EP2802426B1 - Ziehanordnung in maschinen zur bearbeitung von metallprofilen und entsprechendes verfahren - Google Patents

Ziehanordnung in maschinen zur bearbeitung von metallprofilen und entsprechendes verfahren Download PDF

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Publication number
EP2802426B1
EP2802426B1 EP13704553.0A EP13704553A EP2802426B1 EP 2802426 B1 EP2802426 B1 EP 2802426B1 EP 13704553 A EP13704553 A EP 13704553A EP 2802426 B1 EP2802426 B1 EP 2802426B1
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Prior art keywords
profiles
wheel
framework
couple
wheels
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English (en)
French (fr)
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EP2802426A1 (de
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Aronne Miglioranza
Bernardino Monti
Massimo Montemarani
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles

Definitions

  • the present invention concerns a drawing assembly, which can be included in machines for working metal profiles, in particular iron rods for reinforced concrete.
  • profiled irons used for example for making reinforcements for reinforced concrete, are generally produced starting from metal profiled consisting of metal rods in coils or bars.
  • metal profiles are fed, one or more, to working machines which automatically perform the manufacturing thereof, transforming them in a series of pre-designed products.
  • machines for working metal profiles in coils generally comprise a drawing assembly suitable to perform the feeding of the same profiles to the working members of the machine, arranged along a pre-established feeding line.
  • straightening members are provided suitable to correct the bend of the profiles, especially in case they come from coils.
  • the drawing assembly can be arranged in an intermediate position between a first group of straightening members, laying on a substantially horizontal plane, and a second group of straightening members, laying on a substantially vertical plane.
  • the drawing assembly is generally made by one or more couples of counter-rotating wheels, arranged in series.
  • the drawing assembly can be made by a series of drawing wheels suitably motorized and a series of freely rotatable or equally motorized contrast wheels, substantially arranged on a same longitudinal plane, suitable to shape between them a feeding path, not always linear, for the metal profiles feeding to the machine.
  • the wheels of the drawing assembly can be flat or grooved, that is having an annular throat which is engaged in use by the feeding profile.
  • Machines for working at the same time more profiles are known as well, for example so called “double-line” machines which allow to work simultaneously a couple of iron rods, in which the drawing assembly must be able to feed to the machine a couple of profiles, arranged side by side along a feeding line.
  • the wheels of the drawing assembly can be flat or have a double groove, engaged in use by the above mentioned couple of profiles.
  • metal rods do not have a perfect constant or circular section, on the contrary they often have a flat or elliptical shape, having one or more longitudinal ribbings, which extend all along the length of the profile and, in particular if they are fed unfolding from a coil, they have their section twisted like a helix according to a longitudinal direction of the same rod (see figure 11 ).
  • the presence of such faults, which can be more or less evident, is due to the production technology and to the unfolding from the coils.
  • each metal rods reaches the drawing assembly with a longitudinally variable transversal section.
  • the helicoidal twisting produces an effect of rotation of the section, which in its turn has further shape irregularities, when passing through the drawing wheels.
  • the difference of sections of the two metal rods being worked cannot be equal or synchronized at all.
  • the pressure of the drawing assembly on each fed rod can vary, thus producing uncontrolled slidings which finally cause undesired differences in the feeding of the rods crossing the drawing assembly.
  • the European patent no. EP0693335 A1 discloses a drawing assembly provided with a device which compensates the extension of at least two metal rods.
  • Such compensating device comprises a couple of counter-rotating grooved rolls, one of which, at least, is mobile parallel to itself on the containment plane of the same rolls, while the other is tilting on said containment plane of the axes and subject to compensation means comprising screw means and spring elastic recall means.
  • the task of the present invention is that of solving the aforementioned problems, devising a drawing unit which allows to feed in an optimal way more than one metal rod to a machine for working such metal profiles, in particular assuring the correct distribution of the load on the drawing wheels in order to obtain the identical length of each profile fed to the machine.
  • Another scope of the invention is that of providing a drawing assembly having a simple conception, a surely reliable structure, a versatile use as well as relative economic costs.
