EP0919715B1 - Cylinder liner - Google Patents
Cylinder liner Download PDFInfo
- Publication number
- EP0919715B1 EP0919715B1 EP98122756A EP98122756A EP0919715B1 EP 0919715 B1 EP0919715 B1 EP 0919715B1 EP 98122756 A EP98122756 A EP 98122756A EP 98122756 A EP98122756 A EP 98122756A EP 0919715 B1 EP0919715 B1 EP 0919715B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder liner
- liner according
- surface structure
- radial direction
- flank
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
-
- 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
Definitions
- the invention relates to a light metal alloy Pourable cylinder liner according to the preamble of Claim 1.
- the present invention is based on the object To improve the connection of a cylinder liner in the casting.
- undercuts are targeted by cutting Processing or also by a forming process, such as Spinning rollers, producible. Irregular undercuts, like if necessary generated by spraying or blasting can not be targeted under the term one manufactured macroscopic surface structure subsumed.
- the deliberately created macroscopic surface structure with the rib-shaped elevations can be in the form of preferably in the circumferential direction extending grooves or spiral Threads are formed.
- the pitch of the threads is preferably 1 to 4 mm.
- Embodiment of the invention includes the peripheral surface of the Cylinder liner a combination of left and right Legal threads.
- the depth of the Surface structure 0.3 to 2 mm, preferably 0.5 to 1.2 mm.
- a preferred embodiment of the cylinder liner is characterized by the groove or thread structure forming flank sections in a longitudinal section plane the cylinder liner between 0 and 30 °, preferably between 15 and 25 °, and very particularly advantageously about 25 ° to the radial direction of the cylinder liner are inclined.
- flank sections could be parallel to each other run, i.e. the same angle to the radial direction lock in.
- a trapezoidal shape with different angles of inclination to the radial direction prefers.
- mechanical Characteristic values of the casting and the cast part appropriate dimensioning of the slope or the distance of the Flank sections to be taken into account, so maximum radial and axial forces can be absorbed without that there is a break or tear in the area of the socket or the casting.
- flank sections has a gradation with a radially inner and a radially outer Section on.
- a gradation will prevents the cylinder liner from locating Force in the direction of the inclination of the Flank sections can detach because one of the two Sections in this direction Form-locking connection forms. So far it has been proven advantageous if the radially outer Section of the rear in the direction of inclination Flank section a smaller angle of inclination to has radial direction than the radially inner Subsection.
- the two sections are preferably one third section tied together.
- the Surface structure through a two-stage Machining process be formed, being in a first Level one undercut-free in the radial direction Surface structure is formed and in one subsequent forming process, e.g. Spinning, forging, the radially outer areas of the surface structure in axial direction are displaced so that they in radial undercuts.
- the first Machining process could also take shape here machining. It turns out however, as beneficial, albeit the first process Forming process, such as thrush rolls or extrusion.
- Figure 1 shows a first embodiment of a Thread profile, a respective rib-shaped elevation 2 defining and limiting flank sections 4, 6 each run parallel to each other. Both flank sections 4, 6 are at an angle ⁇ of approximately 25 ° to the radial direction 8 the only indicated cylinder liner 10 inclined.
- the Distance d between the groove flanks 6, 4 of two neighboring ones Elevations 2 is 1.4 mm.
- the slope S of the Threads are 2.4 mm and the depth T of the profile is 0.6 to 0.8 mm. It has come in handy proved the radius R in the area of the acute angle in Transition of the flank section 6 to the base 12 of the Thread profile 0.1 mm to choose.
- the respective flank section 6 forms an undercut 14 in the radial direction 8 and prevents detachment of the indicated casting 64 from the outer surface of the Cylinder liner 10.
- the thread profile shown in Figure 2 differs from that shown in Figure 1 in that the Flank sections 16, 18 different inclinations exhibit.
- the flank section 18 an inclination of 25 ° to the radial direction 8
- the Flank section 16 is generally referred to as trapezoidal Formation of the thread profile achieved.
- a more extreme formation of a trapezoidal Thread profile shows Figure 3, after which a flank section 20 runs in the radial direction 8 and another Flank section 22 as in the foregoing Exemplary embodiments approx. 25 ° to the radial direction 8 is.
- Figure 4 shows a preferred embodiment of a Thread profile, after which a rear in the direction of inclination Flank section 24 is stepped and a radially inner and a radially outer section 26 or 28, which by a third section 30 are connected.
