WO1999015390A1 - Procede de fabrication d'une poutre en tole metallique tubulaire a sections d'extremite en saillie et poutre en tole metallique fabriquee selon ce procede - Google Patents

Procede de fabrication d'une poutre en tole metallique tubulaire a sections d'extremite en saillie et poutre en tole metallique fabriquee selon ce procede Download PDF

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Publication number
WO1999015390A1
WO1999015390A1 PCT/SE1998/001691 SE9801691W WO9915390A1 WO 1999015390 A1 WO1999015390 A1 WO 1999015390A1 SE 9801691 W SE9801691 W SE 9801691W WO 9915390 A1 WO9915390 A1 WO 9915390A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet metal
wave
sections
shaped
shaped profiles
Prior art date
Application number
PCT/SE1998/001691
Other languages
English (en)
Swedish (sv)
Inventor
Anders Sundgren
Mats Lindberg
Göran Berglund
Original Assignee
Accra Teknik Ab
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 Accra Teknik Ab filed Critical Accra Teknik Ab
Priority to AU92892/98A priority Critical patent/AU9289298A/en
Publication of WO1999015390A1 publication Critical patent/WO1999015390A1/fr

Links

Classifications

    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/02—Corrugating tubes longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/06—Fixed roofs

Definitions

  • the present invention refers to a procedure for manufacturing a tubular sheet metal beam having corbelled-out end sections, preferably intended to form part of a vehicle body, and a sheet metal beam manufactured according to the procedure.
  • Beams included in vehicle bodies commonly include sheet metal that has been bent, profiled or shaped by some other suitable means into halves that are joined together to form box-like elements that have flanged or corbelled-out sections arranged at their ends so that they can be joined to adjoining elements by, for example, spot welding.
  • the said corbelled-out end sections of the beam also have the task of reducing notch effects and the occurrence of concentrated areas of tension in the transition sections of the beams by having a larger radius of transition at the point of joining.
  • Known box-shaped beam-like elements can have a variety of cross-sectional shapes but have commonly been given elongated profiles and bends to gain an increased volume and thereby an increased ability to accommodate loads as well as to hinder buckling and being pressed inwards, in other words, to avoid a deformed or reduced cross-section that would, for example, cause the beam to collapse due to the effect of external forces such as running into wild animals or if the vehicle rolls over.
  • a wish to be able to simplify and cut the cost of manufacturing stiffened, tube- shaped beams for vehicle bodies produced from sheet metal has therefore existed for some time.
  • These beams should have corbelled-out end sections for welding and one present objective is thus to achieve a procedure that realises this goal and, more specifically expressed, that permits a procedure for a significantly simplified production of tubular-shaped sheet metal beams that display a high degree of stiffness in relation to their weight, at the same time as they are very resistant to buckling forces, and that can be provided in a very simple way with the essential shape preparation required at the end sections for joining together with adjoining beams.
  • fig. 1 shows schematically by a cut-away diagram how a section of a vehicle body is built-up and how a beam according to the invention is used in the body
  • fig. 2 shows a perspective view of a beam manufactured according to the principles of the invention
  • fig. 3 shows the beam according to fig. 2 in a corbelled-out embodiment
  • fig. 4 shows a cross-section through the beam. That generally designated 1 in fig.
  • the sheet metal beam according to the invention could naturally be located at any suitable position in the body 1 , but in the embodiment shown here, it forms a cross-ways roof beam whose primary task is to bring rigidity to the body and to prevent the roof from being pressed inwards if the vehicle rolls over.
  • the beam is formed from joined together pieces of sheet metal with a thin-walled, enclosed trapezium-shaped cross-section that includes two flange sections 5, 6 separated at a distance from one another and parallel with the main plane of the beam, plus two rib sections 7, 8 at right angles to the flange sections.
  • the thickness of the sheet metal in this described embodiment of the beam has been chosen to be in the range 0.4 - 0.5 mm and the other dimensions of the beam chosen are 22 mm height and 58 mm width.
  • the span of the beam (its length) is not specified in detail.
  • the material is some type of steel that can be hardened, preferably carbonised manganese steel such as drilling steel or similar.
