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EP3649335A1 - Method for producing a piston for an internal combustion engine, piston for an internal combustion engine, piston blank for producing the piston, and casting mold or forging die for producing a piston blank - Google Patents

Method for producing a piston for an internal combustion engine, piston for an internal combustion engine, piston blank for producing the piston, and casting mold or forging die for producing a piston blank

Info

Publication number
EP3649335A1
EP3649335A1 EP18735578.9A EP18735578A EP3649335A1 EP 3649335 A1 EP3649335 A1 EP 3649335A1 EP 18735578 A EP18735578 A EP 18735578A EP 3649335 A1 EP3649335 A1 EP 3649335A1
Authority
EP
European Patent Office
Prior art keywords
piston
producing
internal combustion
combustion engine
blank
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Withdrawn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
EP18735578.9A
Other languages
German (de)
French (fr)
Inventor
Ulrich HENZOLD
Harald Mergler
Christoffer SCHMOLL
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.)
Federal Mogul Nuernberg GmbH
Original Assignee
Federal Mogul Nuernberg 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
Application filed by Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Publication of EP3649335A1 publication Critical patent/EP3649335A1/en
Withdrawn legal-status Critical Current

Links

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
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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
    • F02F3/00—Pistons 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • 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
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/18—Pistons  having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
    • 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
    • F02F3/00—Pistons 
    • F02F2003/0007—Monolithic pistons; One piece constructions; Casting of pistons
    • 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
    • F02F3/00—Pistons 
    • F02F3/0084—Pistons  the pistons being constructed from specific materials

Definitions

  • piston for an internal combustion engine piston blank for the production of the piston and casting mold or forging die for producing a piston blank
  • the invention relates to a method for producing a piston for an internal combustion engine, a piston for an internal combustion engine, a piston blank for the production of the piston and a casting mold or a forging die for
  • JP 58190538 A relates to a forged piston in which the coolant inlet and outlet lines are formed directly in the region of the piston pin bosses. The same applies to the piston according to CN 205297761 U.
  • the invention has the object, on the one hand to provide a method for producing a piston, with the aid of which a piston can be produced in an efficient manner, with regard to the so-called.
  • Fanggrad in other words, the proportion of
  • Thickness direction formed approximately centrally in the same a thickening, which is at least partially aligned with a cooling channel.
  • the described thickening can be used to form thedeffenzu- and -ablanke by an opening leading to the cooling channel, in particular a bore is generated.
  • a thickening can be used to form thedeffenzu- and -ablanke by an opening leading to the cooling channel, in particular a bore is generated.
  • Piston pin hub is formed, as a result in
  • cooling channel is filled with a coolant, such as sodium, and subsequently closed.
  • the piston according to the invention is corresponding to the method described above with at least one thickening
  • Fig. 1 is a bottom view of an inventive
  • Fig. 2 is a sectional view through an inventive
  • a piston blank 10 according to the invention on the one hand two supporting shaft wall sections 18 and on the other two box walls 12, which
  • a thickening 14 is formed, which is so far approximately in the middle in the box wall, as the box wall, at imaginary, continued course, would extend approximately centrally through the thickening 14.
  • the box wall is "bulged" in both directions, inward and outward, about the described thickening
  • the respective thickening is substantially symmetrical with respect to
  • Box wall 12 formed as an axis of symmetry. As can be seen in Fig. 2, in a direction approximately parallel to the piston axis (in Fig. 1 perpendicular to
  • the bore 32 is widened funnel-shaped at its opposite to the cooling channel 38 end.
  • piston pin bosses 16 may protrude or spring back relative to the box walls 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Forging (AREA)

Abstract

The invention relates to a method for producing a piston for an internal combustion engine. As part of the production of a piston blank, at least one box wall is provided with a thickened portion, which is at least partly flush with a cooling channel, in the direction of thickness approximately in the center of the box wall. A piston blank or piston produced in this manner and a casting mold or forging die used in the process are designed in a corresponding manner.

