EP1011891B1 - Profile en tole roulee - Google Patents

Profile en tole roulee Download PDF

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Publication number
EP1011891B1
EP1011891B1 EP98934043A EP98934043A EP1011891B1 EP 1011891 B1 EP1011891 B1 EP 1011891B1 EP 98934043 A EP98934043 A EP 98934043A EP 98934043 A EP98934043 A EP 98934043A EP 1011891 B1 EP1011891 B1 EP 1011891B1
Authority
EP
European Patent Office
Prior art keywords
profile
blank
strength
roll
metal profile
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.)
Expired - Lifetime
Application number
EP98934043A
Other languages
German (de)
English (en)
Other versions
EP1011891A1 (fr
Inventor
Leif Carlsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Outokumpu Stainless AB
Original Assignee
AvestaPolarit 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
Priority claimed from SE9702635A external-priority patent/SE9702635D0/xx
Application filed by AvestaPolarit AB filed Critical AvestaPolarit AB
Priority to EP01117282A priority Critical patent/EP1157761A1/fr
Publication of EP1011891A1 publication Critical patent/EP1011891A1/fr
Application granted granted Critical
Publication of EP1011891B1 publication Critical patent/EP1011891B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • B21D5/083—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers for obtaining profiles with changing cross-sectional configuration
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/36—Making hollow objects characterised by the use of the objects collapsible or like thin-walled tubes, e.g. for toothpaste

Definitions

  • the present invention relates to a roll-shaped thin plate metal profile, the strength and/or shaping properties of which vary partially in its longitudinal direction (see for example GB-A-800780).
  • the object of the present invention is to provide a roll-shaped metal profile of the kind mentioned above, at which the disadvantages enumerated above have been eliminated.
  • the features characterizing the invention are set out in claim 1.
  • the dependent claims describe preferred embodiments of the invention. Thanks to the invention there has now been provided a roll-shaped thin plate metal profile, which in an excellent manner fulfils its purpose and, in addition thereto, at the same time is both simple and cheap to manufacture.
  • the profile according to the invention it becomes possible to match the width of the flat blank, from which the profile is made, to the relevant stress. In this way the weight can be reduced with maintained bending stress strength.
  • the profile according to the invention can be manufactured both as I-beams and tubes having a circular or square cross-section.
  • the greater material area is at the clamped end. If the profile is loaded between two support points, the greater material cross-sectional area should be at the center. In order to facilitate a finishing shaping or machining of the profile either the blank, from which the profile is made, or the finished profile is exposed to a partial heating to above 300°C, which produces a remaining reduction of the rupture and tensile limits of the profile material.
  • a flat blank 1 of varying width which is intended to match the strength properties desired in the completed profile 2, which is in detail and in cross-section illustrated in Fig. 2.
  • This profile 2 is intended to form a post or a strut for e.g. a vehicle and the flat blank 1 of the profile 2 does at its base 3 have a width greater than that at its top portion 4.
  • the completed post or tube will have its greatest strength at the lower portion, or mounting portion, where the stress is highest, in the case that the post or strut is to be used to support e.g. a road sign or as a strut in a vehicle or the like.
  • the upper portion 4 of the profile 2, where the stresses are not so high, has been made weaker. In this way there has been provided a profile 2, which both has a lower weight and where the material consumption is lower compared with conventional profiles having a uniform cross-sectional profile.
  • Figs. 3 and 4 illustrate an alternative embodiment relating to a blank 7 and its profile 5 forming an I-beam to be used in the back support of a motor car chair, in which the highest stress in the profile 5 is at the mounting end 6.
  • Figs. 5 and 6 show an alternative embodiment, according to which the blank 11 for the profile 10 is tubular and exhibits inwardly folded portions 8, 9, the extension of which in the transverse direction of the profile 10 varies in the longitudinal direction. Consequently, also in this embodiment material is conserved, the strength of the profile 5, 10 being highest in the places where it is most exposed to forces.
  • the tubular profiles 2, 5, 10 having a non-linear material content one has thus attained a lower weight completely or partly maintaining the strength against bending stresses.
  • the profile 2, 5, 10 When the profile 2, 5, 10 is manufactured it is shaped starting from a flat metallic blank 1, 7, 11 in long, rolled strips, which are cut before or after having been given a roll profile.
  • the profile 2, 5, 10 can also be manufactured from prestamped blanks of formate sheet. If the roll profiling starts from a strip, the width thereof can be varied in a non-linear manner in the way that material is separated by cutting, stamping, nibbling or by different shearing methods. If the roll profiling starts from blanks, the width thereof can be varied according to the methods described above.
  • Roll-shaped profiles 2, 5, 10 of an ultrahigh stress steel having a tensile limit above e.g. 700 N/mm 2 must partially be given a greater plastic deformation than that which the starting material tolerates without rupturing. According to the invention this can be achieved in the way that the blank, or the completed profile, is partially heated to above 300°C, resulting in a remaining reduction of the rupture and tensile limits, which facilitates a subsequent shaping.
  • This shaping may consist in e.g. a bending of the profile or in a punching or embossment of the material, which process is then facilitated.
  • the heating can be carried out according to different methods, e.g. induction heating, laser heating or with the use of hot dies. In certain cases it could also be suitable to heat portions of the completed profile 2, 5, 10 in order to attain a reduction of the rupture and tensile limits in preparation of a subsequent treatment.
  • the thickness difference between plates to be welded together butt to butt must not be too great.
  • the thickness ratio 1:2 is suitable.
  • the critical parameter is not the thickness but rather the strength of the material. The reason for this is that such sheets have a strength about 6 times that of an ordinary, soft sheet. To get a smooth transition between the materials one can heat the ultrahigh strength steel sheet at the transition to the ordinary, soft sheet to a temperature above 300°C in locations along all of the edge secured to the soft sheet.
  • this partial heating is used on the one hand to facilitate a subsequent treatment of the ultrahigh strength steel and, on the other, to achieve a soft transition in the weld joint between it and an ordinary, soft sheet. If this treatment is not carried out the weld joint will rupture due to the different strength properties of the two materials.
  • a partial heating of the ultrahigh strength sheet is also carried out in such portions of the sheet which shall be adapted to serve as deformation zones in e.g. vehicles. This is done to diminish the damages, which otherwise would occur upon a collision, namely if certain exposed portions of a vehicle are more easily deformed than other portions also consisting of that ultrahigh strength material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Coating With Molten Metal (AREA)
  • Powder Metallurgy (AREA)

