SE509617C2 - Beam-shaped object, such as a bumper and the like - Google Patents

Beam-shaped object, such as a bumper and the like

Info

Publication number
SE509617C2
SE509617C2 SE9603327A SE9603327A SE509617C2 SE 509617 C2 SE509617 C2 SE 509617C2 SE 9603327 A SE9603327 A SE 9603327A SE 9603327 A SE9603327 A SE 9603327A SE 509617 C2 SE509617 C2 SE 509617C2
Authority
SE
Sweden
Prior art keywords
workpiece
temperature
necessary
shaped object
period
Prior art date
Application number
SE9603327A
Other languages
Swedish (sv)
Other versions
SE9603327L (en
SE9603327D0 (en
Inventor
Peter Benson
Original Assignee
Peter Benson
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 Peter Benson filed Critical Peter Benson
Priority to SE9603327A priority Critical patent/SE509617C2/en
Publication of SE9603327D0 publication Critical patent/SE9603327D0/en
Priority to AU42279/97A priority patent/AU4227997A/en
Priority to PCT/SE1997/001533 priority patent/WO1998011267A1/en
Publication of SE9603327L publication Critical patent/SE9603327L/en
Publication of SE509617C2 publication Critical patent/SE509617C2/en

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
    • B60R19/03—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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Metal Rolling (AREA)
  • Body Structure For Vehicles (AREA)
  • Laminated Bodies (AREA)

Abstract

A beam-shaped object of aluminium is presented, whereby a blank is chosen of high strength, heat treatable, age hardenable aluminium alloy which is first subjected to solution heat treatment at a temperature of at least 400 DEG C for a period of time of at least one minute, that the workpiece is then cooled to a temperature of 200 DEG C at the most with a speed of at least 1 DEG C/s, that the workpiece is then shaped by pressing or rolling whereby the workpiece is given longitudinal stiffeners in the top and/or bottom flanges and when necessary transverse stiffeners in the webs in order to increase the energy absorbing capacity, that the workpiece is worked to provide holes or similar, that the workpiece is then subjected to age hardening, and that the workpiece is then, when necessary, joined to other parts, preferably manufactured in a similar manner, and finally coated in an ordinary way.

Description

-509 617 2 temperatur av högst 200 °C med en hastighet av minst l °C/s., att arbetsstycket är format till sin profilform genom valsning eller pressning, varvid eller i anslutning vartill arbets- stycket är fërsett längsgående rillor i under- och/eller överflänsarna dsmt vid behov även är försett med tvärgàende rillor i livet för att öka belkelementets energiupptagande förmåga, att arbetsstycket därefter är bearbetat genom hàltag- ning eller liknande, såsom genom stansning, fräsning, slipning eller kemisk bearbetning samt att arbetsstycket därefter har genomgått varmàldring, nämligen vid en temperatur inom omradet 100 ”C - 250 ”C och under en tid av storleksordningen minst 60 min. samt att arbetsstycket slutligen vid behov har samman- fogats med andra, företrädesvis pà liknande sätt tillverkade detaljer och vid behov har ytbehandlats pà ordinärt sätt. -509 617 2 not exceeding 200 ° C at a speed of not less than 1 ° C / s. / or the upper flanges, if necessary, are also provided with transverse grooves in the waist to increase the energy-absorbing capacity of the belt element, that the workpiece is subsequently machined by holding or the like, such as by punching, milling, grinding or chemical processing and that the workpiece has subsequently undergone hot aging. , namely at a temperature in the range 100 "C - 250" C and for a period of the order of at least 60 minutes. and that the workpiece has finally, if necessary, been joined with other, preferably similarly manufactured details and, if necessary, has been surface-treated in the ordinary manner.

Uppfinningen förklaras närmare i det följande med hänvisning till bifogade ritningar.The invention is explained in more detail below with reference to the accompanying drawings.

Pig. l är en tvärsektion genom en stötfängarbalk med öppet, upp och nedvänt U-formigt tvärsnitt; Fig. 2 är en tvärsektion genom en stötfàngarbalk med slutet, upp och nedvänt U-formigt tvärsnitt; Fig. 3 och 4 liknar fig. l och 2, men visar tvärsektioner genom balkar, som är utformade med längsgående rillor; Fig. 5 visar en del av en tvärsektion genom en stötfàng- arbalk, liknande den i fig. 3 visade, vilken balk emellertid dessutom är försedd med vertikala avstyvningar; Fig. 6 är en frontvy av en del av den i fig. 5 visade balken.Pig. 1 is a cross section through a bumper beam with open, upside down and U-shaped cross section; Fig. 2 is a cross-section through a bumper beam with closed, upside down U-shaped cross section; Figs. 3 and 4 are similar to Figs. 1 and 2, but show cross-sections through beams formed with longitudinal grooves; Fig. 5 shows a part of a cross section through a bumper beam, similar to the one shown in Fig. 3, which beam is however also provided with vertical braces; Fig. 6 is a front view of a part of the beam shown in Fig. 5.