Description

Verfahren zur Herstellung eines Kolbens für einen  Method for producing a piston for a
Verbrennungsmotor, Kolben für einen Verbrennungsmotor, Kolbenrohling zur Herstellung des Kolbens sowie Gießform oder Schmiedegesenk zur Herstellung eines Kolbenrohlings  Internal combustion engine, piston for an internal combustion engine, piston blank for the production of the piston and casting mold or forging die for producing a piston blank
Technisches Gebiet Technical area
Die Erfindung betrifft ein Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor, einen Kolben für einen Verbrennungsmotor, einen Kolbenrohling zur Herstellung des Kolbens sowie eine Gießform oder ein Schmiedegesenk zur The invention relates to a method for producing a piston for an internal combustion engine, a piston for an internal combustion engine, a piston blank for the production of the piston and a casting mold or a forging die for
Herstellung eines Kolbenrohlings. Production of a piston blank.
Auf dem Gebiet der Kolben für Verbrennungsmotoren ist es üblich, zur Kühlung des Kolbens einen weitgehend ringförmigen Kühlkanal auszubilden, der über zumindest einen weitgehend parallel zur Kolbenachse verlaufenden Zulauf mit Kühlöl versorgt wird, das den Kühlkanal an zumindest einem Ablauf verlässt, der ebenfalls im Wesentlichen parallel zur In the field of pistons for internal combustion engines, it is customary to form a largely annular cooling channel for cooling the piston, which is supplied via at least one substantially parallel to the piston axis inlet feed with cooling oil leaving the cooling channel at least one outlet, which is also substantially parallel to
Kolbenachse verläuft. Piston axis runs.
Stand der Technik State of the art
Die JP 58190538 A betrifft einen geschmiedeten Kolben, bei dem die Kühlmittelzu- und -ablaufe unmittelbar im Bereich der Kolbenbolzennaben ausgebildet sind. Gleiches gilt für den Kolben gemäß der CN 205297761 U. JP 58190538 A relates to a forged piston in which the coolant inlet and outlet lines are formed directly in the region of the piston pin bosses. The same applies to the piston according to CN 205297761 U.
Schließlich geht aus der DE 10 2014 222 416 AI ein Finally, from DE 10 2014 222 416 AI a
Aluminiumkolben hervor, bei dem die Kühlmittelzu- und - abläufe außen an den sog. Kastenwänden ausgebildet sind, die sich zwischen den (tragenden) Schaftwänden erstrecken und die Kolbenbolzennaben aufnehmen. Darstellung der Erfindung Aluminum piston out, in which the Kühlmittelzu- and - drains are formed on the outside of the so-called. Box walls that extend between the (supporting) shaft walls and record the piston pin bosses. Presentation of the invention
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, zum einen ein Verfahren zur Herstellung eines Kolbens zu schaffen, mit dessen Hilfe in effizienter Art und Weise ein Kolben herstellt werden kann, der im Hinblick auf den sog. Fanggrad, mit anderen Worten den Anteil des Against this background, the invention has the object, on the one hand to provide a method for producing a piston, with the aid of which a piston can be produced in an efficient manner, with regard to the so-called. Fanggrad, in other words, the proportion of
tatsächlich in den Kühlkanal gelangenden Kühlöls verbessert ist. Ferner soll ein entsprechender Kolben, Kolbenrohling sowie eine Gießform oder ein Schmiedegesenk hierfür is actually improved in the cooling duct reaching cooling oil. Furthermore, a corresponding piston, piston blank and a casting mold or a forging die for this purpose
geschaffen werden. be created.
Die Lösung dieser Aufgabe erfolgt durch das im Anspruch 1 beschriebene Verfahren. The solution of this object is achieved by the method described in claim 1.
Demzufolge wird bereits im Rahmen der Herstellung eines Kolbenrohlings in zumindest einer Kastenwand in Accordingly, in the context of the production of a piston blank in at least one box wall in
Dickenrichtung etwa mittig in derselben eine Verdickung ausgebildet, die zumindest teilweise mit einem Kühlkanal fluchtet. Die beschriebene Verdickung kann zur Ausbildung der Kühlmittelzu- und -ablaufe genutzt werden, indem eine zu dem Kühlkanal führende Öffnung, insbesondere eine Bohrung erzeugt wird. Somit sind wenige Herstellungsschritte, und keine zusätzlichen Komponenten erforderlich, so dass eine einfache und kostengünstige Herstellung ermöglicht wird. Gleichzeitig kann sichergestellt werden, dass während des Betriebs eine ausreichende Menge Kühlöl in den Kühlkanal gelangt. Thickness direction formed approximately centrally in the same a thickening, which is at least partially aligned with a cooling channel. The described thickening can be used to form the Kühlmittelzu- and -ablaufe by an opening leading to the cooling channel, in particular a bore is generated. Thus, few manufacturing steps, and no additional components are required, so that a simple and inexpensive production is possible. At the same time it can be ensured that a sufficient amount of cooling oil enters the cooling channel during operation.
Darüber hinaus wird dadurch, dass die Verdickung in einer Kastenwand und nicht unmittelbar neben einer Kolbenbolzennabe ausgebildet wird, eine unerwünschte Materialansammlung vermieden. Ferner kann in vorteilhafter Weise ein ausreichend großer Abstand zu bewegten Teilen, wie beispielsweise dem Pleuel, eingehalten werden. In addition, the fact that the thickening is formed in a box wall and not immediately adjacent to a piston pin hub, an undesirable accumulation of material is avoided. Furthermore, a sufficiently large distance to moving parts, such as the connecting rod, can be maintained in an advantageous manner.
Hierfür bevorzugte Maßnahmen sind ebenso wie bevorzugte Preferred measures for this are as well as preferred
Weiterbildungen in den weiteren Ansprüchen beschrieben. Zumindest in bestimmten Anwendungsfällen bietet es Vorteile, wenn zumindest eine Kastenwand außen an einer Further developments described in the further claims. At least in certain applications, it offers advantages, if at least one box wall outside of a
Kolbenbolzennabe ausgebildet wird, da hierdurch in Piston pin hub is formed, as a result in
vorteilhafter Weise ausreichend Raum für die Bohrungen geschaffen wird, und gleichzeitig der notwendige Abstand vom Pleuel als bewegtem Teil eingehalten wird. Advantageously, sufficient space for the holes is created, and at the same time the necessary distance from the connecting rod is maintained as a moving part.
Wenngleich im Rahmen des erfindungsgemäßen Verfahren auch die Herstellung eines Leichtmetall- insbesondere Aluminiumkolbens und/oder durch Gießen erfolgen kann, wird derzeit bevorzugt, erfindungsgemäß den Kolbenrohling durch Schmieden und/oder aus Eisen oder Stahl auszuführen. Als Gießverfahren wird Stahl- oder Eisenguss, insbesondere Sphäroguss bevorzugt. Although in the context of the inventive method, the production of a light metal, in particular aluminum piston and / or can be done by casting, is currently preferred, according to the invention perform the piston blank by forging and / or iron or steel. As a casting process steel or iron casting, in particular ductile iron is preferred.
Der Fanggrad kann in vorteilhafter Weise dadurch weiter erhöht werden, dass zumindest eine Verdickung derart The degree of catching can advantageously be further increased by at least one thickening in such a way
mechanisch nachbearbeitet wird, dass zumindest eine is mechanically reworked that at least one
Kühlmittelzu- oder -ablaufbohrung zumindest teilweise Kühlmittelzu- or -ablaufbohrung at least partially
trichterförmig ausgebildet wird. funnel-shaped.
In bestimmten Anwendungsfällen hat es sich ferner als In certain applications, it has also as
vorteilhaft erwiesen, wenn in beiden Kastenwänden jeweils zwei Verdickungen ausgebildet werden, so dass insgesamt vier Zu- oder Ablaufbohrungen vorhanden sind. proven advantageous if in each case two thickenings are formed in two box walls, so that a total of four inlet or outlet holes are available.
Ferner bietet es in bestimmten Situationen Vorteile, wenn der Kühlkanal mit einem Kühlmittel, wie beispielsweise Natrium gefüllt wird, und nachfolgend verschlossen wird. Furthermore, in certain situations, it offers advantages when the cooling channel is filled with a coolant, such as sodium, and subsequently closed.
Der erfindungsgemäße Kolben ist dem vorangehend beschriebenen Verfahren entsprechend mit zumindest einer Verdickung The piston according to the invention is corresponding to the method described above with at least one thickening
versehen, die in vorteilhafter Weise mit Ausnahme einer ggf. darin ausgebildeten Bohrung mechanisch nicht nachbearbeitet ist. Der hierfür verwendete, erfindungsgemäße Kolbenrohling, sowie die erfindungsgemäße Gießform oder das Schmiedegesenk entsprechen den vorangehend erwähnten Merkmalen des erfindungsgemäßen Verfahrens. Dies gilt gleichermaßen für die bevorzugten Ausführungsformen, und es sei erwähnt, dass sämtliche im Zusammenhang mit dem Verfahren, dem Kolben, dem Kolbenrohling, der Gießform und/oder dem Schmiedegesenk erwähnten Merkmale gleichermaßen auf die jeweils anderen Gegenstände dieser Anmeldung anwendbar sind und umgekehrt. provided, which is not mechanically reworked advantageously with the exception of any possibly formed therein bore. The piston blank according to the invention used for this purpose, as well as the casting mold or the forging die according to the invention correspond to the above-mentioned features of the inventive method. This applies equally to the preferred embodiments, and it should be noted that all mentioned in connection with the method, the piston, the piston blank, the mold and / or the forging dies are equally applicable to the other objects of this application and vice versa.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfindung unter Bezugnahme auf die Figuren näher erläutert. Es zeigen: Hereinafter, a preferred embodiment of the invention will be explained in more detail with reference to the figures. Show it:
Fig. 1 eine Unteransicht eines erfindungsgemäßen Fig. 1 is a bottom view of an inventive
Kolbenrohlings, und  Piston blanks, and
Fig. 2 eine Schnittansicht durch einen erfindungsgemäßen Fig. 2 is a sectional view through an inventive
Kolben .  Piston .
Ausführliche Beschreibung einer bevorzugten Ausführungsform der Erfindung Detailed description of a preferred embodiment of the invention
Wie in Fig. 1 zu erkennen ist, weist ein erfindungsgemäßer Kolbenrohling 10 zum einen zwei tragende Schaftwandabschnitte 18 und zum anderen zwei Kastenwände 12 auf, welche die As can be seen in Fig. 1, a piston blank 10 according to the invention on the one hand two supporting shaft wall sections 18 and on the other two box walls 12, which
Kolbenbolzennaben 16 aufnehmen. Wie in der Figur ferner zu erkennen ist, ist an zwei diametral gegenüberliegenden Pick up piston pin bosses 16. As can also be seen in the figure, is at two diametrically opposite
Stellen in der Kastenwand eine Verdickung 14 ausgebildet, die insofern in etwa mittig in der Kastenwand liegt, als die Kastenwand, bei gedachtem, fortgesetztem Verlauf, in etwa mittig durch die Verdickung 14 verlaufen würde. Mit anderen Worten ist die Kastenwand in beide Richtungen, nach innen und außen, "ausgebeult", um die beschriebene Verdickung Make in the box wall a thickening 14 is formed, which is so far approximately in the middle in the box wall, as the box wall, at imaginary, continued course, would extend approximately centrally through the thickening 14. In other words, the box wall is "bulged" in both directions, inward and outward, about the described thickening
auszubilden. Mit anderen Worten ist die jeweilige Verdickung im Wesentlichen bevorzugt symmetrisch bezüglich der train. In other words, the respective thickening is substantially symmetrical with respect to
Kastenwand 12 als Symmetrieachse ausgebildet. Wie in Fig. 2 zu erkennen ist, kann in einer Richtung in etwa parallel zur Kolbenachse (in Fig. 1 senkrecht zur Box wall 12 formed as an axis of symmetry. As can be seen in Fig. 2, in a direction approximately parallel to the piston axis (in Fig. 1 perpendicular to
Zeichenebene, in Fig. 2 von oben nach unten) eine Bohrung 32 erzeugt werden, die, wie in Fig. 2 gezeigt, die Zuführung von Kühlöl 34 aus einer Kühlöldüse 36 in einen Kühlkanal 38 ermöglicht. Um in diesem Zusammenhang den Fanggrad zu Drawing plane, in Fig. 2 from top to bottom) a bore 32 are generated, which, as shown in Fig. 2, the supply of cooling oil 34 from a cooling oil nozzle 36 in a cooling channel 38 allows. In this context, to the degree of catch
erhöhen, ist die Bohrung 32 an ihrem zu dem Kühlkanal 38 entgegengesetzten Ende trichterförmig aufgeweitet. increase, the bore 32 is widened funnel-shaped at its opposite to the cooling channel 38 end.
Aus Fig. 1 ergibt sich ergänzend, dass die Kastenwände 12 in dem gezeigten Fall außen an den Kolbenbolzennaben 16 From Fig. 1 it follows in addition that the box walls 12 in the case shown outside of the piston pin bosses 16th
ausgebildet sind. Die Kolbenbolzennaben 16 können jedoch gegenüber den Kastenwänden 12 vorstehen oder zurückspringen. are formed. However, the piston pin bosses 16 may protrude or spring back relative to the box walls 12.

