EP2111323A1 - Procédé de fabrication d'un piston pour un moteur à combustion interne avec un canal de refroidissement, réalisé par assemblage de la partie supérieure du piston et de la partie inférieure du piston à l'aide d'un assemblage par forgeage par compression - Google Patents

Procédé de fabrication d'un piston pour un moteur à combustion interne avec un canal de refroidissement, réalisé par assemblage de la partie supérieure du piston et de la partie inférieure du piston à l'aide d'un assemblage par forgeage par compression

Info

Publication number
EP2111323A1
EP2111323A1 EP07846807A EP07846807A EP2111323A1 EP 2111323 A1 EP2111323 A1 EP 2111323A1 EP 07846807 A EP07846807 A EP 07846807A EP 07846807 A EP07846807 A EP 07846807A EP 2111323 A1 EP2111323 A1 EP 2111323A1
Authority
EP
European Patent Office
Prior art keywords
piston
deformation
region
undercut
recess
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Withdrawn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
EP07846807A
Other languages
German (de)
English (en)
Inventor
Robert Bürgler
Andreas Rehl
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt 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 KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP2111323A1 publication Critical patent/EP2111323A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • 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

Definitions

  • the invention relates to a method for producing a piston of an internal combustion engine, comprising an upper part with at least one arranged behind a ring field recess, wherein the upper part is connectable to a at least one piston shaft and bolt holes having lower part, according to the features of the preamble of claim 1.
  • pistons are produced by making an upper part and a lower part separately from each other and then joining them together.
  • joint connections have been made with a cloth or traction, e.g. by welding or screws for connecting the upper part with the lower part used.
  • These joining compounds such as e.g. Welding or screwdriving have proven themselves in practice, but care must always be taken that the joint areas remain accessible for welding or screwing. This means just in a welding process, that areas of the piston, such as. circumferential and externally accessible recesses, always have to remain open, so that can be welded at all.
  • the invention is therefore based on the object to provide a method for producing a piston, in particular a cooling channel piston, an internal combustion engine, with which the disadvantages described above are avoided.
  • a method for producing a piston in particular a cooling channel piston, an internal combustion engine, with which the disadvantages described above are avoided.
  • the upper part has a receiving region and the lower part has a deformation region (or vice versa), wherein the deformation region is introduced into the receiving region under the action of force and deformed in such a way that the lower part is immovably attached to the upper part.
  • the upper part is connected to the lower part, for example by means of a forged compression connection. Due to the matched shape of the upper part with its receiving area (or its deformation area) and the lower part with its deformation area (or receiving area), these two parts are connected to each other under force, without the need for further parts or requires substantial reworking. That is, with the method according to the invention welding or screwing operations are avoided. After bringing together the two parts of the piston and the implementation and termination of the deformation process, the two parts are immovably connected to each other and the resulting piston only has to be subjected only to a known fine machining.
  • the receiving region has an undercut, wherein the deformation region deforms under the action of force and adapts to the undercut due to its deformation.
  • the deformation region also has an undercut, wherein the receiving region deforms under the action of force and adapts to the undercut as a result of its deformation.
  • the upper part may consist of a high-strength steel (since it faces the combustion pressures and combustion temperatures in the cylinder of the internal combustion engine), while the lower part consists of a low-alloyed steel which has very good cold forming properties.
  • the upper part and the lower part are produced in a forging process, whereas other production methods (such as casting) and any combinations are conceivable.
  • the method according to the invention therefore offers the possibility that different identical or different materials can be combined with one another on the basis of the free choice of materials (all formable materials).
  • materials all formable materials
  • microalloyed steels can be combined with tempered steels or low-alloyed steels.
  • material combinations for the upper part and the lower part which are not weldable such as steel upper part and aluminum lower part.
  • the inventive method for producing a cooling channel piston is applicable, since the radially surrounding and arranged behind the ring field recess is automatically closed by the bringing together of the upper part and lower part and thereby carried out deformation process with a corresponding design of upper part and lower part, without further measures (such as covering the recess with a ring) are required.
  • Pistons in particular cooling channel pistons, which have been produced by the process according to the invention are shown in different figures in the figures, the various variants and their preparation being explained below, without the invention being restricted thereto.
  • FIGS. 1 to 4 a first variant of a cooling channel piston
  • FIGS. 4 to 6 a second variant of a cooling channel piston
