EP2408578B1 - Méthode de réalisation d'un carter avec tuyauteries rapportées, carter et son utilisation - Google Patents

Méthode de réalisation d'un carter avec tuyauteries rapportées, carter et son utilisation Download PDF

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Publication number
EP2408578B1
EP2408578B1 EP10708559.9A EP10708559A EP2408578B1 EP 2408578 B1 EP2408578 B1 EP 2408578B1 EP 10708559 A EP10708559 A EP 10708559A EP 2408578 B1 EP2408578 B1 EP 2408578B1
Authority
EP
European Patent Office
Prior art keywords
casing
pipe
pipes
casting
producing
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
EP10708559.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2408578A1 (fr
Inventor
Rémi AUGUSTIN
Gérard DEDIEU
Christian Henri Paul Mauhe
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.)
Safran Transmission Systems SAS
Original Assignee
Safran Transmission Systems SAS
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.)
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Publication date
Application filed by Safran Transmission Systems SAS filed Critical Safran Transmission Systems SAS
Publication of EP2408578A1 publication Critical patent/EP2408578A1/fr
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Publication of EP2408578B1 publication Critical patent/EP2408578B1/fr
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Classifications

    • 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
    • B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
    • 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
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
    • 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
    • B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12299—Workpiece mimicking finished stock having nonrectangular or noncircular cross section

Definitions

  • the field of the present invention is that of the manufacture of parts by foundry, and more particularly that of molded parts, aluminum or one of its alloys, which include integrated channels. These channels are generally intended to lead a lubricant or a gaseous fluid to portions disposed within this room.
  • the present invention is particularly applicable to the manufacture of parts such as cylinder heads or housings, such as gearbox housings for aeronautical engines.
  • a mold is made which cleans a cavity, for example by means of a sand core, corresponding to the piping to be produced; this technique has the advantage of being able to make the pipe in the same alloy as the housing and thus to control the subsequent dilations of the housing and thus avoid the appearance of constraints that would come from the use of different materials.
  • the crankcase mold is made by placing sand cores that mimic the inside of the piping to be made and which are positioned where this piping should appear.
  • This technique has the disadvantage that it is necessary to check the pipes after pouring to ensure that the sand has been eliminated at the end of the operation and that there is no longer any grain that can come off in operation, which could cause anomalies in the operation of the mechanisms placed inside the housing.
  • the present invention aims to remedy these drawbacks by proposing a method for producing a light alloy housing which does not have some of the disadvantages of the art previous and which, in particular, leads to a mass-optimized casing dedicated to the realization of its internal pipes.
  • the invention relates to a method of producing a housing according to the features of claim 1.
  • thermal barrier avoids having to predict any extra thicknesses on the pipes, which would be made necessary to withstand the risk of damage during contact with the casting metal of the casing.
  • bridges reduces the mass of the housing dedicated to maintaining the pipes: this method of maintaining by elements positioned in a discrete manner leads to a housing much lighter than if the pipes were overmolded over their entire length. The housing can therefore be sized with a minimum mass.
  • Said mold comprises at least one recessed location around said pipe so as to provide a holding bridge of said pipe, extending from said wall of the casting.
  • At least one pipe runs through a wall, said pipe being overmolded for its part external to said part. This avoids the problems of sealing at the crossing of the wall.
  • the invention also relates to a casting made by one of the methods described above wherein the pipe is made of the same alloy as the casting.
  • the melting temperatures of the casing and the pipework are then close and the risk of damage to the piping during casting is reduced.
  • the invention furthermore relates to a casing comprising a casting piece of light alloy made by a method described above, and a casing in which the pipework is made in substantially the same alloy as the casting.
  • gearbox comprising a housing as described above and an aeronautical engine comprising such a gearbox.
  • FIG. 1 one sees a half of a casing 1 of gearbox for aeronautical engine according to the prior art.
  • This housing is a foundry piece made of light alloy.
  • the casing 1 has an elongate and curved shape, similar to that of a banana, to adapt to the circular shape of the engine on which it is mounted. It forms a box intended to receive the gears.
  • the housing has two substantially planar bottom walls 2 and a peripheral wall 3, closed on itself and extending perpendicularly to the bottom wall.
  • the bottom walls 2 are pierced with holes to let through the shafts driven by the pinions (not shown) of the gearbox.
  • On the bottom walls 2 of the box run piping 4, whose function is to carry a fluid, such as oil, lubrication and recovery of the calories generated by the gears.
  • a pipe 4 is seen running along the angle formed by the bottom wall 2 and the peripheral wall 3 of a casing 1 of the prior art.
  • This pipe 4 is made integrally with the bottom wall 2 and the peripheral wall 3, coming directly from the foundry with the two corresponding walls, and is integral with them.
  • a bypass pipe 6 is detached to feed a particular gear.
  • This bypass pipe 6 differs from the other pipes 4 in that it passes through one of the walls 2 of the casing 1.
  • the production of this type of pipe posed a particular problem in the prior art because it was necessary to position the core accurately. representative of this future piping in the crankcase mold.
  • By placing the actual piping in the mold before pouring the metal and overmolding it by pouring we obtain the guarantee that the exit point of this pipe will be perfectly positioned and thus avoid the risks of waste casings for which the positioning the exit point would not be correctly placed.
  • a pipe 4 which passes through one of the bottom walls 2 of the housing, then flowing outside the housing. Oil mists fill the inside of the crankcase. All the part of the pipe which is found outside the housing is overmolded, so that there is no break in sealing, at the passage of the wall, between the inside and outside of the housing .
  • the pipes 4 intended to be introduced into the casing 1 are made before casting, according to a method of manufacture classic. They are preferably made in the same alloy as that chosen for producing the casing, in order to avoid the problems of differential expansions that would appear if materials of different compositions were chosen. However, they can be made in an alloy similar to that provided for casting, provided that the melting temperatures of the two parts are not too far apart.
  • the invention proposes to protect the pipes with a thermal barrier on their outer circumference.
  • the pipes are subjected, prior to their installation in the foundry mold, to a surface treatment such as anodic oxidation, which generates a surface layer of oxide. Any other surface treatment resulting in the establishment of a thermal barrier is also possible.
  • a mold is made, again in a conventional manner, corresponding to the desired shape for the casing after molding; this form is defined a priori, without taking into account the pipes 4.
  • the casing is finally made by the casting of the metal that constitutes it.
  • the pipes 4 are now fixed on the walls of the casing by the bridges 5 which form during the cooling of the metal of the casting.
  • the pipes 4 are subjected to conventional anodic oxidation (or any other surface treatment which would create a thermal barrier on its external part), than at the level of their portions which will be trapped by bridges 5 The rest of the pipes will then be subjected to the surface treatment which is applied to the entire housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP10708559.9A 2009-03-17 2010-03-16 Méthode de réalisation d'un carter avec tuyauteries rapportées, carter et son utilisation Active EP2408578B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0951701A FR2943264B1 (fr) 2009-03-17 2009-03-17 Carter moule avec tuyauteries rapportees
PCT/EP2010/053335 WO2010106043A1 (fr) 2009-03-17 2010-03-16 Carter moulé avec tuyauteries rapportées

Publications (2)

Publication Number Publication Date
EP2408578A1 EP2408578A1 (fr) 2012-01-25
EP2408578B1 true EP2408578B1 (fr) 2017-05-31

Family

ID=40786795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10708559.9A Active EP2408578B1 (fr) 2009-03-17 2010-03-16 Méthode de réalisation d'un carter avec tuyauteries rapportées, carter et son utilisation

Country Status (10)

Country Link
US (1) US8528625B2 (zh)
EP (1) EP2408578B1 (zh)
JP (1) JP5486077B2 (zh)
CN (1) CN102355965B (zh)
BR (1) BRPI1009406B1 (zh)
CA (1) CA2754687C (zh)
ES (1) ES2636893T3 (zh)
FR (1) FR2943264B1 (zh)
RU (1) RU2539497C2 (zh)
WO (1) WO2010106043A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9835239B2 (en) * 2016-01-21 2017-12-05 General Electric Company Composite gearbox housing
FR3070726B1 (fr) * 2017-09-07 2019-08-23 Safran Transmission Systems Boitier d'accessoires pour turbomachine

