JPH0660325B2 - Multi-layer bearing - Google Patents
Multi-layer bearingInfo
- Publication number
- JPH0660325B2 JPH0660325B2 JP61069648A JP6964886A JPH0660325B2 JP H0660325 B2 JPH0660325 B2 JP H0660325B2 JP 61069648 A JP61069648 A JP 61069648A JP 6964886 A JP6964886 A JP 6964886A JP H0660325 B2 JPH0660325 B2 JP H0660325B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- powder
- layer
- lead
- bearing
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/24—Brasses; Bushes; Linings with different areas of the sliding surface consisting of different materials
Description
【発明の詳細な説明】 ＜発明の目的＞ 産業上の利用分野 本発明は複層軸受に係り、詳しくは、自動車用ショック
アブソーバーブッシュに好適な複層軸受に係る。DETAILED DESCRIPTION OF THE INVENTION <Objects of the Invention> Industrial field of application The present invention relates to a multi-layer bearing, and more particularly to a multi-layer bearing suitable for a shock absorber bush for an automobile.
従来の技術 従来から、種々の複層軸受が提案実施されている。例え
ば、特開昭５４−８６０４１号公報には、金属裏金に裏
打ちされた多孔質層上に、四フッ化エチレン樹脂（以
下、ＰＴＦＥ樹脂と呼ぶ）、フッ化鉛ならびに鉛−錫合
金あるいは鉛の混合物を塗布し、これをロール圧延など
によって多孔質中に含浸させてなる軸受材料が記載され
ている。この軸受は潤滑性のほか高荷重化に優れ、良好
は材料である。しかし、この軸受では、多孔質上に塗布
される混合物はあくまで混合状態にあって、ＰＴＦＥ樹
脂粉末とフッ化鉛などの粉末との間の結合力が弱く、と
くに、限界荷重が低く、耐キャビテーション性も低い。
このため、ショックアブソーバーなどのように変動荷重
がかかる往復運動をする場合には必ずしも満足のゆくも
のではない。2. Description of the Related Art Conventionally, various multilayer bearings have been proposed and implemented. For example, in JP-A-54-86041, tetrafluoroethylene resin (hereinafter referred to as PTFE resin), lead fluoride and lead-tin alloy or lead are formed on a porous layer lined with a metal backing. A bearing material obtained by applying a mixture and impregnating the mixture into a porous material by rolling or the like is described. This bearing is excellent in terms of lubrication and high load, and is a good material. However, in this bearing, the mixture applied on the porous material is in a mixed state, and the binding force between the PTFE resin powder and the powder such as lead fluoride is weak, and especially the limit load is low and the cavitation resistance is low. The nature is also low.
Therefore, it is not always satisfactory in the case of reciprocating motion such as a shock absorber in which a fluctuating load is applied.
最近、ショックアブソーバーは、１）寒冷地対策による
オイルの低粘度化、２）コスト低減、軽量化に伴う摺動
運動の高荷重化などにより以前に比べて潤滑条件は厳し
いものになっている。このため摺動部分は片当りする部
分では、しばしば油膜がきれて境界潤滑状態となり、摩
擦抵抗が増え、円滑な摺動がたく摩耗量が増大する傾向
にある。Recently, shock absorbers have become more severe in lubrication conditions than before due to 1) lowering of oil viscosity as a countermeasure against cold regions, 2) cost reduction, and higher load of sliding motion due to weight reduction. For this reason, in the sliding portion, the oil film is often cut off in a one-side contacting state, resulting in a boundary lubrication state, friction resistance increases, smooth sliding tends to be difficult, and the amount of wear tends to increase.
このような状況の中で、上記のような従来の複層軸受で
は、軸受面の耐荷重性、耐摩耗性に問題があり、境界潤
滑状態では軸受面を形成する樹脂が摩減し焼付くことも
ある。この原因としては、多孔質焼結体に厚さ数十ミク
ロンの皮膜として存在する樹脂層の強度が弱いというこ
とがあげられる。この理由は、樹脂層を形成する混合物
はあくまで混合状態にあるため、ＰＴＦＥ同志の結合が
弱いほか、ＰＴＦＥ樹脂とフッ化鉛などの充填材との結
合が弱いからである。Under such circumstances, the conventional multi-layer bearing as described above has a problem in the load bearing capacity and wear resistance of the bearing surface, and in the boundary lubrication state, the resin forming the bearing surface wears out and seizes. Sometimes. The reason for this is that the strength of the resin layer existing as a film having a thickness of several tens of microns in the porous sintered body is weak. The reason for this is that since the mixture forming the resin layer is in a mixed state, the bond between the PTFE resins is weak and the bond between the PTFE resin and the filler such as lead fluoride is weak.
