EP2569108A1 - Procédé de cintrage et dispositif de cintrage - Google Patents

Procédé de cintrage et dispositif de cintrage

Info

Publication number
EP2569108A1
EP2569108A1 EP11718357A EP11718357A EP2569108A1 EP 2569108 A1 EP2569108 A1 EP 2569108A1 EP 11718357 A EP11718357 A EP 11718357A EP 11718357 A EP11718357 A EP 11718357A EP 2569108 A1 EP2569108 A1 EP 2569108A1
Authority
EP
European Patent Office
Prior art keywords
bending
sheet
die
pivoting element
bent
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
EP11718357A
Other languages
German (de)
English (en)
Other versions
EP2569108B1 (fr
Inventor
Michael Schott
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel Europe AG
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 ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Priority to PL11718357T priority Critical patent/PL2569108T3/pl
Publication of EP2569108A1 publication Critical patent/EP2569108A1/fr
Application granted granted Critical
Publication of EP2569108B1 publication Critical patent/EP2569108B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/042—With a rotational movement of the bending blade

Definitions

  • the present invention relates to a bending method and a bending device with a bending punch and a die having a bending edge. Likewise, a use of the bending process is the subject of the invention.
  • Pre-roll 120 ° to 135 ° before the sheets can finally be connected by the actual folding to about 180 ° fixed to the structural element.
  • at least three steps are required for the production of a rabbet joint.
  • the sheets need not necessarily be connected to a structural element. Folding can also be used to produce less sharp edges
  • the object of the invention is to specify a bending method with which sheet metal elements with overhanging sections can be produced in a process-reliable manner with reduced plant and cost expenditure.
  • this object is procedurally achieved by a bending process in which by moving together a die having a bending edge and a pivot member having
  • Bending portion of the sheet is bent around the bending edge of the die.
  • the collapse may be due to movement of the punch relative to a stationary die or movement of the die relative to a fixed punch
  • a first embodiment provides that a contact portion of the pivoting element is brought into contact with the holding portion of the sheet and by the pivoting of the
  • Sheet is applied, which has an angle to the bending edge, lying in the plane of the holding portion component. In this way, the available power for the deformation of the sheet metal can be better utilized. It engages in a more favorable angle to the bending portion and thus allows an even softer forming of the bending section. In extreme cases, it is also conceivable to use the force in a
  • the contact section of the pivoting element is unrolled during bending on the holding section of the metal sheet.
  • Rolling motion can be the appearance of scratches or
  • the sheet is held by a hold-down on the die during bending.
  • a movement of the sheet during the forming process can be prevented, so that the dimensional accuracy of the bent sheet can be improved.
  • the method can be further developed by bending the bending section of the sheet by a bending angle of more than 90 °, more than 105 °, more than 120 °, up to 135 ° around the bending edge. At a bending angle of more than 90 °, even with a spring-back sheet material
  • Sheet metal parts are provided with a vertical fold.
  • a bending by a bending angle of more than 105 ° makes it possible in a particularly simple manner, in the formed acute angle of 75 °, a structural element
  • a composite sheet, a solid sheet or a lightweight sheet is bent.
  • Composite sheets are multilayer sheets in which at least two layers are made of different materials. Typically, for example, layers of
  • Composite sheets can result in weight savings compared to a solid sheet for the same thickness.
  • composite sheets are in particular such sheets in question, consisting of two outer cover plates, for example made of steel and a layer connecting them from a
  • the thickness of the cover sheets is for example 0.30 to 2.00 mm; the thickness of the layer of plastic, for example 0.05 to 1.5 mm.
  • steel sheets consist of a
  • the thicknesses of the steel sheets are 0.1 mm to 0.3 mm.
  • As a core layer can be
  • thermoplastic material for example.
  • the thermoplastic material is characterized not only by a good ümformhus, especially at higher
