JP2009167482A - Method for producing connecting rod, and connecting rod - Google Patents

Method for producing connecting rod, and connecting rod Download PDF

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JP2009167482A
JP2009167482A JP2008008070A JP2008008070A JP2009167482A JP 2009167482 A JP2009167482 A JP 2009167482A JP 2008008070 A JP2008008070 A JP 2008008070A JP 2008008070 A JP2008008070 A JP 2008008070A JP 2009167482 A JP2009167482 A JP 2009167482A
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connecting rod
material powder
small end
separator
large end
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Kiyoshi Higashiyama
潔 東山
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a connecting rod in which the strength of a column part is increased, and whose thinning and lightening are possible while maintaining the rigidity and machinability of a large end part and a small end part, and to provide a connecting rod. <P>SOLUTION: The method for producing a connecting rod is characterized in that a column part, a large end part and a small end part in the cavity of a molding die are partitioned by a separator checking the movement of material powder, and the column part is packed with the material powder having strength higher than the material powder packed into the large end part and the small end part. The separator is composed of a plurality of slits narrower than the grain size of the material powder and elongating to the compressing direction, and is composed of Cu or Ag or Sn. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明はコンロッドの製造方法とコンロッドに関する。より詳しくは、材料粉末を燒結鍛造して形成する焼結コンロッドとその製造方法に関する。   The present invention relates to a connecting rod manufacturing method and a connecting rod. More specifically, the present invention relates to a sintered connecting rod formed by sintering forging material powder and a method for manufacturing the same.

周知のようにコンロッドは、レシプロエンジンのピストンをクランクシャフトに連結するための部材であり、クランクシャフト用孔を有する大端部とピストンピン用孔を有する小端部とこれらを連接するコラム部とからなっている。コンロッドは、所定の剛性と疲労強度を有するとともに軽量であることが要求される部材であり、大端部や小端部では高剛性で良好な被削性が必要であり、コラム部については高強度化による薄肉軽量化が要求されている。   As is well known, the connecting rod is a member for connecting the piston of the reciprocating engine to the crankshaft, and includes a large end portion having a crankshaft hole, a small end portion having a piston pin hole, and a column portion connecting these. It is made up of. The connecting rod is a member that has a predetermined rigidity and fatigue strength and is required to be lightweight, and requires a high rigidity and good machinability at the large and small ends. Thinning and weight reduction by strengthening is required.

特許文献１では、この相反する要求を一種類の合金粉末で満たす焼結コンロッドの製造方法を提案している。すなわち、圧粉体成形工程で、圧粉体のコラム部となる部分の密度を大端部と小端部となる部分の密度より低く成形し、この圧粉体に焼結工程で浸炭処理などの表面硬化処理を施す方法である。この従来技術によれば、密度の低いコラム部は密度の高い大・小端部よりも深部まで浸炭処理されるため、被削性が要求される大端部と小端部を硬化させることなく、強度が要求されるコラム部をのみを硬化できるとしている。しかし、この相反する要求を一種類の合金粉末で満たすには限界があり、強度が要求されるコラム部について必ずしも満足できる特性が得られない場合があった。
特開２００７−２８４７６９号公報 Patent Document 1 proposes a method of manufacturing a sintered connecting rod that satisfies the conflicting requirements with one kind of alloy powder. That is, in the green compact molding process, the density of the part that becomes the column part of the green compact is formed lower than the density of the part that becomes the large end part and the small end part, and the green compact is carburized in the sintering process. This is a method of performing a surface hardening treatment. According to this prior art, the low-density column part is carburized to a deeper part than the high-density large and small end parts, so that the large and small end parts that require machinability are not hardened. It is said that only the column portion where strength is required can be cured. However, there is a limit to satisfying these conflicting requirements with one kind of alloy powder, and there are cases where satisfactory characteristics cannot always be obtained for the column portion that requires strength.
JP 2007-284769 A

本発明は、上記の問題を解決するためになされたものであり、大端部と小端部の剛性と被削性とを保持しながら、コラム部の強度を高くして薄肉軽量化できるコンロッドの製造方法とコンロッドを提供することを課題とする。   The present invention has been made to solve the above-described problem, and is a connecting rod that can reduce the thickness and weight by increasing the strength of the column portion while maintaining the rigidity and machinability of the large end portion and the small end portion. It is an object to provide a manufacturing method and a connecting rod.

