JPH0467585B2 - - Google Patents
Info
- Publication number
- JPH0467585B2 JPH0467585B2 JP14944685A JP14944685A JPH0467585B2 JP H0467585 B2 JPH0467585 B2 JP H0467585B2 JP 14944685 A JP14944685 A JP 14944685A JP 14944685 A JP14944685 A JP 14944685A JP H0467585 B2 JPH0467585 B2 JP H0467585B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- plating
- nozzle hole
- tip
- present
- 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
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000007747 plating Methods 0.000 description 18
- 238000007796 conventional method Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Fuel-Injection Apparatus (AREA)
- Electroplating Methods And Accessories (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、デイーゼル機関等に用いられる燃料
噴射ノズルにおいて、耐久性向上を目的として実
施される燃料噴射ノズル先端部のメツキ技術の改
良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in the plating technique for the tip of a fuel injection nozzle used in a diesel engine or the like, which is carried out for the purpose of improving durability.
従来、燃料噴射ノズルの先端部は、高温で腐食
環境下にさらされるため、高温腐食及び摩耗が生
じ損傷によるトラブルがしばしば発生している。
この対策として、従来より、硬質クロームメツキ
により、上記先端部をコーデイングすることが有
効であることは周知である。従来のメツキ手法で
は、第３図に示すように、容器３′の中に電解液
４′を入れその中に燃料ノズル１′の先端部１′ａ
を浸漬して、これと電極２′との間に通電し該先
端部１′ａの周囲にクロームメツキを施こしてい
る。このような従来のメツキ手法による場合は、
第４図に示すように、先端部１′ａにコーテイン
グされたメツキ層５′の一部が噴孔１′ｂの先端に
廻りこみ突出部５′ａを構成するため、噴孔１′ｂ
の初期径が維持できずメツキ後再加工する方法が
用いられてきた。
Conventionally, the tip of a fuel injection nozzle is exposed to a high-temperature and corrosive environment, resulting in high-temperature corrosion and wear, often causing troubles due to damage.
As a countermeasure against this problem, it is well known that it is effective to code the tip portion with hard chrome plating. In the conventional plating method, as shown in FIG.
is immersed in the electrode 2', and electricity is applied between the electrode 2' and the tip 1'a to chrome plate the periphery of the tip 1'a. In the case of this conventional method,
As shown in FIG. 4, a part of the plating layer 5' coated on the tip 1'a wraps around the tip of the nozzle hole 1'b to form a protrusion 5'a.
Since the initial diameter cannot be maintained, a method of reprocessing after plating has been used.
一方、他の方法として、噴孔１′ｂにあらかじ
め詰めものをしてメツキ層の廻りこみを防止する
ことも行なわれていた。 On the other hand, as another method, the nozzle hole 1'b was filled in advance to prevent the plating layer from going around.
しかしながら上記いずれの方法も、生産性に乏
しく作業が煩雑であつた。本発明は上記問題点を
解決するためのもので、メツキの特性を積極的に
利用した新しい手法を提供することにより、生産
性が向上しかつ品質の良好な燃料噴射ノズルを得
ることを目的とする。
However, all of the above methods have poor productivity and are complicated to work with. The present invention is intended to solve the above problems, and aims to improve productivity and obtain a fuel injection nozzle of good quality by providing a new method that actively utilizes the properties of metal. do.
本発明は上記問題点を解決するため、メツキ層
の廻りこみを予め想定し、その廻りこみに相当す
る部分を噴孔加工の時点であらかじめ除去してお
くことを特徴とするものである。この方法によれ
ば、従来のメツキ手法がそのまま採用されるし、
噴孔をマスキングする煩雑さやメツキ後、硬いメ
ツキ層を除去するための加工工数の増大を防止す
ることができる。
In order to solve the above problems, the present invention is characterized in that the wrapping of the plating layer is assumed in advance, and the portion corresponding to the wrapping is removed in advance at the time of processing the injection hole. According to this method, the conventional matsuki method is adopted as is,
It is possible to prevent the complexity of masking the nozzle holes and the increase in the number of processing steps for removing the hard plating layer after plating.
以下第１図及び第２図を参照して本発明の１実
施例につき説明する。
One embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図及び第２図は、本発明の具体的実施例を
示すものである。 1 and 2 show specific embodiments of the present invention.
第１図はメツキ前の燃料噴射ノズル１の噴孔の
加工形状を示すもので、ノズル先端部１ａには複
数個の噴孔１ｂが加工される。該噴孔１ｂの先端
を開口した面取り形状１ｃに加工する。開口部１
ｃの形状は、噴孔径によつて異なるが、通常噴孔
径が0.5〜1.0mmであれば該開口部１ｃの深さａは
0.3〜0.5mm、開口角度θは20〜30゜が適当である。 FIG. 1 shows the machined shape of the nozzle hole of the fuel injection nozzle 1 before plating, and a plurality of nozzle holes 1b are machined in the nozzle tip 1a. The tip of the nozzle hole 1b is machined into a chamfered shape 1c with an open end. Opening 1
The shape of c varies depending on the diameter of the nozzle hole, but normally if the diameter of the nozzle hole is 0.5 to 1.0 mm, the depth a of the opening 1c is
Appropriate values are 0.3 to 0.5 mm, and the opening angle θ is 20 to 30 degrees.
このように加工した噴射ノズル１は、従来の方
法と全く同様に第３図に示す方法でメツキするこ
とができる。メツキ後の状況を第２図に示す。メ
ツキ層５の噴孔１ｂへの廻りこみ部分５ａは、開
孔部１ｃの部分に吸収され、噴孔１ｂの直径を狭
くすることなくほぼ均一な噴孔径が維持されるこ
とになる。 The injection nozzle 1 processed in this manner can be plated by the method shown in FIG. 3 in exactly the same manner as the conventional method. Figure 2 shows the situation after plating. The portion 5a of the plating layer 5 that wraps around the nozzle hole 1b is absorbed by the opening portion 1c, and a substantially uniform nozzle hole diameter is maintained without narrowing the diameter of the nozzle hole 1b.
本発明は以上のように構成されており、本発明
によれば、メツキ施工の生産性が高くなりノズル
の製作コスト上昇も抑制することができる。ま
た、噴孔内へ廻りこむメツキ層の形成により、噴
孔の摩耗による拡大も抑制され極めて高い品質の
燃料弁ノズルが製作が可能となる。
The present invention is configured as described above, and according to the present invention, the productivity of plating work can be increased and an increase in the manufacturing cost of the nozzle can also be suppressed. Furthermore, by forming the plating layer that extends into the nozzle hole, the expansion of the nozzle hole due to wear is suppressed, making it possible to manufacture a fuel valve nozzle of extremely high quality.
第１図及び第２図は本発明の１実施例を示し、
第１図は本発明の噴孔形状を示す拡大断面図、第
２図はメツキ後の噴孔形状を示す拡大断面図であ
る。第３図は電解メツキの手法の概要を示す断面
図、第４図は従来法によるメツキ後の噴孔形状を
示す。
１…噴射ノズル、１ａ…ノズルの先端部、１ｂ
…噴孔、１ｃ…開口部、５…メツキ層、５ａ…噴
孔の一部を構成するメツキ層。
1 and 2 show one embodiment of the present invention,
FIG. 1 is an enlarged sectional view showing the nozzle hole shape of the present invention, and FIG. 2 is an enlarged sectional view showing the nozzle hole shape after plating. FIG. 3 is a sectional view showing an outline of the electrolytic plating method, and FIG. 4 shows the shape of the nozzle hole after plating by the conventional method. 1... Injection nozzle, 1a... Nozzle tip, 1b
... Nozzle hole, 1c: Opening, 5: Plating layer, 5a: Plating layer forming part of the nozzle hole.
Claims (1)
ルを製造するに際し、噴孔の出口側をあらかじめ
初期の噴孔径よりも大きく開口した形状に加工
し、次いで該噴射ノズルの先端部の表面をメツキ
することを特徴とする燃料噴射ノズルの製造方
法。1. When manufacturing fuel injection nozzles for use in diesel engines, etc., it is recommended that the outlet side of the injection hole be shaped in advance to have a larger opening than the initial injection hole diameter, and then the surface of the tip of the injection nozzle should be plated. A method for manufacturing a characteristic fuel injection nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14944685A JPS6210468A (en) | 1985-07-08 | 1985-07-08 | Manufacture of fuel injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14944685A JPS6210468A (en) | 1985-07-08 | 1985-07-08 | Manufacture of fuel injection nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6210468A JPS6210468A (en) | 1987-01-19 |
| JPH0467585B2 true JPH0467585B2 (en) | 1992-10-28 |
Family
ID=15475294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14944685A Granted JPS6210468A (en) | 1985-07-08 | 1985-07-08 | Manufacture of fuel injection nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6210468A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5299293B2 (en) * | 2010-01-19 | 2013-09-25 | 株式会社デンソー | Fuel injection valve and manufacturing method thereof |
| JP5928395B2 (en) * | 2013-04-02 | 2016-06-01 | トヨタ自動車株式会社 | Injector diagnostic device |
| GB2530991A (en) * | 2014-10-06 | 2016-04-13 | Delphi Int Operations Luxembourg Sarl | Fuel injection nozzle |
| JP6481708B2 (en) * | 2017-04-25 | 2019-03-13 | 株式会社デンソー | Fuel injection valve |
-
1985
- 1985-07-08 JP JP14944685A patent/JPS6210468A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6210468A (en) | 1987-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4836695A (en) | Composite sliding surface bearing | |
| US4570946A (en) | Nitrided piston ring with outer layer on surface | |
| US4221639A (en) | Aluminium alloy cylinder and manufacturing method thereof | |
| JPH0467585B2 (en) | ||
| JPH061064B2 (en) | Piston ring manufacturing method | |
| JPH0151899B2 (en) | ||
| US6508240B1 (en) | Cylinder liner having EGR coating | |
| EP0927820B1 (en) | Cast cylinder block and method for manufacturing the same | |
| EP0204121A1 (en) | Method of manufacturing a valve with a high mechanical and heat resistance, also against heat corrosion, for a combustion engine using heavy oil | |
| JPS6473155A (en) | Piston for internal combustion engine | |
| US5211153A (en) | Two-cycle internal combustion gasoline engine cylinder | |
| US1426138A (en) | Piston | |
| JPH0350323A (en) | Sleeve for two cycle engine | |
| JPS61268848A (en) | Manufacture of cylinder | |
| JPS58160618A (en) | Method of crankshaft surface treatment | |
| CN86107788A (en) | The technological method of plating solid lubricant film on internal combustion engine | |
| JP4305823B2 (en) | Surface treatment masking method and apparatus | |
| JP2009275808A (en) | Metal gasket | |
| JPH0111952Y2 (en) | ||
| JPH0637544U (en) | Piston for internal combustion engine | |
| Baessler | Hard Chromium Plating in a Continuous Flow Process | |
| JPS6286198A (en) | Cylinder for internal combustion engine | |
| JPS5776214A (en) | Exhaust valve of diesel engine and manufacture therefor | |
| SU1713761A1 (en) | Shell broach | |
| JPH087071Y2 (en) | Cylinder structure of internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |