NO173597B

NO173597B - DOOR STRAIGHT PROFILE, BUMPER, BODY REINFORCEMENT AND LIKE

Info

Publication number: NO173597B
Application number: NO89890080A
Authority: NO
Inventors: Karl-Heinz Von Zengen; Wolfgang Bures; Gerhardt Soellner
Original assignee: Vaw Ver Aluminium Werke Ag
Priority date: 1988-03-02
Filing date: 1989-01-09
Publication date: 1993-09-27
Also published as: DE3882515D1; NO890080L; EP0330759A2; NO890080D0; EP0330759B1; DE3806724A1; ES2043777T3; EP0330759A3; ATE91665T1; NO173597C

Abstract

A weight-optimised bending beam for door-stiffening ribs, bumpers, vehicle body stiffeners or the like is to be developed which has a maximum bending rigidity with a prescribed installation height h in the force application direction and as low a weight as possible, can be manufactured as a mass produced component and can be adapted to different load cases by slight modification. Bending beams for door-stiffening ribs, bumpers, vehicle stiffeners or the like consisting of a hollow profile with at least two plane-parallel deformation faces which are located opposite one another and arranged perpendicularly to the force application face in such a way that the deformation faces (2, 3) of the bending beam (1) are connected in positively and/or non-positively engaging fashion to at least one additional profile (4, 5), the centre of the additional profile coinciding approximately with the force application point and the ends extending to a point in which at least two thirds of the bending moment are reduced. Application in door-stiffening ribs, bumpers, vehicle body stiffeners or the like. <IMAGE>

Description

Foreliggende oppfinnelse angår en "bjelke for døranslags-prof il, støtfanger, karosseriforsterkninger og lignende bestående av en med en tilleggsprofil utstyrt hulprofil med minst to overfor hverandre beliggende planparallelle formflater som er anordnet loddrett på kraftangrepsflaten. The present invention relates to a "beam for door stop profile, bumper, bodywork reinforcements and the like consisting of a hollow profile equipped with an additional profile with at least two opposite plane-parallel shaped surfaces which are arranged vertically on the force attack surface.

En bjelke av den innledningsvis nevnte art er kjent fra DE-OS A beam of the type mentioned at the outset is known from DE-OS

36 06 024 (Aluminium Walzwerke Singen). I denne kjente bjelken inneslutter profilveggene sammen med et par tverr-vegger som forbinder disse et profilkammer, idet profilveggene rager utenfor ytterflåtene på tverrveggene under dannelse av vulstavsnitt. 36 06 024 (Aluminium Walzwerke Singen). In this known beam, the profile walls, together with a pair of transverse walls that connect them, enclose a profile chamber, the profile walls projecting beyond the outer rafters of the transverse walls to form bead sections.

Dimensjoneringen av den kjente bjelken skjer etter den maksimale kraft som skal opptas og profilkammerets tverrsnitt er det samme over hele lengden. Kraft-vei-diagrammet er konstant over hele bjelkens lengde (se figur 11 i DE-OS 36 06 024 ). The dimensioning of the known beam takes place according to the maximum force to be absorbed and the profile chamber's cross-section is the same over the entire length. The force-path diagram is constant over the entire length of the beam (see figure 11 in DE-OS 36 06 024 ).

Ved en vektoptimert bjelke av den innledningsvis nevnte art må det for hvert belastningstilfelle fremstilles spesielle profiler med tilsvarende utformede vulstavsnitt. Dette er ikke egnet for massefabrikasjon og er lite lønnsomt. In the case of a weight-optimized beam of the type mentioned at the outset, special profiles with correspondingly designed bead sections must be produced for each load case. This is not suitable for mass production and is not profitable.

