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EP3880381B1 - Dispositif de cintrage de pièces en forme de barre - Google Patents

Dispositif de cintrage de pièces en forme de barre Download PDF

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Publication number
EP3880381B1
EP3880381B1 EP19794962.1A EP19794962A EP3880381B1 EP 3880381 B1 EP3880381 B1 EP 3880381B1 EP 19794962 A EP19794962 A EP 19794962A EP 3880381 B1 EP3880381 B1 EP 3880381B1
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EP
European Patent Office
Prior art keywords
bending
bending head
feed carriage
feed
workpiece
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
EP19794962.1A
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German (de)
English (en)
Other versions
EP3880381A1 (fr
Inventor
Uwe-Peter Weigmann
Peter Hammerer
Jörg Eisele
Christoph RÖHM
Jürgen Wolf
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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Filing date
Publication date
Application filed by Wafios AG filed Critical Wafios AG
Publication of EP3880381A1 publication Critical patent/EP3880381A1/fr
Application granted granted Critical
Publication of EP3880381B1 publication Critical patent/EP3880381B1/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
    • 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 rod-shaped workpieces, with a base frame, at one end of which is attached a bending head that can be rotated about an axis of rotation, with two bending tools attached to it on opposite sides for bending in different bending directions, and with one on the base frame feed carriage which can be moved along a feed direction relative to the bending head and which carries a pipe wrench and with which a workpiece held by the latter can be fed to the bending head for processing.
  • a feed carriage with a pipe wrench is used, which is slidably accommodated on a plate which, at its one end region facing away from the bending head, is articulated on the machine frame so that it can pivot about an axis perpendicular to its clamping plane.
  • the plate can be pivoted to both sides on the machine frame from a position in which a workpiece held by the pipe wrench is aligned for feeding it to the bending head, so that a machined workpiece can be set down and a new workpiece can be picked up from a magazine at the front next to the machine frame.
  • a bending head attached to a swivel arm and movable relative thereto is used, the swivel arm on the machine frame and the bending head on the latter each being pivotable in a controlled manner about an axis of rotation parallel to the direction of workpiece feed.
  • the bending plane is not constant during operation, since the bending head has to be pivoted about the two axes of rotation in such a way that the fixed height and position of the workpiece can be approached.
  • the bending plane cannot always be kept constant, for example aligned horizontally, which is desirable for large bent parts or also for unstable workpieces.
  • a bending device of the type mentioned in the EP 2 756 891 B1 described, with which the workpieces to be bent can be bent both to the left and to the right.
  • the bending head is attached to a swivel arm, which can be swiveled to the machine frame.
  • the axis of rotation of the swivel arm is designed as an eccentric pin of an eccentric shaft or as a pin on a rotatable swivel lever, the eccentric shaft or the rotatable swivel lever being rotatably mounted on the machine frame about a central axis running parallel to the feed direction of the workpiece. In this way, different levels of bending can be engaged with the workpiece to be machined without the bending plane changing.
  • the invention is based on the object of developing such a bending device in such a way that it works with little structural effort and less complex structure as well as better accessibility with smaller moving masses.
  • it should be able to remove the workpieces from a magazine that no longer has to be at the side in front of the machine and thus does not restrict the bending space in front of the machine.
  • a device of the type mentioned at the outset is designed for this purpose in such a way that on the feed carriage, on its front side facing the bending head, there is articulated a pivoting lever at its end region which can be rotated about an axis of rotation parallel to the feed direction of the feed carriage, the other end region of which carries the pipe wrench and which has at least one pivoting position as a Having working position for feeding the workpiece held by the pipe wrench to the bending head.
  • the pipe wrench can now be pivoted out of the working position by rotating it in this vertical plane with the pivoting lever on the feed carriage, which can be pivoted in a vertical plane, to pick up a new workpiece, and a new workpiece can be gripped in another suitable pivoted position and then returned to it be pivoted back into the working position, for which purpose the feed carriage with the pipe wrench is first moved back to a starting position on the machine frame counter to the feed direction in order to pick up the new workpiece and only then is the pivoted lever pivoted out.
  • the swiveled-out swivel lever is preferably brought into an additional swivel position in addition to its working position, in which it protrudes laterally beyond the base frame and runs inclined downwards from the feed carriage, so that it is there laterally on the base frame and downwards from a side next to it, but behind the bending head arranged magazine, thus outside the area of the bending head, which can accommodate the new workpiece.