Enligt uppfinningen bestàr det balkformiga föremälet säsom utgängsmaterial för t.ex. en stötfàngarbalk av en alumi- niumplàt av en mycket höghällfast, härdbar legering, nämligen t.ex. AA 7075 eller likvärdig. Formningen sker genom plastisk bearbetning, t.ex. pressning. valsning eller likvärdig metod eller en kombination av dessa metoder, varvid eller i anslut- ning vartill arbetsstycket förses med längsgående rillor i un- der- och/eller överflänsarna samt vid behov även förses med tvärgàende rillor i livet för att öka belkelementets ener- giupptagande förmàga. Formningen sker omedelbart efter kraftig kylning i samband med upplösningsbehandling dà materialet har 509 *617 3 làg hàllfasthet och är duktilt. Efter kylning ökar hàllfasthe- ten markant, varför formningen måste ske snabbt eller under stark kyla. Under stark kyla sker (beroende av temperaturen) ingen eller en endast làngsam ökning av hàllfastheten.According to the invention, the beam-shaped object consists as starting material for e.g. a bumper beam of an aluminum plate of a very high-strength, hardenable alloy, namely e.g. AA 7075 or equivalent. The shaping takes place through plastic processing, e.g. pressing. rolling or equivalent method or a combination of these methods, wherein or in connection with which the workpiece is provided with longitudinal grooves in the lower and / or upper flanges and if necessary also provided with transverse grooves in the life to increase the energy absorption capacity of the bell element . The molding takes place immediately after heavy cooling in connection with dissolution treatment as the material has a low strength and is ductile. After cooling, the strength increases markedly, which is why the molding must take place quickly or during heavy cooling. During severe cold (depending on the temperature) there is no or only a slow increase in strength.

Legeringar av det angivna slaget (tillhörande AA 7000 serien) innehàller zink, magnesium och koppar, och de tillhör den grupp, som har den högsta hàllfastheten. De kan vara käns- liga för korrosion men kan skyddas delvis genom ytbehandling (plätering, lackering). Vidare är rätt àldringsprocess av stor betydelse för korrosionsbeständigheten.Alloys of the specified type (belonging to the AA 7000 series) contain zinc, magnesium and copper, and they belong to the group with the highest strength. They can be sensitive to corrosion but can be partially protected by surface treatment (plating, painting). Furthermore, the correct aging process is of great importance for corrosion resistance.

De längsgående rillorna i över- och underflänsarna har till uppgift att motverka lokal buckling i. de av böjmoment belastade plàtfälten. Detta möjliggör en högre utnyttjandegrad av materialets hàllfasthet vid kollision än vad som àstadkoms i motsvarande profil utan rillor.The longitudinal grooves in the upper and lower flanges have the task of counteracting local buckling in the plate fields loaded by bending moments. This enables a higher degree of utilization of the material's strength in the event of a collision than is achieved in the corresponding profile without grooves.

De längsgående rillorna i liven har till uppgift att motverka lokal buckling i de av tvärkraft belastade plàtfäl- ten. Detta möjliggör en högre utnyttjandegrad av materialets hällfasthet vid kollision än vid som ästadkoms i motsvarande profil utan rillor.The longitudinal grooves in the webs have the task of counteracting local buckling in the plate fields loaded by transverse force. This enables a higher degree of utilization of the material's pour strength in the event of a collision than that achieved in the corresponding profile without grooves.

De tvärgàende rillorna i liven har till uppgift att mot- verka lokal buckling i de av tvärkraft belastade plàtfälten.The task of the transverse grooves in the life is to counteract local buckling in the plate fields loaded by transverse force.

Detta möjliggör även en högre energiabsorberande förmåga och högre utnyttjandegrad av materialets hàllfasthet vid kolli- sion än vad som àstadkoms i motsvarande profil utan rillor.This also enables a higher energy-absorbing capacity and a higher degree of utilization of the material's strength in the event of a collision than is achieved in the corresponding profile without grooves.

Enligt uppfinningen skapas således en tunnväggig profil med öppet tvärsnitt, där plàtfälten styvas av medelst rillor för utnyttjande av materialets höga hàllfasthet.According to the invention, a thin-walled profile with an open cross-section is thus created, where the plate fields are stiffened by means of grooves for utilizing the high strength of the material.

