EP2674231B1 - Dispositif destiné au pliage de pièces métalliques - Google Patents

Dispositif destiné au pliage de pièces métalliques Download PDF

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Publication number
EP2674231B1
EP2674231B1 EP20120172085 EP12172085A EP2674231B1 EP 2674231 B1 EP2674231 B1 EP 2674231B1 EP 20120172085 EP20120172085 EP 20120172085 EP 12172085 A EP12172085 A EP 12172085A EP 2674231 B1 EP2674231 B1 EP 2674231B1
Authority
EP
European Patent Office
Prior art keywords
bending
die
spacers
transverse direction
tools
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
EP20120172085
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German (de)
English (en)
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EP2674231A1 (fr
EP2674231B8 (fr
Inventor
Gerrit Gerritsen
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.)
Bystronic Laser AG
Original Assignee
Bystronic Laser 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 Bystronic Laser AG filed Critical Bystronic Laser AG
Priority to EP20120172085 priority Critical patent/EP2674231B8/fr
Publication of EP2674231A1 publication Critical patent/EP2674231A1/fr
Application granted granted Critical
Publication of EP2674231B1 publication Critical patent/EP2674231B1/fr
Publication of EP2674231B8 publication Critical patent/EP2674231B8/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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/02—Die constructions enabling assembly of the die parts in different ways
    • 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0227—Length adjustment of the die

