EP1277564A2 - Method of compacting powder materials - Google Patents

Method of compacting powder materials Download PDF

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Publication number
EP1277564A2
EP1277564A2 EP02015132A EP02015132A EP1277564A2 EP 1277564 A2 EP1277564 A2 EP 1277564A2 EP 02015132 A EP02015132 A EP 02015132A EP 02015132 A EP02015132 A EP 02015132A EP 1277564 A2 EP1277564 A2 EP 1277564A2
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EP
European Patent Office
Prior art keywords
deformation
die plate
pressing
forces
punches
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Application number
EP02015132A
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German (de)
French (fr)
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EP1277564B1 (en
EP1277564A3 (en
Inventor
Jürgen Hinzpeter
Ulrich Zeuschner
Ingo Schmidt
Thomas Pannewitz
Udo Baltruschat
Thorsten Ehrich
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Fette GmbH
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Fette GmbH
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Publication of EP1277564A3 publication Critical patent/EP1277564A3/en
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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
    • B30B11/005—Control arrangements

Definitions

  • a common way to press powder material is to Form space in a so-called die plate and using a Upper and one lower stamp to produce the compact. Usually the Lower punch inserted into a predetermined position in the die hole, after which the filling with powder material takes place. Then with the help of Upper stamp of the compact shaped. With the help of such a method e.g. Pressed metal powder for the production of molded parts by the sintering process.
  • the aim is to make the compact relatively precise if possible shape in terms of its geometric dimensions and density, so that the desired dimensional accuracy is achieved later after the sintering process.
  • the invention has for its object a method for pressing To create powder material with which a compact is reproducibly manufactured can be while protecting the pressing device against unwanted Damage due to insufficient deformation of the die plate.
  • the invention is based on the fact that the bending force acting on the die plate arises from the difference between the press forces of the upper and lower punches.
  • the inventive method is a curve or a table for the dependency the deformation of the die plate from the applied pressing forces.
  • the delivery routes of the press rams is also essential to know which misalignments of the die hole change with different deformations to adjust. Therefore, in the method according to the invention during the Pressing process from time to time or continuously the pressing force to the Stamps measured to determine the respective deformation.
  • To a specific one Deformation value of the die plate includes a predetermined delivery path for the Ram. It is therefore possible using the method according to the invention during the pressing process the length of the delivery path according to the described Correct measurements. With the help of the invention it is therefore achieved that the upper punch is moved precisely to the edge of the die hole, but without touching them significantly.
  • a pressing device 10 shown in Figure 1 has a die plate 12, with a die hole 14 with which an upper punch 16 and a lower punch 18th interact.
  • the power devices that operate the punches 16, 18 are not shown. They are conventional and e.g. hydraulic acting. It is with Such pressing devices possible to position the ram in the ⁇ m range. Is between the force devices, not shown, and the punches 16, 18 one load cell 20 or 22 is arranged.
  • the die plate 12 rests complaints 24, 26
  • the actual shape space of the die bore 14 is in cross section conical or trapezoidal with two inclined surfaces 26. If a circular one Form space is present, there is naturally only a conical surface.
  • the molding space which can be seen in Figure 1 serves e.g. for the production of a compact Metal powder material for the production of an indexable insert after the sintering process, e.g. for milling or drilling tools or the like.
  • Both ram 16, 18 move into the bore 14, with the upper ram moving towards the edge 28 is and thus specifies the bearing of the top of the compact, during the Lower punch is brought up to the edge 30 in order to specify the thickness of the compact.
  • the lower punch 18 first becomes one Filling position advanced. Then it is filled with powder material. Then the upper punch 16 is actuated and moved up to the edge 28, to deform the compact by pressing. At the same time we have the lower stamp 18 driven to the edge 30.
  • the method of the pressing device is shown in the block diagram from FIG 10 clearly shown in Figure 1.
  • the function is tabulated in a computer 30 stored between the deformation force on the die plate 12 and thereby induced deformation. More specifically, is the displacement of the die hole or the edge 28 deposited relative to the deformation force.
  • the investigation this relationship can be done with the help of suitable measurements or calculations, before production starts.
  • the powder material to be pressed is known and also the density required for the compact.
  • the deformation can be in the case of the individual deformation forces, which is the difference between the pressing forces the stamp 16, 18 are formed, determine.
  • the computer If the value of the pressing forces is too low, the computer generates 30 a shutdown signal for the press device 10. This will damage avoided by stamp and die plate.

