JP2009079766A - Multilayer bearing manufacturing method - Google Patents
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本発明は複層軸受の製造方法に関し、特に環境保全のために鉛類を配合しないでも摺動特性と耐摩耗性に優れた複層軸受の製造方法に関する。 The present invention relates to a method for manufacturing a multi-layer bearing, and more particularly, to a method for manufacturing a multi-layer bearing excellent in sliding characteristics and wear resistance without blending lead for environmental protection.
鋼板などの金属板に裏打ちされた多孔質層に、ポリテトラフルオロエチレン樹脂（以下、ＰＴＦＥと記す）と、鉛または酸化鉛等の鉛類を含む含浸被覆組成物を含浸被覆させてなる複層軸受は、高面圧下での摺動特性に優れた軸受として知られている（例えば、特許文献１、特許文献２、特許文献３）。
一方、環境保全のため、鉛または鉛化合物の使用は望ましくないことから、ポリフッ化ビニリデンと酸化クロムおよび酸化鉄の一方からなる非毒性金属酸化物を用いた軸受用材料（特許文献４）、ＰＴＦＥとフェノール樹脂粉末を用いた複層摺動部材（特許文献５）、ＰＴＦＥを主成分とする樹脂に炭素繊維およびモース硬度 4 以下のウィスカを配合してなる複層軸受（特許文献６）等が知られている。
On the other hand, since it is not desirable to use lead or a lead compound for environmental conservation, a bearing material using a non-toxic metal oxide composed of polyvinylidene fluoride and one of chromium oxide and iron oxide (Patent Document 4), PTFE And a multi-layer sliding member using a phenol resin powder (Patent Document 5), a multi-layer bearing (Patent Document 6) in which carbon fiber and a whisker having a Mohs hardness of 4 or less are blended into a resin mainly composed of PTFE. Are known.
しかしながら、摺動面に存在することで、摩擦係数を下げ、摩耗量を減少させ、さらに耐焼付け性を向上させることのできる鉛または鉛化合物を含んだ含浸被覆組成物に代わる優れた材料は見つかっていないという問題がある。
特に車のシュレッダーダスト等に含まれる鉛を西暦 2000 年に 1/2、 2005 年に 1/3に減少させるとの通産省産業構造審議会の答申もあり、全く鉛を含まない鉛レス複層軸受が望まれている。
However, an excellent material to replace impregnated coating compositions containing lead or lead compounds that can reduce the coefficient of friction, reduce the amount of wear, and improve seizure resistance by being present on the sliding surface has been found. There is no problem.
There is also a report from the Ministry of International Trade and Industry's Industrial Structure Council stating that lead contained in car shredder dust, etc. will be reduced to 1/2 in 2000 and 1/3 in 2005. Is desired.
ＰＴＦＥを主成分とする樹脂に炭素繊維およびモース硬度 4 以下のウィスカを配合してなる複層軸受とすることにより、耐摩耗性、耐クリープ性が樹脂類の中でも劣るＰＴＦＥを用いても、比較的高い面圧下での摺動特性が得られる。しかし、この複層軸受は、面圧がより高くなると摺動特性が急激に低下するという問題がある。また、摺動特性の中で経時的な摩擦係数のばらつきが大きいという問題がある。 Compared to PTFE, which has poor wear resistance and creep resistance among resins, by using a multi-layer bearing in which carbon fiber and whisker with a Mohs hardness of 4 or less are blended into a resin containing PTFE as a main component. Sliding characteristics under high surface pressure can be obtained. However, this multi-layer bearing has a problem that the sliding characteristics are rapidly lowered when the surface pressure is higher. In addition, there is a problem that variation in friction coefficient with time is large in sliding characteristics.
本発明は、このような問題に対処するためになされたもので、鉛または鉛化合物を含まない含浸被覆組成物を用い、高面圧下において、動摩擦係数や摩耗量などの摺動特性に優れ、また安定した摺動特性を有する複層軸受の製造方法を提供することを目的とする。 The present invention has been made to address such problems, and uses an impregnated coating composition that does not contain lead or a lead compound, and has excellent sliding characteristics such as a dynamic friction coefficient and a wear amount under high surface pressure. It is another object of the present invention to provide a method for manufacturing a multilayer bearing having stable sliding characteristics.
