EP2266720A2 - Dispositif et procédé de pliage à forme libre de profilés - Google Patents

Dispositif et procédé de pliage à forme libre de profilés Download PDF

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Publication number
EP2266720A2
EP2266720A2 EP10165523A EP10165523A EP2266720A2 EP 2266720 A2 EP2266720 A2 EP 2266720A2 EP 10165523 A EP10165523 A EP 10165523A EP 10165523 A EP10165523 A EP 10165523A EP 2266720 A2 EP2266720 A2 EP 2266720A2
Authority
EP
European Patent Office
Prior art keywords
bending
sleeve
profile
axis
rollers
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.)
Withdrawn
Application number
EP10165523A
Other languages
German (de)
English (en)
Other versions
EP2266720A3 (fr
Inventor
Martin Kibben
Thomas Flehmig
Oliver Mertens
Urs KÜHNI
Jacob Ziswiler
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.)
Mewag Maschinenfabrik AG
ThyssenKrupp Steel Europe AG
Original Assignee
Mewag Maschinenfabrik AG
ThyssenKrupp Steel Europe AG
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 Mewag Maschinenfabrik AG, ThyssenKrupp Steel Europe AG filed Critical Mewag Maschinenfabrik AG
Publication of EP2266720A2 publication Critical patent/EP2266720A2/fr
Publication of EP2266720A3 publication Critical patent/EP2266720A3/fr
Withdrawn legal-status Critical Current

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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
    • B21D7/04—Bending rods, profiles, or tubes over a movably-arranged forming menber
    • 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