更に詳しく説明すると、多孔質層と樹脂層とから成る複
層軸受において、樹脂層を形成するのには、 （１）ＰＴＦＥ樹脂のディスパージョン（ＰＴＦＥ樹脂
の水性コロイド懸濁液とフッ化鉛などの充填材とをディ
スパージョン状態で混合し、このディスパージョン状態
を凝集させたペーストとして塗布含浸被覆する。More specifically, in a multi-layer bearing composed of a porous layer and a resin layer, the resin layer is formed by (1) dispersion of PTFE resin (aqueous colloidal suspension of PTFE resin and lead fluoride, etc.). And the filler are mixed in a dispersion state, and the dispersion state is applied and impregnated and coated as a paste that is agglomerated.
（２）ＰＴＦＥ樹脂粉末と充填材粉末とから成る混合粉
末を多孔質層上に含浸、被覆する。(2) The porous layer is impregnated and coated with a mixed powder of PTFE resin powder and filler powder.
（１）の場合では、ペースト中のＰＴＦＥ樹脂の粒径は
０．２〜０．４μの如くきわめて小さく、とくに、ＰＴ
ＦＥ粒子は水あるいは有機溶剤中に分散されたものであ
るため、塗布、含浸後に加熱焼成しても、ＰＴＦＥ樹脂
の粒子同志の結合強度が弱い。更に、ＰＴＦＥ樹脂の粒
子によって充填材粉末を保持固定する力も弱く、強い樹
脂層が得られない。In the case of (1), the particle size of the PTFE resin in the paste is extremely small, such as 0.2 to 0.4 μ.
Since the FE particles are dispersed in water or an organic solvent, the bond strength between the particles of the PTFE resin is weak even if the particles are heated and baked after coating and impregnating. Further, the force of holding and fixing the filler powder by the particles of the PTFE resin is weak, and a strong resin layer cannot be obtained.
（２）の場合では、ＰＴＦＥ樹脂の粉末粒子の平均粒子
径は５００μ程度ときわめて大きいが、混合されるフッ
化鉛などの粒子径は均一に分散させることからは５０μ
以下、特に５μ以下にする必要があり、きわめて小さ
い。このため、フッ化鉛などの均一に分散させると云っ
ても、ＰＴＦＥの粒子の周囲に細かいフッ化鉛などを付
着させる程度で、均一に分散させると云っても自から限
界がある。安定した皮膜強度が得られないという問題が
あった。In the case of (2), the average particle size of the PTFE resin powder particles is extremely large, about 500 μ, but the particle size of lead fluoride or the like to be mixed is 50 μ because it is uniformly dispersed.
In the following, it is necessary to make it 5 μm or less, which is extremely small. For this reason, even if it is said that lead fluoride or the like is uniformly dispersed, even if fine lead fluoride or the like is attached to the periphery of the particles of PTFE, there is a limit from itself. There is a problem that stable film strength cannot be obtained.
発明が解決しようとする問題点 本発明はこれらの問題点の解決を目的とし、具体的に
は、境界潤滑状態での焼付きを防止し、樹脂層の中で鉛
−錫合金が均一に分散され、ＰＴＦＥ樹脂の粉末が強固
に結合するとともに、この樹脂粉末によって鉛−錫の合
金粉末が強固に保持させて、限界荷重ならびに耐キャビ
テーション性を向上させた複層軸受を提供することを目
的とする。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention aims to solve these problems. Specifically, it prevents seizure in the boundary lubrication state and uniformly disperses the lead-tin alloy in the resin layer. The PTFE resin powder is firmly bonded to the lead-tin alloy powder by this resin powder, and the limit load and cavitation resistance are improved. To do.