Abstract

Pressing powder material into a blank of prescribed thickness comprises measuring or calculating the deformation of the die plate for different pressing forces and tabulating the correlating value in a computer; and acquiring the deformation during pressing using the measured deformation forces on the table and correcting the adjusting path of the upper and lower stamp according to the measure of the deformation. Preferred Features: The deformation force is continuously acquired during the pressing process.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Verpressen vom Pulvermaterial nach dem Patentanspruch 1.The invention relates to a method for pressing the powder material according to claim 1.

Eine übliche Verfahrensweise, Pulvermaterial zu verpressen besteht darin, den Formraum in einer sogenannten Matrizenplatte auszubilden und mit Hilfe eines Ober- und eines Unterstempels den Preßling herzustellen. Üblicherweise wird der Unterstempel in eine vorgegebene Position in die Matrizenbohrung eingefahren, wonach die Befüllung mit Pulvermaterial erfolgt. Anschließend wird mit Hilfe des Oberstempels der Preßling geformt. Mit Hilfe eines derartigen Verfahrens wird z.B. Metallpulver für die Herstellung von Formteilen nach dem Sinterverfahren verpresst. Dabei wird angestrebt, den Preßling nach Möglichkeit schon relativ präzise im Hinblick auf seine geometrischen Abmessungen und seine Dichte zu formen, so daß später nach dem Sinterprozeß die gewünschte Maßhaltigkeit erreicht wird.A common way to press powder material is to Form space in a so-called die plate and using a Upper and one lower stamp to produce the compact. Usually the Lower punch inserted into a predetermined position in the die hole, after which the filling with powder material takes place. Then with the help of Upper stamp of the compact shaped. With the help of such a method e.g. Pressed metal powder for the production of molded parts by the sintering process. The aim is to make the compact relatively precise if possible shape in terms of its geometric dimensions and density, so that the desired dimensional accuracy is achieved later after the sintering process.

Weist der Preßling eine geometrische Form auf, bei der eine Schrägfläche an der Außenseite vorgesehen ist, wie das z.B. bei Schneidplatten von Fräs- und Bohrwerkzeugen der Fall ist, dann wird während des Preßvorgangs eine nicht unerhebliche Verformungskraft auf die Matrizenplatte ausgeübt. Die Verformungskraft führt zur Verformung der Matrizenplatte durch Biegung und Stauchung. Die dadurch hervorgerufene Biegung der Matrizenplatte kann über eine geschickte Wahl der Auflageflächen und der Matrizenplattenquerschnitte verringert, aber nicht eliminiert werden.If the compact has a geometric shape with an inclined surface on the Outside is provided, such as for cutting inserts of milling and drilling tools is the case, then becomes a not inconsiderable during the pressing process Deformation force exerted on the die plate. The deformation force leads for deforming the die plate through bending and compression. The resulting Bending the die plate can be done by a skillful choice of the contact surfaces and the die plate cross sections reduced, but not eliminated become.

Bei dem beschriebenen Preßverfahren darf die Verformung der Matrizenplatte nicht außer acht gelassen werden. Es ist erforderlich, daß der Oberstempel die Kante am Übergang der Formflächen präzise anfährt. Wird der Oberstempel nicht an diesem Punkt angehalten, kommt es zu einer Beschädigung von Stempel und Matrize. Wird der Stempel hingegen zu früh angehalten, fehlt es an der Maßhaltigkeit.In the pressing process described, the deformation of the die plate must not be disregarded. It is necessary that the upper punch the edge on Precise transition to the mold surfaces. If the upper stamp is not on this If the point is stopped, the stamp and die will be damaged. Becomes if the stamp is stopped too early, the dimensional accuracy is missing.

