EP2144720B1 - Procédé et dispositif pour le pliage de profilés - Google Patents

Procédé et dispositif pour le pliage de profilés Download PDF

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Publication number
EP2144720B1
EP2144720B1 EP08734653A EP08734653A EP2144720B1 EP 2144720 B1 EP2144720 B1 EP 2144720B1 EP 08734653 A EP08734653 A EP 08734653A EP 08734653 A EP08734653 A EP 08734653A EP 2144720 B1 EP2144720 B1 EP 2144720B1
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EP
European Patent Office
Prior art keywords
roller
bending
roller system
longitudinal axis
component
Prior art date
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Not-in-force
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EP08734653A
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German (de)
English (en)
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EP2144720A1 (fr
Inventor
Matthias Hermes
Matthias Kleiner
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Technische Universitaet Dortmund
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Technische Universitaet Dortmund
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Publication of EP2144720A1 publication Critical patent/EP2144720A1/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
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • 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
    • B21D7/04—Bending rods, profiles, or tubes over a movably-arranged forming menber

Definitions

  • the invention relates to a method for the planar and spatial bending of rod-shaped, having a longitudinal axis components, such as tubes and profiles (2), with two along the longitudinal axis successively arranged roller systems A and B, wherein the component driven by the roller system A and in the Roller system B is introduced and wherein by a movement of the roller system B relative to the roller system A transversely to the longitudinal axis while the component is transported by the roller systems, the rod-shaped member is bent.
  • the invention also relates to a device for carrying out the method.
  • a method and a device of the type mentioned is from the DE 197 17 232 A1 known.
  • a gimbal-mounted bending head station is used, which has 4 cross-shaped arranged in end shields rolls / rollers.
  • For the propulsion of the profile to be bent support rollers are used, which are set before the bending process and detected in this position.
  • NC program a control program for a bending device in which the springback when twisting the profile to be deformed is to be counteracted.
  • a control signal is formed from the difference between the theoretically calculated relative rotation and the actual relative rotation. The profile is then twisted until the permanent torsion corresponds to the desired value, even after springing back the profile.
  • the object of the present invention is to provide a method and a device in order to be able to bend any rod-shaped components in two or three dimensions without springback. It should be bent in two or three dimensions in addition to cross-sectionally circular tubes and any profile cross-sections. The total length of the tubes and profiles should not be limited by the structure of the device according to the invention.
  • dumbbells For bending pipes, mainly dumbbells are used today ( Franz, W.-D .: wortlles Rohrbiegen. Procedures and machines. VDI publishing house, ISBN 3-18-400814-2, 1988 ).
  • 3D bending the pipe to be bent is rotated by rotating the tube cross-section and brought into another bending plane in these machines, in which then bent further. This change in the bending planes produces corresponding 3D contours.
  • only fixed, predetermined by the bending tools radii are possible.
  • the generation of 3D bends in profiles on such machines is impossible because changing the bending plane in a profile, unlike tubes with a circular cross-section, the required tool cross-section changes.
  • any rod-shaped components can be bent in two or three dimensions.
  • any desired profiles can be bent two- or three-dimensionally, with the total length of the tubes or profiles not being limited by the construction of the device according to the invention.
  • the invention according to claim 1 relates to a method of bending rod-shaped members having a longitudinal axis, such as e.g. Tubes or profiles in which the propulsion of the pipe or profile through the machine via a first roller system A, the transport rollers, frictionally engaged.
  • a second roller system B At the output of the machine, a second roller system B, the bending rollers, arranged.
  • the roller system A As a drive tilting or distortion of a component between a pusher and Biegehülsen, as they occur in known devices avoided.
  • the rollers of the roller system A can be arranged in a plane, or they can be arranged distributed around the tube or profile cross-section, wherein they partially or completely enclose them.
  • the introduction of force takes place via a plurality of rollers lying next to and / or behind one another on the component.
  • rollers on the pipe or profile exerting a force acting substantially perpendicular to the pipe or profile longitudinal axis force to improve the frictional propulsion.
