WO2013139845A2 - Procédé de fabrication d'un porte-segment refroidi - Google Patents

Procédé de fabrication d'un porte-segment refroidi Download PDF

Info

Publication number
WO2013139845A2
WO2013139845A2 PCT/EP2013/055798 EP2013055798W WO2013139845A2 WO 2013139845 A2 WO2013139845 A2 WO 2013139845A2 EP 2013055798 W EP2013055798 W EP 2013055798W WO 2013139845 A2 WO2013139845 A2 WO 2013139845A2
Authority
WO
WIPO (PCT)
Prior art keywords
ring carrier
salt
salt core
recess
aluminum
Prior art date
Application number
PCT/EP2013/055798
Other languages
German (de)
English (en)
Other versions
WO2013139845A3 (fr
Inventor
Eberhard Bubeck
Original Assignee
Mahle International 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 Mahle International Gmbh filed Critical Mahle International Gmbh
Publication of WO2013139845A2 publication Critical patent/WO2013139845A2/fr
Publication of WO2013139845A3 publication Critical patent/WO2013139845A3/fr

Links

Classifications

    • 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
    • B22C9/105—Salt cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons
    • B22D19/0027—Cylinders, pistons pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
    • B22D21/04—Casting aluminium or magnesium

Definitions

  • the present invention relates to a method for producing a cooled ring carrier for an aluminum piston to be produced in the casting method according to the preamble of claim 1.
  • the invention also relates to a process for the preparation of such a ring carrier having
  • Aluminum piston and an internal combustion engine with at least one such aluminum piston are provided.
  • From DE 103 25 916 A1 is a generic method for producing a cooled ring carrier for a produced by casting
  • Cooling channel known.
  • salt granules are pressed at a pressure of about 100 to 300 N / mm 2 , so that forms a salt core in the recess.
  • the ring carrier is immersed together with the salt core in an Alfinbad existing of an aluminum melt.
  • Cooling duct piston for an internal combustion engine in which a ring carrier is introduced into a casting mold and surrounded by molten casting during casting. It is envisaged that before flushing in about the same height of the ring carrier coaxial with the ring carrier a flushable core is introduced, which rests after insertion on the ring carrier. As a result, in particular components for the production of the cooling channel should be omitted and the
  • Cooling channel directly adjacent to the ring carrier for optimal cooling The present invention deals with the problem for a
  • the present invention is based on the general idea to form a cooled ring carrier for an aluminum piston to be produced in the casting process with an inwardly open recess, which forms a later cooling channel and to fill this recess with a salt granules. Subsequently, the ring carrier is set in rotation, causing the
  • the composite of ring carrier and solidified salt core is heated to a temperature of about 200 to 250 ° C, whereupon the ring carrier, including solidified salt core is immersed in an Alfinbad existing of an aluminum melt, thereby obtaining an aluminum coating. Due to the aluminum coating produced in Alfinbad can be a solid
  • Aluminum piston can be achieved.
  • a separate solidification of the salt granules to the salt core is no longer necessary, since the solidification takes place here exclusively due to the centrifugal force in the rotation of the ring carrier.
  • Rotational motion is relatively easy to produce, with the rotational speed simply influences the on the salt granules acting pressure and thus its degree of solidification can be taken.
  • a filling of the recess with salt granules takes place several times, interrupted by, for example, individual
  • the ring carrier is set to solidify the filled-in salt granules in rotation, wherein after solidification, the settled volume in the recess by new
  • Salt granules is filled. Subsequently, this salt granulate is compacted by a further rotation.
  • the ring carrier is rotated so fast that a on the
  • Salt granules acting pressure of about 100 to 300 N / mm 2 With such a selected pressure can be ensured that the salt granules is reliably compressed to the later cooling channel forming salt core.
  • a supernatant of the solidified salt core is turned inwards before Alfinieren.
  • a clean conclusion and an exact inner contour of the subsequent cooling channel can be ensured, with such a twisting can be done easily on a specially trained rotary tool, since the solidified salt core can be relatively easily edit.
  • the invention is further based on the general idea to insert such a ring carrier in a mold for an aluminum piston and then pour the mold with a molten aluminum melt.
  • the mold can then be opened and removed from the aluminum flask, wherein to complete the cooling channel of the ring carrier and / or the salt core are drilled and the salt core is then removed by rinsing.
  • the ring carrier according to the invention can thus be refrigerated aluminum piston produced in a simple, economical and with the highest precision manufacturing technology.
  • Fig. 1 is a sectional view through a part of an inventive
  • Fig. 3 shows another possible embodiment of the ring carrier.
  • FIG. 1 an inventively prepared cooled ring carrier 1 for an aluminum piston 2 to be produced in the casting process (see FIG. Fig. 2) of an otherwise not shown internal combustion engine, a later cooling channel 3 forming recess 4.
  • FIG. 1 is the
  • Cooling channel 3 is still filled by means of a salt core 5.
  • the recess 4 is inwardly, i. formed open to an axis 6 of the ring carrier 1 and the later piston 2 out.
  • the ring carrier 1 according to the invention is produced by a process according to the invention, which is in
  • step 1 b the ring carrier 1 is rotated about the axis 6, whereby the salt granules due to the force acting on this centrifugal force or due to this on this
  • cooling channel-forming medium that is, for example, a salt-like medium forming the later salt core 5
  • the ring carrier 1 together with solidified salt core 5 is heated to a temperature of about 200 to 250 ° C. in order then to be completely immersed in process step 1d in an aluminum bath 10 consisting of an aluminum melt.
  • the ring carrier 1 is thereby rotated so fast for compressing the salt granules that a pressure acting on the salt granules pressure is about 100 to 300 N / mm 2 and thereby a reliable production of the salt core 5 can be ensured.
  • a pressure acting on the salt granules pressure is about 100 to 300 N / mm 2 and thereby a reliable production of the salt core 5 can be ensured.
  • a supernatant of the solidified salt core 5 are turned off inside, so that it has a smooth cylindrical inner surface 7.
  • the ring carrier 1 can generally be produced from a cast iron alloy with a nickel content.
  • the ring carrier 1 produced according to the method according to the invention is placed together with the salt core 5 solidified therein in a non-illustrated mold for the aluminum piston 2, said mold is then poured with a molten aluminum melt. After a certain time, i. especially after cooling, the mold can be opened and the
  • Aluminum bulb 2 are removed, wherein then the ring carrier 1 and / or the salt core 5 are drilled to then remove the salt core 5 by rinsing and the cavity now left by the salt core 5, i. the cooling channel 3 to produce. About the drilling of the
  • Ring carrier 1 and the salt core 5 is not only a removal of the salt core 5 by rinsing possible, but it is also an inlet and a drain for the subsequent cooling channel 3 created by which coolant, in particular oil, the cooling channel 3 and fed this can be dissipated again.
  • the annular carrier 1 produced according to the invention also has two undercuts in the region of the recess 4 forming the cooling channel 3 1 1, 1 1 ', which in particular contribute to the strength of the ring carrier back
  • the introduction of the cooling channel-forming medium, such as a salt-like medium, should also be done via a nozzle 12 by means of spraying, which allows a temporal timing and at the same time a quantitative dosage.
  • a transition 8 between flank and inner surface 7 is at
  • Ring carrier 1 according to the invention preferably designed with a large radius, whereby a significantly reduced tendency to crack can be achieved.
  • the inwardly open recess 4 can be avoided in particular hitherto occurring at a lower outer corner region 9 cracks, at the same time the production of the salt core 5 and thus indirectly also the production of the aluminum piston 2 is technically simple and inexpensive possible at the same time high quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un porte-segment refroidi (1) qui est destiné à un piston en aluminium (2) devant être produit par un procédé de coulée pour un moteur à combustion interne, et qui comporte un évidement (4) formant ultérieurement un canal de refroidissement (3). Ledit procédé comprend les étapes suivantes : a.) l'évidement (4) est ouvert vers l'intérieur et est rempli de granulés de sel ; (b.) le porte-segment (1) est amené en rotation, en conséquence de quoi les granulés de sel s'agglomèrent en un noyau de sel (5) formant le canal de refroidissement (3) sous l'effet de la force centrifuge à laquelle ils sont soumis ; (c.) le porte-segment (1) muni du noyau de sel aggloméré (5) est chauffé à une température d'environ 200 à 250 °C ; (d.) le porte-segment (1) muni du noyau de sel aggloméré (5) est plongé dans un bain Al-fin (10) composé d'aluminium fondu. Le procédé permet ainsi de produire à moindre coût des pistons en aluminium (2) d'un haut niveau de qualité.
PCT/EP2013/055798 2012-03-21 2013-03-20 Procédé de fabrication d'un porte-segment refroidi WO2013139845A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012204480.9 2012-03-21
DE102012204480A DE102012204480A1 (de) 2012-03-21 2012-03-21 Verfahren zur Herstellung eines gekühlten Ringträgers

