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EP2548668B1 - Procédé pour le dressage automatique de pièces allongées par torsion - Google Patents

Procédé pour le dressage automatique de pièces allongées par torsion Download PDF

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Publication number
EP2548668B1
EP2548668B1 EP11405290.5A EP11405290A EP2548668B1 EP 2548668 B1 EP2548668 B1 EP 2548668B1 EP 11405290 A EP11405290 A EP 11405290A EP 2548668 B1 EP2548668 B1 EP 2548668B1
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EP
European Patent Office
Prior art keywords
workpiece
straightening
torsion
measuring
measurement
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
EP11405290.5A
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German (de)
English (en)
Other versions
EP2548668A1 (fr
Inventor
Peter Frauenfelder
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.)
Cesare Galdabini SpA
Original Assignee
Galdabini Prazisions Maschinen AG
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Publication date
Application filed by Galdabini Prazisions Maschinen AG filed Critical Galdabini Prazisions Maschinen AG
Priority to EP11405290.5A priority Critical patent/EP2548668B1/fr
Publication of EP2548668A1 publication Critical patent/EP2548668A1/fr
Application granted granted Critical
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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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting

Definitions

  • the invention relates to a method for automatically torsional straightening of elongated workpieces in a torsion straightening machine, comprising two opposite holding devices for introducing a torque onto the workpiece and with a measuring device for measuring the workpiece, wherein the measuring device and the workpiece are moved relative to one another.
  • Known Torsionsrichtmaschinen consist essentially of a fixed head, which holds the workpiece against rotation and a torsion head, which should eliminate an error detected on the workpiece.
  • the appropriate angle of rotation for the correction of the existing error is learned and optimized on the basis of already oriented workpieces, so that an optimal directional time can be achieved.
  • Torsionsmagazin it is also known to measure with a measuring device in the workpiece to be machined at intervals of, for example, 500 mm, the inclination of the workpiece and then to eliminate the detected error by torsion. After each measurement, the workpiece is re-clamped.
  • the directional accuracy is essentially dependent on the experience of the operator.
  • the guideline time is comparatively high because, as mentioned, the workpiece must be re-clamped after each measurement. The workpiece often remains taut until the torsion is directed through 0 to n strokes in tolerance. Only then the profile is released and re-clamped at another point.
  • the invention has for its object to provide a method of the type mentioned, which allows a higher torsional accuracy and a shorter guide time.
  • the problem is solved according to claim 1.
  • the workpiece in the torsion straightening machine is measured at least once essentially continuously between its two ends and without restoring the workpiece substantially continuously following it in the torsion straightening machine.
  • the workpiece in particular a profile-like workpiece is measured continuously. Due to the measurement, an area with maximum torsion can be determined. By moving the holding devices, it is then possible in particular to direct this area. Thus, only this part of the workpiece is aligned.
  • the measuring steps and the corresponding straightening steps can subsequently be carried out essentially as desired. On the basis of the continuous measurement, in each case a curve is recorded which shows the inclination or torsion at the corresponding point of the workpiece.
  • One or both fixtures are then driven to the area having the maximum torsion.
  • bending bending is conceivable before or after the torsion.
  • the Torsionsfeld and optionally the Bie shareen can be carried out largely automatically.
  • As measuring device is an optical measuring device, for example, such with a laser. This preferably generates on the surface to be measured an optical strip which extends substantially and preferably at right angles to the longitudinal direction of the workpiece.
  • essentially continuous means that the workpiece is measured in steps of less than 20 mm, preferably 10 mm or shorter.
  • the individual measurements are recorded and, as mentioned, preferably recorded on a display as a curve. This curve is used to determine the area with maximum torsion.
  • a tactile measuring device is also conceivable instead of an optical or laser-optical measuring device.
  • the optical measuring device to project a line onto the workpiece during the measuring process.
  • the inclination of the workpiece or the measured surface of the workpiece is preferably measured and recorded.
  • two or more measuring devices are conceivable instead of a single measuring device.
  • a slope curve is recorded during the measuring process.
  • the workpiece is preferably moved. In principle, it would also be possible to move the measuring device.
  • the workpiece is measured along its entire length.
  • the location or the area of the workpiece is determined which, according to the measurement, has the greater straightening requirement and which is initially directed at this area by the exertion of a torque.
  • the straightening is done by exerting a corresponding twisting action with a certain angle.
