EP3117988B1 - Press with variable mass balancing and method of adjusting this balancing mass - Google Patents

Press with variable mass balancing and method of adjusting this balancing mass Download PDF

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Publication number
EP3117988B1
EP3117988B1 EP16176393.3A EP16176393A EP3117988B1 EP 3117988 B1 EP3117988 B1 EP 3117988B1 EP 16176393 A EP16176393 A EP 16176393A EP 3117988 B1 EP3117988 B1 EP 3117988B1
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EP
European Patent Office
Prior art keywords
mass
tank
press
counterbalance
ram
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EP16176393.3A
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German (de)
French (fr)
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EP3117988A1 (en
Inventor
Paolo Matassoni
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Andritz Technology and Asset Management GmbH
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Andritz Technology and Asset Management GmbH
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Publication of EP3117988A1 publication Critical patent/EP3117988A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0064—Counterbalancing means for movable press elements

Definitions

  • the subject of this invention is a press or a stamping machine with a drive via which a ram is driven in an oscillating manner.
  • an oscillating mass balance is provided, which is also driven by the drive in an oscillating manner in the opposite direction to the ram.
  • the mass balance has a tank which can be filled with a substance in order to adjust the mass of the mass balance.
  • the subject matter of this invention is also a method for adjusting the mass of the mass balance, which is carried out with the device according to the invention.
  • the JP S6138800 A discloses a press with a balancer that includes a tank. To adjust the mass of the mass balance, this tank can be filled with a liquid.
  • a movable plate is arranged in the tank, which limits the liquid surface and thus stabilizes it and prevents foam formation.
  • the structure of such a tank is complicated, and reliable sealing and positioning of the sliding plate is difficult to achieve at high stroke rates.
  • the JP 2008 200742 A discloses a press according to the preamble of claim 1 with a mass balance with one or two tanks which are filled with a liquid. So that the liquid in the tank cannot slosh around uncontrollably, the liquid is enclosed and stabilized by two laterally arranged sliding plates.
  • the invention is therefore based on the object of providing a press or an automatic punching machine in which a tool change can be carried out quickly and easily and in which the mass balance has a robust and simple structure.
  • baffles partition walls
  • the substance for example the oil
  • the mass of the mass balance can thus be adjusted very easily by filling or emptying the individual areas of the tank. If there are several tanks, for example two tanks, the mass can be easily adjusted by filling or emptying these individual tanks. Complete or almost complete filling of these individual areas or individual tanks reliably prevents sloshing movements of the liquid and foam formation.
  • the volumes of the individual areas or partial tanks are preferably dimensioned in such a way that the change in mass made possible by this corresponds to the change in mass caused by the tool change when completely filled.
  • the material used can be water or, preferably, oil, which is required in large quantities for the press operation anyway.
  • a solid such as lead or steel balls or sand can also be used to fill the tank.
  • the adaptation of the mass of the mass balance is preferably carried out during the tool change, ideally automatically.
  • a displacement body for example a plastic bladder, can also be provided in each of the tanks or the subregions, which when the tank is filled with the substance loses volume and limits the possibility of movement of the substance in the tank.
  • the tank is preferably connected to a stationary storage container via a flexible hose and a pump. Due to the connection via the flexible hose, the tank can move easily with the mass balance without having to disconnect the connection to the storage container.
  • the invention also comprises a method for adapting the mass of the mass balance in a press or a punching machine according to one of claims 1 or 2.
  • the mass of the mass balance is adjusted during a tool change by changing the amount of substance in the mass balance.
  • the sub-areas or tanks can each be equipped with overflow valves. For a mass adjustment of the mass balance, corresponding sub-areas or tanks are then filled until the substance escapes from the overflow of the respective sub-area / tank.
  • By completely filling individual sub-areas / tanks only a discrete mass setting is possible, but the measurement of the amount of substance becomes less important, if not even superfluous, and movement of the substance in the tank is prevented.
  • Figure 1 shows an automatic punching machine 1 with a drive 7 which drives an eccentric shaft 4 via a clutch / brake combination 6 and a flywheel 5.
  • the eccentric shaft 4 drives the plunger 2 in an oscillating manner via the connecting rod 3.
  • a punching tool 15 is attached to the lower end of the ram.
  • the eccentric shaft 4 here also drives the mass balancer 9 in an oscillating manner via a further connecting rod 8, specifically in such a way that the mass balancer 9 moves in the opposite direction to the plunger 2.
  • a tank 10 is attached to the mass balance 9 and can be filled with oil here via a flexible hose 16 with the aid of a pump 12. The oil is taken from a storage container 13.
  • the tank 10 is part of the mass balance 9 and is attached to the rest of the mass balance 9 via straps 11. As an alternative, the tank 10 can also be connected, for example screwed, to the rest of the mass balance 9 via rubber pads for vibration damping.
  • the tank 10 according to Fig. 1 consists of several sub-areas, whereby the section here goes through exactly one sub-area. In the sub-area there are baffles 14, through which the movement of the liquid is calmed.
  • the mass of the mass balance 9 is adjusted at the same time by changing the amount of oil in the tank 10.
  • the embodiment shown in the drawing merely represents a preferred embodiment of the invention.
  • the invention also includes other embodiments in which the tank 10 is filled with a solid. The solid can then be blown into the tank 10 with the aid of compressed air or sucked off for emptying.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Description

