EP2229523A2 - Method for fixing an annular element on a piston for an internal combustion engine - Google Patents
Method for fixing an annular element on a piston for an internal combustion engineInfo
- Publication number
- EP2229523A2 EP2229523A2 EP08865811A EP08865811A EP2229523A2 EP 2229523 A2 EP2229523 A2 EP 2229523A2 EP 08865811 A EP08865811 A EP 08865811A EP 08865811 A EP08865811 A EP 08865811A EP 2229523 A2 EP2229523 A2 EP 2229523A2
- Authority
- EP
- European Patent Office
- 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.)
- Withdrawn
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
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007061600 | 2007-12-20 | ||
DE102008038325A DE102008038325A1 (en) | 2007-12-20 | 2008-08-19 | Method for attaching a ring element on a piston for an internal combustion engine |
PCT/DE2008/002074 WO2009079989A2 (en) | 2007-12-20 | 2008-12-10 | Method for fixing an annular element on a piston for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2229523A2 true EP2229523A2 (en) | 2010-09-22 |
Family
ID=40714718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08865811A Withdrawn EP2229523A2 (en) | 2007-12-20 | 2008-12-10 | Method for fixing an annular element on a piston for an internal combustion engine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2229523A2 (en) |
WO (1) | WO2009079989A2 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2244008A (en) * | 1939-06-16 | 1941-06-03 | Gen Motors Corp | Piston construction |
FR2238372A5 (en) * | 1973-07-19 | 1975-02-14 | Dampers | |
DE10340292A1 (en) * | 2003-09-02 | 2005-04-14 | Mahle Gmbh | Piston for an internal combustion engine |
DE102007044106A1 (en) * | 2007-09-15 | 2009-03-19 | Mahle International Gmbh | Two-piece piston for an internal combustion engine |
-
2008
- 2008-12-10 EP EP08865811A patent/EP2229523A2/en not_active Withdrawn
- 2008-12-10 WO PCT/DE2008/002074 patent/WO2009079989A2/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
WO2009079989A8 (en) | 2010-09-16 |
WO2009079989A3 (en) | 2009-09-24 |
WO2009079989A2 (en) | 2009-07-02 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20100709 |
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AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20161129 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20170630 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20171111 |