WO2008015179A1 - Verfahren zum aufbringen eines stiftes auf einem elektrodengrundkörper - Google Patents
Verfahren zum aufbringen eines stiftes auf einem elektrodengrundkörper Download PDFInfo
- Publication number
- WO2008015179A1 WO2008015179A1 PCT/EP2007/057799 EP2007057799W WO2008015179A1 WO 2008015179 A1 WO2008015179 A1 WO 2008015179A1 EP 2007057799 W EP2007057799 W EP 2007057799W WO 2008015179 A1 WO2008015179 A1 WO 2008015179A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pin
- base body
- electrode base
- electrode
- diameter
- Prior art date
Links
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
-
- 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
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/39—Selection of materials for electrodes
Definitions
- the invention is based on a method for applying a pin made of a spark erosion-resistant material to an electrode base body according to the preamble of claim 1.
- a pin of precious metal e.g. made of platinum, gold iridium, palladium, rhodium ruthenium or an alloy of one or more of these metals, cut from a noble metal wire, laid with the length of the section on the flat face of the electrode body and welded by means of resistance welding to the electrode body.
- an over the axial length attacking, directed to the electrode main body pressure force is applied to the welded pin and the pin plastically deformed into a coin-like flat disc.
- the plastically deformed flat disc is again welded in the resistance welding process to set any portion of the coin-like flat disc on the electrode body.
- the inventive method with the features of claim 1 has the advantage that on the one hand due to the small pin diameter when welding the pin on the electrode body only a small amount of expensive, spark erosion resistant material for fixing the pin is melted on the electrode body and on the other hand by the subsequent upsetting the welded-on pin an increase in the diameter of the pin is achieved, with which a correspondingly large end face of the pin, which is exposed to the spark erosion associated. A large end face of the pin in turn increases the life of the pen. Compared to the welding of a pin, the already has the desired large diameter, a much smaller amount of spark erosion resistant material is needed. The concomitant with the upsetting shortening of the pin is compensated by appropriate provision of the pin output length.
- FIG. 1 shows a side view of a spark plug for an internal combustion engine with an electrode and a ground electrode
- FIG. 2 shows an enlarged illustration of an end section of the electrode with electrode base body and compressed noble metal pin
- FIG. 3 is a same view as in Fig. 2 before upsetting the noble metal pin by means of a compression tool
- Fig. 4 are each a same view as in Fig. 2 with a modified design to 6 of the compressed noble metal pin.
- the spark plug shown in Fig. 1 comprises in a known manner a metallic housing 11 with a screw thread 12 and a mounting sleeve 13 and an insulator 14 of, for example, an Al 2 ⁇ 3 ceramic.
- the electrode 15 has an electrode base body 16 and a protruding from the electrode body 16 pin 17 of electrically conductive material.
- the end section 161 of the cylindrical electrode base body 16 is designed as a cone or truncated cone, on whose smaller-diameter top surface the pin 17 is welded. Pin 17 and end portion 161 of the electrode base 16 protrude from the insulator 14 at the bottom of the housing 11.
- a connected to the housing 11 ground electrode 18 is the free end face 172 of the pin 17 while leaving a gap 19 to form a spark gap.
- the electrode 15 is electrically conductively connected to a remote from the pin 17 end of the insulator 14 from this projecting terminal pin 20.
- the pin 17 is made of spark erosion resistant material and welded onto the end portion 161 of the electrode base body 16. This material may be a precious metal, ie one or more metals from the group of platinum, iridium, palladium, rhodium ruthenium or alloys thereof.
- the end face of the pin 17 which is available for wear due to spark erosion, influences the service life of the spark plug. It is therefore trying to perform the pen with the largest possible diameter.
- a part of the pin length is melted and serves for fixing with the electrode base body 16.
- the thicker the pin the greater the amount of spark erosion resistant material that is melted when welding the pin 17 for fixing. Since this material is relatively expensive, the diameter size of the pin 17 are set for cost reasons limits.
- the pin 17 is applied to the electrode body 16 by the following procedure:
- the pin 17 is placed with an output sounds 1 A (Fig. 3) with its one end face 171 on the flat end face of the end portion 161 of the electrode body 16 and welded thereto.
- the welding method used is the per se known laser welding method or the electron welding method.
- a compression tool 21 (FIG. 3) is placed on the free, other end face 172 of the pin 17 welded onto the electrode base body 16 and the pin 17 is dipped by applying a pressing force directed towards the electrode base body 16 such that its initial diameter d A (FIG. FIG. 3) to the desired final diameter d E (FIG. 2).
- a pen diameter magnification of 5% to 80%, preferably between 20% and 50% is desired.
- the initial length 1 A of the pin 17 (FIG. 3) is dimensioned such that when the desired end diameter d E of the pin 17 is reached, the desired end length 1 E of the pin 17 is also established.
