EP2726227A2 - Dispositif de pliage pour une presse à cintrer et procédé de pliage - Google Patents

Dispositif de pliage pour une presse à cintrer et procédé de pliage

Info

Publication number
EP2726227A2
EP2726227A2 EP12742779.7A EP12742779A EP2726227A2 EP 2726227 A2 EP2726227 A2 EP 2726227A2 EP 12742779 A EP12742779 A EP 12742779A EP 2726227 A2 EP2726227 A2 EP 2726227A2
Authority
EP
European Patent Office
Prior art keywords
press
folding
bending
end position
punch
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
EP12742779.7A
Other languages
German (de)
English (en)
Other versions
EP2726227B1 (fr
Inventor
Richard Edlbauer
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.)
Trumpf Maschinen Austria GmbH and Co KG
Original Assignee
Trumpf Maschinen Austria GmbH and Co KG
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 Trumpf Maschinen Austria GmbH and Co KG filed Critical Trumpf Maschinen Austria GmbH and Co KG
Publication of EP2726227A2 publication Critical patent/EP2726227A2/fr
Application granted granted Critical
Publication of EP2726227B1 publication Critical patent/EP2726227B1/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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means

Definitions

  • the invention relates to a folding device for a bending press, in particular for a press brake, and to a method for performing a folding by means of a bending press, in particular a press brake, as specified in claims 1 and 13.
  • folding devices for bending presses are known, which have special and complex upper parts. and lower tools require. These special, sometimes multi-stage tools are often relatively expensive. In many cases, these folding devices require a tool change or a displacement of the lower tool tray before a folding can be performed. This results in an increased set-up time during a manufacturing or machining process. For the activation or movement of the folding tools, additional drives and locking devices are sometimes required.
  • the pure processing time is usually considerably increased, since the pressing beam of the bending press usually has to be lowered twice in succession and at least partially raised again.
  • the present invention has for its object to provide a folding device for a bending press, in particular for a press brake, which allows shorter set-up and processing times and at the same time keeps the tooling costs low. Moreover, it is an object of the invention to provide a method for performing a folding by means of a bending press, in particular a press brake, with which the stated objects are achieved.
  • the first object of the invention is achieved by a folding device according to the features in claim 1.
  • the movable pressing beam of the bending press is provided with an upwardly directed, in particular horizontal, bearing surface for the workpiece, and a stamping surface which is parallel to and aligned with the bearing surface is disposed above it.
  • Support surface and embossing surface together form the folding device of the bending press and in an upper end position or end position of the press beam, the two surfaces touch each other or form a gap of less than 0.5 mm.
  • the support surface and the embossing surface are now moved towards one another and, in particular, pressed against one another and the workpiece is provided with a folding bender.
  • the bending device of the bending press comprising a bending punch and a bending die is formed independently of the folding device comprising the support surface and the embossing surface.
  • the bearing surface of the folding device is formed on the pressing beam of the bending press, so that a part of the press beam is used as a folded seam. Due to the independence of the bending device and the folding device a very flexible and optimized design of the two devices is possible on the respective purpose.
  • a simple and compact design of the folding device is possible, which is optimally adapted to the desired folding process.
  • a separate, special folding tool is not necessary and a conversion of the bending press between the bending operation and the folding process, in particular a change of the upper and / or lower tools or a displacement of the lower tool tray is not necessary.
  • a bending press with the specified folding device thus has shorter set-up or changeover times and does not require complicated, expensive and / or only suboptimal usable for folding special tools.
  • a particularly surprising advantage of a bending press with the specified folding device is the reduction of the processing time compared to the known from the prior art bending presses, which are also used for folding and thereby doing an additional press beam movement, in particular a second movement of the press bar down.
  • Such additional pressing beam movement is not necessary with the specified folding device and therefore the processing time is reduced, since with the pressing beam movement upwards, which must also be carried out when carrying out a bending operation alone, the folding operation is performed at the same time.
  • the folding device thus allows the operation of a bending press for bending and folding of workpieces with reduced set-up, conversion and processing times and also avoids the use of complex and expensive additional or special tools, especially in the implementation of the folding process. This allows a more efficient and cost-effective operation of the bending press.
  • An advantage of this is an embodiment according to claim 2, characterized in that a displacement of the support surface for the workpiece is achieved down, so that the workpiece by a user of the bending press in a simple manner and in particular from the location at which he is also at Performing a bending process is located on the support surface is positionable. Since the lower edge of the frame upper part is often not accessible to an operator without aids and this lower edge defines the lowest position of the embossing surface in a folding device in which no folding punch is present, such an embodiment would have to use an automated bending press with a bending robot come because this can reach the area at the lower edge of the frame shell or the top of the press beam in its upper end position or end position due to its greater radius of action.
