JPS608295B2 - How to combine valve stem and valve guide - Google Patents
How to combine valve stem and valve guideInfo
- Publication number
- JPS608295B2 JPS608295B2 JP8197775A JP8197775A JPS608295B2 JP S608295 B2 JPS608295 B2 JP S608295B2 JP 8197775 A JP8197775 A JP 8197775A JP 8197775 A JP8197775 A JP 8197775A JP S608295 B2 JPS608295 B2 JP S608295B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve stem
- guide
- valve guide
- 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
Landscapes
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】
本発明は、バルブステムとバルブガイドとの組合わせ方
法に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of combining a valve stem and a valve guide.
このバルブステムとバルブガイドは、直接もしくは間接
的に燃焼室に接して設けられているため、エンジンの作
動中は常に高温にさらされ、しかも激しく相対的に摺動
するものである。Since the valve stem and valve guide are provided in direct or indirect contact with the combustion chamber, they are constantly exposed to high temperatures during engine operation, and moreover, they slide violently relative to each other.
従ってこの両者は耐摩耗性と耐スカッフィング性とを同
時に具備していることが重要である。ところで、従来の
バルブステムとバルブガイドとの組合わせに於ては耐摩
耗性上バルブステムの外表面に硬質クロムメッキ処理や
、窒化処理等の表面処理を施していた。しかしながらバ
ルブステム外周面に対する表面処理は非常に多くの労力
と時間を要すると共に、硬質クロムメッキの場合はその
オイル保持性に難点があり、耐スカッフィング性に不充
分である。Therefore, it is important that both have wear resistance and scuffing resistance at the same time. By the way, in the conventional combination of a valve stem and a valve guide, the outer surface of the valve stem is subjected to surface treatment such as hard chromium plating or nitriding to improve wear resistance. However, surface treatment of the outer circumferential surface of the valve stem requires a great deal of labor and time, and in the case of hard chrome plating, it has difficulty in retaining oil and is insufficient in scuffing resistance.
本発明は上言己に鑑み成されたものであって、優れた耐
摩耗性と耐スカッフィング性とを同時に具備したバルブ
ステムとバルブガイドとの組合わせ方法を提供しようと
するものである。即ち、本発明は材質をＨＶ２００〜５
００の範囲の耐熱鋼から選択し、かつ外表面には全く表
面処理を施さないバルブステムと、面積比率にして１〜
２０％の黒鉛と０．５〜２２％のＦｅ，Ｃｒ，Ｍｏ，Ｗ
、の一種もしくは二種以上の炭化物とを同時に析出分布
せしめた鉄系焼結合金製のバルブガイドとを組合わせる
ことを特徴とする組合わせ方法である。The present invention has been made in view of the above, and it is an object of the present invention to provide a method of combining a valve stem and a valve guide that simultaneously has excellent wear resistance and scuffing resistance. That is, in the present invention, the material is HV200-5.
The valve stem is selected from heat-resistant steel in the range of 0.00 and has no surface treatment on the outer surface, and the area ratio is 1 to 1.
20% graphite and 0.5-22% Fe, Cr, Mo, W
This is a combination method characterized by combining a valve guide made of an iron-based sintered alloy in which one or more types of carbides are simultaneously precipitated and distributed.
以下、本発明の組合わせ方法につき説明する。先ず、バ
ルブステムは硬度ＨＶ２００〜５００の範囲の耐熱鋼（
ＪＩＳＧ４３１１に記載された耐熱鋼）にて製作し、し
かも、バルブステム外表面には全く表面処理を施さない
バルブステムと成す。この場合、バルブステムの硬度が
ＨＶ２００以下ではバルブステム外表面にスカッフィン
グが発生し易くなるとともに強度的に弱くなり、又ＨＶ
５００以上とではバルブガイド内周面の摩耗が著しく増
大する傾向となる。The combination method of the present invention will be explained below. First, the valve stem is made of heat-resistant steel with a hardness in the range of HV200-500 (
The valve stem is made of heat-resistant steel (as specified in JIS G4311), and the outer surface of the valve stem is not subjected to any surface treatment. In this case, if the hardness of the valve stem is less than HV200, scuffing is likely to occur on the outer surface of the valve stem, and the strength is weakened.
If it is 500 or more, wear on the inner circumferential surface of the valve guide tends to increase significantly.
従ってバルブステムの材質としては硬度ＨＶ２００〜５
００の範囲の耐熱鋼から選択し設定する必要がある。次
に相手側バルブガィド‘こついては面積比率にして１〜
２０％の黒鉛および０．５〜２２％のＦｅ，Ｃｒ，Ｍｏ
，Ｗの一種もしくは二種以上の炭化物を分布せしめた鉄
系焼結合金にて構成する。Therefore, the material for the valve stem should have a hardness of HV200 to 5.
It is necessary to select and set from heat-resistant steel in the range of 00. Next, the other valve guide's area ratio is 1~
20% graphite and 0.5-22% Fe, Cr, Mo
, W is made of an iron-based sintered alloy in which one or more carbides of W are distributed.
黒鉛の析出分布が面積比にして１％以下では所望の耐ス
カツフィング性および耐摩耗性が得られず、また、２０
％以上では強度が低下する傾向となる。If the graphite precipitation distribution is less than 1% in terms of area ratio, desired scuffing resistance and wear resistance cannot be obtained;
% or more, the strength tends to decrease.
次に炭化物の咳出分布については面積比にして０．５％
以下では耐摩耗性が低下し、２２％以上となると強度が
著しく低下すると共に加工性の低下をきたす傾向となる
。Next, regarding the cough distribution of carbide, the area ratio is 0.5%.
If it is less than 22%, the wear resistance decreases, and if it exceeds 22%, the strength tends to decrease significantly and the workability tends to decrease.
尚、本発明に用いられるバルブガイドの炭化物はＦｅ，
Ｃｒ，Ｍｏ，Ｗ等の一種もしくは二種以上とする。The carbide of the valve guide used in the present invention is Fe,
One or more of Cr, Mo, W, etc. may be used.
本発明のバルブステムとバルブガイドとの組合わせ方法
においては、特にバルブガイドにおいて本発明に用いる
バルブガイドは自己潤滑性とオイル潤滑性とに優れた黒
鉛を析出させてあるため耐スカツフイング性に極めて優
れ、しかも、高硬度の炭化物も同時に析出分布させたの
で優れた耐摩耗性をも同時に発揮することが可能である
。In the method of combining the valve stem and valve guide of the present invention, the valve guide used in the present invention has extremely high scuffing resistance because it has precipitated graphite that has excellent self-lubricity and oil lubricity. Moreover, since high-hardness carbides are also precipitated and distributed at the same time, it is possible to exhibit excellent wear resistance at the same time.
また、本発明に用いるバルブガイドはこのように構成し
たので、これを特定の硬度の耐熱鋼で製作したバルブス
テムと組合わせた場合はその外表面に全く表面処理を施
さないともバルブステムとバルブガイドの両者が共に優
れた耐摩耗性と耐スカッフィング性とを発揮し、安定に
して良好なる作動を行うものである。のみならずこのよ
うに本発明の組合わせ方法に於ては、バルブステムの外
表面に対する表面処理を全く必要としないため、製造コ
ストを著しく安価ならしめることが可能である。次に上
記本発明の組合わせ方法の優秀性を立証するため下記の
如くの試験を行った。In addition, since the valve guide used in the present invention is constructed in this way, when it is combined with a valve stem made of heat-resistant steel of a specific hardness, the valve stem and valve can be combined without any surface treatment on the outer surface. Both guides exhibit excellent wear resistance and scuffing resistance, and perform stable and good operation. Furthermore, in the combination method of the present invention, there is no need for any surface treatment on the outer surface of the valve stem, making it possible to significantly reduce manufacturing costs. Next, in order to prove the superiority of the combination method of the present invention, the following tests were conducted.
１ 耐摩耗性試験
バルブステム用材及びバルブガイド用材として第１表に
示す組合わせの試料を作成した。1 Wear Resistance Test Samples of the combinations shown in Table 1 were prepared as valve stem materials and valve guide materials.
第１表このように形成した試料を回転式摩耗試験機を用
い、本発明及び従来の組合わせに用いるバルブガイド用
試料（１５ｍｍ×２仇ｈｍ×７ｍｍ）を固定片とし、か
かる固定片を回転片としての本発明及び従来の組合わせ
に用いるバルブステム用試料（円板状）上面にそれぞれ
圧俵し、その圧援面に対し、常時潤滑油を供給しつつ円
板状試料を回転させ、運転後の摩耗量を測定した。Table 1 The samples thus formed were tested using a rotary abrasion tester, using a valve guide sample (15 mm x 2 mm x 7 mm) used in the present invention and conventional combination as a fixed piece, and rotating the fixed piece. A pressure bale is placed on the upper surface of a valve stem sample (disc-shaped) used in the present invention and the conventional combination as a piece, and the disc-shaped sample is rotated while constantly supplying lubricating oil to the compressed surface. The amount of wear after operation was measured.
試験条件潤滑油温度：８０００
潤滑油量 ：０．６ぞ／ｈｒ
潤滑油 ：ダフニオイル＃６５（５０％）十灯油（５
０％）荷重 ：２０ｋ９／地
摩耗速度 ：胸／ｓｅｃ
走行距離 ：３００物
上記、試験結果は第１図に示す如くである。Test conditions Lubricating oil temperature: 8000 Lubricating oil amount: 0.6 zo/hr Lubricating oil: Daphne oil #65 (50%) kerosene (5
0%) Load: 20k9/Ground wear rate: Chest/sec Travel distance: 300 The above test results are as shown in Figure 1.
２ 耐スカッフィング性試験
耐摩耗性試験と同一試験機を用い、一時間走行させ、ス
カッフィングを発生しない時、圧接荷重を漸次増大せし
め、スカッフィングの発生する限界荷重を求める。2 Scuffing resistance test Using the same testing machine as used for the wear resistance test, run for one hour, and when no scuffing occurs, gradually increase the pressure welding load and find the limit load at which scuffing occurs.
試験条件 荷重 ：スタート２０ｋｇ／の 走行時間：ピッチ ５ｋ９／均 各ピッチ 毎１時間 上記の以外の条件は耐摩耗試験と同一。Test condition Load: starting 20kg/ Running time: pitch 5k9/average Each pitch every 1 hour Conditions other than the above are the same as the wear resistance test.
上記試験結果は下記の通りである。The above test results are as follows.
以上、試験結果から明らかな如く、本発明の相対的組合
わせが耐摩耗及び耐スカツフィング性のいずれの点に於
いても優れていることが判明した。As is clear from the above test results, it has been found that the relative combination of the present invention is excellent in both wear resistance and scuffing resistance.
第１図は耐摩試験結果を示すグラフを示すものである。 図船 FIG. 1 shows a graph showing the results of the wear resistance test. illustration ship
Claims (1)
ら選択し、かつ外表面には全く表面処理を施さないバル
ブステムと、面積比準にして、１〜２０％の黒鉛と０．
５〜２２％のＦｅ，Ｃｒ，Ｍｏ，Ｗ、の一種もしくは二
種以上の炭化物とを同時に析出分布せしめた鉄系焼結合
金製のバルブガイドとを組合わせることを特徴とするバ
ルブステムとバルブガイドとの組合わせ方法。1. A valve stem whose material is selected from heat-resistant steel with a hardness in the range of HV 2.00 to HV 500 and whose outer surface is not subjected to any surface treatment, and which is made of 1 to 20% graphite and 0.5% graphite on an area basis.
A valve stem and a valve characterized in that they are combined with a valve guide made of an iron-based sintered alloy in which 5 to 22% of one or more carbides of Fe, Cr, Mo, and W are simultaneously precipitated and distributed. How to combine with guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8197775A JPS608295B2 (en) | 1975-07-04 | 1975-07-04 | How to combine valve stem and valve guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8197775A JPS608295B2 (en) | 1975-07-04 | 1975-07-04 | How to combine valve stem and valve guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS526318A JPS526318A (en) | 1977-01-18 |
| JPS608295B2 true JPS608295B2 (en) | 1985-03-01 |
Family
ID=13761538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8197775A Expired JPS608295B2 (en) | 1975-07-04 | 1975-07-04 | How to combine valve stem and valve guide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608295B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780418A (en) * | 1980-11-07 | 1982-05-20 | Takeda Chem Ind Ltd | Production of polyurethane foam |
| DE19510108C1 (en) * | 1995-03-20 | 1996-02-15 | Bayerische Motoren Werke Ag | Valve shaft guide for gas exchange valves in IC engines |
| JP2005054617A (en) * | 2003-08-08 | 2005-03-03 | Nissan Motor Co Ltd | Valve system |
| JP6379959B2 (en) * | 2014-10-07 | 2018-08-29 | 株式会社デンソー | Refrigeration cycle compressor |
| KR102603584B1 (en) | 2016-05-09 | 2023-11-20 | 엘지전자 주식회사 | Stand for Cleaner |
| WO2017195999A1 (en) | 2016-05-09 | 2017-11-16 | 엘지전자 주식회사 | Vacuum stand |
| WO2017196000A1 (en) | 2016-05-09 | 2017-11-16 | 엘지전자 주식회사 | Vacuum stand |
-
1975
- 1975-07-04 JP JP8197775A patent/JPS608295B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS526318A (en) | 1977-01-18 |
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