JP2551437B2 - Solid lubricant - Google Patents
Solid lubricantInfo
- Publication number
- JP2551437B2 JP2551437B2 JP62238278A JP23827887A JP2551437B2 JP 2551437 B2 JP2551437 B2 JP 2551437B2 JP 62238278 A JP62238278 A JP 62238278A JP 23827887 A JP23827887 A JP 23827887A JP 2551437 B2 JP2551437 B2 JP 2551437B2
- Authority
- JP
- Japan
- Prior art keywords
- solid lubricant
- lead
- lubricating oil
- vol
- ptfe
- 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
- Lubricants (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、軸受などの摺動面に穿たれた穴あるいは溝
に埋め込んで使用するのに有用な固体潤滑剤に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a solid lubricant useful for embedding in a hole or groove formed in a sliding surface of a bearing or the like for use.
＜従来の技術＞ 従来、この種の固体潤滑剤としては、層状構造を持つ
もの、なかでもとくに黒鉛を主成分とするものが賞用さ
れている。黒鉛は、層状構造のため荷重方向に対しては
大きい抵抗力を示すが、すべり方向に対しては抵抗力が
小さく、しかも軟質であり、さらに常温からかなりの高
温まで潤滑性能を保つことができる。<Prior Art> Conventionally, as this type of solid lubricant, one having a layered structure, especially one containing graphite as a main component, has been favored. Graphite has a large resistance force in the loading direction due to its layered structure, but has a low resistance force in the sliding direction and is soft, and can maintain lubricating performance from room temperature to a considerably high temperature. .
軸受などの摺動面に埋め込まれて使用されるこのよう
な固体潤滑剤は、摺動面に適当な薄膜として形成されて
はじめて有用なものであり、被膜形成の巧拙が摩擦係数
および被膜の寿命に大きな影響をおよぼす。Such solid lubricants that are used by being embedded in sliding surfaces such as bearings are useful only when they are formed as a suitable thin film on the sliding surface. The skill of film formation depends on the coefficient of friction and the life of the film. Have a great effect on.
しかしながら、前述の黒鉛を主成分とした固体潤滑剤
は、被膜の形成能がやゝ不足するとともに、繰り返し摩
擦に対するその被膜の寿命の点でも充分でない。そのた
め、高荷重用途には不向きであった。However, the above-mentioned solid lubricant containing graphite as a main component is not sufficient in the ability to form a coating film, and the life of the coating film against repeated friction is not sufficient. Therefore, it was not suitable for high load applications.
一方、高荷重用途に使用される固体潤滑剤としては、
四フッ化エチレン樹脂（以下、PTFEと言う。）と、イン
ジウム・鉛・錫などの軟質金属、さらに炭化水素系ワッ
クス・高級脂肪酸のエステル・金属石ケンなどのワック
スを配合したものがある。とくにその中でも、PTFEと鉛
およびワックスを配合したものが広く使用されている。On the other hand, as a solid lubricant used for high load applications,
There are blends of tetrafluoroethylene resin (hereinafter referred to as PTFE), soft metals such as indium, lead, and tin, and waxes such as hydrocarbon wax, higher fatty acid ester, and metal soap. Especially, among them, those containing PTFE, lead and wax are widely used.
この固体潤滑剤は高荷重条件下においては、摩擦係数
がきわめて低く、また被膜の形成能にすぐれ、該被膜の
寿命も長く、さらに被膜の自己補修性にもすぐれてい
る。This solid lubricant has a very low coefficient of friction under a high load condition, an excellent film forming ability, a long life of the film, and a self-repairing property of the film.
＜発明が解決しようとする問題点＞ しかしながら、近年の機械装置の大型化・高性能化に
ともない、このような固体潤滑剤を埋め込んだ摺動材に
は、さらに高荷重の負荷能力および広範囲の温度下での
使用を要求されてきた。<Problems to be Solved by the Invention> However, with the recent increase in size and performance of mechanical devices, a sliding material having such a solid lubricant embedded therein has a higher load capacity and a wider range. It has been required to be used under temperature.