Definitions

  • the invention relates to a device for free-form bending of profiles, with a profile detecting feed unit, one of the feed unit in the feed direction downstream and the profile positively and / or frictionally engaging axial sleeve and one of the axial sleeve in the feed direction downstream bending sleeve, which is connected to the outer contour of the Profile adapted through-opening for the profile, wherein the bending sleeve by means of actuators in a direction orthogonal to the axis of its passage opening plane is linearly adjustable and pivotable about an axis perpendicular to the axis of the passage opening and the direction of linear displacement axis, the axial sleeve is equipped with a drive, with their distance from the bending sleeve is adjustable, and the feed unit and the axial sleeve of rotary drives are driven in the same direction and simultaneously relative to the bending sleeve.
  • the invention further relates to a method for free-form bending of profiles, in particular with a device according to the invention, in which a profile is transported with a feed unit in the feed direction, set in a first movement by horizontal movement of a bending sleeve and simultaneous pivoting about its vertical axis, the curvature of the profile is set in a second movement by changing the relative orientation of the opening of an axial sleeve and the bending sleeve, the torsion of the profile and in a third Movement through the simultaneous rotation of the feed unit, the axial sleeve and the bending sleeve, the turn of the profile is set.
  • the invention also relates to an advantageous use of the device according to the invention.
  • profiles are understood to mean both open and closed profiles.
  • the axial extent of the profiles is greater than their width.
  • the curvature of a profile is understood as an angling of the profile in a plane, the so-called curvature plane.
  • the winding is understood to mean the pivoting of this curvature plane, as a result of which a three-dimensional profile of the profile axis is achieved.
  • the combination of curvature and winding is therefore also referred to as a 3D bending line or a spline.
  • the rotation of the profile is understood in itself, that is, the profile cross-section twisted along the profile axis.
  • a device for free-form bending of pipes in which a feed unit in the feed direction of an axial sleeve is arranged downstream.
  • the axial sleeve is arranged downstream of a bending sleeve in the feed direction.
  • the feed unit and the axial sleeve each have a drive pointing in the feed direction, wherein the axial sleeve is adjustable independently of the feed unit.
  • the feed unit and the axial sleeve rotary actuators for the same direction and simultaneous rotation of the held and guided by them profile.
  • the bending sleeve is translationally adjustable by means of a drive only in an axis extending transversely to the axis of the profile and the feed direction. In addition, it can be pivoted by means of a drive about an axis transverse to the axis of the profile and the feed direction axis.
  • the bending sleeve is also freely co-rotating and the guide sleeve or braked against her stored. With such a device for free-form bending different transformations of pipe profiles are possible.
  • a curvature, a turn or a twist of the profile can be achieved separately from each other. Furthermore, various combinations of the individual transformations are possible. Thus, with this device in profiles with a circular cross section, a bending line with variable curvature and variable winding along the profile axis can be achieved.
  • a profile with non-circular cross-section can perform simultaneously a torsion and a curvature in a plane.
  • the constant or variable torsion of the profile is achieved by the motorized rotation of the guide sleeve relative to the bending sleeve by a constant or variable angle.
  • the rotation by an angle ⁇ and holding at the same profile feed results, for example, a constant torsion of the profile.
  • the size of the angle depends on the distance between the guide sleeve and the bending sleeve, the shape of the profile cross-section and the inserted material.
  • the bending sleeve is braked in its rotation about its central axis fixed. With simultaneous horizontal deflection of the bending sleeve and simultaneous rotation about its vertical axis results in a plane curved and simultaneously twisted profile.
  • a bending line with variable curvature and variable winding along the profile axis can be achieved with said device in a profile with non-circular cross-section.
  • the curvature of the profile via horizontal movement of the bending sleeve relative to the guide sleeve with simultaneous rotation of the bending sleeve about its vertical axis.
  • a rotation of the profile about its longitudinal axis on the guide sleeve and the profile clamping unit is required, while with continuous profile feed the bending sleeve is freely rotatably mounted.
  • the position of the profile cross-section with respect to the orientation of the bending line is accordingly directly dependent on the turn of the bending line.
  • the profile generated by the torsion in the forming area irregularities due to material thinning in the heavily deformed zones.
  • the present invention is based on the technical object to provide an apparatus and a method for free-form bending of profiles, which or which allows an optimized material distribution over the curved profile cross-section.
  • a generic device characterized in that the bending sleeve is provided with at least two bending rollers, wherein at least one of the bending rollers is rotatable about its axis by means of actuators. It has been recognized that the provision of bending rollers in the bending sleeve with actuators for the active rotation of these bending rollers influence on the material distribution in the forming zone of the profiles can be taken to counteract material thinning.
  • the bending rollers can be driven or braked about their rotational axes.
  • the bending roll applied to the outer arch drives the material in the feed direction and the bending roller resting against it slows down the material with respect to the feed direction, larger bends or small bending radii result compared to passively mounted, non-driven bending rolls.
  • At least one of the two bending rollers in the bending sleeve radially deliverable, that is movable in the direction or opposite to the longitudinal axis of the profile to be bent.
  • This freedom of movement of the bending rollers is particularly suitable for the loading and unloading cycle of the profiles, since in particular by the moving apart of the bending rollers, preferably all bending rollers are radially deliverable, the ease of use and handling of the device is facilitated.