  • the measuring process and the torsion are performed several times in succession.
  • the workpiece is preferably located on two spaced-apart pads that can be moved on a table.
  • At least one of the holding devices for performing a torsion process is rotatable. This holding device is then corresponding to the torsion head. The other holding device is the fixed head.
  • the rotatable holding device is open and thus for directing from the outside at any point of the workpiece to this can be applied.
  • the holding device is for example C-shaped with a radially outwardly open recess.
  • the holding device or the torsion head can then be moved to the desired location and placed from the outside on the workpiece. The placement is thus transverse to the longitudinal direction of the workpiece. This means that every part of the workpiece can be approached very quickly and precisely become. After placing the holding device on the workpiece this is clamped and subjected to a suitable torsion.
  • one of the holding devices has a straightening die and a straightening pad, between which the workpiece can be fixed for straightening.
  • This holding device then forms the so-called fixed head.
  • This fixed head allows a secure and precise fixation of the workpiece at the appropriate position.
  • This holding device or the fixed head is preferably fixedly connected to the table. In principle, however, a design is conceivable in which this holding device or the fixed head is also movable.
  • the area with the maximum torsion requirement is determined after at least one measuring operation. This determination is preferably made by a suitable controller and said area is recorded visually. For torsion then preferably the workpiece is moved. In addition, the torsion head is placed in the appropriate place.
  • a straightening machine 23 shown in a greatly reduced representation has an elongated table 8 on which two supports 11 and 12 are movably mounted.
  • the arrows 13 to 16 show the possible directions of travel of these requirements 11 and 12.
  • a workpiece 1 is mounted on these supports 11 and 12.
  • This workpiece 1 can be removed upwards from the supports 11 and 12 above.
  • the workpiece 1 is in particular a profile with an upper side 1a. In the method, the workpiece 1 can be clamped by the supports 11 and 12 or otherwise fixed.
  • a first holding device 2 which forms a so-called fixed head. It has two cylinders 17, for example, electric cylinders, with which two jaws 18 in the directions of the double arrows 19 are movable. With these two jaws 18, the workpiece 1 can be fixed at the desired location.
  • One of the jaws 18 may form a straightening die and the other a straightening pad. Conceivable here are also other fixed heads. The fixing or the release of the workpiece 1 via a controller, not shown here.
  • a second holding device 3 is arranged on the table 8.
  • This second holding device 3 forms the torsion head and is preferably movable along the table 8.
  • the second holding device 3 is provided with a measuring device 4, which is preferably an optical measuring device and more preferably a laser-optical measuring device. With this can be directed downwards against the workpiece 1, an optical beam 5, which records a line 5a on the top 1a. The measurement can also be made laterally against the workpiece, thus not necessarily from top to bottom. This preferably extends transversely to the longitudinal direction of the workpiece 1.
  • the workpiece 1 can be measured from a first end 6 to a second end 10 with respect to the inclination of the upper side 1a and / or one of the two side surfaces.
  • the underside not visible here could also be measured.
  • the workpiece 1 is moved in its longitudinal direction.
  • the result of this measurement is according to Fig. 5 displayed on a display or the like as a curve.
  • a region B with maximum torsion or with maximum torsional requirement is determined.
  • the length of this region can be, for example, 100 or 200 mm or even longer, for example 500 to 2000 mm, or shorter. But here are also longer and shorter areas conceivable.
  • the measurement is carried out in very small steps, for example in steps of less than 20 mm, preferably 10 mm and less mm.
  • the said range is thus correspondingly larger than, for example, 10 mm or 20 mm.
  • these are thus comparatively small steps.
  • the Fig. 4 shows how the workpiece 1 with two opposing torsion means 21, so in particular the jaws of a Torsionszange, the second holding device 3 and the Torsionskopfes is taken in a downwardly open opening 22.
  • the torsion means 21 can thus be placed at any point on the workpiece 1 and removed from this again.
  • the workpiece 1 With the two torsion means 21, the workpiece 1 can be fixed and rotated at a desired angle to initiate a torque about its longitudinal axis.
  • the Fig. 1 are indicated with the double arrow 20, the directions of rotation, with which the workpiece 1 can be rotated about its longitudinal axis.
  • the measuring device 4 is firmly connected to the second holding device 3.
  • the measuring device 4 could also be mounted separately from the second holding device 3 on the table 8 or else on a suitable stable device. If the workpiece 1 is directed, the final measurement is carried out with the measuring device 4. Subsequently, the workpiece 1 is removed from the directional mesh, which is then ready for another straightening process. As can be seen, the workpiece 1 to be straightened for the straightening process from beginning to end must not be re-clamped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Claims (17)