  • the drawing assembly comprises at least a first wheel and a second wheel opposite and counter-rotating in a way as to define peripherally between them a feed path for a couple of profiles to be drawn, a motor member for driving at least one wheel of said first and said second wheel, a first support framework for the first wheel and a second support framework for said second wheel.
  • An actuation device is provided for alternatively driving the first wheel and the second wheel between a spaced opening position and an approached tightening position, wherein the first and the second wheel are pushed one towards the other for tightening the couple of feeding profiles, with a resulting tightening force suitable to the feeding of the same profiles.
  • the first support framework for the first wheel and the said second support framework for the second wheel are mounted tiltable to one another about a tilting axis parallel to the axes of the profiles arranged on the feed path.
  • Such tilting axis is arranged in the passage zone of the feeding profiles, for allowing the relative tilting of the first wheel and of the second wheel with respect to such tilting axis, of width and direction so as to spontaneously compensate different variations of section for the couple of feeding profiles. Further to such spontaneous adjustment the resulting tightening force is kept equally distributed on both profiles, so as to assure that the feeding of the couple of profiles is equally balanced, that is, aligned.
  • the free relative tilting of the wheels produces the spontaneous orientation of the same wheels, so as to equally distribute the tightening stress on the contact zones of both the feeding profiles. This continuously occurs during the drawing, thus producing the continuous relative tilting of the couple of drawing wheels, for adapting to the different sections which arrive step by step in the passage zone for the profiles, without requiring a tracer, or pursuer member, or the operator intervention.
  • the particular position of the above mentioned tilting axis and of the direction in which the force resulting by the applied forces acts serve as sensor for the survey of the section of both the feeding profiles, and as actuation member for the activation of the tilting suitable to constantly maintain the tightening on both feeding profiles and consequently for keeping the load equally distributed easing the construction and the quickness of the reaction when the shape of the profiles varies, always without requesting the external intervention of the operator.
  • the arrangement of the above mentioned tilting axis in the passage zone of the drawn profiles allows to reciprocally incline the drawing wheels without substantially modify the approaching of the wheels to the profiles and consequently the resulting tightening force, but, on the contrary, actively working for maintaining the same resultant tightening force constant and balanced on the drawn profiles.
  • Such hinge preferably comprises a first coupling portion shaped by the first framework and a second coupling portion shaped by the second framework.
  • the first coupling portion and the second coupling portion are then associated rotatable about the cited hinge axis, shaping each a tubular passage arranged around the hinge axis, for allowing the easy passage of the drawn profiles along the feeding path.
  • the cited hinge is preferably tubular or "hollow” for enabling the arrangement of the tilting axis of the support frameworks of the drawing wheels where the cited adjustment action through tilting is better performed, without hindering the feeding of the profiles, thus creating a "tunnel" effect.
  • the first framework is fixed while the second is pivoted mobile about the first framework around the cited tilting axis.
  • a counter-weight member suitably applied at least to the second mobile framework and linked through connection means, preferably of flexible type, to a counter-means anchored to a fixed portion of the apparatus in which the assembly is mounted, in order to compensate not only the weight of the members assembled overhang with respect to the rotation centre but also possible further unbalancing actions.
  • the cited tilting axis is arranged in a centred position between the above mentioned couple of profiles drawn in the feeding path.
  • the tilting connection between the first and the second framework is made through a plurality of articulations arranged externally to the passage zone of the profiles inserted in the feeding path.
  • the articulations are able to define a respective centre of instantaneous rotation virtually centred between the same profiles in the passage zone of the profiles, working in a completely corresponding manner according to the invention.
  • the drawing assembly comprises blocking means of the relative tilting of said first framework and of said second framework, for blocking the cited spontaneous compensation tilting and allowing in such way the passage of a single profile in the feeding path.
  • a couple of first wheels and a couple of opposed second wheels functioning as previously described.
  • the couple of second wheels is tilting with respect to the couple of first wheels, being each wheel of said couple of second wheels tiltable in an autonomous manner on a respective second framework.
