EP2329895B1 - Presse à cintrer et outil de cintrage doté d'un dispositif de retenue pour une pièce usinée - Google Patents

Presse à cintrer et outil de cintrage doté d'un dispositif de retenue pour une pièce usinée Download PDF

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Publication number
EP2329895B1
EP2329895B1 EP10189485.5A EP10189485A EP2329895B1 EP 2329895 B1 EP2329895 B1 EP 2329895B1 EP 10189485 A EP10189485 A EP 10189485A EP 2329895 B1 EP2329895 B1 EP 2329895B1
Authority
EP
European Patent Office
Prior art keywords
tool
workpiece
press brake
pressing
bending
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
EP10189485.5A
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German (de)
English (en)
Other versions
EP2329895A3 (fr
EP2329895A2 (fr
Inventor
Johann Mayrhofer
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 EP2329895A2 publication Critical patent/EP2329895A2/fr
Publication of EP2329895A3 publication Critical patent/EP2329895A3/fr
Application granted granted Critical
Publication of EP2329895B1 publication Critical patent/EP2329895B1/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts
    • 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
    • B21D37/08—Dies with different parts for several steps in a process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams

Definitions

  • the invention relates to a bending press, comprising a first tool and a second tool, which are displaceable from one rest position into a pressing position against each other to apply in the pressing position a pressing force on a arranged between the first tool and the second tool workpiece, wherein at least the first tool at least a first part and a second part. Furthermore, the invention relates to a tool for a bending press comprising at least a first part and a second part (see eg EP-A-1 658 908 ).
  • Presses are common in modern manufacturing processes. For example, presses are used for joining (e.g., press-fitting bushings), severing (e.g., cutting sheet metal strips), master forming (e.g., pressing powders into bodies), and forming (e.g., bending or deep-drawing sheets). Even these few examples show how versatile presses are used in technology.
  • the object of the invention is therefore to provide an improved bending press, in particular one in which a workpiece is held securely in a tool even when the pressing operation is interrupted.
  • the object is achieved in a bending press according to the prior art in that the second part is movable relative to the first part in a bending press of the type mentioned above, that it remains in the pressing position, there to exert a reduced holding force against the pressing force on the workpiece, if the first part is a) in the rest position or b) in an intermediate position between rest position and pressing position.
  • the object of the invention is also achieved by a tool for a Biesepresse of the type mentioned, in which the second part is resiliently mounted in the first part and slidably provided in a direction of movement provided for a bending movement.
  • a workpiece still remains in its intended for a bending operation position when this is relieved.
  • the result of the bending operation can be easily controlled and optionally repeated if the result is unsatisfactory.
  • the invention is suitable for bending presses, in which a discharge of the workpiece leads to a spring back of the same.
  • the correct bending angle can be measured on the finished unloaded workpiece, on the other hand, the bending process can be repeated or continued quickly from the same position of the workpiece, if there is a deviation of the measured bending angle of a target value.
  • the second part is movable independently of the first part.
  • the bending process can be made very flexible.
  • the first parts can be reduced to an arbitrary height, in order to ensure the best possible access to the workpiece, for example, when the first parts have moved far back, or to enable a quick resumption of the bending process with only a slight retraction of the first parts.
  • the second part is mounted on the first part.
  • the second part is automatically moved with the first part, which is particularly advantageous if a driver for the second part is designed such that the first and the second part are automatically aligned during the bending process.
  • a stop for the second part can be provided which is adjusted so that the first and the second part are aligned during the bending operation.
  • the second part is resiliently mounted is particularly advantageous.
  • the second part is still pressed against the workpiece when the first part is moved back to an intermediate position.
  • the applied holding force decreases with increasing distance between the first and second part. The said distance is thus a measure of the applied holding force.
  • An operator of the press can thus "visually see” the holding force. With a little practice, a certain holding power can be set specifically, if this is not already taken over by a control of the press.
  • the holding force of the second part is controlled such that it decreases with increasing distance between the first part and the second part.
  • a "virtual suspension” can be realized with the aid of a controller.