Publications (2)

Publication Number Publication Date
WO2013139845A2 true WO2013139845A2 (fr) 2013-09-26
WO2013139845A3 WO2013139845A3 (fr) 2013-12-05

Family

ID=48227162

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/055798 WO2013139845A2 (fr) 2012-03-21 2013-03-20 Procédé de fabrication d'un porte-segment refroidi

Country Status (2)

Country Link
DE (1) DE102012204480A1 (fr)
WO (1) WO2013139845A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114042884A (zh) * 2021-10-27 2022-02-15 新兴铸管股份有限公司 球墨铸铁管涂料型芯制作方法
US11355022B2 (en) * 2019-09-13 2022-06-07 Honeywell International Inc. Systems and methods for computing flight controls for vehicle landing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10114404A1 (de) 2001-03-23 2002-10-02 Ks Kolbenschmidt Gmbh Formkörper (Kern) am Ringträger
DE10325916A1 (de) 2002-06-25 2004-02-05 Mahle Gmbh Verfahren zur Herstellung eines gekühlten Ringträgers

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JPS63215363A (ja) * 1987-02-28 1988-09-07 Aisin Seiki Co Ltd 内燃機関用ピストンの製造方法
DE19701085A1 (de) * 1997-01-15 1998-07-16 Kolbenschmidt Ag Verfahren und Anordnung zum Herstellen eines Ringträgerkolbens
AT3210U1 (de) * 1998-12-10 1999-11-25 Avl List Gmbh Kolben für eine brennkraftmaschine
KR20000006623A (ko) * 1999-07-06 2000-02-07 이인호 고압주조용붕괴성코어의제조방법과코어및그코어의추출방법
JP2001071119A (ja) * 1999-09-06 2001-03-21 Mazda Motor Corp 予備成形体並びに該予備成形体の鋳包み方法
KR101004883B1 (ko) * 2002-06-25 2010-12-28 말레 게엠베하 냉각식 링 캐리어 제조 방법
DE10255691A1 (de) * 2002-11-29 2004-06-09 Mahle Gmbh Verfahren zur Herstellung eines gekühlten Ringträgers für einen Aluminiumkolben
DE10325917A1 (de) * 2003-06-07 2005-03-31 Mahle Gmbh Kolben für einen Verbrennungsmotor und Gießverfahren zu dessen Herstellung
DE102005061074A1 (de) * 2005-12-21 2007-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102006031086A1 (de) * 2006-07-05 2008-01-10 Ks Kolbenschmidt Gmbh Ringträger-Kühlkanalverbund
DE102008031863A1 (de) * 2008-07-05 2010-01-07 Mahle International Gmbh Einlegeteil für einen Kolben eines Verbrennungsmotors sowie mit dem Einlegeteil versehener Kolben oder Kolbenkopf
CN102159342A (zh) * 2008-07-18 2011-08-17 陶瓷技术有限责任公司 基于盐的型芯及其制备方法
DE102010051356B4 (de) * 2010-11-13 2019-02-21 Volkswagen Ag Verfahren zur Herstellung eines Einlegeteils für die Erzeugung eines Hohlraums in einem Gussbauteil sowie Einlegeteil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10114404A1 (de) 2001-03-23 2002-10-02 Ks Kolbenschmidt Gmbh Formkörper (Kern) am Ringträger
DE10325916A1 (de) 2002-06-25 2004-02-05 Mahle Gmbh Verfahren zur Herstellung eines gekühlten Ringträgers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11355022B2 (en) * 2019-09-13 2022-06-07 Honeywell International Inc. Systems and methods for computing flight controls for vehicle landing
US11900823B2 (en) 2019-09-13 2024-02-13 Honeywell International Inc. Systems and methods for computing flight controls for vehicle landing
CN114042884A (zh) * 2021-10-27 2022-02-15 新兴铸管股份有限公司 球墨铸铁管涂料型芯制作方法
CN114042884B (zh) * 2021-10-27 2023-08-22 新兴铸管股份有限公司 球墨铸铁管涂料型芯制作方法

Also Published As

Publication number Publication date
WO2013139845A3 (fr) 2013-12-05
DE102012204480A1 (de) 2013-09-26

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