EP0648577A1 - Appareil pour le faconnage de barres en particulier des barres pour beton armé - Google Patents

Appareil pour le faconnage de barres en particulier des barres pour beton armé Download PDF

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Publication number
EP0648577A1
EP0648577A1 EP94830485A EP94830485A EP0648577A1 EP 0648577 A1 EP0648577 A1 EP 0648577A1 EP 94830485 A EP94830485 A EP 94830485A EP 94830485 A EP94830485 A EP 94830485A EP 0648577 A1 EP0648577 A1 EP 0648577A1
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EP
European Patent Office
Prior art keywords
bars
bed
bending
longitudinal direction
bending machines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94830485A
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German (de)
English (en)
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EP0648577B1 (fr
Inventor
Renzo Peruzzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oscam SpA
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Oscam SpA
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Publication date
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Publication of EP0648577A1 publication Critical patent/EP0648577A1/fr
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Publication of EP0648577B1 publication Critical patent/EP0648577B1/fr
Anticipated expiration legal-status Critical
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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
    • 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
    • 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

Definitions

  • the present invention relates to apparatus for shaping bars, particularly bars of reinforced concrete, of the type comprising an elongated bed for supporting bars and a first and a second bending machines movable relative to each other along a direction parallel to the bed, adjacent to one side thereof, each bending machine having a bending device comprising a driven rotatable horizontal disk with a central pin and an offset pin and a fixed support element.
  • the bars to be shaped are fed above the bed and then subsequently picked up therefrom and positioned with their end portions resting on the two horizontal rotatable disks of the two bending machines.
  • the position in the longitudinal direction of the bar to be shaped with respect to the two bending machines is determined by the abutment of one end of the bar against a fixed stop element provided on one of the two bending machines.
  • the two machines are located at a distance from each other corresponding to the position of the bends to be carried out on the bar.
  • the two machines are positioned so that when the bar is laid down on the two rotatable disks of the bending machines, the two central pins of these disks are located at the bending regions.
  • the two disks are then activated simultaneously so as to carry out the two end bendings by the offset pins, whereas the portion of the bar adjacent to each end portion is prevented from moving by the central pin and said support element, which are in contact with the bar on opposite sides thereof and at two regions thereof which are spaced apart from each other.
  • the two machines are located at the corresponding distance (once the rotatable disks are returned to their starting positions) and the two disks are again activated to carry out the second bend.
  • the whole cycle of operations which has been described above is automated with the aid of a computer which automatically controls the displacement of the bending machines and the rotation of their rotatable disks as a function of a predetermined program, corresponding to the specific geometry of the shaped bar which is to be obtained.
  • the bars to be shaped were picked up from the bed and positioned above the bending machines manually. This required some effort and lost of time for the operators.
  • the bed is provided with a plurality of liftable supports which raise the bars received on the bed with respect to the plane thereof. These supports had the configuration of brackets projecting transversally to the bed in the direction of the side thereof facing the bending machines. When the supports were lifted, the operator could then obtain the positioning of the bar above the bending machines by causing the bar to roll on said supports until it fell down on the bending machine. Thus, the effort necessary for lifting the bar was avoided by the operators.
  • the object of the present invention is that of providing an apparatus which keeps all the advantages of the known apparatus described above and which at the same time is able to solve all the above mentioned inconveniences satisfactorily.
  • the invention provides an apparatus for shaping bars, particularly bars of reinforced concrete, comprising: an elongated bed for supporting the bars, a first and a second bending machines movable relative to each other along a direction parallel to the bed, adjacent to one side thereof, each bending machine having a bending device including a driven rotatable horizontal disk, having a central pin and an offset pin, and a fixed support element, characterized in that said apparatus further comprises: support means for supporting the bars arranged on the side of the bed facing the two bending machines at a height not greater than the upper planar surface of the bed and defining bar containing slots, opened upwardly, able to receive more bars superimposed on each other in a vertical plane parallel to the longitudinal direction of the bed, and means for loading automatically the bars on the bending machines, comprising at least a bar gripping member movable between a position for picking up the bars from said support means and a position for unloading the bars above the bending machines.
  • the support element provided on each bending machine is able to assume two different operating positions located on opposite sides with respect to a plane including the axes of the two rotatable disks of the bending machines (each operating position being on its turn adjustable along a direction transverse to said plane to allow adaptation to different possible diameters of the central pin).
  • said means for automatic loading are also used to lift temporarily the bars over the bending machines during the time necessary to re-position said support element. The productivity of the machine is therefore further improved with respect to the machines of the prior art.
  • a gripping member is provided associated with each bending machine and a further gripping member is associated with a fixed structure arranged between the two bending machines, so that the bars are always gripped at three regions through their length.
  • each gripping member is comprised of a gripping device carried by a sliding element movable vertically with respect to a carriage which is movable horizontally along a direction transverse with respect to the longitudinal direction of the bed.
  • Said slot support means are further preferably comprised of brackets projecting from the side of the bed facing the bending machines and movable along the longitudinal direction of the bed. The movement of said brackets is driven by any device of known type and is controlled by a computer, with the aid of position sensing devices, on the basis of the features of the bars to be shaped.
  • one of said support brackets is also provided with an abutment plane for the ends of the bars, which defines a reference plane for the proper positioning of the bars along the longitudinal direction.
