EP1417054B1 - Punching machine for sheet metal strip - Google Patents

Punching machine for sheet metal strip Download PDF

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Publication number
EP1417054B1
EP1417054B1 EP20020758372 EP02758372A EP1417054B1 EP 1417054 B1 EP1417054 B1 EP 1417054B1 EP 20020758372 EP20020758372 EP 20020758372 EP 02758372 A EP02758372 A EP 02758372A EP 1417054 B1 EP1417054 B1 EP 1417054B1
Authority
EP
European Patent Office
Prior art keywords
plate
carriage
strip
machine
punching machine
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
EP20020758372
Other languages
German (de)
French (fr)
Other versions
EP1417054A1 (en
Inventor
Sergio Dallan
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.)
Dallan SpA
Original Assignee
Dallan 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 Dallan SpA filed Critical Dallan SpA
Publication of EP1417054A1 publication Critical patent/EP1417054A1/en
Application granted granted Critical
Publication of EP1417054B1 publication Critical patent/EP1417054B1/en
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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • B21D28/265—Perforating, i.e. punching holes in sheets or flat parts with relative movement of sheet and tools enabling the punching of holes in predetermined locations of the sheet, e.g. holes punching with template

Definitions

  • This invention relates to a punching machine for sheet metal strip.
  • Punching machines in metal strip processing lines are known. They generally comprise punching heads, the tools (punches) of which are driven, in accordance with the predetermined operative cycle, by hydraulic cylinders applied to the head itself and acting on the metal strip to be processed, which advances between said punches and the respective dies.
  • the strip is advanced by a feed device controlled by a central control unit, as are the punch operating cylinders.
  • the punch heads consist essentially of a thick metal plate which is disposed vertically and cut to ring shape to display a horizontal slot for passage of the strip to be processed.
  • the punches and the respective operating cylinders are applied to one or both the sides of the upper part of this ring-shaped plate, the dies being applied to the lower part.
  • a drawback of these heads is a substantial cost due to the operating cylinders, the number of which corresponds to the number of punches used, as stated.
  • heads comprising a loader for a plurality of punches positioned below a single cylinder provided with a piston rod with a rotary selector.
  • An object of the invention is to eliminate this drawback by providing a punching machine having high versatility while using only a small number of processing means.
  • the punching machine comprises substantially a bed 2 for a carriage 4 provided with slide blocks 6 for its sliding along guides 8 disposed transversely to the bed.
  • the carriage also presents a horizontal slot 18 faced by two C-shaped thick vertical metal plates 20, 20', with their cavities facing each other.
  • Each plate 20, 20' is rigid with a horizontal plate 22 rigid with the piston rod 24 of a hydraulic cylinder-piston unit 26 mounted on the carriage.
  • each vertical plate 20' there is applied a loader 28 carrying punches 30 which are faced by corresponding dies 32 provided on the lower side of the plate.
  • the piston rod 34 of a rotary selector cylinder 36 rigid with the carriage acts selectively on the heads of said punches.
  • a control unit (not shown in the drawing) for controlling the advancement and movement of the strip, of the carriage 2 and of the plates 20, 20' and for controlling the operation of the cylinder 36 is associated with the machine.
  • the punching machine operates in the following manner:

Abstract

A punching machine for metal strip characterised by comprising: a carriage (4) movable transversely to the longitudinal axis of the machine and provided with a horizontal slot (18) through which the strip (38) to be processed passes; a vertical plate (20, 20') provided with a horizontal slot through which the strip to be processed passes, on the upper side of said plate there being provided at least two loaders (28) carrying punches (30) faced by corresponding dies (32) provided on the lower side of said plate; means (24, 26) for moving said plate relative to said carriage; a multiple selector actuator (34, 36) rigid with the carriage (4); a control unit for controlling the movements of said strip, of said carriage and of said plate, and for controlling the operation of said actuator.

Description

This invention relates to a punching machine for sheet metal strip.
Punching machines in metal strip processing lines are known. They generally comprise punching heads, the tools (punches) of which are driven, in accordance with the predetermined operative cycle, by hydraulic cylinders applied to the head itself and acting on the metal strip to be processed, which advances between said punches and the respective dies.
The strip is advanced by a feed device controlled by a central control unit, as are the punch operating cylinders.
The punch heads consist essentially of a thick metal plate which is disposed vertically and cut to ring shape to display a horizontal slot for passage of the strip to be processed.
The punches and the respective operating cylinders are applied to one or both the sides of the upper part of this ring-shaped plate, the dies being applied to the lower part.
A drawback of these heads is a substantial cost due to the operating cylinders, the number of which corresponds to the number of punches used, as stated.
To eliminate this drawback, it has already been proposed to use heads comprising a loader for a plurality of punches positioned below a single cylinder provided with a piston rod with a rotary selector.
These heads have however the drawback of poor versatility as the number of punches usable is limited.
An object of the invention is to eliminate this drawback by providing a punching machine having high versatility while using only a small number of processing means.
This and other objects which will be apparent from the ensuing description are attained according to the invention by a punching machine for metal strip as described in claim 1.
The principle of invention is described in detail hereinafter with reference to the accompanying drawing showing a cross-section through a punching machine according to an embodiment of the invention.
As can be seen from the drawing, the punching machine according to a preferred embodiment of the invention comprises substantially a bed 2 for a carriage 4 provided with slide blocks 6 for its sliding along guides 8 disposed transversely to the bed.
To the carriage, which is also guided along a bar 10 rigid with the base walls, there is fixed a female screw 12 engaged by a screw 14 rotated by an electric motor 16 applied to the bed,
The carriage also presents a horizontal slot 18 faced by two C-shaped thick vertical metal plates 20, 20', with their cavities facing each other.
Each plate 20, 20' is rigid with a horizontal plate 22 rigid with the piston rod 24 of a hydraulic cylinder-piston unit 26 mounted on the carriage.
To the upper side of each vertical plate 20, 20' there is applied a loader 28 carrying punches 30 which are faced by corresponding dies 32 provided on the lower side of the plate.
The piston rod 34 of a rotary selector cylinder 36 rigid with the carriage acts selectively on the heads of said punches.
A control unit (not shown in the drawing) for controlling the advancement and movement of the strip, of the carriage 2 and of the plates 20, 20' and for controlling the operation of the cylinder 36 is associated with the machine.
The punching machine operates in the following manner:
  • the sheet metal strip unwound from a reel and advanced by drive rollers is inserted through the slot 18 in the carriage and the slot in the vertical plates 20, 20'. The carriage is moved transversely on the basis of the punching program, driven by the engagement between the screw 12 and the corresponding female screw 14 such as to position both the loader 28 carrying the punches 30, and the dies 32 to be activated, exactly in correspondence with that strip region in which punching is to be effected. The synchronized action between the drive rollers, the members controlling the strip advancement and the activation of the unit ensures that the punching process is correctly effected.
    • In the case of large-width strips not only is the carriage 4 moved transversely to the bed 2 but, by using the hydraulic cylinder-piston units 26, the plates 20, 20' are moved relative to the carriage, such that the loader 28 of one plate 20 or of the other plate 20' is positioned below the cylinder 36.
    During processing; while the punches of one of the plates are under operation by the cylinder, it is also possible to move the other plate by using the hydraulic cylinder-piston unit 26, in such a manner as to be able to replace the loader with another carrying different punches.

    Claims (3)

    1. A punching machine for metal strip characterised by comprising:
      a carriage (4) movable transversely to the longitudinal axis of the machine and provided with a horizontal slot (18) through which the strip (38) to be processed passes,
      a vertical plate (20, 20') provided with a horizontal slot through which the strip to be processed passes, on the upper side of said plate there being provided at least two loaders (28) carrying punches (30) faced by corresponding dies (32) provided on the lower side of said plate,
      means (24, 26) for moving said plate relative to said carriage,
      a multiple selector actuator (34, 36) rigid with the carriage (4),
      a control unit for controlling the movements of said strip, of said carriage and of said plate; and for controlling the operation of said actuator.
    2. A machine as claimed in claim 1, characterised in that said vertical plate is formed in two parts, each of which is C-shaped with their cavities facing each other.
    3. A machine as claimed in claim 1, characterised in that the means for moving said plate consist of hydraulic cylinder-piston units.
    EP20020758372 2001-08-13 2002-07-22 Punching machine for sheet metal strip Expired - Lifetime EP1417054B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    IT2001VE000018U ITVE20010018U1 (en) 2001-08-13 2001-08-13 PUNCHING MACHINE FOR SHEET METAL TAPES
    ITVE20010018U 2001-08-13
    PCT/EP2002/008129 WO2003015953A1 (en) 2001-08-13 2002-07-22 Punching machine for sheet metal strip

    Publications (2)

    Publication Number Publication Date
    EP1417054A1 EP1417054A1 (en) 2004-05-12
    EP1417054B1 true EP1417054B1 (en) 2004-10-27

    Family

    ID=11461064

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP20020758372 Expired - Lifetime EP1417054B1 (en) 2001-08-13 2002-07-22 Punching machine for sheet metal strip

    Country Status (6)

    Country Link
    EP (1) EP1417054B1 (en)
    AT (1) ATE280644T1 (en)
    DE (1) DE60201759T2 (en)
    ES (1) ES2230511T3 (en)
    IT (1) ITVE20010018U1 (en)
    WO (1) WO2003015953A1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    ITUA20164805A1 (en) * 2016-06-30 2017-12-30 Dallan Spa PUNCHING MACHINE AND METHOD FOR REALIZING VENTILATION HOLES ON SHUTTER PROFILES

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CZ16341U1 (en) * 2006-01-27 2006-03-06 Zebr S. R. O. Device for punching of holes in endless thin-walled strip
    IT1391092B1 (en) * 2008-08-01 2011-11-18 Produtech S R L MACHINE PERFECTED TO PERFORM CUTTING, PUNCHING AND SHEETING OF SHEETS.
    ITVE20120038A1 (en) * 2012-10-11 2014-04-12 Dallan Spa PUNCHING DEVICE FOR PUNCHING MACHINES.-
    ITVE20130049A1 (en) * 2013-09-20 2015-03-21 Dallan Spa PUNCHING HEAD FOR PUNCHING MACHINES.-
    EP2952270A1 (en) * 2014-06-05 2015-12-09 Eae Makina Sanayi ve Ticaret Anonim Sirketi Punch machine with sheet metal roll feed

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5193426A (en) * 1991-08-19 1993-03-16 Dunn David C Linear type punch press
    IT1287112B1 (en) * 1996-10-31 1998-08-04 Bruni Vincenzo SHEET METAL PUNCHING MACHINE
    IT1296923B1 (en) * 1997-12-05 1999-08-03 Salvagnini Italia Spa PERFECTED SHEET METAL PANEL PUNCHING MACHINE

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    ITUA20164805A1 (en) * 2016-06-30 2017-12-30 Dallan Spa PUNCHING MACHINE AND METHOD FOR REALIZING VENTILATION HOLES ON SHUTTER PROFILES
    EP3266973A1 (en) * 2016-06-30 2018-01-10 Dallan S.p.A. Punching machine and method for making ventilation holes on roller shutter profiles

    Also Published As

    Publication number Publication date
    WO2003015953A1 (en) 2003-02-27
    DE60201759D1 (en) 2004-12-02
    ATE280644T1 (en) 2004-11-15
    DE60201759T2 (en) 2005-12-15
    ITVE20010018U1 (en) 2003-02-13
    EP1417054A1 (en) 2004-05-12
    ES2230511T3 (en) 2005-05-01

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