EP3328567B1 - Method and device for producing a formed hollow profile - Google Patents

Method and device for producing a formed hollow profile Download PDF

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Publication number
EP3328567B1
EP3328567B1 EP16750653.4A EP16750653A EP3328567B1 EP 3328567 B1 EP3328567 B1 EP 3328567B1 EP 16750653 A EP16750653 A EP 16750653A EP 3328567 B1 EP3328567 B1 EP 3328567B1
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EP
European Patent Office
Prior art keywords
tool
profile element
hollow metallic
multiple chambers
groups
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.)
Active
Application number
EP16750653.4A
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German (de)
English (en)
French (fr)
Other versions
EP3328567A1 (en
Inventor
Fabian PFAENDER
Paul KONKEL
Alexander Bader
Matthias Kutscher
Frank Gensty
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.)
Constellium Singen GmbH
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Constellium Singen GmbH
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Publication date
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Publication of EP3328567A1 publication Critical patent/EP3328567A1/en
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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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/025—Stamping using rigid devices or tools for tubular articles
    • 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
    • B21D7/00—Bending rods, profiles, or tubes

Definitions

  • the invention relates to a method for producing a formed hollow profile that is bent in a 2D strain, more preferably in 3D and consists of metal. Said bent hollow profile is preferably used as a formed hollow profile to be integrated in a motor vehicle, more preferably as a bumper. Furthermore, the invention relates to a device for carrying out the method according to the invention.
  • a method for producing a formed hollow profile hollow profile that is bent in a 2D strain, more preferably in 3D, i.e. curved in at least one axis or more preferably in at least two axis and consists of metal from a profile according to the preamble of Claim 1 is already known from practice.
  • US2011/0067473 discloses a method which includes, in combination, a roll former with rolls configured to form a structural beam from sheet material and a sweep unit for longitudinally sweeping a beam in any of vertical, horizontal, or combination directions.
  • US2005/0046226 discloses a method which includes a metal blank to fluid pressure to form a bumper having a shape characterized by a curvature.
  • multi roll bending permits the bending of profile curvatures in opposite directions as well as the production of three dimensionally bent profiles.
  • Such 3D shapes can only be achieved however when bending tubes (circular symmetrical cross section). It is also substantial that between the individual forming or bending operations a feed movement of the profile takes place in each case.
  • DE 10246977 discloses a device for the 3D free-form bending of profiles with arbitrary, but constant outside dimensions over the profile length, particularly hollow profiles, wherein the profile to be bent has a longitudinal axis and is moved through the through-opening-of a guide element adjoining the profile surface and a bending sleeve that is arranged downstream of the guide element referred to the feed direction and held in a carrier element in a feed direction that extends parallel to the longitudinal axis, namely by means of a feed unit that contains a rotary drive.
  • the bending sleeve can be pivoted about an axis that extends perpendicular to the feed direction and displaced perpendicular to the longitudinal axis of the profile.
  • DE102008006293 discloses a process for the three-dimensional bending of round tubes and/or profiles using the free-form bending process (also referred to as the multi roll bending process), in which the rear end of the profile to be bent is held, if appropriate such that said profile can rotate, in a feed carriage which can be moved in the longitudinal direction (X direction), and the front end of said profile is held in the bending zone, wherein the interior is supported by a mandrel shank concomitantly guided in the bending zone and the bending zone is formed by at least one central roll and a rolling roll arranged opposite said central roll (with respect to the Y plane), and is furthermore formed at least by two opposite further rolling rolls arranged in the Z plane and at least one bending roll arranged at a distance therefrom on the outlet side, characterized in that at least one or more central rolls are arranged on a common,
  • the invention is based on the object of further developing a method enabling to bend a metallic hollow profile in a 2D strain, which means a deformation in one plane, for instance XY plane.
  • the present invention also has the additional specific purpose, to allow bending also in 3D, which means a deformation in two planes, for instance XY and XZ planes.
  • the term hollow profile here refers to metallic components having a symmetrical or a non-symmetrical closed cross section, with a circular, oval, rectangular or polygonal shape with one or multiple chambers.
  • the hollow profile is preferably obtained by extruding billets, said hollow profile is then preferably an extruded hollow profile.
  • the hollow profile or the extruded hollow profile is preferably made from an aluminum alloy, preferably a 6xxx series.
  • the invention is referring to a method permitting to obtain different curvatures or forms with relatively minor device-related effort.
  • the production of curvatures on a formed hollow profile having relative small radii is to be also made possible.
  • the tool groups are fixed to the hollow metallic profile element on a given region of its cross section, in a forced based manner. It permits to hold the hollow metallic profile element in a sufficiently rigid manner to permit the subsequent forming but also permits a sufficient freedom of movement to insure the plastic deformation.
  • the deformation is obtained without the need of having an element, such as a bending roller, in contact with the area to be formed.
  • any deformations or curvatures in the sections of the profile located between the tool groups can be achieved through a corresponding relative movement of the tool groups taking into account the material characteristics, such as the yield strength, the young modulus, the Poisson coefficient.
  • the profile is not formed in the region of the tool groups during the forming operation according to the invention described so far during the relative movement of the tool groups relative to one another.
  • the tool groups are moved along at least one space axis (X,Y,Z) linearly and/or in a rotatively manner about at least one space axis (X,Y,Z).
  • the tool groups are moved along at least two space axis (X,Y,Z) linearly and/or in a rotatively manner about at least two space axis (X,Y,Z).
  • the method according to the invention comprises more than two tool groups which are spaced from one another, the case in which for example three or four tool groups which are spaced from one another are provided is obviously also included.
  • a desired forming can be achieved in each case for example in the respective regions between the tool groups in one and the same method step.
  • it is likewise not required during the forming operation to move the hollow metallic profile element into the region of the corresponding forming tools through a feed movement.
  • the hollow profile, after being positioned is fixed in regions during the forming sequence.
  • the spacing between the tool groups during the forming with respect to a neutral fibre or a neutral axis of the extruded profile changes in such a manner that the length of the neutral fibre or the neutral axis is enlarged or reduced or the position of the neutral fibre changed.
  • a tapering or enlargement of the profile cross section of the hollow profile can take place.
  • the invention is to be expressly not limited to such cases in which forming of part sections of the hollow metallic profile element takes place exclusively in the regions between the individual tool groups which are moveably arranged relative to one another. Accordingly, it is provided in a preferred embodiment of the method according to the invention that, prior to the moving of the tool groups relative to one another, the hollow metallic profile element is additionally formed within a tool group, in particular for forming a curvature running in an axis of the extruded profile. This means that the tool elements of the tool group concerned have a shape or inner contour that is adapted to the form of the curved section of the hollow metallic profile element.
  • Said additional forming is made possible by the displacement of the said shaped tool elements with respect to the tool group, said shaped tool elements displacing simultaneously or one after the other.
  • Said displacement of shaped tool elements takes place along the initial straight part of the hollow metallic profile element to be formed.
  • the part length of the hollow metallic profile element within the tool group concerned is provided with a curvature corresponding to the shape of the tool elements. Following the forming of the curvature, the relative movement of the tool groups relative to one another subsequently takes place in order to achieve the deformation between the tool groups, in the freely arranged region to obtain the formed hollow profile.
  • the invention also comprises a device as defined by claim 7.
  • At least the two tool groups are moveably arranged relative to one another and capable in moving in at least one linear direction and/or pivotable in or about at least one axis of rotation.
  • the tool groups are linearly movable by means of an adjusting drive along at least two space axis (X, Y, Z) and/or pivotable about at least two space axis (X, Y, Z).
  • the formed hollow profile obtained by the method of the invention or produced by means of a device for carrying out the method according to the invention is used in an automotive structure, preferably as a bumper.
  • a formed hollow profile 1 is shown in front view and top view respectively. This type of shape can be employed in the region of a vehicle front of a motor vehicle, as a bumper.
  • the formed hollow profile 1 consists of metal, in particular of an aluminium alloy and is obtained from an extruded profile.
  • the formed hollow profile 1 is arranged symmetrically to a centre plane 2 and in front view has a middle region 3 and two edge regions 4, which are each formed linearly.
  • the middle region 3 is equipped with a height offset h, which can typically amount up to 100 mm, relative to the edge regions 4.
  • a height offset h which can typically amount up to 100 mm, relative to the edge regions 4.
  • at least two sections 5, 6, each with a same or different curvature radii r 1 and r 2 are provided in each case.
  • the two edge regions 4, such as in particular evident by the representation of Fig. 2 , are arranged inclined by an angle ⁇ with respect to the middle region 3.
  • the middle region 3 is set back with a depth offset t, which can amount up to 100 mm, relative to the two front face sections 7, 8 of the formed hollow profile formed hollow profile 1.
  • Fig. 3a to 3d typical cross sections through a formed hollow profile 1 described so far are shown.
  • the profile height H of the formed hollow profile 1 typically amounts to between 40 mm and 200 mm.
  • the profile thickness T of the formed hollow profile 1 typically amounts to approximately between 20 mm and 60 mm.
  • the cross section can be subdivided into profile chambers by at least one profile web 9.
  • the formed hollow profile 1 is subdivided into two chambers by a profile web 9
  • Fig. 3c by using two profile webs 9 the cross section of the formed hollow profile 1 is subdivided into three profile chambers.
  • a total of six profile chambers are provided wherein the number of the profile chambers is merely restricted by the number of profile webs 9 or by the production technology.
  • a device 10 for producing a formed hollow profile (1) is shown, wherein for the sake of simplicity the formed hollow profile (1) produced by means of the device 10 differs in its geometry or its cross section from the formed hollow profile (1) corresponding to Fig. 1 and 2 .
  • the device 10 exemplarily comprises three tool groups 11 to 13, which likewise merely exemplarily are arranged symmetrically to a symmetry plane 15.
  • the two tool groups 12 and 13 are arranged symmetrically or on opposite sides of the (central) tool group 11.
  • the tool group 11 comprises a lower tool element 16 and an upper tool element 17, which are exemplarily attached to a lower mounting unit 18 or an upper mounting unit 19.
  • the device 10 is easily modifiable with little tool changing effort to permit to obtain different forms of formed hollow profile (1).
  • the two tool elements 16, 17 of the tool group 11 are exemplarily arranged moveably relative to one another in each case in the direction of the double arrows 21, 22 between an opened position and a closed position. Furthermore, the two tool elements 16, 17 seen in longitudinal direction are each equipped with a curved or bent contour 26, 27 viewed on sides facing one another. From the representation of Fig. 7 , the cross section of the hollow metallic profile element 25, initially used to obtain the formed hollow profile (1) is positioned within a lower mounting 28 or an upper mounting 29 of the two tool elements 16, 17 with tool elements 16, 17 which are together located in the closed position. Said positioning can be done in such way that either profile 25 is completely embedded within the lower or upper mounting or it can be embedded partially, i.e.
  • the hollow metallic profile element 25 exemplarily has a rectangular cross section without profile webs 9.
  • the hollow metallic profile element is fixed in a forced based manner a part of the cross section of the hollow metallic profile element (25), on a given length.
  • the two tool groups 12, 13 are exemplarily identically constituted and each has a lower tool element 31 and an upper tool element 32, which are likewise moveably arranged in the direction of the double arrows 33, 34 relative to one another between an opened position shown in Fig. 4 and a closed position shown in Fig. 5 .
  • it is provided according to Fig. 4 with tool elements 31, 32 spaced from one another that the two tool groups 12, 13 are arranged about an angle ⁇ relative to a vertical.
  • the tool elements 31, 32 are each preferentially replaceably arranged on a lower mounting unit 35 or an upper mounting unit 36 analogously to the tool group 11.
  • the tool elements 31, 32 each also have a contour which is not shown in detail, which with closed tool elements 31, 32 makes possible, to embed at least partly, preferentially completely, the cross section of the hollow metallic profile element 25.
  • a part of the cross section of the hollow metallic profile element 25 is fixed by the tool elements 31, 32 of the tool groups 12, 13 in a forced based manner, on a given length of the hollow metallic profile element 25.
  • the tool elements 31, 32 or their mounting for the hollow metallic profile element 25 which are not shown in detail are designed linearly or without curvature, which means that the hollow metallic profile element 25 arranged between the tool elements 31, 32 is not formed within the tool elements 31, 32.
  • the tool groups 12, 13, which are arranged on both sides of the middle tool groups 11, are adjustably arranged relative to the tool group 11.
  • the tool elements 31, 32 and the mounting elements 35, 36 respectively are each coupled to an adjusting drive 40 which is merely shown symbolically.
  • the adjusting drive 40 can for example be designed as a hydraulic, electric or pneumatic adjusting drive 40 and is activated by means of a control device 41.
  • the control device 41 preferentially also controls the movement of the tool elements 16, 17 of the tool group 11 and of the tool elements 31, 32 of the tool groups 12, 13.
  • the adjusting drive 40 makes possible a movement or adjustability of the tool groups 12, 13 relative to the tool group 11 in and about the three space axes X, Y, Z, i.e. a linear or pivot or turning movement of the tool groups 12, 13.
  • the tool groups 12, 13 and their tool elements 31, 32 respectively are arranged spaced from the tool group 11 in such a manner that between the tool groups 11 to 13 in each case a section 42, 43 of the hollow metallic profile element (25) is provided which in each case is freely arranged, i.e. not in contact with one of the tool groups 11 to 13.
  • the profile element 25 which is initially straight is positioned between the opened tool elements 16, 17 and 31, 32. This can be effected both manually and also by means of a handling robot which is not shown. Following this, the two tool elements 16, 17 of the tool group 11 are moved against one another. In the process, the tool elements 16, 17 come into contact or into operational connection with the profile element 25 and the same is provided through the mountings 28, 29 with a curvature corresponding to the contour 26, 27.
  • the two tool groups 12, 13 can move in the direction of the two other space axes X, Y or to turn about said space axes X, Y, or perform a movement of the middle tool group 11 (for the purpose of which the same is coupled to the adjusting drive 40), in order to be able for example to obtain a formed hollow profile (1), formed in multiple space axes for example corresponding to the representation of Fig. 1 and 2 .
  • the hollow metallic profile element 25 initially positioned within the tool elements is kept fixed; no movement of it is needed to insure the forming.
  • the device 10 described so far can be variously modified without deviating from the inventive idea.
  • it can be provided to perform further mechanical process steps such as punching, attaching connecting elements or similar on the formed hollow profile 1 before or after the forming.
  • the formed hollow profile 1 is not formed symmetrically to the centre plane 2. The asymmetry in this case is to comprise different bending courses and/or different bending angles on the formed hollow profile 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP16750653.4A 2015-07-29 2016-07-25 Method and device for producing a formed hollow profile Active EP3328567B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15178974 2015-07-29
PCT/EP2016/067679 WO2017017062A1 (en) 2015-07-29 2016-07-25 Method and device for producing a formed hollow profile

Publications (2)

Publication Number Publication Date
EP3328567A1 EP3328567A1 (en) 2018-06-06
EP3328567B1 true EP3328567B1 (en) 2021-11-17

Family

ID=53762068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16750653.4A Active EP3328567B1 (en) 2015-07-29 2016-07-25 Method and device for producing a formed hollow profile

Country Status (6)

Country Link
US (1) US20180214928A1 (zh)
EP (1) EP3328567B1 (zh)
CN (1) CN107921507B (zh)
HU (1) HUE056932T2 (zh)
MX (1) MX2018001162A (zh)
WO (1) WO2017017062A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111842660B (zh) * 2020-07-06 2022-06-07 昆山华致精密模具有限公司 一种双弧度保险杠的成型模具组合及成型工艺
CN111872177A (zh) * 2020-07-17 2020-11-03 李淑军 一种适用于不锈钢管生产加工的管道折弯设备
US11890663B2 (en) * 2020-09-23 2024-02-06 Mahle International Gmbh Device and method for opening folded heat exchanger cores

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB441522A (en) * 1935-04-11 1936-01-21 Fairey Aviat Co Ltd Improvements in or relating to means for bending small tubes, pipes, and the like
FR832536A (fr) * 1937-05-14 1938-09-28 Machine à cintrer les tuyaux
US4077813A (en) * 1976-07-26 1978-03-07 Nasa Method of producing complex aluminum alloy parts of high temper, and products thereof
US5836193A (en) * 1996-11-27 1998-11-17 Aluminum Company Of America Apparatus for forming elongated metal articles and related method
DE10246977B4 (de) 2002-10-09 2007-06-28 Thyssenkrupp Steel Ag Vorrichtung zum 3D-Freiformbiegen von Profilen
US7077439B2 (en) 2003-08-25 2006-07-18 General Motors Corporation Vehicle bumper and method of making same
DE102004015073B3 (de) * 2004-03-25 2005-10-06 Langenstein & Schemann Gmbh Vorrichtung und Verfahren zum Biegen eines Werkstücks
ITTO20070235A1 (it) * 2007-03-30 2008-09-30 Co Proget S R L Apparato per la piegatura e la stiratura di profilati in materiale resistente, in particolare paraurti di veicoli in ferro o acciaio, e relativo metodo di piegatura e stiratura di detti profilati
DE102008006293A1 (de) 2008-01-28 2009-07-30 Patentgesellschaft Maranatha Verfahren und Vorrichtung zum Biegen von Rundrohren und Profilen
US8333095B2 (en) 2009-09-21 2012-12-18 Shape Corp. Roll former with three-dimensional sweep unit
KR20130109583A (ko) * 2012-03-28 2013-10-08 주식회사 성우하이텍 벤딩 프레스 장치
CN203917526U (zh) * 2014-03-21 2014-11-05 官伟齐 一种双车式弯管机
CN104307983B (zh) * 2014-10-08 2016-08-24 中国航空工业集团公司北京航空制造工程研究所 一种柔性包容结构、多点型材拉弯模具及拉弯成型方法

Also Published As

Publication number Publication date
EP3328567A1 (en) 2018-06-06
HUE056932T2 (hu) 2022-03-28
MX2018001162A (es) 2018-04-20
CN107921507A (zh) 2018-04-17
WO2017017062A1 (en) 2017-02-02
US20180214928A1 (en) 2018-08-02
CN107921507B (zh) 2020-10-16

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