本発明のコンロッドの製造方法は、金型のキャビティに材料粉末を充填する粉末充填工程と、充填された該材料粉末を加圧して圧粉体を形成する加圧成形工程と、該圧粉体を焼結鍛造してコンロッド粗材を形成する焼結鍛造工程と、を有する大端部と小端部と該大端部と該小部端とを連接するコラム部とを有するコンロッドの製造方法であって、前記粉末充填工程では、前記キャビティの前記コラム部に対応するコラム部領域と、前記大端部に対応する大端部領域および前記小端部に対応する小端部領域とを前記材料粉末の移動を阻止するセパレータで区画し、該コラム部領域には該大端部領域と該小端部領域とへ充填する材料粉末よりも高強度の材料粉末を充填し、前記セパレータは、前記加圧成形工程において該材料粉末の流動に応じて変形し、かつ前記焼結鍛造工程において溶融又は分解するものであることを特徴とする。   The connecting rod manufacturing method of the present invention includes a powder filling step of filling a mold cavity with material powder, a pressure forming step of pressing the filled material powder to form a green compact, and the green compact And a forging step for forming a connecting rod coarse material by sintering and forging a method of manufacturing a connecting rod having a large end portion, a small end portion, and a column portion connecting the large end portion and the small end. In the powder filling step, a column region corresponding to the column portion of the cavity, a large end region corresponding to the large end, and a small end region corresponding to the small end are Partitioned by a separator that prevents the movement of the material powder, the column region is filled with a material powder that is stronger than the material powder that fills the large end region and the small end region, According to the flow of the material powder in the pressure molding step And form, and is characterized in that the melted or decomposed said sintering forging process.

本発明のコンロッドの製造方法において、前記セパレータは、前記材料粉末の粒径よりも狭幅で圧縮方向に延在する複数のスリットで構成されており、その材料は、Ｃｕ、Ａｇ、Ｓｎのうちの何れかであることが望ましい。   In the connecting rod manufacturing method of the present invention, the separator is composed of a plurality of slits that are narrower than the particle diameter of the material powder and extend in the compression direction, and the material is made of Cu, Ag, or Sn. It is desirable that it is either.

また、前記キャビティの前記コラム部領域に充填される材料粉末は、少なくともＣｕ、Ｍｏ、Ｎｉのうちの１種以上を含むＦｅ−Ｃ系合金粉末であることが望ましい。   The material powder filled in the column region of the cavity is desirably an Fe—C alloy powder containing at least one of Cu, Mo, and Ni.

本発明のコンロッドは、大端部と、小端部と、該大端部と該小部端とを連接するコラム部とを一体的に焼結形成したコンロッドであって、前記コラム部は、前記大端部及び前記小端部を形成する材料粉末よりも高強度の材料粉末を用いて形成されていることを特徴とする。   The connecting rod of the present invention is a connecting rod in which a large end portion, a small end portion, and a column portion connecting the large end portion and the small portion end are integrally formed by sintering. It is formed by using a material powder having a strength higher than that of the material powder forming the large end and the small end.

本発明によれば、コラム部と大・小端部とを組成の異なる材料粉末を用いて一体的に燒結することができるので、高強度を有するコラム部と高い剛性と良好な被切削性を有する大・小端部とからなる薄肉軽量化可能のコンロッドを得ることができる。   According to the present invention, the column portion and the large and small end portions can be integrally sintered using material powders having different compositions, so that the column portion having high strength, high rigidity, and good machinability are obtained. A connecting rod that can be reduced in thickness and weight can be obtained.

