EP0873855A2 - Procédé et dispositif pour la fabrication pièces moulées en métal dur, céramique, métal fritté ou similaire - Google Patents

Procédé et dispositif pour la fabrication pièces moulées en métal dur, céramique, métal fritté ou similaire Download PDF

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Publication number
EP0873855A2
EP0873855A2 EP98103085A EP98103085A EP0873855A2 EP 0873855 A2 EP0873855 A2 EP 0873855A2 EP 98103085 A EP98103085 A EP 98103085A EP 98103085 A EP98103085 A EP 98103085A EP 0873855 A2 EP0873855 A2 EP 0873855A2
Authority
EP
European Patent Office
Prior art keywords
stamp
ram
press
force
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.)
Granted
Application number
EP98103085A
Other languages
German (de)
English (en)
Other versions
EP0873855A3 (fr
EP0873855B1 (fr
Inventor
Jürgen Hinzpeter
Ingo Schmidt
Ulrich Gathmann
Jörg Reitberger
Klaus-Peter Preuss
Alexander Oldenburg
Joachim Greve
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
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
Application filed by Wilhelm Fette GmbH filed Critical Wilhelm Fette GmbH
Publication of EP0873855A2 publication Critical patent/EP0873855A2/fr
Publication of EP0873855A3 publication Critical patent/EP0873855A3/fr
Application granted granted Critical
Publication of EP0873855B1 publication Critical patent/EP0873855B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B22F3/03—Press-moulding apparatus therefor
    • 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
    • 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
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/22—Control arrangements for fluid-driven presses controlling the degree of pressure applied by the ram during the pressing stroke
    • 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 of manufacture of compacts made of hard metal, ceramic, sintered metal or the like according to the preamble of the claim 1.
  • the invention has for its object a method for the production of compacts from hard metal, ceramic, Specify sintered metal or the like in which a correction on the compact already during the pressing process can be made.
  • a device for performing the invention The method is specified in claim 2.
  • At least two position sensors provided, namely for the at least one press ram and the at least one further ram or one Section of the press ram, which their measured values each put on a tax calculator. Beyond that Press die or a section of the press die Force sensor assigned. Its values are also in the Tax calculator given.
  • the position sensors should ensure that e.g. at an upper and a lower stamp this a predetermined Approach position in the die to the given geometry to produce the compact and its dimensions to adhere to. Due to different filling can however, there are fluctuations in density that are avoided have to. Therefore, the invention provides another press ram or a press die section in front of the Control computer is operated when during each Pressing process a deviation from the desired density value is determined.
  • the control computer now runs in the Compression phase for each compact, a target-actual value comparison the measured force and displacement values with the target curve by.
  • the regulation applies and by actuating the further stamp or a stamp section becomes the one applied by the assigned drive Force component increased or decreased, i.e. of the corresponding stamp section becomes relative to the other Stamp or set back or to the counter surface.
  • the density of the compact is optimized while the dimensional accuracy of the compact through compliance the stamp path is reached.
  • either the top or the lower stamp of a press in coaxial sections divided, with the inner or outer stamp for the Optimization of density is used, depending on which Area of the compact it is not critical what distance they e.g. to the opposite surface.
  • a cutting insert according to the invention Process will be conveniently the inner lower stamp for density optimization used because the outer bottom surface of the insert opposite the top of the insert or Cutting edge must take a precise distance.
  • This outer, e.g. annular floor surface then forms the seat when clamping the insert.