  • the force is reduced to the second part with increasing distance between the first part and the workpiece, for example by corresponding lowering of the pressure in the relevant hydraulic cylinder, so that said distance is again an optical indicator of the holding force.
  • first part and the second part have the same profile. In this way, the risk can be reduced that form on the workpiece unsightly imprints or marks.
  • Conceivable is a cylindrical pin with a hemispherical tip.
  • the embodiments show possible embodiments of a bending press according to the invention and an inventive.
  • Fig. 1 shows a schematically illustrated bending press 1 'in an oblique view according to the prior art with a first, upper tool 2' and a second, lower tool 3 '.
  • the first tool 2 ' is attached to an upper pressing bar 4, the second tool 3' to a lower pressing bar 5.
  • Both the first tool 2 ', and the second tool 3' each consist of several parts which are inserted in the respective pressing bars 4 and 5.
  • the tools 2 'and 3' are executed divided according to the prior art, especially because individual parts are easier and thus cheaper to produce on the one hand, but also because the bending press 1 'can be optimally adjusted to a certain workpiece length. Also, the bending press 1 'equipped for various bending operations be when different tools 2 'and 3' are inserted into the press beams 4 and 5.
  • the upper press bar 4 by means of a drive, not shown (eg hydraulic cylinder, spindle drive, etc.) are moved vertically, in this way, the two tools 2 'and 3' from a rest position into a pressing position against each other.
  • a drive not shown (eg hydraulic cylinder, spindle drive, etc.) are moved vertically, in this way, the two tools 2 'and 3' from a rest position into a pressing position against each other.
  • a drive not shown (eg hydraulic cylinder, spindle drive, etc.) are moved vertically, in this way, the two tools 2 'and 3' from a rest position into a pressing position against each other.
  • a drive not shown (eg hydraulic cylinder, spindle drive, etc.) are moved vertically, in this way, the two tools 2 'and 3' from a rest position into a pressing position against each other.
  • FIGS. 2a to 2d now show a bending press 1 according to the invention with a first tool 2a, which consists of several parts 2a 1 , 2a 2 and 2a 3 , and with a one-piece second tool 3. In the second tool 3, a still unshaped workpiece 8 is inserted.
  • the press 1 in the FIGS. 2a to 2d shown greatly simplified. For example, there is no pressing beam, frame and drive.
  • Fig. 2a are all parts of the first tool 2a 1 ..2a 3 in the rest position.
  • Fig. 2b are all parts of the tool 2a 1 ..2a 3 in the pressing position. Good to see that the workpiece 8 has already been deformed here.
  • Fig. 2c are the first parts 2a 1 and 2a 3 in an intermediate position provided between pressing position and rest position. The second part 2a 2 is still in the pressing position, but presses with a relation to the pressing force reduced holding force on the workpiece 8. Alternatively, the first parts 2a 1 and 2a 3 can also be moved to its rest position. This condition is in Fig. 2d shown.
  • the workpiece 8 is thus held in the lower tool 3, so that it can be controlled. For example, it can be checked whether the required bending angle has been achieved. In spite of accurate measurement of the pressing pressure, it is not possible or only with difficulty possible to achieve a desired bending angle, because inhomogeneities in the workpiece, for example, caused by a Rolling, or thickness differences always lead to deviations. If the bending angle is not correct, the workpiece 8, which is still held in the die, can be bent. In the Fig. 2c illustrated variant offers the advantage that the bend can be repeated relatively quickly, since the two parts 2a 1 and 2a 3 are only slightly raised. In the Fig. 2d illustrated variant, however, offers the advantage of better accessibility to the workpiece. 8
  • Fig. 3 now shows a first variant of a first tool 2b, which in turn consists of three parts 2b 1 ..2b 3 .
  • the two first, outer parts 2b 1 and 2b 3 correspond essentially to the prior art, the middle, second part 2b 2 is particularly constructed.
  • the actual punch (below) by means of a compression spring 9 is resiliently mounted on a linearly driven bar (top).
  • the second part 2b 2 can thus be moved independently of the other parts 2b 1 and 2b 3 .
  • the spring can also be omitted and a desired pressing force on the pressure on the part 2b 2 are set.
  • the second part 2b 2 is shown in the pressing position. It is good to see that all three parts 2b 1 ..2b 3 are aligned here.
  • Fig. 4 shows a further variant in which a tool 2c consists of a first part 2c 1 , in which two second parts 2c 2 and 2c 3 are resiliently mounted by means of a compression spring 9.
  • a tool 2c consists of a first part 2c 1
  • two second parts 2c 2 and 2c 3 are resiliently mounted by means of a compression spring 9.
  • the pressing force in the press position is transmitted from the first part 2c 1 to the second parts 2c 2 and 2c 3 , for example via a stop for the parts 2c 2 and 2c 3 .
  • the parts 2c 1 ..2c 3 are aligned, so that an optimal bending result can be achieved.
