GB2200583A - Composite engine piston and its manufacture by casting - Google Patents

Composite engine piston and its manufacture by casting Download PDF

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Publication number
GB2200583A
GB2200583A GB08730338A GB8730338A GB2200583A GB 2200583 A GB2200583 A GB 2200583A GB 08730338 A GB08730338 A GB 08730338A GB 8730338 A GB8730338 A GB 8730338A GB 2200583 A GB2200583 A GB 2200583A
Authority
GB
United Kingdom
Prior art keywords
piston
reinforcing member
die
metal
metal reinforcing
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
Application number
GB08730338A
Other versions
GB2200583B (en
GB8730338D0 (en
Inventor
Duraid Mahrus
Luis Narvion Benito
Thomas Jose Carlos Klein
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.)
Metal Leve SA Industria e Commercio
Original Assignee
Metal Leve SA Industria e Commercio
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 Metal Leve SA Industria e Commercio filed Critical Metal Leve SA Industria e Commercio
Publication of GB8730338D0 publication Critical patent/GB8730338D0/en
Publication of GB2200583A publication Critical patent/GB2200583A/en
Application granted granted Critical
Publication of GB2200583B publication Critical patent/GB2200583B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B22D19/0009—Cylinders, pistons
    • B22D19/0027—Cylinders, pistons pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium

Description

Y c ENGINE PISTON AND METHOD FOR ITS MANUFACTURE -7 2 L' 0 0 58 j This
invention relates to a method for the manufacture of an internal combustion engine piston. More particularly. the invention relates to a piston of a light metal, namely aluminium or an aluminium alloy, provided with at least one metal reinforcing member on its crown portion.
The current state of development of internal combustion engines and the predictable trends in the field point to high output engines which inevitably impose increasingly high loads on engine components. Specifically in turbocharged diesel engines, the thermal and mechanical loads on the piston top reach levels which render this portion of the piston extremely vulnerable, making it liable to cracks and even breakage.
In order to solve these problems, it is one object of the present invention to provide the crown of an internal combustion engine piston with at least one metal reinforcing member in such a way as to increase the thermal and mechanical strength of said portion of the piston.
It is anotherobject of the prese nt invention to provide a piston in which at least one metal reinforcing member is directly connected to the piston by mechanical means.
It is a further object of the invention to provide a method to accomplish the mechanical fixing of at least one metal reinforcing member-to the piston.
According to the invention, the mechanical anchorage between the piston and the metal reinforcing member is accomplished by the piston material filling pores provided in the metal reinforcing member, this anchorage being carried out by a pressure casting method, namely the squeeze casting method.
According to the invention, there is provided a metal reinforcing member having pores all over its surface and throughout its thickness. Minimum pore diameter is preferably less than 3,01im and the method employed to fill the pores causes the piston material to rise to at least part of the porous surface opposite to the surface of the metal reinforcing member engaging the piston.
The invention.will be hereinafter described with reference to the accompanying drawing in which the single figure depicts a longitudinal cross-section of a piston half provided on its crown portion with a first reinforcing member 20 in the form of a ring carrier having a ring groove, and a 1 k 1 second reinforcing member 30 on the piston bowl rim.
According to the preferred method of the invention to manufacture a piston as shown in the drawing, a pressure casting die is firstly heated to a temperature between 200C and 400'C and porous metal reinforcing members 20, 30 are heated to a temperature between 4OWC and 7500C. Thereafter, the metal reinforcing members 20, 30 are placed in the die. A predetermined amount of molten aluminium alloy at a, temperature between 680'C and 82VC is then poured in the die. Thereafter, a punch having a contour which correspondsto the piston cavity shape is introduced into the die, at first without any pressure applied to it except the pressure resulting.from the punches own weight. As solidification of the aluminiumalloy begins and as it develops, a pressure of up to 2,000 bar is progressively applied to the punch so as to compress the alloy material between the punch and the die wall and against the metal reinforcing members 20, 30, thereby defining the shape of the piston 10 and causing the alloy to fill the pores provided in the metal reinforcing members 20, 30. After solidification of the aluminiumalloy, the piston 10 with the metal reinforcing members 20, 30 now integral with it is removed from the die and machined to its final dimensions, including provision of at least one ring groove on the reinforcing member 20.
1 ika - 4 9 The material used for making the porous metal reinforcing member is preferably a sintered alloy, the composition of which by weight percentage is 1.0 to 20.0 Chromium (Cr); 4.0 to 30.0 Nickel (Ni); maximum 3.0 Carbon (C); maximum 8. 0 Copper (Cu) maximum 3. 0 Silicon (Si) maximum 9. 0 manganese (mn) the remaining Iron (Fe).
i 1 'i -

Claims (15)