Definitions

  • the invention relates to a device for bending metal parts according to the preamble of claim 1.
  • US 5,249,452 A describes a device for bending metal parts, in which two part tools with bending areas are adjustable at a distance from one another via a worm mechanism.
  • the sub-tools are each supported directly on a table.
  • a distance between a fixed, lateral stop of the table and the part tools can be adjusted via a plurality of spacers stacked one above the other.
  • a disadvantage of the known solution is its complex structure and the complex handling.
  • a simple adjustment of a lateral position of at least one of the sub-tools can be realized. For example, this can be accomplished by changing the position of the at least one spacer without having to remove or add parts. This facilitates the adjustment work in general and especially in the case of large and heavy spacers and part tools.
  • a lower tool in the context of the invention is generally the lower part or the lower die of a bending device, in particular a bending bench to understand.
  • a corresponding upper tool is provided, which is moved to bend the workpiece against the die.
  • the die is moved and the upper tool is fixed.
  • metal sheets are bent with a device according to the invention.
  • the die or the lower tool consists of at least two partial tools, which are variably spaced in a generally horizontally oriented transverse direction of the table. This does not exclude in particular that the table can be fitted in an alternative assembly version with matrices without a variable distance, whereby the universal applicability is increased.
  • the lateral position of a sub-tool by a lateral force component of the bending process is at least partially introduced into the spacer.
  • a bending region of the sub-tools is at least a part of the tool surface to understand, which interacts directly with the metal part to be bent.
  • Such bending areas regularly have a defined shape, z. B. a certain radius of curvature, and other properties such as a certain hardness.
  • the part tool can be composed of several parts, wherein, for example, the bending area is provided as a fixed or replaceable component.
  • a plurality of spacers is arranged between at least one of the sub-tools and the table, wherein a projecting guidance of the sub-tool engages in a provided between the spacers, changeable in the transverse direction of the table gap.
  • a projecting guide is provided on a separate, arranged between the spacers component, said guide engages in a corresponding recess, for example a groove in the part tool.
  • the separate component forms a guide for the part tool in the context of the invention.
  • the guide is formed as a solid unit with the support region of the sub-tool.
  • a stack closed in the transverse direction of the table can be formed by the plurality of spacers and the guide of the part tool. This allows a particularly compact and secure recording of the sub-tools.
  • an additional clamping in the transverse direction is made possible when needed in a simple manner.
  • Under a closed stack according to the invention is a filling of a given in the transverse direction of the table distance by spacers and guides to a predetermined Understimulation to understand. The undersize is used for easy installation and / or clearance compensation. If required, it can be bridged by a clamp.
  • the table comprises a support surface which is extended in the transverse direction and the longitudinal direction and which has two rigid edge-side boundaries in the vertical.
  • the table geometry allows a particularly universal use.
  • the table has a medium, rigid bridge.
  • each of the sub-tools can be supported separately from the other in a closed stack of spacers. In particular, this can be done by means of a provided if necessary clamping member.
  • the table comprises a clamping device acting on the spacer and at least one of the sub-tools in the transverse direction of the table.
  • a clamping device acting on the spacer and at least one of the sub-tools in the transverse direction of the table.
  • this may be a transversely acting, hydraulically driven clamping member, whereby high and well adjustable clamping forces can be achieved.
  • an adjustable lower tool with two unchangeable spaced bending areas can be used on the table.
  • this may be a one-piece bending tool.
  • Such invariable lower tools are regularly present in existing bending devices, so that the use of an inventive device can be made particularly universal and using existing tools.
  • an adapter piece between the spacer and the adjustable lower tool is arranged.
  • the bending force of the lower tool is completely passed into the adapter piece.
  • Such an adapter piece may, for example, keep the unconfigurable lower tool centered over a mid-perpendicular of the table. If the table has a central, rigid web, the adapter piece can be arranged above the web in order, for example, to allow any, in particular centric, arrangement of the adjustable lower tool.
  • the two sub-tools can be positioned either asymmetrically or symmetrically with respect to a bisector of the table.
  • an upper tool is preferably movable in each case along the mid-perpendicular.
  • a higher flexibility can be achieved by the asymmetrical arrangement depending on the bending task. For example, by asymmetrical arrangement with respect to the perpendicular bisector or a lateral position of the upper tool a particularly deep U-profile can be bent from a sheet without the legs of the profile collide with the upper tool.
  • At least one of the sub-tools has a second bending region, which is wider in relation to its bending region.
  • the bending regions preferably have a different shape in order to fulfill different bending tasks with regard to the radius of curvature, plate thicknesses or the like.
  • the various bending regions may be present on opposite sides of the part tool.
  • the respectively desired bending region can be brought into use by simply turning the partial tool around a vertical axis or else about a longitudinal axis.
  • the part tool about the vertical axis by 180 °, the same bearing surface and a possible guidance of the Sub-tool used identically.
  • a substantially flat portion is arranged on the partial tools, wherein by means of the bending areas and the flat portions a flattening or pressing of a metal part is made possible. This allows an even more flexible use of the inventively designed device.
  • the support area of one of the sub-tools is formed in one piece in the longitudinal direction.
  • the entire part tool can be integrally formed in the longitudinal direction.
  • the one-piece design in the longitudinal direction does not exclude that the part tool is constructed in a longitudinal direction to the longitudinal sectional plane of several elements. In particular, this can be a division into the support area and into the bending area.
  • the bending area may be made of a harder material and / or be replaceable.
  • the object of the invention is also achieved by the use of an inventive device for bending thick metal sheets, wherein a thickness of the metal sheet is in particular not less than 5 mm, preferably not less than 8 mm.
  • a thickness of the metal sheet is in particular not less than 5 mm, preferably not less than 8 mm.
  • the bending of such thick metal sheets requires particularly large bending tools, so that costs and effort compared to conventional devices for bending thick sheets is saved by the flexible inventive design.
  • a bending force of an upper tool is at least about 1000 kN / m.
  • the associated dimensioning of the spacers, which also support the bending force according to the invention in the vertical direction, can be optimally combined with an arrangement between the part tool and the table.
  • Fig. 1 shown device according to the invention comprises a table 1, which is mounted stationary.
  • the table 1 extends substantially prismatically in a longitudinal direction perpendicular to the plane of the drawing.
  • a transverse direction of the table 1 extends horizontally in the plane of the drawing.
  • a vertical direction perpendicular to the longitudinal direction and the transverse direction corresponds to the direction of gravity.
  • the table 1 is made in a known manner and generally in the manner of steel tool tables.
  • the table 1 has a support surface 2 which extends in the transverse direction and in the longitudinal direction. From the bearing surface 2 rise two rigid, edge-side boundaries 3 and a middle, rigid web 4.
  • the central web 4 is arranged centrally about a perpendicular bisector M of the table 1.
  • the boundaries 3 and the web 4 each have vertical side surfaces 3a, 3b, 4a. By the side surfaces 3a, 3b, 4a of the boundaries 3 and the web 4, the support surface 2 is divided into a left support region 2a and a right support region 2b.
  • the spacers 5 are formed as a prismatic body of rectangular cross-section which is integral in the longitudinal direction.
  • a plurality of sections may be arranged one behind the other in the longitudinal direction.
  • spacers 5 are provided in each support area 2a, 2b, wherein the exact number is arbitrary depending on the requirements.
  • the spacers 5 are each directly on the table 1.
  • a summed width of the spacers 5 in the transverse direction of the table 1 is smaller than the width of the support region 2 a and 2 b between the stationary side surfaces 3 this difference remains a gap or a groove extending in the longitudinal direction, in each of which a guide 6a, 7a of a lower tool can engage.
  • the sub-tool comprises a first sub-tool 6 and a second sub-tool 7.
  • the sub-tools 6, 7 are formed as prismatic longitudinal body having on an underside each have a support portion with a support surface 6b, 7b and from the support surface 6b, 7b projecting guides 6a, 7a ,
  • Each of the sub-tools 6, 7 has at least one bending region 6c, 7c which extends over the length of the sub-tool 6 or 7 and in the transverse direction over a defined part of an upper edge.
  • the bending areas 6c, 7c have defined rounding and hardening in the present case. Such bending areas 6c, 7c are often also referred to as inlet radii.
