JPH07195167A - Cam shaft and its manufacture - Google Patents

Cam shaft and its manufacture

Info

Publication number
JPH07195167A
JPH07195167A JP35276493A JP35276493A JPH07195167A JP H07195167 A JPH07195167 A JP H07195167A JP 35276493 A JP35276493 A JP 35276493A JP 35276493 A JP35276493 A JP 35276493A JP H07195167 A JPH07195167 A JP H07195167A
Authority
JP
Japan
Prior art keywords
cam
mold
camshaft
cam lobe
model
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
JP35276493A
Other languages
Japanese (ja)
Other versions
JP3122298B2 (en
Inventor
Tamotsu Ikeda
保 池田
Haruo Iizuka
春雄 飯塚
Tsutomu Saka
勉 坂
Akira Fujiwara
昭 藤原
Noriyuki Yamada
範之 山田
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.)
Honda Motor Co Ltd
Riken Corp
Original Assignee
Honda Motor Co Ltd
Riken 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 Honda Motor Co Ltd, Riken Corp filed Critical Honda Motor Co Ltd
Priority to JP05352764A priority Critical patent/JP3122298B2/en
Publication of JPH07195167A publication Critical patent/JPH07195167A/en
Application granted granted Critical
Publication of JP3122298B2 publication Critical patent/JP3122298B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To manufacture a mold precisely setting a cam lobe by forming a recessed part or a projecting part or a part cut off to the projecting part at the side surface of the cam lobe. CONSTITUTION:The cam lobe 6 is manufactured with a sintered alloy so as to arrange the recessed part 10 or the projecting part 11 at the side surface. The cam lobe 6 is assembled with an upper mold or a lower mold and molding sand is filled up and a pattern is removed. The recessed part 10 or the projecting part 11 in the cam lobe 6 is fixed in the molding sand to obstruct the movement of the cam lobe 6 and the mold assembled with the cam lobe 6 is obtd. Molten metal is poured in the mold to obtain a cam shaft with the cam lobe 6. A part of the cam piece is made of the sintered alloy, and the whole wt. can be reduced. As the shaft bending as the cam shaft or the shifting of phase angle of the cam are little, the excess thickness for grinding on the cam is made to be little, and the productivity is improved.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、カムシャフト及びその
製造方法に関し、特に詳述すれば、内燃機関用の複合カ
ムシャフトとその製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camshaft and a method for manufacturing the same, and more particularly to a composite camshaft for an internal combustion engine and a method for manufacturing the same.

【0002】[0002]

【従来の技術】内燃機関用のカムシャフトは、一般に
は、鋳鉄製のものが用いられる。しかし、近年の内燃機
関の高出力、高速化は、カムシャフトのカムピースのカ
ムロブ部にこれ迄以上の耐摩耗性を要求する。カムピー
スの耐摩耗性改善のため複合カムシャフトが提案され
る。複合カムシャフトは、特開昭60−240363号
公報に開示される如く、粉末焼結合金からなるリング状
のカムピースを、鋳型内に配置し、シャフト部の鋳造時
に、カムピースをシャフト部に固定させる構成を有す。
即ち、複合カムシャフトは、粉末焼結合金からなるカム
ピースと、鋳鉄やアルミ合金からなるシャフト部とから
構成される。
2. Description of the Related Art Generally, a camshaft made of cast iron is used for an internal combustion engine. However, in recent years, in order to increase the output and speed of the internal combustion engine, the cam lobe portion of the cam piece of the cam shaft is required to have more wear resistance than ever. A composite camshaft is proposed to improve the wear resistance of the cam piece. As disclosed in Japanese Patent Application Laid-Open No. 60-240363, a composite camshaft has a ring-shaped cam piece made of powdered sintered alloy arranged in a mold, and the cam piece is fixed to the shaft portion during casting of the shaft portion. Have a configuration.
That is, the composite camshaft is composed of a cam piece made of powdered sintered alloy and a shaft portion made of cast iron or aluminum alloy.

【0003】このような複合カムシャフトは、カムピー
ス部の耐摩耗性が優れているので、高出力、高速機関に
適するが、カムピースとシャフト部とが、鋳造時の溶融
金属の凝固収縮により、強固な結合関係とならない。こ
のため、特開平1−278950号公報、実開昭58−
42308号公報や特開昭61−115657号公報に
開示される改良が、カムピースとカムシャフト部との結
合部に施される。この結果、カムピースとカムシャフト
部との結合強度は相当に高くなっている。
Since such a composite camshaft has excellent wear resistance of the cam piece, it is suitable for high-power and high-speed engines. However, the cam piece and the shaft are firm due to solidification shrinkage of molten metal during casting. It does not become an union relationship. For this reason, Japanese Patent Laid-Open No. 278950/1982, Shokai 58-
The improvement disclosed in Japanese Patent No. 42308 and Japanese Patent Application Laid-Open No. 61-115657 is applied to the connecting portion between the cam piece and the cam shaft portion. As a result, the coupling strength between the cam piece and the cam shaft portion is considerably high.

【0004】一方、カムピースを粉末焼結合金で成形す
ることは、粉末合金の量が多く、コスト高となる。
On the other hand, when the cam piece is formed of powdered sintered alloy, the amount of powdered alloy is large and the cost is high.

【0005】[0005]

【発明が解決しようとする課題】粉末合金の量を少くし
て、カムシャフトのコストを下げるには、カムピースの
肉厚を少くするか、大応力の作用するカムロブ部のみを
焼結合金とすればよい。前者の場合、カムピースの強度
を落し、安全に問題を残すので好ましくない。後者の場
合、カムピース本体とカムロブ部との相対的位相角度の
ずれやカムシャフトの軸心に対するカムロブ部の正しい
寸法精度の確保が困難等の理由により、実用化に至って
いない。
In order to reduce the amount of powder alloy and reduce the cost of the camshaft, it is necessary to reduce the wall thickness of the cam piece or to use only the cam lobe portion where large stress acts as a sintered alloy. Good. In the former case, the strength of the cam piece is reduced, and a safety problem remains, which is not preferable. In the latter case, it has not been put to practical use because of the deviation of the relative phase angle between the cam piece main body and the cam lobe portion and the difficulty of ensuring the correct dimensional accuracy of the cam lobe portion with respect to the axis of the cam shaft.

【0006】本発明は、カムピースの一部を焼結合金で
成形することを可能にする手段を開発し、コスト的に有
利にして且つ耐摩耗に優れたカムシャフトとその製造法
を提供することを、解決すべき課題とする。
[0006] The present invention has developed a means for making it possible to form a part of a cam piece with a sintered alloy, and to provide a cam shaft which is cost-effective and has excellent wear resistance, and a manufacturing method thereof. Is a problem to be solved.

【0007】[0007]

【課題を解決するための手段】本発明は、前述した課題
を解決するために、焼結合金からなるカムロブの少くと
も一側面に凸部又は凹部を設け、この部分が鋳型用砂を
つかむ手段を基本的に用いる。この砂はカートリッジの
形態や差し込み用鋳型の形態でもよい。
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cam lobe made of a sintered alloy with a convex portion or a concave portion on at least one side surface, and this portion holds the mold sand. Is basically used. The sand may be in the form of a cartridge or insert mold.

【0008】本発明は、具体的には、金属溶湯により成
形されたカムシャフト部および該カムシャフト部と一体
のカムピースを有し、該カムピースがカムシャフト部と
同材質のカム本体と、粉末焼結合金からなるカムロブと
を備え、該カムロブの少くとも一側面に凹部若しくは凸
部又は凸部の切除をした部分を形成することを特徴とす
るカムシャフトを提供する。
Specifically, the present invention has a camshaft portion formed of a molten metal and a cam piece integral with the camshaft portion, the cam piece being a cam body made of the same material as the camshaft portion, and powder firing. There is provided a cam lobe made of a coupling metal, and a concave portion or a convex portion or a portion obtained by cutting off the convex portion is formed on at least one side surface of the cam lobe.

【0009】さらに、本発明は、焼結合金からなり且つ
その少くとも一側面に凹部又は凸部を有するカムロブを
鋳枠内のカムシャフトとカム本体の模型にセットするこ
と、鋳枠内に鋳型を作ること、模型を抜型した上下鋳型
内に注湯すること、および鋳型より焼結合金からなるカ
ムロブ付きのカムシャフトを取出すことよりなるカムシ
ャフトの製造方法を提供する。
Further, according to the present invention, a cam lobe made of a sintered alloy and having a concave portion or a convex portion on at least one side thereof is set on a model of a cam shaft and a cam main body in a casting frame, and a mold is placed in the casting frame. The present invention provides a method for manufacturing a camshaft, which comprises: making a model, pouring a model into the upper and lower molds, and taking out a camshaft with a cam lobe made of a sintered alloy from the mold.

【0010】加えて、本発明は、焼結合金からなり且つ
その少くとも一側面に凹部又は凸部を有するカムロブを
カートリッジ用枠内のカムシャフトとカム本体の模型に
セットすること、カートリッジ用枠内に鋳型用砂により
カートリッジ型を作り模型を外すこと、上下カートリッ
ジ型をカムシャフト部模型とともに鋳枠内に配し鋳型用
砂により鋳型を作りカムシャフト模型のみを外すこと、
カートリッジ型を内部に有する上下鋳型内に注湯するこ
と、および鋳型よりカムシャフトを取出すことよりなる
カムシャフトの製造方法を提供する。カートリッジ型を
差し込み用鋳型とすることができる。
In addition, according to the present invention, a cam lobe made of a sintered alloy and having a concave portion or a convex portion on at least one side surface thereof is set on a model of a cam shaft and a cam body in a cartridge frame, and a cartridge frame. Remove the model by making a cartridge type with sand for the mold inside, and place the upper and lower cartridge types together with the camshaft model in the casting frame to make the mold with sand for the mold and remove only the camshaft model,
Provided is a method for manufacturing a camshaft, which comprises pouring molten metal into upper and lower molds having a cartridge mold therein, and taking out the camshaft from the mold. A cartridge mold can be used as the insert mold.

【0011】[0011]

【作用】カムロブの少くとも一側面に設けた凸部又は凹
部が鋳砂に喰い込み、カムロブを模型に対して正しい位
置取りとさせる。このため、鋳造したカムシャフトのカ
ムピースの寸法精度はきわめて高い。凸部又は凹部付き
のカムロブをカートリッジ型や差し込み用鋳型に配し、
各カムピースの位相角を任意の角度に精度高く保つこと
もできる。
The convex portion or the concave portion provided on at least one side surface of the cam lobe bites into the sand, and the cam lobe is correctly positioned with respect to the model. Therefore, the dimensional accuracy of the cast camshaft cam piece is extremely high. Place cam lobes with protrusions or depressions in cartridge type or insertion mold,
The phase angle of each cam piece can be accurately maintained at an arbitrary angle.

【0012】[0012]