1. A method of manufacture of a piston for an internal combustion engine, said piston incorporating a metal reinforcing member provided with open pores, the method comprising the steps of:
(a) heating the metal reinforcing member and placing it in a previously heated die; (b) pouring molten aluminiumor aluminiumalloy into the die; (c) introducing a punch into the die so as to cause the aluminium or aluminium al loy to be compressed as it solidif ies so that the compressed metal surrounds the metal reinforcing member and fills the pores thereof to form the piston; (d) after-solidification, removing from the die the piston incorporating the metal reinforcing member and machining said piston to its final dimensions.
2. A method as claimed in claim 1, wherein the metal reinforcing member is heated to a temperature between 400C and 7500C before being placed in the die.
3. A method as claimed in claim 1 or 2 wherein the die is heated to a temperature between 200'C and 400C.
4. A method as claimed in claim 1, 2 or 3 wherein the molten aluminium or aluminJ urLl alloy is poured into the die at a temperature between 680C and 820C.
5. A method as claimed in any preceding claim, wherein the punch is introduced in the die at a maximum pressure of 2,000 bar.
6. A method as claimed in any preceding claim wherein the open pores of the metal reinforcing member are filled throughout the thickness of the metal.reinforcing member.
7. A piston for an internal combustion engine made of aluminium or an aluminium alloy and incorporating at least one metal reinforcing member which is provided with open pores and is connected to the piston by the filling of said open pores with piston material.
8. A piston as claimed in claim 7 where-in the minimum pore diameter of the metal reinforcing member is less than 3,0jun.
9. A piston as claimed in claim 7 or 8, wherein the metal. reinforcing member is made of an alloy having the following composition by weight percentage:
1.0 to 20.0 Cr; 4.0 to 30.0 Ni; 3.0 Mo max.; 3.0 C max.; 8.0 Cu max.; 3.0 Si max.; 9.0 Mn max.; the remainder Fe.
k il C 10. A piston-as claimed in claim 9 wherein the alloy is a sintered alloy.
11. A piston as claimed in any of claims 7 to 10, wherein the metal, reinforcing member is a ring carrier located at the piston crown and. provided with at least one ring groove.
12. A piston as claimed in claim 11 wherein an additional metal reinforcing member is provided and consists of a reinforcing insert for the combustion bowl rim of the piston.
13. A piston as claimed in any of claims 7 to 10 wherein the metal reinforcing member is a reinforcing insert for the combustion bowl rim of said piston.
14. A piston for an internal combustion engine substantially as hereinbefore described with reference to and as illustrated by the acompanying drawing.
15. 'A method of manufacturing a piston for an internal combustion engine substantially as hereinbefore described.
Published 1988 at The Paten, Office. State House. 6671 High Holborn, London WClR 4TF. Further copies rawy be ob=iedd from The Patent OMce. SLIes Branch, St Mazy Cray, Orpmpon, Rent BR5 3RD. Frliitoed by Multiplex techniques 1. St, Mary Cray. Kent Con. 1/87.
GB8730338A 1987-01-29 1987-12-31 Engine piston and method for its manufacture Expired - Fee Related GB2200583B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BR8700527A BR8700527A (en) 1987-01-29 1987-01-29 PUMP AND PUMP MANUFACTURING PROCESS FOR INTERNAL COMBUSTION ENGINES

Publications (3)

Publication Number Publication Date
GB8730338D0 GB8730338D0 (en) 1988-02-03
GB2200583A true GB2200583A (en) 1988-08-10
GB2200583B GB2200583B (en) 1991-02-27

Family

ID=4041631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8730338A Expired - Fee Related GB2200583B (en) 1987-01-29 1987-12-31 Engine piston and method for its manufacture

Country Status (5)

Country Link
BR (1) BR8700527A (en)
DE (1) DE3801847A1 (en)
GB (1) GB2200583B (en)
MX (1) MX167957B (en)
SE (1) SE8800160L (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0424109A2 (en) * 1989-10-18 1991-04-24 Izumi Industries, Ltd. Aluminium alloy matrix composite for internal combustion engines
WO1994000614A2 (en) * 1992-06-30 1994-01-06 Mahle Gmbh Reinforcing material for pistons of internal combustion engines
US5341866A (en) * 1989-08-26 1994-08-30 Ae Piston Products Limited Method for the incorporation of a component into a piston
GB2313564A (en) * 1996-05-31 1997-12-03 Hitachi Metals Ltd Aluminium alloy member with insert provided therein possessing improved damping capacity
EP1132490A1 (en) * 1999-08-10 2001-09-12 NHK Spring Co., Ltd. Metal matrix composite and piston using the same
CN100429400C (en) * 2003-11-17 2008-10-29 孙前程 Liquid state forging die method manufactured automobile air compressor piston and its manufacturing technology
US8430077B2 (en) 2008-06-20 2013-04-30 Federal-Mogul Nurnberg Gmbh Method for producing a piston for an internal combustion engine and piston for an internal combustion engine

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06218521A (en) * 1993-01-26 1994-08-09 Unisia Jecs Corp Piston of internal combustion engine
DE19537848A1 (en) * 1995-10-11 1997-04-17 Mahle Gmbh Reinforcement part, the base material of which is austenitic cast iron
DE19612500A1 (en) * 1996-03-29 1997-10-02 Bleistahl Prod Gmbh & Co Kg Process for the production of cylinder heads for internal combustion engines
DE19710671C2 (en) * 1997-03-14 1999-08-05 Daimler Chrysler Ag Method for producing a component and use of a component produced in this way
DE19712624C2 (en) * 1997-03-26 1999-11-04 Vaw Motor Gmbh Aluminum matrix composite and process for its manufacture
DE19800594A1 (en) * 1998-01-09 1999-07-15 Gut Gieserei Umwelt Technik Gm Process for producing a component with partially liquid materials
DE19848649C5 (en) 1998-10-22 2008-11-27 Peter Greiner Carbon piston for an internal combustion engine
DE10113629A1 (en) * 2001-03-21 2002-10-02 Thyssen Krupp Automotive Ag Production of pistons or piston components such as piston heads for internal combustion engines comprises pre-forging a base body in a specified axial direction and forging the pre-formed piston body in one further axial direction
DE10146079A1 (en) * 2001-09-19 2003-04-03 Mahle Gmbh Method of manufacturing a piston or piston crown for an internal combustion engine
DE102004005799A1 (en) * 2004-02-06 2005-09-01 Daimlerchrysler Ag Method for producing a local reinforcement for a component of an internal combustion engine
DE102005042857A1 (en) * 2005-09-08 2007-03-22 Ks Kolbenschmidt Gmbh Piston for an internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1533512A (en) * 1976-09-01 1978-11-29 Mahle Gmbh Pistons
GB2132524A (en) * 1982-11-24 1984-07-11 Ae Plc Casting aluminium or aluminium alloys on to other metal materials
GB2187533A (en) * 1985-02-07 1987-09-09 Metal Leve Sa Method of attaching a ceramic insert to an alloy piston

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1519589A (en) * 1974-09-11 1978-08-02 Brico Eng Metal articles of aluminium having load-bearing inserts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1533512A (en) * 1976-09-01 1978-11-29 Mahle Gmbh Pistons
GB2132524A (en) * 1982-11-24 1984-07-11 Ae Plc Casting aluminium or aluminium alloys on to other metal materials
GB2187533A (en) * 1985-02-07 1987-09-09 Metal Leve Sa Method of attaching a ceramic insert to an alloy piston

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341866A (en) * 1989-08-26 1994-08-30 Ae Piston Products Limited Method for the incorporation of a component into a piston
EP0424109A2 (en) * 1989-10-18 1991-04-24 Izumi Industries, Ltd. Aluminium alloy matrix composite for internal combustion engines
EP0424109A3 (en) * 1989-10-18 1991-10-02 Izumi Industries Ltd. Aluminium alloy matrix composite for internal combustion engines
WO1994000614A2 (en) * 1992-06-30 1994-01-06 Mahle Gmbh Reinforcing material for pistons of internal combustion engines
WO1994000614A3 (en) * 1992-06-30 1994-03-03 Mahle Gmbh Reinforcing material for pistons of internal combustion engines
GB2313564A (en) * 1996-05-31 1997-12-03 Hitachi Metals Ltd Aluminium alloy member with insert provided therein possessing improved damping capacity
GB2313564B (en) * 1996-05-31 1998-08-05 Hitachi Metals Ltd Aluminum alloy member, with insert provided therein, possessing improved damping capacity and process for producing the same
US5976709A (en) * 1996-05-31 1999-11-02 Hitachi Kinzoku Kabushiki Kaisha Aluminum alloy member, with insert provided therein, possessing improved damping capacity and process for producing the same
EP1132490A1 (en) * 1999-08-10 2001-09-12 NHK Spring Co., Ltd. Metal matrix composite and piston using the same
EP1132490A4 (en) * 1999-08-10 2005-04-13 Nhk Spring Co Ltd Metal matrix composite and piston using the same
CN100429400C (en) * 2003-11-17 2008-10-29 孙前程 Liquid state forging die method manufactured automobile air compressor piston and its manufacturing technology
US8430077B2 (en) 2008-06-20 2013-04-30 Federal-Mogul Nurnberg Gmbh Method for producing a piston for an internal combustion engine and piston for an internal combustion engine

Also Published As

Publication number Publication date
MX167957B (en) 1993-04-26
DE3801847A1 (en) 1988-08-11
GB2200583B (en) 1991-02-27
SE8800160D0 (en) 1988-01-19
BR8700527A (en) 1988-08-16
SE8800160L (en) 1988-07-30
GB8730338D0 (en) 1988-02-03

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 19961231