EP1287976B1 - Presse hydraulique pour la compression de poudre métallique - Google Patents

Presse hydraulique pour la compression de poudre métallique Download PDF

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Publication number
EP1287976B1
EP1287976B1 EP02017181A EP02017181A EP1287976B1 EP 1287976 B1 EP1287976 B1 EP 1287976B1 EP 02017181 A EP02017181 A EP 02017181A EP 02017181 A EP02017181 A EP 02017181A EP 1287976 B1 EP1287976 B1 EP 1287976B1
Authority
EP
European Patent Office
Prior art keywords
force
guide plate
upper ram
pressure generator
generator
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
EP02017181A
Other languages
German (de)
English (en)
Other versions
EP1287976A2 (fr
EP1287976A3 (fr
Inventor
Jürgen Hinzpeter
Ulrich Zeuschner
Ingo Schmidt
Thomas Pannewitz
Udo Baltruschat
Thorsten Ehrich
Ulf Hauschild
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7697313&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1287976(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fette GmbH filed Critical Fette GmbH
Publication of EP1287976A2 publication Critical patent/EP1287976A2/fr
Publication of EP1287976A3 publication Critical patent/EP1287976A3/fr
Application granted granted Critical
Publication of EP1287976B1 publication Critical patent/EP1287976B1/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
    • 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
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/32—Discharging presses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/058—Undercut

Definitions

  • the invention relates to a press for pressing metal powder or the like into compacts according to claim 1.
  • the compacts are formed from metal powder.
  • For pressing the metal powder is an eccentric or a hydraulic press.
  • the invention relates to a hydraulic powder press.
  • the press cylinders are reversed and, in particular, the upper punch is moved out of the die bore so that the pressed body can be ejected with the aid of the lower punch.
  • the invention has for its object to provide a hydraulic press for pressing metal powder or the like to compacts, in which a controlled springing of the compact is made possible.
  • the force generator acts on the upper punch via a first force measuring device.
  • the separate pressure generator acts on the upper punch via a second force measuring device.
  • a control can be set up to regulate the course of the ballast on the upper punch according to predetermined values.
  • the pressure generator is preferably a double-acting pneumatic cylinder. A double action of the pneumatic cylinder is desired, so that this can compensate for the weight of the upper punch in whole or in part.
  • the invention provides that the first force measuring device measures the force on the upper punch and initiates the application of the ballast when it falls below a predetermined value.
  • the ballast may be initiated when a suitable path measuring device determines that the punch has reached a predetermined position. Distance measuring devices in such presses are known per se.
  • the press according to the invention has the advantage that a controlled load on the compact acts, so that cracks on the compact are effectively prevented.
  • the ballast can be shut down slowly with the aid of the invention.
  • the advantage is given that depending on the material and geometry of the compact a predetermined load can be adjusted.
  • the advantage is obtained that with the invention, the forces acting on the compact after the pressing process can be documented.
  • an embodiment of the invention provides that the upper press cylinder acts on the upper punch via a first and a second guide plate, between which pressure columns are arranged, wherein the pressure columns are mounted on the second guide plate so that they are on the second during the Presshubes Support guide plate and raise in a return stroke to take the second guide plate a limited distance from the second guide plate.
  • a die plate is shown with a die bore 12, which are associated with a lower punch 14 and a punch 16.
  • an upper hydraulic press cylinder is indicated, which operates a press ram 20.
  • an arrangement 22 is provided with the targeted a load on the upper punch 16 can be applied when the press ram 20 after reaching the end position or the maximum Force is switched to return stroke.
  • the compact 24 springs in the die bore 12 and thus follows the upper punch 16. This results in a characteristic curve in the force travel diagram according to FIG. 2, which is identified by 26. If no further measures are taken, the characteristic curve 26 continues via the dashed branch 28 up to the force zero.
  • Fig. 3 is a possible structural design of the press shown in FIG. 1. It will be the same parts as in Fig. 1 provided with the same reference numerals.
  • guide columns 32, 34 are arranged on the die plate 10 . They carry a plate assembly 36 having a lower plate 38 and an upper plate 40. The plate assembly 36 forms a lower guide plate. The upper punch 16 is connected via an unspecified component 42 with the plate 38.
  • An upper plate 44 is connected via a punch 46 and an intermediate plate 48 with the plunger of the press cylinder, not shown.
  • the stamp 46 acts a separate pressure plate 50, which is embedded in a recess of the upper guide plate 44.
  • pressure columns 54, 56 are connected to the underside of the guide plate 44. At the lower end, the pressure columns 54, 56 are supported on bushings 58, 60, which in turn are screwed to the upper side of the plate 50. By bores of the bushes 58, 60 pins 62, 66 are passed and screwed into blind holes at the lower end of the pressure columns 54, 56.
  • the pins 62, 66 have flanges 68, 70 which cooperate with the underside of the bushes 58, 60 when the pins 62, 66 are raised.
  • a pneumatic cylinder 74 With the underside of the upper guide plate 44, a pneumatic cylinder 74 is connected. With the top of the plate 40, a pressure cell 76 is connected. The pneumatic cylinder 74 can exert a pressure on the pressure cell 76, which is transmitted to the plate assembly 36 and thus on the upper punch 16.
  • a pressure is exerted on the intermediate plate 48 according to arrow F by the press cylinder, not shown, which acts directly on the upper punch 16.
  • the upper punch 16 is inserted into the die bore 12 and performs the pressing process in a known manner until a predetermined position has been reached or a predetermined force has been applied. Subsequently, the press cylinder is acted upon in the opposite direction and moved. As soon as the dead center is reached for the press cylinder or the upper punch, or shortly after, the pneumatic cylinder 74 also exerts a force the load cell 76 on the stamp.
  • a return stroke of the upper press cylinder does not immediately lead to entrainment of the upper punch 16, namely until the flanges 68, 70 abut against the underside of the bushes 58, 60.
  • the distance between the flanges 68, 70 and the sockets 58, 60 is about 3 to 4 mm.
  • the force applied to the lower punch by the pneumatic cylinder is maintained or reduced to zero according to a predetermined characteristic, in a manner in which an optimal load on the compact is achieved, in the formation of cracks or the like in each Case be avoided. If the press cylinder has overcome the gap between the flanges 68, 70 and the bushings 58, 60, the upper punch 16 is now raised, and the pneumatic cylinder 74 can then no longer exert any force on the upper punch 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)

