EP3930938B1 - Procédé de redressement d'éléments métalliques allongés et ensemble redresseur destiné auxdits éléments - Google Patents

Procédé de redressement d'éléments métalliques allongés et ensemble redresseur destiné auxdits éléments Download PDF

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Publication number
EP3930938B1
EP3930938B1 EP20714290.2A EP20714290A EP3930938B1 EP 3930938 B1 EP3930938 B1 EP 3930938B1 EP 20714290 A EP20714290 A EP 20714290A EP 3930938 B1 EP3930938 B1 EP 3930938B1
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EP
European Patent Office
Prior art keywords
roller
straightening
axis
supply line
frame
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EP20714290.2A
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German (de)
English (en)
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EP3930938A1 (fr
Inventor
Simone Rupoli
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Schnell SpA
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Schnell SpA
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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
    • B21D3/02—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
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening
    • 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 straightening elongated metal elements, in particular metal profiles and rods and similar products, as well as a straightener assembly for these elements.
  • Apparatuses for processing elongated metal elements, in particular metal profiles and similar products, which include straightening units are known.
  • these units are used, in particular, to straighten rods wound in rolls which, once unwound and straightened, may still have a more or less accentuated residual curvature, which is unsuitable for subsequent processing or for direct use on site.
  • the aforementioned apparatuses may comprise, for example, straightening units made by means of a plurality of pairs of counter-rotating wheels opposite and staggered which respect to the axis of the wire, through which the rod is fed, so that it is subjected to cyclical actions of yielding by bending, aimed at eliminate its residual curvature.
  • US patent 1,239,175 illustrates, for example, an apparatus for straightening metal wires, comprising a first set of counter-rotating wheels and a second set of counter-rotating wheels, arranged on mutually orthogonal planes.
  • Patent EP 2961543 illustrates a straightening and drawing device comprising a drawing unit capable of drawing a metal wire along an advance direction, provided with a first main motorized roller, having large size and first contrasting rollers of smaller diameter than the first main roller, arranged idly on a part of the periphery of the first motorized roller.
  • the patent also shows a straightening only unit, independent of the aforementioned drawing unit, arranged along the advance direction, upstream of the drawing unit, and comprising a second main roller, assembled idle and having large size, as well as second contrast rollers with a smaller diameter than the second main roller, arranged idly on a part of the periphery of the second main roller.
  • This unit exerts a plastic deformation action on the wire in transit such as to reduce the internal stresses present in the wire.
  • KR 100707912 forming the basis for the preamble of claims 1 and 8, discloses an apparatus for straightening elongated metal elements.
  • US 6,237,383 illustrates a device for unwinding wires by means of a rotating support.
  • Patent application US 2,517,309 discloses an apparatus for straightening metal wires along a feeding line.
  • Patent application DE 2057943 describes a drawing apparatus for continuous elements, such as for example metal wires, for straightening of the same.
  • a straightener assembly comprising a frame having a first roller and a second roller, which may be rotated respectively around a first axis and a second axis mutually parallel, and spaced so that a passage for the aforesaid element is defined between them on a plane orthogonal to said first axis and to said second axis, the frame being movable according to a rotation motion around a rotation axis parallel to said first and to said second axis, between an angular configuration for inserting the element along the feeding line, where the first roller and the second roller are arranged opposite to the feeding line and the passage defined between the first roller and the second roller is aligned to the feeding line for inserting the element, and at least a configuration and straightening angle, where the first roller and the second roller are both at least partially on the same side with respect to the feeding line, so as to arrange the a
  • the aforementioned sinuous path is preferably aligned with said feeding line, both upstream and downstream of said straightening assembly.
  • said first and said second axes are arranged in an adjustable manner on the aforementioned mobile frame.
  • the straightener assembly is positioned first in the insertion angular configuration, by operating the frame manually or by means of a motor member in said rotation motion.
  • the first wheel and the second wheel do not interfere with the straight path of the element corresponding to the feeding line.
  • the metal element is thus easily inserted along the feeding line through the straightener assembly.
  • the element inserted in this manner is engaged, preferably by a drawing assembly associated with the straightener assembly.
  • the straightener assembly is positioned in said angular straightening configuration, operating the support frame of the first and the second rollers in the aforementioned rotation motion.