- a diameter d A between 0.3 to 2.5 mm and a length 1 A between 0.5 to 2.5 mm is selected.
- the pin 17 with its administratabmesssitch has in the illustrated embodiment
- the free, flat end face 172 of the pin 17 can additionally be contoured during upsetting. Examples of deformation of the flat output face 172 of the pin 17 ( Figure 3) are shown in Figures 4-6. By deformation during upsetting of the pin 17, the end face 172 can receive a convex (FIG. 4), a concave (FIG. 5) or a notched (FIG. 6) contour.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Spark Plugs (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/227,750 US8558440B2 (en) | 2006-08-04 | 2007-07-27 | Method for applying a pin on an electrode base body |
EP07788013A EP2050172A1 (de) | 2006-08-04 | 2007-07-27 | Verfahren zum aufbringen eines stiftes auf einem elektrodengrundkörper |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006036440.6A DE102006036440B4 (de) | 2006-08-04 | 2006-08-04 | Verfahren zum Aufbringen eines Stiftes auf einen Elektrodengrundkörper, Verfahren zur Herstellung einer Zündkerze sowie eine Zündkerze |
DE102006036440.6 | 2006-08-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008015179A1 true WO2008015179A1 (de) | 2008-02-07 |
Family
ID=38531764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/057799 WO2008015179A1 (de) | 2006-08-04 | 2007-07-27 | Verfahren zum aufbringen eines stiftes auf einem elektrodengrundkörper |
Country Status (6)
Country | Link |
---|---|
US (1) | US8558440B2 (de) |
EP (1) | EP2050172A1 (de) |
CN (1) | CN101501948A (de) |
DE (1) | DE102006036440B4 (de) |
RU (1) | RU2009107492A (de) |
WO (1) | WO2008015179A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5616946B2 (ja) * | 2012-11-28 | 2014-10-29 | 日本特殊陶業株式会社 | スパークプラグ |
DE102014225402A1 (de) * | 2014-12-10 | 2016-06-16 | Robert Bosch Gmbh | Zündkerzenelektrode mit Tiefschweißnaht sowie Zündkerze mit der Zündkerzenelektrode und Herstellungsverfahren für die Zündkerzenelektrode |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4840594A (en) * | 1988-06-06 | 1989-06-20 | Allied-Signal Inc. | Method for manufacturing electrodes for a spark plug |
EP0435202A2 (de) * | 1989-12-27 | 1991-07-03 | Nippondenso Co., Ltd. | Zündkerze für Verbrennungsmotor |
US5527198A (en) * | 1994-02-08 | 1996-06-18 | General Motors Corporation | High efficiency, extended life spark plug having shaped firing tips |
US6132277A (en) * | 1998-10-20 | 2000-10-17 | Federal-Mogul World Wide, Inc. | Application of precious metal to spark plug electrode |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2847681B2 (ja) * | 1991-12-03 | 1999-01-20 | 日本特殊陶業株式会社 | スパークプラグの中心電極の製造方法 |
DE102005015413A1 (de) * | 2005-04-04 | 2006-10-05 | Beru Ag | Verfahren und Vorrichtung zum Herstellen einer edelmetallarmierten Elektrode für eine Zündkerze |
-
2006
- 2006-08-04 DE DE102006036440.6A patent/DE102006036440B4/de not_active Expired - Fee Related
-
2007
- 2007-07-27 CN CNA2007800290125A patent/CN101501948A/zh active Pending
- 2007-07-27 WO PCT/EP2007/057799 patent/WO2008015179A1/de active Application Filing
- 2007-07-27 EP EP07788013A patent/EP2050172A1/de not_active Withdrawn
- 2007-07-27 US US12/227,750 patent/US8558440B2/en not_active Expired - Fee Related
- 2007-07-27 RU RU2009107492/07A patent/RU2009107492A/ru not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4840594A (en) * | 1988-06-06 | 1989-06-20 | Allied-Signal Inc. | Method for manufacturing electrodes for a spark plug |
EP0435202A2 (de) * | 1989-12-27 | 1991-07-03 | Nippondenso Co., Ltd. | Zündkerze für Verbrennungsmotor |
US5527198A (en) * | 1994-02-08 | 1996-06-18 | General Motors Corporation | High efficiency, extended life spark plug having shaped firing tips |
US6132277A (en) * | 1998-10-20 | 2000-10-17 | Federal-Mogul World Wide, Inc. | Application of precious metal to spark plug electrode |
Also Published As
Publication number | Publication date |
---|---|
US20090309476A1 (en) | 2009-12-17 |
US8558440B2 (en) | 2013-10-15 |
RU2009107492A (ru) | 2010-09-10 |
DE102006036440B4 (de) | 2015-08-27 |
CN101501948A (zh) | 2009-08-05 |
EP2050172A1 (de) | 2009-04-22 |
DE102006036440A1 (de) | 2008-02-07 |
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