＜発明の構成＞ 問題点を解決するための手段ならびにその作用 本発明に係る複層軸受は、鋼板上に被着形成された多孔
質金属焼結層と、その上に被覆焼成されると共に一部が
この多孔質金属焼結層中に入った樹脂層とから成る複層
軸受において、一つの粉末粒子の中に四フッ化エチレン
樹脂の粉末粒子７０〜９５体積％と鉛−錫合金の粉末粒
子５〜３０体積％のみが一体に共凝析され、しかも、四
フッ化エチレン樹脂ならびに鉛−錫合金の各粒子が均一
に分岐された粒子から成る樹脂粉末を、多孔質金属焼結
層上に被覆焼成してなるものから樹脂層を形成して成る
ことを特徴とする。<Structure of the Invention> Means for Solving Problems and Actions Thereof A multi-layer bearing according to the present invention has a porous metal sintered layer adhered and formed on a steel plate, and is coated and fired on the porous metal sintered layer. In a multi-layer bearing whose part comprises a resin layer contained in this porous metal sintered layer, 70 to 95% by volume of powder particles of tetrafluoroethylene resin and powder of lead-tin alloy are contained in one powder particle. On the porous metal sintered layer, a resin powder composed of particles in which only 5 to 30% by volume of particles are co-coagulated together and the particles of the tetrafluoroethylene resin and the lead-tin alloy particles are uniformly branched It is characterized in that a resin layer is formed from a material obtained by coating and baking.
以下、図面を用いて本発明に係る軸受の構成ならびにそ
の作用を説明すると、次の通りである。Hereinafter, the structure and operation of the bearing according to the present invention will be described with reference to the drawings.
なお、第１図は本発明において樹脂層の形成に供せられ
る樹脂粉末の一例の拡大図であり、第２図は本発明に係
る複層軸受の一例の拡大縦断面図である。1 is an enlarged view of an example of resin powder used for forming a resin layer in the present invention, and FIG. 2 is an enlarged vertical sectional view of an example of a multi-layer bearing according to the present invention.
まず、本発明で樹脂層の形成に使用される樹脂粉末は、
後で第１図によって説明する通り、ＰＴＦＥ樹脂と鉛−
錫合金とから成るが、単に、これらが粉末状態で混合さ
れたものではない。すなわち、樹脂粉末の一つの粉末に
は２つの成分の粉末が一体に共凝析されて含まれ、しか
も、一つの樹脂粉末中に２つの成分の粉末が均一に分散
されている。従って、ＰＴＦＥ樹脂を主成分とする粉末
中に鉛−錫合金の粉末が均一に分散されているので、鉛
−錫合金の添加効果をより一層増加させることができ、
また、ＰＴＦＥ樹脂や、鉛−錫合金などの効果を充分に
発揮でき、結合が一体化していることからも、機械的強
さおよび耐摩耗性も向上でき、キャビテーションに対す
る改善効果も達成できる。First, the resin powder used for forming the resin layer in the present invention is
As described later with reference to FIG. 1, PTFE resin and lead-
Although it is composed of a tin alloy, they are not simply mixed in a powder state. That is, one resin powder contains two component powders co-coagulated together, and two resin component powders are uniformly dispersed in one resin powder. Therefore, since the lead-tin alloy powder is uniformly dispersed in the powder containing the PTFE resin as a main component, the effect of adding the lead-tin alloy can be further increased.
Further, the effects of the PTFE resin, the lead-tin alloy and the like can be sufficiently exhibited, and since the bonding is integrated, the mechanical strength and wear resistance can be improved, and the effect of improving cavitation can also be achieved.
更に詳しく説明すると、まず、耐荷重性および耐摩耗性
に優れた軸受とするために、青銅粉末等の金属粉末より
得られた多孔質層の上に、例えば、ＰＴＦＥ樹脂ならび
に鉛−錫合金の各粉末の一次粒子が共凝析されて一体さ
れた状態で含む樹脂粉末を被覆焼成して、樹脂層を、表
面の軸受層として形成する。More specifically, first, in order to obtain a bearing having excellent load resistance and wear resistance, for example, a PTFE resin and a lead-tin alloy are formed on a porous layer obtained from a metal powder such as bronze powder. A resin layer is formed as a bearing layer on the surface by coating and firing a resin powder containing primary particles of each powder co-coagulated and integrated.
この樹脂粉末は、ＰＴＦＥ樹脂の粉末７０〜９５体積％
（以下、単に％という）と鉛−錫合金の粉末５〜３０％
とからなっている。また、これら成分の粉末がとくに共
凝析されて一体化し、これによって粉末を形成したもの
である。したがって、樹脂粉末では、ＰＴＦＥ樹脂粉末
と鉛−錫合金微粉末とが均一に分散し、これら粉末が共
凝析されて形成された粉末である。すなわち、樹脂粉末
１は第１図に示すようにその中にＰＴＦＥ樹脂の粉末２
と鉛−錫合金の粉末３が均一に分散され、共凝析により
一体化されている構造を成している。This resin powder is PTFE resin powder 70 to 95% by volume.
(Hereinafter referred to simply as "%") and lead-tin alloy powder 5 to 30%
It consists of In addition, powders of these components are particularly co-coagulated and integrated to form a powder. Therefore, in the resin powder, the PTFE resin powder and the lead-tin alloy fine powder are uniformly dispersed, and these powders are co-coagulated and formed. That is, as shown in FIG. 1, resin powder 1 contains PTFE resin powder 2 therein.
And the lead-tin alloy powder 3 are uniformly dispersed and are integrated by co-coagulation.
一般に、ＰＴＦＥ樹脂はその成形加工方法により大きく
３つに分けられる。圧縮成形用粉末のモールディングパ
ウダー、ペースト押出し用粉末のファインパウダー、塗
装・コーティング用のディスパージョンである。このう
ち複層軸受のように多孔質層への含浸、被覆に使用され
るのはファインパウダーとディスパージョンである。Generally, PTFE resins are roughly classified into three types according to the molding processing method. Molding powder for compression molding, fine powder for paste extrusion, and dispersion for painting and coating. Of these, fine powder and dispersion are used to impregnate and coat the porous layer as in the multi-layer bearing.
これらファインパウダとディスパージョンは何れもＰＴ
ＦＥ樹脂の中間生成物の乳化重合物から得られ、この乳
化重合物を凝析することによりファインパウダーがで
き、また、濃縮することによりディスパージョンができ
る。Both fine powder and dispersion are PT
Obtained from an emulsion polymer of an intermediate product of FE resin, fine powder can be obtained by coagulating the emulsion polymer, and dispersion can be obtained by concentrating.
これに対し、本発明において樹脂層を形成する樹脂粉末
は共凝析粉であって、乳化重合物の状態にあるＰＴＦＥ
樹脂の一次粒子の粉末（直径０．２〜０．４μ）と鉛−
錫合金の粉末を均一に混合し、これを更に共凝析させて
一体化した凝析したものである。つまり、樹脂粉末の１
つの粒子は、外見的にはＰＴＦＥ樹脂の一次粒子の粉末
に鉛−錫合金の粉末が均一に混合されて凝集し、二次粒
子として形成されたもので、粒径はＰＴＦＥ樹脂のファ
インパウダーの粒径と同程度で平均５００μ適度の粉末
である。On the other hand, in the present invention, the resin powder forming the resin layer is a co-coagulated powder and is a PTFE in the state of an emulsion polymer.
Powder of resin primary particles (diameter 0.2 to 0.4 μm) and lead-
The tin alloy powder is uniformly mixed, and this is further co-coagulated to form an integrated coagulation. In other words, 1 of resin powder
The two particles are apparently formed as secondary particles by uniformly mixing and agglomerating the powder of the lead-tin alloy with the powder of the primary particles of the PTFE resin, and the particle size is the fine powder of the PTFE resin. It is a powder having an average particle size of about 500 μ, which is similar to the particle size.
このため、従来のものと異なって、均一性に分散でき、
鉛−錫合金粉の充填材率が増加でき、成形法としてもペ
ースト押出しによって樹脂層を形成することが可能とな
った。このため、樹脂層の強度としては、ローラなどに
よりペースト押出しによる成形が可能なため、そのとき
に、樹脂粉末が繊維化して互いにからみやすく、かつ繊
維化構造の間に充填材を包み込みやすく、ＰＴＦＥ樹脂
粉末同志の結合およびＰＴＦＥ樹脂粉末と充填材との結
合が強化されることにより大きな物性の改良がみられ
た。Therefore, unlike the conventional one, it can be dispersed uniformly,
The filling rate of the lead-tin alloy powder can be increased, and the resin layer can be formed by paste extrusion as the molding method. Therefore, as the strength of the resin layer, since it is possible to form the resin layer by paste extrusion with a roller or the like, at that time, the resin powder is easily made into fibers and entangled with each other, and it is easy to wrap the filler between the fiberized structures. A large improvement in physical properties was observed by strengthening the bond between the resin powders and the bond between the PTFE resin powder and the filler.
また、鉛−錫合金の粉末は主として固体潤滑剤として機
能し、ＰＴＦＥ樹脂の低摩耗性を損うことなく耐荷重性
を向上させ、潤滑油に対しても化学的に安定である。In addition, the lead-tin alloy powder mainly functions as a solid lubricant, improves the load resistance without impairing the low abrasion resistance of the PTFE resin, and is chemically stable against lubricating oil.
実施例 次に、実施例について説明する。Example Next, an example will be described.
まず、第２図に示す如く帯状鋼板７（厚さ１．２０mm）
に多孔質層６（青銅厚さ０．３mm）を焼結した。この上
に、ＰＴＦＥ樹脂粉末８５％ならびに鉛−錫合金粉末１
５％が一体に共凝析された樹脂粉末（１６メッシュ以
下）を予め有機溶剤で湿潤させておき、この樹脂粉末を
多孔質層６上に散布してからロールで圧入して樹脂層を
成型した。First, as shown in FIG. 2, strip steel plate 7 (thickness 1.20 mm)
Then, the porous layer 6 (thickness of bronze: 0.3 mm) was sintered. On top of this, PTFE resin powder 85% and lead-tin alloy powder 1
Resin powder (16 mesh or less) in which 5% is co-coagulated integrally is previously moistened with an organic solvent, and this resin powder is sprayed on the porous layer 6 and then pressed with a roll to form the resin layer. did.
次に、この成型した樹脂層から有機溶剤を加熱して取り
去った後、３８０℃で１０分間焼成して、樹脂層におい
てＰＴＦＥ樹脂粉末同志を密着させ、その後、更に、ロ
ールで圧下し寸法調整を行ない、表面に樹脂層５を具え
る複層軸受４を得られた。これに対し、比較材料とし
て、第３表に示すように、ＰＴＦＥ樹脂粉末（ファイン
パウダー）８５％と鉛−錫合金粉末１５％とを混合しこ
の混合粉末から上記のところと同様に樹脂層を形成した
もの（比較試料Ｎｏ．７）、ＰＴＦＥ樹脂８５％、鉛−
錫合金粉末１５％になるものを、ＰＴＦＥ樹脂ディスパ
ージョンに鉛−錫合金粉末を混合してペースト状のもの
として得て、これで同様に樹脂層を形成したもの（比較
試料Ｎｏ．６）を用意した。Next, the organic solvent is heated and removed from the molded resin layer, followed by firing at 380 ° C. for 10 minutes to bring the PTFE resin powders into close contact with each other in the resin layer, and then further rolling down to adjust the dimensions. Then, the multi-layer bearing 4 having the resin layer 5 on the surface was obtained. On the other hand, as a comparative material, as shown in Table 3, PTFE resin powder (fine powder) 85% and lead-tin alloy powder 15% were mixed, and a resin layer was formed from this mixed powder in the same manner as described above. Formed (Comparative Sample No. 7), PTFE resin 85%, lead-
A product having a tin alloy powder content of 15% was obtained as a paste by mixing lead-tin alloy powder with a PTFE resin dispersion, and a resin layer was similarly formed with this (Comparative sample No. 6). I prepared.
このようにして得られた上記各種複合軸受を鈴木式摩擦
摩耗試験機を使用し、第１表の試験条件で耐荷重性、耐
摩耗性、摩擦性の評価を行なった。具体的には、境界潤
滑状態になりやすい低粘度のストラットオイル中で荷重
を一時間毎に２０Kgf／cm2ずつ累積し、限界となる荷重
を求め比較した。また、同時に樹脂層の皮膜強度を評価
する目的でキャビテーション試験を第２表の条件で実施
し比較を試みた。Using the Suzuki type friction and wear tester, the various composite bearings thus obtained were evaluated for load resistance, wear resistance and friction under the test conditions shown in Table 1. Specifically, the load was accumulated by 20 Kgf / cm 2 per hour in a low-viscosity strut oil that is likely to be in a boundary lubrication state, and a limit load was obtained and compared. At the same time, a cavitation test was conducted under the conditions shown in Table 2 for the purpose of evaluating the film strength of the resin layer, and comparison was attempted.
