EP3320994A1 - Dispositif et procédé de cintrage bi- ou tri-dimensionnel au moyen d'une etape de roulage - Google Patents

Dispositif et procédé de cintrage bi- ou tri-dimensionnel au moyen d'une etape de roulage Download PDF

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Publication number
EP3320994A1
EP3320994A1 EP17400061.2A EP17400061A EP3320994A1 EP 3320994 A1 EP3320994 A1 EP 3320994A1 EP 17400061 A EP17400061 A EP 17400061A EP 3320994 A1 EP3320994 A1 EP 3320994A1
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EP
European Patent Office
Prior art keywords
profile
roller
rolled
rollers
rolling
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.)
Granted
Application number
EP17400061.2A
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German (de)
English (en)
Other versions
EP3320994B1 (fr
Inventor
Erman A. Tekkaya
Rickmer Meya
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.)
Technische Universitaet Dortmund
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Technische Universitaet Dortmund
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Publication of EP3320994A1 publication Critical patent/EP3320994A1/fr
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Publication of EP3320994B1 publication Critical patent/EP3320994B1/fr
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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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die

Definitions

  • the invention relates to a device for the planar or spatial bending of profiles by a rolling process according to the preamble of claim 1 and a method according to the preamble of claim 17.
  • the bending of high-strength materials is due to the increasing use of components with lightweight character growing importance, since such high-strength materials for the production of lightweight components are essential. At the same time, however, the bending of such high-strength materials poses great challenges to the process control. High deformation forces are required and the occurring form deviations are to be controlled. Especially the springback, which is caused by a high elastic elongation of high-strength materials, represents a great challenge in bending deformation.
  • the automotive industry demands a load-adapted design of the components with ever smaller tolerances of the bending geometry. This increasing complexity thus requires more flexible process control strategies for the bending process in order to minimize the set-up effort on the bending device.
  • Object of the present invention is therefore to eliminate the disadvantages of the bending method according to the prior art, to reduce the springback and thus to increase the bending accuracy, so that a robust bending process is possible, which bend and deform profiles very flexibly while maintaining the accuracy can.
  • the invention relates to a generic device for the planar or spatial bending of profiles by a rolling process, wherein matching at least one peripheral portion of the profile forming rollers are arranged adjacent to each other on the circumference of the profile.
  • a generic device is further developed according to the invention in such a way that at least one of the rollers with respect to the dimensions of their standing with the tread surface in touching contact roller peripheral surface is so resilient that the roller in mechanical contact with one or more adjacent to the profile itself rolling rolls their dimension changed parallel to their axis of rotation so that the adjacent rolling on the profile rolling rolls without mutual interference can transform the profile cornering.
  • the at least one flexible roller changes its width in such a way that the rollers rolling adjacent to the profile contact each other in a non-destructive manner in the forming zone of the profile and rotate in synchronism with one another.
  • This will prevent the destruction the rolls inevitably necessary in the prior art greatly reduced or completely closed gap between adjacent rolls, since the at least one resilient roll can always change in width so that they can contact non-destructively with the adjacent rolls and thereby these rolls in synchronism continuously be able to pass on to each other.
  • the material of the profile can always be transformed safely and defined.
  • the contact region between the at least one resilient roller and the rollers adjacent thereto is not located directly in a corner region of the cross section of the profile. Due to the fact that the rollers always coordinate with one another due to the at least one compliant roller, regardless of the respective fluctuating tolerances of the profile, the contact area of the rollers can also be set in such a way that not only points of contact but contact lines can be established. This can be used to allow the rollers to rotate past each other, almost overlapping each other, without causing undue destruction of the rollers.
  • the at least one flexible roller is formed from an elastically yielding material which is elastically deformable in its width.
  • a roll could be made, for example, from an elastically yielding material such as a plastic or the like. It would be particularly advantageous if such a material has an anisotropic compressibility, ie can be compressed more easily in the thickness direction than in the circumferential direction. This could be achieved, for example, by targeted reinforcement of such a material in the circumferential direction, for example by reinforcing elements.
  • the at least one compliant roller could be formed from at least two axially spaced apart roller discs, in which the at least two, axially spaced apart roller discs are fixed to each other in a further embodiment, that the coaxial distance of the roller discs is variable.
  • these roll disks can vary their distance from one another within predetermined dimensions depending on the rolling process and the tolerances of the profile and thus flexibly adapt the width of the flexible roll to the respectively adjacent rolls. This adjustment can be made continuously and so always ensure that the distance to the adjacent rolls is low or just zero.
  • the at least two, axially spaced-apart roller discs are formed so that between them at least one resilient intermediate element is arranged.
  • a resilient intermediate element between the mutually axially spaced roller discs provides almost automatically for the corresponding adjustment of the thickness of the compliant roller, since the compliant intermediate element is just as much reversibly compressed due to the contacts of the roller discs with the adjacent rollers, that the roller discs and the adjacent rollers non-destructively. If the contact situation changes, e.g. During rolling or due to changing tolerances of the profile, the compression of the resilient intermediate element adapts accordingly automatically.
  • the at least two, axially spaced apart roller disks project beyond the resilient intermediate element on the circumference.
  • the resilient intermediate element is received in the interior of the overhanging roll disks and is hidden and protected between the roll disks, so that the rolling process can not take any mechanical negative influence on the resilient intermediate element.
  • peripheral surfaces of the roller discs are formed flat or profiled.
  • the peripheral surfaces of the roller discs have a cylindrical-planar portion.
  • conical or, for example, curved-profiled sections on the circumference of the roll disks in order to be able to produce, for example, profiles with curved or conical cross-section sections.
  • the elastically deformable intermediate element may comprise an elastically deformable disc, which may be e.g. fully applied to the adjacent roll disks and supports them over the entire surface.
  • one or more elastically deformable spring elements between the adjacent roll disks, e.g. individual elastically deformable spring elements made of an elastically deformable material or spring elements made of metallic springs. It is particularly advantageous in this case if the plurality of elastically deformable spring elements are arranged symmetrically distributed between the at least two, axially spaced roller disks, since thereby the spring behavior of the compliant rollers is the same everywhere on its circumference.
  • the resilient intermediate element has an actively adjustable adjustment mechanism, with which the width of the flexible roller is variable. So could e.g. the intermediate element have pneumatic, hydraulic or electrical adjusting mechanisms, which can be caused by the compliance, but can also be actively changed.
  • the at least two, mutually axially spaced roller discs have mutually matching, facing each other arranged toothing structures, which always interlock during rolling regardless of the distance of the roller discs and guarantee a synchronization of the at least two roller discs during rolling.
  • the deformable intermediate element is protected inside the flexible roller between the adjacent roller disks, but on the other hand, only a narrow gap is visible on the circumference of the flexible roller, which rolls on the profile to be rolled between the circumferential surfaces of the roller disks.
  • the toothed structures ensure safe torque transmission the roller drive of the compliant roller on all the roller discs, since the toothing structures act as a number of carriers between the roller discs.
  • the at least one compliant roller is rotatably mounted about or relative to the longitudinal axis of the profile to be rolled. This makes it possible to ensure that the feed direction of the profile and the rolling direction of the roller arrangement are not aligned colinearly with respect to each other.
  • the rotatable mounting of the roller assembly is oriented so that it is arranged at an angle to the action of the feed device for advancing the profile to be rolled and thus to the longitudinal axis of the profile to be rolled obliquely, bending stresses are caused in the profile to be rolled, the lead to a pure bending of the profile.
  • the advanced profile is laterally deflected by the oblique arrangement of the rollers and thus bent in the forming zone.
  • a further bending device is arranged, which deflects the profile to be rolled and thus bends.
  • the further bending device may have a roll bending unit which protrudes into the feed path of the rolled profile and deflects the rolled profile so that the rolled profile is bent and / or twisted.
  • a further deformation possibility of the profile can be achieved in that the rotatable about the longitudinal axis of the profile to be rolled storage of the roller assembly together with the feed device for advancing the profile to be rolled to cause torsional stresses in the profile to be rolled, leading to a torsion of the profile to lead. If, for example, the rotatable mounting of the roller assembly is arranged rotated about the longitudinal axis of the profile and thus at an angle to the action of the feed device, torsional stresses are caused in the profile to be rolled, which lead to a pure torsion of the profile.
  • an internal mandrel is arranged in the forming area between the rollers for internal support of the profile and / or for reducing the wall thickness of the profile.
  • rollers are fixed and at least one oppositely acting roller is mounted on the profile to and away from the profile adjustable. As a result, the rolling forces can be safely removed with respect to the fixed roller.
  • the invention further relates to a method for the planar or spatial bending of profiles by a rolling process, in which are arranged to match two or more peripheral portions of the profile forming rollers on the periphery of the profile adjacent to each other.
  • a generic method is further developed according to the invention in such a way that at least one of the rolls is made so resilient with respect to the dimensions of its rolling peripheral surface in contact contact with the profile surface that the roll is in mechanical contact with one or more adjacent to the profile rolling rolls their dimension changed parallel to their axis of rotation so that the adjacent rolling on the profile rolling rolls without mutual interference can transform the profile cornering.
  • the cross-sectional dimensions of the profile are reduced at least in sections. It is possible not only to change the shape of the profile, but also at least in individual areas of the cross section to reduce this.
  • the compliant roller Due to the resilience of the at least one compliant roller and the resulting, non-destructive contact of the rollers with one another, different cross-sectional dimensions of the profile can be rolled with one set of rollers.
  • adjacent rollers not only touch selectively, but also have linear contact areas, which figuratively speaking, the compliant roller can operate within the peripheral surface of adjacent rollers.
  • polygonal, in particular rectangular or triangular profiles as profile cross sections. It is also conceivable that round profiles can be rolled as profile cross sections. Furthermore, polygonal, in particular rectangular or triangular profiles can be rolled from a round initial profile. Not only closed, but also semi-open or open profiles can be rolled in accordance with the invention.
  • FIG. 1 is a schematic representation of a roller assembly 2 in the inventive apparatus for roll bending a rectangular profile 1 by means of two compliant rollers 3 and two normal rollers 4 shown in a three-dimensional view.
  • the rectangular profile 1 is thereby by means of a not shown Feed device, such as a roller drive or the like.
  • Feed device such as a roller drive or the like.
  • FIG. 1 conveyed from behind between the roller assembly 2 and rolled within the roller assembly 2, primarily for the introduction of a in the FIG. 2 better recognizable bend.
  • the roller assembly 2 for bending rolls of the rectangular profile 1 is formed as a simple example geometry of any complex shaped real profile cross section of four rolls 3, 4, of which two rolls 4 are conventional rolls and two rolls 3 compliant rolls.
  • Each of the two compliant rollers 3 and the two normal rollers 4 face each other, wherein each of the rollers 3, 4 rolls an outer surface of the rectangular profile 1.
  • roller arrangement 2 according to the invention with the two resilient rollers 3 makes it possible for the rollers 3, 4 adjacent to one another to be operated in the contact area 11 to contact one another in a rolling manner and the distance between the respectively adjacent rollers 3, 4 can become zero.
  • the compliant rollers 3 are formed from at least two roller disks 5, which are mutually distinct spaced apart are fixed to each other.
  • an elastic disc 12 may be inserted from an elastically deformable material such as a plastic material.
  • This elastically deformable material of the disc 12 allows within certain limits a change in the distance of the roller discs 5 to each other and thus the thickness of the rollers 3, when in the axial direction of the roller bore 14 forces are exerted on the compliant rollers 3.
  • the elastically deformable material of the disc 12 is compressed by such forces and the distance between the roller discs 5 changes.
  • the compliant rollers 3 when rolling on the side surfaces of the rectangular section 1 so set in Anstellcardi 10 that they touch each other in the contact areas 11, so act exactly the forces on the edge regions of the resilient rollers 3, the one to Compression of the elastic disc 12 inside the roller discs 5 lead and the compliant rollers 3 adjust their thickness to exactly the distance between the normal rollers 4.
  • This adaptation takes place passively and permanently, so that even changes in the rolling process and about changing cross-sectional dimensions due to unavoidable tolerances of the rectangular profile 1 always leads to a corresponding change in thickness of the compliant rollers 3.
  • the nondestructively shaping rolling of the rollers 3, 4 successive in the contact area 11 is always made sure and the rectangular section 1 is properly rolled properly in the edges.
  • roller assembly 2 is again rotated in the simplest case relative to the feed direction 9 of the rectangular profile 1 about the vertical axis by the angle ⁇ , as in FIG. 5 is indicated.
  • the roller assembly 2 causes thrust forces within the rectangular profile 1, through which the rectangular profile 1 is bent as shown.
  • FIGS. 7 and 8 is another example of a roller assembly 2 according to the inventive device for rolling a triangular profile 1 in a spatial view and in a planar front view to recognize, in the back again in the contact area 11 between adjacent rollers 3, 4 these rollers 3, 4 nondestructively because the compliant roller 3 can automatically adjust its thickness as described above.
  • FIG. 9 shows an example of the operation of the device 2 according to the invention for roll bending and simultaneous torsional deformation accordingly FIG. 5 with resilient relative to the feed direction 9 of the rectangular profile 1 yielding rollers 4, 5.
  • both shear stresses and torsional stresses are generated in the rectangular profile, which cause both a bending deformation and a torsion of the rectangular profile.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP17400061.2A 2016-11-10 2017-11-09 Dispositif et procédé de cintrage bi- ou tri-dimensionnel au moyen d'une etape de roulage Active EP3320994B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016013672.3A DE102016013672A1 (de) 2016-11-10 2016-11-10 Vorrichtung und Verfahren zum ebenen oder räumlichen Biegen von Profilen durch einen Walzvorgang

Publications (2)

Publication Number Publication Date
EP3320994A1 true EP3320994A1 (fr) 2018-05-16
EP3320994B1 EP3320994B1 (fr) 2019-05-01

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EP17400061.2A Active EP3320994B1 (fr) 2016-11-10 2017-11-09 Dispositif et procédé de cintrage bi- ou tri-dimensionnel au moyen d'une etape de roulage

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EP (1) EP3320994B1 (fr)
DE (1) DE102016013672A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116274538A (zh) * 2023-02-10 2023-06-23 江苏新益机械有限公司 一种带有角度调节的型材弯曲机
EP4306263A1 (fr) * 2022-07-15 2024-01-17 Volkswagen Ag Procédé de fabrication d'une tige coulissante pour une direction de véhicule automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11156445A (ja) * 1997-11-28 1999-06-15 Sanko Metal Ind Co Ltd ロール成形機
WO2005070580A1 (fr) * 2004-01-24 2005-08-04 Palima W. Ludwig & Co. Appareil à plier doté de rouleaux compensateurs
EP1908536A1 (fr) * 2006-10-06 2008-04-09 Klingelnberg AG Dispositif pour le cintrage par fluoformage mécanisé de profilés
DE102007013902A1 (de) 2007-03-20 2008-09-25 Universität Dortmund Vorrichtung zum Profilbiegen
DE102007046870A1 (de) 2007-09-28 2009-04-09 Universität Dortmund Verfahren und Vorrichtung zur Umformung eines Stangenmaterials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1308472B1 (it) * 1999-05-04 2001-12-17 Tauring S P A Macchina curvatrice di tubi, profilati o similari

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11156445A (ja) * 1997-11-28 1999-06-15 Sanko Metal Ind Co Ltd ロール成形機
WO2005070580A1 (fr) * 2004-01-24 2005-08-04 Palima W. Ludwig & Co. Appareil à plier doté de rouleaux compensateurs
DE102004003681A1 (de) 2004-01-24 2005-08-11 Klingelnberg Ag Biegevorrichtung mit Pendelwalzrollen
EP1908536A1 (fr) * 2006-10-06 2008-04-09 Klingelnberg AG Dispositif pour le cintrage par fluoformage mécanisé de profilés
DE102007013902A1 (de) 2007-03-20 2008-09-25 Universität Dortmund Vorrichtung zum Profilbiegen
DE102007046870A1 (de) 2007-09-28 2009-04-09 Universität Dortmund Verfahren und Vorrichtung zur Umformung eines Stangenmaterials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
C. BECKER: "Inkrementelles Rohrumformen von hochfesten Werkstoffen", AACHEN, SHAKER, DORTMUNDER UMFORMTECHNIK, 2014, pages 79

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4306263A1 (fr) * 2022-07-15 2024-01-17 Volkswagen Ag Procédé de fabrication d'une tige coulissante pour une direction de véhicule automobile
CN116274538A (zh) * 2023-02-10 2023-06-23 江苏新益机械有限公司 一种带有角度调节的型材弯曲机
CN116274538B (zh) * 2023-02-10 2024-04-23 浙江鸿泰铝业有限公司 一种带有角度调节的型材弯曲机

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EP3320994B1 (fr) 2019-05-01
DE102016013672A1 (de) 2018-05-17

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