  • the pieces of sheet metal include a first and a second similarly U-shaped cross-sectional profile formed by rolling i.e. in the form of shanks and a central section, that are turned to face each other and joined together by welding so that they together form the enclosed, box-shaped beam mentioned above. Since welding in general reduces the resistance of the material in a negative manner in the vicinity of the point of welding, the welded joints are situated on those parts that are intended to form the principle plane of the beam 2, in other words, in what is known as the neutral plane that is free from tension when the beam is subjected to stress.
  • those parts that take up the greatest tension during the application of a force to the beam so that they are subjected to a bending movement i.e. primarily those parts that, according to the orientation of the beam, form the flange sections of the beam, are arranged with a certain excess of material in the form of concertina-like, trapezium-shaped wave profiles 9 running in the longitudinal direction of the flange sections with a series of alternating valleys 10 and peaks 11.
  • This excess of material is located at the greatest possible distance from a centre of gravity that coincides with the main plane of the beam, a large moment of inertia (I) is obtained and thereby also a large resistance to bending (W) for the beam.
  • This wave-shaped excess of material also significantly increases the ability of the beam to withstand buckling, as should be realised.
  • this profiling does not necessarily need to be trapezium-shaped, as shown here, but can also have other suitable shapes, such as, for example, the shape of a sine wave.
  • the height of the concertina-like, wave-profiles i.e. the distance between the valley 10 and peak 11, is selected to be 2.2 mm, which in this case is equivalent to about 10% of the height of the beam.
  • the concertina-like, wave-profiling 9 when based on that known as flat thin plate sheet metal, is preferably produced by roller moulding in a rolling press, whereby the U-shaped shanks of the starting blanks are also arranged in the same manufacturing operation.
  • the rib sections 7, 8 are not given a longitudinal wave-shaped form as such a form, at least in this described embodiment of the invention, would only act as a deformation notch and as such would exclusively weaken the beam 2 when seen in the intended direction of its bending.
  • Fig. 3 shows how the beam 2 is arranged prior to a welding operation by the end sections 12 of the beam having been given the necessary corbelling-out or flanging 13 by means of suitable shaping tools such as a die and counter die.
  • this corbelling-out operation utilises the excess material that is formed from the concertina-like wave profiles 9. It is advantageous if this excess material is so adapted that the corbelled-out wave-shaped sections (flange sections 5, 6) maintain a primarily flat surface in the corbelled-out position.
  • rib sections 7, 8 formed from shanks located on either side of the centre of the beam are initially pressed outwards, as indicated by the arrows in fig.
  • the present invention is not limited to that described above and shown in the figures, but can be altered and modified in many different ways within the scope of the concept of the invention specified in the following claims.
  • the beam according to the invention need not necessarily have the shaped profile in the example of the embodiment shown and described here, but can naturally have any shaped profile whatsoever that is suitable for the purpose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une poutre en tôle métallique tubulaire présentant des sections d'extrémité en saillie, destinée de préférence à former une partie de la carrosserie d'un véhicule, ainsi qu'une poutre en tôle métallique fabriquée selon ce procédé. En vue de simplifier la fabrication et de réduire le coût de celle-ci, des poutres de forme tubulaire, renforcées, à extrémités en saillie pour le soudage sont fabriquées selon un procédé caractérisé en ce que la poutre est munie, partiellement ou en totalité, de profilés ondulés du type accordéon (9) avec une série de creux (10) et de crêtes (11) alternés s'étendant dans le sens longitudinal de la poutre, et en ce que ces profilés ondulés forment un excès de matériau qui est utilisé dans une opération subséquente de mise en saillie des sections d'extrémité (12) de la poutre.
PCT/SE1998/001691 1997-09-23 1998-09-22 Procede de fabrication d'une poutre en tole metallique tubulaire a sections d'extremite en saillie et poutre en tole metallique fabriquee selon ce procede WO1999015390A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU92892/98A AU9289298A (en) 1997-09-23 1998-09-22 Method for manufacturing a tubular sheet metal beam having corbelled-out end sections and a sheet metal beam manufactured in accordance with the method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9703422-7 1997-09-23
SE9703422A SE9703422L (sv) 1997-09-23 1997-09-23 Förfarande för framställning av en rörformig plåtbalk med utkragade ändpartier och en plåtbalk framställd enlig förfarandet

