EP1182404A1 - Method for joining a heating rod and a glow plug body - Google Patents

Method for joining a heating rod and a glow plug body Download PDF

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Publication number
EP1182404A1
EP1182404A1 EP01114601A EP01114601A EP1182404A1 EP 1182404 A1 EP1182404 A1 EP 1182404A1 EP 01114601 A EP01114601 A EP 01114601A EP 01114601 A EP01114601 A EP 01114601A EP 1182404 A1 EP1182404 A1 EP 1182404A1
Authority
EP
European Patent Office
Prior art keywords
glow plug
heating element
plug body
crimping
area
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
EP01114601A
Other languages
German (de)
French (fr)
Other versions
EP1182404B1 (en
Inventor
Rudi Heinz
Rainer Hain
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 EP1182404A1 publication Critical patent/EP1182404A1/en
Application granted granted Critical
Publication of EP1182404B1 publication Critical patent/EP1182404B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines

Definitions

  • the invention relates to a method for connecting the Heating element of a glow plug with its glow plug body. It is previously known to use the heating element of a glow plug Glow plug body by pressing the heating element into the Body to connect. For this purpose, a hydraulic press-in device used a central press fit between Heating element and body generated. Usually the Heating rod axially from the glow plug tip on the combustion chamber side pressed into the glow plug body. The necessary for this axial force on the tip of the heating element is strong the tolerances of the body bore and the heating rod diameter as well as the respective surface condition.
  • the press-in must during the assembly are monitored; due to the high press-in force exists especially in thin and relatively long Heating rods the risk of damage to the heating rod by buckling, tipping, scoring or deformation, so that the press-in force has a predetermined maximum value must not exceed. Therefore, the press-in force must also be monitored during the press-in process.
  • the heating element 1 becomes centered in the body 2 positioned held, for example inserted, wherein Diameter of heating rod 1 and hole in body 2 accordingly are coordinated so that the insert with low force can take place.
  • Diameter of heating rod 1 and hole in body 2 accordingly are coordinated so that the insert with low force can take place.
  • 3 is in the crimp area the glow plug body by means of a crimping tool according to FIG 2 crimped over the heating element 1; preferably extends the crimp area extends axially over a length of approximately 20 mm. The diameter is reduced in this area during the crimping process of body 2. Crimping is preferred approximately in the middle over the area of the heating element 1, the is arranged inside the body 2.
  • the crimping tool according to FIG. 3 has a turntable, six crimp jaws 4 and feather key 5.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Automatic Assembly (AREA)

Abstract

The glowplug component connecting process involves joining the heating rod (1) to the glowplug body (2) by creating a radial force acting on the body , thus producing a central press seat between the rod and the body. The seat may be produced by crimping a crimp region of the body over the heating rod, which is thus held in a centered position in the body.

Description

Die Erfindung betrifft ein Verfahren zur Verbindung des Heizstabes einer Glühkerze mit ihrem Glühkerzenkörper. Vorbekannt ist es, den Heizstab einer Glühkerze mit ihrem Glühkerzenkörper durch Einpressen des Heizstabes in den Körper zu verbinden. Hierzu wird eine hydraulische Einpreßvorrichtung eingesetzt, die einen zentrischen Preßsitz zwischen Heizstab und Körper erzeugt. Üblicherweise wird der Heizstab axial von der brennraumseitigen Glühkerzenspitze her in den Glühkerzenkörper eingepreßt. Die hierzu erforderliche axiale Kraft auf die Spitze des Heizstabes ist stark von den Toleranzen der Körperbohrung und des Heizstabdurchmessers sowie der jeweiligen Oberflächenbeschaffenheit abhängig. Da das Vorstehmaß des Heizstabes von dem Glühkerzenkörper ein wesentlicher Parameter der Funktion der Glühkerze im Montage- und Motorbetrieb ist, muß der Einpreßweg während der Montage überwacht werden; durch die hohe Einpreßkraft besteht insbesondere bei dünnen und verhältnismäßig langen Heizstäben die Gefahr einer Beschädigung des Heizstabes durch Ausknicken, Abkippen, Riefenbildung oder Verformung, so daß die Einpreßkraft einen vorbestimmten Maximalwert nicht überschreiten darf. Deshalb muß auch die Einpreßkraft während des Einpreßvorgangs überwacht werden.The invention relates to a method for connecting the Heating element of a glow plug with its glow plug body. It is previously known to use the heating element of a glow plug Glow plug body by pressing the heating element into the Body to connect. For this purpose, a hydraulic press-in device used a central press fit between Heating element and body generated. Usually the Heating rod axially from the glow plug tip on the combustion chamber side pressed into the glow plug body. The necessary for this axial force on the tip of the heating element is strong the tolerances of the body bore and the heating rod diameter as well as the respective surface condition. Because the projection of the heating element from the glow plug body an essential parameter of the function of the glow plug is in assembly and motor operation, the press-in must during the assembly are monitored; due to the high press-in force exists especially in thin and relatively long Heating rods the risk of damage to the heating rod by buckling, tipping, scoring or deformation, so that the press-in force has a predetermined maximum value must not exceed. Therefore, the press-in force must also be monitored during the press-in process.