  • the invention concerns as well a drawing method for a couple of profiles through a drawing assembly which comprises at least a first support framework for a first drawing wheel and a second support framework for an opposed and counter-rotating second drawing wheel, wherein the cited frameworks are tiltable to one another with respect to a tilting axis parallel to the feeding direction of the profiles, arranged in the passage zone of the feeding profiles.
  • the method provides to produce the drawing of the couple of profiles keeping a resultant tightening force which, in a manner corresponding to the drawing assembly described and claimed, is suitable to produce the spontaneous and reciprocal tilting of the first framework with respect to the second framework, of a width so as to compensate differentiated variation of section of the couple of profiles and keeping the above mentioned resultant tightening force equally distributed on the couple of feeding profiles.
  • the drawing assembly 1 comprises one or more drawing wheels 11, 12, at least one of which is motorized, arranged in couples, so that each couple of wheels is cooperating for peripherally shaping a feeding path for the metal profiles 2 to be fed. More precisely, that drawing assembly 1 comprises a series of first drawing wheels 11 having preferably fixed axis, arranged for example at the lower side of the feeding path for the profiles 2, and a corresponding series of counter-rotating second wheels 12, mobile on their laying plane, opposite to the first wheels 11 with respect to the above mentioned longitudinal feeding path, thus for example at the upper side.
  • the drawing assembly 1 comprises two couples of wheels 11, 12, each comprising a first wheel 11 and a second wheel 12, but it is possible to provide a different number of drawing wheels, according to the specific working requirements.
  • the wheels 11, 12 preferably comprise a respective annular groove 13 for housing and tightening the feeding metal profiles 2.
  • the wheels 11, 12 of the drawing assembly 1 thus comprise a couple of grooves 13 placed side by side.
  • a couple of metal profiles 2 which are arranged side by side, is drawn in longitudinal direction.
  • the cited grooves 13 are not provided, or to provide them alternatively on a wheel of each couple instead of on both.
  • the wheels 11, 12 are suitably motorized for performing the feeding of the profiles 2, through the connection with a suitable motor member 14, 15 (see figure 4 ).
  • a suitable motor member 14, 15 see figure 4 .
  • the first wheels 11 are mounted of a first framework 3, preferably fixed, while the second wheels 12 are mounted mobile on a second framework 4 tiltable with respect to the first framework 3.
  • the second wheels 12 are carried mobile by an actuation device 5, suitable to perform a sliding displacement of the same second wheels 12 between a spaced opening position, for example lifted, and an approached position, for example lowered, in which, when one or more profiles 2 are interposed between the same wheels, the first wheels 11 and the second wheels 12 are pushed one against the other in opposite direction towards the opposite first wheels 11, performing the tightening of the interposed profiles for their drawing along the cited feeding path, through a resulting tightening force A.
  • an actuation device 5 suitable to perform a sliding displacement of the same second wheels 12 between a spaced opening position, for example lifted, and an approached position, for example lowered, in which, when one or more profiles 2 are interposed between the same wheels, the first wheels 11 and the second wheels 12 are pushed one against the other in opposite direction towards the opposite first wheels 11, performing the tightening of the interposed profiles for their drawing along the cited feeding path, through a resulting tightening force A.
  • the actuation device 5 preferably comprises a single actuation member 6 mounted, with for example substantially horizontal axis, between a couple of lever arms 7, in practice square shaped and pivoted, at relative pins 8, to the second mobile support framework 4 of the drawing assembly.
  • the bell cranks 7 are articulated through connecting rods 9 for transmitting to the sliding support of the axis of the second wheels 12 the required pushing force through suitable counter-articulations.
  • the activation in extension of the actuation member 6 causes the reciprocal spacing of the lever arms 7, so as to produce the simultaneous lifting of the second wheels 12 in the opening position of the drawing assembly 1, which allows the insertion of the profiles 2 in the respective annular grooves 13.
  • the opposite closing movement of the actuation member 6 obviously produces the simultaneous stroke of the same second wheels 12 in the tightening position, that is in the drawing position for the metal profiles 2.
  • the second mobile framework 4 is pivoted to the first fixed framework 3 through a hinge, around a tilting or hinge axis parallel to the axes of the profiles 2, and preferably comprised between the planes containing the respective tightening forces acting on the same profiles 2 feeding on the drawing assembly 1, in order to enable the spontaneous adjustment of the wheels 11, 12 to the irregularities of the section of the feeding profiles 2.
  • the feeding profiles 2 can have an irregular actual shape 2' (see figures 5b , 12, 13, 14 and 15 ), characterized by ribbings 30 and grooves 31, or by other irregularities coming out from the technology used for their production, such as for example the one of giving the section a flattered or oval shape.
  • ribbings 30 are generally provided for easing the adherence of the profile with the surrounding concrete. Ribbings 30 can be arranged inclined along the longitudinal axis of the same profile 2. In this way the wheels 11, 12 of the drawing assembly 1 receive transversal sections with continuously variable shapes. Instead, grooves 31, which can be two or more, arranged on the perimetral rim of the section all along the length of the profile 2', are undesired irregularities, usually coming out from the technology used for their production.
  • the profile 2' is usually twisted with a substantially helicoidal shape wound around its same longitudinal axis, as illustrated for example in figure 15 .
  • the grooves 13 of the wheels 11, 12 can be themselves worn out and geometrically different, for example because of a different use of the grooves 13.
  • the first wheels 11 and the second wheels 12 can tilt to one another around the hinge axis of the hinge 20, so as to make a diverted arrangement with respect to the coplanar planes of the same wheels.
  • figure 7 shows a diverted arrangement of the wheels 11, 12, suitable to compensate the diameter difference of the sections of the profiles 2 feeding through the wheels 11, 12.
  • figure 8 is shown a diverted arrangement essentially similar, but suitable, in this case, to compensate the difference of thickness interposed between the wheels 112, 12, produced by different orientations of two feeding oval sections.
  • the hinge 20 thus serves for adjusting the reciprocal arrangement between the first wheels 11 and the opposed second wheels 12, according to the section variations and to the arrangement of the feeding profiles 2, 2'.
  • the hinge 20 can be made of a first coupling portion 21 shaped by the first framework 3 and by a second coupling portion 22 shaped by the second framework 4.
  • the first coupling portion 21 and the second rotatable coupling portion 22 are preferably associated rotatable through the interposition of suitable bearings, for simplicity not illustrated in figures.
  • the first coupling portion 21 and the second coupling portion 22 shape each a tubular path 23, 24 arranged around the hinging axis, so extended that they allow the easy passage of the profiles 2, 2' drawn along the feeding path.
  • the hinge axis of the hinge 20 is arranged in a substantially intermediate position on a plane containing the axes of the profiles feeding on the same containing plane, so as to allow as well spontaneous tilting + ⁇ , - ⁇ compensating the wheels 11, 12 in both directions, for the efficient tightening of all interposed profiles 2, 2'.
  • the orientation between the first wheels 11 and the second wheels 12 of the drawing assembly 1 varies according to an inclination centred on the rotation axis of the rotatable coupling defined by the hinge 20.
  • Such adjustment of the reciprocal inclination of the planes containing the wheels 11, 12 is automatically produced as a reaction of the tightening action produced by the actuation member 6. Thanks to this continuous adjustment, the illustrated solution, in which the hinge 20 has its hinging axis arranged at the passage zone of the profiles 2, 2', that is with a tubular or "hollow" hinge, that is provided with the tubular passages 23, 24, is optimal.
  • kinematic chains of the articulated square type can be used for producing a tilting movement in both directions of the planes of the wheels 11, 12, which are equivalent to the described hinge 20 from the functional point of view.
  • kinematic chains can comprise a plurality of articulations arranged externally to the passage zone of the profiles 2, 2', anyway they must be able to define a respective centre of rotation substantially centred between the same profiles, thus being able to spontaneously compensate in both tilting directions the section irregularities of the feeding profiles.