荷重の負荷能力の向上のためには、潤滑油との併用が
考えられるが、それには固体潤滑剤の耐油性が要求され
る。In order to improve the load carrying capacity of the load, it may be used in combination with a lubricating oil, which requires the oil resistance of the solid lubricant.
従来のPTFE・鉛およびワックスからなる固体潤滑剤
は、その成分中に多量のワックスが配合されている。そ
のため、該固体潤滑剤をペレット状にして摺動面に埋め
込んだ場合、該ワックスの融点以上の温度で使用する
と、該固体潤滑剤の変形などを惹起し、ペレットが抜け
でるなどの不具合を生じる。さらに被膜の形成能および
寿命も熱により低下をきたし、使用温度の範囲がきわめ
て狭い。A conventional solid lubricant composed of PTFE / lead and wax contains a large amount of wax in its components. Therefore, when the solid lubricant is formed into pellets and embedded in the sliding surface, if the wax is used at a temperature equal to or higher than the melting point of the wax, the solid lubricant may be deformed and the pellets may come off. . Furthermore, the film forming ability and the life of the film are also lowered by heat, and the operating temperature range is extremely narrow.
また、潤滑油との併用においても、該ワックス成分が
潤滑油に溶解するため同様の不具合を生じる。Even when used in combination with a lubricating oil, the wax component dissolves in the lubricating oil, causing similar problems.
本発明は、このような問題点を解決すべくなされたも
のである。The present invention has been made to solve such problems.
すなわち、本発明の目的は、高温雰囲気においても使
用可能な耐熱性のある固体潤滑剤を提供することにあ
る。That is, an object of the present invention is to provide a heat-resistant solid lubricant that can be used even in a high temperature atmosphere.
さらに、本発明の他の目的は、グリースなどの潤滑油
との併用が可能な耐油性のある固体潤滑剤を提供するこ
とにある。Still another object of the present invention is to provide an oil-resistant solid lubricant that can be used in combination with a lubricating oil such as grease.
＜問題点を解決するための手段＞ 本発明は、軸受などの摺動面に穿たれた穴あるいは溝
に埋め込んで使用する固体潤滑剤であって、体積比で、
四フッ化エチレン樹脂20〜70％、鉛20〜70％、潤滑油５
〜20％からなる固体潤滑剤を提供するものである。<Means for Solving Problems> The present invention is a solid lubricant used by embedding it in a hole or groove formed in a sliding surface of a bearing or the like, in a volume ratio,
Tetrafluoroethylene resin 20-70%, lead 20-70%, lubricating oil 5
-20% solid lubricant.
＜作用＞ つぎに各成分の作用効果および限定理由について述べ
る。<Action> Next, the action and effect of each component and the reason for limitation will be described.
成分中のPTFEは、摩擦係数が非常に小さく、かつステ
ィックスリップを起こさせない効果を有し、熱的・化学
的にきわめて安定している。その配合量が20vol％以下
では上述した効果がなく、また70vol％を越えて配合す
ると固体潤滑被膜の強度を低下させる。したがって、PT
FEの配合量は、20〜70vol％が適当である。PTFE in the component has a very small coefficient of friction, has the effect of not causing stick-slip, and is extremely stable thermally and chemically. If the blending amount is 20 vol% or less, the above effect is not obtained, and if the blending amount exceeds 70 vol%, the strength of the solid lubricating coating is lowered. Therefore, PT
An appropriate amount of FE blended is 20 to 70 vol%.
鉛は、摩擦摺動面に介在して摩擦面の微細な凹凸を埋
めてこれを滑らかにし、かつ焼き付きを防止する効果が
ある。その配合量が20vol％以下では上述した効果がな
く、また70vol％を越えて配合すると軸受摺動面に埋め
込んで使用するペレットにした際の強度を低下させる。
したがって、鉛の配合量は、20〜70vol％が適当であ
る。Lead intervenes in the frictional sliding surface to fill fine irregularities on the frictional surface, smooth it, and prevent seizure. If the blending amount is 20 vol% or less, the above effect is not obtained, and if the blending amount exceeds 70 vol%, the strength of the pellets embedded in the bearing sliding surface is reduced.
