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EP1214990B1 - Machine et méthode de dressage des pièces longues de petite section transversale - Google Patents

Machine et méthode de dressage des pièces longues de petite section transversale Download PDF

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Publication number
EP1214990B1
EP1214990B1 EP20010201470 EP01201470A EP1214990B1 EP 1214990 B1 EP1214990 B1 EP 1214990B1 EP 20010201470 EP20010201470 EP 20010201470 EP 01201470 A EP01201470 A EP 01201470A EP 1214990 B1 EP1214990 B1 EP 1214990B1
Authority
EP
European Patent Office
Prior art keywords
piece
straightening
mentioned
machine
clamps
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.)
Expired - Lifetime
Application number
EP20010201470
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German (de)
English (en)
Other versions
EP1214990A3 (fr
EP1214990A2 (fr
Inventor
Luigi Galdabini
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
Cesare Galdabini SpA
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Application filed by Cesare Galdabini SpA filed Critical Cesare Galdabini SpA
Publication of EP1214990A2 publication Critical patent/EP1214990A2/fr
Publication of EP1214990A3 publication Critical patent/EP1214990A3/fr
Application granted granted Critical
Publication of EP1214990B1 publication Critical patent/EP1214990B1/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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments

Definitions

  • the object of this invention is a machine as well as a process performed by using said machine, destined for straightening pieces of small cross section and great length.
  • Typical examples of pieces of small cross section and great length are profiles of an l, C, I or T shape and of a square, rectangular or any other form of a size up to 100 mm and length up to 10 meters.
  • the profiles have an initial deformation of a flexing or twisting type derived from the fabricating process, such as for instance produced by the internal tensions, which are induced by the heat treating process of quenching, which must be eliminated before being rectified.
  • the straightening is carried out by applying a flexing or twisting moment to the piece, so as to produce a plastic deformation and the ensuing tensions sufficient to compensate those present in the piece.
  • the required straightening tolerances are typically in the order of 0.1 mm/meter, so as to minimize the material to be removed in the subsequent rectifying operation.
  • the process is carried out by alternating measuring phases with straightening phases commensurate with the measured errors.
  • the machine utilized to this date comprises a mechanical structure constituted by a mobile bench and a cross beam, an error measuring and controlling system and some appropriate equipment.
  • the equipment consists of a series of supports and punches in a number adequate for the required type of deformations of the piece to be straightened, mounted respectively on the base and on the cross beam and appropriately installed based on the measured deformations, so as to produce, by the motion of the cross beam, the deformations required by the straightening process.
  • the pieces are first straightened on one side and then rotated to the other.
  • a bending and straightening machine is provided for long material to be straightened and has straightening abutments which are arranged at a distance from one another in the longitudinal direction of the material to be straightened and between which are arranged straightening rams.
  • the purpose of this invention is therefore to implement a machine and a straightening process capable of solving the mentioned problems.
  • Another purpose of the invention is to produce a machine for a simple and inexpensive straightening process, capable of operating in a fast, effective and precise manner.
  • the further object of the invention is a process for straightening pieces of small cross section and great length.
  • the machine 10 consists essentially of a feeding and advancing system for the piece, a system for applying the force, and a system for measuring and controlling the process.
  • the machine 10 offers a feeding system for the pieces 11 to be straightened, constituted by a pair of mobile clamps 12 and 13.
  • a supporting roller 14, 15 and a probe 17, 18 is provided next to each clamp, so as to operate as a measuring device, in combination with a third probe 22 set up along the axis of the punch.
  • the clamps 12, 13, are always moving symmetrically in relation with the axis of the machine, thanks to a servomotor and a toothed belt 16, on which the clamps 12, 13 are respectively engaged with the parts 12', 13' and the respective probes 17, 18 move together with said servomotor and said belt 16.
  • Each of the supports 14, 15 carries an optical sensor unit 20, 21 which forms a sensing barrier and is designed to detect the presence of the piece 11 to be straightened.
  • the piece 11 to be straightened is initially positioned with one of its extremities inside the sensor barrier, as shown in Figure 1.
  • the supports are slightly shifted toward the outside, so that the extremity of the piece 11 is positioned halfway across the support 12.
  • the piece 11 is moved to such a position as to reach the second clamp 13, as shown for exampie in Figure 2; this position is subsequently recorded as a zero position, by using the optical sensor unit 18 of the second clamp 13.
  • the piece 11 is held in position by the two clamps 12, 13, while the first extremity of the piece 11 is kept at a predetermined distance from the optical sensor unit.
  • This motion is achieved as follows: opening of the clamp 13, shifting of the clamps 12, 13 toward the center of the machine 10, closing of the clamp 13, opening of the clamp 12, shifting of the clamps 12, 13 in an opposite direction, and closing of the clamp 12.
  • the procedure described above may be repeated as often as required, until reaching the final section to be straightened.
  • the piece is first straightened along one plane, for all the sections involved and by the process described above, and then rotated by 90° so as to be further straightened in all the sections along the second straightening plane.
  • the stroke length of the punch is commensurate with the error measured.
  • the process also takes care of measuring the deformation of the profile section under work, the calculation of the stroke for the punch, the application of the deforming force, a new measurement of the deformation of the piece, and the eventual repetition of the cycle until reaching the desired tolerances.
  • the punch may apply the deforming force in either a pushing or pulling mode, depending on the curvature of the piece.
  • the machine according to the invention makes it possible to achieve the stepwise straightening of the piece, while preventing a simultaneous straightening along the entire length of the piece 11.
  • the materials, the shapes and sizes of the details illustrated may be of any kind, depending on the requirements, and the same may easily be replaced with others of a technically equivalent type.

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

Claims (13)

  1. Machine (10) servant au redressement de pièces (11) de petite section et de grande longueur, d'un type comprenant des moyens de support d'une pièce à redresser, associés à un système pour appliquer la force comportant un mandrin (19), et à un système servant à mesurer et à commander le processus, comprenant, de plus, un système d'alimentation et d'avance de ladite pièce (11), caractérisée en ce que le système d'alimentation mentionné pour les pièces (11) à redresser est muni de deux pinces mobiles (12, 13) opérant sur ladite pièce (11) à redresser, de façon à la déplacer vers les positions de traitement suivantes, chacune des pinces mentionnées (12, 13) pouvant se déplacer symétriquement par rapport à un axe de la machine et en ce que ledit mandrin (19) est placé entre les deux pinces mobiles (12, 13) et est capable de soumettre ladite pièce (11) à un mouvement de flexion, soit dans un mode de poussée, soit dans un mode de traction.
  2. Machine (10) selon la revendication 1, caractérisée en ce que près de chacune des pinces mentionnées (12, 13) est associé un cylindre de support (14, 15) et un capteur (17, 18) agissant comme un dispositif de mesure en combinaison avec un troisième capteur (22).
  3. Machine (10) selon les revendications 1 ou 2, caractérisée en ce que chacune des pinces mentionnées (12, 13) se déplace symétriquement par rapport à un axe de la machine en utilisant un servomoteur et une courroie dentée (16).
  4. Machine (10) selon la revendication 2 ou 3, caractérisée en ce que chacun des capteurs (14, 15) se déplace de la même manière que les pinces mentionnées (12, 13).
  5. Machine (10) selon l'une des revendications précédentes, caractérisée en ce que chacune des pinces mentionnées (12, 13) supporte une unité de capteur optique (17, 18) qui sert à détecter la présence de la pièce (11) à redresser.
  6. Machine (10) selon l'une des revendications précédentes, caractérisée en ce qu'elle est munie d'un système servant à mesurer la déformation de la pièce, pour proportionner, à la déviation mesurée, la longueur de course du mandrin (19), capable de soumettre ladite pièce (11) à un mouvement de flexion, jusqu'au point de produire une contrainte suffisante pour déformer de façon permanente une partie du matériau.
  7. Procédé de redressement de pièces de petite section transversale et de grande longueur, comprenant une première phase dans laquelle la pièce (11) à redresser est déplacée d'une position initiale en utilisant des première et seconde pinces mobiles (12, 13) jusqu'à une position de référence dans laquelle ladite pièce (11) atteint la seconde pince (13), et dans laquelle la pièce (11) est maintenue en position par les pinces mentionnées (12, 13) de façon à exécuter une première phase de redressement correspondant à une première section de la pièce (11) au moyen d'un système servant à appliquer la force comprenant un mandrin (19), placé entre les deux pinces mobiles (12, 13) et capable de soumettre ladite pièce (11) à un mouvement de flexion, soit en mode de poussée, soit en mode de traction, une phase consistant à faire avancer la pièce mentionnée d'une demi section environ afin d'exécuter une seconde phase de redressement d'une seconde section de la pièce (11), par quoi les phases mentionnées de redressement d'une section et de progression de la pièce mentionnée (11) sont répétées un nombre de fois nécessaire jusqu'à ce que toutes les sections de la pièce (11) soient redressées, le mouvement de progression de la pièce mentionnée (11) étant exécuté par l'ouverture d'une première pince (13), par le déplacement des deux pinces (12, 13) vers le centre de ladite machine (10), par la fermeture de la première pince mentionnée (13), l'ouverture d'une seconde pince (12), le déplacement des pinces mentionnées (12, 13) dans un sens inverse et la fermeture de la seconde pince mentionnée (12).
  8. Procédé de redressement de pièces selon la revendication 7, caractérisé en ce que la pièce (11), chaque fois qu'une pièce quelconque présente deux différents plans de redressement, est d'abord redressée suivant un premier plan dans toutes les sections à redresser et est ensuite tournée de 90 degrés afin d'être également redressée sur toutes les sections du second plan de redressement.
  9. Procédé de redressement de pièces selon la revendication 7, caractérisé en ce que la longueur des étapes individuelles est programmable.
  10. Procédé de redressement de pièces selon la revendication 7, caractérisé en ce que la course du mandrin est proportionnée à la déviation mesurée.
  11. Procédé de redressement de pièces selon la revendication 7, caractérisé en ce qu'il est prévu de mesurer la déformation de la section de profil à traiter, calculer la course du mandrin, appliquer la force de déformation, mesurer à nouveau la déformation de la pièce, et répéter éventuellement le cycle jusqu'à l'obtention des tolérances souhaitées.
  12. Procédé de redressement de pièces selon la revendication 11, caractérisé en ce que le mandrin peut appliquer la force de déformation, soit en mode de poussée, soit en mode de traction, en fonction de la courbure de la pièce.
  13. Procédé de redressement de pièces selon la revendication 12, caractérisé en ce que, dans le but de minimiser la déformation globale de la pièce, les tolérances de redressement des sections adjacentes prévoient des courbures résiduelles dans des sens opposés.
EP20010201470 2000-12-15 2001-04-23 Machine et méthode de dressage des pièces longues de petite section transversale Expired - Lifetime EP1214990B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI202720 2000-12-15
ITMI20002720 2000-12-15
IT2000MI002720 IT1319553B1 (it) 2000-12-15 2000-12-15 Macchina e procedimento per la raddrizzatura di pezzi di piccolasezione ed elevata lunghezza

Publications (3)

Publication Number Publication Date
EP1214990A2 EP1214990A2 (fr) 2002-06-19
EP1214990A3 EP1214990A3 (fr) 2003-10-29
EP1214990B1 true EP1214990B1 (fr) 2005-07-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010201470 Expired - Lifetime EP1214990B1 (fr) 2000-12-15 2001-04-23 Machine et méthode de dressage des pièces longues de petite section transversale

Country Status (3)

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EP (1) EP1214990B1 (fr)
DE (1) DE60112026T2 (fr)
IT (1) IT1319553B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756018A (zh) * 2012-07-19 2012-10-31 张家港华东锅炉有限公司 单支鳍片换热管旁弯校正装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2873601B1 (fr) * 2004-07-29 2007-12-28 D Equipement De Modernisation Machine a redresser les fers
WO2010023563A2 (fr) * 2008-08-25 2010-03-04 Monteferro S.P.A. Chaîne de production de guides de levage et de produits similaires et procédé de production pour la fabrication de ceux-ci
JP5782877B2 (ja) * 2011-07-11 2015-09-24 Ｊｆｅスチール株式会社 曲げ癖矯正方法、該曲げ癖矯正方法を用いた断面溝形形状を有する部材の成形方法
CN104338804A (zh) * 2014-10-29 2015-02-11 倪荣琴 可移动式校直机
CN105537324B (zh) * 2014-10-30 2017-09-22 五冶集团上海有限公司 球团双层滚筛筛辊矫直装置及其使用方法
CN107529459B (zh) * 2017-10-10 2019-04-12 芜湖美奥机械科技有限公司 一种空调压缩机主壳体辅助制备机
CN112872109B (zh) * 2021-02-04 2023-05-16 浙江久立特材科技股份有限公司 一种异型管材的整形装置
CN113059029A (zh) * 2021-03-12 2021-07-02 重庆市永川区中川科技发展有限责任公司 用于长直轴的矫直机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE903396C (de) * 1951-09-07 1954-02-04 Esco Sa Mechanique Generale De Verfahren und Vorrichtung zum Richten drahtartigen Werkstoffes auf einer selbsttaetign Drehbank
DE1141160B (de) * 1956-05-08 1962-12-13 Aerofin Corp Rohrrichtmaschine
DE2328111A1 (de) * 1973-06-01 1974-12-19 Hans Lindemann Richtmaschine fuer strangfoermige werkstuecke
DE3927465A1 (de) * 1989-08-19 1991-02-21 Mae Maschinen U Apparatebau Go Biegerichtmaschine fuer langgestrecktes richtgut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756018A (zh) * 2012-07-19 2012-10-31 张家港华东锅炉有限公司 单支鳍片换热管旁弯校正装置

Also Published As

Publication number Publication date
EP1214990A3 (fr) 2003-10-29
EP1214990A2 (fr) 2002-06-19
DE60112026D1 (de) 2005-08-25
DE60112026T2 (de) 2006-05-18
ITMI20002720A1 (it) 2002-06-15
IT1319553B1 (it) 2003-10-20

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