EP1321200B1 - Blechbearbeitungsmaschine mit einem Werkzeug - Google Patents

Blechbearbeitungsmaschine mit einem Werkzeug Download PDF

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Publication number
EP1321200B1
EP1321200B1 EP02028321A EP02028321A EP1321200B1 EP 1321200 B1 EP1321200 B1 EP 1321200B1 EP 02028321 A EP02028321 A EP 02028321A EP 02028321 A EP02028321 A EP 02028321A EP 1321200 B1 EP1321200 B1 EP 1321200B1
Authority
EP
European Patent Office
Prior art keywords
machine
spigot
tool
sheet metal
magnet
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
EP02028321A
Other languages
English (en)
French (fr)
Other versions
EP1321200A2 (de
EP1321200A3 (de
Inventor
Luigi Mezzadri
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.)
Schiavi Macchine Industriali SpA
Original Assignee
Schiavi Macchine Industriali SpA
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Filing date
Publication date
Application filed by Schiavi Macchine Industriali SpA filed Critical Schiavi Macchine Industriali SpA
Publication of EP1321200A2 publication Critical patent/EP1321200A2/de
Publication of EP1321200A3 publication Critical patent/EP1321200A3/de
Application granted granted Critical
Publication of EP1321200B1 publication Critical patent/EP1321200B1/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
    • 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
    • B21D5/0209—Tools therefor

Definitions

  • the present invention relates to a sheet metal working machine that uses a tool, with specific reference to a cornice brake, (see for example FR-A-2 791 590 ).
  • Known cornice brakes comprise a fixed lower table whereon is positioned a forming die and a movable upper part whereto the punches or tools are fastened in removable fashion.
  • the tools are locked onto the cornice brake by means of hydraulic, pneumatic or mechanical devices of a mixed type.
  • the Italian patent application for industrial invention number PR99A000050 by the same Applicant discloses magnetic locking means.
  • a securing device for press tools which comprises means for locking the end or spigot internally to a housing of the press, constituted by one or more electromagnets.
  • a first electromagnet is associated to the housing of the press together with a first permanent magnet, whilst a second electromagnet and a second permanent magnet are part of device for retaining the tool.
  • a third permanent magnet is used to guide the tool during mounting operations.
  • the tool needs lateral millings into which the tooth of a set of pincers, which serves as a fall-preventing device, is coupled.
  • the press needs multiple magnets to support and guide the tool during mounting operations and, in particular, it needs electromagnets which make indispensable the availability of appropriate electromagnetic command circuits.
  • An aim of the present invention is to eliminate the aforesaid drawbacks making available a tool that, at the time of its locking to the machine and of its unlocking therefrom, can be held in position without falling by means of magnetic attraction exerted by permanent magnets.
  • An additional aim is to enable to associate a single magnet to each tool in such a way to make the tool itself extremely simple and economical, as well as functional.
  • a further aim is to avoid the millings on the tool, destined to interact with the teeth of the pincers.
  • a sheet metal working machine according to claim 1 or 2.
  • the machine is characterised by a spigot having at least a ferromagnetic projecting element which defines an abutment surface that is inclined relative to the axis of the spigot itself and so shaped as to be coupled with a magnet associated to the machine.
  • the inclination of said surface is such that the magnet exerts a force of attraction with a horizontal component and a vertical component.
  • the magnet can also be associated to the tool and the ferromagnetic surface to the machine.
  • the reference number 1 globally indicates a tool applied to a machine for working sheet metal, in the specific case a cornice brake, only partially illustrated herein.
  • the tool which may have various shapes and dimensions, comprises an operative portion 1a destined to operate on the sheet metal, and a securing portion or spigot 1b destined to be coupled in removable fashion with the machine, for instance by means of appropriate pincers 2.
  • the spigot 1b originally has at least a ferromagnetic projecting element 3 which defines an abutment surface inclined relative to the axis 4 of the spigot, so shaped as to be coupled with a permanent magnet or electromagnet 5, associated with the machine.
  • the inclination of said abutment surface is about 10°-20° and preferably 15 ° (angle ⁇ ) and in any case is such that the magnet 5 exerts an attraction force on the tool with a horizontal component and a vertical component, in such a way that not only the tool rises to abut against an upper end stop 6, but simultaneously adheres also to a later abutment 7.
  • the ferromagnetic projecting element 3, typically metallic, can be obtained by means of a plate inserted in a milling 8 of the spigot and fastened therein for example by means of adhesive substances, as shown in Figure 2 , or it can be achieved simply by adequately shaping the spigot itself which therefore would be in a single piece, as shown in Figure 3 .
  • the projecting element can be on only one side of the tool, or it can be symmetrical on both sides so that the tool itself can be mounted indifferently on the machine without having a preferred direction.
  • the tool has a projecting element 3 defined by the very shape of the tool, and in addition it also has a milling 8 into which can be inserted a plate to define a second projecting element.
  • the shape of the tool may also be such as to define two opposite projecting elements, for example as shown in dashed lines in Figure 3 .
  • a single magnet applied to the machine preferably a permanent magnet
  • a single magnet applied to the machine is sufficient, differently from the plurality of magnets of the prior art, which, moreover, were electromagnets and hence required the presence of an electrical circuit for their operation.
  • the magnet may be associated to the tool and the ferromagnetic surface to the machine.
  • the tool is achieved as a shaped single piece, it has no millings or grooves to receive the teeth of pincers able to serve as retaining means.
  • the retaining means are constituted by the permanent magnet which acts on the ferromagnetic surface and is more than sufficient to assure a correct positioning of the tool and prevent its fall when mounting the tool onto the machine and dismounting the tool from the machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Press Drives And Press Lines (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Jigs For Machine Tools (AREA)

