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EP2755782B1 - Dispositif de correction de la forme d'une barre métallique pliée et procédé correspondant - Google Patents

Dispositif de correction de la forme d'une barre métallique pliée et procédé correspondant Download PDF

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Publication number
EP2755782B1
EP2755782B1 EP12758466.2A EP12758466A EP2755782B1 EP 2755782 B1 EP2755782 B1 EP 2755782B1 EP 12758466 A EP12758466 A EP 12758466A EP 2755782 B1 EP2755782 B1 EP 2755782B1
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EP
European Patent Office
Prior art keywords
segment
abutment element
abutment
disposed
bar
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.)
Active
Application number
EP12758466.2A
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German (de)
English (en)
Other versions
EP2755782A1 (fr
Inventor
Giorgio Del Fabro
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.)
MEP Macchine Elettroniche Piegatrici SpA
Original Assignee
MEP Macchine Elettroniche Piegatrici SpA
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Publication date
Application filed by MEP Macchine Elettroniche Piegatrici SpA filed Critical MEP Macchine Elettroniche Piegatrici SpA
Publication of EP2755782A1 publication Critical patent/EP2755782A1/fr
Application granted granted Critical
Publication of EP2755782B1 publication Critical patent/EP2755782B1/fr
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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
    • 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
    • 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
    • B21D3/10—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 between rams and anvils or abutments
    • 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
    • B21D3/14—Recontouring

