JPH02121289A - Manufacture and welding of outside electrode of spark plug, with good heat-conduction metal wrapped therein - Google Patents
Manufacture and welding of outside electrode of spark plug, with good heat-conduction metal wrapped thereinInfo
- Publication number
- JPH02121289A JPH02121289A JP27479688A JP27479688A JPH02121289A JP H02121289 A JPH02121289 A JP H02121289A JP 27479688 A JP27479688 A JP 27479688A JP 27479688 A JP27479688 A JP 27479688A JP H02121289 A JPH02121289 A JP H02121289A
- Authority
- JP
- Japan
- Prior art keywords
- outer electrode
- electrode base
- welding
- spark plug
- nickel alloy
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 28
- 239000002184 metal Substances 0.000 title claims abstract description 28
- 238000003466 welding Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000000137 annealing Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000011162 core material Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 238000005242 forging Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229910001316 Ag alloy Inorganic materials 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Forging (AREA)
- Spark Plugs (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野］
本発明は、銅、銀、銅合金、または銀合金などの良熱伝
導金属よりなる芯材が包み込まれたスパークプラグの外
側電極製造方法および溶接方法に関する。Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a method for manufacturing an outer electrode of a spark plug in which a core material made of a metal with good thermal conductivity such as copper, silver, a copper alloy, or a silver alloy is wrapped. Regarding welding methods.
［従来の技術］
電極の耐熱性の向上またはスパークプラグのワイドギャ
ップ化により、外周部に耐熱ニッケル合金を用い、芯部
に熱伝導性が良好な銅あるいは銀を挟入したクラッド構
造が中心電極には以前から採用されていた。[Conventional technology] Due to improvements in the heat resistance of electrodes or the widening of spark plug gaps, the center electrode has a clad structure in which a heat-resistant nickel alloy is used for the outer periphery and copper or silver with good thermal conductivity is sandwiched in the core. had previously been adopted.
近年エンジンの高出力化および着火性の向上により中心
電極突出しタイプのスパークプラグが採用されるにいた
り、クラッド構造の外側電極の製造法の実用化が検討さ
れてきた。In recent years, spark plugs with protruding center electrodes have been adopted due to higher engine output and improved ignitability, and the practical application of methods for manufacturing outer electrodes with a clad structure has been studied.
従来の銅、銀、銅合金または銀合金などの良熱伝導金属
よりなる芯材を包み込んだスパークプラグの外側電極製
造方法としては、第６図に示す如く、芯材である平角形
状のタララドワイヤ１００を挟持した外周部の耐熱ニッ
ケル合金２００の切断したニッケル合金２００の先端２
１０に腐食保護を図るために前記ニッケル合金２００と
同材質のニッケル合金３００を溶接している（米国特許
第２．２９６，０３３号）。As shown in FIG. 6, a conventional method for manufacturing an outer electrode of a spark plug enclosing a core material made of a metal with good thermal conductivity such as copper, silver, copper alloy, or silver alloy is as follows: As shown in FIG. The tip 2 of the cut nickel alloy 200 of the heat-resistant nickel alloy 200 on the outer periphery sandwiching the
A nickel alloy 300 made of the same material as the nickel alloy 200 is welded to the nickel alloy 10 for corrosion protection (US Pat. No. 2,296,033).
［発明が解決しようとする課題］
しかるに、このような良熱伝導金属が包み込まれたスパ
ークプラグの外側電極製造方法では接合面から腐食が進
行しやすく耐久性に劣る欠点がある。[Problems to be Solved by the Invention] However, this method of manufacturing the outer electrode of a spark plug in which a metal with good thermal conductivity is wrapped has the disadvantage that corrosion tends to progress from the joint surface and the durability is poor.
本発明の目的は、主体合鴨との溶接強度に優れる良熱伝
導金属が包み込まれたスパークプラグの外側電極製造方
法および溶接方法の提供にある。An object of the present invention is to provide a method for manufacturing and a welding method for the outer electrode of a spark plug in which a metal with good thermal conductivity that has excellent welding strength with the main body is wrapped.
