JPH0418992B2 - - Google Patents
Info
- Publication number
- JPH0418992B2 JPH0418992B2 JP57219575A JP21957582A JPH0418992B2 JP H0418992 B2 JPH0418992 B2 JP H0418992B2 JP 57219575 A JP57219575 A JP 57219575A JP 21957582 A JP21957582 A JP 21957582A JP H0418992 B2 JPH0418992 B2 JP H0418992B2
- Authority
- JP
- Japan
- Prior art keywords
- stem
- grindstone
- stem portion
- engine valve
- rounded
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/16—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Description
【発明の詳細な説明】
この発明は混合ガスの吸入や排気ガスの排出を
行なうエンジン用バルブの加工方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an engine valve for intake of mixed gas and discharge of exhaust gas.
一般に、上記エンジン用バルブは、ステム部お
よびこれに連続するアール部を介してシート面が
形成されてなる。上記ステム部はシリンダヘツド
に形成された軸受部に摺動自在に支持されてい
る。そして、このバルブはピストンの動きに連動
し、そのシート面によつて混合ガスをシリンダ内
に導く吸入口あるいは排気ガスを排出する排気口
を適時に開閉するようになつている。 Generally, the above-mentioned engine valve has a seat surface formed through a stem portion and a rounded portion continuous to the stem portion. The stem portion is slidably supported by a bearing portion formed in the cylinder head. This valve is linked to the movement of the piston, and uses its seat surface to open and close, in a timely manner, an intake port for introducing mixed gas into the cylinder or an exhaust port for discharging exhaust gas.
従来、上記エンジン用バルブは鍛造によつて形
成されたのち、第１図に示すようにステム部ａの
上記シリンダヘツドの軸受部によつて支持される
部分ｂだけを所定の精度に表面加工していた。そ
のため、上記バルブには、ステム部ａの表面加工
された部分ｂとされない部分ｃとの境界部に段差
ｄができるので、長期の使用によつてステム部ａ
はその段差ｄの個所から折損することがあるとい
う重大な事故を招く虞れがあつた。とくに、この
ような事故はステム部ａが高温の排気ガスの影響
を受ける排気バルブに発生しやすかつた。 Conventionally, the engine valve is formed by forging, and then only the portion b of the stem portion a that is supported by the bearing portion of the cylinder head is surface-processed to a predetermined precision, as shown in FIG. was. Therefore, in the above-mentioned valve, a step d is formed at the boundary between the surface-treated part b of the stem part a and the non-surface-treated part c.
could break at the step d, which could lead to a serious accident. In particular, such accidents tend to occur in exhaust valves whose stem portion a is affected by high-temperature exhaust gas.
そこで、バルブの表面加工をステム部だけに留
まらず、アール部まで行なうことが検討されてい
る。アール部を表面加工する手段としては、スパ
イラル研摩やシヨツトピーニングが考えられる
が、これらの加工手段は多大な手間が掛るばかり
か能率が悪いので、大幅なコストアツプを招くこ
とになる。 Therefore, it is being considered to process the surface of the valve not only on the stem portion but also on the rounded portion. Spiral polishing and shot peening are conceivable methods for surface-processing the rounded portion, but these processing methods not only require a great deal of effort but are inefficient, resulting in a significant increase in cost.
この発明は上記事情にもとづきなされたもの
で、その目的とするところは、ステム部だけでな
くアール部も能率よく容易に表面加工することが
できるようにして、コストアツプを招かずにバル
ブの疲労強度の向上を計るようにしたエンジン用
バルブの加工方法を提供することにある。 This invention was made based on the above-mentioned circumstances, and its purpose is to improve the fatigue strength of the valve by making it possible to efficiently and easily surface-process not only the stem part but also the rounded part, thereby increasing the fatigue strength of the valve without increasing the cost. An object of the present invention is to provide a method for processing engine valves that improves the performance of engine valves.
以下、この発明の一実施例を第２図と第３図を
参照して説明する。図中１は鍛造によつて形成さ
れたエンジン用のバルブである。このバルブ１は
ステム部２と、このステム部２の一端部に連続す
るアール部３を介して形成されたシート面４と、
このシート面４と連続して形成されたバルブヘツ
ド５とからなる。 An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In the figure, 1 is a valve for an engine formed by forging. This valve 1 includes a stem portion 2, a seat surface 4 formed via a rounded portion 3 continuous to one end of this stem portion 2,
It consists of a valve head 5 formed continuously with this seat surface 4.
このように鍛造されたバルブ１は、そのステム
部２とアール部３とが研摩加工装置６によつて研
摩加工される。すなわち、研摩加工装置６は回転
駆動されるチヤツク７と円盤状の砥石８を有す。
この砥石８は第２図に矢印で示す方向に送られる
ようになつていて、その送り方向の端部は上記ア
ール部３のステム部２側の一部分と対応する曲面
９に形成されている。上記バルブ１はそのステム
部２の他端がチヤツク７に保持され、このチヤツ
ク７によつて回転駆動される。 The valve 1 thus forged has its stem portion 2 and rounded portion 3 polished by a polishing device 6. That is, the polishing device 6 has a chuck 7 and a disk-shaped grindstone 8 which are rotationally driven.
This grindstone 8 is adapted to be fed in the direction shown by the arrow in FIG. 2, and its end in the feed direction is formed into a curved surface 9 corresponding to a portion of the rounded portion 3 on the stem portion 2 side. The other end of the stem portion 2 of the valve 1 is held by a chuck 7, and is rotationally driven by this chuck 7.
そして、バルブ１と砥石８とを回転駆動したの
ち、砥石８をステム部２の表面に当てて所定の切
込みを与えたのち、この砥石８を図中鎖線で示す
ようにその曲面９がアール部３の一部を研摩する
位置まで送る。これによつてバルブ１は、そのス
テム部２と、このステム部２に連続してアール部
３の表面の一部とが円周方向に研摩加工されるか
ら、上記ステム部２に従来のように段差が生じ、
ステム部２の疲労強度が低下することがないばか
りか、通常の円筒を研摩加工するときと同じよう
にしてアール部３の一部を研摩することができる
から、能率よく容易に行なえる。また、アール部
３の一部分だけを表面加工することによつて、こ
のアール部３に段差が生じるが、アール部３はス
テム部２に比べて大径であるから、ここに生じる
段差によつてバルブ１の疲労強度が低下するもの
でない。 After rotating the valve 1 and the grindstone 8, the grindstone 8 is applied to the surface of the stem portion 2 to make a predetermined cut. Send part of 3 to the position where it will be polished. As a result, in the valve 1, the stem portion 2 and a part of the surface of the rounded portion 3 continuous to the stem portion 2 are polished in the circumferential direction, so that the stem portion 2 is polished as in the conventional case. There is a difference in the
Not only does the fatigue strength of the stem portion 2 not deteriorate, but also a part of the rounded portion 3 can be polished in the same manner as when polishing a normal cylinder, so the polishing can be carried out efficiently and easily. Furthermore, by surface-processing only a portion of the radiused portion 3, a step is created in the radiused portion 3, but since the radiused portion 3 has a larger diameter than the stem portion 2, the step created here The fatigue strength of the valve 1 is not reduced.
以上述べたようにこの発明は、砥石をバルブの
ステム部の表面に当てて切込みを与え、そののち
同砥石を砥石の回転中心軸線に沿つて上記ステム
部と連続するアール部の位置まで送り、上記砥石
の上記送り方向の端部に形成された上記アール部
に対応する曲面形状によつて上記ステム部に連続
して上記アール部の表面を研磨加工するようにし
たから、上記ステム部に従来のように段差が生
じ、このステム部の疲労強度が低下するというこ
とがない。また、ステム部とアール部との表面を
円周方向に研摩加工するため、通常円筒を研摩す
る手段と同じ手段によつて上記アール部を能率よ
く容易に研摩することができる。 As described above, the present invention applies a grindstone to the surface of the stem portion of a valve to make a cut, and then sends the grindstone along the rotation center axis of the grindstone to the position of the rounded portion that is continuous with the stem portion. The curved surface shape corresponding to the rounded part formed at the end of the grinding wheel in the feeding direction allows the surface of the rounded part to be polished continuously to the stem part. The fatigue strength of this stem part does not decrease due to the difference in level as shown in the figure. Further, since the surfaces of the stem portion and the radiused portion are polished in the circumferential direction, the radiused portion can be efficiently and easily polished by the same means that normally polishes a cylinder.
第１図は従来のバルブの研摩状態を示す説明
図、第２図はこの発明の一実施例を示すバルブの
研摩方法の説明図、第３図は第２図−線に沿
う断面図である。
１…バルブ、２…ステム部、３…アール部、８
…砥石。
Fig. 1 is an explanatory diagram showing a conventional valve polishing state, Fig. 2 is an explanatory diagram of a valve polishing method showing an embodiment of the present invention, and Fig. 3 is a sectional view taken along the line of Fig. 2. . 1... Valve, 2... Stem part, 3... R part, 8
...Whetstone.