  • the rollers may be profiled and / or have a coating which optimizes the frictional contacts.
  • roller profiling which are pressed elastically on the component surface, the holding force of the roller system A is advantageously increased.
  • elastic coatings the pressure force is distributed more evenly and a plastic deformation of the Component in the roller system A preferably avoided at superimposed shear forces.
  • Such a coating may consist of a polymer. In a particularly advantageous embodiment, it consists of a vulcanized layer of an Elasiomers.
  • roller system A with controlled adjustable contact pressure components of different wall thickness or of different materials of different elasticity can be supplied to the roller system B with part and component dependent set holding force advantageous.
  • a plastic deformation in the roller system A is thus reliably avoided and the deformation in the area of the forming zone always achieves the same result.
  • a bent components can be provided with a constant production speed.
  • This production can be integrated particularly advantageous in clocked, continuous production processes.
  • the roller drive system components of any length can be presented at a constant speed.
  • the second roller system B At the output of the machine, the second roller system B, the bending rollers, arranged.
  • the roller system B consists of pairs arranged around the pipe or profile circumference rollers.
  • the entire roller system B is disposed on an independent support system and movable relative to the roller system A in at least a first plane.
  • the bend of the tube or profile is made by changing the relative position of the roller systems A and B to each other while the tube or profile is being transported by the roller systems.
  • a transverse force is preferably distributed uniformly over the component cross section.
  • a tangential support of the roller system B is guaranteed on the component. Rollers with a larger contact surface are tracked during bending in tangential alignment of the support surface to the component surface. Tilting of the component between the roller systems A and B is thus safely avoided.
  • the roller systems enclosing the rod-shaped component have adjusting mechanisms.
  • the roll systems can be be adjusted by each adjustable in their distance from the longitudinal axis rollers on components with asymmetrically profiled sections having different cross-sections.
  • Such structured sections can be bent in sections, adjusting the roller systems to the changed component cross-section directly, without lengthy replacement of roles.
  • the contact pressure of the rollers can be adjusted to ensure a frictional transport in the roller system A.
  • the rollers of the roller system B are thereby preferably set to a low coefficient of friction, which additionally favors the sliding of the component along the preferably tangentially guided bearing surfaces of the rollers.
  • the rollers of the roller system B are likewise drivable.
  • the drive of the component takes place at an angle ⁇ to the longitudinal axis of the rod-shaped component.
  • About frictional contact in the roller bearing surfaces can be superimposed by increased or reduced propulsion of the roller system B in the forming zone between the roller systems an additional tensile or compressive stress.
  • the roller system B in a further plane, which is aligned at right angles to the first plane E1, by a rotational angle ⁇ rotatable.
  • the rotational angle ⁇ is varied in the process of the roller system so that the bearing surfaces of the rollers are guided tangentially to the component surface.
  • the roller system B in a further plane, which is aligned at right angles to the first plane, by a rotational angle ⁇ rotatable.
  • the rotational angle ⁇ is varied in the process of the roller system so that the bearing surfaces of the rollers are guided tangentially to the component surface.
  • the roller systems A and B are each rotatable about the profile longitudinal axis by appropriate rotary mechanisms.
  • the bending plane can be rotated about the profile longitudinal axis, whereby a third plane can be influenced and 3D-curved components can be produced.
  • the first axis moves the roller system at the exit of the machines and thus generates the bending of the profile. Due to the rotation of the roller systems A and B, the second axis makes it possible to change the bending planes and thus the bending of 3D contours.
  • a torsional moment is introduced into the bending zone between the roller system A and the roller system B.
  • the axis of rotation of the machine is set around the profile longitudinal axis at different angles in the outlet roller system and in the other roller systems. This can be done, as with all moving axes of the machine, by manual or NC control of the drive axles, which may be electrical or hydraulic.
  • a mandrel system is mounted, which comprises a mandrel, e.g. holds in a limb-dome-like design, in the forming zone of the process and so the occurrence of cross-sectional deformations z. B. may occur in hollow sections, reduced.
  • Fig. 1 one sees an exemplary embodiment of the invention.
  • two profiled roller pairs 1 have been arranged one behind the other for the axial drive of the profile 2.
