EP1316373A1 - Procédé et dispositif de découpage successif d'un semi-fini ou d'une ébauche à partir d'une bande métallique - Google Patents

Procédé et dispositif de découpage successif d'un semi-fini ou d'une ébauche à partir d'une bande métallique Download PDF

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Publication number
EP1316373A1
EP1316373A1 EP02079386A EP02079386A EP1316373A1 EP 1316373 A1 EP1316373 A1 EP 1316373A1 EP 02079386 A EP02079386 A EP 02079386A EP 02079386 A EP02079386 A EP 02079386A EP 1316373 A1 EP1316373 A1 EP 1316373A1
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EP
European Patent Office
Prior art keywords
die
assembly
strip
blank
cutting
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.)
Withdrawn
Application number
EP02079386A
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German (de)
English (en)
Inventor
Gaetano Donatiello
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.)
Digiemme Srl
Original Assignee
Digiemme Srl
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 Digiemme Srl filed Critical Digiemme Srl
Publication of EP1316373A1 publication Critical patent/EP1316373A1/fr
Withdrawn legal-status Critical Current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
    • B21D53/00—Making other particular articles
    • B21D53/38—Making other particular articles locksmith's goods, e.g. handles
    • B21D53/40—Making other particular articles locksmith's goods, e.g. handles hinges, e.g. door hinge 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working

Definitions

  • the present invention relates to a method for die-cutting in succession from a strip of metal a semi-finished piece or a blank, in particular, a plane one, for instance a blank to be used for the production of technical articles for furniture, such as the so-called "leaves" of hinges for pieces of furniture.
  • the peculiar characteristic of the method according to the invention is the die-cutting in succession of one blank at a time, with partial recovery of the material of the metal strip, which must necessarily be left between two successive "shapes".
  • shape is meant the opening or window identified in the metal strip or sheet after each die-cutting operation to form the blank.
  • the invention also relates to an apparatus that enables a particularly advantageous implementation of the method, as well as to the blanks and end components -for example, hinges for pieces of furniture- obtained using said method and apparatus.
  • the systems most widely adopted are the ones in which die-cutting of the blank is performed according to a drawing whereby, on the metal strip, the "shapes", identified via the die-cutting operation, penetrate into one another and in which the operation of die-cutting is performed on the strip, which moves in step-like fashion either in a straight line or following a zigzag path.
  • the general purpose of the present invention is to provide a method and an apparatus for implementation thereof, whereby it will be possible to recover a large amount of the material of metal strip that is to be left between one blank and the next so as to carry out the blanking operation properly.
  • the particular purpose of the invention is to recover the material left between one blank (shape) and the next in the die-cutting of one blank at a time, where the shapes of the consecutive blanks penetrate into one another, being rotated by 180° with respect to one another.
  • the method and apparatus according to the present invention are particularly suitable for the production of relatively small series of pieces, where there exists the advantage of die-cutting one blank at a time in succession.
  • number 10 designates as a whole a non-limiting example of a semi-finished piece or blank to be made using the method and apparatus of the present invention, namely a blank that is to undergo subsequent processes for forming a so-called "leaf" of a hinge for pieces of furniture.
  • a multiplicity of blanks 10 are die-cut, in succession, from a strip of metal 11 having the shapes (openings) 12 that do not interpenetrate, and hence with a considerable waste of material of the metal strip.
  • the present invention belongs in the context described above, with reference to Figures 1 to 3, the main aim of which is to provide a method and an apparatus that are economically advantageous for die-cutting one blank at a time in succession from a metal strip.
  • the method according to the invention is implemented using an apparatus comprising a die 14, a schematic illustration of which is provided in Figure 4 and, in greater detail, in Figures 12 to 19.
  • the die 14 is structurally formed by a first punch-matrix assembly 15 and a second punch-matrix assembly 16.
  • the first assembly 15 comprises a punch 17 and a matrix 17A
  • the second assembly 16 comprises a punch 18 and a matrix 18A.
  • the matrices 17A and 18A may be integral ones (i.e., made of a single piece) or else made up of a number of separate pieces.
  • the punches 17, 18 are set at the bottom , whilst the matrices 17A, 18A opposing them are set at the top, but of course such an arrangement could be inverted.
  • the punches 17, 18 (and the corresponding matrices 17A, 18A) are set rotated by 180° with respect to one another.
  • the distance between the punches 17, 18 and the corresponding matrices 17A, 18A, as is known, should be such as to guarantee an adequate mechanical resistance of the die over time.
  • the punches 17, 18 and the respective matrices 17A, 18A have a relative motion in a vertical direction for die-cutting of the strip 11 and operate alternately in succession, i.e., when the first punch-matrix assembly 15, 17, 17A is operating, the second punch-matrix assembly 16, 18, 18A is not operating, and vice versa.
  • the punches 17, 18 act alternately on the strip 11, blanking it, whilst, in the lowered position, they do not act on the strip 11, and do not interfere with it.
  • the blanking method according to the invention comprises the operating steps described in what follows.
  • the strip 11 is fed, in the direction indicated by the arrow F, between the assemblies 15, 16, with the head T in a position such as to comprise the entire shape of the first punch-matrix assembly 15, 17, 17A.
  • the punch 17 is raised in the operative position, whilst the punch 18 is lowered in the non-operative position, as illustrated in Figures 15 and 16, respectively.
  • the blank S1 thus cut is then raised from the punch 17 using a first extractor 19 (see Figures 6, 14), rotated through 90°, and, using a transfer of a known type, designated as a whole by F1, brought into the position illustrated in Figure 7 (outside of the die) to be sent on for subsequent processing operations in the workstations of the plant set downstream of the first station, which comprises the die 14.
  • a first extractor 19 see Figures 6, 14
  • F1 a transfer of a known type, designated as a whole by F1
  • the strip 11 is now fed by one step into the position illustrated in Figure 8, so as to enable cutting of a second blank S2 with the maximum interpenetration in the shape 12A, i.e., with as small a distance "d" as possible.
  • the blank S2 thus cut is then raised from the punch 18 using a second extractor 20 (see Figure 9), rotated through 90°, and, using the transfer F1, brought into the position illustrated in Figure 10 to be sent on for the subsequent processing operations as for the blank S1.
  • the die-cutting of the blank S2 has left in the strip a shape 12B, which is identical to the shape 12A.
  • the strip 11 is moved back by one adjustment step (in the direction indicated by the arrow R) into the position illustrated in Figure 11, so as to enable interpenetration, as much as possible, of the shape 12B within the shape of the punch 17, i.e., so as to identify the same minimum distance "d" indicated in Figure 8.
  • a third blank can thus be cut, with the minimum waste of material possible, and so forth, according to the same modalities as those described previously with reference to Figures 5-10.
  • the extractors 19, 20 terminate in a magnetic head 22 and are characterized by a combined motion of rotation and translation by means of an actuator 23 and a bushing 32 with a spiral 33 engaged by a radial pin 34 ( Figure 21). It thus emerges clearly how there will correspond to the translation in the directions indicated by the arrow F3 of the transfer 19 also a rotation of the said transfer through the action of the bushing 32, which is set in rotation by the combined action of the spiral 33 and of the radial pin 34.
  • the punches 17, 18 are moved, alternately, into their raised operative position and lowered inoperative position by means of a carriage 24, which is moved backwards and forwards in the directions indicated by the arrow F2 by means of an actuator 25.
  • the carriage 24 has a working surface that moves up and down acting on a complementary surface of said punches 17, 18. More precisely, said working surface that moves up and down of the carriage 24 comprises inclined planes 26 which are separated from one another by a rectilinear stretch 27 and are convergent in a top or crest resting surface 28 for resting of the punches 17,18, which, at the bottom, are shaped in a complementary way, as clearly illustrated in the drawings.
  • the translation of the carriage 24 is guided by means of lateral guides 29.
  • the assemblies 15, 16 are comprised between a base 30 and a crown 31 of the die 14.
  • moving of the blanks S1, S2 outside the die 14 is obtained by means of raising and rotating said blanks S1, S2 in the context of the same operation of die-cutting and of the same processing station which comprises said die 14, so that the rotated piece can be moved directly to a subsequent processing station without any dead spaces and/or long distances between one station and another.
  • the advantages of the invention can be summarized in the elimination of idle steps of the strip 11, in the execution of shorter steps of the said strip 11, in a processing station, and hence a machine, that is more compact, in a higher rate of production, and consequently in a lower cost of the plant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Punching Or Piercing (AREA)
EP02079386A 2001-11-07 2002-10-22 Procédé et dispositif de découpage successif d'un semi-fini ou d'une ébauche à partir d'une bande métallique Withdrawn EP1316373A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20012329 ITMI20012329A1 (it) 2001-11-07 2001-11-07 Metodo ed apparato per la tranciatura in successione da nastro metallico di un semilavorato o di uno sbozzato
ITMI20012329 2001-11-07

Publications (1)

Publication Number Publication Date
EP1316373A1 true EP1316373A1 (fr) 2003-06-04

Family

ID=11448577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02079386A Withdrawn EP1316373A1 (fr) 2001-11-07 2002-10-22 Procédé et dispositif de découpage successif d'un semi-fini ou d'une ébauche à partir d'une bande métallique

Country Status (2)

Country Link
EP (1) EP1316373A1 (fr)
IT (1) ITMI20012329A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2543450A1 (fr) * 2011-07-08 2013-01-09 Cie Automotive, S.A. Machine et procédé à decouper de parties de tôles
CN114683352A (zh) * 2020-12-27 2022-07-01 昊佰电子科技（上海）有限公司 一种组合刀模及其使用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1138931A (en) * 1966-03-02 1969-01-01 Karlsruhe Augsburg Iweka Apparatus for punching sheet material
GB1193666A (en) * 1966-10-14 1970-06-03 Schuler G M B H L Punching Device for Presses.
US4708042A (en) * 1985-04-26 1987-11-24 Schon & Cei, GmbH Punching machine
EP0661118A1 (fr) * 1993-12-14 1995-07-05 DI.GI.EMME S.r.l. Procédé de découpage d'une ébauche d'une bande métallique pour la fabrication d'une charnière pour les meubles
EP0770436A1 (fr) * 1995-10-27 1997-05-02 DI.GI.EMME S.r.l. Procédé de découpage d'une ébauche d'une bande métallique pour la fabrication de composants en métal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1138931A (en) * 1966-03-02 1969-01-01 Karlsruhe Augsburg Iweka Apparatus for punching sheet material
GB1193666A (en) * 1966-10-14 1970-06-03 Schuler G M B H L Punching Device for Presses.
US4708042A (en) * 1985-04-26 1987-11-24 Schon & Cei, GmbH Punching machine
EP0661118A1 (fr) * 1993-12-14 1995-07-05 DI.GI.EMME S.r.l. Procédé de découpage d'une ébauche d'une bande métallique pour la fabrication d'une charnière pour les meubles
EP0770436A1 (fr) * 1995-10-27 1997-05-02 DI.GI.EMME S.r.l. Procédé de découpage d'une ébauche d'une bande métallique pour la fabrication de composants en métal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2543450A1 (fr) * 2011-07-08 2013-01-09 Cie Automotive, S.A. Machine et procédé à decouper de parties de tôles
CN114683352A (zh) * 2020-12-27 2022-07-01 昊佰电子科技（上海）有限公司 一种组合刀模及其使用方法
CN114683352B (zh) * 2020-12-27 2023-12-01 上海昊佰智造精密电子股份有限公司 一种组合刀模及其使用方法

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