Es ist bekannt, durch Versuche oder rechnerisch zu ermitteln, um welchen Betrag eine Matrizenplatte bei einem bestimmten Preßprozeß verformt wird, um den Verstellweg des Oberstempels entsprechend vorzugeben. Normalerweise erfolgt dies dadurch, daß am Preßling festgestellt wird, ob der Preßstempel die vorgegebene Strecke zurückgelegt hat oder nicht. Ein derartiges Verfahren ist relativ aufwendig und schützt die Preßvorrichtung nicht vor Beschädigungen. Kommt es aufgrund unzureichender Befüllung zu relativ kleinen Preßkräften, entfällt die Verformung der Matrizenplatte oder erreicht deutlich kleinere Werte, so daß die Positionierung des Preßstempel zwangsläufig zur Folge hat, daß der Oberstempel gegen die Kante der Matrizenbohrung anfährt.It is known to determine by experiment or by calculation what amount a die plate is deformed in a certain pressing process by the adjustment path of the upper stamp accordingly. Usually this is done in that it is determined on the compact whether the press ram is the predetermined one Traveled or not. Such a method is relatively complex and does not protect the press device from damage. It comes about insufficient filling to relatively small press forces, the deformation is eliminated the die plate or reaches significantly smaller values so that the positioning of the ram inevitably has the consequence that the upper ram against the edge the die hole starts.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Verpressen von Pulvermaterial zu schaffen, mit dem ein Preßling reproduzierbar präzise hergestellt werden kann bei gleichzeitigem Schutz der Preßvorrichtung gegen ungewollte Beschädigungen aufgrund unzureichender Verformung der Matrizenplatte.The invention has for its object a method for pressing To create powder material with which a compact is reproducibly manufactured can be while protecting the pressing device against unwanted Damage due to insufficient deformation of the die plate.

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

Die Erfindung geht davon aus, daß die auf die Matrizenplatte wirkende Biegekraft sich aus der Differenz der Preßkräfte von Ober- und Unterstempel ergibt. Beim erfindungsgemäßen Verfahren wird eine Kurve oder eine Tabelle für die Abhängigkeit der Verformung der Matrizenplatte von den aufgebrachten Preßkräften. Für die Einstellung der Zustellwege der Preßstempel ist außerdem wesentlich zu wissen, welche Verlagerungen der Matrizenbohrung sich bei unterschiedlichen Verformungen einstellen. Daher wird bei dem erfindungsgemäßen Verfahren während des Preßvorgangs von Zeit zu Zeit oder auch kontinuierlich die Preßkraft an den Stempeln gemessen zur Ermittlung der jeweiligen Verformung. Zu einem bestimmten Verformungswert der Matrizenplatte gehört ein vorgegebener Zustellweg für die Preßstempel. Es ist daher möglich, mit Hilfe des erfindungsgemäßen Verfahrens während des Preßvorgangs die Länge des Zustellweges nach Maßgabe der beschriebenen Messungen zu korrigieren. Mit Hilfe der Erfindung wird daher erreicht, daß der Oberstempel präzise an die Kante der Matrizenbohrung herangefahren wird, ohne sie jedoch signifikant zu berühren.The invention is based on the fact that the bending force acting on the die plate arises from the difference between the press forces of the upper and lower punches. At the The inventive method is a curve or a table for the dependency the deformation of the die plate from the applied pressing forces. For the Setting the delivery routes of the press rams is also essential to know which misalignments of the die hole change with different deformations to adjust. Therefore, in the method according to the invention during the Pressing process from time to time or continuously the pressing force to the Stamps measured to determine the respective deformation. To a specific one Deformation value of the die plate includes a predetermined delivery path for the Ram. It is therefore possible using the method according to the invention during the pressing process the length of the delivery path according to the described Correct measurements. With the help of the invention it is therefore achieved that the upper punch is moved precisely to the edge of the die hole, but without touching them significantly.

Bei einer Verformung der Matrizenplatte kommt es naturgemäß auch zu einer Relativverlagerung von Unterstempel und Matrizenbohrung. Es ist daher erforderlich, bei der beschriebenen Korrektur des Zustellwegs des Oberstempels den Zustellwegs des Unterstempels parallel zu korrigieren.If the die plate is deformed, there is of course also a relative displacement of lower punch and die hole. It is therefore necessary to the described correction of the delivery path of the upper stamp the delivery path of the Correct lower stamp in parallel.

Mit Hilfe des erfindungsgemäßen Verfahrens kann vermieden werden, daß der Oberstempel gegen eine Kante der Matrizenbohrung anfährt, wenn es zu keiner Verformung der Matrizenplatte kommt. Da, wie erwähnt, ständig die Preßkraft gemessen wird, diese jedoch auch bestimmte Werte unterschreiten kann, kann auf diese Weise ermittelt werden, wann die gesamte Preßvorrichtung still zu setzen ist, damit eine Beschädigung von Oberstempel und Matrizenbohrung vermieden wird.With the help of the method according to the invention can be avoided that the Upper punch hits against an edge of the die hole if there is no deformation the die plate comes. Since, as mentioned, the pressing force is constantly measured is, but this can also fall below certain values, can on this Way are determined when the entire pressing device is to be shut down, so Damage to the upper punch and die hole is avoided.

Bei dem beschriebenen Preßvorgang kommt es nicht nur zu einer Verformung der Matrizenplatte, sondern auch zu einer Stauchverformung von Ober- und Unterstempel. Die Verformungswerte sind ebenso wie die Verformung der Matrizenplatte relativ klein, aber nicht vernachlässigbar. So wird z.B. bei einer Matrizenplatte eine Verformung von einigen µm pro Tonne Preßkraft erhalten. Um bei einer nicht zu vernachlässigenden Stauchung der Preßstempel ebenfalls eine Korrektur vorzunehmen, sieht eine Ausgestaltung der Erfindung vor, daß für eine Reihe von unterschiedlichen Preßkräften an den Stempeln deren Stauchverformung gemessen oder berechnet wird. Die korrelierenden Werte von Stauchverformung und Preßkräften werden tabellarisch in einem Speicher abgelegt. Die Zustellung von Ober- und Unterstempel wird dann nach Maßgabe der Stauchung korrigiert.In the pressing process described, there is not only a deformation of the Die plate, but also for upsetting the upper and lower punches. The deformation values are just like the deformation of the die plate relatively small, but not negligible. For example, for a die plate one Deformation of a few microns per ton of pressing force. In order not to one neglecting compression of the ram also to make a correction, provides an embodiment of the invention that for a number of different Pressing forces on the punches measured their compression deformation or is calculated. The correlating values of compression set and compression forces are stored in a table in a memory. The delivery of top and The lower stamp is then corrected in accordance with the compression.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt schematisch eine Preßvorrichtung nach der Erfindung.
Fig. 2
zeigt anhand eine Blockschaltbildes den Betrieb der Preßvorrichtung nach Fig. 1.
An embodiment of the invention is explained in more detail below with reference to drawings.
Fig. 1
shows schematically a pressing device according to the invention.
Fig. 2
shows the operation of the pressing device according to FIG. 1 on the basis of a block diagram.

Eine in Figur 1 dargestellte Preßvorrichtung 10 weist eine Matrizenplatte 12 auf, mit einer Matrizenbohrung 14, mit der ein Oberstempel 16 und ein Unterstempel 18 zusammenwirken. Die Kraftvorrichtungen, die die Stempel 16, 18 betätigen, sind nicht dargestellt. Sie sind herkömmlich und z.B. hydraulisch wirkend. Es ist mit derartigen Preßvorrichtungen möglich, die Preßtempel im µm-Bereich zu positionieren. Zwischen den nicht gezeigten Kraftvorrichtungen und den Stempeln 16, 18 ist jeweils eine Kraftmeßdose 20 bzw. 22 angeordnet. Die Matrizenplatte 12 ruht auf beanstandeten Auflagern 24, 26.A pressing device 10 shown in Figure 1 has a die plate 12, with a die hole 14 with which an upper punch 16 and a lower punch 18th interact. The power devices that operate the punches 16, 18 are not shown. They are conventional and e.g. hydraulic acting. It is with Such pressing devices possible to position the ram in the µm range. Is between the force devices, not shown, and the punches 16, 18 one load cell 20 or 22 is arranged. The die plate 12 rests complaints 24, 26

Wie zu erkennen, ist der eigentliche Formraum der Matrizenbohrung 14 im Querschnitt konisch bzw. trapezförmig mit zwei Schrägflächen 26. Falls ein kreisrunder Formraum vorliegt, ist naturgemäß nur eine konische Fläche vorhanden. Der Formraum, der in Figur 1 zu erkennen ist, dient z.B. zur Herstellung eines Preßlings aus Metallpulvermaterial zur Herstellung einer Wendeschneidplatte nach dem Sinterverfahren, z.B. für Fräs- oder Bohrwerkzeuge oder dergleichen. Beide Preßstempel 16, 18 fahren in die Bohrung 14 ein, wobei der obere Preßstempel an die Kante 28 heranzufahren ist und damit die Lager der Oberseite des Preßlings vorgibt, während der Unterstempel an die Kante 30 heranzufahren ist, um die Dicke des Preßlings vorzugeben. Während des Preßprozesses wird zunächst der Unterstempel 18 zu einer Befüllposition vorgefahren. Dann erfolgt eine Befüllung mit Pulvermaterial. Anschließend wird der Oberstempel 16 betätigt und bis an die Kante 28 herangefahren, um den Preßling durch Pressen zu verformen. Zugleich wir der Unterstempel 18 bis zur Kante 30 gefahren.As can be seen, the actual shape space of the die bore 14 is in cross section conical or trapezoidal with two inclined surfaces 26. If a circular one Form space is present, there is naturally only a conical surface. The molding space, which can be seen in Figure 1 serves e.g. for the production of a compact Metal powder material for the production of an indexable insert after the sintering process, e.g. for milling or drilling tools or the like. Both ram 16, 18 move into the bore 14, with the upper ram moving towards the edge 28 is and thus specifies the bearing of the top of the compact, during the Lower punch is brought up to the edge 30 in order to specify the thickness of the compact. During the pressing process, the lower punch 18 first becomes one Filling position advanced. Then it is filled with powder material. Then the upper punch 16 is actuated and moved up to the edge 28, to deform the compact by pressing. At the same time we have the lower stamp 18 driven to the edge 30.

Aufgrund der unterschiedlich zu verpressenden Querschnitte von Ober- und Unterstempel 16, 18 wird ein Differenzdruck auf die Matrizenplatte 12 aufgebracht, und die Matrizenplatte wird zwischen den Auflagern 24, 26 durchgebogen und gestaucht, wie deutlich und übertrieben in Figur 1 zu erkennen. Diese Verformung der Matrizenplatte 12 bedingt nun, daß der Oberstempel 16 weiter in der Matrizenbohrung 14 hineingefahren werden muß als bei unverformter Matrizenplatte 12, um die Kante 28 zu erreichen. Dieser Verstellweg ist abhängig von der jeweiligen Verformung der Matrizenplatte 12, die wiederum von der Differenzkraft an der Matrizenplatte abhängt.Due to the different cross-sections of the upper and lower punches 16, 18, a differential pressure is applied to the die plate 12, and the die plate is bent between the supports 24, 26 and compressed, as can be seen clearly and exaggerated in Figure 1. This deformation the die plate 12 now requires that the upper punch 16 continue in the die hole 14 must be driven in as with undeformed die plate 12 in order to reach the edge 28. This adjustment path depends on the respective deformation the die plate 12, which in turn depends on the differential force on the die plate depends.