- the radially outer one Section 28 has a smaller angle of inclination radial direction 8 than the radially inner Section 26. This is in the inclination direction 32 of the other flank section 43 an undercut 36 through the outer section 28 formed.
- flank section 34 is again about 25 ° to the radial direction 8 inclined.
- the radially inner one Section 24 has the same inclination.
- the radial outer section 28 extends in the radial direction.
- the third section 30, which the radially inner and the radially outer section 26 and 28 with each other connects, runs essentially in the longitudinal direction, that is concentric to the longitudinal axis, not shown Cylinder liner.
- Figure 5 shows a in the drawing in essential T-shaped formation of a Surface structure.
- the surface structure was in one two step process made by first through the dashed lines structure shown in radial Direction and parallel to each other Flank sections 40, 42 in a pressure rolling process was formed.
- the outer portions of the respective rib-shaped in the radial direction Elevations 44 processed such that a material flow in axial direction 46 of the cylinder liner results, the to the one ultimately shown in the radial direction 8 Undercuts 48 forming structure leads.
- FIG. 6 shows a further embodiment of one in one two-stage pressure rolling process Surface structure, which is essentially Flank sections 50, 52 forming concentric rib-shaped elevations are inclined towards the same axial direction 54. It was in the production of the surface structure according to FIG. 6 from a trapezoidal to a first Machining step manufactured surface structure assumed that by broken lines in FIG 56 is indicated. Through the second processing step became the final one by spinning Surface structure in the radial direction Undercuts 58 forms. The illustrated The surface structure corresponds to that Surface structure according to Figure 4, as in Direction of inclination rear flank section 52 a radial has outer portion 60, the force in the direction of inclination 62 of the flank section 52 Undercut forms and thus effectively detaches the socket caused by the cast.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Mounting Of Bearings Or Others (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
Die Erfindung betrifft eine in Leichtmetalllegierung eingießbare Zylinderlaufbuchse nach dem Oberbegriff des Anspruchs 1.The invention relates to a light metal alloy Pourable cylinder liner according to the preamble of Claim 1.
Es ist bekannt, zum Verklammern von Zylinderlaufbuchsen im Umguss diese mit in Längsrichtung Hinterschnitte bildenden makroskopischen Oberflächenstrukturen zu versehen. Hierdurch wird weitestgehend verhindert, dass sich die Laufbuchse in axialer Richtung vom Zylinderblock löst. Hierfür wurden offene rillenförmige Strukturen in Umfangsrichtung auf die Laufbuchse aufgeschnitten. Bei derartigen Laufbuchsen besteht aber das Problem einer Ablösung des Umgusses in radialer Richtung. Es hat sich gezeigt, dass besonders bei radialer Krafteinwirkungsrichtung Anbindungsprobleme auftreten.It is known to clamp cylinder liners in the Pour them around with undercuts in the longitudinal direction to provide macroscopic surface structures. This largely prevents the The cylinder liner detaches from the cylinder block in the axial direction. For this, open groove-shaped structures in Cut circumferential direction on the liner. at Such liners, however, have the problem of one Detachment of the casting in the radial direction. It has shown that especially with radial Direction of force connection problems occur.
Mit DE-A-1 576 437 wurde vorgeschlagen, auf der Außenseite der einzugießenden Zylinderlaufbuchse eine schuppenförmige Oberflächenstruktur auszubilden, die durch eine überhöhte Schnittgeschwindigkeit bei der spanabhebenden Bearbeitung der Zylinderlaufbuchse erhalten werden könne.With DE-A-1 576 437 it was proposed on the outside the cylinder liner to be cast in a scale-like Form surface structure by an inflated Cutting speed during machining the cylinder liner can be obtained.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Anbindung einer Zylinderlaufbuchse im Umguss zu verbessern.The present invention is based on the object To improve the connection of a cylinder liner in the casting.
Diese Aufgabe wird nach der Erfindung durch eine Zylinderlaufbuchse mit den Merkmalen des Anspruchs 1 gelöst. Die Oberflächenstruktur ist so ausgebildet ist, dass sie in radialer Richtung der Zylinderlaufbuchse gezielt Hinterschnitte bildet.This object is achieved by a Cylinder liner with the features of claim 1 solved. The surface structure is designed that they are in the radial direction of the cylinder liner specifically forms undercuts.
Diese Hinterschnitte führen bei Zylinderlaufbuchsen auf Eisenbasis zu einer zusätzlichen Verklammerung im Umguss und bei Zylinderlaufbuchsen auf Leichtmetallbasis zu einer besseren Verklammerung sowie zur Erhöhung des Anteils metallurgischer Bindung. These undercuts apply to cylinder liners Iron base for an additional clamping in the encapsulation and with cylinder liners based on light metal to one better bracketing and to increase the proportion metallurgical bond.
