EP3405300A1 - Piston muni de trois rainures de segment et d'une autre rainure présentant un joint de séparation - Google Patents

Piston muni de trois rainures de segment et d'une autre rainure présentant un joint de séparation

Info

Publication number
EP3405300A1
EP3405300A1 EP17707473.9A EP17707473A EP3405300A1 EP 3405300 A1 EP3405300 A1 EP 3405300A1 EP 17707473 A EP17707473 A EP 17707473A EP 3405300 A1 EP3405300 A1 EP 3405300A1
Authority
EP
European Patent Office
Prior art keywords
piston
collar
ring
cooling channel
groove
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Withdrawn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
EP17707473.9A
Other languages
German (de)
English (en)
Inventor
Emmerich Ottliczky
Matthias Fahr
Gregor Müller
Ralf STIER
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 EP3405300A1 publication Critical patent/EP3405300A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B21K1/185—Making machine elements pistons or plungers with cooling channels
    • 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 
    • F02F2003/0007—Monolithic pistons; One piece constructions; Casting of 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
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • 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

Definitions

  • Piston with three annular grooves and a further groove having a parting line
  • the invention relates to a method for producing a cooling channel piston for an internal combustion engine, which has a piston channel in its piston crown, wherein the piston crown is followed by a piston lower part with piston hubs, bolt holes and Kolben2020ften, initially a piston body with a radially projecting in the region of the piston crown and circumferential collar wherein the collar is formed in such a way, until the outer circumferential edge comes very close or completely to rest against a contact region of the piston lower part to form the cooling channel, and then at least one annular groove is introduced, according to the features of the preamble of claim 1 ,
  • the present invention is based on a method for producing a cooling channel piston for an internal combustion engine and a cooling channel piston produced thereafter, which has a cooling channel in its piston head, wherein the cooling channel bottom a piston base with piston bosses, bolt holes and Kolben2020ften connect, first a piston blank with a in the field made of the piston crown radially projecting and circumferential collar and then the collar is formed, wherein formed in a transition region between the piston crown and the piston bottom an investment area for the collar and the collar is deformed in such a way until the outer radially circumferential edge very close or completely to plant comes to the contact area to form a closed cooling channel.
  • the cooling channel piston produced thereafter has three grooves, wherein rings are used in a known manner for the piston ready for use in these three annular grooves.
  • FIG. 1 shows a cooling channel piston 1 produced by the process described in DE 10 2004 031 513 A1.
  • This cooling channel piston 1 has a piston main body 2, in which the radially projecting and circumferential collar 3 has already been reshaped by about 90 ° and provided with three annular grooves 4.
  • the peripheral outer edge of the collar 3 comes into abutment with a piston lower part 5, so that a cooling channel 6 closed except at least one inflow opening and at least one drainage opening is created.
  • the system between the lower circumferential edge of the deformed collar 3 and the piston lower part 5 is at least partially circumferential, possibly completely encircling around the circumference of the cooling channel piston 1 in the region of a parting plane 7.
  • the invention has for its object to further develop the known method and to improve a cooling channel piston produced by this method in terms of its functionality.
  • annular groove below the at least one annular groove, in particular the lowermost annular groove into which a ring is later inserted, an annular groove is formed, wherein a dividing plane between the outer circumferential edge of the deformed collar and an upper surface of the piston lower part in the ring-free groove lies.
  • the parting plane between the ring field (more precisely, the lower edge of the deformed collar) is laid to the upwardly facing end of the piston shaft in a circumferential groove, which is free of a ring used there. It is thus in addition to the already existing two, three or more annular grooves are inserted into the rings, created a further ring-free groove, which is arranged below the known ⁇ lringnut.
  • the laying of the parting plane is carried out with the purpose that can be added in the region of the additional ring-free groove and thus produce a material connection between the ring field and the piston skirt, wherein advantageously the joining process takes place in an area which is free of a ring, so that there can be no processing or a minor processing to remove Fügewülsten after joining.
  • the joining plane or the joining area lying around it is not in a heavily loaded annular groove, thereby reducing the wear and the strength of the Cooling channel piston is increased.
  • the invention is applied to a piston with three grooves with each ring used there, and it is below the lowest annular groove ( ⁇ lringnut), the fourth circumferential groove in which the joint area is present.
  • the invention thus relates to a method for producing a cooling channel piston and a cooling channel piston produced thereafter, in which a parting plane between ring field and Kolbenschafft is laid in a below the ⁇ lringnut additionally provided circumferential groove without ring.
  • the collar is formed and reshaped so that in the region of the parting plane between the outer peripheral edge of the formed collar and a top of the piston lower part, a gap is formed.
  • a gap By means of such a gap, the oil accumulating on the cylinder wall during the movement of the cooling channel piston can be removed in the direction of an inner region of the cooling channel.