Claims (10)

  1. Blechbearbeitungsmaschine mit einem Werkzeug der Art umfassend einen Betriebsbereich (1a), der auf ein Blech einwirkt, und einen Sicherungsbereich oder Zapfen (1b), der lösbar mit der Maschine gekoppelt wird, dadurch gekennzeichnet, dass der Zapfen (1b) mindestens ein abstehendes ferrogmagnetisches Element (3) aufweist, das eine gegenüber der Achse (4) des Zapfens geneigte Anschlagfläche ausbildet, die zur Kopplung mit einem der Maschine zugeordneten Magneten (5) ausgebildet ist, wobei die Neigung der genannten Fläche derart ist, dass der Magnet (5) eine Anziehungskraft mit einer horizontalen und einer vertikalen Komponente ausübt.
  2. Blechbearbeitungsmaschine mit einem Werkzeug, der Art umfassend einen Betriebsbereich (1a), der auf ein Blech einwirkt, und einen Sicherungsbereich oder Zapfen (1b), der lösbar mit der Maschine gekoppelt wird, dadurch gekennzeichnet, dass der Zapfen (1b) mindestens ein abstehendes Element (3) aufweist, das magnetisch ist oder einen Magneten (5) aufweist, welches eine gegenüber der Achse (4) des Zapfens geneigte Anschlagfläche ausbildet, die zur Kopplung mit einer entsprechenden der Maschine zugeordneten ferromagnetischen Fläche ausgebildet ist, wobei die Neigung der genannten Anschlagfläche derart ist, dass der Magnet (5) eine Anziehungskraft mit einer horizontalen und einer vertikalen Komponente ausübt.
  3. Maschine nach Anspruch 1, bei der das genannte Element (3) durch den Zapfen (1b) selber ausgebildet wird, der aus einem einzigen Stück besteht.
  4. Maschine nach Anspruch 1 oder 2, bei der das abstehende element (3) aus einer Platte besteht, die in eine entsprechende Einfräsung (8) des Zapfens (1b) eingebracht ist, wobei die genannte Einfräsung (8) im wesentlichen gegenüber der Achse (4) des Zapfens geneigt ist.
  5. Maschine nach Anspruch 4, bei der die Neigung der Einfräsung (8) zwischen 10 und 20° liegt.
  6. Maschine nach Anspruch 4, bei der der Zapfen (1b) zwei einander gegenüberliegende Einfräsungen (8) aufweist, welche zwei entsprechende Platten aufnehmen, wodurch der Zapfen (1b) symmetrisch ausgebildet wird und folglich ohne stirnseitige Ausrichtung an der Maschine angebracht werden kann.
  7. Maschine nach Anspruch 3, bei der das abstehende Element (3) auf beiden Seiten des Zapfens (1b) symmetrisch ausgebildet ist.
  8. Maschine nach Anspruch 1 oder 2, bei der das Ende des Zapfens (1b) flach oder rund ist.
  9. Maschine nach Anspruch 1 oder 2, bei der das Werkzeug (1) keinerlei Einfräsungen (8) oder Seitennuten zum Zusammenwirken mit Haltemitteln aufweist.
  10. Maschine nach einem der vorhergehenden Ansprüche 1 bis 9, insbesondere eine Biegepresse, der Art umfassend einen ein Formgesenk tragenden Arbeitstisch, auf welches Formgesenk Werkzeuge (1) einwirken, die an einem oberen beweglichen Teil der Maschine angebracht und durch geeignete Zangen gehaltert sind, dadurch gekennzeichnet, dass sie ein oder mehrere Werkzeuge (1) umfasst, sowie einen oder mehrere Magneten (5) bzw. ferromagnetische Oberflächen, welche den Zangen oder allgemein dem beweglichen oberen Teil der Maschine zugeordnet sind.
EP02028321A 2001-12-21 2002-12-17 Blechbearbeitungsmaschine mit einem Werkzeug Expired - Lifetime EP1321200B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPR20010093 2001-12-21
IT000093A ITPR20010093A1 (it) 2001-12-21 2001-12-21 Utensile in macchina per la lavorazione di lamiera.