Diese Hinterschnitte sind durch gezielte spanabhebende Bearbeitung oder auch durch einen Umformvorgang, wie z.B. Drückwalzen, herstellbar. Unregelmäßige Hinterschnitte, wie sie gegebenenfalls durch Sprühen oder Strahlen erzeugt werden können, werden nicht unter dem Begriff einer gezielt hergestellten makroskopischen Oberflächenstruktur subsummiert.These undercuts are targeted by cutting Processing or also by a forming process, such as Spinning rollers, producible. Irregular undercuts, like if necessary generated by spraying or blasting can not be targeted under the term one manufactured macroscopic surface structure subsumed.
Es hat sich gezeigt, dass mit der erfindungsgemäßen Ausbildung von Zylinderlaufbuchsen Anbindungs- und Ablösungsprobleme im Betrieb einer Verbrennungskraftmaschine wesentlich verringert werden konnten.It has been shown that with the invention Training of cylinder liners connection and Replacement problems in the operation of a Internal combustion engine can be significantly reduced could.
Die gezielt hergestellte makroskopische Oberflächenstruktur mit dem rippenförmigen Erhebungen kann in Form von vorzugsweise in Umfangsrichtung erstreckten Nuten oder auch von spiralförmigen Gewindegängen gebildet sein. Die Steigung der Gewindegänge beträgt vorzugsweise 1 bis 4 mm. In besonders vorteilhafter Ausbildung der Erfindung umfasst die Umfangsfläche der Zylinderlaufbuchse eine Kombination von Links- und Rechtsgewindegängen.The deliberately created macroscopic surface structure with the rib-shaped elevations can be in the form of preferably in the circumferential direction extending grooves or spiral Threads are formed. The pitch of the threads is preferably 1 to 4 mm. In a particularly advantageous way Embodiment of the invention includes the peripheral surface of the Cylinder liner a combination of left and right Legal threads.
Es hat sich als zweckmäßig erwiesen, wenn die Tiefe der Oberflächenstruktur 0,3 bis 2 mm, vorzugsweise 0,5 bis 1,2 mm, beträgt.It has proven useful if the depth of the Surface structure 0.3 to 2 mm, preferably 0.5 to 1.2 mm.
Eine bevorzugte Ausführungsform der Zylinderlaufbuchse ist gekennzeichnet durch die Nuten- oder Gewindestruktur bildende Flankenabschnitte, die in einer Längsschnittebene der Zylinderlaufbuchse zwischen 0 und 30°, vorzugsweise zwischen 15 und 25°, und ganz besonders vorteilhafter Weise etwa 25° zur radialen Richtung der Zylinderlaufbuchse geneigt sind.A preferred embodiment of the cylinder liner is characterized by the groove or thread structure forming flank sections in a longitudinal section plane the cylinder liner between 0 and 30 °, preferably between 15 and 25 °, and very particularly advantageously about 25 ° to the radial direction of the cylinder liner are inclined.
Die Flankenabschnitte könnten ansich parallel zueinander verlaufen, d.h. zur radialen Richtung denselben Winkel einschließen. Demgegenüber wird eine Trapezform mit unterschiedlichen Neigungswinkeln zur radialen Richtung bevorzugt. Es wird aber ausdrücklich darauf hingewiesen, dass es als vorteilhaft und daher nach der Erfindung bevorzugt angesehen wird, wenn die beiden eine Erhebung begrenzenden Flankenabschnitte zur selben Richtung geneigt sind. Es ist solchenfalls besser möglich, die mechanischen Kennwerte des Umgusses sowie des Eingussteils durch entsprechende Bemessung der Steigung bzw. des Abstands der Flankenabschnitte zu berücksichtigen, damit maximale radiale und axiale Kräfte aufgenommen werden können, ohne dass es zu einem Bruch oder Abriss im Bereich der Buchse oder des Umgusses kommt.The flank sections could be parallel to each other run, i.e. the same angle to the radial direction lock in. In contrast, a trapezoidal shape with different angles of inclination to the radial direction prefers. However, it is expressly pointed out that it is advantageous and therefore according to the invention is preferred when the two are surveyed limiting flank sections inclined to the same direction are. In this case it is better possible to use mechanical Characteristic values of the casting and the cast part appropriate dimensioning of the slope or the distance of the Flank sections to be taken into account, so maximum radial and axial forces can be absorbed without that there is a break or tear in the area of the socket or the casting.
In Weiterbildung der Erfindung von ganz besonderer Bedeutung weist einer der Flankenabschnitte eine Abstufung mit einem radial inneren und einem radial äußeren Teilabschnitt auf. Durch eine derartige Abstufung wird verhindert, dass sich die Zylinderlaufbuchse bei lokaler Krafteinwirkung in Richtung der Neigung der Flankenabschnitte ablösen kann, da einer der beiden Teilabschnitte in dieser Richtung eine Formschlusshalteverbindung ausbildet. Insoweit hat es sich als vorteilhaft erwiesen, wenn der radial äußere Teilabschnitt des in Neigungsrichtung hinteren Flankenabschnitts einen geringeren Neigungswinkel zur radialen Richtung aufweist, als der radial innere Teilabschnitt.In further development of the invention of a very special One of the flank sections has a gradation with a radially inner and a radially outer Section on. Such a gradation will prevents the cylinder liner from locating Force in the direction of the inclination of the Flank sections can detach because one of the two Sections in this direction Form-locking connection forms. So far it has been proven advantageous if the radially outer Section of the rear in the direction of inclination Flank section a smaller angle of inclination to has radial direction than the radially inner Subsection.
Die beiden Teilabschnitte sind vorzugsweise über einen dritten Teilabschnitt aneinander angebunden.The two sections are preferably one third section tied together.
Nach einem weiteren Erfindungsgedanken kann die Oberflächenstruktur durch einen zweistufigen Bearbeitungsprozess gebildet sein, wobei in einer ersten Stufe eine in radialer Richtung hinterschnittfreie Oberflächenstruktur gebildet wird und in einem anschließenden Umformprozess, z.B. Drückwalzen, Schmieden, die radial äußeren Bereiche der Oberflächenstruktur in axialer Richtung derart verdrängt werden, dass sie in radialer Richtung Hinterschnitte bilden. Der erste Bearbeitungsprozess könnte hierbei auch in Form spanabhebender Bearbeitung erfolgen. Es erweist sich indessen als vorteilhaft, wenn auch der erste Prozess ein Umformprozess, wie Drüchwalzen oder Strangpressen, ist. According to a further inventive idea, the Surface structure through a two-stage Machining process be formed, being in a first Level one undercut-free in the radial direction Surface structure is formed and in one subsequent forming process, e.g. Spinning, forging, the radially outer areas of the surface structure in axial direction are displaced so that they in radial undercuts. The first Machining process could also take shape here machining. It turns out however, as beneficial, albeit the first process Forming process, such as thrush rolls or extrusion.
Es wird ausdrücklich darauf hingewiesen, dass die Anwendung der vorliegenden Erfindung nicht ausschließlich auf Zylinderlaufbuchsen beschränkt ist, sondern dass ansich beliebige, vorzugsweise rotationssymmetrische Eingusskörper im Sinne der Erfindung ausgebildet werden können.It is expressly noted that the application of the present invention is not exclusively based on Cylinder liners is limited, but that itself any, preferably rotationally symmetrical cast body can be trained in the sense of the invention.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der zeichnerischen Darstellung und nachfolgenden Beschreibung bevorzugter Ausführungsformen von Oberflächenstrukturen bei einer erfindungsgemäßen Zylinderlaufbuchse. In der Zeichnung zeigt:
- Figur 1
- eine Oberflächenstruktur in Form eines Gewindeprofils mit zueinander parallelen Flankenabschnitten;
Figur 2- eine weitere Oberflächenstruktur in Form eines Gewindeprofils mit Trapezform bildenden Flankenabschnitten;
- Figur 3
- eine weitere Oberflächenstruktur in Form eines Gewindeprofils mit stark abweichender Neigung der Flankenabschnitte;
Figur 4- eine weitere Oberflächenstruktur in Form eines Gewindeprofils mit je einem abgestuften Flankenabschnitt;
- Figur 5
- eine durch einen Drückwalzprozess hergestellte Oberflächenstruktur in Form eines Nutenprofils; und
Figur 6- eine weitere Ausführungsform einer in einem Drückwalzprozess hergestellten Oberflächenstruktur, in Form eines Nutenprofils.
