EP2552623B1 - Procédé et dispositif pour couler un piston destiné à un moteur à combustion interne - Google Patents

Procédé et dispositif pour couler un piston destiné à un moteur à combustion interne Download PDF

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Publication number
EP2552623B1
EP2552623B1 EP11710776.3A EP11710776A EP2552623B1 EP 2552623 B1 EP2552623 B1 EP 2552623B1 EP 11710776 A EP11710776 A EP 11710776A EP 2552623 B1 EP2552623 B1 EP 2552623B1
Authority
EP
European Patent Office
Prior art keywords
piston
region
casting
pin bores
withdrawn
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
EP11710776.3A
Other languages
German (de)
English (en)
Other versions
EP2552623A1 (fr
Inventor
Silvio Stephan
Isabella Sobota
Rolf Pfeifer
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.)
Federal Mogul Nuernberg GmbH
Original Assignee
Federal Mogul Nuernberg 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 Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Publication of EP2552623A1 publication Critical patent/EP2552623A1/fr
Application granted granted Critical
Publication of EP2552623B1 publication Critical patent/EP2552623B1/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
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/101—Permanent cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to a method and an apparatus for casting a piston for an internal combustion engine.
  • the strength of the so-called piston pin bores, in which the piston pin is received for connection to a connecting rod, is of particular importance.
  • the required strength can be achieved in particular by rapid quenching of the casting. According to the current procedure, such quenching takes place only outside the mold, when the entire piston is solidified so far that it can be removed from the so-called mold.
  • the DE 10 2005 027 540 A1 relates to a method for producing a piston for internal combustion engines, wherein the mold is opened before the melt is solidified in the region of a feeder. Subsequently, the piston can be removed and cooled outside the mold.
  • the WO 2008/128153 A1 relates to a device and a method for casting a piston, in which two collapsible mold halves and two cores are present.
  • the invention has for its object to provide a method and apparatus for casting pistons for internal combustion engines, with which the strength can be improved, in particular in the area of the piston pin holes.
  • At least one sleeve provided there is already retracted after an edge-layer solidification in the region of at least one piston pin bore, and this region is cooled by coolant supplied by at least one sleeve (14).
  • the area of the piston pin bores in particular the largely cylindrical inner surface thereof, can be cooled and quenched more quickly than is possible with the current procedure, so that the strength in these areas is advantageously increased.
  • only a certain surface layer solidification must be awaited, which makes it possible to withdraw a quill provided there, without jeopardizing the shape of the piston in this area.
  • a quill is essentially a substantially cylindrical or slightly conical casting core, which effectively keeps the space later provided for the piston pin during casting, and around which the material surrounding the later piston pin bore is thus formed.
  • the notion of the piston pin bore is to emphasize that this need not necessarily be formed by drilling as a procedural approach. Rather, it is usually two substantially cylindrical openings, in which the two ends of a piston pin are received, while therebetween in the installed state, the connecting rod.
  • the material bypassing the piston pin bores can thus be cooled and quenched more quickly by the procedure according to the invention than was hitherto possible, so that a faster and directional solidification is possible, which leads to increased strength.
  • the solidification speed of the piston material is increased, in particular in the area of the piston pin bores, which leads to quenching and increased strength.
  • a directional solidification can be generated.
  • the cooling to a reduced extent can be done by the supply of coolant, in particular compressed air through exactly one quill.
  • Fig. 1 schematically shown in section casting device 20 for a piston 10 has various elements that initially define the outer shape of the piston. This applies to the tool part 22 in the region of the piston crown, the tool parts 24 in the region of the piston skirt and a so-called fixing ring 26 in the region of the underside of the piston.
  • two sleeves 14 are provided in the embodiment shown, which are slightly conical.
  • there is a core 16 which extends into the area above the pin bores 12 and against which the sleeves are located.
  • Fig. 2 is shown after a first boundary layer solidification, which takes place in particular in the piston pin holes 12, at least one sleeve 14, in the embodiment shown, both sleeves 14, retracted to expose the region of the piston pin holes 12 in particular on the inside thereof. According to the invention, a targeted cooling of these inner surfaces takes place subsequently.
  • the preferred approach is to retract the core 16 to expose also the inner surfaces in the area between the piston pin bores that have hitherto been applied to the core 16 and also to effect cooling and quenching, even before the piston as a whole the casting device or mold can be removed from the mold.
  • the cooling of the area between the piston pin bores is effected only by a quill 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (9)

