EP1173624B1 - Procede et appareil pour durcir des rainures annulaires par faisceau laser - Google Patents

Procede et appareil pour durcir des rainures annulaires par faisceau laser Download PDF

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Publication number
EP1173624B1
EP1173624B1 EP00930984A EP00930984A EP1173624B1 EP 1173624 B1 EP1173624 B1 EP 1173624B1 EP 00930984 A EP00930984 A EP 00930984A EP 00930984 A EP00930984 A EP 00930984A EP 1173624 B1 EP1173624 B1 EP 1173624B1
Authority
EP
European Patent Office
Prior art keywords
piston
hardening
laser beam
groove
laser
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.)
Expired - Lifetime
Application number
EP00930984A
Other languages
German (de)
English (en)
Other versions
EP1173624A1 (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

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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 in accordance with the JP document (FIG. 2) by a special device.
  • the position of the laser beam is precisely specified in the US script.
  • 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.
  • a device for performing the method is characterized in claim 6.
  • Tangential beam guidance is understood to mean that the laser beams projected into the plane of the ring grooves only cut the piston or piston crown peripherally in the area of its ring grooves as secants. In other words, the laser beam is brought to the piston approximately in the circumferential direction.
  • 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 towards the groove flank 5 in an approximately tangential direction based on 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)

Claims (6)

  1. Procédé pour durcir par faisceau laser les rainures annulaires d'un fond de piston en acier, d'un piston en acier d'un seul tenant, d'une tête de piston en acier ou d'une partie inférieure en acier d'un piston,
    caractérisé en ce
    que le faisceau laser est guidé vers le piston sensiblement dans la direction périphérique.
  2. Procédé selon la revendication 1,
    caractérisé en ce
    que le faisceau laser projeté dans le plan des rainures annulaires ne coupe le fond de piston que périphériquement dans la zone de ses rainures annulaires, en tant que sécante.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce
    que le faisceau laser est orienté vers le flanc de rainure (5) sous un angle relativement petit par rapport au plan du flanc de rainure, de telle sorte que les faisceaux réfléchis par un flanc de rainure (5) ne touchent ni le fond de rainure ni l'autre flanc de rainure (5) correspondant.
  4. Procédé selon la revendication 1 ou 2,
    caractérisé en ce
    qu'aucun revêtement superficiel n'est réalisé dans les zones à durcir pour augmenter l'absorption.
  5. Procédé selon l'une des revendication 1 à 4,
    caractérisé en ce
    que les deux flancs de rainure (5) sont durcis simultanément.
  6. Dispositif pour mettre en oeuvre le procédé selon la revendication 1,
    caractérisé en ce
    que le dispositif pour durcir au laser, qui guide le faisceau laser vers le piston sensiblement dans la direction périphérique, est intégré à une machine-outil à enlèvement de copeaux, de telle sorte que le durcissement et l'usinage de finition de la pièce sont possibles dans le même bridage.
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 EP1173624A1 (fr) 2002-01-23
EP1173624B1 true 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
WO2007140826A1 (fr) * 2006-06-03 2007-12-13 Ks Kolbenschmidt Gmbh Procédé de durcissement d'une rainure annulaire du fond d'un piston au moyen de faisceaux laser et piston fabriqué selon le procédé

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
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
DE102007054736A1 (de) * 2007-11-16 2009-05-20 Mahle International Gmbh Verfahren zum Härten von Nutflanken der Ringnut eines Stahlkolbens
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007140826A1 (fr) * 2006-06-03 2007-12-13 Ks Kolbenschmidt Gmbh Procédé de durcissement d'une rainure annulaire du fond d'un piston au moyen de faisceaux laser et piston fabriqué selon le procédé
JP2009540222A (ja) * 2006-06-03 2009-11-19 カーエス コルベンシュミット ゲゼルシャフト ミット ベシュレンクテル ハフツング ピストンヘッドのリング溝をレーザビームによって硬化させるための方法ならびに該方法により製作されたピストン
US8297179B2 (en) 2006-06-03 2012-10-30 Ks Kolbenschmidt Gmbh Process for hardening an annular groove of a piston head by means of laser beams and a piston produced by the process

Also Published As

Publication number Publication date
US6592690B1 (en) 2003-07-15
DE19918808A1 (de) 2000-11-02
JP2002543275A (ja) 2002-12-17
WO2000065104A1 (fr) 2000-11-02
JP4700198B2 (ja) 2011-06-15
DE50003649D1 (de) 2003-10-16
EP1173624A1 (fr) 2002-01-23

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