  • FIG. 7 to 9 A third variant of a cooling channel piston.
  • FIGS. 1 to 3 show a first variant of a cooling channel piston and its manufacture.
  • FIG. 1 shows the components of a piston after an upper part 10 which has a ring field 11 and a recess 12 arranged behind it as well as a combustion bowl 13 and a lower part 20 have been produced separately from one another.
  • the lower part 20 has in known manner a piston shaft 21 and pin holes 22 for receiving a bolt.
  • the upper part 10 has a downwardly facing end face 14, wherein 15 denotes a lower edge of the ring field 11.
  • a pin 16 as a deformation region, which projects centrally below the combustion chamber trough 13 in the direction of the lower part 20 to be attached later.
  • This pin 16 is thus the deformation region V of the upper part, whereas the lower part 20 has a contact region 23 (for the end face 14) with a front face 24 on its side.
  • the contact area 23 has an unspecified opening for receiving the pin 16, wherein this opening is the receiving area A of the lower part 20.
  • a projection 25 is designated, which is arranged and designed so that it protrudes slightly after the bringing together of the upper part 10 and the lower part 20 in the recess 12.
  • 26 denotes a shoulder of the lower part 20, which corresponds to the lower edge 15 of the ring field.
  • Figure 2 shows that with the aid of a movable tool W from below on the pin 16, a deformation force in the direction of the piston stroke axis is applied, so that initially the end faces 14, 24 come to rest.
  • the recess 12 effectively closed and it may, but not necessarily, a gap S between the lower edge 15 and the shoulder 26 remain.
  • a tool for holding, ie for the bearing fixation of the upper part 10 during the deformation process, is of course available, but not shown here.
  • FIGS 4 to 7 show a further structural design of a cooling channel piston and its production.
  • the upper part 30 has the usual construction, in particular a radially circumferential recess 31, the z. B. can be produced by a turning process.
  • this upper part 30 of the receiving area A is formed by an undercut, which is realized by a first lower end face 32, an inwardly directed web (circulating) 33, a circumferential recess 34 and a second downwardly reported end face 35.
  • the lower part 40 again has an upwardly directed projection (radially encircling) 41 for the closure of the recess 31.
  • the deformation region V of this lower part 40 is realized by a first upwardly directed end face 42, a second upwardly directed end face 43 and a pin 44, which is also directed upward and is cylindrical in shape.
  • the upwardly directed end face of this pin 44 has, for the purpose of better deformability, an indentation pointing inwards in the direction of the piston stroke axis (dot-dashed lines).
  • this geometry of the end face of the pin 44 may also be designed differently.
  • FIG. 5 shows that the pin 44 has been introduced into the receiving area A of the upper part 30 so far that the upper circumferential edge of the first upper end face 42 of the pin 44 comes into abutment against the downwardly directed end face 32 of the upper part 30.
  • Figure 6 wherein it can be seen that the originally cylindrical pin 44 has passed into a deformed pin 44 ' due to the massive forming and has adapted to the shape of the circumferential recess 34 and this completely fills.
  • FIGS. 7 to 9 A third but not conclusive variant is shown in FIGS. 7 to 9, in which again the design and the production method of a cooling channel piston are shown.
  • An upper part 50 again has a recess 51, wherein the receiving portion A of the upper part 50 is formed by a first downwardly directed end face 52, a projection 53 (radially encircling), a second downwardly directed end face 54, wherein the projection 53 at its downwardly facing end has a slope 55.
  • a corresponding lower part 60 again has a projection 61 for closing the recess 51.
  • the deformation region of this lower part 60 is formed by a first upwardly directed end face 62, a second upwardly directed end face 63, and a pin 64, wherein the pin 64 has a circumferential projection 65 and a circumferential recess 66 arranged underneath and recessed.
  • a slope 67 is also introduced, wherein the two bevels 55, 67 correspond with each other and facilitate the subsequent forming process.
  • the pin 64 With further application of force (see Figure 9), the pin 64 is deformed such that it comes with its second upwardly facing end face 63 to the plant to the first downwardly directed end face 52 and the hitherto existing gap disappears.
  • the corresponding bevels 55, 67 it is possible that the projection 53 moves in the direction of the circumferential recess 66 and completely fills this recess after completion of the massive forming.
  • the pin 64 has been deformed such that it not only clawed with the projection 53, but the projection 53 in turn has been reshaped so that it digs into the circumferential projection 65 of the lower part 60.
  • the invention thus provides a manufacturing method for a piston and a piston produced thereafter, in which the upper part and the lower part of the piston by forming, in particular a cold or hot massive forming, are connected to each other, without any welding or screwing the two parts must be performed.
  • the pointing in the direction of the lower part geometry of the upper part and also in the direction of the upper part facing geometry of the lower part is designed so that when existing radially circumferential recess in the upper part of a cooling channel is realized in a particularly advantageous manner.
  • a cooling channel piston is produced with the advantages described above in a particularly advantageous manner by means of the method according to the invention.
  • the upper part has a recess.

Landscapes

  • 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

L'invention concerne un procédé de fabrication d'un piston d'un moteur à combustion interne, qui présente une partie supérieure (10, 30, 50) avec au moins un évidement (12, 31, 51) situé derrière un champ annulaire (11). La partie supérieure (10, 30, 50) peut être connectée à une partie inférieure (20, 40, 60) présentant au moins une tige de piston (21) et des alésages (22) pour des boulons. Conformément à l'invention, la partie supérieure (10, 30, 50) présente une partie de réception (A) et la partie inférieure (20, 40, 60) présente une partie de déformation (V) (ou inversement), et la partie de déformation (V) est insérée sous l'action d'une force dans la partie de réception (A) et se déforme de telle sorte que la partie inférieure (20, 40, 60) soit fixée de manière immuable sur la partie supérieure (10, 30, 50).
EP07846807A 2007-01-25 2007-11-24 Procédé de fabrication d'un piston pour un moteur à combustion interne avec un canal de refroidissement, réalisé par assemblage de la partie supérieure du piston et de la partie inférieure du piston à l'aide d'un assemblage par forgeage par compression Withdrawn EP2111323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710003679 DE102007003679B4 (de) 2007-01-25 2007-01-25 Verfahren zur Herstellung eines Kolbens für eine Brennkraftmaschine mit einem Kühlkanal, realisiert durch Fügen des Kolbenoberteiles und des Kolbenunterteiles mit Hilfe einer Schmiede-Stauchverbindung
PCT/EP2007/010236 WO2008089803A1 (fr) 2007-01-25 2007-11-24 Procédé de fabrication d'un piston pour un moteur à combustion interne avec un canal de refroidissement, réalisé par assemblage de la partie supérieure du piston et de la partie inférieure du piston à l'aide d'un assemblage par forgeage par compression

Publications (1)

Publication Number Publication Date
EP2111323A1 true EP2111323A1 (fr) 2009-10-28

Family

ID=39081590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07846807A Withdrawn EP2111323A1 (fr) 2007-01-25 2007-11-24 Procédé de fabrication d'un piston pour un moteur à combustion interne avec un canal de refroidissement, réalisé par assemblage de la partie supérieure du piston et de la partie inférieure du piston à l'aide d'un assemblage par forgeage par compression

Country Status (3)

Country Link
EP (1) EP2111323A1 (fr)
DE (1) DE102007003679B4 (fr)
WO (1) WO2008089803A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051681B4 (de) * 2010-11-17 2019-09-12 Daimler Ag Verfahren zur Herstellung eines Kühlkanalkolbens
DE102011106554A1 (de) * 2011-07-05 2013-01-10 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102011106556A1 (de) * 2011-07-05 2013-01-10 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
EP2971716A1 (fr) * 2013-03-15 2016-01-20 KS Kolbenschmidt GMBH Piston en acier en deux parties, procédé d'assemblage
US11052895B2 (en) 2016-09-28 2021-07-06 Hitachi Automotive Systems, Ltd. Vehicle control unit
CN113250846B (zh) * 2021-06-18 2022-08-16 中国北方发动机研究所(天津) 一种组合式高强隔热结构活塞

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Publication number Priority date Publication date Assignee Title
DE731632C (de) * 1940-04-19 1943-02-12 Messerschmitt Boelkow Blohm Arbeitskolben mit Bodenplatte fuer Brennkraftmaschinen
FR1454468A (fr) * 1965-08-23 1966-02-11 Perfectionnements aux pistons de moteurs
DE2040906A1 (de) * 1970-08-18 1972-02-24 Nova Werke Ag Verfahren zur Herstellung eines Kolbens fuer Verbrennungsmotoren und nach dem Verfahren hergestellter Kolben
DD90252A3 (de) * 1971-06-16 1972-05-20 Hans Standhardt Verdrehsicherung für Schrauben
DE2425692A1 (de) * 1974-05-28 1975-12-11 Kloeckner Humboldt Deutz Ag Mehrteiliger kolben
DE2554748B2 (de) * 1975-12-05 1978-10-26 Robert Bosch Gmbh, 7000 Stuttgart Kolbenstange mit angeschweißter Gabel und Verfahren zu deren Herstellung
DE2558763C2 (de) * 1975-12-24 1982-01-14 Mahle Gmbh, 7000 Stuttgart Tauchkolben aus gepreßtem Leichtmetall mit eingepreßtem Bodenschutz aus einem anderen Material
GB1600325A (en) * 1978-05-17 1981-10-14 Wellworthy Ltd Pistons
US4364159A (en) * 1980-07-14 1982-12-21 Trw Inc. Method for manufacturing a forged piston with reinforced ring groove
JP3109156B2 (ja) * 1991-07-22 2000-11-13 いすゞ自動車株式会社 断熱ピストン
DE10209168B4 (de) * 2002-03-01 2004-06-03 Ks Kolbenschmidt Gmbh Stahlkolben mit Kühlkanal
DE10311148A1 (de) * 2003-03-14 2004-09-23 Mahle Gmbh Verfahren zur Herstellung eines geschmiedeten Kolbens für einen Verbrennungsmotor
DE102004028459A1 (de) * 2004-06-11 2005-12-29 Mahle Gmbh Gebauter Kolben für einen Verbrennungsmotor

Non-Patent Citations (1)

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Title
See references of WO2008089803A1 *

Also Published As

Publication number Publication date
DE102007003679B4 (de) 2015-05-07
DE102007003679A1 (de) 2008-07-31
WO2008089803A1 (fr) 2008-07-31

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