DE3713191C1 - Method for the manufacture of a forged head of a two-part piston for internal combustion engines - Google Patents

Method for the manufacture of a forged head of a two-part piston for internal combustion engines

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Publication number
DE3713191C1
DE3713191C1 DE3713191A DE3713191A DE3713191C1 DE 3713191 C1 DE3713191 C1 DE 3713191C1 DE 3713191 A DE3713191 A DE 3713191A DE 3713191 A DE3713191 A DE 3713191A DE 3713191 C1 DE3713191 C1 DE 3713191C1
Authority
DE
Germany
Prior art keywords
piston
collar
ring
section
head
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
Application number
DE3713191A
Other languages
German (de)
Inventor
Emil Ripberger
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
Application filed by Mahle GmbH filed Critical Mahle GmbH
Priority to DE3713191A priority Critical patent/DE3713191C1/en
Application granted granted Critical
Publication of DE3713191C1 publication Critical patent/DE3713191C1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/18—Making machine elements pistons or plungers
    • B21K1/185—Making machine elements pistons or plungers with cooling channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/18—Making machine elements pistons or plungers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
    • 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 
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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

Abstract

The provision of an all-round closed annular cooling oil chamber (5), provided only with inlets and outlets, in the cylinder head in the area behind the piston ring grooves is known. In a forged piston head, this cooling oil chamber (5) is created on the basis of a preforged part in which the annular section (2) is folded out of the piston head (1) plane in the forging process into the required position on the finished piston and in which an annular flange (4) or parts forming this in the final position are already formed on the annular section (2) in its initial position as lower wall end of the cooling oil chamber (5). In the initial form, that is prior to the folding by forging, the annular flange (4) takes the form of individual prongs, which on completion of the deformation bear on one another to form a closed wall. <IMAGE>

Description

Die Erfindung betrifft die Herstellung eines geschmiedeten Kopfes eines zweiteiligen Kolbens für Verbrennungsmotoren nach dem Oberbegriff des Patentanspruchs 1.The invention relates to the manufacture of a forged head two-part piston for internal combustion engines after the Preamble of claim 1.

Ein solches Herstellungsverfahren ist aus der DE-AS 12 10 302 bekannt. Bei einem nach diesem Verfahren hergestellten, einteiligen geschmiedeten Kolben ist es möglich, im Inneren des oberen Kolbenbereiches einen seitlich nach radial außen of­ fenen Ringkanal einzuarbeiten, der dann durch ein Heranbiegen eines radial außen um den offenen Ringka­ nal umlaufenden Wandabschnittes nachträglich ver­ schlossen werden kann. Dies ist jedoch nur unter werkstoffabtragender Bearbeitung des zunächst nach radial außen offenen Ringkanales möglich. Eine solche werkstoffabtragende Bearbeitung ist mit einem in der Praxis unerwünschten Bearbeitungsaufwand verbunden.Such a manufacturing process is from DE-AS 12 10 302 known. It is for a one-piece forged piston made by this process possible inside the top Piston area a laterally radially outward open ring channel, which then through a Bend one radially outside around the open ringka ver circumferential wall section later can be closed. However, this is only under machining of the first after radially open ring channel possible. Such machining is carried out with a Practice associated unwanted processing effort.

Bei Kolben mit derartig geformtem Kolbenkopf ist es darüber hinaus bekannt, den zwischen Naben und Innen­ umfang des Ringabschnittes liegenden an den Kolbenbo­ den angrenzenden etwa ringförmigen Raum etwa in Höhe des freien Endes des Ringabschnittes abzudecken, um dadurch einen in etwa geschlossenen Ringraum zu schaffen, der von Kühlöl durchflossen werden kann. Eine solche Abdeckung ist zum Beispiel aus US-PS 43 77 967 bekannt. Die Abdeckung bewirkt dort ein nach­ träglich aufgebrachtes Deckelteil.It is for pistons with a piston head shaped in this way known also between the hub and inside circumference of the ring section lying on the Kolbenbo the adjacent roughly circular space at about height of the free end of the ring section to cover thereby an approximately closed annulus create that can be traversed by cooling oil. Such a cover is for example from US-PS 43 77 967 known. The cover causes an after sluggishly applied lid part.

