JPH04209915A - Intake and exhaust valve for internal combustion engine and manufacture thereof - Google Patents
Intake and exhaust valve for internal combustion engine and manufacture thereofInfo
- Publication number
- JPH04209915A JPH04209915A JP40972390A JP40972390A JPH04209915A JP H04209915 A JPH04209915 A JP H04209915A JP 40972390 A JP40972390 A JP 40972390A JP 40972390 A JP40972390 A JP 40972390A JP H04209915 A JPH04209915 A JP H04209915A
- Authority
- JP
- Japan
- Prior art keywords
- stem
- cap member
- intake
- exhaust valve
- internal combustion
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract 5
- 239000000463 material Substances 0.000 claims description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910001347 Stellite Inorganic materials 0.000 description 2
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
Landscapes
- Forging (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
［０００１１ [00011
【産業上の利用分野］本発明は、例えば、弁体がチタン
又はチタン合金により成形された内燃機関用の吸排気弁
に係り、特に、ステムの端面の耐摩耗性を向上させた吸
排気弁及びその製造方法に関する。
［０００２］
【従来の技術】エンジンの許容回転数を高めるうえで最
も障害となるのは、動弁系の重量による慣性質量の増加
であり、動弁系の構成部品の総重量が大となると、その
慣性のために、高速回転になるほど、弁体のカムに対す
る追従性能が低下し、弁体がおどり等を発生して出力低
下を招く。
［０００３］このような観点から、弁体を鋼材（耐熱合
金鋼）に代えて、低比重でかつ耐熱性にも優れるチタン
又はチタン合金により製作し、弁体の一層の軽量化を図
る試みがなされている。
［０００４］[Industrial Field of Application] The present invention relates to an intake and exhaust valve for an internal combustion engine whose valve body is made of titanium or a titanium alloy, and particularly to an intake and exhaust valve with improved wear resistance on the end face of the stem. and its manufacturing method. [0002] [Prior Art] The biggest obstacle to increasing the allowable engine speed is the increase in inertial mass due to the weight of the valve train, and as the total weight of the components of the valve train becomes large, Due to its inertia, the higher the rotation speed, the lower the ability of the valve body to follow the cam, causing the valve body to dance or the like, resulting in a decrease in output. [0003] From this point of view, attempts have been made to manufacture the valve body from titanium or titanium alloy, which has low specific gravity and excellent heat resistance, instead of steel material (heat-resistant alloy steel), and to further reduce the weight of the valve body. being done. [0004]
【発明が解決しようとする課題】しかしながら、弁体を
チタン又はチタン合金により製作した吸排気弁において
は、チタン等の硬度がロックウェル硬さ（ＨＲＣ）で３
０〜４０程度と小さいため、常時弁開閉に伴う大きな繰
返し荷重が作用するステム端面の耐摩耗性が問題となる
。
［０００５］この問題点を解決するため、ステムの端面
にステライト等の耐摩耗性材料を肉盛りしたり、又は高
硬度の鋼材等をステムの端部に接合したりすることが行
われている。
［０００６］Ｌかし、ステライトは高価であるばかりで
なく、これを施工するための設備費も嵩み、かつ施工時
間も長いことから、製造コストを引き上げる結果となる
。
［０００７］またステムの端部に、耐摩耗性のある鋼材
等を溶接手段により接合すると、互いの組成や融点の違
い等により、熱変形や熱ひずみが発生する恐れがある。
［０００８１本発明は、上記課題に鑑みてなされたもの
で、その目的とするところは、溶接等の熱的な接合方法
によることなく、簡単な手段でステムの端面の耐摩耗性
を高めることを可能とし、もって、安価な内燃機関用吸
排気弁及びその製造方法を提供することにある。
［０００９］[Problems to be Solved by the Invention] However, in intake and exhaust valves whose valve bodies are made of titanium or titanium alloy, the hardness of titanium etc. is 3 on the Rockwell hardness (HRC).