［課題を解決するための手段］
」−記［１的を達成するため、本発明は、次の構成を採
用した。[Means for Solving the Problems] In order to achieve the first objective, the present invention employs the following configuration.
■耐熱ニッケル合金でカップ成形体を成形する工程、銅
、銀、またはこれらの合金などの良熱伝導金属よりなる
芯材を嵌入し嵌合体にする［程、前記嵌合体に拡散熱処
理を施して界面の接合を行い接合体をｇ！Ａ造する工程
、ダイス穴断面が円形のダイスを通して前記接合体の冷
間押出しを行い、接合体を押出成形体にする−［１１７
、出口側のダイス穴断面が矩形のダイスに前記押出成形
体を通し平角形状体に成形する工程、該平角形状体に焼
鈍を施し、外＠電４ｆｉ基体にする工程、耐熱ニッケル
合金に囲まれた芯材の断面積が端部に向かつ“Ｃ小さく
なるように外側電極基体の後端を切断する工程、この成
形済外側電極基体をスパークプラグの主体金具に溶接す
る工程。■The process of forming a cup molded body from a heat-resistant nickel alloy, by inserting a core material made of a metal with good heat conductivity such as copper, silver, or an alloy of these to form a fitted body. The interface is bonded and the bonded body is g! A manufacturing process, cold extrusion of the bonded body through a die with a circular cross section of the die hole to make the bonded body into an extrusion molded body-[117
, a process of passing the extruded body through a die with a rectangular die hole cross section on the exit side and forming it into a rectangular body; a step of annealing the rectangular body to make it into an outer@electronic4fi base; A process of cutting the rear end of the outer electrode base so that the cross-sectional area of the core material becomes smaller toward the end, and a process of welding this formed outer electrode base to the metal shell of the spark plug.
■あらかじめ、スパークプラグの主体金具に前記カップ
成形体と同様の耐熱ニッケル合金が溶接された後、前記
成形済外側電極基体が溶接される請求項１記載の良熱伝
導金属が包み込まれたスパークプラグの外側電極製造方
法および溶接方法。(2) A spark plug wrapped in a good heat conductive metal according to claim 1, wherein a heat-resistant nickel alloy similar to the cup molded body is welded to the main metal fitting of the spark plug in advance, and then the formed outer electrode base is welded. outer electrode manufacturing method and welding method.
し作用および発明の効果コ
本発明のスパークプラグの外側電極製造方法および溶接
方法は、次の作用および効果を生じる。Functions and Effects of the Invention The method for manufacturing and welding the outer electrode of a spark plug according to the present invention produces the following functions and effects.
く請求項１について〉
外側電極基体をスパークプラグの外側電極に溶接する際
に、耐熱ニッケル合金に囲まれた芯材の断面積が端部に
向かって小さくなるように外側電極基体の後端を切断し
ている。このため、成形済外側電極基体の後端は芯材が
ほとんど露出せず、主体金具（低炭素鋼）は、はぼ耐熱
ニッケル合金と溶接されることになる。よって溶接面に
芯材が介在する場合と比べ接合強度はかなり向上する。Regarding Claim 1> When welding the outer electrode base to the outer electrode of the spark plug, the rear end of the outer electrode base is welded so that the cross-sectional area of the core surrounded by the heat-resistant nickel alloy decreases toward the end. It is disconnected. Therefore, the core material is hardly exposed at the rear end of the formed outer electrode base, and the main metal fitting (low carbon steel) is welded to the heat-resistant nickel alloy. Therefore, the joint strength is considerably improved compared to the case where a core material is interposed on the welding surface.
また、溶接後、芯材が外側電極の外部に全く露出しない
ので外側電極の腐食が起き難い。Furthermore, since the core material is not exposed to the outside of the outer electrode at all after welding, corrosion of the outer electrode is less likely to occur.