Ausgehend von einem gattungsgemäßen Kolben liegt der Erfindung die Aufgabe zugrunde, bei einem geschmiedeten Kolbenkopf für einen zweitei­ ligen Kolben auf wirtschaftlich einfachere Weise, d. h. insbesondere ohne materialabtragende Bearbeitung, einen Shakerraum für Kühlöl in dem Raum zwischen Ringabschnitt und Kolbenbodeninneren zu schaffen.Starting from a generic piston the invention is based on the object for a forged piston head for a second egg lige piston in an economically simpler way, d. H. especially without machining, a shaker room for cooling oil in the space between To create ring section and piston crown interior.

Gelöst wird diese Aufgabe durch ein Herstellungsverfahren nach den Ansprüchen 1-3.This task is solved by a manufacturing process according to claims 1-3.

Die kronenartigen Zacken am freien Umfangsrand des Ringbundes, die der Ringbund an dem Vorformling auf­ weist, erleichtern das Herstellverfahren. Die kronen­ zackenförmige Ausbildung des Ringbundrandes an dem Vorformling dient nämlich dazu, daß bei dem schmiede­ mäßigen Umklappen des Ringabschnittes der Ringbund seine vordefinierte Form nicht verliert. Ohne eine nahezu über die gesamte Höhe gezackten Ringbund be­ stände diese Gefahr dadurch, daß das freie Ende des Ringbundes von einem größeren zu einem kleineren Durchmesser verformt wird, wodurch das von dem inne­ ren Umfangsbereich des Ringbundes eingeschlossene Vo­ lumen erheblich verringert wird.The crown-like spikes on the free peripheral edge of the Ring collar, which the ring collar on the preform on  points, facilitate the manufacturing process. The crowns jagged formation of the ring collar on the The preform is used for the forge moderate folding of the ring section of the ring collar does not lose its predefined shape. Without one be jagged ring collar almost over the entire height this danger would arise if the free end of the Ring bundle from a larger to a smaller one Diameter is deformed, causing the inside ren circumferential area of the collar included Vo lumen is significantly reduced.

Zweckmäßige Ausgestaltungen der Form und des Aufbaus des erfindungsgemäß zur Bildung eines Ölshakerraumes vorgesehenen Ringbundes enthalten die Ansprüche 4- 7.Appropriate configurations of the shape and structure of the invention to form an oil shaker room provided ring collar contain the claims 4- 7.

Da in die als Ölshakerraum auszubildende Ringkammer von dem dem Kolbenboden entgegengesetzten Ende her Kühlöl einzuführen ist, sollten an dem fertigen Kol­ ben in dem Ringbund Öffnungen zum Ein- und Abführen des Kühlöles vorhanden sein. Diese Öffnungen können als Ausnehmungen bereits in dem Ringbund an dem Vor­ formling vorgesehen sein.Since in the ring chamber to be trained as an oil shaker room from the end opposite the piston crown Cooling oil should be introduced, should on the finished Kol ben in the ring collar openings for insertion and removal of the cooling oil. These openings can as recesses already in the ring collar on the front be provided.

