EP1764173B1 - Dispositif pour mouler de la poudre par pression - Google Patents

Dispositif pour mouler de la poudre par pression Download PDF

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Publication number
EP1764173B1
EP1764173B1 EP06013880A EP06013880A EP1764173B1 EP 1764173 B1 EP1764173 B1 EP 1764173B1 EP 06013880 A EP06013880 A EP 06013880A EP 06013880 A EP06013880 A EP 06013880A EP 1764173 B1 EP1764173 B1 EP 1764173B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
tool
powder
rods
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.)
Active
Application number
EP06013880A
Other languages
German (de)
English (en)
Other versions
EP1764173A3 (fr
EP1764173A2 (fr
Inventor
Walter Solty
Bernd Horn
Guido Schrömges
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.)
SMS Group GmbH
Original Assignee
SMS Meer 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 SMS Meer GmbH filed Critical SMS Meer GmbH
Publication of EP1764173A2 publication Critical patent/EP1764173A2/fr
Publication of EP1764173A3 publication Critical patent/EP1764173A3/fr
Application granted granted Critical
Publication of EP1764173B1 publication Critical patent/EP1764173B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1471—Guiding means other than in the end cap

Definitions

  • the invention relates to a device for producing a molded part from powder, in particular from metal powder, from a dough containing a powdery material, from a powder containing flowable material or from pre-pressed material comprising a tool having the features specified in the preamble of the independent claim having.
  • a generic device is from the US-A-5,498,147 or JP-A-016795 known.
  • a tool is described which has a plurality of concentric piston-cylinder units inserted into each other.
  • laterally arranged guide columns are provided, which pass through a cover plate of the tool.
  • Devices of this type are used to produce molded parts of metal powder by pressing and subsequent sintering.
  • stamp-like tools are used for the pressing of powdery material, which compress the powder introduced into a die by an axial pressing movement.
  • At least one press die is inserted, which penetrates into the die.
  • the die has a cavity which is open to the punch side.
  • the die opening is closed - except for a slight play - by the stamp.
  • the stamp builds up by its penetration into the Matrizenhohlraum necessary for compression pressure.
  • a plurality of punches are used, which can move in an axial direction.
  • the punches can dive into an axially closed on one side mold or come in an axially open in both directions die from both axial directions. Occasionally, through mandrel rods are used, but primarily have no compression function, but a positive displacement function.
  • the punches can also dip laterally into the die to create undercuts or other geometric shapes. To demould the molded part, these radially dipping punch are withdrawn so far that the demolding is not hindered.
  • piston-cylinder systems For positioning of the individual stamps, these are connected to piston-cylinder systems or they are part of these systems. In this case, a number of pistons are arranged concentrically with each other. During pressing, they are moved in accordance with the contour of the molded part to be generated by a defined displacement relative to its cylinder.
  • the individual piston-like stamps are guided in their cylinders characterized in that the piston rests with its radially outwardly facing cylindrical surface in the corresponding bore of the cylinder. It has been found, especially in the production of asymmetrical moldings, that tilting moments, the axis of which are perpendicular to the central axis of the tool, can cause problems. The existing leadership of the pistons in their cylinders is then no longer sufficient for a high-quality production. In addition, problems can arise if the rotationally symmetrical pistons in the cylinders can rotate uncontrolled about the central axis. The known structural elements are then no longer sufficient to ensure a sufficiently accurate guidance of the pistons in their cylinders.
  • the invention is therefore the object of a device of the type mentioned in such a way that the disadvantages mentioned are avoided. It should thus be ensured that even with off-center forces sufficient guidance of the piston is maintained in their cylinders and that a rotation of the piston to its cylinder about the central axis is not possible.
  • the individual pistons of the tool are guided improved in an advantageous manner, which is particularly their parallelism.
  • the directional stability of the pistons is also improved.
  • a plurality of rods are arranged on the piston or on the cylinder;
  • four rods are used, which are arranged on the piston or on the cylinder.
  • These four rods can be arranged symmetrically to two mutually perpendicular planes.
  • a number of piston-cylinder systems are arranged along the central axis.
  • the pistons can be arranged concentrically with each other and at least two pistons may be adjacent to each other on facing lateral surfaces.
  • the guide means can also guide a plurality of pistons and / or cylinders relative to one another.
  • the guide rods are quick and easy to assemble and disassemble, as well as the sockets on the respective piston.
  • the overall quality of the molded part is improved because the tool is provided with precisely working parts.
  • a device 1 for producing a molded part is shown, with the metal powder 12 can be pressed into a molded part.
  • the invention is not only suitable for the processing of powder. Frequently, an already preformed compact is re-pressed in a further step, especially in the final pressing at higher pressures.
  • the device 1 consists essentially of a tool 2, which can be used in a pressing device 3.
  • the pressing device 3 has a machine frame 13 with an upper cross member 14 and a lower cross member 15.
  • an upper piston 16 is arranged in a cylinder, with which a pressing force can be applied downward.
  • the lower cross member 15 carries a lower piston 17, with which a pressing force can be generated upwards.
  • the tool 2 has a die 18, which receives the powder 12.
  • a number of stamp pistons 5 arranged concentrically with one another are provided, which are arranged in respective cylinders 4 and can be moved or controlled relative thereto.
  • a piston-cylinder system Depending on a piston 5 forms together with this receiving cylinder 4, a piston-cylinder system, as it is already known as such. All pistons 5 and cylinders 4 are arranged concentrically around a central axis 6 in the exemplary embodiment.
  • actuating the respective piston-cylinder systems 4, 5 By actuating the respective piston-cylinder systems 4, 5, a movement in the direction of travel V (corresponds to the present case the vertical direction) can be accomplished. Only mentioned in passing were stamp 19 and 20, which are actuated by the upper piston 16, and a filler 21 for the feed of the die 18 with powder 12th
  • a guide means 7 which prevents tilting and excludes twisting.
  • a plate-shaped support member 11 is fixed to the piston 5, to which in turn four rods 9 are fixedly arranged with a circular cross-section.
  • the rods 9 are arranged displaceably in guides 10 in the cylinder 4 in the direction of travel V.
  • the guides can be designed as tightly tolerated sliding bushes, which ensure that during the displacement of the piston 5 relative to the cylinder 4 in the direction of travel V, a high degree of parallelism of both elements 4, 5 is maintained.
  • tilting moments M which act perpendicular to the direction of travel V, should have no influence on the parallelism between piston 5 and cylinder 4.
  • the rods 9 are positioned so that their axis 8 is at a (radial) distance a from the central axis 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Press Drives And Press Lines (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Glass Compositions (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Claims (3)

  1. Dispositif (1) pour fabriquer une pièce moulée à base de poudre, en particulier de poudre de métal, à base d'un matériau pâteux et contenant une poudre, à base d'un matériau fluide et contenant une poudre ou à base de matériau pré-comprimé, qui présente un outil (2), sur lequel une force de pression est exercée par un dispositif de compression (3) lors de la fabrication de la pièce moulée, l'outil (2) pour générer un contour partiel de forme souhaité présentant au moins un système de piston-cylindre (4, 5) avec un axe central (6), qui a un piston (5) pouvant être déplacé de façon hydraulique par rapport à un cylindre (4) dans un sens de déplacement (V) et un moyen de guidage (7), qui guide au moins le piston (5) par rapport au cylindre (4) dans le sens de déplacement (V) du système de piston-cylindre (4, 5), le moyen de guidage (7) s'étendant dans le sens de déplacement (V) le long d'un axe (8) qui est disposé à distance (a) de l'axe central (6) et présente au moins une barre (9), qui est disposée de façon fixe sur le piston (5) ou sur le cylindre (4) et qui est guidée dans un guide (10) dans le cylindre (4) ou dans le piston (5), l'outil (2) étant conçu sous forme d'adaptateur amovible dans le dispositif de compression (3),
    caractérisé en ce que
    la barre (9) est fixée sur un élément support (11) qui est fixé sur le piston (5) ou sur le cylindre (4).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    plusieurs barres (9) sont disposées sur le piston (5) ou sur le cylindre (4).
  3. Dispositif selon la revendication 2,
    caractérisé en ce que
    quatre barres (9) sont disposées sur le piston (5) ou sur le cylindre (4).
EP06013880A 2005-09-20 2006-07-04 Dispositif pour mouler de la poudre par pression Active EP1764173B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005044759A DE102005044759B4 (de) 2005-09-20 2005-09-20 Vorrichtung zum Herstellen eines Formteils

Publications (3)

Publication Number Publication Date
EP1764173A2 EP1764173A2 (fr) 2007-03-21
EP1764173A3 EP1764173A3 (fr) 2008-07-02
EP1764173B1 true EP1764173B1 (fr) 2010-09-22

Family

ID=37672200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06013880A Active EP1764173B1 (fr) 2005-09-20 2006-07-04 Dispositif pour mouler de la poudre par pression

Country Status (5)

Country Link
US (1) US20070062248A1 (fr)
EP (1) EP1764173B1 (fr)
JP (1) JP2007083308A (fr)
AT (1) ATE482041T1 (fr)
DE (2) DE102005044759B4 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014003726A1 (de) * 2014-03-18 2015-09-24 Gkn Sinter Metals Engineering Gmbh Presse zum Herstellen maßhaltiger Grünlinge und Verfahren zum Herstellen
DE102015201784A1 (de) * 2015-02-02 2016-08-04 Gkn Sinter Metals Engineering Gmbh Gestaltoptimierte PM - Werkzeugkomponenten unter Verwendung von Verbindungstechnologie
DE102015201785A1 (de) * 2015-02-02 2016-08-04 Gkn Sinter Metals Engineering Gmbh Pulverpresse mit kegeligem Unterstempel
DE102015201966A1 (de) 2015-02-04 2016-08-04 Gkn Sinter Metals Engineering Gmbh Pulverpresse mit kegeligem Unterbau
DE102017114455B3 (de) * 2017-06-29 2018-10-31 Gkn Sinter Metals Engineering Gmbh Ebenenplatte eines Pressenwerkzeugs
EP3530448B1 (fr) 2018-02-26 2023-06-21 Osterwalder AG Dispositif de presse pour une presse à poudre et un système de changement d'outil
CN108637244A (zh) * 2018-04-12 2018-10-12 海宁金瑞金属制品有限公司 粉末冶金的成型模具
NL2028552B1 (en) * 2021-06-25 2023-01-02 Boschman Tech Bv Component Processing Apparatus and Method Allowing to Selectively Apply Force to a Component Processed

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499980A (en) * 1944-01-07 1950-03-07 Stokes Machine Co Press for molding annular stepped articles
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"
DE3909757A1 (de) * 1989-03-23 1990-09-27 Dorst Masch & Anlagen Presse mit einem in die presse einsetzbaren werkzeuggestell
JPH07115233B2 (ja) * 1990-08-10 1995-12-13 株式会社ヨシツカ精機 粉末成形プレス
DE9203546U1 (de) * 1992-03-17 1993-07-22 Komage - Gellner & Co. Maschinenfabrik KG, 54427 Kell Vorrichtung zum Pressen von Formteilen aus einer feinkörnigen Masse
JPH0818158B2 (ja) * 1993-06-29 1996-02-28 株式会社ヨシツカ精機 粉末成形プレス
JP2000015493A (ja) * 1998-06-30 2000-01-18 Aisin Seiki Co Ltd 粉末成形機
JP4714334B2 (ja) * 2000-11-21 2011-06-29 株式会社ヨシツカ精機 粉末成形プレスのパンチ接続構造および接続方法

Also Published As

Publication number Publication date
EP1764173A3 (fr) 2008-07-02
DE102005044759B4 (de) 2007-07-12
JP2007083308A (ja) 2007-04-05
US20070062248A1 (en) 2007-03-22
DE102005044759A1 (de) 2007-04-05
ATE482041T1 (de) 2010-10-15
DE502006007915D1 (de) 2010-11-04
EP1764173A2 (fr) 2007-03-21

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