JPS6033303A - Preparation of cam shaft - Google Patents
Preparation of cam shaftInfo
- Publication number
- JPS6033303A JPS6033303A JP14096783A JP14096783A JPS6033303A JP S6033303 A JPS6033303 A JP S6033303A JP 14096783 A JP14096783 A JP 14096783A JP 14096783 A JP14096783 A JP 14096783A JP S6033303 A JPS6033303 A JP S6033303A
- Authority
- JP
- Japan
- Prior art keywords
- cam
- parts
- camshaft
- liquid phase
- phase sintering
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/025—Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Gears, Cams (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野）
本発明は鋼製の中実又は中空のカム軸に別途製作した焼
結合金製のカム、ジャーナル等の組付は部品を装着し、
その組付は部品を液相焼結によりカム軸に固着する焼結
組立て式のカムシャフト製造方法に関するものである。[Detailed Description of the Invention] <Industrial Application Fields> The present invention is a method for assembling parts such as cams and journals made of a separately manufactured sintered alloy onto a solid or hollow steel camshaft.
The assembly relates to a sinter assembly type camshaft manufacturing method in which parts are fixed to the camshaft by liquid phase sintering.
（従来技術〉
焼結合金製のカム、ジャーナル等の組付は部品は、先ず
、粉末合金をプレス成形した圧粉体として製作され、次
に、直接又は仮焼結後に鋼製のカム軸に嵌着され、つい
で、液相焼結によりカム軸に接合される。粉末合金を圧
粉体にプレス成形したと、き、プレスの上パンチと下パ
ンチに近い圧粉体の両側の部分の密度は高く、中央の部
分の密度は低くなる。従来、このような圧粉体の組付は
部品を直接又は仮焼結して鋼製のカム軸に装着し、つい
で液相焼結してカム軸に一体に接合していたが、密度差
の影響から組付は部品の外周面は中央部分が凹んで両側
部分が突出するため、凹曲面状になるという欠点があっ
た。この凹曲面状になった組付は部品の外周面は修正の
ための加工が必要であり、これがコスト高をまねいてい
た。(Prior art) When assembling cams, journals, etc. made of sintered alloy, the parts are first manufactured as compacts by press-forming powder alloy, and then attached to steel camshafts either directly or after pre-sintering. It is fitted and then joined to the camshaft by liquid phase sintering.When the powder alloy is press-formed into a compact, the density of the parts on both sides of the compact close to the upper and lower punches of the press increases. The density is high, and the density in the central part is low. Conventionally, the assembly of such compacts involves attaching the parts directly or pre-sintering to a steel camshaft, and then liquid-phase sintering the camshaft. It was integrally joined to the shaft, but due to the difference in density, the outer peripheral surface of the part had the disadvantage that the center part was concave and the sides protruded, resulting in a concave curved surface.This concave curved shape In order to assemble the parts, the outer peripheral surfaces of the parts needed to be modified, which led to high costs.
〈発明の目的〉
本発明の目的は焼結合金製の組付は部品を液相焼結した
ときに、その外周面が凹曲面にならない焼結組立て式カ
ムシャフトの製造方法を提供することにある。<Object of the Invention> The object of the present invention is to provide a method for manufacturing a sintered assembly type camshaft in which the outer peripheral surface does not become a concave curved surface when the parts are liquid-phase sintered. be.
〈発明の構成〉
前記目的を達成するため本発明の方法は組付は部品の両
側面に切欠部を形成した後にカム軸に装着して液相焼結
することを特徴とする。<Structure of the Invention> In order to achieve the above object, the method of the present invention is characterized in that, in assembly, notches are formed on both sides of the parts, and then the parts are mounted on the camshaft and subjected to liquid phase sintering.
両側面に切欠部が形成された組付は部品のをカム軸に装
着して液相焼結すると、中央部分は密度が低いために凹
むが、両側部分も液相焼結に伴う収縮力により内周側の
切欠部にたわみ込む状態となるから、外周面は全体とし
て平坦となり凹曲面は生じない。When assembling parts with notches formed on both sides, when the parts are attached to the camshaft and subjected to liquid phase sintering, the central part will be depressed due to its low density, but both sides will also be depressed due to the shrinkage force caused by liquid phase sintering. Since it is bent into the notch on the inner circumferential side, the outer circumferential surface is flat as a whole and no concave curved surface is formed.
切欠部は仮焼結した焼結合金製組付は部品に機械加工を
施して形成するか、又は焼結合金製組付は部品の圧粉体
製造時にプレス成形によって切欠部を成形する。プレス
成形によって切欠部を形成した圧粉体は、機械加工が不
要であるだけでなく、中央部分の密度が高くなるので、
機械加工のものよりも数段優れている。The notch is formed by machining the part in the case of a pre-sintered sintered alloy assembly, or is formed by press forming during the production of the green compact of the part in the case of a sintered alloy assembly. A compacted powder with notches formed by press forming not only does not require machining, but also has a high density in the center.
Much better than machined ones.
