EP1129802A2 - 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
EP1129802A2
EP1129802A2 EP01104107A EP01104107A EP1129802A2 EP 1129802 A2 EP1129802 A2 EP 1129802A2 EP 01104107 A EP01104107 A EP 01104107A EP 01104107 A EP01104107 A EP 01104107A EP 1129802 A2 EP1129802 A2 EP 1129802A2
Authority
EP
European Patent Office
Prior art keywords
pressing force
predetermined
stamp
punch
die
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
EP01104107A
Other languages
German (de)
English (en)
Other versions
EP1129802B2 (fr
EP1129802A3 (fr
EP1129802B1 (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
Wilhelm Fette GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Fette GmbH, Wilhelm 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
Anticipated expiration legal-status Critical
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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 producing pressed parts, in particular of carbide inserts, by pressing metal powder and subsequent sintering of the compact according to claim 1.
  • compliance is one predetermined total height between insert seat and at least one cutting edge, which has a predetermined distance from the insert seat.
  • the invention has for its object a method for producing Carbide inserts by pressing and sintering the compact, in particular of indexable inserts, to create that easier than the last described is known method and nevertheless leads to excellent results.
  • the invention also begins with one predetermined amount of metal powder filled into the die hole, the Lower stamp assumes a filling position. If necessary, the First move the lower stamp to a slightly lower position, so that a slight Excess quantity is filled, after which the lower stamp is the final one Fills the filling position and with the help of the filling shoe from the die hole ejected rest is stripped. Then the upper stamp and move the lower punch into a predetermined first or second position, whereby a certain pressing force can already be applied. Is it one Pressed part, which is intended for a cutting plate with clearance angle, corresponds to the position the upper stamp at the approached second position z. B. the top of the Compacts.
  • the lower and upper stamps are adjusted further, however, in the case of a compact with a clearance angle, only the lower stamp is adjusted.
  • the pressing forces are continuous measured, whereby the infeed movement of the lower and upper stamps is ended, when the pressing force has reached a predetermined value. Even with adjustment both stamps, it may be sufficient to measure the pressing force on the lower stamp alone and to end the adjustment movement when the measured pressing force reaches the predetermined one Has reached value.
  • the predetermined value for the pressing force is determined by previous tests determined. First of all, it is determined what compaction the metal powder should be obtained in order to then be subjected to the sintering process. Then it is examined how large the filling quantity must be, so that when a predetermined pressing force reproducibly reaches a certain height of the compact becomes. Is therefore in the method according to the invention at a predetermined Pressing force switched off, then it can be assumed that the predetermined Height of the compact has been reached. This way, too certain filling fluctuations reached a predetermined density of the compact.
  • the lower stamp is adjusted and / or upper stamp from the first or second position along a predetermined Target curve for the pressing force, the target curve being the dependence of the pressing force reproduces from time. In this way it is possible to get the final one to approach the desired pressing force values in a regulating manner.
  • FIG. 1 and 2 show a die 10, the bore of which forms a mold cavity 12, which is conical in cross section. With the help of such Mold cavity 12 can be formed as a compact Cutting plate, for example an indexable insert with clearance angle used becomes.
  • the upper edge of the mold cavity 12 has from the upper edge of the die 12 a distance x.
  • Above the die 12 is an upper punch 14 and below the die 10 a lower stamp 16 indicated.
  • the stamps 14, 16 are in actuated in a suitable manner, preferably with the aid of hydraulic cylinders. This are controllable (not shown) so that they exert a desired force. Moreover they can be controlled in their speed, e.g. Legs to generate the desired force-time curve.
  • the lower stamp 16 has a predetermined filling position.
  • the lower stamp 16 is also set to a predetermined one Move position, as shown in Fig. 2. Here takes place a pressing process is already taking place. Subsequently, the lower stamp 16 continues proceed until a specified pressing force has been reached.
  • the pressing force is like this dimensioned that the height of the to be molded for a given filling quantity Compacts (not shown) corresponds to the target height. Is the target height or target thickness has not yet been reached, it is necessary after sintering, the so shaped Edit plate to the desired size, e.g. B. to grind. Therefore it is too ensure that in the described method it is avoided that a compact is shaped with undersize.
  • FIGS. 3 and 4 differs from that according to the figures 1 and 2 only in that the bore of the die is cylindrical. With the help cutting insert produced by the method therefore has no clearance angle. in the rest of the embodiment of Figures 3 and 4 with the same reference numerals like Figure 1 provided.
  • Line 20 in FIG. 5 indicates the upper edge of the die.
  • the thick undressed Curve 22 indicates the position profile of an upper punch and the thickly drawn Curve 24 after a lower stamp, for example the stamp 14, 16 3 and 4.
  • the solid line 26 indicates the course of the position of the filling shoe.
  • the lower stamp has the position a corresponding to the top edge of the die and the top stamp is clearly located above the top edge of the die.
  • the filling shoe is over the die, and the lower punch moves into a first filling position b, during which one The die hole is filled with hard metal powder, as indicated at 28.
  • the filling is finished at c.
  • the lower stamp moves a little up to position d, which is the final fill position, d. H.
  • the powder column in the die hole corresponds to the specified filling quantity. Perhaps Excess material above the upper edge 20 of the die is then removed from the filling shoe stripped. The filling shoe then moves to its starting position, and the upper stamp moves to position P2, while the lower stamp at the same time moves back a little to prevent the upper punch from powder material presses out of the die hole laterally. Then the upper stamp move to position P3, with the lower punch the one previously taken Still maintains position. Now the pressing process begins, with the position P4 of upper and lower stamps via a predetermined path that the stamp cover, can be started. With the help of suitable signposts it is possible to provide a precise path control for the stamp. Here takes place a more or less significant compression of the powder material is already taking place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Coating Apparatus (AREA)
  • Punching Or Piercing (AREA)
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
DE10010671 2000-03-04
DE10010671A DE10010671C2 (de) 2000-03-04 2000-03-04 Verfahren zur Herstellung von Preßteilen durch Pressen von Metallpulver und anschließendes Sintern des Preßlings

