EP1129802B2 - Procédé pour controler la force de pressage pour la compression de poudre métallique - Google Patents

Procédé pour controler la force de pressage pour la compression de poudre métallique Download PDF

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Publication number
EP1129802B2
EP1129802B2 EP01104107A EP01104107A EP1129802B2 EP 1129802 B2 EP1129802 B2 EP 1129802B2 EP 01104107 A EP01104107 A EP 01104107A EP 01104107 A EP01104107 A EP 01104107A EP 1129802 B2 EP1129802 B2 EP 1129802B2
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EP
European Patent Office
Prior art keywords
ram
predetermined
compressive force
die
compact
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.)
Expired - Lifetime
Application number
EP01104107A
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German (de)
English (en)
Other versions
EP1129802B1 (fr
EP1129802A2 (fr
EP1129802A3 (fr
Inventor
Jürgen Hinzpeter
Ulrich Zeuschner
Thomas Pannewitz
Ulf Hauschild
Klaus Peter Rüssmann
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.)
Fette GmbH
Original Assignee
Fette GmbH
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Filing date
Publication date
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Application filed by Fette GmbH filed Critical Fette GmbH
Publication of EP1129802A2 publication Critical patent/EP1129802A2/fr
Publication of EP1129802A3 publication Critical patent/EP1129802A3/fr
Application granted granted Critical
Publication of EP1129802B1 publication Critical patent/EP1129802B1/fr
Publication of EP1129802B2 publication Critical patent/EP1129802B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • 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
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to a method for the production of pressed parts, in particular of cutting inserts made of hard metal, by pressing of metal powder and subsequent sintering of the compact according to claim 1.
  • z. B. for carbide inserts is the maintenance of a predetermined total height between the insert seat and at least one cutting edge having a predetermined distance from the insert seat.
  • EP-A-0 358 770 is a method for the production of pressed parts by pressing metal powder has become known, in which the stamp are driven to a pressing force end value. To operate the stamp an electric motor operated spindle drive is used.
  • the invention has for its object to provide a method for producing carbide inserts by pressing and sintering of the compact, in particular indexable inserts, which is simpler than the last-described known method and yet leads to excellent results.
  • the lower punch in this case occupies a filling position.
  • the lower punch is first moved to a slightly lower position, so that a slight oversupply is filled, after which then the lower punch occupies the final filling position and is stripped with the help of the filling shoe ejected from the die bore rest.
  • upper punch and lower punch are moved to a predetermined first or second position, with a certain compressive force can already be applied.
  • the position of the upper punch at the approached first position corresponds to the upper edge of the compact.
  • a further adjustment of the lower punch only. In this adjustment, the pressing forces are continuously measured, the feed movement from the lower punch along a predetermined setpoint curve for the pressing force over time and is terminated when the pressing force has reached a predetermined maximum value.
  • the predetermined maximum value for the pressing force is determined by previous attempts. First of all, it is determined which compression the metal powder is to receive, in order then to be exposed to the sintering process. Then it is examined how large the filling amount must be so that when applying a predetermined pressing force a certain height of the compact is reproducibly achieved. Becomes therefore switched off in the inventive method at a predetermined pressing force, then it can be assumed that the predetermined height of the compact has been achieved. In this way, a given density of the compact is achieved even with certain Greschwankept. Since filling fluctuations of the compact are not completely ruled out, it is preferable to proceed in such a way that given existing tolerances in case of doubt, there is a certain degree of oversight when switching off for a given pressing force value. If excessive, the compact is processed, preferably by grinding, to bring it to the predetermined height or thickness.
  • a die 10 is shown, whose bore has a mold cavity 12, which is conical in cross-section. With the aid of such a mold cavity 12, a compact can be produced, which is used as an insert, for example, a clearance angle insert.
  • the upper edge of the mold cavity 12 from the upper edge of the die 12 has a distance x.
  • an upper punch 14 and below the die 10, a lower punch 16 is indicated.
  • the punches 14, 16 are suitably operated by hydraulic cylinders. These are so controllable (not shown) that they apply a desired force. In addition, they can be speed controlled to produce a desired force-time curve.
  • the lower punch 16 When filling the die bore, the lower punch 16 has a predetermined filling position. Its position determines the filling quantity.
  • the lower punch 16 is moved into the die bore, wherein the upper punch 14 so far hineinafter that it comes to rest on the top of the mold cavity 12.
  • the entry depth into the die bore thus corresponds to the dimension x.
  • the lower punch 16 is also moved to a predetermined position, such as in Fig. 2 is shown. This is already an injection process. Subsequently, the lower punch 16 is moved further until a predetermined pressing force has been reached.
  • the pressing force is such that, for a given filling quantity, the height of the compact to be formed (not shown) corresponds to the desired height. If the desired height or thickness has not yet been reached, it is necessary after sintering to edit the plate thus formed to the desired level, for. B. to grind. Therefore, care must be taken to avoid that a compact is formed with undersize in the method described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Punching Or Piercing (AREA)
  • Coating Apparatus (AREA)

