JPS62266216A - Ceramics bearing and its production - Google Patents
Ceramics bearing and its productionInfo
- Publication number
- JPS62266216A JPS62266216A JP10788086A JP10788086A JPS62266216A JP S62266216 A JPS62266216 A JP S62266216A JP 10788086 A JP10788086 A JP 10788086A JP 10788086 A JP10788086 A JP 10788086A JP S62266216 A JPS62266216 A JP S62266216A
- Authority
- JP
- Japan
- Prior art keywords
- inner member
- ceramics
- ceramic
- maximum diameter
- minimum diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 2
- 238000001354 calcination Methods 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
及凪み旦追
[産業上の利用分野]
本発明は、セラミックスで構成される、すべり軸受に関
する。 本発明は、そのようなセラミックス軸受の製造
方法をも包含する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sliding bearing made of ceramics. The present invention also includes a method of manufacturing such a ceramic bearing.
[従来の技術]
近年のファイン・セラミックス技術の進歩につれて入手
できるようになった新しいセラミックス材料は、耐熱性
、耐薬品性などの従来のセラミックスの特性に加えて、
耐摩耗性と摩擦係数が小さいという利点を生かして、加
熱炉内のスキッドレールなどに利用されている。[Conventional technology] New ceramic materials that have become available as fine ceramic technology has advanced in recent years have the characteristics of conventional ceramics, such as heat resistance and chemical resistance.
Taking advantage of its wear resistance and low coefficient of friction, it is used for things such as skid rails in heating furnaces.
一方、各種産業および民生機械の小型化、高性能化に伴
って、回転軸を支えるベアリングはいっそう小型軽量で
、高荷重、高回転に耐えることが要求される。 軸受用
材料とする特殊鋼の改良と加工技術の進歩が、この要求
にこたえる努力を続けているが、なお十分に満足できる
ものではない。On the other hand, as various industrial and consumer machines become smaller and more sophisticated, the bearings that support rotating shafts are required to be smaller and lighter, and to withstand high loads and high rotations. Efforts are being made to meet this demand through improvements in special steel used as bearing materials and advances in processing technology, but the results are still not fully satisfactory.
[発明が解決しようとする問題点]
本発明の目的は、上記のような技術の現状を一歩進めて
、セラミックスを材料とする、従来の鋼製のものより性
能がすぐれた軸受を提供することにある。 そのような
セラミックス軸受の製造方法を提供することもまた、本
発明の目的に含まれる。[Problems to be Solved by the Invention] The purpose of the present invention is to take the current state of the art as described above one step further and provide a bearing that is made of ceramic and has superior performance than conventional steel bearings. It is in. It is also an object of the present invention to provide a method for manufacturing such a ceramic bearing.
発明の構成
[問題点を解決するための手段1
図面を参照して説明すれば、本発明のセラミックス軸受
は、外に向って凸または凹の断面、図示した例ではV字
形に凹な断面を軸Aのまわりに回転させて得た形状を有
するセラミックス製の内側部材1と、それを囲んで、内
側部材1の外面形状に対応する、図示した例では曲線、
それもほぼ円弧の一部を回転させて得た内面形状を有す
るセラミックス製の内側部2とからなり、内側部材の最
大径DIを外側部材の最小径り。より大きくしたことを
特徴とする。Structure of the Invention [Means for Solving Problems 1] Describing with reference to the drawings, the ceramic bearing of the present invention has an outwardly convex or concave cross section, in the illustrated example a V-shaped concave cross section. An inner member 1 made of ceramics having a shape obtained by rotating around the axis A, and surrounding it a curved line in the illustrated example, which corresponds to the outer shape of the inner member 1.
It also consists of an inner part 2 made of ceramics having an inner surface shape obtained by rotating a part of an approximately circular arc, and the maximum diameter DI of the inner member is the minimum diameter of the outer member. It is characterized by being larger.
内側部材の最大径DIと外側部材の最小径り。The maximum diameter DI of the inner member and the minimum diameter of the outer member.
との差は、両者が軸方向の推力に耐してベアリングとし
ての構成を保ち得る限界以上であればよい。It is sufficient that the difference between the two is at least a limit that allows both to withstand the thrust in the axial direction and maintain the structure as a bearing.
通常、少なくとも2μおれば足り、10μまたはそれ以
上あれば安全である。Usually, at least 2μ is sufficient, and 10μ or more is safe.
このセラミックス軸受は、一般に注油不要であるが、用
途によってはもちろん注油してもよく、その場合にそな
えて、外側部材に第1図に示したように、注油孔5を設
けておくとよい。Although this ceramic bearing generally does not require lubrication, it may of course be lubricated depending on the application, and in preparation for this, it is preferable to provide a lubrication hole 5 in the outer member as shown in FIG.
本発明のセラミックス軸受には種々の態様があり得る。The ceramic bearing of the present invention may have various embodiments.
たとえば、第1図に示した例は内側部材の外面が凹で
あって外側部材の内面が凸であるが、第2図に示すよう
に、これと逆な関係であってもよい。 また、シャフト
3も、第1図の例で。For example, in the example shown in FIG. 1, the outer surface of the inner member is concave and the inner surface of the outer member is convex, but as shown in FIG. 2, the relationship may be reversed. Also, the shaft 3 is also the same as the example shown in FIG.
はスチールなどの、内側部材とは異なる材料を用いて、
圧入、冷しばめ、接着などの手段で一体化しているが、
第2図に示ずように、内側部材1とシャフト3とをもと
もと一体にHaすることもできる。is made of a different material than the inner member, such as steel,
They are integrated using methods such as press fitting, cold fitting, and gluing.
As shown in FIG. 2, the inner member 1 and the shaft 3 can also be integrally formed.
本発明のセラミックス軸受の製造方法は、第3図に示す
ように、外に向って凸または凹の断面、図示した例では
V字形に凹な断面を軸Aのまわりに回転させて得た形状
を有するセラミックス製の内側部材を用意し、その周囲
を、内側部材の外面形状に対応する内面形状を有するが
最小径d。が内側部材の最大径DIより大きい、焼成に
よりセラミックスを形成する素材2A、たとえば粉末を
バインダーとともに成形したもので囲み、全体を所要温
度に所要時間保持して焼結することにより、外側部材の
素材2Aをセラミックス化するとともに、第4図に示す
ようにその最小径を内側部材の最大径より小さくするこ
とを特徴とする。 セラミックスとしては、アルミナ、
ジルコニア、窒化ケイ素その他のファイン・セラミック
スが好適であって、製品である軸受の用途に応じて選択
すればよい。As shown in FIG. 3, the method for manufacturing a ceramic bearing of the present invention is to obtain a shape obtained by rotating an outwardly convex or concave cross section, in the illustrated example, a V-shaped concave cross section, around an axis A. An inner member made of ceramic is prepared, and its periphery has an inner surface shape corresponding to the outer surface shape of the inner member, but a minimum diameter d. is larger than the maximum diameter DI of the inner member, and is surrounded by a material 2A that forms ceramics by firing, such as a powder formed with a binder, and is sintered by holding the whole at a required temperature for a required time to form the material of the outer member. 2A is made of ceramic, and its minimum diameter is smaller than the maximum diameter of the inner member, as shown in FIG. Ceramics include alumina,
Zirconia, silicon nitride, and other fine ceramics are suitable, and may be selected depending on the intended use of the bearing product.
内側部材は、その外面を研摩して、芯を出すとともに平
滑にしておくことが好ましい。Preferably, the outer surface of the inner member is ground to core and smooth.
[作 用1
焼結によるセラミックスの形成には収縮が伴うから、外
側部材の素材2Aは最小径が小さくなって容易に内側部
材の最大径より小さくなる。 その結果、内外二つの部
材は、もはや軸方向に後けることがなくなる。 収縮の
度合を、外側部材が内側部材を締めつけるに至る限界に
止めておけば、回転は自在である。[Function 1] Since the formation of ceramics by sintering is accompanied by shrinkage, the minimum diameter of the material 2A of the outer member becomes smaller and easily becomes smaller than the maximum diameter of the inner member. As a result, the two members, the inner and outer parts, no longer move backward in the axial direction. As long as the degree of contraction is kept at a limit where the outer member tightens the inner member, rotation is possible.
よく焼き締まった、ち密なセラミックスの平滑な表面ど
うしは、驚くほど摩擦係数が低く、軸受として高性能を
示す。 従って、すべり軸受の一種であるが、スラスト
軸受にも、ラジアル軸受にも使用できる。 いうまでも
なく耐摩耗性はすぐれているから、長時間の使用にも耐
える。The smooth surfaces of well-hardened, dense ceramics have surprisingly low coefficients of friction, and exhibit high performance as bearings. Therefore, although it is a type of sliding bearing, it can also be used as a thrust bearing or a radial bearing. Needless to say, it has excellent wear resistance, so it can withstand long-term use.
[実施例]
第3図に示す形状を有する最大径D1=7gの内側部材
を、アルミナ粉末の成形および焼結によって製作し、そ
の表面を研摩した。[Example] An inner member having the shape shown in FIG. 3 and having a maximum diameter D1 of 7 g was manufactured by molding and sintering alumina powder, and its surface was polished.
同じアルミナ粉末を成形し、やはり第3図に示す形状を
有し、最小径d□=4mの素材を用意した。The same alumina powder was molded to prepare a material having the shape shown in FIG. 3 and having a minimum diameter d□=4 m.
素材2Aの中に内側部材1を入れた状態で炉に入れ、焼
結することにより、第4図に示す断面形状のセラミック
ス軸受を得た。 素材の焼結に伴う収縮は、外側の径の
縮少の度合からみて、約22%である。A ceramic bearing having the cross-sectional shape shown in FIG. 4 was obtained by putting the inner member 1 into the material 2A in a furnace and sintering it. The shrinkage due to sintering of the material is approximately 22% in terms of the degree of reduction in the outer diameter.
このセラミックス軸受にlit製のシャフトを圧入し、
外側部材を固定しベアリングに3009の荷重をかけた
状態で、シVフトの一端を回転速度約6000 rl)
mで駆動した。 連続210日間の使用俊も、軸受はそ
の性能を維持していた。 比較のために同じ条件で試験
したほぼ同じ大きざの鋼製ミニチュアベアリングは、1
50日間の運転で摩耗して機能を失うに至った。Press-fit a lit shaft into this ceramic bearing,
With the outer member fixed and a load of 3009 applied to the bearing, rotate one end of the shaft at a rotational speed of approximately 6000 rl)
It was driven by m. The bearing maintained its performance even after 210 consecutive days of use. For comparison, a steel miniature bearing of approximately the same size tested under the same conditions was 1
After 50 days of operation, it wore out and lost its functionality.
発明の効果
本発明のセラミックス軸受は、在来のllI製軸受より
著しく耐久性が高い。 従って、長期間にわたる連続運
転を要する機器や、メンテナンスに困難の伴うような用
途に適している。セラミックスに固有の、耐薬品性、耐
酸性、耐塩水性などの特性もあるから、各種化学プラン
トや船舶用にも役立つ。 また耐熱性があることはいう
までもないから、潤滑油が使えない温度や、さらに高い
温度で用いる軸受として有用である。 摩耗が少ないと
いう利点は、たとえばIC製造のためのクリーンルーム
内で使用するキャスターなどの用途にも向けられること
を意味する。Effects of the Invention The ceramic bearing of the present invention has significantly higher durability than the conventional III bearing. Therefore, it is suitable for equipment that requires continuous operation over a long period of time, and for applications where maintenance is difficult. It also has properties unique to ceramics, such as chemical resistance, acid resistance, and salt water resistance, making it useful for various chemical plants and ships. It goes without saying that it is heat resistant, so it is useful as a bearing used at temperatures where lubricating oil cannot be used, or at even higher temperatures. The advantage of low wear means that it can also be used in applications such as casters used in clean rooms for IC manufacturing, for example.
第1図および第2図は、ともに本発明のセラミックス軸
受の例を示す断面図である。
第3図および第4図は、本発明のセラミックス軸受の製
造方法を説明するための模式的な断面図であって、第3
図は焼結前の状態を、また第4図は焼結後の状態を、そ
れぞれ示す。
1・・・内側部材
2・・・外側部材 2A・・・外側部材の素材3・・
・シャフト
Dl・・・内側部材の最大径
Do・・・外側部材の最小径
do・・・素材の最小径
特許出願人 小 林 寿 大同 新
穂新二FIG. 1 and FIG. 2 are both sectional views showing examples of the ceramic bearing of the present invention. 3 and 4 are schematic cross-sectional views for explaining the method of manufacturing a ceramic bearing of the present invention, and FIG.
The figure shows the state before sintering, and FIG. 4 shows the state after sintering. 1...Inner member 2...Outer member 2A...Outer member material 3...
・Shaft Dl...Maximum diameter Do of inner member...Minimum diameter do of outer member...Minimum diameter of material Patent applicant Hisashi Kobayashi Daido Shinji Niho
Claims (6)
させて得た形状を有するセラミックス製の内側部材と、
それを囲んで、内側部材の外面形状に対応する内面形状
を有するセラミックス製の外側部材とからなり、内側部
材の最大径を外側部材の最小径より大きくしたことを特
徴とするセラミックス軸受。(1) An inner member made of ceramics having a shape obtained by rotating an outwardly convex or concave cross section around an axis;
A ceramic bearing comprising a ceramic outer member surrounding the inner member and having an inner surface shape corresponding to the outer surface shape of the inner member, the inner member having a maximum diameter larger than a minimum diameter of the outer member.
μ以上である特許請求の範囲第1項のセラミックス軸受
。(2) The difference between the maximum diameter of the inner member and the minimum diameter of the outer member is 2
The ceramic bearing according to claim 1, which has a diameter of μ or more.
範囲第1項のセラミックス軸受。(3) The ceramic bearing according to claim 1, wherein the outer member is provided with a radial oiling hole.
素その他のファイン・セラミックスからえらんだもので
ある特許請求の範囲第1項のセラミックス軸受。(4) The ceramic bearing according to claim 1, wherein the ceramic is selected from alumina, zirconia, silicon nitride, and other fine ceramics.
させて得た形状を有するセラミックス製の内側部材を用
意し、その周囲を、内側部材の外面形状に対応する内面
形状を有するが最小径が内側部材の最大径より大きい、
焼成によりセラミックスを形成する素材で囲み、焼成す
ることにより外側部材の素材をセラミックス化するとと
もに、その最小径を内側部材の最大径より小さくするこ
とを特徴とするセラミックス軸受の製造方法。(5) A ceramic inner member having a shape obtained by rotating an outwardly convex or concave cross section around an axis is prepared, and the periphery thereof has an inner surface shape corresponding to the outer surface shape of the inner member. has a minimum diameter greater than the maximum diameter of the inner member,
A method for manufacturing a ceramic bearing, characterized in that the outer member is surrounded by a material that forms ceramics by firing, the outer member is made of ceramic by firing, and the minimum diameter of the outer member is made smaller than the maximum diameter of the inner member.
する特許請求の範囲第5項のセラミックス軸受の製造方
法。(6) The method for manufacturing a ceramic bearing according to claim 5, which is carried out by polishing the surface of the inner member in advance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61107880A JP2503969B2 (en) | 1986-05-12 | 1986-05-12 | Ceramic bearing and method of manufacturing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61107880A JP2503969B2 (en) | 1986-05-12 | 1986-05-12 | Ceramic bearing and method of manufacturing the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62266216A true JPS62266216A (en) | 1987-11-19 |
JP2503969B2 JP2503969B2 (en) | 1996-06-05 |
Family
ID=14470424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61107880A Expired - Fee Related JP2503969B2 (en) | 1986-05-12 | 1986-05-12 | Ceramic bearing and method of manufacturing the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2503969B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63308217A (en) * | 1987-06-05 | 1988-12-15 | Toto Ltd | Bearing made of ceramics and its manufacture |
JPH02173415A (en) * | 1988-12-26 | 1990-07-04 | Uingu Haisera:Kk | Ceramic bearing and its manufacture |
JPH02173414A (en) * | 1988-12-26 | 1990-07-04 | Uingu Haisera:Kk | Ceramic bearing |
JPH02173417A (en) * | 1988-12-26 | 1990-07-04 | Uingu Haisera:Kk | Ceramic bearing |
US5094550A (en) * | 1989-10-12 | 1992-03-10 | Wing Highcera Co., Ltd. | Ceramic bearing |
JP2011220526A (en) * | 2010-04-13 | 2011-11-04 | Johnson Electric Sa | Bearing assembly |
JP2020015253A (en) * | 2018-07-26 | 2020-01-30 | 日本特殊陶業株式会社 | Ceramic composite body and method for producing the same |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51133649A (en) * | 1975-05-16 | 1976-11-19 | Toyohiko Naono | Sliding mechanism |
JPS5738926U (en) * | 1980-08-14 | 1982-03-02 | ||
JPS5842420U (en) * | 1981-09-16 | 1983-03-22 | オリジン電気株式会社 | plain bearing |
JPS60200902A (en) * | 1984-03-26 | 1985-10-11 | Canon Inc | Production of bearing |
-
1986
- 1986-05-12 JP JP61107880A patent/JP2503969B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51133649A (en) * | 1975-05-16 | 1976-11-19 | Toyohiko Naono | Sliding mechanism |
JPS5738926U (en) * | 1980-08-14 | 1982-03-02 | ||
JPS5842420U (en) * | 1981-09-16 | 1983-03-22 | オリジン電気株式会社 | plain bearing |
JPS60200902A (en) * | 1984-03-26 | 1985-10-11 | Canon Inc | Production of bearing |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63308217A (en) * | 1987-06-05 | 1988-12-15 | Toto Ltd | Bearing made of ceramics and its manufacture |
JPH0535767B2 (en) * | 1987-06-05 | 1993-05-27 | Toto Ltd | |
JPH02173415A (en) * | 1988-12-26 | 1990-07-04 | Uingu Haisera:Kk | Ceramic bearing and its manufacture |
JPH02173414A (en) * | 1988-12-26 | 1990-07-04 | Uingu Haisera:Kk | Ceramic bearing |
JPH02173417A (en) * | 1988-12-26 | 1990-07-04 | Uingu Haisera:Kk | Ceramic bearing |
US5094550A (en) * | 1989-10-12 | 1992-03-10 | Wing Highcera Co., Ltd. | Ceramic bearing |
JP2011220526A (en) * | 2010-04-13 | 2011-11-04 | Johnson Electric Sa | Bearing assembly |
JP2020015253A (en) * | 2018-07-26 | 2020-01-30 | 日本特殊陶業株式会社 | Ceramic composite body and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JP2503969B2 (en) | 1996-06-05 |
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