  1. Procédé pour couler un piston (10) destiné à un moteur à combustion interne, dans lequel, après une solidification de la couche marginale dans la zone des alésages d'axe de piston (12), au moins une douille (14) prévue à cet endroit est retirée et la zone d'au moins un alésage d'axe de piston (12) est refroidie par un fluide de refroidissement amené par au moins une douille (14).
  2. Procédé selon la revendication 1,
    caractérisé en ce que le refroidissement s'effectue au moyen d'air comprimé.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que deux douilles (14) sont retirées simultanément et la zone de deux alésages d'axe de piston (12) est refroidie par un fluide de refroidissement amené simultanément par les douilles (14).
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que, après une solidification de la couche marginale dans la zone entre les alésages d'axe de piston (12), au moins un noyau (16) est retiré et la zone entre les alésages d'axe de piston (12) est refroidie, de préférence sur une étendue réduite.
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce qu'un fluide de refroidissement, notamment de l'air, est d'abord amené par deux douilles et ensuite par exactement une douille (14).
  6. Procédé selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce qu'un fluide de refroidissement, notamment de l'air, est d'abord amené par deux douilles et ensuite, après qu'un noyau a été retiré, est simplement amené par exactement une douille (14), le fluide de refroidissement s'écoulant à travers la zone entre les alésages d'axe de piston (12).
  7. Dispositif (20) pour couler des pistons (10) destinés à des moteurs à combustion interne avec au moins une douille (14) qui peut être retirée de la zone d'un alésage d'axe de piston (12) et par laquelle un fluide de refroidissement peut être amené pour refroidir la zone des alésages d'axe de piston (12).
  8. Dispositif selon la revendication 7,
    caractérisé en ce qu'un dispositif d'amenée d'air comprimé est prévu.
  9. Dispositif selon l'une quelconque des revendications 7 ou 8, en outre avec au moins un noyau (16) qui peut être retiré de la zone entre les alésages d'axe de piston (12).
EP11710776.3A 2010-03-26 2011-03-24 Procédé et dispositif pour couler un piston destiné à un moteur à combustion interne Not-in-force EP2552623B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010003346A DE102010003346A1 (de) 2010-03-26 2010-03-26 Verfahren und Vorrichtung zum Gießen eines Kolbens für einen Verbrennungsmotor
PCT/EP2011/054530 WO2011117342A1 (fr) 2010-03-26 2011-03-24 Procédé et dispositif pour couler un piston destiné à un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2552623A1 EP2552623A1 (fr) 2013-02-06
EP2552623B1 true EP2552623B1 (fr) 2017-06-21

Family

ID=44080194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11710776.3A Not-in-force EP2552623B1 (fr) 2010-03-26 2011-03-24 Procédé et dispositif pour couler un piston destiné à un moteur à combustion interne

Country Status (4)

Country Link
US (1) US8720528B2 (fr)
EP (1) EP2552623B1 (fr)
DE (1) DE102010003346A1 (fr)
WO (1) WO2011117342A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010003345B4 (de) * 2010-03-26 2012-02-23 Federal-Mogul Nürnberg GmbH Verfahren und Vorrichtung zum Gießen eines Kolbens für einen Verbrennungsmotor
DE102011086411A1 (de) * 2011-11-15 2013-05-16 Mahle International Gmbh Gießform für einen Kolben
DE102012103884A1 (de) 2012-05-03 2013-11-07 Fritz Winter Eisengiesserei Gmbh & Co. Kg Verfahren zum Gießen eines mit mindestens einer Durchgangsöffnung versehenen Gussteils
US9943905B2 (en) 2014-12-02 2018-04-17 Halliburton Energy Services, Inc. Heat-exchanging mold assemblies for infiltrated downhole tools
CN108453231B (zh) * 2018-02-01 2020-07-24 浙江博德智能科技有限公司 随形控冷模具及其使用方法

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
DE532267C (de) * 1929-03-29 1931-08-26 Theodor Rudolf Pawlikowski Verfahren und Vorrichtung zur Herstellung von Zylinderseelen und Kolben
NL7607080A (nl) * 1976-06-28 1977-12-30 Holec Nv Inrichting voor het afgeven van brandstof aan een verbrandingsmotor.
DE3040125A1 (de) * 1980-10-24 1982-05-27 Audi Nsu Auto Union Ag, 7107 Neckarsulm Kolben fuer hubkolbenmaschinen sowie verfahren zur herstellung des kolbens
GB8518909D0 (en) * 1985-07-26 1985-09-04 Ae Plc Engineering components
JP2001276961A (ja) * 2000-03-30 2001-10-09 Mazda Motor Corp 金属多孔予備成形体及び該成形体を用いた金属複合部材の製造方法
DE10234539B4 (de) * 2002-07-30 2005-02-24 Ks Kolbenschmidt Gmbh Kolben mit einem offen vergossenen Kühlkanal-Ringträger und Verfahren zu seiner Herstellung
DE10359066A1 (de) * 2003-12-16 2005-07-21 Volkswagen Ag Verfahren zur Herstellung von metallischen Gussteilen sowie in diesem Verfahren verwendete Vorrichtung
US20080128946A1 (en) * 2005-02-10 2008-06-05 Boye David J Mold assembly for lightweight pistons
DE102005027540A1 (de) 2005-06-15 2006-12-28 Ks Kolbenschmidt Gmbh Verkürzung der Taktzeit bei der Serienherstellung von Kolben für Brennkraftmaschinen
US20070277952A1 (en) * 2006-05-30 2007-12-06 Vulcan Engineering Company Rapid localized directional solidification of liquid or semi-solid material contained by media mold
DE102006040046A1 (de) * 2006-08-26 2008-02-28 Ks Kolbenschmidt Gmbh Kolben einer Brennkraftmaschine mit unterschiedlichen Größen des Alpha-Mischkristalls
DE102007012846B3 (de) * 2007-03-17 2008-05-08 Ks Kolbenschmidt Gmbh Mehrteiliger Gießkern für einen Kolben
MX2009011070A (es) * 2007-04-13 2009-12-07 Federal Mogul Powertrain Inc Ensamble de molde para piston y metodo para construir un piston con el mismo.
DE102008048761B4 (de) 2008-09-24 2019-03-28 Volkswagen Ag Verfahren zum Gießen eines Gusskörpers, insbesondere Zylinderkurbelgehäuses und Gießvorrichtung zur Durchführung des Verfahrens

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
EP2552623A1 (fr) 2013-02-06
DE102010003346A1 (de) 2011-09-29
WO2011117342A1 (fr) 2011-09-29
US20130092341A1 (en) 2013-04-18
US8720528B2 (en) 2014-05-13

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