  • cooling oil which is located in the inner region of the cooling channel piston and is injected into and out of the cooling channel, can be conveyed via the gap in the direction of the cylinder wall in order to improve the friction. Oil can thus be collected and removed via the further ring-free groove or oil supplied can be conveyed in the direction of the cylinder wall.
  • the gap can be continuous in just one plane or in at least two or more than two different planes (preferably horizontally and vertically) from the exterior of the cooling channel piston in the direction of its inner region.
  • the collar is formed and shaped such that in the region of the parting plane, the outer peripheral edge of the deformed collar comes to rest on the upper side of the lower piston part. This avoids a gap and thus completely closes the contact area in the area of the parting plane. As a result, as far as necessary, effectively avoided that oil is conveyed from the inner region of the cooling channel piston in the direction of the cylinder wall. In addition, this significantly increases the collection effect of oil below the lowermost annular groove, in particular a ⁇ labstreifring is used by the further ring-free groove clearly.
  • the ring-free groove is formed by a machining process. After the first radially projecting and circumferential collar has been reshaped and forms the cooling channel, the ring-free groove below the lowest (or single) annular groove is produced by machining, in particular by a puncture process. This can be done, regardless of whether there is a gap in the region of the parting line or the peripheral lower edge of the collar has come to rest on the upper side of the piston lower part.
  • the ring-free groove is formed by a non-cutting machining process.
  • a non-cutting process for example, rolling, pressing or the like
  • processing step advantageous to the microstructure of the material around the gap around.
  • this is formed by a shaping of the outer circumferential edge of the formed collar and an upper side of the piston lower part.
  • this ring-free groove can be produced in a very simple manner.
  • the ring-free groove is formed by a shaping of the outer circumferential edge of the deformed collar and an upper side of the piston lower part and a subsequent machining process.
  • connection may be, for example, a spring-groove connection, wherein a (protruding for example from the end face of the outer circumferential edge of the circumferential collar) spring (projection) engages in a (for example, in the corresponding piston lower part existing) groove (or vice versa ) when the collar has been reshaped.
  • a spring-groove connection wherein a (protruding for example from the end face of the outer circumferential edge of the circumferential collar) spring (projection) engages in a (for example, in the corresponding piston lower part existing) groove (or vice versa ) when the collar has been reshaped.
  • Other geometries than the described tongue and groove geometry are also conceivable.
  • the joining process is carried out as a welding process, a soldering process, an adhesion process or the like.
  • a welding or soldering process the adjacent areas can be permanently connected to one another in a fast, cohesive and process-reliable manner.
  • an adhesive which must be designed to be temperature resistant.
  • a welding bead which is produced during the execution of the welding process is removed. This is done either by reworking the outer surface of the blank of the cooling channel piston after performing the joining operation and subsequent introduction of the ring-free groove (in particular by a machining process) or without prior revision of the surface of the blank of the cooling channel piston, so that a resulting weld bead by introducing the ring-free groove gelichzeitig is mitentfernt. The same applies to surpluses that arise during the soldering process or the gluing process.
  • FIGS. 2 to 5 A cooling channel piston produced by the method according to the invention is shown in FIGS. 2 to 5 and described below.
  • a cooling channel piston 10 is based on its production on the method which is described in DE 10 2004 031 513 A1.
  • the section of the cooling channel piston 10, as shown in FIG. 2, is based again on the fact that initially a radially projecting and circumferential collar is provided by a piston main body 20.
  • this initially projecting collar is reshaped, so that it is deformed with respect to the piston stroke axis from its initially approximately perpendicularly projecting alignment in an approximately parallel orientation.
  • the collar is thus "folded" about an angle of 90 °, so that a circumferential folded collar 30, as shown in Figure 2, starting from the piston body 20.
  • In the region of the folded collar 30 at least one annular groove 40 (here in The piston base body 20 also has a piston lower part 50, so that a cooling channel 60 is formed by the piston main body 20 together with the piston lower part 50 and the folded-over collar 30.
  • the parting plane 70 is placed in the region of an annular groove 80 according to the embodiment and according to the invention.
  • This ring-free groove 80 is formed by shaping the lower circumferential edge of the collar 30 and the corresponding upper side of the piston lower part 50 and / or is introduced by a corresponding processing step, in particular a machining process.
  • FIGS. 4 and 5 show such a ready-made cooling channel piston 10. It can be seen that this cooling channel piston 10 has the cooling channel 60 in its piston head 90 (and possibly a combustion bowl as shown), the piston base 50 being the piston base 50 Connect in a manner known per se piston bosses 100, pin holes 1 10 and piston shafts 120. With a 130 Kolbenhubachse is referred to, perpendicular to the bolt holes 1 10 a unspecified pin bore axis runs.
  • annular groove such a circumferential groove which is located in a ring field of the cooling channel piston and into which a piston ring (for example an oil scraper ring) is inserted.
  • outer peripheral edge of the circumferential collar is to be understood in particular that end face which faces radially outwardly before the deformation of the projecting from the piston body collar and which after its deformation when viewing the Kolbenhubachse downward (in the direction of the piston skirt).