Since the diameter is small, on the order of 0 to 40, the wear resistance of the stem end face, which is constantly subjected to large repeated loads due to opening and closing of the valve, becomes a problem. [0005] In order to solve this problem, it has been carried out to build up a wear-resistant material such as Stellite on the end surface of the stem, or to join a high-hardness steel material to the end of the stem. . [0006] L oak and stellite are not only expensive, but also require high equipment costs and long construction times, resulting in an increase in manufacturing costs. [0007] Furthermore, when a wear-resistant steel material or the like is joined to the end of the stem by welding means, thermal deformation or thermal strain may occur due to differences in mutual composition or melting point. [00081] The present invention has been made in view of the above problems, and its purpose is to increase the wear resistance of the end face of the stem by simple means without using a thermal joining method such as welding. An object of the present invention is to provide an intake/exhaust valve for an internal combustion engine that is possible and inexpensive, and a method for manufacturing the same. [0009]
【課題を解決するための手段】上記目的を達成するため
、本発明は、ステムの一端に傘部が連設された弁体より
なる内燃機関用吸排気弁において、前記ステムの他端部
に、弁体の材質よりも高硬度のキャップ部材を、ステム
の端面を覆うようにして嵌合するとともに、ステム端部
の外周面とキャップ部材の内周面とに形成した凹部内に
、抜け止め部材を設けたことを特徴（請求項１）として
いる。
［００１０１また、その製造方法は、ステムの一端に傘
部が連設され、かつステム端部の外周面に凹部を有する
弁体における前記ステムの端部に、開口部にステムの外
径よりも若干大径の大径部を有し、かつその奥部に外方
に向かって凹入する凹部を有するキャップ部材を嵌合し
たのち、ステムの外周面とキャップ部材の大径部の内周
面との間に筒状リングを圧入することにより、筒状リン
グを、前記凹部内に突入するように塑性変形させること
を特徴（請求項２）としている。
［００１１３[Means for Solving the Problems] In order to achieve the above object, the present invention provides an intake/exhaust valve for an internal combustion engine comprising a valve body in which an umbrella portion is connected to one end of the stem. A cap member that is harder than the material of the valve body is fitted so as to cover the end face of the stem, and a recess formed on the outer circumferential surface of the stem end and the inner circumferential face of the cap member to prevent it from coming off is fitted. A feature (claim 1) is that a member is provided. [00101 In addition, the method for manufacturing the valve body includes a valve body in which an umbrella portion is connected to one end of the stem and has a recess on the outer circumferential surface of the stem end, and the opening is larger than the outer diameter of the stem. After fitting a cap member that has a slightly larger diameter portion and a concave portion recessed outward in its deep portion, the outer circumferential surface of the stem and the inner circumferential surface of the large diameter portion of the cap member are fitted. The cylindrical ring is press-fitted between the cylindrical ring and the cylindrical ring, whereby the cylindrical ring is plastically deformed so as to protrude into the recess. [00113
【作用］ステム端部の外周面とキャップ部材の内周面と
に形成した凹部内に抜け止め部材を設けて、高硬度のキ
ャップ部材を取付けたので、接合部に互いの組成や融点
の違い等による熱変形や熱ひずみを発生させることなく
、吸排気弁のステム端面の耐摩耗性を向上させることが
できる（請求項１）。
［００１２］また、ステムの外周面とキャップ部材の内
周面とに形成された凹部内に、筒状リングを圧入し、そ
れを塑性変形させることにより、簡単に両者を接合でき
、ステムの端部に熱ひずみ等が発生するのを防止しうる
（請求項２）。
［００１３］
【実施例】以下、本発明の一実施例を、図面に基づいて
説明する。
（００１４１図１は、本発明の吸排気弁を示し、傘部（
１）とステム（２）からなる弁体（３）は、チタン又は
チタン合金により成形されている。
［００１５］ （４）は、ステム（２）の端部に形成さ
れたコツタ溝で、これには、図示しないバルブスプリン
グ係止用リテーナを保持するための１対のコック（５）
（５）が外嵌される。
［００１６］ステム（２）の軸端部には、チタン又はチ
タン合金よりも高硬度の材料、例えば焼入れ硬化された
鋼材等により成形した、有底円筒状をなすキャップ部材
（６）が、ステム（２）の上端面と環状凹溝（４）の上
部のステム周りとを覆うようにして嵌合されている。キ
ャップ部材（６）は、その内周面に形成された環状溝（
７）と、それと対向するステム（２）の外周面に形成さ
れた環状溝（８）との間に、リング状の抜け止め部材（
９）を嵌着することにより、抜け止めされている。
［００１７１次に、図２〜図４を参照して、キャップ部
材（６）の取付要領について説明する。
（００１８］まず、図２に示すように、キャップ部材（
６）の開口端部側に形成された、内径がステム（２）の
外径よりも若干大きい大径部（６ａ）に、内径がステム
（２）の外径とほぼ等しく、かつ外径が大径部（６ａ）
とほぼ等しい軟質金属よりなる筒状リング（９′）を予
め内嵌した状態で、キャップ部材（６）全体を、ステム
（２）の上端部に嵌合する。上記軟質金属としては、常
温で塑性変形可能な材料、例えば軟鋼、銅、アルミニウ
ム、鉛等が好ましい。
［００１９１ついで、図３に示すように、半割筒状の１
対の押込治具（１０） （１０）の上部を、ステム（２
）とキャップ部材（６）の大径部（６ａ）との間の隙間
より挿入して、筒状リング（９′）を、その上端がキャ
ップ部材（６）側の環状溝（７）の上部に当接するまで
押し込む。
［００２０１この際、適宜の押さえ板（１１）によりキ
ャップ部材（６）の上端面を押さえ、キャップ部材（６
）の上方への移動を阻止する。
［００２１１ついで、図４に示すように、両押込治具（
１０）をさらに上方へ強圧すれば、筒状リング（９′）
が塑性変形させられて、ステム（２）及びキャップ部材
（６）のそれぞれの環状溝（８）（７）内に圧入される
ことから、キャップ部材（６）の抜け止めが図れ、ステ
ム（２）の端部に強固に固着される。
［００２２］以上のように製作された吸排気弁において
は、図１に示すように、ロッカーアーム（１２） （直
接駆動式の動弁機構にあってはタペット）と摺接するス
テム端面の耐摩耗性が向上するのは勿論のこと、ステム
端部がキャップ部材（６）により補強されるので、弁開
閉に伴うな大きな繰返し荷重に対しても高い剛性を有し
、変形等の生じる恐れがない。
［００２３］また、一般的な材料よりなるキャップ部材
（６）を、溶接等の熱的な結合手段によらず、全て常温
下における機械的手段により固着しているので、ステム
（２）の端部に熱ひずみ等の発生することがなく、しか
も安価に製造しつる。
［００２４］なお、実施例では、ステム（２）を中実材
として説明したが、弁体（３）における傘部（１）から
ステム（２）の適所までに至る中心軸線上に、中空孔を
穿設してなる中空弁、あるいは中空孔内に金属ナトリウ
ム等の冷却媒体が封入された中空弁にも適用しつる。
［００２５］弁体（３）の材料は、上記チタン又はチタ
ン合金以外に、アルミニウム合金等やその他の低比重材
料であってもよい。
［００２６］キャップ部材の材料は、ｃｏ基、Ｎｉ基、
Ｆｅ基をベースとした合金鋼、セラミックス、超高分子
量ポリエチレン等の耐摩耗性プラスチック等であっても
よい。
［００２７］実施例では、環状溝（７）及び（８）を連
続したものとしであるが、要所要所に断続的に形成して
もよく、また、それら環状溝（７）（８）同士を互いに
対向させずに、上下方向にずらしてもよい。
［００２８］[Function] A retaining member is provided in the recess formed on the outer circumferential surface of the stem end and the inner circumferential surface of the cap member, and the high hardness cap member is attached, so that the joints have different compositions and melting points. The wear resistance of the stem end face of the intake and exhaust valve can be improved without causing thermal deformation or thermal strain due to the above (Claim 1). [0012] Furthermore, by press-fitting the cylindrical ring into the recess formed in the outer circumferential surface of the stem and the inner circumferential surface of the cap member and plastically deforming it, the two can be easily joined, and the end of the stem can be easily joined. (claim 2). [0013] [0013] Hereinafter, one embodiment of the present invention will be described based on the drawings. (00141 FIG. 1 shows the intake and exhaust valve of the present invention, and the umbrella part (
1) and a stem (2), the valve body (3) is molded from titanium or a titanium alloy. [0015] (4) is a groove formed at the end of the stem (2), which includes a pair of cocks (5) for holding a valve spring locking retainer (not shown).
(5) is fitted externally. [0016] At the shaft end of the stem (2), a cap member (6) in the shape of a cylinder with a bottom is formed of a material harder than titanium or titanium alloy, such as quench-hardened steel. It is fitted so as to cover the upper end surface of (2) and the circumference of the stem at the upper part of the annular groove (4). The cap member (6) has an annular groove (
A ring-shaped retaining member (
9), it is prevented from coming off. [00171] Next, the procedure for attaching the cap member (6) will be explained with reference to FIGS. 2 to 4. (0018) First, as shown in FIG.
6), the large diameter part (6a) having an inner diameter slightly larger than the outer diameter of the stem (2) has an inner diameter approximately equal to the outer diameter of the stem (2), and an outer diameter of the stem (2). Large diameter part (6a)
The entire cap member (6) is fitted onto the upper end portion of the stem (2), with a cylindrical ring (9') made of a soft metal approximately equal to the above being previously fitted therein. The soft metal is preferably a material that can be plastically deformed at room temperature, such as mild steel, copper, aluminum, or lead. [00191 Next, as shown in FIG.
The upper part of the pair of pushing jigs (10) (10) is attached to the stem (2).
) and the large diameter part (6a) of the cap member (6), and insert the cylindrical ring (9') so that its upper end is at the top of the annular groove (7) on the cap member (6) side. Push in until it touches the [00201 At this time, press the upper end surface of the cap member (6) with an appropriate presser plate (11),
) to prevent upward movement. [00211 Next, as shown in FIG.
If 10) is further pressed upward, the cylindrical ring (9')
is plastically deformed and press-fitted into the respective annular grooves (8) and (7) of the stem (2) and the cap member (6), so that the cap member (6) is prevented from coming off and the stem (2) ) is firmly attached to the end of the [0022] In the intake and exhaust valve manufactured as described above, as shown in FIG. Not only does this improve durability, but since the stem end is reinforced by the cap member (6), it has high rigidity even against the large repeated loads associated with opening and closing the valve, and there is no risk of deformation. . [0023] Furthermore, since the cap member (6) made of a general material is fixed by mechanical means at room temperature without using thermal bonding means such as welding, the end of the stem (2) No thermal strain occurs in the parts, and it can be manufactured at low cost. [0024] In the embodiment, the stem (2) is described as a solid material, but a hollow hole is formed on the central axis of the valve body (3) from the umbrella part (1) to the appropriate position of the stem (2). It can also be applied to hollow valves with a hollow hole or a cooling medium such as metallic sodium sealed in the hollow hole. [0025] The material of the valve body (3) may be an aluminum alloy or other low specific gravity material in addition to the above-mentioned titanium or titanium alloy. [0026] The material of the cap member is co-based, Ni-based,
It may also be made of Fe-based alloy steel, ceramics, wear-resistant plastics such as ultra-high molecular weight polyethylene, and the like. [0027] In the embodiment, the annular grooves (7) and (8) are continuous, but they may be formed intermittently at important points, or the annular grooves (7) and (8) may be formed intermittently at key points. They may be shifted in the vertical direction instead of facing each other. [0028]
【発明の効果】本発明によれば、ステムの端部に、高硬
度のキャップ部材を、互いの間隙より圧入した筒状リン
グを塑性変形させて嵌着するだけの簡単な手段で、ステ
ム端面の耐摩耗性を高めることができるので、安価な吸
排気弁を提供しうる。
［００２９］また、ステムとキャップ部材とを、熱的な
結合手段を使用することなく互いに結合しつるので、ス
テム端部に熱ひずみ等が発生する恐れはない。According to the present invention, a high-hardness cap member is fitted to the end of the stem by a simple method of plastically deforming the cylindrical ring press-fitted through the gap between them. Since the wear resistance of the valve can be improved, an inexpensive intake and exhaust valve can be provided. [0029] Furthermore, since the stem and the cap member are coupled to each other without using any thermal coupling means, there is no risk of thermal strain or the like occurring at the end of the stem.
【図１】本発明の吸排気弁の一実施例を示す一部切欠正
面図である。FIG. 1 is a partially cutaway front view showing an embodiment of the intake and exhaust valve of the present invention.
【図２】本発明の製造要領を示し、キャップ部材と筒状
リングとをステムに嵌合した状態の要部の中央縦断正面
図である。 ＼
FIG. 2 is a central vertical cross-sectional front view of the main parts in a state where the cap member and the cylindrical ring are fitted to the stem, showing the manufacturing procedure of the present invention. \
【図３】同じく、筒状リングを環状溝内に押し込 だと
きの初期の状態を示す要部の中央縦断正面図であ[Fig. 3] Similarly, it is a central longitudinal sectional front view of the main part showing the initial state when the cylindrical ring is pushed into the annular groove.
【図４
】同じく、筒状リングをステムとキャップ との環状
溝内に圧入して、塑性変形させた状態を示す要部の中央
縦断正面図である。[Figure 4
] Similarly, it is a central vertical sectional front view of the main part showing a state in which the cylindrical ring is press-fitted into the annular groove of the stem and the cap and is plastically deformed.
（１）傘部 （２）ステム（３）弁体
（４）コツタ溝（５）コック
（６）キャップ部材（６ａ）大径部
（７）（８）環状溝（凹部）（９）抜け止め部
材 （９ａ）筒状リング（１０）押込治具
（１１）押え板（１２）ロッカーアーム(1) Umbrella (2) Stem (3) Valve body (4) Kotta groove (5) Cock
(6) Cap member (6a) large diameter part
(7) (8) Annular groove (recess) (9) Retaining member (9a) Cylindrical ring (10) Pushing jig
(11) Holding plate (12) Rocker arm
【図１】[Figure 1]
Claims (2)
なる内燃機関用吸排気弁において、前記ステムの他端部
に、弁体の材質よりも高硬度のキャップ部材を、ステム
の端面を覆うようにして嵌合するとともに、ステム端部
の外周面とキャップ部材の内周面とに形成した凹部内に
、抜け止め部材を設けたことを特徴とする内燃機関用吸
排気弁。1. An intake/exhaust valve for an internal combustion engine comprising a valve body with a cap connected to one end of the stem, wherein a cap member having a harder material than the material of the valve body is provided at the other end of the stem. An intake/exhaust valve for an internal combustion engine, characterized in that the intake and exhaust valve for an internal combustion engine is fitted so as to cover the end face of the stem, and a retaining member is provided in a recess formed in the outer circumferential surface of the stem end and the inner circumferential surface of the cap member. .
ム端部の外周面に凹部を有する弁体における前記ステム
の端部に、開口部にステムの外径よりも若干大径の大径
部を有し、かつその奥部に外方に向かって押入する凹部
を有するキャップ部材を嵌合したのち、ステムの外周面
とキャップ部材の大径部の内周面との間に筒状リングを
圧入することにより、筒状リングを、前記凹部内に突入
するように塑性変形させることを特徴とする内燃機関用
吸排気弁の製造方法。2. A valve body having an umbrella part connected to one end of the stem and having a recess on the outer peripheral surface of the stem end, the end of the stem having an opening with a diameter slightly larger than the outer diameter of the stem. After fitting a cap member that has a large diameter part and a recess that is pushed outward into the deep part of the cap member, a cylinder is formed between the outer peripheral surface of the stem and the inner peripheral surface of the large diameter part of the cap member. 1. A method of manufacturing an intake and exhaust valve for an internal combustion engine, characterized in that the cylindrical ring is plastically deformed so as to protrude into the recess by press-fitting the cylindrical ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40972390A JPH04209915A (en) | 1990-12-11 | 1990-12-11 | Intake and exhaust valve for internal combustion engine and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40972390A JPH04209915A (en) | 1990-12-11 | 1990-12-11 | Intake and exhaust valve for internal combustion engine and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04209915A true JPH04209915A (en) | 1992-07-31 |
Family
ID=18519017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40972390A Pending JPH04209915A (en) | 1990-12-11 | 1990-12-11 | Intake and exhaust valve for internal combustion engine and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04209915A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007205531A (en) * | 2006-02-06 | 2007-08-16 | Ckd Corp | Coolant valve |
| JP2020104132A (en) * | 2018-12-26 | 2020-07-09 | 日東精工株式会社 | Joining method of a plurality of members and joining structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6352907B2 (en) * | 1984-09-11 | 1988-10-20 | Kogyo Gijutsuin | |
| JPH02169143A (en) * | 1988-09-02 | 1990-06-29 | Yamaha Motor Co Ltd | Metal joining parts and production thereof |
-
1990
- 1990-12-11 JP JP40972390A patent/JPH04209915A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6352907B2 (en) * | 1984-09-11 | 1988-10-20 | Kogyo Gijutsuin | |
| JPH02169143A (en) * | 1988-09-02 | 1990-06-29 | Yamaha Motor Co Ltd | Metal joining parts and production thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007205531A (en) * | 2006-02-06 | 2007-08-16 | Ckd Corp | Coolant valve |
| JP4528729B2 (en) * | 2006-02-06 | 2010-08-18 | シーケーディ株式会社 | Coolant valve |
| JP2020104132A (en) * | 2018-12-26 | 2020-07-09 | 日東精工株式会社 | Joining method of a plurality of members and joining structure |
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