EP1182404B1 - 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
EP1182404B1
EP1182404B1 EP01114601A EP01114601A EP1182404B1 EP 1182404 B1 EP1182404 B1 EP 1182404B1 EP 01114601 A EP01114601 A EP 01114601A EP 01114601 A EP01114601 A EP 01114601A EP 1182404 B1 EP1182404 B1 EP 1182404B1
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EP
European Patent Office
Prior art keywords
glow plug
plug body
heating rod
crimping
joining
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
EP01114601A
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German (de)
French (fr)
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EP1182404A1 (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
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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 rod a glow plug with the glow plug body, wherein the Heating rod inserted into the axial bore of the glow plug body is and by a radial force on the glow plug body a central interference fit between the glow plug body and the heating element is generated.
  • the heating element to connect a glow plug to the glow plug body thereby that on the Schustabober Design several circumferential grooves be applied and this with a temperature resistant Liquid to be filled. After inserting the heating element in the glow plug body is from the outside of the glow plug body Body material pressed into the grooves of the heating element. Around To make this connection dense it is necessary, in addition to use the heat-resistant liquid.
  • JP-A-01046520 it is also known to connect the glow plug body to the heating rod by deforming both parts inwardly by a radial force.
  • the heating element to connect a glow plug to the glow plug body thereby that the heating element on a pressing surface with molded grooves provided and pressed axially into the glow plug body.
  • the heating element of a glow plug with the glow plug body by pressing the heating element in the To connect glow plug body.
  • a hydraulic Pressing device used, which has a centric press fit generated between the heating element and the body.
  • the Heating rod axially from the combustion chamber side glow plug tip ago pressed the glow plug body.
  • the required axial Force on the top of the heating element is strong on the tolerances the body bore and the heating rod diameter and the depending on the surface finish. Since the Vorstehnies of the heating rod from the glow plug body an essential parameter the function of the glow plug in assembly and engine operation, the press-fit path must be monitored during assembly.
  • the high press-in force is especially in thin and relatively long heating rods the risk of damaging the Heating rod by buckling, tilting, scoring or deformation, so that the pressing force a predetermined maximum value must not exceed. Therefore, the press-in force must be be monitored during the press-fitting process.
  • the Kraftwegüberwachung is technically complex, the long press-in combined with the high press-in forces involves identified risks. For coated heating rods In addition, the coating is destroyed.
  • the object underlying the invention in to provide a method of the type mentioned, with in a simple way a solid and dense axial interference fit can be generated.
  • a particularly preferred embodiment of the invention The method is the subject of claim 2.
  • the heating element 1 is centered in the body 2 positioned, for example, inserted, wherein Diameter of heating element 1 and bore in the body 2 accordingly matched to each other, so that the slot with low power can be done. This is on simple Way the heater 1 is axially aligned; beyond that he very exactly with the least long tolerances axially on the desired Vorstehberger with respect to the body 2 positionable.
  • the crimping region 3 for example by means of a crimping tool according to FIG. 3 of the glow plug body 2 crimped over the heating element 1; preferably extends the crimping region extends axially over a length of about 20 mm.
  • crimping occurs in this area a reduction in diameter of the body 2.
  • the crimping is preferred approximately in the middle above the area of the heating rod 1, the is disposed within the body 2.
  • the crimping tool according to FIG. 3 has a turntable, six crimping 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 zum Verbinden des Heizstabes einer Glühkerze mit dem Glühkerzenkörper, bei dem der Heizstab in die axiale Bohrung des Glühkerzenkörpers eingesetzt wird und durch eine radiale Krafteinwirkung auf den Glühkerzenkörper ein zentraler Presssitz zwischen dem Glühkerzenkörper und dem Heizstab erzeugt wird.The invention relates to a method for connecting the heating rod a glow plug with the glow plug body, wherein the Heating rod inserted into the axial bore of the glow plug body is and by a radial force on the glow plug body a central interference fit between the glow plug body and the heating element is generated.

Ein derartiges Verfahren ist aus der EP 1158245 A1 bekannt.Such a method is known from EP 1158245 A1.