  • the drawing assembly 1 can advantageously comprise a counter-weight 16, suitably applied to the first framework 3 and to the second framework 4, in order to compensate the forces produced by the weight of the overhang members constrained to the second mobile framework 4 in contrast with the automatic adjustment of the inclination of the wheels 11, 12 to the profiles 2 feeding through the drawing assembly.
  • the counter-weight member 16 can as well compensate the weight of further working members which can be anchored to the working plane of the machine which, for ergonomic reasons, is usually arranged inclined with respect to a vertical plane. Therefore the contribution of such working members generally tends to generate a momentum with respect to the tilting axis of the hinge 20 or of the cited equivalent solutions, suitable to contrast the correct and spontaneous compensation of the section irregularities of the drawn profiles.
  • the counter-weight member 16 can be connected through suitable flexible means 17, for example, wires, cables and counter-means 18, 19 with a fixed portion of the machine in which the drawing assembly 1 is used.
  • actuation device 5 is activated for driving the drawing assembly 1 in the open position, suitable for the insertion of the profiles 2 to be fed.
  • the actuation device 5 is activated for tightening the profiles 2, 2' inserted in the respective grooves 13 between the first wheels 11 and the second wheels 12 (see figure 6 ).
  • the produced tightening force causes the reciprocal approaching of the wheels 11, 12 until tightening the interposed profiles 2, 2', driving the second wheel 12 in contact with the section of major thickness.
  • the same approaching force causes the relative tilting of the wheels 11, 12 around the hinge axis corresponding to the hinge 20 or to equivalent solutions, until reaching the contact with the peripheral surface of the wheels 11, 12 also on the other interposed section.
  • the resulting approaching force A which acts according to a direction passing through the centres of the fed profiles 2, 2', determines an instable balance, suitable to produce the relative rotation of the first wheels 11 and of the second wheels around the hinge axis when the shape of the section of the interposed profiles 2, 2' in the drawing assembly 1 is different and produces different and unbalanced drawing actions.
  • the device spontaneously tends to balance the support on both profiles 2, 2' for balancing the overall produced forces.
  • the transversal section of the same can vary, for example as shown in figures 7 and 8 .
  • the tightening performed by the actuation device 5 automatically determines the adjustment of the reciprocal inclination of the first wheels 11 and of the second wheels 12 to the different shapes of the sections which reach the drawing assembly.
  • the resulting force A of the actions produced on the wheels 12 assures the constant support on the profiles 2, 2' independently from the possible sudden variation of the interposed thickness.
  • the resulting force A is arranged preferably in a median plane among the vertical lines passing through the axes of the profiles 2, 2' (see figure 9 ), but in any case between them.
  • the counter-weight member 16 can be advantageously used for easing and perfectly balancing the tightening between the two profiles 2, 2' (see figure 10 ).
  • the metal profiles 2, 2' to be fed to the machine proceed side by side along the feeding line shaped by the first wheels 11 and the second counter-rotating wheels 12, resulting perfectly and constantly tightened in equal manner and therefore drawn of the same quantity.
  • the length of the tract of profile fed to the machine in such way does not depend on possible wear occurrences of the grooved of the drawing wheels or possible irregularities of the shape of the same profile, mechanical hindering, or other reasons of differences in the drawing force.
  • first and the second wheel or both can be indifferently tilting, as well as the one or the other can be the drawing one, therefore the tilting wheel can be idle, of simple contrast or drawing too.
  • the drawing assembly therefore reaches the aim of feeding in an independent way more than one metal profile to a machine for working such profiles, particularly making sure that the length of each profile fed to the machine is correct, when the machine works more than one metal profile at the same time.
  • the embodiment of the invention may vary depending on the requirements.