本発明の複層軸受の製造方法は、金属裏金の表面に形成された多孔質層と、この多孔質層に含浸被覆された含浸被覆組成物とからなる複層軸受の製造方法において、上記含浸被覆組成物は、鉛類を含まず、ポリイミド樹脂（以下、ＰＩと記す）およびポリフェニレンサルファイド樹脂（以下、ＰＰＳと記す）から選ばれる少なくとも一つの合成樹脂５〜３０体積％と、硫酸カルシウム粉末、ホウ酸アルミニウム粉末、チタン酸カリウム粉末から選ばれる少なくとも一つの平均粒子径８〜４０μｍの粒状無機充填材３〜３０体積％と、炭素繊維１〜１５体積％と、残部であるＰＴＦＥとからなり、該製造方法は、上記金属裏金の表面に銅あるいは銅合金の粉末を散布し、これを加熱・加圧することで上記金属裏金の表面に焼結金属からなる上記多孔質層を形成する工程と、上記多孔質層上に上記含浸被覆組成物を塗布し、加熱・加圧により該含浸被覆組成物を上記多孔質層に含浸被覆する工程とを有することを特徴とする。 The method for producing a multi-layer bearing according to the present invention is a method for producing a multi-layer bearing comprising a porous layer formed on the surface of a metal backing and an impregnation coating composition impregnated and coated on the porous layer. The coating composition does not contain lead, and contains 5 to 30% by volume of at least one synthetic resin selected from polyimide resin (hereinafter referred to as PI) and polyphenylene sulfide resin (hereinafter referred to as PPS), calcium sulfate powder, It consists of 3 to 30% by volume of a granular inorganic filler having an average particle diameter of 8 to 40 μm selected from aluminum borate powder and potassium titanate powder, 1 to 15% by volume of carbon fiber, and the remaining PTFE. The manufacturing method includes the step of spraying copper or a copper alloy powder on the surface of the metal back metal, and heating and pressing the powder to form a sintered metal on the surface of the metal back metal. A step of forming a porous layer, and a step of applying the impregnation coating composition onto the porous layer and impregnating and coating the porous layer with the impregnation coating composition by heating and pressing. And
上記含浸被覆組成物を多孔質層に含浸被覆する工程において、該含浸被覆組成物は、溶媒に溶解あるいは分散させたディスパージョン液として塗布することを特徴とする。
また、上記多孔質層を形成する工程の前に、該多孔質層を形成する上記金属裏金の表面に、銅あるいは銅合金のメッキをすることを特徴とする。
In the step of impregnating and coating the porous layer with the impregnation coating composition, the impregnation coating composition is applied as a dispersion liquid dissolved or dispersed in a solvent.
In addition, before the step of forming the porous layer, the surface of the metal back metal forming the porous layer is plated with copper or a copper alloy.
上記製造方法により得られる複層軸受は、ＰＴＦＥにＰＩまたはＰＰＳと平均粒子径 1〜50μm の粒状無機充填材と炭素繊維とを配合することにより、鉛または鉛化合物を含まない含浸被覆組成物により構成される。また、この配合とすることにより、優れた摺動特性を有する反面、耐摩耗特性、耐クリープ特性が樹脂類の中でも劣るＰＴＦＥを主成分としても、より高面圧下で優れた摺動特性が得られる。 The multi-layer bearing obtained by the above manufacturing method is obtained by blending PTFE with PI or PPS, a granular inorganic filler having an average particle diameter of 1 to 50 μm, and carbon fiber, thereby providing an impregnated coating composition containing no lead or lead compound. Composed. In addition, this compound has excellent sliding characteristics, but on the other hand, it has excellent sliding characteristics under higher surface pressure, even if it has PTFE, which has poor wear resistance and creep resistance, among the resins. It is done.
本発明の複層軸受の製造方法は、含浸被覆する含浸被覆組成物がＰＴＦＥにＰＩおよび／またはＰＰＳを含み平均粒子径 1〜50μm の粒状無機充填材および炭素繊維を少なくとも配合してなるので、鉛または鉛化合物を全く含まない。その結果、環境保全に優れる。 Since the impregnation coating composition to be impregnated is formed by blending at least a particulate inorganic filler having an average particle size of 1 to 50 μm and carbon fiber in PTFE, the impregnation coating composition to be impregnated and coated is provided. Contains no lead or lead compounds. As a result, it is excellent in environmental conservation.