  • the positioning of the bracket carrying this plane is also automatically controlled by the computer, with the aid of a position sensing device. In this manner, it is possible to eliminate the reference plane provided, according to the prior art, on one of the two bending machines and no manual measuring operations are necessary any longer to position said reference plane properly.
  • reference numeral 1 generally designates a bed having an upper planar surface 2 which is for receiving a plurality of bars 3.
  • the surface 2 may be provided with rollers to make the longitudinal advancing movement of the bars 3 on the bed when they are fed thereto.
  • the embodiment shown relates to the case in which both bending machines 4 are movable.
  • the invention is theoretically applicable even to the case in which one of the two bending machines is fixed, since what is essential is the possibility to adjust the distance between the two machines 3.
  • each bending machine 4 comprises an upper planar surface 6 on which there is arranged a driven rotatable horizontal disk 7 having a central pin 8 and an offset pin 9, as well as a flat support element 10 which is able to assume two different operating positions, both adjustable, on the upper planar surface 6, as it will be described in detail in the following.
  • brackets 12, 13 adjustable in position along the longitudinal direction of the bed and a support bracket 14 fixed to the bed at the central region thereof. All said support brackets have vertical slots 12a, 13a, 14a opened upwardly, aligned with each other and adapted to receive and support one or more bars 3 superimposed on each other in a vertical plane parallel to the longitudinal direction of the bed.
  • the upper surfaces of brackets 12, 13, 14 are arranged in the same plane, or in a plane lowered with respect to the upper planar surface 2 of the bed, so that bars 3 may be loaded in the slots 12a, 13a, and 14a by making them roll on the planar surface 2 until they fall down within said slots.
  • the support brackets 12 and 13 are adjustable in position to adapt to different possible lengths of bar 3, whereas one of the two brackets 13, and precisely that arranged closer to the corresponding end of bed 1 is also provided with a reference plate 13b transverse to the longitudinal direction of the bed 1, which is to define a reference for one end of the bars, so to allow the proper positioning along the longitudinal direction of the bars on the support brackets.
  • each bending machine 4 is provided, on its side facing the other bending machine 4 with a support structure 15, fixed to the frame of the bending machine and provided with rails (not shown) for a carriage 16 movable with respect to the support structure 15 along a horizontal direction transverse to the longitudinal direction of bed 1.
  • the movement of carriage 16 is driven by a chain 17 (shown only diagrammatically in figure 2) which is controlled by an electric motor.
  • the electric motors which driven all the movements of the various parts of the apparatus are controlled by a computer on the basis of a predetermined program which is defined as a function of the particular geometry to be given to the shaped bar. This applies of course also to the electric motor (not shown) which drives the chain 17.
  • angular position sensing devices which are able to supply an electronic control unit with the information on the position reached by each movable part.
  • FIG. 3 diagrammatically shows the path followed by slide 19 in an operating cycle.
  • Position 1 is the position assumed immediately before that the bars are picked up from the support brackets 12, 13, 14.
  • Position 2 is that reached as a result of the lifting movement of slide 19 by which the latter picks up the bars from support brackets 12, 13, 14.
  • Position 3 is that assumed as a result of the movement along a direction transverse to the longitudinal direction of the bars and position 4 is that for unloading the bars above the bending machines.
  • the fixed support element 10 is displaceable along a direction 50 so that it can assume two different operating positions located on opposite sides with respect to a plane including the axes of the two rotatable disks 7 of the two bending machines 4.
  • the bending machines may be arranged to carry out bendings in both directions without requiring a rotation of the bars around their axes over 180 degrees once a bending in one direction has been carried out, in order to carry out a bending in the opposite direction.
  • This feature which will become even more apparent from the following description with reference to figures 5A-5E, which show a bar bending cycle, becomes extremely advantageous when one wishes to bend simultaneously many bars superimposed on each other.
  • each of said two operating positions is adjustable to allow adaptation to different diameters of the fixed pin.
  • an originally linear bar (or more bars superimposed on each other) is/are arranged on the two bending machines 4 which are activated to carry out the first end bends, at 90 degrees, at the end portions 3a.
  • the rotatable disks 7 are brought again in their starting position and the bending machines 4 are moved closer in the position shown in figure 5B to carry out a second bend and 90 degrees of a second portion 3b adjacent to each end portion 3a.
  • a third bend which is carried out in the same direction at two further portions 3c of the bar adjacent to the portions 3b and displaced towards the center of the bar with respect to portion 3b.
  • the gripping members formed by slides 19 are again activated to pick up the bar or bars 3 from the rotatable disks 7 and to lift them over the latter.
  • the support elements 10 are positioned in positions symmetrical with respect to said plane including the axes of the two rotatable disks and the latter are arranged in the positions adapted to carry out the bend in the opposite direction, as shown in figure 5D.
  • shapes of the type shown in figure 5E which have bends in the two opposite directions, do not require the operator to rotate the bar around its axis over 180 degrees once the bends in a same direction have been carried out, before carrying out the bends in the opposite direction.
  • the preferred embodiment of the invention which is described herein, also comprises a third slide 19 which is exactly similar to slides 19 associated with the two bending machines 4, but is guided on a support structure 30 fixed to the bed 11 in a central position with respect to the length thereof.
  • the apparatus allows an automatic and rapid loading of the bars to be shaped on the bending machines without requiring the manual intervention of the apparatus and nullifying the dead times which are typical of the known apparatus.
  • the apparatus is also able to perform bendings in opposite directions on a same bar without requiring the intervention of the operator and without requiring a rotation of the bar around its axis during the operating cycle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Wire Processing (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP94830485A 1993-10-19 1994-10-13 Appareil pour le faconnage de barres en particulier des barres pour beton armé Expired - Lifetime EP0648577B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930774A IT1260998B (it) 1993-10-19 1993-10-19 Impianto per la sagomatura di barre, particolarmente barre di cemento armato.
ITTO930774 1993-10-19

