JPS6070108A - Production of cam shaft - Google Patents

Production of cam shaft

Info

Publication number
JPS6070108A
JPS6070108A JP17997483A JP17997483A JPS6070108A JP S6070108 A JPS6070108 A JP S6070108A JP 17997483 A JP17997483 A JP 17997483A JP 17997483 A JP17997483 A JP 17997483A JP S6070108 A JPS6070108 A JP S6070108A
Authority
JP
Japan
Prior art keywords
journal
cam lobe
shaft
hollow shaft
cam
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
JP17997483A
Other languages
Japanese (ja)
Inventor
Genkichi Umeba
梅葉 源吉
Shigeru Urano
浦野 茂
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.)
Nippon Piston Ring Co Ltd
Original Assignee
Nippon Piston Ring Co Ltd
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 Nippon Piston Ring Co Ltd filed Critical Nippon Piston Ring Co Ltd
Priority to JP17997483A priority Critical patent/JPS6070108A/en
Publication of JPS6070108A publication Critical patent/JPS6070108A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To manufacture easily a cam shaft having high strength by positioning the recesses formed on the outside circumferential surface of a hollow shaft and the pins embedded into the shaft fitting holes of cam lobes and sintering and uniting the shaft and the cam lobes to one body. CONSTITUTION:Recesses 3 of the same number as the number of cam lobes 2 or journals to be assembled are formed to the prescribed positions on the outside circumferential surface of a hollow shaft 1. On the other hand, pins 4 are embedded via springs 7 into pin-inserting holes 6 formed to the inside circumference of the holes 5 to be fitted to the shaft by machining simultaneously with compaction molding of the lobes 2 or journals consisting of a liquid phase sintering material or after the compaction molding so that the pins 4 can be slightly put into said holes and out thereof. Such lobes 2 or journals are fitted to the shaft 1 and are positioned by engaging said recesses 3 and the pins 4 and thereafter the shaft 1 and the lobes 2 or journals are sintered and united to one body, by which the cam shaft is obtd.

Description

【発明の詳細な説明】 本発明はカムシャフトの製造方法に関し、特に、シャフ
トに対してカムログ又はジャーナルを組付は一体化する
組立式カムシャフトの製造方法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a camshaft, and more particularly to a method for manufacturing an assembled camshaft in which a cam log or journal is assembled and integrated with the shaft.

組立式カムシャフトを製造する場合においては、いかな
る方法で行なえばシャフトに対するカムログ又はジャー
ナルの軸線方向位置および回転方向位置を正確に位置決
めできるかという点およびいかなる方法で行なえばシャ
フトに対しカムロブ又はジャーナルを堅固に固定できる
かという点が問題となる。
When manufacturing a prefabricated camshaft, it is important to consider how to accurately position the cam lobe or journal relative to the shaft in the axial and rotational directions, and how to accurately position the cam lobe or journal relative to the shaft. The question is whether it can be firmly fixed.

組立シャフトの製造方法に関する従来技術としては、特
開昭37−左7906号および特開昭57−/!r’l
!;!A号等に開示された技術が知られている。
Prior art related to the manufacturing method of assembled shafts is disclosed in Japanese Patent Application Laid-open No. 37-Sho 7906 and Japanese Patent Laid-open No. 57-/! r'l
! ;! The technique disclosed in No. A etc. is known.

前者はシャフトに対し隙間嵌めによシカムロブ又はジャ
ーナル等の嵌合部材を組付け、しかる後に両端をかしめ
るものであり、後者はパイプに設けたピン孔とカムに設
けたピン孔とを油孔付きピンにて一体化させるものであ
る。しかしながら、これらの方法は、いずれも組付は後
のかしめ工程又は♂ン挿入工程を必要とするだけでなく
、完成されたカムシャフト自体の強度も十分でないとい
う欠点がある。
The former involves assembling a fitting member such as a cam lobe or journal onto the shaft with a clearance fit, and then caulking both ends.The latter involves connecting the pin hole in the pipe and the pin hole in the cam to the oil hole. It is integrated with a pin. However, all of these methods have the disadvantage that not only does assembly require a subsequent caulking step or a reinsertion step, but also that the strength of the completed camshaft itself is not sufficient.