また、含浸被覆組成物がＰＩおよび／またはＰＰＳを 5〜 30 体積％、粒状無機充填材を 3〜 30 体積％、炭素繊維を 1〜 15 体積％、残部をＰＴＦＥとするので、得られる複層軸受は高面圧下でも摺動特性に優れ、さらに耐クリープ特性が向上する。 Moreover, since the impregnating coating composition contains 5 to 30% by volume of PI and / or PPS, 3 to 30% by volume of the granular inorganic filler, 1 to 15% by volume of the carbon fiber, and the balance being PTFE, the resulting multilayer is obtained. The bearing has excellent sliding characteristics even under high surface pressure, and further improves creep resistance.
本発明の複層軸受の製造方法は、金属裏金の表面に銅あるいは銅合金の粉末を散布し、これを加熱・加圧することで金属裏金の表面に焼結金属からなる多孔質層を形成する工程と、多孔質層上に含浸被覆組成物を塗布し、加熱・加圧により含浸被覆組成物を多孔質層に含浸被覆する工程とを有するので、（１）金属裏金、（２）多孔質層、（３）摺動面となる含浸被覆面からなる三層構造体で、高面圧下での摺動特性に優れた複層軸受を製造できる。 In the method for manufacturing a multilayer bearing according to the present invention, a porous layer made of sintered metal is formed on the surface of the metal back metal by spraying copper or copper alloy powder on the surface of the metal back metal and heating and pressurizing the powder. And (1) a metal backing, (2) porous, since the method includes the steps of: applying the impregnating coating composition onto the porous layer, and impregnating and coating the porous coating with the impregnating coating composition by heating and pressing. (3) A three-layer structure comprising an impregnated coated surface serving as a sliding surface, and a multilayer bearing excellent in sliding characteristics under high surface pressure can be produced.
本発明の製造方法により得られる複層軸受の一例を図１に示す。図１は複層軸受の断面図である。
複層軸受１は、鋼板などの金属裏金２の表面に焼結金属などの多孔質層３を形成し、この多孔質層３中に含浸被覆組成物４が含浸被覆された三層構造体となっている。含浸被覆面が摺動面となり、高面圧下での摺動特性に優れた軸受が得られる。
An example of the multilayer bearing obtained by the manufacturing method of the present invention is shown in FIG. FIG. 1 is a cross-sectional view of a multilayer bearing.
The
含浸被覆組成物４を構成するＰＴＦＥは、−（ＣＦ2−ＣＦ2）n−で表される公知の樹脂を用いることができる。また、ＰＴＦＥにパーフルオロアルキルエーテル基（−ＣpＦ2p−Ｏ−）（pは 1〜4 の整数）あるいはポリフルオロアルキル基（Ｈ（ＣＦ2）q−）（qは 1〜 20 の整数）などを導入した変性ＰＴＦＥもＰＴＦＥと共に使用できる。
これらのＰＴＦＥおよび変性ＰＴＦＥは、一般的なモールディングパウダーを得る懸濁重合法、ファインパウダーを得る乳化重合法のいずれを採用してもよいが、数平均分子量（Ｍｎ）は約 50 万から 1000 万が好ましく、さらに限定すれば 50 万から 300万が好ましい。
ＰＴＦＥの市販品としては、三井・デュポンフロロケミカル社製：テフロン（登録商標）７Ｊを、変性ＰＴＦＥの市販品としては、三井・デュポンフロロケミカル社製：テフロンＴＧ７０Ｊ、ダイキン工業社製：ポリフロンＭ１１１、ポリフロンＭ１１２、ヘキスト社製：ホスタフロンＴＦＭ１６００、ホスタフロンＴＦＭ１７００等を例示できる。
PTFE constituting the impregnating coating composition 4, - (CF 2 -CF 2) n - known resins represented by can be used. In addition, perfluoroalkyl ether group (—C p F 2p —O—) (p is an integer of 1 to 4) or polyfluoroalkyl group (H (CF 2 ) q —) (q is an integer of 1 to 20) ) Etc. can also be used together with PTFE.
These PTFE and modified PTFE may employ either a suspension polymerization method for obtaining a general molding powder or an emulsion polymerization method for obtaining a fine powder, but the number average molecular weight (Mn) is about 500,000 to 10 million. More preferably, 500,000 to 3,000,000 are preferable.
As a commercial product of PTFE, Mitsui / Dupont Fluorochemical Co., Ltd .: Teflon (registered trademark) 7J, and as a modified PTFE commercial product, manufactured by Mitsui / Dupont Fluorochemical Co., Ltd .: Teflon TG70J, Daikin Industries, Ltd .: Polyflon M111, Examples include Polyflon M112, Hoechst's: Hostaflon TFM1600, Hostaflon TFM1700, and the like.