  1. Un procédé pour le redressement de torsion automatique des pièces à usiner allongées (1) dans une machine de redressement de torsion (23) avec deux dispositifs de maintien (2, 3) pour introduire un couple dans la pièce à usiner (1), où les deux dispositifs de maintien (2, 3) sont arrangés face à face à une distance, et avec un dispositif de mesure (4) pour mesurer la pièce à usiner (1), où le dispositif de mesure (4) et la pièce à usiner (1) sont déplacés l'un par rapport à l'autre, caractérisé en ce que la pièce à usiner (1) est mesuré au moins une fois de façon continue entre ses deux extrémités dans la machine de redressement de torsion (23) et chaque fois, sur la base de ladite mesure, une courbe est enregistré, qui représente l'inclinaison ou la torsion à la position correspondante de la pièce à usiner, et en ce que la pièce à usiner (1) est soumis à une étape de redressage ultérieur dans la machine de redressement de torsion (23) au moins une fois par l'introduction d'un couple.
  2. Le procédé selon la revendication 1, caractérisé en ce que la pièce à usiner (1) est mesuré dans des distances de 20 mm ou moins, de préférence 10 mm ou moins, pendant la mesure en continu.
  3. Le procédé selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le dispositif de mesure (4) est un dispositif de mesure tactile ou un dispositif de mesure optique et en particulier un dispositif de mesure optique de laser.
  4. Le procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif de mesure optique (4) projette une ligne sure un côté supérieur (1a) ou un autre côté de la pièce à usiner (1) lors de la mesure.
  5. Le procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que essentiellement une inclinaison est mesurée en continu sur la pièce à usiner (1).
  6. Le procédé selon la revendication 5, caractérisé en ce que un dispositif d'enregistrement est prévu et en ce que une courbe d'inclinaison est enregistré sur ledit dispositif d'enregistrement après ou pendant le processus de mesure.
  7. Le procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la pièce à usiner (1) est déplacé pendant la mesure.
  8. Le procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'une section de la pièce à usiner (1) est déterminée après une mesure, qui comprend le plus grand besoin de redresser et en ce que ladite section est redressé par la suite avec un couple.
  9. Le procédé selon la revendication 8, caractérisé en ce que le procédé de mesure et l'introduction d'un couple sont effectuées plusieurs fois l'une après l'autre.
  10. Le procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'au moins l'un des dispositifs de maintien (3) forme une tête de torsion.
  11. Le procédé selon la revendication 1, caractérisé en ce que le deuxième dispositif de maintien (3) ou la tête de torsion est mobile le long d'une table (8).
  12. Le procédé selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le deuxième dispositif de maintien (3) ou la tête de torsion comprend une ouverture (22) qui est ouvert vers l'extérieur, de sorte que le dispositif de fixation peut être posé sur la pièce à usiner à un endroit quelconque de l'extérieur.
  13. Le procédé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que le procédé de mesure et le procédé de dressage sont conduits séparément.
  14. Le procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce que le premier dispositif de maintien (2) comprend un piston de redressement (18) et un support de redressement (18) entre lesquelles la pièce à usiner (1) peut être fixée pour le redressage.
  15. Le procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce qu'un résultat de redressement est mesurée et enregistrée par le dispositif de mesure (4).
  16. Le procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce qu'au moins une correction de torsion ainsi qu'une correction de courbure sont effectuées dans la même machine de redressement (23).
  17. Le procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce qu'une ou plusieurs sections ayant des besoins de redressement sont détectées et calculées pendant au moins un procédé de mesure.
EP11405290.5A 2011-07-20 2011-07-20 Procédé pour le dressage automatique de pièces allongées par torsion Active EP2548668B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11405290.5A EP2548668B1 (fr) 2011-07-20 2011-07-20 Procédé pour le dressage automatique de pièces allongées par torsion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11405290.5A EP2548668B1 (fr) 2011-07-20 2011-07-20 Procédé pour le dressage automatique de pièces allongées par torsion

Publications (2)

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EP2548668A1 EP2548668A1 (fr) 2013-01-23
EP2548668B1 true EP2548668B1 (fr) 2016-01-20

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104384273B (zh) * 2014-11-17 2016-02-17 汝州郑铁三佳道岔有限公司 一种钢轨用夹紧扭弯装置
CN104384272B (zh) * 2014-11-17 2016-02-17 汝州郑铁三佳道岔有限公司 一种钢轨用带平台的扭弯夹紧装置
CN108421853A (zh) * 2018-05-18 2018-08-21 浙江亚磊型钢冷拔有限公司 一种异型钢校扭机
DE102019114112B4 (de) 2019-05-27 2021-09-30 Grimm AG Richtpresse und Verfahren zum Biegerichten von länglichen Werkstücken
DE102022210294A1 (de) 2022-09-28 2024-03-28 Felsomat Gmbh & Co. Kg Verfahren und Messstation zum Bestimmen der Geradheit von Stableitern

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH511074A (de) * 1969-07-16 1971-08-15 Ver Drahtwerke Ag Verfahren zum Torsionsrichten eines Profilstabes und Einrichtung zur Durchführung des Verfahrens
DE3735015A1 (de) * 1987-06-11 1988-12-22 Dunkes S Maschinen Richtpresse
DE4007489A1 (de) * 1990-03-09 1991-09-12 Hoesch Ag Richtpresse
EP2331272B1 (fr) * 2008-08-25 2022-01-12 Monteferro S.p.A. Ligne de production de guides d'ascenseur et de produits similaires et procédé de production pour la fabrication de ceux-ci

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