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

Claims (9)

  1. Ziehanordnung für Maschinen zum Bearbeiten eines Paares aus Metallprofilen (2, 2'), mindestens ein erstes Rad (11) und ein zweites gegenüberliegendes Rad (12) umfassend, das in einer Weise gegendreht, dass zwischen ihnen peripher ein Zufuhrweg für die zu ziehenden Profile (2, 2') definiert ist, mindestens ein Motorelement (14, 15), um mindestens ein Rad des ersten Rades (11) und des zweiten Rades (12) anzutreiben, ein erstes Stützgestell (3) für das erste Rad (11) und ein zweites Stützgestell (4) für das zweite Rad (12), wobei das zweite Rad (12) von einer Antriebsvorrichtung (5) zwischen einer beabstandeten Öffnungsposition und einer herangerückten Anzugsposition angetrieben wird, wobei das zweite Rad (12) hin zum ersten Rad (11) gedrückt wird, um die Profile (2, 2') anzuziehen, die mit einer entstehenden Anzugskraft (A) zugeführt werden, wobei die Anordnung dadurch gekennzeichnet ist, dass das erste Stützgestell (3) für das erste Rad (11) und das zweite Stützgestell (4) für das zweite Rad (12) derart montiert sind, dass sie im Verhältnis zueinander um eine Neigungsachse neigbar sind, die parallel zur Achse des Paares aus Profilen (2, 2') liegt, das in dem Zufuhrweg angeordnet ist, und die im Durchlassbereich der Profile (2, 2') angeordnet ist, um das relative Neigen des ersten Rades (11) und des zweiten Rades (12) im Verhältnis zur Neigungsachse mit einer Weite und in einer Richtung (+α, -α) derart zu ermöglichen, dass momentan und spontan differenzierte Schwankungen des Querschnitts der zugeführten Profile (2, 2') kompensiert werden, was die entstehende Anzugskraft (A) an beiden Profilen (2, 2') gleichmäßig verteilt hält.
  2. Ziehanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das erste Gestell (3) und das zweite Gestell (4) gleich oder äquivalent einem Gelenk (20), das schwenkbar an der Neigungs- oder Gelenkachse ist, durch eine kinetische Kette verbunden sind.
  3. Ziehanordnung nach Anspruch 2, dadurch gekennzeichnet, dass das das Gelenk (20) mittels eines ersten Kopplungsabschnitts (21), der vom ersten Gestell (3) geformt ist, und mittels eines zweiten Kopplungsabschnitts (22) hergestellt ist, der durch das zweite Gestell (4) geformt ist, wobei der erste Kopplungsabschnitt (21) und der zweite Kopplungsabschnitt (22) drehbar um die Gelenkachse verbunden sind, wobei der erste Kopplungsabschnitt (21) und der zweite Kopplungsabschnitt (22) jeweils einen röhrenförmigen Durchlass (23, 24) formen, der um die Gelenkachse angeordnet ist, um den Durchlass der Profile (2, 2') zu ermöglichen, die den Zufuhrweg entlang gezogen werden.
  4. Ziehanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das erste Gestell (3) feststehend und das zweite Gestell (4) zum ersten Gestell (3) um die Neigungsachse schwenkbar beweglich ist.
  5. Ziehanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie ein Gegengewichtselement (16) umfasst, das mindestens an dem zweite bewegliche Gestell (4) angewandt und durch Verbindungsmittel (17) mit einem feststehenden Abschnitt der Vorrichtung verbunden ist, wobei die Vorrichtung angewandt wird, um die Wirkungen zu kompensieren, die durch das Gewicht der Elemente ausgeübt wird, die Bestandteil des zweiten neigbaren Gestells (4) sind.
  6. Ziehanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Neigungsachse an einer Position angeordnet ist, die mittig zwischen dem Paar aus Profilen (2, 2') im Zufuhrweg liegt.
  7. Ziehanordnung nach Anspruch 2, dadurch gekennzeichnet, dass die kinetische Kette mehrere Gelenke umfasst, die äußerlich des Durchlassbereiches der in den Zufuhrweg eingesetzten Profile (2, 2') angeordnet sind, wobei die Gelenke in der Lage sind, eine entsprechende Mitte momentaner Drehung zu definieren, die faktisch zwischen selbigen Profilen im Durchlassbereich der Profile (2, 2') mittig liegt, so dass sie in der Lage sind, momentane Schwankungen des Querschnitts der durchlaufenden Profile spontan und in beiden Neigungsrichtungen zu kompensieren.