  • This process requires only relatively little non-productive time for changing parts and no additional hardware for handling.
  • the return of the feed carriage to its starting position and the pivoting of the pivoting lever into the additional pivoting position can also be carried out considerably more quickly than when the entire machine bed is pivoted out, as is the case with the generic device.
  • a particularly preferred embodiment of the invention is that the pivoting lever has not just one but two (or more) pivoting positions as working positions in which the workpiece held by the pipe wrench can be fed to the bending tool of the bending head on two (or more) different bending planes is.
  • the possibility of being able to carry out the height adjustment for the individual bending planes using the pivoting lever is significantly more advantageous than the assignment of different height adjustments for the bending planes using complicated kinematics of the bending head and a pivoting lever assigned to it.
  • the movement of the feed carriage towards the bending tool and in the opposite direction can be implemented in any suitable manner, although it is particularly preferred if the feed carriage can be moved in the feed direction by means of a rack and pinion drive.
  • a gear wheel for the rack and pinion drive is preferably attached to the underside of the base plate of the feed carriage, which can be driven via a drive motor which is located on the top side of the base plate.
  • a preferred embodiment of the bending device according to the invention also consists in that the rotatable bending head is articulated directly on the base frame.
  • the base frame is provided at its end facing the bending head with an upstanding transverse wall on its upper side, to which the bending head is rotatably fastened, the motor for rotating the bending head in the form of a servo motor with a gear protruding through an opening in the transverse wall in the direction away from the bending head.
  • the feed carriage has, on its front side facing the bending head, a front wall transverse to the feed direction, which projects upwards from a base plate of the feed carriage that can be moved along the guide track and on the front side of which the swivel lever is held.
  • a motor for pivoting the pivoting lever is preferably attached to the rear of the front wall facing away from the pivoting lever, which in turn allows very good accessibility for maintenance purposes and a very space-saving arrangement.
  • a servo motor with gearing is provided on the rear side of the pivoting lever facing away from the pipe wrench for rotating the pipe wrench, which in turn ensures a simple structure and good maintenance accessibility.
  • a further advantageous embodiment of the invention is that the pivoting lever is provided with a shaped projection on its rear side facing away from the bending head, which slidably engages in a receiving groove with a complementary cross-section in the front wall of the feed carriage, at least in all working positions of the pivoting lever.
  • the feed forces can be transmitted to the pivoting lever (and thus also to the workpiece to be machined via the pipe wrench attached to it) by positive locking, even in different pivoting positions of the pivoting lever than working positions, which also allows relatively large feed forces to be used.
  • the bending device according to the invention requires remarkably little effort and is therefore also inexpensive to manufacture. As a result of the low structural complexity and the arrangement used according to the invention, it can work in such a way that parts feeding and removal of the machined parts can run parallel to one another, thus saving non-productive times and increasing machine output.
  • the workpieces can be fed in close to the machine frame and behind the bending head, which requires little installation space so that the bending space in front of the machine does not have to be restricted.
  • the invention also makes it possible to arrange the pick-up position of a new workpiece (e.g. magazine position) in such a way that after it has been grasped by the pipe wrench on the swiveled-out pivoting lever when it is swiveled back into its working position, the front end area of the workpiece is directly from above between the bending mold and the opened one Clamping jaws of the bending head is swiveled in, so that it is also possible to dispense with the insertion of the detected workpiece by the feed carriage into the forming unit, which results in a further opportunity to save time.
  • a new workpiece e.g. magazine position
  • the invention can also be provided for tube bending machines with a mandrel unit (internal mandrel).
  • a mandrel unit internal mandrel
  • the arrangement must then be such that the mandrel unit follows the pivoting movement of the pivoting lever with the pipe wrench, which means, however, that z. B. the entire structure of the linear guides would have to be pivoted.
  • the mandrel carriage can also be equipped with a swivel lever with mandrel attachment, the basic structure of the mandrel carriage preferably corresponding to that of the feed unit. The mandrel would then swivel out synchronously with the pipe wrench and thus realize a mandrel bending machine which then also has the advantages of the invention mentioned above.