従って、本発明の目的は、組付は後の加工工程を不要と
し、しかも強度の高いカムシャフトを得ることのできる
製造方法を提供することである。
Accordingly, an object of the present invention is to provide a manufacturing method that eliminates the need for post-assembly machining steps and that allows a camshaft with high strength to be obtained.

以下、本発明の実施例を添付図面に基いて説明する。尚
、本明細書において「カムロブ又はジャーナル」と表現
する場合は、「カムログ又はジャーナルのいずれか」の
意味と、「カムロブおよびジャーナルの双方」の意味を
含むものとする。
Embodiments of the present invention will be described below with reference to the accompanying drawings. In this specification, the expression "cam lobe or journal" includes the meaning of "either the cam log or the journal" and the meaning of "both the cam lobe and the journal."

第7図〜第を図は、本発明によるカムシャフト製造方法
の第1の実施例を示すものである。
7 to 7 show a first embodiment of the camshaft manufacturing method according to the present invention.

第1図に示すように1中空シヤフト1の外周表面には、
組付けられるべきカムロブ2(第3図。
As shown in Fig. 1, on the outer peripheral surface of the hollow shaft 1,
Cam lobe 2 to be assembled (Fig. 3).

第を図)又はジャーナル(図示せず)と同数の凹所3を
形成する。凹所3の形状は、第2図(a) 、 (+1
)。
The same number of recesses 3 are formed as there are journals (not shown) or journals (not shown). The shape of the recess 3 is shown in Fig. 2 (a), (+1
).

(c)に示すように半球形状、円錐状、矩形状等の任意
の形状にすることができる。
As shown in (c), it can be formed into any shape such as a hemispherical shape, a conical shape, or a rectangular shape.

第3図は、カムログ2にピン4を埋め込む方法を示すも
のであるが、ジャーナルにピン4を埋め込む方法も同様
である。カムロブ2自体は液相焼結材を圧粉成形したも
のであり、シャフト嵌合孔5は圧粉成形時に成形される
。ピン4を埋込むためのビン挿入孔6は圧粉成形時に形
成してもよくあるいは圧粉成形後の機械加工により形成
してもよい。ピン挿入孔6とピン4との間にはばね7を
介在しておき、カムログ2を中空シャフト1に、嵌合す
るとき、ピン4が僅かに出入りできるようになっている
。−ン4の材質は、カムロブ又はジャーナルの材質であ
る液相焼結材よりも融点の低い材料とする。
Although FIG. 3 shows a method for embedding the pin 4 in the cam log 2, the method for embedding the pin 4 in the journal is also similar. The cam lobe 2 itself is formed by powder molding a liquid phase sintered material, and the shaft fitting hole 5 is formed during the powder molding. The bottle insertion hole 6 for embedding the pin 4 may be formed during powder compacting or may be formed by machining after powder compacting. A spring 7 is interposed between the pin insertion hole 6 and the pin 4, so that the pin 4 can move in and out slightly when the cam log 2 is fitted into the hollow shaft 1. - The material of the ring 4 is a material having a lower melting point than the liquid phase sintered material that is the material of the cam lobe or journal.

上記のごとくして、カムログ又はジャーナルのピン挿入
孔6内にピン4を埋め込んだならば、次に第を図に示す
ように中空シャフト1に嵌合させ、中空シャフト1の外
周表面に形成された前記凹所3とピン4の頭とを合わせ
て位置決めする。
After the pin 4 is embedded in the pin insertion hole 6 of the cam log or journal as described above, the pin 4 is fitted onto the hollow shaft 1 as shown in the figure, and the pin 4 is formed on the outer peripheral surface of the hollow shaft 1. Align and position the recess 3 and the head of the pin 4.

