EP2483008B1 - Machine de cintrage à la presse - Google Patents

Machine de cintrage à la presse Download PDF

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Publication number
EP2483008B1
EP2483008B1 EP10776423.5A EP10776423A EP2483008B1 EP 2483008 B1 EP2483008 B1 EP 2483008B1 EP 10776423 A EP10776423 A EP 10776423A EP 2483008 B1 EP2483008 B1 EP 2483008B1
Authority
EP
European Patent Office
Prior art keywords
piece
press
lower cross
bending machine
cross
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.)
Not-in-force
Application number
EP10776423.5A
Other languages
German (de)
English (en)
Other versions
EP2483008A1 (fr
Inventor
Luciano Gasparini
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.)
G01com Srl
Original Assignee
G01com Srl
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Filing date
Publication date
Application filed by G01com Srl filed Critical G01com Srl
Publication of EP2483008A1 publication Critical patent/EP2483008A1/fr
Application granted granted Critical
Publication of EP2483008B1 publication Critical patent/EP2483008B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0272—Deflection compensating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides

Definitions

  • the invention concerns a press-bending machine, according to the preamble of claim 1
  • PR press-bending machines In order to bend metal sheets usually PR press-bending machines are used of the type described in US 6 732 559 or WO 98/46378 , see fig 1 . These PR machines comprise a fixed lower table or cross-piece 12 with a bending matrix 22, and an upper cross-piece 10, that is mobile with respect to the lower cross-piece 12 and that is equipped with a punch 20 corresponding to the matrix 22. A frame 18 is used for supporting the upper cross-piece 10, whereas thanks to power actuator means, the cross-pieces 10, 12 come closer to one another so as to obtain the bending action.
  • the frame 18 is always a solid and very heavy C-shaped structure (see for example figure 2 of US 6 732 559 ) since it must support the thrust reaction on the piece to be bent as well as the weight of the upper cross-piece. It comes from the above one piece heavy and bulky, both in height and in depth, thus limiting the mobility of the workers around the machine and the maximum stoke of the upper cross-piece. Moreover, a similar frame is very expensive and an enormous amount of metal is needed to build it.
  • Document GB 784,981 descloses a press-bending machine according to the preamble of claim 1, comprising a fixed lower cross-piece with a holder for a matrix bending, an upper cross-piece, supported by a frame movable with respect to the lower cross-piece and provided with one or more punches corresponding to the matrix, and power actuator means for pushing the cross-pieces toward each other, the upper cross-piece being integral with the frame, and both being movable and displaceable by the power actuator means towards the lower cross-piece during pressing phase.
  • This document describes a solution for feeding pieces in the machine which foresees the rotation of the whole upper cross-piece around the axis of one of the cylindrical guide members.
  • Document EP 0476092 B1 discloses a sheet bending machine in which the upper cross-piece is mounted on lateral supports and guided on the frame in an up and down movement so as to be pivotable about an horizontal axis, and in which the lower bending punches are articulately coupled to each other.
  • the purpose of the invention is to propose an alternative press-bending machine that does not have these drawbacks.
  • the power actuator means which in the prior art were mounted on the C-shaped frame and made the structure complicated because they required reinforced undercuts or seats, can comprise a linear actuator that exerts a thrust between two points of application so as to make them move apart during the pressing phase.
  • the first of said points is (advantageously) made to push on the lower cross-piece and the second point is made to push on the frame and is located closer than the first one to a plane on which the lower cross-piece rests.
  • the frame prefferably has a vertical stroke such as to be able to move down below the plane on which the lower cross-piece rests. This makes it possible for the frame to move down, for example, below the height of the flooring on which the lower cross-piece rests, avoiding having to use big industrial buildings for machines with high power and long strokes.
  • the frame comprises two elongated bodies which are vertically mobile having the upper end fixedly connected to the upper cross-piece so as to pull it downwards and the lower end configured so as to receive the driving of the power actuator means.
  • Such means are fixed to the short side of the lower cross-piece and are positioned at the side of each elongated body or on the same axis thereof.
  • the elongated vertical bodies have each two arms that are substantially parallel, spaced apart and joined at their ends with two joint-segments.
  • the elongated vertical bodies have a symmetrical shape with respect to the longitudinal axis.
  • These arms have the upper joining portion that is fixedly connected to the upper cross-piece so as to pull it downwards and the lower joining portion configured so as to receive the driving of the power actuator means, which are fixed to the lower cross-piece and positioned in the empty space available between the two arms.
