EP2756891B1 - Dispositif de pliage de pièces usinées en forme de tige - Google Patents

Dispositif de pliage de pièces usinées en forme de tige Download PDF

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Publication number
EP2756891B1
EP2756891B1 EP13194876.2A EP13194876A EP2756891B1 EP 2756891 B1 EP2756891 B1 EP 2756891B1 EP 13194876 A EP13194876 A EP 13194876A EP 2756891 B1 EP2756891 B1 EP 2756891B1
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EP
European Patent Office
Prior art keywords
bending
bending head
pivot arm
intermediate plate
eccentric
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Application number
EP13194876.2A
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German (de)
English (en)
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EP2756891A1 (fr
Inventor
Peter Hammerer
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.)
Wafios AG
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Wafios AG
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Publication date
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Publication of EP2756891A1 publication Critical patent/EP2756891A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member

Definitions

  • the invention relates to a device for bending strand-like workpieces, such as wire, tubes, rods or the like., With a machine frame, a workpiece feed and attached to a pivoting arm, with respect to this movable bending head, wherein the pivot arm relative to the machine frame and the bending head opposite the swivel arm can be pivoted controlled in each case by at least one axis of rotation running parallel to the direction of the workpiece feed.
  • a device of this kind is from the EP 1 350 577 A1 and the EP 1 350 578 A1 known.
  • the bending plane does not remain constant, because the bending head must be pivoted about the two axes of rotation so that the fixed height and position of the workpiece can be approached. This has the consequence that the bending plane can not always be kept constant, z. B. aligned horizontally, which is desirable for large bending parts or unstable workpieces.
  • the workpiece can be supported by a support table to prevent unwanted deformation of the workpiece due to its own weight and partially faster bending and thus achieve greater unit performance, which is for example in the production of meanders of interest is.
  • the loading height relatively large and thus operating the machine is very unfavorable.
  • the invention is intended to remedy this situation and provide a device of the type mentioned above, in which it is possible to work with a constant bending plane, wherein different bending levels can be engaged with the workpiece without the bending plane having to be changed.
  • the loading height should be kept very low.
  • the axis of rotation of the pivot arm is formed as an eccentric cam eccentric shaft or pin on a rotatable pivot arm, wherein the eccentric shaft or the rotatable arm about a parallel to the feed direction of the workpieces center axis on the machine frame are rotatably mounted.
  • the height of the bending tools can be set almost arbitrarily. This makes it possible to bring different bending levels with the workpiece in engagement, without causing a change in the bending plane occurs. At the same time, the loading height can be kept very low.
  • the given in the inventive device three degrees of freedom (namely, eccentric shaft, swivel arm and rotation of the bending head) allow an extremely large freedom in the positioning of the bending head.
  • the device according to the invention can be provided with support tables and it can be constructed more bending levels, at the same time realized a low loading height and the distance between the bending device and an associated workpiece magazine can be maximized.
  • the bending plane can be rotated so that optimal conditions prevail and z. B. collisions between the workpiece and machine can be prevented. Large bent parts can be safely supported and bent and the workpieces can slide down on a table after completion.
  • each bending tool unit comprises at least one bending mold and a clamping jaws associated therewith, which the use of different bending tool units for bending without the requirement of replacing a bending tool unit used permits.
  • the rotary arm and the bending head are each associated with a rotary drive, these rotary drives preferably within the pivot arm (or its cover) are added.
  • the pivot arm is designed in the form of an intermediate plate, with two eccentric, to each this is in each case pivotally engaged, wherein on the side facing the bending head side of the intermediate plate along this laterally movable carriage is mounted on which the bending head is rotatably mounted, each eccentric pin is supported by a pivot arm or an eccentric shaft, the or on Machine frame is mounted rotatably about an axis parallel to the feed direction of the workpieces, further on each of the bending head facing away from the intermediate plate one of the eccentric pin in an attached to the intermediate plate slot, in this slidably in the feed direction of the carriage engages while the other eccentric pin in a form-fitting manner an associated circular receptacle rotatably protrudes in the intermediate plate.
  • the engagement of an eccentric pin in the slot of the intermediate plate forms a rotary bearing with eccentric drive with a degree of freedom in the longitudinal direction of the carriage, which could well be realized in other ways than by engagement in a longitudinal hole in the intermediate plate (eg two guide rails on the intermediate plate, between which the corresponding eccentric pin slidably engages).
  • the intermediate plate is thus connected to the one eccentric pin, pivotable about this, while the other eccentric pin in the slot of the intermediate plate, rotatable to this, is guided, whereby the intermediate plate can be adjusted both in height and in its orientation to the horizontal , On the intermediate plate then sits, along her movable, a carriage on which the bending head is rotatably mounted.
  • a rotary drive is associated with the bending head, which is mounted on the carriage, which contributes to a space-saving design.
  • each axis of rotation is assigned a separate drive in the device according to the invention, wherein advantageously all drives are program-controlled.
  • the inventive device allows automation with level changes even with large bending heads and a left-right change at low loading height and allows a very precise positioning of a left / right bending head.