- Figure 1
- a surface structure in the form of a thread profile with mutually parallel flank sections;
- Figure 2
- a further surface structure in the form of a thread profile with flank sections forming trapezoidal shape;
- Figure 3
- another surface structure in the form of a thread profile with a strongly differing inclination of the flank sections;
- Figure 4
- another surface structure in the form of a thread profile, each with a stepped flank section;
- Figure 5
- a surface structure produced by a pressure rolling process in the form of a groove profile; and
- Figure 6
- a further embodiment of a surface structure produced in a pressure rolling process, in the form of a groove profile.
Figur 1 zeigt eine erste Ausführungsform eines
Gewindeprofils, dessen eine jeweilige rippenförmige Erhebung 2
definierende und begrenzende Flankenabschnitte 4, 6 jeweils
parallel zueinander verlaufen. Beide Flankenabschnitte 4, 6
sind um einen Winkel α von ca. 25° zur radialen Richtung 8
der nur angedeuteten Zylinderlaufbuchse 10 geneigt. Der
Abstand d der Nutflanken 6, 4 zweier benachbarter
Erhebungen 2 beträgt 1,4 mm. Die Steigung S der
Gewindegänge beträgt 2,4 mm und die Tiefe T des Profils
beträgt 0,6 bis 0,8 mm. Es hat sich als zweckmäßig
erwiesen, den Radius R im Bereich des spitzen Winkels im
Übergang des Flankenabschnitts 6 zum Grund 12 des
Gewindeprofils 0,1 mm zu wählen. Figure 1 shows a first embodiment of a
Thread profile, a respective rib-
Der jeweilige Flankenabschnitt 6 bildet einen Hinterschnitt
14 in radialer Richtung 8 und verhindert ein Ablösen des
angedeuteten Umgusses 64 von der äußeren Fläche der
Zylinderlaufbuchse 10.The
Das in Figur 2 dargestellte Gewindeprofil unterscheidet
sich von dem in Figur 1 dargestellten dadurch, dass die
Flankenabschnitte 16, 18 unterschiedliche Neigung
aufweisen. Während der Flankenabschnitt 18 eine Neigung von
ca. 25° zur radialen Richtung 8 aufweist, ist der
Flankenabschnitt 16 nur um ca. 15 bis 22° hierzu geneigt.
Durch die unterschiedliche Neigung der Flankenabschnitte
16, 18 wird eine allgemein als trapezförmig bezeichnete
Ausbildung des Gewindeprofils erreicht.The thread profile shown in Figure 2 differs
differs from that shown in Figure 1 in that the
Eine extremere Ausbildung eines trapezförmigen
Gewindeprofils zeigt Figur 3, wonach ein Flankenabschnitt
20 in radialer Richtung 8 verläuft und ein anderer
Flankenabschnitt 22 wie bei den vorstehenden
Ausführungsbeispielen ca. 25° zur radialen Richtung 8
beträgt.A more extreme formation of a trapezoidal
Thread profile shows Figure 3, after which a
Figur 4 zeigt eine bevorzugte Ausführungsform eines
Gewindeprofils, wonach ein in Neigungsrichtung hinterer
Flankenabschnitt 24 gestuft ausgebildet ist und einen
radial inneren und einen radial äußeren Teilabschnitt 26
bzw. 28 aufweist, welche durch einen dritten Teilabschnitt
30 miteinander verbunden sind. Der radial äußere
Teilabschnitt 28 weist einen geringeren Neigungswinkel zur
radialen Richtung 8 auf, als der radial innere
Teilabschnitt 26. Hierdurch wird in Neigungsrichtung 32 des
anderen Flankenabschnitts 43 ein Hinterschnitt 36 durch den
äußeren Teilabschnitt 28 gebildet.Figure 4 shows a preferred embodiment of a
Thread profile, after which a rear in the direction of
Im dargestellten Fall ist der Flankenabschnitt 34 wiederum
etwa 25° zur radialen Richtung 8 geneigt. Der radial innere
Teilabschnitt 24 weist dieselbe Neigung auf. Der radial
äußere Teilabschnitt 28 verläuft in radialer Richtung. Der
dritte Teilabschnitt 30, welcher den radial inneren und den
radial äußeren Teilabschnitt 26 bzw. 28 miteinander
verbindet, verläuft im wesentlichen in Längsrichtung, also
konzentrisch zur nicht dargestellten Längsachse der
Zylinderlaufbuchse.In the case shown, the
Figur 5 zeigt eine in der zeichnerischen Darstellung im
wesentlichen T-förmige Ausbildung einer
Oberflächenstruktur. Die Oberflächenstruktur wurde in einem
zweistufigen Prozess hergestellt, indem zunächst die durch
unterbrochene Linien dargestellte Struktur mit in radialer
Richtung und parallel zueinander verlaufenden
Flankenabschnitten 40, 42 in einem Drückwalzprozess
gebildet wurde. In einem weiteren Drückwalzprozess wurden
die in radialer Richtung äußeren Abschnitte der jeweiligen rippenförmigen
Erhebungen 44 derart bearbeitet, dass ein Materialfluss in
axialer Richtung 46 der Zylinderlaufbuchse resultiert, der
zu der schlussendlich dargestellten in radialer Richtung 8
Hinterschnitte 48 bildenden Struktur führt.Figure 5 shows a in the drawing in
essential T-shaped formation of a
Surface structure. The surface structure was in one
two step process made by first through the
dashed lines structure shown in radial
Direction and parallel to each
Figur 6 zeigt eine weitere Ausführungsform einer in einem
zweistufigen Drückwalzprozess hergestellten
Oberflächenstruktur, bei denen die im Wesentlichen
konzentrische rippenförmige Erhebungen bildenden Flankenabschnitte 50, 52
zur gleichen axialen Richtung 54 hin geneigt sind. Es wurde
bei der Herstellung der Oberflächenstruktur nach Figur 6
von einer trapezförmigen in einem ersten
Bearbeitungsschritt hergestellten Oberflächenstruktur
ausgegangen, die in der Figur 6 durch unterbrochene Linien
56 angedeutet ist. Durch den zweiten Bearbeitungsschritt
wurde durch Drückwalzen die schlussendliche
Oberflächenstruktur, die in radialer Richtung
Hinterschnitte 58 bildet, erhalten. Die dargestellte
Oberflächenstruktur entspricht insoweit der
Oberflächenstruktur nach Figur 4, als der in
Neigungsrichtung hintere Flankenabschnitt 52 einen radial
äußeren Teilabschnitt 60 aufweist, der bei Krafteinwirkung
in Neigungsrichtung 62 des Flankenabschnitts 52 einen
Hinterschnitt bildet und so wirksam ein Ablösen der Buchse
vom Umguß bewirkt.FIG. 6 shows a further embodiment of one in one
two-stage pressure rolling process
Surface structure, which is essentially
Claims (13)
- A cylinder liner (10) having a radially external surface structure, having rib-shaped elevations (2) extending in the peripheral direction, on the flanks whereof regions with an undercut (14, 48, 58) are made in the radial direction (8) and which serve for anchoring to a light metal alloy (64) which is to be cast to form a cylinder block, characterised in that the rib-shaped elevations (2) are made by cutting or shaping in the manner of a parallelogram shape, a trapezium shape or a T shape in cross-section.
- A cylinder liner according to Claim 1, characterised in that the surface structure is formed by thread turns.
- A cylinder liner according to Claim 2, characterised in that the pitch (S) of the thread turns is 1 to 4 mm.
- A cylinder liner according to Claim 2 or 3, characterised by a combination of left-hand threads and right-hand threads.
- A cylinder liner according to one of the preceding claims, characterised in that the depth (T) of the surface structure is 0.3 to 2 mm.
- A cylinder liner according to one of the preceding claims, characterised by flank portions (4, 6, 16, 18, 20, 22, 24, 34) forming the grooved or threaded structure and inclined by between 0 and 30 degrees with respect to the radial direction (8) along a plane of longitudinal section of the cylinder liner (10).
- A cylinder liner according to Claim 6, characterised in that the flank portions (4, 6, 16, 18, 22, 24, 34) are inclined by between 15 and 25 degrees with respect to the radial direction (8).
- A cylinder liner according to Claim 6 or 7, characterised in that the flank portions (16, 18, 20, 22, 24, 34) define a trapezium shape.
- A cylinder liner according to one or more of the preceding claims, characterised in that one of the flank portions (24) has a step including a radially inner and a radially outer portion part (26 and 28 respectively).
- A cylinder liner according to Claim 9, characterised in that the radially outer portion part (28, 60) of the flank portion (24, 52) which is to the rear as seen in the direction of inclination has a smaller angle of inclination with respect to the radial direction (8) than the radially inner portion part (26).
- A cylinder liner according to Claim 9 or 10, characterised in that both portion parts (26, 28) are joined to one another by way of a third portion part (30).
- A cylinder liner according to one or more of the preceding claims, characterised in that the surface structure is formed by a two-step machining procedure, in which in a first step a surface structure which is free of undercuts in the radial direction (8) is formed and in a subsequent shaping procedure the radially outer regions of the surface structure are displaced in the axial direction (46, 54) such that they form undercuts in the radial direction (8).