〈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図に示す焼結組立て式カムシャフトは鋼製中空軸の
カム軸１０と別途製作された焼結合金のカム２０とジャ
ーナル３０からなりカム２０とジャーナル３０はカム軸
１０に嵌着された後に液相焼結によりカム軸１０に固着
される。The sintered assembly type camshaft shown in FIG. 1 consists of a hollow steel camshaft 10, a separately manufactured sintered alloy cam 20, and a journal 30, and the cam 20 and journal 30 are fitted onto the camshaft 10. Later, it is fixed to the camshaft 10 by liquid phase sintering.
第２図に示すように、鋼管のカム軸１０に嵌着されたカ
ム２０の両側面に切欠部２２が形成される。切欠部２２
はカム側面と相似形の一様な深さの溝状に形成され、両
側部分２１は外周面２３に沿って縁状に残される。例え
ば、カム軸の外径が２６．５ｍｍ、カム軸の外周面の幅
が１１．５ｍｍの場合、切欠部は深さ１．５ｍｍの溝と
して形成され、縁状に残る外周面の幅は３ａ＋ｍとなる
。切欠部２２はカム２０の圧粉体がプレス成形されると
きに同時にプレス成形しで設けるか、又は、矩形断面に
プレス成形した圧粉体を仮焼結した後に機械加工により
設ける。As shown in FIG. 2, notches 22 are formed on both sides of the cam 20 fitted onto the camshaft 10 of a steel tube. Notch 22
is formed in the shape of a groove with a uniform depth similar to the side surface of the cam, and both side portions 21 are left in the shape of an edge along the outer circumferential surface 23. For example, if the outer diameter of the camshaft is 26.5 mm and the width of the outer circumferential surface of the camshaft is 11.5 mm, the notch is formed as a groove with a depth of 1.5 mm, and the width of the outer circumferential surface remaining in the shape of an edge is 3a + m. becomes. The cutout portion 22 is provided by press forming at the same time when the green compact of the cam 20 is press-formed, or by machining after pre-sintering the green compact press-formed into a rectangular cross section.
第２図のカムを液相焼結すると、第３図に示すように、
密度の低い中央部分が凹むが、両側部分２１は内周面の
切欠部２２へたれ込む。したがって、カム２０の外周面
は中央と両側が凹んだ形になるが、その高低差は、従来
の凹曲面に比べるとわずかであり、そのままでも使用で
きる。たとえ、機械加工で平坦に修正するとしても、そ
の手間は極くわずかである。When the cam shown in Fig. 2 is liquid-phase sintered, as shown in Fig. 3,
The central portion with low density is recessed, but the side portions 21 are retracted into the notch portions 22 on the inner circumferential surface. Therefore, although the outer circumferential surface of the cam 20 has a concave shape at the center and both sides, the difference in height is small compared to a conventional concave curved surface, and the cam 20 can be used as is. Even if the flatness is corrected by machining, the effort required is extremely small.
第４図に示すように、カム２０の両側部分が外周面２３
とカム軸１０に沿って縁状に残るように切欠部２２を形
成してもよい。この切欠部の効果は第２図のものと全く
同じである。As shown in FIG. 4, both sides of the cam 20
The notch 22 may be formed so as to remain in the shape of an edge along the camshaft 10. The effect of this cutout is exactly the same as that in FIG.
切欠部の溝の深さは必ずしも一様にする必要はなく、第
５図に示すように、カム２０の外周面２３の両側縁から
、又は第６図に示すように、カム２０の外周面２３に沿
う縁状の両側部分２１からカム軸１０に向かって溝の、
深さが連続的に増加する切欠部２２を形成し、カム２０
の断面を台形状にしてもよい。この切欠部の効果も第２
図のものと実質的に同一である。The depth of the groove of the notch does not necessarily have to be uniform, and as shown in FIG. 23 of the groove from the edge-shaped both sides 21 toward the camshaft 10.
A notch 22 whose depth continuously increases is formed, and the cam 20
The cross section may be trapezoidal. The effect of this notch is also second to none.
It is substantially the same as that shown.
切欠部はカム外周面が液相焼結により凹曲面化すること
を防１ヒするだけでなく、肉をぬすむことによりカム自
体の軽量化にも役立つという効果がある。The notch not only prevents the outer circumferential surface of the cam from becoming a concave surface due to liquid phase sintering, but also has the effect of reducing the weight of the cam itself by removing the flesh.
〈発明の効果〉
上記の通り、本発明の方法は、液相焼結により焼結合金
製のカム、ジャーナル等の組付は部品をカム軸に接合し
たときに、組付は部品の外周面が軸方向に大きく凹む従
来の方法とは異なり、組付は部品の外周面は軸方向に平
坦性を維持するという優れた効果を有する。<Effects of the Invention> As described above, the method of the present invention is capable of assembling sintered metal cams, journals, etc. by liquid phase sintering when the parts are joined to the camshaft. Unlike the conventional method in which the parts are largely concave in the axial direction, the assembly has the excellent effect that the outer circumferential surface of the part maintains flatness in the axial direction.
第１図は焼結合金製のカムとジャーナルをカム軸に組付
けた組立て式カムシャフトの斜視図、第２図は本発明の
一実施例の圧粉成形体が装着された液相焼結前のカムシ
ャフトの要部断面図、第３図は第２図のカムシャフトの
液相焼結後の要部断面図、第４図ないし第６図はそれぞ
れ別の実施例の第２図に相当する図である。
図において、１０はカム軸、２０はカム、２２は切欠部
、３０はジャーナルである。
出願人 日本ピストンリング株式会社Fig. 1 is a perspective view of an assembled camshaft in which a cam and journal made of sintered alloy are assembled to the camshaft, and Fig. 2 is a liquid phase sintered camshaft equipped with a powder compact according to an embodiment of the present invention. 3 is a cross-sectional view of the main part of the camshaft shown in Fig. 2 after liquid phase sintering, and Figs. 4 to 6 are the same as Fig. 2 of a different embodiment. FIG. In the figure, 10 is a camshaft, 20 is a cam, 22 is a notch, and 30 is a journal. Applicant Nippon Piston Ring Co., Ltd.
Claims (1)
焼結して前記焼結合金製組付は部品を前記カム軸に固着
するカムシャフトの製造方法において、前記焼結合金製
組付は部品を前記カム軸に装着する前に前記焼結合金製
組付は部品の両側面に切欠部を形成することを特徴とす
るカムシャフト・の製造方法。 ２）焼結合金製組付は部品のプレス成形時に切欠部をプ
レスして形成す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。 ３）仮焼結した焼結合金製組付は部品に機械加工を施し
て切欠部を形成す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。[Claims] 1) A method for manufacturing a camshaft in which the sintered metal assembly involves fixing the parts to the camshaft by liquid phase sintering after mounting the parts on the camshaft. A method for manufacturing a camshaft, characterized in that the sintered metal assembly includes forming notches on both sides of the sintered metal assembly before mounting the component on the camshaft. 2) Claim 1, characterized in that the sintered metal assembly is formed by pressing a notch during press molding of the parts.
The method for manufacturing the camshaft described in Section 1. 3) The method of manufacturing a camshaft according to claim 1, wherein the pre-sintered sintered alloy is assembled by machining the parts to form a notch.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14096783A JPS6033303A (en) | 1983-08-03 | 1983-08-03 | Preparation of cam shaft |
| DE19843490388 DE3490388T1 (en) | 1983-08-03 | 1984-03-23 | Control shaft and process for its manufacture |
| GB08506984A GB2156470A (en) | 1983-08-03 | 1984-03-23 | Cam shaft and method of manufacturing thereof |
| PCT/JP1984/000125 WO1985000865A1 (en) | 1983-08-03 | 1984-03-23 | Cam shaft and method of manufacturing thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14096783A JPS6033303A (en) | 1983-08-03 | 1983-08-03 | Preparation of cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6033303A true JPS6033303A (en) | 1985-02-20 |
Family
ID=15280984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14096783A Pending JPS6033303A (en) | 1983-08-03 | 1983-08-03 | Preparation of cam shaft |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS6033303A (en) |
| DE (1) | DE3490388T1 (en) |
| GB (1) | GB2156470A (en) |
| WO (1) | WO1985000865A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01141216A (en) * | 1987-10-02 | 1989-06-02 | Emitec G Fuer Emissions Technol Mbh | Driving shaft fixing drive element as group |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH670137A5 (en) * | 1985-03-06 | 1989-05-12 | Fischer Ag Georg | METHOD FOR PRODUCING A COMPOSITE CAMSHAFT. |
| IT1187909B (en) * | 1986-02-14 | 1987-12-23 | Fiat Auto Spa | COMPOSITE DISTRIBUTION SHAFT FOR INTERNAL COMBUSTION ENGINES AND PROCEDURE FOR ITS REALIZATION |
| CN105781650A (en) * | 2016-04-18 | 2016-07-20 | 重庆长安汽车股份有限公司 | Cam shaft with cam comprising weight reduction structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829588A (en) * | 1981-07-20 | 1983-02-21 | Toyota Motor Corp | Joining method for shaft member and fitting member |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5610859A (en) * | 1979-07-04 | 1981-02-03 | Nippon Piston Ring Co Ltd | Cam shaft |
| JPS5841211A (en) * | 1981-09-04 | 1983-03-10 | Nippon Piston Ring Co Ltd | Cam shaft |
-
1983
- 1983-08-03 JP JP14096783A patent/JPS6033303A/en active Pending
-
1984
- 1984-03-23 DE DE19843490388 patent/DE3490388T1/en not_active Withdrawn
- 1984-03-23 WO PCT/JP1984/000125 patent/WO1985000865A1/en active Application Filing
- 1984-03-23 GB GB08506984A patent/GB2156470A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829588A (en) * | 1981-07-20 | 1983-02-21 | Toyota Motor Corp | Joining method for shaft member and fitting member |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01141216A (en) * | 1987-10-02 | 1989-06-02 | Emitec G Fuer Emissions Technol Mbh | Driving shaft fixing drive element as group |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2156470A (en) | 1985-10-09 |
| WO1985000865A1 (en) | 1985-02-28 |
| GB8506984D0 (en) | 1985-04-24 |
| DE3490388T1 (en) | 1985-10-03 |
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