JPH0478682B2 - - Google Patents
Info
- Publication number
- JPH0478682B2 JPH0478682B2 JP59019401A JP1940184A JPH0478682B2 JP H0478682 B2 JPH0478682 B2 JP H0478682B2 JP 59019401 A JP59019401 A JP 59019401A JP 1940184 A JP1940184 A JP 1940184A JP H0478682 B2 JPH0478682 B2 JP H0478682B2
- Authority
- JP
- Japan
- Prior art keywords
- journal
- stem
- copper
- camshaft
- steel
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 63
- 239000007790 solid phase Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- QPBIPRLFFSGFRD-UHFFFAOYSA-N [C].[Cu].[Fe] Chemical compound [C].[Cu].[Fe] QPBIPRLFFSGFRD-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 18
- 229910052802 copper Inorganic materials 0.000 description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000005219 brazing Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 244000273618 Sphenoclea zeylanica Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Gears, Cams (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はカムシヤフトの製造方法に関し、詳し
くはジヤーナルとして、銅を所定量含有する固相
焼結材からなる外側材とスチールからなる内側材
を用い、かつ該ジヤーナルに嵌合孔を設け、該ジ
ヤーナルを中空または中実のスチール製のステム
の所定位置に嵌合した後、炉中で焼結することに
より、ジヤーナルの外側材から溶出した銅によつ
てジヤーナルの外側材と内側材およびジヤーナル
の内側材とステムを強固に凝固結合せしめる、簡
便、かつ加工性に優れたカムシヤフトの製造方法
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a camshaft, and more specifically, the present invention relates to a method for manufacturing a camshaft, in particular, a journal comprising an outer material made of a solid-phase sintered material containing a predetermined amount of copper, and an inner material made of steel. Copper eluted from the outer material of the journal is produced by using the journal, providing a fitting hole in the journal, fitting the journal into a predetermined position of a hollow or solid steel stem, and then sintering it in a furnace. The present invention relates to a method for manufacturing a camshaft which is simple and has excellent workability, by which the outer and inner members of the journal and the inner member and the stem of the journal are firmly coagulated and bonded.
［従来の技術］
ジヤーナルをスキム、特に中空パイプに組み付
けることによつてカムシヤフトとしたものが種々
提案されており、従来の鋳造等による一体型のカ
ムシヤフトに比較して軽量、高性能なものが実現
している。[Prior art] Various camshafts have been proposed by assembling a journal into a skim, especially a hollow pipe, and these have achieved lighter weight and higher performance than conventional integrated camshafts made by casting, etc. are doing.
これらジヤーナルとステムとの結合手段として
は、鋳造、溶接、ろう付等があるが、これらの方
法は特殊技術の必要性や変形、歪みの発生、密着
度の不足等各々問題があり、さらに溶接機械の操
作、ろう材の配置作業等の工数が多く簡便な方法
とは言えない。 Casting, welding, brazing, etc. are available as methods for joining these journals and stems, but these methods have their own problems, such as the need for special techniques, deformation, distortion, and insufficient adhesion. It cannot be said to be a simple method as it requires a lot of man-hours such as operating the machine and arranging the brazing material.
別の方法として、液相焼結材によるジヤーナル
を銅製の中空パイプ等のステムに組み付けた後、
液相焼結材の収縮を利用して中空パイプ等のステ
ムに固着させたものがあり、特に耐摩耗性におい
て優れている。しかし、このカムシヤフトは高硬
度、高耐摩耗性であるゆえに、寸法仕上げのため
に摺動面の研削加工を行なう際に困難が生じると
いう加工上の問題がある。 Another method is to assemble a journal made of liquid-phase sintered material onto a stem such as a hollow copper pipe, and then
There are some that utilize the contraction of liquid phase sintered material to be fixed to the stem of a hollow pipe, etc., and are particularly excellent in wear resistance. However, since this camshaft has high hardness and high wear resistance, there is a processing problem in that it is difficult to grind the sliding surface to finish the dimensions.
［発明が解決しようとする課題］
本発明は、ステムにジヤーナルを簡便に取り付
け可能で、かつステムとジヤーナルの接着強度に
優れると共に、加工性に優れたカムシヤフトの製
造方法を提供することを目的とする。[Problems to be Solved by the Invention] An object of the present invention is to provide a method for manufacturing a camshaft that allows a journal to be easily attached to a stem, has excellent adhesive strength between the stem and journal, and has excellent workability. do.
［課題を解決するための手段］
本発明者等は、この目的に沿つて鋭意研究の結
果、ジヤーナルの外側材として固相焼結材を用
い、しかもこの固相焼結材中に特定量の銅を含有
させることによつて、ジヤーナルをステムに嵌合
させた後、炉中で焼結した際に、固相焼結材中の
銅が溶融浸出し、ジヤーナルの外側材と内側材お
よびジヤーナルの内側材とステムのそれぞれの間
隙に侵入して両者が凝固結合することを見出し、
この方法が上記目的を満足することを知見して本
発明に到達した。[Means for Solving the Problem] As a result of intensive research in line with this purpose, the present inventors used a solid phase sintered material as the outer material of the journal, and furthermore, the solid phase sintered material contained a specific amount of By including copper, when the journal is fitted to the stem and then sintered in a furnace, the copper in the solid phase sintered material melts and leaches out, forming the outer and inner materials of the journal and the journal. It was discovered that the material enters the gap between the inner material and the stem, and the two solidify and bond.
The present invention was achieved by discovering that this method satisfies the above objectives.
すなわち本発明は、Cuを17〜35重量％含有す
る銅−炭素−鉄系固相焼結材からなる外側材とス
チールからなる内側材とにより形成され、嵌合孔
を有するジヤーナルを、スチール製ステムに嵌合
組付けたのち、炉中で焼結することを特徴とする
カムシヤフトの製造方法にある。 That is, the present invention provides a journal formed of an outer material made of a copper-carbon-iron solid phase sintered material containing 17 to 35% by weight of Cu and an inner material made of steel, and having a fitting hole. A method of manufacturing a camshaft, which comprises fitting and assembling a camshaft to a stem and then sintering it in a furnace.
本発明においては、ジヤーナルとして外側材と
内側材とからなり、ジヤーナルの外側材として銅
を17〜35重量％含有する銅−炭素−鉄系固相焼結
材を用いる。なお、銅は純銅または銅合金のかた
ちで固相焼結剤中に含有されるが、いずれにして
も銅含有量として上記範囲にあることが必要であ
り、この固相焼結材中の銅の含有量が17重量％未
満ではジヤーナルの外側材と内側材またはジヤー
ナルの内側材とステムの結合が不充分となり、35
重量％を越えて含有してもジヤーナルの内側材と
外側材またはジヤーナルの内側材とステムの結合
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。また、本発明の外側材として使用する
固相焼結材は炭素を必須成分として含有するが、
好ましい含有量は0.6〜1.5重量％である。炭素の
含有量が0.6重量％未満ではフエライト量が増す
ので耐摩耗性が低下し、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、この固相焼結材中には任意成分としてMn，
Si，Ni，Mo等の元素が適宜含有され、強度、耐
摩耗性等の特性を調整することができ、その含有
量は通常0.2〜4.0重量％の範囲である。また、こ
の焼結材においては随伴不純物が微量含有される
ことは言うまでもない。本発明においてはジヤー
ナルをステムに嵌合後、焼結することによつて銅
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、外側材としての固相焼結材
の空孔率は好ましくは10〜40％の範囲にあること
が望ましい。 In the present invention, the journal is composed of an outer material and an inner material, and a copper-carbon-iron solid phase sintered material containing 17 to 35% by weight of copper is used as the outer material of the journal. Copper is contained in the solid phase sintering agent in the form of pure copper or copper alloy, but in any case, the copper content must be within the above range. If the content of
Even if the content exceeds the weight percent, it does not contribute much to the bonding between the inner and outer members of the journal or the inner member and the stem, which increases the cost and is economically disadvantageous. In addition, the solid phase sintered material used as the outer material of the present invention contains carbon as an essential component,
The preferred content is 0.6-1.5% by weight. If the carbon content is less than 0.6% by weight, the amount of ferrite increases, resulting in a decrease in wear resistance, and if the carbon content exceeds 1.5% by weight, carbide becomes excessive, impairing workability. In addition, this solid phase sintered material contains Mn,
Elements such as Si, Ni, and Mo are appropriately contained to adjust properties such as strength and wear resistance, and the content thereof is usually in the range of 0.2 to 4.0% by weight. Further, it goes without saying that this sintered material contains a trace amount of accompanying impurities. In the present invention, the porosity of the sintered material must be determined appropriately because copper diffuses and moves when the journal is sintered after fitting to the stem, and solid-phase sintering is used as the outer material. The porosity of the material is preferably in the range of 10 to 40%.
本発明において、ジヤーナルの内側材としてス
チールが用いられる。この内側材としてのスチー
ルは所望により種々のものが選択され、ステムと
同一の材質であつても異なつていても良い。 In the present invention, steel is used as the inner material of the journal. Various types of steel can be selected as the inner material as desired, and the material may be the same as or different from that of the stem.
この外側材および内側材のステムに対する厚さ
は特に制限はなく、適宜選択すれば良い。他方、
それぞれの軸方向に対する幅は、内側材の幅が外
側材の幅よりも小さいことが必要である。このよ
うに内側材の幅を小さくするのは、銅はスチール
中を溶融浸出せずに内側材外周を伝わつてステム
と内側材の間隔に侵入するためである。 The thickness of the outer material and the inner material relative to the stem is not particularly limited and may be selected as appropriate. On the other hand,
Regarding the widths in the respective axial directions, it is necessary that the width of the inner member is smaller than the width of the outer member. The reason why the width of the inner member is reduced in this manner is that copper does not melt and leach through the steel, but passes along the outer periphery of the inner member and invades the space between the stem and the inner member.
本発明においては、この外側材と内側材とを併
せてジヤーナルとする。このジヤーナルはステム
に嵌合すべく、嵌合孔を有する。この嵌合孔の内
径はステムの外径とほぼ同一で、ステムに密接し
て嵌合する径とすることが肝要である。 In the present invention, the outer material and the inner material are collectively referred to as a journal. This journal has a fitting hole for fitting into the stem. It is important that the inner diameter of this fitting hole is approximately the same as the outer diameter of the stem, so that it fits closely into the stem.
本発明にあつては、ジヤーナルをスチール製ス
テムの所望部分に嵌合させる。ステムは中空また
は中実のいずれであつても良い。ステムの好まし
いものとしては、例えばJIS STKM13に規定さ
れるＣ：0.17重量％、Si：0.14重量％、Mn：0.54
重量％、Ｐ：0.013重量％、Ｓ：0.004重量％およ
び残部鉄とからなる鉄鋼のパイプが例示される。 In the present invention, the journal is fitted into a desired portion of the steel stem. The stem can be either hollow or solid. Preferred stems include, for example, C: 0.17% by weight, Si: 0.14% by weight, Mn: 0.54 as specified in JIS STKM13.
An example is a steel pipe consisting of P: 0.013 wt%, S: 0.004 wt%, and the balance iron.
本発明においては、このようにジヤーナルをス
チール製ステムの所望部位に嵌合した後、炉中で
焼結する。焼結条件は、固相焼結材中の銅が充分
に溶融浸出する条件を適宜選択する必要があり、
例えば、1100〜1200℃、30〜150分焼結を行なう。 In the present invention, after the journal is fitted into a desired portion of the steel stem, it is sintered in a furnace. The sintering conditions must be selected appropriately so that the copper in the solid phase sintered material is sufficiently melted and leached.
For example, sintering is performed at 1100 to 1200°C for 30 to 150 minutes.
このように焼結することにより、銅は外側材と
しての固相焼結材より溶融浸出し、ジヤーナルの
外側材と内側材および内側材とステム間隙に侵入
し、凝固結合して両者を密に結合せしめる。 By sintering in this way, copper melts and leaches from the solid-phase sintered material serving as the outer material, enters the gap between the outer material and the inner material of the journal, and the inner material and the stem, solidifies and bonds, tightly bonding the two. to combine.
［実施例］
以下、本発明の実施例を図面に基づき詳細に説
明する。[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.
実施例
第１図は本発明により得られるカムシヤフトの
一実施例を示す縦断正面図、第２図は第１図のＡ
−A′縦断側面図である。Embodiment FIG. 1 is a longitudinal sectional front view showing one embodiment of a camshaft obtained by the present invention, and FIG.
−A′ is a longitudinal side view.
Cu20重量％、C1.0重量％、残部Feとを含む銅
−炭素−鉄系固相焼結材からなる外側材１とスチ
ールからなる内側材２とで形成された嵌合孔を有
するジヤーナル３を、スチール製中空ステム４の
所定位置に嵌合組付けした後、炉中焼結した。ジ
ヤーナル３の外側材１中から溶融浸出した銅は、
ジヤーナル３の外側材１と内側材２の間隙に侵入
すると同時に、内側材の側面２１を流れ、ジヤー
ナル３の内側材２とステム４の間隙に侵入し、そ
れぞれの間隙は毛細管現象によつて、銅が満遍な
く満たされて、銅が凝固することによりジヤーナ
ル３の外側材１と内側材２および内側材２とステ
ム４の結合が行なわれた。 A journal 3 having a fitting hole formed by an outer material 1 made of a copper-carbon-iron solid phase sintered material containing 20% by weight of Cu, 1.0% by weight of C, and the balance Fe, and an inner material 2 made of steel. After fitting and assembling the steel hollow stem 4 at a predetermined position, it was sintered in a furnace. The copper melted and leached from the outer material 1 of the journal 3 is
At the same time as it enters the gap between the outer material 1 and the inner material 2 of the journal 3, it flows along the side surface 21 of the inner material and enters the gap between the inner material 2 and the stem 4 of the journal 3, and each gap is closed by capillary action. The outer material 1 and the inner material 2 of the journal 3 and the inner material 2 and the stem 4 were joined together by filling the copper evenly and solidifying the copper.
