EP1566231B1 - Presse à poudre - Google Patents

Presse à poudre Download PDF

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Publication number
EP1566231B1
EP1566231B1 EP05001884A EP05001884A EP1566231B1 EP 1566231 B1 EP1566231 B1 EP 1566231B1 EP 05001884 A EP05001884 A EP 05001884A EP 05001884 A EP05001884 A EP 05001884A EP 1566231 B1 EP1566231 B1 EP 1566231B1
Authority
EP
European Patent Office
Prior art keywords
rams
powder
press
hydraulic cylinder
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.)
Not-in-force
Application number
EP05001884A
Other languages
German (de)
English (en)
Other versions
EP1566231A3 (fr
EP1566231A2 (fr
Inventor
Jürgen Hinzpeter
Ingo Schmidt
Andreas Groth
Andreas Teetzen
Thomas Pannewitz
Holger Behns
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
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 Fette GmbH filed Critical Fette GmbH
Publication of EP1566231A2 publication Critical patent/EP1566231A2/fr
Publication of EP1566231A3 publication Critical patent/EP1566231A3/fr
Application granted granted Critical
Publication of EP1566231B1 publication Critical patent/EP1566231B1/fr
Not-in-force legal-status Critical Current
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
    • 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
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams
    • B30B15/067—Press rams with means for equalizing the pressure exerted by a plurality of press rams
    • 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
    • B22F2003/033—Press-moulding apparatus therefor with multiple punches working in the same direction
    • 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 powder press for the production of compacts of powdered molding material according to the claim.
  • a press has an upper and a lower punch, which interact with a die or a die bore in a die plate.
  • the punches are driven by a suitable power drive, either mechanically or hydraulically via suitable hydraulic cylinders. It is known to arrange the die plate firmly and to move upper and lower punches or alternatively to move the die plate and to adjust the upper punch, while the lower punch remains stationary.
  • Hydraulic presses have the advantage that a relatively freely programmable pressing process can be achieved.
  • Out DE 4 209 767 C1 It is known to measure the pressing force in order to achieve the most uniform possible density within a batch. Depending on the measured pressing force is then a Correction made over the filling for the subsequent compacts.
  • the position of the stamp is determined and measured the associated pressing force. The approach of a certain position leads to a relatively high dimensional accuracy, may cause different densities. If, however, the pressing process is terminated at a preset pressing force, there is a risk that the compact has different thicknesses.
  • the aim of all procedures is to ensure, with the aid of suitable control measures, that the same pressing result is always achieved even with changing powder within a batch.
  • a production cycle consists of several phases: filling of the material, collapse of the punches, compacting of the pressing material, press holding time, extension of the compact and its removal.
  • the removal is usually carried out by an automatic removal system.
  • To increase the output of the press an attempt is made to shorten the times of the individual phases.
  • the times for compacting the powder, the press holding time and the time for extending the compact depend on the type of powder used and the geometry of the compact. Too short compression, Presshalte- and ejection times lead to hairline cracks in the compact, which must be avoided at all costs. For this reason, the output of modern hydraulic powder presses is currently limited to max. 30 pieces per minute limited.
  • the invention has for its object to provide a powder press for the production of compacts of powdered molding material with which the ejection performance can be significantly increased without a loss of press accuracy must be accepted.
  • a fixed or movable die plate is provided with at least two dies or a die with at least two die holes.
  • at least two upper punches are furthermore provided, which interact with the dies or die bores and act individually or are mechanically coupled. They are operated by two or a single hydraulic cylinder.
  • at least two lower punches are provided which cooperate with the dies or die bores and each have their own drive by means of a hydraulic cylinder.
  • the upper stamps are assigned one or two position sensors and the lower stamps each have one or two position sensors.
  • the hydraulic cylinders are assigned a force sensor.
  • a process computer for the powder press according to the invention on at least three controllers, namely a controller for the hydraulic cylinder of the upper or lower punch and in each case a controller for the hydraulic cylinder of the lower or upper punch.
  • the algorithm by which the individual controllers operate can be formulated in a conventional manner. So z. As a rule after a Kraftweg- or a power timing diagram or even after the energy input possible. In all regulations, the target diagram must first be determined with the aid of suitable tests and measurements, which are then regu- lated during the actual production.
  • the powder press according to the invention With the help of the powder press according to the invention, two or more compacts can be produced simultaneously, whereby the Prcssvorêt be influenced separately for the individual compacts, whereby z. B. Powder fluctuations and tool tolerances be compensated.
  • the powder press according to the invention thus enables a large pressing accuracy by separately influencing the pressing operations.
  • the removal of the finished compacts by the sampling system can be done in one or more steps, the removal is preferable in one step because of the shorter cycle time. Due to the simultaneous pressing and removal of several compacts, the ejection capacity of the press is multiplied according to the number of simultaneously pressed compacts, without the pressing accuracy suffers.
  • a press for pressing powdered press material is shown schematically. It has a fixed die plate 10, which contains two dies 12, 14, each with a die bore. Above the die plate 10, two upper punches 16 are arranged, which cooperate with the dies 12, 14. The upper punches 16 are mechanically coupled to each other by a block 18. The block 18 is actuated by a hydraulic cylinder 20.
  • Two lower punches 22 cooperate with the dies 12, 14 and are each actuated by a hydraulic cylinder 24 and 26, respectively.
  • the upper stamp 16 is a Assigned to the position sensor 28 and the hydraulic cylinder 20, a force sensor 30 is assigned.
  • the actuation of the hydraulic cylinder and the upper punch 16 takes place with the aid of a controller 32 in accordance with the values of force sensor 30 and position sensor 28 according to a predetermined algorithm, for example a force path or force time diagram.
  • a controller 32 As an actuator serves a control valve 34 for the hydraulic cylinder 20th
  • the lower punches 22 each have their own position sensors 36 and 38, respectively, and the force applied by the hydraulic cylinders 24, 26 is determined with separate force sensors 40 and 42, respectively.
  • the algorithm for the controllers 44, 46 corresponds to z. B. after which the controller 32 operates.
  • the manipulated variables of the regulators 44 and 46 are applied to the hydraulic cylinders 24, 26 via control valves 48 and 50, respectively.
  • a hydraulic drive assembly 50 has two concentrically arranged annular piston 52, 56 which are guided in corresponding annular cylinders.
  • annular piston 52, 56 which are guided in corresponding annular cylinders.
  • each ring piston can be detected separately in its position and in view of the pressing forces.