  • a radial deliverability of the bending rollers allows a compensation of irregularities in the cross section of the profile to be bent.
  • the bending sleeve is rotatable about the axis of its passage opening by means of actuators.
  • the device it is furthermore possible with the device to produce profiles with sections of constant or variable curvature along the profile axis, superimposed constant or variable turn of the bending line and superimposed constant or variable torsion of the profile. In this way, an influence on the orientation of the profile cross section along the bending line can be achieved with simultaneous winding of the bending line.
  • the axial sleeve is divided along its axis. On the one hand, this allows the accessibility of the profile and thus allows an easier loading and unloading of the profile.
  • a feed device with a relatively low drive power and a so connected cost-effective drive unit is made possible by the fact that additional provided with actuators rollers, especially pairs of rollers are provided. These can then take over part of the feed work.
  • the driven roller or roller pairs are integrated in the axial sleeve. These pairs of rollers make it possible to minimize the remaining, straight, non-deformable end portion of a profile as compared with the prior art, whereby the reject mass can be reduced.
  • rollers with drive belts in the manner of a conveyor belt are provided as a further preferred embodiment. These can be used especially for forming square or rectangular profiles due to the enclosing force application and simultaneous support application.
  • the outer contour of the profile is not circular.
  • the device is particularly suitable because the orientation of the outer contour can be selected as a function of the profile axis. It is conceivable, for example, for a flange provided on the outer contour to be aligned in a manner suitable for connection, without having to accept restrictions with regard to the winding and curvature of the profile.
  • a dynamic and flexible deformation of profiles is further improved in that control means are provided, with which during the movement of the feed unit in the feed direction, the actuators for rotating the Bending rollers can be controlled in the bending sleeve.
  • control means are provided, with which during the movement of the feed unit in the feed direction, the actuators for rotating the Bending rollers can be controlled in the bending sleeve.
  • control means to an electronic memory with commands whose execution cause the control means to control the actuators to rotate the bending rollers in the bending sleeve during the movement of the feed unit in the feed direction.
  • control means comprise a memory with instructions whose execution causes the control means to carry out a method according to the invention as described below.
  • the technical problem is solved in a second teaching of the invention in a generic method in that the bending sleeve is provided with at least two bending rollers, wherein at least one of the bending rollers for adjusting the material flow of the profile is actively rotated about its axis. Due to this active rotation of the bending rollers in the bending sleeve, a material thinning in the highly deformed can be achieved in particular during the various forming steps Zones are counteracted, so that a greater flexibility in the forming of profiles is achieved.
  • the bending sleeve for adjusting the torsion and / or the winding of the profile is actively rotated about the axis of its passage opening.
  • the various forming steps, in particular the winding and the torsion can be performed independently of each other, so that the flexibility in the forming of profiles is further increased.
  • the unrestricted flexibility in the torsion of the profile with respect to the winding and the curvature of the profile is particularly advantageous if the outer contour of the profile is not circular.
  • highly flexible forming results are achieved in accordance with the method in that the curvature, the torsion and the winding of the profile are set at least simultaneously at the same time.
  • continuous transitions between two defined profile areas are possible in this way.
  • one or more sequences of movements from the set of the first, the second and the third movement sequence are carried out simultaneously and / or successively, depending on the time and / or the profile feed.
  • the method allows any combination of torsion, winding and curvature, so that in this way maximum flexibility in the deformation of the profile is achieved and so with respect to their Curvature, winding and torsion arbitrarily shaped profiles can be produced.
  • the technical problem is solved in that the device according to the invention is used for the production of profiles for the production of parts of motor vehicle bodies, in particular for roof frames, H-pillars or windshield frames.
  • the device according to the invention is used for the production of profiles for the production of parts of motor vehicle bodies, in particular for roof frames, H-pillars or windshield frames.
  • high demands are placed on the weight, the stability and the manufacturing costs of the individual components.
  • particularly complicated profile shapes are required for this application.
  • the device according to the invention for the production of such components such complicated shaped profiles can be produced in a single process step. This eliminates the need to use different devices for forming or to add individual components together. In this way, the manufacturing costs can be reduced, and the complex-shaped components produced from a profile have a higher stability due to lack of joint connections. Furthermore, the reject rate can be lowered.
  • FIGS. 1a and 1b a device 2 for free-form bending of a profile 4 of the prior art is shown.
  • the device 2 has a feed unit 6 in the form of a collet known per se, an axial sleeve 8 arranged upstream in the feed direction and a bending sleeve 10 in turn arranged in the feed direction with a passage opening 12.
  • the bending sleeve may be formed as a sliding sleeve. But it can also have a roller guide. Both alternatives serve to be able to move the tube 4 through the passage opening 12 with as little friction as possible.
  • a flexible mandrel 14 which is held at the rear end of the tube 4 via a mandrel 16.
  • the mandrel 16 is connected to the drive 18, so that the mandrel 14 is axially adjustable and controllable.
  • Trained in particular as a pipe collet feed unit 6 has an axial drive 20, which is shown schematically in the drawing by a double arrow.
  • the feed unit 6 has a rotary drive 22 which is represented by a double arrow.
  • the axial sleeve 8 is also associated with a rotary drive 24, which is represented by a double arrow.
