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EP1331050B1 - Dispositif d'expulsion pour barres ou segments de barres - Google Patents

Dispositif d'expulsion pour barres ou segments de barres Download PDF

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Publication number
EP1331050B1
EP1331050B1 EP03001425A EP03001425A EP1331050B1 EP 1331050 B1 EP1331050 B1 EP 1331050B1 EP 03001425 A EP03001425 A EP 03001425A EP 03001425 A EP03001425 A EP 03001425A EP 1331050 B1 EP1331050 B1 EP 1331050B1
Authority
EP
European Patent Office
Prior art keywords
bars
bar
segments
expulsion
thruster
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.)
Expired - Lifetime
Application number
EP03001425A
Other languages
German (de)
English (en)
Other versions
EP1331050A1 (fr
Inventor
Giorgio Del Fabro
Marcello 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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MEP Macchine Elettroniche Piegatrici SpA filed Critical MEP Macchine Elettroniche Piegatrici SpA
Publication of EP1331050A1 publication Critical patent/EP1331050A1/fr
Application granted granted Critical
Publication of EP1331050B1 publication Critical patent/EP1331050B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • B21D43/28—Associations of cutting devices therewith
    • B21D43/282—Discharging crop ends or the like

Definitions

  • the invention concerns an expulsion device for segments of bars, also called off-cuts, left over from the shearing and bending of bars pre-sheared to size, or as terminal parts of a roll.
  • the invention is applied in particular on machines for the bending and shaping of bars able to form stirrups, or other shaped elements for reinforcement purposes.
  • the invention comprises expulsion means cooperating with a shears and/or the rollers of a drawing assembly which feeds the bars towards a bending assembly located downstream of the shears, (see for example EP-A-0 374 465 ).
  • bending machines for straight bars able to shape stirrups, or other shaped reinforcement elements; such machines substantially consist of a drawing assembly, for example with rollers, able to feed the bars towards a bending assembly, and a shears, located between the drawing assembly and the bending assembly, able to shear the shaped bars to take them to the size corresponding to the linear development of the segments to be formed.
  • Conventional expulsion devices normally consist of at least a pair of ejector rollers which are able to intervene after shearing, so that the off-cut is discharged axially, thus freeing the shears and the drawing assembly.
  • the ejector rollers may not be able to intervene.
  • Another shortcoming is that when it is necessary to discharge the bar rapidly from the machine, due to any malfunctioning thereof, the ejector rollers are not able to perform this operation quickly and efficiently, thus causing long downtimes and slowing down the functioning of the machine.
  • Purpose of the invention is to achieve an expulsion device for bars or segments of bars in bending machines, in order to make stirrups or other shaped elements, wherein the bars or segments of bars are discharged in such a fashion that, once discharged, the segments of bars do not interfere with the correct functioning of the machine and do not entail risks for the operator.
  • Another purpose of the present invention is to achieve an expulsion device able to act even on very small segments of bar.
  • the expulsion device comprises expulsion means movable in a direction substantially orthogonal to the axis on which the bar advances, and cooperating at least with the shearing assembly arranged upstream of the bending assembly.
  • the expulsion means are able to move between a first position of non-interference, wherein they are arranged laterally with respect to the bar being worked and allow it to advance freely, and a second expulsion position, wherein they act on the bar to displace it laterally and discharge it from the axis of feed.
  • the expulsion means are arranged immediately upstream of the shearing assembly of the bending machine, and comprise a thruster element with at least a wall orthogonal to the working plane of the machine and able to be moved transversely, by means of a linear actuator to act laterally on the segments to be discharged.
  • the expulsion device has thruster means shaped like an upside-down U or C.
  • the wall orthogonal to the working plane is displaced transversely and causes the bar or segment of bar to be discharged to fall.
  • the expulsion device in the position of non-interference, can define a cavity inside which the bars being worked are able to slide axially.
  • the expulsion device comprises two or more thruster elements which can be activated simultaneously or in any case in coordination, and cooperating respectively with the shears assembly and with one or more pairs of rollers of the drawing assembly. If the length of the segment of bar is such that it remains gripped on the rollers, the activation of the expulsion device is preceded by a step of opening the rollers so as to release the grip on said segments.
  • the device according to the present invention therefore allows to discharge bars or segments of bars of any length, laterally with respect to the machine, so as to prevent the discharged bars from interfering with the correct functioning of the machine.
  • the lateral action of the expulsion means allows to discharge the bars rapidly from the machine so that, if there are malfunctions or breakages, the downtimes are limited and the functioning of the machine is not slowed down.
  • an expulsion device 10 for bars 11, or segments of bars 11a, according to the invention is applied to a bending machine 12.
  • the bending machine 12 comprises a bending disk 13 able to bend/shape the bar 11, a shears 14 arranged upstream of the bending disk 13, and able to finish the bent bars 11, eliminating the parts in excess with respect to the linear development of the formed shape, a first drawing assembly 15 with pairs of rollers arranged upstream of the shears 14, and able to make the bar 11 advance towards the bending disk 13, and a second drawing assembly 16 arranged downstream of the bending device and able to make the bar 11 advance to shape the trailing ends.
  • the bending machine 12 also comprises a lead-in channel 17 arranged upstream of the first drawing assembly 15 and able to facilitate the insertion of the bars 11 into the rollers of the latter.
  • the expulsion device 10 in this case is arranged between the first drawing assembly 15 and the shears 14 and comprises thruster means 20 movable in a direction substantially orthogonal with respect to a nominal axis of feed X of the bar 11 ( figs. 3-10 ), between a first position of non-interference wherein they allow the bar 11 to advance, and an expulsion position, wherein they act on the bar to displace it laterally with respect to the axis X.
  • the lateral movement of the thruster means 20 is achieved by respective linear actuators 21, such as for example hydraulic cylinders.
  • the thruster means 20 are shaped substantially like an upside-down C, and comprise a front wall 20a orthogonal to the plane on which the bars 11 advance, a rear wall 20b parallel to the wall 20a and, connected with the actuator 21, an upper wall 20c which joins together the two upper ends of the walls 20a and 20b.
  • the lower ends of the walls 20a and 20b rest slidingly on a base plate 22, 50 as to define a closed cavity 23 inside which the bars 11 slide.
  • the front wall 20a also functions as a protection element for the operator.
  • the segments of bars 11a produced by the action of the shears 14 have a relatively limited length, so that a single thruster means 20 is able to displace them laterally, driven by the actuator 21, due to the thrust determined by the inner flank of the rear wall 20b.
  • thruster means 20 are provided, in this case three, cooperating respectively with the shears 14 and the pairs of rollers of the drawing assembly 15.
  • the thruster means 20 located on the extreme left in the drawings can replace the channel 17, creating a lead-in for the bars 11 to be inserted into the rollers of the drawing assembly 15.
  • the thruster means 20 is without the front wall 20a.
  • the thruster means 20 is also without the upper wall 20c and has only a wall orthogonal to the plane on which the bar advances, functioning as a thruster element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Paper (AREA)
  • Coating By Spraying Or Casting (AREA)
  • De-Stacking Of Articles (AREA)
  • Coating With Molten Metal (AREA)
  • Drying Of Solid Materials (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Claims (7)