  • the element is then fed along the feeding line, preferably by means of said drawing assembly, so as to operate at the same time its straightening.
  • the method according to the invention and the straightener assembly that implements it enable a creation of a sinuous path along the feeding direction of the element to be straightened, therefore characterized by a possibly accentuated curvature which is able to ensure an equally accentuated plastic deformation of the material that guarantees an optimal straightening.
  • the mobile frame which may be operated preferably by the motor member, it is possible to adjust the amount of deformation imposed on the metal element to identify the most suitable sinuous path, so as to allow the straightening of any type of elongated metal element.
  • the versatility of the straightener assembly may be ensured by the operation of a single motor member.
  • first roller and the second roller are arranged eccentric with respect to said frame rotation axis, so that the plastic deformation action is even more effective on a wide variety of elements, in terms of size and type.
  • each type of element depending on the transverse dimensions, the conformation, the material, as well as the internal tensions, requires a specific straightening action.
  • first axis and the second axis of the first roller and of the second roller, respectively, are arranged at a different distance from the rotation axis of the movable frame.
  • first axis and the second axis of the first roller and of the second roller are not diametrically opposed to the rotation axis of the movable frame.
  • the assembly according to the invention is able to meet these needs, by diversifying the straightening action with the control, preferably, of a single motor member, which determines the arrangement of the first roller and the second roller in said angular straightening configuration.
  • the straightener assembly may comprise a single motor member which easily controls the controlled rotation of the frame, thus regulating the straightening efficiency of the straightening members, that is of the first roller and the second roller.
  • the reference numeral 1 indicates as a whole an apparatus for processing elongated metal elements 2, in particular profiles and metal rods, comprising a straightener assembly 10.
  • the straightener assembly 10 is suitable for straightening at least one element 2 fed along a feeding line A according to a feeding direction indicated by a corresponding arrow in Figure 1 , from an inlet section 3 to an outlet section 4 of the apparatus 1. It is also possible to provide for the assembly 10 to be configured to straighten, for example, a pair of elements 2 fed to the apparatus 1 simultaneously. In the following of the present description, reference will be made to a single element 2, meaning however, due to the different features illustrated and/or involved, the possibility of feeding a plurality of elements 2, for example a pair.
  • the apparatus may comprise, for example, at least one drawing assembly 5, no matter how arranged and produced, for example of the type of clamp, of crawler track, with a larger wheel and smaller contrast wheels, associated with the straightener assembly 10, for example downstream along the feeding line A according to said feeding direction.
  • the straightener assembly 10 may also be associated with further auxiliary drawing and/or straightening assemblies 6 arranged along the feeding line A downstream and/or upstream of the same assembly (see Figure 1 ) and cooperating with it.
  • the apparatus may also comprise an inserter assembly 7 arranged at the inlet section 3 and preferably equipped with an inserter device 8 and a replacement device 9, to ensure the correct insertion of the element 2 along the feeding line A and the replacement of the element 2 in case of exhaustion or change of production, for example for processing an element of different transversal size or diameter.
  • the straightener assembly 10 comprises a movable frame 11, carrying at least a first roller 12a and a second roller 12b, fixed rotatable around a first axis 13a and a second axis 13b respectively.
  • the first axis 13a and the second axis 13b are arranged parallel and spaced so that a passage between the first roller 12a and the second roller 12b for the element 2 on a plane orthogonal to them is defined.
  • first roller 12a and the second roller 12b are secured idly on the frame 11.
  • at least one of the first roller 12a and the second roller 12b is motorized or that both are motorized.
  • the movable frame 11 is operated by a respective motor member 14, according to a rotation motion about a rotation axis 15.
  • the frame 11 holding the first roller 12a and the second roller 12b is therefore movable and preferably positioned continuously on command of the motor member 14 among a wide variety of angular configurations.
  • the frame 11 may be operated according to a rotation movement in a manual way, for example through the use of a suitably arranged crank member.
  • the frame 11 may be positioned at least in an angular insertion position, for example which is illustrated in Figure 1 , where the first roller 12a and the second roller 12b are arranged opposite each other with respect to the feeding line A and the passage defined between the first roller 12a and the second roller 12b is such as to enable the free passage of the rod along a substantially rectilinear path, corresponding to the feeding line A, for inserting the element 2, and in an angular straightening configuration, in which the first roller 12a and the second roller 12b are both at least partially on the same side with respect to the feeding line A, so that the aforementioned passage is arranged along a sinuous path capable of straightening the same element 2, as shown for example in Figure 2 .