また、本発明に係るセパレータは、材料粉末の粒径よりも狭い隙間のスリットで構成されているので、セパレータを介してコラム部領域の材料粉末と大・小端部領域の材料粉末が混じり合うことがない。また、スリットは、成形工程における圧縮方向に延在するように形成されているので、セパレータは加圧による材料粉末の塑性変形や流動に追随して変形することができる。従って、材料粉末をセパレータとともに緻密化できるので、圧粉体における組成の異なる材料粉末間の境界部の強度を他の部位と同等にすることができる。   Further, since the separator according to the present invention is configured with a slit having a gap narrower than the particle size of the material powder, the material powder in the column region and the material powder in the large and small end regions are mixed with each other through the separator. There is nothing. Further, since the slit is formed so as to extend in the compression direction in the molding process, the separator can be deformed following plastic deformation and flow of the material powder due to pressurization. Therefore, since the material powder can be densified together with the separator, the strength of the boundary portion between the material powders having different compositions in the green compact can be made equal to other parts.

また、セパレータはＣｕ、Ａｇ、Ｓｎなどの焼結温度よりも融点の低い素材で形成されているので、セパレータ成分は燒結鍛造工程で材料粉末中に溶融、拡散もしくは分解、消滅してしまい境界部の強度を低下させることはない。従って、コラム部と大・小端部との境界部における組成の異なる材料粉末の接合強度が安定したコンロッドを得ることができる。   In addition, since the separator is made of a material having a melting point lower than the sintering temperature, such as Cu, Ag, Sn, etc., the separator component melts, diffuses, decomposes or disappears in the material powder in the sintering forging process. It does not reduce the strength. Accordingly, it is possible to obtain a connecting rod in which the bonding strength of the material powders having different compositions at the boundary portion between the column portion and the large and small end portions is stable.

本発明のコンロッドの製造方法は、粉体成形時に成形金型の所定位置にセパレータを装着することと、組成の異なる複数の材料粉末を用いること以外は従来と同様に実施することができる。従って、従来のラインを大幅に変更することなく容易に適用することができ、生産性を阻害することがない。   The manufacturing method of the connecting rod of the present invention can be carried out in the same manner as before except that a separator is mounted at a predetermined position of a molding die during powder molding and a plurality of material powders having different compositions are used. Therefore, the conventional line can be easily applied without drastically changing, and productivity is not hindered.

本発明のコンロッドの製造方法は、金型のキャビティに材料粉末を充填する粉末充填工程と、充填された材料粉末を加圧して圧粉体を形成する加圧成形工程と、圧粉体を焼結し直ちに鍛造する焼結鍛造工程とを備えている。   The connecting rod manufacturing method of the present invention includes a powder filling step of filling a mold cavity with material powder, a pressure forming step of pressing the filled material powder to form a green compact, and sintering the green compact. And a sintering forging step of immediately forging and forging.

本発明の好適な実施の形態を、図を参照しながら説明する。図１は、本実施形態に係る成形金型１を模式的に示す平面図である。図２は、セパレータの一例を示す模式図である。   A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view schematically showing a molding die 1 according to the present embodiment. FIG. 2 is a schematic diagram illustrating an example of a separator.

成形金型１にはコンロッドの外形に対応するキャビティ１０が形成されている。キャビティ１０はコンロッドの大端部に対応する大端部領域１２と小端部に対応する小端部領域１６、およびコラム部に対応するコラム部領域１４とからなっている。大端部領域１２とコラム部領域１４との境界部、及びコラム部領域１４と小端部領域１６との境界部には、セパレータ２を配置する溝１８、１８が設けられている。   A cavity 10 corresponding to the outer shape of the connecting rod is formed in the molding die 1. The cavity 10 includes a large end region 12 corresponding to the large end portion of the connecting rod, a small end region 16 corresponding to the small end portion, and a column portion region 14 corresponding to the column portion. Grooves 18 and 18 for disposing the separator 2 are provided at the boundary between the large end region 12 and the column region 14 and at the boundary between the column region 14 and the small end region 16.

