WO2009079989A2 - Procédé de fixation d'un élément annulaire sur un piston pour un moteur à combustion interne - Google Patents

Procédé de fixation d'un élément annulaire sur un piston pour un moteur à combustion interne Download PDF

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Publication number
WO2009079989A2
WO2009079989A2 PCT/DE2008/002074 DE2008002074W WO2009079989A2 WO 2009079989 A2 WO2009079989 A2 WO 2009079989A2 DE 2008002074 W DE2008002074 W DE 2008002074W WO 2009079989 A2 WO2009079989 A2 WO 2009079989A2
Authority
WO
WIPO (PCT)
Prior art keywords
piston
combustion engine
internal combustion
ring element
fixing
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.)
Ceased
Application number
PCT/DE2008/002074
Other languages
German (de)
English (en)
Other versions
WO2009079989A8 (fr
WO2009079989A3 (fr
Inventor
Rainer Scharp
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 International GmbH
Original Assignee
Mahle International 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
Priority claimed from DE102008038325A external-priority patent/DE102008038325A1/de
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Priority to BRPI0821794-7A priority Critical patent/BRPI0821794A2/pt
Priority to CN2008801221409A priority patent/CN101903632B/zh
Priority to JP2010538331A priority patent/JP2011506831A/ja
Priority to EP08865811A priority patent/EP2229523A2/fr
Publication of WO2009079989A2 publication Critical patent/WO2009079989A2/fr
Publication of WO2009079989A3 publication Critical patent/WO2009079989A3/fr
Anticipated expiration legal-status Critical
Publication of WO2009079989A8 publication Critical patent/WO2009079989A8/fr
Ceased 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004—Filling of continuous seams
    • B23K33/006—Filling of continuous seams for cylindrical workpieces
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/003—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 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F02F2003/0038—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by brazing

Definitions

  • the invention relates to a method for fastening a ring element on a piston for an internal combustion engine according to the preamble of claim 1.
  • the figure shows a piston 1 for an internal combustion engine in a sectional view, which consists of two halves, of which the left half of a section of the piston. 1 90 ° offset to longitudinal section of the piston 1 represents.
  • the piston 1 consists of a piston body 4, with a piston element on the bottom side 5, a ring member 6 is screwed, which carries a top land 7 and a ring portion 8 of the piston 1.
  • the piston base body 4 and the ring element 6 can be made of steel, such as precipitation-hardening, ferritic-peiiitic AFP steel, or of cast iron in the present exemplary embodiment.
  • the piston main body 4 is formed in one piece and has a combustion bowl 10 in the region of the piston head 9.
  • a respective hub support 11, 11 ' two pin bosses 12, 12' each having a hub bore 3, 3 'are integrally formed on the piston head 9 whose end faces 16 are set back relative to the ring member 6 in the direction of the piston longitudinal axis 17.
  • the pin bosses 12, 12 ' are interconnected via shaft elements 13, 13'.
  • shaft elements 13, 13' Between the shaft elements 13, 13 'and the annular element 6 bearing, upper portion of the piston 1, the piston body 4 recesses 18 which are arranged in the present embodiment in the region of the shaft elements 13, 13' of the piston body 4 partially circulating.
  • the piston body 4 forms in the region of the piston head 9 together with the ring member 6 an annular cooling channel 14, which is partly incorporated in the piston body 4 and partly in the ring member 6.
  • the cooling channel 14 is covered by a projection 15 of the piston main body 4 arranged radially outside and at the level of the hub support 11, 11 '.
  • the Anformung 15 is radially outwardly provided with a collar-shaped projection 21, the radial dimension is greater than the radial outer dimension of the ring section 8. It can be seen in the figure, a drain opening 20 of the cooling channel fourteenth
  • soldering material can be applied to the surfaces of the piston base body 4 and the ring element 6 which come into contact with one another before the ring element 6 is screwed onto the piston base 4 and the piston 1 is heated in an oven for liquefying the soldering material.
  • soldering material 26 "and also the protrusion 21 on the piston crown side is coated with soldering material 26.
  • a copper-based or nickel-based, high-melting soldering paste has proven to be suitable in this context the projection 21 to lay a solder wire or a solder foil, which are also made on copper or nickel base.
  • the piston 1 is then heated to a temperature between 900 0 C and 1300 0 C, or in the present embodiment between 1050 0 C and 1250 ° C, wherein the solder material 26 'so far liquefied that it enters the threads of Thread 5 flows. Also located on the surface of the projection 21 solder material 26 liquefies in this case and penetrates between the surface 25 of the Anformung 15 and the lower end face of the ring element. 6
  • the piston 1 is then removed from the oven, wherein in the course of a controlled cooling of the piston 1 at a cooling rate of 5 to 50 ° K / min to a temperature of less than 600 ° C in the thread 5 and between the surfaces of the Anformung 15th and the ring element 6 located solder material 26, 26 'hardens, gives a secure screw connection between the piston body 4 and the ring member 6 and leads to a fixation of the ring member 6 on the Anformung 15.
  • a controlled cooling of the piston 1 at a cooling rate of 5 to 50 ° K / min to a temperature of less than 600 ° C in the thread 5 and between the surfaces of the Anformung 15th and the ring element 6 located solder material 26, 26 'hardens
  • the cooling process takes place in an oxygen-free atmosphere, preferably under vacuum or in a reducing atmosphere.

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 fixation d'un élément annulaire (6) sur un piston (1) pour un moteur à combustion interne, selon lequel : l'élément annulaire (6) est vissé sur le corps de base de piston (4) au moyen d'un filetage (5) ménagé sur la surface extérieure radiale d'une partie (23) du fond de piston (9); une rainure entourante (24), ouverte vers le haut, est formée dans le fond de piston (9) dans la région du filetage (5); la rainure (24) est remplie de produit de brasage (26); le piston (1) est chauffé jusqu'à ce que le produit de brasage (26) se liquéfie et s'écoule entre les filets du filetage (5); puis le piston (1) est refroidi. On obtient ainsi un assemblage vissé fiable entre le corps de base de piston (4) et l'élément annulaire (6). De plus, le conduit de refroidissement (14) est ainsi isolé vis-à-vis des gaz de combustion sous haute pression qui agissent sur le fond de piston (9).
PCT/DE2008/002074 2007-12-20 2008-12-10 Procédé de fixation d'un élément annulaire sur un piston pour un moteur à combustion interne Ceased WO2009079989A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BRPI0821794-7A BRPI0821794A2 (pt) 2007-12-20 2008-12-10 Processo para a fixação de um elemento anular em um êmbolo para um motor de combustão interna
CN2008801221409A CN101903632B (zh) 2007-12-20 2008-12-10 用于在内燃机用活塞上固定环形件的方法
JP2010538331A JP2011506831A (ja) 2007-12-20 2008-12-10 内燃機関に用いられるピストンに環状エレメントを固定するための方法
EP08865811A EP2229523A2 (fr) 2007-12-20 2008-12-10 Procédé de fixation d'un élément annulaire sur un piston pour un moteur à combustion interne

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102007061600 2007-12-20
DE102007061600.9 2007-12-20
DE102008038325.2 2008-08-19
DE102008038352.2 2008-08-19
DE102008038325A DE102008038325A1 (de) 2007-12-20 2008-08-19 Verfahren zum Befestigen eines Ringelementes auf einem Kolben für einen Verbrennungsmotor

Publications (3)

Publication Number Publication Date
WO2009079989A2 true WO2009079989A2 (fr) 2009-07-02
WO2009079989A3 WO2009079989A3 (fr) 2009-09-24
WO2009079989A8 WO2009079989A8 (fr) 2010-09-16

Family

ID=40714718

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/002074 Ceased WO2009079989A2 (fr) 2007-12-20 2008-12-10 Procédé de fixation d'un élément annulaire sur un piston pour un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP2229523A2 (fr)
WO (1) WO2009079989A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2244008A (en) * 1939-06-16 1941-06-03 Gen Motors Corp Piston construction
FR2238372A5 (fr) * 1973-07-19 1975-02-14 Dampers
DE10340292A1 (de) * 2003-09-02 2005-04-14 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE102007044106A1 (de) * 2007-09-15 2009-03-19 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor

Also Published As

Publication number Publication date
WO2009079989A8 (fr) 2010-09-16
EP2229523A2 (fr) 2010-09-22
WO2009079989A3 (fr) 2009-09-24

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