JPH04142388A - Wet friction material - Google Patents
Wet friction materialInfo
- Publication number
- JPH04142388A JPH04142388A JP26587590A JP26587590A JPH04142388A JP H04142388 A JPH04142388 A JP H04142388A JP 26587590 A JP26587590 A JP 26587590A JP 26587590 A JP26587590 A JP 26587590A JP H04142388 A JPH04142388 A JP H04142388A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- resin
- fibers
- friction
- heat
- 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.)
- Pending
Links
- 239000002783 friction material Substances 0.000 title claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000011256 inorganic filler Substances 0.000 claims abstract description 10
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000000835 fiber Substances 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 229920003043 Cellulose fiber Polymers 0.000 abstract description 4
- 229920006231 aramid fiber Polymers 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 4
- 239000005909 Kieselgur Substances 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000005011 phenolic resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004760 aramid Substances 0.000 abstract description 2
- 239000004927 clay Substances 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 229920001568 phenolic resin Polymers 0.000 abstract description 2
- 229920006287 phenoxy resin Polymers 0.000 abstract description 2
- 239000013034 phenoxy resin Substances 0.000 abstract description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 abstract description 2
- 229920000647 polyepoxide Polymers 0.000 abstract description 2
- 239000012784 inorganic fiber Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 229910001111 Fine metal Inorganic materials 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 150000002505 iron Chemical class 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、車両用の湿式摩擦材に関する。本発明は、た
とえば、自動車の自動変速機内で潤滑油中に浸した状態
で使用される湿式摩擦材に利用できる。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wet friction material for vehicles. The present invention can be used, for example, in a wet friction material used in a state of being soaked in lubricating oil in an automatic transmission of an automobile.
［従来の技術］
近年、摩擦材の使われ方の多様化に伴い、摩擦材に対す
る要求特性も多様化し高性能を求める動きが活発化して
きている。湿式摩擦材は潤滑油と接触しこれにより摩擦
熱の放熱がなされ冷却効果が比較的大きい。ざらに、冷
却効果を増し耐久性を向上させるために摩擦材に溝を形
成したり、ポーラスにして潤滑油との接触面積を大きく
している。ところで、放熱効果を高めて摩擦材を耐熱性
にするには、摩擦材の構成要素である基材が伝熱性をも
つことが望ましい。しかし通常基材は有機繊維で形成さ
れ伝熱性は低い。[Prior Art] In recent years, as the ways in which friction materials are used have diversified, the characteristics required for friction materials have also diversified, and there has been an active movement toward higher performance. Wet friction materials come into contact with lubricating oil, thereby dissipating frictional heat and having a relatively large cooling effect. Generally speaking, in order to increase the cooling effect and improve durability, friction materials are formed with grooves or made porous to increase the contact area with lubricating oil. By the way, in order to enhance the heat dissipation effect and make the friction material heat resistant, it is desirable that the base material, which is a component of the friction material, has heat conductivity. However, the base material is usually made of organic fibers and has low heat conductivity.
この点の改良としては、たとえば、特開昭６２１８４０
８５号公報には、金属ａｍと無機ポリマーバインダーと
からなり連通性の空孔をもち耐熱性、耐摩耗性に優れた
湿式摩擦材の開示がある。As an improvement in this point, for example, Japanese Patent Application Laid-Open No. 621840
Publication No. 85 discloses a wet friction material that is made of a metal am and an inorganic polymer binder, has communicating pores, and has excellent heat resistance and abrasion resistance.
基材の繊維を有機質の物から金属質のものに代えると、
耐熱性は向上するが金属繊維により相手材の攻撃性が大
きくなり摩擦材として問題がある。When the base fiber is changed from an organic material to a metallic one,
Although the heat resistance is improved, the metal fibers increase the aggressiveness of the mating material, which poses a problem as a friction material.
また摩擦係数の向上のために摩擦材の表面に金属粉を１
〜９０体積％含む樹脂組成物を塗布した摩擦材の開示が
ある。しかしこの場合は初期の摩擦係数の向上はするが
摩擦材内部に蓄積された熱の伝熱が充分でなく耐熱性の
向上とはならない。In addition, one layer of metal powder is added to the surface of the friction material to improve the coefficient of friction.
