EP0934781B1 - Method for manufacturing a cylinder liner - Google Patents
Method for manufacturing a cylinder liner Download PDFInfo
- Publication number
- EP0934781B1 EP0934781B1 EP98121662A EP98121662A EP0934781B1 EP 0934781 B1 EP0934781 B1 EP 0934781B1 EP 98121662 A EP98121662 A EP 98121662A EP 98121662 A EP98121662 A EP 98121662A EP 0934781 B1 EP0934781 B1 EP 0934781B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder liner
- tubular body
- forming
- cast
- cylinder
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/12—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially parallel to the axis of the work
- B21B19/16—Rolling tubes without additional rollers arranged inside the tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
Definitions
- the invention relates to a method for producing a Cylinder liner made of hypereutectic aluminum-silicon alloy, that when casting a cylinder block Light alloy is also cast in.
- the present invention is the Task based on a method for producing Cylinder liners made of hypereutectic aluminum-silicon alloy to indicate the simpler and is less expensive than the known one Method.
- This task is initiated in a procedure mentioned type according to the invention solved in that initially a tubular body made of the hypereutectic aluminum-silicon alloy is poured and that this tubular bodies then without cutting at temperatures between 380 and 515 ° C in a pressure rolling process is deformed.
- the invention surprisingly found that on the costly process of Spray compacting is dispensed with and instead a simple one Casting process used to manufacture tubular bodies can be if the tubular body subsequently in a pressure rolling process in the specified temperature range is deformed and not as in the prior art is extruded and then forged round.
- the pressure rolling process in that also tubular bodies with opposite to the Spray compacting process for larger silicon primary deposits with very low destruction rate can be further processed or further processed. It is therefore possible to make a bushing blank hypereutectic aluminum-silicon alloy in one easy-to-pour casting process, whereby as a result of the spray compacting process lower cooling rate larger silicon primary deposits form.
- this is not a problem Problems because different from the state of the art subsequently no extrusion process and subsequent Round forging process is used, but the cast tubular body are pressed rolled.
- the silicon primary excretions of the invention cylinder liners manufactured are 90% with a Particle dimensions from 5 to 60 ⁇ m.
- the vast majority The proportion of the particles has a size of 10 to 40 ⁇ m.
- This relatively large silicon primary deposits compared to those produced in the spray compacting process Blanks have no effect on the subsequent pressure rolling noticeably disadvantageous.
- the tubular body be lengthened by a factor of 5 to 7.
- the elongated body can then be the length of the Corresponding longitudinal segments separated from the cylinder liner or tapped and, if necessary, with bundles or Bevels.
- Figure 1 shows a pressure rolling arrangement with a cylindrical mandrel 2 on which a previously made hypereutectic cast aluminum-silicon alloy tubular body 4 is pushed on.
- the Spinning roll arrangement further comprises three controlled separately deliverable heatable pressure rollers 6. After The rollers and the mandrel are fed in same or opposite rotating movement and heated to operating temperatures of 430 to 510 ° C. This can elongate the cast tubular Body to the final dimensions of the manufactured Cylinder liner can be reached. The resultant elongated pipe is then divided into longitudinal sections, whose length corresponds to the length of the one to be manufactured Cylinder liners is selected. The cylinder liners can then with the light alloy Cylinder blocks are cast.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Herstellen einer Zylinderlaufbuchse aus übereutektischer Aluminium-Silizium-Legierung, die beim Gießen eines Zylinderblocks aus Leichtmetalllegierung miteingegossen wird.The invention relates to a method for producing a Cylinder liner made of hypereutectic aluminum-silicon alloy, that when casting a cylinder block Light alloy is also cast in.