  • the figures show a device 1 for bending rod-shaped workpieces (e.g. pipes, rods or the like), which will only be briefly referred to as “bending machine” below.
  • rod-shaped workpieces e.g. pipes, rods or the like
  • This bending machine 1 has a base frame 2 as the machine frame, on the top of which a feed unit in the form of a feed carriage 3 is mounted on two parallel guides 4 along a guide path defined by them in a feed direction v (and also in the opposite direction).
  • a bending head 5 is attached to the front end of the base frame 2 and is attached directly to a transverse wall 6 of the base frame 2 running vertically upwards so that it can be rotated relative to the latter.
  • a servomotor 7 with gearing is provided on the side of the bending head 5 facing the feed carriage 3, which protrudes through an opening 8 in the transverse wall 6 and there projects somewhat in the direction of the feed carriage 3, as shown 1 shows in detail.
  • the bending head 5 can be rotated about an axis of rotation X relative to the base frame 2 by the motor 7 .
  • the bending head 5 is provided with two bending tools 9 and 10 provided on it on opposite sides for bending in two different bending directions.
  • the bending tools 9 and 10 include as forming units, such as in particular Figures 2 to 4 show, in each case a bending mold 11 or 12 and in each case a clamping jaw 13 which can be adjusted relative to this towards or away from it defines its own bending level with the section of the clamping jaw 13 or 14 assigned to it.
  • forming units such as in particular Figures 2 to 4 show, in each case a bending mold 11 or 12 and in each case a clamping jaw 13 which can be adjusted relative to this towards or away from it defines its own bending level with the section of the clamping jaw 13 or 14 assigned to it.
  • forming units such as in particular Figures 2 to 4 show, in each case a bending mold 11 or 12 and in each case a clamping jaw 13 which can be adjusted relative to this towards or away from it defines its own bending level with the section of the clamping jaw 13 or 14 assigned to it.
  • a plate 15 is also provided in each case for the attachment of a slide rail.
  • the feed carriage 3 is provided on its front side facing the bending head 5 with a front wall 16 which is directed transversely to the feed direction v and which is attached to a base plate at the front 17 of the feed carriage 3 protrudes vertically upwards and can be moved on the guides 4 to move the feed carriage 3 along the guideway.
  • an elongate pivoting lever 18 is attached so that it can pivot about an axis Y , which lies parallel to the guide track or the two guides 4. This can be rotated at one end around the pivot axis Y , with a pipe wrench 19 also arranged parallel to the alignment of the guides 4 for receiving a workpiece 25 to be machined being attached to its opposite, pivotable end region.
  • the workpiece 25 is clamped by the pipe wrench 19 and then, by moving the feed carriage 3 in exact alignment with the bending tool 9 located at the top of the bending head 5, is fed to the latter for forming.
  • a servomotor 20 with gearing is provided for pivoting the pivoting lever 18, by means of which the pivoting lever 18 can be pivoted about a Y axis.
  • the pipe wrench 19 is attached to the pivoting lever 18 via a pneumatic unit 21, a servomotor 22 with gearing being attached to the opposite rear side of the pivoting lever 18 for rotating the pipe wrench 19.
  • This servomotor 22 is attached to the pivoting lever 18 in a position in which it cannot collide with the end surface of the front wall 16 of the feed carriage 3 there, even when the pivoting lever 18 is pivoted, as is particularly evident from the illustrations in FIG 1 and 2 is evident.
  • the feed carriage 3 can be moved in the feed direction v (and in the opposite direction) by means of a rack and pinion drive.
  • a toothed rack 23 is attached along one guide rail 4, which is on the side of the guide track which, when the guide carriage 3 is placed on the guides 4, is on the side of its base plate 17 which is opposite the servomotor 20 for rotating the pivoting lever 18 on the underside of the base plate 17 meshes with a toothed wheel (not shown in the figures) which is driven by a servo motor 24 (with gears) which is arranged on the upper side of the base plate 17.
  • the meshing between this gear wheel and the toothed rack 23 is provided at a position which results in a drive of the feed carriage 3 close to the load application during operation, preferably directly in the line of action of the load application.
  • the pivoted lever 18 has at least one pivoted position as a working position for feeding the workpiece 25 held by the pipe wrench 19 to the bending head 5 .
  • the pivoted lever 18 can be pivoted into two pivoted positions as working positions, which allow the workpiece 25 to be machined to be fed to the associated bending tool 9 at two different bending levels, corresponding to the two bending molds arranged one above the other on the latter.
  • bending tools 9 and 10 and pivoting lever 18 are in the Figures 5A to 5E five basic front views of the bending machine 1 are shown, from which the respective assignments of the individual parts of this bending machine 1 to each other for different types of settings can be seen: So is in Figure 5A the state shown that the bending head 5 is rotated about its pivot axis X so that one of the two bending tools, namely bending tool 9, is on top.