Claims (1)
および上記ステム部と上記シート部との間をつな
ぐように設けられ上記小径から上記大径まで湾曲
された断面形状を有するアール部からなるエンジ
ン用バルブと、同エンジン用バルブをアール部と
は反対側の端で挟持し上記エンジン用バルブをス
テム部の軸線まわりに回転せしめ得るチヤツク
と、上記ステム部の軸線と平行な回転中心軸を有
し上記ステム部と上記アール部との境界部分を含
み上記ステム部および上記アール部のそれぞれの
所望の領域の表面形状に倣つてそれぞれ直線状断
面部分と同直線状断面部分になめらかに連続する
曲線状断面部分とからなる研磨面を外周に形成さ
れ上記直線状断面部側の端が上記チヤツクに近く
なるように装置されて上記回転中心軸まわりに回
転駆動可能な円盤状の砥石とを備え、 上記エンジン用バルブを上記ステム部の軸線を
中心に回転駆動させ、上記砥石を上記回転中心軸
線で回転駆動させて、更に上記砥石を上記エンジ
ン用バルブに接近させ上記砥石の研磨面を上記ス
テム部のチヤツク近傍表面に当接せしめて切込み
を与え、その後上記砥石をステム部の表面に沿つ
て上記曲線状断面部分が上記アール部表面に当接
するまで送り上記ステム部から上記アール部にか
けて連続した表面が形成されるように研磨加工せ
しめることを特徴とするエンジン用バルブの加工
方法。[Scope of Claims] 1. A small-diameter cylindrical stem portion, a large-diameter seat portion, and a cross-sectional shape that is provided to connect the stem portion and the seat portion and is curved from the small diameter to the large diameter. An engine valve consisting of a rounded part, a chuck that holds the engine valve at the end opposite to the rounded part and can rotate the engine valve around the axis of the stem part, and a chuck that is parallel to the axis of the stem part. It has a rotation center axis and includes a boundary portion between the stem portion and the radiused portion, and is shaped into a linear cross-sectional portion and a colinear cross-sectional portion, respectively, following the surface shapes of desired areas of the stem portion and the radiused portion. A disc-shaped disk having a polishing surface formed on its outer periphery consisting of a smoothly continuous curved cross-section portion, the end of the linear cross-section side being close to the chuck, and capable of being rotated around the central axis of rotation. a grindstone, the engine valve is rotationally driven around the axis of the stem portion, the grindstone is rotationally driven about the rotation center axis, and the grindstone is brought close to the engine valve to polish the grindstone. The grinding wheel is brought into contact with the surface near the chuck of the stem portion to make a cut, and then the grindstone is fed along the surface of the stem portion until the curved cross section portion contacts the surface of the rounded portion from the stem portion to the surface of the rounded portion. A method for processing an engine valve, characterized by polishing the valve so that a continuous surface is formed throughout the entire length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21957582A JPS59110545A (en) | 1982-12-15 | 1982-12-15 | Machining method of valve for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21957582A JPS59110545A (en) | 1982-12-15 | 1982-12-15 | Machining method of valve for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59110545A JPS59110545A (en) | 1984-06-26 |
| JPH0418992B2 true JPH0418992B2 (en) | 1992-03-30 |
Family
ID=16737664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21957582A Granted JPS59110545A (en) | 1982-12-15 | 1982-12-15 | Machining method of valve for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59110545A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0295707A (en) * | 1988-09-30 | 1990-04-06 | Fuji Valve Co Ltd | Intake/discharge valve for internal combustion engine |
| CN102371529A (en) * | 2011-09-28 | 2012-03-14 | 安徽沃德气门制造有限公司 | Automatic valve grinding machine |
| CN102371530A (en) * | 2011-09-28 | 2012-03-14 | 安徽沃德气门制造有限公司 | Valve grinding machine |
| CN105057587B (en) * | 2015-08-13 | 2018-03-23 | 湖南省至科铸造有限责任公司 | A kind of abrasive disk casting pattern and its preparation technology for making abrasive disk |
| CN111774989B (en) * | 2020-07-16 | 2021-08-10 | 杭州力琪阀门有限公司 | Multi-angle grinding device is used in valve production |
-
1982
- 1982-12-15 JP JP21957582A patent/JPS59110545A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59110545A (en) | 1984-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR930006787B1 (en) | Roundness processing device of a slipper surface of a rocker arm | |
| US6302769B1 (en) | Method for chamfering a wafer | |
| US20040248502A1 (en) | Method and device for grinding central bearing positions on crankshafts | |
| US5899797A (en) | Method and apparatus for grinding cams with concave sides | |
| JP2003300133A5 (en) | ||
| JPH0418992B2 (en) | ||
| US6030277A (en) | High infeed rate method for grinding ceramic workpieces with silicon carbide grinding wheels | |
| US1991834A (en) | Method of grinding valve seats | |
| WO2007072879A1 (en) | Wheel truing device | |
| US3347219A (en) | Diamond dressing tool | |
| JP2001054846A (en) | Spherical surface working method and device thereof | |
| KR102267728B1 (en) | Wheel roller polishing device | |
| US6564456B2 (en) | Method of finishing a valve seat for ball valves, in particular for fuel injection valves in internal combustion engines | |
| US7169028B1 (en) | Flexible finishing shoe | |
| US4198790A (en) | Method for finishing spherical rollers | |
| JP2002079469A (en) | Grinding wheel | |
| JPH10202492A (en) | Processing method of sealing surface of casting and whetstone used in the method | |
| US2042759A (en) | Valve seat grinding machine | |
| JP3922610B2 (en) | Grinding wheel and grinding method | |
| JP4124012B2 (en) | Camshaft manufacturing method | |
| JPS6013767B2 (en) | Thread groove grinding method for internal threads | |
| JP2706987B2 (en) | Ceramic member having cylindrical portion and method of grinding the cylindrical portion | |
| CN110625526A (en) | Anti-crushing and adjustable ball positioning tooling for grinder | |
| RU2333093C1 (en) | Device for sequential diamond-abrasive and finishing-strengthening processing of partial spherical surfaces | |
| JP2966955B2 (en) | Grinding method and equipment |