EP2408578A1 - Carter moulé avec tuyauteries rapportées - Google Patents
Carter moulé avec tuyauteries rapportéesInfo
- Publication number
- EP2408578A1 EP2408578A1 EP10708559A EP10708559A EP2408578A1 EP 2408578 A1 EP2408578 A1 EP 2408578A1 EP 10708559 A EP10708559 A EP 10708559A EP 10708559 A EP10708559 A EP 10708559A EP 2408578 A1 EP2408578 A1 EP 2408578A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- casting
- piping
- casing
- 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.)
- Granted
Links
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.
- US 4450886 which relates to a method of producing suction pipes in the field of the automobile, in which an exhaust gas recirculation tube is integrated. This document does not mention in particular how the recirculation tube is held during the casting of the metal of the suction tube.
- the object of the present invention is to remedy these drawbacks by proposing a method for producing a light alloy casing which does not have some of the disadvantages of the prior art and which, in particular, results in a casing optimized in terms of mass devoted to the realization of its internal pipes.
- the subject of the invention is a method for producing a light-alloy cast part comprising at least one pipe carried by a wall of said part, said method comprising the steps of producing said pipe, producing a mold reproducing the shape of said piece without said pipe, positioning said pipe in said mold and casting the metal to make said piece, characterized in that at least one part of the pipe prior to the installation thereof in the mold, a surface treatment step for generating a thermal barrier between this portion of said pipe and the casting metal, said mold comprising at least one location in hollow around the piping so as to make a piping holding bridge, extending from said wall of the casting.
- 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.
- the surface treatment is anodic oxidation.
- Such treatment is commonly used in the manufacture of light alloy parts and is therefore easy to achieve.
- said mold comprises at least one recessed location around said piping so as to provide a holding bridge for said pipe, extending from said wall of the casting.
- the pipe when at least one pipe runs through a wall, said pipe is 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 in substantially the same alloy as the casting.
- the invention furthermore relates to a casing comprising a casting piece of light alloy made by a method described above, as well as a casing in which the pipework is made in substantially the same alloy as the casting piece. Finally, it relates to a gearbox comprising a housing as described above and an aeronautical engine comprising such a gearbox.
- FIG. 1 is a perspective view of a half of a molded casing, of the prior art, in which the pipes are integrated in the casing;
- FIG. 2 is a perspective view of a cross section of the same casing according to the prior art
- FIG. 3 is a perspective view of a half of a molded casing, according to one embodiment of the invention, in which the pipes are attached before the foundry operation,
- FIG. 4 is a perspective view of a cross section of a molded housing, according to one embodiment of the invention.
- a half of a casing 1 of gearbox for an 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.
- FIG. 2 there is a pipe 4 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.
- FIG. 3 there is shown a housing 1 in which the pipes 4 are detached from the walls 2 and 3 of the casing 1, to which they are attached by bridges 5, they foundry, with the walls of the casing 1.
- the pipes 4 are made of the same alloy as the casing 1 but are made prior to the casting of this casing.
- FIG 4 shows a pipe 4 housed inside the housing 1, 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.
- the embodiment of a casing 1 according to the invention is thus carried out as follows:
- the pipes 4 intended to be introduced into the casing 1 are made prior to 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 periphery.
- 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 shape is defined a priori, without taking into account the pipes 4. These are then placed inside the mold before casting and positioned at their final location, in relation to the position of the walls to come from the housing, according to conventional techniques known to those skilled in the art. Depressed locations are formed in the mold, surrounding at intervals the pipes 4 so that bridges 5 are formed around these pipes and ensure their maintenance once the casting is completed.
- 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)
Abstract
Description
Claims
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 true EP2408578A1 (fr) | 2012-01-25 |
| EP2408578B1 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 (fr) |
| EP (1) | EP2408578B1 (fr) |
| JP (1) | JP5486077B2 (fr) |
| CN (1) | CN102355965B (fr) |
| BR (1) | BRPI1009406B1 (fr) |
| CA (1) | CA2754687C (fr) |
| ES (1) | ES2636893T3 (fr) |
| FR (1) | FR2943264B1 (fr) |
| RU (1) | RU2539497C2 (fr) |
| WO (1) | WO2010106043A1 (fr) |
Families Citing this family (2)
| 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)
| 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 |
| EP1570167B1 (fr) * | 2002-11-26 | 2009-02-25 | Fritz Winter Eisengiesserei GmbH & Co. KG | Composant coule destine a un moteur a combustion interne |
| 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 |
-
2009
- 2009-03-17 FR FR0951701A patent/FR2943264B1/fr active Active
-
2010
- 2010-03-16 US US13/256,687 patent/US8528625B2/en active Active
- 2010-03-16 RU RU2011141762/02A patent/RU2539497C2/ru active
- 2010-03-16 JP JP2012500216A patent/JP5486077B2/ja not_active Expired - Fee Related
- 2010-03-16 ES ES10708559.9T patent/ES2636893T3/es active Active
- 2010-03-16 WO PCT/EP2010/053335 patent/WO2010106043A1/fr not_active Ceased
- 2010-03-16 EP EP10708559.9A patent/EP2408578B1/fr active Active
- 2010-03-16 BR BRPI1009406-7A patent/BRPI1009406B1/pt not_active IP Right Cessation
- 2010-03-16 CA CA2754687A patent/CA2754687C/fr not_active Expired - Fee Related
- 2010-03-16 CN CN201080012446.6A patent/CN102355965B/zh active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010106043A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2754687C (fr) | 2017-04-18 |
| CA2754687A1 (fr) | 2010-09-23 |
| JP5486077B2 (ja) | 2014-05-07 |
| BRPI1009406A2 (pt) | 2016-03-01 |
| JP2012520774A (ja) | 2012-09-10 |
| CN102355965A (zh) | 2012-02-15 |
| RU2011141762A (ru) | 2013-04-27 |
| US20120003494A1 (en) | 2012-01-05 |
| CN102355965B (zh) | 2014-09-03 |
| EP2408578B1 (fr) | 2017-05-31 |
| ES2636893T3 (es) | 2017-10-10 |
| US8528625B2 (en) | 2013-09-10 |
| RU2539497C2 (ru) | 2015-01-20 |
| FR2943264B1 (fr) | 2012-11-16 |
| BRPI1009406B1 (pt) | 2018-06-05 |
| FR2943264A1 (fr) | 2010-09-24 |
| WO2010106043A1 (fr) | 2010-09-23 |
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