  1. dispositif d'expulsion pour barres (11), ou segments de barres (11a), avançant sur un plan d'une cintreuse (12) apte à fabriquer des étriers ou d'autres éléments façonnés d'armature, caractérisé en ce qu'il comprend des moyens pousseurs (20) pouvant se déplacer, dans une direction sensiblement perpendiculaire à l'axe d'amenée (X) de ladite barre (11) ou segment de barre (11a), entre une première position de non-interférence où ils sont disposés latéralement par rapport à ladite barre (11) ou segment de barre (11a), et lui permettent d'avancer, et une seconde position d'expulsion où ils agissent sur ladite barre (11) ou segment de barre (11a) pour la déplacer latéralement par rapport audit axe d'amenée (X).
  2. Dispositif selon la revendication 1, caractérisé en ce que le déplacement entre ladite position de non-interférence et ladite position d'expulsion est effectué par au moins un actionneur linéaire (21).
  3. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite cintreuse (12) comprend au moins une structure de cintrage (13), un moyen de cisaillage (14) installé en amont de ladite structure de cintrage (13), et un moyen d'étirage (15) installé en amont dudit moyen de cisaillage (14), caractérisé en ce que lesdits moyens pousseurs (20) sont installés entre ledit moyen d'étirage et ledit moyen de cisaillage (14), et comprennent au moins une paroi (20b) sensiblement perpendiculaire au plan sur lequel avance ladite barre (11) et apte à coulisser transversalement par rapport audit plan.
  4. Dispositif selon la revendication 3, caractérisé en ce qu'une paroi supérieure (20c), sensiblement perpendiculaire, est associée à ladite paroi sensiblement perpendiculaire (20b).
  5. Dispositif selon la revendication 4, caractérisé en ce que lesdits moyens pousseurs (20) présentent sensiblement la forme d'un U renversé doté d'une paroi frontale (20a), d'une paroi arrière (20b) et d'une paroi supérieure (20c), lesdites parois (20a, 20b, 20c) définissant une cavité à l'intérieur de laquelle peuvent coulisser lesdites barres (11) ou segments de barres (11a).
  6. Dispositif selon la revendication 3, dans lequel ledit moyen d'étirage comprend une structure d'étirage dotée de cylindres (15), caractérisée en ce que lesdits cylindres peuvent s'ouvrir pour permettre auxdits moyens pousseurs (20) de décharger lesdites barres (11) ou segments de barres (11a).
  7. Dispositif selon la revendication 3, caractérisé en ce qu'il comprend une pluralité desdits moyens pousseurs (20) installés en coopération avec ledit moyen d'étirage (15), lesdits moyens pousseurs (20) pouvant être entraînés de façon coordonnée afin d'agir sur lesdits segments de barres (11a).
EP03001425A 2002-01-24 2003-01-22 Dispositif d'expulsion pour barres ou segments de barres Expired - Lifetime EP1331050B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002UD000013A ITUD20020013A1 (it) 2002-01-24 2002-01-24 Dispositivo espulsore per barre o spezzoni di barre
ITUD20020013 2002-01-24

Publications (2)

Publication Number Publication Date
EP1331050A1 EP1331050A1 (fr) 2003-07-30
EP1331050B1 true EP1331050B1 (fr) 2008-10-01

Family

ID=11460681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03001425A Expired - Lifetime EP1331050B1 (fr) 2002-01-24 2003-01-22 Dispositif d'expulsion pour barres ou segments de barres

Country Status (6)

Country Link
EP (1) EP1331050B1 (fr)
AT (1) ATE409533T1 (fr)
DE (1) DE60323768D1 (fr)
DK (1) DK1331050T3 (fr)
ES (1) ES2316657T3 (fr)
IT (1) ITUD20020013A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104747091A (zh) * 2013-12-31 2015-07-01 中国石油化工集团公司 带齿穴的金刚石孕镶块

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20060147A1 (it) * 2006-06-08 2007-12-09 Piegatrici Macch Elettr Macchina piegatrice per barre, particolarmente per barre alimentate da rotolo, e relativo procedimento
ITMI20130107A1 (it) * 2013-01-24 2014-07-25 Danieli Off Mecc Dispositivo di convogliamento di barre laminate in uscita da una cesoia di taglio, relativa macchina di taglio e relativo processo di taglio

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH336349A (fr) * 1955-10-25 1959-02-28 Soc D Anciens Etablissements J Machine pour former les étriers destinés à une armature métallique de béton armé
AT368724B (de) * 1976-05-28 1982-11-10 Hufnagl & Co Rista Draht Biegemaschine fuer draht
IT1226199B (it) * 1988-11-23 1990-12-21 Piegatrici Macch Elettr Impianto utilizzante una macchina piegatrice raddrizzatrice universale.
IT1235177B (it) * 1989-01-18 1992-06-23 Piegatrici Macch Elettr Gruppo trascinatore a valle gruppo piegatore e procedimento di piegatura in coda.
IT1252984B (it) * 1991-10-21 1995-07-10 Piegatrici Macch Elettr Macchina piegatrice sagomatrice a livelli operativi multipli

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104747091A (zh) * 2013-12-31 2015-07-01 中国石油化工集团公司 带齿穴的金刚石孕镶块

Also Published As

Publication number Publication date
DE60323768D1 (de) 2008-11-13
DK1331050T3 (da) 2009-02-09
ITUD20020013A1 (it) 2003-07-24
EP1331050A1 (fr) 2003-07-30
ES2316657T3 (es) 2009-04-16
ATE409533T1 (de) 2008-10-15

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