  • the rotary actuators 22 and 24 rotate in the same direction and simultaneously.
  • the axial sleeve 8 is associated with an axial drive 26, which is represented by a double arrow.
  • the axial drives 20 and 26 operate independently. With the axial drive 26, the distance from the longitudinally axially fixed bending sleeve 10 can be adjusted.
  • the bending sleeve 10 has a translatory drive 28, which is represented by a double arrow.
  • the bending sleeve 10 has a pivoting drive 30, which is represented by a double arrow.
  • the bending sleeve 10 has a pivot bearing 32 which is represented by a double arrow.
  • the pivot bearing 32 is designed such that, when the profile 4 is to be bent, this transmits the rotational movement of the axial sleeve 8 to the bending sleeve 10, so that it is entrained in a freely rotating manner.
  • this pivot bearing 32 is equipped with a brake, so that there may also be a rotation angle offset between the two parts.
  • the spatial axes x, y, z shown in the drawing are fixed for the axial sleeve 8
  • the spatial axes u, v, w for the bending sleeve 10 are displaceable in space.
  • the bending sleeve 10 in the axial direction, i. is fixed in the direction of the w-axis, but it is co-rotating or braked or driven around this w-axis. In the direction of the u-axis, it is translationally adjustable by means of the drive 28 and rotatable about the v-axis by means of the drive 30.
  • the bending plane is always in the u- / v-plane.
  • a second bend in another direction can be connected to a first bend.
  • the bending radius is on the one hand by the distance between the Axialhülse 8 and the bending sleeve 10 and on the other hand by the settings on the bending sleeve 10, in the direction of the u-axis, and determined about the v-axis.
  • a first embodiment of the device according to the invention or a method according to the invention for free-form bending of profiles is shown, in which the bending sleeve 36 is equipped with a roller guide 38 according to the invention.
  • Fig. 2a shows the bending sleeve 36 from the front and
  • Fig. 2b shows the bending sleeve 36 in supervision.
  • the feed unit and the axial sleeve in this embodiment correspond to in Fig. 1a shown feed unit 6 and the axial sleeve 8 and are in Fig. 2a respectively.
  • Fig. 2b not shown.
  • the roller guide 38 consists of four bending rollers 40, which surround portions of the peripheral surfaces of the profile 42 to be formed. All four bending rollers 40 are actively mounted rotatably about their respective axis of rotation 44. Furthermore, actuators 46 are provided for rotating the bending rollers 40, which in Fig. 2a are shown by arrows. By providing actuators 46 for active rotation of the Bending rollers 40 can be influenced on the material distribution in the curved profile cross-section. For example, a bend in the direction of arrow 48 can be controlled via the bending rollers 40 in such a way that the bending roller 50 shown on the right is driven faster than its opposite left bending roller 52, thereby counteracting targeted material thinning in the forming zone. Further, by the active rotation of the bending rollers 40, a narrower bending radius can be set.
  • the bending rollers 40 are deliverable radially to the longitudinal direction of the profile to be bent 42. This is in Fig. 2a represented by arrows 54.
  • Fig. 2a represented by arrows 54.
  • a divisible axial sleeve 56 shown whose parts are connected by a hinge 58 with each other.
  • the two parts of the axial sleeve 56 can be opened and closed against each other. This division allows easier handling of the loading and unloading of a profile 42, which in Fig. 3 indicated by a line.
  • a in Fig. 4a illustrated third embodiment of a device according to the invention or a method according to the invention are in an axial sleeve 60 rollers 62 with actuators, not shown integrated.
  • the active control of the rollers 62 on the one hand in Fig. 4a not shown feed device are provided with a lower drive power over the prior art.
  • this arrangement can be achieved an increased degree of deformation and at the same time the reject rate can be reduced.
  • an in Fig. 4a not shown feed device in the form of a clamping tongue only to the position shown in dashed lines 64 are moved.
  • the roller 62 can take over the advancement of the profile 42 to be bent in the direction of the bending sleeve 66, so that a further bending distance can be achieved by, for example, the amount ⁇ .
  • the advantages correspond to those of the fourth embodiment. These arrangements are preferably used in square or rectangular profiles, in which a full-surface support of the profile to be bent is possible.
  • Fig. 5 shown device 80 of a fifth embodiment of a device according to the invention or a method according to the invention additionally has actuators 82, with which the bending sleeve 84 is rotatable about the axis of its passage opening with bending rollers, not shown.
  • the actuators 82 are in Fig. 5 shown schematically as an arrow.
  • a sixth embodiment of an inventive device 90 and a method according to the invention is shown, wherein the feed unit 6, the axial sleeve 8 and the bending sleeve 92 with bending rollers, not shown, have a rectangular, in particular a square cross-section and are thus adapted to the cross section of the profile 94.
  • the profile 94 is as in Fig. 6 shown by pivoting and translation of the bending sleeve 92 curved in a plane.
  • Fig. 7 shows a seventh embodiment of the method and the device according to the invention, in which the actuators 100 of the bending rollers 40 in the bending sleeve 36 and the bending sleeve 36 are themselves connected to control means 102 with which the actuating means 100 can be controlled.
  • the control means 102 may optionally include an electronic memory 104 in which instructions are stored whose execution cause the control means 102, the actuators 100 for rotating the bending rollers 40 in the bending sleeve 36 and / or the bending sleeve 36 itself during the movement of the feed unit 6 in To control the feed direction.
  • the actuators 106 and 108 of the axial sleeve 8 and the feed unit 6 with the Control means 102 may be connected so that both the feed unit 6 and the axial sleeve 8 and the bending rollers 40 in the bending sleeve 36 and the bending sleeve 36 can be controlled by the control means 102 at the same time.
  • the control means 102 may be, for example, a computer or a switching logic.
  • the electronic memory 104 preferably has instructions whose execution cause the control means 102 to perform a method according to the invention.
EP10165523A 2009-06-17 2010-06-10 Dispositif et procédé de pliage à forme libre de profilés Withdrawn EP2266720A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009025988A DE102009025988A1 (de) 2009-06-17 2009-06-17 Vorrichtung und Verfahren zum Freiformbiegen von Profilen

Publications (2)

Publication Number Publication Date
EP2266720A2 true EP2266720A2 (fr) 2010-12-29
EP2266720A3 EP2266720A3 (fr) 2011-05-25

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DE (1) DE102009025988A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2594346A1 (fr) * 2011-11-15 2013-05-22 ThyssenKrupp Steel Europe AG Procédé et dispositif de fabrication de profils dotés d'une déformation à position variable et orientée en longueur
WO2015144103A1 (fr) * 2014-03-25 2015-10-01 Technische Universität Dortmund Procédé et dispositif de fabrication incrémentielle de fils, de tubes, de profilés ou similaires cintrés, à partir de matériaux métalliques en forme de barre
CN107952845A (zh) * 2017-11-21 2018-04-24 南京航空航天大学 多辊摩擦轴向补料及截面畸变在线矫正弯曲模和方法
CN108080458A (zh) * 2017-12-13 2018-05-29 南京航空航天大学 一种三轴自由弯曲局部渐进成形装置及方法
CN114346028A (zh) * 2021-12-26 2022-04-15 南京航空航天大学 一种型材螺旋构件六轴自由弯扭成形系统及方法
CN114986174A (zh) * 2022-04-29 2022-09-02 沈阳飞机工业（集团）有限公司 超长变曲率异形型材零件的加工模具及加工方法
DE102021109205A1 (de) 2021-04-13 2022-10-13 Man Truck & Bus Se Herstellungsverfahren für ein Strukturbauteil eines Lastkraftwagens oder eines Omnibusses

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Publication number Priority date Publication date Assignee Title
DE102018114580A1 (de) 2018-06-18 2019-12-19 copperING S.r.l. Verfahren und Vorrichtung zum Formen eines Wicklungselements
DE102019124477A1 (de) * 2019-09-12 2021-03-18 Gehring E-Tech Gmbh Verfahren und Vorrichtung zum Formen von Wicklungselementen
CN112845733B (zh) * 2021-01-14 2023-02-28 西北工业大学 一种用并联臂式结构控制的用于自由弯曲成形工艺的模具

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2594346A1 (fr) * 2011-11-15 2013-05-22 ThyssenKrupp Steel Europe AG Procédé et dispositif de fabrication de profils dotés d'une déformation à position variable et orientée en longueur
WO2013072414A1 (fr) * 2011-11-15 2013-05-23 Thyssenkrupp Steel Europe Ag Procédé et dispositif destinés à la fabrication de profilés présentant une protubérance qui s'étend en longueur et dont la position est variable
WO2015144103A1 (fr) * 2014-03-25 2015-10-01 Technische Universität Dortmund Procédé et dispositif de fabrication incrémentielle de fils, de tubes, de profilés ou similaires cintrés, à partir de matériaux métalliques en forme de barre
CN107952845A (zh) * 2017-11-21 2018-04-24 南京航空航天大学 多辊摩擦轴向补料及截面畸变在线矫正弯曲模和方法
CN107952845B (zh) * 2017-11-21 2019-11-15 南京航空航天大学 一种薄壁管三维自由弯曲的方法
CN108080458A (zh) * 2017-12-13 2018-05-29 南京航空航天大学 一种三轴自由弯曲局部渐进成形装置及方法
CN108080458B (zh) * 2017-12-13 2019-11-29 南京航空航天大学 一种三轴自由弯曲局部渐进成形装置及方法
DE102021109205A1 (de) 2021-04-13 2022-10-13 Man Truck & Bus Se Herstellungsverfahren für ein Strukturbauteil eines Lastkraftwagens oder eines Omnibusses
CN114346028A (zh) * 2021-12-26 2022-04-15 南京航空航天大学 一种型材螺旋构件六轴自由弯扭成形系统及方法
CN114346028B (zh) * 2021-12-26 2022-12-16 南京航空航天大学 一种型材螺旋构件六轴自由弯扭成形系统及方法
CN114986174A (zh) * 2022-04-29 2022-09-02 沈阳飞机工业（集团）有限公司 超长变曲率异形型材零件的加工模具及加工方法
CN114986174B (zh) * 2022-04-29 2024-03-08 沈阳飞机工业（集团）有限公司 超长变曲率异形型材零件的加工模具及加工方法

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DE102009025988A1 (de) 2010-12-30
EP2266720A3 (fr) 2011-05-25

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