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1238335A (fr) * 1959-06-29 1960-08-12 Hispano Suiza Sa Perfectionnements apportés aux pièces en métal léger, notamment aux culasses de moteur, devant comporter des inclusions métalliques, et aux procédés pour leur élaboration
US4450886A (en) * 1980-07-14 1984-05-29 Nakamura Kinzoku Kogyosho, Inc. Method of producing suction manifolds for automobile engines
JPS58217671A (ja) * 1982-06-14 1983-12-17 Mitsubishi Heavy Ind Ltd 転写用溶射皮膜の製造方法
DE10304971C5 (de) * 2002-11-26 2008-06-12 Fritz Winter Eisengiesserei Gmbh & Co. Kg Gegossenes Bauteil für eine Brennkraftmaschine
US4865112A (en) * 1988-07-07 1989-09-12 Schwarb Foundry Company Method of casting metals with integral heat exchange piping
DE3837254A1 (de) * 1988-11-03 1990-05-10 Bayerische Motoren Werke Ag Leichtmetall-einlage fuer die bildung einer dehnfuge in aus leichtmetallguss gebildeten brennraumwaenden von brennkraftmaschinen, insbesondere zylinderkopfboden von diesel-brennkraftmaschinen
US5040589A (en) * 1989-02-10 1991-08-20 The Dow Chemical Company Method and apparatus for the injection molding of metal alloys
JPH03142058A (ja) * 1989-10-30 1991-06-17 Atsugi Unisia Corp 鋳包み鋳造方法
FR2665384B1 (fr) 1990-08-02 1992-10-16 Montupet Sa Procede de realisation d'une piece moulee en al ou ses alliages munie de canaux integres.
FR2708495B1 (fr) * 1993-08-03 1995-09-08 Renault Procédé de fabrication d'un élément de carter à tubes insérés et élément de carter obtenu par ce procédé.
CN1042805C (zh) * 1994-03-28 1999-04-07 本溪钢铁公司 一种钢管镶铸方法
JPH11285808A (ja) * 1998-04-02 1999-10-19 Nippon Light Metal Co Ltd 鋳ぐるみ方法
JP2995172B2 (ja) * 1998-04-13 1999-12-27 松尾工業株式会社 シリンダ装置
JP3237646B2 (ja) * 1999-03-09 2001-12-10 日本軽金属株式会社 ブレーキキャリパ鋳造用金型
JP3339503B2 (ja) * 2001-07-26 2002-10-28 日本軽金属株式会社 パイプ鋳ぐるみ用金型
CN1187151C (zh) * 2002-02-09 2005-02-02 安阳钢铁集团有限责任公司 一种内置水冷通道铸钢件的制造方法
WO2004048765A1 (de) * 2002-11-26 2004-06-10 Fritz Winter Eisengiesserei Gmbh & Co. Kg Gegossenes bauteil für eine brennkraftmaschine
CN1566410A (zh) * 2003-06-26 2005-01-19 利奇机械工业股份有限公司 铝铸材阳极处理方法
DE102007030342B4 (de) * 2007-06-29 2010-10-07 Trimet Aluminium Ag Verfahren und Vorrichtung zum Druckgießen von gegliederten Metallgussstücken

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN102355965B (zh) 2014-09-03
FR2943264B1 (fr) 2012-11-16
FR2943264A1 (fr) 2010-09-24
WO2010106043A1 (fr) 2010-09-23
CA2754687A1 (fr) 2010-09-23
EP2408578A1 (fr) 2012-01-25
CN102355965A (zh) 2012-02-15
RU2539497C2 (ru) 2015-01-20
RU2011141762A (ru) 2013-04-27
US8528625B2 (en) 2013-09-10
US20120003494A1 (en) 2012-01-05
JP2012520774A (ja) 2012-09-10
JP5486077B2 (ja) 2014-05-07
ES2636893T3 (es) 2017-10-10
BRPI1009406A2 (pt) 2016-03-01
BRPI1009406B1 (pt) 2018-06-05
CA2754687C (fr) 2017-04-18

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