Aus der JP-A-58 000022 ist es weiterhin bekannt, den Heizstab einer Glühkerze mit dem Glühkerzenkörper dadurch zu verbinden, dass auf der Heizstaboberfläche mehrere umlaufende Rillen aufgebracht werden und diese mit einer temperaturbeständigen Flüssigkeit gefüllt werden. Nach dem Einschieben des Heizstabes in den Glühkerzenkörper wird von der Außenseite des Glühkerzenkörpers Körpermaterial in die Rillen des Heizstabes gedrückt. Um diese Verbindung dicht auszugestalten ist es erforderlich, zusätzlich die hitzebeständige Flüssigkeit zu verwenden.From JP-A-58 000022 it is also known, the heating element to connect a glow plug to the glow plug body thereby that on the Heizstaboberfläche several circumferential grooves be applied and this with a temperature resistant Liquid to be filled. After inserting the heating element in the glow plug body is from the outside of the glow plug body Body material pressed into the grooves of the heating element. Around To make this connection dense it is necessary, in addition to use the heat-resistant liquid.

Aus der JP-A-01046520 ist es gleichfalls bekannt dem Glühkerzenkörper mit dem Heizstab dadurch zu Verbinden, dass beide Teile durch eine radiale Kraft nach innen verformt werden.From JP-A-01046520 it is also known to connect the glow plug body to the heating rod by deforming both parts inwardly by a radial force.

Aus der EP-A-0903541 ist es weiterhin bekannt, den Heizstab einer Glühkerze mit dem Glühkerzenkörper dadurch zu verbinden, dass der Heizstab an einer Pressfläche mit angeformten Rillen versehen und axial in den Glühkerzenkörper gepresst wird.From EP-A-0903541 it is also known, the heating element to connect a glow plug to the glow plug body thereby that the heating element on a pressing surface with molded grooves provided and pressed axially into the glow plug body.

Es ist somit vorbekannt, den Heizstab einer Glühkerze mit dem Glühkerzenkörper durch Einpressen des Heizstabes in den Glühkerzenkörper 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 Heizstabsdurchmessers sowie der jeweiligen Oberflächenbeschaffenheit abhängig. Da das Vorstehmaß des Heizstabes von dem Glühkerzenkörper ein wesentlicher Parameter der Funktion der Glühkerze in 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 Einpressvorganges überwacht werden.It is thus already known, the heating element of a glow plug with the glow plug body by pressing the heating element in the To connect glow plug body. For this purpose, a hydraulic Pressing device used, which has a centric press fit generated between the heating element and the body. Usually, the Heating rod axially from the combustion chamber side glow plug tip ago pressed the glow plug body. The required axial Force on the top of the heating element is strong on the tolerances the body bore and the heating rod diameter and the depending on the surface finish. Since the Vorstehmaß of the heating rod from the glow plug body an essential parameter the function of the glow plug in assembly and engine operation, the press-fit path must be monitored during assembly. By The high press-in force is especially in thin and relatively long heating rods the risk of damaging the Heating rod by buckling, tilting, scoring or deformation, so that the pressing force a predetermined maximum value must not exceed. Therefore, the press-in force must be be monitored during the press-fitting process.

Die Kraftwegüberwachung ist technisch aufwendig, wobei der lange Einpressweg verbunden mit den hohen Einpresskräften die aufgezeigten Risiken in sich birgt. Bei beschichteten Heizstäben wird darüber hinaus die Beschichtung zerstört.The Kraftwegüberwachung is technically complex, the long press-in combined with the high press-in forces involves identified risks. For coated heating rods In addition, the coating is destroyed.

Die geschilderten Nachteile treten in dem Maße zunehmend auf, in dem die Glühkerzen bezüglich ihres Heizstabdurchmessers kleiner und die Glühkerzen insgesamt länger werden, was wiederum den Bau raumsparender Motoren begünstigt.The described disadvantages occur increasingly to the extent in which the glow plugs with respect to their Heizstabdurchmessers smaller and the glow plugs get longer overall, which in turn favors the construction of space-saving engines.

Wenn demgegenüber der Heizstab einer Glühkerze mit dem Glühkerzenkörper durch eine radiale Krafteinwirkung verbunden wird, besteht das Problem, den Verbindungsbereich ausreichend abzudichten. Hierzu ist es in der Regel erforderlich, die Außenfläche des Heizstabes durch Bilden von Rillen vorzubehandeln und zusätzlich eine hitzebeständige Flüssigkeit im Verbindungsbereich vorzusehen, um diesen dicht abzuschließen.In contrast, when the heating element of a glow plug with the glow plug body is connected by a radial force, there is the problem of adequately sealing the connection area. For this it is usually required the outer surface pretreatment of the heating rod by forming grooves and In addition, a heat-resistant liquid in the connection area provide to close this tight.

