EP1173624A1 - Procede pour durcir des rainures annulaires par faisceau laser - Google Patents

Procede pour durcir des rainures annulaires par faisceau laser

Info

Publication number
EP1173624A1
EP1173624A1 EP00930984A EP00930984A EP1173624A1 EP 1173624 A1 EP1173624 A1 EP 1173624A1 EP 00930984 A EP00930984 A EP 00930984A EP 00930984 A EP00930984 A EP 00930984A EP 1173624 A1 EP1173624 A1 EP 1173624A1
Authority
EP
European Patent Office
Prior art keywords
piston
steel
groove
hardening
laser beam
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.)
Granted
Application number
EP00930984A
Other languages
German (de)
English (en)
Other versions
EP1173624B1 (fr
Inventor
Michael Weis
Karl Pfeil
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
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1173624A1 publication Critical patent/EP1173624A1/fr
Application granted granted Critical
Publication of EP1173624B1 publication Critical patent/EP1173624B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation

Definitions

  • the application relates to a method for hardening the annular grooves of a piston crown made of steel, a steel piston, a steel lower part or steel piston heads with laser radiation.
  • the edge is shaded by a special device in accordance with JP document (FIG. 2).
  • the position of the laser beam is precisely specified in the US document.
  • Both methods have in common that the laser beam is incident radially to the central axis of the piston, so that if the laser beam is intended to be elongated, it cuts the central axis of the piston and that an absorption-increasing graphite coating is applied before hardening.
  • the invention is concerned with the problem of preventing the groove base from hardening in generic methods.
  • Fig. 1 shows the arrangement of the laser beam relative to the piston head from above
  • Fig. 2 shows the arrangement of the laser beam relative to the piston crown, side view.
  • a piston crown 1 with annular grooves 2 and 3 is rotatably received in a clamping device, not shown.
  • the piston crown 1 is shown cut open in the groove plane.
  • the grooves in the piston crown are hardened by laser radiation.
  • the path of the laser beam is indicated by dashed lines.
  • the laser beam is directed toward the groove flank 5 in an approximately tangential direction with respect to the outer diameter of the piston crown 1.
  • the central axis 4 of the piston is indicated in FIG. 2.
  • the angle between the groove flank plane and the laser beam is relatively small and is less than 15.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

Dans un procédé pour durcir les rainures de pistons en acier ou de têtes de pistons en acier, on doit empêcher que le fond de la rainure soit durci. A cet effet, le faisceau laser est dirigé dans le sens sensiblement tangentiel, vers les flancs des rainures.
EP00930984A 1999-04-26 2000-03-21 Procede et appareil pour durcir des rainures annulaires par faisceau laser Expired - Lifetime EP1173624B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19918808 1999-04-26
DE19918808A DE19918808A1 (de) 1999-04-26 1999-04-26 Verfahren zum Härten von Ringnuten mit Laserstrahlen
PCT/DE2000/000919 WO2000065104A1 (fr) 1999-04-26 2000-03-21 Procede pour durcir des rainures annulaires par faisceau laser

Publications (2)

Publication Number Publication Date
EP1173624A1 true EP1173624A1 (fr) 2002-01-23
EP1173624B1 EP1173624B1 (fr) 2003-09-10

Family

ID=7905838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00930984A Expired - Lifetime EP1173624B1 (fr) 1999-04-26 2000-03-21 Procede et appareil pour durcir des rainures annulaires par faisceau laser

Country Status (5)

Country Link
US (1) US6592690B1 (fr)
EP (1) EP1173624B1 (fr)
JP (1) JP4700198B2 (fr)
DE (2) DE19918808A1 (fr)
WO (1) WO2000065104A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009062486A1 (fr) * 2007-11-16 2009-05-22 Mahle International Gmbh Procédé pour faire durcir les flancs de la gorge circulaire d'un piston en acier par un faisceau laser

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10118291C5 (de) * 2001-04-12 2010-07-22 Sms Elotherm Gmbh Vorrichtung zum Laser-Belichten einer Fläche von metalischen Werkstücken und deren Verwendung
DE10337962B4 (de) * 2003-08-19 2012-04-26 Mahle Gmbh Verfahren zum Härten der Nutflächen, insbesondere der Nutflanken der Ringnuten eines Stahlkolbens
US20050132569A1 (en) * 2003-12-22 2005-06-23 Clark Donald G. Method of repairing a part using laser cladding
JP5101838B2 (ja) * 2006-05-16 2012-12-19 ヤンマー株式会社 金属部材の表面硬化方法
EP2024522B1 (fr) 2006-06-03 2017-11-29 KS Kolbenschmidt GmbH Procédé de durcissement d'une rainure annulaire du fond d'un piston au moyen de faisceaux laser
US20080053384A1 (en) * 2006-08-23 2008-03-06 Nuvonyx, Inc. Piston having diode laser hardened primary compression ring groove and method of making the same
US8322004B2 (en) * 2009-04-29 2012-12-04 Caterpilar Inc. Indirect laser induced residual stress in a fuel system component and fuel system using same
JP5480203B2 (ja) * 2011-06-17 2014-04-23 ヤンマー株式会社 金属部材の表面硬化方法
DE102019133522B4 (de) * 2019-12-09 2023-04-20 Federal-Mogul Nürnberg GmbH Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor und Kolben für einen Verbrennungsmotor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60221515A (ja) * 1984-04-18 1985-11-06 Mitsubishi Electric Corp レ−ザ加工装置
JPS6160290A (ja) * 1984-08-31 1986-03-27 Toyota Motor Corp レ−ザを用いたワ−クの処理方法
JPS61149424A (ja) * 1984-12-24 1986-07-08 Yanmar Diesel Engine Co Ltd 凹凸部からなる部材のレ−ザ−焼入方法
JPH02104612A (ja) * 1988-10-12 1990-04-17 Toshiba Corp レーザ焼入れ方法
JPH0640587Y2 (ja) * 1988-10-12 1994-10-26 株式会社東芝 レーザ加工装置
CH689643A5 (fr) * 1994-02-18 1999-07-30 Speno International Installation pour le reprofilage des rails d'une voie ferrée.
US5515770A (en) * 1994-12-05 1996-05-14 Clark Industries, Inc. Piston having laser hardened primary compression ring groove and method of making same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0065104A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009062486A1 (fr) * 2007-11-16 2009-05-22 Mahle International Gmbh Procédé pour faire durcir les flancs de la gorge circulaire d'un piston en acier par un faisceau laser

Also Published As

Publication number Publication date
WO2000065104A1 (fr) 2000-11-02
DE50003649D1 (de) 2003-10-16
JP4700198B2 (ja) 2011-06-15
US6592690B1 (en) 2003-07-15
DE19918808A1 (de) 2000-11-02
JP2002543275A (ja) 2002-12-17
EP1173624B1 (fr) 2003-09-10

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