  • the inner surface the opposite, the bottom of a corresponding recess forms, can be any distance within limits to the cutting edges.
  • a tool 10 of a press is shown with a die 12, an upper stamp 14, a lower stamp 16, which consists of an outer stamp 18 and a coaxial for this purpose arranged inner stamp 20 is composed.
  • the stamps 14, 18 and 20 are from a separate drive, a hydraulic cylinder, for example (see later on Fig. 4).
  • a mandrel 22 guided into a corresponding e.g. immersed central bore 24 of the upper punch 14.
  • the cutting edge can be seen at 28. It will formed that the upper stamp 14 over a predetermined Immerse the distance (immersion depth) in the bore of the die 12. Below that, the die hole has a conical one Section to form the clearance angle.
  • the total height of the compact 26 is denoted by h. It is determined by the immersion depth of the upper punch 14 and the immersion depth of the outer stamp 18. To a sharp To obtain cutting edge 28, the immersion depth is required of the upper stamp 14, i.e. of the Upper stamp 14 must be exact to the start of the clearance angle Immerse (point 28) in the die 12.
  • FIGS. 2a to 2d there are movement phases during manufacture of the compact 26 shown.
  • the lower punches 18, 20 the mold cavity 30 of the die 12 at the bottom, the mandrel 22 extending up to the top the die 12 extends.
  • the upper stamp 14 is located above the die 12 to the powder To be able to fill the starting material into the mold cavity 30.
  • the lower and upper stamps are used moved towards each other, as shown in Fig. 2b.
  • How recognizable two inner and outer stamps 20, 18 are common moved, but not synchronized, rather the Inner stamp 20 moved by a certain amount as the outer stamp 18.
  • FIG. 2c amplified which roughly reflects the state as he is also shown in Fig. 1.
  • the compact 26 is completed.
  • the upper stamp 14 is again in the Starting position returned, and the lower stamps 18, 20 push the compact 26 out of the die 12.
  • the stamp 14, 18, 20 are shown schematically omitting the die 12. It can be seen that they are connected to the pistons of hydraulic cylinders 32, 34 and 36, respectively. With the help of a sensor 38 or 40, the pressing forces of the cylinders 32 and 36 are measured. The output signals of the sensors 38, 40 go into one Control computer 42. The stamps 14, 18 and 20 are each a position sensor 44, 48 and 46 assigned, the output signals also get into the control computer 42. With the help of sensors 38, 40, the stamps 14, 18 applied forces monitored. With the help of the sensors 44, 46 and 48 are the paths of the stamps 14, 20 and 18 monitors.
  • the Stamp 14 and 18 controlled so that they the respective immersion depth cover until you reach a precise End position.
  • the Press force is known to be an indication of whether the desired Density of the material to be pressed at the respective Position of the stamp is reached.
  • the forces and thus also the deviations are associated with the Force sensor 38 or 40 measured. They are dashed in Fig. 3 indicated at 52. Such a deviation occurs on, the inner stamp 20 will be over its corresponding Cylinder 34 moves, either in the direction of the upper stamp 14 or away from it, depending on whether an increase or decrease in strength is required.
  • an additional press ram can also be provided, e.g. is guided radially to the bore of the die 12 there a desired increase or decrease in compression to make.
  • the control computer 42 is controlled via an operating computer 56, but what for the described function of Regulating a press is not important.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Control Of Presses (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Ceramic Products (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Punching Or Piercing (AREA)
EP98103085A 1997-04-24 1998-02-21 Procédé et dispositif pour la fabrication pièces moulées en métal dur, céramique, métal fritté ou similaire Expired - Lifetime EP0873855B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19717217A DE19717217C2 (de) 1997-04-24 1997-04-24 Verfahren und Vorrichtung zur Herstellung von Preßlingen aus Hartmetall, Keramik, Sintermetall oder dergleichen
DE19717217 1997-04-24