試験結果は第３表に示される如く、本発明による複合軸
受は比較材料Ｎｏ．６、Ｎｏ．７に比べて限界荷重が大
きく、また、耐キャビテーション性も比較試料に比べ優
れていることがわかった。 As the test results are shown in Table 3, the composite bearing according to the present invention has a comparative material No. 6, No. It was found that the limit load was larger than that of No. 7 and the cavitation resistance was also superior to that of the comparative sample.
また、更に本発明の効果を比較するために、特願昭５８
−０１４３１５号公報で示すＰＴＦＥ樹脂と四フッ化エ
チレン−パーフロロアルキルビニルエーテル共重合樹脂
（以下、ＰＦＡ樹脂と呼ぶ）の共凝析粉（比較試料Ｎ
ｏ．８）を前記と同一条件で含浸、被覆後焼成して複合
軸受を製造した。この複合軸受につき、鈴木式摩擦摩耗
試験およびキャビテーション試験を行なったところ、キ
ャビテーションでは同等であったが、耐荷重性では本発
明によるものに劣っていた。また、本発明による複層軸
受において鉛−錫合金粉末の配合量を変えて同様に試験
したところ、Ｐｂ−Ｓｎ合金粉末５−２０％において耐
荷重性およびキャビテーションは同等であった。なお、
第３表中にキャビテーションの判定基準は次の通りであ
る。Moreover, in order to further compare the effects of the present invention, Japanese Patent Application No.
Co-coagulated powder (comparative sample N) of PTFE resin and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (hereinafter referred to as PFA resin) disclosed in JP-A-014315
o. 8) was impregnated under the same conditions as described above, coated and fired to manufacture a composite bearing. When the Suzuki type friction and wear test and the cavitation test were conducted on this composite bearing, the cavitation was the same, but the load resistance was inferior to that of the present invention. Further, when the same test was performed in the multi-layer bearing according to the present invention by changing the compounding amount of the lead-tin alloy powder, the load resistance and the cavitation were the same in the Pb-Sn alloy powder 5-20%. In addition,
The criteria for cavitation in Table 3 are as follows.
Ａ……ほとんど変化なし Ｂ……樹脂層が一部取り去られている。A: Almost no change B: Part of the resin layer has been removed.
Ｃ……樹脂層が完全に取り去られ焼成体が露出する。C: The resin layer is completely removed and the fired body is exposed.
＜発明の効果＞ 以上説明したように、本発明は鋼板上に形成された多孔
質金属焼結層の上に、四フッ化エチレン樹脂ならびに鉛
−錫の各粉末粒子が共凝析により一体に結合して一つの
粉末粒子を形成した樹脂粉末が被覆焼成してなる樹脂層
を具えることを特徴とする。したがって、変動荷重のか
かる往復運動等でオイルの低粘度化、高荷重化に伴なっ
て境界潤滑状態となりうるような基しい条件下でも優れ
た耐摩耗性、摩擦特性を有しているので、ショックアブ
ソーバーブッシュあるいはピストンリングのような高荷
重がかかる箇所に適用した場合、特に、有効限界荷重が
大きく、また、耐キャビテーション性に優れている。<Effects of the Invention> As described above, according to the present invention, tetrafluoroethylene resin and lead-tin powder particles are integrally co-coagulated on the porous metal sintered layer formed on the steel sheet. It is characterized in that it comprises a resin layer formed by coating and firing resin powder which is bonded to form one powder particle. Therefore, since it has excellent wear resistance and friction characteristics even under basic conditions such that the viscosity of oil decreases due to reciprocating motion with variable load, and boundary lubrication can be achieved with increasing load, When applied to a place where a high load is applied such as a shock absorber bush or a piston ring, the effective limit load is particularly large and the cavitation resistance is excellent.
なお、この複層軸受は、一般工作機械等に使用されてい
る軸受に適用しても有効であるのは言うまでもない。Needless to say, this multi-layer bearing is also effective when applied to bearings used in general machine tools and the like.
第１図は共凝析された本発明の樹脂粉末の一例の拡大
図、第２図は本発明に係る複層軸受の一例の拡大縦断面
図である。 符号１……共凝析された樹脂粉末 ２……ＰＴＦＥ樹脂 ３……鉛−錫合金 ４……複層軸受材 ５……樹脂層 ６……焼結多孔質層 ７……鋼板裏金FIG. 1 is an enlarged view of an example of the co-coagulated resin powder of the present invention, and FIG. 2 is an enlarged vertical sectional view of an example of the multilayer bearing according to the present invention. Reference numeral 1 ... Co-coagulated resin powder 2 ... PTFE resin 3 ... Lead-tin alloy 4 ... Multi-layer bearing material 5 ... Resin layer 6 ... Sintered porous layer 7 ... Steel plate backing
Claims (1)
と、その上に被覆焼成されると共に一部がこの多孔質金
属焼結層中に入った樹脂層とから成る複層軸受におい
て、 一つの粉末粒子の中に四フッ化エチレン樹脂の粉末粒子
７０〜９５体積％と鉛−錫合金の粉末粒子５〜３０体積
％のみが一体に共凝析され、しかも、四フッ化エチレン
樹脂ならびに鉛−錫合金の各粒子が均一に分岐された粒
子から成る樹脂粉末を、前記多孔質金属焼結層上に被覆
焼成してなるものから前記樹脂層を形成して成ることを
特徴とする複層軸受。1. A multi-layer comprising a porous metal sintered layer adhered and formed on a steel plate, and a resin layer which is covered and fired on the steel sheet and a part of which is contained in the porous metal sintered layer. In the bearing, only 70 to 95% by volume of powder particles of tetrafluoroethylene resin and 5 to 30% by volume of powder particles of lead-tin alloy are co-coagulated together in one powder particle. The resin layer is formed by coating and baking resin powder composed of particles of ethylene resin and particles of lead-tin alloy uniformly branched on the porous metal sintered layer. And multi-layer bearing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61069648A JPH0660325B2 (en) | 1986-03-27 | 1986-03-27 | Multi-layer bearing |
| KR1019870002864A KR920008640B1 (en) | 1986-03-27 | 1987-03-27 | Double-layered bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61069648A JPH0660325B2 (en) | 1986-03-27 | 1986-03-27 | Multi-layer bearing |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2752894A Division JPH0811803B2 (en) | 1994-01-31 | 1994-01-31 | Method for manufacturing multi-layer bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62227003A JPS62227003A (en) | 1987-10-06 |
| JPH0660325B2 true JPH0660325B2 (en) | 1994-08-10 |
Family
ID=13408872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61069648A Expired - Lifetime JPH0660325B2 (en) | 1986-03-27 | 1986-03-27 | Multi-layer bearing |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0660325B2 (en) |
| KR (1) | KR920008640B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010104186A (en) * | 2000-05-13 | 2001-11-24 | 이경재 | A surface treatment method of ball joint for a car |
| JP4584101B2 (en) * | 2005-09-29 | 2010-11-17 | 大豊工業株式会社 | Resin-based sliding member and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125063A (en) * | 1974-08-26 | 1976-03-01 | Hitachi Ltd | |
| JPS5486041A (en) * | 1977-12-14 | 1979-07-09 | Daido Metal Co Ltd | Bearing material |
-
1986
- 1986-03-27 JP JP61069648A patent/JPH0660325B2/en not_active Expired - Lifetime
-
1987
- 1987-03-27 KR KR1019870002864A patent/KR920008640B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125063A (en) * | 1974-08-26 | 1976-03-01 | Hitachi Ltd | |
| JPS5486041A (en) * | 1977-12-14 | 1979-07-09 | Daido Metal Co Ltd | Bearing material |
Also Published As
| Publication number | Publication date |
|---|---|
| KR920008640B1 (en) | 1992-10-08 |
| JPS62227003A (en) | 1987-10-06 |
| KR870009149A (en) | 1987-10-23 |
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