  • Fig. 3 shows a representation in which also an upper tool 8 and a workpiece 9 are shown made of sheet metal, wherein the upper tool 8 with a bending area (upper tool radius) 8a and the sub-tools 6, 7 with the bending portions 6c, 7c on the workpiece 9 attack.
  • a vertical component is introduced into the spacer 5.
  • a transverse component of the table 1 or horizontal component is also received by at least one of the spacers 5.
  • Fig. 1 These are each the two outer spacers 5, which are inserted between the guide 6a, 7a and the boundaries 3.
  • the guides 6a, 7a have the same cross-sectional shape and height as the spacers 5.
  • the height can either be the same, so that the guides 6a, 7a contribute to the vertical support of the sub-tools 6, 7, or the guides 6a, 7a may have a smaller height, so that only the wings 6b, 7b extending beside the guides 6a, 7a introduce the vertical bending force into the spacers 5.
  • the web 4 and the boundaries 3 have the same height as the spacers 5, so that the wings 6 b, 7 b can overlap these flush. This easily allows an enlargement of the adjustment range in the transverse direction. But it can also be provided that the web 4 and / or the boundaries 3 have a greater or smaller height.
  • Fig. 2 is a changed position of the spacers 5 and thus the sub-tools 6, 7, which corresponds to a maximum distance of the sub-tools 6, 7.
  • the guides 6a, 7a are now directly on the side surfaces 3a, 3b of the boundaries 3 at.
  • Fig. 1 is a position with the present second smallest distance of the sub-tools 6, 7 shown.
  • a total of four different positions of the sub-tools 6, 7 can be realized without changing the spacers 5.
  • simple position change can z. B. by raising the sub-tools 6, 7 and a subsequent displacement of the spacers 5 in the transverse direction.
  • FIG. 4 and FIG. 5 show the table 1 and the spacers 5 in the position Fig. 2 omitting the sub-tools 6, 7.
  • a hydraulic clamping member 10 is present in each of the outer boundaries. 3 intended.
  • Fig. 3 shows the clamping in the open state, so that the sub-tools 6, 7 can be freely inserted or removed.
  • Fig. 4 shows the clamping member 10 in the closed or activated state, wherein a hydraulically acted bar in each case protrudes from the side surface 3a, 3b.
  • the clamping is directed in each case against a transverse component of the bending force. This does not mean that this force component is supported by the clamp. Rather, the geometry of the sub-tools 6, 7 and their bearing surfaces is designed so that at least a majority of this force is intercepted by friction.
  • the clamping can also act in the same direction, such as the clamping member 10 is disposed on the central web 4.
  • asymmetrical arrangement of the sub-tools 6, 7 with respect to a perpendicular bisector M of the device can also be arranged asymmetrically, such as Fig. 3 shows.
  • the upper tool 8 is moved unchanged in the mid-perpendicular M above the web 4.
  • the workpiece 9 shown is a thick sheet of more than 8 mm wall thickness, which in the present case is bent into a U-profile.
  • a leg 9a of the U-profile pointing towards the upper tool 8 can be made longer by the lateral or asymmetrical offset of the partial tools 6, 7.
  • the sub-tools 6, 7 in addition to a first bending region 6c, 7c each have a further bending region 6d, 7d.
  • the bending areas 6c, 7c and 6d, 7d are formed on opposite upper edges of the sub-tools 6, 7.
  • the Bending areas 6c, 7c, 6d, 7d differ in the present case by different radii of curvature. In the arrangement according to Fig.
  • the first bending areas 6c, 7c are directed to the workpiece with a large radius of curvature.
  • the second bending regions 6d, 7d are directed with a smaller radius of curvature to the workpiece.
  • Fig. 8 shows the device after Fig. 1 , in turn, differently shaped part tools 6, 7 are used.
  • flat or straight in the present case vertical sections 11 are provided beneath the bending regions 6c, 7c, by means of which a workpiece can be flattened or pressed in conjunction with a suitable upper tool.
  • the flat portions 11 serve to guide the upper tool.
  • the sub-tools 6, 7 are presently set at a minimum distance from each other.
  • Fig. 9 shows the device Fig. 1 , wherein the sub-tools 6, 7 are replaced by an adapter 12.
  • the adapter 12 has an upper-side recess 12a into which a conventional lower tool 13 with a conventional guide 13a is inserted.
  • the conventional lower tool 13 is presently designed as a one-piece lower tool with two invariably spaced bending regions 13b.
  • a support surface 12b of the adapter 12 in the present case has only one guide 12c, which is guided only in one of the receiving regions 2b between the spacers 5.
  • the adapter piece 12 and the lower tool 13 are arranged symmetrically with respect to the mid-perpendicular M, wherein the adapter piece engages in particular over the central web 4 and thus enables the conventional lower tool 13 to be held in the central position.
  • an asymmetric positioning is possible as needed.

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

Claims (14)

  1. Dispositif pour le pliage de pièces métalliques, en particulier de tôles, comprenant une table (1) s'étendant dans une direction longitudinale pour réceptionner et supporter des efforts d'un outil inférieur (6, 7, 13), une première partie d'outil (6) et au moins une deuxième partie d'outil (7) de l'outil inférieur et une pièce d'écartement (5) mobile : un écart des deux parties d'outil (6, 7) dans une direction transversale de la table (1) pouvant varier de manière réglable à l'aide de la pièce d'écartement (5), chacune des parties d'outil (6, 7) comprenant une zone de support (6a, 7a, 6b, 7b) avec une surface de support (6b, 7b) par l'intermédiaire de laquelle une composante perpendiculaire d'une force de pliage est appliquée à la table (1) ; et chacune des parties d'outil (6, 7) comprenant une zone de pliage (6c, 7c), laquelle coopère avec une pièce métallique (9) à plier, caractérisé en ce que la pièce d'écartement (5) est disposée entre la surface de support (6b, 7b) et la table (1) et en ce qu'au moins une partie de la composante perpendiculaire de la force de pliage est appliquée à la pièce d'écartement (5).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'une pluralité des pièces d'écartement (5) est disposée entre au moins l'une des parties d'outil (6, 7) et la table (1), un guidage en saillie (6a, 7a) de la partie d'outil (6, 7) étant en prise dans un espace changeable en direction transversale de la table (1) prévu entre les pièces d'écartement (5).
  3. Dispositif selon la revendication 2, caractérisé en ce que, grâce à la pluralité des pièces d'écartement (5) et au guidage (6a, 7a) de la partie d'outil (6, 7), il est possible de former une pile fermée en direction transversale de la table (1).
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la table (1) comprend une surface d'appui (2) étendue en direction transversale et longitudinale, laquelle présente, à la verticale, au moins deux délimitations (3) rigides du côté du bord et en particulier une nervure (4) rigide centrale.
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la table (1) comprend un dispositif de serrage (10) agissant en direction transversale sur la pièce d'écartement (5) et au moins l'une des parties d'outil (6, 7), en particulier sous la forme d'un organe de serrage (10), agissant en direction transversale, pouvant être commandé hydrauliquement.
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'un outil inférieur (13) non réglable, en particulier d'une seule pièce, peut être utilisé avec deux zones de pliage (13b) espacées de manière non modifiable sur la table (1).
  7. Dispositif selon la revendication 6, caractérisé en ce qu'un adaptateur (12) est disposé entre la pièce d'écartement (5) et l'outil inférieur (13) non réglable.
  8. Dispositif selon la revendication 7, caractérisé en ce que la force de pliage est entièrement appliquée de l'outil inférieur (13) à l'adaptateur (12).
  9. Dispositif selon l'une des revendications précédentes, caractérisé en ce que les deux parties d'outil (6, 7) peuvent être positionnées au choix de manière non symétrique ou symétrique par rapport à une médiatrice (M) de la table (1), moyennant quoi en particulier un outil supérieur (8) peut se déplacer le long de la médiatrice.
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'au moins l'une des parties d'outil (6, 7) présente une deuxième zone de pliage (6d, 7d) plus étendue par rapport à sa zone de pliage (6c, 7c), moyennant quoi en particulier les zones de pliage (6c, 7c ou 6d, 7d) présentent une forme différente.
  11. Dispositif selon l'une des revendications précédentes, caractérisé en ce que respectivement un tronçon sensiblement plat (11) est disposé au niveau des parties d'outil (6, 7), moyennant quoi il devient possible d'aplatir ou serrer une pièce métallique à l'aide des zones de pliages (6c, 7c) et des tronçons plats (11).
  12. Dispositif selon l'une des revendications précédentes, caractérisé en ce que, au moins la zone de support (6a, 6b, 7a, 7b) de l'une des parties d'outil (6, 7), en particulier l'ensemble de la partie d'outil (6, 7), est réalisée d'une seule pièce dans la direction longitudinale.
  13. Utilisation d'un dispositif selon l'une des revendications précédentes pour le pliage de tôles métalliques (9) épaisses, une épaisseur de la tôle métallique (9) n'étant en particulier pas inférieure à 5 mm, en particulier pas inférieure à 8 mm.
  14. Utilisation selon la revendication 13, caractérisée en ce qu'une force de pliage d'un outil supérieur (8) est au moins d'environ 1000 kN/m.
EP20120172085 2012-06-14 2012-06-14 Dispositif destiné au pliage de pièces métalliques Active EP2674231B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20120172085 EP2674231B8 (fr) 2012-06-14 2012-06-14 Dispositif destiné au pliage de pièces métalliques

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Application Number Priority Date Filing Date Title
EP20120172085 EP2674231B8 (fr) 2012-06-14 2012-06-14 Dispositif destiné au pliage de pièces métalliques

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EP2674231A1 EP2674231A1 (fr) 2013-12-18
EP2674231B1 true EP2674231B1 (fr) 2014-09-17
EP2674231B8 EP2674231B8 (fr) 2014-11-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019090253A1 (fr) * 2017-11-03 2019-05-09 Accurpress America Inc. Procédé et machine de pliage de métal incluant une matrice ajustable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110743940A (zh) * 2019-10-28 2020-02-04 长兴飞祥钣金科技有限公司 一种用于加工钣金外壳的大型折弯机
AT524404B1 (de) * 2020-11-12 2023-09-15 Trumpf Maschinen Austria Gmbh & Co Kg Werkzeugeinsatz für Abkantpressen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU496072A1 (ru) * 1973-06-14 1975-12-25 Ленинградский Институт Точной Механики И Оптики Матрица универсального штампа дл гибки
AT342945B (de) * 1976-04-02 1978-04-25 Haemmerle Ag Maschf Biegewerkzeug
DE2815282A1 (de) * 1977-12-06 1979-06-07 Leleu Sa Marcel Biegewerkzeug fuer abkant- bzw. biegepresse
CH680772A5 (fr) * 1989-09-11 1992-11-13 Beyeler Machines Sa
US5249452A (en) 1993-02-17 1993-10-05 Caterpillar Inc. Adjustable master brake die

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019090253A1 (fr) * 2017-11-03 2019-05-09 Accurpress America Inc. Procédé et machine de pliage de métal incluant une matrice ajustable

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EP2674231A1 (fr) 2013-12-18
EP2674231B8 (fr) 2014-11-19

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