Publications (3)

Publication Number Publication Date
EP0873855A2 true EP0873855A2 (fr) 1998-10-28
EP0873855A3 EP0873855A3 (fr) 1999-01-13
EP0873855B1 EP0873855B1 (fr) 2006-01-18

Family

ID=7827546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98103085A Expired - Lifetime EP0873855B1 (fr) 1997-04-24 1998-02-21 Procédé et dispositif pour la fabrication pièces moulées en métal dur, céramique, métal fritté ou similaire

Country Status (4)

Country Link
US (1) US6074584A (fr)
EP (1) EP0873855B1 (fr)
AT (1) ATE315997T1 (fr)
DE (2) DE19717217C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020192A1 (fr) * 1998-10-07 2000-04-13 Dorst-Maschinen- Und Anlagen-Bau Gmbh & Co.Kg Presse pour produire des corps moules
DE19955196A1 (de) * 1999-11-16 2001-05-23 Korsch Pressen Ag Verfahren zum Konstanthalten der Bruchhärte von Tabletten
WO2010081650A1 (fr) * 2009-01-15 2010-07-22 Gkn Sinter Metals Holding Gmbh Procédé pour faire fonctionner une presse pour produire des ébauches de compact de hauteur constante à partir de substances pulvérulentes, appareil de commande pour presse de ce type et presse appropriée
WO2010000764A3 (fr) * 2008-07-02 2010-11-25 Basf Se Procédé de fabrication d'un corps moulé de type annulaire contenant des oxydes
WO2010115517A3 (fr) * 2009-04-09 2011-03-03 Gkn Sinter Metals Holding Gmbh Embrayage magnétique
ITMI20101299A1 (it) * 2010-07-15 2012-01-16 Rm Technology Engineering Di Maggioni Roberto Dispositivo di compressione di polveri e simili

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19949868B4 (de) * 1999-10-15 2005-01-20 R & D Carbon Ltd. Verfahren zur Herstellung von Kohlekörpern
DE10010671C2 (de) * 2000-03-04 2002-03-14 Fette Wilhelm Gmbh Verfahren zur Herstellung von Preßteilen durch Pressen von Metallpulver und anschließendes Sintern des Preßlings
DE10135283C2 (de) * 2001-07-19 2003-09-18 Fette Wilhelm Gmbh Verfahren zum Verpressen von Pulvermaterial
DE10142623C2 (de) 2001-08-31 2003-11-06 Fette Wilhelm Gmbh Verfahren und Vorrichtung zur Minimierung der Streuung der maximalen Presskräfte in einer Pulverpresse
DE10142772C2 (de) * 2001-08-31 2003-09-25 Fette Wilhelm Gmbh Verfahren zur Herstellung von Pressteilen in einer Pulverpresse
DE10142773C1 (de) * 2001-08-31 2003-03-06 Fette Wilhelm Gmbh Hydraulische Presse zum Pressen von Metallpulver
DE10151858A1 (de) * 2001-10-24 2003-05-08 Dorst Masch & Anlagen Verfahren zum Einstellen bzw. Überwachen eines Pressen-Werkzeugs und Pressen-Werkzeug bzw. Pressen-Steuereinrichtung dafür
DE10254656B4 (de) 2002-11-22 2005-10-13 Dorst Technologies Gmbh & Co. Kg Presseneinrichtung zum Herstellen maßhaltiger Presslinge mit zentraler Stempelabstützung
DE10256654B4 (de) * 2002-12-03 2009-04-09 Röltgen GmbH & Co. KG Tablettierpresse
US7014453B2 (en) * 2002-12-17 2006-03-21 Lear Corporation Machine having sensors for controlling molding operation
DE10301224A1 (de) * 2003-01-15 2004-08-05 Maschinenfabrik Lauffer Gmbh & Co Kg Verfahren zur Endpositionsregelung einer Presse für maßgenaue Formkörper
DE102004008322B4 (de) * 2004-02-20 2008-11-27 Fette Gmbh Pulverpresse
GB0702196D0 (en) * 2007-02-06 2007-03-14 3M Innovative Properties Co Device for producing a dental workpiece
EP1964664B1 (fr) 2007-02-27 2013-11-20 Maschinenfabrik Lauffer GmbH & Co. KG Procédé pour la commande d'une presse à poudre fabricant des pièces brutes
WO2008114827A1 (fr) * 2007-03-20 2008-09-25 Tungaloy Corporation Procédé de moulage par compression de plaquette jetable
GB0719824D0 (en) * 2007-10-11 2007-11-21 3M Innovative Properties Co Dental blank and method of making a dental ceramic blank
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
DE102016107362B4 (de) * 2016-04-20 2020-01-23 Federal-Mogul Bremsbelag Gmbh Pressen mindestens einer Pressmasse mittels mehrerer Pressstempel
EP3403817B1 (fr) * 2017-05-18 2024-04-03 Walter Ag Plaque de coupe et procédé pour réaliser un corps cru de la plaque de découpe
CH716048B1 (de) * 2019-04-09 2024-02-15 Dietmar Kramer Dr Sc Techn Eth Phd Verfahren sowie eine Messeinrichtung zum Ausmessen von Utensilien für Pressen.
DE102021206078A1 (de) 2021-06-15 2022-12-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Vorrichtung und Verfahren zum Einspannen plattenförmiger Bauteile
CN120245168B (zh) * 2025-05-29 2025-09-09 莱州众安汽车零部件有限公司 一种汽车刹车盘自动化铸造工艺

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE2520662C3 (de) * 1975-05-09 1983-11-03 Wilhelm Fette Gmbh, 2053 Schwarzenbek Einrichtung zum Überwachen der Preßkräfte der Stempel einer Tablettenpresse
GB2031788B (en) * 1978-10-19 1982-09-08 Ptx Pentronix Apparatus and method for compacting prismatic or pyramidalarticles from powder material
DE3823417A1 (de) * 1988-07-11 1990-01-18 Fette Wilhelm Gmbh Verfahren und einrichtung zum ueberwachen der presskraefte der stempel einer tablettenpresse
FR2638118A1 (fr) * 1988-10-20 1990-04-27 Adl Automation Procede et appareil pour la compression et le controle de la compression de matieres pulverulentes et presse en faisant application
DE3919821C2 (de) * 1989-06-15 1994-04-07 Mannesmann Ag Verfahren und Vorrichtung zum Herstellen von maßhaltigen Preßlingen
DE9102414U1 (de) * 1991-02-26 1991-05-16 Mannesmann AG, 4000 Düsseldorf Presse mit fortlaufender Preßkrafterfassung
JPH07112638B2 (ja) * 1991-05-02 1995-12-06 株式会社ヨシツカ精機 粉末成形プレスの加圧制御方法
DE4209767C1 (fr) * 1992-03-23 1993-05-06 Mannesmann Ag, 4000 Duesseldorf, De
US5476631A (en) * 1992-06-09 1995-12-19 Cincinnati Incorporated Method and apparatus for adaptive powder fill adjustment on powder metal compacting presses

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020192A1 (fr) * 1998-10-07 2000-04-13 Dorst-Maschinen- Und Anlagen-Bau Gmbh & Co.Kg Presse pour produire des corps moules
DE19955196A1 (de) * 1999-11-16 2001-05-23 Korsch Pressen Ag Verfahren zum Konstanthalten der Bruchhärte von Tabletten
WO2010000764A3 (fr) * 2008-07-02 2010-11-25 Basf Se Procédé de fabrication d'un corps moulé de type annulaire contenant des oxydes
CN102137750A (zh) * 2008-07-02 2011-07-27 巴斯夫欧洲公司 制备氧化的环状成型体的方法
CN102137750B (zh) * 2008-07-02 2015-02-18 巴斯夫欧洲公司 制备氧化的环状成型体的方法
WO2010081650A1 (fr) * 2009-01-15 2010-07-22 Gkn Sinter Metals Holding Gmbh Procédé pour faire fonctionner une presse pour produire des ébauches de compact de hauteur constante à partir de substances pulvérulentes, appareil de commande pour presse de ce type et presse appropriée
WO2010115517A3 (fr) * 2009-04-09 2011-03-03 Gkn Sinter Metals Holding Gmbh Embrayage magnétique
ITMI20101299A1 (it) * 2010-07-15 2012-01-16 Rm Technology Engineering Di Maggioni Roberto Dispositivo di compressione di polveri e simili

Also Published As

Publication number Publication date
DE19717217C2 (de) 1999-12-02
ATE315997T1 (de) 2006-02-15
DE19717217A1 (de) 1998-10-29
EP0873855A3 (fr) 1999-01-13
DE59813346D1 (de) 2006-04-06
US6074584A (en) 2000-06-13
EP0873855B1 (fr) 2006-01-18

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