Therefore, 20 to 70 vol% is suitable for the amount of lead compounded.
潤滑油は、従来の固体潤滑剤に含有されているワック
スに代わるものであり、ワックスと同様被膜の自己補修
性を助長する。その配合量が5vol％以下では上述した効
果が無く、20vol％を越えて配合すると鉛と同様ペレッ
トにした際の強度を低下させる。したがって、潤滑油の
添加量は、５〜20vol％が適当である。Lubricating oil replaces the wax contained in conventional solid lubricants and, like wax, promotes the self-healing properties of the coating. If the blending amount is 5 vol% or less, the above-mentioned effect is not obtained, and if blending exceeds 20 vol%, the strength of pelletized lead is reduced like lead. Therefore, 5 to 20 vol% is suitable for the amount of lubricating oil added.
＜実施例＞ 以下、本発明の固体潤滑剤の実施例について、詳細に
説明する。<Examples> Examples of the solid lubricant of the present invention will be described in detail below.
〔実施例−１および比較例−１〕 いずれも体積比で、PTFE粉末（三井フロロケミカル社
製・テフロン7A−Ｊ）50％、鉛粉（福田金属箔粉工業社
製・噴霧鉛粉−280メッシュ）40％を混合撹拌し、プレ
ス成形機により約210kg/cm2で加圧成形し、直径6mm、長
さ7mmの円柱状のペレットを得た。該ペレットを潤滑油
（モービル社製・DTEエキストラヘビーオイル）の入っ
た油槽に漬け、10％の潤滑油を含浸させた。[Example-1 and Comparative Example-1] 50% by volume of PTFE powder (Teflon 7A-J manufactured by Mitsui Fluorochemicals Co., Ltd.) and lead powder (sprayed lead powder manufactured by Fukuda Metal Foil & Powder Co., Ltd.-280) (Mesh) 40% was mixed and stirred, and pressure-molded with a press molding machine at about 210 kg / cm 2 to obtain a cylindrical pellet having a diameter of 6 mm and a length of 7 mm. The pellets were dipped in an oil tank containing a lubricating oil (DTE extra heavy oil manufactured by Mobil) to impregnate 10% of the lubricating oil.
このようにして得られた本発明の固体潤滑剤のペレッ
トと従来のPTFE・鉛・ワックスからなる固体潤滑剤のペ
レットとの耐熱性および耐油性についての比較実験を行
った。Comparative experiments were conducted on the heat resistance and oil resistance of the pellets of the solid lubricant of the present invention thus obtained and the pellets of the conventional solid lubricant of PTFE / lead / wax.
実験は、本発明品と比較品をエンジンオイル（SAE30
相当）中に浸し、該エンジンオイルを120℃に加熱し10
分間保持した後室温まで冷却する。この加熱−保持−冷
却のサイクルを繰り返し、両ペレットの変形状態を観察
した。Experiments were conducted using engine oil (SAE30
Equivalent)) and heat the engine oil to 120 ° C for 10
Hold for minutes and cool to room temperature. This heating-holding-cooling cycle was repeated to observe the deformed state of both pellets.
比較品のペレットは、わずか１回目の加熱後ワックス
成分が溶け出し、変形を生じた。しかしながら、本発明
品のペレットは、20回のサイクルを繰り返した後も原形
を保ち、また強度の低下もなかった。The pellets of the comparative product were deformed due to the melting of the wax component after only the first heating. However, the pellets of the product of the present invention maintained their original shape after repeating 20 cycles and had no decrease in strength.