【実施例】図1にカムシャフト1の一部を示す。カムシ
ャフト1は、カムシャフト部2と、カムピース3とを少
くとも有す。4はカムジャーナル部である。カムピース
3は、カムシャフト部2と同材質で鋳造されたカム本体
5と、焼結合金からなるカムロブ6、7とからなる。カ
ムロブ6、7は、たとえば、化学成分重量%でC:1.5
〜3.5%、P:0.5〜3.0%、Cr:5.0〜15.0%、M
o:0.5〜3.0%、Ni:1.0〜3.5%よりなる粉末合金
を圧粉成型し1100℃〜1200℃で焼結して形成す
る。勿論、他の粉末合金を焼結させて、カムロブ6を成
形してもよい。カムロブ6は、図2に示す如く、カムシ
ャフト部2に接する半円部8を有し、その両端9が18
0度(角度)の関係となっている。カムロブ6の少くと
も一側面、好ましくは、両側面に、凹部10を設ける
か、凸部11を設ける。カムロブ7は、図5−図7に示
す如く、カムシャフト部2に接する円弧部12を有し、
その両端13は、角度にして180度以内の関係とす
る。その側面に凹部10又は凸部11を有す。
EXAMPLE FIG. 1 shows a part of a camshaft 1. The camshaft 1 has at least a camshaft portion 2 and a cam piece 3. 4 is a cam journal section. The cam piece 3 includes a cam body 5 cast from the same material as the cam shaft portion 2, and cam lobes 6 and 7 made of a sintered alloy. The cam lobes 6 and 7 are, for example, C: 1.5 in chemical composition weight%.
~ 3.5%, P: 0.5-3.0%, Cr: 5.0-15.0%, M
It is formed by compacting a powder alloy of o: 0.5 to 3.0% and Ni: 1.0 to 3.5% and sintering at 1100 ° C to 1200 ° C. Of course, other powder alloys may be sintered to form the cam lobe 6. As shown in FIG. 2, the cam lobe 6 has a semi-circular portion 8 in contact with the cam shaft portion 2, and both ends 9 thereof are 18
The relationship is 0 degree (angle). The cam lobe 6 is provided with a concave portion 10 or a convex portion 11 on at least one side surface, preferably both side surfaces. The cam lobe 7, as shown in FIGS. 5 to 7, has an arc portion 12 that is in contact with the cam shaft portion 2,
The both ends 13 have an angle within 180 degrees. The side surface has a concave portion 10 or a convex portion 11.

【0013】図8−図10に示す如く、型枠14内にカ
ムシャフト模型15を配し、この模型15に、焼結合金
からなるカムロブ6、7を配す。カムロブ6、7の端面
9、13には後述する鋳造シャフト部との結合を強固に
するための溝や突出部等の公知手段を適用させるとよ
い。図8の上型、図9の下型をセットした後、シェル砂
をブロー又は自然落させて充填、280℃の温度で2分
間加熱し、鋳型砂を固定した後抜型をする。カムロブ
6、7の凹部10又は凸部11が鋳型砂に固定され、カ
ムロブ6、7の動きが阻止される。
As shown in FIGS. 8 to 10, a camshaft model 15 is arranged in a mold 14, and cam lobes 6 and 7 made of a sintered alloy are arranged in the model 15. It is advisable to apply known means such as a groove or a protrusion to the end surfaces 9 and 13 of the cam lobes 6 and 7 for strengthening the connection with the casting shaft portion described later. After setting the upper mold of FIG. 8 and the lower mold of FIG. 9, the shell sand is blown or naturally dropped and filled, and heated at a temperature of 280 ° C. for 2 minutes to fix the mold sand and then remove the mold. The concave portions 10 or the convex portions 11 of the cam lobes 6 and 7 are fixed to the molding sand, and the movement of the cam lobes 6 and 7 is blocked.

【0014】図11を参照する。図8と図9の型枠14
から抜型した上鋳型16を下鋳型17とを、見切線18
に沿って接着剤に固定し、鋳型空間19を作る。この鋳
型空間19にFC250材相当の溶湯を1400℃〜1
550℃で流し込むとカムロブとシャフト部が溶着した
カムシャフトが得られる。シェル型だけでなく他の有機
自硬性鋳型やCO2 型のような無機自硬性鋳型でも本方法
は、可能である。凹部10から砂をとり、又、凸部11
を切除して完成カムシャフトとする。勿論、凸部11を
切除しなくてもよい。
Referring to FIG. Form 14 of FIGS. 8 and 9
The upper mold 16 and the lower mold 17, which were removed from the
A mold space 19 is created by fixing the mold space 19 along with the adhesive. Molten metal equivalent to FC250 material is poured into the mold space 19 from 1400 ° C to 1
When it is poured at 550 ° C., a camshaft in which the cam lobe and the shaft portion are welded is obtained. This method can be applied not only to the shell type but also to other organic self-hardening molds or inorganic self-hardening molds such as CO 2 type. Sand is taken from the concave portion 10 and the convex portion 11
Is cut off to make a completed camshaft. Of course, the convex portion 11 may not be cut off.

【0015】図12−図14にカートリッジ型20を示
す。このカートリッジ型20は、カムシャフト1の一部
を模した模型に、カムロブ6、7をセットし、図8と図
9で説明した手法と同手法でシェル砂をブローし、28
0℃、2分間の加熱をなして、砂を固定させ、抜型をし
て上下型を接着で固定してカートリッジ型20を作る。
カートリッジ型20の適所に突出部21を形成する。カ
ートリッジ型20とカムシャフト部の模型とを、図8と
図9に示す如き型枠内に配し、シェル砂をブローし、2
80℃の温度で2分間加熱する。砂の固定後、上下型枠
より型抜きし、上下鋳型22、23を接着剤で結合し、
図14の如き、鋳型空間24を有するシェル型とする。
カートリッジ型の砂と上下鋳型22、23を作る砂とは
一体化する。この鋳型空間24にFC250材相当の溶
湯を1400℃〜1550℃で流し込むとカムロブとシ
ャフト部が溶着したカムシャフトが得られた。シェル型
だけでなく他の有機自硬性鋳型やCO2 型のような無機自
硬性鋳型でも本方法は、可能である。カートリッジ型2
2、23の突出部21は、上下鋳型22、23の砂にく
い込み、シェル砂ブロー中のカートリッジ型20の動き
を阻止し、各カートリッジ型20間の相対的位置関係を
正しく保つのに有効である。
A cartridge mold 20 is shown in FIGS. In this cartridge type 20, the cam lobes 6 and 7 are set in a model imitating a part of the camshaft 1, and shell sand is blown by the same method as that described with reference to FIGS.
The cartridge mold 20 is prepared by heating at 0 ° C. for 2 minutes, fixing the sand, removing the mold, and fixing the upper and lower molds by adhesion.
The protrusion 21 is formed at an appropriate position of the cartridge mold 20. The cartridge mold 20 and the model of the camshaft portion are placed in a mold as shown in FIGS. 8 and 9, and the shell sand is blown to
Heat at a temperature of 80 ° C. for 2 minutes. After fixing the sand, it is removed from the upper and lower molds and the upper and lower molds 22 and 23 are bonded with an adhesive,
A shell type having a mold space 24 as shown in FIG.
The sand of the cartridge type and the sand forming the upper and lower molds 22, 23 are integrated. When a molten metal corresponding to FC250 material was poured into the mold space 24 at 1400 ° C to 1550 ° C, a camshaft in which the cam lobe and the shaft portion were welded was obtained. This method can be applied not only to the shell type but also to other organic self-hardening molds or inorganic self-hardening molds such as CO 2 type. Cartridge type 2
The projecting portions 21 of 2 and 23 are effective in preventing the upper and lower molds 22 and 23 from getting sandy, preventing the movement of the cartridge mold 20 during shell sand blowing, and keeping the relative positional relationship between the cartridge molds 20 correct. is there.

【0016】図15と図16に示す如く、焼結合金のカ
ムロブ6、7が見切り線に位置するときには差し込み用
鋳型25を用いるとよい。図18に示す如き差し込み用
鋳型25を、図12と図13に示したカートリッジ型2
0と同手法で構成する。差し込み用鋳型25は、カート
リッジ型20の上型又は下型の何れかに相当する。24
は鋳型空間である。図17に示す如く、カートリッジ模
型枠26内にカムシャフト模型27と焼結合金のカムロ
ブ7並びに差し込み用鋳型の半体に相当する差し込み用
模型28を配し、シェル砂をブローし、280℃の温度
で2分間加熱し、砂を固定させる。上下の型29、30
を成形し、抜型し、差し込み用模型を抜型した空間に差
し込み用鋳型25を挿入し、上下型29、30の見切線
31を接着剤で固定させる(図19参照)。このように
構成した差し込み用鋳型25を内包するカートリッジ2
0を、カムシャフト模型と共に造型し、図14に示す如
き鋳型を得る。この鋳型の鋳型空間24に注湯して、カ
ムシャフトを得る。本例においても、カムロブ6、7の
凹部10又は凸部11が、カートリッジ型20に強固に
くい込み、造型時や注湯時のカムロブ6、7の動きを阻
止する。
As shown in FIGS. 15 and 16, when the cam lobes 6 and 7 made of the sintered alloy are located on the parting line, it is preferable to use the inserting mold 25. The insertion mold 25 shown in FIG. 18 is used as the cartridge mold 2 shown in FIGS. 12 and 13.
The same method as 0 is used. The insertion mold 25 corresponds to either the upper mold or the lower mold of the cartridge mold 20. 24
Is the mold space. As shown in FIG. 17, a camshaft model 27, a cam lobe 7 made of a sintered alloy, and a plugging model 28 corresponding to a half of a plugging mold are placed in a cartridge model frame 26, and shell sand is blown to the 280 ° C. Heat at temperature for 2 minutes to allow sand to set. Upper and lower molds 29, 30
Is molded, and the mold is inserted, the insert mold 25 is inserted into the space where the insert model is removed, and the parting lines 31 of the upper and lower molds 29 and 30 are fixed with an adhesive (see FIG. 19). Cartridge 2 containing the insert mold 25 configured as described above
0 is molded together with a camshaft model to obtain a mold as shown in FIG. A camshaft is obtained by pouring the mold space 24 of this mold. Also in this example, the concave portions 10 or the convex portions 11 of the cam lobes 6 and 7 are hard to be firmly embedded in the cartridge mold 20 and prevent the movement of the cam lobes 6 and 7 during molding or pouring.

【0017】本発明の方法は、シェル型だけでなく一層
造型スピードが早い生砂型にも適用できる。本発明の方
法によって製造されたカムシャフトは、表1の結果が得
られ、鋳型の造型生産性及びカム研磨サイクルも短縮さ
れ大幅なコスト低減が図れることが分る。
The method of the present invention can be applied not only to the shell type but also to the green sand type having a higher molding speed. The cam shaft manufactured by the method of the present invention has the results shown in Table 1, and it can be seen that the molding productivity of the mold and the cam polishing cycle are shortened, and the cost can be significantly reduced.

【0018】[0018]

【表1】 [Table 1]

【0019】[0019]

【効果】以上述べたように本発明によるカムシャフトの
製造方法によれば、焼結合金カムロブのカムロブ粉末の
重量軽減が図られ、カムロブに凹凸形状を付けることに
よって、カムロブが鋳型に精度良くセットされ固定化が
可能であり、またカートリッジ化することによって有機
・無機自硬性鋳型ばかりでなく生砂型によっても製造可
能であり、さらには、カム位相角がずれた場合単純な見
切り線でもって鋳型の分割が可能であり、カムロブが精
度良くセットされた鋳型の製造が可能となる。焼結合金
のカムロブのコスト低減や鋳型造型工数も削減でき生産
性がアップする結果が得られる。また、カムシャフトと
しての軸曲りやカム位相角のずれが少ないことから、カ
ム研磨取り代が少なくでき研磨工数も生産性がアップす
る効果が得られる。
[Effect] As described above, according to the camshaft manufacturing method of the present invention, the weight of the cam lobe powder of the sintered alloy cam lobe can be reduced, and the cam lobe can be accurately set on the mold by providing the concavo-convex shape. And can be fixed, and by making it into a cartridge, it can be manufactured not only with organic / inorganic self-hardening molds but also with sand molds. Furthermore, if the cam phase angle is shifted, a simple parting line It is possible to divide, and it becomes possible to manufacture a mold in which the cam lobe is accurately set. The cost of the cam lobe of the sintered alloy can be reduced, the man-hours for molding can be reduced, and the productivity can be improved. Further, since there is little cam bending as the cam shaft and deviation of the cam phase angle, it is possible to reduce the cam polishing allowance and increase the number of polishing steps.

【図面の簡単な説明】[Brief description of drawings]

【図1】カムシャフトの一部の斜視図である。FIG. 1 is a perspective view of a part of a camshaft.

【図2】カムロブの一例の正面図である。FIG. 2 is a front view of an example of a cam lobe.

【図3】凹部付きカムロブの断面図である。FIG. 3 is a sectional view of a cam lobe with a recess.

【図4】凸部付きカムロブの断面図である。FIG. 4 is a sectional view of a cam lobe with a convex portion.

【図5】カムロブの別の例の正面図である。FIG. 5 is a front view of another example of a cam lobe.

【図6】凹部付きカムロブの断面図である。FIG. 6 is a sectional view of a cam lobe with a recess.

【図7】凸部付きカムロブの断面図である。FIG. 7 is a cross-sectional view of a cam lobe with a convex portion.

【図8】型枠に模型とカムロブを配した図である。FIG. 8 is a view in which a model and a cam lobe are arranged on a mold.

【図9】図8と同じ図、但し下型用の図である。9 is the same view as FIG. 8, but for the lower mold.

【図10】型枠内の模型とカムロブを示す断面図であ
る。
FIG. 10 is a cross-sectional view showing a model and a cam lobe in the mold.

【図11】鋳型内の鋳型空間を示す断面図である。FIG. 11 is a cross-sectional view showing a mold space in the mold.

【図12】カートリッジ型の断面図である。FIG. 12 is a sectional view of a cartridge type.

【図13】カートリッジ型の断面図である。FIG. 13 is a sectional view of a cartridge type.

【図14】カートリッジ型を有する鋳型の断面図であ
る。
FIG. 14 is a cross-sectional view of a mold having a cartridge type.

【図15】見切り線上にカムロブが位置する例の正面図
である。
FIG. 15 is a front view of an example in which a cam lobe is located on a parting line.

【図16】見切り線上にカムロブが位置する別の例の正
面図である。
FIG. 16 is a front view of another example in which the cam lobe is located on the parting line.

【図17】差し込み用模型を使う型枠の断面図である。FIG. 17 is a cross-sectional view of a mold using a model for insertion.

【図18】差し込み用鋳型の斜視図である。FIG. 18 is a perspective view of an insertion mold.

【図19】差し込み鋳型を有するカートリッジ型の正面
図である。
FIG. 19 is a front view of a cartridge type having an insertion mold.

【符号の説明】[Explanation of symbols]

1 カムシャフト 2 カムシャフト部 3 カムピース 5 カム本体 6、7 カムロブ 10 凹部 11 凸部 14 型枠 15、27 模型 19 鋳型空間 20 カートリッジ型 21 突出部 24 鋳型空間 25 差し込み用鋳型 28 差し込み用模型 DESCRIPTION OF SYMBOLS 1 cam shaft 2 cam shaft part 3 cam piece 5 cam body 6, 7 cam lobe 10 concave part 11 convex part 14 form frame 15, 27 model 19 mold space 20 cartridge type 21 projecting part 24 mold space 25 insert mold 28 insert model

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 F01L 1/04 F 6965−3G F16H 53/02 A (72)発明者 坂 勉 埼玉県和光市中央1丁目4番1号 株式会 社本田技術研究所内 (72)発明者 藤原 昭 埼玉県和光市中央1丁目4番1号 株式会 社本田技術研究所内 (72)発明者 山田 範之 埼玉県和光市中央1丁目4番1号 株式会 社本田技術研究所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical indication location F01L 1/04 F 6965-3G F16H 53/02 A (72) Inventor Tsutomu Saka Central Wako City, Saitama Prefecture 1-4-1 No. 1 in Honda R & D Co., Ltd. (72) Inventor Akira Fujiwara Akira Fujiwara, Saitama Prefecture 1-4-1 Chuo Honda R & D Co., Ltd. (72) Inventor Noriyuki Yamada Central Wako-City Saitama 1-4-1 Stock Company Honda Technical Research Institute

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 金属溶湯により成形されたカムシャフト
部および該カムシャフト部と一体のカムピースを有し、
該カムピースがカムシャフト部と同材質のカム本体と、
粉末焼結合金からなるカムロブとを備え、該カムロブの
少くとも一側面に凹部若しくは凸部又は凸部の切除をし
た部分を形成することを特徴とするカムシャフト。
1. A camshaft part formed of molten metal and a cam piece integral with the camshaft part,
The cam piece is a cam body made of the same material as the cam shaft portion,
A camshaft comprising a powder sintered alloy and a camshaft, wherein a concave portion or a convex portion or a portion obtained by cutting the convex portion is formed on at least one side surface of the camlob.
【請求項2】 焼結合金からなり且つその少くとも一側
面に凹部又は凸部を有するカムロブを鋳枠内のカムシャ
フトとカム本体の模型にセットすること、鋳枠内に鋳型
を作ること、模型を抜型した上下鋳型内に注湯するこ
と、および鋳型より焼結合金からなるカムロブ付きのカ
ムシャフトを取出すことよりなるカムシャフトの製造方
法。
2. Setting a cam lobe, which is made of a sintered alloy and has a concave portion or a convex portion on at least one side surface thereof, on a model of a cam shaft and a cam body in a flask, and making a mold in the flask. A method for manufacturing a camshaft, which comprises pouring molten metal into upper and lower molds from which a model has been removed, and taking out a camshaft with a cam lobe made of a sintered alloy from the mold.
【請求項3】 焼結合金からなり且つその少くとも一側
面に凹部又は凸部を有するカムロブをカートリッジ用枠
内のカムシャフトとカム本体の模型にセットすること、
カートリッジ用枠内に鋳型用砂によりカートリッジ型を
作り模型を外すこと、上下カートリッジ型をカムシャフ
ト部模型とともに鋳枠内に配し鋳型用砂により鋳型を作
りカムシャフト模型のみを外すこと、カートリッジ型を
内部に有する上下鋳型内に注湯すること、および鋳型よ
りカムシャフトを取出すことよりなるカムシャフトの製
造方法。
3. Setting a cam lobe, which is made of a sintered alloy and has a concave portion or a convex portion on at least one side surface, on a model of a cam shaft and a cam body in a frame for a cartridge,
Remove the model by making a cartridge mold with sand for the mold in the frame for the cartridge, and place the upper and lower cartridge molds together with the model of the camshaft part in the molding frame to make the mold with sand for the mold and remove only the camshaft model. A method for manufacturing a camshaft, which comprises pouring molten metal into upper and lower molds having the inside and removing the camshaft from the mold.
【請求項4】 カートリッジ型が差し込み用鋳型である
請求項3記載のカムシャフトの製造方法。
4. The method of manufacturing a camshaft according to claim 3, wherein the cartridge type is an insertion mold.
JP05352764A 1993-12-29 1993-12-29 Camshaft and method of manufacturing the same Expired - Fee Related JP3122298B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05352764A JP3122298B2 (en) 1993-12-29 1993-12-29 Camshaft and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05352764A JP3122298B2 (en) 1993-12-29 1993-12-29 Camshaft and method of manufacturing the same

Publications (2)

Publication Number Publication Date
JPH07195167A true JPH07195167A (en) 1995-08-01
JP3122298B2 JP3122298B2 (en) 2001-01-09

Family

ID=18426287

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05352764A Expired - Fee Related JP3122298B2 (en) 1993-12-29 1993-12-29 Camshaft and method of manufacturing the same

Country Status (1)

Country Link
JP (1) JP3122298B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008082232A (en) * 2006-09-27 2008-04-10 Otics Corp Camshaft for internal combustion engine
JP2010149135A (en) * 2008-12-24 2010-07-08 Toyota Motor Corp Method of casting camshaft, the camshaft, and mold for the camshaft
CN113059328A (en) * 2021-04-12 2021-07-02 安庆市庆达模具制造有限公司 Production and manufacturing method of camshaft

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008082232A (en) * 2006-09-27 2008-04-10 Otics Corp Camshaft for internal combustion engine
JP2010149135A (en) * 2008-12-24 2010-07-08 Toyota Motor Corp Method of casting camshaft, the camshaft, and mold for the camshaft
CN113059328A (en) * 2021-04-12 2021-07-02 安庆市庆达模具制造有限公司 Production and manufacturing method of camshaft

Also Published As

Publication number Publication date
JP3122298B2 (en) 2001-01-09

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