EP1360404B1 - Lower part for a multi-piece piston - Google Patents

Lower part for a multi-piece piston Download PDF

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Publication number
EP1360404B1
EP1360404B1 EP01273713A EP01273713A EP1360404B1 EP 1360404 B1 EP1360404 B1 EP 1360404B1 EP 01273713 A EP01273713 A EP 01273713A EP 01273713 A EP01273713 A EP 01273713A EP 1360404 B1 EP1360404 B1 EP 1360404B1
Authority
EP
European Patent Office
Prior art keywords
halves
piece piston
piston
diameter
piston according
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.)
Revoked
Application number
EP01273713A
Other languages
German (de)
French (fr)
Other versions
EP1360404A1 (en
Inventor
Christof Geissler
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7673839&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1360404(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1360404A1 publication Critical patent/EP1360404A1/en
Application granted granted Critical
Publication of EP1360404B1 publication Critical patent/EP1360404B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • the invention relates to a lower part for a built-up piston according to the preamble of claim 1.
  • the invention therefore deals with the problem of providing bases with sufficient strength and not limited shaft length. This problem is solved by a lower part with the characterizing features of claim 1.
  • Advantageous developments are the subject of the dependent claims.
  • electron beam welding linear friction welding, diffusion welding, brazing and the like may be considered as the bonding method for the lower half parts.
  • the steel lower part 1 consists of two forged halves 2 and 3, which are welded together in the parting plane 4 by means of electron beam. It has a shank 5, hubs 6, support areas 7 and a bottom floor 8. In the area laterally and above the hubs weight-reducing recesses 9 are formed by forging.
  • the finished lower part (contours dot-dashed) is later bolted to a piston crown and is used in large engines, such as large ship engines.

Abstract

The aim of the invention is to produce a multi-piece piston with a sufficient shaft length in a simple manner. To achieve this, the lower part (1) has the following characteristics: - it consists of two halves (2,3) that have been welded or soldered together, - the parting plane (4) between the two halves (2,3) runs in the pressure-counter-pressure direction - the two halves (2,3) consist of extruded or forged steel the diameter of the shaft (5) in the direction of the pin is reduced in relation to the diameter of the piston, in the manner a box piston.

Description

Die Erfindung betrifft ein Unterteil für einen gebauten Kolben nach dem Oberbegriff des Anspruchs 1.The invention relates to a lower part for a built-up piston according to the preamble of claim 1.

Bisher wurden derartige Unterteile entweder als Graugußteile oder als gepreßte Aluminiumteile ausgeführt. Neuerdings geht der Trend aus Festigkeitsgründen hin zu geschmiedeten, einstückigen Stahlunterteilen. Diese haben jedoch den Nachteil, daß nur begrenzte Schaftlängen hergestellt werden können.So far, such parts were carried out either as gray cast iron parts or as pressed aluminum parts. For reasons of strength, the trend has recently started towards forged, one-piece steel lower parts. However, these have the disadvantage that only limited shaft lengths can be produced.

Die Erfindung beschäftigt sich daher mit dem Problem, Unterteile mit ausreichender Festigkeit und nicht begrenzter Schaftlänge zur Verfügung zu stellen. Dieses Problem wird gelöst durch ein Unterteil mit den kennzeichnenden Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.The invention therefore deals with the problem of providing bases with sufficient strength and not limited shaft length. This problem is solved by a lower part with the characterizing features of claim 1. Advantageous developments are the subject of the dependent claims.

Als Verbindungsverfahren für die Unterteilhälften kommen in Betracht insbesondere Elektronenstrahlschweißen, Linear-Reibschweißen, Diffusionsschweißen, Hartlöten und dergleichen.In particular, electron beam welding, linear friction welding, diffusion welding, brazing and the like may be considered as the bonding method for the lower half parts.

Die Erfindung wird im folgenden beschrieben anhand eines Ausführungsbeispiels. Es zeigt:

Fig. 1
ein erfindungsgemäßes Unterteil im Querschnitt in Bolzenrichtung
Fig. 2
ein erfindungsgemäßes Unterteil, Querschnitt in der Teilungsebene.
The invention will be described below with reference to an embodiment. It shows:
Fig. 1
an inventive lower part in cross section in the direction of the bolt
Fig. 2
a lower part according to the invention, cross-section in the parting plane.

Das Stahl-Unterteil 1 besteht aus zwei geschmiedeten Hälften 2 und 3, die in der Trennebene 4 miteinander mittels Elektronenstrahl verschweißt sind. Es weist einen Schaft 5, Naben 6, Abstützungsbereiche 7 und einen Unterteilboden 8 auf. Im Bereich seitlich und oberhalb der Naben sind gewichtserleichternde Aussparungen 9 durch Schmieden angeformt.The steel lower part 1 consists of two forged halves 2 and 3, which are welded together in the parting plane 4 by means of electron beam. It has a shank 5, hubs 6, support areas 7 and a bottom floor 8. In the area laterally and above the hubs weight-reducing recesses 9 are formed by forging.

Das fertig bearbeitete Unterteil (Konturen strichpunktiert) wird später mit einem Kolbenboden verschraubt und findet Verwendung in Großmotoren, beispielsweise Schiffs-Großmotoren. The finished lower part (contours dot-dashed) is later bolted to a piston crown and is used in large engines, such as large ship engines.

