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EP2888466A1 - Assemblage d'un piston en acier en deux parties et procédé d'assemblage - Google Patents

Assemblage d'un piston en acier en deux parties et procédé d'assemblage

Info

Publication number
EP2888466A1
EP2888466A1 EP13752639.8A EP13752639A EP2888466A1 EP 2888466 A1 EP2888466 A1 EP 2888466A1 EP 13752639 A EP13752639 A EP 13752639A EP 2888466 A1 EP2888466 A1 EP 2888466A1
Authority
EP
European Patent Office
Prior art keywords
piston
joining process
joining
wall
support
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Withdrawn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
EP13752639.8A
Other languages
German (de)
English (en)
Inventor
Eberhard Weiss
Emmerich Ottliczky
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 EP2888466A1 publication Critical patent/EP2888466A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/01—Pistons; Trunk pistons; Plungers characterised by the use of particular materials

Definitions

  • the invention relates to a piston for an internal combustion engine and to a method for producing a piston for an internal combustion engine, according to the features of the respective preamble of the independent claims.
  • pistons for internal combustion engines consist of at least two parts. These two parts are on the one hand a Ringteii, u.a. forms the top land and at least one, preferably comprises two or more annular grooves, and a base part, which forms the Kolbenbotzenbohrung, the piston hubs, the piston skirt and the like in a conventional manner. These two parts are assembled in a suitable form. The ring element and the base part are designed so that after their assembly, a cooling channel is formed.
  • the piston may include a combustion bowl.
  • DE 10 2010 056 220 A1 discloses a welded connection for the production of a piston from at least two individual parts. However, the correct position mounting the piston parts is very expensive here, as a positioning missing.
  • the invention is therefore based on the object to provide a piston of an internal combustion engine, in particular a cooling channel piston, which can be made simple, but at the same time with high precision, without complex post-processing are required after joining the two components.
  • the two components ring element and base part, also called lower part
  • a joint connection in particular a cohesive joint connection, such as soldering or welding
  • the present invention relates to a piston, in particular a cooling channel piston for an internal combustion engine, comprising a piston lower part and a piston upper part, which are connected in a joining process to form a piston, wherein the piston upper part has at least one annular field and an inner wall, wherein according to the invention it is provided that the piston lower part radially encircling inclined surface on the piston upper part facing the end, which causes a centering cooperating with the inner wall of the piston upper part in the joining process of the piston parts.
  • the piston upper part can be designed so that it includes the later ring field and the later Muldenrand Scheme.
  • This piston upper part is designed in an annular manner with an inverted U-shaped profile with different leg lengths.
  • the outer longer leg later forms the ring field.
  • the later bowl edge area is formed by the shorter inner leg.
  • the invention provides that the lower piston part has at least one sliding surface, which cooperates in the joining process with the inner wall of the piston upper part.
  • This at least one Gleitfikiee offers the advantage that low forces are spent in the joining of piston lower part and upper piston part.
  • the invention provides that at least one support for the formation of a gap is provided in the region of at least one joining seam.
  • the at least one edition creates a gap with defined dimensions.
  • the gap adjacent to the support serves to receive soldering material.
  • a depot in particular for receiving solder material is provided.
  • the gap forms a reservoir for process media. It is advantageous that this reservoir can be specifically filled, for example, before the joining process.
  • the process medium for example, solder material in the correct dosage at the site of action exists.
  • the excess soldering material including portions of the reservoir, can be removed.
  • Characteristic of the piston is that on the piston upper part a circumferential collar as a limitation in the joining process in conjunction with a support is provided.
  • the exact subsequent (height) - a ′ of the piston is defined via the collar.
  • a "collapse" of the piston unit over the boundary, formed by the collar and the support, is only possible if a definable limit force is exceeded. The intended limitation can not be exceeded in the joining process according to the invention.
  • the collar is removed after completion of the joining process. Possible handling marks on the collar of the joining process are removed by removing the collar. Also, the exact dimension of the piston can be adjusted by removing the collar. The collar serves as an aid to finding the exact position of piston lower part and upper piston part in the joining process to each other and can therefore be removed after the joining.
  • the invention provides that the piston upper part forms at least one ring field after the joining process.
  • the ring field is used in a known manner for receiving piston rings.
  • the inventive method for producing a piston, in particular cooling channel piston for an internal combustion engine comprises the following steps:
  • a centering increases the process reliability when joining the piston lower part and upper piston part to a piston.
  • the piston components "find" themselves in the correct position relative to each other as they move towards each other Piston base and piston upper slide together to the correct end position to complete the joining process is above the midpoint in the direction of the piston stroke axis of the piston lower part.
  • at least one support for the joining process is removed in at least one further method step. The support is used to find a defined position of the lower part of the piston to the upper part of the piston and can therefore be removed after the joining process has been completed.
  • the two components to be assembled can consist of the same or different material.
  • they may be used in the same or different ways ⁇ e.g. Forging, casting or the like).
  • FIG. 1 is a sectional view of the piston of a first embodiment prior to joining
  • Fig. 6 is a sectional view of a piston before the closure of the groove
  • Fig. 7 a sectional view of the finished piston.
  • FIGS. 1 to 3 show a first exemplary embodiment of a piston 1 according to the invention
  • FIGS. 4 to 7 show a further exemplary embodiment of a piston 1 according to the invention
  • piston 31 For the same elements the same reference numerals are used for both embodiments.
  • top, bottom, left, right, front, back, etc. refer exclusively to the example representation and position of the device and other elements selected in the respective figures. These terms are not intended to be limiting, that is to say that different positions and / or mirror-symmetrical design or the like may change these references.
  • the piston 1 shows a piston 1, consisting of a piston lower part 2 and a piston upper part 3, designed as a ring, before joining.
  • the piston upper part 3 has a support 4. In addition, it may have a depot 5, which may serve for example for receiving solder paste.
  • the lower piston part 2 has a radially peripheral oblique surface 6 on the outer circumference. With F, the joining direction for joining piston lower part 2 and upper piston part 3 is marked.
  • a radially encircling inner wall 7 of the piston upper part 3 slides past radially circumferential sliding surfaces 8 of the piston lower part 2.
  • the annular piston upper part 3 has a radiaiumstedden to the piston center oriented collar 14.
  • a radially encircling support 15 In the upper end region of the piston lower part 2 is a radially encircling support 15.
  • the joining process is completed when the lower portion of the inner wall 7 comes to rest on the inclined surface 6 and the collar 14 comes to rest on the support 15.
  • the inclined surface 6 assumes the function of a centering device during the joining process.
  • auxiliaries such as solder paste.
  • the inclusion of materials or materials that serve for subsequent cohesive connection between the piston lower part 2 and upper piston part 3, in the depot 5 is conceivable.
  • FIG. 2 shows the later piston 1 after the joining process of piston lower part 2 and piston upper part 3. It can be clearly seen that the inner wall 7 of the annular piston upper part 3 rests against the radially encircling inclined surface 6 of the piston lower part 2 has come to the plant. Furthermore, the radially encircling collar 14 of the upper piston part 3 has come to rest on the likewise radially encircling support 15 of the Kofbenunterteiis 2. By joining the lower piston part 2 with the piston upper part 3, a radially encircling cavity has formed, which can serve as a cooling channel 13. Furthermore, the lower piston part 2 has a trough 11, in which the combustion process takes place during operation of the internal combustion engine.
  • a piston lower part 32 in turn has a radially encircling inclined surface 6.
  • the annular upper piston part 33 has in profile the shape of an inverted "U" with unequal legs 19, 20.
  • the longer, outer leg 19 is used after the joining process to form the ring field 16.
  • the shorter leg 20 is used after the joining process for Forming a Muldenrandrings 12.
  • the piston lower part 32 has in the region of a trough formed after the joining process 11 a radially encircling web 21.
  • a sliding surface 8 and an inclined surface 6 are formed on the upper outer circumference of the piston lower part 32.
  • FIG. 5 shows the piston 31 after the joining process.
  • an optional support 9 for forming a soldering gap.
  • a centering 10 of the piston upper part 33 on the piston lower part 32 is carried out as already described in the first embodiment, by the interaction of the inclined surface 6 with the lower end of the inner wall 7.
  • a soldering or welding connection can be provided here.
  • the finished piston 31 is shown in FIGS. 6 and 7. It can be seen that the centering 10 has been preserved after processing. In the processing of the edge region of the trough 11, the support 9 for the soldering gap, if it was present, is removed. The joint seams 17 between piston lower part 32 and upper piston part 33 can be seen. A ring field 6 was also worked out. The trough 11 has received its functional profile.
  • the joining method according to the invention for a piston lower part and a piston upper part is not limited to the exemplary embodiments described here.

Landscapes

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

Abstract

La présente invention concerne un piston (1, 31), en particulier un piston à canal de refroidissement destiné à un moteur à combustion interne, qui comprend une partie de piston inférieure (2, 32) et une partie de piston supérieure (3, 33) qui sont réunies dans une opération d'assemblage pour former le piston (1, 31). La partie de piston supérieure (3, 33) comporte au moins une face annulaire (16) ainsi qu'une paroi intérieure (7). Selon l'invention, la partie de piston inférieure (2, 32) comporte à son extrémité située face à la partie de piston supérieure (3, 33) une surface oblique (6) radiale périphérique qui, lors de l'opération d'assemblage des parties de piston (2, 3; 32, 33), coopère avec la paroi intérieure (7) de la partie de piston supérieure (3, 33) de façon à réaliser un centrage (10). L'invention concerne en outre un procédé d'assemblage servant à fabriquer un piston.
EP13752639.8A 2012-08-23 2013-08-23 Assemblage d'un piston en acier en deux parties et procédé d'assemblage Withdrawn EP2888466A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012215043 2012-08-23
PCT/EP2013/067559 WO2014029878A1 (fr) 2012-08-23 2013-08-23 Assemblage d'un piston en acier en deux parties et procédé d'assemblage

Publications (1)

Publication Number Publication Date
EP2888466A1 true EP2888466A1 (fr) 2015-07-01

Family

ID=49029107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13752639.8A Withdrawn EP2888466A1 (fr) 2012-08-23 2013-08-23 Assemblage d'un piston en acier en deux parties et procédé d'assemblage

Country Status (4)

Country Link
US (2) US20160061326A1 (fr)
EP (1) EP2888466A1 (fr)
DE (1) DE102013216854A1 (fr)
WO (1) WO2014029878A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3377748A1 (fr) 2015-11-17 2018-09-26 KS Kolbenschmidt GmbH Piston pour moteur à combustion interne
CN106979329A (zh) * 2017-05-23 2017-07-25 湖南江滨机器（集团）有限责任公司 一种全钢活塞
DE102017210818A1 (de) * 2017-06-27 2018-12-27 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens für eine Brennkraftmaschine aus einem Kolbenoberteil und aus einem Kolbenunterteil
DE102017211480A1 (de) * 2017-07-05 2019-01-10 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036236A1 (de) * 2007-08-02 2009-02-05 Mahle International Gmbh Gebauter Kolben

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE123962C (fr)
FR1451838A (fr) * 1965-10-28 1966-01-07 Tsni Dizelny I Piston perfectionné pour moteurs à combustion interne
DD123962A1 (fr) 1975-12-24 1977-01-26
DE102007005268A1 (de) * 2006-02-17 2007-08-30 Ks Kolbenschmidt Gmbh Mehrteiliger Stahlkolben für einen Verbrennungsmotor mit einem Kühlkanal
US20070295299A1 (en) * 2006-06-12 2007-12-27 Mahle Technology, Inc. Piston for a combustion engine
DE102007044106A1 (de) * 2007-09-15 2009-03-19 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102009032941A1 (de) * 2009-07-14 2011-01-20 Mahle International Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102010056220A1 (de) * 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036236A1 (de) * 2007-08-02 2009-02-05 Mahle International Gmbh Gebauter Kolben

Also Published As

Publication number Publication date
WO2014029878A1 (fr) 2014-02-27
DE102013216854A1 (de) 2014-02-27
US20160061326A1 (en) 2016-03-03
US11098800B2 (en) 2021-08-24
US20180051805A1 (en) 2018-02-22

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