粉末充填工程では、まずこの成形金型１の溝１８、１８にそれぞれセパレータ２、２を立設して、キャビティ１０を大端部領域１２、コラム部領域１４、小端部領域１６に区画する。次に、それぞれの領域に所望の材料粉末を充填する。例えば、コラム部領域１４には強度を高めて薄肉軽量化を可能にするために、Ｆｅ−Ｃ系粉末にＣｕ、Ｎｉ、Ｍｏなどを添加したＦｅ−Ｃ系合金粉末を充填する。また、大端部領域１２と小端部領域１６には高剛性と良好な被削性を得るために、粉末の圧縮性に優れ、硬さの高くない低ＣのＦｅ−Ｃ系粉末を充填する。   In the powder filling process, first, separators 2 and 2 are provided upright in the grooves 18 and 18 of the molding die 1 to divide the cavity 10 into a large end region 12, a column region 14 and a small end region 16. . Next, a desired material powder is filled in each region. For example, the column region 14 is filled with Fe—C based alloy powder obtained by adding Cu, Ni, Mo or the like to the Fe—C based powder in order to increase the strength and reduce the thickness and weight. Further, in order to obtain high rigidity and good machinability, the large end region 12 and the small end region 16 are filled with a low C Fe—C-based powder having excellent powder compressibility and not high hardness. To do.

加圧成形工程では、この充填した材料粉末をセパレータ２、２とともに加圧して圧粉体を形成する。   In the pressure molding step, the filled material powder is pressed together with the separators 2 and 2 to form a green compact.

焼結鍛造工程では、この圧粉体を所定の温度に昇温保持後焼結鍛造して焼結鍛造体（コンロッド粗材）とする。さらに、得られたコンロッド粗材にコイニング、ショットブラスト処理および加工を施して所望のコンロッドを得ることができる。   In the sintering forging step, the green compact is heated and held at a predetermined temperature, and then sintered and forged to obtain a sintered forged body (a connecting rod coarse material). Furthermore, the desired connecting rod can be obtained by subjecting the obtained connecting rod crude material to coining, shot blasting and processing.

ここで、セパレータ２は、Ｃｕ、ＡｇあるいはＳｎなどよりなる箔又は薄板２２に、複数の縦長の隙間（以後、スリットという）２４を形成したものとするとよい。このように形成されるセパレータ２は、加圧成形工程において、隣り合う材料粉末同士が混合しないように区画しつつ、材料粉末の塑性変形や流動に追随して変形することができる。従って、材料粉末をセパレータとともに緻密化できるので、圧粉体におけるコラム部の材料粉末と大・小端部の材料粉末との境界部の強度を他の部位と同等にすることができる。   Here, the separator 2 may be formed by forming a plurality of vertically long gaps (hereinafter referred to as slits) 24 on a foil or thin plate 22 made of Cu, Ag, Sn, or the like. The separator 2 formed in this manner can be deformed following the plastic deformation and flow of the material powder while partitioning the adjacent material powders so as not to be mixed in the pressure forming step. Accordingly, since the material powder can be densified together with the separator, the strength of the boundary portion between the material powder at the column portion and the material powder at the large and small end portions in the green compact can be made equal to other portions.

境界部における材料粉末は、スリット２４を介して部分的に密着しているので、圧粉体を所定の温度に昇温保持することにより他の部位と同様に燒結することができる。また、圧粉体に埋設されたセパレータ２、２は、融点が焼結温度よりも低いＣｕ、ＡｇあるいはＳｎなどからなっているので、焼結鍛造工程における材料粉末の焼結過程で材料粉末中に拡散もしくは消失してしまい、焼結後にコラム部と大・小端部との境界部に残存することがない。従って、境界部の強度を低下させる原因とはならない。   Since the material powder at the boundary part is in close contact with each other through the slit 24, it can be sintered in the same manner as other parts by holding the green compact at a predetermined temperature. Further, since the separators 2 and 2 embedded in the green compact are made of Cu, Ag, Sn, or the like whose melting point is lower than the sintering temperature, Will not diffuse or disappear, and will not remain at the boundary between the column portion and the large and small end portions after sintering. Therefore, it does not cause a decrease in the strength of the boundary portion.

上記のようなセパレータ２において、その厚さは１〜１００μｍであることが望ましい。１μｍ未満ではスリットを形成することが困難であり、１００μｍを超えると材料粉末の緻密化を阻害することがあるので好ましくない。より好ましくは、１〜５０μｍである。また、スリット２４の幅ｗは材料粉末の最小粒径よりも狭く設定することが望ましく、例えば、５〜４０μｍとするとよい。スリット幅ｗが５μｍ未満では、境界部における材料粉末の緻密化が不十分となることがあり、４０μｍを超えて広いと、隣り合う材料粉末が混合することがあるので適当ではない。より好ましくは、２０〜３０μｍである。なお、スリット２４、２４間の間隔ａもスリット幅ｗに等しくするとよい。   In the separator 2 as described above, the thickness is desirably 1 to 100 μm. If it is less than 1 μm, it is difficult to form a slit, and if it exceeds 100 μm, densification of the material powder may be hindered. More preferably, it is 1-50 micrometers. The width w of the slit 24 is desirably set narrower than the minimum particle diameter of the material powder, and may be set to 5 to 40 μm, for example. If the slit width w is less than 5 μm, densification of the material powder at the boundary portion may be insufficient, and if it exceeds 40 μm, the adjacent material powder may be mixed, which is not appropriate. More preferably, it is 20-30 micrometers. It should be noted that the interval a between the slits 24 and 24 is preferably equal to the slit width w.

このように本実施形態に係るセパレータは、粉末充填工程および加圧成形工程では異なる材料粉末を的確に分離する分離機能に優れ、かつ焼結鍛造工程では溶融あるいは分解して消失するので組成の異なる焼結合金同士の高い接合強度を阻害することがない。従ってこのようなセパレータは、組成の異なる複数の材料粉末を用いたコンロッドの製造に好適である。   As described above, the separator according to this embodiment has an excellent separation function for accurately separating different material powders in the powder filling process and the pressure molding process, and is different in composition because it disappears by melting or decomposition in the sintering forging process. High joint strength between sintered alloys is not hindered. Therefore, such a separator is suitable for manufacturing a connecting rod using a plurality of material powders having different compositions.

（実施例）
厚さ０．０５ｍｍの銅箔（融点：１０８４．５℃）に幅ｗ：３０μｍのスリットを間隔ａ：５０μｍで複数形成したセパレータを用いて、金型キャビティのコラム部領域と大端部領域および小端部領域とを区画した。コラム部領域には材料粉末としてＦｅ−０．６Ｃ−２．５Ｃｕ−１．５Ｍｏを充填し、大端部領域および小端部領域にはＦｅ−０．５５Ｃ−２Ｃｕを充填した。なお、数値は材料粉末全体を１００とした時の当該成分粉末の配合比率（質量％）である。 (Example)
Using a separator in which a plurality of slits having a width w: 30 μm and a spacing a: 50 μm are formed in a copper foil (melting point: 1084.5 ° C.) having a thickness of 0.05 mm, the column region and the large end region of the mold cavity A small edge region was partitioned. The column part region was filled with Fe-0.6C-2.5Cu-1.5Mo as a material powder, and the large end region and the small end region were filled with Fe-0.55C-2Cu. In addition, a numerical value is the mixture ratio (mass%) of the said component powder when the whole material powder is set to 100.