Alternativt skapas enligt uppfinningen en tunnväggig profil med slutet tvärsnitt, vilken bestär av nyssnämnda tunn- väggiga profil med öppet tvärsnitt i kombination med ytterli- gare åtminstone en fläns, som utgörs av liknande plåt och är fäst vid den öppna profilen genom limning, svetsning, friction stir welding, genom mekaniskt förband eller en kombination av dessa.Alternatively, according to the invention, a thin-walled profile with a closed cross-section is created, which consists of the aforementioned thin-walled profile with an open cross-section in combination with a further at least one flange, which consists of similar sheet metal and is attached to the open profile by gluing, welding, friction stir welding, by mechanical connection or a combination of these.

Företrädesvis utgörs materialet av plåt av en höghàllfast aluminiumlegering i AA7000, AA2000, AA 6000 eller AA 8000 serien, företrädesvis med preferens av AA 7000 serien med 509 -617 tillsatser av koppar, (t.ex. AA 7075 eller likvärdigt) Ämnen av det nyss angivna materialet utsätts enligt upp- finningen för en upplösningsbehandling på det ovan angivna sättet och därefter kraftig kylning, varefter de formas plas- tiskt, antingen omedelbart efter kylningen, såsom inom 30 min. och företrädesvis inom 5 min.Preferably the material of sheet metal is a high-strength aluminum alloy in the AA7000, AA2000, AA 6000 or AA 8000 series, preferably with the preference of the AA 7000 series with 509 -617 additives of copper, (e.g. AA 7075 or equivalent). according to the invention are subjected to a dissolution treatment in the above-mentioned manner and then to vigorous cooling, after which they are formed plastically, either immediately after cooling, such as within 30 minutes. and preferably within 5 minutes.

Alternativt kan man kyla de upplösningsbehandlade ämnena till en temperatur av ca. -40 "C direkt efter kylningen, var- vid den plastiska formningen kan ske vid ett senare tillfälle, i vilket fall det är möjligt att genomföra formningen vid en temperatur mellan kallt tillstànd och ordinär rumstemperatur.Alternatively, the solution-treated substances can be cooled to a temperature of approx. -40 "C immediately after cooling, whereby the plastic molding can take place at a later time, in which case it is possible to carry out the molding at a temperature between the cold state and ordinary room temperature.

Claims (3)

509 617 Patentkrav509,617 Patent claims 1. Balkformigt föremål av aluminium kännetecknat därav, att ett arbetsstycke som består av, såsom utgångsmaterial, en höghållfast härdbar aluminiumlegering, som först är upplösningsbehandlat, vid en temperatur av minst 400 °C under en tid av minst 1 min, företrädesvis upp till ca. 30 min, och är kylt till en temperatur av högst 200 °C med en hastighet av minst 1 °C/s., att arbetsstycket därefter är format till ett balkelement med sin profilform innefattande en över- och/eller en underfläns genom valsning eller pressning, varvid eller i anslutning 'vartill balkelementet är försett med längsgående rillor i under och/eller överflänsarna samt vid behov även är försett med tvärgående rillor i livet för att öka balkelementets energiupptagande förmåga, att arbetsstycket därefter är bearbetat genom håltagning eller liknande, såsom genom stansning, fräsning, slipning eller kemisk bearbetning samt att arbetsstycket därefter har genomgått varmåldring vid en temperatur inom området 100 °C - 250 °C och under en tid av storleksordningen minst 60 min. samt att arbetsstycket slutligen vid behov har sammanfogats med andra, företrädesvis på liknande sätt tillverkade detaljer och vid behov har ytbehandlats på ordinärt sätt.Beam-shaped object of aluminum, characterized in that a workpiece consisting of, as starting material, a high-strength curable aluminum alloy, which is first solution-treated, at a temperature of at least 400 ° C for a period of at least 1 minute, preferably up to approx. 30 minutes, and is cooled to a temperature of at most 200 ° C at a speed of at least 1 ° C / s., That the workpiece is then formed into a beam element with its profile shape comprising an upper and / or a lower flange by rolling or pressing , wherein or in connection with which the beam element is provided with longitudinal grooves in the lower and / or upper flanges and if necessary also provided with transverse grooves in the web to increase the beam element's energy-absorbing ability, , milling, grinding or chemical processing and that the workpiece has subsequently undergone hot aging at a temperature in the range 100 ° C - 250 ° C and for a period of the order of at least 60 minutes. and that the workpiece has finally, if necessary, been joined to other, preferably similarly manufactured parts and, if necessary, has been surface-treated in the ordinary manner. 2. Balkformigt föremål enligt patentkravet 1" kännetecknat därav, att varmåldringsprocessen är genomförd i form av en tvåstegsprocess.Beam-shaped object according to Claim 1, characterized in that the heat-aging process is carried out in the form of a two-step process. 3. Balkformigt föremål enligt patentkravet 1 eller 2, kännetecknat därav, att föremålet är utformat såsom en stötfångarbalk, speciellt för bilar.Beam-shaped object according to Claim 1 or 2, characterized in that the object is designed as a bumper beam, especially for cars.
SE9603327A 1996-09-13 1996-09-13 Beam-shaped object, such as a bumper and the like SE509617C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9603327A SE509617C2 (en) 1996-09-13 1996-09-13 Beam-shaped object, such as a bumper and the like
AU42279/97A AU4227997A (en) 1996-09-13 1997-09-11 A beam-shaped object such as a beam for a bumper and the like
PCT/SE1997/001533 WO1998011267A1 (en) 1996-09-13 1997-09-11 A beam-shaped object such as a beam for a bumper and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9603327A SE509617C2 (en) 1996-09-13 1996-09-13 Beam-shaped object, such as a bumper and the like

Publications (3)

Publication Number Publication Date
SE9603327D0 SE9603327D0 (en) 1996-09-13
SE9603327L SE9603327L (en) 1998-03-14
SE509617C2 true SE509617C2 (en) 1999-02-15

Family

ID=20403867

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9603327A SE509617C2 (en) 1996-09-13 1996-09-13 Beam-shaped object, such as a bumper and the like

Country Status (3)

Country Link
AU (1) AU4227997A (en)
SE (1) SE509617C2 (en)
WO (1) WO1998011267A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1346882A3 (en) * 1998-09-18 2003-10-29 Cosma International Inc. Bumper beam assembly
DE50001892D1 (en) * 2000-10-19 2003-05-28 Benteler Automobiltechnik Gmbh Bumper arrangement
SE0501174L (en) * 2005-05-25 2006-07-25 Gestamp Hardtech Ab Bumper beam for vehicles
DE102006062163A1 (en) * 2006-12-22 2008-06-26 Benteler Automobiltechnik Gmbh Bumper for vehicle, has cross beam that has a u-shaped profile with bar, and two opposite journals having stage that extends in longitudinal direction of cross beam
JP4330652B2 (en) 2007-03-28 2009-09-16 ユニプレス株式会社 Vehicle metal absorber, vehicle bumper system, automobile bumper absorber and automobile bumper system
FR2929568B1 (en) * 2008-04-02 2014-08-22 Hydro Aluminium Alunord ENERGY ABSORPTION ASSEMBLY AND VEHICLE COMPRISING SAID ASSEMBLY.
DE102009006609B4 (en) * 2009-01-29 2017-05-18 Benteler Automobiltechnik Gmbh Bumper for a motor vehicle
US8496764B2 (en) 2011-12-01 2013-07-30 Ford Global Technologies, Llc System and method for manufacturing an F-temper 7xxx series aluminum alloy
JP6125466B2 (en) * 2014-06-11 2017-05-10 豊田鉄工株式会社 Structural members for automobiles
US9757784B2 (en) 2015-03-10 2017-09-12 Ford Global Technologies, Llc Temperature measurement device for metal sheet
EP3321137B1 (en) * 2015-07-08 2020-06-10 Nippon Steel Corporation Bumper reinforcement and vehicle provided with same
MX2019004494A (en) * 2016-10-24 2019-12-18 Shape Corp Multi-stage aluminum alloy forming and thermal processing method for the production of vehicle components.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2161174A5 (en) * 1971-11-16 1973-07-06 Cegedur
IT1030395B (en) * 1975-03-21 1979-03-30 Ulma Spa BUMPERS FOR MOTOR VEHICLES
US4386799A (en) * 1981-01-26 1983-06-07 Molnar Industries, Inc. Shock absorbing device having predictable deflection characteristics
NO173538C (en) * 1991-09-06 1993-12-29 Norsk Hydro As Construction beam and method of production of the same
JPH0860285A (en) * 1994-06-16 1996-03-05 Furukawa Electric Co Ltd:The Bumper reinforcement made of aluminum alloy and its production
NO960288D0 (en) * 1996-01-24 1996-01-24 Raufoss Automotive As Stötfangerskinne

Also Published As

Publication number Publication date
AU4227997A (en) 1998-04-02
SE9603327L (en) 1998-03-14
WO1998011267A1 (en) 1998-03-19
SE9603327D0 (en) 1996-09-13

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