最後に、上記のごとくして中空シャフト1に対しカムロ
ブ又はジャーナルが位置決めされたならば、これらを焼
結し、一体化させることによって堅固な組立カムシャフ
トが完成する。
Finally, once the cam lobes or journals have been positioned relative to the hollow shaft 1 as described above, they are sintered and integrated to complete a rigid assembled camshaft.

第5図〜第7図は、本発明によるカムシャフト製造方法
の第2の実施例を示すものである。
5 to 7 show a second embodiment of the camshaft manufacturing method according to the present invention.

この実施例において、第1の実施例に使用した部材又は
構造と実質的に同一のものについては同じ番号を用いて
いる。この第コの実施例は、ビン4を中空シャフト1に
埋め込んでおり、凹所3をカムロブ2又はジャーナル(
図示せず)のシャフト嵌合孔5の内周面に形成してあり
、ちょうど第1の実施例と逆の配置関係をなすものであ
る。この実施例の場合には、凹所3は、第6図(a)に
示すようにカムロブ又はジャーナルの軸線方向に沿って
長くかつ片側が開放された溝として形成してもよく、あ
るいは、第4図(b)に示すように開放していない凹み
としてもよい。第6図(a)のような溝とする場合には
、第7図(a)に示すように、溝の入口部分の深さを浅
く、中央に向かうにしたがって深くなるようにして、シ
ャフト1に対して一旦嵌合されたカムロブ又はジャーナ
ルが変位し難くするのがよい。
In this embodiment, the same numbers are used for components or structures that are substantially the same as those used in the first embodiment. In this third embodiment, the bottle 4 is embedded in the hollow shaft 1, and the recess 3 is replaced by a cam lobe 2 or a journal (
The shaft fitting hole 5 (not shown) is formed on the inner peripheral surface of the shaft fitting hole 5, and the arrangement is exactly opposite to that of the first embodiment. In this embodiment, the recess 3 may be formed as a long, open-sided groove along the axial direction of the cam lobe or journal, as shown in FIG. It may be a recess that is not open as shown in FIG. 4(b). In the case of forming a groove as shown in FIG. 6(a), the depth of the entrance portion of the groove is shallow and becomes deeper toward the center, as shown in FIG. 7(a), so that the shaft 1 It is preferable to make it difficult for the cam lobe or journal to displace once it is fitted to the cam lobe or journal.

その他の点においては、第2の実施例による方法は第7
の実施例による方法と同様である。
In other respects, the method according to the second embodiment
This is similar to the method according to the embodiment.

以上から明らかな通り、本発明のカムシャフト製造方法
によれば、カムロブ又はジャーナルを中空シャフトに対
し組付けた後は単に焼結するだけでよく、従来の方法の
ような組付後のかしめ工程やビン挿入工程を省略でき、
しかも焼結により一体化させるものであるからきわめて
堅固なカムシャフトを製造できるものである。
As is clear from the above, according to the camshaft manufacturing method of the present invention, after assembling the cam lobe or journal to the hollow shaft, it is sufficient to simply sinter it, and the caulking process after assembling as in the conventional method is unnecessary. and bottle insertion process can be omitted.
Moreover, since it is integrated by sintering, it is possible to manufacture an extremely strong camshaft.

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

第1図〜第ダ図は、本発明の方法の第1の実施例を示す
ものであり、このうち、 第1図は、中空シャフトの斜視図であり、第一図(a)
 、 (b) 、 (c)は、中空シャフトの外周表面
に形成される凹所の各種の形状を示す断面図であり、 第3図(a) 、 (b) 、 (c)は、カムロブに
ビンを埋め込んだ状態を示す、それぞれ横断面図、縦断
面図、斜視図であり、 第り図(a) 、 (b)は、シャフトにカムロブを嵌
合して位置決めした状態を示す横断面図および縦断面図
である。 第5図〜第7図は、本発明の方法の第コの実施例を示す
ものであり、このうち、 第S図は、中空シャフトにビンが埋め込まれた状態を示
す断面図であり、 第6図(a) 、 (b)は、カムロブに形成された凹
所の種々の形状を示す斜視図であり、 第7図(a) 、 (b)は、シャフトにカムロブを嵌
合して位置決めした状態を示す縦断面図である。 1・・・・・・・・・中空シャフト、2・・・・・・・
・・カムロブ、3・・・・・・・・・凹所、 4・・・
・・・・・・ビン、5・・・・・・・・・シャフト嵌合
孔、6・・・・・・・・・ ビン挿入孔、7・・・・・
・・・・ばね。
Figures 1 to 3 show a first embodiment of the method of the present invention, in which Figure 1 is a perspective view of a hollow shaft;
, (b) and (c) are cross-sectional views showing various shapes of recesses formed on the outer circumferential surface of the hollow shaft, and FIGS. They are a cross-sectional view, a longitudinal cross-sectional view, and a perspective view, respectively, showing the bottle embedded, and Figures (a) and (b) are cross-sectional views showing the shaft with the cam lobe fitted and positioned. and a vertical cross-sectional view. 5 to 7 show a third embodiment of the method of the present invention, of which FIG. S is a sectional view showing a state in which a bottle is embedded in a hollow shaft; 6(a) and (b) are perspective views showing various shapes of recesses formed in the cam lobe, and FIGS. 7(a) and (b) are perspective views showing the positioning of the cam lobe by fitting it onto the shaft. FIG. 1...Hollow shaft, 2...
...cam lob, 3...concavity, 4...
...Bin, 5...Shaft fitting hole, 6...Bin insertion hole, 7...
...Spring.

Claims (3)

【特許請求の範囲】[Claims] (1)液相焼結材からなるカムロブ又はジャーナルを中
空シャフトに組付けて両者を液相焼結により一体結合さ
せてカムシャフトを製造する方法において、 中空シャフトの外周表面の所定位置に、組付ケラれるべ
きカムロブ又はジャーナルと同数の凹所を形成し、 カムロブ又はジャーナルの圧粉成形と同時に又は圧粉成
形後の機械加工によりカムロブ又はジャーナルのシャフ
ト嵌合孔の内周に形成したピン挿入孔にピンを埋め込み
、 中空シャフトにカムロブ又はジャーナルを嵌合して中空
シャフトの前記凹所とカムロブ又はジャーナルの前記ピ
ンとを位°置決め、し、中空シャフトとカムロブ又はジ
ャーナルとを焼結し一体化させることを特徴とするカム
シャフトの製造方法。
(1) In a method of manufacturing a camshaft by assembling a cam lobe or journal made of liquid-phase sintered material onto a hollow shaft and integrally joining the two by liquid-phase sintering, the assembly is performed at a predetermined position on the outer peripheral surface of the hollow shaft. A pin is inserted into the inner periphery of the shaft fitting hole of the cam lobe or journal by forming the same number of recesses as the cam lobe or journal to be kerbed, and by machining the cam lobe or journal at the same time as the compacting of the cam lobe or journal or by machining after the compacting. Embed a pin in the hole, fit a cam lobe or journal into the hollow shaft, position the recess of the hollow shaft and the pin of the cam lobe or journal, and sinter the hollow shaft and the cam lobe or journal to integrate them. A method for manufacturing a camshaft, characterized by:
(2)液相焼結材からなるカムロブ又はジャーナルを中
空シャフトに組付けて両者を液相焼結により一体結合さ
せてカムシャフトを製造する方法において、 中空シャフトの外周表面の所定位置に、組付けられるべ
きカムロブ又はジャーナルと同数のピンを埋め込み、 カムログ又はジャーナルの圧粉成形と同時に又は圧粉成
形後の機械加工によシカムロプ又はジャーナルのシャフ
ト嵌合孔の内周に凹所を形成し、 中空シャフトにカムロブ又はジャーナルを嵌合して中空
シャフトの前記ピンとカムロブ又はジャーナルの前記凹
所とを位置決めし、中空シャフトとカムロブ又はジャー
ナルとを焼結し一体化させることを特徴とするカムシャ
フトの製造方法。
(2) In a method of manufacturing a camshaft by assembling a cam lobe or journal made of liquid-phase sintered material onto a hollow shaft and integrally joining the two by liquid-phase sintering, Embed the same number of pins as the cam lobe or journal to be attached, form a recess on the inner periphery of the shaft fitting hole of the cam lobe or journal at the same time as the compacting of the cam log or journal or by machining after compacting, A camshaft characterized in that a cam lobe or journal is fitted into a hollow shaft to position the pin of the hollow shaft and the recess of the cam lobe or journal, and the hollow shaft and the cam lobe or journal are sintered and integrated. Production method.
(3) カムログ又はジャーナルのシャフト嵌合孔の内
周に形成された前記凹所は、カムロブ又はジャーナルの
軸線方向に長くかつ片側が開放した溝又は開放していな
い凹みであることを特徴とする特許請求の範囲第一項に
記載のカムシャフトの製造方法。
(3) The recess formed on the inner periphery of the shaft fitting hole of the cam lobe or journal is characterized in that it is a groove that is long in the axial direction of the cam lobe or journal and is open on one side or a recess that is not open. A method for manufacturing a camshaft according to claim 1.
JP17997483A 1983-09-28 1983-09-28 Production of cam shaft Pending JPS6070108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17997483A JPS6070108A (en) 1983-09-28 1983-09-28 Production of cam shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17997483A JPS6070108A (en) 1983-09-28 1983-09-28 Production of cam shaft

Publications (1)

Publication Number Publication Date
JPS6070108A true JPS6070108A (en) 1985-04-20

Family

ID=16075233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17997483A Pending JPS6070108A (en) 1983-09-28 1983-09-28 Production of cam shaft

Country Status (1)

Country Link
JP (1) JPS6070108A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155605A (en) * 1984-01-24 1985-08-15 Toyota Motor Corp Fitting and fixing method of sintered parts
US5392511A (en) * 1993-04-21 1995-02-28 T & N Technology Limited Manufacture of camshafts
US5404770A (en) * 1991-08-14 1995-04-11 Volkswagen Ag Variable cam arrangement for a lift valve
US5729899A (en) * 1996-10-09 1998-03-24 Kaywood Products Corporation Camshaft assembly and method of making same
DE102010009040B4 (en) 2009-03-09 2019-10-17 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Concentric camshaft and engine assembly equipped therewith

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723150A (en) * 1980-07-16 1982-02-06 Nec Corp Instruction execution device
JPS5759465A (en) * 1980-09-29 1982-04-09 Hitachi Ltd Dc electric nachine
JPS57154556A (en) * 1981-03-19 1982-09-24 Nippon Piston Ring Co Ltd Manufacturing method of cam shaft

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723150A (en) * 1980-07-16 1982-02-06 Nec Corp Instruction execution device
JPS5759465A (en) * 1980-09-29 1982-04-09 Hitachi Ltd Dc electric nachine
JPS57154556A (en) * 1981-03-19 1982-09-24 Nippon Piston Ring Co Ltd Manufacturing method of cam shaft

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155605A (en) * 1984-01-24 1985-08-15 Toyota Motor Corp Fitting and fixing method of sintered parts
JPH0525921B2 (en) * 1984-01-24 1993-04-14 Toyota Motor Co Ltd
US5404770A (en) * 1991-08-14 1995-04-11 Volkswagen Ag Variable cam arrangement for a lift valve
US5392511A (en) * 1993-04-21 1995-02-28 T & N Technology Limited Manufacture of camshafts
US5729899A (en) * 1996-10-09 1998-03-24 Kaywood Products Corporation Camshaft assembly and method of making same
DE102010009040B4 (en) 2009-03-09 2019-10-17 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Concentric camshaft and engine assembly equipped therewith

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