Claims (1)

  1. Procédé de fabrication de plaquettes de coupe tournantes en métal dur avec des angles libres, par compression de poudre métallique suivie d'un frittage du comprimé, en particulier présentant une surface formant un siège et au moins un bord de coupe sensiblement parallèle à la surface formant le siège qui est disposé à une distance prédéterminée de la surface formant le siège, à l'aide d'une presse comportant une matrice ainsi qu'un poinçon supérieur et un poinçon inférieur, les poinçons étant actionnés à l'aide de vérins hydrauliques, ce procédé comprenant les étapes consistant à:
    - verser une quantité prédéterminée de poudre métallique dans l'alésage de la matrice, le poinçon inférieur présentant une position de remplissage prédéterminée dans l'alésage de la matrice et le poinçon supérieur se trouvant au-dessus de l'alésage de la matrice,
    - déplacer le poinçon supérieur dans l'alésage de la matrice dans une première position prédéterminée correspondant au bord supérieur du comprimé et déplacer le poinçon inférieur dans une deuxième position prédéterminée, seul le poinçon inférieur étant déplacé ensuite,
    - ultérieurement déplacer encore le poinçon inférieur jusqu'au poinçon supérieur et mesurer en même temps la force de compression du poinçon inférieur, le déplacement du poinçon inférieur étant effectué le long d'une courbe théorique prédéterminée pour la force de compression par rapport au temps afin du rapprochement réglant aux valeurs de la force de compression finale et
    - terminer le mouvement d'avancée du poinçon inférieur lorsqu'une valeur maximale prédéterminée pour la force de compression a été atteinte, seul le poinçon inférieur étant déplacé à partir de la deuxième position jusqu'à une valeur prédéterminée de la force de compression et le long de la courbe théorique pour la force de compression par rapport au temps, jusqu'à ce que la valeur prédéterminée pour la force de compression soit atteinte.
EP01104107A 2000-03-04 2001-02-21 Procédé pour controler la force de pressage pour la compression de poudre métallique Expired - Lifetime EP1129802B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10010671A DE10010671C2 (de) 2000-03-04 2000-03-04 Verfahren zur Herstellung von Preßteilen durch Pressen von Metallpulver und anschließendes Sintern des Preßlings
DE10010671 2000-03-04

Publications (4)

Publication Number Publication Date
EP1129802A2 EP1129802A2 (fr) 2001-09-05
EP1129802A3 EP1129802A3 (fr) 2004-05-06
EP1129802B1 EP1129802B1 (fr) 2007-03-14
EP1129802B2 true EP1129802B2 (fr) 2010-08-11

Family

ID=7633551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01104107A Expired - Lifetime EP1129802B2 (fr) 2000-03-04 2001-02-21 Procédé pour controler la force de pressage pour la compression de poudre métallique

Country Status (4)

Country Link
US (1) US6562291B2 (fr)
EP (1) EP1129802B2 (fr)
AT (1) ATE356681T1 (fr)
DE (2) DE10010671C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017004803A1 (de) 2017-05-18 2018-11-22 Cosateq Gmbh Verfahren zum Betrieb einer Pulverpresse mit Lagenregelung und Pulverpresse zur Ausführung des Verfahrens
DE102017119342A1 (de) 2017-08-24 2019-02-28 COSATEQ GmbH & Co. KG Verfahren zur Steuerung einer Metall- oder Keramikpulverpresse mit automatischer Trajektorien-Generierung

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10135283C2 (de) * 2001-07-19 2003-09-18 Fette Wilhelm Gmbh Verfahren zum Verpressen von Pulvermaterial
DE10142772C2 (de) * 2001-08-31 2003-09-25 Fette Wilhelm Gmbh Verfahren zur Herstellung von Pressteilen in einer Pulverpresse
DE102004008322B4 (de) 2004-02-20 2008-11-27 Fette Gmbh Pulverpresse
EP2123435B1 (fr) * 2007-03-20 2016-03-09 Tungaloy Corporation Procédé de moulage par compression d'un insert de coupe
DE102010015016B4 (de) * 2009-04-24 2016-06-09 Sms Group Gmbh Pulverpresse
JP5032690B1 (ja) * 2011-07-27 2012-09-26 住友電気工業株式会社 圧粉成形体
DE102012019312A1 (de) * 2012-10-01 2014-04-03 Dorst Technologies Gmbh & Co. Kg Verfahren zum Steuern einer Keramik- und/oder Metallpulver-Presse bzw. Keramik- und/oder Metallpulver-Presse
MA42058A (fr) * 2015-05-07 2018-03-14 Thermal Tech Llc Appareil de frittage par compression comprenant des mâchoires opposées protégées
EP4079427A1 (fr) * 2021-04-22 2022-10-26 GKN Sinter Metals Engineering GmbH Procédé de détermination d'un paramétré d'une matière et outil de compression destiné à la fabrication d'un comprimé cru

