic cutting disc in the area of the legs of the cross member before contact with the magnesium cross member protected is. It is also advantageous if there is between the end face of the deformation element and the inside of the central web of the Magnesium cross member there is a contact element, which is preferably made of plastic or an elastomer. Through this contact element in In the event of a crash, the force exerted on the screw connection in the diverging thighs acts, mitigated in such a way that tearing out of the Connection during the impact is prevented. In addition, the contact element prevents contact corrosion from, for example, plastic or elastomer between the magnesium cross member and the material of the crash box.
Aufgrund dieser konstruktiven Maßnahmen kann der Magnesiumquerträger mit vergleichsweise geringen Wandstärken von 4 bis 6 mm im Zentralsteg und 2,5 bis 4,5 mm in den divergierenden Schenkeln sowie 1,5 bis 3,5 mm in den randseitigen Flanschen hergestellt werden. Er ist daher deutlich leichter als ein vergleichbarer Querträger aus Aluminium und liefert trotzdem eine vergleichbare Crashperformance, ohne dass das Material versagt. Aufgrund der Vorkehrungen gegen Kontaktkorrosion weist der erfindungsgemäße Querträger auch die erforderlichen Dauerhaltbarkeitswerte auf.Due to these design measures, the magnesium cross member can be manufactured with comparatively small wall thicknesses of 4 to 6 mm in the central web and 2.5 to 4.5 mm in the diverging legs and 1.5 to 3.5 mm in the flanges on the edge. It is therefore significantly lighter than a comparable aluminum cross member and lie nevertheless produces a comparable crash performance without the material failing. Due to the precautions against contact corrosion, the cross member according to the invention also has the required durability values.
Die erhebliche Gewichtsersparnis, die mit dem erfindungsgemäßen Querträger gegenüber herkömmlichen Querträgern aus Leichtmetall erzielt werden kann, ist insbesondere bei frontangetriebenen Fahrzeugen im Bereich der Vorderachse interessant, um die Achslastverteilung optimal gestalten und so ein möglichst optimales dynamisches Fahrverhalten erreichen zu können.The significant weight savings those with the cross member according to the invention compared to conventional crossbeams can be achieved from light metal, especially in front-wheel drive Vehicles in the area of the front axle interesting about the axle load distribution design optimally and thus one as possible to be able to achieve optimal dynamic driving behavior.
Der erfindungsgemäße Querträger erweist sich besonders dann als für die Massenfertigung vorteilhaft, wenn er aus einem stranggepressten hutförmigen Profil besteht, dass je nach Bauraumerfordernissen nach dem Strangpressen warm oder kalt gebogen wurde. Alternativ kann der erfindungsgemäße Querträger zur Erzielung einer etwas höheren Duktilität auch aus einem partiell abgewalzten Magnesiumblech bestehen, bei dem die Blechdicke im Bereich der divergierenden Schenkel und der randseitigen Flansche partiell reduziert wurde, und das in einem Umformschritt warm in die Endform gebracht wurde. Ein zusätzliches Biegen entfällt.The cross member according to the invention proves to be particularly then as for Mass production is advantageous if it is made from an extruded hat-shaped Profile exists that depending on the space requirements after extrusion was bent warm or cold. Alternatively, the cross member according to the invention Achieve a slightly higher one ductility also consist of a partially rolled magnesium sheet which the sheet thickness in the area of the divergent legs and the edge flanges has been partially reduced, all in one Forming step was brought warm into the final shape. An additional There is no bending.
Bei beiden Herstellungsvarianten kann der Querträger durch das Einbringen einer zusätzlichen Sicke im Zentralsteg versteift werden. Zusätzlich oder alternativ kann eine Versteifung durch eine partielle Verstärkung, die mit mechanischen Fügeverfahren befestigt werden kann, erreicht werden. Auch ein Umstellen des Flansches nach innen, eventuell verbunden mit einem randseitigen Hochbiegen der Flansche nach innen erhöht die Steifigkeit des Profils. Das offene Profil kann alternativ mittels eines Magnesiumbleches zumindest teilweise geschlossen werden. Dadurch werden zwar Kosten und Gewicht erhöht, das Schließblech kann jedoch die benötigte Steifigkeit erzielen.With both production variants can the cross member by introducing an additional bead be stiffened in the central web. Additionally or alternatively, a Stiffening by partial reinforcement with mechanical joining methods can be attached can be achieved. Also changing the flange inwards, possibly connected with an upward bending on the edge the flanges raised inwards the stiffness of the profile. Alternatively, the open profile can be created using of a magnesium sheet are at least partially closed. Thereby costs and weight are increased, the striking plate can however the required stiffness achieve.
Als Ausgangsmaterialien werden insbesondere dann, wenn der erfindungsgemäße Querträger aus einem Strangpressprofil hergestellt ist, bevorzugt die Magnesiumknetlegierungen MgAl3Zn1 und MgZn2Mn1 aufgrund ihrer guten Pressbarkeit eingesetzt. Auch die Magnesiumknetlegierung MgAl6Zn1 hat sich für hohe Festigkeitsanforderungen bewährt.In particular, as starting materials then when the cross member according to the invention an extruded profile is produced, preferably the wrought magnesium alloys MgAl3Zn1 and MgZn2Mn1 used due to their good pressability. The wrought magnesium alloy MgAl6Zn1 also has high strength requirements proven.
Im folgenden ist die Erfindung anhand der Zeichnungen näher erläutert. Dabei zeigenIn the following the invention is based the drawings closer explained. Show
In
Bei einem Aufprall auf den Zentralsteg
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003107637 DE10307637A1 (en) | 2003-02-22 | 2003-02-22 | Cross-beam for vehicle bumper comprises C-profile made from magnesium or magnesium alloy whose arms are attached to deformation components and whose wall thickness is less than that of its base |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003107637 DE10307637A1 (en) | 2003-02-22 | 2003-02-22 | Cross-beam for vehicle bumper comprises C-profile made from magnesium or magnesium alloy whose arms are attached to deformation components and whose wall thickness is less than that of its base |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10307637A1 true DE10307637A1 (en) | 2004-09-09 |
Family
ID=32841812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003107637 Ceased DE10307637A1 (en) | 2003-02-22 | 2003-02-22 | Cross-beam for vehicle bumper comprises C-profile made from magnesium or magnesium alloy whose arms are attached to deformation components and whose wall thickness is less than that of its base |
Country Status (1)
Country | Link |
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DE (1) | DE10307637A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2912347A1 (en) * | 2007-02-12 | 2008-08-15 | Wagon Automotive Soc Par Actio | Reinforcement element i.e. lateral reinforcement bar, for e.g. front lateral door of motor vehicle, has lateral part terminated at longitudinal edge that is spaced from central part at specific distance greater than wall thickness of part |
DE102008026334A1 (en) * | 2008-05-31 | 2009-12-03 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Rear or front cross beam for frame structure of motor vehicle, has crash unit arranged in longitudinal end region, where beam is designed as one-sided open cap profile with cross section depth that change in longitudinal direction of beam |
EP2233369A1 (en) | 2009-03-25 | 2010-09-29 | Jacob Plastics GmbH | Impact element and use of an inlay for a holder of an impact element |
