JPS62207385A - Friction material for disc brake - Google Patents
Friction material for disc brakeInfo
- Publication number
- JPS62207385A JPS62207385A JP5099986A JP5099986A JPS62207385A JP S62207385 A JPS62207385 A JP S62207385A JP 5099986 A JP5099986 A JP 5099986A JP 5099986 A JP5099986 A JP 5099986A JP S62207385 A JPS62207385 A JP S62207385A
- Authority
- JP
- Japan
- Prior art keywords
- steel fibers
- friction material
- friction
- soft
- covered
- 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
- 239000002783 friction material Substances 0.000 title claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000007779 soft material Substances 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 5
- 239000000314 lubricant Substances 0.000 claims abstract description 4
- 239000012779 reinforcing material Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 abstract description 8
- 229920005989 resin Polymers 0.000 abstract description 8
- 229920001971 elastomer Polymers 0.000 abstract description 6
- 239000005011 phenolic resin Substances 0.000 abstract description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract description 3
- 229920001568 phenolic resin Polymers 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 229910001864 baryta Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- SPJOZZSIXXJYBT-UHFFFAOYSA-N Fenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=CC=C1 SPJOZZSIXXJYBT-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は自動車等の車輌等のディスクブレーキ用摩擦材
に関するもので、特にスチールファイバーを含む摩擦材
を使用した場合、制動時に発生するブレーキノイズ、い
わゆる「ブレーキの鳴き」を防止した摩擦材に係わるも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a friction material for disc brakes of vehicles such as automobiles, and in particular, when a friction material containing steel fiber is used, brake noise generated during braking is reduced. This relates to a friction material that prevents so-called "brake squeal."
［背景技術と問題点コ
本発明者らは、スチールファイバーを含むセミメタリッ
ク摩擦材では、従来ディスクブレーキ用に使用されてき
たアスベスト系摩擦材とは異なった鳴き現象があること
を発見した。その現象とは、制動前のロータ温度が１０
０℃以下の場合のみ車輌が停止する寸前に、瞬間的に鳴
きが発生することである。この鳴きは、従来のアスベス
ト系摩擦材では発生せず、スチールファイバーを５〜５
０容量％含む摩擦材のみに発生することが分った。[Background Art and Problems] The present inventors have discovered that a semi-metallic friction material containing steel fibers has a squealing phenomenon that is different from that of asbestos-based friction materials conventionally used for disc brakes. The phenomenon is that the rotor temperature before braking is 10
Only when the temperature is below 0°C, a momentary squeal occurs just before the vehicle comes to a stop. This noise does not occur with conventional asbestos-based friction materials, but with steel fibers
It was found that this occurred only in friction materials containing 0% by volume.
そしてこのような鳴きの原因を追求した結果、これらの
摩擦材に使用される、スチールファイバーが相手材との
摩擦の際、スティック、スリップ現象を起こし、鳴きを
発生することを確認した。As a result of investigating the cause of this noise, we confirmed that the steel fibers used in these friction materials cause stick and slip phenomena when they rub against the other material, causing the noise.
セミメタリック摩擦材は、通常スチールファイバーを主
体とする繊維状の補強剤と、粉末状の充填剤、潤滑剤、
摩擦調整剤等をフェノール樹脂等のバインダーで結合し
た素地とからなり、素地と補強剤は同じくバインダーレ
ジンによって結合されている。Semi-metallic friction materials usually consist of a fibrous reinforcing agent mainly made of steel fibers, a powdered filler, a lubricant,
It consists of a base material in which a friction modifier and the like are bound together with a binder such as a phenol resin, and the base material and reinforcing agent are also bound together by a binder resin.
この現象を更に詳しく説明すると次のとおりである。ス
チールファイバーは樹脂を主体とする素地とくらべて、
耐摩耗性が高いために、表面研磨、使用時の摩耗などに
より、素地からスチールファイバーがわずかに突出した
状態となる。このような状態で、ブレーキをかけると、
相手材との間にスティック、スリップを生じる。この現
象は毛足の短かいブラシの振動に類似していて、摩擦材
の場合、共振周波数が比較的低く、数百Ｈｚ以下である
。This phenomenon will be explained in more detail as follows. Compared to the base material mainly made of resin, steel fiber has
Due to its high abrasion resistance, steel fibers may protrude slightly from the base material due to surface polishing or wear during use. If you apply the brakes in this condition,
Stick or slip occurs between the material and the opposing material. This phenomenon is similar to the vibration of a brush with short bristles, and in the case of friction materials, the resonance frequency is relatively low, less than several hundred Hz.
このような鳴き現象に対する対策は摩擦材表面を平滑に
仕上げる、表面に樹脂等を塗り平滑にするなどの方法が
行われている。なお樹脂等を塗るものについては特願昭
５５−３Ｇ３５０号（特開昭５ト１３４Ｇ４５号公報）
に開示されている。Countermeasures against such squealing phenomena include methods such as smoothing the surface of the friction material or coating the surface with resin or the like to make it smooth. For those coated with resin etc., please refer to Japanese Patent Application No. 55-3G350 (Japanese Unexamined Patent Publication No. 134-134G45).
has been disclosed.
ところが、上述のように表面の平滑化をはかったもので
は、一時的な効果しかなく、摩擦材の摩耗の進行と共に
、表面の平滑性、被覆した物質等が失われ、鳴き防止効
果も消滅するという問題がある。However, as mentioned above, the effect of smoothing the surface is only temporary; as the friction material wears down, the surface smoothness and the coating material are lost, and the anti-squeal effect disappears. There is a problem.
［発明の目的、構成コ
本発明は上述のように、スチールファイバーを含む摩擦
材において、その表面の平滑化をはかっても、使用によ
り経時的に再び鳴きが発生するのを防止する目的でなさ
れたものである。[Purpose of the Invention and Structure] As mentioned above, the present invention has been made for the purpose of preventing squealing from occurring again over time in a friction material containing steel fibers even if the surface thereof is smoothed. It is something that
本発明は、前記従来の手法から脱し・、摩擦材における
スチールファイバーと素地との結合状態に４目してなさ
れたものである。従来の摩擦材では、スチールファイバ
ーは、フェノール樹脂等によって比較的強固に素地に結
合されている。このため、振動減衰性も低く、相手材を
含む車体側の振動と共振しやすい。The present invention departs from the conventional method and focuses on the bonding state of steel fibers and base materials in friction materials. In conventional friction materials, steel fibers are relatively firmly bonded to a base material using phenolic resin or the like. Therefore, the vibration damping property is also low, and it is likely to resonate with vibrations on the vehicle body side including the mating material.
本発明の摩擦材は、スチールファイバーをゴム、軟質樹
脂等の軟質材料で被覆した状態で、素地中に固定するも
のである。The friction material of the present invention is a material in which steel fibers are covered with a soft material such as rubber or soft resin and fixed in a base material.
この場合の軟質材料とは、摩擦材自体に用いる結合剤樹
脂、例えば一般に用いられているフェノール樹脂よりも
軟質であることが必要である。The soft material in this case needs to be softer than the binder resin used in the friction material itself, such as a commonly used phenol resin.
また、被覆の状態は、スチールファイバーカ必ずしも完
全に軟質材料で覆われている必要はなく、部分的に覆わ
れている場合でも効果がある。In addition, the steel fibers do not necessarily have to be completely covered with the soft material, but it is effective even if the steel fibers are partially covered.
一方、素地全体を軟質の結合材で結合することは、耐摩
耗性、耐熱性に悪影響があるため、実用的でない。On the other hand, bonding the entire substrate with a soft bonding material is not practical because it has a negative effect on wear resistance and heat resistance.
本発明の摩擦材によれば、素地よりスチールファイバー
が突出した状態で、ブレーキをかけても、素地とスチー
ルファイバーとの間の軟質材料が振動を吸収し、また共
振周波数も低下するため、鳴きを生じにくくなる。According to the friction material of the present invention, even if the brake is applied with the steel fibers protruding from the base, the soft material between the base and the steel fibers absorbs vibrations and also reduces the resonant frequency, resulting in noise. becomes less likely to occur.
そして、この鳴き防止効果は、一時的なものでなく、摩
擦材が摩耗して行っても失われることはない。This anti-squeal effect is not temporary and will not be lost even if the friction material wears out.
以下に実施例及び比較例を挙げてその試験結果を説明す
る。The test results will be explained below with reference to Examples and Comparative Examples.
（実施例１）
スチールファイバーをＮＢＲゴムラテックス（日本セｔ
ン９２１．商品名： ニー７ ホー ル１５６２３）
ニ浸１１１ シ、スチールファイバー表面を弾性のあ
るＮＢＲゴムで被覆した。乾燥後の付ｅｆｆｌはスチー
ルファイバーのｔｆｉｔに対し、ＮＢＲゴム２％であっ
た。(Example 1) Steel fibers were coated with NBR rubber latex (Japan Set
N921. Product name: Knee 7 Hole 15623)
Dipping 111 The surface of the steel fiber was coated with elastic NBR rubber. The effl after drying was 2% of the NBR rubber relative to the tfit of the steel fiber.
このゴム被覆したスチールファイバーヲ３５容量％、潤
滑剤としてクラファイト３５容量％、バインダーとして
フェノール樹脂２０容量％、充填剤としてバライタ５容
量％、同じく酸化マグネシウム５容量％を配合し、熱成
形してディスクブレーキのパッドを作成した。35% by volume of this rubber-coated steel fiber, 35% by volume of graphite as a lubricant, 20% by volume of phenolic resin as a binder, 5% by volume of baryta as a filler, and 5% by volume of magnesium oxide, and thermoformed. I made a disc brake pad.
（比較例）
スチールファイバーに被覆を施さず、他は実施例１とほ
ぼ同じ配合及び製造条件でディスクブレーキパッドを作
成した。(Comparative Example) A disc brake pad was produced using substantially the same formulation and manufacturing conditions as in Example 1, except that the steel fibers were not coated.
（実施例２）
実施例１と同様の被覆処理を施したゴム被覆スチールフ
ァイバー１５容量％、グラファイトＩ５容量％、補強材
としてカーボンファイバー！５容ｆ１１％、同じくアラ
シドファイバー１５容量％、充填剤としてバライタ１０
容全％、同じく酸化マグネシウム１０容量％、バインダ
ーとしてフェノール樹脂２０容量％を配合し、熱成形し
てディスクブレーキ用パッドを作成した。(Example 2) 15% by volume of rubber-coated steel fibers subjected to the same coating treatment as in Example 1, 5% by volume of graphite I, and carbon fiber as a reinforcing material! 5 volume f11%, same aracid fiber 15 volume%, baryta 10 as filler
Similarly, 10% by volume of magnesium oxide and 20% by volume of phenol resin as a binder were blended and thermoformed to create a disc brake pad.
実施例１．２と比較例のパッドを普通乗用車のブレーキ
に装むし、初速度２０に■／ｌｌ、減速度０．１Ｇ、ブ
レーキ開始温度５０℃にて１００のブレーキ試験を行っ
たところ、比較例の鳴き発生率は７０％であったのに対
し、実施例１，２のパッドでは共に０％であった。The pads of Example 1.2 and Comparative Example were installed in the brakes of an ordinary passenger car, and 100 brake tests were conducted at an initial speed of 20 mm/ll, a deceleration of 0.1 G, and a brake start temperature of 50°C. The squeal occurrence rate in the example was 70%, whereas it was 0% in both the pads of Examples 1 and 2.
また、５００に■走行後に同様の試験を行ったところ、
比較例の鳴き発生率が８０％であったのに対し、実施例
１．２は共に０％であった。In addition, when a similar test was conducted on the 500 after driving,
While the squeal occurrence rate in Comparative Example was 80%, it was 0% in both Examples 1 and 2.
［効果コ
以上説明したように、本発明では、スチールファイバー
が、素材より軟質な材料で覆われた状態で素地中に固定
され、スチールファイバーを含む摩擦材に固有の鳴きを
、耐摩耗性、耐熱性をそこなうことな（防止し、かつ鳴
き防止効果を持続することができる。[Effects] As explained above, in the present invention, steel fibers are fixed in a substrate while being covered with a material softer than the material, and the squeaking inherent to friction materials containing steel fibers can be suppressed by wear resistance, It is possible to prevent (prevent) damage to heat resistance and maintain the anti-squeal effect.
Claims (2)
が充填材、補強材、バインダー、潤滑剤等からなる摩擦
材であって、スチールファイバーを軟質材料で被覆した
状態で素地の中に固定したことを特徴とするディスクブ
レーキ用摩擦材。(1) A friction material containing 5 to 50% by volume of steel fibers, with the remainder consisting of fillers, reinforcing materials, binders, lubricants, etc., in which the steel fibers are covered with a soft material and fixed in a base material. A friction material for disc brakes characterized by:
特許請求の範囲第１項記載のディスクブレーキ用摩擦材
。(2) The friction material for a disc brake according to claim 1, wherein the soft material is a rubber-like elastic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61050999A JPH0694554B2 (en) | 1986-03-07 | 1986-03-07 | Friction material for disk brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61050999A JPH0694554B2 (en) | 1986-03-07 | 1986-03-07 | Friction material for disk brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62207385A true JPS62207385A (en) | 1987-09-11 |
| JPH0694554B2 JPH0694554B2 (en) | 1994-11-24 |
Family
ID=12874485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61050999A Expired - Lifetime JPH0694554B2 (en) | 1986-03-07 | 1986-03-07 | Friction material for disk brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0694554B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443601A (en) * | 2019-08-29 | 2021-03-05 | 罗伯特·博世有限公司 | Brake pad with surface coating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56147879A (en) * | 1980-04-17 | 1981-11-17 | Akebono Brake Ind Co Ltd | Friction material |
| JPS58213078A (en) * | 1982-06-04 | 1983-12-10 | Hitachi Chem Co Ltd | Friction material composition |
-
1986
- 1986-03-07 JP JP61050999A patent/JPH0694554B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56147879A (en) * | 1980-04-17 | 1981-11-17 | Akebono Brake Ind Co Ltd | Friction material |
| JPS58213078A (en) * | 1982-06-04 | 1983-12-10 | Hitachi Chem Co Ltd | Friction material composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443601A (en) * | 2019-08-29 | 2021-03-05 | 罗伯特·博世有限公司 | Brake pad with surface coating |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0694554B2 (en) | 1994-11-24 |
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