JPS60240363A - Production of cam shaft - Google Patents

Production of cam shaft

Info

Publication number
JPS60240363A
JPS60240363A JP9525184A JP9525184A JPS60240363A JP S60240363 A JPS60240363 A JP S60240363A JP 9525184 A JP9525184 A JP 9525184A JP 9525184 A JP9525184 A JP 9525184A JP S60240363 A JPS60240363 A JP S60240363A
Authority
JP
Japan
Prior art keywords
parts
cam
ring
shaft
journal
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
Application number
JP9525184A
Other languages
Japanese (ja)
Inventor
Mutsuhiko Sugano
菅野 睦彦
Shigeyuki Tachibana
橘 茂幸
Hachiro Matsunaga
松永 八郎
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 Metal Corp
Original Assignee
Mitsubishi Metal 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 Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP9525184A priority Critical patent/JPS60240363A/en
Publication of JPS60240363A publication Critical patent/JPS60240363A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H53/00Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02Single-track cams for single-revolution cycles; Camshafts with such cams
    • F16H53/025Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Gears, Cams (AREA)

Abstract

PURPOSE:To produce a cam shaft which has no clatter in cam parts and journal parts in the stage of producing said cam shaft by forming the cam parts and journal parts into an annular shape, forming specifically shaped grooves to the inside surface and matching the axial lines thereof then setting said parts into a casting mold and casting a shaft part. CONSTITUTION:The parts to be formed into the cam parts of the cam shaft and the parts 12 to be formed into the journal parts thereof are made of a sintered alloy having excellent resistance to wear. The parts 11 and the parts 12 are made into the ring shape and are preliminarily formed internally with the grooves 11C, 12c provided respectively with recesses 11a, 12a and projecting parts 11d, 12d as the holes in which the shaft part A pass. These parts are set into the casting mold after the axial lines thereof are matched and thereafter the molten metal for forming the shaft part A is cast into the mold, by which the cam shaft A having the cam parts B and journal parts C is produced. The costly sintered alloy is used only for the cam parts and journal parts and the cam shaft having no clatter from the shaft part is produced at a low cost.

Description

【発明の詳細な説明】 〔産業上の利用分野」 この発明は、自動車のエンジン等に用いられるカムシャ
フトの製造方法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a camshaft used in an automobile engine or the like.

〔従来技術〕[Prior art]

最近、エンジン用のカムシャフトにおいては、耐摩耗性
が要求されるカム部お工びジャーナル部を粉末焼結材に
よって製造することが行われている。この場合、カム部
お工びジャーナル部をシャフト部と一体に製造すると、
高価な粉末焼結材を大量に必要とし、カムシャフトが高
価になってしまう。
Recently, in engine camshafts, cam parts and journal parts that require wear resistance have been manufactured using powder sintered materials. In this case, if the cam part and journal part are manufactured integrally with the shaft part,
This requires a large amount of expensive sintered powder material, making the camshaft expensive.

そこで、この種のカムクヤ7ト′fr:!i!造する場
合には、第2図、第3図にそれぞれ示すように、カム部
となるべきリング状体1、ジャーナル部となるべきリン
グ状体2を粉末焼結材によって予め製造しておき、これ
らリング状体1.2t−シャフト部(図示せず)を鋳造
するためのキャビティ(図示せず)内に、リング状体1
.2の軸線とキャビティの軸線とを互いに合致させた状
態で配置し、その後キャビティ内にアルミニウムあるい
は鉄等の金属溶湯r流し込み、クヤ7ト部の鋳造と同時
にシャフト部の外周にリング状体1.2に固定するよう
にしている。
So, this kind of kamukuya7to'fr:! i! When manufacturing, as shown in FIGS. 2 and 3, a ring-shaped body 1 that will become a cam part and a ring-shaped body 2 that will become a journal part are manufactured in advance from powder sintered material, These ring-shaped bodies 1.2t are placed in a cavity (not shown) for casting the shaft part (not shown).
.. After that, a molten metal such as aluminum or iron is poured into the cavity, and at the same time as the shaft part is cast, a ring-shaped member 1.2 is placed on the outer periphery of the shaft part. I'm trying to fix it at 2.