Die Kraft-Weg-Überwachung ist technisch aufwendig, wobei der lange Einpreßweg, verbunden mit den hohen Einpreßkräften, die aufgezeigten Risiken in sich birgt; bei beschichteten Heizstäben wird darüberhinaus die Beschichtung zerstört.Force-displacement monitoring is technically complex, the long press-in path, combined with the high press-in forces, contains the risks identified; with coated The coating also becomes heating rods destroyed.

Die geschilderten Nachteile des vorbekannten Herstellungsverfahrens treten in dem Maße zunehmend auf, indem die Glühkerzen bezüglich ihres Heizstabdurchmessers kleiner und die Glühkerzen insgesamt länger werden, was wiederum den Bau raumsparender Motoren begünstigt. Ebenso sollen durch ein mögliches neues Verfahren geringere Rundlaufabweichungen erreicht werden; ebenso soll das Verfahren auch für beschichtete Heizstäbe einsetzbar sein.The disadvantages of the known manufacturing process described occur increasingly to the extent that the Glow plugs smaller and smaller in terms of their heating rod diameter the glow plugs become longer overall, which in turn construction space-saving engines favored. Likewise, through a possible new process less runout be achieved; the process is also intended for coated Heating rods can be used.

Die erfindungsgemäße Aufgabe wird durch das Verfahren mit den kennzeichnenden Merkmalen gemäß Anspruch 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den nachfolgenden Ansprüchen 2-4.The object of the invention is achieved by the method solved with the characterizing features according to claim 1. Further advantageous embodiments of the invention result resulting from the following claims 2-4.

Das Verfahren wird an den folgenden Figuren 1-3 erläutert.

  • Figur 1 ist ein schematischer Längsschnitt durch eine Glühkerze vor Verbindung des Heizstabes mit dem Glühkerzenkörper;
  • Figur 2 ist ein schematischer Längsschnitt durch die Glühkerze nach Figur 1 nach Verbindung von Heizstab und Glühkerzenkörper;
  • Figur 3 ist eine schematische Darstellung eines Werkzeugs für das erfindungsgemäße Verfahren.
    • The method is explained in the following Figures 1-3.
  • Figure 1 is a schematic longitudinal section through a glow plug before connection of the heating element to the glow plug body;
  • FIG. 2 is a schematic longitudinal section through the glow plug according to FIG. 1 after connecting the heating element and glow plug body;
  • FIG. 3 is a schematic illustration of a tool for the method according to the invention.

    • Gemäß Figur 1 wird der Heizstab 1 zentrisch im Körper 2 positioniert gehaltert, beispielsweise eingeschoben, wobei Durchmesser von Heizstab 1 und Bohrung im Körper 2 entsprechend aufeinander abgestimmt sind, so daß der Einschub mit geringer Kraft erfolgen kann. Hierbei wird auf einfache Weise der Heizstab 1 axial ausgerichtet; darüberhinaus ist er sehr genau mit geringsten Langentoleranzen axial auf das gewünschte Vorstehmaß bezüglich des Körpers 2 positionierbar.According to FIG. 1, the heating element 1 becomes centered in the body 2 positioned held, for example inserted, wherein Diameter of heating rod 1 and hole in body 2 accordingly are coordinated so that the insert with low force can take place. This is simple Way the heating rod 1 axially aligned; beyond that he very precisely with the smallest length tolerances axially on that desired projection dimension with respect to the body 2 can be positioned.