Publications (3)

Publication Number Publication Date
EP1321200A2 EP1321200A2 (de) 2003-06-25
EP1321200A3 EP1321200A3 (de) 2003-10-22
EP1321200B1 true EP1321200B1 (de) 2008-03-26

Family

ID=11453481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02028321A Expired - Lifetime EP1321200B1 (de) 2001-12-21 2002-12-17 Blechbearbeitungsmaschine mit einem Werkzeug

Country Status (5)

Country Link
EP (1) EP1321200B1 (de)
AT (1) ATE390219T1 (de)
DE (1) DE60225777T2 (de)
ES (1) ES2304414T3 (de)
IT (1) ITPR20010093A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019090317A1 (en) * 2017-11-06 2019-05-09 Mate Precision Tooling, Inc. Magnetic press brake tooling engagement system
US10792716B2 (en) 2017-06-29 2020-10-06 Mate Precision Tooling, Inc. Magnetic press brake and machine tooling engagement systems
US11383284B2 (en) 2016-09-09 2022-07-12 Mate Precision Technologies Inc. Press brake tool engagement system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012102759U1 (de) * 2012-07-23 2013-07-24 Krones Aktiengesellschaft Faltvorrichtung
US11235370B2 (en) 2019-04-08 2022-02-01 E&S Enterprises Inc. Punch assembly with interchangeable tips

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782166A (en) * 1972-06-09 1974-01-01 L Whistler Die set assembly and magnet means for releasably attaching dies therein
JPH09220618A (ja) * 1996-02-13 1997-08-26 Toupure Kk Ｖ字曲げ加工機用の上型装置
FR2791590A1 (fr) * 1999-03-31 2000-10-06 Michel Brisard Dispositif de mise en position et de maintien pour outils travaillant en exercant une pression et porte-outils correspondant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11383284B2 (en) 2016-09-09 2022-07-12 Mate Precision Technologies Inc. Press brake tool engagement system
US10792716B2 (en) 2017-06-29 2020-10-06 Mate Precision Tooling, Inc. Magnetic press brake and machine tooling engagement systems
WO2019090317A1 (en) * 2017-11-06 2019-05-09 Mate Precision Tooling, Inc. Magnetic press brake tooling engagement system
US10953453B2 (en) 2017-11-06 2021-03-23 Mate Precision Technologies Inc. Magnetic press brake tooling engagement system

Also Published As

Publication number Publication date
ITPR20010093A1 (it) 2003-06-21
EP1321200A2 (de) 2003-06-25
DE60225777D1 (de) 2008-05-08
EP1321200A3 (de) 2003-10-22
ES2304414T3 (es) 2008-10-16
ATE390219T1 (de) 2008-04-15
DE60225777T2 (de) 2009-06-25

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