本発明に使用できるＰＩおよびＰＰＳは、いわゆるスーパーエンジニアリングプラスチックスの一種であり、近年高温雰囲気で使用される比率が高くなっている合成樹脂である。ＰＴＦＥにＰＩもしくはＰＰＳを配合することによって、ＰＴＦＥの欠点であった耐摩耗性、耐クリープ特性が改善できる。 PI and PPS which can be used in the present invention are a kind of so-called super engineering plastics, and are synthetic resins which have been used in a high temperature atmosphere in recent years. By blending PIFE or PPS with PTFE, it is possible to improve the wear resistance and creep resistance, which were disadvantages of PTFE.
本発明に使用できる平均粒子径 1〜50μm の粒状無機充填材は、非金属系の無機充填材であってアスペクト比が 3 以下の球状、板状、不定形状の粒状で、ＰＴＦＥと分散配合できる無機充填材が使用できる。具体的には、硫酸カルシウム粉末、水酸化アルミニウム粉末、酸化亜鉛粉末、硫酸バリウム粉末等が例示できる。これらの中で、耐摩耗性の効果が高いための理由で硫酸カルシウム粉末が好ましい。 The granular inorganic filler having an average particle diameter of 1 to 50 μm that can be used in the present invention is a non-metallic inorganic filler having a spherical, plate-like or irregular shape with an aspect ratio of 3 or less, and can be dispersed and blended with PTFE. Inorganic fillers can be used. Specific examples include calcium sulfate powder, aluminum hydroxide powder, zinc oxide powder, barium sulfate powder and the like. Of these, calcium sulfate powder is preferred because of its high wear resistance effect.
本発明に使用できる炭素繊維は、粒状無機充填材と併用することで含浸被覆組成物を補強できるものであれば、ピッチ系あるいはＰＡＮ系のいずれでも用いることができる。炭素繊維の繊維長は 0.05mm 〜1mm の短繊維であることが好ましく、さらに好ましくは 0.05mm 〜0.1mm である。繊維径はφ 20 μm 以下、好ましくは、φ 7μm 〜φ15μm であり、アスペクト比は 5〜80、好ましくは 20 〜 50 である。この特性を有する炭素繊維であると、含浸被覆組成物への補強効果に優れ、耐摩耗特性、耐クリープ特性に優れる。
また、糸種は特に限定しないが、2000℃焼成、あるいはそれ以上の温度での処理品（黒鉛化品）より 1000 ℃焼成品（炭化品）の方が好ましい。なお、焼成温度については低弾性を狙った低温焼成品あるいは高弾性を狙った高温焼成品も使用できる。
The carbon fiber that can be used in the present invention can be either pitch-based or PAN-based as long as it can reinforce the impregnated coating composition by using in combination with the particulate inorganic filler. The fiber length of the carbon fiber is preferably a short fiber of 0.05 mm to 1 mm, more preferably 0.05 mm to 0.1 mm. The fiber diameter is φ20 μm or less, preferably φ7 μm to φ15 μm, and the aspect ratio is 5 to 80, preferably 20 to 50. A carbon fiber having this characteristic is excellent in the reinforcing effect on the impregnated coating composition, and is excellent in wear resistance and creep resistance.
The yarn type is not particularly limited, but a 1000 ° C. fired product (carbonized product) is more preferable than a 2000 ° C. fired product or a treated product (graphitized product) at a temperature higher than that. Regarding the firing temperature, a low-temperature fired product aiming at low elasticity or a high-temperature fired product aiming at high elasticity can be used.
炭素繊維の市販品は、ピッチ系として、呉羽化学社製：クレカミルドＭ１０１Ｓ、Ｍ１０１Ｆ、Ｍ１０１Ｔ、Ｍ１０７Ｓ、Ｍ１００７Ｓ、Ｍ２０１Ｓ、Ｍ２０７Ｓ、大阪ガスケミカル社製：ドナカーボンＳ２４１、Ｓ２４４、ＳＧ２４１、ＳＧ２４４を、ＰＡＮ系として、東邦レーヨン社製：ベスファイトＨＴＡ−ＣＭＦ０１６０−０Ｈ、ＣＭＦ００７０−０Ｈが挙げられる。 Commercially available products of carbon fibers are pitch type, Kureha Chemical Co., Ltd .: Crecamill M101S, M101F, M101T, M107S, M1007S, M201S, M207S, Osaka Gas Chemical Co., Ltd .: Donna Carbon S241, S244, SG241, SG244, PAN Examples include Tobe Rayon Co., Ltd .: Besfight HTA-CMF0160-0H and CMF0070-0H.
