EP2094413B1 - Abstreifvorrichtung für stanze - Google Patents

Abstreifvorrichtung für stanze Download PDF

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Publication number
EP2094413B1
EP2094413B1 EP20070819573 EP07819573A EP2094413B1 EP 2094413 B1 EP2094413 B1 EP 2094413B1 EP 20070819573 EP20070819573 EP 20070819573 EP 07819573 A EP07819573 A EP 07819573A EP 2094413 B1 EP2094413 B1 EP 2094413B1
Authority
EP
European Patent Office
Prior art keywords
punch
stripper
punch stripper
cross
pressure
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
EP20070819573
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English (en)
French (fr)
Other versions
EP2094413A1 (de
Inventor
Fredrik Ekman
Patrik Stoltz
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.)
Stromsholmen AB
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Stromsholmen AB
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
Priority claimed from SE0602363A external-priority patent/SE530555C2/sv
Application filed by Stromsholmen AB filed Critical Stromsholmen AB
Publication of EP2094413A1 publication Critical patent/EP2094413A1/de
Application granted granted Critical
Publication of EP2094413B1 publication Critical patent/EP2094413B1/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
    • 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
    • B21D45/006—Stripping-off devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/2135—Moving stripper timed with tool stroke
    • Y10T83/215—Carried by moving tool element or its support
    • Y10T83/2155—Stripper biased against product
    • Y10T83/2159—By spring means

Definitions

  • a first type has a built-in mechanical spring and a second type has a polyurethane element adapted to generate the stripping force. Both variants are associated with problems and limitations.
  • Punch strippers with a mechanical spring operate by the mechanical spring, whose inner diameter is concentric with the outer diameter of the punch body, being mounted between a stripper part and an end part, thus exerting a pressure on the unit.
  • the stripper part has two outer diameters, one at the point of punching and one at the end of the spring. Both surfaces guide the stripper part during its working stroke.
  • the stripper part has a plane, machined surface to prevent it from rotating.
  • the punch stripper is designed as an integrated unit that can be replaced in connection with maintenance. If a larger or smaller stripping force is desired, the springs are replaced. Since needs vary, there are a large number of different springs to choose from. In addition, the user has to know how much force is required for the punching operation. In case of doubt, several spring variants and settings may be needed before the correct force is obtained. A further limitation is the useful life of mechanical springs, which may be slightly too short to meet the increasing demands in the sheet metal forming industry.
  • Punch strippers with a polyurethane element operate in a similar manner. They come in two variants. One operates in the same manner as punch strippers provided with a mechanical spring, but instead of a mechanical spring they use a polyurethane element. The other operates by the polyurethane forming the entire punch stripper.
  • the two designs may seem simple, but the polyurethane elements must be adapted to the stripping force required to perform the intended function.
  • the user has to know both the length to be used and the dimension/initial load intended to provide the desired force.
  • the useful life of polyurethane elements is generally shorter than that of mechanical springs. Thus, the useful life is a greater limitation for polyurethane.
  • a larger initial force can be obtained.
  • the larger force can be used to improve the punch performance in high-strength sheet metal; however, this is not required.
  • gas spring technology By employing gas spring technology and forming the pressure chamber between the inner sleeve and the outer sleeve assembly, a more compact assembly than existing assemblies can be obtained; however, this is not required.
  • the more compact assembly is advantageous since there is often little available space in today's press tools.
  • the stripping force required can be easily altered and a minimal number of variants of the punch stripper can be achieved; however, this is not required.
  • a press tool that includes at least two punch strippers; however, this is not required.
  • the respective pressure chambers of the at least two punch strippers may be in fluid communication with one another in order to maintain substantially the same pressure in the respective pressure chambers of the at least two punch strippers; however, this is not required.
  • the advantage of this arrangement is that an operator only has to charge the gas in one place without dismantling the punch stripper from the retainer; however, this is not required.
  • the gas pressure can be regulated in all punch strippers at the same time in a simple and flexible manner; however, this is not required.
  • the stripper that is adapted to be fastened to a punch retainer of a press tool that includes a punch stripper piston, and a pressure chamber adapted to spring-load the punch stripper piston; however, this is not required.
  • An indicating arrangement can be provided to indicate a pressure in the pressure chamber; however, this is not required.
  • the indicating arrangement is adapted to indicate whether the pressure in the pressure chamber exceeds and/or falls below a predetermined value; however, this is not required.
  • the indicating arrangement is an integral part with the punch stripper; however, this is not required.
  • the indicating arrangement includes a spring-loaded part which is visible from an outside of the punch stripper; however, this is not required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (17)

  1. Stanzenabstreifvorrichtung (10), dazu angepasst, an einer Stanzenaufnahme (2) eines Presswerkzeuges (3a, 3b) befestigt zu werden, aufweisend eine Stanze (1), einen Stanzenabstreifvorrichtungskolben (11) und eine Druckkammer (12a, 12b), wobei die Druckkammer (12a, 12b) dazu ausgelegt ist, den Stanzenabstreifvorrichtungskolben (11) unter Vorspannung zu setzen; wobei die Druckkammer (12a, 12b) zumindest teilweise durch einen Spalt zwischen einer inneren Hülse (13) und einer äußeren Hülse (14) definiert ist; wobei der Stanzenabstreifvorrichtungskolben (11) einen verlagerbaren Bereich (11b) hat, der axial in dem Spalt verlagerbar ist, wobei die gesamte Druckkammer (12a, 12b) zwischen der inneren Hülse (13) und der äußeren Hülse (14) angeordnet ist,
    dadurch gekennzeichnet, dass
    die Druckkammer (12a, 12b) ferner einen Führungsbereich (12a) und einen Kammerbereich (12b) aufweist, wobei der Führungsbereich (12a) dazu ausgelegt ist, den verlagerbaren Bereich (11b) des Stanzenabstreifvorrichtungskolbens zu ermöglichen, sich darin zu bewegen, wobei der Kammerbereich (12b) axial von dem Führungsbereich (12a) separiert ist, wobei der Kammerbereich (12b) eine größere Querschnittsfläche hat als der Führungsbereich (12a).
  2. Stanzenabstreifvorrichtung nach Anspruch 1, wobei die äußere Hülse (14) einen ersten Bereich und einen zweiten Bereich hat, wobei der erste Bereich einen ersten inneren Querschnitt hat, der eine Grenzfläche des Führungsbereichs (12a) der Druckkammer (12a, 12b) bildet, wobei der zweite Bereich einen zweiten inneren Querschnitt hat, wobei zumindest ein Bereich des zweiten inneren Querschnitts größer ist als mindestens ein Bereich des ersten inneren Querschnitts, wobei der zweite Bereich eine Grenzfläche des Kammerbereichs (12b) der Druckkammer (12a, 12b) bildet.
  3. Stanzenabstreifvorrichtung (10) nach Anspruch 2, wobei der erste innere Querschnitt eine gemittelte Querschnittsfläche hat, wobei der zweite innere Querschnitt eine gemittelte Querschnittsfläche hat, wobei die gemittelte Querschnittsfläche des zweiten inneren Querschnitts größer ist als die gemittelte Querschnittsfläche des ersten inneren Querschnitts.
  4. Stanzenabstreifvorrichtung (10) nach Anspruch 3, wobei der erste innere Querschnitt eine im Wesentlichen konstante Querschnittsfläche hat, und/oder der zweite innere Querschnitt eine im Wesentlichen konstante Querschnittsfläche hat.
  5. Stanzenabstreifvorrichtung (10) nach einem der Ansprüche 1 bis 4, wobei die innere Hülse (13) einen ersten Bereich und einen zweiten Bereich aufweiset, wobei der erste und der zweite Bereich axial voneinander beabstandet sind, wobei der erste Bereich eine Grenzfläche des Führungsbereichs (12a) der Druckkammer (12a, 12b) bildet, wobei der zweite Bereich eine Grenzfläche des Kammerbereichs (12b) der Druckkammer (12a, 12b) bildet, wobei mindestens ein Bereich des ersten und des zweiten Bereichs der inneren Hülse verschiedene Querschnittsflächen haben.
  6. Stanzenabstreifvorrichtung (10) nach Anspruch 5, wobei die Querschnittsfläche des ersten Bereichs der inneren Hülse (13) im Wesentlichen konstant ist.
  7. Stanzenabstreifvorrichtung (10) nach Anspruch 5 oder 6, wobei mindestens ein Bereich der Querschnittsfläche des zweiten Bereichs größer ist als die Querschnittsfläche des ersten Bereichs.
  8. Stanzenabstreifvorrichtung (10) nach einem der Ansprüche 1 bis 7, wobei die innere Hülse (13) bezogen auf die Stanze 1 fixiert ist und/oder wobei die äußere Hülse (14) bezogen auf die Stanze (1) fixiert ist.
  9. Stanzenabstreifvorrichtung (10) nach einem der Ansprüche 1 bis 8, wobei der verlagerbare Bereich (11b) des Stanzenabstreifvorrichtungskolbens (11) bezogen auf die innere Hülse (13) und/oder bezogen auf die äußere Hülse (14) abgedichtet ist.
  10. Stanzenabstreifvorrichtung (10) nach einem der Ansprüche 1 bis 9, wobei der Stanzenabstreifvorrichtungskolben zumindest teilweise eine rotationshemmende Anordnung aufweist, um den Stanzenabstreifvorrichtungskolben (11) zu hemmen oder daran zu hindern, relativ zu der inneren Hülse (13) und/oder der äußeren Hülse (14) zu rotieren.
  11. Stanzenabstreifvorrichtung (10) nach einem der Ansprüche 1 bis 10, aufweisend eine Druck angebende Anordnung (20), um einen Druck in der Druckkammer (12a, 12b) anzugeben, wobei die Druck angebende Anordnung 20 dazu ausgelegt ist, anzugeben, dass ein Druck in der Druckkammer (12a, 12b) einen vorbestimmten Wert übersteigt und/oder unter einen vorbestimmen Wert fällt.
  12. Stanzenabstreifvorrichtung (10) nach Anspruch 11, wobei die Druck angebende Anordnung (20) integral mit der Stanzenabstreifvorrichtung (10) ausgebildet ist.
  13. Stanzenabstreifvorrichtung (10) nach Anspruch 11 oder 12, wobei die Druck angebende Anordnung (20) einen vorgespannten Teil (22) aufweist, der zumindest teilweise von außerhalb der Stanzenabstreifvorrichtung (10) sichtbar ist.
  14. Stanzenabstreifvorrichtung (10) nach einem der Ansprüche 1 bis 13, wobei die Stanzenabstreifvorrichtung (10) zumindest teilweise durch eine Stanzenaufnahme (2) mit einem Presswerkzeug (3a, 3b) verbunden ist.
  15. Stanzenabstreifvorrichtung (10) nach Anspruch 14, wobei die Stanzenaufnahme (2) zumindest teilweise an einem Hubteil des Presswerkzeuges (3a, 3b) befestigt ist.
  16. Stanzwerkzeug aufweisend die Stanzenabstreifvorrichtung (10) nach einem der Ansprüche 1 bis 15 und aufweisend eine zweite Stanzenabstreifvorrichtung, verbunden mit dem Presswerkzeug (3a, 3b), und wobei Druckkammern der zwei Stanzenabstreifvorrichtungen in Fluidverbindung miteinander sind.
  17. Stanzwerkzeug aufweisend die Stanzenabstreifvorrichtung (10) nach Anspruch 16, wobei der Druck in den Druckkammer der zwei Stanzenabstreifvorrichtungen im Wesentlichen gleich ist.
EP20070819573 2006-11-06 2007-11-05 Abstreifvorrichtung für stanze Active EP2094413B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US85683706P 2006-11-06 2006-11-06
SE0602363A SE530555C2 (sv) 2006-11-06 2006-11-06 Stansavstrykare och pressverktyg
PCT/EP2007/009550 WO2008055631A1 (en) 2006-11-06 2007-11-05 Punch stripper

Publications (2)

Publication Number Publication Date
EP2094413A1 EP2094413A1 (de) 2009-09-02
EP2094413B1 true EP2094413B1 (de) 2010-07-21

Family

ID=38926369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070819573 Active EP2094413B1 (de) 2006-11-06 2007-11-05 Abstreifvorrichtung für stanze

Country Status (6)

Country Link
US (1) US20080105095A1 (de)
EP (1) EP2094413B1 (de)
JP (2) JP5384356B2 (de)
AT (1) ATE474678T1 (de)
DE (1) DE602007007982D1 (de)
WO (1) WO2008055631A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20070377A1 (it) * 2007-11-13 2009-05-14 Special Springs Srl Dispositivo punzonatore con premilamiera
IT1391008B1 (it) * 2008-07-04 2011-10-27 Bordignon "dispositivo estrattore perfezionato per punzone"
IT1399541B1 (it) * 2010-04-09 2013-04-19 Scattolon Stampo perfezionato per estrattore di punzoni
US9321095B2 (en) * 2010-06-30 2016-04-26 General Electric Company Apparatuses and methods for cutting porous substrates
CN103480723A (zh) * 2013-09-30 2014-01-01 大连益联金属成型有限公司 一种接线盒侧表面冲孔模具
US8789449B1 (en) * 2013-11-07 2014-07-29 Hirofumi Saito Piercing apparatus with scrap removing capability
US20160207214A1 (en) * 2015-01-19 2016-07-21 Dayton Lamina Corporation Stripping devices and punch assemblies
US20160250770A1 (en) * 2015-02-27 2016-09-01 Special Springs S.R.L. Gas-actuated hold-down for punching devices and punching device with such hold-down
CN105170780A (zh) * 2015-09-11 2015-12-23 河南航天精工制造有限公司 一种冲孔模具
CN105396975A (zh) * 2015-12-14 2016-03-16 苏州源硕精密模具有限公司 一种用于半卷圆弯曲零件的自动卸料机构
IT201700021199A1 (it) * 2017-02-24 2018-08-24 Armenio Scattolon Dispositivo perfezionato per stampaggio
CN107282784B (zh) * 2017-07-05 2019-01-29 江苏华兑金属科技有限公司 一种冲头衬套
DE202018101030U1 (de) 2018-02-26 2018-05-02 Armenio Scattolon Verbesserte Stanzvorrichtung
CN112238175A (zh) * 2020-10-12 2021-01-19 湖南中科光电有限公司 一种能够快速顶出成型产品的钣金模具

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US2579940A (en) * 1946-08-27 1951-12-25 Continental Can Co Pneumatic stripper
US2863508A (en) * 1955-03-28 1958-12-09 Wales Strippit Corp Balanced-force liquid spring
US2983176A (en) * 1956-08-21 1961-05-09 Tayco Dev Stripper construction for a perforator
US4316399A (en) * 1980-04-04 1982-02-23 Wallis Bernard J Combined punch retainer and fluid actuated stripper
US4292869A (en) * 1980-04-18 1981-10-06 Wallis Bernard J Unitary punch and die assembly
EP0243407B1 (de) * 1985-10-18 1991-07-31 Universal Engineering Development Co. Pty. Ltd. Verbesserung an schneidepressen
US4993295A (en) * 1988-12-08 1991-02-19 Utica Enterprises, Inc. Punch stripper
JP2610768B2 (ja) * 1993-03-31 1997-05-14 株式会社アマダメトレックス パンチング金型
DE19608868C1 (de) * 1996-03-07 1997-08-28 Festo Kg Manometereinrichtung
US6516696B2 (en) * 1998-02-03 2003-02-11 Diebolt International, Inc. Sleeve-type gas spring
US6182545B1 (en) * 1999-07-12 2001-02-06 Francis Richard Janek, Jr. Wedge-lockable removable punch and die bushing in retainer
JP2001038430A (ja) * 1999-07-29 2001-02-13 Pascal Kk パンチプレス用金型
US7698979B2 (en) * 2004-09-22 2010-04-20 Amada Tool America, Inc. Biasing assembly for a punching device

Also Published As

Publication number Publication date
ATE474678T1 (de) 2010-08-15
EP2094413A1 (de) 2009-09-02
JP5384356B2 (ja) 2014-01-08
US20080105095A1 (en) 2008-05-08
WO2008055631A1 (en) 2008-05-15
JP2010508152A (ja) 2010-03-18
JP2013176806A (ja) 2013-09-09
DE602007007982D1 (de) 2010-09-02
JP5792222B2 (ja) 2015-10-07

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