  • unsightly marks or marks may be created in the workpiece.
  • the second parts 2c 2 and 2c 3 should also be secured against falling out, so that they can not be detached from the first part 2c 1 even in the rest position.
  • Fig. 5 shows a first specific embodiment of a suspension for a first tool 2d, in which a punch (below) by means of disc springs 10 resiliently on an abutment (top) is sprung.
  • a punch below
  • disc springs 10 resiliently on an abutment (top) is sprung.
  • FIGS. 6 to 9 that applies the abutment as in Fig. 3 can be driven, but also as in Fig. 4 can be formed by the first part of the first tool.
  • Fig. 6 shows a further variant of a suspension in which the punch is mounted with tension springs 11 on an abutment.
  • Fig. 7 shows a further variant of a suspension in which the stamp is supported by means of a leaf spring 12 on an abutment.
  • Fig. 8 shows a further variant of a suspension in which the stamp is pneumatically mounted on the abutment.
  • the stamp is pneumatically mounted on the abutment.
  • air in a cylinder 13 a which is compressed by a piston 13 b.
  • a desired spring characteristic can be easily adjusted.
  • Fig. 8 but can also be understood as a possible variant of a hydraulic drive. In any case, supply and discharge lines for the hydraulic oil are to be provided here, since they can not be compressed or only minimally compressed.
  • Fig. 9 shows a variant of a suspension in which the stamp is hydro-pneumatic mounted on the abutment.
  • the stamp is hydro-pneumatic mounted on the abutment.
  • hydraulic oil in a cylinder 13 a which is displaced by a piston 13 b in a surge tank 14. There it compresses an air cushion.
  • a desired spring characteristic can again be set.
  • This variant is particularly suitable when a pneumatic suspension is desired, the space in the first tool 2h but not allow the installation of a relatively bulky pneumatic cylinder.
  • FIGS. 10a (Side view) and 10b (front view) is now a concrete embodiment of the invention shown.
  • the Figures 10a and 10b show a first tool 2i, which in turn consists of a first part 2i 1 and a spring-mounted therein second part 2i 2 .
  • a compression spring 9 is arranged between the first part 2i 1 and second part 2i 2 .
  • the storage is accomplished by means of bolts 15, which are pushed through the first part 2i 1 and the second part 2i 2 .
  • the power transmission takes place during the bending process via the bolts 15.
  • the second part 2i 2 remains in the pressing position, while the first part 2i 1 is raised.
  • a decreasing holding force is exerted on the workpiece 8 until finally abut the bolt 15 at the upper end of the slots in the second part 2i 2 and take this upwards.
  • the distance of the first part 2i 1 to the workpiece 8 is also a measure of the holding force. An operator of the press can thus “visually see” the holding force. With a little practice, a certain holding power can be set specifically, if this is not already taken over by a control of the press.
  • FIGS. 11a (Front view) and 11b (side view) show now a final specific embodiment of the invention.
  • the second part 2j 2 of a first tool 2j is formed by a pin having a hemispherical tip and a thickening at the other end.
  • a compression spring 9 and then the second part 2j 2 is used in a hole 17 in the first part 2j 1 .
  • a nut 18 is used as a safeguard against falling out, which has at the lower end, for example, holes or a slot for tightening.
  • the second part 2j 2 is shown in the extended position.
  • Fig. 11b this is additionally shown in dashed lines in the retracted position.
  • the compression spring 9 was in Fig. 11b omitted for better representation sake.
  • the Figures 11a and 11b show that the second part 2j 2 does not necessarily have to have the same profile as the first part 2j 1 .
  • the second part 2j 2 is very easy to produce, but must be expected if necessary with impressions in the workpiece.
  • the relatively narrow tools 2i, 2j can each be arranged to the left and to the right of a longer bending tool according to the prior art, ie inserted into a guide in the upper pressing beam.
  • several such tools 2i and 2j can be provided, for example every 50 cm.
  • the above explanations for the upper tool also apply mutatis mutandis to the lower tool, i. the holding device can also be arranged below, although the better accessibility to the workpiece because of the arrangement shown should be given preference. It would also be possible to provide holding devices at the top and bottom, so that the workpiece would, as it were, "float" between the two tools.
  • the invention relates to a bending press, even if the term press is used in the text.
  • the pressing or testing process can take place both manually and automatically. For example, the bending angle of a workpiece with the help of a video camera and a corresponding image processing can be evaluated automatically.
  • the invention of course relates not only to presses with the illustrated C-shaped frame, but also to presses with, for example, O-shaped frame.
  • the invention is independent of the nature of the drive of the press and therefore relates equally to eccentric presses, toggle presses, crank presses, screw presses, hydraulic presses, etc.