US8741285B2 (en) | 2010-06-04 | 2014-06-03 | Dietmar Fries | Method for treating a patient |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69100316T2 (en) * | 1990-03-26 | 1994-01-05 | Shape Corp | Rolled-in bumper and method of making it. |
DE19600533A1 (en) * | 1996-01-10 | 1997-07-17 | Griwe Innovative Umformtechnik | Bumper for vehicles |
DE19606538A1 (en) * | 1996-02-22 | 1997-08-28 | Dynamit Nobel Kunststoff Gmbh | Device for suspending a bumper on a vehicle |
DE4201839C2 (en) * | 1992-01-24 | 1998-09-17 | Porsche Ag | Bumpers for vehicles, in particular motor vehicles |
DE29812843U1 (en) * | 1997-07-21 | 1998-10-29 | Henkel Corp., Plymouth Meeting, Pa. | Reinforced structural elements |
DE29823973U1 (en) * | 1998-12-02 | 2000-03-02 | ISE Innomotive Systems Europe GmbH, 51702 Bergneustadt | Bumpers for vehicles |
DE19907783A1 (en) * | 1999-02-24 | 2000-08-31 | Suspa Compart Ag | Protective device for motor vehicle has compensation for cross member's deformation arising during impact by way of elastic zone in cross member, and shock absorbers are connected to cross member by pivot connection |
DE19911595A1 (en) * | 1999-03-16 | 2000-09-28 | Bayerische Motoren Werke Ag | Light weight vehicle bumper comprises a light weight carrier with an elastically deformable material attached to it. |
DE20022552U1 (en) * | 2000-03-20 | 2001-11-15 | Benteler Ag, 33104 Paderborn | Cross member as part of a bumper for motor vehicles |
-
2003
- 2003-02-22 DE DE2003107637 patent/DE10307637A1/en not_active Ceased
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69100316T2 (en) * | 1990-03-26 | 1994-01-05 | Shape Corp | Rolled-in bumper and method of making it. |
DE4201839C2 (en) * | 1992-01-24 | 1998-09-17 | Porsche Ag | Bumpers for vehicles, in particular motor vehicles |
DE19600533A1 (en) * | 1996-01-10 | 1997-07-17 | Griwe Innovative Umformtechnik | Bumper for vehicles |
DE19606538A1 (en) * | 1996-02-22 | 1997-08-28 | Dynamit Nobel Kunststoff Gmbh | Device for suspending a bumper on a vehicle |
DE29812843U1 (en) * | 1997-07-21 | 1998-10-29 | Henkel Corp., Plymouth Meeting, Pa. | Reinforced structural elements |
DE29823973U1 (en) * | 1998-12-02 | 2000-03-02 | ISE Innomotive Systems Europe GmbH, 51702 Bergneustadt | Bumpers for vehicles |
DE19907783A1 (en) * | 1999-02-24 | 2000-08-31 | Suspa Compart Ag | Protective device for motor vehicle has compensation for cross member's deformation arising during impact by way of elastic zone in cross member, and shock absorbers are connected to cross member by pivot connection |
DE19911595A1 (en) * | 1999-03-16 | 2000-09-28 | Bayerische Motoren Werke Ag | Light weight vehicle bumper comprises a light weight carrier with an elastically deformable material attached to it. |
DE20022552U1 (en) * | 2000-03-20 | 2001-11-15 | Benteler Ag, 33104 Paderborn | Cross member as part of a bumper for motor vehicles |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2912347A1 (en) * | 2007-02-12 | 2008-08-15 | Wagon Automotive Soc Par Actio | Reinforcement element i.e. lateral reinforcement bar, for e.g. front lateral door of motor vehicle, has lateral part terminated at longitudinal edge that is spaced from central part at specific distance greater than wall thickness of part |
DE102008026334A1 (en) * | 2008-05-31 | 2009-12-03 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Rear or front cross beam for frame structure of motor vehicle, has crash unit arranged in longitudinal end region, where beam is designed as one-sided open cap profile with cross section depth that change in longitudinal direction of beam |
EP2233369A1 (en) | 2009-03-25 | 2010-09-29 | Jacob Plastics GmbH | Impact element and use of an inlay for a holder of an impact element |
US8333416B2 (en) | 2009-03-25 | 2012-12-18 | Jacob Plastics Gmbh | Impact element and use of an insert for a carrier of an impact element |
US8741285B2 (en) | 2010-06-04 | 2014-06-03 | Dietmar Fries | Method for treating a patient |
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Legal Events
Date | Code | Title | Description |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |