JPS6262257B2 - - Google Patents
Info
- Publication number
- JPS6262257B2 JPS6262257B2 JP648482A JP648482A JPS6262257B2 JP S6262257 B2 JPS6262257 B2 JP S6262257B2 JP 648482 A JP648482 A JP 648482A JP 648482 A JP648482 A JP 648482A JP S6262257 B2 JPS6262257 B2 JP S6262257B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- based alloy
- tip
- fitted
- inner tube
- 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
Links
- 229910045601 alloy Inorganic materials 0.000 claims description 47
- 239000000956 alloy Substances 0.000 claims description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229910000531 Co alloy Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 9
- 239000011521 glass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- -1 Hastelloy x Chemical compound 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000856 hastalloy Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 229910001119 inconels 625 Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
【発明の詳細な説明】
本発明は、デイーゼル機関の予熱に用いるため
のシーズグロープラグに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheathed glow plug for use in preheating a diesel engine.
近年、小型デイーゼルエンジンの出力を増大す
るため、ターボチヤージヤー付エンジンが開発さ
れ、これに伴い、燃焼温度が高くなり燃焼室内に
突出しているグロープラグ発熱チユーブ部の受熱
温度も高くなつてきている。したがつて従来主と
して使われてきたFe基合金（例．SUS 310S）で
は、耐酸化性と耐熱間強度に不足が生じ、Ni基
合金（例．ハステロイ×、インコネル625）また
はCo基合金（例．HS−25、HA−188）等耐酸化
性および耐熱間強度が著しく高い合金（以下耐熱
金属という）が必要となつてきている。 In recent years, engines with turbocharging have been developed to increase the output of small diesel engines, and as a result, the combustion temperature has increased, and the heat receiving temperature of the glow plug heat generating tube that protrudes into the combustion chamber has also increased. There is. Therefore, the Fe-based alloys (e.g. SUS 310S) that have traditionally been mainly used lack oxidation resistance and hot strength, and Ni-based alloys (e.g. Hastelloy x, Inconel 625) or Co-based alloys (e.g. There is a growing need for alloys (hereinafter referred to as heat-resistant metals) with extremely high oxidation resistance and hot strength, such as HS-25 and HA-188).
しかし、これらNi基、Co基合金は従来のFe基
合金に比べ、材料単価が著しく増大し、グロープ
ラグのコスト高の要因となつている。 However, these Ni-based and Co-based alloys have significantly higher material unit costs than conventional Fe-based alloys, which is a factor in the high cost of glow plugs.
本発明の目的は、この材料費の上昇を最小限に
するため、Fe基合金とNi基合金またはCo基合金
など耐熱金属の二重構造により、材料の高価な
Ni基合金またはCo基合金など耐熱金属の使用量
を少なくし、耐熱性が高く且つ安価なシーズグロ
ープラグを提供することにある。 The purpose of the present invention is to minimize the increase in material costs by using a dual structure of heat-resistant metals such as Fe-based alloy and Ni-based alloy or Co-based alloy.
The object of the present invention is to reduce the amount of heat-resistant metal such as Ni-based alloy or Co-based alloy used, and to provide a sheathed glow plug that has high heat resistance and is inexpensive.
つぎに本発明を図に示す一実施例に基づき説明
する。 Next, the present invention will be explained based on an embodiment shown in the drawings.
１は外周に機関への取付ねじ１０１が形成され
た筒状取付金具、２は発熱チユーブであり、先端
３１が閉じた金属製シーズチユーブ３と、その中
心に沿つて挿入された金属製棒状中心電極４と、
該中心電極４の先端４１と前記シーズチユーブ３
の先端底３０との間を接線するよう配されたコイ
ル状の発熱線５と、前記中心電極４と発熱線５と
を固定するためシーズチユーブ３内に充填された
電気絶縁性セラミツク粉末６とシーズチユーブ３
の開口がわ端部に挿入されたガラスシール材７と
からなる。この発熱チユーブ２はその先端がわ取
付金具１の先端がわから突出するよう前記取付金
具１内に嵌入され、取付金具１の先端がわ嵌合面
にろう付け８を施して取付金具１に固着されると
ともに取付金具１の後端がわには絶縁リング９が
嵌め込まれさらにナツト１１が螺合されている。
この構成において、シーズチユーブ３は、取付金
具１から突出した先端がわ部がニツケルを主体と
するNi基合金（例．ハステロイ×、インコネル
625）またはコバルトを主体とするCo基合金
（例．HS−25、HA−188）からなり肉厚0.2〜0.4
mmの外層３２と耐熱金属製、鉄を主体とするFe
基合金（例．SUS 310、SUS 304）からなり肉厚
が0.2〜0.4mmの内層３３とからなる。 Reference numeral 1 indicates a cylindrical mounting bracket having a mounting screw 101 formed on the outer periphery for mounting on the engine; 2 indicates a heat generating tube; a metal sheath tube 3 with a closed tip 31; and a metal rod-shaped center inserted along the center of the tube. electrode 4;
The tip 41 of the center electrode 4 and the sheath tube 3
A coiled heating wire 5 is arranged so as to be tangential to the tip bottom 30 of the tube, and electrically insulating ceramic powder 6 is filled in the sheath tube 3 to fix the center electrode 4 and the heating wire 5. Seas tube 3
A glass sealing material 7 is inserted into the end of the opening. This heating tube 2 is fitted into the mounting bracket 1 so that the tip of the mounting bracket 1 protrudes from its tip, and is fixed to the mounting bracket 1 by applying brazing 8 to the fitting surface at the end of the mounting bracket 1. At the same time, an insulating ring 9 is fitted onto the rear end of the mounting bracket 1, and a nut 11 is further screwed therein.
In this configuration, the sheath tube 3 has a tip protruding from the mounting bracket 1 made of a Ni-based alloy mainly made of nickel (e.g. Hastelloy x, Inconel).
625) or a Co-based alloy mainly composed of cobalt (e.g. HS-25, HA-188) with a wall thickness of 0.2 to 0.4
mm outer layer 32 and made of heat-resistant metal, Fe mainly composed of iron
The inner layer 33 is made of a base alloy (eg, SUS 310, SUS 304) and has a wall thickness of 0.2 to 0.4 mm.
本発明のシーズグロープラグの製造工程を第２
図に基づき説明する。 The manufacturing process of the sheathed glow plug of the present invention is carried out in the second step.
This will be explained based on the diagram.
第２図Ａに示す如く一端の先を絞り加工し先端
孔３３１を有するようにしたFe基合金製内がわ
チユーブ３３０（肉厚は0.3〜0.6t）と、同様に
一端の先を絞り加工し先端孔３２１を有するよう
に成形したNi基合金またはCo基合金（肉厚0.3〜
0.6t）とを用い、Fe基合金製内がわチユーブ３３
０の外径とNi基合金またはCo基合金製外がわチ
ユーブ３２０の内径差は0.05〜0.2とした各チユ
ーブ３２０および３３０を嵌合させる。 As shown in Fig. 2A, an inner tube 330 made of Fe-based alloy (thickness is 0.3 to 0.6t) is drawn at one end to have a tip hole 331, and the tip at one end is similarly drawn. Ni-based alloy or Co-based alloy (thickness 0.3~
0.6t) and Fe-based alloy inner tube 33.
The tubes 320 and 330 are fitted so that the difference between the outer diameter of the tube 320 and the inner diameter of the outer tube 320 made of Ni-based alloy or Co-based alloy is 0.05 to 0.2.
一方、中心電極４とコイル状発熱線５、鋲５５
をそれぞれ溶接等で接続した中軸アセンブリ４０
を第２図Ｂに示す如く内がわチユーブ内に挿入し
先端部の鋲５５を前記先端孔３３１および３２１
に嵌め込み、Fe基合金製内がわチユーブ３３０
とNi基合金またはCo基合金製外がわチユーブ３
２０のチユーブ先端を同時に溶接にて一体化す
る。 On the other hand, the center electrode 4, the coiled heating wire 5, and the stud 55
The center shaft assembly 40 is connected by welding, etc.
is inserted into the inner tube as shown in FIG.
Insert into Fe-based alloy inner tube 330
and Ni-based alloy or Co-based alloy outer tube tube 3
The tips of 20 tubes are simultaneously welded together.
その後、Fe基合金製内がわチユーブ３３０内
に電気絶縁性セラミツク粉末６（MgO、SiO2な
ど）を充填し且つ開口がわにはガラスシール材７
を充填し、さらに充填密度を上げるための第２Ｃ
図に示す如くスウエージング加工を施す。 Thereafter, electrically insulating ceramic powder 6 (MgO, SiO2, etc.) is filled into the Fe-based alloy inner tube 330, and a glass sealing material 7 is placed around the opening.
2nd C to further increase the packing density
Perform swaging as shown in the figure.
このスウエージング加工によつて、Fe基合金
製内がわチユーブ３３０とNi基合金またはCo基
合金製外がわチユーブ３２０とは同時に所定の外
径に絞られ、前工程での外径差（0.05〜0.2）を
なくし、完全な密着層を作ることができる。つぎ
に加熱してガラスシール材７を溶融させ開口をシ
ールする。これにより第２図Ｃに示す発熱チユー
ブ２が製造される。さらにこの後工程でシーズチ
ユーブは取付金具１と銀ろう付けされるためFe
基合金製内がわチユーブとNi基またはCo基合金
製外がわチユーブとの境は銀ろう８で固着され
る。このシーズチユーブ３は、熱的条件の厳しい
部分の表面層がNi基合金またはCo基合金とな
り、その延長部（シーズチユーブの組込みに必要
な部分）はFe基合金となり、高価なNi基、Co基
合金の使用量は最小限にすることができチユーブ
材のコストはFe→Ni基に変更の場合４〜７倍に
対し、Fe基→Fe＋Ni基の二重構造の場合1.3〜２
倍程度となり、Fe→Co基に変更の場合10倍以上
に対し、Fe基→Fe＋Co基の二重構造の場合2.6倍
程度となる。 By this swaging process, the inner tube 330 made of Fe-based alloy and the outer tube 320 made of Ni-based alloy or Co-based alloy are simultaneously reduced to a predetermined outer diameter, and the outer diameter difference in the previous process is 0.05 to 0.2) and create a complete adhesion layer. Next, heating is performed to melt the glass sealing material 7 and seal the opening. As a result, the heat generating tube 2 shown in FIG. 2C is manufactured. Furthermore, in the subsequent process, the sheath tube is silver-brazed to the mounting bracket 1, so Fe
The boundary between the base alloy inner tube and the Ni or Co base alloy outer tube is fixed with silver solder 8. The surface layer of this sheath tube 3 is made of a Ni-based alloy or a Co-based alloy in a part that is subject to severe thermal conditions, and its extension part (the part necessary for assembling the sheath tube) is made of an Fe-based alloy, which is an expensive Ni-based or Co-based alloy. The amount of base alloy used can be minimized, and the cost of the tube material is 4 to 7 times when changing from Fe to Ni base, but 1.3 to 2 times when changing from Fe base to Fe + Ni base.
It will be about twice as much, and in the case of changing from Fe to Co group, it will be more than 10 times, but in the case of a double structure of Fe group to Fe + Co group, it will be about 2.6 times.
以上の如く本発明のシーズグロープラグは、発
熱チユーブのシーズチユーブを、取付金具から突
出している部分がニツケル基合金またはコバルト
基合金など耐熱金属製外層と、鉄基合金製内層と
で形成しているので、材料の高価なNi基合金ま
たはCo基合金など耐熱金属の使用量を少なくで
き、耐熱性が高いとともに安価に製造することが
可能である。さらに、鉄基合金製内がわチユーブ
の先端がわ部に、ニツケル基合金またはコバルト
基合金など耐熱合金製外がわチユーブを外嵌し、
前記内がわチユーブ内に前記外がわチユーブまた
は／および前記内がわチユーブの先端開口に嵌合
する鋲と棒状中心電極と一端は前記鋲に溶接され
他端は前記中心電極先端に溶接された発熱線とか
らなる中軸アセンブリを挿入し、前記鋲を前記内
がわチユーブまたは／および外がわチユーブに溶
接し、つぎに該内がわチユーブ内に電気絶縁性セ
ラミツク粉末を充填し、しかる後外がわチユーブ
および内がわチユーブを同時にスウエージング加
工して所定の外径にしぼつて発熱チユーブを製造
し、該発熱チユーブを取付金具に嵌め込むととも
に嵌合面をろう付けして製造することにより内層
および外層の結合強度が大きくできるとともに生
産性に優れ、安価に量産できる。 As described above, in the sheathed glow plug of the present invention, the sheathed tube of the heat generating tube is formed of an outer layer made of a heat-resistant metal such as a nickel-based alloy or a cobalt-based alloy, and an inner layer made of an iron-based alloy. As a result, the amount of expensive heat-resistant metals such as Ni-based alloys or Co-based alloys used can be reduced, making it possible to produce high heat resistance and at low cost. Furthermore, an outer tube made of a heat-resistant alloy such as a nickel-based alloy or a cobalt-based alloy is fitted around the tip of the inner tube made of an iron-based alloy.
A rivet and a rod-shaped center electrode are disposed inside the inner tube and fit into the outer tube and/or the tip opening of the inner tube, one end of which is welded to the rivet and the other end of which is welded to the tip of the center electrode. Insert the center shaft assembly consisting of a heated wire, weld the stud to the inner tube and/or outer tube, fill the inner tube with electrically insulating ceramic powder, and then A heat generating tube is produced by simultaneously swaging the rear outer tube and inner tube to reduce the outer diameter to a predetermined diameter, and the heat generating tube is fitted into a mounting fitting and the fitting surfaces are brazed. As a result, the bonding strength between the inner layer and the outer layer can be increased, the productivity is excellent, and mass production can be carried out at low cost.
第１図は本発明のシーズグロープラグの断面
図、第２図はその製造工程図である。
図中、１……取付金具、２……発熱チユーブ、
３……シーズチユーブ、４……中心電極、５……
発熱線、３２……耐熱金属製外層、３３……鉄基
合金製内層。
FIG. 1 is a sectional view of the sheathed glow plug of the present invention, and FIG. 2 is a diagram of its manufacturing process. In the figure, 1...Mounting bracket, 2...Heating tube,
3... Seed tube, 4... Center electrode, 5...
Exothermic wire, 32...outer layer made of heat-resistant metal, 33...inner layer made of iron-based alloy.
Claims (1)
チユーブ内に、棒状中心電極を挿入するとともに
該中心電極先端部とシーズチユーブ先端底とを発
熱線で接続し、さらに該シーズチユーブ内に電気
絶縁性セラミツク粉末を充填した発熱チユーブと
からなり、発熱チユーブをその先端がわ部が取付
金具先端から突出するよう取付金具内に嵌入して
ろう付けしてなるシーズグロープラグにおいて、 発熱チユーブのシーズチユーブは、取付金具か
ら突出している部分がニツケル基合金またはコバ
ルト基合金など耐熱金属製外層と、鉄基合金製内
層とで形成されたことを特徴とするシーズグロー
プラグ。 ２ 鉄基合金製内がわチユーブの先端がわ部に、
ニツケル基合金またはコバルト基合金など耐熱合
金製外がわチユーブを外嵌し、前記内がわチユー
ブ内に前記外がわチユーブまたは／および前記内
がわチユーブの先端開口に嵌合する鋲と棒状中心
電極と一端は前記鋲に溶接され他端は前記中心電
極先端に溶接された発熱線とからなる中軸アセン
ブリを挿入し、前記鋲を前記内がわチユーブまた
は／および外がわチユーブに溶接し、つぎに該内
がわチユーブ内に電気絶縁性セラミツク粉末を充
填し、しかる後外がわチユーブおよび内がわチユ
ーブを同時にスウエージング加工して所定の外径
にしぼつて発熱チユーブを製造し、該発熱チユー
ブを取付金具に嵌め込むとともに嵌合面をろう付
けするシーズグロープラグの製造法。[Claims] 1. A rod-shaped center electrode is inserted into a cylindrical mounting bracket and a metal sheath tube with a closed tip, and the tip of the center electrode and the bottom of the sheath tube tip are connected with a heating wire, and A sheathed glow plug consisting of a heat generating tube filled with electrically insulating ceramic powder inside the sheathed tube, and the heat generating tube is fitted into a mounting bracket and brazed so that its tip protrudes from the tip of the mounting bracket. The sheathed glow plug of the heat generating tube is characterized in that the portion protruding from the mounting bracket is formed of an outer layer made of a heat-resistant metal such as a nickel-based alloy or a cobalt-based alloy, and an inner layer made of an iron-based alloy. 2 At the tip of the inner tube made of iron-based alloy,
An outer tube made of a heat-resistant alloy such as a nickel-based alloy or a cobalt-based alloy is fitted onto the outside, and a rivet and a rod shape are fitted into the inner tube and fitted into the tip opening of the outer tube and/or the inner tube. A center shaft assembly consisting of a center electrode and a heating wire having one end welded to the stud and the other end welded to the tip of the center electrode is inserted, and the stud is welded to the inner tube and/or outer tube. Next, the inner tube is filled with electrically insulating ceramic powder, and then the outer tube and the inner tube are simultaneously swaged to a predetermined outer diameter to produce a heat generating tube, A method for manufacturing a sheathed glow plug, in which the heating tube is fitted into a mounting fitting and the fitting surface is brazed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP648482A JPS58123025A (en) | 1982-01-18 | 1982-01-18 | Sheathed glow plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP648482A JPS58123025A (en) | 1982-01-18 | 1982-01-18 | Sheathed glow plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58123025A JPS58123025A (en) | 1983-07-22 |
| JPS6262257B2 true JPS6262257B2 (en) | 1987-12-25 |
Family
ID=11639746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP648482A Granted JPS58123025A (en) | 1982-01-18 | 1982-01-18 | Sheathed glow plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58123025A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19511376A1 (en) * | 1995-03-28 | 1996-10-02 | Beru Werk Ruprecht Gmbh Co A | Glow plug |
| DE102007046808A1 (en) * | 2007-09-29 | 2009-04-02 | Man Diesel Se | Ignition device for gaseous fuel air mixture in gas engine, gas petrol engine or diesel engine, has glow plug which is provided as ignition source, and ignition device is formed as heater plug |
| JP2015155790A (en) * | 2014-01-15 | 2015-08-27 | 日本特殊陶業株式会社 | Sheath heater and glow plug |
| JP6795886B2 (en) * | 2015-02-10 | 2020-12-02 | 日本特殊陶業株式会社 | Glow plugs and their manufacturing methods |
-
1982
- 1982-01-18 JP JP648482A patent/JPS58123025A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58123025A (en) | 1983-07-22 |
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