EP3651918B1 - Procédé destiné à la correction par redressage automatique d'éléments métalliques allongés et appareil de redressage destiné auxdits éléments - Google Patents

Procédé destiné à la correction par redressage automatique d'éléments métalliques allongés et appareil de redressage destiné auxdits éléments Download PDF

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Publication number
EP3651918B1
EP3651918B1 EP18749883.7A EP18749883A EP3651918B1 EP 3651918 B1 EP3651918 B1 EP 3651918B1 EP 18749883 A EP18749883 A EP 18749883A EP 3651918 B1 EP3651918 B1 EP 3651918B1
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EP
European Patent Office
Prior art keywords
supply line
detection
straightening
along
detecting
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EP18749883.7A
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German (de)
English (en)
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EP3651918A1 (fr
Inventor
Fabio BALDONI
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Schnell SpA
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Schnell SpA
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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
    • 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
    • B21D3/02—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 by rollers
    • B21D3/05—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 by rollers arranged on axes rectangular to the path of the work
    • 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
    • B21D3/02—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 by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening
    • B21F1/026—Straightening and cutting

Definitions

  • the present invention relates to a method for automatic straightening correction of elongated metal elements, in particular metal profiles and rods and similar products, as well as a straightening apparatus for said elements.
  • Apparatuses for elongated metal elements machining are known, in particular metal profiles and similar products, which comprise straightening groups.
  • these groups are used to carry out the straightening of rods wounded in rolls which, once unwrapped and straightened, can in any case have a more or less marked residual curvature, unsuited for subsequent machining operations or for direct use.
  • the aforementioned apparatuses may comprise, for example, straightening groups made by means of a plurality of counter-rotating wheels pairs, through which the rod is supplied, in order to undergo cyclical bending yield actions, aimed at eliminating the residual curvature.
  • the two rods simultaneously undergoing straightening may have different residual curvatures, as well as conformation differences, whose effects on the straightening results are made visible to the operators only after the first cycle or the first straightening cycles, making specific corrections necessary.
  • the first straightening cycle or the first straightening cycles are useful for operators to detect deviations from the desired straightening result, for each rod, and, therefore, to identify the corrections to be made.
  • the straightening apparatuses of the known type may provide for totally or partially separated straightening groups, therefore able to differentiate the straightening parameters for each rod.
  • the Applicant's application WO2016/063256 shows a magneto-resistive sensor, suitable for detecting the barycentre position of the metal element section, on a detection plane.
  • the specific field needs to detect the current position, thereby the possible distortion from the straighten condition, of a section of the element to be straightened, not only on a straightening line, but on two flanked lines.
  • the object of the present invention is to solve the aforementioned problems by devising a method for automatic straightening correction of elongated metal elements, in particular of at least one pair of metal elements to be machined also simultaneously, and an apparatus for the automatic straightening of the same elements, suitable for implementing this method.
  • Another object of the present invention is to provide an apparatus for the automatic straightening of at least a pair of elongated metal elements, of simple constructional and functional conception, provided with safe and reliable use, as well as a relatively economic cost.
  • a detection group in the apparatus according to the invention arranged downstream of the straightening unit, it is indeed possible to detect instantaneous data sufficient to reliably process the straightened configuration of a first element straightened along a first supplying line and then, separately, of a second element straightened along a second supply line flanked to the first supply line, in order to separately determine the parameters of the possible correction to be made to the respective straightening members.
  • the detection group can separately and effectively detect the straightening result on each straightening line. Thanks to this detection it is then possible to adjust the straightening on each line and, finally, proceed with the metal profiles machining on one single line or on both.
  • the effects of the adjustment operation carried out by means of the detection group according to the invention remain substantially stable for long sections of the same machined profile, for each supply line provided.