Publications (2)

Publication Number Publication Date
EP0648577A1 true EP0648577A1 (fr) 1995-04-19
EP0648577B1 EP0648577B1 (fr) 1997-03-26

Family

ID=11411810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830485A Expired - Lifetime EP0648577B1 (fr) 1993-10-19 1994-10-13 Appareil pour le faconnage de barres en particulier des barres pour beton armé

Country Status (4)

Country Link
EP (1) EP0648577B1 (fr)
DE (1) DE69402284T2 (fr)
ES (1) ES2101477T3 (fr)
IT (1) IT1260998B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0835702A1 (fr) * 1996-10-11 1998-04-15 OSCAM S.p.A. Dispositif de coupe et de mise en forme de barres en acier, notamment de barres de renforcement pour béton armé
EP1184099A1 (fr) * 2000-08-29 2002-03-06 OSCAM S.p.A. Machine de pliage de barres métalliques avec une table de support variable en longueur
AU778830B2 (en) * 2000-05-31 2004-12-23 Natsteel Asia Pte Ltd Automated bar bender
EP2374553A1 (fr) * 2010-04-12 2011-10-12 OSCAM S.p.A. Dispositif et procédé de cintrage de barres avec alimentation automatique des barres
JP2011235329A (ja) * 2010-05-12 2011-11-24 Kyadakku:Kk 鉄筋の曲げ加工装置
ITTO20120083A1 (it) * 2012-02-01 2013-08-02 Oscam Spa Impianto di piegatura di barre metalliche
ITBO20120505A1 (it) * 2012-09-21 2014-03-22 Dante Bruno Priuli Apparecchiatura per la piegatura di profilati metallici in barre
WO2014045239A1 (fr) 2012-09-21 2014-03-27 Schnell S.P.A. Procédé et appareil permettant de plier des tiges de métal en barres
ITBO20130159A1 (it) * 2013-04-10 2014-10-11 Dante Bruno Priuli Metodo e apparecchiatura per la piegatura di profilati metallici in barre
CN111872182A (zh) * 2020-07-25 2020-11-03 李亚龙 一种建筑施工用的液压弯管机
WO2021068044A1 (fr) * 2019-10-10 2021-04-15 Kirov Valentin Todorov Machine automatique et procédé de fabrication d'ébauches de renforcement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451786A1 (fr) * 1979-03-23 1980-10-17 Kajima Corp Procede et appareil pour la preparation continue d'armatures pour beton arme
GB2169829A (en) * 1985-01-17 1986-07-23 Usui Kokusai Sangyo Kk Multiple bending of tube
US4681210A (en) * 1984-08-23 1987-07-21 Kabushiki Kaisha Komatsu Seisakusho Apparatus for feeding bars through a bending or like processing station
FR2615131A1 (fr) * 1987-05-11 1988-11-18 Oscam Spa Machine pour le pliage des ronds ou autres elements metalliques analogues
EP0419441A1 (fr) * 1989-09-20 1991-03-27 EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H. Appareil de pliage pour barres de fer à béton

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451786A1 (fr) * 1979-03-23 1980-10-17 Kajima Corp Procede et appareil pour la preparation continue d'armatures pour beton arme
US4681210A (en) * 1984-08-23 1987-07-21 Kabushiki Kaisha Komatsu Seisakusho Apparatus for feeding bars through a bending or like processing station
GB2169829A (en) * 1985-01-17 1986-07-23 Usui Kokusai Sangyo Kk Multiple bending of tube
FR2615131A1 (fr) * 1987-05-11 1988-11-18 Oscam Spa Machine pour le pliage des ronds ou autres elements metalliques analogues
EP0419441A1 (fr) * 1989-09-20 1991-03-27 EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H. Appareil de pliage pour barres de fer à béton

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0835702A1 (fr) * 1996-10-11 1998-04-15 OSCAM S.p.A. Dispositif de coupe et de mise en forme de barres en acier, notamment de barres de renforcement pour béton armé
AU778830B2 (en) * 2000-05-31 2004-12-23 Natsteel Asia Pte Ltd Automated bar bender
EP1184099A1 (fr) * 2000-08-29 2002-03-06 OSCAM S.p.A. Machine de pliage de barres métalliques avec une table de support variable en longueur
EP2374553A1 (fr) * 2010-04-12 2011-10-12 OSCAM S.p.A. Dispositif et procédé de cintrage de barres avec alimentation automatique des barres
ITTO20100279A1 (it) * 2010-04-12 2011-10-13 Oscam Spa Impianto per la piegatura di barre metalliche con caricamento automatico delle barre, e metodo di caricamento utilizzato in tale impianto
JP2011235329A (ja) * 2010-05-12 2011-11-24 Kyadakku:Kk 鉄筋の曲げ加工装置
ITTO20120083A1 (it) * 2012-02-01 2013-08-02 Oscam Spa Impianto di piegatura di barre metalliche
EP2623227A1 (fr) * 2012-02-01 2013-08-07 OSCAM S.p.A. Installation pour le cintrage de barres métalliques
ITBO20120505A1 (it) * 2012-09-21 2014-03-22 Dante Bruno Priuli Apparecchiatura per la piegatura di profilati metallici in barre
WO2014045239A1 (fr) 2012-09-21 2014-03-27 Schnell S.P.A. Procédé et appareil permettant de plier des tiges de métal en barres
ITBO20130159A1 (it) * 2013-04-10 2014-10-11 Dante Bruno Priuli Metodo e apparecchiatura per la piegatura di profilati metallici in barre
WO2021068044A1 (fr) * 2019-10-10 2021-04-15 Kirov Valentin Todorov Machine automatique et procédé de fabrication d'ébauches de renforcement
CN114514079A (zh) * 2019-10-10 2022-05-17 瓦连京·托多罗夫·基洛夫 用于生产加强型坯件的自动化机器和方法
US11712728B2 (en) 2019-10-10 2023-08-01 Valentin Todorov Kirov Automatic machine and method for producing reinforcement blanks
CN114514079B (zh) * 2019-10-10 2023-08-08 瓦连京·托多罗夫·基洛夫 用于生产加强型坯件的自动化机器和方法
CN111872182A (zh) * 2020-07-25 2020-11-03 李亚龙 一种建筑施工用的液压弯管机

Also Published As

Publication number Publication date
EP0648577B1 (fr) 1997-03-26
IT1260998B (it) 1996-04-29
DE69402284T2 (de) 1997-10-09
ES2101477T3 (es) 1997-07-01
ITTO930774A0 (it) 1993-10-19
DE69402284D1 (de) 1997-04-30
ITTO930774A1 (it) 1995-04-19

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