  8. Ziehanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Mittel zum Blockieren der relativen Neigung des ersten Gestells (3) und des zweiten Gestells (4) umfasst, um die spontane Kompensationsneigung zu blockieren und auf diese Weise die effiziente Verwendung der Anordnung mit nur einem der Profile (2, 2') im Zufuhrweg zu ermöglichen.
  9. Verfahren zum Ziehen eines Paares aus Profilen (2, 2') durch eine Ziehanordnung (1), die mindestens ein erstes Rad (11) und ein zweites gegenüberliegendes Rad (12) umfasst, das in einer Weise gegendreht, dass peripher ein Zufuhrweg für das Paar aus Profilen (2, 2') definiert wird, wobei die Ziehvorrichtung ferner ein erstes Stützgestell (3) für das erste Rad (11) und ein zweites Stützgestell (4) für das zweite Rad (12) umfasst, wobei die Gestelle (3, 4) im Verhältnis zueinander um eine Neigungsachse neigbar sind, die parallel zur Achse der zugeführten Profile (2, 2') liegt und im Durchlassbereich der Profile (2, 2') angeordnet ist, wobei das Ziehverfahren folgende Schritte umfasst:
    a. Voranordnen des ersten Rades (11) und des zweiten Rades (12) in einer wechselseitig beabstandeten Position durch den Antrieb einer Antriebsvorrichtung (5), die mit dem ersten Rad (11) und/oder dem zweiten Rad (12) verbunden ist,
    b. Voranordnen des Paares aus Profilen (2, 2') im Zufuhrweg, Einsetzen eines freien Endes der Profile (2, 2') zwischen das erste Rad (11) und das zweite Rad (12) in einer wechselseitig beabstandeten Position,
    c. Antreiben der Antriebsvorrichtung (5) zum Heranrücken des ersten Rades (11) relativ zum zweiten Rad (12) in einer Weise, dass sie mit einer entsprechenden entstehenden Anzugskraft (A) angezogen werden, die auf beide in den Zufuhrweg eingesetzte Profile (2, 2') gleichmäßig verteilt ist,
    d. Antreiben mindestens eines Motorelements (15, 16), das mit mindestens einem Rad des ersten Rades (11) und des zweiten Rades (12) verbunden ist, um das erste Rad (11) und das zweite Rad (12) in gegendrehender Weise in Drehung zu versetzen,
    e. Bewirken der Zufuhr des Paares aus Profilen (2, 2'), Aufrechterhalten des Antriebs der Antriebsvorrichtung (5), um das spontane und relative Neigen des ersten Gestells (3) im Verhältnis zum zweiten Gestell (4) zu erzeugen, das eine Weite und eine Richtung (+α, -α) aufweist, so dass momentane differenzierte Schwankungen des Querschnitts des Paares aus Profilen (2, 2') kontinuierlich kompensiert werden, und um die entstehende Anzugskraft (A) gleichmäßig auf das zugeführte Paar aus Profilen (2, 2')verteilt zu halten.
EP13704553.0A 2012-01-12 2013-01-11 Ziehanordnung in maschinen zur bearbeitung von metallprofilen und entsprechendes verfahren Active EP2802426B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000012A ITBO20120012A1 (it) 2012-01-12 2012-01-12 Gruppo di traino in macchine per lavorare profilati metallici
PCT/EP2013/050513 WO2013104773A1 (en) 2012-01-12 2013-01-11 Drawing assembly in machines for working metal profiles and corresponding method

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EP2802426B1 true EP2802426B1 (de) 2016-07-13

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IT202000023467A1 (it) * 2020-10-06 2022-04-06 M E P Macch Elettroniche Piegatrici Spa Gruppo e relativo metodo di traino per prodotti metallici

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BE412788A (de) *
US751141A (en) * 1904-02-02 Upsetting-machine
US3392896A (en) * 1966-11-03 1968-07-16 Amp Inc Wire feeding means
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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