Hensikten med foreliggende oppfinnelse er å utvikle en vektoptimert bjelke for døranslagsprofiler, støtfangere, karosseriforsterkninger og lignende som ved på forhånd angitt innbygningshøyde h i kraftangrepsretningen oppviser et maksimum av bøyestivhet med lavest mulig vekt og som kan masseproduseres og som ved små endringer er tilpassbare til forskjellige belastningstilfeller. The purpose of the present invention is to develop a weight-optimized beam for door stop profiles, bumpers, bodywork reinforcements and the like which, at a predetermined installation height h in the force attack direction, exhibits a maximum of bending stiffness with the lowest possible weight and which can be mass-produced and which, with small changes, can be adapted to different load cases.

Dette oppnås ifølge oppfinnelsen ved hjelp av en bjelke for døranslagsprofil, støtfanger, karosseriforsterkning og lignende, bestående av en med en tilleggsprofil utstyrt hulprofil med minst to overfor hverandre beliggende planparallelle formflater som er anordnet loddrett på kraft angrepsflaten, kjennetegnet ved at bjelkens formflater i ytterfase er form- og/eller kraftsluttende forbundet med minst ett tilleggsprofil, idet midten av tilleggsprofilet stemmer tilnærmet overens med kraftangrepspunktet, og at endene strekker seg til punkter slik at de spenner over et område der minst to tredjedeler av bøyemomentet påføres, og at det ved berøringsstedene mellom formflatene og tilleggs-prof ilene er anordnet en svalehaleforbindelse. Det har vist seg at ved hjelp av avstivninger ved siden, loddrett på kraftangrepsretningen oppnås en optimal tilpassing til de forskjellige på forhånd gitte kraft-vei-diagrammer. Profilen er utformet slik at profilens hovedmasse ligger i Y-aksens ytterfase. According to the invention, this is achieved with the help of a beam for door stop profile, bumper, body reinforcement and the like, consisting of a hollow profile equipped with an additional profile with at least two opposite plane-parallel shaped surfaces which are arranged perpendicular to the force attack surface, characterized by the beam's shaped surfaces in the outer phase being form- and/or force-stopping connected with at least one additional profile, the center of the additional profile being approximately consistent with the point of force attack, and that the ends extend to points so that they span an area where at least two-thirds of the bending moment is applied, and that at the points of contact between the form surfaces and the additional profiles are provided with a dovetail connection. It has been shown that by means of bracing at the side, perpendicular to the direction of force attack, an optimal adaptation to the various pre-given force-path diagrams is achieved. The profile is designed so that the main mass of the profile lies in the outer phase of the Y-axis.

De utvendige forsterkningene kan være symmetriske eller ikke-symmetriske på begge sider avhengig av bøyepåkjenningen. De blir fortrinnsvis fremstilt som en ekstrudert aluminiums-profil og formsluttende og kraftsluttende forbundet med bjelken ved hjelp av egnede skjøter. Det er spesielt fordelaktig når tilleggsprofilen for øking av bjelkens E-modul er utstyrt med en fiberforsterkning. Som forsterkning kan det også benyttes partikkelforsterkede ekstruderte profiler som er dispersjonsherdet. The external reinforcements can be symmetrical or non-symmetrical on both sides depending on the bending stress. They are preferably manufactured as an extruded aluminum profile and connected to the beam in a form-locking and force-locking manner by means of suitable joints. It is particularly advantageous when the additional profile for increasing the beam's E-module is equipped with a fiber reinforcement. As reinforcement, particle-reinforced extruded profiles that are dispersion hardened can also be used.

Oppfinnelsen skal i det følgende forklares nærmere under henvisning til tegningen, der The invention will be explained in more detail below with reference to the drawing, where

figur 1 er et tverrsnitt gjennom en bjelke ifølge oppfinnelsen , og Figure 1 is a cross-section through a beam according to the invention, and

figur 2 er et perspektivisk riss av en bjelke ifølge oppfinnelsen. Figure 2 is a perspective view of a beam according to the invention.

I figur 1 er bjelken 1 vist med flater 2,3 som oppviser svalehaleribber 6,7. Over disse svalehaleribbene er tilleggsprofiler 4,5 med svalehalespor 8,9 formsluttende forbundet. En kraft 10 virker vinkelrett på kraftangrepsflaten 11. In Figure 1, the beam 1 is shown with surfaces 2,3 which exhibit dovetail ribs 6,7. Above these dovetail ribs, additional profiles 4,5 with dovetail grooves 8,9 are form-lockingly connected. A force 10 acts perpendicular to the force attack surface 11.