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2825253A1 (de) † 1978-06-08 1979-12-13 Nitrochemie Gmbh Hydraulische pulverpresse
US4695414A (en) † 1983-07-01 1987-09-22 Convey Teknik Ab Method and apparatus for pressing powder material
DE3715077A1 (de) † 1987-05-06 1988-12-01 Netzsch Maschinenfabrik Verfahren zum steuern einer presse
EP0358770A1 (fr) † 1988-01-16 1990-03-21 Fanuc Ltd. Machine electrique de moulage de poudre
DE4209767C1 (fr) † 1992-03-23 1993-05-06 Mannesmann Ag, 4000 Duesseldorf, De
DE19717217C2 (de) † 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Verfahren und Vorrichtung zur Herstellung von Preßlingen aus Hartmetall, Keramik, Sintermetall oder dergleichen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000231A (en) * 1974-09-16 1976-12-28 Hydramet American Inc. Method for compacting powders
DE3919821C2 (de) * 1989-06-15 1994-04-07 Mannesmann Ag Verfahren und Vorrichtung zum Herstellen von maßhaltigen Preßlingen
US5547360A (en) * 1994-03-17 1996-08-20 Tamagawa Machinery Co., Ltd. Powder molding press

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2825253A1 (de) † 1978-06-08 1979-12-13 Nitrochemie Gmbh Hydraulische pulverpresse
US4695414A (en) † 1983-07-01 1987-09-22 Convey Teknik Ab Method and apparatus for pressing powder material
DE3715077A1 (de) † 1987-05-06 1988-12-01 Netzsch Maschinenfabrik Verfahren zum steuern einer presse
EP0358770A1 (fr) † 1988-01-16 1990-03-21 Fanuc Ltd. Machine electrique de moulage de poudre
EP0358770B1 (fr) † 1988-01-16 1993-10-27 Fanuc Ltd. Machine electrique de moulage de poudre
DE4209767C1 (fr) † 1992-03-23 1993-05-06 Mannesmann Ag, 4000 Duesseldorf, De
DE19717217C2 (de) † 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Verfahren und Vorrichtung zur Herstellung von Preßlingen aus Hartmetall, Keramik, Sintermetall oder dergleichen

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Anlage 1: Vortrag von Herrn Ing. (HTL) Peter Kunz †
Anlage 2: Benutzeroberfläche für Eingaben des Benutzers der vorgenannten Presse †
Anlage 3: Rechnung Nr. 60'975a vom 3.3.1999 †
Libo Yang, Gopi Venkatesh, Reza Fassihi: "Compaction simulator study of a novel triple-layer tablet matrix for industrial tableting", International Journal of Pharmaceutics, Volume 152, Issue 1, 13 June 1997, pages 45-52 †

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017004803A1 (de) 2017-05-18 2018-11-22 Cosateq Gmbh Verfahren zum Betrieb einer Pulverpresse mit Lagenregelung und Pulverpresse zur Ausführung des Verfahrens
WO2018210448A2 (fr) 2017-05-18 2018-11-22 Cosateq Gmbh Procédé de fonctionnement d'une presse à poudre à régulation de position et presse à poudre pour mettre en œuvre le procédé
DE102017119342A1 (de) 2017-08-24 2019-02-28 COSATEQ GmbH & Co. KG Verfahren zur Steuerung einer Metall- oder Keramikpulverpresse mit automatischer Trajektorien-Generierung

Also Published As

Publication number Publication date
DE10010671C2 (de) 2002-03-14
DE10010671A1 (de) 2001-09-13
DE50112176D1 (de) 2007-04-26
EP1129802B1 (fr) 2007-03-14
US6562291B2 (en) 2003-05-13
EP1129802A2 (fr) 2001-09-05
EP1129802A3 (fr) 2004-05-06
ATE356681T1 (de) 2007-04-15
US20010022944A1 (en) 2001-09-20

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