Claims (3)

  1. Presse à poudre pour la production de pièces moulées à partir d'une matière à mouler sous forme pulvérulente, avec les caractéristiques suivantes:
    • un support de matrice (10) avec au moins deux matrices (12, 14) ou avec une matrice avec au moins deux alésages de matrice,
    • au moins deux poinçons supérieurs, qui co-opèrent avec les matrices (12) ou respectivement les alésages de matrice,
    • un ou deux cylindres hydrauliques (20) pour les poinçons supérieurs (16),
    • au moins deux poinçons inférieurs (22), qui co-opèrent avec les matrices (14) ou respectivement les alésages de matrice,
    • un cylindre hydraulique (24, 26) pour chacun des poinçons inférieurs (22),
    • au moins un détecteur de position pour les poinçons supérieurs (16) et au moins un détecteur de force (30) pour le ou les cylindre(s) hydraulique(s) (30) des poinçons supérieurs,
    au moins un détecteur de position (28) pour chacun des poinçons inférieurs (22) et au moins un détecteur de force (40, 42) pour chacun des cylindres hydrauliques (24, 26) des poinçons inférieurs,
    • un régulateur (32) pour le ou les cylindre(s) hydraulique(s) (20) pour les poinçons supérieurs (16),
    • un régulateur (44, 46) pour chacun des cylindres hydrauliques (24, 26) pour les poinçons inférieurs (22).
  2. Presse à poudre selon la revendication 1, caractérisé en ce que les poinçons supérieurs (16) ou les poinçons inférieurs (22) sont couplés mécaniquement et connectés à un cylindre hydraulique (20), et un seul détecteur de position (28) est pourvu pour les poinçons supérieurs (16).
  3. Presse à poudre selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que dans le cas de cylindres hydrauliques séparés pour les poinçons inférieurs, des cylindres annulaires (50) avec des pistons annulaires (52, 56) sont pourvus.
EP05001884A 2004-02-20 2005-01-29 Presse à poudre Not-in-force EP1566231B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004008322A DE102004008322B4 (de) 2004-02-20 2004-02-20 Pulverpresse
DE102004008322 2004-02-20

Publications (3)

Publication Number Publication Date
EP1566231A2 EP1566231A2 (fr) 2005-08-24
EP1566231A3 EP1566231A3 (fr) 2007-01-03
EP1566231B1 true EP1566231B1 (fr) 2010-09-08

Family

ID=34706867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05001884A Not-in-force EP1566231B1 (fr) 2004-02-20 2005-01-29 Presse à poudre

Country Status (4)

Country Link
US (1) US7351048B2 (fr)
EP (1) EP1566231B1 (fr)
AT (1) ATE480351T1 (fr)
DE (2) DE102004008322B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101586A1 (de) 2015-02-04 2016-08-04 Fette Compacting Gmbh Pulverpresse zur Herstellung von Presslingen aus pulverförmigem Pressmaterial

