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EP1401598A2 - Method for producing a light-alloy bearing bush with a rough external surface - Google Patents

Method for producing a light-alloy bearing bush with a rough external surface

Info

Publication number
EP1401598A2
EP1401598A2 EP02754187A EP02754187A EP1401598A2 EP 1401598 A2 EP1401598 A2 EP 1401598A2 EP 02754187 A EP02754187 A EP 02754187A EP 02754187 A EP02754187 A EP 02754187A EP 1401598 A2 EP1401598 A2 EP 1401598A2
Authority
EP
European Patent Office
Prior art keywords
particles
producing
liner
casting mold
bearing bush
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.)
Withdrawn
Application number
EP02754187A
Other languages
German (de)
French (fr)
Inventor
Karlheinz Bing
Martin RÜHLE
Fritz Warth
Frank Winger
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.)
Mahle GmbH
Original Assignee
Mahle 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
Priority claimed from DE10218714A external-priority patent/DE10218714A1/en
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1401598A2 publication Critical patent/EP1401598A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • 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
    • 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
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/002—Removing cores by leaching, washing or dissolving
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making
    • Y10T29/49272—Cylinder, cylinder head or engine valve sleeve making with liner, coating, or sleeve
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y10T29/49647—Plain bearing
    • Y10T29/49668—Sleeve or bushing making
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49705—Coating or casting
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating
    • Y10T29/49984—Coating and casting

Definitions

  • the invention relates to a method for producing a light metal liner with an outer rough surface for an internal combustion engine.
  • a method for producing a light metal liner with an outer rough surface for an internal combustion engine is known from DE 19958185.
  • the rough surface of the light metal bushing is created when the bushing is cast in the lost-foa process, in that the foam casting model of the bushing has an outer particle layer with undercuts, which leads to a correspondingly undercut shape of the outer surface of the cast bushing.
  • the rough surface of the liner is a prerequisite for a good connection between the liner and the encapsulation material when casting the engine block.
  • the invention is concerned with the problem of enabling the production of a liner with an outer rough surface also in permanent mold or sand casting.
  • Fixation of the particles is understood to mean that the particles at least do not detach from the casting mold as a result of gravity or float when the melt is poured in.
  • the fixation is only possible if possible weak to choose that the partially cast particles detach easily from the surface of the casting mold, in particular a mold or a sheet metal insert for a mold, when the light metal sleeve is formed.
  • the particles are particularly preferably fixed in the casting mold by means of core binders which are usually used in the production of sand cores or sand molds.
  • Sand molds or inserts made of sand, and also divided sand molds, can also be used as the casting mold.
  • a particle size of the particles in a range from 0.3 mm to 1.5 mm leads to an increase in the specific surface area, which is created by many small undercuts from the particle mixture.
  • the rough surface does not necessarily have to be present over the entire surface of the liner, but can be restricted to partial areas.
  • the largest diameter of the liner is determined in the rough area by the inner diameter of the mold or the mold insert to which the particles are applied.
  • Each particle is imaged with respect to the outer diameter of the liner as a depression or as a location of smaller diameter during casting. Since the particles are accessible from the outer diameter after the liner has been formed, they can be dissolved in a liquid or mechanically z. B. can be removed by sandblasting from the liner. Instead of the dissolved particles, depressions remain on the outer diameter of the liner blank.
  • the particles advantageously consist of salt, as is also known from the production of salt cores for cooling channels.
  • Fig. 1 is a liner with a rough surface in the upper area.
  • the upper bushing has a jagged surface on the upper approx. 60% of its length, which is caused by partially cast and later released salt particles.
  • the liner is comparatively smooth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

The aim of the invention is to produce a light-alloy bearing bush with a rough external surface. To achieve this, particles, which are subsequently surrounded in part by the molten metal, are applied to the surface of the casting mould. When the bearing bush is released from the mould, the particles remain in said bush and are subsequently removed from the bearing bush preform either mechanically or by being dissolved in liquid.

Description

Verfahren zur Herstellung einer Leichtmetalllaufbuchse mit einer äußeren rauen Oberfläche Process for producing a light metal liner with an outer rough surface
Die Erfindung betrifft ein Verfahren zur Herstellung einer Leichtmetalllaufbuchse mit einer äußeren rauen Oberfläche für einen Verbrennungsmotor. Ein derartiges Verfahren ist aus der DE 19958185 bekannt. Dort wird die raue Oberfläche der Leichtmetalllaufbuchse beim Abgießen der Laufbuchse im Lost-Foa -Verfahren erzeugt, indem das Schaumstoffgußmodell der Laufbuchse eine äußere Partikelschicht mit Hinterschnitten aufweist, die zu einer entsprechend hinterschnit- tenen Form der Außenoberfläche der gegossenen Laufbuchse führt. Die raue Oberfläche der Laufbuchse ist Voraussetzung dafür, daß sich beim Gießen des Motorblocks eine gute Verbindung zwischen der Laufbuchse und dem Umgußmaterial einstellt.The invention relates to a method for producing a light metal liner with an outer rough surface for an internal combustion engine. Such a method is known from DE 19958185. There, the rough surface of the light metal bushing is created when the bushing is cast in the lost-foa process, in that the foam casting model of the bushing has an outer particle layer with undercuts, which leads to a correspondingly undercut shape of the outer surface of the cast bushing. The rough surface of the liner is a prerequisite for a good connection between the liner and the encapsulation material when casting the engine block.
Die Erfindung beschäftigt sich mit dem Problem, die Herstellung einer Laufbuchse mit einer äußeren rauen Oberfläche auch im Kokillenguß oder Sandguß zu ermöglichen.The invention is concerned with the problem of enabling the production of a liner with an outer rough surface also in permanent mold or sand casting.
Dieses Problem wird gelöst durch ein Verfahren nach Anspruch 1. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche .This problem is solved by a method according to claim 1. Advantageous further developments are the subject of the dependent claims.
Unter Fixierung der Partikel ist zu verstehen, daß die Partikel zumindest sich nicht schwerkraftbedingt von der Gießform ablösen oder beim Einfüllen der Schmelze aufschwimmen. Andererseits ist die Fixierung nach Möglichkeit nur so schwach zu wählen, daß sich die teilumgossenen Partikel beim Ausformen der Leichtmetalllaufbuchse problemlos von der Oberfläche der Gießform, insbesondere einer Kokille oder einem Blecheinsatz für eine Kokille lösen. Besonders bevorzugt erfolgt die Fixierung der Partikel in der Gießform mittels Kernbindemitteln, die üblicherweise bei der Herstellung von Sandkernen oder Sandformen eingesetzt werden.Fixation of the particles is understood to mean that the particles at least do not detach from the casting mold as a result of gravity or float when the melt is poured in. On the other hand, the fixation is only possible if possible weak to choose that the partially cast particles detach easily from the surface of the casting mold, in particular a mold or a sheet metal insert for a mold, when the light metal sleeve is formed. The particles are particularly preferably fixed in the casting mold by means of core binders which are usually used in the production of sand cores or sand molds.
Als Gießform können auch Sandformen oder Einsätze aus Sand, auch geteilte Sandformen verwendet werden.Sand molds or inserts made of sand, and also divided sand molds, can also be used as the casting mold.
Es hat sich als vorteilhaft herausgestellt, daß eine Korngröße der Partikel in einem Bereich von 0,3 mm bis 1,5 mm zu einer Vergrößerung der spezifischen Oberfläche führt, die durch viele kleine Hinterschneidungen aus dem Partikelgemisch entsteht.It has proven to be advantageous that a particle size of the particles in a range from 0.3 mm to 1.5 mm leads to an increase in the specific surface area, which is created by many small undercuts from the particle mixture.
Die raue Oberfläche muß nicht notwendigerweise über die gesamte Oberfläche der Laufbuchse vorliegen, sondern kann auf Teilbereiche beschränkt sein.The rough surface does not necessarily have to be present over the entire surface of the liner, but can be restricted to partial areas.
Der größte Durchmesser der Laufbuchse ist im rauen Bereich bestimmt durch den Innendurchmesser der Kokille bzw. des Kokilleneinsatzes, auf den die Partikel aufgebracht sind. Jeder Partikel wird beim Gießen bezüglich des Außendurchmessers der Laufbuchse als Vertiefung bzw. als Stelle geringeren Durchmessers abgebildet. Da die Partikel nach dem Ausformen der Laufbuchse vom Außendurchmesser her zugänglich sind, können sie in einer Flüssigkeit aufgelöst werden oder mechanisch z. B. durch Sandstrahlen aus der Laufbuchse entfernt werden. Anstelle der aufgelösten Partikel verbleiben Vertiefungen am Außendurchmesser des Laufbuchsenrohlings . Die Partikel bestehen vorteilhaft aus Salz, wie es auch von der Herstellung von Salzkernen für Kühlk,anäle bekannt ist.The largest diameter of the liner is determined in the rough area by the inner diameter of the mold or the mold insert to which the particles are applied. Each particle is imaged with respect to the outer diameter of the liner as a depression or as a location of smaller diameter during casting. Since the particles are accessible from the outer diameter after the liner has been formed, they can be dissolved in a liquid or mechanically z. B. can be removed by sandblasting from the liner. Instead of the dissolved particles, depressions remain on the outer diameter of the liner blank. The particles advantageously consist of salt, as is also known from the production of salt cores for cooling channels.
Die Erfindung wird im folgenden anhand einer erfindungsgemäß hergestellten Laufbuchse näher erläutert. Es zeigt:The invention is explained in more detail below with the aid of a liner produced according to the invention. It shows:
Fig. 1 eine Laufbuchse mit rauer Oberfläche im oberen Bereich.Fig. 1 is a liner with a rough surface in the upper area.
Die Laufbuchse weist auf den oberen ca. 60 % ihrer Länge eine zerklüftete Oberfläche auf, die durch teilumgossene und später ausgelöste Salzpartikel entstanden ist. Im unteren Bereich der Laufbuchse, der durch Verwendung eines entsprechenden Kokilleneinsatzes einen etwas kleineren Durchmesser aufweist, ist die Laufbuchse vergleichsweise glatt. The upper bushing has a jagged surface on the upper approx. 60% of its length, which is caused by partially cast and later released salt particles. In the lower area of the liner, which has a somewhat smaller diameter due to the use of a corresponding mold insert, the liner is comparatively smooth.