Abstract

L'invention concerne un procédé de fabrication d'un piston à canal de refroidissement (10) pour un moteur à combustion interne, présentant, dans son fond de piston, un canal de refroidissement (60), une partie inférieure de piston (50) munie de bossages de piston (100), d'alésages d'axe (110) et de tiges de piston (120) prolongeant le fond de piston (90). Un corps de base de piston (20) muni d'un collet (30) périphérique en saillie radialement dans la zone du fond de piston est tout d'abord fabriqué, le collet (30) étant déformé jusqu'à ce que son bord périphérique extérieur vienne très près de ou entièrement en contact avec une zone de contact de la partie inférieure de piston (50), pour former le canal de refroidissement (60), après quoi est pratiquée au moins une rainure de segment (40). L'invention est caractérisée en ce qu'une rainure (80) sans segment est formée sous la rainure de segment (40), un plan de séparation (70) entre le bord périphérique extérieur du collet (30) déformé et une face supérieure de la partie inférieure de piston (50) se trouvant dans la rainure (80) sans segment.
EP17707473.9A 2016-01-22 2017-01-20 Piston muni de trois rainures de segment et d'une autre rainure présentant un joint de séparation Withdrawn EP3405300A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016000573 2016-01-22
PCT/EP2017/051241 WO2017125580A1 (fr) 2016-01-22 2017-01-20 Piston muni de trois rainures de segment et d'une autre rainure présentant un joint de séparation

Publications (1)

Publication Number Publication Date
EP3405300A1 true EP3405300A1 (fr) 2018-11-28

Family

ID=58185484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17707473.9A Withdrawn EP3405300A1 (fr) 2016-01-22 2017-01-20 Piston muni de trois rainures de segment et d'une autre rainure présentant un joint de séparation

Country Status (7)

Country Link
US (1) US20190022739A1 (fr)
EP (1) EP3405300A1 (fr)
CN (1) CN108472713A (fr)
BR (1) BR112018012880A2 (fr)
DE (1) DE102017101131A1 (fr)
MX (1) MX2018007605A (fr)
WO (1) WO2017125580A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018214130A1 (de) * 2018-08-21 2020-02-27 Volkswagen Aktiengesellschaft Hubkolbenbrennkraftmaschine und Hubkolben für eine Hubkolbenbrennkraftmaschine
DE102019122200A1 (de) * 2019-08-19 2021-02-25 Volkswagen Aktiengesellschaft Kolben mit einer Ölaufnahmevertiefung für einen Verbrennungsmotor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103698B (de) * 1959-10-23 1961-03-30 Schmidt Gmbh Karl Durch Schmieden oder Pressen hergestellter Kolben, vorzugsweise aus einer Aluminium-legierung fuer Brennkraftmaschinen und Kompressoren
US4193179A (en) * 1977-11-14 1980-03-18 Condor Manufacturing Inc. Process of manufacturing an article having a groove rolled therein, and an article produced thereby
DE10355828A1 (de) * 2003-11-28 2005-08-04 Ks Kolbenschmidt Gmbh Kolben mit einem Abdeckelement für einen Kühlkanal
DE102004031513A1 (de) 2004-06-30 2006-01-26 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Kühlkanalkolbens für eine Brennkraftmaschine
US20080245231A1 (en) * 2005-09-17 2008-10-09 Ks Kolbenschmidt Gmbh Piston, Especially Cooling Channel Piston, of an Internal Combustion Engine, Comprising Three Friction Welded Zones
WO2012010285A1 (fr) * 2010-07-19 2012-01-26 Ks Kolbenschmidt Gmbh Procédé de fabrication d'un piston à canal de refroidissement pour moteurs à combustion interne et piston ainsi fabriqué
DE102011115048A1 (de) * 2011-10-07 2013-04-11 Mahle International Gmbh Schmiedevorrichtung zur Herstellung eines Kolbenrohlings und Verfahren zur Herstellung des Kolbenrohlings unter Verwendung der Schmiedevorrichtung
CN102407431B (zh) * 2011-11-02 2013-08-14 山东滨州渤海活塞股份有限公司 一种带内冷却油腔的热旋压制锻钢整体活塞制造工艺
CN102423843B (zh) * 2011-11-02 2013-06-05 山东滨州渤海活塞股份有限公司 一种带内冷却油腔的冷旋压制锻钢整体活塞制造工艺
DE102013014346A1 (de) * 2013-03-18 2014-10-02 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor und mittels dieses Verfahrens hergestellter Kolben
CN203347934U (zh) * 2013-06-25 2013-12-18 常州南车柴油机零部件有限公司 一种船用大功率柴油机活塞

Also Published As

Publication number Publication date
WO2017125580A1 (fr) 2017-07-27
MX2018007605A (es) 2018-09-21
DE102017101131A1 (de) 2017-07-27
BR112018012880A2 (pt) 2018-12-04
CN108472713A (zh) 2018-08-31
US20190022739A1 (en) 2019-01-24

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