〈請求項２について〉
あらかじめ、スパークプラグの外側電極にカップ成形体
と同様の耐熱ニッケル合金が溶接された後、この耐熱ニ
ッケル合金に成形済外側電極基体が溶接される。このた
め、同種材質どうしの溶接となるので著しく溶接強度が
向上する。<Regarding Claim 2> After a heat-resistant nickel alloy similar to the cup molded body is welded to the outer electrode of the spark plug in advance, a formed outer electrode base body is welded to this heat-resistant nickel alloy. Therefore, the welding strength is significantly improved since the same materials are welded together.
［実施例］
つぎに本発明の第１実施例（請求項１に対応）を第１図
ないし第３図とともに説明する。[Embodiment] Next, a first embodiment of the present invention (corresponding to claim 1) will be described with reference to FIGS. 1 to 3.
スパークプラグの外側電極は、カップ成形体ｌに芯材２
を嵌入して嵌合体３とされ、該嵌合体３に拡散熱処理を
施し接合体４に製）ｈされ、つぎに、鍛造ダイス５．６
を通して押出成形体７．ｖ角形状体８とされ、焼鈍を施
し、外側電極基体９にし、さらに、耐熱ニッケル合金に
囲まれた芯材２の断面積が端部に向かって小さくなるよ
うに外側電極基体９の後端を切断し、成形済外ｌｌｌ電
極基体９ａに製造され、スパークプラグの主体金具９０
に電気゛抵抗溶接される。The outer electrode of the spark plug is made of a cup molded body l with a core material 2.
is fitted to form a fitted body 3, the fitted body 3 is subjected to diffusion heat treatment to produce a joined body 4), and then a forging die 5.6 is formed.
7. The rear end of the outer electrode base 9 is formed into a v-shaped body 8 and annealed to form an outer electrode base 9, and the cross-sectional area of the core 2 surrounded by the heat-resistant nickel alloy decreases toward the end. is cut into a molded outer electrode base 9a, and the metal shell 90 of the spark plug is manufactured.
electrically resistance welded.
カップ成形体１は、主成分のニッケルに、クロム、鉄、
珪素、アルミニウムなどを添加した耐熱ニッケル合金で
形成されている。また、カップ成形体１は、外径ドがφ
４．５〜φ５．０、内径Ｅがφ３．０−φ３．３、寸法
１が外側電極長に比例されている。このカップ成形体１
は先端部において、内壁は中央側に向かって窪む傾斜面
１１が形成され、外壁は先端方向に突出ている。また、
後端部の端面は内側に向かって傾斜したテーパ面１２と
なっている。この成形はプレス（図示せず）で行ってい
る。The cup molded body 1 is made of nickel as a main component, chromium, iron,
It is made of a heat-resistant nickel alloy containing silicon, aluminum, etc. Moreover, the cup molded body 1 has an outer diameter of φ
4.5 to φ5.0, the inner diameter E is φ3.0 to φ3.3, and the dimension 1 is proportional to the outer electrode length. This cup molded body 1
At the distal end, the inner wall is formed with an inclined surface 11 concave toward the center, and the outer wall projects toward the distal end. Also,
The end surface of the rear end portion is a tapered surface 12 that slopes inward. This molding is performed using a press (not shown).
芯材２は、熱伝導が良い、銅、銀、銅合金または銀合金
などで形成されている。この芯材２は、嵌入の際、先端
テーバ向２１が前記傾斜面１１に当接し、後端テーパ面
２２が前記テーバ向１２に当接する。The core material 2 is made of copper, silver, copper alloy, silver alloy, or the like, which has good thermal conductivity. When this core material 2 is inserted, the tip tapered surface 21 comes into contact with the inclined surface 11, and the rear end tapered surface 22 comes into contact with the tapered direction 12.