〔実施例−２〜７および比較例−２〜５〕 実施例−２〜７も実施例１と同様、PTFE粉末（三井フ
ロロケミカル社製・テフロン7A−Ｊ）20〜70vol％、鉛
粉（福田金属箔粉工業社製・噴霧鉛粉−280メッシュ）2
0〜70vol％を混合撹拌し、プレス成形機により加圧成形
し、直径6mm、長さ7mmの円柱状のペレットを得た後、該
ペレットを潤滑油（モービル社製・DTEエキストラヘビ
ーオイル）の入った油槽に漬け、該潤滑油５〜20vol％
を含浸させた。[Examples 2 to 7 and Comparative Examples 2 to 5] In Examples 2 to 7 as well, in the same manner as in Example 1, PTFE powder (Teflon 7A-J manufactured by Mitsui Fluorochemical Co.) 20 to 70 vol%, lead powder ( Fukuda Metal Foil & Powder Co., Ltd./Sprayed lead powder-280 mesh) 2
After mixing and stirring 0 to 70 vol% and press-molding with a press molding machine to obtain cylindrical pellets having a diameter of 6 mm and a length of 7 mm, the pellets were used as a lubricating oil (DTE Extra Heavy Oil manufactured by Mobil). Soak in the oil tank containing 5 to 20 vol% of the lubricating oil
Was impregnated.
各成分の配合量は、下表のとおりである。 The blending amount of each component is as shown in the table below.
このようにして得られた本発明品の固体潤滑剤のペレ
ットを摺動面に穿たれた穴に埋め込み、耐荷重性につい
て試験を行った。 The pellets of the solid lubricant of the present invention thus obtained were embedded in the holes formed in the sliding surface and tested for load resistance.
試験条件は次のとおりである。 The test conditions are as follows.
試験機 スラスト型摩擦試験機 試験片材質 高力黄銅第４種 摩擦面に対する固体潤滑剤の占める割合 30％ 相手材 クロムモリブデン鋼第４種 すべり速度 1m/min 荷重 初期荷重300kg/cm2 24時間毎に300kg/cm2の累積負荷 以上の条件により試験を行い、摩擦面温度の異常な上
昇または摩擦係数の異常な増加を生じた時点で試験機を
停止し、その時の荷重で評価した。Tester Thrust type friction tester Test piece material High-strength brass type 4 Solid lubricant occupies 30% of friction surface Counterpart material Chromium molybdenum steel type 4 Sliding speed 1m / min Initial load 300kg / cm 2 Every 24 hours The test was conducted under the condition of a cumulative load of 300 kg / cm 2 or more, and the test machine was stopped when an abnormal rise in the friction surface temperature or an abnormal increase in the friction coefficient occurred, and the load at that time was evaluated.
実施例−２〜４は、潤滑油の配合量を10vol％一定と
して、PTFEおよび鉛の配合量を種々変化させたものであ
る。また比較例−２および３は、同様に潤滑油の配合量
は10vol％一定として、PTFEおよび鉛の配合量を本発明
の範囲外とした。この結果を第１図に示す。In Examples 2 to 4, the compounding amounts of PTFE and lead were variously changed while the compounding amount of lubricating oil was kept constant at 10 vol%. Similarly, in Comparative Examples 2 and 3, the compounding amount of the lubricating oil was kept constant at 10 vol% and the compounding amounts of PTFE and lead were out of the range of the present invention. The results are shown in FIG.
第１図からも明らかなように、PTFEの配合量が70vol
％以上で鉛の配合量が20vol％以下の場合、およびPTFE
の配合量が20vol％以下で鉛の配合量が70vol％以上の場
合には、耐荷重性が不足している。As is clear from Fig. 1, the content of PTFE is 70 vol.
% And the lead content is 20 vol% or less, and PTFE
When the content of lead is 20 vol% or less and the content of lead is 70 vol% or more, the load resistance is insufficient.
実施例−５〜７は、PTFEと鉛の配合比率を1:1の割合
で一定とし、潤滑油の配合量を種々変化させたものであ
る。また比較例−４および５は同様にPTFEと鉛の配合比
率を1:1の割合で一定として、潤滑油の配合量を本発明
の範囲外とした。この結果を第２図に示す。In Examples 5 to 7, the compounding ratio of PTFE and lead was kept constant at a ratio of 1: 1 and the compounding amount of lubricating oil was variously changed. Similarly, in Comparative Examples 4 and 5, the compounding ratio of PTFE and lead was kept constant at a ratio of 1: 1 and the compounding amount of the lubricating oil was outside the range of the present invention. The results are shown in FIG.
第２図からも明らかなように、潤滑油の配合量が5vol
％以下または20vol％を越えると、耐荷重性が低下して
いる。As is clear from Fig. 2, the blending amount of lubricating oil is 5 vol.
% Or less or more than 20 vol%, the load resistance decreases.
以上実施例においては、PTFEと鉛を混合し、さらに成
形したあとに潤滑油を含浸させたが、PTFEと鉛の混合と
同時に潤滑油も配合し、そのあとにペレット状に成形し
てもよい。In the above examples, PTFE and lead were mixed and further impregnated with lubricating oil after molding, but lubricating oil may also be blended at the same time as mixing PTFE and lead, and then molded into pellets. .
一方、PTFEと鉛の混合成形体を250℃〜350℃で焼成し
たのち潤滑油を含浸してもよく、該焼成工程を加えるこ
とによりペレットの強度が向上し、耐荷重性がさらに向
上される。On the other hand, the mixed molded body of PTFE and lead may be impregnated with lubricating oil after firing at 250 ° C. to 350 ° C., and by adding the firing step, the strength of pellets is improved, and the load resistance is further improved. .
＜発明の効果＞ 以上説明したように、本発明の体積比で四フッ化エチ
レン樹脂20〜70％、鉛20〜70％、潤滑油５〜20％からな
る固体潤滑剤は、高温雰囲気においても、さらに高荷重
条件下でグリースなどの潤滑油と併用しても、潤滑性能
が低下しない、耐熱性・耐油性のあるものである。<Effects of the Invention> As described above, the solid lubricant composed of the tetrafluoroethylene resin 20 to 70%, the lead 20 to 70%, and the lubricating oil 5 to 20% in the volume ratio of the present invention can be used even in a high temperature atmosphere. Moreover, even if it is used together with a lubricating oil such as grease under a high load condition, the lubricating performance is not deteriorated and it has heat resistance and oil resistance.
第１図および第２図は、本発明の固体潤滑剤の各成分を
種々変化させ、その耐荷重性のついて試験した結果を示
すグラフである。FIG. 1 and FIG. 2 are graphs showing the results of testing the load bearing properties of various components of the solid lubricant of the present invention.
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｎ 10:08 30:00 40:02 50:08 Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display area C10N 10:08 30:00 40:02 50:08
Claims (1)
に埋め込んで使用する固体潤滑剤であって、体積比で、
四フッ化エチレン樹脂20〜70％、鉛20〜70％、潤滑油５
〜20％からなる固体潤滑剤。1. A solid lubricant used by being embedded in a hole or groove formed in a sliding surface of a bearing or the like, in a volume ratio,
Tetrafluoroethylene resin 20-70%, lead 20-70%, lubricating oil 5
Solid lubricant consisting of ~ 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62238278A JP2551437B2 (en) | 1987-09-22 | 1987-09-22 | Solid lubricant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62238278A JP2551437B2 (en) | 1987-09-22 | 1987-09-22 | Solid lubricant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6481897A JPS6481897A (en) | 1989-03-28 |
| JP2551437B2 true JP2551437B2 (en) | 1996-11-06 |
Family
ID=17027810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62238278A Expired - Fee Related JP2551437B2 (en) | 1987-09-22 | 1987-09-22 | Solid lubricant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2551437B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0735513B2 (en) * | 1990-02-27 | 1995-04-19 | 大同メタル工業株式会社 | Sliding member and manufacturing method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56116799A (en) * | 1980-02-20 | 1981-09-12 | Oiles Ind Co Ltd | Solid lubricating agent and its manufacture |
| JPS59179663A (en) * | 1983-03-31 | 1984-10-12 | Bando Chem Ind Ltd | Oil-containing synthetic resin composition |
-
1987
- 1987-09-22 JP JP62238278A patent/JP2551437B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6481897A (en) | 1989-03-28 |
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