Claims (3)

  1. Profilé en tôle mince mis en forme par laminage ayant des propriétés de résistance mécanique et/ou de conformation qui varient partiellement le long de sa direction longitudinale, caractérisé en ce que l'ébauche (1, 7, 11) plate créant le profilé (2, 5, 10) est constituée d'un acier de résistance mécanique ultra-grande ayant une limite augmentée de résistance à la rupture et à la traction, la largeur de l'ébauche variant suivant la direction longitudinale et étant choisie pour satisfaire à une propriété appropriée de résistance mécanique, la largeur de l'ébauche étant adaptée en fonction de la résistance mécanique qui est exigée du profilé.
  2. Profilé métallique suivant la revendication 1, caractérisé en ce que l'ébauche (1, 7, 11) ou le profilé (2, 5, 10) fini a été soumis à un traitement thermique par chauffage partiel au-dessus de 300° C dans des parties sélectionnées de la tôle afin de produire une réduction restante de la limite à la rupture et à la traction pour faciliter une mise en forme subséquente ou pour produire des zones de déformation.
  3. Profilé métallique suivant la revendication 2, caractérisé en ce que la résistance à la traction s'élève à plus de 700 N/mm2.
EP98934043A 1997-07-04 1998-07-06 Profile en tole roulee Expired - Lifetime EP1011891B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01117282A EP1157761A1 (fr) 1997-07-04 1998-07-06 Méthode de réduire la rupture et la résistance à la tension d'une tôle en acier à haute résistance mécanique

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE9702635 1997-07-04
SE9702635A SE9702635D0 (sv) 1997-07-04 1997-07-04 Rullformad metallprofil av tunnplåt
SE9703445A SE512543C2 (sv) 1997-07-04 1997-09-24 Rullformad metallprofil av tunnplåt
SE9703445 1997-09-24
PCT/SE1998/001329 WO1999001242A1 (fr) 1997-07-04 1998-07-06 Profile en tole roulee

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP01117282A Division EP1157761A1 (fr) 1997-07-04 1998-07-06 Méthode de réduire la rupture et la résistance à la tension d'une tôle en acier à haute résistance mécanique

Publications (2)

Publication Number Publication Date
EP1011891A1 EP1011891A1 (fr) 2000-06-28
EP1011891B1 true EP1011891B1 (fr) 2003-09-17

Family

ID=26663032

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01117282A Withdrawn EP1157761A1 (fr) 1997-07-04 1998-07-06 Méthode de réduire la rupture et la résistance à la tension d'une tôle en acier à haute résistance mécanique
EP98934043A Expired - Lifetime EP1011891B1 (fr) 1997-07-04 1998-07-06 Profile en tole roulee

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01117282A Withdrawn EP1157761A1 (fr) 1997-07-04 1998-07-06 Méthode de réduire la rupture et la résistance à la tension d'une tôle en acier à haute résistance mécanique

Country Status (6)

Country Link
EP (2) EP1157761A1 (fr)
JP (1) JP4173277B2 (fr)
AT (1) ATE249898T1 (fr)
DE (1) DE69818281T2 (fr)
SE (1) SE512543C2 (fr)
WO (1) WO1999001242A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012059233A1 (fr) * 2010-11-03 2012-05-10 Johnson Controls Gmbh Procédé de formage aux rouleaux de profilés et élément structural ainsi fabriqué

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB800780A (en) * 1955-08-16 1958-09-03 Baas Erwin A method for producing a hollow beam, and improvements in and relating to a beam andloading means produced in accordance with such method
GB2035169B (en) * 1978-11-28 1982-06-16 British Steel Corp Roll forming of metal
JPS59206118A (ja) * 1983-05-10 1984-11-21 Nippon Kokan Kk <Nkk> 薄板の成形方法
US5080412A (en) * 1991-04-22 1992-01-14 Chrysler Corporation Vehicle and bumper beam combination

Also Published As

Publication number Publication date
JP2001515790A (ja) 2001-09-25
SE512543C2 (sv) 2000-04-03
DE69818281T2 (de) 2004-07-22
WO1999001242A1 (fr) 1999-01-14
ATE249898T1 (de) 2003-10-15
EP1011891A1 (fr) 2000-06-28
SE9703445D0 (sv) 1997-09-24
DE69818281D1 (de) 2003-10-23
SE9703445L (sv) 1999-01-05
EP1157761A1 (fr) 2001-11-28
JP4173277B2 (ja) 2008-10-29

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