  • the arms thus move outside of the actuator means. It should be noted how there is a more compact structure associated with a greater hardiness to traction stress.
  • the two elongated bodies can be substantially U-shaped or have the shape of an elongated closed loop, and such as to leave a span between the arms through which a piece to be bent can be fed to the press-bending machine along a direction that is substantially parallel to the plane containing the cross-pieces.
  • the two elongated bodies can be substantially U-shaped or have the shape of an elongated closed loop, and such as to leave a span between the arms through which a piece to be bent can be fed to the press-bending machine along a direction that is substantially parallel to the plane containing the cross-pieces.
  • guide structures Since it is necessary for guide structures to be foreseen, they are advantageously arranged on the lower cross-piece in such a way that the two elongated bodies run along it in a guided manner.
  • the guide elements were arranged on the edges of the C-shaped frame, which also has the drawback that in order to obtain for example one metre of useful stroke of the upper cross-piece, it is necessary to have a 1m long cylinder, from which a 1m long piston, and 1m long guide elements come out. This is due to the fact that in the conventional "C-shaped" structure the guide elements can only be installed in axis with the pistons.
  • the guide elements are positioned so that, in order to obtain a 1m useful stroke of the upper cross-piece, there are only 2m of longitudinal bulk, i.e. a 1m long cylinder plus a 1m long piston.
  • said guide structures comprise T-shaped guide elements, arranged on two sides of the lower cross-piece, in each of which the two arms of the elongated bodies are slidingly inserted.
  • the lower cross-piece thus ensures the rigidity of the guiding structure.
  • sliding skids can be arranged on the surface of the guide structures in sliding contact with the elongated bodies.
  • the press-bending machine can be equipped with a platform arranged on the side of the lower cross-piece on which a manipulator robot for loading/unloading/moving the pieces to be bent, can move.
  • a manipulator robot for loading/unloading/moving the pieces to be bent, can move.
  • the platform can also surround at least three sides of the lower cross-piece, so that the robot can move around the press-bending machine from one long side to the other of the lower cross-piece.
  • a press-bending machine 30 can be seen having a fixed lower table or cross-piece with a bar 38 to receive a holder for a matrix bending and an upper cross-piece 32 equipped with mounts 36 for a punch corresponding to the matrix.
  • the upper cross-piece 32 is mobile with respect to the lower cross-piece 34, so that the punch enters into the matrix bending a metal sheet arranged between them.
  • a frame that supports the upper cross-piece 32 and that is integral with it, is made up of two elongated bodies 40 movable vertically each having two arms 42, 44 that are substantially parallel, spaced apart and joined at the ends by two joint-segments 46, 48, upper and lower respectively.
  • the bodies 40 extend in their entirety in a compact manner at the sides of the lower cross-piece 32.
  • the press-bending machine 30 substantially has a symmetrical structure.
  • the arms 42, 44 have the upper end fixedly connected to the upper cross-piece 32 so as to pull it downwards and the lower end configured so as to receive the driving of the power actuator means 50.
  • the two elongated bodies 40 substantially have the shape of an elongated closed loop, so as to leave, between the arms 42, 44, a span LL (see figure 3 ), through which it is possible to see the press-bending machine 30 and through which it is possible to feed the latter with a piece to be bent along a direction that is parallel to the greater dimension of the cross-pieces 32, 34.
  • the means 50 are like a hydraulic cylinder 52, fixed to the lower cross-piece 34, from which a piston 54 can come out to a certain extent.
  • the means 50 are located in the empty space between the two arms 42, 44.
  • the piston 54 abuts against the lower portion 48 and receives the thrust, which is then transferred to the upper cross-piece 32.
  • the actuator means 50 act as a linear actuator that exerts a thrust between two points of application: one point pushes against the upper cross-piece 34 and the other point pushes against the frame, where the latter is located lower than the former.
  • the guide elements 60 are formed by a horizontal bar that projects with a base 64 on the short side of the lower cross-piece 34 for as far as the thickness of the arms 42, 44. Therefore, the bar 62 prevents the arms 42, 44 from separating from the lower cross-piece 34.
  • Another bar 66 acts as a lower support for the arms 42, 44 on the side opposite to that in which the bar 62 acts.
  • the frame Due to the structure of the frame, it can have a vertical stroke such as to go down below the plane on which the lower cross-piece 34 rests, i.e. below the level of the platform 80.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Air Bags (AREA)

Claims (9)

  1. Presse plieuse comprenant
    - une traverse inférieure fixe (34) munie d'un support pour une matrice de pliage ;
    - une traverse supérieure (32), mobile par rapport à la traverse inférieure et munie de moyens (36) pour amener un ou plusieurs poinçons correspondants à la matrice;
    - un châssis (40) pour supporter la traverse supérieure ;
    - des moyens d'actionnement motorisés (50) pour pousser les traverses l'une vers l'autre ;
    la traverse supérieure étant d'une seule pièce avec le châssis, et les deux étant mobiles et déplaçables par les moyens d'actionnement motorisés vers la traverse inférieure durant la phase de pressage ; ledit châssis (40) étant composé de deux corps allongés mobiles verticalement, s'étendant dans leur totalité d'une manière compacte au niveau des côtés de la traverse inférieure (34),
    caractérisée en ce que chacun desdits deux corps allongés a deux bras (42,44) qui sont sensiblement parallèles, écartés et unis aux extrémités par deux segments d'articulation (46,48) respectivement supérieur et inférieur, lesdits bras (42,44) ayant l'extrémité supérieure reliée de manière fixe à la traverse supérieure (32) de manière à la tirer vers le bas et l'extrémité inférieure configurée de manière à recevoir l'entraînement des moyens d'actionnement motorisés (50).
  2. Presse plieuse selon la revendication 1, dans laquelle les moyens d'actionnement motorisés comprennent un actionneur linéaire (50) adapté pour exercer une poussée entre deux points d'application de manière à les faire s'écarter durant une phase de pressage, le premier desdits points poussant sur la traverse inférieure et le deuxième point poussant sur le châssis et étant placé plus près que le premier par rapport à un plan sur lequel repose la traverse inférieure.
  3. Presse plieuse selon la revendication 1 ou 2, dans laquelle le châssis s'étend sensiblement seulement le long des côtés de la traverse inférieure.
  4. Presse plieuse selon l'une quelconque des revendications précédentes, dans laquelle le châssis a une course verticale telle qu'il soit en mesure de descendre au-dessous d'un plan sur lequel repose la traverse inférieure.
  5. Presse plieuse selon la revendication 1, dans laquelle les deux corps allongés (40) ont sensiblement un profil en U ou un profil en boucle fermée allongée, et de manière à laisser entre les bras (46,48) un intervalle à travers lequel une pièce à plier peut être amenée à la presse plieuse suivant une direction sensiblement parallèle au plan contenant les traverses.
  6. Presse plieuse selon la revendication 1, dans laquelle la traverse inférieure comprend des structures de guidage (60) dans lesquelles les deux corps allongés coulissent de manière guidée.
  7. Presse plieuse selon la revendication 6, dans laquelle lesdites structures de guidage comprennent de guides en T (60), placés sur deux côtés de la traverse inférieure, dans chacun desquels sont insérés de manière coulissante les deux bras d'un corps allongé.
  8. Presse plieuse selon la revendication 6 ou 7, dans laquelle des patins de glissement (70) sont présents sur la surface des structures de guidage en contact glissant avec les corps allongés.
  9. Presse plieuse selon l'une quelconque des revendications précédentes, comprenant une plate-forme (80) placée latéralement à la traverse inférieure sur laquelle est mobile un robot manipulateur pour le chargement/déchargement/manipulation des pièces à plier, dans laquelle la plate-forme enferme au moins trois de la traverse inférieure, de manière que le robot puisse se déplacer autour de la presse plieuse d'un côté long à l'autre côté long de la traverse inférieure.
EP10776423.5A 2009-10-02 2010-09-28 Machine de cintrage à la presse Not-in-force EP2483008B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVR2009A000161A IT1395798B1 (it) 2009-10-02 2009-10-02 Pressa piegatrice
PCT/IB2010/054349 WO2011039697A1 (fr) 2009-10-02 2010-09-28 Machine de cintrage à la presse

Publications (2)

Publication Number Publication Date
EP2483008A1 EP2483008A1 (fr) 2012-08-08
EP2483008B1 true EP2483008B1 (fr) 2013-06-26

Family

ID=43348144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10776423.5A Not-in-force EP2483008B1 (fr) 2009-10-02 2010-09-28 Machine de cintrage à la presse

Country Status (4)

Country Link
EP (1) EP2483008B1 (fr)
BR (1) BR112012007497B1 (fr)
IT (1) IT1395798B1 (fr)
WO (1) WO2011039697A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20120072A1 (it) 2012-05-08 2013-11-09 Andrea Argentin Dispositivo di riferimento posizionale
AT515153B1 (de) * 2013-12-04 2015-08-15 Trumpf Maschinen Austria Gmbh Biegemaschine
AT515130B1 (de) * 2013-12-04 2015-08-15 Trumpf Maschinen Austria Gmbh Biegepresse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB784981A (en) * 1956-05-17 1957-10-23 F J Edwards Ltd Improvements in or relating to metal working machines
AT393639B (de) * 1990-03-15 1991-11-25 Lift Verkaufsgeraete Gmbh Blechbiegevorrichtung
IT1293174B1 (it) * 1997-04-11 1999-02-12 Luciano Gasparini Procedimento di presso-piegatura della lamiera metallica con sistema di misurazione diretta comprendente una funzione di compensazione e
ITTV20010091A1 (it) * 2001-07-06 2003-01-06 Luciano Gasparini Dispositivo integratore per rilevare e recuperare la deformazione delle spalle in una macchina presso piegatrice

Also Published As

Publication number Publication date
BR112012007497B1 (pt) 2021-07-27
BR112012007497A2 (pt) 2017-08-08
WO2011039697A1 (fr) 2011-04-07
IT1395798B1 (it) 2012-10-19
EP2483008A1 (fr) 2012-08-08
ITVR20090161A1 (it) 2011-04-03

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