  • These pairs of rollers are arranged on a housing 4, in which the corresponding drive of all roles and a mechanism for adjusting and pressing the pairs of rollers are integrated.
  • the ring 5 and the shaft socket 6 are mounted, which allow in the bearing housings 7 and 8, a rotation of the entire housing.
  • This rotational movement is in this embodiment by a hydraulic cylinder 9, which allows in this case a rotation of 90 degrees in total; but here is also a rotary drive (electrical or hydraulic type), which would enable a full 360 degrees.
  • a hydraulic cylinder 9 which allows in this case a rotation of 90 degrees in total; but here is also a rotary drive (electrical or hydraulic type), which would enable a full 360 degrees.
  • the roller system 3 which is located at the outlet of the machine is executed like a die and encloses the profile cross-section of four sides by means of bending rollers 3a, b, c, d. It can also be adjusted radially when changing the profile type to the corresponding profile cross-section.
  • This system is also able in this embodiment to carry out the rotation about the longitudinal axis of the profile to be bent, and is also driven. This allows in this embodiment, in addition to changing the bending plane, the introduction of a torsional moment in the process with the advantages mentioned above.
  • An additional axis of rotation perpendicular to the profile longitudinal axis is required to ensure the tangency of the roller assembly with changing bending radii.
  • the formation of the bending radii is achieved by the method of the carriage 10 on the linear axis 11, which generates the bending radius by its relative position.
  • FIG. 2 one can see a sectional drawing of the exemplary embodiment of the invention.
  • the assembly with the transport rollers 1 is denoted by A there, the entire assembly with the bending rollers 3a, 3b, 3c, 3d with B.
  • Fig. 3 is a front view of the device, in which also the cutting of Fig. 2 is shown with the bending rollers 3a, 3b, 3c, 3d shown.
  • Fig. 4 shows a plan view of the system, in which the machine setting of the bending roller assembly for bending a left bend with the radius R1 and the angle ⁇ is drawn.
  • a change of the bending plane is clarified.
  • a new radius R2 is bent in a new bending direction and bending plane in the profile 2 likewise twisted about the longitudinal axis.
  • a tactile contour sensor 12 is mounted, which tracks the bends with a roller and the profile during the process missing. This makes it possible to correct the setting parameters of the machine axes in order to arrive at the required bending contour.
  • profile-specific material properties can also be determined with the device and the method according to the invention and the data obtained from this can be used for accurate process simulation and improved process planning. This is done advantageously in that in the pairs of rollers A and / or B sensors for measuring the forces and moments occurring during bending and twisting of the profile are arranged. From this and optionally in conjunction with the data determined by the aforementioned contour sensor, the profile-specific material data required for process simulation or improved process planning can be determined by means of conventional programs.
  • a process planning tool is shown schematically as a block diagram.
  • the profile 2 leaves the roller system 3
  • its bending contour is detected via the contour sensor 12 and thereby the bending radius R b is input via line 12 a into a process computer 13.
  • the bending moment encoder 14 arranged on the carriage 10 is connected to the process computer 13 in order to determine the bending moment M b .
  • the process data for an accurate process simulation 13 a and an improved process planning are used in the process computer 13. It is therefore possible to refer to the entire device as a process planning device, with the help of which two- or three-dimensional bends can be optimized in terms of process technology.
  • An additional extension and improvement of the device according to the invention is achieved by the use of a special cutting tool for flying Disconnect allows.
  • This additional device is particularly useful for applications in which very long semi-finished products (profile 2 in the example) used or manufactured by coil profiles are processed.
  • FIG. 9 shows such a cutting tool for flying separation, which is installed at the end of the device according to the invention in the region of the bending rollers 3a, b, c, d of the roller system 3.
  • FIG. 9 To be considered as an exemplary solution presented cutting tool for flying separation.
  • the movement of the extendable cutting blade 16 is initiated via a cutting hydraulic cylinder 17.
  • the cutting tool can not only be realized in the form of a shear cut, but also in the form of a cutting tool with rotating tool movement, with effect of several sides or by a cutting or thermal cutting process. It is advantageous that the orientation of the cutting tool is always carried tangentially to the profile contour. Also, the fixed installation at the end of the bending device makes sense, since it allows a flying cut during the process without consuming entraining devices.

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

Claims (21)

  1. Procédé pour courber dans le plan et dans l'espace de pièces en forme de barre présentant un axe longitudinal, telles que des tubes et des profilés (2), avec deux systèmes de rouleaux A et B disposés l'un derrière l'autre le long de l'axe longitudinal, la pièce étant entraînée par le système de rouleaux A et introduite dans le système de rouleaux B, et la pièce en forme de barre est courbée par un mouvement du système de rouleaux B par rapport au système de rouleaux A en direction transversale à l'axe longitudinal pendant le transport de la pièce à travers les systèmes de rouleaux, caractérisé en ce que pour compenser le retour élastique, les zones de courbage des systèmes de rouleaux A et B se voient appliquer de manière contrôlée des couples de torsion, et en ce que les pièces se voient appliquer pendant le courbage, en plus de la contrainte de courbage, une contrainte de torsion contrôlée.
  2. Procédé selon la revendication 1, caractérisé en ce que le système de rouleaux A est constitué de rouleaux (1) se faisant face par paire et aptes à être réglés et entraînés séparément par rapport à la distance de l'axe longitudinal, et en ce que les rouleaux (1) du système de rouleaux A entourent la pièce partiellement ou totalement dans au moins un plan de section transversale, et pendant l'avance continue, par l'intermédiaire du système de rouleaux A, les pièces tournent autour de l'axe longitudinal dans un premier plan E1.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que la pièce est guidée, par l'intermédiaire du système de rouleaux B, par des surfaces de pression opposées des rouleaux s'appliquant sur la pièce, un déplacement transversal du système de rouleaux B par rapport à l'axe longitudinal et une rotation simultanée autour d'un axe central perpendiculaire à l'axe longitudinal du système de rouleaux B permettant le courbage des pièces avec un contour de courbage contrôlé.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'en cas de rayons de courbure variables, les surfaces de pression des rouleaux du système de rouleaux B sont ajustées de façon à être tangentielles à la surface de la pièce.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que les rouleaux (1, 3a - 3d) des systèmes de rouleaux A et B peuvent être appliqués sous pression perpendiculairement à l'axe longitudinal des pièces, la force de pression étant ajustée de manière à avoir un contact par friction à réglage défini.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le système de rouleaux B est conçu de manière rotative par rapport à l'axe longitudinal de la pièce et subit simultanément un déplacement relatif par rapport au système de rouleaux A selon deux autres axes dans l'espace, la pièce sortant perpendiculairement au plan défini par le système de rouleaux B, à vitesse constante.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le système de rouleaux A permet une avance dans le sens longitudinal et le système de rouleaux B un entraînement de la pièce selon un angle α par rapport à l'axe longitudinal des pièces en forme de barre.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que pendant l'avance continue, le système de rouleaux B subit une rotation dans au moins un autre plan, orienté à angle droit par rapport au premier plan, et pendant le processus de courbage, par déplacement du système de rouleaux B, un angle de rotation β est modifié de sorte que les rouleaux (3a - 3d) viennent s'appliquer de façon tangentielle à la surface de la pièce.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un changement des plans de courbage se fait par un déplacement transversal et une rotation simultanée des systèmes de rouleaux A et B l'un par rapport à l'autre autour de l'axe longitudinal respectif.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que le contour d'une pièce courbée est enregistré par au moins un capteur, il est transformé en données et les données sont acheminées à une unité de contrôle avec programme de correction pour le réglage de la machine, et en ce que lecourbage de la pièce est exploré en sortie du système de rouleaux B, de préférence au moyen d'un capteur de contour (12), et en cas d'écart par rapport au contour de consigne, les paramètres de réglage α, β et le déplacement transversal des paires de rouleaux A, B sont modifiés de manière à compenser l'écart mesuré par le capteur de contour.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que les forces et les couples intervenant dans lecourbage sont mesurés automatiquement dans les paires de rouleaux A et/ou B et sur la base dee ces mesures on détermine les propriétés de matériau spécifiques du profilé que l'on utilise pour une simulation de processus précise et une planification de processus améliorée, et en ce que les données obtenues par le capteur de contour (12) sont de préférence mémorisées et traitées conjointement avec les forces et les couples mesurés sur les paires de rouleaux A et/ou B pour la simulation de processus et la planification de processus.
  12. Procédé pour courber dans le plan et dans l'espace de pièces en forme de barre présentant un axe longitudinal, telles que des tubes et des profilés (2), avec deux systèmes de rouleaux A et B disposés l'un derrière l'autre le long de l'axe longitudinal selon l'une des revendications précédentes, caractérisé en ce que le système de rouleaux A exerce un mouvement d'avance dans le sens longitudinal et le système de rouleaux B effectue un mouvement dans le sens transversal par rapport à l'axe longitudinal des pièces en forme de barre,
    en ce que pendant l'avance continue des pièces le long de l'axe longitudinal par l'intermédiaire du système de rouleaux A, un courbage est mis au point dans un premier plan, par positionnement relatif des systèmes de rouleaux A et B l'un par rapport à l'autre dans le premier plan, et
    en ce qu'un courbage ou une torsion dans au moins un autre plan est mis au point, par rotation des systèmes de rouleaux A et B l'un par rapport à l'autre et autour de la position respective de l'axe longitudinal ou transversal dans la pièce.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que dans le système de rouleaux A les pièces sont entraînées et guidées par friction par les rouleaux, et dans le système de rouleaux B elles sont entraînées par des surfaces d'appui opposées des rouleaux.
  14. Procédé selon la revendication précédente, caractérisé en ce que les pièces sont soumises pendant le courbage, par zones, à une contrainte de traction ou de compression contrôlée.
  15. Dispositif pour courber dans le plan et dans l'espace de pièces en forme de barre présentant un axe longitudinal, telles que des tubes et des profilés (2), avec deux systèmes de rouleaux A et B, dans lequel l'avance le long de l'axe longitudinal peut être accomplie par l'intermédiaire du système de rouleaux A et dans lequel les systèmes de rouleaux A, B sont disposés de manière à pouvoir se déplacer l'un par rapport à l'autre dans au moins un premier plan E1, caractérisé en ce que les systèmes de rouleaux A et B sont aptes à tourner autour de l'axe longitudinal de profilé et en ce que la position relative des systèmes de rouleaux A et B l'un par rapport à l'autre pour le courbage peut être modifiée pendant le transport de la pièce à travers les systèmes de rouleaux.
  16. Dispositif selon la revendication 15, caractérisé en ce que les rouleaux du système de rouleaux B peuvent eux aussi être entraînés, auquel cas une contrainte de traction ou de compression supplémentaire est appliquée à travers un contact par friction dans les surfaces d'appui des rouleaux et par une avance augmentée ou diminuée du système de rouleaux 8 au niveau de la zone de déformation entre les systèmes de rouleaux.
  17. Dispositif selon l'une des revendications précédentes 15 à 16, caractérisé en ce que des capteurs destinés à mesurer les forces et les couples intervenant dans le courbage et la déformation du profilé sont placés dans les systèmes de rouleaux A et/ou B et en ce que facultativement un capteur de contour (12) destiné à explorer le courbage de la pièce est prévu en plus en sortie du système de rouleaux B, tous les capteurs pouvant être reliés entre eux au moyen d'un ordinateur de processus (13) pour la détermination des propriétés de matériau spécifiques du profilé et pour la simulation précise du processus et une planification de processus améliorés.
  18. Dispositif selon l'une des revendications précédentes 15 à 17, caractérisé en ce que les systèmes de rouleaux sont mobiles indépendamment l'un de l'autre sur plusieurs axes dans l'espace ou dans au moins un plan et en ce que facultativement les angles de rotation des axes d'entraînement des systèmes de rouleaux A et B sont réglables individuellement, les axes d'entraînement à commande manuelle ou numérique étant de préférence réglables électriquement ou hydrauliquement.
  19. Dispositif selon l'une des revendications précédentes 15 à 18, caractérisé en ce qu'un chemin de guidage de la pièce en forme de barre se termine juste derrière le dernier ensemble de rouleaux avec orientation dans un plan fixe dans l'espace.
  20. Dispositif selon l'une des revendications précédentes 15 à 19, caractérisé en ce que les dispositifs à rouleaux ont un mécanisme permettant d'ajuster la position des rouleaux à des sections de pièce variables, et en ce que de préférence certains rouleaux ou tous les rouleaux sont profilés, et en ce que notamment certains rouleaux ou tous les rouleaux sont munis d'un revêtement optimisé en termes de frottement.
  21. Dispositif selon l'une des revendications précédentes 15 à 20, caractérisé en ce que le dispositif comprend à la partie arrière un système de mandrin destiné à réduire les déformations de section, et en ce que certains rouleaux ou tous les rouleaux sont munis d'un revêtement optimisé en termes de frottement, qui peut être en polymère, de préférence en élastomère.
EP08734653A 2007-03-20 2008-03-19 Procédé et dispositif pour le pliage de profilés Not-in-force EP2144720B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007013902A DE102007013902A1 (de) 2007-03-20 2007-03-20 Vorrichtung zum Profilbiegen
PCT/EP2008/002171 WO2008113562A1 (fr) 2007-03-20 2008-03-19 Procédé et dispositif pour le pliage de profilés

Publications (2)

Publication Number Publication Date
EP2144720A1 EP2144720A1 (fr) 2010-01-20
EP2144720B1 true EP2144720B1 (fr) 2013-01-30

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Application Number Title Priority Date Filing Date
EP08734653A Not-in-force EP2144720B1 (fr) 2007-03-20 2008-03-19 Procédé et dispositif pour le pliage de profilés

Country Status (7)

Country Link
US (1) US9227236B2 (fr)
EP (1) EP2144720B1 (fr)
JP (1) JP5460338B2 (fr)
KR (1) KR101478852B1 (fr)
CN (1) CN101707940B (fr)
DE (1) DE102007013902A1 (fr)
WO (1) WO2008113562A1 (fr)

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JP5589609B2 (ja) * 2009-06-30 2014-09-17 新日鐵住金株式会社 補正機能を有する屈曲部材の製造装置
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US9636162B2 (en) 2011-12-05 2017-05-02 Dignity Health Surgical rod bending system and method
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EP2144720A1 (fr) 2010-01-20
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CN101707940A (zh) 2010-05-12
JP5460338B2 (ja) 2014-04-02
KR101478852B1 (ko) 2015-01-02
DE102007013902A1 (de) 2008-09-25
KR20090127932A (ko) 2009-12-14
US9227236B2 (en) 2016-01-05
WO2008113562A1 (fr) 2008-09-25
CN101707940B (zh) 2014-03-19

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