    Gemäß Figur 2 wird im Crimpbereich 3 beispielsweise mittels eines Crimpwerkzeuges gemäß Figur 3 der Glühkerzenkörper 2 über dem Heizstab 1 vercrimpt; bevorzugt erstreckt sich der Crimpbereich axial über eine Länge von etwa 20 mm. Beim Crimpvorgang erfolgt in diesem Bereich eine Durchmesserverringerung des Körpers 2. Die Vercrimpung erfolgt bevorzugt etwa mittig über dem Bereich des Heizstabes 1, der innerhalb des Körpers 2 angeordnet ist.According to FIG. 2, for example, 3 is in the crimp area the glow plug body by means of a crimping tool according to FIG 2 crimped over the heating element 1; preferably extends the crimp area extends axially over a length of approximately 20 mm. The diameter is reduced in this area during the crimping process of body 2. Crimping is preferred approximately in the middle over the area of the heating element 1, the is arranged inside the body 2.

    Das Crimpwerkzeug gemäß Figur 3 weist eine Drehscheibe, sechs Crimpbacken 4 und Paßfeder 5 auf.The crimping tool according to FIG. 3 has a turntable, six crimp jaws 4 and feather key 5.

    In Versuchen wurde festgestellt, daß sich bei Glühkerzen, die nach dem Erfindungsverfahren gefertigt wurden, ein sehr genauer Rundlauf ergibt; Beschädigungen des Heizstabes, wie Abknicken oder Deformation traten nicht auf.Bei beschichteten Heizstäben blieb die Beschichtung unbeschädigt. Bei dem einfachen Verfahren ist eine Kraft-Weg-Überwachung unnötig, wobei die erfindungsgemäß radial übertragenden Kräfte insgesamt weniger fertigungstechnische Risiken beinhalten.Experiments have shown that glow plugs, which were manufactured according to the inventive method very precise concentricity results; Damage to the heating element, such as kinking or deformation did not occur The coating remained undamaged on heating rods. The simple method is a force-displacement monitoring unnecessary, the radially transmitting according to the invention Overall, forces contain fewer manufacturing risks.

    Claims (6)

    Verfahren zum Verbinden des Heizstabes einer Glühkerze mit ihrem Glühkerzenkörper, dadurch gekennzeichnet, daß man durch radiale Krafteinwirkung auf den Glühkerzenkörper (1) einen zentrischen Preßsitz zwischen Heizstab (1) und Glühkerzenkörper (2) erzeugt.Method for connecting the heating element of a glow plug to its glow plug body, characterized in that a centric interference fit between the heating element (1) and glow plug body (2) is produced by the radial force acting on the glow plug body (1). Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man den zentrischen Preßsitz durch Vercrimpen eines Crimpbereichs (3) des Körpers (2) über dem Heizstab (1) erzeugt, wobei der Heizstab (1) zentriert im Körper (2) gehalten wird, und wobei die resultierende Vercrimpung etwa mittag in dem Bereich des Heizstabes (1) stattfindet, der innerhalb des Körpers (2) angeordnet ist.Method according to claim 1, characterized in that the central press fit is produced by crimping a crimping area (3) of the body (2) over the heating element (1), the heating element (1) being held centered in the body (2), and wherein the resulting crimping takes place around noon in the area of the heating element (1) which is arranged inside the body (2). Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Crimpbereich (3) eine axiale Erstreckung von etwa 20 mm aufweist.Method according to claim 2, characterized in that the crimping area (3) has an axial extent of approximately 20 mm. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man das Verfahren auf einem ansich bekannten Crimpwerkzeug mit sechs Crimpbacken (4) und 6 Paßfedern (5) durchführt.Method according to one of the preceding claims, characterized in that the method is carried out on a crimping tool known per se with six crimping jaws (4) and 6 feather keys (5). Glühkerze mit Heizstab und Glühkerzenkörper, dadurch gekennzeichnet, daß der Heizstab (1) mit dem Glühkerzenkörper (2) durch radiale Krafteinwirkung auf den Glühkerzenkörper (2) verbunden worden ist.Glow plug with heating element and glow plug body, characterized in that the heating element (1) has been connected to the glow plug body (2) by the radial force acting on the glow plug body (2). Glühkerze nach Anspruch 5, dadurch gekennzeichnet, daß Heizstab (1) und Glühkerzenkörper (2) durch Crimpen des Glühkerzenkörpers (2) im Crimpbereich (3) etwa mittig über dem Bereich des Heizstabes (1), der vom Glühkerzenkörper (2) umgeben ist, verbunden sind.Glow plug according to claim 5, characterized in that the heating element (1) and glow plug body (2) are crimped by the glow plug body (2) in the crimping area (3) approximately centrally over the area of the heating element (1) which is surrounded by the glow plug body (2), are connected.
    EP01114601A 2000-08-22 2001-06-18 Method for joining a heating rod and a glow plug body Expired - Lifetime EP1182404B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10041282 2000-08-22
    DE10041282A DE10041282B4 (en) 2000-08-22 2000-08-22 Method for connecting a heating rod of a glow plug with its glow plug body and a corresponding glow plug

