EP2440365A1 - Procédé de fabrication d'un piston d'un moteur à combustion interne à l'aide d'un apport d'énergie inductive et d'une irradiation par laser - Google Patents

Procédé de fabrication d'un piston d'un moteur à combustion interne à l'aide d'un apport d'énergie inductive et d'une irradiation par laser

Info

Publication number
EP2440365A1
EP2440365A1 EP10744675A EP10744675A EP2440365A1 EP 2440365 A1 EP2440365 A1 EP 2440365A1 EP 10744675 A EP10744675 A EP 10744675A EP 10744675 A EP10744675 A EP 10744675A EP 2440365 A1 EP2440365 A1 EP 2440365A1
Authority
EP
European Patent Office
Prior art keywords
laser beam
combustion bowl
piston
combustion
edge
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Withdrawn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
EP10744675A
Other languages
German (de)
English (en)
Inventor
Christian Schaller
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 EP2440365A1 publication Critical patent/EP2440365A1/fr
Withdrawn legal-status Critical Current

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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0823—Devices involving rotation of the workpiece
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/10—Devices involving relative movement between laser beam and workpiece using a fixed support, i.e. involving moving the laser beam
    • 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

Definitions

  • the invention relates to a method for producing a piston of an internal combustion engine by means of inductive energy supply and laser irradiation according to the features of the preamble of patent claim 1.
  • the invention is therefore based on the object, a method for producing a piston of an internal combustion engine in which the combustion bowl trough edge is heated inductively and melted by means of a laser beam, to further improve.
  • the laser beam is deflected during a rotational relative movement with respect to the piston.
  • either the piston rests and the laser beam rotates relative to the piston i.e., the load beam itself is moved radially along the combustion bowl trough edge.
  • An alternative to this is to direct the laser beam to a point while rotating the piston relative to the laser beam.
  • the laser beam is directed from one laser beam source or even several laser beam sources directly to the combustion bowl trough edge or the supply of the at least one laser beam indirectly, for example by means of a mirror system (also referred to as -Scanner) to the combustion bowl trough edge judge.
  • a mirror system also referred to as -Scanner
  • the laser beam is directed onto the combustion bowl trough edge in such a way that the laser beam is deflected out of a laser beam source or out of several laser beam sources during the rotational relative movement with respect to the piston.
  • This deflection takes place, for example, with respect to a piston stroke axis, to a region above and below the vertex of the combustion bowl trough edge, based on its cross section.
  • This makes it possible, not with the inventive method only to melt a larger surface but also a greater depth of the combustion bowl edge and thus to achieve a hardening by changing the microstructure, which is substantially improved compared to the known method.
  • This means that the execution of the method according to the invention achieves a remelting track which is wider and deeper than the remelting track which is achieved with the known hardening method.
  • the laser beam is punctiformly directed punctiformly during the rotational movement onto the region of the combustion chamber bowl rim to be remelted.
  • the laser beam is split into several so-called laser spots or laser spots. This can e.g. be effected by the laser beam by a corresponding control briefly on and off or the generation of laser spots are achieved by a corresponding optics by the laser beam is once directed to the combustion chamber trough edge and another time of this pioneering.
  • This interrupted punctiform irradiation of the combustion bowl trough edge with the laser beam can in jsiner embodiment be carried out continuously during the rotational movement of either the piston or the laser beam source.
  • the piston is further rotatably moved relative to the laser beam (or vice versa, by the laser beam is further rotated rotatably and the piston rests), in which case the next Partial area is remelted, wherein the rotational advancement is carried out so often until the entire combustion bowl rim has been melted in its radial extent.
  • the combustion bowl rim is used to optimize the remelting process and to improve its resistance partially remelted, wherein the desired width and depth can be adjusted for the remelting process by the deflection of the laser beam and in particular in connection with the point-shaped irradiation.
  • the intensity of the laser beam in the course of the irradiation either remains the same or is changed.
  • the intensity and hence the energy input can remain the same, resulting in a uniform remelting process in the radial course of the combustion bowl rim.
  • the intensity of the laser beam during its deflection and also with respect to the rotational movement can be changed.
  • parts of the combustion bowl rim can be achieved with different degrees of hardness.
  • the residence time of the laser beam is set to the area to be reflowed and / or by the energy output of the laser source.
  • the invention thus offers the advantage that, on the one hand, the remelted area (in particular the width and the depth) of the combustion bowl trough edge is significantly increased and, if desired, different degrees of hardness of the combustion bowl trough edge can be set in its radial course.
  • the deflection of the laser beam over the remeltable area of the combustion bowl trough edge and in particular the interrupted point-like irradiation of the combustion bowl trough edge offers the significant advantage that sufficient Energy for remelting the combustion bowl rim is available to remelt the desired depth and width, while at the same time preventing the irradiated area from melting away and thus the combustion bowl rim in its geometric shape after being manufactured by a casting process (or forging process) is changed.
  • the present invention thus offers the advantage that a significantly larger Umschmelsvolumen can be generated either by the scanner, the beam splitting or by the use of multiple lasers at the same process time (for example, a revolution for the machining of the piston).
  • combustion bowl trough edge can be interrupted punctually irradiated during the deflection of the laser beam.
  • FIG. 4 shows a further variant in which the laser beam sweeps over the area of the combustion bowl trough edge during the rotational feed movement, wherein this sweeping can not be carried out in a punctiform manner but also continuously.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Heat Treatment Of Articles (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un piston d'un moteur à combustion interne, le piston présentant une cavité de chambre de combustion avec un bord de cavité de chambre de combustion et le bord de cavité de chambre de combustion étant durci du fait qu'il est refondu, lors d'une première étape, au moyen d'un apport d'énergie inductive et, lors d'une deuxième étape, par irradiation par laser. Selon l'invention, il est prévu que le faisceau laser soit dévié par rapport au piston pendant le mouvement relatif de rotation.
EP10744675A 2009-06-10 2010-06-10 Procédé de fabrication d'un piston d'un moteur à combustion interne à l'aide d'un apport d'énergie inductive et d'une irradiation par laser Withdrawn EP2440365A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009025064A DE102009025064A1 (de) 2009-06-10 2009-06-10 Verfahren zur Herstellung eines Kolbens einer Brennkraftmaschine mittels induktiver Energiezufuhr und Laserbestrahlung
PCT/EP2010/003474 WO2010142439A1 (fr) 2009-06-10 2010-06-10 Procédé de fabrication d'un piston d'un moteur à combustion interne à l'aide d'un apport d'énergie inductive et d'une irradiation par laser