  • Lightweight sheet significantly simplify.
  • a lightweight sheet offers very good stiffness especially weight advantages.
  • a development provides that after bending the bending section of the sheet to a first bending angle of the bending portion of the sheet to a second angle
  • Delayed delamination becomes an unintentional Separating the inner cover plate and / or the outer
  • Cover sheet of the composite sheet of the inner cover plate and the outer cover plate connecting plastic layer understood, which does not have to be done directly when bending, but also can occur only after a certain time.
  • an embodiment of the bending process provides that the sheet is folded.
  • the folding allows on the one hand from the sheet metal components with rounded and thus less
  • Rivets, adhesives or solders are needed. The costs and the work involved in the production of sheet metal components can thus be further reduced.
  • Bending punch has a pivotally mounted pivoting member having a contact portion and a forming section, the pivoting element is pivotable by contact of the contact portion with a holding portion of a sheet to be bent and, by exercising by pivoting the ümformabten a force on the bending portion of the sheet to be bent, which a angled to the bending edge, lying in the plane of the holding portion component, the
  • Bending section of the sheet to be bent around the bending edge of the Matrix is bendable.
  • the device makes it possible to better utilize the available for the deformation of the sheet force. You can attack at a more favorable angle to the bending section to be bent, so that a softer forming can be guaranteed.
  • a first embodiment provides that the contact section and the forming section of the pivoting element are rigidly connected to each other.
  • the rigid connection allows a particularly simple construction of the device and thus a cost-effective device.
  • the rigid connection of the contact portion with the forming section the reliability of the device and thus the
  • the device can be further, by the pivoting element is mounted with a pivot axis in the bending punch.
  • the pivot axis stationary or movable relative to the bending punch.
  • a movably arranged pivot axis allows a simple construction of the die of the
  • Pivoting axis in the bending punch is movable in the radial direction and the pivoting element of a guide element, in particular on its outer contour, is feasible, the
  • This embodiment of the bending device allows a particularly gentle on the surface
  • the pivot axis is aligned parallel to the bending edge
  • the device can also be embodied by virtue of the fact that the bending device has a hold-down device. This allows to accurately fix the holding portion of a sheet to be bent and thus to achieve a particularly high dimensional accuracy with respect to the bent sheet metal.
  • the bending edge of the die may be provided with a recess extending along the bending edge.
  • a compressive load and on the outside of the sheet to a corresponding tensile load.
  • the recess material of the sheet can be added and thus the compressive and tensile loads are reduced. The danger of a
  • Plastic layer and / or between plastic layer and outer cover plate and plastic layer are effected. This may increase the risk of cracking the outside lying cover plate can be reduced when folding composite sheets.
  • the bending device can be characterized in that the bending edge of the die is interchangeable.
  • Bending device can thus be easily adapted to different bending radii and different bending angles. Also in this way both bending edges with a recess running along the bending edge and bending edges which have no such recess can be used in the same bending device.
  • the above-mentioned object has been achieved in that the bending method is used to produce a vehicle element, in particular an end wall element and / or hood element.
  • Fig. 1 is a schematic representation of a first
  • Fig. 2 is a schematic representation of a second
  • Fig. 3 shows an embodiment of an inventive
  • FIG. 4 is a schematic representation for illustrating a further, optional step of the bending process.
  • Fig. 1 is an embodiment of a
  • the bending punch 4 has a pivoting element 3 with a contact section 8 and a forming section 9 rigidly connected to the contact section 8.
  • Fig. La the state of the bending device to
  • a plate 6 is held with its holding portion 5 by a hold-down 10 on the die 2 that it projects laterally with its bending portion 7 on the interchangeable bending edge 1 of the die 2 addition.
  • the sheet metal 6 shown is a solid sheet 6.
  • the contact portion 8 of the pivot member 3 is brought into contact with the holding portion 5 of the sheet 6 and the pivot member 3 is pivoted.
  • the bending section 7 of the sheet 6 is bent by a bending angle ⁇ of 130 ° about the bending edge 1 of the die 2.
  • the pivoting element 3 is mounted with a pivot axis 11 in the bending punch 4.
  • the pivot axis 11 is aligned parallel to the bending edge 1.
  • the pivot axis 11 can move in the bending punch 4 in the radial direction.
  • the pivoting element 3 is guided with a guide element 12, so that the contact portion 8 of the pivoting element 3 can roll on the holding portion 5 of the sheet 6.
  • the Surface of the holding portion 5 of the sheet 6 is thus protected during bending.
  • Embodiment is the guide member 12, with which the rotational movement of the pivot member 3 with the
  • Swivel element 3 cooperates.
  • other types of coupling for example via gears and racks are conceivable.
  • pivot axis 11 can also, as indicated by dashed lines in Fig. La, relative to the bending punch 4 are arranged stationary and thus a bending device with an increased rigidity are provided.
  • Fig. 2 shows the same bending device as Fig. 1, in which the die 2 ', however, a bending edge 1' with a along the bending edge 1 'extending recess 14'.
  • the technical effect of this recess 14 "during bending is explained with reference to a composite sheet 6 '.
  • the outer cover plates 16 ', 17' of the composite sheet 6 ' are made of a steel sheet having a thickness of 400 .mu.m and connected to each other via a middle, consisting of a viscoelastic plastic layer 18' of 25 microns.
  • Holding portion 5 'and bending portion 7' causes delamination.
  • the tensile load on the outer cover plate 17' is reduced, so that the risk of occurrence of cracks in the outer cover plate 17 'is reduced after bending. This is particularly important when the composite sheet 6 'is folded in the connection.
  • FIG. This shows a section of a vehicle element 15 '' in the form of a hood. This has a composite sheet 6 '' and a structural element 19 '' on.
  • Composite sheet 6 '' was first bent in accordance with the procedure shown in FIG. 2 by a bending angle of more than 90 ° and the inner cover sheet 16 '' by delamination in the transition region of holding section 5 '' and bending section 7 '' of the plastic layer 18 '' separated. In the formed acute angle of the composite sheet 6 '' was then a
  • Structural element 19 '' arranged and connected by folding the composite sheet 6 '' this fixed to the structural element 19 ''.
  • the outer cover plate 17 '' has no cracks even after the 180 ° fold.
  • Fig. 4 a device is shown, the
  • the device has for this purpose a frame 20 ''', with the angle ß''' is given to the bending portion 7 '''of the sheet 6 '''to be bent back.
  • the frame 20 ''' serves at the same time to hold the sheet 6''' on the machine table 21 '''.
  • each of these two functions it is also possible for each of these two functions to have their own
  • a punch 22 '' ' is provided, with which the force required for bending in the sheet 6' '' is initiated.
  • the punch 22 '' ' is driven either hydraulically or pneumatically.
  • an electric motor e.g. For example, a linear motor to provide for this purpose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L'invention vise à mettre au point un procédé de cintrage permettant de réaliser par un processus fiable des éléments en tôle avec des tronçons cintrés tout en réduisant la complexité de l'installation et les coûts. A cet effet, le procédé de cintrage selon l'invention comprend les étapes suivantes : sous l'effet du mouvement de rencontre d'une matrice (2) munie d'un bord de cintrage, et d'un poinçon (4) muni d'un élément pivotant (3), ledit élément pivotant (3) est amené en contact avec un tronçon de retenue (5) d'une tôle (6) placée entre la matrice (2) et le poinçon (4), l'élément pivotant (3) pivote sous l'effet de la mise en contact avec le tronçon de retenue (5) de la tôle (6), et, sous l'effet du pivotement de l'élément pivotant (3), un tronçon à cintrer (7) de la tôle (6) est courbé autour du bord de cintrage (1) de la matrice (2).
EP11718357.4A 2010-05-12 2011-05-04 Procédé de pliage et appareil de pliage Active EP2569108B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11718357T PL2569108T3 (pl) 2010-05-12 2011-05-04 Sposób zginania i urządzenie zginające