Die der Erfindung zugrunde liegende Aufgabe demgegenüber darin, ein Verfahren der eingangs genannten Art anzugeben, mit dem in einfacher Weise ein fester und dichter axialer Presssitz erzeugt werden kann.In contrast, the object underlying the invention in to provide a method of the type mentioned, with in a simple way a solid and dense axial interference fit can be generated.

Diese Aufgabe wir durch das Verfahren nach dem Patentanspruch 1 gelöst.We accomplish this task by the method according to the claim 1 solved.

Ein besonders bevorzugtes Ausführungsbeispiel des erfindungsgemäßen Verfahrens ist Gegenstand des Anspruchs 2. A particularly preferred embodiment of the invention The method is the subject of claim 2.

Im Folgenden wird das erfindungsgemäße Verfahren anhand der zugehörigen Zeichnung näher beschrieben.

  • Figur 1 zeigt eine schematische Längsschnittansicht durch eine Glühkerze vor der Verbindung des Heizstabes mit dem Glühkerzenkörper,
  • Figur 2 zeigt eine schematische Längsschnittansicht durch die Glühkerze nach Figur 1 nach der Verbindung des Heizstabes mit dem Glühkerzenkörper und
  • Figur 3 ist eine schematische Darstellung eines Werkzeugs für das erfindungsgemäße Verfahren.
    • The method according to the invention is described in more detail below with reference to the accompanying drawing.
  • FIG. 1 shows a schematic longitudinal sectional view through a glow plug before the connection of the heating rod to the glow plug body,
  • Figure 2 shows a schematic longitudinal sectional view through the glow plug of Figure 1 after the connection of the heating element with the glow plug body and
  • Figure 3 is a schematic representation of a tool for the inventive method.

    • 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 is centered in the body 2 positioned, for example, inserted, wherein Diameter of heating element 1 and bore in the body 2 accordingly matched to each other, so that the slot with low power can be done. This is on simple Way the heater 1 is axially aligned; beyond that he very exactly with the least long tolerances axially on the desired Vorstehmaß with respect to the body 2 positionable.

    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, in the crimping region 3, for example by means of a crimping tool according to FIG. 3 of the glow plug body 2 crimped over the heating element 1; preferably extends the crimping region extends axially over a length of about 20 mm. When crimping occurs in this area a reduction in diameter of the body 2. The crimping is preferred approximately in the middle above the area of the heating rod 1, the is disposed within 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 crimping 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 by the invention process, a very precise concentricity results; Damage to the heating element, such as kinking or deformation did not occur on coated Heating rods, the coating was undamaged. In the simple method is a force-distance monitoring unnecessary, wherein the invention radially transmitting Forces, overall, involve fewer manufacturing risks.

    Claims (2)

    1. Method of joining the heating rod (1) of a glow plug to the glow plug body (2), in which the heating rod (1) is inserted into the axial bore in the glow plug body (2) and a central press fit is produced between the glow plug body (2) and the heating rod (1) by applying radial force to the glow plug body (2), characterised in that the radial force is exerted by crimping a crimping region (3) of the glow plug body (2) over the heating rod (1), in which the heating rod (1) is held centrally in the glow plug body (2) and the glow plug body (2) is squeezed together in the crimping region (3) by means of a crimping tool with six crimping jaws (4) and six keys (5), and crimping is effected approximately centrally in the region of the heating rod (1) arranged in the glow plug body (2).
    2. Method according to claim 1, characterised in that the crimping region (3) has an axial extent of approximately 20 mm.
    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 EP1182404A1 (en) 2002-02-27
    EP1182404B1 true 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)

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    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)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    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
    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

    Families Citing this family (4)

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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
    DE102016108592B4 (en) 2016-05-10 2018-06-28 Borgwarner Ludwigsburg Gmbh Glow plug and method of manufacturing a glow plug

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    JPS559460Y2 (en) * 1977-06-30 1980-03-01
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    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    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
    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

    Also Published As

    Publication number Publication date
    KR100810042B1 (en) 2008-03-05
    ES2249357T3 (en) 2006-04-01
    DE10041282A1 (en) 2002-03-21
    DE10041282B4 (en) 2005-02-10
    US6723959B2 (en) 2004-04-20
    EP1182404A1 (en) 2002-02-27
    DE50108283D1 (en) 2006-01-12
    KR20020015646A (en) 2002-02-28
    JP2002106842A (en) 2002-04-10
    ATE312318T1 (en) 2005-12-15
    US20020036193A1 (en) 2002-03-28

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