JPS62199912A - Rocker arm casted with core metal and manufacture thereof - Google Patents
Rocker arm casted with core metal and manufacture thereofInfo
- Publication number
- JPS62199912A JPS62199912A JP4326686A JP4326686A JPS62199912A JP S62199912 A JPS62199912 A JP S62199912A JP 4326686 A JP4326686 A JP 4326686A JP 4326686 A JP4326686 A JP 4326686A JP S62199912 A JPS62199912 A JP S62199912A
- Authority
- JP
- Japan
- Prior art keywords
- rocker arm
- core metal
- aluminum
- light alloy
- section
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 238000005266 casting Methods 0.000 claims abstract description 10
- 229910001234 light alloy Inorganic materials 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 32
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 10
- 238000007747 plating Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001208 Crucible steel Inorganic materials 0.000 claims 3
- 238000007598 dipping method Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 6
- 230000037431 insertion Effects 0.000 abstract description 6
- 230000005484 gravity Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はエンジンのロッカアームおよびその製造方法に
係り、特に芯金を鋼板で形成し、これを軽合金材を鋳込
みしてなる軽量のロッカアームとその製造方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an engine rocker arm and a method for manufacturing the same, and more particularly to a lightweight rocker arm in which a core metal is formed of a steel plate and a light alloy material is cast into the core metal, and the manufacturing thereof. It is about the method.
従来の技術
エンジンに使用されるロッカアームＩＡは第１Ｏ図に示
す如きものが一般に採用される。すなわちロッカアーム
ＩＡはロッカシャフト（図示せず）に枢支される貫通孔
３Ａ、この両側に形成されアジャステングスクリュ（図
示せず）を介してブツシュロッド（図示せず）と係合す
る一端部９、エンジンバルブ（図示せず）に当接してこ
れを開閉する他端部１０等とから形成される。ロッカ７
−ムＩＡには前記エンジンバルブを開閉するための押圧
力が作用するため高剛性に形成され、従来一般に鋳鉄に
よる鋳造品又は１２素鋼等にょる鍛造品等から図示の如
き一体的レバー構造に形成されていた。A rocker arm IA used in a conventional engine is generally as shown in FIG. 1O. That is, the rocker arm IA includes a through hole 3A that is pivotally supported by a rocker shaft (not shown), one end portion 9 that is formed on both sides of the through hole 3A, and engages with a bushing rod (not shown) via an adjusting screw (not shown). The other end portion 10 contacts an engine valve (not shown) to open and close it. rocker 7
- The lever IA is formed with high rigidity because the pressing force for opening and closing the engine valve acts on it, and conventionally, it is generally made from a cast product made of cast iron or a forged product made of 12 steel, etc., into an integral lever structure as shown in the figure. was being formed.
発７１１が解決しようとする問題点
エンジンの出力内上等のため軽量化の要請は高く、ロー
、カアームについても前記の如く高剛性に形成される必
要はあるが、すべての部分に必ずしも剛性を必要としな
い。Problems that the 711 is trying to solve There is a strong demand for weight reduction due to the increase in engine output, and the low and rear arms also need to be formed with high rigidity as mentioned above, but it is not necessary to have rigidity in all parts. do not need.
本発明は以上の要請と観点に基づき創案されたもので、
ロッカアームの重吐を低減すると共に、必要とする剛性
を保持し得るようにした芯金鋳ぐるみロッカアームを提
供し、更に該ロッカアームを製造する効果的方法につい
て提供するものである。The present invention was created based on the above requirements and viewpoints,
The object of the present invention is to provide a rocker arm made of a cored metal casting that can reduce heavy discharge of the rocker arm and maintain the necessary rigidity, and also to provide an effective method for manufacturing the rocker arm.
問題点を解決するための手段
本発明はこのために剛性を要する部分を鋼鉄材で形成し
、芯金とすると共に、該芯金を比重の軽い軽合金材で被
包して所定形状に形成される芯金持ぐるみロッカアーム
を構成するものであり、更に該ロッカアームを容易に、
かつ歩留りよく形成し得る製造方法を開示するものであ
る。Means for Solving the Problems The present invention, for this purpose, forms the parts that require rigidity from steel and uses them as a core metal, and then covers the core metal with a light alloy material with a light specific gravity to form a predetermined shape. The core metal handle constitutes the rocker arm, and furthermore, the rocker arm can be easily
The present invention also discloses a manufacturing method that can be formed with high yield.
実施例 以下、本発明の実施例を図面に基づき説明する。Example Embodiments of the present invention will be described below based on the drawings.
第１図および第２図に本実施例のロッカアーム１の全体
形状を示す。1 and 2 show the overall shape of the rocker arm 1 of this embodiment.