Claims (4)

  1. Presse hydraulique pour le compactage de poudre métallique ou similaire pour obtenir des corps pressés, comportant une plaque matrice (10), un poinçon supérieur et au moins un poinçon inférieur (14,16) qui coopèrent avec un alésage (12) de la matrice, un générateur de force (18), actionné par voie hydraulique pour le poinçon supérieur (16), et un générateur de pression (22), actionné par fluide et agencé parallèlement à la trajectoire des forces du générateur de force (18), une distance morte limitée pour la course de retour étant prévue dans la trajectoire des forces entre le générateur de force (18) et le poinçon supérieur (16), distance sur laquelle il ne se produit aucun entraînement du poinçon supérieur (16), et une force de pression étant générée sur le poinçon supérieur (16) sur la distance morte par l'intermédiaire du générateur de pression (22), caractérisée en ce que le générateur de force (18) agit sur le poinçon supérieur (16) par l'intermédiaire d'un dispositif dynamométrique, le générateur de pression (22) agit sur le poinçon supérieur (16) par l'intermédiaire d'un autre dispositif dynamométrique, un dispositif de commande actionne le générateur de pression (22), lorsque la force mesurée par le dispositif dynamométrique est dépassée vers le bas ou lorsque le générateur de force (18) ou le poinçon supérieur (16) a atteint lors de la course de retour une position prédéfinie mesurée par un dispositif de mesure du déplacement, et au moins une courbe de la trajectoire des forces est mémorisée dans le dispositif de commande, le long de laquelle la force du générateur de pression (22) est appliquée sur le poinçon supérieur (16) lorsque celui-ci commence sa course de retour.
  2. Presse hydraulique selon la revendication 1, caractérisée en ce que le générateur de pression est un vérin pneumatique (74) à double effet.
  3. Presse hydraulique selon la revendication 1 ou 2, caractérisée en ce que le cylindre de presse supérieur agit sur le poinçon supérieur (16) par l'intermédiaire d'une première plaque de guidage (44) et d'une deuxième plaque de guidage (36), entre lesquelles sont agencées des colonnes de pression (54, 56), lesdites colonnes de pression (54, 56) étant disposées sur la deuxième plaque de guidage (36) de telle sorte que, pendant la course de pression, elles prennent appui sur la deuxième plaque de guidage (36) et, pendant la course de retour jusqu'à l'entraînement de la deuxième plaque de guidage (36), se relèvent sur une distance limitée par rapport à la deuxième plaque de guidage (36).
  4. Presse hydraulique selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'un vérin pneumatique (74) est agencé sur la face inférieure de la première plaque de guidage (44) et un capteur dynamométrique (76) est agencé sur la face supérieure de la deuxième plaque de guidage (36).
EP02017181A 2001-08-31 2002-07-31 Presse hydraulique pour la compression de poudre métallique Expired - Lifetime EP1287976B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10142773A DE10142773C1 (de) 2001-08-31 2001-08-31 Hydraulische Presse zum Pressen von Metallpulver
DE10142773 2001-08-31

