JPH0612130B2 - Roller bearing cage for high temperature - Google Patents
Roller bearing cage for high temperatureInfo
- Publication number
- JPH0612130B2 JPH0612130B2 JP19615988A JP19615988A JPH0612130B2 JP H0612130 B2 JPH0612130 B2 JP H0612130B2 JP 19615988 A JP19615988 A JP 19615988A JP 19615988 A JP19615988 A JP 19615988A JP H0612130 B2 JPH0612130 B2 JP H0612130B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- cage
- powder
- boron carbide
- based composite
- 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 - Fee Related
Links
Landscapes
- Rolling Contact Bearings (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は、内輪と外輪の軌道面間にころがり案内される
転動体を嵌合抱持する保持器であって、とくに高温用ラ
ジアルあるいはスラストころがり軸受の保持器に関する
ものである。TECHNICAL FIELD The present invention relates to a retainer that fits and holds a rolling element that is rolled and guided between raceways of an inner ring and an outer ring, and is particularly suitable for high temperature radial or thrust rolling. The present invention relates to a cage for a bearing.
「従来の技術」 近年、高速化、軽量化、高能率化を追及する結果とし
て、機械の運転温度が高くなるにしたがって、高温用こ
ろがり軸受の要求が高まっている。“Prior Art” In recent years, as a result of pursuing higher speed, lighter weight, and higher efficiency, there is an increasing demand for high temperature rolling bearings as the operating temperature of machines increases.
高温領域（300℃以上）で使用されるころがり軸受にお
いては、ころがり接触面間に潤滑油やグリースのような
流体潤滑剤を使用することができないため、通常、黒鉛
や二硫化モリブデンのような固体潤滑剤が用いられてい
る。In rolling bearings used in high temperature regions (300 ° C or higher), fluid lubricants such as lubricating oil or grease cannot be used between rolling contact surfaces, so solid materials such as graphite and molybdenum disulfide are usually used. A lubricant is used.
この固体潤滑剤は、流体潤滑剤のような流動性、濡れ性
を有しないので、これを使用する場合には該ころがり接
触面間に塗布、充填などの手段を用いることができな
い。Since this solid lubricant does not have fluidity and wettability like a fluid lubricant, when it is used, means such as coating or filling between the rolling contact surfaces cannot be used.
したがって、固体潤滑剤を使用する場合は、内輪と外輪
の軌道面間にころがり案内される転動体を嵌合抱持する
保持器を固体潤滑剤で形成し、転動中に転動体の表面に
保持器から固体潤滑剤が移着して該転動体表面に固体潤
滑剤被膜が形成され、さらに該転動体とのころがり接触
により内、外輪の軌道面に該固体潤滑剤被膜が形成さ
れ、このようにしてころがり接触面間に形成された固体
潤滑剤被膜により潤滑を行うという方法が採られてい
る。Therefore, when a solid lubricant is used, the cage that fits and holds the rolling element that is rolled and guided between the raceways of the inner ring and the outer ring is made of solid lubricant and is retained on the surface of the rolling element during rolling. The solid lubricant is transferred from the container to form a solid lubricant film on the surface of the rolling element, and further rolling contact with the rolling element forms the solid lubricant film on the raceways of the inner and outer rings. Then, a method of performing lubrication with a solid lubricant film formed between the rolling contact surfaces is adopted.
しかるに、従来より、高温用ころがり軸受の保持器には
黒鉛が使用されている。However, conventionally, graphite is used for the cage of the rolling bearing for high temperature.
「発明が解決しようとする問題点」 しかしながら、黒鉛からなる保持器は、比較的高温(200
〜300℃)の領域において安定した潤滑性を示す反面、そ
れ以上の高温領域の使用においては酸化消耗が激しいこ
と、また機械的強度に欠点があり、保持器の孔内に転動
体を嵌合するさい、往々にしてヒビ割れ、破損を惹起す
るという問題がある。"Problems to be solved by the invention" However, a cage made of graphite has a relatively high temperature (200
It shows stable lubricity in the temperature range of up to 300 ° C, but it has a strong oxidative wear in the use in the higher temperature range and has a mechanical strength defect, so the rolling element fits in the hole of the cage. When doing so, there is often the problem of causing cracking or damage.
本発明者らは、高温領域における黒鉛の潤滑性に着目
し、上述した従来の黒鉛からなる保持器を使用したころ
がり軸受の摩擦機構についてさらに追求した結果、保持
器の孔と該孔に嵌合抱持される転動体のころがり接触方
向に方向性があることを見出した。The inventors of the present invention focused on the lubricity of graphite in a high temperature region and further pursued the friction mechanism of the rolling bearing using the above-described conventional cage made of graphite. It has been found that the rolling contact of the held rolling elements has directionality.
すなわち、保持器の孔と転動体とのころがり接触方向は
ラジアルおよびスラスト軸受のいずれにおいても、転動
体が嵌合抱持される円孔の円周方向の孔周縁部であるこ
とを見出した。That is, it has been found that the rolling contact direction between the hole of the cage and the rolling element is the circumferential edge portion of the circular hole in which the rolling element is fitted and held in both the radial and thrust bearings.
本発明はこの知見に基づき、ころがり接触方向の領域は
摺動特性に優れ、その他の領域は機械的強度に優れ、高
温領域においても酸化消耗の極めて小さい黒鉛を主体と
した高温用ころがり軸受の保持器を得ることを目的とす
るものである。Based on this knowledge, the present invention is based on this knowledge and has excellent sliding characteristics in the area of rolling contact, excellent mechanical strength in other areas, and retains a high-temperature rolling bearing mainly composed of graphite, which has extremely small oxidation consumption even in a high temperature area. The purpose is to obtain a vessel.
「問題点を解決するための手段」 上述した目的を達成するべく、本発明はつぎの技術手段
（構成）を採る。"Means for Solving Problems" In order to achieve the above-mentioned object, the present invention adopts the following technical means (configuration).