Ein Ausführungsbeispiel für den erfindungsgemäß auf­ gebauten geschmiedeten Kolbenkopf ist in der Zeich­ nung dargestellt. Ebenso ist in der Zeichnung der Ab­ lauf des Herstellungsverfahrens ausgehend von einem Schmiedevorformling mit angeformtem Ringbund schematisch wiedergegeben. Es zeigtAn embodiment of the invention built forged piston head is in the drawing shown. Also in the drawing is Ab course of the manufacturing process based on  a forged preform with a molded collar represented schematically. It shows

Fig. 1 einen Längsschnitt durch einen er­ findungsgemäß geschmiedeten Kolben­ rohling, Fig. 1 a longitudinal section through a blank according to the invention it forged piston,

Fig. 2 eine Ansicht auf diesen Kolben von unten, Fig. 2 is a view on this piston from below,

Fig. 3-5 eine schematische Darstellung der Um­ formung des Ringabschnittes mit dem Ringbund in die Endlage am fertigen Kolbenrohling. Fig. 3-5 is a schematic representation of the formation of the ring portion with the collar in the end position on the finished piston blank.

In dem fertigen Kolbenkopfrohling nach Fig. 1 sind jeweils bezeichnet mit 1 der Kolbenboden, 2 der Ring­ abschnitt zur Aufnahme der nicht eingezeichneten Kol­ benringnuten, 3 die Naben und mit 4 der eine Kühlöl­ kammer 5 bildende Ringbund.In the finished piston head blank according to Fig. 1 are each designated 1 the piston crown, 2 the ring section for receiving the not shown Kol benringnuten, 3 the hubs and 4 of a cooling oil chamber 5 forming an annular collar.

Aus dem im Schnitt in Fig. 3 dargestellten Vorform­ ling wird der fertige Kolbenrohling durch Umklappen des Ringabschnittes 2 erzeugt. Der aus einzelnen zacken­ förmig gestalteten Segmenten aufgebaute Ringbund 4 behält beim Umklappen des Ringabschnittes 2 zunächst seine Lage relativ zu dem Ringabschnitt 2. Durch das Verbringen des Ringbundes auf einen kleineren Durch­ messer schließen sich allmählich die Lücken zwischen den einzelnen Zacken. Hat der Ringabschnitt 2 seine in Fig. 5 gezeigte Endlage erreicht, wird in einem abschließenden Schmiedearbeitsgang der Ringbund 4 in seine endgültige Lage umgeformt, d. h. geklappt, in der er zum Kolbenboden hin geneigt ist.From the preform shown in section in FIG. 3, the finished piston blank is produced by folding over the ring section 2 . The ring collar 4 , which is constructed from individual jagged segments, initially retains its position relative to the ring section 2 when the ring section 2 is folded over. By moving the collar to a smaller diameter, the gaps between the individual teeth gradually close. When the ring section 2 has reached its end position shown in FIG. 5, the ring collar 4 is formed into its final position, ie folded, in a final forging operation, in which it is inclined towards the piston crown.

Die Ausnehmungen 6 und 7 zur Zu- und Abfuhr von Kühl­ öl in die Kühlölkammer 5 sind bereits bei dem Ring­ bund an dem Vorformling in Fig. 3 vorgesehen. Auf diese Weise können diese Ausnehmungen ohne das Erfor­ dernis einer materialabtragenden Bearbeitung ange­ bracht werden.The recesses 6 and 7 for supplying and removing cooling oil into the cooling oil chamber 5 are already provided in the ring collar on the preform in FIG. 3. In this way, these recesses can be made without the need for material-removing machining.

Der Ringbund 4 muß nicht am äußersten Ende des Ring­ abschnittes 2 angeformt sein. Er kann an diesem viel­ mehr auch näher zum Kolbenboden 2 angebracht sein, wenn nur gewährleistet ist, daß noch eine Kühlölkam­ mer 5 sich ausbilden kann.The ring collar 4 does not have to be molded section 2 at the extreme end of the ring. He can be attached to this much more closer to the piston crown 2 , if only it is ensured that a Kühlölkam mer 5 can form.

Claims (7)

1. Verfahren zur Herstellung eines geschmiedeten Kopfes eines zweiteiligen Kolbens, dessen fertiger Kolbenkopf einen den Verbrennungsga­ sen ausgesetzten Kolbenboden, einen radial außen in diesen Boden übergehenden, die Kolbenringnuten aufnehmenden Ringabschnitt und mit in Abstand zu dem Ringabschnitt von dem Boden einstückig ausge­ henden Naben zur Aufnahme eines den Kolbenschaft tragenden Kolbenbolzens und einen Kühlölraum besitzen soll, dessen Ring­ abschnitt (2) in einem Winkel zwischen 0 Grad und kleiner als 90 Grad zur Ebene des Kolbenbodens geneigt ist und bei dem anschließend der Ringab­ schnitt (2) in seine endgültige Lage umgebogen wird, dadurch gekennzeichnet, daß der Ringbund (4) in dem freien Umfangsendbe­ reich des noch nicht umgebogenen Ringabschnittes (2) an dessen nach dem Umbiegen zum Kolbenkopfin­ neren zu liegen kommenden Seite angeformt ist, wobei er in Kolbenkopfachsrichtung hinterschnitt­ frei ist und eine Höhe besitzt, die in etwa dem jeweiligen radialen Abstand zwischen dem Innenum­ fang des fertig geformten Ringabschnittes (2) und den Naben (3) entspricht, daß er an seinem freien Umfangsende kronenartig gezackt ist und nach dem Umbiegen den unteren Abschluß des Kühlraumes bil­ det.1. A method for producing a forged head of a two-part piston, the finished piston head of which has a piston crown which is exposed to the combustion gas, a radially outer transition into this base, the piston ring grooves receiving ring section and with spaced apart from the ring section from the bottom of the hub for receiving one is to have the piston shaft supporting the piston pin and a cooling oil chamber, whose ring portion (2) at an angle between 0 degrees and smaller than 90 degrees is inclined to the plane of the piston crown and cut in which subsequently the Ringab (2) in its final position bent is , characterized in that the annular collar ( 4 ) is formed in the free circumferential region of the not yet bent ring section ( 2 ) on its side which lies after bending over to the piston head interior, wherein it is undercut free in the piston head direction and has a height, the roughly the respective radial distance d between the inner circumference of the finished ring section ( 2 ) and the hubs ( 3 ) corresponds to the fact that it is serrated at its free peripheral end and after bending the lower end of the cooling space bil det. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Ringbund (4), zumindest wenn der Ringab­ schnitt an den er angeformt ist, in seiner nicht umgebogenen Lage gegenüber der Ebene des Kolben­ bodens geneigt ist, bei einer Zwischen- oder der Endlage des umgebogenen Ringabschnittes (2) rela­ tiv zu dem Ringabschnitt (2) in Richtung des Kol­ benbodens (1) in einem solchen Maße verformt wird, daß bei der Endlage des Ringabschnittes (2) der Ringbund (4) gegenüber der Ebene des Kolben­ bodens (1) zumindest parallel oder so geneigt ist, daß dessen freier radial innen liegender Um­ fangsrand näher an den Kolbenboden (1) zu liegen kommt als der radial außen in den Ringabschnitt (2) übergehende Abschnitt des Ringbundes (4).2. The method according to claim 1, characterized in that the collar ( 4 ), at least when the Ringab section to which it is molded, is inclined in its non-bent position relative to the plane of the piston bottom, at an intermediate or the end position of the bent ring section ( 2 ) rela tively to the ring section ( 2 ) in the direction of the Kol benboden ( 1 ) is deformed to such an extent that in the end position of the ring section ( 2 ) the collar ( 4 ) relative to the plane of the piston bottom ( 1 ) is at least parallel or inclined in such a way that its free radially inner circumferential edge comes closer to the piston crown ( 1 ) than the radially outer section of the ring collar ( 4 ) which merges into the ring section ( 2 ). 