Claims (5)

  1. Lower part (1) for a multi-piece piston with hubs (6), a shaft (5), and support regions (7), as well as a lower part base (8),
    characterised by the features that
    - the lower part (1) consists of two halves (2, 3) that have been welded or soldered together,
    - the dividing plane (4) between the two halves (2, 3) runs in the pressure-counterpressure direction,
    - the two halves (2, 3) consist of extruded or forged steel,
    - the shaft (5) is reduced in diameter in relation to the piston diameter in the pin direction, in the manner of a box piston.
  2. Lower part for a multi-piece piston according to claim 1,
    characterised in that
    the two halves (2, 3) are connected by means of electron-beam welding, linear friction welding, diffusion welding, or hard soldering.
  3. Lower part for a multi-piece piston according to claim 1 or 2,
    characterised in that
    recesses (9) are present in the region around the hubs (6).
  4. Lower part for a multi-piece piston according to one of the preceding claims,
    characterised in that
    the dividing plane (4) between the two halves (2, 3) corresponds exactly to a plane of symmetry of the lower part.
  5. Method for the production of a lower part for a multi-piece piston according to claim 1,
    characterised in that
    the pin hole is pre-forged.
EP01273713A 2001-02-13 2001-12-05 Lower part for a multi-piece piston Revoked EP1360404B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10106578 2001-02-13
DE10106578A DE10106578A1 (en) 2001-02-13 2001-02-13 Lower part for a built piston
PCT/DE2001/004615 WO2002064963A1 (en) 2001-02-13 2001-12-05 Lower part for a multi-piece piston

Publications (2)

Publication Number Publication Date
EP1360404A1 EP1360404A1 (en) 2003-11-12
EP1360404B1 true EP1360404B1 (en) 2006-07-26

Family

ID=7673839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01273713A Revoked EP1360404B1 (en) 2001-02-13 2001-12-05 Lower part for a multi-piece piston

Country Status (6)

Country Link
US (1) US20040194621A1 (en)
EP (1) EP1360404B1 (en)
JP (1) JP2004518075A (en)
KR (1) KR100823845B1 (en)
DE (2) DE10106578A1 (en)
WO (1) WO2002064963A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008011922A1 (en) * 2008-02-29 2009-09-03 Ks Kolbenschmidt Gmbh Piston for internal combustion engines, produced by means of a multi-orbital friction welding process
DE102009015820A1 (en) * 2009-04-01 2010-10-07 Mahle International Gmbh Piston, for an internal combustion motor, has recesses at the surfaces of the inner supports at the upper and/or lower piston sections which are welded together
DE102009059056A1 (en) * 2009-12-18 2011-06-22 MAHLE International GmbH, 70376 Piston for an internal combustion engine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1772215A (en) * 1923-07-18 1930-08-05 Rudolph R Grant Method of making pistons
US1667202A (en) * 1926-04-22 1928-04-24 Ford Henry Method of manufacturing pistons
DE689073C (en) * 1937-12-07 1940-03-09 Mahle Kg Cross-slotted piston for internal combustion engines
US2244008A (en) * 1939-06-16 1941-06-03 Gen Motors Corp Piston construction
DE749769C (en) * 1940-11-23 1944-12-04 Schmidt Gmbh Karl Process for pressing engine pistons with oil scraper ring groove
US2360642A (en) * 1943-04-15 1944-10-17 Verson Allsteel Press Co Piston and connecting-rod assembly
DE1749812U (en) * 1955-03-23 1957-08-01 Schmidt Gmbh Karl SUBMERGED PISTON FOR COMBUSTION MACHINERY.
JPS6035547B2 (en) * 1978-10-11 1985-08-15 ヤマハ発動機株式会社 casting piston
JPS63140850A (en) * 1986-12-01 1988-06-13 Toyota Motor Corp Engine piston and assembling method thereof
DE3742616A1 (en) * 1986-12-23 1988-07-28 Mahle Gmbh One-part, light and low-frictional light-metal piston for internal-combustion engines
DE3712732C2 (en) * 1987-04-15 1998-04-09 Mahle Gmbh Coolable plunger for internal combustion engines
GB8816981D0 (en) * 1988-07-16 1988-08-17 Jaguar Cars Pistons
GB9006734D0 (en) * 1990-03-28 1990-05-23 Sugden Keith C Improvements in piston rings and seals
DE19846152A1 (en) * 1998-10-07 2000-04-13 Mahle Gmbh Piston with piston base made of forged steel and a cooling channel
DE19902144A1 (en) * 1999-01-20 2000-07-27 Mahle Gmbh Piston composed of components welded or soldered to each other, with lower part of forged steel with shaft extension below boss

Also Published As

Publication number Publication date
DE50110567D1 (en) 2006-09-07
JP2004518075A (en) 2004-06-17
DE10106578A1 (en) 2002-08-22
US20040194621A1 (en) 2004-10-07
EP1360404A1 (en) 2003-11-12
WO2002064963A1 (en) 2002-08-22
KR20030072626A (en) 2003-09-15
KR100823845B1 (en) 2008-04-21

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