すなわち、本発明の第１の構成は、内輪と外輪の軌道面
間にころがり案内される転動体を嵌合抱持する円筒状保
持器であって、該保持器の周面には該転動体を嵌合抱持
する複数個の円孔が形成されており、該保持器はその両
端からそれぞれ幅方向に該円孔の周縁までの領域が黒鉛
を主体とし該黒鉛中に炭化ホウ素を分散含有した高強度
の黒鉛系複合体で形成されており、その他の領域が黒鉛
を主体とし該黒鉛中に金属ホウ化物あるいは金属ホウ化
物および炭化ホウ素を分散含有した摺動特性に優れた黒
鉛系複合体で一体的に形成されていることを特徴とする
高温用ころがり軸受の保持器であり、第２の構成は、内
輪と外輪の軌道面間にころがり案内される転動体を嵌合
抱持する円筒状保持器であって、該保持器の周面には該
転動体を嵌合抱持する複数個の円孔が該保持器の一方の
端面に開口する溝に連通して形成されており、該保持器
は該溝と反対側の端面から幅方向に外円孔の周縁までの
領域が黒鉛を主体とし該黒鉛中に炭化ホウ素を分散含有
した高強度の黒鉛系複合体で形成されており、その他の
領域が黒鉛を主体とし該黒鉛中に金属ホウ化物あるいは
金属ホウ化物および炭化ホウ素を分散含有した摺動特性
に優れた黒鉛系複合体で一体的に形成されていることを
特徴とする高温用ころがり軸受の保持器であり、第３の
構成は、内輪と外輪の軌道面間にころがり案内される転
動体を嵌合抱持する円筒状保持器であって、該保持器の
端面にはその円周方向に該転動体を嵌合抱持する複数個
の円孔が形成されており、該保持器はその内周縁および
外周縁からそれぞれ該円孔の周縁までの領域が黒鉛を主
体とし該黒鉛中に炭化ホウ素を分散含有した高強度の黒
鉛系複合体で形成されており、その他の領域が黒鉛を主
体とし該黒鉛中に金属ホウ化物あるいは金属ホウ化物お
よび炭化ホウ素を分散含有した摺動特性に優れた黒鉛系
複合体で一体的に形成されていることを特徴とする高温
用ころがり軸受の保持器である。That is, the first configuration of the present invention is a cylindrical cage that fits and holds a rolling element that is rolled and guided between the raceways of the inner ring and the outer ring, and the rolling element is provided on the peripheral surface of the cage. A plurality of circular holes for fitting and holding are formed, and the retainer has graphite in a region from both ends to the peripheral edge of the circular hole in the width direction, and graphite is mainly contained in the graphite. It is formed of a high-strength graphite-based composite material, and the other region is mainly composed of graphite and is integrated with a graphite-based composite material having excellent sliding properties, in which metal boride or metal boride and boron carbide are dispersedly contained. Is a cage for a high temperature rolling bearing, wherein the second configuration is a cylindrical retainer that fits and holds a rolling element that is guided by rolling between raceway surfaces of an inner ring and an outer ring. The rolling element is fitted and held on the peripheral surface of the cage. A plurality of circular holes are formed so as to communicate with a groove that opens at one end surface of the cage, and the cage has a region from the end surface opposite to the groove to the peripheral edge of the outer circular hole in the width direction. Is mainly composed of graphite and is formed of a high-strength graphite-based composite containing boron carbide dispersed therein, and the other region is mainly composed of graphite and is a metal boride or a metal boride and boron carbide in the graphite. Is a cage for a high temperature rolling bearing, characterized in that it is integrally formed of a graphite-based composite having dispersed properties and excellent in sliding characteristics, and the third structure is between the raceways of the inner ring and the outer ring. A cylindrical retainer that fits and holds a rolling element that is guided by rolling, and a plurality of circular holes that fit and hold the rolling body in the circumferential direction are formed on the end surface of the retainer. , The retainer extends from its inner peripheral edge and outer peripheral edge to the peripheral edge of the circular hole, respectively. Region is formed of a high-strength graphite-based composite containing graphite as a main component and boron carbide dispersed in the graphite, and the other region is mainly composed of graphite and a metal boride or a metal boride and A cage for a high temperature rolling bearing, which is integrally formed of a graphite-based composite containing boron carbide dispersed therein and having excellent sliding characteristics.
上述した第１、第２、第３の構成において、摺動特性に
優れた黒鉛系複合体を形成する金属ホウ化物としては、
元素周期律表の第IVａ族、第Ｖａ族および第VIａ族の金
属のホウ化物で、ホウ化チタン（TiB）、二ホウ化チタ
ン（TiB2、二ホウ化ジルコニウム（ZrB2）、二ホウ化ハ
フニウム（HfB2）、二ホウ化バナジウム（VB2）、二ホ
ウ化ニオブ（NbB2）、二ホウ化タンタル（TaB2）、ホウ
化クロム(CrB)、二ホウ化クロム（CrB2）、二ホウ化モ
リブデン(MoB2)、ホウ化タングステン(WB)、二ホウ化タ
ングステン(WB2)などが挙げられ、これらはそれぞれ単
独でもしくは２種以上を組合わせて使用される。In the above-mentioned first, second, and third configurations, as the metal boride forming the graphite-based composite having excellent sliding properties,
Borides of metals of Groups IVa, Va and VIa of the Periodic Table of Elements, titanium boride (TiB), titanium diboride (TiB 2 , zirconium diboride (ZrB 2 ), diboride Hafnium (HfB 2 ), vanadium diboride (VB 2 ), niobium diboride (NbB 2 ), tantalum diboride (TaB 2 ), chromium boride (CrB), chromium diboride (CrB 2 ), two Examples thereof include molybdenum boride (MoB 2 ), tungsten boride (WB), and tungsten diboride (WB 2 ). These may be used alone or in combination of two or more.
また、上述した金属ホウ化物の他に、後述する加圧・加
熱燒結工程において、炭化ホウ素の存在下で該炭化ホウ
素の存在下で該炭化ホウ素と反応して金属ホウ化物を形
成する元素周期律表の第IVａ族、第Ｖａ族および第VIａ
族の金属の炭化物、例えば炭化チタン(TiC)、炭化ジル
コニウム(ZrC)、炭化ハフニウム（HfC）、炭化バナジウ
ム（VC）、炭化ニオブ（NbC）、炭化タンタル（TaC）、
炭化クロム(Cr3C2)、炭化モリブデン(MoC)、炭化タング
ステン(WC)などを使用することができる。Further, in addition to the above-mentioned metal boride, in the pressure / heat sintering step described later, an element periodic rule which reacts with the boron carbide in the presence of the boron carbide to form the metal boride. Table IVa, Va and VIa
Carbides of group metals such as titanium carbide (TiC), zirconium carbide (ZrC), hafnium carbide (HfC), vanadium carbide (VC), niobium carbide (NbC), tantalum carbide (TaC),
Chromium carbide (Cr 3 C 2 ), molybdenum carbide (MoC), tungsten carbide (WC), etc. can be used.
上述した構成からなる保持器は、仮焼ピッチコークスを
主成分とし、これに炭化ホウ素あるいは炭化ホウ素と金
属ホウ化物およびあるいは金属炭化物を所定量配合し、
これを加圧・加熱燒結（ホットプレス）して該コークス
を該炭化ホウ素およびあるいは金属ホウ化物の黒鉛化促
進作用、燒結促進作用によって黒鉛化し、該黒鉛化した
黒鉛中に炭化ホウ素およびあるいは金属ホウ化物が分散
含有した黒鉛系複合体から形成される。The cage having the above-mentioned configuration has a calcined pitch coke as a main component, and a predetermined amount of boron carbide or boron carbide and a metal boride and / or a metal carbide,
This is pressed and heated and sintered (hot press) to graphitize the coke by the graphitization promoting action and the sintering promoting action of the boron carbide and / or the metal boride, and the boron carbide and / or the metal borate is added to the graphitized graphite. It is formed from a graphite-based composite in which a compound is dispersedly contained.
以下、各製造方法について説明する。Hereinafter, each manufacturing method will be described.
＜原料粉末の調整＞ 1)．粒度150μｍ以下の仮焼ピッチコークス粉末に、平
均粒度1.5μｍの炭化ホウ素粉末(B4C)を所定量配合し、
混合して該コークス粉末と炭化ホウ素粉末の均一な混合
粉末を得る（以下「混合粉末」という）。<Preparation of raw material powder> 1). A predetermined amount of boron carbide powder (B 4 C) with an average particle size of 1.5 μm was mixed with a calcined pitch coke powder with a particle size of 150 μm or less,
A uniform mixed powder of the coke powder and the boron carbide powder is obtained by mixing (hereinafter referred to as “mixed powder”).
2)．粒度150μｍ以下の仮焼ピッチコークス粉末に、平
均粒度７μｍの第IVａ族、第Ｖａ族、第VIａ族の金属の
ホウ化物粉末の１種もしくはそれ以上を所定量配合し、
混合して該コークス粉末と金属ホウ化物粉末の均一な混
合粉末を得る（以下「混合粉末」という）。2). A calcinated pitch coke powder having a particle size of 150 μm or less is mixed with a predetermined amount of one or more boride powders of Group IVa, Va or VIa metals having an average particle size of 7 μm,
A uniform mixed powder of the coke powder and the metal boride powder is obtained by mixing (hereinafter referred to as "mixed powder").
3)．粒度150μｍ以下の仮焼ピッチコークス粉末に、平
均粒度７μｍの第IVａ族、第Ｖａ族、第VIａ族の金属の
ホウ化物粉末の１種もしくはそれ以上を所定量と炭化ホ
ウ素粉末の所定量を配合し、混合して該コークス粉末と
金属ホウ化物粉末と炭化ホウ素粉末の均一な混合粉末を
得る（以下「混合粉末」という）。3). A calcined pitch coke powder having a particle size of 150 μm or less is mixed with a predetermined amount of one or more kinds of boride powders of Group IVa, Va or VIa metals having an average particle size of 7 μm and a predetermined amount of boron carbide powder. And then mixed to obtain a uniform mixed powder of the coke powder, the metal boride powder, and the boron carbide powder (hereinafter referred to as “mixed powder”).