芯金２は第３図にも示す如くレバー形状に形成され、中
央部にロッカシャフト（図示せず）の挿入される貫通孔
３が穿設され、一端側にはアジャステングスクリュ（図
示せず）が挿設されるべき挿通孔４を有するボス部５が
膨起して形成される。また他端側にはエンジンバルブ（
図示せず）が当接する当接座部６が形成される。ボス部
５゜当接座部６は板部材７により一体的に連結され、例
えばｔｎ造および溶接等により形成される。またこれ等
は剛性を必要とすることから鋼鉄材で形成される。なお
ほぼ同一形状の芯金２を鋳造により形成しても勿論よい
。The core metal 2 is formed into a lever shape as shown in FIG. ) is formed by swelling a boss portion 5 having an insertion hole 4 into which the hole 4 is to be inserted. Also, on the other end side is the engine valve (
A contact seat portion 6 is formed on which a contact member (not shown) contacts. The boss portion 5° and the abutting seat portion 6 are integrally connected by a plate member 7, and are formed by, for example, TN construction or welding. In addition, since these require rigidity, they are made of steel. Of course, the core metal 2 having substantially the same shape may be formed by casting.
以上の如き芯金２を芯部とし第１図および第２図に示す
如く、アルミニウム又はアルミニウム合金によりこれを
被包し、所定形状のロッカアーム１を鋳造成形する。鋳
造成形においてアルミニウム等で特に被包されない部分
は当接座部６．１′を通孔３．挿通孔４等であり、板部
材７やロッカシャフト（図示せず）が挿入されるロッカ
アームポス？Ｂ８．ボス部５まわり等はアルミニウム等
で被包され所定形状に形成される。なお板部材７および
ボス部５は比較的樋内のアルミニウム被覆で勿論構わな
いが外観美等も考慮して適宜の形状に形成されるのが９
ましい、勿論アルミニウム等の被覆を特に必要としない
部分にもＱＩＩ９のアルミニウム等が付着しても構わな
い。The core metal 2 as described above is used as a core, and as shown in FIGS. 1 and 2, it is covered with aluminum or an aluminum alloy, and a rocker arm 1 having a predetermined shape is formed by casting. Parts that are not particularly covered with aluminum or the like during casting are provided with through holes 3. A rocker arm post, which is an insertion hole 4, etc., into which a plate member 7 and a rocker shaft (not shown) are inserted. B8. The area around the boss portion 5 is covered with aluminum or the like and formed into a predetermined shape. Of course, the plate member 7 and the boss part 5 may be covered with aluminum inside the gutter, but it is preferable to form them into an appropriate shape in consideration of external appearance etc.
Of course, QII9 aluminum or the like may be attached to parts that do not particularly require coating with aluminum or the like.
以上の如く外見上はアルミニウム等の材料で形成される
が、剛性を要する部分が芯金２により形成されるのが本
実施例のロッカアーム１の特長である。As described above, the rocker arm 1 of the present embodiment is characterized in that the portion requiring rigidity is formed of the core bar 2, although the rocker arm 1 is outwardly made of a material such as aluminum.
アルミニウム等の鋳ぐるみ後、ロッカアームｌは正規寸
法に加工仕上げされて製品とされる。After being cast with aluminum or the like, the rocker arm l is processed and finished to regular dimensions to become a product.
アルミニウム材の比重は約２．７で鋼鉄材、３分の１に
あたり、かつアルミニウム材がロッカアーム１の全容積
の大部分を占めるため極めて低重脣に形成される。また
前記の如く剛性を要する部分が鋼鉄材の芯金２で形成さ
れるため負荷される力に十分に抵抗することができる。The specific gravity of the aluminum material is about 2.7, which is one-third that of the steel material, and since the aluminum material occupies most of the total volume of the rocker arm 1, it is formed to have an extremely low weight. Further, as mentioned above, since the parts requiring rigidity are formed of the core metal 2 made of steel, it can sufficiently resist the applied force.
第４図および第６図は芯金２の他の形状を例示するもの
であるが、芯金２の構造はこれ等図示のものに限定しな
い。Although FIGS. 4 and 6 illustrate other shapes of the core metal 2, the structure of the core metal 2 is not limited to those shown.
第４図の芯金２Ａはｉ３図のボス部５に相当する部分を
板部材７Ａの一端部を湾曲形成せしめて挿通孔４Ａを形
成したものである。また当接座部６Ａも板部材７Ａを屈
折面したものから形成し、溶接等を省いている。第５図
は第３図と第４図の端部形状を合体したもので１貫通孔
３に相当するものが穿設されていない芯金２Ｂを表示す
る。この芯金２Ｂの場合には鋳ぐるみ成形後に貫通孔３
が同時加工形成される。第６図の芯金２Ｃは第４図に示
す芯金２Ａの貫通孔３を除去したもので第５図のものと
同様に鋳ぐるみ後に貫通孔３が同時加工される。The core metal 2A shown in FIG. 4 has an insertion hole 4A formed by bending one end of the plate member 7A at a portion corresponding to the boss portion 5 shown in FIG. i3. Further, the abutment seat portion 6A is also formed from the plate member 7A with a bent surface, and welding and the like are omitted. FIG. 5 is a combination of the end shapes of FIGS. 3 and 4, and shows a core bar 2B in which a hole corresponding to one through hole 3 is not drilled. In the case of this core metal 2B, the through hole 3 is
are processed and formed simultaneously. The core metal 2C shown in FIG. 6 is obtained by removing the through hole 3 of the core metal 2A shown in FIG. 4, and the through hole 3 is simultaneously machined after casting, similar to the core metal 2C shown in FIG. 5.
第７ｒｇＪないし第９図は以上の構造の口７カアームｌ
を鋳ぐるみ成形する製造方法の一例を示すものである０
本実施例では第３図に示す芯金２を使用して第２図に示
す如きロッカアーム１を鋳ぐるみ成形する方法を示して
いるが勿論芯金２および形成されるロッカアームｌは図
示のものに限定するものでない。7rgJ to 9th figure are the mouth 7ka arm l of the above structure.
This shows an example of a manufacturing method of casting-molding 0.
This embodiment shows a method of casting the rocker arm 1 shown in FIG. 2 using the core metal 2 shown in FIG. It is not limited.
第７５！Ｊに示す如く、第３図に示した芯金２が鋼材で
形成される。ボス部５は鍛造形成可使であるが、当接座
部６は板部材７と溶接結合するものであってもよい。75th! As shown in J, the core bar 2 shown in FIG. 3 is made of steel. The boss portion 5 can be formed by forging, but the abutting seat portion 6 may be welded to the plate member 7.
次に、第８図に示す如く前記芯金２の表面に溶融アルミ
ニウムめっきを施しアルミニウム層８を形成する。溶融
アルミニウムめっきはアルミニウムの溶湯の中に芯金２
を入れアルミニウムを表面に付着させるめっき方法で一
般に採用されている技術である。溶融アルミニウムめっ
きは鋼鉄材とこれを鋳ぐるみするアルミニウムの結合を
確実にするためのものである０本実施例では貫通孔３、
挿通孔２．当接座部６等にアルミニウム層８が付着して
いないように表示しているが、勿論付着してもよい、付
着を積極的に嫌う場合にはめっき防止処理をその部分に
施せばよい、なお本実施例では溶融アルミニウムめっき
を採用したが鋳ぐるみすべき材質によりこれ等に対応す
る溶融めっき材が適用されることは勿論である。Next, as shown in FIG. 8, the surface of the core metal 2 is subjected to hot-dip aluminum plating to form an aluminum layer 8. Hot-dip aluminum plating involves inserting two core metals into molten aluminum.
This is a commonly used plating method that attaches aluminum to the surface. Hot-dip aluminum plating is to ensure the bond between the steel material and the aluminum that is cast around it. In this example, the through holes 3,
Insertion hole 2. Although it is shown that the aluminum layer 8 is not attached to the abutting seat portion 6, etc., it is of course possible that the aluminum layer 8 is attached to the abutting seat portion 6, etc., but if you actively dislike attachment, you can apply a plating prevention treatment to that part. Although hot-dip aluminum plating was used in this embodiment, it goes without saying that a hot-dip plating material corresponding to the material to be cast may be used.
次に、第９図に示す如く、溶融アルミニウムめっきした
芯金２をロッカアームｌのアルミニウム鋳型内に中子の
如く配設し、アルミニウムを鋳湯し、芯金２を溶融アル
ミニウムめっきを介して鋳ぐるみし所定形状のロッカア
ームｌを形成する。この際アルミニウム鋳湯によりアル
ミニウム層８は溶け、鋼鉄材とアルミニウム材とが一体
的に結合する。Next, as shown in FIG. 9, the core metal 2 coated with hot-dip aluminum is placed in the aluminum mold of the rocker arm l like a core, aluminum is cast, and the core metal 2 is cast through the hot-dip aluminum plating. A rocker arm l having a predetermined shape is formed. At this time, the aluminum layer 8 is melted by the aluminum casting metal, and the steel material and the aluminum material are integrally bonded.
第４図およびｔ５６図に示す如き芯金２Ａ。Core metal 2A as shown in FIG. 4 and t56.
２Ｂ、２Ｃに対しても前記と同様の工程によりロッカア
ームｌが１．？を成形される。For 2B and 2C, the rocker arm l is changed to 1.2 by the same process as above. ? is molded.
本実施例によれば前記の如く芯金２と鋳ぐるみされるア
ルミニウムとが確実に結合し、安定品質のロッカアーム
１が得られ、歩留りも向上し得ると共に、貫通の鋳造法
により製品が得られるため安価、かつ容易に形成するこ
とができる。According to this embodiment, as described above, the core metal 2 and the cast aluminum are reliably bonded, the rocker arm 1 of stable quality can be obtained, the yield can be improved, and the product can be obtained by the through-casting method. Therefore, it is inexpensive and can be formed easily.
発明の効果
以上の説明によって明らかな如く、本発明によれば軽重
量のロッカアームが容易に、かつ歩留よく形成されると
共に、十分な剛性を確保することができる。Effects of the Invention As is clear from the above description, according to the present invention, a light rocker arm can be easily formed with a high yield, and sufficient rigidity can be ensured.
第１図は本発明一実施例の側面図、第２図は第１図の平
面図、第３ｖ！Ｊは実施例に使用される芯金の斜視図、
第４図ないし第６図は其の他の芯金の形状を示す斜視図
、第７図ないし第９図は実施例のロッカアームの製造方
法を説明するための平面図、第１０図は従来のロッカア
ームの斜視図である。
１、ＩＡ・・・ロッカアーム、２，２Ａ。
２Ｂ、２Ｃ−−−芯金、３，３Ａ−−−貫通孔、４．４
Ａ・・拳挿通孔、５・・・ポス部、６゜６Ａ−・ｇ当接
座部、７，７Ａ・・・板部材、８・−・アルミニウム層
９ ａ ＊・一端部、１０・・・他端部。
第７図
第８ｖｌＩ
第９図Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3v! J is a perspective view of the core metal used in the example,
Figures 4 to 6 are perspective views showing other shapes of the core metal, Figures 7 to 9 are plan views for explaining the method of manufacturing the rocker arm of the embodiment, and Figure 10 is the conventional one. It is a perspective view of a rocker arm. 1, IA...rocker arm, 2, 2A. 2B, 2C--- Core metal, 3, 3A--- Through hole, 4.4
A...Fist insertion hole, 5...Post part, 6゜6A--g abutting seat part, 7,7A...Plate member, 8...Aluminum layer 9a*-One end, 10...・Other end. Figure 7 Figure 8vlI Figure 9
Claims (1)
共に該芯金を軽合金材で鋳ぐるみして所定形状に形成す
ることを特徴とする鋼板鋳ぐるみロッカアーム。 ２、前記軽合金がアルミニウム又はアルミニウム合金で
あることを特徴とする特許請求の範囲第１項に記載の鋼
板鋳ぐるみロッカアーム。 ３、剛性を要する部を鋼鉄材で芯金として形成し、該芯
金の表面に溶融めっきをした後、これ等を軽合金で鋳ぐ
るみして所定形状のロッカ アームを形成することを特徴とする鋼板鋳ぐるみロッカ
アームの製造方法。 ４、前記軽合金材がアルミニウム又はアルミニウム合金
であると共に、前記溶融めっきが溶融アルミめっきであ
ることを特徴とする特許請求の範囲第３項に記載の鋼板
鋳ぐるみロッカアームの製造方法。[Scope of Claims] 1. A rocker arm made of a cast steel plate, characterized in that a portion requiring rigidity is formed of a steel material as a core metal, and the core metal is cast with a light alloy material to form a predetermined shape. 2. The steel plate cast rocker arm according to claim 1, wherein the light alloy is aluminum or an aluminum alloy. 3. A rocker arm of a predetermined shape is formed by forming a part requiring rigidity as a core metal from steel, hot-dipping the surface of the core metal, and then casting the core metal with a light alloy. A method of manufacturing a rocker arm made of cast steel plate. 4. The method for manufacturing a rocker arm made of a cast steel plate according to claim 3, wherein the light alloy material is aluminum or an aluminum alloy, and the hot-dip plating is hot-dip aluminum plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4326686A JPS62199912A (en) | 1986-02-28 | 1986-02-28 | Rocker arm casted with core metal and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4326686A JPS62199912A (en) | 1986-02-28 | 1986-02-28 | Rocker arm casted with core metal and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62199912A true JPS62199912A (en) | 1987-09-03 |
Family
ID=12659036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4326686A Pending JPS62199912A (en) | 1986-02-28 | 1986-02-28 | Rocker arm casted with core metal and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62199912A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58218335A (en) * | 1982-06-15 | 1983-12-19 | Nissan Motor Co Ltd | Manufacture of cam shaft |
-
1986
- 1986-02-28 JP JP4326686A patent/JPS62199912A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58218335A (en) * | 1982-06-15 | 1983-12-19 | Nissan Motor Co Ltd | Manufacture of cam shaft |
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