［発明の効果］
以上のごとき本発明においては、以下のごとき
効果を奏する。[Effects of the Invention] The present invention as described above has the following effects.
：一般に含燐共晶（ステダイト）が生成するこ
とによつて高硬度となる液相焼結材に対し、
硬度の低い固相焼結材を用いたことによつて
加工性（切削性）が良好となつた。固相焼結
材中の炭素を含有するため、粒子間の拡散結
合、炭化物の形成等によりある程度の耐摩耗
性は保証される。:For liquid phase sintered materials that generally have high hardness due to the formation of phosphorus-containing eutectic (steadite),
By using a solid phase sintered material with low hardness, workability (cutting ability) was improved. Since the solid phase sintered material contains carbon, a certain degree of wear resistance is guaranteed due to diffusion bonding between particles, formation of carbides, etc.
：溶接機械の操作、ろう材の配置作業等の不要
な簡便な方法である。: This is a simple method that does not require the operation of welding machines or the placement of brazing metal.
：銅は約２重量％まで固相焼結材中に固溶し、
強度、耐摩耗性等の改善に寄与する。: Copper is dissolved in solid phase sintered material up to about 2% by weight,
Contributes to improvements in strength, wear resistance, etc.
：ジヤーナルの一部である内側材にスチールを
用いているため、銅の使用量が少くて済むの
で経済的に安価である。:Since steel is used for the inner material, which is part of the journal, less copper is used, making it economically inexpensive.
第１図は本発明により得られるカムシヤフトの
一実施例を示す縦断正面図、第２図は、第１図の
Ａ−A′縦断側面図。
１……外側材、２……内側材、３……ジヤーナ
ル、４……ステム、２２……内側材側面。
FIG. 1 is a longitudinal sectional front view showing one embodiment of a camshaft obtained by the present invention, and FIG. 2 is a longitudinal sectional side view taken along line A-A' in FIG. 1... Outer material, 2... Inner material, 3... Journal, 4... Stem, 22... Inner material side surface.
Claims (1)
固相焼結材からなる外側材とスチールからなる内
側材とにより形成され、嵌合孔を有するジヤーナ
ルを、スチール製ステムに嵌合組付けたのち、炉
中で焼結することを特徴とするカムシヤフトの製
造方法。 ２ 前記外側材の軸方向幅が内側材の軸方向幅よ
りも大きいことを特徴とする前記特許請求の範囲
第１項記載のカムシヤフトの製造方法。[Claims] 1. A journal formed of an outer material made of a copper-carbon-iron solid phase sintered material containing 17 to 35% by weight of Cu and an inner material made of steel, and having a fitting hole, A method for manufacturing a camshaft, which comprises fitting and assembling a camshaft to a steel stem and then sintering it in a furnace. 2. The method of manufacturing a camshaft according to claim 1, wherein the axial width of the outer member is larger than the axial width of the inner member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1940184A JPS60165307A (en) | 1984-02-07 | 1984-02-07 | Preparation of cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1940184A JPS60165307A (en) | 1984-02-07 | 1984-02-07 | Preparation of cam shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60165307A JPS60165307A (en) | 1985-08-28 |
| JPH0478682B2 true JPH0478682B2 (en) | 1992-12-11 |
Family
ID=11998242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1940184A Granted JPS60165307A (en) | 1984-02-07 | 1984-02-07 | Preparation of cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60165307A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT382334B (en) * | 1985-04-30 | 1987-02-10 | Miba Sintermetall Ag | CAMS FOR SHRINKING ON A CAMSHAFT AND METHOD FOR PRODUCING SUCH A CAM BY SINTERING |
| AT395688B (en) * | 1991-02-13 | 1993-02-25 | Miba Sintermetall Ag | METHOD FOR PRODUCING A MOLDED PART BY SINTERING |
| JP3346305B2 (en) * | 1998-07-17 | 2002-11-18 | 三菱マテリアル株式会社 | High strength iron-based sintered alloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039105A (en) * | 1983-08-13 | 1985-02-28 | Mitsubishi Metal Corp | Cam shaft and its production |
-
1984
- 1984-02-07 JP JP1940184A patent/JPS60165307A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039105A (en) * | 1983-08-13 | 1985-02-28 | Mitsubishi Metal Corp | Cam shaft and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60165307A (en) | 1985-08-28 |
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