  • the pivoted lever 18 is pivoted into a first working position in which the workpiece 25 supplied by the pipe wrench (not specifically shown in these figures) is fed to the lower of the two bending molds mounted one above the other on the bending tool 9 in a corresponding bending plane.
  • Figure 5C an arrangement is shown as it results when the bending head 5 is rotated about its pivot axis X in such a way that the other bending tool 10 is now lying on the upper side and its arrangement there is selected in such a way that to carry out the bending process in one to the the Figures 5A and 5B shown position opposite bending direction is made.
  • the workpiece 25 is now positioned on the other side of the bending tool 10 against one of the two bending molds lying one above the other and is (not shown in the figures) braced against the bending tool 10 from this side.
  • Figure 5E illustrates the case of relocating the bending head 5 to change the two bending tools 9 and 10, in which case the pivoting lever 18 is moved to a further, even higher pivoting position in such a way that the workpiece 25 is disengaged to enable the bending head 5 to be pivoted during its rotating process is raised with one of the tools 9 or 10.
  • a suitable overall control of the movement sequences ensures that all movements of the bending head 5 and the pivoting lever 18 are correctly coordinated with one another in order to always ensure that the correct operating position is reached depending on the desired bending direction and desired bending level.
  • Figure 5A a left bend at a first bend level
  • Figure 5B a left bend on a second bend level
  • Figure 5C a right turn at the first bend level
  • Figure 5D a right bend at the second bend level.
  • FIG. 1 now shows a perspective view of the bending machine 1 from behind, with the feed carriage 3 on the guideway already being advanced so far in the direction of the bending head 5 that the workpiece 25 gripped by the pipe wrench 19 is already being processed on the bending tool 9 by its bending molds 11.
  • FIG. 2 represents a perspective view of the in 1 illustrated bending machine 1 from the front, with the same position of the feed carriage 3 as in 1 is already shown.
  • FIG 3 shows once again the perspective view of the bending machine 1 from the front, as in FIG 2 , but here in a completely retracted position of the feed carriage 3 from the bending head 5, in which case the pivoting lever 18 moves out of the working position, which it is in 2 has taken, is pivoted towards the outside of the base frame 2 in such a way that it is in this additional pivoted position of the front wall 16 of the feed carriage 3 and thus also from this side of the base frame 2 is inclined downwards, as shown in 3 shown what is referred to.
  • FIG. 4 shows the bending machine again in the position as in 3 , where in 4 in addition, a workpiece magazine 26 set up next to the bending machine 1 is shown, with the illustration of the 4
  • the lowermost workpiece 25 has just been brought out of a workpiece supply arranged on an upper sloping feed plane 27 into a receiving position which has been offset downwards and has been gripped and clamped there by the collet chuck 19 .
  • the workpiece 25 is transferred into a position aligned with the bending mold 11 of the bending tool 9 and then fed to this forming unit by the feed carriage 3, so that in principle the 1 and 2 shown state is reached with the feed carriage 3 already moved there by a certain feed distance to the bending head 5.
  • a shaped groove 29 into which a correspondingly designed shaped projection on the rear side of the pivoted lever 18 can engage when the pivoted lever 18 is pivoted and can be displaced in it until pivoting into all working positions of the pivoted lever 18 .
  • This shaped projection has a cross-sectional shape complementary to the cross-sectional shape of the shaped groove 29, so that in all working positions of the pivoted lever 18 during operation, transmission of the feed forces to the pivoted lever 18 and thus to the pipe wrench 19 and the workpiece 25 to be introduced into the forming unit of the bending head 5 is ensured . Only in the in the 3 and 4 In the illustrated unfolded end position of the pivoting lever 18 for receiving a new workpiece 25, the shaped projection is disengaged from the shaped groove 29.
  • the bending machine 1 shown has a comparatively simple structure, is embodied in a stable manner in the area of its essential elements and is easily accessible, and is therefore maintenance-friendly, and it also permits simpler cable routing.
  • a new workpiece 25 can also be picked up quickly and easily from a workpiece magazine 26 arranged on the side, which also enables automatic parts feed using the existing axes, with the additional advantage being achieved that the workpiece feed and the removal of the machined workpieces 25 can run parallel to each other, so that non-productive times can be saved and the machine output is also increased.
  • the workpiece magazine 26 can be close to the base frame 2 and behind the bending head 5, which means that a particularly small installation area is made possible and, in addition, the bending space in front of the bending machine is not restricted.
  • the fixed connection of the bending head 5 to the base body 2 of the bending machine 1 leads to a particularly stable, more accessible and easy-to-maintain arrangement and also allows the use of large drive powers.