Publications (1)

Publication Number Publication Date
EP2440365A1 true EP2440365A1 (fr) 2012-04-18

Family

ID=43308442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10744675A Withdrawn EP2440365A1 (fr) 2009-06-10 2010-06-10 Procédé de fabrication d'un piston d'un moteur à combustion interne à l'aide d'un apport d'énergie inductive et d'une irradiation par laser

Country Status (6)

Country Link
US (1) US20120187110A1 (fr)
EP (1) EP2440365A1 (fr)
JP (1) JP2012529586A (fr)
CN (1) CN102802863A (fr)
DE (1) DE102009025064A1 (fr)
WO (1) WO2010142439A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212791B4 (de) * 2012-07-20 2014-02-27 Federal-Mogul Nürnberg GmbH Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1507203A (en) * 1974-07-12 1978-04-12 Caterpillar Tractor Co Method and apparatus for heat treating the surface of an internal bore in a workpiece
DD291717A5 (de) * 1990-01-31 1991-07-11 Fz Des Werkzeugmaschinenbaues Chemnitz,De Verfahren zur einstellung definierter lateraler temperaturfelder bei der lasermaterialbearbeitung
DE4430220C2 (de) * 1994-08-25 1998-01-22 Fraunhofer Ges Forschung Verfahren zur Steuerung der Laserstrahlintensitätsverteilung auf der Oberfläche zu bearbeitender Bauteile
JP3518723B2 (ja) * 1998-05-25 2004-04-12 トヨタ自動車株式会社 肉盛方法
US8319150B2 (en) * 2004-07-09 2012-11-27 General Electric Company Continuous motion laser shock peening
JP2008267598A (ja) * 2007-03-23 2008-11-06 Yamaha Motor Co Ltd クランクシャフト、内燃機関、輸送機器およびクランクシャフトの製造方法
DE102007044696A1 (de) 2007-06-29 2009-01-08 Ks Kolbenschmidt Gmbh Schmelzbehandelter Muldenrand einer Kolben-Brennraummulde
DE102011119527A1 (de) * 2011-11-26 2013-05-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010142439A1 *

Also Published As

Publication number Publication date
WO2010142439A1 (fr) 2010-12-16
JP2012529586A (ja) 2012-11-22
DE102009025064A1 (de) 2011-04-28
CN102802863A (zh) 2012-11-28
US20120187110A1 (en) 2012-07-26

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