JPS60218402A - Manufacture of cam shaft - Google Patents
Manufacture of cam shaftInfo
- Publication number
- JPS60218402A JPS60218402A JP7388484A JP7388484A JPS60218402A JP S60218402 A JPS60218402 A JP S60218402A JP 7388484 A JP7388484 A JP 7388484A JP 7388484 A JP7388484 A JP 7388484A JP S60218402 A JPS60218402 A JP S60218402A
- Authority
- JP
- Japan
- Prior art keywords
- hollow shaft
- oil supply
- copper
- supply hole
- bodies
- 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
Links
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
本発明は内燃機関の動弁用カムシャフトの製造方法に関
し、さらに詳言すると、中空シャフトとそのＥに嵌着さ
れた焼結材組イ１け部品とその組付は部品の表面からシ
ャフト中空部に至る油供給孔からなるカムシャフトの製
造方法に係る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a camshaft for a valve train of an internal combustion engine, and more specifically, the present invention relates to a method for manufacturing a camshaft for a valve train of an internal combustion engine. The single part and its assembly relate to a method of manufacturing a camshaft that includes an oil supply hole extending from the surface of the part to the hollow part of the shaft.
［従来技術］
鋼管製シャフトと、その上に嵌着された焼結材製のカム
、ジャーナル等の組付は部品と、その組伺は部品の表面
からシャフト中空部に至る油供給孔を備えたカムシャフ
トは軽量で１η滑性も良好であるが、公知の製造方法は
、特開昭５７−１５４５５６号に開示されているように
、機械加工により油供給孔を形成していたので、機械加
工に伴うコストの一ヒ昇をさけることはできなかった。[Prior art] The assembly of a steel pipe shaft and a sintered material cam, journal, etc. fitted onto the shaft is done using parts, and the assembly is provided with an oil supply hole extending from the surface of the part to the hollow part of the shaft. The camshaft is lightweight and has good 1η lubricity, but the known manufacturing method, as disclosed in JP-A-57-154556, involves forming the oil supply hole by machining. It was not possible to avoid an increase in costs associated with processing.
［発明の目的］
本発明はカム、ジャーナル等の組付け部品の表面からシ
ャフト中空部に抜ける油供給孔が機械加工を伴わずに形
成されるカムシャフトの製造方法を提供しようとするも
のである。[Object of the Invention] The present invention aims to provide a method for manufacturing a camshaft in which an oil supply hole extending from the surface of an assembled part such as a cam or journal into a hollow part of the shaft is formed without machining. .
［発明の構成］
前記目的を達成するため、本発明の方法は、カム、ジャ
ーナル等の１伺は部品を端面に溝を有する二つ割りの半
休に圧粉成形し、その二つ割りの半休を溝同志が合致し
て一つの油供給孔を形成するように組合わせて中空シャ
フトに組付け、形成された油供給孔が中空シャフトの半
径方向の油供給孔と連通ずるように組合わせた半休を中
空シャフトに接合するカムシャフトの製造方法であって
、組付は部品は銅を１７〜３５重量％含有する鉄系固相
材からなることを持金とする。組付は部品を中空シャフ
トに組付けて固相焼結すると、１伺は部品中の銅が溶融
浸出して中空シャフト内に拡散し、組付は部品と中空シ
ャフトを一体化結合させる。[Structure of the Invention] In order to achieve the above-mentioned object, the method of the present invention comprises powder forming parts such as cams and journals into two halves having grooves on the end faces, and forming the two halves with grooves. The hollow shaft is assembled with half-holes that are assembled so that they match to form one oil supply hole, and are assembled to the hollow shaft so that the formed oil supply hole communicates with the oil supply hole in the radial direction of the hollow shaft. A method for manufacturing a camshaft to be joined to a camshaft, in which the parts are assembled using a ferrous solid material containing 17 to 35% by weight of copper. During assembly, when the parts are assembled onto the hollow shaft and solid phase sintered, the copper in the parts melts and leaches out and diffuses into the hollow shaft, and during the assembly, the parts and the hollow shaft are integrally joined.
［実施例］ 本発明の方法を図面に示す実施例に基づいて説明する。[Example] The method of the present invention will be explained based on embodiments shown in the drawings.