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

Claims (11)

  1. Dispositif (1) pour le cintrage de pièces en forme de barre (25), comprenant un châssis de base (2), à une extrémité duquel est disposée une tête de cintrage (5) à rotation autour d'un axe de rotation (X), comportant deux outils de cintrage (9, 10) disposés sur celle-ci sur des côtés opposés l'un à l'autre, pour le cintrage dans différentes directions de cintrage, et comprenant un chariot d'avance (3) déplaçable sur le châssis de base (2) le long d'une direction d'avance (v) par rapport à la tête de cintrage (5), qui porte une pince tubulaire (19) et avec lequel une pièce (25) maintenue par celle-ci peut être amenée à la tête de cintrage (5) pour l'usinage, caractérisé en ce qu'un levier de pivotement (18) à rotation au niveau de l'une de ses zones d'extrémité autour d'un axe de rotation (Y) parallèle à la direction d'avance (v) du chariot d'avance (3) est articulé sur le chariot d'avance (3) sur son côté avant tourné vers la tête de cintrage (5), à l'autre zone d'extrémité duquel est disposée la pince tubulaire (19), et qui présente au moins une position de pivotement en tant que position de travail pour l'amenée de la pièce (25) maintenue par la pince tubulaire (19) à la tête de cintrage (5).
  2. Dispositif selon la revendication 1, caractérisé en ce que le levier de pivotement (18) présente deux positions de pivotement en tant que positions de travail, dans lesquelles la pièce (25) maintenue par la pince tubulaire (19) peut être amenée à l'outil de cintrage (9 ; 10) de la tête de cintrage (5) sur deux plans de cintrage différents l'un de l'autre.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le levier de pivotement (18) peut être mis, en plus de ses positions de travail, dans une position de pivotement supplémentaire dans laquelle il dépasse latéralement du châssis de base (2) et s'étend de manière inclinée vers le bas depuis le chariot d'avance (3).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le chariot d'avance (3) est déplaçable dans la direction d'avance (v) au moyen d'un entraînement à crémaillère.
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la tête de cintrage à rotation (5) est articulée sur le châssis de base (2).
  6. Dispositif selon la revendication 5, caractérisé en ce que le châssis de base (2) présente, à son extrémité tournée vers la tête de cintrage (5), sur son côté supérieur, une paroi transversale (6) se dressant, sur laquelle la tête de cintrage (5) est fixée de manière rotative, le moteur (7) destiné à la rotation de la tête de cintrage (5), sous la forme d'un servomoteur (7) avec transmission, faisant saillie à travers une ouverture (8) dans la paroi transversale (6) dans la direction opposée à la tête de cintrage (5).
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le chariot d'avance (3) présente sur son côté avant, transversalement à la direction d'avance (v), une paroi avant (16) qui fait saillie vers le haut à partir d'une plaque de base (17) du chariot d'avance (3) déplaçable le long de la voie d'acheminement, et sur le côté avant de laquelle est maintenu le levier de pivotement (18).