含浸被覆組成物における配合割合は、ＰＩまたはＰＰＳが 5〜 30 体積％であり、粒状無機充填材が 3〜 30 体積％であり、炭素繊維が 1〜 15 体積％であり、残部がＰＴＦＥである。
粒状無機充填材が 30 体積％をこえると相手材がアルミニウム合金等の軟質材の場合に相手部材を摩耗損傷するおそれがあり、 3 体積％未満であると耐摩耗性効果が発現しない。
炭素繊維の配合量が 30 体積％をこえると成形性に問題が生じ、 3体積％未満であると補強効果に乏しく、十分な耐クリープ性、耐摩耗性が得られない。
ＰＩまたはＰＰＳが 30 体積％をこえると高荷重下で摩擦係数が上昇し、初期トルクの増大および摩擦による発熱量の増大等の不具合が生じ、 5体積％未満であると補強効果が発揮できない。
ＰＴＦＥの配合量は、全配合量の残部とする。
The blending ratio in the impregnated coating composition is 5 to 30% by volume of PI or PPS, 3 to 30% by volume of the granular inorganic filler, 1 to 15% by volume of the carbon fiber, and the balance is PTFE. .
If the amount of the granular inorganic filler exceeds 30% by volume, the mating member may be damaged when the mating material is a soft material such as an aluminum alloy. If it is less than 3% by volume, the wear resistance effect will not be exhibited.
If the blending amount of carbon fiber exceeds 30% by volume, there will be a problem in moldability, and if it is less than 3% by volume, the reinforcing effect will be poor, and sufficient creep resistance and wear resistance will not be obtained.
If PI or PPS exceeds 30% by volume, the coefficient of friction increases under high load, causing problems such as increased initial torque and increased heat generation due to friction, and if it is less than 5% by volume, the reinforcing effect cannot be exhibited.
The blending amount of PTFE is the remainder of the total blending amount.
上述の原材料を溶媒に溶解あるいは分散させてディスパージョン液などが得られる。このディスパージョン液等を多孔質層に含浸させて溶媒を除去することにより、本発明の含浸被覆組成物が得られる。 A dispersion liquid or the like can be obtained by dissolving or dispersing the above-described raw materials in a solvent. The impregnation coating composition of the present invention is obtained by impregnating the dispersion liquid or the like into the porous layer to remove the solvent.
本発明に使用できる金属裏金２としては、鋼（ＳＰＣＣ等の構造用圧延鋼等）あるいは鋼以外の金属、例えばステンレス鋼または青銅などの銅系合金等が使用できる。また、裏金表面には、焼結金属層との密着性強化のため、焼結金属層と同等のメッキ（銅あるいは青銅等の銅合金）をするのが好ましい。
本発明に使用できる多孔質層３としては焼結金属層が好ましく、焼結金属層としては、銅あるいは青銅等の銅合金が摩擦摩耗特性に優れ好ましい。
As the metal back
The
本発明の製造方法により得られる複層軸受は、鉛または鉛化合物を配合しなくても、高面圧下での摺動特性に優れるため、樹脂製軸受では割れや欠けが生じやすい分野、あるいは自動車部品、家電部品分野で使用することができる。 The multi-layer bearing obtained by the production method of the present invention is excellent in sliding characteristics under high surface pressure without blending lead or a lead compound. It can be used in the parts and household appliance parts fields.