嵌合体３は、略砲弾形状を呈している。この嵌合体３は
約２トンの力が加えられてカップ成形体１に嵌入される
。The fitted body 3 has a substantially bullet shape. This fitted body 3 is fitted into the cup molded body 1 with a force of about 2 tons applied thereto.
接合体４は、嵌合体３に大気雰囲気中で約９００℃、１
時間の拡散熱処理を施したものである。The joined body 4 is heated to the fitted body 3 at about 900° C. for 1
It has been subjected to time diffusion heat treatment.
鍛造ダイス５は、接合体４が通るコンテナ５１と、整形
を行うダイス５２と、接合体４を前方に押出すラム５３
とからなる。接合体４がラム５３により前方に押され、
整形部の断面がφｄのダイス５２内を通過することによ
り径が絞られ、軸方向の長さが延長される。ここで、種
々実験の結果φｄは、２１丁丁７１以上、Ｂｆｆｉ倉ロ
ア７以下が適当である。また、Ａ＝Ｂは外側電極基体８
の各断面の縦、横の長さである。The forging die 5 includes a container 51 through which the joined body 4 passes, a die 52 that performs shaping, and a ram 53 that pushes the joined body 4 forward.
It consists of The joined body 4 is pushed forward by the ram 53,
By passing through the die 52 with a cross section of φd, the diameter is narrowed and the length in the axial direction is extended. Here, as a result of various experiments, it is appropriate that φd is 21 to 71 or more and Bffi warehouse lower to 7 or less. In addition, A=B is the outer electrode base 8
These are the vertical and horizontal lengths of each cross section.
鍛造ダイス６は、入口の耐圧容器部６１の断面がφｄで
あり、整形部のダイス６２は外■電極基体８のＡ、Ｂに
対応した矩形断面を呈している。In the forging die 6, the pressure container portion 61 at the inlet has a cross section of φd, and the die 62 at the shaping portion has a rectangular cross section corresponding to A and B of the outer electrode base 8.
押出成形体７は、φｄの略円柱体であり、後端面および
後端側外表面には前記芯材２が露出している。The extrusion molded body 7 is a substantially cylindrical body with a diameter of φd, and the core material 2 is exposed on the rear end surface and the outer surface on the rear end side.
平角形状体８は、矩形の平角形状を呈し、断面の長さは
Ａ、Ｂである。また、後端面および後端側外表面には前
記芯材２が露出している。The rectangular body 8 has a rectangular flat shape, and the lengths of the cross section are A and B. Further, the core material 2 is exposed on the rear end surface and the outer surface on the rear end side.
外側電極基体９は、平角形状体８の先端を矩形にし、焼
鈍を施したものである。The outer electrode base 9 is made by making the tip of the rectangular body 8 rectangular and annealing it.
成形済外側電極基体９ａは、芯材２が耐熱ニッケル合金
に囲まれた芯材２の断面積が端部に向かって小さくなる
ように外側電極基体９の後端をニッパ等の刃９２．９２
で切断したものである。The rear end of the formed outer electrode base 9a is cut with a blade 92.92 of a nipper or the like so that the cross-sectional area of the core 2 surrounded by the heat-resistant nickel alloy decreases toward the end.
It was cut by.
スパークプラグの外側電極は、つぎの工程により製造さ
れる。The outer electrode of the spark plug is manufactured by the following steps.
（あ）前記耐熱ニッケル合金でカップ成形体１を形成す
る。(A) A cup molded body 1 is formed from the heat-resistant nickel alloy.
（い）前記芯材２を前記カップ成形体１に前記加圧を加
えて嵌入し、嵌合体３にする。(b) The core material 2 is fitted into the cup molded body 1 by applying the pressure described above to form a fitted body 3.
くう）該嵌合体３に前記拡散熱処理を施して芯材２の外
周面２３とカップ成形体１の内周面１３と接合を行い接
合体４を製造する。C) The fitted body 3 is subjected to the diffusion heat treatment to bond the outer circumferential surface 23 of the core material 2 and the inner circumferential surface 13 of the cup molded body 1 to produce a bonded body 4.
くえ）ダイス穴断面が円形の鍛造ダイス５を通して前記
接合体の冷間押出しを行い、接合体４を押出成形体７に
する。(4) The joined body is cold extruded through a forging die 5 whose die hole has a circular cross section, and the joined body 4 is made into an extruded body 7.
（お）出口側のダイス穴断面が矩形の鍛造ダイス６を通
し平角形状体８を成形する。(E) A rectangular body 8 is formed through a forging die 6 whose die hole on the exit side has a rectangular cross section.
（か）この、平角形状体８の先端を矩形とし、焼鈍を施
し、外側電極基体９にする。(f) The tip of this rectangular body 8 is made rectangular and annealed to form an outer electrode base 9.
（き）耐熱ニッケル合金に囲まれた芯材２の断面積が端
部に向かって小さくなるように外側電極基体９の後端を
ニッパ等の刃９２．９２で切断する。(i) Cut the rear end of the outer electrode base 9 with blades 92, 92 of a nipper or the like so that the cross-sectional area of the core material 2 surrounded by the heat-resistant nickel alloy becomes smaller toward the end.
（＜）この成形済外側電極基体９ａをスパークプラグの
主体金具９０に溶接する。(<) This formed outer electrode base 9a is welded to the metal shell 90 of the spark plug.
つぎに、第１実施例の手法でスパークプラグの外側電極
を製造する際の作用および効果を説明する。Next, the operation and effect when manufacturing the outer electrode of a spark plug using the method of the first embodiment will be explained.
外側電極基体９をスパークプラグの主体金具９０に溶接
する際に、耐熱ニッケル合金に囲まれた芯材２の断面積
が端部に向かって小さくなるように外側電極基体９の後
端をニッパ等の刃９２．９２で切断されている。このた
め、成形済外側電極基体９ａの後端は芯材２がほとんど
露出せず、主体金具９０（低炭素鋼）は、はぼ耐熱ニッ
ケル合金と溶接されることになる。ここで、第３図に示
すように、前記工程（き）を行わない場合の溶接面に芯
材２がかなりの割合で介在する場合と比較し、第２図に
示す本実施例においての、外側電極と主体金具９０との
接合強度はかなり向上ぐる。When welding the outer electrode base 9 to the metal shell 90 of the spark plug, the rear end of the outer electrode base 9 is welded with nippers or the like so that the cross-sectional area of the core material 2 surrounded by the heat-resistant nickel alloy decreases toward the end. It is cut with the blade 92.92. Therefore, the core material 2 is hardly exposed at the rear end of the formed outer electrode base 9a, and the metal shell 90 (low carbon steel) is welded to the heat-resistant nickel alloy. Here, as shown in FIG. 3, compared to the case where a considerable proportion of the core material 2 is present on the welding surface without performing the above step, in this embodiment shown in FIG. The bonding strength between the outer electrode and the metal shell 90 is considerably improved.
具体的な数値として、第３図の外側電極のｔｆ４遣の場
合、往復折り曲げ試験を行うと、１回未満でとれた。As a concrete numerical value, in the case of TF4 of the outer electrode shown in FIG. 3, when a reciprocating bending test was performed, the bending could be done in less than one time.
第２図の構造の場合は１回−３回の耐久性が生じた。ま
た、溶接後、芯材２が主体金具９０の外部に全く露出し
ないので外側電極の腐食が起き難い。In the case of the structure shown in FIG. 2, the durability was 1 to 3 times. Furthermore, since the core material 2 is not exposed to the outside of the metal shell 90 at all after welding, corrosion of the outer electrode is less likely to occur.
つぎに本発明の第２実施例（請求項２に対応）の、良熱
伝導金属が包み込まれたスパークプラグの外側電極製造
−［程を第４図および第５図とともに説明する。Next, the process of manufacturing the outer electrode of a spark plug in which a metal with good thermal conductivity is wrapped, according to a second embodiment (corresponding to claim 2) of the present invention, will be explained with reference to FIGS. 4 and 5.