  8. Dispositif selon la revendication 7, caractérisé en ce qu'un moteur (20) pour le pivotement du levier de pivotement (18) est disposé sur le côté arrière de la paroi avant (16), détourné du levier de pivotement (18).
  9. Dispositif selon la revendication 4, en connexion avec la revendication 7 ou la revendication 8, caractérisé en ce qu'une roue dentée pour l'entraînement à crémaillère est disposée sur le côté inférieur de la plaque de base (17) du chariot d'avance (3), qui peut être entraînée par le biais d'un moteur d'entraînement (24) sur le côté supérieur de la plaque de base (17).
  10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce que, pour la rotation de la pince tubulaire (19), un servomoteur (22) avec transmission est prévu sur le côté arrière du levier de pivotement (18) détourné de la pince tubulaire (19).
  11. Dispositif selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le levier de pivotement (18) est pourvu, sur son côté arrière détourné de la tête de cintrage (5), d'une protubérance profilée qui s'engage de manière coulissante dans une rainure de réception (29) de section transversale complémentaire dans la paroi avant (16) du chariot d'avance (3), au moins dans toutes les positions de travail du levier de pivotement (18).
EP19794962.1A 2018-11-16 2019-10-23 Dispositif de cintrage de pièces en forme de barre Active EP3880381B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018128903.0A DE102018128903A1 (de) 2018-11-16 2018-11-16 Vorrichtung zum Biegen stabförmiger Werkstücke
PCT/EP2019/078935 WO2020099085A1 (fr) 2018-11-16 2019-10-23 Dispositif de cintrage de pièces en forme de barre

Publications (2)

Publication Number Publication Date
EP3880381A1 EP3880381A1 (fr) 2021-09-22
EP3880381B1 true EP3880381B1 (fr) 2022-07-06

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EP19794962.1A Active EP3880381B1 (fr) 2018-11-16 2019-10-23 Dispositif de cintrage de pièces en forme de barre

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EP (1) EP3880381B1 (fr)
DE (1) DE102018128903A1 (fr)
WO (1) WO2020099085A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112958661A (zh) * 2021-02-23 2021-06-15 广州聚物汇科技有限公司 一种智能管材折弯设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485658A (en) * 1983-05-31 1984-12-04 Stewart A K Carriage assembly for a tube bending machine
WO1991004113A1 (fr) * 1989-09-20 1991-04-04 Evg Entwicklungs- U. Verwertungs-Gesellschaft M.B.H. Dispositif de pliage de barres en acier afin de façonner des elements d'armatures en beton
IT1290141B1 (it) 1997-03-21 1998-10-19 Blm Spa Macchina per curvare materiale filiforme come tubi barre o profilati
DE50100461D1 (de) * 2001-01-30 2003-09-11 Blm Spa Maschine zum Biegen von strangförmigem Material, wie Rohren, Stangen, Profilen oder Metalldraht
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
ITMI20071355A1 (it) * 2007-07-09 2009-01-10 Crippa Spa Macchina curvatubi
DE102013200850B4 (de) 2013-01-21 2015-01-22 Wafios Aktiengesellschaft Vorrichtung zum Biegen strangförmiger Werkstücke

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Publication number Publication date
WO2020099085A1 (fr) 2020-05-22
DE102018128903A1 (de) 2020-05-20
EP3880381A1 (fr) 2021-09-22

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