4)．粒度150μｍ以下の仮焼ピッチコークス粉末に、平
均粒度７μｍの第IVａ族、第Ｖａ族、第VIａ族の金属の
ホウ化物粉末の１種もしくはそれ以上を所定量と該金属
炭化物粉末と同量もしくはそれ以上の炭化ホウ素粉末を
配合し、混合して該コークス粉末と金属炭化物粉末と炭
化ホウ素粉末の均一な混合粉末を得る（以下「混合粉末
」という）。Four). A calcined pitch coke powder having a particle size of 150 μm or less, a predetermined amount of one or more kinds of boride powders of Group IVa, Va, and VIa metals having an average particle size of 7 μm and the same amount as the metal carbide powder or More boron carbide powder is blended and mixed to obtain a uniform mixed powder of the coke powder, the metal carbide powder, and the boron carbide powder (hereinafter referred to as “mixed powder”).
＜製造方法＞ (イ)第１の構成からなる保持器の製造方法。<Manufacturing Method> (a) A manufacturing method of the cage having the first configuration.
（第１工程） 内面に中空円筒部１、中央にコアーロッド８を備えた黒
鉛型２を用意し、該黒鉛型２の中空円筒部１内に上記混
合粉末を所定高さまで均一に充填し、圧粉する（第４
図中、符号）。(First Step) A graphite mold 2 having a hollow cylindrical portion 1 on the inner surface and a core rod 8 in the center is prepared, and the mixed powder is uniformly filled into the hollow cylindrical portion 1 of the graphite mold 2 up to a predetermined height, and a pressure is applied. Grind (4th
(In the figure, reference numeral).
（第二工程） 該圧粉された混合粉末の上に、前記混合粉末、混合
粉末、混合粉末のいずれかを所定高さまで均一に充
填し、圧粉する（第４図中、符号もしくはあるいは
）。(Second step) Any one of the above-mentioned mixed powder, mixed powder, and mixed powder is uniformly filled on the pressed mixed powder to a predetermined height, and compressed (reference numeral in FIG. 4 or) .
（第三工程） 該圧粉された混合粉末もしくは混合粉末あるいは混
合粉末の上に、さらに混合粉末を均一に充填し、圧
粉して（第４図中、符号）、該中空円筒部内に混合粉
末−混合粉末（もしくは混合粉末あるいは混合粉
末）−混合粉末からなる三層の圧粉体を形成する。(Third step) The powder mixture, the powder mixture, or the powder mixture that has been compacted is further uniformly filled with the powder mixture, which is compacted (reference numeral in FIG. 4) and mixed in the hollow cylindrical portion. A three-layer green compact composed of powder-mixed powder (or mixed powder or mixed powder) -mixed powder is formed.
（第四工程） 該三層の圧粉体を、圧力100kg/cm2以上、好ましくは150
〜300kg/cm2の加圧下で、1500℃以上、好ましくは1800
〜2500℃の温度で加圧・加熱燒結（ホットプレス）し、
燒結円筒体を得る。(Fourth step) The green powder of the three layers, the pressure 100kg / cm 2 or more, preferably 150
Under a pressure of ~300kg / cm 2, 1500 ℃ or higher, preferably 1800
Pressurize and heat sinter (hot press) at a temperature of ~ 2500 ° C,
Obtain a sintered cylinder.
この加圧・加熱燒結工程において、仮焼ピッチコークス
は該コークスに配合された炭化ホウ素およびあるいは金
属ホウ化物（混合粉末、混合粉末、混合粉末）の
黒鉛化促進作用および燒結促進作用により黒鉛化され、
該燒結円筒体はその両端から幅方向に所定幅の領域が黒
鉛を主体とし該黒鉛中に炭化ホウ素が分散含有された高
強度の黒鉛系複合体で、その他の領域が黒鉛を主体とし
該黒鉛中に金属ホウ化物あるいは黒鉛を主体とし該黒鉛
中に金属ホウ化物および炭化ホウ素が分散含有された摺
動特性に優れた黒鉛系複合体で形成される。In this pressurizing / heating sinter step, the calcined pitch coke is graphitized by the graphitization promoting action and the sinter promoting action of the boron carbide and / or metal boride (mixed powder, mixed powder, mixed powder) blended in the coke. ,
The sintered cylindrical body is a high-strength graphite-based composite in which a region having a predetermined width in the width direction from both ends thereof is mainly made of graphite, and boron carbide is dispersed and contained in the graphite, and the other region is mainly made of graphite. It is formed of a graphite-based composite having a metal boride or graphite as a main component and a metal boride and boron carbide dispersedly contained in the graphite and having excellent sliding properties.
また、混合粉末は加圧・加熱燒結工程において、混合
粉末中の金属炭化物が炭化ホウ素の存在下で該炭化ホウ
素と反応して金属ホウ化物となり、この金属ホウ化物が
黒鉛中に分散含有されて摺動特性に優れた黒鉛系複合体
を形成する。Further, the mixed powder, in the pressurizing and heating sintering step, the metal carbide in the mixed powder reacts with the boron carbide in the presence of boron carbide to form a metal boride, and this metal boride is dispersed and contained in graphite. A graphite-based composite having excellent sliding properties is formed.
（第五工程） このようにして得られた燒結円筒体の外周面中央部、す
なわち黒鉛を主体とし該黒鉛中に金属ホウ化物あるいは
金属ホウ化物および炭化ホウ素が分散含有された摺動特
性に優れた黒鉛系複合体部分に機械加工により、その周
方向に規制正しく複数個の円孔を形成する。(Fifth Step) The center portion of the outer peripheral surface of the sintered cylindrical body thus obtained, that is, the main component is graphite, and the metal boride or the metal boride and boron carbide are dispersedly contained in the graphite, and the sliding characteristics are excellent. By machining the graphite-based composite part, a plurality of circular holes are properly formed in the circumferential direction.
このように第一工程から第五工程を経て、第１図乃至第
２図に示す黒鉛複合体からなる複数個の円孔Ｂを備えた
円筒状保持器Ａが形成される。Thus, through the first step to the fifth step, the cylindrical cage A having a plurality of circular holes B made of the graphite composite shown in FIGS. 1 and 2 is formed.
図において、符号C1、C1が両端から幅方向に円孔Ｂの周
縁までの領域に形成された黒鉛を主体とし該黒鉛中に炭
化ホウ素を分散含有した高強度の黒鉛系複合体部分であ
り、符号C2が外周中央部に形成された黒鉛を主体とし該
黒鉛中に金属ホウ化物あるいは金属ホウ化物および炭化
ホウ素を分散含有した摺動特性に優れた黒鉛系複合体部
分である。In the figure, symbols C 1 and C 1 are high-strength graphite-based composite parts mainly composed of graphite formed in the region from both ends to the periphery of the circular hole B in the width direction and containing boron carbide dispersed in the graphite. The reference numeral C 2 is a graphite-based composite part mainly composed of graphite formed in the central part of the outer periphery and containing a metal boride or a metal boride and boron carbide dispersed therein and excellent in sliding properties.
このようにして製造された円筒状保持器Ａは第３図に示
すアンギュラ玉軸受の保持器として使用されて好適であ
る。The cylindrical cage A thus manufactured is suitable for use as a cage of the angular ball bearing shown in FIG.
図において、符号３がアンギュラ玉軸受、４が外輪、５
が内輪、６が該保持器Ａの円孔Ｂに嵌合抱持された転動
体（玉）である。In the figure, reference numeral 3 is an angular contact ball bearing, 4 is an outer ring, 5
Is an inner ring, and 6 is a rolling element (ball) fitted and held in the circular hole B of the cage A.
(ロ)第２の構成からなる保持器の製造方法。(B) A method of manufacturing the cage having the second configuration.
（第一工程） 内面に中空円筒部１、中央にコアーロッド８を備えた黒
鉛型２を用意し、該黒鉛型１の中空円筒部２内に前記混
合粉末を所定高さまで均一に充填し、圧粉する（第８
図中、符号）。(First step) A graphite mold 2 having a hollow cylindrical portion 1 on the inner surface and a core rod 8 in the center is prepared, and the mixed powder is uniformly filled into the hollow cylindrical portion 2 of the graphite mold 1 up to a predetermined height, and a pressure is applied. Flour (Eighth
(In the figure, reference numeral).
（第二工程） 該圧粉された混合粉末の上に、前記混合粉末、混合
粉末、混合粉末のいずれかを所定高さまで均一に充
填し、圧粉して（第８図中、符号もしくはあるいは
）、該中空円筒部１内に混合粉末−混合粉末（も
しくは混合粉末あるいは混合粉末）からなる二層の
圧粉体を形成する。(Second step) Any one of the mixed powder, the mixed powder, and the mixed powder is uniformly filled to a predetermined height on the pressed mixed powder, and the powder is compressed (in FIG. ), A two-layer green compact comprising mixed powder-mixed powder (or mixed powder or mixed powder) is formed in the hollow cylindrical portion 1.
以下、前記と同様の工程を経て、一方の端部から幅方向
に所定幅の領域が黒鉛を主体とし該黒鉛中に炭化ホウ素
が分散含有された高強度の黒鉛系複合体、その他の領域
が黒鉛を主体とし該黒鉛中に金属ホウ化物あるいは黒鉛
を主体とし該黒鉛中に金属ホウ化物および炭化ホウ素が
分散含有された摺動特性に優れた黒鉛系複合体からなる
燒結円筒体を形成する。Hereinafter, through the same steps as described above, a region having a predetermined width in the width direction from one end is mainly composed of graphite, and a high-strength graphite-based composite in which boron carbide is dispersedly contained in the graphite, other regions are A sintered cylinder made of a graphite-based composite having graphite as a main component and a metal boride or graphite as a main component, and a metal boride and boron carbide dispersedly contained in the graphite and having excellent sliding properties is formed.
このようにして得た燒結円筒体の外周面、すなわち黒鉛
を主体とし該黒鉛中に金属ホウ化物あるいは金属ホウ化
物および炭化ホウ素が分散含有された摺動特性に優れた
黒鉛系複合体部分に機械加工により、その周方向に規則
正しく周縁を接合面に接して複数個の円孔を形成すると
ともに該円孔に連続しかつ他方の端部に開口する溝を形
成し、第５図乃至第６図に示す黒鉛系複合体からなる複
数個の円孔Ｂと該円孔Ｂに連通し他端面に開口する溝Ｄ
を備えた円筒状保持器A1が形成される。The outer peripheral surface of the sintered cylinder thus obtained, that is, the graphite-based composite part containing metal boride or metal boride and boron carbide dispersed therein and having excellent sliding properties By processing, a peripheral edge is regularly contacted with the joint surface in the circumferential direction to form a plurality of circular holes, and a groove which is continuous with the circular holes and opens at the other end is formed. A plurality of circular holes B made of a graphite-based composite and a groove D communicating with the circular holes B and opening at the other end surface
A cylindrical cage A 1 is formed with
図において、符号C1が一方の端部から幅方向に円孔Ｂの
周縁までの領域に形成された黒鉛を主体とし該黒鉛中に
炭化ホウ素を分散含有した高強度の黒鉛系複合体部分で
あり、符号C2が黒鉛を主体とし該黒鉛中に金属ホウ化物
あるいは金属ホウ化物および炭化ホウ素を分散含有した
摺動特性に優れた黒鉛系複合体部分である。In the figure, reference numeral C 1 is a high-strength graphite-based composite part mainly composed of graphite formed in a region from one end to the peripheral edge of the circular hole B in the width direction and containing boron carbide dispersed in the graphite. The reference numeral C 2 represents a graphite-based composite part which is mainly composed of graphite and which contains metal boride or metal boride and boron carbide dispersed therein and has excellent sliding properties.
このようにして製造された円筒状保持器A1は第７図に示
す深みぞ玉軸受の保持器として使用されて好適である。The cylindrical cage A 1 manufactured in this way is suitable for use as a cage for the deep groove ball bearing shown in FIG. 7.
図において、符号が深みぞ玉軸受、４が外輪、５が内
輪、６が該保持器Ａの円孔Ｂに溝Ｄから嵌合され抱持さ
れた転動体（玉）である。In the figure, reference numerals are deep groove ball bearings, 4 is an outer ring, 5 is an inner ring, and 6 is a rolling element (ball) fitted and held in a circular hole B of the cage A from a groove D.
(ハ)第３の構成からなる保持器の製造方法。(C) A method of manufacturing a cage having the third configuration.
（第一工程） 前記混合粉末を使用し、所定の内径を有する円筒状圧
粉体を形成する。(First Step) Using the mixed powder, a cylindrical green compact having a predetermined inner diameter is formed.
（第二工程） 前記混合粉末、混合粉末、混合粉末のいずれかの
混合粉末を使用し、前記第一工程で得た円筒圧粉体の外
径に等しい内径を有しかつ肉厚の円筒状圧粉体を形成す
る。(Second step) The mixed powder, the mixed powder, or the mixed powder of any of the mixed powders is used, and a cylindrical shape having an inner diameter equal to the outer diameter of the cylindrical green compact obtained in the first step and having a thick wall Form a green compact.
（第三工程） 前記混合粉末を使用し、前記第二工程で得た円筒圧粉
体の外径に等しい内径を有する円筒状圧粉体を形成す
る。(Third step) Using the mixed powder, a cylindrical green compact having an inner diameter equal to the outer diameter of the cylindrical green compact obtained in the second step is formed.
（第四工程） 黒鉛型２の中空円筒部１内のコアーロッド８の外周面
に、順次上記第一、第二および第三工程で得た円筒状圧
粉体を圧入嵌合し、該中空円筒部１内に円筒状圧粉体の
重合体を形成する（第１１図中、符号が第一工程およ
び第三工程で得た円筒状圧粉体、が第二工程で得た円
筒状圧粉体である。）。(Fourth step) The cylindrical green compacts obtained in the first, second and third steps are sequentially press-fitted onto the outer peripheral surface of the core rod 8 in the hollow cylindrical portion 1 of the graphite mold 2 to form the hollow cylinder. A polymer of a cylindrical green compact is formed in the portion 1 (in FIG. 11, the reference numerals designate the cylindrical green compact obtained in the first step and the third step, and the cylindrical green compact obtained in the second step). It is the body.)
（第五工程） 該黒鉛型２の中空円筒部１内に形成された円筒状圧粉体
の重合体を、前述した加圧・加熱燒結条件で燒結し、円
筒燒結体を得る。(Fifth Step) The polymer of the cylindrical green compact formed in the hollow cylindrical portion 1 of the graphite mold 2 is sintered under the above-described pressurizing / heating sintering conditions to obtain a cylindrical sintered body.
このようにして得た円筒燒結体は内、外周縁からそれぞ
れ径方向に所定幅の領域が黒鉛を主体とし該黒鉛中に炭
化ホウ素を分散含有した高強度の黒鉛系複合体で形成さ
れ、その他の領域が黒鉛を主体とし該黒鉛中に金属ホウ
化物あるいは金属ホウ化物および炭化ホウ素を分散含有
した摺動特性に優れた黒鉛系複合体で形成される。The cylindrical sintered body thus obtained is formed of a high-strength graphite-based composite in which a region having a predetermined width in a radial direction from the outer peripheral edge is mainly composed of graphite and boron carbide is dispersed and contained in the graphite. This region is mainly composed of graphite and is formed of a graphite-based composite having excellent sliding properties, which contains metal boride or metal boride and boron carbide dispersed in the graphite.
この円筒燒結体の中央部分、すなわち摺動特性に優れた
黒鉛複合体部分に円周方向に複数個の円孔を規則正しく
形成し、第９図に示す黒鉛複合体からなる複数個の円孔
Ｂを備えた円筒状保持器A2が形成される。A plurality of circular holes B formed from the graphite composite shown in FIG. 9 are formed by regularly forming a plurality of circular holes in the circumferential direction in the central portion of the cylindrical sintered body, that is, the graphite composite portion having excellent sliding characteristics. A cylindrical retainer A 2 is formed which has
図において、符号C1、C1が内、外周縁からそれぞれ径方
向に所定幅の領域が黒鉛を主体とし該黒鉛中に炭化ホウ
素を分散含有した高強度の黒鉛系複合体部分であり、符
号C2が黒鉛を主体とし該黒鉛中に金属ホウ化物あるいは
金属ホウ化物および炭化ホウ素を分散含有した摺動特性
に優れた黒鉛系複合体部分である。In the figure, the symbols C 1 and C 1 are the high-strength graphite-based composite part in which the regions each having a predetermined width in the radial direction from the inner and outer peripheral edges are mainly made of graphite and boron carbide is dispersedly contained in the graphite. C 2 is a graphite-based composite part which is mainly composed of graphite and which contains a metal boride or a metal boride and boron carbide dispersed therein and which has excellent sliding properties.
このようにして製造された円筒状保持器A2は第１０図に
示すスラスト玉軸受の保持器として使用されて好適であ
る。The cylindrical cage A 2 manufactured in this way is suitable for use as a cage for the thrust ball bearing shown in FIG.
図において、符号８がスラスト玉軸受、４が外輪、５が
内輪、６が該保持器A2の円孔Ｂ内に嵌合抱持された転動
体（玉）である。In the figure, reference numeral 8 is a thrust ball bearing, 4 is an outer ring, 5 is an inner ring, and 6 is a rolling element (ball) fitted and held in the circular hole B of the cage A 2 .
上述した各製造方法における該保持器の高強度部分を形
成する混合粉末において、主成分をなす仮焼ピッチコ
ークス粉末に配合される炭化ホウ素粉末は、加圧・加熱
燒結過程において、該コークス粉末の黒鉛化促進作用お
よび燒結促進作用としての役割を果たすとともに、得ら
れる燒結体（黒鉛体）中に分散含有されて、とくに該燒
結体の機械的強度の向上、高温領域における耐酸化消耗
性の向上に寄与する。In the mixed powder forming the high-strength portion of the cage in each of the above-mentioned manufacturing methods, the boron carbide powder blended with the calcinated pitch coke powder as the main component is the coke powder of the coke powder during the pressurizing / heating and sintering process. It has a function of promoting graphitization and a function of promoting sintering, and is dispersed and contained in the obtained sintered body (graphite body) to improve the mechanical strength of the sintered body and to improve the oxidation and wear resistance in a high temperature region. Contribute to.
この炭化ホウ素の黒鉛化促進作用および燒結促進作用と
しての効果は、該コークス粉末に対し３重量％前後の配
合割合で現れるが、この程度の量では加圧・加熱燒結過
程中に炭化ホウ素のホウ素が全てコークスに固溶し、得
られた燒結体中に存在しないため、上述した燒結体の機
械的強度の向上、高温領域における耐酸化消耗性の向上
が不十分である。The effect of the boron carbide on the graphitization promoting effect and the sintering promoting effect appears at a compounding ratio of about 3% by weight with respect to the coke powder, but with such an amount, boron of boron carbide during the pressurizing / heating sintering process. Is not present in the obtained sintered body as a solid solution in coke, and thus the above-mentioned improvement in mechanical strength of the sintered body and improvement in oxidation wear resistance in a high temperature region are insufficient.
したがって、保持器の高強度部分を形成する黒鉛系複合
体として好ましい性質を付与するためには、該コークス
に対し少なくとも５重量％以上の炭化ホウ素を配合する
必要がある。Therefore, in order to impart desirable properties as a graphite-based composite forming the high strength portion of the cage, it is necessary to blend at least 5% by weight or more of boron carbide with respect to the coke.
この炭化ホウ素を該コークスに対し５重量％以上配合す
ることにより、燒結体中に炭化ホウ素が分散含有された
黒鉛複合体が得られ、該保持器の高強度部分に要求され
る機械的強度、耐酸化消耗性の向上が図れる。By blending 5% by weight or more of this boron carbide with respect to the coke, a graphite composite having boron carbide dispersed and contained in a sintered body is obtained, and the mechanical strength required for the high-strength portion of the cage, The oxidation wear resistance can be improved.
しかし、この炭化ホウ素の配合割合が40重量％を超える
と却って機械的強度を低下させる傾向を示す。However, if the blending ratio of this boron carbide exceeds 40% by weight, the mechanical strength tends to decrease.
したがって、炭化ホウ素のコークスに対する配合割合は
５〜40重量％、好ましくは10〜30重量％である。Therefore, the blending ratio of boron carbide to coke is 5 to 40% by weight, preferably 10 to 30% by weight.
保持器の摺動特性に優れた部分を形成する混合粉末に
おいて、主成分をなす仮焼ピッチコークス粉末に配合さ
れる元素周期律表の第IVａ族、第Ｖａ族および第VIａ族
の金属のホウ化物粉末は、上述した炭化ホウ素と同様、
加圧・加熱燒結過程において、該コークス粉末の黒鉛化
促進作用および燒結促進作用としての役割を果たすとと
もに、得られた燒結体（黒鉛体）中に分散含有されて、
とくに高温領域における摩擦摩耗特性の向上に寄与す
る。In a mixed powder forming a portion of a cage having excellent sliding properties, a metal boro alloy of Group IVa, Va or VIa of the Periodic Table of Elements, which is blended with the calcinated pitch coke powder as a main component, is used. The compound powder is similar to the above-mentioned boron carbide.
In the pressurizing / heating sinter process, the coke powder plays a role as a graphitization promoting action and a sinter promoting action, and is dispersed and contained in the obtained sintered body (graphite body),
In particular, it contributes to the improvement of frictional wear characteristics in the high temperature region.
この金属ホウ化物はそれ自体、黒鉛や二硫化モリブデン
のような潤滑性を示さないが、黒鉛燒結体中に分散含有
されることにより、相手材表面への固体潤滑（黒鉛）被
膜の造膜性を助長し、乾燥摩擦における被膜の耐久性を
増大させ、かつ摩擦摩耗特性の向上をもたらすもので、
この傾向は高温領域において著しい。This metal boride itself does not show lubricity like graphite and molybdenum disulfide, but by being dispersedly contained in the graphite sintered body, the film forming property of the solid lubrication (graphite) film on the surface of the mating material is formed. To increase the durability of the coating in dry friction and to improve the friction and wear characteristics.
This tendency is remarkable in the high temperature region.
そして、金属ホウ化物の該コークスに対する配合割合
は、５〜20重量％、好ましくは10〜15重量％が適当であ
る。The metal boride content in the coke is preferably 5 to 20% by weight, and more preferably 10 to 15% by weight.
この金属ホウ化物を該コークスに対し20重量％を超えて
配合すると、燒結体の表面（摺動面）に露出する割合が
多くなり、摩擦摩耗特性の低下を来すようになる。When this metal boride is blended in an amount of more than 20% by weight with respect to the coke, the rate of exposure on the surface (sliding surface) of the sintered body increases, and the friction and wear characteristics deteriorate.
また、保持器の摺動特性に優れた部分を形成する混合粉
末は上述した混合粉末にさらに炭化ホウ素粉末を配
合したもので、上記混合粉末から形成される黒鉛系複
合体の強度を向上させるものである。The mixed powder that forms the portion of the cage having excellent sliding characteristics is a mixture of the above-mentioned mixed powder and boron carbide powder, which improves the strength of the graphite-based composite formed from the mixed powder. Is.
そして、主成分をなす仮焼ピッチコークス粉末に対し、
元素周期律表の第IVａ族、第Ｖａ族および第VIａ族の金
属のホウ化物粉末は５〜20重量％、炭化ホウ素粉末は５
〜20重量％が適当である。And, for the calcined pitch coke powder that is the main component,
5 to 20% by weight of boride powder of a metal of group IVa, group Va and group VIa of the Periodic Table of Elements, and boron carbide powder 5
-20% by weight is suitable.
さらに、保持器の摺動特性に優れた部分を形成する混合
粉末において、主成分をなす仮焼ピッチコークス粉末
に配合される元素周期律表の第IVａ族、第Ｖａ族および
第VIａ族の金属の炭化物粉末は加圧・加熱燒結過程にお
いて、該金属炭化物とともに配合される炭化ホウ素粉末
の存在下で該炭化ホウ素と反応して金属ホウ化物を形成
するもので、得られた燒結体中に金属ホウ化物あるいは
金属ホウ化物および炭化ホウ素が分散含有され、上記混
合粉末から形成される黒鉛系複合体と同様、高温領域
における摩擦摩耗特性の向上に寄与する。Further, in the mixed powder forming the portion having excellent sliding properties of the cage, the metal of Group IVa, Va and VIa of the periodic table of the elements, which is blended with the calcinated pitch coke powder as the main component, In the sintering process under pressure and heat, the carbide powder of No. 1 reacts with the boron carbide in the presence of the boron carbide powder blended with the metal carbide to form a metal boride. Borides or metal borides and boron carbide are dispersedly contained, and like the graphite-based composite formed from the above-mentioned mixed powder, contribute to improvement of friction and wear characteristics in a high temperature region.
そして、主成分をなす仮焼ピッチコークス粉末に対し、
元素周期律表の第IVａ族、第Ｖａ族および第VIａ族の金
属の炭化物粉末は５〜20重量％、炭化ホウ素粉末は該金
属炭化物粉末と同量もしくはそれ以上で５〜20重量％の
範囲で配合されて適当である。And, for the calcined pitch coke powder that is the main component,
5 to 20% by weight of carbide powders of metals of groups IVa, Va and VIa of the periodic table of elements, and 5 to 20% by weight of boron carbide powder in the same amount as or more than the metal carbide powders. It is suitable to be blended with.
この金属炭化物粉末と炭化ホウ素粉末との配合割合が同
量の場合は、該金属炭化物粉末は炭化ホウ素と加圧・加
熱燒結下で反応して全て金属ホウ化物に変化して黒鉛中
に分散含有され、また金属炭化物粉末の配合量が炭化ホ
ウ素粉末の配合量より少ない場合は、黒鉛中に炭化ホウ
素と加圧・加熱燒結下で反応して変化した金属ホウ化物
と炭化ホウ素が分散含有されることを確認している。When the mixing ratio of the metal carbide powder and the boron carbide powder is the same, the metal carbide powder reacts with the boron carbide under pressure and heat sinter to convert them all to metal borides and disperse in the graphite. If the amount of the metal carbide powder blended is less than the amount of the boron carbide powder blended, the boron boride and the metal boride and boron carbide which have reacted and changed under pressure and heat sinter are dispersedly contained in graphite. I have confirmed that.
下表は上述した混合粉末から形成された黒鉛系複合体の
機械的強度（曲げ強度）および高温領域（500℃）にお
ける摩擦摩耗特性を試験した結果を示すものである。The table below shows the results of testing the mechanical strength (flexural strength) and the frictional wear characteristics in the high temperature region (500 ° C.) of the graphite-based composite formed from the above-mentioned mixed powder.
表中の摩擦摩耗特性は、つぎの試験条件により行った結
果である。 The friction and wear characteristics in the table are the results obtained by the following test conditions.
＜試験条件＞ 黒鉛複合体の寸法：長さ20mm、幅20mm、厚さ7mmのブロ
ック状 相 手 材：外径18mm、内径14mm、長さ20mmのステンレ
ス鋼からなる筒状体 荷 重：２０kg/cm2 速 度：５m/min 試 験 機：鈴木式スラスト試験機 摩耗量は試験時間10時間後に測定した値である。<Test conditions> Dimensions of graphite composite: length 20 mm, width 20 mm, thickness 7 mm Block material: outer diameter 18 mm, inner diameter 14 mm, length 20 mm tubular body made of stainless steel Load: 20 kg / cm 2 Speed: 5 m / min Tester: Suzuki type thrust tester The amount of wear is the value measured after 10 hours of test time.
「作用・効果」 上述した構成からなる本発明の高温用ころがり軸受の保
持機は以下の特有の作用効果を奏する。"Operation / Effect" The cage for a high temperature rolling bearing of the present invention having the above-described configuration has the following unique operation effects.
転動体とのころがり接触部分は摺動特性に優れた黒鉛系
複合体で形成されているので、とくに高温領域での使用
において、該保持器から転動体表面に黒鉛被膜が形成さ
れ、該転動体が案内される内、外輪の軌道面に該転動体
から黒鉛被膜が移着形成されるので、安定したころがり
接触が行われる。Since the rolling contact portion with the rolling element is formed of a graphite-based composite having excellent sliding characteristics, a graphite coating is formed on the surface of the rolling element from the retainer, especially when used in a high temperature range. Since the graphite film is transferred and formed from the rolling element on the raceway surface of the outer ring while being guided, stable rolling contact is performed.
また、円孔周縁部分は高強度の黒鉛複合体で形成されて
いるので、該円孔内に転動体を嵌合するさい、当該部分
にヒビ割れ、破損を生じることがない。Further, since the peripheral portion of the circular hole is formed of the high-strength graphite composite, when the rolling element is fitted into the circular hole, the portion is not cracked or damaged.
「実施例」 以下、本発明の実施例について説明する。[Examples] Examples of the present invention will be described below.
この実施例は深みぞ玉軸受に使用される保持器について
である。This embodiment relates to a cage used for a deep groove ball bearing.
（原料粉末の調整） 粒度150μｍ以下の仮焼ピッチコークス粉末に、平均粒
度１．５μｍの炭化ホウ素粉末30重量％配合し、混合し
て該コークス粉末と炭化ホウ素粉末の均一な混合粉末を
得た（以下「混合粉末」という）。(Preparation of Raw Material Powder) 30% by weight of boron carbide powder having an average particle size of 1.5 μm was mixed with calcined pitch coke powder having a particle size of 150 μm or less and mixed to obtain a uniform mixed powder of the coke powder and the boron carbide powder. (Hereinafter referred to as "mixed powder").
次に、粒度150μｍ以下の仮焼ピッチコークス粉末に、
平均粒度７μｍの二ホウ化クロム粉末（元素周期律表の
第IVａ族）15重量％配合し、混合して該コークス粉末と
二ホウ化クロム(CrB2)粉末の均一な混合粉末を得た（以
下「混合粉末」という）。Next, a calcined pitch coke powder with a particle size of 150 μm or less,
15% by weight of chromium diboride powder (Group IVa of the Periodic Table of Elements) having an average particle size of 7 μm was mixed and mixed to obtain a uniform mixed powder of the coke powder and the chromium diboride (CrB 2 ) powder ( Hereinafter referred to as "mixed powder").
（製造方法） 内面に中空円筒部１、中央にコアロッド８を備えた黒鉛
型２を用意し、該黒鉛型２の中空円筒部１内に前記混合
粉末を充填し圧粉して該中空円筒部１内に混合粉末
の圧粉体を形成したのち、該圧粉体の上に前記混合粉末
を均一に充填し、圧粉して該中空円筒部１内に混合粉
末−混合粉末からなる二層の圧粉体を形成した（第
８図）。(Manufacturing Method) A graphite mold 2 having a hollow cylindrical portion 1 on the inner surface and a core rod 8 in the center is prepared, and the mixed powder is filled in the hollow cylindrical portion 1 of the graphite mold 2 and pressed to obtain the hollow cylindrical portion. After forming a green compact of the mixed powder in 1, the mixed powder is uniformly filled on the green compact, and pressed into the hollow cylindrical portion 1 to form a mixed powder-mixed powder double layer. A green compact of was formed (Fig. 8).
該中空円筒部１内に形成した二層の圧粉体を圧力220kg/
cm2の加圧下で、2200℃の温度で加圧・加熱焼結し、二
層の圧粉体が一体化した燒結円筒体（黒鉛体）を得た。The pressure of the two-layer green compact formed in the hollow cylindrical portion 1 is 220 kg /
It was pressed and heated and sintered at a temperature of 2200 ° C. under a pressure of cm 2 to obtain a sintered cylindrical body (graphite body) in which two layers of green compacts were integrated.
この加圧・加熱燒結過程で、仮焼ピッチコークスは黒鉛
化され、該円筒体の混合粉末部分は黒鉛を主体とし、
該黒鉛中に炭化ホウ素が分散含有された黒鉛系複合体
に、また混合粉末部分は黒鉛を主体とし、該黒鉛中に
二ホウ化クロムが分散含有された黒鉛系複合体に形成さ
れる。In this pressurizing / heating and sintering process, the calcined pitch coke is graphitized, and the mixed powder portion of the cylindrical body is mainly composed of graphite,
It is formed into a graphite-based composite in which boron carbide is dispersedly contained in the graphite, and a graphite-based composite in which the mixed powder portion is mainly composed of graphite and chromium diboride is dispersedly contained in the graphite.
このようにして得た燒結円筒体を、外径22.3mm、内径1
7.5mm、幅7.1mm（混合粉末部分の幅1.1mm）の寸法に
機械加工した。The sintered cylindrical body thus obtained, the outer diameter 22.3mm, inner diameter 1
It was machined to dimensions of 7.5 mm and width of 7.1 mm (width of mixed powder part 1.1 mm).
ついで、上記寸法の燒結円筒体の混合粉末部分に、周
縁が混合粉末と混合粉末の接合面に接するように円
周方向に直径4.86mmの円孔を規則正しく形成するととも
に該円孔に連続し、混合粉末と反対側の端面に開口す
る幅4.65mmの溝を形成し、二層の黒鉛系複合体からなる
保持器を得た（第６図）。Then, in the mixed powder portion of the sintered cylinder of the above dimensions, a circular hole having a diameter of 4.86 mm is regularly formed in the circumferential direction so as to contact the joint surface of the mixed powder and the mixed powder, and the circular hole is continuously formed. A groove having a width of 4.65 mm was formed on the end surface opposite to the mixed powder, and a cage composed of a two-layer graphite composite was obtained (Fig. 6).
この保持器を、外輪外径28mm、内輪内径12mm（外輪、内
輪ともステンレス鋼（SUS440C製））間に配列された窒
化ケイ素（Si3N4）からなる直径3/16″（4.76mm）の玉
（８個）に装着し、深みぞ玉軸受を形成した（第７
図）。This cage is made of silicon nitride (Si 3 N 4 ) arranged between outer ring outer diameter 28 mm and inner ring inner diameter 12 mm (both outer ring and inner ring made of stainless steel (SUS440C)) and has a diameter of 3/16 ″ (4.76 mm). Attached to balls (8 pieces) to form deep groove ball bearings (7th
Figure).
このようにして形成した深みぞ玉軸受について、下記の
条件で摩擦摩耗特性を試験した。The deep groove ball bearing thus formed was tested for friction and wear characteristics under the following conditions.
＜試験条件＞ 軸受温度：300℃ 回転数：100rpm ラジアル荷重：100kgf 試験時間：50Hr 試験機：オリエンテック社製ラジアルジャーナル試験機
（AFT-9-1） 上記試験より、ころがり摩擦係数は0.008〜0.01、軸受
摩耗量（ラジアル隙間）は最大60μｍであった。<Test conditions> Bearing temperature: 300 ° C Rotational speed: 100 rpm Radial load: 100kgf Test time: 50Hr Testing machine: Orientec radial journal testing machine (AFT-9-1) From the above test, rolling friction coefficient is 0.008-0.01 The maximum bearing wear amount (radial clearance) was 60 μm.
試験後の内、外輪の軌道面および玉の表面には黒鉛の薄
い被膜が形成されていることを確認した。After the test, it was confirmed that a thin coating of graphite was formed on the raceway surface of the outer ring and the surface of the ball.
また、試験後の黒鉛系複合体からなる保持器にはなんら
の損傷も認められなかった。Further, no damage was observed in the cage made of the graphite-based composite after the test.
一方、黒鉛単体で同様の保持器を形成し、同様の試験を
行ったが、このものは試験後、破損が認められた。On the other hand, the same cage was formed from graphite alone, and the same test was conducted, but this product was found to be damaged after the test.
第１図はアンギュラ玉軸受用保持器を示す斜視図、第２
図はその縦断面図、第３図はアンギュラ玉軸受を示す縦
断面図、第４図は第１図に示す保持器の製造方法を示す
縦断面図、第５図は深みぞ玉軸受用保持器を示す斜視
図、第６図はその縦断面図、第７図は深みぞ玉軸受を示
す縦断面図、第８図は第５図に示す保持器の製造方法を
示す縦断面図、第９図はスラスト玉軸受用保持器を示す
平面図、第１０図はスラスト玉軸受を示す縦断面図、第
１１図は第９図に示す保持器の製造方法を示す縦断面図
である。 符号の説明 １：中空円筒部、２：黒鉛型 Ａ，A1、A2：保持器、Ｂ：円孔 C1：高強度黒鉛系複合体部分 C2：摺動特性に優れた黒鉛系複合体部分FIG. 1 is a perspective view showing a cage for angular contact ball bearings, and FIG.
The figure is a longitudinal sectional view thereof, FIG. 3 is a longitudinal sectional view showing an angular contact ball bearing, FIG. 4 is a longitudinal sectional view showing a method of manufacturing the cage shown in FIG. 1, and FIG. 5 is a holding for deep groove ball bearings. FIG. 6 is a vertical sectional view showing the container, FIG. 6 is a vertical sectional view thereof, FIG. 7 is a vertical sectional view showing a deep groove ball bearing, and FIG. 8 is a vertical sectional view showing a method of manufacturing the cage shown in FIG. 9 is a plan view showing a cage for thrust ball bearings, FIG. 10 is a vertical sectional view showing the thrust ball bearings, and FIG. 11 is a longitudinal sectional view showing a method for manufacturing the cage shown in FIG. Explanation of symbols 1: Hollow cylindrical part, 2: Graphite type A, A 1 , A 2 : Cage, B: Circular hole C 1 : High strength graphite composite part C 2 : Graphite composite with excellent sliding properties Body part
Claims (6)
る転動体を嵌合抱持する円筒状保持器であって、該保持
器の周面には該転動体を嵌合抱持する複数個の円孔が形
成されており、該保持器はその両端からそれぞれ幅方向
に該円孔の周縁までの領域が黒鉛を主体とし該黒鉛中に
炭化ホウ素を分散含有した高強度の黒鉛系複合体で形成
されており、その他の領域が黒鉛を主体とし該黒鉛中に
金属ホウ化物あるいは金属ホウ化物および炭化ホウ素を
分散含有した摺動特性に優れた黒鉛系複合体で一体的に
形成されていることを特徴とする高温用ころがり軸受の
保持器。1. A cylindrical cage for fitting and holding a rolling element which is rolled and guided between raceways of an inner ring and an outer ring, wherein a plurality of the cages are fitted and embracing the rolling element on a peripheral surface of the cage. The cage is formed of a high-strength graphite-based composite in which the areas from both ends of the cage to the peripheral edge of the circle in the width direction are mainly made of graphite and boron carbide is dispersed and contained in the graphite. And the other region is mainly formed of graphite and is integrally formed of a graphite-based composite having excellent sliding characteristics, in which metal boride or metal boride and boron carbide are dispersedly contained in the graphite. A cage for high temperature rolling bearings, which is characterized in that
る転動体を嵌合抱持する円筒状保持器であって、該保持
器の周面には該転動体を嵌合抱持する複数個の円孔が該
保持器の一方の端面に開口する溝に連通して形成されて
おり、該保持器は該溝と反対側の端面から幅方向に該円
孔の周縁までの領域が黒鉛を主体とし該黒鉛中に炭化ホ
ウ素を分散含有した高強度の黒鉛系複合体で形成されて
おり、その他の領域が黒鉛を主体とし該黒鉛中に金属ホ
ウ化物あるいは金属ホウ化物および炭化ホウ素を分散含
有した摺動特性に優れた黒鉛系複合体で一体的に形成さ
れていることを特徴とする請求項１記載の高温用ころが
り軸受の保持器。2. A cylindrical retainer which fits and holds a rolling element which is rolled and guided between raceway surfaces of an inner ring and an outer ring, and a plurality of which retains and holds the rolling element on a peripheral surface of the retainer. Circular hole is formed so as to communicate with a groove that opens at one end surface of the cage, and the cage has a region from the end surface on the opposite side of the groove to the peripheral edge of the circular hole in the width direction of graphite. It is formed of a high-strength graphite-based composite mainly containing boron carbide dispersed in the graphite, and the other region mainly contains graphite and contains a metal boride or a metal boride and boron carbide dispersed therein. The cage for a high temperature rolling bearing according to claim 1, wherein the cage is integrally formed of a graphite-based composite having excellent sliding characteristics.
る転動体を嵌合抱持する円筒状保持器であって、該保持
器の端面にはその円周方向に該転動体を嵌合抱持する複
数個の円孔が形成されており、該保持器はその内周縁お
よび外周縁からそれぞれ該円孔の周縁までの領域が黒鉛
を主体とし該黒鉛中に炭化ホウ素を分散含有した高強度
の黒鉛系複合体で形成されており、その他の領域が黒鉛
を主体とし該黒鉛中に金属ホウ化物あるいは金属ホウ化
物および炭化ホウ素を分散含有した摺動特性に優れた黒
鉛系複合体で一体的に形成されていることを特徴とする
請求項１記載の高温用ころがり軸受の保持器。3. A cylindrical retainer which fits and holds a rolling element which is guided by rolling between raceway surfaces of an inner ring and an outer ring, wherein the rolling element is circumferentially fitted and held on an end surface of the retainer. A plurality of circular holes to be held are formed, and the retainer has a high strength in which the areas from the inner peripheral edge and the outer peripheral edge to the peripheral edge of the circular hole are mainly made of graphite and boron carbide is dispersed and contained in the graphite. Other regions are mainly composed of graphite, and a metal boride or a metal boride and boron carbide dispersed and contained in the graphite are contained in the graphite composite excellent in sliding property and integrated. The cage for a high temperature rolling bearing according to claim 1, characterized in that
クス粉末を主成分とし、これに５〜40重量％の炭化ホウ
素粉末を配合した混合粉末を加圧・加熱燒結して形成し
た燒結体からなることを特徴とする請求項１乃至３いず
れかの記載の高温用ころがり軸受の保持器。4. A high-strength graphite-based composite is formed by calcination and heating of a mixed powder containing calcinated pitch coke powder as a main component and 5 to 40% by weight of boron carbide powder. The cage for a high temperature rolling bearing according to any one of claims 1 to 3, which is made of a sintered body.
ッチコークス粉末を主成分とし、これに元素周期律表の
第IVａ族、第Ｖａ族および第VIａ族の金属のホウ化物粉
末５〜20重量％配合した混合粉末を加圧・加熱燒結して
形成した燒結体からなることを特徴とする請求項１乃至
３いずれかの記載の高温用ころがり軸受の保持器。5. A graphite-based composite having excellent sliding properties, which comprises calcinated pitch coke powder as a main component and a boride of a metal of Group IVa, Va or VIa of the Periodic Table of Elements. The cage for a high temperature rolling bearing according to any one of claims 1 to 3, wherein the cage comprises a sintered body formed by sintering a mixed powder containing 5 to 20% by weight of powder under pressure and heating.
ッチコークス粉末を主成分とし、これに元素周期律表の
第IVａ族、第Ｖａ族および第VIａ族の金属のホウ化物粉
末およびあるいは金属の炭化物粉末５〜20重量％および
炭化ホウ素粉末５〜20重量％配合した混合粉末を加圧・
加熱燒結して形成した燒結体からなることを特徴とする
請求項１乃至３いずれかの記載の高温用ころがり軸受の
保持器。6. A graphite-based composite having excellent sliding properties, which comprises calcinated pitch coke powder as a main component, and a boride of a metal of group IVa, group Va or group VIa of the periodic table of elements. Powder and / or mixed powder containing 5 to 20 wt% of metal carbide powder and 5 to 20 wt% of boron carbide powder is pressed.
The cage for a high temperature rolling bearing according to any one of claims 1 to 3, comprising a sintered body formed by heating and sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19615988A JPH0612130B2 (en) | 1988-08-08 | 1988-08-08 | Roller bearing cage for high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19615988A JPH0612130B2 (en) | 1988-08-08 | 1988-08-08 | Roller bearing cage for high temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0246317A JPH0246317A (en) | 1990-02-15 |
| JPH0612130B2 true JPH0612130B2 (en) | 1994-02-16 |
Family
ID=16353188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19615988A Expired - Fee Related JPH0612130B2 (en) | 1988-08-08 | 1988-08-08 | Roller bearing cage for high temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612130B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03272320A (en) * | 1990-03-20 | 1991-12-04 | Toyo Tanso Kk | Rolling bearing holder member and rolling bearing with built-in holder member |
| JP2013079715A (en) * | 2011-09-22 | 2013-05-02 | Ntn Corp | Solid lubricating rolling bearing |
| CN102852977B (en) * | 2012-08-30 | 2015-09-09 | 上海斐赛轴承科技有限公司 | Split assembled enclosed carbon graphite retainer rolling bearing and making method |
-
1988
- 1988-08-08 JP JP19615988A patent/JPH0612130B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0246317A (en) | 1990-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3597866B2 (en) | Sliding bearing using non-lubricated bearing material and such bearing material | |
| WO2012067378A2 (en) | Sliding bearing having improved lubrication characteristics | |
| JP3549239B2 (en) | Rolling bearing | |
| EP0404571A1 (en) | Sliding member | |
| JPS6313953B2 (en) | ||
| KR101060863B1 (en) | Ceramic sintered body, sliding parts using the same, and ceramic sintered body manufacturing method | |
| US4720349A (en) | Sliding member of graphite-metal borides | |
| JPH0612130B2 (en) | Roller bearing cage for high temperature | |
| JP5878062B2 (en) | Plain bearing | |
| JPH0238365A (en) | Complex sliding member of high-temperature-reisistant and high-strength graphite base | |
| JPS6136173A (en) | High temperature solid lubricating ceramics | |
| JPH0550475B2 (en) | ||
| JP6905926B2 (en) | Sliding member | |
| JP3650739B2 (en) | SLIDING BODY, MANUFACTURING METHOD THEREOF, AND MECHANICAL SEAL | |
| JP2610856B2 (en) | Wear-resistant surface layer and method of forming the same | |
| JPH0566899B2 (en) | ||
| JP4002406B2 (en) | Slider and mechanical seal | |
| JPS6119849B2 (en) | ||
| CN110925311B (en) | Surface self-lubricating metal ceramic sliding bearing and preparation method thereof | |
| JPH1047359A (en) | Rolling bearing | |
| JP3629300B2 (en) | Rolling / sliding parts and rollers for cam followers | |
| JP2543093B2 (en) | Sliding parts for seals | |
| JP3567497B2 (en) | Rolling bearings used in molten metal | |
| JPS63282233A (en) | Heat-resisting cage for rolling bearing | |
| JPH08158001A (en) | Sliding material made of cermet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |