EP2149450A2 - Powder press - Google Patents

Powder press Download PDF

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Publication number
EP2149450A2
EP2149450A2 EP09007922A EP09007922A EP2149450A2 EP 2149450 A2 EP2149450 A2 EP 2149450A2 EP 09007922 A EP09007922 A EP 09007922A EP 09007922 A EP09007922 A EP 09007922A EP 2149450 A2 EP2149450 A2 EP 2149450A2
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EP
European Patent Office
Prior art keywords
die
press
force
stamp
frame
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.)
Granted
Application number
EP09007922A
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German (de)
French (fr)
Other versions
EP2149450B1 (en
EP2149450A3 (en
Inventor
Udo Baltruschat
Stephan Mallon
Harald Römer
Jan Naeve
Ingo Schmidt
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Fette GmbH
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Fette GmbH
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Publication date
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Publication of EP2149450A2 publication Critical patent/EP2149450A2/en
Publication of EP2149450A3 publication Critical patent/EP2149450A3/en
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Publication of EP2149450B1 publication Critical patent/EP2149450B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides

Definitions

  • the invention relates to a powder press according to claim 1.
  • Powder presses are u.a. for making green compacts, pressed parts, used before a sintering process.
  • the typical powder press includes upper and lower punches which cooperate with a die in a die table to compress the powder material filled into the die.
  • Upper and lower punches are driven by a suitable drive, for example a hydraulic cylinder.
  • the drives are usually located at transversely extending portions of a press frame, with a clutch usually a punch plate is interposed, to which a clamping system for upper and lower punch is attached.
  • the stamp plate is connected to a carriage or part of a carriage, which is guided vertically in the frame (adapterless pressing).
  • the upper and lower punch plate is guided by guide elements which are connected to the die table.
  • the die table is in turn connected to the transverse section of a press frame. The forces occurring during the pressing of the powder are transmitted by the pressing tools on the clamping systems in the tool guide system.
  • the invention has for its object to procure a powder press, in which also lateral forces can be measured.
  • At least one force measuring device is arranged between a stamp plate and the associated clamping system.
  • the machine control When entering a limit value for this lateral force, the machine control automatically terminates the press cycle when it is reached (transverse press force shutdown).
  • the limit value can be determined by tests or calculated in advance.
  • the maximum allowable limit can be approximately determined, in which there is a touch of the press tool components.
  • the pressing tool can be protected from premature wear or even destruction.
  • a force-measuring device is arranged between the die or the matrix clamping system and the die table.
  • the invention is applicable to both an adapterless and adapter-affected powder press.
  • a guide of the stamp plates on guide carriage is provided directly on the press frame, while in the latter case, the tool guide is decoupled from the press frame.
  • the invention is equally applicable to a press operating according to the ejection method and a press operating according to the stripping method.
  • the single FIGURE shows a working according to the ejection process powder press according to the invention.
  • the powder press shown in the drawing comprises a frame 10 with vertical columns 12 and an upper transverse frame portion 14 and a lower transverse frame portion 16).
  • an upper hydraulic cylinder 18 and a lower hydraulic cylinder 20 is mounted on the frame portions 14, 16.
  • the hydraulic cylinders 18, 20 act via an upper coupling 22 and lower coupling 23 on an upper punch plate 24 and a lower punch plate 25 on the die plates 24, 25 is a clamping system 26 for a punch 28 and a lower clamping system 30 for a Lower punch 32 attached.
  • a die table 36 with a die 38 is supported by supports 40 on the lower frame portion 16.
  • guide columns 42 are mounted, which are guided in non-designated guide bushes of the stamp plates 24, 25.
  • An upper and lower measuring system 44 is also arranged on the die table 36.
  • a force sensor 46 is arranged between the clamping system 26 and the associated stamp plate 24. Between the clamping system 30 and the lower punch plate 25, a force sensor 48 is arranged. Between the die 38 and the die table 36, a further force sensor 50 is arranged.
  • the same measuring principle can be applied to a press after the withdrawal process.
  • the lower punch is stationary or frame-fixed and the die table is driven. At the measurement of the pressing force this does not change anything.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The press has a press frame (10) including upper- and lower frame sections (14, 16), an upper linear drive (18) attached to the upper frame section and a lower linear drive (20) attached to the lower frame section. The drives are connected to upper- and lower punch plates (24, 25) or a die table. The plates have clamping systems (26, 30) for upper- or lower punches. A die clamping system is provided on the die table with a die (38). Force measuring devices i.e. force sensors (46, 48), for measuring the pressing force on the punches are arranged between the plates and the clamping systems.

Description

Die Erfindung bezieht sich auf eine Pulverpresse nach Patentanspruch 1.The invention relates to a powder press according to claim 1.

Pulverpressen werden u.a. zum Herstellen von Grünlingen, gepressten Teilen, vor einem Sinterprozess verwendet. Die typische Pulverpresse enthält einen Ober- und einen Unterstempel, die mit einer Matrize in einem Matrizentisch zusammenwirken, um das in die Matrize eingefüllte Pulvermaterial zu komprimieren. Oberund Unterstempel werden von einem geeigneten Antrieb, beispielsweise einem Hydraulikzylinder angetrieben. Die Antriebe sitzen üblicherweise an quer verlaufenden Abschnitten eines Pressenrahmens, wobei über eine Kupplung zumeist eine Stempelplatte zwischengeschaltet ist, an der ein Spannsystem für Ober- und Unterstempel angebracht ist.Powder presses are u.a. for making green compacts, pressed parts, used before a sintering process. The typical powder press includes upper and lower punches which cooperate with a die in a die table to compress the powder material filled into the die. Upper and lower punches are driven by a suitable drive, for example a hydraulic cylinder. The drives are usually located at transversely extending portions of a press frame, with a clutch usually a punch plate is interposed, to which a clamping system for upper and lower punch is attached.

Es besteht die Notwendigkeit, Ober- und Unterstempel zu führen, damit ein einwandfreies Pressergebnis erzielt wird. Ferner wird dadurch der Verschleiß an den Werkzeugen reduziert. Bei einer bekannten Ausführung ist die Stempelplatte mit einem Führungswagen verbunden oder Bestandteil eines Führungswagens, der im Rahmen vertikal geführt ist (adapterloses Pressen). Bei einer anderen Ausführung bekannter Bauweise ist die obere und die untere Stempelplatte von Führungselementen geführt, die mit dem Matrizentisch verbunden sind. Der Matrizentisch ist seinerseits mit dem quer verlaufenden Abschnitt eines Pressenrahmens verbunden. Die beim Verpressen des Pulvers auftretenden Kräfte werden durch die Presswerkzeuge über die Spannsysteme in das Werkzeugführungssystem übertragen.There is a need to run top and bottom punches for a perfect press result. Furthermore, this reduces the wear on the tools. In a known embodiment, the stamp plate is connected to a carriage or part of a carriage, which is guided vertically in the frame (adapterless pressing). In another embodiment of known construction, the upper and lower punch plate is guided by guide elements which are connected to the die table. The die table is in turn connected to the transverse section of a press frame. The forces occurring during the pressing of the powder are transmitted by the pressing tools on the clamping systems in the tool guide system.

Bei Pressen der genannten Art wird nach dem Ausstoßverfahren und nach dem Abzugsverfahren unterschieden. Im ersteren Fall ist das Matrizentischgestell rahmenfest und Ober- und Unterstempel werden vom Antrieb betätigt. Im zweiten Fall ist der Unterstempel rahmenfest und der Matrizentisch und die obere Stempelplatte werden vom Antrieb betätigt.In presses of the type mentioned, a distinction is made according to the ejection method and the withdrawal method. In the former case, the Matrizentischgestell is frame-fixed and upper and lower punches are actuated by the drive. In the second Case, the lower punch is frame-fixed and the die table and the upper punch plate are actuated by the drive.

Es ist bekannt, die Presskraft, mit der die Stempel auf das zu verpressende Pulver einwirken, zu messen. Entsprechende auf Zug und Druck ansprechende Kraftsensoren werden hierfür zwischen dem Antrieb und einer Kupplung bzw. der Stempelplatte angeordnet.It is known to measure the pressing force with which the punches act on the powder to be pressed. Corresponding to train and pressure responsive force sensors are arranged for this purpose between the drive and a clutch or the stamp plate.

Der Erfindung liegt die Aufgabe zugrunde, eine Pulverpresse zu beschaffen, bei der auch Querkräfte gemessen werden können.The invention has for its object to procure a powder press, in which also lateral forces can be measured.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Bei der erfindungsgemäßen Pulverpresse ist mindestens eine Kraftmessvorrichtung zwischen einer Stempelplatte und dem zugehörigen Spannsystem angeordnet.In the powder press according to the invention, at least one force measuring device is arranged between a stamp plate and the associated clamping system.

Bei der herkömmlichen Presskraftmessung wird zwischen Antrieb und Werkzeugebene außerhalb des erwähnten Kraftflusses gemessen. Dies bedeutet, dass im Wesentlichen nur die vertikalen Kräfte auf das zu verpressende Pulver erfasst werden, nicht jedoch die Querkräfte. Bei der Erfindung hingegen erfolgt die Kraftmessung innerhalb des Werkzeugführungssystems, so dass auch die Querkraftkomponente, falls eine vorhanden ist, ermittelt wird.In the conventional press force measurement is measured between the drive and tool level outside the mentioned power flow. This means that essentially only the vertical forces are detected on the powder to be pressed, but not the transverse forces. In contrast, in the case of the invention, the force measurement takes place within the tool guiding system, so that the transverse force component, if one is present, is also determined.

Durch die Bestimmung der Querkraft und die Zerlegung dieser Kraft in Betrag und Kraftkomponentenrichtung ist es nun möglich, die tatsächlichen Belastungen, die auf Presswerkzeug, Nullpunktspannsystem und Führungssystem einwirken, zu bestimmen.By determining the lateral force and decomposing this force in magnitude and force component direction, it is now possible to determine the actual loads acting on the press tool, zero point clamping system and guide system.

Bei Eingabe eines Grenzwertes für diese Querkraft beendet die Maschinensteuerung bei dessen Erreichung automatisch den Presszyklus (Querpresskraftabschaltung). Der Grenzwert kann durch Versuche ermittelt oder im Vorwege berechnet werden.When entering a limit value for this lateral force, the machine control automatically terminates the press cycle when it is reached (transverse press force shutdown). The limit value can be determined by tests or calculated in advance.

Alternativ kann z. B. mit Hilfe der bekannten Pressspaltweite (umlaufender Spalt zwischen gepaartem Pressstempel und zugehörender Matrize) und des bekannten Verformungsverhaltens der Werkzeugführung der maximal zulässige Grenzwert annähernd bestimmt werden, bei der es zu einer Berührung der Presswerkzeugbauteile kommt. Das Presswerkzeug kann dadurch vor vorzeitigem Verschleiß oder gar Zerstörung geschützt werden.Alternatively, z. B. with the help of the known press gap width (circumferential gap between the paired punch and associated die) and the known deformation behavior of the tool guide the maximum allowable limit can be approximately determined, in which there is a touch of the press tool components. The pressing tool can be protected from premature wear or even destruction.

Bei unsachgemäßem Einbau des Presswerkzeugs in das Werkzeugführungssystem (Stempelkippen; Stempel nicht achsfluchtend zueinander) würden beim Paaren von Stempel und Matrize/Stempel ebenfalls Querkräfte sichtbar werden, die dem Werkzeugschutz dienen können.In case of improper installation of the pressing tool in the tool guiding system (stamp tipping, punch not aligned with each other), transverse forces, which can serve for tool protection, would also be visible when mating the punch and die / punch.

In einer Ausgestaltung der Erfindung ist vorgesehen, dass zwischen der Matrize bzw. dem Matrizenspannsystem und dem Matrizentisch eine Kraftmessvorrichtung angeordnet ist.In one embodiment of the invention, it is provided that a force-measuring device is arranged between the die or the matrix clamping system and the die table.

Die Erfindung ist sowohl auf eine adapterlose als auch adapterbehaftete Pulverpresse anwendbar. Bei ersterer ist eine Führung der Stempelplatten über Führungswagen unmittelbar am Pressenrahmen vorgesehen, während im letzteren Fall die Werkzeugführung vom Pressenrahmen entkoppelt ist.The invention is applicable to both an adapterless and adapter-affected powder press. In the former, a guide of the stamp plates on guide carriage is provided directly on the press frame, while in the latter case, the tool guide is decoupled from the press frame.

Die Erfindung ist in gleicher Weise anwendbar auf eine nach dem Ausstoßverfahren arbeitende Presse und eine nach dem Abzugverfahren arbeitende Presse.The invention is equally applicable to a press operating according to the ejection method and a press operating according to the stripping method.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand einer Zeichnung näher erläutert.An embodiment of the invention will be explained in more detail with reference to a drawing.

Die einzige Figur zeigt eine nach dem Ausstoßverfahren arbeitende Pulverpresse in erfindungsgemäßer Ausführung.The single FIGURE shows a working according to the ejection process powder press according to the invention.

Die in der Zeichnung dargestellte Pulverpresse weist einen Rahmen 10 auf mit vertikalen Säulen 12 und einem oberen quer verlaufenden Rahmenabschnitt 14 und einem unteren quer verlaufenden Rahmenabschnitt 16). An den Rahmenabschnitten 14, 16 ist ein oberer Hydraulikzylinder 18 bzw. ein unterer Hydraulikzylinder 20 angebracht. Die Hydraulikzylinder 18, 20 wirken über eine obere Kupplung 22 bzw. untere Kupplung 23 auf eine obere Stempelplatte 24 bzw. eine untere Stempelplatte 25. An den Stempelplatten 24, 25 ist ein Spannsystem 26 für einen Oberstempel 28 bzw. ein unteres Spannsystem 30 für einen Unterstempel 32 angebracht. Ein Matrizentisch 36 mit einer Matrize 38 stützt sich über Stützen 40 an dem unteren Rahmenabschnitt 16 ab. An dem Matrizentisch 36 sind Führungssäulen 42 angebracht, die in nicht bezeichneten Führungsbuchsen der Stempelplatten 24, 25 geführt sind. An dem Matrizentisch 36 ist außerdem ein oberes und unteres Messsystem 44 angeordnet.The powder press shown in the drawing comprises a frame 10 with vertical columns 12 and an upper transverse frame portion 14 and a lower transverse frame portion 16). On the frame portions 14, 16, an upper hydraulic cylinder 18 and a lower hydraulic cylinder 20 is mounted. The hydraulic cylinders 18, 20 act via an upper coupling 22 and lower coupling 23 on an upper punch plate 24 and a lower punch plate 25 on the die plates 24, 25 is a clamping system 26 for a punch 28 and a lower clamping system 30 for a Lower punch 32 attached. A die table 36 with a die 38 is supported by supports 40 on the lower frame portion 16. On the die table 36 guide columns 42 are mounted, which are guided in non-designated guide bushes of the stamp plates 24, 25. An upper and lower measuring system 44 is also arranged on the die table 36.

Zwischen dem Spannsystem 26 und der zugehörigen Stempelplatte 24 ist ein Kraftsensor 46 angeordnet. Zwischen dem Spannsystem 30 und der unteren Stempelplatte 25 ist ein Kraftsensor 48 angeordnet. Zwischen der Matrize 38 und dem Matrizentisch 36 ist ein weiterer Kraftsensor 50 angeordnet.Between the clamping system 26 and the associated stamp plate 24, a force sensor 46 is arranged. Between the clamping system 30 and the lower punch plate 25, a force sensor 48 is arranged. Between the die 38 and the die table 36, a further force sensor 50 is arranged.

Nach dem Befüllen der Matrize 38 werden Ober- und Unterstempel 28, 32 in die Matrize hineinbewegt, angetrieben durch die Hydraulikzylinder 18, 20. Nach dem Herstellen des Presslings wird der Oberstempel 28 herausgezogen, und der Unterstempel 32 wirft den Pressling aus der Matrize 36 aus. Die Bewegung der Stempelplatten bzw. der Stempel ist durch die beiden Doppelpfeile angedeutet.After filling the die 38 upper and lower punches 28, 32 are moved into the die, driven by the hydraulic cylinders 18, 20. After the Making the compact, the upper punch 28 is pulled out, and the lower punch 32 ejects the compact from the die 36. The movement of the stamp plates or the stamp is indicated by the two double arrows.

Dadurch, dass die Presskraftmessung zwischen den Stempelplatten und den Werkzeugen stattfindet, ist es möglich, auch Querkräfte zu messen, die beim Pressen auftreten. Dies im Gegensatz zum Stand der Technik, bei dem nur eine Presskraftmessung in Arbeitsrichtung möglich ist.The fact that the pressing force measurement takes place between the stamp plates and the tools, it is possible to measure even lateral forces that occur during pressing. This in contrast to the prior art, in which only a press force measurement in the working direction is possible.

Es sei noch erwähnt, dass das gleiche Messprinzip auf eine Presse nach dem Abzugverfahren angewendet werden kann. Bei letzterem ist der Unterstempel stationär bzw. rahmenfest und der Matrizentisch wird angetrieben. An der Messung der Presskraft ändert dies nichts.It should be noted that the same measuring principle can be applied to a press after the withdrawal process. In the latter, the lower punch is stationary or frame-fixed and the die table is driven. At the measurement of the pressing force this does not change anything.

Claims (5)

Pulverpresse, mit einem Pressenrahmen, der einen oberen und einen unteren Rahmenabschnitt aufweist, einem am oberen Rahmenabschnitt angebrachten oberen linearen Antrieb und einen am unteren Rahmenabschnitt angebrachten unteren Linearantrieb, wobei die Antriebe mit einem Ober- bzw. einer Unterstempelplatte bzw. einem Matrizentisch verbunden sind, wobei die Stempelplatten ein Spannsystem für einen Ober- bzw. einen Unterstempel aufweisen, einem Matrizenspannsystem an einem Matrizentisch mit einer Matrize, und mindestens einer Kraftmessvorrichtung zur Messung der Presskraft an mindestens einem Stempel, dadurch gekennzeichnet, dass mindestens eine Kraftmessvorrichtung (46, 48) zwischen einer Stempelplatte (24, 25) und dazugehörigem Spannsystem (26, 30) angeordnet ist.A powder press, comprising a press frame having upper and lower frame sections, an upper linear drive mounted on the upper frame section, and a lower linear drive mounted on the lower frame section, the drives being connected to a die plate and a die table, respectively; wherein the stamp plates have a clamping system for a top or a bottom punch, a die clamping system on a die table with a die, and at least one force measuring device for measuring the pressing force on at least one stamp, characterized in that at least one force measuring device (46, 48) between a stamp plate (24, 25) and associated clamping system (26, 30) is arranged. Pulverpresse nach Anspruch 1, dadurch gekennzeichnet, dass zwischen der Matrize (38) bzw. dem Matrizenspannsystem und dem Matrizentisch (36) eine Kraftmessvorrichtung (50) angeordnet ist.Powder press according to claim 1, characterized in that a force-measuring device (50) is arranged between the die (38) or the die clamping system and the die table (36). Pulverpresse bei Anspruch 1 oder 2, gekennzeichnet durch die Anwendung auf eine Presse, bei der die Stempelplatte (24, 25) an Führungen (42) ist, die am Matrizentisch (36) angebracht sind.Powder press according to claim 1 or 2, characterized by the application to a press, wherein the stamp plate (24, 25) on guides (42) which are mounted on the die table (36). Pulverpresse nach Anspruch 1 oder 2, gekennzeichnet durch die Anwendung auf eine Presse, bei der die Stempelplatten jeweils an einem Laufwagen angebracht sind, der in Führungen des Pressenrahmens (10) vertikal geführt ist.Powder press according to claim 1 or 2, characterized by the application to a press, wherein the stamp plates are each mounted on a carriage, which is guided vertically in guides of the press frame (10). Pulverpresse nach Anspruch 1 oder 2, gekennzeichnet durch die Anwendung auf eine nach dem Abzugsverfahren arbeitende PressePowder press according to claim 1 or 2, characterized by its application to a press operating by the drawing method
EP09007922.9A 2008-07-29 2009-06-17 Powder press Not-in-force EP2149450B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008035301A DE102008035301B3 (en) 2008-07-29 2008-07-29 powder Press

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EP2149450A2 true EP2149450A2 (en) 2010-02-03
EP2149450A3 EP2149450A3 (en) 2010-12-22
EP2149450B1 EP2149450B1 (en) 2016-07-20

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EP (1) EP2149450B1 (en)
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CN102259434A (en) * 2011-05-25 2011-11-30 郭春林 Double-sided hydraulic pressure machine
DE102011116552B4 (en) * 2011-10-21 2015-08-20 Fette Compacting Gmbh Press
US9272479B2 (en) 2011-10-21 2016-03-01 Fette Compacting Gmbh Press
DE102011116548B4 (en) * 2011-10-21 2014-05-15 Fette Compacting Gmbh Press
US9289924B2 (en) 2011-10-21 2016-03-22 Fette Compacting Gmbh Press
DE102011116548A1 (en) * 2011-10-21 2013-04-25 Fette Compacting Gmbh Press
DE102011116552A1 (en) * 2011-10-21 2013-04-25 Fette Compacting Gmbh Press
DE102013113665A1 (en) * 2013-12-06 2015-06-11 Fette Compacting Gmbh Press
DE102013113665B4 (en) * 2013-12-06 2015-09-03 Fette Compacting Gmbh Press
US9314946B2 (en) 2013-12-06 2016-04-19 Fette Compacting Gmbh Press
CN104441743A (en) * 2014-10-16 2015-03-25 陈烈 Fully-automatic powder pressing device
CN104441743B (en) * 2014-10-16 2016-08-31 陈烈 A kind of automatic Powder hold down gag
DE102015117663A1 (en) * 2015-10-16 2017-04-20 Dorst Technologies Gmbh & Co. Kg CERAMIC AND / OR METAL POWDER PRESSING TOOL, PRESSE BZW. METHOD FOR SETTING A CERAMIC AND / OR METAL POWDER PRESS
CN112810222A (en) * 2020-12-28 2021-05-18 杭州波普电器有限公司 Die stamping device and using method thereof
CN112810222B (en) * 2020-12-28 2022-11-25 杭州波普电器有限公司 Die stamping device and using method thereof

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US8186988B2 (en) 2012-05-29
EP2149450B1 (en) 2016-07-20
US20100028478A1 (en) 2010-02-04
EP2149450A3 (en) 2010-12-22

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