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die zur Bildung der Kronenzacken erforderli­ chen Ausnehmungen über nahezu die gesamte Höhe des Ringbundes (4) eingeformt sind. 3. The method according to claim 1 or 2, characterized in that the recesses required for the formation of the crown prongs are formed over almost the entire height of the collar ( 4 ). 4. Geschmiedeter Kopf eines zweiteiligen Kolbens für Verbrennungsmotoren, welcher nach einem der Verfahren der Ansprüche 1-3 hergestellt ist, dadurch gekennzeichnet, daß an dem Ringabschnitt (2) ein einstückig an das untere freie Umfangsende dieses Ringab­ schnitts angeformter Ringbund (4) zur Bildung ei­ nes Shakerraumes für von unten an den Kolbenboden (1) angespritztes Kühlöl mit Abstand vom Kolben­ boden (1) nach radial innen ragt, der aus einzel­ nen auf seinem Umfang aneinanderliegenden Segmen­ ten besteht.4. Forged head of a two-part piston for internal combustion engines, which is made according to one of the methods of claims 1-3, characterized in that on the ring portion ( 2 ) a one-piece on the lower free peripheral end of this Ringab section molded ring collar ( 4 ) to form egg nes shaker chamber for cooling oil injected from below onto the piston crown ( 1 ) at a distance from the piston crown ( 1 ) protrudes radially inwards, which consists of individual segments adjacent to one another on its circumference. 5. Geschmiedeter Kopf eines zweiteiligen Kolbens nach Anspruch 4, dadurch gekennzeichnet, daß die einzelnen Segmente in der Umfangsebene des Ringbundes (4) die Form eines jeweils etwa gleichschenkligen Dreiecks mit radial nach innen verlaufender Spitze besitzen.5. Forged head of a two-part piston according to claim 4, characterized in that the individual segments in the circumferential plane of the collar ( 4 ) have the shape of an approximately isosceles triangle with a radially inwardly extending tip. 6. Geschmiedeter Kopf eines zweiteiligen Kolbens nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der innere Rand des Ringbundes (4) zum Kol­ benboden hin einen geringeren Abstand aufweist als der Ringbund (4) an seinem in den Ringab­ schnitt (2) einlaufenden Bereich besitzt.6. Forged head of a two-part piston according to claim 4 or 5, characterized in that the inner edge of the collar ( 4 ) to Kol benboden has a smaller distance than the collar ( 4 ) at its section in the Ringab ( 2 ) entering area owns. 7. Geschmiedeter Kopf eines zweiteiligen Kolbens nach einem der vorhergehenden Ansprüche 4-6, dadurch gekennzeichnet, daß der Ringbund (4) in Achsrichtung des Kolben­ kopfes verlaufende Öffnungen (6, 7) mit aus­ schließlich geschmiedeten Begrenzungswänden auf­ weist.7. Forged head of a two-part piston according to one of the preceding claims 4-6, characterized in that the annular collar ( 4 ) in the axial direction of the piston head openings ( 6, 7 ) with finally forged boundary walls.
DE3713191A 1986-12-24 1987-04-18 Method for the manufacture of a forged head of a two-part piston for internal combustion engines Expired DE3713191C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3713191A DE3713191C1 (en) 1986-12-24 1987-04-18 Method for the manufacture of a forged head of a two-part piston for internal combustion engines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3644548 1986-12-24
DE3713191A DE3713191C1 (en) 1986-12-24 1987-04-18 Method for the manufacture of a forged head of a two-part piston for internal combustion engines

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DE3713191C1 true DE3713191C1 (en) 1988-07-14

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19943945A1 (en) * 1999-09-14 2001-03-22 Federal Mogul Wiesbaden Gmbh Piston head
EP1452250A2 (en) * 2003-03-01 2004-09-01 KS Kolbenschmidt GmbH Method of manufacturing a cooling duct piston with deformable flange
EP1611975A1 (en) * 2004-06-30 2006-01-04 KS Kolbenschmidt GmbH Method of manufacturing a piston with a cooling channel for an internal combustion engine
WO2006063710A1 (en) * 2004-12-16 2006-06-22 Cdp Bharat Forge Gmbh Method for producing rotationally symmetrical, undercut contours
DE102005021428A1 (en) * 2005-05-10 2006-11-16 Mahle International Gmbh Process to manufacture a forged piston by formation of a collar and folding over cooling channel
WO2007082564A1 (en) * 2006-01-21 2007-07-26 Ks Kolbenschmidt Gmbh Cooling duct piston for an internal combustion engine
DE102007027337A1 (en) * 2007-06-14 2008-12-18 Ks Kolbenschmidt Gmbh Internal-combustion engine's cooling channel piston manufacturing method, involves molding piston blank from steel material, and additionally deforming rotating flange such that flange contacts contact surface of piston blank
US8011288B2 (en) 2005-09-17 2011-09-06 Ks Kolbenschmidt Gmbh Piston, especially cooling channel piston, comprising three friction-welded zones
US8485088B2 (en) 2006-07-07 2013-07-16 Ks Kolbenschmidt Gmbh Cooling channel piston for an internal combustion engine and method for the production thereof
DE102012224231A1 (en) * 2012-12-21 2014-06-26 Ks Kolbenschmidt Gmbh Method for producing a piston and associated piston
DE102008046115B4 (en) * 2007-09-18 2016-12-22 Art Metal Mfg. Co., Ltd. Method for producing a piston for an internal combustion engine
US11162453B2 (en) 2016-05-04 2021-11-02 Ks Kolbenschmidt Gmbh Piston

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1210302B (en) * 1959-12-02 1966-02-03 Karl Schmidt Ges Mit Beschraen Method of manufacturing pistons with a coolant space in the piston crown
DE2543478A1 (en) * 1975-09-30 1977-04-07 Elsbett L PISTONS FOR COMBUSTION MACHINES, ESPEC. DIESEL ENGINES
GB2050564A (en) * 1979-05-30 1981-01-07 Bayerische Motoren Werke Ag Internally Cooled Piston for a Reciprocating Internal Combustion Engine
US4377967A (en) * 1981-03-27 1983-03-29 Mack Trucks, Inc. Two-piece piston assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1210302B (en) * 1959-12-02 1966-02-03 Karl Schmidt Ges Mit Beschraen Method of manufacturing pistons with a coolant space in the piston crown
DE2543478A1 (en) * 1975-09-30 1977-04-07 Elsbett L PISTONS FOR COMBUSTION MACHINES, ESPEC. DIESEL ENGINES
GB2050564A (en) * 1979-05-30 1981-01-07 Bayerische Motoren Werke Ag Internally Cooled Piston for a Reciprocating Internal Combustion Engine
US4377967A (en) * 1981-03-27 1983-03-29 Mack Trucks, Inc. Two-piece piston assembly

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6435077B1 (en) 1999-09-14 2002-08-20 Federal-Mogul Wiesbaden Gmbh Piston head
DE19943945A1 (en) * 1999-09-14 2001-03-22 Federal Mogul Wiesbaden Gmbh Piston head
EP1452250A2 (en) * 2003-03-01 2004-09-01 KS Kolbenschmidt GmbH Method of manufacturing a cooling duct piston with deformable flange
EP1452250A3 (en) * 2003-03-01 2005-09-21 KS Kolbenschmidt GmbH Method of manufacturing a cooling duct piston with deformable flange
EP1611975A1 (en) * 2004-06-30 2006-01-04 KS Kolbenschmidt GmbH Method of manufacturing a piston with a cooling channel for an internal combustion engine
WO2006063710A1 (en) * 2004-12-16 2006-06-22 Cdp Bharat Forge Gmbh Method for producing rotationally symmetrical, undercut contours
CN100475383C (en) * 2004-12-16 2009-04-08 Cdp印地冶炼厂有限责任公司 Method for producing rotationally symmetrical undercut contours
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DE102008046115B4 (en) * 2007-09-18 2016-12-22 Art Metal Mfg. Co., Ltd. Method for producing a piston for an internal combustion engine
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