  • the detected data and the corrections processed in an initial phase can then be used simultaneously if the at least one pair of elements are machined simultaneously along the respective supply lines.
  • the respective corrections can be made separately on each supply line.
  • each of the supply flanked lines may be supplied subsequently, thus machining one element after another, separately.
  • the detection group comprises a plurality of sensor devices, arranged subsequently along the supply lines at the worktop.
  • At least one sensor device comprises a magneto-resistive sensor-type member, in particular according to what is illustrated in the application WO2016/063256 of the Applicant, here integrally incorporated.
  • the detection group is movable of an approach motion, to approach the sensor devices to the farthest supply line from the worktop.
  • the sensor devices can be alternatively movable between a position aligned with the worktop and a position protruding from it.
  • the apparatus 1 is suitable for the simultaneous machining of a first element 2a and a second element 2b.
  • the first element 2a is suitable to be supplied at an apparatus worktop 3, for example substantially vertical or inclined with respect to a vertical plane, along a first supply line A.
  • the second element 2b is suitable to be supplied at the same worktop 3 along a second supply line B, substantially parallel and flanked to the first supply line A with respect to a transverse direction, in particular orthogonal, to the worktop 3.
  • the second supply line B is arranged in a more displaced position from the worktop 3, with respect to the first supply line A.
  • first element 2a and the second element 2b are brought forward through a straightening unit 4.
  • This straightening unit 4 can comprise a single group of counter-rotating wheels, able to carry out the straightening of the elements 2a, 2b.
  • Towing means may be provided along the respective supply lines A, B, in a different way with respect to the straightening unit 4, for the elements 2a, 2b advancement or integrated therein.
  • the straightening unit 4 can be of any type, for example rotors, hyperbolic rotors or mixed types.
  • the apparatus 1 is used in a stirrup bending machine, suitable for making pieces of bracket type, by the subsequent folding of the elements 2a, 2b.
  • the method and the apparatus according to the invention can be used in machines of other type besides straightening machines, for example, shaping machines.
  • the device 1 comprises, in the case shown by way of example, a bending head 5 arranged downstream of the straightening unit 4.
  • the bending head 5 operating on the worktop 3 comprises a central spindle 6 around which a folding pin 7 is rotatable.
  • a cutting group 8 is provided, provided with a pair of opposite blades, movable relatively to each other, to precisely cut elements 2a, 2b.
  • a detection group 10 is provided suitable for detecting useful parameters for automatically correcting the straightening to be carried out, on elements 2a, 2b, in particular by detecting the possible deviation of each straightened element from a desired straightening configuration, for the same element, in order to allow the respective correction parameters processing.
  • the detection group 10 comprises at least one sensor device 11, preferably a plurality of sensor devices 11 subsequently arranged along supply lines A, B, in order to detect the position of a section of the elements 2a, 2b at respective detection planes.
  • each sensor device 11 has the function of detecting the position of respective sections of elements 2a, 2b which pass through the respective detection plane, when the aforementioned elements 2a, 2b are brought forward along the respective supply lines A, B.
  • each sensor device 11 is suitable for detecting at least at a moment the instantaneous position of a section, for example, of the first element 2a, during supply phase through at least one transverse detection plane to the respective supply line A, B.
  • associated processing means can process, based on the instantaneous position detected in the aforementioned successive moments, the configuration actually acquired by the supplied and straightened element along the respective supply line.
  • elements 2a, 2b moreover generally ribbed, hence with a discontinuous conformation, undergo more or less extensive oscillations.
  • Each sensor device 11 then operates, for each element 2a, 2b, the instantaneous position detection of subsequent moving sections, hence of a respective sufficiently extended section, for evaluating, for example on the basis of statistical calculations, the magnitude of such oscillations and in any case to return a processing of the correspondent straightened configuration taken, which the observed element would take in a static condition.
  • each sensor device 11 is carried out during the advancement phase of the elements 2a, 2b, but is suitable for returning as a result the straightened configuration processing of the same elements 2a, 2b, as if the observation was performed in a static condition.
  • the processing means of the device 1 are then suitable for processing the possible deviation from a desired straightened configuration of the observed element.
  • the detection group 10 can advantageously comprise at least one, preferably three, sensor devices 11, suitable for detecting the respective sections position subsequent of the same element 2a, 2b and thus allowing processing, preferably by means of an associated processing unit of the aforementioned straightened configuration, actually taken by the observed element 2a, 2b.
  • the carried out correction may comprise an appropriate variation of the reciprocal position of some of the operating members of the straightening unit, for example of the straightening wheels, if provided, or of the straightening inserts of the rotors, if provided.
  • first element 2a and the second element 2b are independently brought forward through the straightening unit 4, in order to be able to alternately advance the first element 2a or the second element 2b during the detection phase or both, for example, during the production phase.
  • the sensor devices 11 can read the position of respective sections of a single element at a time, distinctly deriving the respective parameters of a possible, probable correction.
  • the sensor devices 11 are of the type described in the application WO2016/063256 of the Applicant. This type of sensor is suitable for detecting the barycentre position of a section of the observed element 2a or 2b, at the respective detection plane.
  • the magneto-resistive type sensor can be usefully protected by means, for example a metal sheet, of non-magnetic material.
  • Another sensor type may be used, provided that it is suitable for detecting the instantaneous position of a section of the observed element 2a, 2b.
  • the sensor devices 11 may be movable according to an approach motion to the elements 2a, 2b to be observed.
  • At least one sensor device 11 is movable of the aforementioned approach motion according to the aforementioned transverse direction, in particular orthogonal, to the worktop 3, between a first operating position 11', substantially operative on the worktop 3, for the detection along the first supply line A, approached to the plane itself, and a second operating position 11", protruding from the worktop 3, for the detection along the second supply line B, displaced from the plane itself.
  • At least one mobile sensor device 11 of the aforementioned approach motion is protected by a respective protective casing conforming a front slide 12, inclined in order to gradually protrude according to the supply direction A, B, to facilitate the sliding of the element to be observed on the worktop 3 and to prevent the same elements 2a, 2b being obstructed during the respective advancement motion.
  • each one of the three sensor devices 11 provided has its own protective casing conforming a respective slide 12.
  • the method for automatic straightening correction for elongated metal elements is easily comprehensible from the preceding disclosure.
  • the same straightening unit 4 carries out at the same time the straightening of the same first element 2a.
  • the straightened element 2a advances beyond the bending head 5, if provided, thus reaching the detection group 10.
  • the sensor devices 11, arranged in the respective detection position, may then perform the detection of the respective observed sections. Based on these measurements, the possible correction to be made on the straightening members operating on the first supply line A may be determined.
  • the advancement of the first element 2a along the first advancement line A is then stopped.
  • cutting and removal of the first element 2a, already detected, from worktop 3, is carried out, or alternatively, the rewinding is carried out by means of the retraction of the same first element 2a.
  • the first element 2a is removed from the detection space interposed between the sensor devices 11 and the second element 2b, still to be observed and the operation may be repeated for subsequent iterations, until the desired degree of straightening is achieved.
  • the second element 2b is then inserted into device 1 or brought forward if already inserted. In any case, it is brought forward along the second advancement line B, in the sensor devices 11 operation area which, without the first element 2a, may be advantageously arranged in the second operating position 11" protruding from the worktop 3 and approached to the second supply direction B.
  • the sensor devices 11 may then detect the sections position of the second element 2b observed, which pass through the respective detection planes. More precisely, the displacement of the sensor devices 11 in the second operating position 11" also moves their radius of action near the element 2b, facilitating detection by the same sensor devices 11.
  • the straightened configuration of the second element 2b can be processed by the aforementioned processing unit, in order to obtain the correction data required to obtain the straightened configuration with the desired tolerance.
  • the sensor devices 110 may be movable according to the aforementioned approach motion, between the first operating position 110', on the worktop 3, and the second operating position 110", approached to the second supply line B.
  • the detection group 10 described by a way of example, is susceptible of several modifications and variations depending on different requirements.
  • the materials used, as well as shape and dimensions, may be any according to requirements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)

Claims (10)

  1. Procédé de correction automatique de redressement d'éléments métalliques allongés, en particulier de tiges métalliques, comprenant la phase consistant à :
    a. fournir un premier élément (2a) le long d'une première ligne d'alimentation (A) sur un plan de travail (3), à travers une unité de redressement (4) agissant le long de ladite première ligne d'alimentation (A), réalisant ainsi le redressement dudit premier élément (2a), caractérisé en ce qu'il comprend les autres phases consistant à :
    b. détecter au moyen d'un groupe de détection (10, 100) disposé en aval de ladite unité de redressement (4) et apte à détecter au moins au niveau d'un plan de détection transversal à ladite première ligne d'alimentation (A) la position instantanée de sections dudit premier élément (2a) se déplaçant dans ladite phase d'alimentation, afin de traiter par l'intermédiaire de moyens de traitement la configuration réellement prise par ledit premier élément (2a) fourni et redressé le long de ladite première ligne d'alimentation (A) ;
    c. régler, à tout moment après ladite phase de détection b.), ladite unité de redressement (4) en fonction d'une déviation possible de ladite configuration réellement prise, traitée pour ledit premier élément redressé (2a), par une configuration redressée souhaitée ;
    d. suspendre la fourniture dudit premier élément (2a) ;
    e. fournir à travers ladite unité de redressement (4) un second élément (2b) le long d'une seconde ligne d'alimentation (B) disposée sur le côté, par rapport à une direction transversale audit plan de travail (3), de ladite première ligne d'alimentation (A) d'une manière sensiblement parallèle, réalisant ainsi le redressement dudit second élément (2b) ;
    f. détecter au moyen dudit groupe de détection (10, 100) apte à détecter au moins, au niveau d'un plan transversal de détection respectif à ladite seconde ligne d'alimentation (B), la position instantanée de sections dudit second élément (2a) se déplaçant pendant ladite phase d'alimentation, afin de traiter par l'intermédiaire de moyens de traitement une configuration respective réellement prise par ledit second élément (2b) fourni et redressé le long de ladite seconde ligne d'alimentation (B) ;
    g. régler, à tout moment après ladite phase de détection f.), ladite unité de redressement (4) en fonction d'un déplacement respectif possible de ladite configuration respective réellement prise, traitée pour ledit second élément redressé (2b), par une configuration redressée souhaitée respective ;
    h. reprendre la fourniture dudit premier élément (2a) et/ou dudit second élément (2b), respectivement, le long de ladite première ligne d'alimentation (A) et/ou de ladite seconde ligne d'alimentation (B), pour poursuivre le redressement et/ou effectuer l'usinage ultérieur.
  2. Procédé selon la revendication 1, caractérisé en ce que lesdites phases de b.) détection et c.) réglage et/ou lesdites phases de f.) détection et g.) réglage sont respectivement répétées une ou plusieurs fois pour réduire progressivement ledit déplacement entre ladite configuration traitée réellement prise et ladite configuration redressée souhaitée et/ou atténuer l'effet d'oscillations possibles dudit premier et/ou second élément (2a, 2b), respectivement, pendant ladite phase d'alimentation a.) et/ou e.).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que ladite phase de d. suspension de la fourniture dudit premier élément (2a) permet d'enlever, au moins partiellement, ledit premier élément (2a) dudit plan de travail (3), au moyen d'un cisaillement ou d'un retrait le long de ladite première ligne d'alimentation (A).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que ladite phase de f.) détection au moyen dudit groupe de détection (10, 100) de la position instantanée de sections dudit second élément (2a) est précédée de la phase de
    e1.) déclenchement dudit groupe de détection (10, 100) selon un mouvement d'approche le long de ladite direction transversale, d'une première position de fonctionnement (11') sur le plan de travail (3), au niveau de laquelle ledit groupe de détection (10, 100) est apte à effectuer la détection de ladite position instantanée de sections dudit premier élément (2a) le long de ladite première ligne d'alimentation (A), jusqu'à une seconde position de fonctionnement (11", 110"), faisant saillie à partir dudit plan de travail (3), au niveau de laquelle ledit groupe de détection (10, 100) est approché de ladite seconde ligne d'alimentation (B), pour effectuer la détection de ladite position instantanée de sections dudit second élément (2b).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que lesdites phases de détection b. et f. se produisent au moyen d'une pluralité de dispositifs de détection (11) dudit groupe de détection (10, 100), agencés consécutivement le long de ladite première ligne d'alimentation (A) et de ladite seconde ligne d'alimentation (B) et aptes à détecter la position instantanée de sections mobiles dudit premier élément (2a) et dudit second élément (2b) au niveau de plans de détection respectifs.
  6. Appareil pour le redressement automatique d'éléments métalliques allongés, comprenant une unité de redressement (4) apte à effectuer le redressement d'au moins un premier élément (2a) et un second élément (2b) le long, respectivement, d'une première ligne d'alimentation (A) et d'une seconde ligne d'alimentation (B), agencées sensiblement de manière parallèle à un plan de travail (3) et disposées l'une à coté de l'autre par rapport à une direction transversale audit plan de travail (3), en particulier orthogonale, caractérisé en ce que, en aval de ladite unité de redressement (4), il comprend un groupe de détection (10, 100) apte à détecter la position instantanée de sections mobiles dudit premier élément (2a) et dudit second élément (2b) au moins au niveau d'un plan de détection transversal à ladite première ligne d'alimentation (A) et à ladite seconde ligne d'alimentation (B), des moyens de traitement pour traiter la configuration redressée réellement prise, dudit premier élément (2a) et/ou dudit second élément (2b), ledit groupe de détection (10, 100) étant mobile d'un mouvement d'approche selon ladite direction transversale entre une première position de fonctionnement (11', 110') sur ledit plan de travail (3), au niveau de laquelle ledit groupe de détection (10, 100) est apte à actionner la détection de ladite position instantanée pour ledit premier élément (2a) le long de ladite première ligne d'alimentation (A), et une seconde position de fonctionnement (11", 110"), faisant saillie dudit plan de travail (3), au niveau de laquelle ledit groupe de détection (10, 100) s'approche de ladite seconde ligne d'alimentation (B), pour effectuer la détection de ladite position instantanée pour ledit second élément (2b).
  7. Appareil selon la revendication 6, caractérisé en ce que ledit groupe de détection (10, 100) est protégé par un boîtier de protection se conformant à un coulisseau respectif (12, 120), incliné de manière à faire saillie progressivement selon une direction d'avance le long de ladite seconde ligne d'alimentation (B), pour faciliter l'avancement le long de ladite seconde ligne d'alimentation (B) dudit second élément (2b) lorsque ledit groupe de détection (10, 100) est dans ladite seconde position de fonctionnement (11", 110").
  8. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit groupe de détection (10, 100) comprend au moins un dispositif de détection magnétorésistif (11) protégé au moyen d'un matériau non magnétique.
  9. Appareil selon l'une des revendications précédentes, caractérisé en ce que ladite unité de redressement (4) comprend des moyens d'avancement indépendants pour ledit premier élément (2a) et pour ledit second élément (2b), afin de permettre l'avancement ou la rétraction indépendants dudit premier élément (2a) et/ou dudit second élément (2b), pour permettre, en particulier, la détection séparée desdites configurations redressées respectives détectées.
  10. Appareil selon l'une des revendications précédentes, caractérisé en ce que ledit groupe de détection (10, 100) comprend une pluralité de dispositifs de détection (11) agencés consécutivement le long de ladite première ligne d'alimentation (A) et de ladite seconde ligne d'alimentation (B) et aptes à détecter la position instantanée de sections mobiles dudit premier élément (2a) et dudit second élément (2b) au niveau de plans de détection respectifs.
EP18749883.7A 2017-07-13 2018-07-11 Procédé destiné à la correction par redressage automatique d'éléments métalliques allongés et appareil de redressage destiné auxdits éléments Active EP3651918B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000079221A IT201700079221A1 (it) 2017-07-13 2017-07-13 Metodo per la correzione automatica della raddrizzatura di elementi metallici di foggia allungata e apparecchiatura per la raddrizzatura di tali elementi
PCT/IT2018/050130 WO2019012569A1 (fr) 2017-07-13 2018-07-11 Procédé destiné à la correction par redressage automatique d'éléments métalliques allongés et appareil de redressage destiné auxdits éléments

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EP3651918A1 EP3651918A1 (fr) 2020-05-20
EP3651918B1 true EP3651918B1 (fr) 2022-03-23

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EP (1) EP3651918B1 (fr)
IT (1) IT201700079221A1 (fr)
WO (1) WO2019012569A1 (fr)

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CN111842716A (zh) * 2020-07-15 2020-10-30 华力通线缆股份有限公司 一种用于电阻率测试实验的电缆丝拉直装置
IT202100017426A1 (it) * 2021-07-01 2023-01-01 Schnell Spa Gruppo di rilevamento della curvatura per elementi oblunghi, in particolare metallici

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IT1299943B1 (it) * 1998-03-30 2000-04-04 Schnell Spa Metodo e apparecchiatura per la raddrizzatura di profilati metallici e simili.
ITBO20020604A1 (it) * 2002-09-25 2004-03-26 Schnell Spa Gruppo di correzione finale in apparecchiature per
IT1401850B1 (it) * 2010-10-14 2013-08-28 Schnell Spa Gruppo di traino in macchine per lavorare profilati metallici

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EP3651918A1 (fr) 2020-05-20
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