スパークプラグの外側電極は、あらかじめ、スパークプ
ラグの主体金具９０に前記カップ成形体ｌと同様の耐熱
ニッケル合金９１を溶接した後、前記成形済外側電極基
体９ａをこの耐熱ニッケル合金９１に溶接している。The outer electrode of the spark plug is made by first welding a heat-resistant nickel alloy 91 similar to the cup molded body 1 to the metal shell 90 of the spark plug, and then welding the formed outer electrode base 9a to this heat-resistant nickel alloy 91. There is.
つぎに、第２実施例の方法でスパークプラグの外側１！
極を’Ｉ造する際の作用および効果を説明する。Next, use the method of the second embodiment to attach the spark plug to the outside 1!
The functions and effects of forming a pole will be explained.
あらかじめ、スパークプラグの主体ｆＬ具９０にカップ
成形体１と同様の耐熱ニッケル合金９１が溶接された後
、この耐熱ニッケル合金９１に成形済外側電極基体９ａ
か溶接される。このため、耐熱ニッケル合金どうしの溶
接となるので前記往復折り曲げ試験を行うと３回以］・
の強度が得られた。After a heat-resistant nickel alloy 91 similar to the cup molded body 1 is welded to the spark plug main body fL member 90 in advance, a formed outer electrode base 9a is attached to this heat-resistant nickel alloy 91.
or welded. For this reason, since the heat-resistant nickel alloys are welded together, the above-mentioned reciprocating bending test is performed more than 3 times].
strength was obtained.
第５図に示すような中心電極に銅が包み込まれたスパー
クプラグで、外側電極にも銅を包み込むことにより外側
電極の先端部の温度を１００℃・〜１５０℃低十させる
ことかて′きた。In a spark plug with copper wrapped around the center electrode as shown in Figure 5, it has been possible to lower the temperature at the tip of the outer electrode by 100°C to 150°C by wrapping copper around the outer electrode as well. .
また、主体金具９０の先端と中心電極の先端との軸線距
ｆｉｍが４ｍｔｎを越えるプラグにおいて、通常の外側
電極で、９５０℃を越えるエンジンを使用した場合（耐
熱ニッケル合金の酸化膨脂を生じる場合）、特に有効で
ある。In addition, in a plug where the axial distance fim between the tip of the metal shell 90 and the tip of the center electrode exceeds 4 mtn, if an engine with a temperature exceeding 950°C is used with a normal outer electrode (if oxidation swelling of the heat-resistant nickel alloy occurs) ), are particularly effective.
本発明は上記実施例以外に次の実施態様を含む。The present invention includes the following embodiments in addition to the above embodiments.
ａ、第１実施例の手法でスパークプラグの外＋１ｔｌｌ
電極を製造する際、圧力を加えずに芯材２をカップ成形
体１に嵌入し°Ｃも良い。a. Outside the spark plug +1tll using the method of the first embodiment
When manufacturing an electrode, it is also possible to fit the core material 2 into the cup molded body 1 without applying pressure at a temperature of °C.
ｂ、第１実施例では、耐熱ニッケル合金のカップ成形体
１の開口端より芯材２が突出した嵌合体３であったが、
これをカップ成形体１の開口４１より突出しないように
した嵌合体であっても良く、この場合、外側電極基体９
の後端の切断工程は軒く、両側より先薄に圧潰するだけ
で良い。b. In the first embodiment, the fitted body 3 was such that the core material 2 protruded from the open end of the cup molded body 1 made of heat-resistant nickel alloy.
This may be a fitted body that does not protrude from the opening 41 of the cup molded body 1; in this case, the outer electrode base 9
The cutting process for the rear end is just a matter of flattening it and crushing it thinly from both sides.
第１図および第２図は良熱伝導金属が包み込まれたスパ
ークプラグの外［１１電極製造方法の第１実施例を示す
製造工程図、第３図は、製造工程（き）を行わない場合
であり、第１実施例の効果を説明するための溶接の様子
を示す断面図、第４図は良熱伝導金属が包み込まれたス
パークプラグの外側電極製造方法で！ｊ！ｉ！造した外
側電極を主体金具に溶接した状態を示す断面図、第５図
は第２実施例の効果を説明するための外側電極が溶接さ
れたスパークプラグの部分断面図、第６図は従来の製造
方法で製造された外側電極の断面図である。Figures 1 and 2 are manufacturing process diagrams showing the first embodiment of the electrode manufacturing method for the outside of a spark plug in which a metal with good thermal conductivity is wrapped. Figure 3 is a diagram showing the case where the manufacturing process is not performed Figure 4 is a cross-sectional view showing the welding process to explain the effects of the first embodiment, and is a method for manufacturing the outer electrode of a spark plug wrapped in a metal with good thermal conductivity! j! i! FIG. 5 is a partial cross-sectional view of a spark plug to which the outer electrode is welded to explain the effect of the second embodiment, and FIG. FIG. 3 is a cross-sectional view of an outer electrode manufactured by the manufacturing method.
Claims (1)
たスパークプラグの外側電極製造方法および溶接方法。 （ア）耐熱ニッケル合金でカップ成形体を成形する工程
。 （イ）銅、銀、またはこれらの合金などの良熱伝導金属
よりなる芯材を嵌入し嵌合体にする工程。 （ウ）前記嵌合体に拡散熱処理を施して界面の接合を行
い接合体を製造する工程。 （エ）ダイス穴断面が円形のダイスを通して前記接合体
の冷間押出しを行い、接合体を押出成形体にする工程。 （オ）出口側のダイス穴断面が矩形のダイスに前記押出
成形体を通し平角形状体に成形する工程。 （カ）該平角形状体に焼鈍を施し、外側電極基体にする
工程。 （キ）耐熱ニッケル合金に囲まれた芯材の断面積が端部
に向かって小さくなるように外側電極基体の後端を切断
する工程。 （ク）この成形済外側電極基体をスパークプラグの主体
金具に溶接する工程。 ２）あらかじめ、スパークプラグの主体金具に前記カッ
プ成形体と同様の耐熱ニッケル合金が溶接された後、前
記成形済外側電極基体が溶接される請求項１記載の良熱
伝導金属が包み込まれたスパークプラグの外側電極製造
方法および溶接方法。[Claims] 1) A method for manufacturing and welding an outer electrode of a spark plug wrapped in a metal with good thermal conductivity, which comprises the following steps. (a) Process of forming a cup molded body from a heat-resistant nickel alloy. (a) A process in which a core material made of a metal with good thermal conductivity such as copper, silver, or an alloy thereof is inserted to form a fitted body. (c) A step of manufacturing a joined body by subjecting the fitted body to diffusion heat treatment to bond the interface. (d) A step of cold extruding the joined body through a die having a circular die hole cross section to form the joined body into an extrusion molded body. (E) A step of passing the extrusion molded product through a die having a rectangular die hole cross section on the exit side and forming it into a rectangular shape. (F) A step of annealing the rectangular body to form an outer electrode base. (g) A step of cutting the rear end of the outer electrode base so that the cross-sectional area of the core material surrounded by the heat-resistant nickel alloy decreases toward the end. (h) The process of welding this formed outer electrode base to the main metal fitting of the spark plug. 2) The spark wrapped in a good heat conductive metal according to claim 1, wherein a heat-resistant nickel alloy similar to the cup molded body is welded to the main metal fitting of the spark plug in advance, and then the molded outer electrode base is welded. A method for manufacturing and welding the outer electrode of a plug.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27479688A JPH02121289A (en) | 1988-10-31 | 1988-10-31 | Manufacture and welding of outside electrode of spark plug, with good heat-conduction metal wrapped therein |
