EP1303014B1 - Method of manufacturing of spark plugs - Google Patents

Method of manufacturing of spark plugs Download PDF

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Publication number
EP1303014B1
EP1303014B1 EP02019198A EP02019198A EP1303014B1 EP 1303014 B1 EP1303014 B1 EP 1303014B1 EP 02019198 A EP02019198 A EP 02019198A EP 02019198 A EP02019198 A EP 02019198A EP 1303014 B1 EP1303014 B1 EP 1303014B1
Authority
EP
European Patent Office
Prior art keywords
noble metal
electrode
tip
metal ball
welding
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
EP02019198A
Other languages
German (de)
French (fr)
Other versions
EP1303014A1 (en
Inventor
Werner Niessner
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
Beru AG
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 Beru AG filed Critical Beru AG
Publication of EP1303014A1 publication Critical patent/EP1303014A1/en
Application granted granted Critical
Publication of EP1303014B1 publication Critical patent/EP1303014B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
    • H01T21/02—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs of sparking plugs

Definitions

  • the invention relates to a method for manufacturing of spark plugs with central and body electrode (s), which with Precious metal inserts are armored.
  • the object underlying the invention is in specifying a method of the type mentioned at the beginning, quickly and economically with high manufacturing reliability can be carried out.
  • the center electrode has a preferred one Embodiment of the invention a pyramid-shaped Tip (round pyramid) 9, with the base diameter of the Tip 9 has the diameter d.
  • a welding electrode 3 is arranged in the end face a precious metal ball 2, in its most preferred embodiment consists of iridium / iridium alloy, stored is; it also has a diameter of d.
  • the usual spark plugs have a diameter d in the range of 0.4 to 1.0 mm, in particular from 0.6 to 0.8 mm.
  • the noble metal ball 2 in the End face of the center electrode is embedded in that the pyramid-shaped center electrode tip 9 on the precious metal ball 2 is pressed and liquefied, the Material of the tip 9 flows around the precious metal ball 2 to the extent in which they are not in the end face of the welding electrode 3 is embedded; Precious metal ball 2 is preferred about half sunk in the end face of the welding electrode 3 stored.
  • the Body electrode (s) 8 the spherical precious metal reinforcement 2 be introduced.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Spark Plugs (AREA)

Abstract

The tip (9) of a center electrode (1) is formed like a pyramid with a base diameter (d1). A ball (2) of noble metal with a specific diameter (d) is lodged on its face in a welding electrode (3), which is pressed onto the ball by liquefying the tip of the center electrode and by applying a defined welding force acting against it and defined welding parameters for liquefying the tip of the center electrode, the liquefied material of which flows partly round the ball. <??>After the liquefied material of the tip of the center electrode has solidified, the welding electrode is separated from the center electrode with the ball of noble metal that has been embedded. An Independent claim is also included for a spark plug produced by the method of the present invention.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Zündkerzen mit Mittel- und Körperelektrode(n), die mit Edelmetalleinsätzen armiert sind.The invention relates to a method for manufacturing of spark plugs with central and body electrode (s), which with Precious metal inserts are armored.

Aus Patent Abstracts of Japan, Volume 2000, No. 14 sowie der JP-A-2000306654 ist es bekannt, eine Zündkerze herzustellen, bei der ein Edelmetallelement auf der Zündfläche der Mittelelektrode angeordnet ist.From Patent Abstracts of Japan, Volume 2000, No. 14 as well from JP-A-2000306654 it is known to produce a spark plug with a precious metal element on the ignition surface the center electrode is arranged.

Die der Erfindung zugrunde liegende Aufgabe besteht darin, ein Verfahren der eingangs genannten Art anzugeben, das mit hoher Fertigungssicherheit schnell und wirtschaftlich durchgeführt werden kann.The object underlying the invention is in specifying a method of the type mentioned at the beginning, quickly and economically with high manufacturing reliability can be carried out.

Diese Aufgabe wird gemäß der Erfindung durch das im Anspruch 1 angegebene Verfahren gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Ansprüchen 2 bis 6.This object is achieved according to the invention by the claim 1 specified method solved. Further advantageous embodiments of the invention result themselves from claims 2 to 6.

Die Erfindung wird anhand der beiliegenden Figuren 1 bis 3 näher erläutert.The invention is illustrated by the attached figures 1 to 3 explained in more detail.

Hierbei sind

  • Figur 1 ein schematischer Längsschnitt durch den Spitzenbereich einer Mittelelektrode einer erfindungsgemäßen Zündkerze mit gegenüberliegender Schweißelektrode;
  • Figur 2a und 2b schematische Längsschnitte durch den Spitzenbereich der Mittelelektrode 1 mit integrierter Edelmetallkugel 2 (Figur 2a), und mit zusätzlicher Fixierung der Edelmetallkugel 2 durch Laserschmelzpunkte 5 (Figur 2b);
  • Figur 3 ein schematischer Längsschnitt durch den Spitzenbereich einer erfindungsgemäßen Zündkerze, einschließlich Körperelektrode.
    • Here are
  • 1 shows a schematic longitudinal section through the tip region of a central electrode of a spark plug according to the invention with an opposite welding electrode;
  • 2a and 2b are schematic longitudinal sections through the tip region of the center electrode 1 with an integrated noble metal ball 2 (FIG. 2a), and with additional fixation of the noble metal ball 2 by laser melting points 5 (FIG. 2b);
  • Figure 3 is a schematic longitudinal section through the tip area of a spark plug according to the invention, including the body electrode.