Claims

Patentansprüche claims
1. Verfahren zur Herstellung einer Leichtmetalllaufbuchse für Verbrennungsmotoren mit einer äußeren rauen Oberfläche, dadurch gekennzeichne , daß auf der Oberfläche einer Gießform oder eines Gießformeinsatzes zur Herstellung der Laufbuchse Partikel einer temperaturfesten Substanz adhäsiv fixiert werden, wobei die Partikelgröße vorzugsweise 0,3 mm bis 1,5 mm beträgt, anschließend in dieser Gießform oder in diesem Gießformeinsatz die Leichtmetalllaufbuchse gegossen wird, der Rohling mit den Partikeln aus der Gießform bzw. dem Gießformeinsatz entformt wird und die Partikel aus dem Laufbuchsenrohling entfernt werden.1. A method for producing a light metal liner for internal combustion engines with an outer rough surface, characterized in that particles of a temperature-resistant substance are adhesively fixed on the surface of a casting mold or a casting mold insert for producing the liner, the particle size preferably being 0.3 mm to 1. 5 mm, then the light metal bushing is cast in this casting mold or in this casting mold insert, the blank with the particles is removed from the casting mold or the casting mold insert and the particles are removed from the bushing blank.
2. Verfahren zur Herstellung einer Leichtmetalllaufbuchse nach Anspruch 1, dadurch gekennzeichne , daß die Partikel durch Auflösen in einer Flüssigkeit aus dem Laufbuchsenrohling entfernt werden.2. A method for producing a light metal bushing according to claim 1, characterized in that the particles are removed from the bushing blank by dissolving them in a liquid.
3. Verfahren nach Anspruch 2 , dadurch gekennzeichne , daß die Flüssigkeit ein Lösungsmittel auf Wasserbasis ist . 3. The method according to claim 2, characterized in that the liquid is a water-based solvent.
EP02754187A 2001-06-23 2002-06-07 Method for producing a light-alloy bearing bush with a rough external surface Withdrawn EP1401598A2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10130416 2001-06-23
DE10130416 2001-06-23
DE10218714 2002-04-26
DE10218714A DE10218714A1 (en) 2001-06-23 2002-04-26 Process for producing a light metal liner with an outer rough surface
PCT/DE2002/002074 WO2003000447A2 (en) 2001-06-23 2002-06-07 Method for producing a light-alloy bearing bush with a rough external surface

Publications (1)

Publication Number Publication Date
EP1401598A2 true EP1401598A2 (en) 2004-03-31

Family

ID=26009576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754187A Withdrawn EP1401598A2 (en) 2001-06-23 2002-06-07 Method for producing a light-alloy bearing bush with a rough external surface

Country Status (5)

Country Link
US (1) US6957489B2 (en)
EP (1) EP1401598A2 (en)
JP (1) JP4266816B2 (en)
BR (1) BRPI0210614B1 (en)
WO (1) WO2003000447A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6256524B2 (en) * 2016-05-17 2018-01-10 スズキ株式会社 Cast-in member and manufacturing method thereof

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GB975032A (en) * 1960-11-26 1964-11-11 Heinz Teves Improvements in the preparation of bi-metallic castings
DE4020268C1 (en) * 1990-06-26 1991-08-14 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De

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Publication number Priority date Publication date Assignee Title
GB975032A (en) * 1960-11-26 1964-11-11 Heinz Teves Improvements in the preparation of bi-metallic castings
DE4020268C1 (en) * 1990-06-26 1991-08-14 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De

Also Published As

Publication number Publication date
US20040163256A1 (en) 2004-08-26
JP4266816B2 (en) 2009-05-20
US6957489B2 (en) 2005-10-25
BR0210614A (en) 2004-06-29
BRPI0210614B1 (en) 2015-10-13
WO2003000447A3 (en) 2003-03-13
JP2004530565A (en) 2004-10-07
WO2003000447A2 (en) 2003-01-03

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