Publications (1)

Publication Number Publication Date
WO1999015390A1 true WO1999015390A1 (fr) 1999-04-01

Family

ID=20408337

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/001691 WO1999015390A1 (fr) 1997-09-23 1998-09-22 Procede de fabrication d'une poutre en tole metallique tubulaire a sections d'extremite en saillie et poutre en tole metallique fabriquee selon ce procede

Country Status (3)

Country Link
AU (1) AU9289298A (fr)
SE (1) SE9703422L (fr)
WO (1) WO1999015390A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1036728A1 (fr) * 1999-03-18 2000-09-20 Volkswagen Aktiengesellschaft Poutrelle à rainures longitudinales, en particulier pour toit de véhicule à moteur
DE102004029737C5 (de) * 2004-06-19 2012-10-18 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Rollgeformter Dachspriegel und Verfahren zu seiner Herstellung
DE102015001808A1 (de) * 2015-02-11 2016-08-11 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Dachsegment für ein Fahrzeug sowie Verfahren zum Bereitstellen eines Dachsegments
CN109398488A (zh) * 2017-08-16 2019-03-01 张跃 一种陆地交通工具结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE436182B (sv) * 1982-02-01 1984-11-19 Dobel Ab Skyddsbalk, samt forfarande for framstellning av densamma
WO1997036068A1 (fr) * 1996-03-22 1997-10-02 John Allan Trenerry Elements d'ossature allonges
DE19634280A1 (de) * 1996-08-24 1998-02-26 Forsch Qualitaetszentrum Oderb Gebogenes Profil, insbesondere Trapezprofile, für Überdeckungskonstruktionen, Lärmschutzeinhausungen, Lärmschutzwände, Brücken-, Hallen- und Dachkonstruktionen und ein Verfahren zur Herstellung eines derartigen Profils

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE436182B (sv) * 1982-02-01 1984-11-19 Dobel Ab Skyddsbalk, samt forfarande for framstellning av densamma
WO1997036068A1 (fr) * 1996-03-22 1997-10-02 John Allan Trenerry Elements d'ossature allonges
DE19634280A1 (de) * 1996-08-24 1998-02-26 Forsch Qualitaetszentrum Oderb Gebogenes Profil, insbesondere Trapezprofile, für Überdeckungskonstruktionen, Lärmschutzeinhausungen, Lärmschutzwände, Brücken-, Hallen- und Dachkonstruktionen und ein Verfahren zur Herstellung eines derartigen Profils

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1036728A1 (fr) * 1999-03-18 2000-09-20 Volkswagen Aktiengesellschaft Poutrelle à rainures longitudinales, en particulier pour toit de véhicule à moteur
DE102004029737C5 (de) * 2004-06-19 2012-10-18 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Rollgeformter Dachspriegel und Verfahren zu seiner Herstellung
DE102015001808A1 (de) * 2015-02-11 2016-08-11 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Dachsegment für ein Fahrzeug sowie Verfahren zum Bereitstellen eines Dachsegments
US10167020B2 (en) 2015-02-11 2019-01-01 GM Global Technology Operations LLC Roof segment for a vehicle and method for producing a roof segment
CN109398488A (zh) * 2017-08-16 2019-03-01 张跃 一种陆地交通工具结构

Also Published As

Publication number Publication date
SE9703422D0 (sv) 1997-09-23
AU9289298A (en) 1999-04-12
SE508235C2 (sv) 1998-09-14
SE9703422L (sv) 1998-09-14

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