Den Gegenstand dieser Erfindung bildet eine Presse oder ein Stanzautomat mit einem Antrieb über den ein Stößel oszillierend angetrieben wird. Zum Ausgleich von Massenkräften ist ein oszillierender Massenausgleich vorgesehen, der ebenfalls über den Antrieb oszillierend in entgegengesetzter Richtung zum Stößel angetrieben wird. Der Massenausgleich weist einen Tank auf, der zur Anpassung der Masse des Massenausgleichs mit einem Stoff befüllbar ist.The subject of this invention is a press or a stamping machine with a drive via which a ram is driven in an oscillating manner. To compensate for inertial forces, an oscillating mass balance is provided, which is also driven by the drive in an oscillating manner in the opposite direction to the ram. The mass balance has a tank which can be filled with a substance in order to adjust the mass of the mass balance.

Den Gegenstand dieser Erfindung bildet auch ein Verfahren zum Anpassen der Masse des Massenausgleichs, das mit der erfindungsgemäßen Vorrichtung durchgeführt wird.The subject matter of this invention is also a method for adjusting the mass of the mass balance, which is carried out with the device according to the invention.

Insbesondere bei schnelllaufenden Stanzautomaten ist es üblich, dass zur Verminderung von Vertikalkräften ein oszillierender Massenausgleich vorgesehen ist, der als Gegengewicht das Gewicht des Stößels und des Werkzeuges ausgleicht.In the case of high-speed automatic punching machines in particular, it is common for an oscillating mass balance to be provided in order to reduce vertical forces, which counterbalances the weight of the ram and the tool.

Wenn bei derartigen Maschinen das Werkzeugoberteil, welches am Stößel befestigt ist, gewechselt wird, beispielsweise beim Wechsel auf ein anderes herzustellendes Produkt, ändert sich häufig auch das auszugleichende oszillierende Gesamtgewicht, da unterschiedliche Werkzeugoberteile in der Regel auch unterschiedliche Massen besitzen.
Die Anpassung der Masse des Massenausgleichs erfolgt gegenwärtig während des Werkzeugwechsels durch das Hinzufügen oder das Entfernen von Metallgewichten, die am oszillierenden Massenausgleich befestigt sind. Eine derartige Massenanpassung ist zeitraubend und aufwändig, insbesondere wenn das Werkzeugoberteil häufig gewechselt wird.
Die JP S6138800 A offenbart eine Presse mit einem Massenausgleich, der einen Tank aufweist. Zum Anpassen der Masse des Massenausgleichs kann dieser Tank mit einer Flüssigkeit befüllt werden. Damit im teilweise befüllten Tank die Flüssigkeit nicht unkontrolliert umherschwappen kann, ist im Tank eine verschiebbare Platte angeordnet, die die Flüssigkeitsoberfläche begrenzt und so stabilisiert und eine Schaumbildung verhindert. Der Aufbau eines derartigen Tanks ist kompliziert und bei hohen Hubzahlen ist eine zuverlässige Abdichtung und Positionierung der verschiebbaren Platte schwer zu erreichen. Außerdem sind im Tank gemäß der JP S6138800 A Sensoren angeordnet, die bei hohen Hubzahlen erheblichen Belastungen ausgesetzt sind. Die JP 2008 200742 A offenbart eine Presse gemäss dem Oberbegriff des Anspruchs 1 mit einem Massenausgleich mit einem oder zwei Tanks, die mit einer Flüssigkeit befüllt werden. Damit die Flüssigkeit im Tank nicht unkontrolliert umherschwappen kann, wird die Flüssigkeit durch zwei seitlich angeordnete verschiebbare Platten eingeschlossen und stabilisiert.When the upper tool part, which is attached to the ram, is changed in such machines, for example when changing to a different product to be manufactured, the oscillating total weight to be compensated often also changes, since different upper tool parts usually also have different masses.
Adjusting the mass of the mass balancer is currently done during tool change by adding or removing metal weights attached to the oscillating mass balancer. Such a mass adjustment is time-consuming and complex, especially if the upper part of the tool is changed frequently.
The JP S6138800 A discloses a press with a balancer that includes a tank. To adjust the mass of the mass balance, this tank can be filled with a liquid. So that the liquid cannot spill around in an uncontrolled manner in the partially filled tank, a movable plate is arranged in the tank, which limits the liquid surface and thus stabilizes it and prevents foam formation. The structure of such a tank is complicated, and reliable sealing and positioning of the sliding plate is difficult to achieve at high stroke rates. In addition, according to the JP S6138800 A Arranged sensors that are exposed to significant loads at high strokes. The JP 2008 200742 A discloses a press according to the preamble of claim 1 with a mass balance with one or two tanks which are filled with a liquid. So that the liquid in the tank cannot slosh around uncontrollably, the liquid is enclosed and stabilized by two laterally arranged sliding plates.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Presse oder einen Stanzautomaten bereitzustellen, bei denen ein Werkzeugwechsel schnell und einfach durchgeführt werden kann und bei denen der Massenausgleich einen robusten und einfachen Aufbau aufweist.The invention is therefore based on the object of providing a press or an automatic punching machine in which a tool change can be carried out quickly and easily and in which the mass balance has a robust and simple structure.

Gelöst wird diese Aufgabe durch eine Presse oder einen Stanzautomat gemäss Anspruch 1 und ein Verfahren gemäss Anspruch 3. J ZThis object is achieved by a press or an automatic punching machine according to claim 1 and a method according to claim 3. J Z

Erfindungsgemäß sind in den Teilbereichen oder Einzeltanks Schwallbleche (Trennwände) angeordnet, durch die die Bewegung des Stoffs, beispielsweise des Öls, im Tank weiter reduziert wird.According to the invention, baffles (partition walls) are arranged in the subregions or individual tanks, through which the movement of the substance, for example the oil, in the tank is further reduced.

Die Masse des Massenausgleichs kann somit durch die Befüllung bzw. durch die Entleerung der einzelnen Bereiche des Tanks sehr einfach angepasst werden. Wenn mehrere Tanks vorhanden sind, beispielsweise zwei Tanks, kann die Masse durch die Befüllung bzw. durch die Entleerung dieser Einzeltanks einfach angepasst werden.
Durch eine vollständige oder annähernd vollständige Befüllung dieser Einzelbereiche bzw. Einzeltanks werden Schwapp-Bewegungen der Flüssigkeit und eine Schaumbildung zuverlässig verhindert.
Die Volumina der Einzelbereiche oder Teiltanks werden vorzugsweise so bemessen, dass die dadurch ermöglichte Massenänderung bei vollständiger Füllung der durch den Werkzeugwechsel bedingten Massenänderung entspricht.The mass of the mass balance can thus be adjusted very easily by filling or emptying the individual areas of the tank. If there are several tanks, for example two tanks, the mass can be easily adjusted by filling or emptying these individual tanks.
Complete or almost complete filling of these individual areas or individual tanks reliably prevents sloshing movements of the liquid and foam formation.
The volumes of the individual areas or partial tanks are preferably dimensioned in such a way that the change in mass made possible by this corresponds to the change in mass caused by the tool change when completely filled.

Als Stoff kann Wasser oder vorzugsweise Öl verwendet werden, das ohnehin in großer Menge für den Pressenbetrieb benötigt wird. Es kann aber auch ein Feststoff, beispielsweise Blei- bzw. Stahlkugeln oder Sand für die Befüllung des Tanks verwendet werden.The material used can be water or, preferably, oil, which is required in large quantities for the press operation anyway. However, a solid such as lead or steel balls or sand can also be used to fill the tank.

Die Anpassung der Masse des Massenausgleichs erfolgt vorzugsweise während des Werkzeugwechsels, idealerweise automatisch.The adaptation of the mass of the mass balance is preferably carried out during the tool change, ideally automatically.

In den Tanks oder den Teilbereichen kann auch jeweils ein Verdrängungskörper, beispielsweise eine Kunststoffblase, vorgesehen sein, der bei einer Befüllung des Tanks mit dem Stoff an Volumen verliert und die Bewegungsmöglichkeit des Stoffs im Tank eingrenzt.
Der Tank ist vorzugsweise über einen flexiblen Schlauch und eine Pumpe mit einem feststehenden Vorratsbehälter verbunden. Durch die Verbindung über den flexiblen Schlauch kann sich der Tank problemlos mit dem Massenausgleich bewegen, ohne dass dafür die Verbindung zum Vorratsbehälter gelöst werden muss.A displacement body, for example a plastic bladder, can also be provided in each of the tanks or the subregions, which when the tank is filled with the substance loses volume and limits the possibility of movement of the substance in the tank.
The tank is preferably connected to a stationary storage container via a flexible hose and a pump. Due to the connection via the flexible hose, the tank can move easily with the mass balance without having to disconnect the connection to the storage container.

Die Erfindung umfasst auch ein Verfahren zum Anpassen der Masse des Massenausgleichs in einer Presse oder eines Stanzautomaten gemäß einem der Ansprüche 1 oder 2. Die Masse des Massenausgleichs wird während eines Werkzeugwechsels durch Änderung der Stoffmenge im Massenausgleich angepasst.The invention also comprises a method for adapting the mass of the mass balance in a press or a punching machine according to one of claims 1 or 2. The mass of the mass balance is adjusted during a tool change by changing the amount of substance in the mass balance.

Dabei ist es günstig, wenn die in die Teilbereiche bzw. in die Tanks gefüllte und die daraus entnommene Stoffmenge gemessen wird, sodass dadurch die aktuelle Masse des Massenausgleichs ermittelt werden kann.It is advantageous here if the amount of substance filled into the partial areas or into the tanks and the amount of substance withdrawn therefrom is measured so that the current mass of the mass balance can thereby be determined.

Die Teilbereiche bzw. Tanks können jeweils mit Überlaufventilen ausgestattet sein. Für eine Massenanpassung des Massenausgleichs werden dann entsprechende Teilbereiche oder Tanks solange befüllt, bis der Stoff aus dem Überlauf des jeweiligen Teilbereichs / Tanks austritt.
Durch das vollständige Befüllen einzelner Teilbereiche/Tanks wird zwar nur noch eine diskrete Masseneinstellung möglich, dafür wird aber die Messung der Stoffmenge weniger wichtig, wenn nicht sogar überflüssig, und ein Bewegen des Stoffs im Tank verhindert.The sub-areas or tanks can each be equipped with overflow valves. For a mass adjustment of the mass balance, corresponding sub-areas or tanks are then filled until the substance escapes from the overflow of the respective sub-area / tank.
By completely filling individual sub-areas / tanks, only a discrete mass setting is possible, but the measurement of the amount of substance becomes less important, if not even superfluous, and movement of the substance in the tank is prevented.