Landscapes

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

Claims (9)

  1. Presse plieuse (1) comprenant un premier outil (2a ... 2j) et un deuxième outil (3), qui peuvent être déplacés d'une position de repos vers une position de pressage l'un contre l'autre, afin d'appliquer, dans la position de pressage, une force de pressage sur une pièce (8) disposée entre le premier outil (2a ... 2j) et le deuxième outil (3), au moins le premier outil (2a... 2j) étant constitué d'au moins une première partie (2a1 ... 2j1, 2a3, 2b3) et d'une deuxième partie (2a2 ... 2j2, 2c3),
    caractérisée en ce que
    la deuxième partie (2a2 ... 2j2, 2c3) étant mobile par rapport à la première partie (2a1 ... 2j1, 2a3, 2b3) de façon à ce que la deuxième partie (2a2 ... 2j2, 2c3) reste en position de pressage, afin d'y exercer une force de maintien, réduite par rapport à la force de pressage, sur l'a pièce (8), lorsque la première partie (2a1 ... 2j1, 2a3, 2b3) se trouve a) dans la position de repos ou b) dans une position intermédiaire prévue entre la position de repos et la position de pressage.
  2. Presse plieuse (1) selon la revendication 1, caractérisée en ce que la deuxième partie (2b2) est mobile indépendamment de la première partie (2b1, 2b3).
  3. Presse plieuse (1) selon la revendication 1, caractérisée en ce que la deuxième partie (2c2, 2c3, 2i2, 2j2) est logée sur la première partie (2c1, 2i1, 2j1).
  4. Presse plieuse (1) selon l'une des revendications 1 à 3, caractérisée en ce que la deuxième partie (2b2 ... 2j2, 2c3) est logée de manière suspendue.
  5. Presse plieuse (1) selon la revendication 4, caractérisée en ce que, pour la suspension, un ressort hélicoïdal (9, 11), une rondelle ressort (10), un ressort à lame (12), une suspension pneumatique ou une suspension hydropneumatique est prévu.
  6. Presse plieuse (1) selon l'une des revendications 1 à 5, caractérisée en ce que la force de maintien de la deuxième partie (2b2) est contrôlée de façon à ce que celle-ci diminue lors que la distance entre la première partie (2b1, 2b3) et la deuxième partie (2b2) augmente.
  7. Presse plieuse (1) selon l'une des revendications 1 à 6, caractérisée en ce que la première partie (2a1 ... 2j1, 2a3, 2b3) et la deuxième partie (2a2 ... 2j2, 2c3) présentent le même profil.
  8. Presse plieuse (1) selon l'une des revendications 1 à 6, caractérisée en ce que la première partie (2j1) et la deuxième partie (2j2) présentent des profils différents.
  9. Outil (2a ... 2j) pour une presse plieuse (1), comprenant au moins une première partie (2a1 ... 2j1, 2a3, 2b3) et une deuxième partie (2a2 ... 2j2, 2c3)
    caractérisée en ce que
    la deuxième partie (2a2 ... 2j2, 2c3) est logée de manière suspendue dans la première partie (2a1 ... 2j1, 2a3, 2b3) et de manière mobile dans une direction de déplacement prévue pour un processus de pliage.
EP10189485.5A 2009-10-30 2010-10-29 Presse à cintrer et outil de cintrage doté d'un dispositif de retenue pour une pièce usinée Active EP2329895B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT17132009A AT509004B1 (de) 2009-10-30 2009-10-30 Presse und werkzeug mit haltevorrichtung für ein werkstück

Publications (3)

Publication Number Publication Date
EP2329895A2 EP2329895A2 (fr) 2011-06-08
EP2329895A3 EP2329895A3 (fr) 2014-05-14
EP2329895B1 true EP2329895B1 (fr) 2016-05-25

Family

ID=43770419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10189485.5A Active EP2329895B1 (fr) 2009-10-30 2010-10-29 Presse à cintrer et outil de cintrage doté d'un dispositif de retenue pour une pièce usinée

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Country Link
EP (1) EP2329895B1 (fr)
AT (1) AT509004B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108582736B (zh) * 2018-04-25 2023-08-22 嘉兴依诗曼内衣科技有限公司 一种用于胸垫制作的冲床模具
DE102021117367A1 (de) * 2021-07-06 2023-01-12 Laukien GmbH & Co. Beteiligungen Kommanditgesellschaft Biegewerkzeug, Biegepresse, Biegeverfahren und Werkstück

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252315A (en) * 1962-03-30 1966-05-24 Lyon Inc Apparatus for manufacturing wheel covers
DE3245755A1 (de) * 1982-12-10 1984-06-14 Dorstener Maschinenfabrik Ag, 4270 Dorsten Verfahren zum korrigieren der biegelinie des biegewerkzeuges einer biegepresse, insbesondere abkantpresse
JPH0761506B2 (ja) * 1986-09-25 1995-07-05 本田技研工業株式会社 薄板状ワ−クの絞り成形方法および装置
US5187966A (en) * 1989-12-11 1993-02-23 Sollac Method and device for drawing containers of frustoconical shape and a container drawn thereby
JPH06190469A (ja) * 1992-12-25 1994-07-12 Hitachi Ltd 打抜き加工金型
DE19806079A1 (de) * 1998-02-14 1999-08-19 Schuler Pressen Gmbh & Co Ziehpresse mit variabler Ziehrichtung
DE19928422A1 (de) * 1999-06-23 2000-12-28 Mueller Weingarten Maschf Presse zum Außenhochdruckformen
JP4582621B2 (ja) * 2003-06-23 2010-11-17 株式会社アマダ 曲げ加工装置
US7614270B2 (en) * 2008-02-14 2009-11-10 Ford Global Technologies, Llc Method and apparatus for superplastic forming

Also Published As

Publication number Publication date
EP2329895A3 (fr) 2014-05-14
EP2329895A2 (fr) 2011-06-08
AT509004A1 (de) 2011-05-15
AT509004B1 (de) 2011-07-15

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