Publications (4)

Publication Number Publication Date
EP1129802A2 true EP1129802A2 (fr) 2001-09-05
EP1129802A3 EP1129802A3 (fr) 2004-05-06
EP1129802B1 EP1129802B1 (fr) 2007-03-14
EP1129802B2 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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1287975A3 (fr) * 2001-08-31 2004-01-28 Fette GmbH Procédé pour la production d'éléments moulés dans une presse à poudre
EP2750151A4 (fr) * 2011-07-27 2015-03-11 Sumitomo Electric Industries Briquette en poudre comprimée
DE102010015016B4 (de) * 2009-04-24 2016-06-09 Sms Group Gmbh Pulverpresse

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
DE102004008322B4 (de) * 2004-02-20 2008-11-27 Fette Gmbh Pulverpresse
WO2008114827A1 (fr) * 2007-03-20 2008-09-25 Tungaloy Corporation Procédé de moulage par compression de plaquette jetable
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
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
SE546938C2 (en) 2019-12-17 2025-03-11 Kennametal Inc A method forforming a densified green article by subjecting a green article, formed by additive manufacturing techniques, and a powder pressure transfer media to cold or warm isostatic pressing
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

Family Cites Families (9)

* 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
DE2825253A1 (de) † 1978-06-08 1979-12-13 Nitrochemie Gmbh Hydraulische pulverpresse
SE460460B (sv) † 1983-07-01 1989-10-16 Convey Teknik Ab Foerfarande och anordning foer reglerad pressning av pulvermaterial
DE3715077A1 (de) † 1987-05-06 1988-12-01 Netzsch Maschinenfabrik Verfahren zum steuern einer presse
JP2519498B2 (ja) * 1988-01-16 1996-07-31 ファナック株式会社 電動式粉末成形機
DE3919821C2 (de) * 1989-06-15 1994-04-07 Mannesmann Ag Verfahren und Vorrichtung zum Herstellen von maßhaltigen Preßlingen
DE4209767C1 (fr) * 1992-03-23 1993-05-06 Mannesmann Ag, 4000 Duesseldorf, De
US5547360A (en) * 1994-03-17 1996-08-20 Tamagawa Machinery Co., Ltd. Powder molding press
DE19717217C2 (de) * 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Verfahren und Vorrichtung zur Herstellung von Preßlingen aus Hartmetall, Keramik, Sintermetall oder dergleichen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1287975A3 (fr) * 2001-08-31 2004-01-28 Fette GmbH Procédé pour la production d'éléments moulés dans une presse à poudre
DE102010015016B4 (de) * 2009-04-24 2016-06-09 Sms Group Gmbh Pulverpresse
EP2750151A4 (fr) * 2011-07-27 2015-03-11 Sumitomo Electric Industries Briquette en poudre comprimée
US9251946B2 (en) 2011-07-27 2016-02-02 Sumitomo Electric Industries, Ltd. Compact

Also Published As

Publication number Publication date
EP1129802B2 (fr) 2010-08-11
EP1129802A3 (fr) 2004-05-06
ATE356681T1 (de) 2007-04-15
EP1129802B1 (fr) 2007-03-14
DE10010671A1 (de) 2001-09-13
US20010022944A1 (en) 2001-09-20
US6562291B2 (en) 2003-05-13
DE10010671C2 (de) 2002-03-14
DE50112176D1 (de) 2007-04-26

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