EP0403038A2 - Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes - Google Patents

Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes Download PDF

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Publication number
EP0403038A2
EP0403038A2 EP90250137A EP90250137A EP0403038A2 EP 0403038 A2 EP0403038 A2 EP 0403038A2 EP 90250137 A EP90250137 A EP 90250137A EP 90250137 A EP90250137 A EP 90250137A EP 0403038 A2 EP0403038 A2 EP 0403038A2
Authority
EP
European Patent Office
Prior art keywords
press
stamp
punch
pressing
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
EP90250137A
Other languages
German (de)
English (en)
Other versions
EP0403038A3 (fr
EP0403038B1 (fr
Inventor
Gerd Dr.-Ing. Hinzmann
Norbert Dipl.-Ing. Nies
Siegfried Ing. Radewahn (Grad.)
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to AT90250137T priority Critical patent/ATE94464T1/de
Publication of EP0403038A2 publication Critical patent/EP0403038A2/fr
Publication of EP0403038A3 publication Critical patent/EP0403038A3/fr
Application granted granted Critical
Publication of EP0403038B1 publication Critical patent/EP0403038B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to a method for producing dimensionally stable compacts according to the preamble of claim 1 and a device for carrying it out.
  • the object of the invention is therefore to provide a method and an apparatus for carrying it out, with which the accuracy of the compact geometry can be further improved even in the case of compacts with several heels.
  • a device according to the invention is characterized by the features of claim 3 and is preferably equipped with the additional features of claim 4.
  • the correction of the desired positions is then carried out in such a way that the pressing surfaces of the upper and lower punches are moved closer or less closely together by approximately the amount of the stronger or weaker elastic deflection of the pressing die or the compression dies caused by the action of the pressing force.
  • the correction values can be based on e.g. spring characteristics of the respective ram and the press force measured during pressing are determined in preliminary tests. It is not absolutely necessary to carry out this correction for all stamps. In the case of a multi-punch tool, the original target position can often remain unchanged on such punches that are relatively short and / or thick-walled because of the only slight elastic deformation, while only the punch or stamps corrected with a less rigid spring characteristic with regard to their desired position in the sense according to the invention will.
  • a significant advantage of the method according to the invention can be seen in the fact that it is able to deliver parts with a precise compact geometry, even if the pressing forces and thus the size of the elastic deformation of the rams are subject to greater fluctuations during production, for example due to changes the pressability of the powder used are justified.
  • the picture shows schematically a section through a press tool in the press end position with an annular compact 1 made of steel powder.
  • the compact 1 which is surrounded by a jacket-shaped die 2, has three stages in cross section. For this reason, three coaxially guided, independently movable lower punches 3, 4, 5 are provided for powder compaction, which form the stepped underside, while the smooth surface of the compact 1 is formed by a single upper punch 6.
  • the distances between the press surfaces of the upper punch 6 and the lower punches 3, 4, 5 must be set exactly to the height of the compact steps in the press end position.
  • measuring systems are provided, which are shown schematically as a scale 7 and pointers 8, 9, 10.
  • the scale 7 is rigidly connected to the component 11 carrying the lower stamp 5, while the pointers 8, 9 and 10 are coupled in a corresponding manner to the components 12 and 13 and 14 carrying the lower stamp 3 and 4 or the upper stamp 6. Since the distances of the pointers 8, 9, 10 from the pressing surface of the punches 3, 4 and 6 and the distance of the pressing surface of the lower punch 5 from the zero point of the scale 7 are known, the desired positions of the pointers 8, 9 and 10 can be easily determined , in which the distances of the lower punches 3, 4, 5 from the upper punch 6 correspond exactly to the height gradation of the compact 1. However, these are still provisional target positions, since their determination was based on theoretically rigid press dies 3, 4, 5, 6. In fact, however, all the stamps 3, 4, 5, 6 undergo elastic deformation.
  • the deformation of the lower punch 3, 4, 5 should be noted because of their overall length and comparatively thin-walled design.
  • the lower punch 5, in the middle of which a mandrel 15 is guided, has a high degree of slenderness.
  • force measuring devices e.g. can be designed as a piezoelectric transducer, strain gauge or other measuring system, the pressing forces measured on the undersides of the lower punches 3, 4, 5.
  • An electronic control to which the measured values are supplied, calculates the actual deformation of the lower punches 3, 4, 5 based on the spring characteristics of the lower punches 3, 4, 5, which were determined or calculated in preliminary tests.
  • the provisional target positions of the lower punches 3, 4, 5 are then corrected by this amount of deformation, ie the pressing force of the lower punches 3, 4, 5 is increased until the distances of the pressing surfaces of the lower punches 3, 4, 5 to that of the upper punch 6, taking into account the elastic stamp deformations, correspond exactly to the desired height gradations of the compact 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Presses (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
EP90250137A 1989-06-15 1990-05-28 Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes Expired - Lifetime EP0403038B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90250137T ATE94464T1 (de) 1989-06-15 1990-05-28 Verfahren und vorrichtung zum herstellen von masshaltingen presslingen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919821A DE3919821C2 (de) 1989-06-15 1989-06-15 Verfahren und Vorrichtung zum Herstellen von maßhaltigen Preßlingen
DE3919821 1989-06-15

Publications (3)

Publication Number Publication Date
EP0403038A2 true EP0403038A2 (fr) 1990-12-19
EP0403038A3 EP0403038A3 (fr) 1991-03-27
EP0403038B1 EP0403038B1 (fr) 1993-09-15

Family

ID=6382945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250137A Expired - Lifetime EP0403038B1 (fr) 1989-06-15 1990-05-28 Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes

Country Status (5)

Country Link
US (1) US5043111A (fr)
EP (1) EP0403038B1 (fr)
JP (1) JPH0780073B2 (fr)
AT (1) ATE94464T1 (fr)
DE (2) DE3919821C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2688724A1 (fr) * 1992-03-23 1993-09-24 Mannesmann Ag Procede et dispositif pour fabriquer des corps comprimes a plusieurs gradins en une matiere pulverulente.
DE19502596A1 (de) * 1995-01-28 1996-08-14 Fette Wilhelm Gmbh Verfahren zur Erstellung eines Kraft-Weg-Diagramms der Preßstempel einer Rundläufer-Tablettenpresse
EP0873855A3 (fr) * 1997-04-24 1999-01-13 Fette, Wilhelm Procédé et dispositif pour la fabrication pièces moulées en métal dur, céramique, métal fritté ou similaire
WO2000020192A1 (fr) * 1998-10-07 2000-04-13 Dorst-Maschinen- Und Anlagen-Bau Gmbh & Co.Kg Presse pour produire des corps moules
CN102248705A (zh) * 2011-07-01 2011-11-23 宁波市北仑新港冶金机械有限公司 粉末成形机的多送料复合粉成型机构
CN119408226A (zh) * 2025-01-09 2025-02-11 极米(宁波)智能设备有限公司 一种粉末成型方法、系统及终端

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
USRE35506E (en) * 1991-11-12 1997-05-13 Chemplex Industries, Inc. Powder compacting press apparatus and methods
US5202067A (en) * 1991-11-12 1993-04-13 Chemplex Industries, Inc. Powder compacting press apparatus and methods
CH683243A5 (de) * 1991-11-15 1994-02-15 Laeis & Bucher Gmbh Verfahren zur Steuerung und/oder Regelung des Pressvorganges einer Steinpresse.
US5455002A (en) * 1992-03-12 1995-10-03 Aida Engineering, Ltd. Plastic working method for holed metal parts
DE69325924T2 (de) * 1993-11-24 2000-02-17 Stackpole Ltd., Mississauga Versetzte mehrteilige pressform
CA2154556C (fr) * 1993-11-24 2006-02-21 Gerd Hinzmann Filiere double pour piece a contre-depouille
US5580586A (en) * 1994-03-17 1996-12-03 Tamagawa Machinery Co., Ltd. Die control speed rate conversion device for powder mold press
US5840348A (en) * 1995-09-15 1998-11-24 Ultrapure Systems, Inc. Automated carbon block molding machine and method
US6165400A (en) * 1996-05-09 2000-12-26 Stackpole Limited Compacted-powder opposed twin-helical gears and method
US6440357B1 (en) 1996-05-09 2002-08-27 Stackpole Limited Compacted-powder opposed twin-helical gears and method
US6294113B1 (en) * 1998-11-16 2001-09-25 General Electric Company Touch sensing method
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
GB2360825B (en) * 2000-03-30 2004-11-17 Formflo Ltd Gear wheels roll formed from powder metal blanks
JP3687492B2 (ja) * 2000-06-21 2005-08-24 株式会社村田製作所 誘電体ブロックのプレス成形方法
DE10051236A1 (de) * 2000-10-16 2002-04-25 Dorst Masch & Anlagen Verfahren und Vorrichtung zum Bestimmen von Pressparametern zum Pressen komplex aufgebauter Presslinge
DE10135283C2 (de) * 2001-07-19 2003-09-18 Fette Wilhelm Gmbh Verfahren zum Verpressen von Pulvermaterial
DE10135523C2 (de) * 2001-07-20 2003-07-31 Dorst Masch & Anlagen Presseneinrichtung zum Herstellen maßhaltiger Presslinge aus pulverförmigen Metall
DE10142773C1 (de) * 2001-08-31 2003-03-06 Fette Wilhelm Gmbh Hydraulische Presse zum Pressen von Metallpulver
DE10142623C2 (de) * 2001-08-31 2003-11-06 Fette Wilhelm Gmbh Verfahren und Vorrichtung zur Minimierung der Streuung der maximalen Presskräfte in einer Pulverpresse
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
DE10212315B4 (de) * 2002-03-20 2004-04-29 Wilhelm Fette Gmbh Wegmeßsystem für eine Pulverpresse
DE10254656B4 (de) 2002-11-22 2005-10-13 Dorst Technologies Gmbh & Co. Kg Presseneinrichtung zum Herstellen maßhaltiger Presslinge mit zentraler Stempelabstützung
DE10355963A1 (de) * 2002-12-02 2004-06-24 Mold-Masters Limited, Georgetown Hubbegrenzer für einen Nadelventilbetätigungsmechanismus
DE10301224A1 (de) * 2003-01-15 2004-08-05 Maschinenfabrik Lauffer Gmbh & Co Kg Verfahren zur Endpositionsregelung einer Presse für maßgenaue Formkörper
EP1849590B1 (fr) * 2006-04-29 2013-05-15 Fette GmbH Presse
DE102010008986A1 (de) * 2010-02-24 2011-08-25 Dorst Technologies GmbH & Co. KG, 82431 Verfahren zur Pressparameteranpassung einer Keramik- oder Metallpulverpresse und Keramik- oder Metallpulverpresse zum Durchführen des Verfahrens
WO2012015243A2 (fr) * 2010-07-30 2012-02-02 Lg Innotek Co., Ltd. Appareil de frittage par presse à chaud et élément presse
CN116638816A (zh) * 2023-05-17 2023-08-25 宁波弘讯科技股份有限公司 产品尺寸调整方法、控制装置、液压机控制系统及液压机

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455823A (en) * 1948-03-03 1948-12-07 E J Lavino & Co Control apparatus for molding presses
FR1068723A (fr) * 1952-07-25 1954-06-30 L Morane Ets Presse à briques ou agglomérés
US3389432A (en) * 1966-04-18 1968-06-25 Cincinnati Shaper Co Load indicating device for compacting press
GB1216397A (en) * 1968-04-02 1970-12-23 Keith Marshall Improvements in or relating to tablet forming machines
DE2924704A1 (de) * 1979-06-19 1981-01-15 Dorst Keramikmasch Einrichtung zur festlegung der hoehe von pressteilen an einer presse, insbesondere zum pressen von pressteilen aus pulverfoermigem ausgangsmaterial
JPS6045039B2 (ja) * 1981-06-12 1985-10-07 株式会社ヨシツカ精機 粉末成形プレスにおける異常監視方法
DE3142126A1 (de) * 1981-10-23 1983-05-11 Dorst-Keramikmaschinen-Bau Otto Dorst U. Dipl.-Ing. Walter Schlegel, 8113 Kochel "presse zum herstellen masshaltiger presslinge aus pulverfoermigem material"
SE460460B (sv) * 1983-07-01 1989-10-16 Convey Teknik Ab Foerfarande och anordning foer reglerad pressning av pulvermaterial
SE456458B (sv) * 1983-07-12 1988-10-03 Nobel Elektronik Ab Reglerkrets
FR2570020B1 (fr) * 1984-09-11 1988-07-22 Commissariat Energie Atomique Presse automatique
JPS63256296A (ja) * 1987-04-13 1988-10-24 Hitachi Metals Ltd 粉末成形用ｎｃメカニカルプレス

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2688724A1 (fr) * 1992-03-23 1993-09-24 Mannesmann Ag Procede et dispositif pour fabriquer des corps comprimes a plusieurs gradins en une matiere pulverulente.
DE19502596A1 (de) * 1995-01-28 1996-08-14 Fette Wilhelm Gmbh Verfahren zur Erstellung eines Kraft-Weg-Diagramms der Preßstempel einer Rundläufer-Tablettenpresse
US5699273A (en) * 1995-01-28 1997-12-16 Wilhelm Fette Gmbh Method and apparatus for determining the force-displacement diagram of the pairs of punches of a rotary pelleting machine
EP0873855A3 (fr) * 1997-04-24 1999-01-13 Fette, Wilhelm Procédé et dispositif pour la fabrication pièces moulées en métal dur, céramique, métal fritté ou similaire
WO2000020192A1 (fr) * 1998-10-07 2000-04-13 Dorst-Maschinen- Und Anlagen-Bau Gmbh & Co.Kg Presse pour produire des corps moules
CN102248705A (zh) * 2011-07-01 2011-11-23 宁波市北仑新港冶金机械有限公司 粉末成形机的多送料复合粉成型机构
CN119408226A (zh) * 2025-01-09 2025-02-11 极米(宁波)智能设备有限公司 一种粉末成型方法、系统及终端

Also Published As

Publication number Publication date
EP0403038A3 (fr) 1991-03-27
JPH0318499A (ja) 1991-01-28
DE3919821A1 (de) 1990-12-20
DE3919821C2 (de) 1994-04-07
DE59002707D1 (de) 1993-10-21
ATE94464T1 (de) 1993-10-15
EP0403038B1 (fr) 1993-09-15
US5043111A (en) 1991-08-27
JPH0780073B2 (ja) 1995-08-30

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