There is a disclosure of a friction material coated with a resin composition containing ~90% by volume. However, in this case, although the initial coefficient of friction is improved, the heat accumulated inside the friction material is not sufficiently transferred and the heat resistance is not improved.
［発明が解決しようとする課題］
本発明は上記の事情に鑑みてなされたもので、ｌ！ｉ擦
材中に金属の微粉末を均一に分散させ摩擦熱の蓄積を抑
制し放熱性を高め耐熱性の向上した湿式摩擦材とするこ
とを目的とする。[Problems to be Solved by the Invention] The present invention has been made in view of the above circumstances. The object of the present invention is to uniformly disperse fine metal powder in a friction material to suppress the accumulation of frictional heat, improve heat dissipation, and provide a wet friction material with improved heat resistance.
［課題を解決するための手段］
本発明の湿式摩擦材は、基材と、無機充填剤と、該基材
および該無機充填剤を結合する結合剤とで形成される湿
式摩擦材において、平均粒径１〜５０μｍの鉄系微粉末
を５〜５０重量％含むことを特徴とする。[Means for Solving the Problems] The wet friction material of the present invention includes a base material, an inorganic filler, and a binder that binds the base material and the inorganic filler. It is characterized by containing 5 to 50% by weight of iron-based fine powder with a particle size of 1 to 50 μm.
本発明の湿式摩擦材は、セルロース繊維、アラミド繊維
などの繊維基材に、無機充填剤および金属微粉末が、熱
硬化性樹脂の結合剤で結合されて形成されているもので
ある。The wet friction material of the present invention is formed by bonding an inorganic filler and fine metal powder to a fiber base material such as cellulose fiber or aramid fiber using a thermosetting resin binder.
本発明において金属微粉末は、鉄系微粉末で平均粒径が
１〜５０μｍの粉末が摩擦材中に５〜５０１量％配合さ
れている。この鉄系微粉末が摩擦材中に均一に分散され
ると、伝熱性が高まり放熱性が向上し、蓄熱による劣化
を防ぐので耐熱性が向上する。In the present invention, the metal fine powder is an iron-based fine powder having an average particle size of 1 to 50 μm and is blended in the friction material in an amount of 5 to 501%. When this iron-based fine powder is uniformly dispersed in the friction material, heat conductivity increases, heat dissipation is improved, and deterioration due to heat accumulation is prevented, so heat resistance is improved.
この鉄系金属の微粉末の平均粒径が５０μｍを超えると
摩擦材中での分散性か低下し相手材の攻撃性が大きくな
り好ましくない。また平均粒径か１μｍ未満であると分
散性はよくなるが金属による伝熱性の向上が見込めない
ので好ましくない。If the average particle size of the iron-based metal fine powder exceeds 50 μm, the dispersibility in the friction material decreases and the aggressiveness of the mating material increases, which is not preferable. If the average particle size is less than 1 μm, the dispersibility will be improved, but no improvement in heat conductivity due to the metal can be expected, which is not preferable.
また、この鉄系微粉末の配合量は５〜５０重量％である
。配合量が５０重量％を超えると重量増加によりバース
ト強度が劣り、相手攻撃性が高くなるので好ましくない
。配合量が５重量％未満では添加効果が充分発揮されな
いので好ましくない。Further, the blending amount of this iron-based fine powder is 5 to 50% by weight. If the blending amount exceeds 50% by weight, the burst strength will be poor due to the weight increase, and the attack power against the opponent will be increased, which is not preferable. If the amount is less than 5% by weight, the effect of addition will not be sufficiently exhibited, which is not preferable.
基材を構成する４！［は、有機繊維、無機ＨＮとするこ
とができ、たとえば、セルロース繊維、ポリアミド繊維
、アラミド繊維、ガラス繊維などの少なくとも一種で形
成することができる。4 that constitutes the base material! [ can be made of organic fibers or inorganic HN, and can be formed of at least one of cellulose fibers, polyamide fibers, aramid fibers, glass fibers, and the like.
無機充填剤としては、けいそう土、粘土などが利用でき
る。さらにこの摩擦材には摩擦係数を向上させたり安定
化させる摩擦調整剤のカシュウダスト、グラファイトな
どの粉末を用いることができる。As the inorganic filler, diatomaceous earth, clay, etc. can be used. Furthermore, powder of cashew dust, graphite, etc., which is a friction modifier that improves or stabilizes the coefficient of friction, can be used as the friction material.
結合剤としては、熱硬化性樹脂のフェノール樹脂、ブチ
ラール樹脂、フェノキシ樹脂、エポキシ樹脂などを用い
ることができる。As the binder, thermosetting resins such as phenol resin, butyral resin, phenoxy resin, and epoxy resin can be used.
本発明に係る湿式摩擦材は、たとえば、次のようにして
製造できる。基材繊維と無機充填剤と鉄系微粉末とを水
に分散させ、この分散液から抄紙して紙状とし、この紙
状物を所定の形状に打法き、これに結合剤を含浸させて
硬化させて形成される。The wet friction material according to the present invention can be manufactured, for example, as follows. The base fiber, inorganic filler, and iron-based fine powder are dispersed in water, paper is made from this dispersion, the paper is punched into a predetermined shape, and it is impregnated with a binder. It is formed by hardening.
この摩擦材は芯金と重ねて積層されて使用される。This friction material is used by being laminated with the core bar.
［発明の作用および効果］
本発明の湿式摩擦材は、伝熱性の鉄系金属の微粉末が特
定量配合されて分散しているので、従来のものに比べて
伝熱性が高まり放熱性がよく媒体による冷却が容易であ
る。そのため高速回転、高負荷条件においても耐熱性が
良く摩擦特性が安定する。[Operations and Effects of the Invention] The wet friction material of the present invention has a specific amount of heat-conductive iron-based metal fine powder mixed and dispersed therein, so it has higher heat conductivity and better heat dissipation than conventional materials. Easy to cool with medium. Therefore, it has good heat resistance and stable friction characteristics even under high speed rotation and high load conditions.
また微粉末であるので摩擦材中での分散性が良く、金属
繊維などと異なり相手材の攻撃性を低減することができ
る。このため、湿式！！！擦材の耐久性が向上し、安定
した摩擦特性を長期間保持することができる。Furthermore, since it is a fine powder, it has good dispersibility in friction materials, and unlike metal fibers, it can reduce the aggressiveness of mating materials. For this reason, wet method! ! ! The durability of the friction material is improved and stable friction characteristics can be maintained for a long period of time.
［実施例］ 以下、実施例により異体的に説明する。[Example] Hereinafter, a different explanation will be given with reference to Examples.
（実施例〉
セルロース繊維４０重量％、アラミド繊維１０重置％、
無機充填剤のケイソウ土を３０重量％、摩擦調整剤のカ
ーシュウダストを１０重量％、鉄微粉末の粒径が２〜６
μｍのもの１０重量％、の混合物を水に分散して常法に
より抄紙した。この抄紙体を乾燥して結合剤のフェノー
ル樹脂（３０重重置）を含浸させて１７０℃に加熱して
硬化させて湿式摩擦材とした。(Example) 40% by weight of cellulose fiber, 10% by weight of aramid fiber,
30% by weight of diatomaceous earth as an inorganic filler, 10% by weight of Kershu dust as a friction modifier, and the particle size of fine iron powder is 2 to 6.
A mixture of 10% by weight of micrometer particles was dispersed in water and paper was made by a conventional method. This paper body was dried, impregnated with a phenolic resin (30 layers) as a binder, and heated to 170° C. to harden it to obtain a wet friction material.
（比較例）
実施例の湿式摩擦材の作製時に、鉄の微粉末を配合せず
に抄紙したものである。(Comparative example) Paper was made without adding fine iron powder when producing the wet friction material of the example.
く評価）
摩擦材をプレ−トとの間に積層しく摩擦材５枚、プレー
ト５枚を交互に積層）、高速回転式 ＳＡＥ＃２をもち
いて回転数５６０Ｏｒｐｍ、面圧９゜（Ｊ５Ｆ／ｃｉ、
給油量１ 、２ｄ／ｆｔ）ｉｎ −ｃｔｒｔ （軸芯給
油）、給油温度８０’Ｃ１の条件下で摩擦係数と継合回
数との関係を調べた。これは実施例および比較例の摩擦
材についてそれぞれおこなった。5 friction materials are stacked between the plate and 5 plates are stacked alternately), high-speed rotation type SAE#2 is used, the rotation speed is 560 Orpm, and the surface pressure is 9 degrees (J5F/ci). ,
The relationship between the friction coefficient and the number of joints was investigated under the conditions of an oil supply amount of 1,2 d/ft) in -ctrt (shaft core oil supply) and an oil supply temperature of 80'C1. This was done for each of the friction materials of Examples and Comparative Examples.