なお、第一図における符号1a、第3図における符号2
aは−シャフト部に対する位置決めおよび回り止め用の
平行スプライン状の凹部である。
Note that the reference numeral 1a in Figure 1 and the reference numeral 2 in Figure 3
a is a parallel spline-shaped recess for positioning and rotation prevention with respect to the shaft portion;

ところが、上記のようにしてカムシャフトを製造した場
合には、金属溶湯が凝固する際の収縮によってリング状
体1.2とシャフト部との間にガタが発生することがあ
った。
However, when the camshaft is manufactured as described above, play may occur between the ring-shaped body 1.2 and the shaft portion due to contraction when the molten metal solidifies.

〔発明の目的〕[Purpose of the invention]

この発明は、上記問題を解消するためになされたもので
、カム部お工び/またはジャーナル部をシャフト部にガ
タなく強固に固定することができるカムシャフトの製造
方法を提供することを目的とする。
This invention was made to solve the above problem, and an object of the present invention is to provide a method for manufacturing a camshaft that can firmly fix the cam part and/or the journal part to the shaft part without play. do.

〔発明の構成〕[Structure of the invention]

この発明は、上記の目的を達成するために、カム部お工
び/またはジャーナル部+Vング状体となし、このリン
グ状体の内周に内周側の溝幅が外周側の溝幅より狭い溝
を、シャフト部の鋳造前に予め形成1−ておくことを特
徴とするものである。
In order to achieve the above object, this invention has a cam part/or a journal part + a V-ring shaped body, and the groove width on the inner periphery side of the ring shaped body is wider than the groove width on the outer periphery side. It is characterized in that the narrow groove is preformed 1- before the casting of the shaft part.

〔実施例〕〔Example〕

以下、この発明の一実施例について第1図、第7図およ
び#Ij図を参照して説明する。
An embodiment of the present invention will be described below with reference to FIG. 1, FIG. 7, and FIG. #Ij.

ここでまず、この発明の製造方法に1って製造されたカ
ムシャフトについて説明すると、#Ij図に示す工うに
2このカムシャフトは、シャフト部Aの外周にカム部B
お工びジャーナル部Cが設けられた構成になっている。
First, a camshaft manufactured by the manufacturing method of the present invention will be described. This camshaft has a cam part B on the outer periphery of a shaft part A.
It has a construction in which a work journal part C is provided.

このような構成のカムシャフトを製造するに際しては、
′1ずカム部Bお工びジャーナル部Cをリング状体とな
す。
When manufacturing a camshaft with this configuration,
'1 Make the cam part B and the journal part C into a ring-shaped body.

第1図囚、(B)は、カム部Bとなるべきリング状体1
1を示すものである。このリング状体11は、粉末焼結
材からなるものであって、その内周にはシャフト部Aに
対する位置決めおよび回り止めのための凹部11aが形
成されている。このような構成は、上記従来の製造方法
に係るリング状体と同様であるが、このリング状体11
においては、さらにノーズ部11bに近接する内周部分
に溝lieが形成されている。この#111cを画成す
る壁面のうち、内周側の各端部には、溝11cの内側に
向かって突出する凸部lid、lidが形成されており
、これによって内周側の溝幅が外周側の溝幅工9狭くな
されている。
Figure 1 (B) shows the ring-shaped body 1 that will become the cam part B.
1. The ring-shaped body 11 is made of sintered powder material, and has a recess 11a formed on its inner periphery for positioning the shaft portion A and preventing rotation. Such a structure is similar to the ring-shaped body according to the conventional manufacturing method described above, but this ring-shaped body 11
In addition, a groove lie is formed in the inner peripheral portion close to the nose portion 11b. Of the walls defining this #111c, protrusions lid and lid are formed at each end on the inner circumferential side, projecting toward the inner side of the groove 11c, thereby reducing the groove width on the inner circumferential side. The groove width 9 on the outer circumferential side is made narrower.

また、第7図はジャーナル部Cとなるべきリング状体1
2を示すものである。このリング状体12も、リング状
体11と同様に、粉末焼結材によって構成されており、
その内周には凹部12aお工び凸部12d、12dを有
する溝12eが形成されている。
In addition, FIG. 7 shows a ring-shaped body 1 that will become the journal part C.
2. Like the ring-shaped body 11, this ring-shaped body 12 is also made of powder sintered material,
A groove 12e having a concave portion 12a and convex portions 12d, 12d is formed on its inner periphery.

次に、上記の工うに構成されたリング状体11゜12を
、シャフト部Aを鋳造するためのキャビティ(図示せず
)内に、それぞれの軸線を合致させた状態で配置する。
Next, the ring-shaped bodies 11 and 12 constructed in the above manner are placed in a cavity (not shown) for casting the shaft portion A with their respective axes aligned.

その後、キャビティ内にアルミニウムあるいは鉄等の金
属溶湯を流し込み、シャフト部Aを鋳造する。このとき
、金属溶湯がリング状体11.12の各$11c、12
c内に流れ込み、これに工ってシャフト部Aは、棒状を
なす本体部りの外周に頭部が基端s、cり幅広の突起E
、Fが形成された構成になる。
Thereafter, a molten metal such as aluminum or iron is poured into the cavity to cast the shaft portion A. At this time, the molten metal melts into each of the ring-shaped bodies 11 and 12.
The shaft part A flows into the shaft part c, and the shaft part A has a head part on the outer periphery of the rod-shaped main part, with the head part at the base end s, and the wide protrusion E
, F is formed.

なお、シャフト部Aの鋳造と同時にリング状体11.1
2が固定され、その後リング状体11゜12が外周研削
されて所定の寸法に仕上げられるのは従来の製造方法と
同様である。
In addition, at the same time as casting of the shaft part A, the ring-shaped body 11.1 is cast.
2 is fixed, and then the outer periphery of the ring-shaped bodies 11 and 12 is ground to a predetermined size, similar to the conventional manufacturing method.

しかして、上記のようにしてカムシャフトを製造した場
合には、金属溶湯が凝固して収縮すると、シャフト部A
の本体部りと突起Eの頭部とがリング状体11の凸部1
1dt−強力に挾持する。したがって、リング状体11
をシャフト部Aにガタなく強固に固定することができる
。しかも、この実施例においては、凹部12aを形成し
ているので、突起Eの頭部と本体部りの凹部12a内に
存する部分とがそれらの間に存するリング状体11の実
質部を強力に挾持する。したがって、リング状体11を
より一層強固に固定することができる。以上の点につい
ては、リング状体12においても同様である。
However, when the camshaft is manufactured as described above, when the molten metal solidifies and contracts, the shaft portion A
The main body portion and the head of the protrusion E form the convex portion 1 of the ring-shaped body 11.
1dt - Hold firmly. Therefore, the ring-shaped body 11
can be firmly fixed to the shaft portion A without play. Moreover, in this embodiment, since the recess 12a is formed, the head of the protrusion E and the portion of the main body located within the recess 12a forcefully attack the substantial portion of the ring-shaped body 11 existing between them. to hold. Therefore, the ring-shaped body 11 can be fixed even more firmly. The above points also apply to the ring-shaped body 12.

なお、上記の実施例においては、 $ 11 c *1
2cを画成する壁面全体を滑らかな曲面によって構成し
ているが、壁面を平面によって構成し、溝lie、12
cの断面形状を台形状にしてもよい。但し、壁面を曲面
によって構成した場合には、金属溶湯の流れを良くする
ことができるので、そうすることが望ましい。
In addition, in the above example, $ 11 c *1
Although the entire wall surface defining 2c is composed of a smooth curved surface, the wall surface is composed of a flat surface, and the groove 12
The cross-sectional shape of c may be trapezoidal. However, if the wall surface is formed by a curved surface, it is desirable to do so because the flow of the molten metal can be improved.

〔実験例〕[Experiment example]

成分組成がFe−4Cr−θjMn−θjMo−(25
P−3Cである粉末焼結材をjT/dの圧力金もって成
形し、還元雰囲気中において//lItθ℃で3θ分間
保持し、この発明の製造方法および従来の製造方法に係
る、カム部となるべきリング状体をそれぞれ製作した。
The component composition is Fe-4Cr-θjMn-θjMo-(25
P-3C powder sintered material is molded with a pressure of jT/d and held at //lItθ℃ for 3θ minutes in a reducing atmosphere, and the cam part according to the manufacturing method of the present invention and the conventional manufacturing method. Each ring-shaped body was manufactured.

また、成分組成がFe−7JCu−,2Ni−θj M
 o−θ7Cである粉末焼結材を、4T/iの圧力をも
って成形し、還元雰囲気中において//り0℃で3θ分
間保持し、この発明の製造方法お工び従来の製造方法に
係る。ジャーナル部となるべきリング状体をそれぞれ製
作した。
In addition, the component composition is Fe-7JCu-,2Ni-θj M
A powder sintered material of o-θ7C was molded under a pressure of 4 T/i and held at 0° C. for 3θ minutes in a reducing atmosphere, and the manufacturing method of the present invention and the conventional manufacturing method were used. Each ring-shaped body to become a journal part was manufactured.

そして、これらリング状体?所定のダイカスト型のギャ
ビテイ内に設置し、アルミニウムの溶湯をキャビティ内
に流し込んでカム7ヤ7トを得た。
And these ring-shaped bodies? The cam 7 was installed in a predetermined die-casting mold cavity, and molten aluminum was poured into the cavity to obtain a cam 7.

このようにして得られたこの発明の製造方法お工び従来
の製造方法に係るカムシャフトをそれぞれ一〇本体重備
し、オーバヘッドカム方大のガソリンエンジンに組み込
み%3θθθr−p−m、油温//θ℃で750時間の
連続運転を行い、シャフト部とカム部およびジャーナル
部との間のガタの発生状況を調べた。その結果、下表に
示すとおり、従来の製造方法に係るカムシャフトにおい
ては、カム部およびジャーナル部とシャフト部との間の
いずれにもガタが発生したが、この発明に係るカムシャ
フトにおいては、そのようなガタの発生が皆無であった
Each of the camshafts produced by the manufacturing method of the present invention and the conventional manufacturing method thus obtained was equipped with 10 bodies, and installed in a gasoline engine with a larger overhead cam.%3θθθr-pm, oil temperature Continuous operation was performed for 750 hours at //θ°C, and the occurrence of backlash between the shaft portion, cam portion, and journal portion was investigated. As a result, as shown in the table below, in the camshaft according to the conventional manufacturing method, play occurred in both the cam part and between the journal part and the shaft part, but in the camshaft according to the present invention, There was no occurrence of such backlash.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明のカムシャフトの製造方
法によれば、カム部お1び/またはジャーナル部をリン
グ状体となし、このリング状体の内周に内周側の#幅が
外周側の#I@より狭い溝をシャフト部の鋳造前に予め
形成するようにしているから、カム部およびジャーナル
部をシャフト部にガタなく強固に固定することができる
という効果が得られる。
As explained above, according to the method for manufacturing a camshaft of the present invention, the cam portion and/or the journal portion are formed into a ring-shaped body, and the # width on the inner circumference side is set on the inner circumference of the ring-shaped body. Since the groove narrower than #I@ on the side is formed in advance before casting the shaft portion, it is possible to obtain the effect that the cam portion and the journal portion can be firmly fixed to the shaft portion without play.

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

第1図はこの発明の製造方法に係るリング状体(カム部
)の−例全示し、第1図(8)はその正面図、第1図(
B)はその側断面図、第一図は従来の製造方 □法に係
るリング状体(カム部)の−鉤を示し、第−回置はその
正面図、第一図(Blはその側断面図、第3図は従来の
製造方法に係るリング状体(ジャーナル部)の−例を示
し7.第3図(5)はその平面図、第3図(B)はその
側断面図、第1図はこの発明の製造方法に係るリング状
体(ジャーナル部)の−例を示し、第q幽囚はその正面
図、第1図THIは七の側断面図、第5図はこの発明の
製造方fbVcLってInしたカムシャフトの一例8−
云す憑断面IGIでkる。 A・・・・・・シャフト部、B・・・・・・カム部、C
・・・・・・ジャーナル部、11・・・・・・カム部と
なるべきリング状体、lie・・・・・・溝、12・・
・・・・ジャーナル部となるべきリング状体、12c・
・・・・・溝。 出願人三菱金属株式会社
FIG. 1 shows a complete example of a ring-shaped body (cam part) according to the manufacturing method of the present invention, FIG. 1 (8) is a front view thereof, and FIG.
B) is its side sectional view, the first figure shows the - hook of the ring-shaped body (cam part) according to the conventional manufacturing method □ method, the -th rotation is its front view, and the first figure (Bl is its side 3 shows an example of a ring-shaped body (journal part) according to a conventional manufacturing method. 7. FIG. 3 (5) is a plan view thereof, and FIG. 3 (B) is a side sectional view thereof. Fig. 1 shows an example of a ring-shaped body (journal portion) according to the manufacturing method of the present invention, the q-th prisoner is a front view thereof, Fig. 1 THI is a side sectional view of 7, and Fig. 5 is a sectional view of the ring-shaped body (journal portion) according to the manufacturing method of the present invention. An example of a camshaft manufactured using the fbVcL method 8-
It is said that the possession section IGI is k. A...Shaft part, B...Cam part, C
...Journal part, 11...Ring-shaped body to become a cam part, lie...Groove, 12...
...Ring-shaped body to become the journal part, 12c.
·····groove. Applicant Mitsubishi Metals Corporation

Claims (1)

【特許請求の範囲】[Claims] シャフト部の外周にカム部およびジャーナル部を設けて
なるカムシャフトを製造するに際し、前記カム部お工び
/またはジャーナル部をリング状体となし、このリング
状体金りヤ7ト部を鋳造するだめのキャビティ内に互い
の軸線を合致させた状態で配置し、その後キャビティ内
に金属溶湯を流し込んでシャフト部を鋳造するのと同時
に、このシャフト部の外周にリング状体を固定するよう
にしたカムシャフトの製造方法において、前記リング状
体の内周に内周側の溝幅が外周側の溝幅工り狭い溝を、
シャフト部の鋳造前に予め形成しておくことを特徴とす
るカムシャフトの製造方法。
When manufacturing a camshaft in which a cam part and a journal part are provided on the outer periphery of the shaft part, the cam part is machined/or the journal part is made into a ring-shaped body, and this ring-shaped body metal part is cast. They are placed in the cavity of the shaft with their axes aligned, and then molten metal is poured into the cavity to cast the shaft, and at the same time a ring-shaped body is fixed to the outer periphery of the shaft. In the method for manufacturing a camshaft, a groove is formed on the inner circumference of the ring-shaped body so that the groove width on the inner circumference side is narrower on the outer circumference side,
A method for manufacturing a camshaft, characterized in that the shaft portion is formed in advance before casting.
JP9525184A 1984-05-12 1984-05-12 Production of cam shaft Pending JPS60240363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9525184A JPS60240363A (en) 1984-05-12 1984-05-12 Production of cam shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9525184A JPS60240363A (en) 1984-05-12 1984-05-12 Production of cam shaft

Publications (1)

Publication Number Publication Date
JPS60240363A true JPS60240363A (en) 1985-11-29

Family

ID=14132534

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9525184A Pending JPS60240363A (en) 1984-05-12 1984-05-12 Production of cam shaft

Country Status (1)

Country Link
JP (1) JPS60240363A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645259A (en) * 1979-09-17 1981-04-24 Honda Motor Co Ltd Casting comprising dissimilar materials

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645259A (en) * 1979-09-17 1981-04-24 Honda Motor Co Ltd Casting comprising dissimilar materials

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