EP1287976A2 - 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
EP1287976A2
EP1287976A2 EP02017181A EP02017181A EP1287976A2 EP 1287976 A2 EP1287976 A2 EP 1287976A2 EP 02017181 A EP02017181 A EP 02017181A EP 02017181 A EP02017181 A EP 02017181A EP 1287976 A2 EP1287976 A2 EP 1287976A2
Authority
EP
European Patent Office
Prior art keywords
force
hydraulic press
guide plate
pressure generator
upper punch
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
EP02017181A
Other languages
German (de)
English (en)
Other versions
EP1287976A3 (fr
EP1287976B1 (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(A2) "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 hydraulic press for pressing metal powder or the like to pellets according to claim 1.
  • the production of tools for example cutting inserts for milling or Drilling often happens in the sintering process.
  • the compacts are molded from metal powder.
  • 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 hole, so that the compact can be ejected using the lower punch.
  • the invention has for its object a hydraulic press for pressing from metal powder or the like to create compacts in which a controlled Springing of the compact is made possible.
  • the hydraulic press according to the invention is in the force path between the Press cylinder and the upper punch for the return stroke a limited dead path provided in which the upper stamp is not carried. Will the Press cylinder after reaching the maximum pressing force or the specified one Positioned for the upper punch in the opposite direction, he takes the upper stamp a first distance. If no special arrangements would be hit, the pellet would then with the weight of the upper punch be burdened.
  • a separate, a variable Pressure generating pressure generator is provided, which is arranged parallel to the force path and a predetermined pressure force during the mentioned dead path the upper stamp.
  • the compressive force can be along a desired curve be driven towards zero and is, for example, zero at the moment when the upper punch is taken away from the press cylinder on the return stroke.
  • the press according to the invention has the advantage that a controlled load on the The pellet acts so that cracks on the pellet are effectively prevented.
  • the With the help of the invention the load can be lowered slowly.
  • a predetermined load can be set.
  • the separate pressure generator acts via a Force measuring device on the upper punch.
  • a regulation can be built up to the course of the load on the upper punch to regulate according to given values.
  • the pressure generator is preferred a double-acting pneumatic cylinder. A double action of the pneumatic cylinder is desired so that it fully or partially the weight on Can compensate for the upper stamp.
  • a control device for the control during the pressing process and the load One embodiment provides for determining when a ballast pressure must be exerted the invention that a suitable force measuring device the force on The upper stamp measures and, if the value falls below a predetermined value, the application the load initiated. Alternatively, the charge can be initiated if a suitable distance measuring device determines that the upper punch is a predetermined one Has reached position. Displacement measuring devices in such presses are in themselves known.
  • An embodiment provides for this the invention that the upper press cylinder via a first and a second guide plate acts on the upper punch, between which pressure columns are arranged, the pressure columns being attached to the second guide plate that they are on the second guide plate during the press stroke support and on a return stroke until the second guide plate is carried along Raise limited distance from the second guide plate.
  • a die plate is shown at 10 with a die hole 12, the a lower stamp 14 and an upper stamp 16 are assigned.
  • At 18 is an upper one indicated hydraulic press cylinder, which actuates a press ram 20.
  • An arrangement 22 is located between the press ram 20 and the upper punch 18 provided with which a load is applied to the upper punch 16 in a targeted manner can, if the press ram 20 after reaching the end position or the maximum Force is switched to return stroke.
  • the compact 24 springs up in the die bore 12 and consequently follows the upper punch 16.
  • FIG. 3 shows a possible structural design of the press according to FIG. 1.
  • Guide columns 32, 34 are arranged on the die plate 10. You run one Plate assembly 36 with a lower plate 38 and an upper plate 40. Die Plate assembly 36 forms a lower guide plate. The upper stamp 16 is over a component 42, not specified, is connected to the plate 38.
  • An upper plate 44 is connected via a punch 46 and an intermediate plate 48 to the Tappet not shown connected to the press cylinder.
  • the stamp 46 acts a separate pressure plate 50, which in a recess of the upper guide plate 44th is let in.
  • Pins 52, 56 are attached to the underside of the guide plate 44 by means of pins 52 connected.
  • the pressure columns 54, 56 are supported on bushings 58, 60 from, which in turn are screwed to the top of the plate 50.
  • Through holes the sockets 58, 60, pins 62, 66 are passed and in blind bores screwed at the lower end of the pressure columns 54, 56.
  • Have pins 62, 66 Flanges 68, 70 which cooperate with the underside of the bushings 58, 60 when the pins 62, 66 are raised.
  • a pneumatic cylinder 74 is connected to the underside of the upper guide plate 44.
  • a pressure cell 76 is connected to the top of the plate 40.
  • the Pneumatic cylinder 74 can exert pressure on the pressure cell 76 that is on the plate arrangement 36 and thus transferred to the upper punch 16.
  • a press cylinder (not shown) is used Pressure is applied to the intermediate plate 48 according to arrow F, which is immediately on affects the upper stamp 16.
  • the upper punch 16 is in the die bore 12 introduced and performs the pressing process in a known manner until a predetermined Position reached or a predetermined force has been applied. Subsequently the press cylinder is acted on in the opposite direction and moved. As soon as the dead center for the press cylinder or the upper punch is reached, or even shortly thereafter, the pneumatic cylinder 74 also exerts a force the load cell 76 on the stamp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)
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
DE10142773 2001-08-31
DE10142773A DE10142773C1 (de) 2001-08-31 2001-08-31 Hydraulische Presse zum Pressen von Metallpulver

Publications (3)

Publication Number Publication Date
EP1287976A2 true EP1287976A2 (fr) 2003-03-05
EP1287976A3 EP1287976A3 (fr) 2004-01-07
EP1287976B1 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003061868A1 (fr) * 2002-01-25 2003-07-31 Ck Management Ab Machine pour forgeage dynamique à rétention d'énergie d'impact
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
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
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
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 (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
DE10142773C1 (de) 2003-03-06
ATE339299T1 (de) 2006-10-15
EP1287976A3 (fr) 2004-01-07
US7033155B2 (en) 2006-04-25
DE50208119D1 (de) 2006-10-26
EP1287976B1 (fr) 2006-09-13
US20030041749A1 (en) 2003-03-06

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