JP3426051B2 - Manufacturing method of spark plug - Google Patents
Manufacturing method of spark plugInfo
- Publication number
- JP3426051B2 JP3426051B2 JP10391095A JP10391095A JP3426051B2 JP 3426051 B2 JP3426051 B2 JP 3426051B2 JP 10391095 A JP10391095 A JP 10391095A JP 10391095 A JP10391095 A JP 10391095A JP 3426051 B2 JP3426051 B2 JP 3426051B2
- Authority
- JP
- Japan
- Prior art keywords
- spark
- resistant
- corrosion
- metal member
- precious metal
- 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 - Fee Related
Links
Landscapes
- Arc Welding In General (AREA)
- Laser Beam Processing (AREA)
- Spark Plugs (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内燃機関のスパークプ
ラグの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a spark plug for an internal combustion engine.
【０００２】[0002]
【従来の技術】従来、内燃機関のスパークプラグとし
て、Ｉｒを含んだ白金合金、Ｙ2 Ｏ3 等の希土類元素酸
化物を少量添加したＩｒ、Ｗを含む合金などの耐火花消
耗電極材を中心電極の先端部に設けて、耐久性を向上さ
せたものがある。これらのものでは、耐火花消耗電極材
が難溶接性材であるため、中心電極の母材としての耐蝕
性非貴金属製部材（例えばＣｒを含んだＮｉ合金）に耐
火花消耗電極材を接合する際には、十分な接合強度を確
保するために、ＴＩＧ溶接またはレーザ溶接によって溶
融接合している。2. Description of the Related Art Conventionally, a spark consumable electrode material such as a platinum alloy containing Ir, an alloy containing Ir or W containing a small amount of a rare earth element oxide such as Y 2 O 3 has been mainly used as a spark plug for an internal combustion engine. There is an electrode provided at the tip of the electrode to improve durability. In these materials, since the spark-resistant consumable electrode material is a material that is difficult to weld, the spark-resistant consumable electrode material is joined to a corrosion-resistant non-precious metal member (for example, a Ni alloy containing Cr) as the base material of the center electrode. At this time, in order to secure a sufficient joint strength, fusion welding is performed by TIG welding or laser welding.
【０００３】[0003]
【発明が解決しようとする課題】このように、耐火花消
耗電極材を用いるとスパークプラグの耐久性が向上する
ため、耐火花消耗電極材を外側電極にも用いることが望
まれる。しかし、外側電極の火花放電部をなす先端側面
は平面を呈しているものが多く、こうした平面状の火花
放電部を形成した外側電極に、十分な接合強度が得られ
るＴＩＧ溶接またはレーザ溶接によって耐火花消耗電極
材を溶融接合することは困難である。このため、耐火花
消耗電極材を十分な接合強度を持たせて外側電極に接合
させることができないという問題がある。As described above, since the durability of the spark plug is improved by using the spark-resistant consumable electrode material, it is desirable to use the spark-resistant consumable electrode material also for the outer electrode. However, the tip side surface forming the spark discharge part of the outer electrode is often flat, and the outer electrode formed with such a flat spark discharge part can be welded by TIG welding or It is difficult to melt-bond spark-resistant consumable electrode materials by laser welding. Therefore, there is a problem in that the spark-resistant consumable electrode material cannot be bonded to the outer electrode with sufficient bonding strength.
【０００４】本発明は、耐火花消耗電極材を外側電極に
も用いることによってスパークプラグの耐久性の向上を
図ることを目的とする。An object of the present invention is to improve the durability of the spark plug by using the spark-resistant consumable electrode material also for the outer electrode.