実施例および比較例に用いる原材料を一括して以下に示す。なお、［ ］は、表１に示す略号を示す。
（１）ＰＴＦＥ［ＰＴＦＥ］三井・デュポンフロロケミカル社製：テフロン７Ｊ
（２）ＰＰＳ［ＰＰＳ］東ソー社製：Ｂ１６０（融点 288℃）
（３）ＰＩ［ＰＩ］宇部興産社製：ＵＩＰ−Ｒ（融点 400℃）
（４）ピッチ系炭素繊維［ＣＦ−１］呉羽化学製：クレカミルドＭ１０１Ｓ（繊維長 100μm 、繊維径 14.5 μm ）
（５）ＰＡＮ系炭素繊維［ＣＦ−２］東邦レーヨン社製：ベスファイトＨＴＡ−ＣＭＦ０１６０−０Ｈ（繊維長 160μm 、繊維径 7μm ）
（６）硫酸カルシウム粉末［ＣａＳＯ−Ｐ］ノリタケ社製：Ｄ−１０１Ａ（モース硬度 2〜3 、平均粒子径 24 μm ）
（７）ホウ酸アルミニウム粉末［ＡｌＢＯ−Ｐ］四国化成工業社製：アルボライトＰＣ０８（モース硬度 7 、不定形状、平均粒子径 8 μm ）
（８）チタン酸カリウム粉末［ＫＴｉＯ−Ｐ］クボタ社製：ＴＸＡＸ−ＳＡ（モース硬度 4 、板状、平均粒子径 30〜40μm ）
（９）硫酸カルシウムウイスカ［ＣａＳＯ−Ｗ］大日精化工業社製（モース硬度 2〜3 、平均繊維長 50 〜 60 μm ）
（１０）チタン酸カリウムウイスカ［ＫＴｉＯ−Ｗ］大塚化学社製：ティスモＮ（モース硬度 4、平均繊維長 10 〜 20 μm ）
The raw materials used in the examples and comparative examples are collectively shown below. In addition, [] shows the symbol shown in Table 1.
(1) PTFE [PTFE] Mitsui / DuPont Fluoro Chemical Co., Ltd .: Teflon 7J
(2) PPS [PPS] manufactured by Tosoh Corporation: B160 (melting point: 288 ° C.)
(3) PI [PI] Ube Industries, Ltd .: UIP-R (melting point 400 ° C.)
(4) Pitch-based carbon fiber [CF-1] manufactured by Kureha Chemicals: Crecamill M101S (fiber length 100 μm, fiber diameter 14.5 μm)
(5) PAN-based carbon fiber [CF-2] manufactured by Toho Rayon Co., Ltd .: Besfite HTA-CMF0160-0H (fiber length 160 μm,
(6) Calcium sulfate powder [CaSO-P] manufactured by Noritake Co., Ltd .: D-101A (Mohs hardness 2-3, average particle size 24 μm)
(7) Aluminum borate powder [AlBO-P] manufactured by Shikoku Kasei Kogyo Co., Ltd .: Albolite PC08 (
(8) Potassium titanate powder [KTiO-P] manufactured by Kubota Corporation: TXAX-SA (
(9) Calcium sulfate whisker [CaSO-W] manufactured by Dainichi Seika Kogyo Co., Ltd. (Mohs hardness 2-3, average fiber length 50-60 μm)
(10) Potassium titanate whisker [KTiO-W] manufactured by Otsuka Chemical Co., Ltd .: Tismo N (
実施例１〜実施例４
実施例１〜実施例４の複層軸受を次の方法で作製した。
ステンレス鋼（ＳＵＳ３０４）の鋼板を脱脂した後、銅メッキを行ない、この鋼板の表面に青銅粉末（＃100 メッシュをパスし、＃200 メッシュでオンするもの）を散布した。
青銅粉末が一様に散布された鋼板を加熱・加圧することにより均一な層厚の多孔質層を形成した。
この多孔質層上に、表１に示す配合割合（単位は体積％）に調整したＰＴＦＥ粒子のディスパージョンを塗布し、乾燥炉中で溶媒を蒸発させ、加熱・加圧により樹脂成分を多孔質層に含浸被覆した。
Examples 1 to 4
The multilayer bearings of Examples 1 to 4 were produced by the following method.
After degreasing the stainless steel (SUS304) steel plate, copper plating was performed, and bronze powder (those that passed # 100 mesh and turned on with # 200 mesh) was sprayed on the surface of this steel plate.
A porous layer having a uniform layer thickness was formed by heating and pressing a steel plate on which bronze powder was uniformly dispersed.
On this porous layer, a dispersion of PTFE particles adjusted to the blending ratio (unit: volume%) shown in Table 1 is applied, the solvent is evaporated in a drying furnace, and the resin component is made porous by heating and pressing. The layer was impregnated.
このようにして得られた複層軸受の板材を所定の試験片形状に加工し、リングオンディスク型試験機により動摩擦係数、摩耗量を測定した。リングオンディスク型試験機の概要を図２に示す。リングオンディスク型試験機は、押圧力が印加され固定された相手材５に対して試験片６を所定の条件で回転させ動摩擦係数、摩耗量を測定する試験装置である。なお、７はロードセルである。
試験条件は速度 153m/min 、面圧 1.5 MPa で 30 時間供試し、試験終了直前の動摩擦係数、摩耗量を測定した。測定結果を表１に示す。
The plate material of the multi-layer bearing thus obtained was processed into a predetermined test piece shape, and the dynamic friction coefficient and the wear amount were measured with a ring-on-disk type testing machine. An outline of the ring-on-disk tester is shown in FIG. The ring-on-disk type tester is a test device that measures a dynamic friction coefficient and a wear amount by rotating a test piece 6 with a predetermined condition on a
The test conditions were a test for 30 hours at a speed of 153 m / min and a surface pressure of 1.5 MPa, and the dynamic friction coefficient and wear amount immediately before the end of the test were measured. The measurement results are shown in Table 1.
比較例１〜比較例４
表１に示す配合割合に調整したＰＴＦＥ粒子のディスパージョンを塗布する以外は、実施例１と同一の条件方法で複層軸受を作製した。得られた複層軸受の板材を実施例１と同一のリングオンディスク型試験機を用いて評価した。結果を表１に示す。
Comparative Examples 1 to 4
A multilayer bearing was produced by the same condition method as in Example 1 except that a dispersion of PTFE particles adjusted to the blending ratio shown in Table 1 was applied. The obtained plate material of the multilayer bearing was evaluated using the same ring-on-disk type testing machine as in Example 1. The results are shown in Table 1.
表１の結果から明らかなとおり、各実施例の複層軸受は、高ＰＶ値において低摩擦性を維持しつつも耐摩耗性を有していた。
一方、各比較例の複層軸受は、摩擦特性は良好であったが耐摩耗性が劣っていた。
As is clear from the results in Table 1, the multilayer bearings of the respective examples had wear resistance while maintaining low friction at high PV values.
On the other hand, the multilayer bearings of the respective comparative examples had good friction characteristics but poor wear resistance.
１ 複層軸受
２ 金属裏金
３ 多孔質層
４ 含浸被覆組成物
５ 相手材
６ 試験片
７ ロードセル
DESCRIPTION OF
Claims (3)
前記含浸被覆組成物は、鉛類を含まず、ポリイミド樹脂およびポリフェニレンサルファイド樹脂から選ばれる少なくとも一つの合成樹脂５〜３０体積％と、硫酸カルシウム粉末、ホウ酸アルミニウム粉末、チタン酸カリウム粉末から選ばれる少なくとも一つの平均粒子径８〜４０μｍの粒状無機充填材３〜３０体積％と、炭素繊維１〜１５体積％と、残部であるポリテトラフルオロエチレン樹脂とからなり、
該製造方法は、前記金属裏金の表面に銅あるいは銅合金の粉末を散布し、これを加熱・加圧することで前記金属裏金の表面に焼結金属からなる前記多孔質層を形成する工程と、
前記多孔質層上に前記含浸被覆組成物を塗布し、加熱・加圧により前記含浸被覆組成物を前記多孔質層に含浸被覆する工程とを有することを特徴とする複層軸受の製造方法。 In a method for producing a multilayer bearing comprising a porous layer formed on the surface of a metal back metal and an impregnated coating composition impregnated and coated on the porous layer,
The impregnated coating composition does not contain lead and is selected from 5 to 30% by volume of at least one synthetic resin selected from polyimide resin and polyphenylene sulfide resin, calcium sulfate powder, aluminum borate powder, and potassium titanate powder. It consists of at least one granular inorganic filler having an average particle diameter of 8 to 40 μm, 3 to 30% by volume, 1 to 15% by volume of carbon fibers, and the remaining polytetrafluoroethylene resin.
The manufacturing method includes forming a porous layer made of sintered metal on the surface of the metal back metal by spraying copper or a copper alloy powder on the surface of the metal back metal, and heating and pressing the powder.
A method of manufacturing a multilayer bearing, comprising: applying the impregnation coating composition onto the porous layer, and impregnating and coating the porous layer with the impregnation coating composition by heating and pressing.
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| CN108602127A (en) * | 2016-04-27 | 2018-09-28 | 三菱综合材料株式会社 | The manufacturing method of the porous composite component of copper porous body, copper, the manufacturing method of copper porous body and the porous composite component of copper |
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