JPS62150015A - Manufacture of cylinder head - Google Patents
Manufacture of cylinder headInfo
- Publication number
- JPS62150015A JPS62150015A JP29017485A JP29017485A JPS62150015A JP S62150015 A JPS62150015 A JP S62150015A JP 29017485 A JP29017485 A JP 29017485A JP 29017485 A JP29017485 A JP 29017485A JP S62150015 A JPS62150015 A JP S62150015A
- Authority
- JP
- Japan
- Prior art keywords
- valve seat
- cylinder head
- mounting part
- heat resistance
- hard material
- 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
- F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は内燃機関用・／リンダヘノじの製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a cylinder head joint for an internal combustion engine.
従来の内燃機関用シリンダヘッドの弁座部は、第３図又
は第４図に示すものが使用されている。As a conventional valve seat portion of a cylinder head for an internal combustion engine, one shown in FIG. 3 or 4 is used.
第３図のものは、吸気弁座および排気弁座２がシリンダ
ヘッド１に直接加工して形成されており、弁座２はシリ
ンダヘッド１と同一材質（通常は鋳鉄等）である。In the one shown in FIG. 3, an intake valve seat and an exhaust valve seat 2 are formed by directly machining the cylinder head 1, and the valve seat 2 is made of the same material as the cylinder head 1 (usually cast iron or the like).
第４図のものは、弁座の耐久性を向上させたものの１例
を示す。図において、シリンダヘッド１には、耐熱、耐
磨耗性が高い特殊合金等からなる弁座部材７を圧入寺に
より取付は該弁座部材７に弁座２を形成している。FIG. 4 shows an example of a valve seat with improved durability. In the figure, a valve seat member 7 made of a special alloy with high heat resistance and abrasion resistance is attached to a cylinder head 1 by press-fitting to form a valve seat 2.
しかしながら上記従来のものは下記問題点がある。第３
図のものは製造コストは安価であるが、耐熱性、耐久性
に乏しい。また第４図のものは、耐熱性、耐久性は得ら
れるが。However, the above conventional method has the following problems. Third
The one shown in the figure is inexpensive to manufacture, but has poor heat resistance and durability. Also, the one in Figure 4 provides heat resistance and durability.
弁座部材７を圧入するためシリンダヘッド自体の強度が
低下し、また製造コストが尚くなる。Since the valve seat member 7 is press-fitted, the strength of the cylinder head itself is reduced and the manufacturing cost is further increased.
本発明は上記に濫みなさｎたもので、シリンダヘッドの
弁座部にステライト、タングステンカーバイド等の硬質
部材をレーザにて肉盛し硬１ヒすることによりｔ１耐熱
性、耐久性の高い弁座を有する７リンダヘノドを、該ヘ
ッド自体の強度を低下させることなく、かつ安価に提供
することを目的とする。The present invention has not gone beyond the above, and has achieved a valve seat with high T1 heat resistance and durability by overlaying and hardening a hard material such as stellite or tungsten carbide on the valve seat part of the cylinder head using a laser. It is an object of the present invention to provide a 7 cylinder head having the following characteristics at a low cost without reducing the strength of the head itself.
本発明はかかる問題点を解決するため、シリンダヘッド
の弁座取付部に、ステライト。In order to solve this problem, the present invention uses Stellite in the valve seat mounting part of the cylinder head.
タングステンカーバイド等からなる硬質材料をレーザに
て肉盛りして該肉盛部に弁座を形成したことを特徴とし
ている。The valve seat is characterized in that a hard material made of tungsten carbide or the like is built up using a laser, and a valve seat is formed in the built-up part.
本発明によれば弁座はステライト又はタングステンカー
バイド等の耐熱、耐磨耗性材料が溶接されているので、
該弁座部は十分な耐熱性、耐久性が得られる。According to the present invention, the valve seat is welded with heat-resistant and wear-resistant material such as Stellite or tungsten carbide.
The valve seat portion has sufficient heat resistance and durability.
また、弁座部に硬質材料をレーザにて溶接するのみで弁
座を構成できるので、従来のもののような正大作業等が
不要であり・機関の製造コストは安価となる。In addition, since the valve seat can be constructed by simply welding a hard material to the valve seat using a laser, there is no need for the work required in the conventional valve seat, and the manufacturing cost of the engine is reduced.
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
き説明すると１図において１はシリンダヘッド、３は該
シリンダへノド１に形成された排気通路、４はバルブガ
イド、５は排気弁である。Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 1, 1 is a cylinder head, 3 is an exhaust passage formed in the nozzle 1 to the cylinder, 4 is a valve guide, and 5 is a cylinder head. It's an exhaust valve.
６は上記シリンダヘッド１の弁座部に肉盛υされたステ
ライト、タングステンカーバイド等の硬質材料からなる
弁座部材である。Reference numeral 6 denotes a valve seat member made of a hard material such as stellite or tungsten carbide, which is overlaid on the valve seat portion of the cylinder head 1.
上記弁座部材６は１次の方法により肉盛９する。The valve seat member 6 is overlaid 9 by the first method.
シリンダペッド１に弁座の取付部１ａを機械加工にて上
記弁座部材６の肉盛厚さを考慮した寸法に仕上げる。次
に該弁座取付部１ａに下記に示す施行条件でステライト
Ｎｏ、６からなる弁座部材６をレーザにて溶接する。The mounting portion 1a of the valve seat on the cylinder ped 1 is machined to a size that takes into consideration the build-up thickness of the valve seat member 6. Next, a valve seat member 6 made of Stellite No. 6 is welded to the valve seat mounting portion 1a using a laser under the following conditions.
施行条件
レーザ出カニ ２．５ ｋｗ
走査速度＝０．２〜０．５ ｍ／ｍ ｉｎビーム幅：５
、Ｏｍｍ
シールドガス：サイトシールド
Ｈｅ ５０ ｌｉｔ／ｍｉｎ
添加粉末剤ニステライトＮｏ＋６＋ ニクロブレーズ
セメントに予め溶いて
母材に塗布
塗布厚さ：０．５ｍｍ〜１．５ｍｍ
母 材： Ｆｅ１２
肉盛部深さ： ０．９ ｍｍ
硬度（Ｈｖ５００ｇ） ：６００（ｇさ０．１ ｍｍ
〜１． Ｏｍｍ間）
上記レーザ溶接後は、弁座部材６の表面を研磨等により
所定の寸法に仕上げて弁座２を形成する。Implementation conditions Laser output 2.5 kW Scanning speed = 0.2 to 0.5 m/m In beam width: 5
, Omm Shielding gas: Sight shield He 50 liter/min Additive powder Nysterite No+6+ Dissolved in Nicrobraze cement in advance and applied to base material Application thickness: 0.5mm to 1.5mm Base material: Fe12 Overlay depth: 0 .9 mm Hardness (Hv500g): 600 (g 0.1 mm
~1. After the laser welding, the valve seat 2 is formed by finishing the surface of the valve seat member 6 to a predetermined dimension by polishing or the like.
伺２本発明はシリンダへノドの吸気弁取付部にも適用で
きる。2. The present invention can also be applied to the intake valve mounting portion at the throat of the cylinder.
本発明は以上のように構成されており２本発明によれニ
ーｆ、下記の効果がある。The present invention is constructed as described above, and has two advantages as described below.
（１）シリンダヘッドの製造コストが安くかつ弁座の耐
久性が大きい。(1) The production cost of the cylinder head is low and the valve seat is highly durable.
（２）従来の弁座圧入式に比較して弁の傘部外径を大き
くできるので２機関の出力増大かはかれる。(2) Compared to the conventional valve seat press-fit type, the outer diameter of the valve head can be made larger, which increases the output of the two engines.
（３）弁座圧入式に比較して弁座の熱伝導が良好である
ので、弁座部及び排気弁傘部の温度が低下し２機関の出
力増加が期待できる。(3) Compared to the valve seat press-fit type, the heat conduction of the valve seat is better, so the temperature of the valve seat and exhaust valve head is reduced, and an increase in the output of the two engines can be expected.
（４）弁座圧入式に比較して、弁座の圧入によるシリン
ダヘッド自体の強度低下や、弁座部材の脱落等がないの
で、信頼性の高いシリンダヘッドが得られる。(4) Compared to the valve seat press-fit type, there is no reduction in the strength of the cylinder head itself due to press-fitting of the valve seat, and there is no dropout of the valve seat member, so a highly reliable cylinder head can be obtained.
第１図は本発明に係るシリンダヘッドの断面図、第２図
は第１図のＡ部詳細断面図、第３図及び第４図は従来の
シリンダヘッドの１例を示す第１図応当図である。FIG. 1 is a sectional view of a cylinder head according to the present invention, FIG. 2 is a detailed sectional view of section A in FIG. 1, and FIGS. 3 and 4 are views corresponding to FIG. 1 showing an example of a conventional cylinder head. It is.
Claims (1)
後、該取付部にステライト、タングステンカーバイド等
の硬質材料からなる弁座部材をレーザにより肉盛りし、
該肉盛部に弁座を形成することを特徴とするシリンダヘ
ッドの製造方法。After forming a valve seat mounting part on the cylinder head by machining, a valve seat member made of a hard material such as stellite or tungsten carbide is built up on the mounting part using a laser,
A method for manufacturing a cylinder head, comprising forming a valve seat in the built-up portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29017485A JPS62150015A (en) | 1985-12-23 | 1985-12-23 | Manufacture of cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29017485A JPS62150015A (en) | 1985-12-23 | 1985-12-23 | Manufacture of cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62150015A true JPS62150015A (en) | 1987-07-04 |
Family
ID=17752706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29017485A Pending JPS62150015A (en) | 1985-12-23 | 1985-12-23 | Manufacture of cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62150015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4957081A (en) * | 1988-08-30 | 1990-09-18 | Toyota Jidosha Kabushiki Kaisha | Combustion chamber of an engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6176744A (en) * | 1984-09-25 | 1986-04-19 | Toyota Motor Corp | Valve-seatless light alloy cylinder head |
-
1985
- 1985-12-23 JP JP29017485A patent/JPS62150015A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6176744A (en) * | 1984-09-25 | 1986-04-19 | Toyota Motor Corp | Valve-seatless light alloy cylinder head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4957081A (en) * | 1988-08-30 | 1990-09-18 | Toyota Jidosha Kabushiki Kaisha | Combustion chamber of an engine |
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