【０００５】[0005]
【課題を解決するための手段】本発明の請求項１は、少
なくとも外側電極の先端側面に、耐火花消耗電極材を設
けたスパークプラグの製造方法において、棒状の耐蝕性
非貴金属製部材の先端に、チップ状の耐火花消耗電極材
をＴＩＧ溶接或いはレーザ溶接の溶融接合法により接合
する第１工程と、該第１工程により得られた複合電極材
の前記耐蝕性非貴金属製部材を適当寸法にカットする第
２工程と、該第２工程により得られた複合電極チップの
前記耐蝕性非貴金属製部材側を、Ｎｉ合金或いはＮｉ合
金外皮とＣｕ若しくはＣｕ合金芯部の複合金属からなる
外側電極の火花放電間隙側に溶接する第３工程とを含ん
だことを技術的手段とする。Claim 1 of the present invention According to an aspect of the small
In a method of manufacturing a spark plug in which a spark-resistant consumable electrode material is provided on the tip side of at least the outer electrode, a tip-shaped spark-resistant consumable electrode material is TIG-welded or laser-welded to the tip of a rod-shaped corrosion-resistant non-precious metal member. Obtained by the first step of joining by the fusion joining method of 1., the second step of cutting the corrosion-resistant non-precious metal member of the composite electrode material obtained by the first step to an appropriate size, and the second step. A third step of welding the corrosion resistant non-precious metal member side of the composite electrode tip to the spark discharge gap side of the outer electrode made of the composite metal of the Ni alloy or Ni alloy skin and Cu or Cu alloy core. That is the technical means.
【０００６】請求項２のスパークプラグの製造方法は、
請求項１において、前記耐蝕性非貴金属製部材の径を前
記耐火花消耗電極材の径より少し大きくしたことを技術
的手段とする。A method of manufacturing a spark plug according to claim 2 is
The technical means according to claim 1 , wherein the diameter of the corrosion-resistant non-precious metal member is slightly larger than the diameter of the spark-resistant consumable electrode material.
【０００７】請求項３のスパークプラグの製造方法は、
前記耐火花消耗電極材として、２０重量％以上のＩｒを
含んだ白金合金、希土類元素酸化物を５重量％以下含ん
だＩｒ合金、９５重量％以上のＷからなる合金のいずれ
かよりなるチップを前記耐蝕性非貴金属製部材に接合し
てなることを技術的手段とする。請求項４のスパークプ
ラグの製造方法は、前記耐蝕性非貴金属製部材として、
１３重量％以上のＣｒを含んだＮｉ合金を使用したこと
を技術的手段とする。A method of manufacturing a spark plug according to claim 3 is
As the spark-resistant consumable electrode material, a tip made of any one of a platinum alloy containing 20 wt% or more of Ir, an Ir alloy containing 5 wt% or less of rare earth element oxide, and an alloy of 95 wt% or more of W is used. The technical means is to be joined to the corrosion resistant non-precious metal member. The method of manufacturing a spark plug according to claim 4 , wherein the corrosion-resistant non-precious metal member is:
The technical means is to use a Ni alloy containing 13% by weight or more of Cr.
【０００８】[0008]
【作用】本発明は、請求項１では、スパークプラグの製
造方法において、第１工程として、棒状の耐蝕性非貴金
属製部材の先端にチップ状の耐火花消耗電極材を接合す
る。この工程では、棒状の耐蝕性非貴金属製部材とチッ
プ状の耐火花消耗電極材との接合を行うため、接合方法
として、接合部の全周囲から熱を与える溶接を用いるこ
とができるため、ＴＩＧ溶接或いはレーザ溶接の溶融接
合法を用いることができ、それによって難溶接性の耐火
花消耗電極材と耐蝕性非貴金属製部材とを十分な接合強
度で溶接させることができる。According to the first aspect of the present invention, in the method for manufacturing a spark plug, as a first step, a tip-shaped spark-resistant consumable electrode material is joined to the tip of a rod-shaped corrosion-resistant non-precious metal member. In this step, since the rod-shaped corrosion-resistant non-precious metal member and the chip-shaped spark-resistant consumable electrode material are joined, welding that applies heat from the entire periphery of the joint can be used as the joining method. fusion bonding method of welding or laser welding can be used, whereby a flame weldability spark consumable electrode material and corrosion resistance non noble metal member can be welded with a sufficient bonding strength.
