JPS60166710A - Manufacture of poppet valve - Google Patents
Manufacture of poppet valveInfo
- Publication number
- JPS60166710A JPS60166710A JP239885A JP239885A JPS60166710A JP S60166710 A JPS60166710 A JP S60166710A JP 239885 A JP239885 A JP 239885A JP 239885 A JP239885 A JP 239885A JP S60166710 A JPS60166710 A JP S60166710A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- sheet member
- mushroom
- shaped
- sheet
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
- F01L3/04—Coated valve members or valve-seats
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Abstract
Description
【発明の詳細な説明】 いられるきのこ状弁の製造方法に関する。[Detailed description of the invention] The present invention relates to a method for producing mushroom-shaped valves.
従来、この種きのこ状弁は、第１図および第２図に示す
ように、弁本体１の傘部１ｂ外周に弁のシート部２ａを
構成する材料をアークまたはガス焔を用いて溶融肉盛し
、最終機械加工を行って完成させている。Conventionally, this kind of mushroom-shaped valve has been manufactured by melting and overlaying the material constituting the valve seat part 2a on the outer periphery of the umbrella part 1b of the valve body 1 using an arc or gas flame, as shown in FIGS. 1 and 2. The final machining process is then completed.
上記シート部２ａを構成する材料は、きのこ状弁の機能
上、特に高温（約４００〜７００℃）での耐摩耗性が要
求される。したがって、この種材料には、高温でのかた
さの高い特殊合金にッケル基合金またはコバルト基合金
）が用いられるのが一般的である。まだ、最近では、き
のこ状弁の寿命の延長を図るために同系材料でも含有元
素量を変えてさらに硬い材料を溶融肉盛したものが捉供
され、実験的に使用されている。The material constituting the seat portion 2a is required to have wear resistance particularly at high temperatures (approximately 400 to 700° C.) in view of the functionality of the mushroom-shaped valve. Therefore, for this type of material, special alloys with high hardness at high temperatures (such as nickel-based alloys or cobalt-based alloys) are generally used. However, recently, in order to extend the service life of mushroom-shaped valves, similar materials with different amounts of elements and melt overlays with even harder materials have been obtained and used experimentally.
しかしながら、従来の溶融肉盛によって弁シート部２ａ
を形成させるきのこ状弁ではシート部２ａのかたさが高
くなるにつれて、溶融肉盛がむずかしく、溶接の途中お
よび直後に割れが発生しやす（なる。また、仮りに溶接
による割れが発生しなくても、該きのこ状弁の使用中に
生じる熱応力および衝撃力等によって割れを生じ、耐摩
耗性は向上しえても、別の原因により結果的には弁の寿
命延長は図れないことになる。したがって溶融肉盛によ
って弁シート部２ａを構成させた従来のきのこ状弁はそ
の寿命に限界があり、耐久性をより向上することは望め
ずまた弁の製造工数も増加するという問題点があった。However, by conventional melt overlay, the valve seat portion 2a
In the case of a mushroom-shaped valve that forms a mold, as the hardness of the seat portion 2a increases, melt overlay becomes difficult, and cracks are likely to occur during and immediately after welding.Also, even if cracks do not occur due to welding, , cracks occur due to thermal stress and impact force generated during use of the mushroom-shaped valve, and even though wear resistance may be improved, the life of the valve cannot be extended due to other causes. Conventional mushroom-shaped valves in which the valve seat portion 2a is formed by melt overlaying have a limited lifespan, cannot be expected to further improve durability, and have problems in that the number of manufacturing steps for the valve increases.
本発明は上記に鑑みなされたもので、耐久性が犬で製造
の容易なきのこ状弁を提供することを目的とする。The present invention has been made in view of the above, and it is an object of the present invention to provide a mushroom-shaped valve that is durable and easy to manufacture.
以下本発明の１実施例を第３図および第４図により説明
する。An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.
第３図において１は弁本体であり、その傘部１ｂの外周
にシート部材の接合面１ａが形成される。In FIG. 3, 1 is a valve body, and a joint surface 1a of a sheet member is formed on the outer periphery of an umbrella portion 1b.
２は、上記弁本体１とは別個にあらかじめ粉末を焼結し
て作られた環状の焼結ステライトからなるシート部材で
あり、その内側に接合用内面２ａが形成される。該接合
面１ａは、第３図及び第４図に示すように、直状円錐面
に形成される。Reference numeral 2 denotes a sheet member made of annular sintered stellite, which is made by sintering powder in advance separately from the valve body 1, and a joining inner surface 2a is formed inside the sheet member. The joint surface 1a is formed into a straight conical surface, as shown in FIGS. 3 and 4.