Lengden L er den samlede bredde på tilleggsprofilene 4,5 og bjelken 1 på tvers av lastens angrepsretning. Høyden h er tykkelsen på bjelken respektiv på tilleggsprofilene i kraftens angrepsretning. The length L is the combined width of the additional profiles 4,5 and the beam 1 across the direction of attack of the load. The height h is the thickness of the beam or of the additional profiles in the direction of attack of the force.

I figur 2 er bjelken 1 vist med tilleggsprofiler 4,5 som ikke forløper over hele bjelkens lengde. Tilleggsprofilene 4,5 er festet formsluttende ved hjelp av svalehaleribbene 6,7 som er anordnet på bjelkens 1 flater 2,3. En vesentlig del av foreliggende oppfinnelse består i at forsterkningene (altså tilleggsprofilene 4,5) kan tilpasses ethvert belastnings-tilf elle ved endring av sidelengden s. Bjelken med svalehalespor eller svalehaleribber kan masseproduseres og kombineres med ønsket lengde på tilleggsprofilene. Den formsluttende forbindelse sørger for en fullstendig overføring av bøye-kreftene. Retning på kraften 10 er angitt med pil vinkelrett på bjelken. In figure 2, the beam 1 is shown with additional profiles 4,5 which do not extend over the entire length of the beam. The additional profiles 4,5 are fixed form-fitting by means of the dovetail ribs 6,7 which are arranged on the surfaces 2,3 of the beam 1. An essential part of the present invention is that the reinforcements (i.e. the additional profiles 4,5) can be adapted to any load case by changing the side length s. The beam with dovetail grooves or dovetail ribs can be mass-produced and combined with the desired length of the additional profiles. The form-locking connection ensures a complete transfer of the bending forces. The direction of the force 10 is indicated by an arrow perpendicular to the beam.

Det er også mulig å anordne tilleggsprofilene usymmetrisk over bjelkens lengde. Dette kan skje ved forskyvning av tilleggsprofilene i svalehaleforbindelsen. It is also possible to arrange the additional profiles asymmetrically over the length of the beam. This can happen by shifting the additional profiles in the dovetail connection.

Claims

1. Beam for door stop profile, bumper, bodywork reinforcement and the like, consisting of a hollow profile equipped with an additional profile with at least two opposite plane-parallel shaped surfaces which are arranged perpendicular to the force attack surface, characterized in that the shaped surfaces (2,3) of the beam (1) in the outer phase are shaped and/or end-to-end connected with at least one additional profile (4,5), the center of the additional profile being approximately consistent with the point of force attack, and that the ends extend to points so that they span an area where at least two-thirds of the bending moment is applied, and that the at the points of contact between the form surfaces (2,3) and the additional profiles (4,5) a dovetail connection is arranged.

2. Beam according to claim 1, characterized in that a dovetail rib (6,7) is formed in the form surfaces (2,3) and a dovetail groove (8,9) is arranged in the additional profiles (4,5).

3. Beam according to one or more of the preceding claims, characterized in that the additional profile is a hollow profile.

4. Beam according to one or more of the preceding claims, characterized in that the combined width 1 of the beam (1) and the additional profiles (4,5) across the direction of force attack is at least twice as large as the height h of the beam and the additional profile in the direction of force attack.

5. Beam according to one or more of the preceding claims, characterized in that the additional profile is a hollow profile with a rectangular cross-section, where the ratio between the width 1 and the height h is 1:2.

6. Beam according to one or more of the preceding claims, characterized in that the additional profiles (4,5) consist of an extruded profile of fibre-reinforced aluminium, the fibers being aligned in the longitudinal direction of the profile.

7. Beam according to one or more of the preceding claims, characterized in that the additional profiles consist of an extruded profile of dispersion-hardened aluminium.