【０００９】第１工程で耐火花消耗電極材と耐蝕性非貴
金属製部材とが接合された複合電極材の耐蝕性非貴金属
製部材を適当寸法にカットする第２工程の後、第３工程
では、第２工程により得られた複合電極チップの耐蝕性
非貴金属製部材側を、Ｎｉ合金或いはＮｉ合金とＣｕ若
しくはＣｕ合金の複合金属からなる外側電極の火花放電
間隙側に溶接する。ここで、外側電極の材質は、耐蝕性
非貴金属製部材との接合が容易なＮｉ合金或いはＮｉ合
金外皮とＣｕ或いはＣｕ合金芯部の複合金属であるた
め、特に接合強度の大きなＴＩＧ溶接或いはレーザ溶接
の溶融接合法を用いなくて、通常の抵抗溶接によって十
分な接合強度が確保できる。従って、外側電極のように
平面状の部位での接合であっても、耐蝕性非貴金属製部
材を確実に接合することができる。In the third step, after the second step of cutting the corrosion-resistant non-noble metal member of the composite electrode material in which the spark-resistant consumable electrode material and the corrosion-resistant non-noble metal member are joined in the first step, , welding the corrosion resistance non noble metal member side of the composite electrode chips obtained by the second step, the spark discharge gap side of the outer electrode comprising a composite metal N i alloy or Ni alloy and Cu or Cu alloy. Here, the material of the outer side electrodes are the composite metal bonding easy Ni alloy or Ni alloy outer skin and Cu or Cu alloy core of the corrosion-resistant non-noble metal member, in particular the size of the bonding strength Do TIG welding or laser welding
Sufficient bonding strength can be secured by ordinary resistance welding without using the fusion bonding method of. Therefore, the corrosion-resistant non-precious metal member can be reliably bonded even when bonding is performed at a flat portion such as the outer electrode.
【００１０】請求項２では、耐蝕性非貴金属製部材の径
を耐火花消耗電極材の径より大きくしたため、複合電極
チップの耐火花消耗電極材側を、外側電極に溶接する際
に、作業がし易い。請求項４では、耐蝕性非貴金属製部
材として、１３重量％以上のＣｒを含んだＮｉ合金を使
用しているため、外側電極と複合電極チップの耐蝕性非
貴金属製部材側との溶接を、通常の抵抗溶接等によって
確実に行うことができる。[0010] In claim 2, since the diameter of the corrosion-resistant non-precious metal member is made larger than the diameter of the spark wear electrode material, the spark wear electrode material side of the composite electrode tip, in welding to the outer side electrode, working Easy to peel off. In claim 4 , since the Ni alloy containing 13 wt% or more of Cr is used as the corrosion-resistant non-precious metal member, the welding of the outer electrode and the corrosion-resistant non-precious metal member side of the composite electrode tip is performed. It can be reliably performed by ordinary resistance welding or the like.
【００１１】[0011]
【発明の効果】本発明は、棒状の耐蝕性非貴金属製部材
とチップ状の耐火花消耗電極材との接合を行うため、接
合方法として、接合部の全周囲から熱を与える溶接を用
いることができるため、ＴＩＧ溶接或いはレーザ溶接の
溶融接合法を用いることができ、それによって難溶接性
の耐火花消耗電極材と耐蝕性非貴金属製部材とを十分な
接合強度で溶接させることができる。また、外側電極の
材質は、耐蝕性非貴金属製部材との接合が容易なＮｉ合
金或いはＮｉ合金外皮とＣｕ若しくはＣｕ合金芯部の複
合金属であるため、特に接合強度の大きなＴＩＧ溶接或
いはレーザ溶接の溶融接合法を用いなくて、通常の抵抗
溶接によって十分な接合強度が確保できる。従って、外
側電極のように平面状の部材での接合であっても耐蝕性
非貴金属製部材を確実に接合することができる。According to the present invention, a rod-shaped non-corrosive non-precious metal member and a chip-shaped spark-resistant electrode material for consumable sparks are joined. Therefore, as a joining method, welding that applies heat from the entire periphery of the joined portion is used. since it is, can be used <br/> melt bonding methods TIG welding or laser welding, whereby welding and flame weldability spark consumable electrode material and corrosion resistance non noble metal member with a sufficient bonding strength Can be made. Also, the material of the outer side electrode, since a composite metal bonding easy Ni alloy or Ni alloy outer skin and Cu or Cu alloy core of the corrosion-resistant non-noble metal member, in particular the size of the bonding strength Do TIG welding or without using a fusion bonding method of the laser welding, sufficient bonding strength can be secured by conventional resistance welding. Therefore, even if joining is performed using a planar member such as the outer electrode, the corrosion-resistant non-precious metal member can be reliably joined.