  • first roller 12a and the second roller 12b are arranged eccentrically with their respective axes 13a, 13b with respect to the rotation axis 15 of the frame 11.
  • This circumstance makes it possible to achieve a variety of paths, more or less sinuous, in particular capable of generating an accentuated plastic deformation of the material, which may be modulated at will, therefore suitable for straightening elements 2 of any kind, for the passage path suitable for the element 2 to be straightened.
  • the first roller 12a and the second roller 12b are preferably made of different diameters, so as to be able to define the widest range of sinuous paths for the metal element 2 and, therefore, deformations, in order to be able to identify the most suitable configuration for straightening a variety of elements 2.
  • the frame 11 may be made, for example, in the form of a disk, for reasons of compact construction. Alternatively, it is possible to provide other embodiments of the same frame 11 provided that they are suitable for the purpose.
  • the rollers 12a and 12b may be in any position because they are not diametrically opposite to the axis 15.
  • the frame 11 has additional holes prepared for fixing the first wheel 12a and the second wheel 12b, so as to correspondingly expand the possibility of placing them on the frame 11, adapting the arrangement, therefore also the mutual distance, of the first wheel 12a and of the second wheel 12b to the type of element 2 to be straightened.
  • the frame 11 may be rotated both clockwise and anticlockwise, so as to be able to impart the desired deformation correspondingly by means of the first wheel 12a or the second wheel 12b, according to the type of element 2 to be straightened.
  • the straightener assembly 10 is positioned in the insertion angular configuration, on command of the motor member 14, to enable the insertion of the element 2 along the feeding line A (see Figure 1 ).
  • the inserted element 2 is then engaged by drawing means, for example by the drawing assembly 5 and/or by the auxiliary assemblies 6.
  • the straightener assembly 10 is positioned, for example on command of the motor member 14, in the angular straightening configuration, in which the first roller 12a and the second roller 12b are rotated around the rotation axis 15, so that said passage is arranged along a sinuous path suitable for straightening the element 2.
  • This path resulting in practice from the angular rotation of the frame 11, may be preferably adjusted on the basis of the particular features of the element 2 to be straightened. These features may include the transverse dimension, the surface state, the presence of internal stresses and the mechanical features of the steel used for element 2.
  • the element 2 is fed along the feeding line A, through the straightener assembly 10, so that it is subjected to an effective straightening action following the passage through said sinuous path defined by the first roller 12a and the second roller 12b arranged in the straightening angular configuration to finally arrive in a sufficiently malleable state for being able to be arranged with good precision and stably in a rectilinear configuration by the finishing assemblies located further downstream.
  • the portion of element 2 inserted inside the apparatus 1 must be extracted, by moving the same element 2 along the feeding line A in a direction opposite to the supply direction mentioned above.
  • the inserted element 2 is warped, in particular bent, in a corresponding portion, following the passage through the straightener assembly 10 arranged in the angular straightening configuration.
  • the warped curve of said portion of the element 2 may easily become further curved due to the generated friction instead of move back, creating a loop, or in any case it tends to oppose a considerable resistance to the extraction of the element 2 along the substantially rectilinear channel, defined by the other members arranged between the straightener assembly 10 and the inlet section 3 along the feeding line A.
  • the frame 11 is then driven in rotation, preferably by means of the motor member 14, so that the bending is performed, for example in successive steps, in the opposite direction of said curved portion, so as to straighten it at least roughly, but in such a way as to enable the drawing of the element 2 in the opposite direction of the feeding direction (see Figures 3 to 6 ).
  • the straightener assembly 10 is movable along the feeding direction A between an advanced position in the feeding direction and a backward position (see Figures 7 and 8 ).
  • the straightener assembly 100 comprises a wire guide device 16, for facilitating the guide of the element 2 in the step of insertion of the element 2 which, in particular when it has not yet been subjected to a straightening cycle.
  • the wire guide device 16 is arranged downstream of the straightener assembly 100, according to the feeding direction mentioned above.
  • the wire guide device 16 may for example be made by means of a pair of containment members 17, 18, arranged on opposite sides with respect to the feeding line A.
  • each containment member 17, 18 may shape a jaw.
  • the containment members 17, 18 are alternatively movable between an inactive configuration, separated from the feeding line A (see figure 10 ), and an active configuration, placed next to the feeding line A, so as to cooperate mutually to define a guide channel for element 2 (see Figure 10 ).
  • each containment member 17, 18 may be operated rotating, between the inactive, open configuration and the active, closed configuration, such as to contribute to define said guide channel.

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

Claims (17)

  1. Procédé de redressement d'éléments métalliques allongés, en particulier de tiges métalliques, comprenant les étapes consistant à :
    a. agencer, au moins pour l'un desdits éléments (2), un ensemble de redressement (10, 100) le long d'une ligne d'alimentation (A), comprenant un cadre (11) portant un premier rouleau (12a) et un second rouleau (12b), pouvant tourner respectivement autour d'un premier axe (13a) et d'un second axe (13b), qui sont parallèles entre eux et espacés de manière à définir entre ledit premier rouleau (12a) et ledit second rouleau (12b) un passage pour au moins ledit élément (2) sur un plan orthogonal audit premier axe (13a) et audit second axe (13b),
    le procédé étant caractérisé en ce que ledit cadre (11) peut fonctionner dans un mouvement de rotation autour d'un axe de rotation (15) parallèle audit premier axe (13a) et audit second axe (13b), au moins entre une configuration angulaire d'insertion pour insérer ledit élément (2) le long de ladite ligne d'alimentation (A), ledit premier rouleau (12a) et ledit second rouleau (12b) étant agencés à l'opposé l'un de l'autre par rapport à ladite ligne d'alimentation (A) et ledit passage défini entre ledit premier rouleau (12a) et ledit second rouleau (12b) étant aligné avec ladite ligne d'alimentation (A) pour l'insertion dudit élément (2), et au moins une configuration angulaire de redressement, ledit premier rouleau (12a) et ledit second rouleau (12b) étant tous deux du même côté, au moins partiellement, par rapport à ladite ligne d'alimentation (A), de manière à agencer ledit passage le long d'un trajet sinueux prédisposé pour redresser ledit élément (2) ;
    et en ce qu'il comprend les étapes supplémentaires consistant à :
    b. positionner ledit ensemble de redressement (10, 100) dans ladite configuration angulaire d'insertion, actionner ledit cadre (11) dans ledit mouvement de rotation et insérer ledit élément (2) le long de ladite ligne d'alimentation (A) à travers ledit ensemble de redressement (10) dans ladite configuration d'insertion ;
    c. mettre en prise ledit élément (2) inséré ;
    d. positionner ledit ensemble de redressement (10, 100) dans ladite configuration angulaire de redressement, et acheminer ledit élément (2) le long de ladite ligne d'alimentation (A), de manière à redresser ledit élément (2).
  2. Procédé selon la revendication 1, caractérisé en ce que ledit premier rouleau (12a) et ledit second rouleau (12b) sont positionnés de manière excentrique par rapport audit axe de rotation (15).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'au moins l'un dudit premier rouleau (12a) et dudit second rouleau (12b) est monté fou sur ledit cadre (11).
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit trajet sinueux est aligné avec ladite ligne d'alimentation (A), à la fois en amont et en aval dudit ensemble de redressement (10, 100).
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend l'étape supplémentaire consistant à actionner ledit cadre (11) le long de ladite ligne d'alimentation (A) dans une direction opposée à une direction d'acheminement dudit élément (2), de manière à effectuer la rétraction dudit élément (2) afin de permettre l'extraction dudit élément (2) dudit appareil (1) par des éléments de traction (9).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend l'étape supplémentaire consistant à soumettre ledit élément à au moins une action de contre-flexion, au moyen dudit ensemble de redressement (10, 100), avant d'extraire ledit élément (2) dudit ensemble de redressement (10, 100), dans une direction opposée à la direction d'alimentation le long de ladite ligne d'alimentation (A).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdites étapes de positionnement b.) et/ou d.) dudit ensemble de redressement (10, 100) se produisent par la commande d'un organe moteur (14).
  8. Ensemble de redressement pour éléments allongés métalliques, agencé pour redresser au moins un élément (2) le long d'une ligne d'alimentation (A), comprenant un cadre (11) portant un premier rouleau (12a) et un second rouleau (12b), pouvant tourner respectivement autour d'un premier axe (13a) et d'un second axe (13b), parallèles entre eux, et espacés de manière à définir entre ledit premier rouleau (12a) et ledit second rouleau (12b) un passage pour au moins ledit élément (2) sur un plan orthogonal audit premier axe (13a) et audit second axe (13b) ; caractérisé en ce que ledit cadre (11) peut fonctionner dans un mouvement de rotation autour d'un axe de rotation (15) parallèle audit premier axe (13a) et audit second axe (13b), au moins entre une configuration angulaire