Definitions

  • the present invention concerns a device to correct the shape of metal bars which have previously been bent, for example with at least one segment bent in a U shape on the main segment of the bar.
  • the device according to the present invention allows to align on a same plane both sides of the bar which have been bent on each other, and also the curved segment comprised between the two sides.
  • Bending machines are known used to bend metal bars, for example, but not exclusively, in order to make reinforcement stirrups, or bars suitably bent on themselves to define shaped profiles sometimes called special profiles and used for particular functions in the building sector.
  • substantially U-shaped bars are known, that is, bars having a first and second segment which are parallel or angled at an acute angle with respect to each other, and between which a curved segment is interposed which connects them.
  • bending machines are used that are provided with bending devices, for example of the type with a contrast pin or a hoe-shaped pin.
  • the bar to be bent is made to move forward toward the bending device making one of its first segments protrude by a desired length, equal to the length of the first bent segment to be obtained. Subsequently the bar is bent, by bending it around the contrast pin or hoe-shaped pin.
  • the elastic return of the metal bar it is necessary to command the bending device so that it bends the first segment by an angle greater than the one that is actually to be obtained between the first and the second segment.
  • the bending bench on which the bending device is disposed is generally provided with inclined planes which provide to divert the first segment vertically so that it overlaps the second during the bending operation.
  • first and second segment are inclined reciprocally with respect to each other by a determinate desired angle, which is different from the angle at which the two segments are disposed after the bending operation.
  • One purpose of the present invention is to make a device to correct the shape of metal bars which have been previously bent so as to obtain a final shaped profile with bent sides which are substantially coplanar with each other, or angled with respect to each other by a desired angle.
  • Another purpose of the present invention is to make a device to correct the shape of metal bars which is simple and economical to make, and which does not require complex operations to achieve the condition of planarity, or desired angle, between the segments which make up the bar.
  • Another purpose of the present invention is to make a device to correct the shape of bars which can be directly integrated on board machines for bending bars, whether these are new or already existing, simply and quickly, without requiring invasive interventions on the machine, without greatly increasing the bulk and without entailing important modifications to the work cycle.
  • Another purpose of the present invention is to perfect a method to correct the shape of metal bars which is simple, quick and which does not require complex operations.
  • Another purpose of the present invention is to perfect a method to correct the shape of metal bars which can be carried out directly on board the bending machine, and immediately following the bending of the bar.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a device to correct the shape of a bent metal bar according to the present invention is used to correct the reciprocal angle between a first and a second segment with respect to the curved segment which is interposed between the two.
  • the bent bar on which the device operates is provided with at least a first substantially straight segment, a second segment opposite the first segment and separated from it by a curved segment.
  • the first segment because of the bending processes to which it has been subjected, is diverted with respect to the plane on which the second segment and at least one portion of the curved segment lie.
  • the device comprises a first abutment element and a second abutment element disposed offset with respect to the first.
  • the first abutment element is suitable to interact and hold at least one portion of the curved segment and is provided with an abutment surface on which at least one portion of the second segment and of the curved segment are disposed.
  • the second abutment element is provided with a pressure element which, during use, is disposed above the first segment.
  • Translation means are associated with at least one of either the first abutment element or the second abutment element in order to translate at least one of these against the other.
  • the pressure element and the abutment surface deform the curved segment in order to render the first segment and the second segment substantially coplanar with respect to each other, or angled by a determinate angle with respect to the curved segment according to the application requirements.
  • the curved segment is permanently deformed, due to the action of the pressure element on the first segment.
  • the first abutment element comprises a housing element suitable to define a housing seating inside which at least one portion of the curved segment is inserted.
  • the above-mentioned housing element acts as a holding element during the step to correct the shaping of the bar.
  • the first abutment element comprises a first part and a second part disposed substantially orthogonal with respect to the first part.
  • the first part and the second part define the abutment surface. More specifically, the first part of the first abutment element acts as a support for the second segment of the bar, while the second part supports at least one portion of the curved segment.
  • the housing element is solidly associated, or made in a single body, with the second part, and that the abutment surface belongs at least partly to the housing seating.
  • the pressure element is disposed in correspondence with the concave zone defined between the first part and the second part of the first abutment element, so that the movement of the second abutment element can occur in the direction of the thickness of these two parts.
  • the correction device comprises a support pin which is associated with the first abutment element, and is normally disposed protruding with respect to the abutment surface.
  • the bar is disposed between the support pin and the second abutment element, in this way obliging it to remain in position during the bending steps.
  • the support pin is disposed through, through the first part of the first abutment element.
  • first translation means and second translation means are respectively associated with the first abutment element and the second abutment element in order to translate them independently from each other.
  • the present invention also concerns the connected method to correct the shape of a metal bar made with a device as described above.
  • the device to correct the shape of metal bars according to the present invention can also be applied to a bending machine which comprises means to feed the metal bar toward a bending device and shears in order to cut the bar to size.
  • a correction device to correct the shape of a metal bar B is indicated in its entirety by the reference number 10 and is directly associated with a bending machine 11 of a substantially known type.
  • the bending machine 11 comprises feed means 12, a bending bench 15, shears 13 to cut to size, and a bending device 14 to bend the bar B.
  • the feed means 12 provide to feed the bar B toward the bending device 14 which in its turn is suitable to obtain, in a known way, the bending of the bar B.
  • the bar B is bent so as to define at least a first rectilinear segment 16, a second rectilinear segment 17, adjacent to the first segment 16, and a curved segment 18 interposed between the first segment 16 and the second segment 17.
  • the curved segment 18 of the bar B can assume different configurations as shown in figs. 7 - 11 , for example U-shaped ( figs. 8 and 10 ), shaped like a partially closed arc of a circle ( figs. 7 and 11 ), or with a portion shaped transverse to the main direction of extension of the bar B ( fig. 9 ).
  • the shears 13 are provided with planes 22 inclined toward their central part so that when the first segment 16 is bent, it overlaps the second segment 17, preventing problems of interference with the latter.
  • the presence of the inclined planes 22, during bending, generates a diversion of the first segment 16 of the bar B, which makes it not coplanar with the second segment 17.
  • the correction device 10 is disposed downstream of the bending device 14, and is suitable to correct the angle between the first segment 16, the second segment 17 and the curved segment 18 which connects them.
  • the correction device 10 ( fig. 2 ) according to the present invention comprises at least a first abutment element 25, a second abutment element 26 which can be translated with respect to the first abutment element 25, and a support pin 27 associated to the first abutment element 25 and, in this case, solidly movable together with the second abutment element 26.
  • the first abutment element 25 is suitable to at least partly support a first end portion 29 of the second segment 17 and at least a second portion 30 of the curved segment 18 directly connected to the first end portion 29.
  • the first abutment element 25 is substantially L-shaped, that is, it has a first part 32 and a second part 33 disposed substantially orthogonal with respect to the first part 32, and is provided with an abutment surface 35 on which, during use, the first end portion 29 of the second segment 17 and the second portion 30 of the curved segment 18 are rested.
  • the abutment surface 35 is always disposed, on each occasion, substantially parallel to the bending bench 15.
  • a housing element 36 is solidly associated to the second part 33 of the first abutment element 25, and is suitable to define, together with the abutment surface 35, a housing seating 37 inside which, during use, at least the second portion 30 of the curved segment 18 is disposed.
  • the first abutment element 25 is associated to first translation means 39 which provide to translate it vertically, and make the first abutment element 25 protrude with respect to the bending bench 15, or completely retracted with respect thereto.
  • the second abutment element 26 is disposed in proximity to the end of the second segment 33 of the first abutment element 25 and comprises a support body 40 to which a pressure element 41 is solidly associated.
  • the pressure element 41 is disposed in correspondence to the concave zone defined between the first part 32 and the second part 33 of the first abutment element 25, and is selectively translated parallel to the thickness of the latter two, that is, in the direction indicated by the arrow F in fig. 2 .
  • the pressure element 41 is provided with a contrast surface 45 which, during the movement of the second abutment element 26, is brought into contact with the first segment 16.
  • second translation means 42 are solidly associated to the support body 40, and are independent with respect to the first translation means 39, which provide to translate the second abutment element 26 orthogonally with respect to the bending bench 15.
  • the support pin 27 is disposed through and in proximity to the center line of the first part 32 of the first abutment element 25.
  • the support pin 27 is selectively movable independently of the first abutment element 25 and in coordination with the second abutment element 26.
  • the support pin 27 can be provided with independent movement means with respect to the second translation means 42 or, in other forms of embodiment, the second translation means themselves 42 provide to move both the second abutment element 26 and the support pin 27.
  • Support elements 43 ( fig. 1 ), in this case two, are provided to support the bar B which is bent during the movements along the bending bench 15.
  • a first support element 43 is interposed between the bending device 14 and the correction device 10, while a further support element 43 is disposed immediately downstream of the latter.
  • Both the support elements 43 can be selectively translated in order to be taken to a first operating condition, protruding with respect to the bending bench 15, and to a second operating condition, retracted into the bending bench 15.
  • the shears 13 ( fig. 1 ), disposed between the movement means 12 and the bending device 14, provide to cut the bar B to size once it has been bent and the operation to correct the shape of its segments has been carried out.
  • the bending bench 15 is disposed in this case substantially vertical, or in any case inclined, so that the bent bar B, once all the operations to bend it and correct the shape have been carried out, can be discharged from the bending machine 11 due to the effect of gravity.
  • the correction device 10 to correct the shape thereof is disposed in a non-operating condition, retracted with respect to the bending bench 15, so as not to generate interference with the movements of the bar B.
  • the correction device 10 and therefore the first 25 and the second 26 abutment elements are brought into their first operating condition, protruding with respect to the bending bench 15 so as to dispose at least the abutment surface 35 substantially coplanar with the bending bench 15 ( fig. 3 ).
  • the second abutment element 26 is positioned protruding with respect to the bending bench 15 by a first distance L, raised with respect to the first abutment element 25 so as to allow the passage of the bar B below the pressure element 41, without problems of interference.
  • the bar B provides to feed the bar B so as to insert at least the second portion 30 of the curved segment 18 inside the housing seating 37 and position both the first end portion 29 and the second portion 30 on the abutment surface 35 of the first abutment element 25.
  • the second abutment element 26 is taken into a second work condition, protruding from the bending bench 15 by a determinate second distance D, greater than the first distance L.
  • the first translation means 39 translate the first abutment element 25 toward the second abutment element 26.
  • the bar B which with its second segment 17 and the curved segment 18 rests on the abutment surface 35, and respectively inserted into the housing seating 37, is also translated vertically.
  • the entity of the translation of the first abutment element 25 is such as to exert a pressure action by the pressure element 41 on the first segment 16 able to align the latter with the second segment 17, or to angle it with respect to it by a determinate angle.
  • the abutment surface 35 of the first abutment element 25 is taken at least to a height equal to or higher than that of the contrast surface 45 of the pressure element 41, in relation to the bending bench 15.
  • the entity of the second distance D is also such that the end of the first segment 16, during the pressure action exerted by the pressure element 41, does not interfere with the bending bench 15, which in its turn would determine an undesired deformation of the bar B.
  • the feed means 12 provide to release the bar B from correction device 10 and thus allow the removal of the bar B by shearing it with the shears 13.
  • the correction device 10 can be taken into its non-operating condition, retracted with respect to the bending bench 15.
  • the support pin 27 provides to keep the bar B in the desired position, that is, with at least the curved segment 18 cooperating with the housing seating 37, even during the operations to lift the bar B.
  • the correction device 110 according to the present invention ( fig. 12 ) has the first contrast element 25 provided only with the second part 33, to which the housing element 36 is directly integrated.
  • the housing element 36 is provided with the abutment surface 35 which carries out the same function as described above.
  • the housing seating 37 allows the second segment 17 of the bar B to be inserted through it, while a portion of the curved segment 18 and the first segment 16 protrude from the housing seating 37.
  • the second abutment element 26 acts directly on the first segment 16 by means of the pressure element 41.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (12)

  1. Dispositif pour corriger la forme d'une barre métallique déformée (B), ladite barre (B) étant pourvue d'au moins un premier segment sensiblement rectiligne (16), d'un second segment sensiblement droit (17) qui est opposé au premier segment (16), séparé de lui par un segment courbe (18), ledit premier segment (16) étant dévié par rapport au plan sur lequel se situent ledit second segment (17) et au moins une portion dudit segment courbe (18), caractérisé en ce qu'il comporte un premier élément de butée (25), adapté pour maintenir sélectivement ledit segment courbe (18) et pourvu d'une surface de butée (35) sur laquelle, en utilisation, au moins une portion dudit second segment (17) et dudit segment courbe (18) est reçue, et un second élément de butée (26) qui est décalé par rapport audit premier élément de butée (25) et pourvu d'un élément de pression (41) qui, pendant l'utilisation, est disposé au-dessus dudit premier segment (16), des moyens de translation (39, 42) étant associés au moins à l'un ou l'autre parmi ledit premier élément de butée (25) ou ledit second élément de butée (26) afin de déplacer en translation au moins l'un de ceux-ci contre l'autre, de sorte que ledit élément de pression (41) et ladite surface de butée (35) déforment ledit segment courbe (18).
  2. Dispositif selon la revendication 1, caractérisé en ce que ledit premier élément de butée (25) comporte un élément de réception (36) adapté pour définir un appui de réception (37) adapté pour maintenir au moins une portion dudit segment courbe (18).
  3. Dispositif selon la revendication 2, caractérisé en ce que ledit premier élément de butée (25) comporte une première partie (32) et une seconde partie (33) disposée sensiblement orthogonale à la première partie (32), ladite première partie (32) et ladite seconde partie (33) définissant ladite surface de butée (35).
  4. Dispositif selon la revendication 3, caractérisé en ce que ledit élément de pression (41) est disposé en correspondance avec la zone concave définie entre ladite première partie (32) et ladite seconde partie (33) du premier élément de butée (25).
  5. Dispositif selon l'une quelconque des revendications ci-dessus, caractérisé en ce qu'une goupille de support (27) est associée audit premier élément de butée (25), et est disposée normalement et en faisant saillie par rapport à ladite surface de butée (35), et en ce que ladite barre (B) est disposée entre ladite goupille de support (27) et ledit second élément de butée (26).
  6. Dispositif selon les revendications 3 et 5, caractérisé en ce que ladite goupille de support (27) est disposée à travers ladite première partie (32) du premier élément de butée (25).
  7. Dispositif selon l'une quelconque des revendications ci-dessus, caractérisé en ce que des premiers moyens de translation (39) et des seconds moyens de translation (42) sont respectivement associés audit premier élément de butée (25) et audit second élément de butée (26) afin de les déplacer en translation de manière indépendante l'un de l'autre.
  8. Procédé pour corriger la forme d'une barre métallique (B), comportant au moins une étape de déformation pendant laquelle ladite barre métallique (B) est déformée pour définir au moins un premier segment sensiblement rectiligne (16), un second segment sensiblement droit (17) qui est opposé au premier segment et séparé de lui par un segment courbe (18), ledit premier segment (16) étant dévié par rapport à un plan commun dudit second segment (17) et au moins une portion dudit segment courbe (18), caractérisé en ce qu'il comporte au moins une étape ultérieure pour corriger la forme entre ledit premier segment (16), ledit second segment (17) et ledit segment courbe (18) au moyen d'un dispositif de correction (10), ladite étape de correction fournissant au moins une sous-étape consistant à maintenir au moins une portion du segment courbe (18) au moyen d'un premier élément de butée (25) pourvu d'une surface de butée (35) sur laquelle au moins une portion du second segment (17) est disposée, une sous-étape consistant à positionner un élément de pression (41), un second élément de butée (25) qui est disposé décalé par rapport au premier élément de butée (25), au-dessus du premier segment (16), et une sous-étape pendant laquelle au moins l'un ou l'autre parmi ledit premier élément de butée (25) ou ledit second élément de butée (26) est déplacé en translation contre l'autre de sorte que ledit élément de pression (41), agissant sur ledit premier segment (16), déforme ledit segment courbe (18).
  9. Procédé selon la revendication 8, caractérisé en ce que ladite étape de correction de la forme fournit au moins une première sous-étape pendant laquelle ladite barre métallique (B) est transférée vers ledit dispositif de correction (10) le long d'un plan d'alimentation (15), ladite surface de butée (35) du premier élément de butée (25) étant disposée sensiblement parallèle audit plan d'alimentation (15), et une seconde sous-étape dans laquelle ledit dispositif de correction (10) est déplacé verticalement en translation de sorte qu'il fait saillie à partir dudit plan d'alimentation (15).
  10. Procédé selon la revendication 9, caractérisé en ce qu'après ladite seconde sous-étape, ledit premier élément de butée (25) est déplacé en translation vers ledit élément de pression (41), de sorte que ce dernier exerce une pression sur ledit premier segment (16).
  11. Machine pour déformer au moins une barre métallique (B) comportant au moins des moyens (12) pour transférer ladite barre métallique (B) vers un dispositif de déformation (14) et des cisailles (13) pour cisailler ladite barre (B) aux dimensions requises, ledit dispositif de déformation (14) étant prévu afin de déformer ladite barre métallique (B) et de définir au moins un premier segment (16), un second segment (17) adjacent au premier segment (16), et un segment courbe (18), interposé entre ledit premier segment (16) et ledit second segment (17), ledit premier segment (16) étant dévié par rapport au plan sur lequel se situent ledit second segment (17) et au moins une portion dudit segment courbe (18), caractérisée en ce qu'elle comporte également un dispositif pour corriger la forme de ladite barre métallique (B) selon l'une quelconque des revendications 1 à 7.
  12. Machine selon la revendication 11, caractérisée en ce que ledit dispositif de correction (10) est disposé en aval du dispositif de déformation (14) et en ce que lesdits moyens de déplacement sont adaptés pour déplacer ladite barre (B) à partir dudit dispositif de correction (10) et vers celui-ci.
EP12758466.2A 2011-09-13 2012-09-10 Dispositif de correction de la forme d'une barre métallique pliée et procédé correspondant Active EP2755782B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000143A ITUD20110143A1 (it) 2011-09-13 2011-09-13 Dispositivo di correzione della sagoma di una barra metallica piegata e relativo procedimento di correzione della sagoma
PCT/EP2012/067633 WO2013037725A1 (fr) 2011-09-13 2012-09-10 Dispositif de correction de la forme d'une barre métallique pliée et procédé correspondant

Publications (2)

Publication Number Publication Date
EP2755782A1 EP2755782A1 (fr) 2014-07-23
EP2755782B1 true EP2755782B1 (fr) 2015-12-16

Family

ID=44899237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12758466.2A Active EP2755782B1 (fr) 2011-09-13 2012-09-10 Dispositif de correction de la forme d'une barre métallique pliée et procédé correspondant

Country Status (6)

Country Link
EP (1) EP2755782B1 (fr)
CN (1) CN103930221B (fr)
BR (1) BR112014005696B1 (fr)
DK (1) DK2755782T3 (fr)
IT (1) ITUD20110143A1 (fr)
WO (1) WO2013037725A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531972A (en) * 1968-07-29 1970-10-06 Clarence O Smith Rod straightening apparatus
IT1235175B (it) * 1989-01-18 1992-06-23 Piegatrici Macch Elettr Gruppo piegatore basculante.
DE9313601U1 (de) * 1993-09-09 1993-11-11 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 70327 Stuttgart Richtvorrichtung
CN2248103Y (zh) * 1995-03-21 1997-02-26 机械工业部西安重型机械研究所 金属管棒材框式校直机
US7188504B2 (en) * 2000-02-21 2007-03-13 Ateliers De Constructions Mecaniques Latour Et Fils Wire bending device
GR1005871B (el) * 2006-05-04 2008-04-15 Μεθοδος και μηχανισμος παραγωγης τρισδιαστατων τσερκιων.
IT1391412B1 (it) * 2008-10-15 2011-12-23 Schnell Spa Metodo e apparecchiatura per realizzare armature a spirale per cemento armato
CN101642785A (zh) * 2009-06-24 2010-02-10 沈群华 一种用于金属杆矫直的装置

Also Published As

Publication number Publication date
CN103930221B (zh) 2016-06-29
DK2755782T3 (en) 2016-03-21
WO2013037725A1 (fr) 2013-03-21
EP2755782A1 (fr) 2014-07-23
ITUD20110143A1 (it) 2013-03-14
BR112014005696A2 (pt) 2017-06-13
CN103930221A (zh) 2014-07-16
BR112014005696B1 (pt) 2020-07-14

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