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0710071A2 (pt) * 2006-02-22 2011-08-02 Hydraform Developments Proprietary Ltd máquina automática de fabricar blocos
DE102006020213B4 (de) * 2006-05-02 2009-09-10 Fette Gmbh Presse zur Herstellung von Preßlingen aus Pulvermaterial
DE102008035301B3 (de) * 2008-07-29 2010-03-25 Fette Gmbh Pulverpresse
DE102009004620A1 (de) * 2009-01-15 2010-07-22 Gkn Sinter Metals Holding Gmbh Verfahren zum Betrieb einer Pressvorrichtung zur Herstellung von Presslingen konstanter Höhe aus pulverförmigen Stoffen, Steuergerät für eine derartige Pressvorrichtung und Pressvorrichtung
US9314842B2 (en) * 2011-12-02 2016-04-19 Wildcat Discovery Technologies, Inc. Hot pressing apparatus and method for same
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
DE102014105172B4 (de) * 2014-04-11 2023-06-15 Vacuumschmelze Gmbh & Co. Kg Verfahren zur simultanen herstellung von wenigstens zwei permanentmagneten
JP6308195B2 (ja) * 2015-10-06 2018-04-11 トヨタ自動車株式会社 粉末成形装置の制御方法
CN109822964A (zh) * 2019-03-08 2019-05-31 萍乡鹏华液压机械制造有限公司 全自动碳化钨、碳化钛粉液压机
CN110385882B (zh) * 2019-06-17 2021-07-23 国网湖南省电力有限公司 氧化锌粉料压接成型装置

Family Cites Families (14)

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DE1759429C3 (de) * 1968-04-30 1973-12-20 Villeroy & Boch Keramische Werke Kg, 6642 Mettlach Vorrichtung zum gleichzeitigen Pressen mehrerer plattenförmiger Presslinge
US3890413A (en) * 1974-08-15 1975-06-17 Hydramet American Inc Apparatus and method for compacting particulate materials
US4184827A (en) * 1975-12-16 1980-01-22 General Electric Company Apparatus for monitoring and controlling the operation of a dual platen press
DE3939956A1 (de) * 1989-12-02 1991-06-06 Fette Wilhelm Gmbh Verfahren und einrichtung zum ueberwachen der presskraefte einer tablettiermaschine
DE4209767C1 (fr) * 1992-03-23 1993-05-06 Mannesmann Ag, 4000 Duesseldorf, De
JPH08155694A (ja) * 1994-11-30 1996-06-18 Yoshitsuka Seiki:Kk 粉末成形プレスにおける金型位置確認方法
DE19717217C2 (de) * 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Verfahren und Vorrichtung zur Herstellung von Preßlingen aus Hartmetall, Keramik, Sintermetall oder dergleichen
JP4144072B2 (ja) * 1998-07-09 2008-09-03 日立金属株式会社 磁性粉体成形装置及び磁性粉体成形方法
JP2975346B1 (ja) * 1998-07-29 1999-11-10 株式会社菊水製作所 粉末圧縮成形機
US6531090B2 (en) * 2000-02-17 2003-03-11 Sumitomo Special Metals Co., Ltd. Method for producing powder compact and method for manufacturing magnet
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
AU2002219865A1 (en) * 2000-11-14 2002-05-27 Materials Innovation Inc. Hydraulic modular manufacturing system
DE10142772C2 (de) * 2001-08-31 2003-09-25 Fette Wilhelm Gmbh Verfahren zur Herstellung von Pressteilen in einer Pulverpresse
US7150617B1 (en) * 2003-11-17 2006-12-19 The United States Of America As Represented By The Secretary Of The Navy Multiple position press

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101586A1 (de) 2015-02-04 2016-08-04 Fette Compacting Gmbh Pulverpresse zur Herstellung von Presslingen aus pulverförmigem Pressmaterial
EP3053736A1 (fr) 2015-02-04 2016-08-10 Fette Compacting GmbH Presse a poudre destinee a fabriquer des pieces pressees en materiau pulverulents
DE102015101586B4 (de) 2015-02-04 2019-02-21 Fette Compacting Gmbh Pulverpresse zur Herstellung von Presslingen aus pulverförmigem Pressmaterial

Also Published As

Publication number Publication date
DE102004008322A1 (de) 2005-09-08
EP1566231A3 (fr) 2007-01-03
US7351048B2 (en) 2008-04-01
US20050186300A1 (en) 2005-08-25
ATE480351T1 (de) 2010-09-15
EP1566231A2 (fr) 2005-08-24
DE102004008322B4 (de) 2008-11-27
DE502005010195D1 (de) 2010-10-21

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