【００１２】[0012]
【実施例】次に本発明を図に示す実施例に基づいて説明
する。図１は、本発明の第１実施例を示すスパークプラ
グ１を示すもので、Ｎｉ合金外皮２ａとＣｕ或いはＣｕ
合金芯部２ｂの複合金属からなる中心電極２の先端と、
無垢のＮｉ合金或いはＮｉ合金外皮３ａとＣｕ若しくは
Ｃｕ合金芯部３ｂの複合金属からなる外側電極３の先端
側面の火花放電間隙側に、それぞれ耐火花消耗電極材２
１、３１が、それぞれ耐蝕性非貴金属製部材２２、３２
を介して設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on the embodiments shown in the drawings. FIG. 1 shows a spark plug 1 showing a first embodiment of the present invention, in which a Ni alloy outer cover 2a and Cu or Cu are used.
A tip of the center electrode 2 made of a composite metal of the alloy core portion 2b,
The tip of the outer electrode 3 made of pure Ni alloy or a composite metal of the Ni alloy skin 3a and Cu or Cu alloy core 3b.
On the side of the spark discharge gap on the side, spark-resistant consumable electrode material 2
1, 31 are corrosion-resistant non-precious metal members 22, 32, respectively
It is provided through.
【００１３】耐火花消耗電極材２１、３１は、例えば、
２０重量％以上のＩｒ（イリジウム）を含んだ白金合
金、Ｙ2 Ｏ3 等の希土類元素酸化物を５重量％以下含有
した９５重量％以上のＩｒからなる合金、或いはＰｔ、
Ｒｕ、Ｒｈを５重量％以下含有した９５重量％以上のＷ
（タングステン）からなる合金等の貴金属からなる。一
方、耐蝕性非貴金属製部材２２、２３は、例えば、耐熱
性、耐蝕性の優れた１３重量％以上のＣｒを含んだＮｉ
合金が好ましいが、その他、熱伝導性の良好な純Ｎｉ或
いはＳｉ、Ｍｎ、Ｃｒ、Ａｌ等の総添加量１０％以下の
Ｎｉ合金を用いることができる。The spark-resistant consumable electrode materials 21 and 31 are, for example,
Platinum alloy containing 20% by weight or more of Ir (iridium), alloy containing 95% by weight or more of Ir containing 5% by weight or less of rare earth element oxide such as Y 2 O 3 , or Pt,
95% by weight or more of W containing less than 5% by weight of Ru and Rh
It consists of a noble metal such as an alloy of (tungsten). On the other hand, the corrosion-resistant non-precious metal members 22 and 23 are, for example, Ni containing 13 wt% or more of Cr, which is excellent in heat resistance and corrosion resistance.
Although an alloy is preferable, pure Ni or a Ni alloy having a total addition amount of 10% or less of Si, Mn, Cr, Al or the like having good thermal conductivity can be used.
【００１４】以上の耐火花消耗電極材２１、３１および
耐蝕性非貴金属製部材２２、３２を有する本実施例のス
パークプラグ１は、以下の方法により製造される。
（１）円柱状の耐火花消耗電極材などをあらかじめ円板
形状に切断して、チップ状耐火花消耗電極材１１を形成
しておく。The spark plug 1 of this embodiment having the spark-resistant consumable electrode materials 21 and 31 and the corrosion-resistant non-precious metal members 22 and 32 is manufactured by the following method. (1) A cylindrical spark-resistant consumable electrode material 11 or the like is previously cut into a disc shape to form a chip-shaped spark-resistant consumable electrode material 11.
【００１５】（２）図２に示すように、その径が上記の
チップ状耐火花消耗電極材１１の径より大きいため、図
２に示すように、ＴＩＧ溶接或いはレーザ溶接の溶接の
ためのビームＢを、接合部の斜め上方から接合面に向け
て照射し、耐蝕性非貴金属製部材１２を回転させること
によって、チップ状耐火花消耗電極材１１と耐蝕性非貴
金属製部材１２とを十分に溶融させて、その接合を確実
なものにすることができる。[0015] (2) As shown in FIG. 2, the diameter O Redirecting a Kiitame the diameter of the chip-like spark wear electrode member 11, as shown in FIG. 2, for welding of TIG welding or laser welding The beam B of the above is irradiated toward the joint surface from diagonally above the joint portion, and the corrosion-resistant non-precious metal member 12 and the corrosion-resistant non-precious metal member 12 are rotated by rotating the corrosion-resistant non-precious metal member 12. It can be melted sufficiently to ensure the bond.
【００１６】（３）図３に示すように、チップ状耐火花
消耗電極材１１と耐蝕性非貴金属製部材１２とが接合さ
れた複合電極材を、カッター４０によって適当寸法に切
断して、図４に示すような複合電極チップ１３を形成す
る。なお、この複合電極チップ１３は、使用されるスパ
ークプラグ１の火花放電ギャップの数に応じた数だけ必
要である。(3) As shown in FIG. 3, the composite electrode material in which the chip-shaped spark-resistant consumable electrode material 11 and the corrosion-resistant non-precious metal member 12 are joined is cut by a cutter 40 to an appropriate size, The composite electrode tip 13 as shown in 4 is formed. The composite electrode tips 13 are required in the number corresponding to the number of spark discharge gaps of the spark plug 1 used.
【００１７】（４）図５に示すように、先端に外側電極
３が溶接された主体金具６内に組み込んで固定する。こ
の時点では、外側電極３は、まだ直線状であり、火花放
電ギャップを形成していない。( 4 ) As shown in FIG. 5 , the outer electrode 3 is assembled and fixed in a metal shell 6 having an outer electrode 3 welded to its tip. At this point, the outer electrodes 3, Ri still straight der, do not form sparks discharge gap.
【００１８】（５）図６に示すように、複合電極チップ
１３の耐蝕性非貴金属製部材１２側を直状の外側電極３
の火花放電ギャップ側の表面に載せ、抵抗溶接によって
接合する。
（６）複合電極チップ１３が接合された外側電極３を治
具によって内方に曲折させて、図１に示すように、中心
電極２との間で、火花放電ギャップを形成する。( 5 ) As shown in FIG. 6 , the side of the composite electrode tip 13 facing the corrosion-resistant non-precious metal member 12 is a straight outer electrode 3.
It is placed on the surface of the spark discharge gap side of and is joined by resistance welding. ( 6 ) The outer electrode 3 to which the composite electrode tip 13 is joined is bent inward by a jig to form a spark discharge gap with the center electrode 2 as shown in FIG.
【図１】本発明の実施例を示すスパークプラグの部分側
面図である。FIG. 1 is a partial side view of a spark plug showing an embodiment of the present invention.
【図２】本発明のスパークプラグの製造方法におけるチ
ップ状耐火花消耗電極材と円柱状の耐蝕性非貴金属製部
材との接合方法を示す部分斜視図である。FIG. 2 is a partial perspective view showing a method for joining the chip-shaped spark-resistant consumable electrode material and the cylindrical corrosion-resistant non-precious metal member in the spark plug manufacturing method of the present invention.
【図３】本発明のスパークプラグの製造方法における円
柱状の耐蝕性非貴金属製部材の切断を示す側面図であ
る。FIG. 3 is a side view showing cutting of a columnar corrosion-resistant non-precious metal member in the method for manufacturing a spark plug of the present invention.
【図４】本発明の実施例を示す複合電極チップの斜視図
である。FIG. 4 is a perspective view of a composite electrode chip showing an embodiment of the present invention.
【図５】本発明のスパークプラグの製造方法における絶
縁体と主体金具との組み付け方法を示す側面図である。FIG. 5 is a side view showing a method of assembling the insulator and the metal shell in the spark plug manufacturing method of the present invention.
【図６】本発明のスパークプラグの製造方法における外
側電極と複合電極チップとの接合方法を示す側面図であ
る。FIG. 6 is a side view showing a method of joining the outer electrode and the composite electrode tip in the method for manufacturing the spark plug of the present invention.