  • bending machine 1 for elongated workpieces 2, such. B. pipes, wire o. ⁇ ., Has a machine frame 3, at the top in its longitudinal direction parallel to each other two linear guides 23 are mounted on which a feed slide 4 in the longitudinal direction of the machine frame 3 is movable.
  • the feed carriage 4 carries at its front end a rotatable collet 5, which holds the workpiece 2 and by means of which it can also be rotated.
  • a pivot arm 6 which is pivotally mounted on an eccentric pin 11 (see. Fig. 2 ) of an eccentric shaft 8 and can be pivoted relative to the latter about the central axis 12 of the eccentric pin 11 as a rotation axis.
  • the eccentric shaft 8 in turn is about a central axis of rotation 9, parallel to the feed direction x (see. Fig. 1 ) of the workpiece 2 is rotatable on the machine frame. 3 mounted, wherein the eccentric shaft 8 is associated with a not shown in the figures rotary drive.
  • a bending head 7 is rotatably mounted about an axis of rotation 10, to which in turn a separate (not shown in the figures) rotary drive is assigned, which in turn is housed within the pivot arm 6.
  • a (not shown in the figures also) pivot drive is arranged on the pivot arm 6, by means of which the pivot arm 6 can be pivoted about the eccentric pin 11 relative to the eccentric shaft 8.
  • the pivotable about the rotary shaft 10 bending head 7 has two mutually opposite in the direction of rotation by 180 ° bending tool units 13, each of which comprises a bending mold 14 and a relative thereto or away from her adjustable clamping jaws 15.
  • FIG. 2 showing a front view of the bending machine 1 Fig. 1 shows that the bending mold 14 and the clamping jaws 15 of each bending tool unit 13 each comprise two superimposed bending molds, each of which determines its own bending level together with its associated portion of the clamping jaw 15.
  • the Fig. 3 to 8 now show basic front views of the bending machine from the Fig. 1 and 2 in different stages, as they can be approached during the working cycle of such a bending machine or need.
  • a pickup position is shown, in which a workpiece 2 is removed from the bending head 7 from a (not further shown) workpiece magazine.
  • the eccentric shaft 8 is rotated so that the eccentric pin 11 is placed as far as possible in the direction of the workpiece 2, wherein at the same time the pivot arm 6 is pivoted in the direction of the workpiece 2 and the bending head 7 is rotated so that the workpiece 2 between the Clamping jaw 15 and the bending mold 14 threaded and can be clamped by these.
  • the bending plane B corresponds to the so-called "first" bending level defined by the lower rotational shape of the bending mold 14 of the longitudinal axis of the workpiece 2.
  • Fig. 5 Now the position for bending with the second bending level is shown, which is determined by the upper rotational shape of the bending mold 14 and the associated upper mold recess 15 of the clamping jaw.
  • the eccentric shaft 8 was, compared to the position Fig. 4 Turned somewhat counterclockwise, the pivot arm 6 is slightly rotated in a clockwise direction and the bending head 7 in the counterclockwise direction.
  • the presentation of the Fig. 6 now shows a position in which the workpiece 2 is threaded out of the bending tool. For this purpose, by a corresponding movement of the three pivot axes 9, 10 and 12 of the bending head 7 obliquely downward from the workpiece 2.
  • Fig. 7 a side change is shown in which the bending head 7 is placed transversely (the bending axis A is horizontal), the eccentric pin 11 is lowered to the maximum and then the pivot arm 6 is rotated clockwise.
  • FIGS. 9 and 10 is shown another embodiment of a device according to the invention, wherein Fig. 9 shows in a perspective schematic representation of the front end of the machine frame 3 of a bending machine to which a bending head 7 is attached via an intermediate pivot arm in the form of an intermediate plate 16, and Fig. 10 shows a view of the device Fig. 9 from the front.
  • a pivot arm in the form of an intermediate plate 16 is attached to the machine frame 3 side facing away from a slide 19 in the longitudinal direction of the intermediate plate 16 is arranged.
  • the carriage 19 carries the bending head 7, which is rotatably arranged on the carriage 19 via a holder 25.
  • the two axes of rotation 23, 24 are arranged at the front end of the machine frame 3 at the same height, but laterally offset relative to each other so that the two pivot arms 21, 22 within the pivoting ranges, which they each cover in a work cycle of the bending machine, can not collide with each other.
  • the eccentric pin 17 of the one (in Fig. 10 in the front view right mounted) pivot arm 21 protrudes from the machine frame 3 facing the back of the intermediate plate 16 in an elongated hole 20 formed in this, in such a way that it both rotatable in the slot 20, as well as in the longitudinal direction, namely in the travel direction y of the carriage 19, is movably received.
  • This arrangement thus forms a rotary bearing with eccentric drive and a degree of freedom in the direction of travel of the carriage y .
  • eccentric pin 18 is rotatably mounted in the intermediate plate 16 by 18 protrudes on the back in a dimension of the eccentric pin corresponding circular recess in which it is received rotatably.
  • Each of the two pivot arms 21, 22 is driven via a rotary drive (not shown in the figures), which is provided on or within the machine frame 3.
  • the intermediate plate 16 can be changed or moved both in height, as well as in their orientation to the horizontal, wherein the bending head 7 at the same time on the carriage 19 in turn along the intermediate plate 16 is movable.
  • the bending head 7 sits on the holder 25 (see, in particular Fig. 9 ), on which he is attached to the carriage 19 and within which also a (in the FIGS. 9 and 10 not shown) pivot drive for the bending head 7 sits.
  • FIGS. 9 and 10 can be set for the bending tools almost any altitude or the bending plane B can remain unchanged at a duty cycle and thus also the use z. B. a support table for the workpiece possible.
  • a mechanical, positive engagement takes place from the machine frame 3 on the front plate, which has the advantage that the elasticity of the guides is intercepted during bending with a large load by this positive locking, whereby the repeatability and fatigue strength of the bending machine can be improved.

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

Claims (9)

  1. Dispositif de pliage de pièces filiformes(2) comme du fil, des tubes, des tiges ou autres, avec un châssis de machine (3), un dispositif d'avance de pièce (4) et une tête de pliage (7) fixée sur un bras pivotant (6 ; 16) et mobile par rapport à celui-ci, le bras pivotant (6 ; 16) étant pivotant de manière contrôlée par rapport au châssis de machine (3) et la tête de pliage (7) étant pivotante de manière contrôlée par rapport au bras pivotant (6 ; 16) au moins autour d'un axe de rotation (10, 12, 23, 24) parallèle à la direction (x) du dispositif d'avance de pièce, caractérisé en ce que l'axe de rotation (12) du bras pivotant (6) est conçu comme un tourillon excentrique (11) d'un arbre excentrique (8) ou comme un tourillon sur un bras pivotant rotatif, qui est monté de manière rotative sur le châssis de machine (3) autour d'un axe central (9) parallèle à la direction d'avance (x) des pièces (2).
  2. Dispositif selon la revendication 1, caractérisé en ce que la tête de pliage (7) comporte deux unités d'outils de pliage (13) disposées de manière décalées entre elles de 180° par rapport à l'axe de rotation (10) de la tête de pliage (7).
  3. Dispositif selon la revendication 2, caractérisé en ce que chaque unité d'outil de pliage (13) comprend au moins une forme de pliage (14) et une mâchoire de serrage (15) correspondant à celle-ci.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le bras pivotant (6) ainsi que la tête de pliage (7) sont munis d'un entraînement rotatif.
  5. Dispositif selon la revendication 4, caractérisé en ce que les entraînements rotatifs du bras pivotant (6) et de la tête de pliage (7) sont logés à l'intérieur du bras pivotant (6).
  6. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le bras pivotant est conçu sous la forme d'une plaque intermédiaire (16), qui s'emboîte avec deux tourillons excentriques (17, 18), de manière pivotante autour de ceux-ci, un chariot (19) mobile latéralement étant monté sur le côté de la plaque intermédiaire (16) orienté vers la tête de pliage (7), sur lequel la tête de pliage (7) est fixée de manière rotative, chaque tourillon excentrique (17, 18) étant porté par un bras pivotant (21, 22) ou un arbre excentrique, qui est monté sur le châssis de machine (3) de manière rotative autour d'un axe (23, 24) parallèle à une direction d'avance (x) des pièces (2), en outre, sur le côté de la plaque intermédiaire (16) opposé à la tête de pliage (7), un des tourillons excentriques (17) s'emboîtant dans un trou oblong (20) réalisé sur la plaque intermédiaire (16), de manière mobile dans celui-ci dans la direction de déplacement (y) du chariot (19), tandis que l'autre tourillon excentrique (18) dépasse de manière rotative, avec une complémentarité de forme, dans un logement circulaire correspondant dans la plaque intermédiaire (16).
  7. Dispositif selon la revendication 6, caractérisé en ce que la tête de pliage (7) est munie d'un entraînement rotatif monté sur le chariot (19).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que chaque axe de rotation (9, 10, 12, 23, 24) est muni de son propre entraînement.
  9. Dispositif selon la revendication 8, caractérisé en ce que tous les entraînements sont contrôlés par un programme.
EP13194876.2A 2013-01-21 2013-11-28 Dispositif de pliage de pièces usinées en forme de tige Active EP2756891B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310200850 DE102013200850B4 (de) 2013-01-21 2013-01-21 Vorrichtung zum Biegen strangförmiger Werkstücke

Publications (2)

Publication Number Publication Date
EP2756891A1 EP2756891A1 (fr) 2014-07-23
EP2756891B1 true EP2756891B1 (fr) 2015-08-19

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EP13194876.2A Active EP2756891B1 (fr) 2013-01-21 2013-11-28 Dispositif de pliage de pièces usinées en forme de tige

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EP (1) EP2756891B1 (fr)
DE (1) DE102013200850B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018128903A1 (de) 2018-11-16 2020-05-20 Wafios Aktiengesellschaft Vorrichtung zum Biegen stabförmiger Werkstücke

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20161931A1 (it) * 2016-03-23 2017-09-23 Crippa Spa Dispositivo per la curvatura di un materiale filiforme
DE102016116159B4 (de) 2016-08-30 2018-08-09 Dengler Tubetec Gmbh Verfahren und Vorrichtung zum Biegen von strangförmigen Werkstücken
IT201600119591A1 (it) * 2016-11-25 2018-05-25 Crippa Spa Macchina per curvare materiale filiforme quale un tubo con un sistema di caricamento contemporaneo del tubo da curvare e scarico del tubo curvato
CN106738816A (zh) * 2016-12-09 2017-05-31 重庆有为塑胶有限公司 管件弯曲装置
DE102017117979A1 (de) 2017-08-08 2019-02-14 Wafios Aktiengesellschaft Biegemaschine zum Biegen von stab- oder rohrförmigen Werkstücken

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1290140B1 (it) * 1997-03-21 1998-10-19 Blm Spa Macchina per curvare tubi e materiali filiforme in genere
JP4319314B2 (ja) * 2000-01-31 2009-08-26 株式会社オプトン 曲げ加工装置
ES2194827T3 (es) * 2001-10-02 2003-12-01 Macchine Curvatubi Crippa Agos Maquina para curvar con traccion.
EP1350578B1 (fr) 2002-04-03 2007-04-25 Trumpf Werkzeugmaschinen GmbH + Co. KG Machine de pliage des pièces en forme de barre et/ou tige, en particulier des tubes
EP1350577A1 (fr) 2002-04-03 2003-10-08 Trumpf Pulzer GmbH + Co. KG Machine de pliage des pièces en forme de barre ou tige, en particulier des tubes
DE50205694D1 (de) * 2002-10-02 2006-04-13 Trumpf Rohrtechnik Gmbh & Co K Biegemaschine mit drehbarer Werkzeugeinheit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018128903A1 (de) 2018-11-16 2020-05-20 Wafios Aktiengesellschaft Vorrichtung zum Biegen stabförmiger Werkstücke

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Publication number Publication date
EP2756891A1 (fr) 2014-07-23
DE102013200850A1 (de) 2014-07-24
DE102013200850B4 (de) 2015-01-22

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