Aus den Blockschaltbild aus Figur 2 geht die Verfahrensweise der Preßvorrichtung 10 nach Figur 1 deutlich hervor. In einem Rechner 30 ist tabellarisch die Funktion abgelegt zwischen der Verformungskraft an der Matrizenplatte 12 und der dadurch hervorgerufenen Verformung. Genauer gesagt, ist die Verlagerung der Matrizenbohrung bzw. der Kante 28 relativ zur Verformungskraft abgelegt. Die Ermittlung dieser Beziehung kann mit Hilfe geeigneter Messungen oder Berechnungen geschehen, bevor die Produktion beginnt. Das zu verpressende Pulvermaterial ist bekannt und auch die Dichte, die für den Preßling gefordert ist. Mithin läßt sich die Verformung bei den einzelnen Verformungskräften, die aus der Differenz der Preßkräfte der Stempel 16, 18 gebildet werden, ermitteln.The method of the pressing device is shown in the block diagram from FIG 10 clearly shown in Figure 1. The function is tabulated in a computer 30 stored between the deformation force on the die plate 12 and thereby induced deformation. More specifically, is the displacement of the die hole or the edge 28 deposited relative to the deformation force. The investigation this relationship can be done with the help of suitable measurements or calculations, before production starts. The powder material to be pressed is known and also the density required for the compact. Hence the deformation can be in the case of the individual deformation forces, which is the difference between the pressing forces the stamp 16, 18 are formed, determine.

Während des Preßvorgangs werden ständig oder intermittierend mit Hilfe der Kraftmeßdosen 20, 22 die an den Preßstempeln 16, 18 wirkenden Preßkräfte gemessen und aus Ihnen die Verformungskraft berechnet. Im Rechner 30 wird die dazugehörige Verformung der Matrizenplatte 12 ermittelt bzw. die Verlagerung der Kante 28 der Matrizenplatte 12. Der Rechner 30 übermittelt daraus den Zustellweg des Preßstempels 16 und gibt auf eine Steuervorrichtung 32 ein entsprechendes Positioniersignal für Kraftglieder 34 bzw. 36 für die Preßstempel 16, 18. Auf diese Weise ist es möglich, unabhängig von der Verformung der Matrizenplatte 12 mit dem Oberstempel 16 exakt die Kante 28 und dem Unterstempel 18 die Kante 30 anzufahren. Denn bei einer Verformung der Matrizenplatte 12 findet auch eine Relativverlagerung von Unterstempel 18 und Matrizenplatte 12 statt, und der Unterstempel 18 ist vom Kraftglied 16 entsprechend zu positionieren, damit er an der Kante 30 verbleibt.During the pressing process, are continuously or intermittently with the help of Load cells 20, 22 measured the pressing forces acting on the press rams 16, 18 and calculated the deformation force from you. In the computer 30, the associated one Deformation of the die plate 12 is determined or the displacement of the Edge 28 of the die plate 12. From this, the computer 30 transmits the delivery route of the ram 16 and gives a corresponding to a control device 32 Positioning signal for force members 34 and 36 for the ram 16, 18. On this It is possible, regardless of the deformation of the die plate 12 the upper stamp 16 exactly the edge 28 and the lower stamp 18 the edge 30 to approach. This is because when the die plate 12 is deformed, there is also a Relative displacement of the lower stamp 18 and die plate 12 instead, and the lower stamp 18 is to be positioned by the force element 16 accordingly, so that it is on the Edge 30 remains.

Falls bei der Messung der Preßkräfte ein zu geringer Wert auftritt, erzeugt der Rechner 30 ein Abschaltsignal für die Preßvorrichtung 10. Dadurch wird eine Beschädigung von Stempel und Matrizenplatte vermieden.If the value of the pressing forces is too low, the computer generates 30 a shutdown signal for the press device 10. This will damage avoided by stamp and die plate.

Claims (4)

Verfahren zum Verpressen von Pulvermaterial zu einem Preßling vorgegebenen Dicke und mit mindestens einer seitlichen Schrägfläche mit Hilfe einer Bohrung in einer Matrizenplatte zur Aufnahme des Pulvermaterials und eines Ober- und eines Unterstempels, welche mittels einer hydraulischen Kraftvorrichtung betätigbar und mittels einer Steuervorrichtung bezüglich der Matrizenplatte positionierbar sind, mit den folgenden Schritten für verschiedene Preßkräfte werden die Verformungen der Matrizenplatte gemessen oder errechnet und die korrelierenden Werte in einem Speicher tabellarisch abgelegt, wobei die Verformungskräfte aus der Differenz der Preßkräfte beider Stempel ermittelt werden und während des Preßvorgangs wird die Verformung ermittelt durch Anwendung der gemessenen Verformungskraft auf die Tabelle und der Zustellweg von Ober- und Unterstempel nach Maßgabe der Verformung korrigiert. Method for compressing powder material to a compact of a given thickness and having at least one lateral inclined surface with the aid of a hole in a die plate for receiving the powder material and an upper and a lower punch, which can be actuated by means of a hydraulic power device and can be positioned with respect to the die plate by means of a control device , with the following steps for different pressing forces, the deformations of the die plate are measured or calculated and the correlating values are stored in a table in a memory, the deformation forces being determined from the difference between the pressing forces of the two punches and During the pressing process, the deformation is determined by applying the measured deformation force to the table and the feed path of the upper and lower punches is corrected in accordance with the deformation. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß während des Preßvorgangs die Verformungskraft kontinuierlich ermittelt wird.A method according to claim 1, characterized in that the deformation force is continuously determined during the pressing process. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kraftvorrichtung abgeschaltet wird, wenn die Preßkräfte bzw. die Verformungskraft unterhalb vorgegebener Werte liegen.Method according to Claim 1 or 2, characterized in that the force device is switched off when the pressing forces or the deformation force are below predetermined values. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß für eine Reihe unterschiedlicher Preßkräfte an den Stempeln deren Stauchformung gemessen oder errechnet und die korrelierenden Werte in einem Speicher tabellarisch abgelegt werden und Zustellung von Unter- und Oberstempel nach Maßgabe der Stauchung korrigiert werden.Method according to one of claims 1 to 3, characterized in that for a number of different pressing forces on the punches the compression formation is measured or calculated and the correlating values are stored in a table in a memory and the delivery of lower and upper punches are corrected in accordance with the compression.
EP02015132A 2001-07-19 2002-07-06 Method of compacting powder materials Expired - Lifetime EP1277564B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10135283 2001-07-19
DE10135283A DE10135283C2 (en) 2001-07-19 2001-07-19 Process for pressing powder material

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EP1277564A2 true EP1277564A2 (en) 2003-01-22
EP1277564A3 EP1277564A3 (en) 2004-01-28
EP1277564B1 EP1277564B1 (en) 2006-09-13

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EP (1) EP1277564B1 (en)
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DE102008035301B3 (en) * 2008-07-29 2010-03-25 Fette Gmbh powder Press
DE102013201312A1 (en) * 2013-01-28 2014-07-31 Robert Bosch Gmbh Core for inductor, has two parallel legs which are connected by yoke, and are arranged facing bottom portion and facing away from top portion
EP4034375A1 (en) 2019-09-27 2022-08-03 Korsch AG Device and method for monitoring a tablet press machine, preferably during continuous operation, by means of a measuring device attached to a press punch
CN113619177B (en) * 2021-07-07 2023-06-30 浙江明恩新材料科技有限公司 Production equipment of high-temperature-resistant modified material product

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951716A1 (en) * 1979-12-19 1981-07-02 Mannesmann AG, 4000 Düsseldorf Pressing system to compensate for fluctuations - measures displacement of powder in mould simultaneously with pressure
JPS579600A (en) * 1980-06-19 1982-01-19 Yoshitsuka Seiki:Kk Press and detecting method of its abnormal pressing force
US5043111A (en) * 1989-06-15 1991-08-27 Mannesmann Ag Process and apparatus for the manfuacture of dimensionally accurate die-formed parts
JPH049639A (en) * 1990-04-26 1992-01-14 Nippon Steel Corp Method for finding out friction coefficient at the time of die molding of powder
JPH0655297A (en) * 1991-07-01 1994-03-01 Yoshitsuka Seiki:Kk Method and device for compression controlling in powder molding press
DE19846210A1 (en) * 1998-10-07 2000-04-13 Dorst Masch & Anlagen Press for the production of moldings
US6074584A (en) * 1997-04-24 2000-06-13 Wilhelm Fette Gmbh Method and device for manufacturing pressed parts from hard metal, ceramic, sintered metal or likewise
EP1048450A2 (en) * 1999-04-30 2000-11-02 Wilhelm Fette GmbH Method to determine the position of a plunger in a powder press

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520203A1 (en) * 1985-06-05 1986-12-11 Wilhelm Fette Gmbh, 2053 Schwarzenbek ROTARY ROTARY TABLETING MACHINE AND METHOD FOR CONTROLLING YOUR PRINT ROLLERS
DE3823417A1 (en) * 1988-07-11 1990-01-18 Fette Wilhelm Gmbh METHOD AND DEVICE FOR MONITORING THE PRESSING FORCE OF THE STAMP OF A TABLET PRESS
US5211964A (en) * 1991-05-20 1993-05-18 Westinghouse Electric Corp. Press machine with means to adjust punching force
DE10010671C2 (en) * 2000-03-04 2002-03-14 Fette Wilhelm Gmbh Process for producing pressed parts by pressing metal powder and then sintering the compact

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951716A1 (en) * 1979-12-19 1981-07-02 Mannesmann AG, 4000 Düsseldorf Pressing system to compensate for fluctuations - measures displacement of powder in mould simultaneously with pressure
JPS579600A (en) * 1980-06-19 1982-01-19 Yoshitsuka Seiki:Kk Press and detecting method of its abnormal pressing force
US5043111A (en) * 1989-06-15 1991-08-27 Mannesmann Ag Process and apparatus for the manfuacture of dimensionally accurate die-formed parts
JPH049639A (en) * 1990-04-26 1992-01-14 Nippon Steel Corp Method for finding out friction coefficient at the time of die molding of powder
JPH0655297A (en) * 1991-07-01 1994-03-01 Yoshitsuka Seiki:Kk Method and device for compression controlling in powder molding press
US6074584A (en) * 1997-04-24 2000-06-13 Wilhelm Fette Gmbh Method and device for manufacturing pressed parts from hard metal, ceramic, sintered metal or likewise
DE19846210A1 (en) * 1998-10-07 2000-04-13 Dorst Masch & Anlagen Press for the production of moldings
EP1048450A2 (en) * 1999-04-30 2000-11-02 Wilhelm Fette GmbH Method to determine the position of a plunger in a powder press

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 069 (M-125), 30. April 1982 (1982-04-30) & JP 57 009600 A (YOSHITSUKA SEIKI:KK), 19. Januar 1982 (1982-01-19) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 159 (P-1339), 17. April 1992 (1992-04-17) & JP 04 009639 A (NIPPON STEEL CORP), 14. Januar 1992 (1992-01-14) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 289 (M-1614), 2. Juni 1994 (1994-06-02) & JP 06 055297 A (YOSHITSUKA SEIKI:KK), 1. März 1994 (1994-03-01) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103718259A (en) * 2011-07-27 2014-04-09 住友电气工业株式会社 Compressed powder compact
US9251946B2 (en) 2011-07-27 2016-02-02 Sumitomo Electric Industries, Ltd. Compact
CN103718259B (en) * 2011-07-27 2016-04-13 住友电气工业株式会社 Press-powder formed body
CN115093199A (en) * 2022-06-30 2022-09-23 蒋波 Special refractory crucible for negative electrode material carbonization and manufacturing process thereof
CN115093199B (en) * 2022-06-30 2023-12-22 青海天蓝新能源材料有限公司 Special refractory crucible for carbonization of negative electrode material and manufacturing process thereof

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US20030024418A1 (en) 2003-02-06
US6827889B2 (en) 2004-12-07
ATE339298T1 (en) 2006-10-15
DE50208114D1 (en) 2006-10-26
DE10135283C2 (en) 2003-09-18
EP1277564A3 (en) 2004-01-28
DE10135283A1 (en) 2003-02-20

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