WO2017068059A1 - Piston à multiple assemblé par un procédé de soudage hybride - Google Patents

Piston à multiple assemblé par un procédé de soudage hybride Download PDF

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Publication number
WO2017068059A1
WO2017068059A1 PCT/EP2016/075260 EP2016075260W WO2017068059A1 WO 2017068059 A1 WO2017068059 A1 WO 2017068059A1 EP 2016075260 W EP2016075260 W EP 2016075260W WO 2017068059 A1 WO2017068059 A1 WO 2017068059A1
Authority
WO
WIPO (PCT)
Prior art keywords
joining
piston
parts
welding method
zones
Prior art date
Application number
PCT/EP2016/075260
Other languages
German (de)
English (en)
Inventor
Steffen Stork
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 WO2017068059A1 publication Critical patent/WO2017068059A1/fr

Links

Classifications

    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/24—Preliminary treatment
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • 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
    • 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
    • F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding

Definitions

  • the invention relates to a method for producing a piston, wherein an upper part having at least one joining zone and a lower part having at least one joining zone are manufactured separately from one another and then joined together inseparably with each other in the region of the joining zones by means of a joining method.
  • the invention is therefore based on the object to provide a method for producing a piston, with which the above-described disadvantages are avoided.
  • At least one of the joining zones of the upper part and / or of the lower part is heated to melting by a resistance welding process and then the two parts are rotated relative to one another and axially compressed.
  • the production of upper and lower parts separately can be done in a conventional manner by forging, casting or the like. The same applies to the choice of material, so that upper part and lower part may consist of the same materials or different materials.
  • the upper part and / or the lower part are heated by resistance welding.
  • the joining zone of the upper part and / or the joining zone of the lower part is purposefully heated until it melts, preparing it for the next processing step.
  • the next processing step is to either rotate the two parts and then compress them by applying an axial force (along the piston stroke axis).
  • an axial force (along the piston stroke axis).
  • both the application of the axial force to compress the insert both parts and the rotational movement almost simultaneously or temporally spaced from each other.
  • the inventive method for producing a piston has the advantage that the molten surface of the affected joining zone is torn apart by the rotational movement of the two parts to each other, so that thereby an optimal non-detachable connection of the two parts takes place together. It can thus no more local break points arise.
  • the method according to the invention has the significant advantage that, to delimit the known process also known as "spinduction", the energy is introduced into the joining zones by the much lower energy resistance welding method, which means that when the joining zones melt by means of induction heat, the energy input is about 95% due to induction heat takes place, while according to the invention, the energy is introduced by resistance welding, resulting in a significant energy savings.In addition to this energy saving and no costly high-frequency generator is necessary.
  • the upper part and / or the lower part is used as an anode for the resistance welding process.
  • no additional tool such as the high-frequency generator for generating the induction heat
  • at least a part of the piston serves as a tool.
  • the costs can be significantly reduced, especially in the mass production of pistons.
  • the upper part is fixed and the lower part is set in rotation or vice versa.
  • the manufacturing process can be optimized in which one part of the piston is clamped in one tool (and in particular simultaneously serves as anode), while the other part is set in rotation.
  • both parts are moved towards each other, that the fixed part is not moved and the rotating part is moved to the fixed part or that the rotating part remains in a plane, wherein the fixed part of the in the fixed plane rotating part is pressed.
  • the piston blank consisting of the undissolvably joined to the upper part lower part, finished to a ready piston.
  • the upper part comprises a ring field, optionally, for example, a cooling channel and / or a combustion bowl and possibly further elements of the piston.
  • the lower part likewise comprises elements such as a piston shaft (or supporting diametrically opposite shaft wall sections), bolt bores, pin bosses, possibly connecting walls and the like, in a manner known per se.
  • the joining zones of the upper part and of the lower part are formed, for example, by mutually facing circumferential webs, wherein more than one common joining region (eg two concentrically mutually juxtaposed joining regions) may also be present.
  • more than one common joining region eg two concentrically mutually juxtaposed joining regions
  • this is just an example, so it on the design of at least one joining zone of the upper part and the lower part does not arrive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un piston, une partie supérieure présentant au moins une zone d'assemblage et une partie inférieure présentant au moins une zone d'assemblage étant réalisées de manière séparée puis réunies en étant fixées à demeure au niveau des zones d'assemblage par un procédé d'assemblage, caractérisé en ce qu'au moins une des zones d'assemblage de la partie supérieure et/ou de la partie inférieure sont chauffées par un procédé de soudage par résistance jusqu'à la fusion. Les deux parties sont ensuite animées d'un mouvement de rotation l'une par rapport à l'autre et sont axialement pressées l'une contre l'autre.
PCT/EP2016/075260 2015-10-21 2016-10-20 Piston à multiple assemblé par un procédé de soudage hybride WO2017068059A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015220520.7 2015-10-21
DE102015220520 2015-10-21

Publications (1)

Publication Number Publication Date
WO2017068059A1 true WO2017068059A1 (fr) 2017-04-27

Family

ID=57249776

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/075260 WO2017068059A1 (fr) 2015-10-21 2016-10-20 Piston à multiple assemblé par un procédé de soudage hybride

Country Status (2)

Country Link
DE (1) DE102016120023A1 (fr)
WO (1) WO2017068059A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1277579A (en) * 1968-07-15 1972-06-14 Wellworthy Ltd Pistons
WO2004044409A2 (fr) * 2002-11-06 2004-05-27 Federal-Mogul Corporation Piston et son procede de fabrication
WO2005060315A1 (fr) 2003-12-12 2005-06-30 Federal-Mogul Corporation Piston et son procede de fabrication
DE102010033879A1 (de) * 2010-08-10 2012-02-16 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor sowie Kolben für einen Verbrennungsmotor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1277579A (en) * 1968-07-15 1972-06-14 Wellworthy Ltd Pistons
WO2004044409A2 (fr) * 2002-11-06 2004-05-27 Federal-Mogul Corporation Piston et son procede de fabrication
WO2005060315A1 (fr) 2003-12-12 2005-06-30 Federal-Mogul Corporation Piston et son procede de fabrication
DE102010033879A1 (de) * 2010-08-10 2012-02-16 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor sowie Kolben für einen Verbrennungsmotor

Also Published As

Publication number Publication date
DE102016120023A1 (de) 2017-04-27

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