次に、これらの材料粉末をセパレータともに、６ｔｏｎ／ｃｍ２で加圧成形して圧粉体を得た。続いて、得られた圧粉体を１１５０℃で１０分間保持した後直ちに鍛造して実施例のコンロッド粗材を得た。
（比較例）
セパレータを用いない１種類の材料粉末からなる従来のコンロッドである。実施例と同一形状の金型を用いそのキャビティに材料粉末としてＦｅ−０．５５Ｃ−２Ｃｕを充填した以外は、実施例と同様にして比較例のコンロッド粗材を得た。
（評価）
実施例のコンロッド粗材のコラム部の硬さはＨｖ４５０以上であり、強化成分、特にＭｏの添加による顕著な効果が認められた。また、大・小端部の硬さはＨｖ３００以下であり、従来と同様に良好な被削性を有していることが確認できた。 Next, these material powders were pressed together with a separator at 6 ton / cm 2 to obtain a green compact. Subsequently, the obtained green compact was held at 1150 ° C. for 10 minutes and immediately forged to obtain a connecting rod crude material of the example.
(Comparative example)
It is the conventional connecting rod which consists of one type of material powder which does not use a separator. A comparative connecting rod coarse material was obtained in the same manner as in the example except that a mold having the same shape as in the example was used and the cavity was filled with Fe-0.55C-2Cu as a material powder.
(Evaluation)
The hardness of the column part of the connecting rod coarse material of the example is Hv450 or more, and a remarkable effect by adding a reinforcing component, particularly Mo, was recognized. Further, the hardness of the large and small end portions was Hv300 or less, and it was confirmed that the machinability was good as in the conventional case.

実施例のコンロッドのコラム部の１０７回での疲労強度は４５０ＭＰａであり、比較例のコンロッドのコラム部の１０７回での疲労強度は３４０ＭＰａであった。 Fatigue strength at 10 7 times column portion of the connecting rod of the embodiment is 450 MPa, the fatigue strength at 10 7 times column portion of the connecting rod of the comparative example was 340 MPa.

以上の通り、コラム部に高強度の材料粉末を用いることで、実施例では従来のものに比べてコラム部の硬さを５０％以上、疲労強度を３０％以上向上することができた。従って、本実施例になるコンロッドは、従来のコンロッドよりもコラム部を薄肉化して軽量化可能であることが確認できた。なお、実施例のコンロッドにおいて、コラム部と大端部および小端部との境界部にセパレータの残存は認められなかった。   As described above, by using a high-strength material powder for the column portion, the hardness of the column portion can be improved by 50% or more and the fatigue strength can be improved by 30% or more in the embodiment as compared with the conventional one. Therefore, it was confirmed that the connecting rod according to the present example can be reduced in weight by reducing the thickness of the column portion compared to the conventional connecting rod. In the connecting rod of the example, no separator was observed at the boundary portion between the column portion and the large end portion and the small end portion.

本発明は上記の実施の形態や実施例に限定されるものではなく、本発明の主旨を逸脱しない範囲で変更することができる。   The present invention is not limited to the above-described embodiments and examples, and can be modified without departing from the gist of the present invention.

例えば、実施の形態では、金型キャビティのコラム部領域へ充填する材料粉末と大・小端部領域へ充填する材料粉末とを組成の異なる２種類の粉末としたが、さらに大端部領域へ充填する粉末と小端部領域へ充填する粉末とをそれぞれ組成の異なるものとして、３種類の組成の異なる材料粉末を用いるようにしてもよい。   For example, in the embodiment, the material powder for filling the column region of the mold cavity and the material powder for filling the large / small end region are two kinds of powders having different compositions. Three types of material powders having different compositions may be used, assuming that the filling powder and the filling powder in the small end region have different compositions.

本発明は、材料粉末を燒結して形成する燒結コンロッドに用いて好適である。   The present invention is suitable for use in a sintered connecting rod formed by sintering material powder.

実施形態の成形金型を示す平面概要図である。It is a plane schematic diagram which shows the shaping die of embodiment. セパレータの一例を模式的に示す説明図である。It is explanatory drawing which shows an example of a separator typically.

符号の説明Explanation of symbols

１：金型 １０：キャビティ １２：大端部領域 １４：コラム領域 １６：小端部領域
２：セパレータ ２４：スリット 1: Mold 10: Cavity 12: Large end region 14: Column region 16: Small end region 2: Separator 24: Slit

Claims (5)

金型のキャビティに材料粉末を充填する粉末充填工程と、
充填された該材料粉末を加圧して圧粉体を形成する加圧成形工程と、
該圧粉体を焼結鍛造してコンロッド粗材を形成する焼結鍛造工程と、
を有する大端部と小端部と該大端部と該小部端とを連接するコラム部とを有するコンロッドの製造方法であって、
前記粉末充填工程では、前記キャビティの前記コラム部に対応するコラム部領域と、前記大端部に対応する大端部領域および前記小端部に対応する小端部領域とを前記材料粉末の移動を阻止するセパレータで区画し、該コラム部領域には該大端部領域と該小端部領域とへ充填する材料粉末よりも高強度の材料粉末を充填し、
前記セパレータは、前記加圧成形工程において該材料粉末の流動に応じて変形し、かつ前記焼結鍛造工程において溶融又は分解するものであることを特徴とするコンロッドの製造方法。 A powder filling process for filling the mold cavity with material powder;
A pressure forming step of pressing the filled material powder to form a green compact;
A sintering forging step of sintering the green compact to form a connecting rod coarse material;
A connecting rod having a large end, a small end, and a column portion connecting the large end and the small end,
In the powder filling step, the material powder moves between a column portion region corresponding to the column portion of the cavity, a large end region corresponding to the large end portion, and a small end region corresponding to the small end portion. The column portion region is filled with a material powder having a strength higher than that of the material powder filled in the large end region and the small end region,
The separator is a method for producing a connecting rod, wherein the separator is deformed in accordance with the flow of the material powder in the pressure forming step and is melted or decomposed in the sintering forging step. 前記セパレータは、前記材料粉末の粒径よりも狭幅で圧縮方向に延在する複数のスリットを有する請求項１に記載のコンロッドの製造方法。   The method of manufacturing a connecting rod according to claim 1, wherein the separator has a plurality of slits that are narrower than the particle diameter of the material powder and extend in the compression direction. 前記セパレータは、Ｃｕ、Ａｇ、Ｓｎのうちの何れか一よりなる請求項１又は２に記載のコンロッドの製造方法。   The method for manufacturing a connecting rod according to claim 1, wherein the separator is made of any one of Cu, Ag, and Sn. 前記キャビティの前記コラム部領域に充填される材料粉末は、少なくともＣｕ、Ｍｏ、Ｎｉのうちの１種以上を含むＦｅ−Ｃ系合金粉末である請求項１〜３の何れか一項に記載のコンロッドの製造方法。   The material powder with which the said column part area | region of the said cavity is filled is Fe-C type-alloy powder containing at least 1 or more types of Cu, Mo, and Ni, As described in any one of Claims 1-3. A method for manufacturing a connecting rod. 大端部と、小端部と、該大端部と該小部端とを連接するコラム部とを一体的に焼結形成したコンロッドであって、
前記コラム部は、前記大端部及び前記小端部を形成する材料粉末よりも高強度の材料粉末を用いて形成されていることを特徴とするコンロッド。 A connecting rod formed by integrally sintering a large end, a small end, and a column portion connecting the large end and the small end,
The column part is formed using a material powder having a strength higher than that of the material powder forming the large end part and the small end part.
JP2008008070A 2008-01-17 2008-01-17 Method for producing connecting rod, and connecting rod Withdrawn JP2009167482A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012510024A (en) * 2009-10-30 2012-04-26 マン・ディーゼル・アンド・ターボ，フィリアル・アフ・マン・ディーゼル・アンド・ターボ・エスイー，ティスクランド Diesel engine fuel valve nozzle
US10562102B2 (en) 2015-01-06 2020-02-18 Hyundai Motor Company Green compact of sintered connecting rod using different kind of powder and method of manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012510024A (en) * 2009-10-30 2012-04-26 マン・ディーゼル・アンド・ターボ，フィリアル・アフ・マン・ディーゼル・アンド・ターボ・エスイー，ティスクランド Diesel engine fuel valve nozzle
US10562102B2 (en) 2015-01-06 2020-02-18 Hyundai Motor Company Green compact of sintered connecting rod using different kind of powder and method of manufacturing the same

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