Es ist auch denkbar, dass an bestehenden Maschinen nachträglich ein Tank am oszillierenden Massenausgleich befestigt wird, sodass auch bei diesen Maschinen die einfache Massenanpassung bei einem Werkzeugwechsel möglich wird.It is also conceivable that a tank is subsequently attached to the oscillating mass balancer on existing machines, so that even with these machines the simple mass adjustment is possible when changing tools.

Im Folgenden wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung beschrieben.An exemplary embodiment of the invention is described below with reference to a drawing.

Figur 1 zeigt einen Stanzautomaten 1 mit einem Antrieb 7, der über eine Kupplungs-Bremskombination 6 und eine Schwungmasse 5 eine Exzenterwelle 4 antreibt. Die Exzenterwelle 4 treibt über die Pleuel 3 den Stößel 2 oszillierend an. Am unteren Stößelende ist ein Stanzwerkzeug 15 befestigt.
Die Exzenterwelle 4 treibt hier auch über ein weiteres Pleuel 8 den Massenausgleich 9 oszillierend an, und zwar so, dass sich der Massenausgleich 9 in entgegengesetzter Richtung zum Stößel 2 bewegt.
Am Massenausgleich 9 ist ein Tank 10 befestigt, der hier über einen flexiblen Schlauch 16 mit Hilfe einer Pumpe 12 mit Öl befüllt werden kann. Das Öl wird aus einem Vorratsbehälter 13 entnommen. Figure 1 shows an automatic punching machine 1 with a drive 7 which drives an eccentric shaft 4 via a clutch / brake combination 6 and a flywheel 5. The eccentric shaft 4 drives the plunger 2 in an oscillating manner via the connecting rod 3. A punching tool 15 is attached to the lower end of the ram.
The eccentric shaft 4 here also drives the mass balancer 9 in an oscillating manner via a further connecting rod 8, specifically in such a way that the mass balancer 9 moves in the opposite direction to the plunger 2.
A tank 10 is attached to the mass balance 9 and can be filled with oil here via a flexible hose 16 with the aid of a pump 12. The oil is taken from a storage container 13.

Der Tank 10 ist Bestandteil des Massenausgleichs 9 und über Spannbänder 11 am restlichen Massenausgleich 9 befestigt. Alternativ kann der Tank 10 auch über Gummiauflagen zur Schwingungsdämpfung mit dem restlichen Massenausgleich 9 verbunden, z.B. verschraubt, sein. Der Tank 10 gemäß Fig. 1 besteht aus mehreren Teilbereichen, wobei hier der Schnitt genau durch einen Teilbereich geht. Im Teilbereich befinden sich Schwallbleche 14, durch die die Flüssigkeitsbewegung beruhigt wird.The tank 10 is part of the mass balance 9 and is attached to the rest of the mass balance 9 via straps 11. As an alternative, the tank 10 can also be connected, for example screwed, to the rest of the mass balance 9 via rubber pads for vibration damping. The tank 10 according to Fig. 1 consists of several sub-areas, whereby the section here goes through exactly one sub-area. In the sub-area there are baffles 14, through which the movement of the liquid is calmed.

Wenn nun das Stanzwerkzeug 15 gewechselt wird, beispielsweise zur Bearbeitung eines anderen Produktes, dann wird gleichzeitig die Masse des Massenausgleichs 9 durch die Änderung der Ölmenge im Tank 10 angepasst.If the punching tool 15 is now changed, for example to process a different product, the mass of the mass balance 9 is adjusted at the same time by changing the amount of oil in the tank 10.

Die in der Zeichnung dargestellte Ausführungsform stellt lediglich eine bevorzugte Ausführung der Erfindung dar. Die Erfindung umfasst auch andere Ausführungsformen, bei denen der Tank 10 mit einem Feststoff befüllt wird. Der Feststoff kann dann mit Hilfe von Druckluft in den Tank 10 geblasen werden bzw. für eine Entleerung abgesaugt werden.The embodiment shown in the drawing merely represents a preferred embodiment of the invention. The invention also includes other embodiments in which the tank 10 is filled with a solid. The solid can then be blown into the tank 10 with the aid of compressed air or sucked off for emptying.

Claims (5)

  1. Press or punching machine (1) with a drive (7)that can drive a ram (2) with an oscillating movement and with an oscillating counterbalance (9) to compensate for mass forces, which can also be driven with an oscillating movement by the drive (7) in the opposite direction to the ram (2), where the oscillating counterbalance (9) has a tank (10) that can be filled with a material, where the tank (10) is divided into individual sectors separate from one another or where several tanks are available, characterized in that baffle plates (14) are disposed in the separate sectors or in the several tanks (10).
  2. Press or punching machine according to claim 1, characterized in that the tank (10) is connected to a storage bin (13) via a flexible hose (16) and a pump (12).
  3. Method for readjusting the mass of the counterbalance (9) in a press or in a punching machine (1) according to one of claims 1 or 2, where the mass of the counterbalance (9) is readjusted by changing the amount of material in the tank (10) of the counterbalance (9) if there is a change in the mass of the ram (2) due to a change of die at the ram (2), characterized in that the mass is readjusted during changing of the die.
  4. Method according to claim 3, characterized in that the mass is readjusted automatically.
  5. Method according to claim 3 or 4, characterized in that the amount of material filled into the tank (10) and the amount of material removed from the tank (10) are measured in such a way that the current mass of the counterbalance can be determined.
EP16176393.3A 2015-07-06 2016-06-27 Press with variable mass balancing and method of adjusting this balancing mass Active EP3117988B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50584/2015A AT517406B1 (en) 2015-07-06 2015-07-06 PRESS WITH VARIABLE BALANCING

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EP3117988A1 EP3117988A1 (en) 2017-01-18
EP3117988B1 true EP3117988B1 (en) 2020-08-19

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AT (1) AT517406B1 (en)
ES (1) ES2822430T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111054803A (en) * 2019-12-09 2020-04-24 衢州德迈柯精密机械有限公司 Main spindle box of punching machine
CN111531936B (en) * 2020-04-26 2021-10-26 淮北特致信息科技有限公司 Rolling hammering device for towel gourd

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Publication number Priority date Publication date Assignee Title
JPS6138800A (en) * 1984-07-31 1986-02-24 Fukui Kikai Kk Variable balancing device corresponding to upper press die
DE4201095A1 (en) * 1992-01-17 1993-07-22 Raster Maschinen Gmbh SYNCHRONOUSLY ADJUSTABLE DYNAMIC MASS COMPENSATION ON EXCENTRIC PRESSES OR PUNCHES WITH AUTOMATIC LIFT ADJUSTMENT
EP1177885A1 (en) * 2000-08-01 2002-02-06 Haulick + Roos GmbH Automatic pressing or punching machine
ATE418444T1 (en) * 2000-08-01 2009-01-15 Haulick & Roos Gmbh PRESSING OR PUNCHING AUTOMATIC
JP2003080398A (en) * 2001-09-11 2003-03-18 Yamada Dobby Co Ltd Press
JP2008200742A (en) * 2007-02-22 2008-09-04 Yamada Dobby Co Ltd Variable weight type dynamic balancer for press

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AT517406A1 (en) 2017-01-15
ES2822430T3 (en) 2021-05-04
EP3117988A1 (en) 2017-01-18
AT517406B1 (en) 2019-12-15

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