    • Gemäß Figur 1 weist die Mittelelektrode einer bevorzugten Ausführungsform der Erfindung eine pyramidenförmige Spitze (Rundpyramide) 9 auf, wobei der Basisdurchmesser der Spitze 9 den Durchmesser d besitzt. Gegenüberliegend ist eine Schweißelektrode 3 angeordnet, in deren Stirnfläche eine Edelmetallkugel 2, die in ihrer bevorzugtesten Ausführungsform aus Iridium/Iridiumlegierung besteht, gelagert ist; sie weist ebenfalls einen Durchmesser von d auf. Für übliche Zündkerzen liegt der Durchmesser d im Bereich von 0,4 bis 1,0 mm, insbesondere von 0,6 bis 0,8 mm.According to FIG. 1, the center electrode has a preferred one Embodiment of the invention a pyramid-shaped Tip (round pyramid) 9, with the base diameter of the Tip 9 has the diameter d. Is opposite a welding electrode 3 is arranged in the end face a precious metal ball 2, in its most preferred embodiment consists of iridium / iridium alloy, stored is; it also has a diameter of d. For The usual spark plugs have a diameter d in the range of 0.4 to 1.0 mm, in particular from 0.6 to 0.8 mm.

    Erfindungsgemäß wird die Edelmetallkugel 2 in der Stirnfläche der Mittelelektrode dadurch eingebettet, dass die pyramidenförmigen Mittelelektrodenspitze 9 auf die Edelmetallkugel 2 aufgedrückt und verflüssigt wird, wobei das Material der Spitze 9 die Edelmetallkugel 2 in dem Maße umfließt, in dem sie nicht in der Stirnfläche der Schweißelektrode 3 eingebettet ist; bevorzugt ist die Edelmetallkugel 2 etwa hälftig in der Stirnfläche der Schweißelektrode 3 versenkt gelagert.According to the noble metal ball 2 in the End face of the center electrode is embedded in that the pyramid-shaped center electrode tip 9 on the precious metal ball 2 is pressed and liquefied, the Material of the tip 9 flows around the precious metal ball 2 to the extent in which they are not in the end face of the welding electrode 3 is embedded; Precious metal ball 2 is preferred about half sunk in the end face of the welding electrode 3 stored.

    Nach Erkalten des Materials der Mittelelektrodenspitze 9 werden Schweißelektrode 3 und Mittelektrode 1, in der nunmehr die Edelmetallkugel 2 etwa hälftig eingebettet ist, getrennt. Dieser Zustand wird in Figur 2a wiedergegeben, während in Figur 2b dargestellt wird, dass die Edelmetallkugel 2 zusätzlich durch Laserschmelzpunkte in der Stirnfläche der Mittelelektrode 1 fixiert ist.After the material of the center electrode tip has cooled 9 are welding electrode 3 and center electrode 1, in the now the precious metal ball 2 is approximately half embedded, Cut. This state is shown in Figure 2a, while it is shown in Figure 2b that the precious metal ball 2 additionally by laser melting points in the end face the center electrode 1 is fixed.

    In entsprechender Weise kann in die Stirnfläche(n) der Körperelektrode(n) 8 die kugelförmige Edelmetallarmierung 2 eingebracht werden.In a corresponding manner, the Body electrode (s) 8 the spherical precious metal reinforcement 2 be introduced.

    Claims (6)

    1. Method for manufacturing spark plugs with central and earth electrode(s) which are fitted with noble metal inserts, characterised in that the tip (9) of the central electrode (1) is configured in the shape of a pyramid having a base width (d); in that a noble metal ball (2) having a diameter (d) is mounted on the end of a welding electrode (3); in that the tip (9) of the central electrode is liquefied and pressed on to the noble metal ball (2) using a defined welding pressure and defined welding parameters for liquefying the central electrode tip (9), the liquefied material of the central electrode tip (9) flowing partially around the noble metal ball (2); and in that after solidification of the liquefied material of the central electrode tip (9) the welding electrode (3) is separated from the central electrode (1) with embedded noble metal ball (2).
    2. Method according to claim 1, characterised in that the earth electrode (s) (8) is/are fitted in the. same way with a noble metal ball (2).
    3. Method according to claim 1 or 2, characterised in that the welding is carried out in the form of resistance welding.
    4. Method according to any one of the preceding claims, characterised in that the noble metal ball (2) is made of iridium or iridium alloy.
    5. Method according to any one of the preceding claims, characterised in that a further fixing of the noble metal ball (2) in the end face of the central electrode (1) and/or of the earth electrode(s) is effected by means of laser fusion spots (5).
    6. Method according to any one of the preceding claims, characterised in that the diameter (d) of the noble metal ball (2) is 0.4 to 1.0 mm, preferably 0.6 to 0.8 mm.
    EP02019198A 2001-10-09 2002-09-02 Method of manufacturing of spark plugs Expired - Lifetime EP1303014B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10149630 2001-10-09
    DE10149630A DE10149630C1 (en) 2001-10-09 2001-10-09 Spark plug and process for its manufacture

    Publications (2)

    Publication Number Publication Date
    EP1303014A1 EP1303014A1 (en) 2003-04-16
    EP1303014B1 true EP1303014B1 (en) 2004-12-01

    Family

    ID=7701819

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02019198A Expired - Lifetime EP1303014B1 (en) 2001-10-09 2002-09-02 Method of manufacturing of spark plugs

    Country Status (6)

    Country Link
    US (1) US6791246B2 (en)
    EP (1) EP1303014B1 (en)
    JP (1) JP2003120931A (en)
    AT (1) ATE284085T1 (en)
    DE (2) DE10149630C1 (en)
    ES (1) ES2229037T3 (en)

    Families Citing this family (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10149630C1 (en) 2001-10-09 2003-10-09 Beru Ag Spark plug and process for its manufacture
    JP4220308B2 (en) * 2003-05-29 2009-02-04 株式会社デンソー Spark plug
    WO2005013448A1 (en) * 2003-08-03 2005-02-10 Hosny Ibrahim Sabry Spark plug
    KR20090003271A (en) * 2006-03-24 2009-01-09 페더럴-모걸 코오포레이숀 Spark plug
    KR20090033232A (en) 2006-06-19 2009-04-01 페더럴-모걸 코오포레이숀 Small diameter/long reach spark plug
    CN101507067A (en) 2006-06-19 2009-08-12 费德罗-莫格尔公司 Spark plug with fine wire ground electrode
    US8460044B2 (en) * 2009-01-23 2013-06-11 Fram Group Ip Llc Spark plug electrode and method of making
    JP2010253500A (en) * 2009-04-23 2010-11-11 Sumitomo Electric Ind Ltd Laser welding method
    DE102010014325B4 (en) * 2010-04-09 2018-07-05 Federal-Mogul Ignition Gmbh Method of manufacturing a spark plug and spark plug made thereby
    CN113063162B (en) * 2021-04-08 2022-05-10 安徽汉先智能科技有限公司 Electronic ignition control system for ball welding type bonding machine

    Family Cites Families (15)

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    Publication number Priority date Publication date Assignee Title
    DE3801688C2 (en) * 1988-01-21 1999-04-08 Truetzschler Gmbh & Co Kg Belt guide channel
    DE3821688A1 (en) 1988-06-28 1990-01-04 Kuhnert Dieter Dr Ing Spark electrodes (ignition electrodes) in a spark plug with a front chamber
    JP3043475B2 (en) * 1991-07-26 2000-05-22 日本特殊陶業株式会社 Spark plug manufacturing method
    US5250778A (en) * 1991-10-23 1993-10-05 General Motors Corporation Method and apparatus for welding pad material to a spark plug electrode
    JPH05234662A (en) * 1991-12-27 1993-09-10 Ngk Spark Plug Co Ltd Electrode for spark plug and its manufacture
    EP0549368B1 (en) * 1991-12-27 1998-05-27 Ngk Spark Plug Co., Ltd An electrode for a spark plug and a method of manufacturing the same
    US5456624A (en) * 1994-03-17 1995-10-10 Alliedsignal Inc. Spark plug with fine wire rivet firing tips and method for its manufacture
    US5558575A (en) * 1995-05-15 1996-09-24 General Motors Corporation Spark plug with platinum tip partially embedded in an electrode
    JP3121309B2 (en) * 1998-02-16 2000-12-25 株式会社デンソー Spark plugs for internal combustion engines
    DE19817391A1 (en) * 1998-04-20 1999-10-21 Daimler Chrysler Ag Spark plug for an internal combustion engine or sensor element for the ignition and combustion process
    US6346766B1 (en) * 1998-05-20 2002-02-12 Denso Corporation Spark plug for internal combustion engine and method for manufacturing same
    JP2000306654A (en) * 1999-04-16 2000-11-02 Ngk Spark Plug Co Ltd Manufacture for spark plug, and spark plug
    JP3364746B2 (en) * 1999-04-26 2003-01-08 日本特殊陶業株式会社 Spark plug manufacturing method and spark plug
    JP3361479B2 (en) * 1999-04-30 2003-01-07 日本特殊陶業株式会社 Manufacturing method of spark plug
    DE10149630C1 (en) 2001-10-09 2003-10-09 Beru Ag Spark plug and process for its manufacture

    Also Published As

    Publication number Publication date
    DE50201666D1 (en) 2005-01-05
    ES2229037T3 (en) 2005-04-16
    US6791246B2 (en) 2004-09-14
    DE10149630C1 (en) 2003-10-09
    ATE284085T1 (en) 2004-12-15
    JP2003120931A (en) 2003-04-23
    EP1303014A1 (en) 2003-04-16
    US20030085202A1 (en) 2003-05-08

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