d'insertion pour insérer ledit élément (2) le long de ladite ligne d'alimentation (A), ledit premier rouleau (12a) et ledit second rouleau (12b) étant agencés à l'opposé l'un de l'autre par rapport à ladite ligne d'alimentation (A) et ledit passage défini entre ledit premier rouleau (12a) et ledit second rouleau (12b) étant aligné avec ladite ligne d'alimentation (A) pour l'insertion dudit élément (2), et au moins une configuration angulaire de redressement, ledit premier rouleau (12a) et ledit second rouleau (12b) étant tous deux du même côté, au moins partiellement, par rapport à ladite ligne d'alimentation (A), de manière à agencer ledit passage le long d'un trajet sinueux approprié pour redresser ledit élément (2).
  9. Ensemble de redressement selon la revendication 8, caractérisé en ce que ledit premier rouleau (12a) et ledit second rouleau (12b) sont montés de manière excentrique par rapport audit axe de rotation (15).
  10. Ensemble de redressement selon la revendication 8 ou 9, caractérisé en ce qu'au moins l'un dudit premier rouleau (12a) et dudit second rouleau (12b) est monté fou sur ledit cadre (11).
  11. Ensemble de redressement selon l'une quelconque des revendications 8 à 10, caractérisé en ce que ledit trajet sinueux est aligné avec ladite ligne d'alimentation (A), à la fois en amont et en aval dudit ensemble de redressement (10, 100).
  12. Ensemble de redressement selon l'une quelconque des revendications 8 à 11, caractérisé en ce que ledit cadre (11) peut être actionné en mouvement le long de ladite ligne d'alimentation (A) dans une direction opposée à une direction d'acheminement dudit élément (2), de manière à effectuer la rétraction dudit élément (2) dudit ensemble de redressement (10) et permettre l'extraction dudit élément (2) dudit appareil (1) en coopération avec des éléments de traction (9).
  13. Ensemble de redressement selon l'une quelconque des revendications 8 à 12, caractérisé en ce que ledit premier rouleau (12a) et ledit second rouleau (12b) ont des diamètres différents.
  14. Ensemble de redressement selon l'une quelconque des revendications 8 à 13, caractérisé en ce que ledit cadre (11) peut être actionné en mouvement de rotation dans les deux directions de rotation, de manière à obtenir des trajets différents, donc des déformations, pour ledit élément (2).
  15. Ensemble de redressement selon l'une quelconque des revendications 8 à 14, caractérisé en ce que ledit cadre (11) est mobile dans ledit mouvement de rotation en continu, de manière à pouvoir ajuster ledit trajet sinueux selon les besoins, d'où le degré de plastification de l'élément (2) à redresser.
  16. Ensemble de redressement selon l'une quelconque des revendications 8 à 15, caractérisé en ce que ledit cadre (11) est actionné dans ledit mouvement de rotation par un organe moteur (14).
  17. Ensemble de redressement selon l'une quelconque des revendications 8 à 15, caractérisé en ce que ledit premier axe (13a) et ledit second axe (13b) dudit premier rouleau (12a) et dudit second rouleau (12b) ne sont pas diamétralement opposés par rapport audit axe de rotation (15) dudit cadre (11).
EP20714290.2A 2019-02-25 2020-02-25 Procédé de redressement d'éléments métalliques allongés et ensemble redresseur destiné auxdits éléments Active EP3930938B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000002715A IT201900002715A1 (it) 2019-02-25 2019-02-25 Metodo per la raddrizzatura di elementi metallici di foggia allungata e gruppo raddrizzatore per tali elementi
PCT/IT2020/050037 WO2020174505A1 (fr) 2019-02-25 2020-02-25 Procédé de redressement d'éléments métalliques allongés et ensemble redresseur destiné auxdits éléments

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Publication Number Publication Date
EP3930938A1 EP3930938A1 (fr) 2022-01-05
EP3930938B1 true EP3930938B1 (fr) 2024-04-03

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IT (1) IT201900002715A1 (fr)
WO (1) WO2020174505A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1239175A (en) 1916-09-18 1917-09-04 Albert P Gilbert Wire-straightening machine.
US2517309A (en) * 1947-05-16 1950-08-01 Richard D Heller Wire straightener
DE19723635C2 (de) * 1997-06-05 1999-03-25 Witels App Masch Albert Gmbh Abspulrichter für draht- oder mehrdrahtförmiges Gut
KR100707912B1 (ko) * 2006-03-02 2007-04-13 박재화 텅스텐 도금선 제조장치 및 그 제조방법
ITUD20130029A1 (it) 2013-02-28 2014-08-29 Piegatrici Macch Elettr Apparato di traino e raddrizzatura per fili metallici, e relativo procedimento di traino e raddrizzatura

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EP3930938A1 (fr) 2022-01-05
IT201900002715A1 (it) 2020-08-25
WO2020174505A1 (fr) 2020-09-03

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