    Publications (2)

    Publication Number Publication Date
    EP1182404A1 true EP1182404A1 (en) 2002-02-27
    EP1182404B1 EP1182404B1 (en) 2005-12-07

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01114601A Expired - Lifetime EP1182404B1 (en) 2000-08-22 2001-06-18 Method for joining a heating rod and a glow plug body

    Country Status (7)

    Country Link
    US (1) US6723959B2 (en)
    EP (1) EP1182404B1 (en)
    JP (1) JP2002106842A (en)
    KR (1) KR100810042B1 (en)
    AT (1) ATE312318T1 (en)
    DE (2) DE10041282B4 (en)
    ES (1) ES2249357T3 (en)

    Families Citing this family (6)

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    Publication number Priority date Publication date Assignee Title
    DE10117641C2 (en) * 2001-04-09 2003-02-27 Beru Ag glow plug
    JP4087303B2 (en) * 2002-07-19 2008-05-21 日本特殊陶業株式会社 Glow plug manufacturing method and glow plug manufacturing apparatus
    US6900412B2 (en) * 2002-08-12 2005-05-31 Ngk Spark Plug Co., Ltd. Glow plug
    DE102009025352A1 (en) 2009-06-16 2011-01-27 Felss Gmbh Device for reshaping heating rod for glow plug of diesel engine, has feed unit and clamping device, whose rotary direction and speed are selected based on rotation speed of reshaping tools so that workpiece compensating movement is produced
    DE202009008412U1 (en) 2009-06-16 2009-10-15 Felss Gmbh Device for forming a rod-shaped or tubular workpiece, in particular a heating rod for a glow plug for a diesel engine
    DE102016108592B4 (en) 2016-05-10 2018-06-28 Borgwarner Ludwigsburg Gmbh Glow plug and method of manufacturing a glow plug

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    JPS5822A (en) * 1981-06-24 1983-01-05 Ngk Spark Plug Co Ltd Connection of glow tube to fixture of sheath type glow plug
    EP0903541A2 (en) * 1997-09-19 1999-03-24 Denso Corporation Glow plug
    EP1158245A1 (en) * 2000-05-26 2001-11-28 Federal-Mogul Ignition Srl Glow plug for diesel engines and process for its manufacture

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    JPS5822A (en) * 1981-06-24 1983-01-05 Ngk Spark Plug Co Ltd Connection of glow tube to fixture of sheath type glow plug
    EP0903541A2 (en) * 1997-09-19 1999-03-24 Denso Corporation Glow plug
    EP1158245A1 (en) * 2000-05-26 2001-11-28 Federal-Mogul Ignition Srl Glow plug for diesel engines and process for its manufacture

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    Title
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    Also Published As

    Publication number Publication date
    JP2002106842A (en) 2002-04-10
    KR100810042B1 (en) 2008-03-05
    ATE312318T1 (en) 2005-12-15
    DE10041282A1 (en) 2002-03-21
    US20020036193A1 (en) 2002-03-28
    DE10041282B4 (en) 2005-02-10
    EP1182404B1 (en) 2005-12-07
    ES2249357T3 (en) 2006-04-01
    KR20020015646A (en) 2002-02-28
    DE50108283D1 (en) 2006-01-12
    US6723959B2 (en) 2004-04-20

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