EP0034330A2 - Procédé de fabrication d'éléments de construction par la métallurgie des poudres - Google Patents

Procédé de fabrication d'éléments de construction par la métallurgie des poudres Download PDF

Info

Publication number
EP0034330A2
EP0034330A2 EP81100941A EP81100941A EP0034330A2 EP 0034330 A2 EP0034330 A2 EP 0034330A2 EP 81100941 A EP81100941 A EP 81100941A EP 81100941 A EP81100941 A EP 81100941A EP 0034330 A2 EP0034330 A2 EP 0034330A2
Authority
EP
European Patent Office
Prior art keywords
cores
capsule
core
metal powder
powder
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.)
Withdrawn
Application number
EP81100941A
Other languages
German (de)
English (en)
Other versions
EP0034330A3 (fr
Inventor
Wolfgang Dr.-Ing. Betz
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.)
MTU Aero Engines AG
Original Assignee
MTU Motoren und Turbinen Union Muenchen 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 MTU Motoren und Turbinen Union Muenchen GmbH filed Critical MTU Motoren und Turbinen Union Muenchen GmbH
Publication of EP0034330A2 publication Critical patent/EP0034330A2/fr
Publication of EP0034330A3 publication Critical patent/EP0034330A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for heat-exchange media
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B22F2005/103—Cavity made by removal of insert
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/18—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes sintered

Definitions

  • the invention relates to a method for the powder metallurgical production of components with intricate, especially undercut cavities or outer surfaces.
  • the object of the invention is to demonstrate a new method which enables such components to be manufactured economically for series production.
  • cores 2 in the form of parallel rods are used in a capsule 1, preferably made of sheet steel, the interior of which corresponds to the outer surface of the desired component 3 plus - corresponding to the expected shrinkage of the filled capsule - approximately 10 to 20% oversize through known facilities, e.g. B. grid made of steel wire, held in the desired position.
  • these rods are arranged in several layers, namely in layers approximately perpendicular to one another.
  • the arrangement of the straight bars 2 in several layers is illustrated by the inclined image according to FIG. Fig. Lb shows a plan view of bars perpendicular to each other in layers, but these bars are each bent at right angles.
  • the cores are made of ceramic or steel. The core shape corresponds to the desired cavities of the component 3 to be produced.
  • the capsule After inserting the rod-shaped cores according to FIG. 1, the capsule is completely filled with metal powder and compacted by shaking, whereupon it is evacuated and sealed vacuum-tight. The contents of the capsule are then sintered or hot isostatically pressed. Finally, the capsule is removed until the core ends are exposed, whereupon the cores are mechanically worked out and / or chemically released.
  • the component in the example of the cross-flow heat exchanger, is now complete along with its entangled cavities.
  • cores 12 made of ceramic or steel are used so that the desired entangled, z. B. undercut outer surface of the component is shown.
  • the cylinder is then completely filled with metal powder and shaken to the desired density, after which it is evacuated and sealed in a vacuum-tight manner. Then the cylinder content is sintered again or hot isostatically pressed. Finally, the cylinder is removed until the core ends are exposed, whereupon the cores are mechanically worked out and / or chemically released. The component and its entangled outer surface are finished.
  • Cores according to FIG. 3 or FIG. 4 are used for the production of hollow components with material webs arranged inside. These have essentially the shape of plates 20, 20a, which are provided with openings 21, 22. These cores are placed crosswise one on top of the other, leaving a space between two plates arranged one above the other. The metal powder introduced into the capsule then fills the spaces between the plates 20, 20a arranged one above the other and the openings 21, 22. After the core material has been removed A component 30 then results, as shown in FIG. 3a. This component has a plate-shaped supporting wall and material webs. If not only two but several plate-shaped cores with openings are used, a component with a row of load-bearing partitions and a plurality of nub-like material webs connecting them results.
  • the openings of the plate-shaped core 30 according to FIG. 4 have a lens shape.
  • cores made of Al 2 0 3 are used, which are then dissolved out with alkali lyes. It is also advantageous to use steel cores instead of ceramic cores, since the risk of breakage when shaking the capsule is lower in steel cores than in ceramic cores. If ceramic cores are used, acids can be used as solvents for removing the core material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
EP81100941A 1980-02-14 1981-02-11 Procédé de fabrication d'éléments de construction par la métallurgie des poudres Withdrawn EP0034330A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3005474A DE3005474C2 (de) 1980-02-14 1980-02-14 Verfahren zur pulvermetallurgischen Herstellung von einstückigen Bauteilen mit verwickelten Hohlräumen
DE3005474 1980-02-14