１ スパークプラグ
２ 中心電極
３ 外側電極
１１ チップ状耐火花消耗電極材（チップ状の耐火花消
耗電極材）
１２ 耐蝕性非貴金属製部材（棒状の耐蝕性非貴金属製
部材）
１３ 複合電極チップ
２１ 耐火花消耗電極材
２２ 耐蝕性非貴金属製部材
３１ 耐火花消耗電極材
３２ 耐蝕性非貴金属製部材1 Spark Plug 2 Center Electrode 3 Outer Electrode 11 Chip-shaped Spark Consumable Electrode Material (Chip-shaped Spark Consumable Electrode Material) 12 Corrosion-Resistant Non-Precious Metal Member (Rod-shaped Corrosion-Resistant Non-Precious Metal Member) 13 Composite Electrode Tip 21 Fire-Resistant Flower consumable electrode material 22 Corrosion resistant non-precious metal member 31 Spark resistant consumable electrode material 32 Corrosion resistant non-precious metal member
フロントページの続き (56)参考文献 特開 昭59−98489（ＪＰ，Ａ) 特開 昭57−154780（ＪＰ，Ａ) 特開 昭57−55083（ＪＰ，Ａ) 特開 昭59−40482（ＪＰ，Ａ) 特開 平４−329286（ＪＰ，Ａ) 特開 平７−37676（ＪＰ，Ａ) 特開 平２−49388（ＪＰ，Ａ) 特開 昭62−268080（ＪＰ，Ａ) 特開 平４−104491（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01T 13/00 - 21/06 Continuation of the front page (56) Reference JP-A-59-98489 (JP, A) JP-A-57-154780 (JP, A) JP-A-57-55083 (JP, A) JP-A-59-40482 (JP , A) JP 4-329286 (JP, A) JP 7-37676 (JP, A) JP 2-49388 (JP, A) JP 62-268080 (JP, A) JP 4-104491 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) H01T 13 / 00-21 / 06
Claims (4)
花消耗電極材を設けたスパークプラグの製造方法におい
て、 棒状の耐蝕性非貴金属製部材の先端に、チップ状の耐火
花消耗電極材をＴＩＧ溶接或いはレーザ溶接の溶融接合
法により接合する第１工程と、 該第１工程により得られた複合電極材の前記耐蝕性非貴
金属製部材を適当寸法にカットする第２工程と、 該第２工程により得られた複合電極チップの前記耐蝕性
非貴金属製部材側を、Ｎｉ合金或いはＮｉ合金外皮とＣ
ｕ若しくはＣｕ合金芯部の複合金属からなる外側電極の
火花放電間隙側に溶接する第３工程とを含んだことを特
徴とするスパークプラグの製造方法。1. A method for manufacturing a spark plug in which a spark-resistant consumable electrode material is provided on at least a tip side surface of an outer electrode, wherein a chip-shaped spark-resistant consumable electrode material is TIG at a tip of a rod-shaped non-corrosive non-precious metal member. Fusion welding or laser welding
Step of joining by a method, a second step of cutting the corrosion-resistant non-precious metal member of the composite electrode material obtained by the first step to an appropriate size, and a composite electrode chip obtained by the second step Of the corrosion-resistant non-precious metal member side of the Ni alloy or Ni alloy skin and C
and a third step of welding to the spark discharge gap side of the outer electrode made of the composite metal of u or Cu alloy core.
火花消耗電極材の径より大きくしたことを特徴とする請
求項１記載のスパークプラグの製造方法。2. A contract wherein the diameter of the corrosion-resistant non-precious metal member is larger than the diameter of the spark-resistant consumable electrode material.
The method for manufacturing a spark plug according to claim 1 .
ップを前記耐蝕性非貴金属製部材に接合することを特徴
とする請求項１または２記載のスパークプラグの製造方
法。3. The spark-resistant consumable electrode material includes any one of a platinum alloy containing 20 wt% or more of Ir, an Ir alloy containing 5 wt% or less of rare earth element oxide, and an alloy of 95 wt% or more of W. A chip made of or is bonded to the corrosion-resistant non-precious metal member.
The method for manufacturing the spark plug according to claim 1 or 2.
Law .
