EP2627462B1 - Ensemble d'étirage pour machines pour le travail des profilés métalliques - Google Patents

Ensemble d'étirage pour machines pour le travail des profilés métalliques Download PDF

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Publication number
EP2627462B1
EP2627462B1 EP11771100.2A EP11771100A EP2627462B1 EP 2627462 B1 EP2627462 B1 EP 2627462B1 EP 11771100 A EP11771100 A EP 11771100A EP 2627462 B1 EP2627462 B1 EP 2627462B1
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EP
European Patent Office
Prior art keywords
wheel
wheels
motor driven
drawing assembly
motor
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EP11771100.2A
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German (de)
English (en)
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EP2627462A1 (fr
Inventor
Simone Rupoli
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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
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • B21F23/002—Feeding means specially adapted for handling various diameters of wire or rod

Definitions

  • the present invention regards a drawing assembly as per the preamble of claim 1 designed to be applied in machines for working metal profiles, in particular iron rods for reinforced concrete.
  • An exemplary drawing assembly is known from FR 2 161 481 A5 .
  • shaped irons used for example to realize reinforcements for reinforced concrete, are generally obtained from metal profiles consisting of iron rods in rolls or in bars. To such an end, the metal profiles are fed, one or more, to operating machines which perform automatically the working thereof transforming them in a series of desired products.
  • machines for working metal profiles in rolls generally provide a drawing assembly suitable to perform the feed of the same profiles to the operating members of the machine, arranged along a predetermined feed line.
  • a drawing assembly suitable to perform the feed of the same profiles to the operating members of the machine, arranged along a predetermined feed line.
  • straightening members suitable to perform the correction of the curvature of the profiles, in particular if coming from rolls.
  • the drawing assembly can be arranged in an intermediate position between a first group of straightening members, lying on a substantially horizontal plane, and a second group of straightening members, lying on a substantially vertical plane.
  • the drawing assembly is generally formed by pairs of counter-rotating wheels, arranged in series.
  • the drawing assembly can consist of a series of drawing wheels suitably motor driven and a series of contrast wheels freely rotatable or motor driven as well, arranged substantially on a same longitudinal plane, suitable to determine therebetween a feed path for the metal profiles to be fed to the machine.
  • the wheels of the drawing assembly can be flat or grooved, i.e. having an annular throat which is engaged in use by the profile moving forward.
  • a drawing assembly of this type is illustrated for example in patent application EP 1706233 .
  • Machines designed to work more than one profile at the same time have been also known, for example the so-called bifilar machines which allow to work a pair of iron rods at the same time; nevertheless machines able to work more than two wires simultaneously have also been known.
  • the drawing assembly must be able to feed to the machine at least one pair of profiles, arranged side by side along the feed line.
  • the wheels of the drawing assembly can be flat or have a double groove, engaged in use by the aforesaid pair of irons.
  • the drawing assembly of such machines can normally operate on two or more rods only up to an upper limit of the diameter of the same rods, beyond which the power of the apparatus is not enough to produce the feeding. Above the aforesaid limit, it is usual practice to use the drawing assembly to feed one only rod at time, to such an end usually using the most internal annular throat of the drawing wheels. Therefore a bigger wear and tear of one of the annular throats with respect to the other one can appear in the time, and as a consequence a different behaviour of such throats in operation of drawing two rods.
  • Patent IT 1267278 discloses a drawing assembly provided with a device compensating for the lengthening of at least two metal rods.
  • a compensator device provides a pair of counter-rotating grooved rollers, at least one of which is mobile parallel to itself on the plane containing the axis of the same rollers, while the other one is tilting on said plane containing the axis and is subjected to adjustment means.
  • By inclining differently the tilting roller it is possible to exert a different pressure on the rods in the throats of the rollers, recovering the different lengthening of the rods.
  • the task of the present invention is that of solving the aforementioned problems, devising a drawing assembly which allows to feed in an optimal manner more than one metal profile to a machine for working such metal profiles, in particular ensuring the correct length of each profile supplied to the machine when this latter works more than one profile at the same time.
  • a further scope of the present invention is that of providing a drawing assembly which allows to obtain an independent drawing for profiles being worked simultaneously, so as to produce at the same time profiles with lengths identical or intentionally different to each other even if worked parallel and at the same time by the same machine.
  • Another object of the present invention is that of providing a drawing assembly having a simple conception, a securely reliable functioning and versatile use, as well as relatively economic cost.
  • the drawing assembly comprises one or more pairs of counter-rotating drawing wheels, having a work position wherein the drawing wheels are clamped on the metal profiles to be fed, to draw the same metal profiles, at least one of which wheels is doubled so as to define a first wheel and a second wheel independent from each other, arranged side by side and coaxial to each other, at least one of said first and second wheels placed beside being motor driven and counter-rotating with an opposite pressure wheel freely rotatable or equally motor driven, coplanar to it, in order to clamp said metal profile.
  • the present invention also concerns a method for drawing metal profiles which provides for feeding a first profile to a first motor driven wheel of a drawing assembly comprising pairs of counter-rotating drawing wheels, between which are suitable to be clamped the metal profiles to be fed in a machine for working such metal profiles; clamping said first profile by means of a first pressure wheel counter-rotating with respect to said first motor driven wheel; feeding a second profile to a second wheel of said drawing assembly, motor driven in an independent way with respect to said first motor driven wheel; clamping said second profile by means of a second pressure wheel counter-rotating with respect to said second motor driven wheel; actuating in an independent manner the drawing of said first and said second profile clamped respectively between said first motor driven wheel and said first pressure wheel and between said second motor driven wheel and said second pressure wheel.
  • drawing unit designed for use in machines for working metal profiles 2 is indicated in its entirety with 1.
  • the drawing assembly 1 comprises a series of drawing wheels 11, 12 suitably motor driven, arranged in pairs on a same vertical plane and suitable to determine between them a feed path for the metal profiles 2 to be fed to the machine. More particularly, the drawing assembly 1 provides a series of drawing wheels 11 having preferably a fixed axis, arranged at the lower side of the feed path of the profiles 2, and a corresponding series of counter-rotating wheels 12, preferably mobile on their own lying plane, arranged at the upper side of the aforesaid feed path. In the illustrated case, the drawing assembly 1 provides three pairs of drawing wheels 11, 12, but it is obviously possible to provide a different number of drawing wheels, according to the specific requirements of use.
  • the upper wheels 12 are carried by an actuation device 4, suitable to perform the shifting of the same upper wheels 12 between a raised opening position and a lowered position wherein such upper wheels are pressed towards the underlying lower wheels 11.
  • the actuation device 4 preferably provides a single actuator member 5 mounted, with a substantially horizontal axis, between a pair of lever arms 6, practically squaring shaped and pivoted, at corresponding pins 7, to the fixed framework 3 of the drawing assembly.
  • the squaring levers 6 are articulated by means of connecting rods 8 to a frame 9 which carries the upper wheels 12.
  • the actuation in extension of the actuator member 5 triggers the divarication of the lever arms 6, so as to determine the simultaneous lifting of the upper wheels 12 in the opening position of the drawing assembly 1.
  • the opposite closing movement of the actuator member 5 obviously determines the simultaneous descent of the same upper wheels 12 in the position for drawing the metal profiles.
  • the drawing wheel arranged in central position is provided with an autonomous handling with respect to the frame 9.
  • the drawing wheels 11, 12 are doubled in a way as to define each a first wheel 11 a, 12a and a second wheel 11 b, 12b arranged side by side and coaxial to each other (see figures 2 and 3 ).
  • Such first wheel 11 a, 12a and second wheel 11 b, 12b have a respective annular throat 10 in which is clamped the metal profile 2 moving forward.
  • a pair of metal profiles 2 placed side by side in longitudinal direction.
  • the first wheel 11 a, 12a and the second wheel 11b, 12b of the drawing wheels 11, 12 are alternatively motor driven, through the connection to a suitable motor member 13, 14, or carried freely rotatable according the same rotation axis.
  • the drawing wheels 11, 12 are respectively constituted by a first motor driven wheel 11 a, 12a which is arranged beside a second pressure wheel 11 b, 12b freely rotatable according to the same rotation axis (see also the scheme of fig. 5 ).
  • the motor driven wheels 11 a, 12a are carried cantilevered by a motor shaft 15, 16 mounted in axis to the motor member 13, 14 and supported rotatable, through suitable bearing members 17, 18, on the fixed framework 3.
  • the motor driven wheels 11 a, 12a are fixed frontally to the motor shaft 15, 16 through suitable mechanical fixing members 19, 20, while the freely rotatable pressure wheels 11b, 12b are mounted on the motor shaft 15, 16 by interposition of bearing members 21, 22. Nevertheless it is possible to provide that the pressure wheels are autonomous, as can be seen for example in the scheme of figure 6 .
  • Each motor driven wheel 11 a, 12a cooperates with an opposite antagonist wheel, also called pressure wheel 11 b, 12b, freely rotatable to clamp the wire 2 by means of a relative movement, coplanar to it (see again fig. 2 ).
  • each metal profile 2 of the pair of profiles simultaneously fed by the drawing assembly is clamped respectively between a motor driven wheel 11 a, 12a and a freely rotatable counter-rotating pressure wheel 11 b, 12b of the drawing wheels 11, 12.
  • the drawing wheels 11, 12 arranged in series have the motor driven wheels 11 a, 12a and the pressure wheels 11b, 12b staggered in longitudinal direction, i.e. alternatively arranged towards the inside and towards the outside of the drawing assembly.
  • the metal profiles 2 to be fed to the machine move forward side by side along the feed line defined by the counter-rotating drawing wheels 11, 12.
  • the metal profiles 2 are clamped between the annular throats 10 of such drawing wheels 11, 12 when the upper wheels 12 have been taken by the actuation device 4 into the work position lowered against the lower wheels 11.
  • the drawing wheels 11, 12 being doubled in a first motor driven wheel 11 a, 12a and a second freely rotatable pressure wheel 11 b, 12b, the forward motion of each metal profile 2 is determined by the actuation of the motor driven wheels 11 a, 12a by which the profile is directly engaged, independently from the metal profile placed beside thereto.
  • it is possible to control the forward motion of the single profile for example through encoder means, necessarily doubled as well, and as a consequence it is possible to determine with precision and autonomously the length of the tract of each profile fed to the machine.
  • the length of the tract of profile fed to the machine is irrespective of possible wear and tear phenomena of the throats of the drawing wheels, mechanical impediments or other motives of irregularity of the drawing strength.
  • FIG 4 is illustrated a different embodiment of the drawing assembly according to the present invention, wherein a drawing wheel 12 of the pair of doubled drawing wheels 11, 12 is composed of a first and a second wheel both motor driven, for major clarity indicated with 12c, 12d, while the counter-rotating drawing wheel 11 is composed of a first and a second antagonist wheel or pressure wheel 11 c, 11 d both freely rotatable (see also the scheme of fig. 7 ).
  • the motor driven wheels 12, 12d are carried cantilevered by respective motor shafts 23, 24 coaxial to each other and suitable to be actuated by respective motor members, not represented.
  • the motor shaft 24 of the second motor driven wheel 12d is realized in tubular shape and carries axially inserted, longitudinally passing in, the motor shaft 23 of the first motor driven wheel 12c.
  • the tubular shaft 24 is supported rotatable, through suitable bearing members 25, on the fixed framework 3, and carries rotatable the coaxial shaft 23 through further bearing members 26.
  • the first wheels 11 a, 12a and the second wheels 11 b, 12b can be all motor driven.
  • FIGS 8, 9 and 10 is illustrated a further embodiment of the drawing assembly according to the present invention, wherein only one of the metal profiles 2 placed beside is clamped and drawn between a driving wheel and an opposite pressure wheel, lacking the action of the pressure wheel on the second profile.
  • a second profile is clamped and drawn between a driving wheel and an opposite pressure wheel of the successive pair of drawing wheels, while the first profile is free from the pressure wheel.
  • the lower wheels which do not operate the drawing of the metal profile carry out a function of guide for the same profiles.
  • the drawing assembly in hand therefore attains the scope of feeding in an autonomous manner more than one metal profile to a machine for working such metal profiles, in particular ensuring the correct length of each profile supplied to the machine, when this latter works more than one metal profile at the same time.
  • a characteristic of the drawing assembly in hand is that of allowing to keep clamped more than one profile at the same time, but to draw only one or alternatively both in order to control singly the length thereof. It is evident that to such an end it is also necessary that the wheels of the straightening members are doubled, as the members measuring the metal profiles, for example consisting of conventional measure wheels, must be doubled.
  • the present solution of doubling the drawing wheels results in being even more efficient if associated with the use of a roller straightener wherein the single straightening wheels are doubled as well.
  • the lines of both profiles moving forward in parallel would be completely autonomous and separated.
  • a single profile could also be maintained arrested in order not to produce further pieces, without having to extract the same profile with an unavoidable stop of the machine.
  • the present invention turns out to be very flexible, and in particular such as to allow also the simultaneous production of pieces with different lengths.
  • the present solution can obviously be applied to drawing assemblies anyway shaped as for arrangement and dimensions of the drawing wheels, as well as for the shape of the throats of such drawing wheels. It is for example possible to provide that the throats have different diameters for working metal profiles having different diameters.
  • the drawing assembly described for indicative purpose is susceptible of various modifications and variants according to the exigencies.
  • inventive idea of doubling the drawing wheels in order to control in an independent manner the forward motion of the single metal profiles can be usefully applied also to drawing assemblies using belt means, pliers means or other similar ones, known in the considered field and constituting in every respect technical equivalents of the counter-rotating drawing wheels.
  • the embodiment of the invention may vary depending on the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Forging (AREA)
  • Multi-Process Working Machines And Systems (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Metal Extraction Processes (AREA)

Claims (8)

  1. Ensemble d'entraînement dans des machines pour le travail des profilés métalliques, comprenant un ou plusieurs couples de roues d'entraînement (11, 12) contrarotatives, entre lesquelles sont serrés les profilés métalliques (2) à alimenter, dans lequel lesdites roues d'entraînement (11, 12) sont dédoublées de sorte que chaque couple de roues définit une première roue (11a, 12a) et une seconde roue (11 b, 12b), caractérisé en ce que ladite première roue (11a, 12a) et ladite seconde roue (11 b, 12b) sont indépendantes l'une de l'autre, disposées côte à côte et coaxiales, et en ce qu'au moins une roue (11 a, 12a) des dites première et seconde roues placées côte à côte est motorisée et contrarotative par rapport à une roue presseuse (11b, 12b), lui faisant face, pouvant tourner librement ou également motorisée et située dans le même plan qu'elle, pour serrer un profilé métallique (2) respectif.
  2. Ensemble d'entraînement selon la revendication 1, caractérisé en ce que lesdites première roue (11a, 12a) et seconde roue (11b, 12b) côte à côte présentent une respective gorge annulaire (10) dans laquelle ledit profilé métallique (2) est guidé en avancement.
  3. Ensemble d'entraînement selon la revendication 1 ou 2, caractérisé en ce que lesdites roues d'entraînement (11, 12) sont respectivement constituées d'une dite première roue (11a, 12a) motorisée qui est disposée côte à côte d'une dite seconde roue presseuse (11b, 12b) pouvant tourner librement selon le même axe de rotation.
  4. Ensemble d'entraînement selon la revendication 1 ou 3, caractérisé en ce que lesdites roues motorisées (11 a, 12a) sont portées en porte-à-faux par un arbre moteur (15, 16) apte à être actionné par un organe moteur (13, 14) et supporté pouvant tourner, par l'intermédiaire des organes de roulement (17, 18), sur un châssis (3) fixe.
  5. Ensemble d'entraînement selon la revendication 4, caractérisé en ce que lesdites roues presseuses (11 b, 12b) pouvant tourner librement sont montées sur ledit arbre moteur (15, 16) par interposition d'organes de roulement (21, 22).
  6. Ensemble d'entraînement selon la revendication 1 ou 2, caractérisé en ce qu'une roue d'entraînement (12) dédoublée desdits couples de roues d'entraînement (11, 12) contrarotatives est composée d'une dite première et d'une dite seconde roue (12c, 12d), toutes deux motorisées, tandis que la roue d'entraînement (11) contrarotative est composée d'une dite première et d'une dite seconde roue presseuse (11c, 11 d) toutes deux pouvant tourner librement.
  7. Ensemble d'entraînement selon la revendication 6, caractérisé en ce que lesdites roues motorisées (12c, 12d) sont portées en porte-à-faux par les respectifs arbres moteurs (23, 24) coaxiaux les uns avec les autres et aptes à être actionnés par les respectifs organes moteurs, l'arbre moteur (24) de ladite seconde roue motorisée (12d) étant réalisé de forme tubulaire et portant axialement inséré, longitudinalement à travers, l'arbre moteur (23) de ladite première roue motorisée (12c).
  8. Méthode d'entraînement pour utiliser un ensemble d'entraînement, selon la revendication 1, dans des machines pour le travail des profilés métalliques, caractérisé en ce qu'il prévoit de
    a. alimenter un premier profilé métallique (2) à une première roue (11a) motorisée d'un ensemble d'entraînement comprenant un ou plusieurs couples de roues d'entraînement (11, 12) contrarotatives, entre lesquelles sont aptes à être serrés dans une position de travail les profilés métalliques (2) à alimenter à la machine ;
    b. serrer ledit premier profilé métallique (2) par l'intermédiaire d'une première roue presseuse (12b) contrarotative par rapport à ladite première roue (11a) motorisée ;
    c. alimenter un second profilé métallique (2) à une seconde roue (12a) dudit ensemble d'entraînement, ladite seconde roue (12a) étant motorisée de façon indépendante par rapport à ladite première roue (11a) motorisée ;
    d. serrer ledit second profilé métallique (2) par l'intermédiaire d'une seconde roue presseuse (11 b) contrarotative par rapport à ladite seconde roue (11 a/12a) motorisée ;
    e. actionner de façon indépendante l' entraînement dudit premier et dudit second profilé métallique (2) serrés respectivement entre lesdites première roue motorisée (11a) et première roue presseuse (12b) et entre lesdites seconde roue (12a) motorisée et seconde roue presseuse (11 b).
EP11771100.2A 2010-10-14 2011-10-13 Ensemble d'étirage pour machines pour le travail des profilés métalliques Active EP2627462B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2010A000618A IT1401850B1 (it) 2010-10-14 2010-10-14 Gruppo di traino in macchine per lavorare profilati metallici
PCT/EP2011/067880 WO2012049244A1 (fr) 2010-10-14 2011-10-13 Ensemble d'étirage pour machines pour le travail des profilés métalliques

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Publication Number Publication Date
EP2627462A1 EP2627462A1 (fr) 2013-08-21
EP2627462B1 true EP2627462B1 (fr) 2016-08-10

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EP (1) EP2627462B1 (fr)
IT (1) IT1401850B1 (fr)
WO (1) WO2012049244A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700079221A1 (it) * 2017-07-13 2019-01-13 Schnell Spa Metodo per la correzione automatica della raddrizzatura di elementi metallici di foggia allungata e apparecchiatura per la raddrizzatura di tali elementi

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CN102922362B (zh) * 2012-10-25 2014-11-05 溧阳市超强链条制造有限公司 一种高速切销机的防轧轮松动装置
ITUD20130011A1 (it) * 2013-01-29 2014-07-30 Fabro Giorgio Del Apparato di traino e/o raddrizzatura per fili metallici, macchina di piegatura/sagomatura comprendente detto apparato e relativo procedimento di traino e/o raddrizzatura
AT515282B1 (de) * 2014-03-31 2015-08-15 Evg Entwicklung Verwert Ges Dressurvorrichtung

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DE582537C (de) * 1932-04-01 1933-08-17 Heraeus Vacuumschmelze Akt Ges Mehrfachdrahtziehmaschine
FR2161481A5 (en) * 1971-11-26 1973-07-06 Soudure Autogene Francaise Drive for multiple weld rods - ensures that rods of different dias are driven at the same linear speed from one motor
DE4418975C1 (de) * 1994-03-31 1995-09-28 Jaeger Emil Gmbh Co Kg Vorschubeinrichtung für Längsdrähte mit doppelseitigem Antrieb
IT1267278B1 (it) 1994-07-20 1997-01-28 Piegatrici Macch Elettr Dispositivo compensatore dell'allungamento di almeno due fili, o tondini, associato ad un gruppo di tiro
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IT1391890B1 (it) * 2008-10-14 2012-01-27 Piegatrici Macch Elettr Gruppo di traino e/o raddrizzatura per prodotti metallici oblunghi, quali barre, tondini o fili metallici

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700079221A1 (it) * 2017-07-13 2019-01-13 Schnell Spa Metodo per la correzione automatica della raddrizzatura di elementi metallici di foggia allungata e apparecchiatura per la raddrizzatura di tali elementi
WO2019012569A1 (fr) * 2017-07-13 2019-01-17 Schnell S.P.A. Procédé destiné à la correction par redressage automatique d'éléments métalliques allongés et appareil de redressage destiné auxdits éléments

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EP2627462A1 (fr) 2013-08-21
IT1401850B1 (it) 2013-08-28
WO2012049244A1 (fr) 2012-04-19
ITBO20100618A1 (it) 2012-04-15

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