第１図にカムシャフトは符号ｌによって全体的に示され
ている。このカムシャツ）ｌは中空軸２、カム３、ジャ
ーナル４等のカムシャフト構成部品（以下、部品と呼ぶ
）から構成されている。In FIG. 1, the camshaft is designated generally by l. This cam shirt (1) is composed of camshaft components (hereinafter referred to as parts) such as a hollow shaft 2, a cam 3, and a journal 4.
カム３及びジャーナル４は中空軸２の外周面に密着し、
カム３、ジャーナル４及び中空軸２には、カム及びジャ
ーナルの摺動面と中空軸の内周面を連通させるための油
供給孔５．６がそれぞれ設けられている。このように構
成されたカムシャフトはエンジン作動中回転し、その時
発生する遠心力によって中空軸内の油を油供給孔を通し
て摺動面へ供給し、摺動面に接触するエンジンの動弁を
潤滑する。The cam 3 and journal 4 are in close contact with the outer peripheral surface of the hollow shaft 2,
The cam 3, journal 4, and hollow shaft 2 are each provided with an oil supply hole 5.6 for communicating the sliding surfaces of the cam and journal with the inner peripheral surface of the hollow shaft. The camshaft configured in this way rotates while the engine is operating, and the centrifugal force generated at that time supplies oil in the hollow shaft to the sliding surface through the oil supply hole, lubricating the engine valves that come into contact with the sliding surface. do.
本発明の方法によると、」−記カムシャフトは次の工程
に従って製造される。第２ないし第５図に示すように、
Ｃｕを含有する部品製造用焼結合金の粉体は所定の部品
形状（図ではジャーナル形状）に圧粉成形されるが、こ
のとき、部品４は二分割された半休４ａ、４ｂとして形
成され、各半休４ａ、４ｂは片側の端面に半円筒形状の
油供給孔６（あるいは５）を有する状態に圧粉成形され
る。圧縮方向は第２図と第５図において矢印で示すうに
Ａ−Ａ ′あるいはＢ−Ｂ ’方向に行なわれる。第３
図は第２図をＡ方向から見た止血図であり、第４図は第
５図をＢ方向から見た正面図である。中空軸には部品の
油供給孔き対応する所定の位置に予め油供給孔を形成し
ておく。中空軸は、通常、鋼製である。次に、第６図に
示すように、半休４ ａ 、’ ４ ｂの油供給孔６，
６同志が正確に当接し、別に油供給孔が形成された鋼製
中空軸２に一体になった部品４の油供給孔６が連通ずる
ように組付けられる。この際、部品と中空軸の相対位置
を固定するために、部品の摺動面近くから中空軸の内周
面近くまで伸びるように油供給孔内に銅製パイプを挿入
してもよい。このようにして１伺けられたカムシャフト
は所定の焼結温度で焼結することによって部品か強固に
なるとともに、圧粉体内から溶融浸出するＣｕが半休部
品同志の間隙及び部品と中空軸の間隙に侵入凝固して、
部品と中空軸とを一体化結合させる。According to the method of the present invention, the camshaft is manufactured according to the following steps. As shown in Figures 2 to 5,
The powder of the sintered alloy for manufacturing parts containing Cu is compacted into a predetermined part shape (journal shape in the figure), but at this time, the part 4 is formed into two halves 4a and 4b, Each half-hole 4a, 4b is compacted to have a semi-cylindrical oil supply hole 6 (or 5) on one end face. The compression direction is AA' or BB' as indicated by the arrows in FIGS. 2 and 5. Third
The figure is a hemostatic diagram of FIG. 2 viewed from direction A, and FIG. 4 is a front view of FIG. 5 viewed from direction B. An oil supply hole is previously formed in the hollow shaft at a predetermined position corresponding to the oil supply hole of the component. The hollow shaft is usually made of steel. Next, as shown in FIG. 6, the oil supply holes 6, 4a, 4b,
The components 4 are assembled so that they are in precise contact with each other, and the oil supply holes 6 of the integrated component 4 are in communication with the steel hollow shaft 2, which has a separate oil supply hole formed therein. At this time, in order to fix the relative position of the component and the hollow shaft, a copper pipe may be inserted into the oil supply hole so as to extend from near the sliding surface of the component to near the inner peripheral surface of the hollow shaft. By sintering the camshaft in this way at a predetermined sintering temperature, the parts become stronger, and the Cu melting and leaching from the green compact is absorbed into the gaps between semi-dead parts and between the parts and the hollow shaft. It enters the gap and solidifies,
The parts and the hollow shaft are integrally connected.