| BR8905877A BR8905877A (en) | 1988-10-31 | 1989-10-30 | METHOD OF MANUFACTURING AND WELDING OF THE SIDE ELECTRODE OF THE IGNITION CANDLE WITH A BUILT-IN METAL WITH GOOD THERMAL CONDUCTIVITY |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27479688A JPH02121289A (en) | 1988-10-31 | 1988-10-31 | Manufacture and welding of outside electrode of spark plug, with good heat-conduction metal wrapped therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02121289A true JPH02121289A (en) | 1990-05-09 |
Family
ID=17546686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27479688A Pending JPH02121289A (en) | 1988-10-31 | 1988-10-31 | Manufacture and welding of outside electrode of spark plug, with good heat-conduction metal wrapped therein |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH02121289A (en) |
| BR (1) | BR8905877A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010053099A1 (en) * | 2008-11-04 | 2010-05-14 | 日本特殊陶業株式会社 | Spark plug and method for manufacturing the same |
| WO2011142106A1 (en) * | 2010-05-13 | 2011-11-17 | 日本特殊陶業株式会社 | Spark plug |
| CN104104014A (en) * | 2010-11-04 | 2014-10-15 | 日本特殊陶业株式会社 | Spark plug |
| WO2015111634A1 (en) * | 2014-01-23 | 2015-07-30 | 日本特殊陶業株式会社 | Spark plug |
| CN107470532A (en) * | 2017-08-11 | 2017-12-15 | 徐州东力锻压机械有限公司 | A kind of hydraulic press cylinder cylinder body forging technology |
-
1988
- 1988-10-31 JP JP27479688A patent/JPH02121289A/en active Pending
-
1989
- 1989-10-30 BR BR8905877A patent/BR8905877A/en not_active IP Right Cessation
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5099858B2 (en) * | 2008-11-04 | 2012-12-19 | 日本特殊陶業株式会社 | Spark plug and method of manufacturing spark plug |
| WO2010053099A1 (en) * | 2008-11-04 | 2010-05-14 | 日本特殊陶業株式会社 | Spark plug and method for manufacturing the same |
| US8207657B2 (en) | 2008-11-04 | 2012-06-26 | Ngk Spark Plug Co., Ltd. | Spark plug and method of manufacturing the same |
| KR101397895B1 (en) * | 2010-05-13 | 2014-05-20 | 니혼도꾸슈도교 가부시키가이샤 | Spark plug |
| CN102893470A (en) * | 2010-05-13 | 2013-01-23 | 日本特殊陶业株式会社 | Spark plug |
| JP5144818B2 (en) * | 2010-05-13 | 2013-02-13 | 日本特殊陶業株式会社 | Spark plug |
| WO2011142106A1 (en) * | 2010-05-13 | 2011-11-17 | 日本特殊陶業株式会社 | Spark plug |
| US9252568B2 (en) | 2010-05-13 | 2016-02-02 | Ngk Spark Plug Co., Ltd. | Spark plug having ground electrode welded to metal shell |
| CN104104014A (en) * | 2010-11-04 | 2014-10-15 | 日本特殊陶业株式会社 | Spark plug |
| WO2015111634A1 (en) * | 2014-01-23 | 2015-07-30 | 日本特殊陶業株式会社 | Spark plug |
| JP6033442B2 (en) * | 2014-01-23 | 2016-11-30 | 日本特殊陶業株式会社 | Spark plug |
| CN106415956A (en) * | 2014-01-23 | 2017-02-15 | 日本特殊陶业株式会社 | Spark plug |
| CN107470532A (en) * | 2017-08-11 | 2017-12-15 | 徐州东力锻压机械有限公司 | A kind of hydraulic press cylinder cylinder body forging technology |
Also Published As
| Publication number | Publication date |
|---|---|
| BR8905877A (en) | 1990-06-12 |
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