- A cylinder liner according to Claim 12, characterised in that the first procedure is also a shaping procedures, such as metal spinning or extrusion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19753017 | 1997-12-01 | ||
DE19753017A DE19753017A1 (en) | 1997-12-01 | 1997-12-01 | Cylinder liner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0919715A2 EP0919715A2 (en) | 1999-06-02 |
EP0919715A3 EP0919715A3 (en) | 1999-12-29 |
EP0919715B1 true EP0919715B1 (en) | 2003-04-02 |
Family
ID=7850234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98122756A Expired - Lifetime EP0919715B1 (en) | 1997-12-01 | 1998-12-01 | Cylinder liner |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0919715B1 (en) |
AT (1) | ATE236352T1 (en) |
DE (2) | DE19753017A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009056919A1 (en) | 2009-12-03 | 2011-06-09 | Mahle International Gmbh | Cylinder liner |
DE112005000002B4 (en) * | 2004-03-08 | 2013-12-24 | Peak Werkstoff Gmbh | Cylinder liner |
US9511467B2 (en) | 2013-06-10 | 2016-12-06 | Ford Global Technologies, Llc | Cylindrical surface profile cutting tool and process |
Families Citing this family (22)
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IT1319899B1 (en) * | 2000-02-10 | 2003-11-12 | Fiat Ricerche | PROCEDURE FOR THE PRODUCTION OF A CYLINDER BLOCK FOR AN INTERNAL COMBUSTION ENGINE. |
JP3976991B2 (en) * | 2000-07-12 | 2007-09-19 | 本田技研工業株式会社 | Metal casting wrap |
FR2814096B1 (en) * | 2000-09-15 | 2002-12-27 | Montupet Sa | METHOD OF MANUFACTURING FOUNDRY PIECES EQUIPPED WITH INSERTS WITH IMPROVED PIECE / INSERT MECHANICAL COHESION, AND INSERT THAT CAN BE USED IN SUCH A PROCESS |
JP4131371B2 (en) | 2002-03-08 | 2008-08-13 | トヨタ自動車株式会社 | Cylinder block manufacturing method |
DE60305691T2 (en) * | 2002-05-13 | 2007-05-31 | Honda Giken Kogyo K.K. | Cast-iron inner limb and method of preparation for it |
KR20050006751A (en) * | 2003-07-10 | 2005-01-17 | 현대자동차주식회사 | cylinder liner |
DE102008048109B4 (en) * | 2008-04-17 | 2015-01-29 | Ks Aluminium-Technologie Gmbh | Method for producing a metallic component and use of a cylinder part as basic body for carrying out the method |
DE102008019933A1 (en) | 2008-04-21 | 2009-10-22 | Ford Global Technologies, LLC, Dearborn | Apparatus and method for preparing a metal surface for applying a thermally sprayed layer |
JP5107837B2 (en) | 2008-09-05 | 2012-12-26 | 富士重工業株式会社 | Cylinder liner, cylinder block, and cylinder liner manufacturing method |
DE102008056743A1 (en) | 2008-11-11 | 2010-05-20 | Ks Aluminium-Technologie Gmbh | Method for coating metallic cast parts provided for casting with a light metal alloy, comprises partially coating the surface of the cast part by powder coating and/or in spraying method with a metal or metal alloy |
DE102009027200B3 (en) * | 2009-06-25 | 2011-04-07 | Ford Global Technologies, LLC, Dearborn | Method for roughening metal surfaces, use of the method and workpiece |
DE102009043566A1 (en) * | 2009-09-30 | 2011-04-07 | Mahle International Gmbh | Cylinder crankcase for use in internal combustion engine of motor vehicle, has cylinder liner or assembly comprising outer shell surface with axial area surrounded by chamber, where lower area of surface is connected with crankcase casting |
DE102009058178B4 (en) * | 2009-12-15 | 2011-11-10 | Ks Aluminium-Technologie Gmbh | Method and tool for surface treatment |
JP2012067740A (en) * | 2010-08-25 | 2012-04-05 | Tpr Co Ltd | Cylinder liner for insert casting |
DE102011086803A1 (en) | 2011-11-22 | 2013-05-23 | Ford Global Technologies, Llc | Repair method of a cylinder surface by means of plasma spraying |
DE102013200912B4 (en) | 2012-02-02 | 2018-05-30 | Ford Global Technologies, Llc | crankcase |
