EP2916974B1 - Stanzmaschine - Google Patents

Stanzmaschine Download PDF

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Publication number
EP2916974B1
EP2916974B1 EP13818405.6A EP13818405A EP2916974B1 EP 2916974 B1 EP2916974 B1 EP 2916974B1 EP 13818405 A EP13818405 A EP 13818405A EP 2916974 B1 EP2916974 B1 EP 2916974B1
Authority
EP
European Patent Office
Prior art keywords
punching machine
work table
movable section
punching
punched
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.)
Active
Application number
EP13818405.6A
Other languages
English (en)
French (fr)
Other versions
EP2916974A1 (de
Inventor
Eugenio Lenzotti
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.)
Euromac SpA
Original Assignee
Euromac SpA
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Publication date
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Publication of EP2916974A1 publication Critical patent/EP2916974A1/de
Application granted granted Critical
Publication of EP2916974B1 publication Critical patent/EP2916974B1/de
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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
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools

Definitions

  • the invention relates to a punching machine, which is generally used for punching metal sheets and other items made of several materials, and is able to convey the punched items toward the processing lines, sorted by size.
  • a punching machine is known to comprise a base that supports a work table and an operating head that extends above the work table and carries a plurality of punches, which are adapted to be actuated as needed by a pressure cylinder accommodated in the operating head.
  • a die is known to be placed within the work table in vertically aligned relationship to the operating head, and to carry counter-punches which cooperate with the corresponding upper punches for punching metal sheets or other items.
  • the work table is equipped with a gripper assembly with moving grippers that grasp the sheet, typically at one edge thereof, and systematically move it between the operating head and the counter-punch die, for carrying out punching operations according to a program that is preset in a programmable electronic memory that is typically present in a punching machine.
  • a punching machine when carries out punching operations, e.g. in a sheet of metal or another material, it creates a plurality of workpieces with a predetermined and programmable contour which, after forming, are still attached to the original sheet by means of thin connecting bridges, that are purposely formed during punching to prevent the workpieces from separating from the original metal sheet after forming and punching, and fall onto the work table in a messy heap.
  • the entire metal sheet has been punched according to an operating program, it is discharged from the work table either by an operator or by specially designed automatic gripping and displacing devices.
  • the operator manually collects the separated workpieces and, after sorting them by size, discharges them onto respective conveyors that will transfer them to further workstations.
  • a first drawback is that the action of an operator or a special automatic gripping and displacing device is required both for picking up the workpieces from the work table and depositing them onto a conveyor for transfer to other work destinations, and for separating the formed workpieces from the base metal sheet.
  • a second drawback is that the operator shall also manually remove the residual portion of the metal sheet from which the formed workpieces have been separated, to clear the work table for a new punching step.
  • the metal sheets that may be used for forming workpieces using punching machines often have large perimeter dimensions, some having 1000 x 1000 mm long sides or even more, and that their thicknesses range from a few tenths of a millimeter to a few millimeters, whereby these metal sheets are quite heavy for manual or automatic handling, both for preparing them to punching and for removing them after punching.
  • a third drawback is that, once the operator has cut the bridges, apparent traces of the latter remain on the workpieces as flashes that, though small, require further finishing to remove these flashes and any trace thereof.
  • a further drawback of prior art punching machines is that the finished workpieces separated from the base metal sheets that can be discharged from the work table have a size of not more than 500 x 500 mm.
  • the object of the invention is to improve the prior art.
  • Another object of the invention is to provide a punching machine that requires no manual action by the operators, and no automatic devices for handling and removing the sheets of material, or the semi-finished items to be punched.
  • a further object of the invention is to provide a punching machine that allows the formed workpieces to be automatically conveyed in selectable discharge directions, which can be particularly selected according to their size.
  • Another object of the invention is to provide a punching machine that forms workpieces without requiring additional finishing operations.
  • the invention relates to a punching machine as defined in the features of claim 1.
  • numeral 1 designates the base of a punching machine.
  • the base 1 comprises a support frame 2, that supports a work table 3 on which items in sheet form 5 to be punched have to be laid and displaced.
  • the displacement of sheet items 5 occurs by means of a moving gripper device 3c in the work table 3, which is designed to grasp and release the sheet items 50 and place them under the punching devices.
  • a horizontal support surface 4 is defined in the work table 2 and has a die therein accommodating a series of counter-punches 6 that cooperate with corresponding punches held within an operating head 7, as is typically provided in a punching machine.
  • Both the punches and the counter punches may be arranged within respective housing devices, known as punch holders, which contain a predetermined number thereof, each being automatically selectable as needed.
  • the punches, the punch holders and the dies form together the above mentioned punching devices.
  • An opening 8 is formed in the work table 3, for receiving a movable section 9 that can move in two directions of movement, namely a direction of translation coplanar with the work table 3 and a direction of inclination to the latter, as better described below.
  • the opening 8 has a quadrangular perimeter and the movable section 9 also has a quadrangular perimeter, such that the perimeter sides of both are mutually parallel.
  • Figure 3 shows that one of the sides of the movable section 9, namely the side that is considered as the front side, as it is parallel to the front edge 3a of the work table 3 and designated by numeral 10, has a recess 10a, whose purpose will be described below.
  • the movable section 9 is mounted to slide guide means 11 and is slidably driven between a punch position and a discharge position, for discharging the punched workpieces having a restricted size, the term restricted size being intended to designate a size of the order of 200 x 200 mm or less.
  • the movable section 9 is driven for horizontal displacement by a fluid-dynamic actuator unit 12 which is interposed between one rear side 13 of the movable section 9, opposite to the front side 10, and the frame 2.
  • the movable section 9, for discharging formed and punched workpieces having a large size, i.e. larger than that the above mentioned size, is also adapted to be inclined in a direction of inclination, as shown in Figures 2 , 6 , 7 , by pivoting about hinges (or guides) 14, with parallel and coaxial axes of rotation, oriented perpendicular to the front 10 and rear 13 sides of the movable section 9.
  • the direction of inclination of the movable section 9 allows the latter to pivot toward the underlying part of the work table 3 to discharge the large punched and formed workpieces onto an evacuation conveyor 15 which is arranged in the base 1 for this purpose.
  • the inclination movement of the movable section 9 is obtained using an actuator unit, not shown but known to the skilled person.
  • a chute 16 is also shown below the work table 3, in vertically aligned relationship to the recess 10a, for conveying punched and formed workpieces having a small size, toward a collection container located at the discharge edge of the chute 16 and adapted to be removed for cyclic discharge.
  • the length of the movable section 9 between the two front 10 and rear 13 sides is smaller than the corresponding length of the opening 8, to allow the movable section 9 to move therein between a punch position and a discharge position.
  • the movable section 9 is shown in the punch position, in which it extends the support surface 4 in substantially seamless fashion, whereas in Figures 3 and 4 the movable section 9 is shown in a displaced position toward the rear portion of the opening 8, i.e. the rear edge 3b of the work table 3, and opens a passage 18 through which the small punched and formed workpieces may fall and be conveyed from the chute 16 into the collection container 17.
  • the movable section 9 consists of a plurality of rollers 19, powered by a motor unit 20, which are supported in parallel relationship, between the front side 10 and the rear side 13, thereby forming a movable surface 9a which, when the movable section 9 is in the punch position or in a small-workpiece discharge position, is substantially coplanar with the support surface 4 of the work table 3.
  • Handling of particularly large workpieces 5, as shown in Figure 8 may be also ensured, in a second embodiment of the invention, by also forming the end portion of the support surface 4 by additional rollers 19', identical to those that are part of the movable section 9.
  • rollers 19' are rotatably driven by a motor unit 20' and form, with the rollers 19 of the movable section 9, a moving carpet, allowing particularly long workpieces to slide thereon toward a lateral discharge edge 3c of the work table 3.
  • the movable section 9 has three operating positions overall, i.e. a punch position, in which it is entirely displaced toward the front edge 3a of the work table 3, a large-workpiece discharge position, in which it still remains in the punch position, but is pivoted toward a lower portion of the work table 3, and a small-workpiece discharge position, in which it is coplanar with the support surface 4, but retracted toward the rear side 13, thereby forming the passage 18.
  • the selection of the work positions of the movable section 9 is automatically made by the electronic program of a computer that controls the operation of the punching machine according to the working cycle that has been set, to obtain small- or large-sized punched and formed workpieces.
  • the movable section 9 is held in the normal punching position, i.e. coplanar with the support surface 4 of the work table 3 during completion of the punching steps and then, each time a punching cycle is completed, it is rotated toward the underlying portion of the work table 3 to discharge the large-sized punched and formed workpieces onto the conveyor 15.
  • the discharge step is facilitated by rotating the powered rollers 19 that turn the support surface of the movable section 9 into a moving carpet.
  • the rollers 19 In order to reduce friction with the punched workpieces to be discharged, the rollers 19 have radial and flexible bristles on their respective outer surfaces, to provide a point-like contact between the latter and the lower surface of each punched workpiece.
  • the work table 3 When dealing with very large punched and formed workpieces, e.g. having a size of 1,000 x 3,000 mm, the work table 3 consists of a substantially seamless succession of the rollers 19' that form a substantially continuous moving carpet and the rollers 19 of the movable section 9, the latter being powered to provide a motorized carpet for moving these very large workpieces toward the lateral discharge edge 3c.
  • the movable section 9 is caused to slide to a programmed extent toward the rear edge 3b of the work table 3, thereby creating the passage 18.
  • This passage which is considerably wider at the recess 10a of the front side 10, is used to drop the small workpieces onto the underlying chute 16, that conveys them into the collection container 17.
  • the invention was found to fulfill the intended objects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)
  • Press Drives And Press Lines (AREA)

Claims (11)

  1. Stanzmaschine, die umfasst:
    - eine Basis (1), die einen Arbeitstisch (3) aufweist, der eine horizontale Auflagefläche (4) definiert, auf der ein zu stanzender Artikel (5) platziert werden soll, um gestanzte Artikel zu erhalten;
    - einen Betriebskopf, der auf dem Arbeitstisch (3) angeordnet und mit Stanzmitteln zum Stanzen des Artikels ausgestattet ist;
    wobei der Arbeitstisch (3) mindestens eine Öffnung (8) mit einem Umkreis umfasst, an dessen Innenseite ein beweglicher Abschnitt (9) des Arbeitstisches (3) eingesetzt ist, der eine ergänzende bewegliche Oberfläche (9a) der Auflagefläche (4) definiert und der durch Bewegungsmittel (11, 12) zwischen einer Stanzposition und einer Herunterladeposition der gestanzten Artikel bewegt werden kann, dadurch gekennzeichnet, dass der bewegliche Abschnitt (9) Bewegungsmittel (11, 12) in einer koplanaren Ausbildung mit dem Arbeitstisch (3) aufweist.
  2. Stanzmaschine nach Anspruch 1, wobei der bewegliche Abschnitt (9) Neigungsmittel (14) in eine Neigungsrichtung um eine Drehachse in Bezug auf den Arbeitstisch (3) umfasst.
  3. Stanzmaschine nach Anspruch 1 oder 2, wobei der bewegliche Abschnitt (9) mindestens eine Dimension aufweist, die kleiner ist als eine entsprechende Dimension der Öffnung (8), um so einen Herunterladedurchlass (18) zwischen der Auflagefläche (4) des Arbeitstisches (3) und einer unteren Zone des letztgenannten in der Herunterladeposition zu definieren.
  4. Stanzmaschine nach einem der vorstehenden Ansprüche, wobei der bewegliche Abschnitt (9) eine Vielzahl von parallelen Walzenmitteln (19) umfasst, die Drehachsen parallel zur Auflagefläche (4) des Arbeitstisches (3) aufweisen und die bewegliche Oberfläche (9a) definieren.
  5. Stanzmaschine nach Anspruch 4, wobei die Walzenmittel eine Vielzahl von sich auf- und abwärts bewegender Walzen (19) umfassen und durch Antriebsmittel (20) in Drehung versetzt werden, wobei die Walzen (19) an ihren Außenflächen mit nach außen ragenden, flexiblen Borsten ausgestattet sind, die die bewegliche Oberfläche (9a) definieren.
  6. Stanzmaschine nach Anspruch 3, wobei in der unteren Zone Sammel- und Transportmittel (15, 17) fern der Basis (1) untergebracht sind.
  7. Stanzmaschine nach Anspruch 1, wobei der Umkreis viereckig ist und eine Vorderseite, die dem Betriebskopf zugewandt ist und eine gegenüberliegende Rückseite aufweist.
  8. Stanzmaschine nach einem der Ansprüche 1 und 6, wobei der bewegliche Abschnitt (9) eine viereckige Plattform umfasst, mit Seiten, die zu den Seiten des viereckigen Umkreises parallel sind, und die in der Innenseite des letztgenannten enthalten ist, die abwechselnd zwischen der Stanzposition und der Herunterladeposition beweglich ist.
  9. Stanzmaschine nach einem der vorstehenden Ansprüche, wobei eine Vorderseite (10) des beweglichen Abschnitts (9) eine hindurchgehende Vertiefung (10a) für gestanzte Artikel aufweist.
  10. Stanzmaschine nach Anspruch 10, wobei die Bewegungsmittel umfassen:
    - horizontale Führungsmittel (11), an welchen Gleitmittel, die an dem beweglichen Abschnitt (9) fixiert sind, gleitfähig angeordnet sind, und
    - Betätigungsmittel (12), die zwischen der Basis (1) und dem beweglichen Abschnitt (9) eingesetzt sind.
  11. Stanzmaschine nach einem der vorstehenden Ansprüche, wobei unter dem Arbeitstisch (3) eine Kanalisierungsrutsche (16) der gestanzten Artikel zu den Sammel- und Transportmitteln (15, 17) angeordnet ist.
EP13818405.6A 2012-10-22 2013-10-22 Stanzmaschine Active EP2916974B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000256A ITMO20120256A1 (it) 2012-10-22 2012-10-22 Macchina punzonatrice
PCT/IB2013/059529 WO2014064604A1 (en) 2012-10-22 2013-10-22 Punching machine

Publications (2)

Publication Number Publication Date
EP2916974A1 EP2916974A1 (de) 2015-09-16
EP2916974B1 true EP2916974B1 (de) 2019-10-30

Family

ID=47471925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13818405.6A Active EP2916974B1 (de) 2012-10-22 2013-10-22 Stanzmaschine

Country Status (5)

Country Link
EP (1) EP2916974B1 (de)
CN (1) CN105050746B (de)
IT (1) ITMO20120256A1 (de)
RU (1) RU2015119150A (de)
WO (1) WO2014064604A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119427716B (zh) * 2025-01-08 2026-04-10 江苏玉河教玩具有限公司 一种塑料玩具生产用冲床设备及其方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4690021A (en) * 1977-07-15 1987-09-01 Strippit/Di-Acro-Houdaille, Inc. Automatic load unload turret punch
US4889968A (en) * 1987-04-30 1989-12-26 Amada Company, Limited Laser-punch composite processing machine
JPH0871672A (ja) * 1994-09-06 1996-03-19 Amada Co Ltd パンチングプレス機のシュータテーブル傾動装置およびその装置を用いた傾動方法
JP3442590B2 (ja) * 1995-11-20 2003-09-02 株式会社アマダ パンチング加工機およびその加工方法
JPH1019877A (ja) * 1996-06-27 1998-01-23 Sumitomo Metal Ind Ltd 鋼帯の連続処理ラインにおけるサンプル板の採取方法
JPH10118879A (ja) * 1996-10-21 1998-05-12 Amada Co Ltd テ−ブルシュ−タ−装置
ATE507910T1 (de) * 2007-06-30 2011-05-15 Trumpf Werkzeugmaschinen Gmbh Werkzeugmaschine und verfahren zum verbringen eines werkstückteils aus einer auflageposition in eine abfuhrposition
EP2359952B1 (de) * 2010-07-09 2012-09-12 TRUMPF Werkzeugmaschinen GmbH + Co. KG Vorrichtung und Verfahren zum Ausschleusen von verschiedenen Bearbeitungsprodukten an einer Werkzeugmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN105050746B (zh) 2017-03-15
RU2015119150A (ru) 2016-12-10
CN105050746A (zh) 2015-11-11
WO2014064604A1 (en) 2014-05-01
ITMO20120256A1 (it) 2014-04-23
EP2916974A1 (de) 2015-09-16

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