焼結合金粉体はＣｕを１７〜３５重量％含有する鉄系固
相焼結材である。銅は純銅又は銅合金の形で固相焼結材
中に含有されるが、いずれにしても銅含有量として上記
の範囲にあることが必要であり、この銅の含有量が１７
重量％未満では部品と中空軸の結合が不十分となり、３
５重都％を越えて含有しても結合にそれほど寄与せず、
コスト増となり経済的に不利である。The sintered alloy powder is an iron-based solid phase sintered material containing 17 to 35% by weight of Cu. Copper is contained in the solid phase sintered material in the form of pure copper or copper alloy, but in any case, the copper content must be within the above range, and if the copper content is 17
If it is less than 3% by weight, the connection between the parts and the hollow shaft will be insufficient, resulting in
Even if it is contained in excess of 5%, it does not contribute much to binding,
This increases costs and is economically disadvantageous.
また固相焼結材はＣを含有するが、好ましい含有量は０
．５〜１．５重量％である。炭素の含有量が０．５重量
％未満ではフェライト悟が増加するため耐摩耗性が低下
し、１．５重量％を越えて含有すると炭化物が過多とな
り、加工性を害する。また、Ｍｎを０．５％以下で含有
させて強度、耐摩耗性を改善することも好ましい。In addition, the solid phase sintered material contains C, but the preferable content is 0.
．． It is 5 to 1.5% by weight. If the carbon content is less than 0.5% by weight, ferrite content increases and wear resistance decreases, while if the carbon content exceeds 1.5% by weight, carbides become excessive and workability is impaired. It is also preferable to improve strength and wear resistance by incorporating Mn in an amount of 0.5% or less.
本発明においては固相焼結材を中空軸に嵌合した後、焼
結することによって、Ｃｕが拡散移動することから焼結
材の空孔率を適宜定めることが必要であり、空孔率は１
０〜４０％の範囲にあることが望ましい。また焼結条件
は、１圃相焼結材中のＣｕが十分に溶融浸出する条件を
適宜遺択する必要がある、例えば、１１００−１２００
℃で３０〜１５０分焼結を行なう。In the present invention, it is necessary to appropriately determine the porosity of the sintered material because Cu diffuses and moves by sintering the solid phase sintered material after fitting it into the hollow shaft. is 1
It is desirable that it be in the range of 0 to 40%. In addition, the sintering conditions need to be appropriately selected so that the Cu in the 1-phase sintered material is sufficiently melted and leached.
Sintering is carried out for 30-150 minutes at <0>C.
〔発明の効果］
Ｌ記の通り、本発明の方法は、組付は部品の油供給孔を
機械加工で形成する従来の方法とは異なり、コストの高
い機械加工を施さずに油供給孔を形成することができる
から、カムシャフトの製造コストを大幅に低減させると
いう優れた効果を奏する。さらに、銅を拡敵させて組付
は部品とシャフトのみならず半割りの組付は部品同志も
結合させるので、結合の強度と信頼性も高い。[Effects of the Invention] As described in L, the method of the present invention is different from the conventional method in which the oil supply hole of the assembly part is formed by machining, and the method of the present invention allows the oil supply hole to be formed without performing expensive machining. Since it can be formed, it has the excellent effect of significantly reducing the manufacturing cost of the camshaft. Furthermore, since copper is used extensively to assemble not only the parts and the shaft, but also the parts when assembled in half, the strength and reliability of the joint is high.
第１図は本発明の方法により製造されたカムシャフトを
一部断面で示す側面図、第２図及び第３図は二分割され
たジャーナル部品の一方の半休の側面図及び油供給孔を
有する側の端面図、第４図及び第５図はカムシャフト部
品の他方の半休の第２図及び第３図に相当する図、第６
図はジャーナル部品を中空軸に組付けた状態の側面図、
＃１７図は第６図の■−■線に沿う断面図である。
団において、１はカムシャフト、２は中空軸、４は部品
、４ ａ 、 ｊｂは半休、６は油供給孔であるつ
出願人 日本ピストンリング株式会社
第１図
第２図第３図 第４図 第
］
ｌ
第６図 第７図
５図
Ｂ′
）ｂFIG. 1 is a partially sectional side view of a camshaft manufactured by the method of the present invention, and FIGS. 2 and 3 are half-closed side views of one half of a journal component divided into two parts, showing an oil supply hole. The side end views, FIGS. 4 and 5, correspond to FIGS. 2 and 3 of the other half of the camshaft component, and FIGS.