Das Eingießen von aus übereutektischer Aluminium-Silizium-Legierung bestehenden Zylinderlaufbuchsen bei der Herstellung von Zylinderblöcken, vorzugsweise aus leichtvergießbarer untereutektischer Aluminium-Silizium-Legierung, ist bekannt. Es werden Zylinderlaufbuchsen aus übereutektischer Legierung verwandt, um Lauffläche für den Kolben bzw. die Kolbenringe mit blockig bzw. primär ausgeschiedenem Silizium auszubilden, deren den tragenden Anteil bildende Oberflächen durch mechanische oder chemische Bearbeitung verrundet und gegenüber der umgebenden Aluminium-Matrix leicht vorstehend ausgebildet ist, so dass Schmiertaschen vorhanden sind.The pouring of hypereutectic aluminum-silicon alloy existing cylinder liners at Manufacture of cylinder blocks, preferably from easily castable hypoeutectic aluminum-silicon alloy, is known. Cylinder liners are made hypereutectic alloy related to tread for the Piston or the piston rings with blocky or primary trained silicon, the load-bearing Proportional surfaces by mechanical or chemical processing rounded and compared to surrounding aluminum matrix slightly protruding is so that there are lubrication pockets.
Beispielsweise ist aus der DE 44 38 550 A1 und aus einer später erschienenen Veröffentlichung in MTZ Motortechnische Zeitschrift 58 (1997) derselben Erfinder ein aufwendiges Fertigungsverfahren für Zylinderlaufbuchsen bekannt. Hierbei wird im Sprühkompaktierverfahren eine zylinderförmig aufwachsende Luppe aus übereutektischer Aluminium-Silizium-Legierung mit infolge der hohen Abkühlungsgeschwindigkeit dieses Verfahrens feinkörnigen primären Silizium-Ausscheidungen erzeugt. Für das anschließende Strangpressen zu Buchsenrohlingen und für das sich hieran anschließende Rundkneten oder Rundschmieden müssen die Silizium-Primärausscheidungen sehr feinkörnig vorliegen, da sich anderenfalls ein hoher Zerstörungsgrad der Primärausscheidungen ergeben würde, der sich insgesamt nachteilig auf die tribologischen Eigenschaften der Lauffläche auswirken würde.For example, from DE 44 38 550 A1 and from one later published in MTZ Motortechnische Journal 58 (1997) by the same inventors an elaborate Manufacturing processes for cylinder liners known. Here, in the spray compacting process cylindric growing from hypereutectic Aluminum-silicon alloy with due to the high Cooling rate of this process is fine-grained primary silicon deposits. For the subsequent extrusion to socket blanks and for the subsequent kneading or forging the silicon primary deposits have to be very fine-grained otherwise there is a high degree of destruction of the primary excretions would result from the total disadvantageous on the tribological properties of the Tread would impact.
Aus der DE-A-195 32 252 ist weiter ein Verfahren bekannt, bei dem eine Zylinderlaufbuchse aus übereutektischer Aluminium-Silizium-Legierung durch Sprühkompaktieren hergestellt und anschliessend mittels Drückwalzen weiterbearbeitet werden.From DE-A-195 32 252 a method is also known in which a cylinder liner made of hypereutectic aluminum-silicon alloy by spray compacting and then further processed using spinning rollers.
Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Verfahren zum Herstellen von Zylinderlaufbuchsen aus übereutektischer Aluminium-Silizium-Legierung anzugeben, das einfacher und kostengünstiger durchführbar ist als das bekannte Verfahren.Proceeding from this, the present invention is the Task based on a method for producing Cylinder liners made of hypereutectic aluminum-silicon alloy to indicate the simpler and is less expensive than the known one Method.
Diese Aufgabe wird bei einem Verfahren der eingangs erwähnten Art erfindungsgemäß dadurch gelöst, dass zunächst ein rohrförmiger Körper aus der übereutektischer Aluminium-Silizium-Legierung gegossen wird und dass dieser rohrförmige Körper anschließend spanlos bei Temperaturen zwischen 380 und 515 °C in einem Drückwalzverfahren verformt wird.This task is initiated in a procedure mentioned type according to the invention solved in that initially a tubular body made of the hypereutectic aluminum-silicon alloy is poured and that this tubular bodies then without cutting at temperatures between 380 and 515 ° C in a pressure rolling process is deformed.
Mit der Erfindung wurde überraschenderweise festgestellt, dass auf den kostenintensiven Prozess des Sprühkompaktierens verzichtet und stattdessen ein einfaches Gießverfahren zum Herstellen rohrförmiger Körper angewandt werden kann, wenn der rohrförmige Körper nachfolgend in einem Drückwalzverfahren im angegebenen Temperaturbereich verformt wird und nicht wie beim Stand der Technik stranggepresst und anschließend rundgeschmiedet wird. Der Vorteil der Anwendung eines Drückwalzverfahrens besteht darin, dass auch rohrförmige Körper mit gegenüber dem Sprühkompaktierverfahren größeren Silizium-Primärausscheidungen mit sehr geringer Zerstörungsrate weiterverarbeitet bzw. weiterbearbeitet werden können. Es ist daher möglich, einen Buchsenrohling aus übereutektischer Aluminium-Silizium-Legierung in einem einfach durchführbaren Gießverfahren zu vergießen, wobei sich infolge der gegenüber dem Sprühkompaktierverfahren geringeren Abkühlungsgeschwindigkeit größere Silizium-Primärausscheidungen bilden. Dies bereitet jedoch keine Probleme, da im Unterschied zum Stand der Technik nachfolgend kein Strangpressverfahren und anschließendes Rundschmiedeverfahren angewandt wird, sondern die gegossenen rohrförmigen Körper drückgewalzt werden.The invention surprisingly found that on the costly process of Spray compacting is dispensed with and instead a simple one Casting process used to manufacture tubular bodies can be if the tubular body subsequently in a pressure rolling process in the specified temperature range is deformed and not as in the prior art is extruded and then forged round. The There is the advantage of using a pressure rolling process in that also tubular bodies with opposite to the Spray compacting process for larger silicon primary deposits with very low destruction rate can be further processed or further processed. It is therefore possible to make a bushing blank hypereutectic aluminum-silicon alloy in one easy-to-pour casting process, whereby as a result of the spray compacting process lower cooling rate larger silicon primary deposits form. However, this is not a problem Problems because different from the state of the art subsequently no extrusion process and subsequent Round forging process is used, but the cast tubular body are pressed rolled.
Nach dem Gießen des rohrförmigen Körpers bis zum Eingießen der Zylinderlaufbuchse in den Zylinderblock ist also nur ein einstufiger Verarbeitungsvorgang, nämlich Drückwalzen, erforderlich. Demgegenüber steht das zweistufige Strangpressen und anschließende Rundschmieden bekannter Herstellungsverfahren, was aufwendig und zudem teuer ist.After pouring the tubular body until pouring the cylinder liner in the cylinder block is therefore only a one-step processing process, namely pressure rolling, required. This contrasts with the two-stage Extrusion and subsequent forging known Manufacturing process, which is complex and also expensive.
Es erweist sich als besonders vorteilhaft, dass beim Verformen der rohrförmigen Körper im Drückwalzverfahren die schlussendlichen Innen- und Außendurchmesser der Zylinderlaufbuchse, die für das Eingießen in den Zylinderblock erforderlich sind, hergestellt werden können. Es werden die notwendigen Toleranzen von ± 0,1 mm erreicht.It proves to be particularly advantageous that the Deform the tubular body in the pressure rolling process final inner and outer diameter of the Cylinder liner designed for pouring into the Cylinder block are required can be manufactured. The required tolerances are ± 0.1 mm reached.
Die Silizium-Primärausscheidungen der erfindungsgemäß hergestellten Zylinderlaufbuchsen liegen zu 90 % mit einer Partikelabmessung von 5 bis 60 µm vor. Der überwiegende Anteil der Partikel hat eine Größe von 10 bis 40 µm. Diese verhältnismäßig großen Silizium-Primärausscheidungen verglichen mit im Sprühkompaktierverfahren hergestellten Rohlingen wirken sich beim anschließenden Drückwalzen nicht spürbar nachteilig aus.The silicon primary excretions of the invention cylinder liners manufactured are 90% with a Particle dimensions from 5 to 60 µm. The vast majority The proportion of the particles has a size of 10 to 40 µm. This relatively large silicon primary deposits compared to those produced in the spray compacting process Blanks have no effect on the subsequent pressure rolling noticeably disadvantageous.
Es erweist sich desweiteren als besonders vorteilhaft, dass beim Verformen im Drückwalzverfahren eine die Ausbildung einer Verklammerung der Laufbuchse in dem Umguss erleichternde Oberflächenstruktur erzeugt werden kann. Eine derartige Oberflächenstruktur wurde seither im Zuge einer sich anschließenden spanabhebenden Bearbeitung hergestellt.It also proves to be particularly advantageous that training in forming in the pressure rolling process a clamping of the liner in the casting facilitating surface structure can be generated. A Such a surface structure has been used since subsequent machining.
Im Zuge des Drückwalzens können die rohrförmigen Körper etwa um den Faktor 5 bis 7 gelängt werden. Von dem gelängten Körper können dann der Länge der Zylinderlaufbuchse entsprechende Längssegmente abgetrennt bzw. abgestochen und erforderlichenfalls mit Bunden oder Anfasungen versehen werden.In the course of the pressure rolling, the tubular body be lengthened by a factor of 5 to 7. Of the elongated body can then be the length of the Corresponding longitudinal segments separated from the cylinder liner or tapped and, if necessary, with bundles or Bevels.
Weitere Merkmale, Einzelheiten und Vorteile.der Erfindung ergeben sich aus den beigefügten Schutzansprüchen und der zeichnerischen Darstellung und nachfolgenden Beschreibung des erfindungsgemäßen Verfahrens. In der Zeichnung zeigt:
- die Figur
- eine schematische Ansicht einer Drückwalzanordnung.
- The figure
- is a schematic view of a pressure rolling arrangement.
Figur 1 zeigt eine Drückwalzanordnung mit einem zylindrischen Dorn 2, auf den ein zuvor aus übereutektischer Aluminium-Silizium-Legierung gegossener rohrförmiger Körper 4 aufgeschoben ist. Die Drückwalzanordnung umfasst desweiteren drei gesteuert separat zustellbare beheizbare Drückwalzen 6. Nach Zustellung der Walzen werden diese sowie der Dorn in gleich- oder gegenlaufende rotierende Bewegung versetzt und auf Betriebstemperaturen von 430 bis 510 °C erhitzt. Hierdurch kann eine Längung des gegossenen rohrförmigen Körpers auf die Endmaße der herzustellenden Zylinderlaufbuchse erreicht werden. Das hierbei entstehende gelängte Rohr wird anschließend in Längsabschnitte geteilt, deren Länge entsprechend der Länge der herzustellenden Zylinderlaufbuchsen gewählt ist. Die Zylinderlaufbuchsen können dann mit der Leichtmetalllegierung eines Zylinderblocks vergossen werden.Figure 1 shows a pressure rolling arrangement with a cylindrical mandrel 2 on which a previously made hypereutectic cast aluminum-silicon alloy tubular body 4 is pushed on. The Spinning roll arrangement further comprises three controlled separately deliverable heatable pressure rollers 6. After The rollers and the mandrel are fed in same or opposite rotating movement and heated to operating temperatures of 430 to 510 ° C. This can elongate the cast tubular Body to the final dimensions of the manufactured Cylinder liner can be reached. The resultant elongated pipe is then divided into longitudinal sections, whose length corresponds to the length of the one to be manufactured Cylinder liners is selected. The cylinder liners can then with the light alloy Cylinder blocks are cast.
Claims (4)
- Method of producing a cylinder liner from a hypereutectic aluminium-silicon alloy cast simultaneously with a cylinder block cast from a light metal alloy, characterised in that a tubular body (4) is first cast from the hypereutectic aluminium-silicon alloy and that this tubular body is then formed by flow forming at temperatures of between 380 and 515°C.