Claims

Patentansprüche claims
1. Verfahren zur Herstellung eines Kolbens (30) für einen Verbrennungsmotor, bei dem im Rahmen der Herstellung eines Kolbenrohlings (10) in zumindest einer Kastenwand (12) in Dickenrichtung in etwa mittig in derselben eine Verdickung (14) ausgebildet wird, die zumindest 1. A method for producing a piston (30) for an internal combustion engine, wherein in the manufacture of a piston blank (10) in at least one box wall (12) in the thickness direction approximately centrally in the same a thickening (14) is formed which at least
teilweise mit einem Kühlkanal fluchtet.  partially aligned with a cooling channel.
2. Verfahren nach Anspruch 1, 2. The method according to claim 1,
dadurch g e k e n n z e i c h n e t, dass  By doing so, that is
zumindest eine Kastenwand (12) außen an einer  at least one box wall (12) on the outside at one
Kolbenbolzennabe (16) ausgebildet wird.  Piston pin hub (16) is formed.
3. Verfahren nach Anspruch 1 oder 2, 3. The method according to claim 1 or 2,
dadurch g e k e n n z e i c h n e t, dass  By doing so, that is
der Kolbenrohling (10) durch Schmieden oder durch ein Gießverfahren, insbesondere Eisen- oder Stahlguss, hergestellt wird.  the piston blank (10) is produced by forging or by a casting process, in particular iron or cast steel.
4. Verfahren nach einem der vorangehenden Ansprüche, 4. The method according to any one of the preceding claims,
dadurch g e k e n n z e i c h n e t, dass  By doing so, that is
der Kolbenrohling aus Eisen oder Stahl ausgeführt wird.  the piston blank is made of iron or steel.
5. Verfahren nach einem der vorangehenden Ansprüche, 5. The method according to any one of the preceding claims,
dadurch g e k e n n z e i c h n e t, dass  By doing so, that is
zumindest eine Verdickung (14) derart mechanisch nachbearbeitet wird, dass zumindest eine  at least one thickening (14) is mechanically reworked such that at least one
Kühlmittelzu- oder -ablaufbohrung zumindest teilweise trichterförmig ausgebildet wird.  Kühlmittelzu- or -ablaufbohrung is at least partially funnel-shaped.
6. Verfahren nach einem der vorangehenden Ansprüche, 6. The method according to any one of the preceding claims,
dadurch g e k e n n z e i c h n e t, dass  By doing so, that is
in beiden Kastenwänden (12) jeweils zwei Verdickungen (14) ausgebildet werden.  in each case two thickenings (14) are formed in two box walls (12).
7. Verfahren nach einem der vorangehenden Ansprüche, dadurch g e k e n n z e i c h n e t, dass der Kühlkanal mit einem Kühlmittel gefüllt und 7. The method according to any one of the preceding claims, characterized in that the cooling channel filled with a coolant and
nachfolgend verschlossen wird.  subsequently closed.
8. Kolben (30) für einen Verbrennungsmotor mit zumindest einer Kastenwand, in der, in Dickenrichtung in etwa mittig eine Verdickung ausgebildet ist, die mit Ausnahme einer darin ausgebildeten Bohrung (32) mechanisch nicht nachbearbeitet ist. 8. Piston (30) for an internal combustion engine with at least one box wall in which, in the thickness direction approximately in the middle of a thickening is formed, which is mechanically not reworked except for a bore formed therein (32).
9. Kolben nach Patentanspruch 8, 9. Piston according to claim 8,
dadurch g e k e n n z e i c h n e t, dass in zumindest einer Verdickung (14) eine Bohrung (32) ausgebildet ist, die zumindest teilweise trichterförmig gestaltet ist.  characterized in that in at least one thickening (14) has a bore (32) is formed which is at least partially funnel-shaped.
10. Kolbenrohling (10) zur Herstellung eines Kolbens (30) für einen Verbrennungsmotor, mit zumindest einer 10. piston blank (10) for producing a piston (30) for an internal combustion engine, with at least one
Kastenwand (12), in der in Dickenrichtung in etwa mittig zumindest eine Verdickung (14) ausgebildet ist, die zumindest teilweise mit einem Kühlkanal fluchtet.  Box wall (12) in which in the thickness direction approximately centrally at least one thickening (14) is formed, which is at least partially aligned with a cooling channel.
11. Gießform oder Schmiedegesenk zur Herstellung eines 11. casting mold or forging die for producing a
Kolbenrohlings für einen Kolben für einen  Piston blanks for a piston for one
Verbrennungsmotor mit zumindest einer Kontur, die zur Ausbildung zumindest einer Verdickung, in Dickenrichtung in etwa mittig in einer Kastenwand des Kolbenrohlings ausgestaltet ist.  Internal combustion engine with at least one contour, which is designed to form at least one thickening in the thickness direction approximately centrally in a box wall of the piston blank.
EP18735578.9A 2017-07-04 2018-07-02 Method for producing a piston for an internal combustion engine, piston for an internal combustion engine, piston blank for producing the piston, and casting mold or forging die for producing a piston blank Withdrawn EP3649335A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017211335.9A DE102017211335A1 (en) 2017-07-04 2017-07-04 Method for producing a piston for an internal combustion engine, piston for an internal combustion engine, piston blank for producing the piston, and casting mold or forging die for producing a piston blank
PCT/EP2018/067789 WO2019007897A1 (en) 2017-07-04 2018-07-02 METHOD FOR PRODUCING A PISTON FOR A COMBUSTION ENGINE, PISTONS FOR A COMBUSTION ENGINE, PISTON ROLLING FOR PRODUCING THE PISTON, AND GYPSIS OR MOLDING TOOL FOR PRODUCING A PISTON ROLL