US8726874B2 (en) | 2012-05-01 | 2014-05-20 | Ford Global Technologies, Llc | Cylinder bore with selective surface treatment and method of making the same |
US9079213B2 (en) | 2012-06-29 | 2015-07-14 | Ford Global Technologies, Llc | Method of determining coating uniformity of a coated surface |
US10094325B2 (en) | 2014-01-28 | 2018-10-09 | ZYNP International Corp. | Cylinder liner |
US9382868B2 (en) | 2014-04-14 | 2016-07-05 | Ford Global Technologies, Llc | Cylinder bore surface profile and process |
DE102017109059A1 (en) * | 2017-04-27 | 2018-10-31 | Ks Huayu Alutech Gmbh | Brake drum and method for producing such a brake drum |
DE102020201718A1 (en) | 2020-02-12 | 2021-08-12 | Psa Automobiles Sa | Additively manufactured cylinder liner for a cylinder block of an internal combustion engine and a method for producing such a cylinder liner |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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DE412292C (en) * | 1924-02-12 | 1925-04-18 | Carl Muehlbauer | Cylinder with a ribbed liner enclosed in the cast, especially for internal combustion engines |
DE549560C (en) * | 1929-12-20 | 1932-04-29 | Moteurs Salmson Soc D | Method of fastening cooling jackets cast around the cylinders of internal combustion engines |
DE841246C (en) * | 1950-05-31 | 1952-06-13 | Mahle Kg | Light metal cylinder |
DE1008069B (en) * | 1956-08-22 | 1957-05-09 | Mahle Werk Ges Mit Beschraenkt | Composite cylinder with a light metal cylinder jacket and method of manufacture |
US3165983A (en) * | 1961-09-22 | 1965-01-19 | Reynolds Metals Co | Cylinder block constructions and methods and apparatus for making same or the like |
DE1576437A1 (en) * | 1967-11-17 | 1970-01-22 | Zuendapp Werke Gmbh | Light metal cylinder with cast barrel |
DE1917882A1 (en) * | 1969-04-08 | 1970-10-22 | Holtan Maurice O | Cylinder inner lining |
US4005991A (en) * | 1971-12-29 | 1977-02-01 | Toyo Kogyo Co., Ltd. | Metal made of steel plate and aluminum material |
JPS56127845U (en) * | 1980-02-29 | 1981-09-29 | ||
JPS61107461U (en) * | 1984-12-20 | 1986-07-08 | ||
US5291862A (en) * | 1992-01-09 | 1994-03-08 | Honda Giken Kogyo Kabushiki Kaisha | Cylinder sleeve assembly used in cylinder block for multi-cylinder internal combustion engine, and forming mold for use in production of sand mold for casting the same |
DE4434576A1 (en) * | 1994-08-09 | 1996-02-15 | Ks Aluminium Technologie Ag | Cylinder for internal combustion engine |
DE19634504A1 (en) * | 1996-08-27 | 1997-12-04 | Daimler Benz Ag | Manufacture of blank of a light-metal component to be incorporated into a light-metal casting |
JPH10122034A (en) * | 1996-10-16 | 1998-05-12 | Toyota Motor Corp | Cylinder block for internal combustion engine and manufacture thereof |
-
1997
- 1997-12-01 DE DE19753017A patent/DE19753017A1/en not_active Withdrawn
-
1998
- 1998-12-01 EP EP98122756A patent/EP0919715B1/en not_active Expired - Lifetime
- 1998-12-01 AT AT98122756T patent/ATE236352T1/en not_active IP Right Cessation
- 1998-12-01 DE DE59807723T patent/DE59807723D1/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112005000002B4 (en) * | 2004-03-08 | 2013-12-24 | Peak Werkstoff Gmbh | Cylinder liner |
DE102009056919A1 (en) | 2009-12-03 | 2011-06-09 | Mahle International Gmbh | Cylinder liner |
DE102009056919B4 (en) | 2009-12-03 | 2022-12-29 | Mahle International Gmbh | cylinder liner |
US9511467B2 (en) | 2013-06-10 | 2016-12-06 | Ford Global Technologies, Llc | Cylindrical surface profile cutting tool and process |
Also Published As
Publication number | Publication date |
---|---|
DE59807723D1 (en) | 2003-05-08 |
ATE236352T1 (en) | 2003-04-15 |
EP0919715A3 (en) | 1999-12-29 |
DE19753017A1 (en) | 1999-06-02 |
EP0919715A2 (en) | 1999-06-02 |
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