上記弁本体１とシート部材２とは、両者の接合面１ａお
よび接合用内面２ａを拡散溶接、摩擦溶接。The valve body 1 and the seat member 2 are welded by diffusion welding and friction welding at their joint surface 1a and joint inner surface 2a.
鍛接、高温ろう接等適当な方法で接合する。更に第４図
に示すように、シート部材２に最終機械加工を施して弁
座（図示せず）とのシート面２ｂを形成させる。Join by an appropriate method such as forge welding or high temperature brazing. Further, as shown in FIG. 4, the seat member 2 is subjected to a final machining process to form a seat surface 2b with a valve seat (not shown).
このように本発明方法により製造されたきのこ状弁は、
従来のきのこ状弁にくらべ傘部１ｂに装着されるシート
部材２の構成に大きな特徴を有するものである。The mushroom-shaped valve thus manufactured by the method of the present invention is
Compared to conventional mushroom-shaped valves, this valve has a major feature in the structure of the seat member 2 attached to the umbrella portion 1b.
以下に、本発明に係るきのこ状弁の特徴とその効果につ
いて記述する。Below, the features and effects of the mushroom-shaped valve according to the present invention will be described.
本発明に係るきのこ状弁の特徴の第１は弁のシート部材
２０品質安定と向上を図るため、該シート部材２を環状
の部材で構成したことである。これによって少なくとも
従来のきのこ状弁の欠点である肉盛溶接者の技量に依存
する品質のバラツキがなくなる。The first feature of the mushroom-shaped valve according to the present invention is that the seat member 2 of the valve is constructed of an annular member in order to stabilize and improve the quality of the seat member 20. This eliminates at least the variation in quality that depends on the skill of the overlay welder, which is a drawback of conventional mushroom-shaped valves.
また上記きのこ状弁の特徴の第２は、シート部材２を構
成する環状の部材に粉末を焼結して製作した焼結ステラ
イトを用いたことである。The second characteristic of the mushroom-shaped valve is that the annular member constituting the seat member 2 is made of sintered stellite produced by sintering powder.
焼結ステライトは溶融・凝固の過程を経ないため、従来
のきのこ状弁のシート部材２の溶融肉盛部にくらべ結晶
構造が均一で微細である。したがって、該シート部材２
のかたさを同一にした場合、従来のきのこ状弁よりも極
めて割れにくいシート部材２を提供することができる。Since sintered stellite does not go through the process of melting and solidifying, its crystal structure is more uniform and finer than that of the melted overlay part of the sheet member 2 of the conventional mushroom-shaped valve. Therefore, the sheet member 2
When the hardness is the same, it is possible to provide a sheet member 2 that is much more difficult to break than conventional mushroom-shaped valves.
すなわち従来のきのこ状弁のシート部材を構成する材料
よりも硬い材料の使用が可能となる。In other words, it is possible to use a harder material than the material constituting the seat member of conventional mushroom-shaped valves.
環状のステライト部材は、例えば鋳造などにより製作す
ることもできる。従来のきのこ状弁においては、溶融・
凝固の過程を経てシート部材２が形成されるため、結晶
構造が粗粒化したり方向性を有するようになる。このた
め前述したように、硬いシート部材を使用した場合には
シート面に割れが発生しやすいという問題点があった。The annular stellite member can also be manufactured, for example, by casting. In conventional mushroom-shaped valves, melting and
Since the sheet member 2 is formed through the solidification process, the crystal structure becomes coarse grained and has directionality. For this reason, as described above, when a hard sheet member is used, there is a problem in that cracks are likely to occur on the sheet surface.
本発明に係るきのこ状弁のシート部材は、従来のシート
部材にみられるような、鋳造あるいは溶融肉盛りによる
結晶構造の欠点をなくすため、微細で方向性のない結晶
構造を有する焼結合金（焼結ステライト）を使用してい
るので、弁の寿命を従来のものよりも大幅に延長させる
ことができる。The seat member of the mushroom-shaped valve according to the present invention is made of a sintered alloy ( Since the valve uses sintered stellite (sintered stellite), the life of the valve can be significantly extended compared to conventional valves.
更に、上記きのこ状弁の特徴の第３は、環状のシート部
材を弁本体に装着する方法に広い自由度があることであ
る。すなわち、拡散溶接。Furthermore, the third feature of the mushroom-shaped valve is that there is a wide degree of freedom in the method of attaching the annular seat member to the valve body. Namely, diffusion welding.
摩擦溶接、鍛接、および高温ろう接等の装着法が適用で
きる。また、きのこ状弁の構造によっては電子ビーム溶
接の適用も可能である。これらの装着法は現在では技術
的に十分確立された方法であり、しかも自動溶接法であ
るため製造工数も少な（なる。Attachment methods such as friction welding, forge welding, and high temperature brazing can be applied. Furthermore, depending on the structure of the mushroom-shaped valve, electron beam welding can also be applied. These mounting methods are now technically well-established methods, and since they are automatic welding methods, the number of manufacturing steps is small.
本発明に係るきのこ状の特徴の第４は、弁本体１とシー
ト部材２とが接合する固着接合面を直状円錐面に加工形
成したことである。これにより接合面の加工が簡素化さ
れ、かつ容易で、安価な弁を提供できる。また弁本体及
びシート部材両部材の接合面を精度よく重ね合せること
ができるため両者の固着が容易であることである。The fourth mushroom-shaped feature of the present invention is that the fixed joint surface where the valve body 1 and the seat member 2 are joined is formed into a straight conical surface. This simplifies the machining of the joint surface and provides an easy and inexpensive valve. Furthermore, since the joining surfaces of the valve body and the seat member can be overlapped with high precision, it is easy to fix them together.
上記のように、本発明に係るきのこ状弁は、シート部の
硬さを上げても割れの発生がなく、従って従来のものよ
りもシート部の硬さを上昇せしめることができ、弁の耐
久性が向上する。As mentioned above, the mushroom-shaped valve according to the present invention does not crack even if the hardness of the seat part is increased, and therefore the hardness of the seat part can be increased compared to conventional ones, and the valve has a long lifespan. Improves sex.
また弁の製造コストも低床である。Also, the manufacturing cost of the valve is low.
第１図及び第２図−は従来のきのこ状弁の１例を示す外
観図である。第３図及び第４図は本発明の１実施例を示
す外観図で、第３図はシート部材を弁本体に装着する前
の図、第４図は装着後の図である。
■・・・弁本体、１ｂ・・・傘部、２・・・シート部材
、２ｂ・・・シート面。
代理人坂 間 暁FIGS. 1 and 2 are external views showing an example of a conventional mushroom-shaped valve. 3 and 4 are external views showing one embodiment of the present invention, with FIG. 3 being a view before the seat member is attached to the valve body, and FIG. 4 being a view after being attached. ■... Valve body, 1b... Umbrella portion, 2... Seat member, 2b... Seat surface. Agent Akira Sakama
Claims (1)
するにあたり、上記きのこ状弁の弁本体の傘部外周の上
部に直状円錐面からなる接合面を形成し、焼結合金から
なる環状のシート部材をその接合用内面が上記弁本体の
接合面と同一形状になるように該弁本体とは別個に製作
し、次いで該シート部材の内面を上記弁本体の接合面に
ろう付等により接着して上記シート部材を上記弁本体に
固着することを特徴とするきのこ状弁の製造方法。In manufacturing mushroom-shaped valves used in intake/exhaust valves for internal combustion engines, etc., a joint surface consisting of a straight conical surface is formed on the upper part of the outer periphery of the cap of the valve body of the mushroom-shaped valve, and a joint surface is formed from a sintered alloy. An annular seat member is manufactured separately from the valve body so that its joining inner surface has the same shape as the joining surface of the valve body, and then the inner surface of the seat member is brazed to the joining surface of the valve body. A method for manufacturing a mushroom-shaped valve, characterized in that the sheet member is fixed to the valve body by adhesion or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP239885A JPS60166710A (en) | 1985-01-10 | 1985-01-10 | Manufacture of poppet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP239885A JPS60166710A (en) | 1985-01-10 | 1985-01-10 | Manufacture of poppet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60166710A true JPS60166710A (en) | 1985-08-30 |
Family
ID=11528132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP239885A Pending JPS60166710A (en) | 1985-01-10 | 1985-01-10 | Manufacture of poppet valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60166710A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53123313A (en) * | 1977-04-04 | 1978-10-27 | Riken Piston Ring Ind Co Ltd | Sintered alloy for valve seat |
| JPS547014A (en) * | 1977-06-17 | 1979-01-19 | Mitsubishi Heavy Ind Ltd | Mushroom valve |
-
1985
- 1985-01-10 JP JP239885A patent/JPS60166710A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53123313A (en) * | 1977-04-04 | 1978-10-27 | Riken Piston Ring Ind Co Ltd | Sintered alloy for valve seat |
| JPS547014A (en) * | 1977-06-17 | 1979-01-19 | Mitsubishi Heavy Ind Ltd | Mushroom valve |
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