Publications (2)

Publication Number Publication Date
EP0034330A2 true EP0034330A2 (fr) 1981-08-26
EP0034330A3 EP0034330A3 (fr) 1981-12-16

Family

ID=6094567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100941A Withdrawn EP0034330A3 (fr) 1980-02-14 1981-02-11 Procédé de fabrication d'éléments de construction par la métallurgie des poudres

Country Status (3)

Country Link
EP (1) EP0034330A3 (fr)
JP (1) JPS56127703A (fr)
DE (1) DE3005474C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356745A1 (fr) * 1988-08-20 1990-03-07 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Dispositif d'échange de chaleur
EP1172165A1 (fr) * 2000-07-15 2002-01-16 Schott Glas Procédé de construction de canaux de refroidissement dans des dispositifs de moulage soumis à des contraintes thermiques et dispositifs de moulage ainsi obtenus
CN105798296A (zh) * 2016-03-23 2016-07-27 上海工程技术大学 一种3d打印碳化硼/铝复合材料异形零件的制备方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE456322B (sv) * 1986-03-04 1988-09-26 Asea Stal Ab Sett vid tillverkning av metallprodukter genom hetisostatpressning av pulver med anvendande av kernor
US4861546A (en) * 1987-12-23 1989-08-29 Precision Castparts Corp. Method of forming a metal article from powdered metal
CH677488A5 (fr) * 1989-02-14 1991-05-31 Htm Ag
JP3332081B2 (ja) 1999-09-07 2002-10-07 日本ピラー工業株式会社 燃料電池用セパレータの製造金型及び燃料電池用セパレータの製造方法
US8033805B2 (en) * 2007-11-27 2011-10-11 Kennametal Inc. Method and apparatus for cross-passageway pressing to produce cutting inserts
JP2016017218A (ja) * 2014-07-10 2016-02-01 株式会社Ihi 中空構造体の製造方法
GB2620549A (en) * 2022-06-27 2024-01-17 The Manufacturing Tech Centre Limited A method for creating an object

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571068A (en) * 1922-08-07 1926-01-26 Stancliffe Engineering Corp Heat interchanger
DE549713C (de) * 1930-01-07 1932-04-30 Fried Krupp Akt Ges Verfahren zur Herstellung von Hohlkoerpern aus Hartmetallegierungen
US2695230A (en) * 1949-01-10 1954-11-23 Michigan Powdered Metal Produc Process of making powdered metal article
GB766668A (en) * 1954-03-05 1957-01-23 Atomic Energy Authority Uk Improvements in or relating to heat exchangers
DE1533013A1 (de) * 1966-05-14 1969-12-04 Iit Res Inst Verfahren zur Herstellung einer Waermeuebertragungsvorrichtung
SE332316B (fr) * 1968-01-16 1971-02-01 A Badine
SE350918B (fr) * 1971-03-26 1972-11-13 Asea Ab
US3823463A (en) * 1972-07-13 1974-07-16 Federal Mogul Corp Metal powder extrusion process
GB1468889A (en) * 1973-04-12 1977-03-30 Crucible Inc Method and assembly for use in making powder metallurgy articles having internal passages
US3992202A (en) * 1974-10-11 1976-11-16 Crucible Inc. Method for producing aperture-containing powder-metallurgy article
US3996048A (en) * 1975-10-16 1976-12-07 Avco Corporation Method of producing holes in powder metallurgy parts
DE2717886A1 (de) * 1976-04-23 1977-11-03 Powdrex Ltd Verfahren zur herstellung eines metallkoerpers sowie dabei auftretendes zwischenprodukt
NL7605725A (nl) * 1976-05-28 1977-11-30 Skf Ind Trading & Dev Werkwijze voor het vervaardigen van een van ruimten voorzien voorwerp uit metaalpoeder, alsmede gesinterd voorwerp vervaardigd volgens de werkwijze.
JPS5499710A (en) * 1978-01-24 1979-08-06 Kobe Steel Ltd Manufacture of raw material of drill with oil hole

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356745A1 (fr) * 1988-08-20 1990-03-07 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Dispositif d'échange de chaleur
EP0467426A3 (en) * 1988-08-20 1992-03-11 Schwaebische Huettenwerke Gesellschaft Mit Beschraenkter Haftung Heat exchange apparatus
EP1172165A1 (fr) * 2000-07-15 2002-01-16 Schott Glas Procédé de construction de canaux de refroidissement dans des dispositifs de moulage soumis à des contraintes thermiques et dispositifs de moulage ainsi obtenus
CN105798296A (zh) * 2016-03-23 2016-07-27 上海工程技术大学 一种3d打印碳化硼/铝复合材料异形零件的制备方法

Also Published As

Publication number Publication date
JPS56127703A (en) 1981-10-06
DE3005474C2 (de) 1982-11-11
DE3005474A1 (de) 1981-08-20
EP0034330A3 (fr) 1981-12-16

Similar Documents

Publication Publication Date Title
EP1358855B1 (fr) Procédé pour la production d'objets par formage de formes libres lors d'un procédé de frittage au laser
DE3013943C2 (fr)
DE60034138T2 (de) Mehrteilige kernanordnung für gegossene turbinenschaufel
DE2937452C2 (de) Verfahren zum Herstellen einer Schalenform mit verlorenem Modell zum Herstellen von Einkristall-Gußstücken
EP0034330A2 (fr) Procédé de fabrication d'éléments de construction par la métallurgie des poudres
EP0312699B1 (fr) Fabrication de prothèses dentaires comme des couronnes ou des ponts par méthode d'étincelage
DE19882877B4 (de) Verfahren zur Bearbeitung einer Oberfläche eines Werkstücks durch Entladung sowie Grünlingelektrode
EP1484031B1 (fr) Procédé et dispositif pour la production d'une structure dentaire en céramique
DE60000104T2 (de) Kakaopresse
DE68912112T2 (de) Verfahren zur herstellung eines nietnagels, beziehungsweise eines umhüllten nietnagels und vorrichtung zur durchführung des verfahrens.
DE1164527B (de) Verfahren zur Herstellung einer Thermo- bzw. Peltiersaeule
DE69313976T2 (de) Verfahren und Sinterungsmitteln für Ferritsektoren
DD156227A5 (de) Verfahren zur pulvermetallurgischen herstellung von bauteilen
DE3045638A1 (de) Verfahren und formvorrichtung zum herstellen von zahnradgetrieben mit zahnradpaaren
DE1173618B (de) Verfahren zur Herstellung von Giesserei-Hohlkernen aus schnell haertenden Sanden sowie Kernformeinrichtung zur Durchfuehrung des Verfahrens
DE4029651C2 (fr)
DE3726259C1 (de) Verfahren zur Herstellung von Bauteilen aus metallischem oder nichtmetallischem Pulver
EP0057943B1 (fr) Procédé pour la fabrication d'une plaque creuse en béton utilisée comme échangeur de chaleur
DE94004C (fr)
DE240880C (fr)
DE202374C (fr)
AT93335B (de) Verfahren zur Herstellung von Baublöcken aus Beton od. dgl.
DE294806C (fr)
DE1514104C3 (de) Verfahren und Vorrichtung zur Herstellung von Brenn- und/oder Brutelementen für Kernreaktoren
DE2048224C3 (de) Verfahren zum Herstellen einer Vorratskathode

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT SE

17P Request for examination filed

Effective date: 19820119

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19830824

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BETZ, WOLFGANG, DR.-ING.