  • a fundamental advantage is further that in the folding device of the bending punch of the bending press is not used at the same time as a hemming, as a more flexible, simpler and more compact design of the folding device is possible.
  • a folding device integrated in the pressing beam in which the bearing surface of the folding device lies substantially in one plane with the in particular two drive cylinders of the pressing beam and thus no lever moment on the pressing beam or during the folding operation
  • the drive cylinder acts.
  • no protruding extensions are formed on the pressing beam, which could collide with a workpiece, for example, and that no additional components are required in the production of the pressing beam with integrated folding device.
  • the soil in the recess sided support surface is easily accessible through the front and / or rear opening in the corresponding side surface of the press beam.
  • Another advantage is the measures according to claim 7, as this one hand, in a simple manner, a stop for the workpiece is created in the recess and on the other hand penetration of any kind of foreign bodies on the rear opening in the recess is completely prevented.
  • the measures according to claim 8 since this gives a symmetrical and very stable cross-section of the press beam.
  • the folding punch whose stamping surface on the underside and the bearing surface in the recess of the pressing beam, seen in cross-section, can be exactly aligned with the center axes of the particular two drive cylinders of the pressing beam. are arranged, whereby a lever moment about the longitudinal axis of the press beam is substantially excluded during folding.
  • the mechanical load, in particular the piston of the drive cylinder of the press beam is reduced.
  • Another advantage is an embodiment according to claim 9, since thereby a sliding along side surfaces of the folding punch and the press bar is reduced to a minimum and thereby mechanical abrasion or abrasion effects are particularly inferred. Likewise, a good orientation is created by a visible positioning of the folding punch or the lower part of the folding die on the pressing beam for the operator of the folding device, where exactly the workpiece or semi-finished must be positioned on the support surface so that it is folded by the approaching embossing surface , This is therefore particularly easy to recognize for the operator of the folding device in such a configuration, since even with completely lowered press beams, the support surface for the workpiece and the embossing surface must be spaced vertically only to the extent that the workpiece to be folded between these two surfaces can be positioned ,
  • Another advantage is the measures of claim 12, since a very flexible folding device is created, with the particular several different folding operations without tool change are feasible.
  • the measures according to claim 15 are advantageous since this speeds up the production process for a combined bending and folding workpiece, since the bending or folding process and the subsequent folding process on the pre-bent semifinished product are used to produce the bent and folded finished product in a single operation becomes.
  • the workflow includes a movement of the press bar down and a movement of the press bar upwards. An intermediate storage of semi-finished product is thereby avoided, which also reduces the logistical effort in the production of the bending Falzwerk GmbH.
  • Figure 1 is a front view of a bending press with a folding device in the form of a recess in the pressing beam.
  • Fig. 2 is a sectional view of the press beam of the bending press of Fig. 1 in the region of
  • Folding device along the line II-II; 3 is a front view of a bending press with a folding device with a plurality of pairs of a support surface and a corresponding embossing surface in different embodiments.
  • FIG. 4 shows a sectional view of the press beam of the bending press from FIG. 3 in the region of the first pair of a bearing surface and a corresponding embossing surface along the line IV-IV;
  • FIG. 5 shows a sectional view of the press beam of the bending press from FIG. 3 in the region of the second pair of a bearing surface and a corresponding embossing surface along the line V-V;
  • Fig. 6 is a front view of a bending press with a folding device according to another alternative embodiment
  • Fig. 7 is a sectional view of the press beam of the bending press of Fig. 6 in the region of the other alternative folding device along the line VII-VII.
  • the bending press 1 is basically constructed of a fixed frame shell 5 and an associated fixed frame base 6.
  • the lower frame 6 is designed in the form of a table and rests stable with its underside on a bottom-level riot level, in particular on the floor of a workshop building.
  • a bending die 7 is arranged, which has an accessible from above, V-shaped recess or groove.
  • a bending punch 8 is countersunk into the V-shaped recess of the bending die 7, and a workpiece 4 placed on the upper side of the bending die 7, between the bending die 7 and the punch 8, is bent or folded.
  • the punch 8 is connected via a coupling means 14 fixed to a pressing bar 9, which pressing bar 9 in turn by a drive means, in particular of two drive cylinders 10, 11 via two drive pistons 12, 13, vertically moved up and down.
  • the drive means moves or guides the pressing bar 9 and thus the bending punch 8 in the vertical direction between an upper end position (top dead center) and a lower end position (bottom dead center), preferably in the lower end position of the bending operation is performed ,
  • the bending punch 8 can be made in one piece if, for example, very wide workpieces 4 are to be processed, or it can also be made split, as shown inter alia in Fig. 1.
  • the smaller pressing surface of such a split punch 8 allows for the same pressing force a higher bending pressure on the workpiece 4.
  • the drive cylinder 10, 11 are fixedly connected to the frame upper part 5.
  • the frame upper part 5 comprises a transverse bar which is arranged parallel to the pressing beam 9 and above it.
  • the embossing surface 16 and the support surface 15 move apart and are thus spaced such that in particular the pre-bent or vorgekann- tete workpiece 4 between the embossing surface 16 and support surface 15 can be positioned.
  • the support surface 15 and the embossing surface 16 move toward each other again and provide the workpiece 4 positioned therebetween with the folding bender 3.
  • the folding device 2 is equipped with a folding punch 18, on the underside of the embossing surface 16 is formed.
  • the folding punch 18 is fixedly connected to the frame upper part 5 and is above a lower edge 19 of the upper frame part 5 down in the direction of the pressing bar 9 and the support surface 15 of the workpiece 4 from.
  • an elongate, in particular milled recess 20 is formed in the press beam 9, whose bottom end surface forms the bearing surface 15 for the workpiece 4.
  • the recess 20 is accessible via a front opening 21 in a front side surface 22 and / or via a rear opening 23 - see FIG. 5 - in a rear side surface 24 of the press beam 9.
  • the recess 20 is accessible only via the front opening 21, since the back of the recess 20 is closed by a rear end wall 25.
  • the folding punch 18 projects through the slot 26 into the recess 20 and into the bearing surface 15 of the recess 20 and the embossing surface 16 of the folding punch 18 approach each other at least up to the minimum gap 17. As a result, the workpiece 4 positioned on the support surface 15 is folded.
  • the recess 20 and the support surface 15 of the folding device 2 along a width 27 of the press beam 9 is arranged in its central portion. It is also expedient to extend the recess 20 or the support surface 15 to a maximum of 1/5 of the width 27 of the press beam 9. Likewise, it is expedient to arrange the support surface 15 of the workpiece 4 and thus, for example, the recess 20 of the press beam 9 vertically seen in the middle third of a height 28 of the press beam 9.
  • FIGS. 3 to 5 show a bending press 1 with further exemplary embodiments of a folding device 2 for producing a folding barb 3 on a workpiece 4.
  • the folding device 2 in FIG. 3 has two pairs of a contact surface 15 and a corresponding embossing surface 16.
  • left pair of the support surface 15 and the embossing surface 16 of the folding punch 18 is executed divided and arranged on or in front of the front side surface 22 of the press bar 9, as best seen in the sectional view in Fig. 4.
  • the folding punch 18 is divided into an upper part 29 and a lower part 30.
  • the upper part 29 of the folding punch 18 is fixedly connected to the frame upper part 5 and has an underside 31.
  • the underside 31 of the upper part 29 of the folding punch 18 presses an upper side 32 of the lower part 30 of the folding punch 18 and thus the lower part 30 of the folding punch 18 downwards in the direction of or towards on a projection 33.
  • the projecting extension 33 is at the front whose side surface 22 of the press beam 9 is formed and an upper side of the extension 33 forms the bearing surface 15 for the workpiece 4.
  • the workpiece 4 positioned between the stamping surface 16 of the lower part 30 of the seaming punch 18 and the bearing surface 15 of the extension 33 thus becomes in the upper end position or end position of the press bar 9 is provided with a Falzbug 3.
  • the lower part 30 of the folding punch 18 is further supported or mounted on guide bars 34 and spring elements 35 in the vertical direction movable on the pressing bar 9. Does the upper part 29 of the folding die 18 with its bottom 31 is not on the top 32 of the lower part 30 of the seaming die 18, the spring elements 35 press the lower part 30 of the seaming die 18 up against stops 36 and the lower part 30 of the seaming die 18th is in a rest position in which the embossing surface 16 and the support surface 15 are spaced from each other. In particular, when the pressing bar 9 is lowered and is in its lower end position or end position, the lower part 30 of the folding punch 18 is in the rest position.
  • the entire folding punch 18 separated from the frame upper part 5 it is also possible to perform the entire folding punch 18 separated from the frame upper part 5 and to store in the vertical direction movable on the pressing beam 9 and to support.
  • the movable folding punch 18 is then pressed from a lower side 37 of the frame upper part 5 against the force of the spring elements 35 from a rest position in the direction of the support surface 15 of the workpiece 4.
  • a bearing surface 15 and an embossing surface 16 which is shown on the right side of the press beam 9 in Fig. 3 and in a sectional view in Fig. 5, the folding punch 18 in one, to one side of the press beam 9 out open groove 38 are moved.
  • the groove 38 opens at its lower end into the recess 20, which in this case can be reached from the front side surface 22 of the press beam 9 via a front opening 21 and from the rear side surface 24 of the press beam 9 via a rear opening 23.
  • the support surface 15 on the bottom side of the recess 20 for receiving the workpiece 4 is extended by a projecting extension 39, so that the workpiece 4 can be positioned as easily and safely during folding in the folding device 2.
  • FIGS. 6 and 7 show an embodiment of a folding device 2 which has no folding punch 18 on the upper frame part 5 and no cutout 20 or no extension 33, 39 on the pressing bar 9. Rather, in this folding device 2 forms a top 40 of the press beam 9, the support surface 15 for the workpiece 4 and a portion of the bottom 37 of the frame top 5, the embossing surface 16 of the folding device. 2
  • FIGS. 1 and 2; 3 to 5; FIGS. 6 and 7 form the subject matter of independent solutions according to the invention.
  • the relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.
  • Reference numeral bending press 26 slot

Landscapes

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

Abstract

L'invention concerne un dispositif de pliage (2) pour une presse à cintrer (1), la presse à cintrer (1) étant équipée d'un poinçon de pliage (8) et d'une barre de pression (9) disposée au-dessus de ce dernier et permettant de guider le relevage et l'abaissement du poinçon de pliage (8) dans la direction verticale. L'essentiel de l'invention est que la barre de pression (9) présente une surface d'appui (15) notamment horizontale, qui est destinée à une pièce (4) et qui est orientée vers le haut, et que soit disposée au-dessus de cette dernière une surface d'estampage (16) qui est parallèle à la surface d'appui (15) et qui est tournée vers cette dernière, la surface d'estampage (16) et la surface d'appui (15) étant en contact ou formant un interstice (17) inférieur à 0,5 mm lorsque la barre de pression (9) est dans une position terminale supérieure, et la surface d'estampage (16) et la surface d'appui (15) étant espacées lorsque la barre de pression (9) est abaissée. L'invention concerne également un procédé de pliage mettant en œuvre une presse à cintrer (1), ledit procédé comportant une opération de pliage au cours d'un mouvement ascendant de la barre de pression (9). On dispose ainsi d'un dispositif de pliage (2) et d'un procédé de pliage qui permettent de réduire les temps de préparation et d'usinage tout en conservant de faibles coûts liés aux outils.
EP12742779.7A 2011-07-01 2012-06-28 Presse à cintrer avec un dispositif de pliage et procédé de pliage Active EP2726227B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT9672011A AT511621B1 (de) 2011-07-01 2011-07-01 Falzvorrichtung für eine biegepresse und verfahren zur durchführung einer falzung
PCT/AT2012/050089 WO2013003876A2 (fr) 2011-07-01 2012-06-28 Dispositif de pliage pour une presse à cintrer et procédé de pliage

Publications (2)

Publication Number Publication Date
EP2726227A2 true EP2726227A2 (fr) 2014-05-07
EP2726227B1 EP2726227B1 (fr) 2016-05-18

Family

ID=46603455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12742779.7A Active EP2726227B1 (fr) 2011-07-01 2012-06-28 Presse à cintrer avec un dispositif de pliage et procédé de pliage

Country Status (3)

Country Link
EP (1) EP2726227B1 (fr)
AT (1) AT511621B1 (fr)
WO (1) WO2013003876A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT515130B1 (de) * 2013-12-04 2015-08-15 Trumpf Maschinen Austria Gmbh Biegepresse

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2652886A1 (de) * 1976-11-20 1978-05-24 Weinbrenner Paul Maschbau Biegebearbeitungseinrichtung
CH655874A5 (de) * 1982-06-07 1986-05-30 Haemmerle Ag Maschf Werkzeugeinrichtung an einer abkantpresse.
US4805438A (en) 1987-03-05 1989-02-21 Metal Building Components Incorporated Hemming die fixture for metal presses
EP0332221A3 (fr) * 1988-03-11 1991-03-13 Josef Niedermaier Machine à plier
JP2556816Y2 (ja) * 1991-08-21 1997-12-08 株式会社松川機械製作所 板体折曲機の下駒支持装置
DE4315706C2 (de) * 1993-05-13 1996-02-01 Haemmerle Ag Abkantpressen zur Bildung von Falznuten an Blechprofilen
JPH10137852A (ja) * 1996-11-11 1998-05-26 Murai Kogyo Kk 折り曲げ、平押し金型
AT505656B1 (de) * 2008-02-19 2009-03-15 Trumpf Maschinen Austria Gmbh Falzvorrichtung für eine biegepresse, insbesondere abkantpresse
AT507911B1 (de) * 2009-03-04 2010-11-15 Trumpf Maschinen Austria Gmbh Verfahren zum freibiegen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013003876A2 *

Also Published As

Publication number Publication date
EP2726227B1 (fr) 2016-05-18
WO2013003876A2 (fr) 2013-01-10
AT511621A1 (de) 2013-01-15
AT511621B1 (de) 2013-04-15
WO2013003876A3 (fr) 2013-06-20

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