結果は第１図に示すように、実施例の摩擦材では７００
０回のサイクルをおこなっても摩擦係数は安定している
。すなわち摩擦材に摩擦熱が加わっても放熱され耐熱性
か向上し、摩擦係数に異常は認められない。As shown in Figure 1, the results are 700% for the friction material of the example.
The friction coefficient remains stable even after 0 cycles. In other words, even if frictional heat is applied to the friction material, the heat is radiated and the heat resistance is improved, and no abnormality is observed in the friction coefficient.
一方比較例の金属微粉末を含まない摩擦材では、３００
０サイクルあたりから摩擦係数が低下し次第に熱劣化を
おこしている。On the other hand, in the comparative example of a friction material that does not contain fine metal powder, the
From around the 0th cycle, the friction coefficient decreases and thermal deterioration gradually occurs.
したがって、摩擦材中に鉄微粉末を配合することにより
、伝熱性がよくなり放熱がよくなり熱の蓄積による劣化
が抑制でき摩擦材の耐熱性が向上した。Therefore, by blending fine iron powder into the friction material, heat conductivity is improved, heat radiation is improved, deterioration due to heat accumulation is suppressed, and the heat resistance of the friction material is improved.
第１図は摩擦係数と継合サイクルとの関係を示すグラフ
である。
特許出願人 アイシン化工株式会社FIG. 1 is a graph showing the relationship between the friction coefficient and the joint cycle. Patent applicant Aisin Kako Co., Ltd.
Claims (1)
合する結合剤とで形成される湿式摩擦材において、 平均粒径１〜５０μｍの鉄系微粉末を５〜５０重量％含
むことを特徴とする湿式摩擦材。[Scope of Claims] A wet friction material formed of a base material, an inorganic filler, and a binder that binds the base material and the inorganic filler, comprising iron-based fine powder with an average particle size of 1 to 50 μm. A wet friction material characterized by containing 5 to 50% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26587590A JPH04142388A (en) | 1990-10-02 | 1990-10-02 | Wet friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26587590A JPH04142388A (en) | 1990-10-02 | 1990-10-02 | Wet friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04142388A true JPH04142388A (en) | 1992-05-15 |
Family
ID=17423312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26587590A Pending JPH04142388A (en) | 1990-10-02 | 1990-10-02 | Wet friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04142388A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004238567A (en) * | 2003-02-07 | 2004-08-26 | Mazda Motor Corp | Friction member and friction member unit |
| KR100786452B1 (en) * | 1999-02-15 | 2007-12-17 | 컨스트럭션 리서치 앤 테크놀로지 게엠베하 | Cement additive |
| US8367767B1 (en) | 2009-02-27 | 2013-02-05 | Schaeffler Technologies AG & Co., KG | Friction lining for wet clutch |
| JP2016050283A (en) * | 2014-09-02 | 2016-04-11 | 日産自動車株式会社 | Friction material |
| JP2018062580A (en) * | 2016-10-13 | 2018-04-19 | いすゞ自動車株式会社 | Friction material and method for producing the same |
-
1990
- 1990-10-02 JP JP26587590A patent/JPH04142388A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100786452B1 (en) * | 1999-02-15 | 2007-12-17 | 컨스트럭션 리서치 앤 테크놀로지 게엠베하 | Cement additive |
| JP2004238567A (en) * | 2003-02-07 | 2004-08-26 | Mazda Motor Corp | Friction member and friction member unit |
| US8367767B1 (en) | 2009-02-27 | 2013-02-05 | Schaeffler Technologies AG & Co., KG | Friction lining for wet clutch |
| JP2016050283A (en) * | 2014-09-02 | 2016-04-11 | 日産自動車株式会社 | Friction material |
| JP2018062580A (en) * | 2016-10-13 | 2018-04-19 | いすゞ自動車株式会社 | Friction material and method for producing the same |
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