重量％以上のＣｒを含んだＮｉ合金を使用したことを特
徴とする請求項１、２または３のいずれか１項に記載の
スパークプラグの製造方法。4. The corrosion-resistant non-precious metal member is 13
A spark plug manufacturing method according to any one of claims 1, 2 or 3, characterized by using the Ni alloy which contains by weight percent of Cr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10391095A JP3426051B2 (en) | 1995-04-27 | 1995-04-27 | Manufacturing method of spark plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10391095A JP3426051B2 (en) | 1995-04-27 | 1995-04-27 | Manufacturing method of spark plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08298178A JPH08298178A (en) | 1996-11-12 |
| JP3426051B2 true JP3426051B2 (en) | 2003-07-14 |
Family
ID=14366588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10391095A Expired - Fee Related JP3426051B2 (en) | 1995-04-27 | 1995-04-27 | Manufacturing method of spark plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3426051B2 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3121309B2 (en) * | 1998-02-16 | 2000-12-25 | 株式会社デンソー | Spark plugs for internal combustion engines |
| US6337533B1 (en) | 1998-06-05 | 2002-01-08 | Denso Corporation | Spark plug for internal combustion engine and method for manufacturing same |
| US6373172B1 (en) | 1998-12-21 | 2002-04-16 | Denso Corporation | Spark plug for internal combustion engine having a straight pillar ground electrode |
| DE10025048A1 (en) * | 2000-05-23 | 2001-12-06 | Beru Ag | Center electrode with precious metal reinforcement |
| JP4433634B2 (en) | 2000-06-29 | 2010-03-17 | 株式会社デンソー | Spark plug for cogeneration |
| JP4092889B2 (en) * | 2000-07-10 | 2008-05-28 | 株式会社デンソー | Spark plug |
| JP4322458B2 (en) | 2001-02-13 | 2009-09-02 | 株式会社日本自動車部品総合研究所 | Ignition device |
| JP2003317896A (en) | 2002-02-19 | 2003-11-07 | Denso Corp | Spark plug |
| JP4680513B2 (en) * | 2004-01-13 | 2011-05-11 | 日本特殊陶業株式会社 | Spark plug manufacturing method and spark plug |
| JP4603005B2 (en) | 2007-03-28 | 2010-12-22 | 日本特殊陶業株式会社 | Manufacturing method of spark plug |
| WO2009063930A1 (en) | 2007-11-15 | 2009-05-22 | Ngk Spark Plug Co., Ltd. | Spark plug for internal combustion engine |
| EP2278671B1 (en) | 2008-04-23 | 2019-02-27 | NGK Spark Plug Co., Ltd. | Method of manufacturing spark plug |
| CN102017340B (en) | 2008-04-24 | 2013-06-12 | 日本特殊陶业株式会社 | Spark plug |
| JP4705129B2 (en) | 2008-05-21 | 2011-06-22 | 日本特殊陶業株式会社 | Spark plug |
| CN102379072B (en) * | 2009-03-31 | 2014-04-30 | 日本特殊陶业株式会社 | Method of manufacturing sparkplugs |
| JP4964281B2 (en) * | 2009-09-11 | 2012-06-27 | 日本特殊陶業株式会社 | Spark plug |
| JP5545166B2 (en) * | 2010-10-20 | 2014-07-09 | 株式会社デンソー | Spark plug for internal combustion engine |
-
1995
- 1995-04-27 JP JP10391095A patent/JP3426051B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08298178A (en) | 1996-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3426051B2 (en) | Manufacturing method of spark plug | |
| JP3196601B2 (en) | Method of manufacturing spark plug for internal combustion engine | |
| JP4747464B2 (en) | Spark plug and manufacturing method thereof | |
| EP0872928B1 (en) | Spark plug for internal combustion engine | |
| JP4271379B2 (en) | Spark plug | |
| JP3361479B2 (en) | Manufacturing method of spark plug | |
| JP3425973B2 (en) | Spark plug and manufacturing method thereof | |
| US7923909B2 (en) | Ignition device having an electrode with a platinum firing tip and method of construction | |
| JP2002313524A (en) | Spark plug and manufacturing method thereof | |
| JP2003142226A (en) | Spark plug | |
| JP2921524B2 (en) | Spark plug for internal combustion engine | |
| JP4402871B2 (en) | Manufacturing method of spark plug | |
| JP4104459B2 (en) | Manufacturing method of spark plug | |
| JP2853109B2 (en) | Spark plug manufacturing method | |
| JP4316060B2 (en) | Spark plug manufacturing method and spark plug | |
| JPH11354251A (en) | Spark plug | |
| JP4070230B2 (en) | Spark plug and method of manufacturing spark plug | |
| JP2006173141A (en) | Spark plug | |
| JP4017416B2 (en) | Manufacturing method of spark plug | |
| JP4414849B2 (en) | Spark plug manufacturing method and spark plug | |
| JPH0750626B2 (en) | Electrode for spark plug | |
| JP3364746B2 (en) | Spark plug manufacturing method and spark plug | |
| JP2023149682A (en) | Spark plug | |
| JP3769766B2 (en) | Manufacturing method of spark plug | |
| JP2853110B2 (en) | Spark plug manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080509 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090509 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090509 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090509 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100509 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100509 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110509 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120509 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120509 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130509 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130509 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |