EP0899031B1 - Vorrichtung zur Herstellung von Blechteilen mit abgekanteten Enden - Google Patents

Vorrichtung zur Herstellung von Blechteilen mit abgekanteten Enden Download PDF

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Publication number
EP0899031B1
EP0899031B1 EP98202323A EP98202323A EP0899031B1 EP 0899031 B1 EP0899031 B1 EP 0899031B1 EP 98202323 A EP98202323 A EP 98202323A EP 98202323 A EP98202323 A EP 98202323A EP 0899031 B1 EP0899031 B1 EP 0899031B1
Authority
EP
European Patent Office
Prior art keywords
sheet
work plane
access
protection structure
machined
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
EP98202323A
Other languages
English (en)
French (fr)
Other versions
EP0899031A3 (de
EP0899031A2 (de
Inventor
Wolfgang Kunze
Gianfranco Venturini
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.)
Salvagnini Italia SpA
Original Assignee
Salvagnini Italia 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 Salvagnini Italia SpA filed Critical Salvagnini Italia SpA
Publication of EP0899031A2 publication Critical patent/EP0899031A2/de
Publication of EP0899031A3 publication Critical patent/EP0899031A3/de
Application granted granted Critical
Publication of EP0899031B1 publication Critical patent/EP0899031B1/de
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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/043—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of plates
    • 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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/04—Movable or exchangeable mountings for tools
    • 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
    • B21D43/003—Positioning devices
    • 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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/045—With a wiping movement of the bending blade
    • 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
    • B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass

Definitions

  • the present invention refers to a machine for the production of metal sheet panels with bent edges, commonly referred to as panel machine.
  • the invention refers to a panel machine equipped with a single bending die to obtain metal sheets of generically rectangular shape having edges that are bent one or more times at one or more of their four sides, for example of the kind described in the Italian patent N. 1086365.
  • Panels of this type have a wide utilisation for example in the manufacture of metal cabinets, refrigerators, washing machines, air conditioners, shelving in general etc.
  • the known panel machines comprise a work plane where to lay the metal sheet (panel) to be machined, a bending press provided with a bending die and located frontally to the work plane, a mechanical hand mobile with respect to the work plane to move the sheet to be machined during machining, an automatic sheet feeder located laterally to the work plane and comprising a carriage for the conveyance of the sheet from the feeder to the work plane and for the removal of the bent sheet from the work plane once the machining has been completed.
  • the conveyor carriage takes the sheet from the feeder and locates it on the work plane; the mechanical hand takes the sheet substantially at its centre and it moves it in such a way so as to position in turn each side to be bent in correspondence of the bending press. Once the machining is completed, the mechanical hand drops the sheet, and the carriage removes it from the work plane.
  • the machining zone that is the work plane
  • the machining zone is substantially accessible from the outside during machining, in order not to hinder the operations of the same carriage.
  • light scan devices laser scanner or photocells
  • JP-A-04 046 644 discloses a sheet panel bending machine having a work plane.
  • US-A-4 863 320 discloses a machine tool wherein the work plane is enclosed inside a protection structure comprising means for the interdiction of the access to the work plane during machining.
  • object of the present invention is to provide for a less complex and as a consequence less costly panel machine and that would anyhow meet the safety requirement imposed by the current regulations.
  • said interdiction means consist of a door mounted on the protection structure in correspondence of the access opening or openings, selectively openable by the human operator for the feeding and removal of the sheet and closable during the machining of the same sheet.
  • the door or doors form physical barriers preventing the access to the work plane when the machine is operating.
  • said interdiction means can consist in light scan devices as photocells or laser scanners, serving the purpose to interrupt the operation of the machine any time that, during machining, a non-recognisable body tries to accede to the work plane through the access door or doors.
  • the panel machine according to the invention is clearly less complex than the known panel machines, since neither automatic feeder nor carriage to convey sheets are provided.
  • a protection structure consisting for example of a barrier made of sheets preferably provided with windows, that would completely isolate the machining zone for the metal sheets from the outside during the same machining.
  • the feeding and removal of sheets from the work plane is carried out through the access opening or openings provided in the protection structure by means of a human operator.
  • the presence of said interdiction devices in correspondence of the access opening or openings guarantees the safety of the operator.
  • the panel machine comprises a work plane 1 for a sheet to be machined 5, a bending press 2 provided with a bending die (that will be described in detail later) positioned frontally to the work plane 1, a mechanical hand 4 mobile as regards the work plane 1 for the movement of the sheet 5 during machining, and a protection structure 6, consisting of sheets preferably provided with windows, that encloses the work plane 1 with the mechanical hand 4, and the bending press 2.
  • two openings 7 for the access to the machining zone are provided on opposite sides of the work plane, that allow a human operator to introduce a sheet to be machined 5 on the work plane 1 and to remove the sheet once the machining is completed.
  • the access openings are associated with respective doors 8, that can be seen in a magnified scale in Figure 3, hinged to a supporting frame (not shown for clearness reasons) in the protection structure 6 in such a way so as to result to be turnable around respective horizontal axes.
  • conventional gas cylinders (not shown) can be provided in order to facilitate the opening and closing of the doors 8.
  • the protection structure 6 comprises two openings for the access to the work plane, so that the latter turns out to be accessible from either sides; however, it could also be possible to provide for a single access opening.
  • the mechanical hand 4 comprises a carriage globally indicated by 9, conformed as an "arch press" mobile as regards the work plane 1 through a longitudinal slit 3 of the same on rectilinear horizontal guides 10 supported by a bed 11 which rests on the floor, said guides 10 extending perpendicular to the front of the bending press 2.
  • a fluid mechanical cylinder 50 causes the movement of the carriage 9 along the guides 10 in the direction toward or away from the bending press 2.
  • the carriage 9 supports a hydraulic vice 12 with overlaid and coaxial lower and upper jaws 13, 14 having flat and horizontal opposite walls suitable to clamp between them the sheet to be machined, as shown in Figure 4.
  • the lower jaw 13 is fixedly mounted on the upper end of a horizontal shaft 15 set into rotation by a rotator 16 mounted on the lower part of the carriage 9 and capable to confer the shaft 15 and the lower jaw 13 angular shift by 90° and 180° in one and in the opposite direction.
  • the upper jaw 14 is fixedly mounted to the lower end of a vertical shaft 17 turningly held in idle mode by a bracket arm 51 held in turn in a slidingly vertical way by the end of the upper part of the carriage 9.
  • a fluid mechanical cylinder causes the lowering and lifting of the bracket arm 51, and therefore of the jaw 14, in such a way as to respectively clamp the sheet to be machined 5 between the jaws 13, 14 or to release the same sheet.
  • the shaft 17 must idle in rotation around its own axis, in order not to prevent the rotation of the sheet 5 by means of the rotator 16, the jaw 14 having to co-operate with the jaw 13 in order to clamp the sheet 5.
  • the mechanical hand 4 comprises a thrust means 19, that can also be seen in Figure 2 and shown in Figure 4 into two different operating positions, globally mobile with the carriage 9 and also independently set in motion by a respective fluid mechanical cylinder 52 and sliding in a slide created in the lower part of the carriage 9.
  • the thrust means 19 When the thrust means 19 is in the position of rest, it is substantially in correspondence of the throat of the arch press 9; by moving forward along the slide toward the bending press 2 under the action of the cylinder 52, the thrust means 19 abuts against the back edge of the sheet to be machined in such a way as to push the sheet 5 and to allow its automatic correct positioning, as it will be described more in detail later.
  • the bending press 2 comprises a bearing structure having a substantially "C" shaped section and comprising a lower wing 21 and an upper wing 22.
  • the lower wing 21 rests on the floor, while the upper wing 22 is hinged to the lower wing 21 in correspondence of flanges 23 located on the back of the latter, in such a way so as to result turnable around a horizontal axis indicated by A.
  • a cylinder-piston unit 24 produces the rotation of the upper wing 2 around the axis A, being provided at least one vertical rod 25 (schematically indicated by dots and lines) which acts as a guide to the movement of the upper wing 22.
  • a vertical support 26 is fixed having a free flat and horizontal upper surface located at the same level of the work plane 1, that forms a lower blank holder.
  • an upper blank holder 27 is fixed in such a way so as to extend vertically toward the bottom, that is provided with a free flat lower surface suitable to co-operate with the upper surface of the lower blank holder in order to clamp the sheet to be machined near the edge of the same to be bent.
  • a bending blade holder 28 is housed, having a substantially "C" shape, in cross section.
  • the blade holder 28 comprises a lower arm 29 and an upper arm 30 which extend toward the front of the bending press 2.
  • a lower bending blade 34 is fixed at the end of the lower arm 29, while an upper bending blade 35 is fixed to the upper arm 30.
  • the blade holder 28 is hinged to a torsion bar 31 in such a way so as to result as being turning around the axis indicated by C.
  • the torsion bar 31 is also turnable around the horizontal axis indicated by B under the action of a fluid mechanical cylinder, of which only the rod 32 is schematically shown in dots and lines.
  • a fluid mechanical cylinder (whose rod 33 is schematically shown in dots and lines) produces the rotation of the blade holder 28 around the axis C.
  • the combination of the rotation of the torsion bar 31 around its own axis B, which determines the position of the axis of rotation C of the blade holder 28, and the rotation of the blade holder 28 around the axis C allows a great variety of movements to the bending blades 34, 35 in order to obtain bends with various angles both upward and downward.
  • a known reference-bearing block 36 Frontally to the support 26 a known reference-bearing block 36 is mounted, that has a flat horizontal upper surface 37 at the same level of the work plane 1 and inside of which reference elements 38 visible also in Figures 1 and 2 are located.
  • the block 36 is movable in a direction perpendicular to the front of the bending press 2, so that it can move away from or toward the same.
  • the reference elements 38 normally retractable inside the block 36 during the machining of the sheet, can project in such a way so as to jut out from the surface 37.
  • the reference elements 38 can also move in a direction parallel to the front of the bending press, in such a way that they can mutually move toward or away from each other.
  • each reference element 38 (shown by a continuous line in a position of rest, retracted and by dots and lines in the operating position, projecting) is turningly supported by a respective carriage 61 mounted on an endless screw 39, extending parallel to the front of the bending press 2 and mortised on a pulley 62-which in turn is set in rotation by a motor 60 through a belt 63.
  • the carriage 61 can therefore move in the direction parallel to the front of the bending press.
  • a bar 64 extends, which form the axis of rotation of the reference element 38.
  • a cylinder-piston unit 65 whose vertical rod 66 is hinged to the reference element 38 while the cylinder is hinged to the reference-bearing block 36 causes the rotation of the reference 38 around the bar 64, in such a way so as to produce the projection or the retraction of the reference element 38 from the reference bearing block 36.
  • the operator takes a sheet to be machined, opens the door 8 in order to accede to the work plane 1, and positions the sheet to be machined on the work plane, in a roughly central position. Therefore, the operator closes the door 8 and he turns the panel machine on.
  • the mechanical hand 4 initially in a position distant from the bending press 2 and with the upper jaw 14 lifted, moves toward the bending press.
  • the thrust means 19 is activated by the relative cylinder 52, and moves along the relative slide toward the front of the bending press 2, in such a way so as to abut against the back edge of the sheet to be machined and to push the latter toward the bending press.
  • the two retractable reference elements 38 project, so that the fore edge of the sheet, pushed by the thrust means 19, abuts against the same reference elements.
  • the conformation of the reference elements 38 is such as to allow the centring of the sheet to be machined, in a direction parallel to the front of the bending press, whether or not this has sheared corners.
  • the possibility to move the reference elements 38 in a direction parallel to the front of the bending press allows the centring of sheets having variable dimensions. Therefore, the operator has not to worry about positioning the sheet on the work plane in a precise manner.
  • the reference elements 38 retract, and the thrust means 19 returns to its rest position, in such a way as not to represent an obstacle during the following stages of the machining.
  • the upper jaw 14 lowers and in co-operation with the jaw 13, it holds the sheet in a substantially central position. Therefore, the mechanical hand moves the sheet forward, toward the bending press.
  • the upper wing 22 of the latter is lifted, so that the upper blank holder is enough distant from the lower blank holder 26 to allow the passage of the sheet.
  • the cylinder 24 produces the lowering of the upper wing 22 so that the upper blank holder 27 presses against the lower blank holder 26, an edge of the sheet to be machined projecting inside the bending press.
  • the cylinders whose rods are indicated by 32 and 33 in Figure 4 set in motion the blade holder 28, whose bending blades 34 and 35 cause bending of the edge of the sheet, in co-operation with the blank holder 26, 27.
  • the upper wing 22 of the bending sheet is lifted, and the sheet released from the hold of the upper blank holder 27.
  • the mechanical hand 4 backs, removing the sheet from the bending press and, if other edges of the sheet have to be bent, it carries out the rotation of the sheet by 90° or 180° by means of the rotator 16.
  • the mechanical hand moves forward again bringing the edge of the sheet to be machined inside the bending press, and the operations described above are repeated.
  • the operator stops the machine, he opens the door 8, and he removes the sheet from the work plane, he takes a new sheet, he positions it on the work plane, he closes the door and turns the machine on.

Landscapes

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

Claims (5)

  1. Vorrichtung zur Herstellung von Metallblechteilen mit abgekanteten Rändern, welche eine Arbeitsfläche (1) für ein zu bearbeitendes Blech, eine Biegepresse (2), welche mit einem Biegewerkzeug versehen und vorderseitig zu einer Bearbeitungsebene angeordnet ist, ein mechanisches Griffteil (4), welches bezüglich der Arbeitsebene zur Verschiebung des Blechs (5) während der Bearbeitung beweglich ist und eine Blechpositioniereinrichtung (19,38) aufweist, um das zu bearbeitende Blech (5) automatisch zu positionieren, nach dem es durch eine Bedienungsperson zu der Arbeitsebene (1) gebracht worden ist, dadurch gekennzeichnet, daß die Arbeitsebene im Innern eine Schutzeinrichtung (6) im wesentlichen eingeschlossen ist, die Schutzeinrichtung wenigstens eine Zugangsöffnung (7) zu der Arbeitsebene zur Aufgabe und zur Abnahme des Blechs von der Arbeitsfläche anstelle einer menschlichen Bedienungsperson aufweist, daß wenigstens eine Zugangsöffnung (7) der entsprechenden Einrichtung (8) zur Unterbindung eines Zugangs zu der Arbeitsebene während der Bearbeitung zugeordnet ist, und daß die Blechpositioniereinrichtung (19,38) in der Schutzeinrichtung (6) eingeschlossen ist und zurückziehbare Referenzelemente (38) aufweist, welche im Grundzustand bezüglich der oberen Fläche der Arbeitsebene (1) zurückgezogen sind und bezüglich der oberen Fläche der Arbeitsebene währens eines Vorgangs zur Positionierung des Blechs (5) vrschiebbar sind, um mit einem vorderen Rand des Blechs (5) in Eingriff zu kommen, und eine bewegliche Andrückeinrichtung (19) aufweist, welche mit einer hinteren Kante des Blechs zusammenarbeitet, um die vordere Kante des Blechs gegen die Referenzelemente zu drücken.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Unterbindungseinrichtung (8) für den Zugang zu der Arbeitsebene (1) eine Türe aufweist, die mit der Öffnung (7) verbunden und durch eine Bedienungsperson zur Aufgabe und zur Abnahme des Blechs (5) vor und nach der Bearbeitung öffenbar ist sowie schließbar ist, um den Zugang zu der Arbeitsebene während der Bearbeitung zu verhindern.
  3. Vorrichtung nach Ansprch 2, dadurch gekennzeichet, daß die Türe (8) an der Schutzeinrichtung (6) unter Zuordnung zu der Öffnung (7) derart angebracht ist, daß sie um eine horizontale Achse drehbar ist.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie ein Paar von zurückziehbaren Referenzelementen (38) aufweist.
  5. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das mechanische Griffteil in Richtung auf die Biegepresse (2) zu und von dieser wegbewegbar ist und ein Spannblech (12) zur Einspannung des zu bearbeitenden Blechs (5) in einer Position im wesentlichen mittig hierzu und ein Drehteil (16) aufweist, um das Blech (5) in die Arbeitsebene zu drehen.
EP98202323A 1997-08-29 1998-07-09 Vorrichtung zur Herstellung von Blechteilen mit abgekanteten Enden Expired - Lifetime EP0899031B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI971982 1997-08-29
IT97MI001982A IT1294363B1 (it) 1997-08-29 1997-08-29 Macchina per la produzione di pannelli di lamiera con bordi piegati

Publications (3)

Publication Number Publication Date
EP0899031A2 EP0899031A2 (de) 1999-03-03
EP0899031A3 EP0899031A3 (de) 1999-09-29
EP0899031B1 true EP0899031B1 (de) 2003-09-10

Family

ID=11377798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98202323A Expired - Lifetime EP0899031B1 (de) 1997-08-29 1998-07-09 Vorrichtung zur Herstellung von Blechteilen mit abgekanteten Enden

Country Status (8)

Country Link
EP (1) EP0899031B1 (de)
JP (1) JPH11129098A (de)
KR (1) KR19990023887A (de)
AT (1) ATE249294T1 (de)
BR (1) BR9803197A (de)
CA (1) CA2245081A1 (de)
DE (1) DE69817953D1 (de)
IT (1) IT1294363B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007237191A (ja) * 2006-03-06 2007-09-20 Amada Co Ltd 曲げ加工ユニット
CN100387371C (zh) * 2006-06-23 2008-05-14 钱国钧 双金属片全自动成形机
ITMI20121583A1 (it) * 2012-09-24 2014-03-25 Salvagnini Italia Spa Macchina pannellatrice a lama orientabile.
CN108746392A (zh) * 2016-12-14 2018-11-06 安徽海拓志永智能装备股份有限公司 一种悬挂式机械手自动化冲压线
CN106925632B (zh) * 2017-02-28 2019-02-12 东莞市东锻机械有限公司 一种柔性折弯中心
CN107262618B (zh) * 2017-06-30 2023-09-01 福州大学 定位机构及其工作方法
CN109676050B (zh) * 2018-12-26 2024-04-02 苏州艾弗伦智能技术有限公司 一种冲床自动上料装置
CN111687283B (zh) * 2020-07-14 2022-04-08 芜湖弘度智能科技有限公司 一种落地式空调面板加工工艺

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1086365B (it) * 1977-09-19 1985-05-28 Salvagnini Transferica Spa Macchina per la produzione di pannelli di lamiera rettangolare con bordi piegati
DE3605983A1 (de) * 1986-02-25 1987-08-27 Chiron Werke Gmbh Werkzeugmaschine
JPH0446644A (ja) * 1990-06-13 1992-02-17 Amada Co Ltd 原点位置決めローディング装置
FR2686533B1 (fr) * 1992-01-27 1996-05-15 Favien Ets Presse plieuse a tablier, de securite.
DE19529570A1 (de) * 1995-08-11 1997-02-20 Reinhardt Gmbh Maschbau Werkstückanschlageinrichtung

Also Published As

Publication number Publication date
EP0899031A3 (de) 1999-09-29
BR9803197A (pt) 1999-11-09
ITMI971982A1 (it) 1999-03-01
IT1294363B1 (it) 1999-03-24
DE69817953D1 (de) 2003-10-16
KR19990023887A (ko) 1999-03-25
CA2245081A1 (en) 1999-02-28
JPH11129098A (ja) 1999-05-18
EP0899031A2 (de) 1999-03-03
ATE249294T1 (de) 2003-09-15

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