Publications (3)

Publication Number Publication Date
EP1287976A2 EP1287976A2 (fr) 2003-03-05
EP1287976A3 EP1287976A3 (fr) 2004-01-07
EP1287976B1 true EP1287976B1 (fr) 2006-09-13

Family

ID=7697313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02017181A Expired - Lifetime EP1287976B1 (fr) 2001-08-31 2002-07-31 Presse hydraulique pour la compression de poudre métallique

Country Status (4)

Country Link
US (1) US7033155B2 (fr)
EP (1) EP1287976B1 (fr)
AT (1) ATE339299T1 (fr)
DE (2) DE10142773C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2496644C1 (ru) * 2012-03-13 2013-10-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный индустриальный университет" Гидравлический пресс для компактирования порошковых материалов

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0307213A (pt) * 2002-01-25 2005-04-26 Ck Man Ab Máquina de retenção de energia de impacto de forjamento dinâmico
DE102005021923C5 (de) * 2005-05-12 2014-03-13 Fette Compacting Gmbh Verfahren zum Betrieb einer Rundläuferpresse und Rundläuferpresse
DE102005052748A1 (de) * 2005-11-04 2007-05-10 Dorst Technologies Gmbh & Co. Kg Pressenanordnung und Verfahren zum Pressen von Pressteilen
DE102008015765B4 (de) * 2008-03-26 2016-02-11 Holzma Plattenaufteiltechnik Gmbh Plattenaufteilanlage
DE102014117012B4 (de) 2014-11-20 2017-07-13 Fette Compacting Gmbh Verfahren zum Fördern von Presslingen in einer Rundläuferpresse und Rundläuferpresse zum Erzeugen von Presslingen
DE102015117663A1 (de) * 2015-10-16 2017-04-20 Dorst Technologies Gmbh & Co. Kg Keramik- und/oder metallpulver-presswerkzeug, presse bzw. verfahren zum einrichten einer keramik- und/oder metallpulver-presse
CN112959721A (zh) * 2021-02-01 2021-06-15 一重集团大连工程技术有限公司 用于中低放射性固体废物桶内压实处理的初级压缩机

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GB311070A (en) * 1928-04-14 1929-05-09 Fritz Kilian Improvements in the manufacture of compressed cakes
US2569226A (en) * 1946-01-11 1951-09-25 Denison Eng Co Method of producing articles from powdered material
US3890413A (en) * 1974-08-15 1975-06-17 Hydramet American Inc Apparatus and method for compacting particulate materials
US4260346A (en) * 1979-10-09 1981-04-07 Anderson Jr Raymond B Press assembly for powder material
US4946634A (en) * 1987-04-16 1990-08-07 Gte Products Corporation Powder compacting press to control green density distribution in parts
DE3919821C2 (de) * 1989-06-15 1994-04-07 Mannesmann Ag Verfahren und Vorrichtung zum Herstellen von maßhaltigen Preßlingen
JP2889990B2 (ja) * 1990-08-06 1999-05-10 セイコーインスツルメンツ株式会社 粉末成形方法
JP2662913B2 (ja) * 1991-09-17 1997-10-15 ファナック株式会社 圧縮成形機と圧縮成形方法
US5202067A (en) * 1991-11-12 1993-04-13 Chemplex Industries, Inc. Powder compacting press apparatus and methods
JP3558679B2 (ja) * 1994-03-31 2004-08-25 株式会社アマダ 板材加工機におけるラム駆動装置
DE19717217C2 (de) * 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Verfahren und Vorrichtung zur Herstellung von Preßlingen aus Hartmetall, Keramik, Sintermetall oder dergleichen
DE19846210A1 (de) * 1998-10-07 2000-04-13 Dorst Masch & Anlagen Presse zum Herstellen von Formkörpern
DE19854075A1 (de) * 1998-11-24 2000-05-25 Henkel Kgaa Verfahren zur Serienfertigung von Formkörpern mit geringer Härteschwankung
US6432158B1 (en) * 1999-10-25 2002-08-13 Sumitomo Special Metals Co., Ltd. Method and apparatus for producing compact of rare earth alloy powder and rare earth magnet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2496644C1 (ru) * 2012-03-13 2013-10-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный индустриальный университет" Гидравлический пресс для компактирования порошковых материалов

Also Published As

Publication number Publication date
US7033155B2 (en) 2006-04-25
EP1287976A2 (fr) 2003-03-05
EP1287976A3 (fr) 2004-01-07
DE50208119D1 (de) 2006-10-26
ATE339299T1 (de) 2006-10-15
DE10142773C1 (de) 2003-03-06
US20030041749A1 (en) 2003-03-06

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