JPS59110545A - Machining method of valve for engine - Google Patents

Machining method of valve for engine

Info

Publication number
JPS59110545A
JPS59110545A JP21957582A JP21957582A JPS59110545A JP S59110545 A JPS59110545 A JP S59110545A JP 21957582 A JP21957582 A JP 21957582A JP 21957582 A JP21957582 A JP 21957582A JP S59110545 A JPS59110545 A JP S59110545A
Authority
JP
Japan
Prior art keywords
valve
stem part
stem
stem portion
engine
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.)
Granted
Application number
JP21957582A
Other languages
Japanese (ja)
Other versions
JPH0418992B2 (en
Inventor
Koichi Itabashi
浩一 板橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP21957582A priority Critical patent/JPS59110545A/en
Publication of JPS59110545A publication Critical patent/JPS59110545A/en
Publication of JPH0418992B2 publication Critical patent/JPH0418992B2/ja
Granted legal-status Critical Current

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)

Abstract

PURPOSE:To efficiently and easily machine the surface of a stem part so as to improve its fatigue strength without causing any cost up, by constituting a grinder so that surfaces of the stem part and a part of the round area successive to said stem part of a valve for an engine are ground in the peripheral direction. CONSTITUTION:A stem part 2 and a round area 3 of a valve 1 formed by casting are ground by a grinder 6. Then after rotating the valve 1 and a grinding wheel 8 to be driven and arranging the wheel 8 to touch a surface of the stem part 2 to give a prescribed cut, this wheel 8, as shown by a chain line in the drawing, is fed to a position in which a curved face 9 of the wheel grinds a part of the round area 3. In this way, surfaces of the stem part 2 and a part of the round area 3 successive to said stem part 2 are ground in the peripheral direction of the valve 1, never causing any decrease in fatigue strength of the stem part 2 which may be generated by a step difference in said stem part 2 while also never causing any cost up.

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
ンジン用バルブの刀ｎ工方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing engine valves 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ッドに形成された軸受部に
摺動自在に支持され、上記アール部およびシート面はシ
リンター内に突出している。そして、このパルプはピス
トンの動きに連動し、そのシート面によって混合ガスを
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っている。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, and the rounded portion and seat surface protrude into the cylinder. The pulp moves in conjunction with the movement of the piston, and its sheet surface opens and closes the intake port for introducing the mixed gas into the cylinder or the exhaust port for discharging the exhaust gas in a timely manner.

従来、上記エンジン用バルブは鋳造によって形成された
のち、第１Ｎに示すようにステム部ａの上記シリンダヘ
ッドの軸受部によって支持される部分すだけを所定の精
度に表面加工していた。そのため、上記パルプには、ス
テム部ａの表面加工された部分すとされない部分Ｃとの
境界部に段差ｄができるので、長期の使用によってステ
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った。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
パルプに発生しやすかった。Conventionally, after the engine valve is formed by casting, only the portion of the stem portion a supported by the bearing portion of the cylinder head has been surface-processed to a predetermined precision, as shown in No. 1N. Therefore, in the above-mentioned pulp, a step d is formed at the boundary between the surface-treated portion C of the stem portion a and the untreated portion C, so that the stem portion a may break at the step d after long-term use. There was a risk of a serious accident. In particular, such accidents were likely to occur in exhaust pulp, where the stem portion a is affected by high-temperature exhaust gas.

そこで、パルプ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ョトピ
ーニングが考えられるが、これらの加工手段は多大な手
間が掛るばかシか能率が悪いので、大幅なコストアップ
を招くことになる。Therefore, the surface treatment of pulp is not limited to the stem part.
Consideration is being given to extending the training to the round section. Spiral polishing and short peening are conceivable methods for surface-processing the rounded portion, but these processing methods require a great deal of effort and 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
トアップを招かずにバルブの疲労強度の向上を計るよう
にしたエンジン用パルプの加工方法を提供することにあ
る。This invention was made based on the above circumstances, and its purpose is to make it possible to efficiently and easily process the surface of not only the stem part but also the rounded part, thereby reducing the fatigue of the valve without increasing costs. An object of the present invention is to provide a method for processing pulp for an engine so as to improve its strength.

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は鋳造によっ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
たパルプヘッド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 casting. This valve 1 consists of a stem portion 2, a seat surface 4 formed via a rounded portion 3 continuous to one end of this stem portion 2, and a pulp head 5 formed continuously with this seat surface 4. .

このように鋳造されたバルブ１は、そのステム部２とア
ール部３とが研摩加工装置６によって研摩加工される。The valve 1 thus cast has its stem portion 2 and rounded portion 3 polished by a polishing device 6.

すなわち、研摩加工装置６は回転駆動されるチャック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っていて、その送り方向の
端部は上記アール部３のステム部ｚ　ｆＩｉｌｌ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の他端がチャック７に保持され、このチ
ャック７によって回転駆動される。That is, the polishing device 6 has a chuck 7 that is rotationally driven.
and a disc-shaped grindstone 8. This grindstone 8 is fed in the direction indicated 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 stem portion zfIill of the rounded portion 3. The other end of the stem portion 2 of the valve 1 is held by a chuck 7, and is rotationally driven by the 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２０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。これによって
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シか、
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、能率よく容楊
に行なえる。また、アール部３の一部分だけを表面加工
することによって、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（でよってバルブ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 20 to make a predetermined cut. A part of the machine is sent 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 does not have a step as in the conventional case. occurs,
Is it foolish that the fatigue strength of the stem portion 2 does not decrease?
Since a part of the radiused portion 3 can be polished in the same manner as when polishing a normal cylinder, it can be done efficiently and smoothly. Also, 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 height difference created here (therefore, the valve The fatigue strength of No. 1 does not decrease.

なお、上記一実施例では、アール部３のステム部２と連
続する一部分だけを表面加工したが、アール部３の表面
全体を研摩加工してもよいこと無論である。この場合、
第４図に示すようにステム部２を第１の砥石１０によっ
て研摩したのち、アール部３をこのアール部３と対応す
る曲面１１を有した第２の砥石１２で研摩するようにす
ればよい。In the above-mentioned embodiment, only a portion of the radiused portion 3 that is continuous with the stem portion 2 is surface-processed, but it goes without saying that the entire surface of the radiused portion 3 may be polished. in this case,
As shown in FIG. 4, after the stem portion 2 is ground by a first grindstone 10, the radiused portion 3 may be ground by a second grindstone 12 having a curved surface 11 corresponding to this radiused portion 3. .

以上述べたようにこの発明は、ステム部と、アール部の
少なくとも上記ステム部に連続する一部分との表面を円
周方向に研摩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、と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っ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, in this invention, the surfaces of the stem portion and at least a portion of the rounded portion that is continuous with the stem portion are polished in the circumferential direction, so that there is no step in the stem portion as in the conventional case. This will not cause a decrease in the fatigue strength of the stem portion. 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.

【図面の簡単な説明】[Brief explanation of the drawing]

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１−１線に沿うｌ＠面図、第４図はこ
の発明の他の実施例を示す研摩方法の説明図である。 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 an illustration along the line 1-1 in Fig. 2. The top view and FIG. 4 are explanatory diagrams of a polishing method showing another embodiment of the present invention. 1...Valve, 2...Stem part, 3...Round part, 8...Whetstone.

Claims (1)

【特許請求の範囲】[Claims] 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パルプの表面を加工する方法におい
て、上記ステム部と、上記アール部の少なくとも上１己
ステム部と連続する一部分との表面を円周方向に１ミ厚
加工することを特徴とするエンジン用パルプの加工方法
。In a method of processing the surface of pulp in which a sheet surface is formed through a stem portion and a radiused portion continuous thereto, the surface of the stem portion and at least a portion of the upper radius portion continuous with the stem portion; A method for processing pulp for an engine, characterized by processing pulp to a thickness of 1 mm in the circumferential direction.
JP21957582A 1982-12-15 1982-12-15 Machining method of valve for engine Granted JPS59110545A (en)

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 true JPS59110545A (en) 1984-06-26
JPH0418992B2 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)

Cited By (5)

* Cited by examiner, † Cited by third party
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
CN105057587A (en) * 2015-08-13 2015-11-18 湖南省至科铸造有限责任公司 Grinding disc casting, grinding disc casting mold and grinding disc molding process
CN111774989A (en) * 2020-07-16 2020-10-16 杭州力琪阀门有限公司 Multi-angle grinding device is used in valve production

Cited By (5)

* Cited by examiner, † Cited by third party
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
CN105057587A (en) * 2015-08-13 2015-11-18 湖南省至科铸造有限责任公司 Grinding disc casting, grinding disc casting mold and grinding disc molding process
CN111774989A (en) * 2020-07-16 2020-10-16 杭州力琪阀门有限公司 Multi-angle grinding device is used in valve production

Also Published As

Publication number Publication date
JPH0418992B2 (en) 1992-03-30

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