- Method according to claim 1, characterised in that the final internal and external diameters of the cylinder liner are produced during the forming by flow forming.
- Method according to claim 1 or claim 2, characterised in that a surface structure facilitating clamping of the liner in the material cast around it is produced during the forming by flow forming.
- Method according to claim 1, 2 or 3, characterised in that longitudinal sections are cut from the flow-formed tubular body (4), each longitudinal segment forming a cylinder liner.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19750686 | 1997-11-15 | ||
| DE19750686A DE19750686C1 (en) | 1997-11-15 | 1997-11-15 | Method of manufacturing a cylinder liner |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0934781A2 EP0934781A2 (en) | 1999-08-11 |
| EP0934781A3 EP0934781A3 (en) | 2000-07-26 |
| EP0934781B1 true EP0934781B1 (en) | 2003-02-26 |
Family
ID=7848853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98121662A Expired - Lifetime EP0934781B1 (en) | 1997-11-15 | 1998-11-13 | Method for manufacturing a cylinder liner |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0934781B1 (en) |
| DE (2) | DE19750686C1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19918230C2 (en) * | 1999-04-22 | 2001-06-28 | Daimler Chrysler Ag | Method for producing a tubular blank made of a hypereutectic aluminum-silicon alloy of a cylinder liner |
| DE10012787B4 (en) * | 2000-03-16 | 2008-04-10 | Volkswagen Ag | Process for producing light metal castings with cast-in bushings |
| CN111618153B (en) * | 2020-03-01 | 2022-04-12 | 浙江长兴和良智能装备有限公司 | Spinning method and spinning system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2854958A1 (en) * | 1978-12-20 | 1980-07-10 | Daimler Benz Ag | Composite cast cylinder blocks for IC engine - consists of aluminium alloy block cast round liners made of wear resistant, hypereutectic aluminium silicon alloy |
| AT359662B (en) * | 1979-03-16 | 1980-11-25 | Steyr Daimler Puch Ag | METHOD FOR PRODUCING CYLINDERS FOR TWO-STROKE ENGINES |
| ES8600096A1 (en) * | 1984-12-05 | 1985-10-01 | Mediterraneo Ind | Improvements in the manufacturing process for aluminium alloy die-cast cylinders. |
| DE3744095A1 (en) * | 1987-12-24 | 1989-07-13 | Josef Dipl In Ehrenschwendtner | Methods for the manufacture of cylinder liners |
| DE4307775A1 (en) * | 1993-03-12 | 1994-09-15 | Dynamit Nobel Ag | Method and device for producing high-strength pipes |
| EP0704613A1 (en) * | 1994-09-28 | 1996-04-03 | KS Aluminium Technologie Aktiengesellschaft | Compositely cast cylinder or cylinderblock |
| DE19523484C2 (en) * | 1995-06-28 | 2002-11-14 | Daimler Chrysler Ag | Method for producing a cylinder liner from a hypereutectic aluminum / silicon alloy for casting into a crankcase of a reciprocating piston machine and cylinder liner produced thereafter |
| DE19532244C2 (en) * | 1995-09-01 | 1998-07-02 | Peak Werkstoff Gmbh | Process for the production of thin-walled tubes (I) |
| DE19532252C2 (en) * | 1995-09-01 | 1999-12-02 | Erbsloeh Ag | Method of manufacturing bushings |
| JP3016364B2 (en) * | 1995-12-04 | 2000-03-06 | トヨタ自動車株式会社 | Method for manufacturing cylinder block of internal combustion engine |
-
1997
- 1997-11-15 DE DE19750686A patent/DE19750686C1/en not_active Expired - Lifetime
-
1998
- 1998-11-13 EP EP98121662A patent/EP0934781B1/en not_active Expired - Lifetime
- 1998-11-13 DE DE59807308T patent/DE59807308D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0934781A3 (en) | 2000-07-26 |
| DE59807308D1 (en) | 2003-04-03 |
| EP0934781A2 (en) | 1999-08-11 |
| DE19750686C1 (en) | 1999-09-23 |
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