The figure is a side view of the journal component assembled to the hollow shaft.
Figure #17 is a sectional view taken along the line ■--■ in Figure 6. In the group, 1 is a camshaft, 2 is a hollow shaft, 4 is a part, 4 a and jb are half holes, and 6 is an oil supply hole. Applicant: Japan Piston Ring Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Fig.] l Fig. 6 Fig. 7 Fig. 5 B' ) b
Claims (1)
ぞれ圧粉成形する工程と、二つの前記半休の溝が合致し
て一つの油供給孔を形成するように組合わせて中空軸に
組付ける工程と、形成された前記油供給孔が前記中空軸
の油供給孔と連通ずるように前記組付は部品を前記中空
軸に接合する工程からなる方法において、前記組４＝Ｉ
け部品は銅を１７〜３５重量％含有する鉄系固相焼結材
からなり、前記中空軸に組付けられて焼結されると、銅
が溶融浸出して前記組付は部品と前記中空軸を一体化結
合させることを特徴とするカムシャフトの製造方法。 ２）鉄系焼結材の空孔率は１０〜４０％であることを特
徴とする特許請求の範囲第１項記載のカムシャフトの製
造方法。[Scope of Claims] l) Assembly involves the step of dividing the component into half-holes having grooves on the end faces and compacting each half, and the grooves of the two half-holes matching to form one oil supply hole. and a step of joining the parts to the hollow shaft so that the formed oil supply hole communicates with the oil supply hole of the hollow shaft, Said group 4=I
The parts are made of iron-based solid-phase sintered material containing 17 to 35% by weight of copper, and when assembled to the hollow shaft and sintered, the copper melts and leaches out, and the assembled parts and the hollow A method for manufacturing a camshaft, characterized by integrally connecting shafts. 2) The method for manufacturing a camshaft according to claim 1, wherein the iron-based sintered material has a porosity of 10 to 40%.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7388484A JPS60218402A (en) | 1984-04-14 | 1984-04-14 | Manufacture of cam shaft |
| GB08500496A GB2153850B (en) | 1984-02-07 | 1985-01-09 | Method of manufacturing a camshaft |
| US06/690,231 US4556532A (en) | 1984-02-07 | 1985-01-10 | Method for manufacturing camshaft |
| DE19853504212 DE3504212A1 (en) | 1984-02-07 | 1985-02-07 | METHOD FOR PRODUCING A CONTROL SHAFT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7388484A JPS60218402A (en) | 1984-04-14 | 1984-04-14 | Manufacture of cam shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60218402A true JPS60218402A (en) | 1985-11-01 |
| JPS648683B2 JPS648683B2 (en) | 1989-02-15 |
Family
ID=13531079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7388484A Granted JPS60218402A (en) | 1984-02-07 | 1984-04-14 | Manufacture of cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60218402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100398606B1 (en) * | 2001-04-10 | 2003-09-19 | 주식회사 서진캠 | Manufacturing method for cam and shaft |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55161006A (en) * | 1979-06-01 | 1980-12-15 | Hitachi Ltd | Setting method of sintered part in interconnected blined hole |
| JPS6039105A (en) * | 1983-08-13 | 1985-02-28 | Mitsubishi Metal Corp | Cam shaft and its production |
-
1984
- 1984-04-14 JP JP7388484A patent/JPS60218402A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55161006A (en) * | 1979-06-01 | 1980-12-15 | Hitachi Ltd | Setting method of sintered part in interconnected blined hole |
| JPS6039105A (en) * | 1983-08-13 | 1985-02-28 | Mitsubishi Metal Corp | Cam shaft and its production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100398606B1 (en) * | 2001-04-10 | 2003-09-19 | 주식회사 서진캠 | Manufacturing method for cam and shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS648683B2 (en) | 1989-02-15 |
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