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010016914A DE102010016914A1 (de) 2010-05-12 2010-05-12 Biegeverfahren und Biegevorrichtung
PCT/EP2011/057155 WO2011141339A1 (fr) 2010-05-12 2011-05-04 Procédé de cintrage et dispositif de cintrage

Publications (2)

Publication Number Publication Date
EP2569108A1 true EP2569108A1 (fr) 2013-03-20
EP2569108B1 EP2569108B1 (fr) 2014-03-12

Family

ID=44275959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11718357.4A Active EP2569108B1 (fr) 2010-05-12 2011-05-04 Procédé de pliage et appareil de pliage

Country Status (6)

Country Link
EP (1) EP2569108B1 (fr)
DE (1) DE102010016914A1 (fr)
ES (1) ES2467146T3 (fr)
PL (1) PL2569108T3 (fr)
PT (1) PT2569108E (fr)
WO (1) WO2011141339A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2985441A1 (fr) * 2012-01-09 2013-07-12 Peugeot Citroen Automobiles Sa Systeme a came pour le pliage d'une tole
DE102012103543A1 (de) 2012-04-23 2013-10-24 Thyssenkrupp Steel Europe Ag Verfahren und Vorrichtung zum Biegen eines Leichtblechs
EP2841217B1 (fr) 2012-04-23 2017-11-29 ThyssenKrupp Steel Europe AG Procédé de fléchissement d'une tôle composite
DE102012106420A1 (de) 2012-07-17 2014-01-23 Thyssenkrupp Steel Europe Ag Verfahren und Vorrichtung zum Biegen eines Leichtblechs
DE102013108702B4 (de) * 2013-08-12 2015-02-19 Thyssenkrupp Steel Europe Ag Verfahren zum Verbinden eines Sandwichbleches mit einem metallischen Bauteil und Karosserieteil mit einem Sandwichblech als Außenblech und einem metallischen Bauteil
JP2020093304A (ja) 2014-04-01 2020-06-18 株式会社アマダ プレスブレーキ用金型及びヘミング加工方法
CN104722613B (zh) * 2015-03-13 2017-06-06 江门市南洋船舶工程有限公司 用于制作船舶电缆托架的折角加工装置
DE102020214784A1 (de) 2020-11-25 2022-05-25 Volkswagen Aktiengesellschaft Verfahren und Vorrichtung zum Umformen eines Bauteils

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365500A (en) * 1981-01-30 1982-12-28 Chesley F. Carlson Company Web bending fixture
JPS59197318A (ja) * 1983-04-21 1984-11-08 Daihatsu Motor Co Ltd プレス用金型
DE3739173A1 (de) * 1987-11-19 1989-06-01 Feintool Int Holding Verfahren und vorrichtung zum biegen von werkstuecken
JPH01138020A (ja) * 1987-11-24 1989-05-30 Kyowa Mach Kk 板金の曲げプレス加工装置
JPH01143722A (ja) * 1987-11-30 1989-06-06 Maru Kikai Kogyo Kk 折曲げ型
JPH05305342A (ja) * 1992-04-24 1993-11-19 Anritsu Corp プレス機械の金型装置
US5361620A (en) * 1993-07-02 1994-11-08 Meadows John L Method and apparatus for hemming sheets of metal material
DE10111134C1 (de) * 2001-03-08 2002-07-04 Bayerische Motoren Werke Ag Verfahren zum Abkanten eines Bleches und Vorrichtung zur Durchführung des Verfahrens
DE10223637B4 (de) 2002-05-28 2007-11-08 Pass Stanztechnik Ag Biege-Werkzeug

Non-Patent Citations (1)

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Title
See references of WO2011141339A1 *

Also Published As

Publication number Publication date
PT2569108E (pt) 2014-06-09
DE102010016914A1 (de) 2011-11-17
PL2569108T3 (pl) 2014-08-29
WO2011141339A1 (fr) 2011-11-17
ES2467146T3 (es) 2014-06-12
EP2569108B1 (fr) 2014-03-12
DE102010016914A9 (de) 2012-04-19

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