Publications (1)

Publication Number Publication Date
EP3649335A1 true EP3649335A1 (en) 2020-05-13

Family

ID=62791757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18735578.9A Withdrawn EP3649335A1 (en) 2017-07-04 2018-07-02 Method for producing a piston for an internal combustion engine, piston for an internal combustion engine, piston blank for producing the piston, and casting mold or forging die for producing a piston blank

Country Status (5)

Country Link
US (1) US11415076B2 (en)
EP (1) EP3649335A1 (en)
CN (1) CN110869601A (en)
DE (1) DE102017211335A1 (en)
WO (1) WO2019007897A1 (en)

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190538A (en) 1982-04-30 1983-11-07 Yamaha Motor Co Ltd Forged piston for internal-combustion engine
JPH06147004A (en) 1992-11-13 1994-05-27 Aisin Seiki Co Ltd Piston for internal combustion engine
CN101031742A (en) * 2004-08-02 2007-09-05 费德罗-莫格尔公司 Piston having centered pin hole and skirt profile
CN201486677U (en) * 2009-05-12 2010-05-26 江门天钇金属工业有限公司 Motor bicycle engine piston
DE102011114105A1 (en) 2010-12-18 2012-06-21 Mahle International Gmbh Piston for an internal combustion engine and method for its production
DE102011002653A1 (en) 2011-01-13 2012-07-19 Federal-Mogul Nürnberg GmbH Piston for use in internal combustion engines
DE102011113800A1 (en) * 2011-09-20 2013-03-21 Mahle International Gmbh Piston for an internal combustion engine and method for its production
US8739755B2 (en) * 2011-10-24 2014-06-03 Mahle International Gmbh Piston for an internal combustion engine
US9216474B2 (en) * 2012-04-24 2015-12-22 Industrial Parts Depot, Llc Two-piece friction-welded piston
CN104797803B (en) * 2012-09-27 2018-02-02 费德罗-莫格尔公司 The piston and piston assembly and its building method that compression height reduces
DE102013218764A1 (en) * 2013-03-15 2014-09-18 Ks Kolbenschmidt Gmbh Two-piece piston for internal combustion engine twice joined
CN204163871U (en) 2014-08-28 2015-02-18 河南柴油机重工有限责任公司 The strong cooling steel piston of a kind of gas engine
WO2016070031A1 (en) * 2014-10-30 2016-05-06 Federal-Mogul Corporation Piston
DE102014222416A1 (en) 2014-11-03 2016-05-04 Mahle Lnternational Gmbh Piston for an internal combustion engine
US10487772B2 (en) * 2014-12-02 2019-11-26 Hitachi Automotive Systems, Ltd. Piston for internal combustion engine, and production method and production device for piston for internal combustion engine
KR20170107473A (en) * 2015-01-30 2017-09-25 페더럴-모걸 엘엘씨 Piston with sealed cooling passage and method of making the piston
DE102015217911A1 (en) * 2015-09-18 2017-03-23 Mahle International Gmbh Piston for an internal combustion engine
CN205297761U (en) 2015-12-21 2016-06-08 潍柴动力股份有限公司 Lubricated piston of reinforcing pinhole
JP2018197539A (en) * 2017-05-25 2018-12-13 日立オートモティブシステムズ株式会社 Piston of internal combustion engine
DE102017213831A1 (en) * 2017-08-08 2019-02-14 Volkswagen Aktiengesellschaft Piston for a reciprocating internal combustion engine and reciprocating internal combustion engine

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CN110869601A (en) 2020-03-06
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US20200158046A1 (en) 2020-05-21
DE102017211335A1 (en) 2019-01-10

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