JPH06129454A - Nonasbestine friction material - Google Patents
Nonasbestine friction materialInfo
- Publication number
- JPH06129454A JPH06129454A JP2910792A JP2910792A JPH06129454A JP H06129454 A JPH06129454 A JP H06129454A JP 2910792 A JP2910792 A JP 2910792A JP 2910792 A JP2910792 A JP 2910792A JP H06129454 A JPH06129454 A JP H06129454A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- asbestos
- fiber
- vibration cutting
- cutting method
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車のディスクパッ
ド，ブレーキライニング，クラッチフェーシング等とし
て使用される摩擦材であって、特に高負荷の下で使用さ
れる中，大型車用ディスクブレーキに好適な非石綿系摩
擦材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction material used as an automobile disc pad, a brake lining, a clutch facing, etc., and is particularly suitable for medium and large-sized disc brakes used under a high load. It relates to a non-asbestos friction material.
【０００２】[0002]
【従来の技術】自動車のブレーキには大きく分けて、デ
ィスクブレーキ、ドラムブレーキの２種類があり、一般
的に小型車にはディスクブレーキが、中，大型車にはド
ラムブレーキが用いられている。ディスクブレーキはド
ラムブレーキに比べて、その構造上、熱が逃げやすく、
また均一な制動が得られ易いという利点がある反面、耐
摩耗性に関してはドラムブレーキの方が優れていて、従
来の一般的なディスクブレーキを中，大型車に使用した
場合、ディスクパッドの摩耗がひどく、また表面に亀裂
が入り、長期の使用に耐えられない。従って摩擦性能は
ディスクブレーキの方が優れているのであるが、摩耗性
能の点で中，大型車にはドラムブレーキを使用しなけれ
ばならないのである。2. Description of the Related Art There are roughly two types of brakes for automobiles: disc brakes and drum brakes. Generally, disc brakes are used for small cars and drum brakes for medium and large cars. Compared to drum brakes, disc brakes have a structure that allows heat to escape more easily,
Also, while it has the advantage that uniform braking can be easily obtained, drum brakes are superior in terms of wear resistance, and when conventional general disc brakes are used in medium and large vehicles, disc pad wear is reduced. Severe and cracked on the surface, it cannot withstand long-term use. Therefore, although disc brakes are superior in friction performance, drum brakes must be used for medium and large vehicles in terms of wear performance.
【０００３】ところで高負荷に耐えられる代表的な摩擦
材としてはＣ／Ｃコンポジッド，焼結金属，セラミック
ス等が挙げられるが、特殊な用途に用いられることが多
く、自動車のブレーキ用摩擦材として使用した場合、Ｃ
／Ｃコンポジットは高速時の制動には優れているもの
の、低速時においては摩擦係数が低く摩耗が大きいとい
う欠点があり、焼結金属はブレーキ制動時に鳴きと呼ば
れる不快な音が発生しやすく、また焼結金属自体重く、
更に摩擦材が高温時には発火しやすいという問題点があ
り、セラミックスは対面攻撃性が大きく相手材であるロ
ータ等にひどい条痕を残すことになる。また、これらの
材料をブレーキ用摩擦材の一部として用いた複合材も考
えられるが、製造工程が複雑になりコストもかかるので
実用的ではない。Typical friction materials that can withstand high loads include C / C composites, sintered metals, ceramics, etc., but they are often used for special purposes and are used as friction materials for automobile brakes. If you do, C
Although / C composite is excellent for braking at high speeds, it has the disadvantage of low friction coefficient and large wear at low speeds, and sintered metal tends to produce an unpleasant noise called squeal during braking. The sintered metal itself is heavy,
Further, there is a problem that the friction material is easily ignited when the temperature is high, and the ceramic has a great face-to-face attacking property, and a terrible streak mark is left on the other material such as the rotor. A composite material using these materials as a part of the friction material for a brake is also conceivable, but it is not practical because the manufacturing process is complicated and the cost is high.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上述したよう
に、ディスクブレーキはドラムブレーキに比べて、その
構造上、熱が逃げやすく、また均一な制動が得られ易い
という利点があるので、中，大型車へのディスクブレー
キ装着を可能とする摩擦材の開発が望まれる。従って、
本発明が解決しようとする課題は、小型車のような低負
荷においては勿論のこと、中，大型車のような高負荷に
おいても優れた耐摩耗性を示すディスクブレーキ用の非
石綿系摩擦材を提供することである。However, as described above, the disc brake has a merit that heat can easily escape and uniform braking can be easily obtained in comparison with the drum brake because of its structure. It is desired to develop a friction material that makes it possible to install disc brakes on large vehicles. Therefore,
The problem to be solved by the present invention is to provide a non-asbestos-based friction material for a disc brake, which exhibits excellent wear resistance not only in a low load such as a small vehicle but also in a high load such as a medium-sized or large vehicle. Is to provide.
【０００５】[0005]
【課題を解決するための手段】本発明は上記の課題を解
決することを目的としてなされたもので、その構成は石
綿以外の繊維成分とフェノール樹脂等の熱硬化性樹脂成
分と黒鉛，硫酸バリウム等の充填材成分とを含有する摩
擦材において前記充填材成分の少なくとも一部にビビリ
振動切削法により製造されたスチール繊維を含むことを
特徴とするものである。SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and its constitution is a fiber component other than asbestos, a thermosetting resin component such as phenol resin, graphite and barium sulfate. In a friction material containing a filler component such as the above, at least a part of the filler component contains a steel fiber manufactured by a chattering vibration cutting method.
【０００６】ビビリ振動切削法は切刃に自励振動を与え
て金属ブロックから直接短繊維を製造する方法で、この
方法により製造されるスチール繊維は、従来から摩擦材
に使用されているスチール繊維と比較して繊維形状がま
っすぐで、表面に鋸の刃のようなギザギザの形状を持っ
ている。また、ビビリ振動切削法により製造されるスチ
ール繊維は、従来の切削法により製造されるスチール繊
維に比べ、製造過程で繊維の長さ、太さが均一なものを
造ることができる。The chattering vibration cutting method is a method in which self-excited vibration is applied to a cutting edge to directly produce short fibers from a metal block. The steel fibers produced by this method are steel fibers conventionally used for friction materials. Compared with, the fiber shape is straight, and the surface has a jagged shape like a saw blade. Further, the steel fiber manufactured by the chattering vibration cutting method can have a uniform fiber length and thickness during the manufacturing process as compared with the steel fiber manufactured by the conventional cutting method.
【０００７】即ち、本発明の発明者は中，大型車用のデ
ィスクパッドとして充分に機械的強度が強く、摩耗が少
ない非石綿系摩擦材を得ることを目的として研究を重ね
た結果、ギザギザの形状を持ち、長さ、太さが比較的均
一なビビリ振動切削法によるスチール繊維を少なくとも
繊維成分の一部に含ませることにより、上記の目的を達
成できることを知得し本発明を成し遂げたのである。That is, the inventor of the present invention has conducted a study for the purpose of obtaining a non-asbestos-based friction material having a sufficiently high mechanical strength and little wear as a disk pad for medium-sized and large-sized vehicles, and as a result, a jagged surface is obtained. By achieving the present invention by knowing that the above object can be achieved by including a steel fiber having a shape, a length and a thickness which are comparatively uniform by a chattering vibration cutting method in at least a part of the fiber component, the present invention has been accomplished. is there.
【０００８】ビビリ振動切削法により製造されるスチー
ル繊維の平均径は２０〜２００μｍが望ましく２０μｍ
以下では強度が低く、２００μｍ以上では繊維間の結合
が弱くなる。また、平均繊維長に関しては０．５〜５ｍ
ｍが望ましく、それ以外は繊維間の結合が弱くなる。The average diameter of the steel fibers produced by the chattering vibration cutting method is preferably 20 to 200 μm and 20 μm.
If it is less than 200 μm, the strength is low, and if it is more than 200 μm, the bond between fibers becomes weak. Also, regarding the average fiber length, 0.5 to 5 m
m is desirable, and other than that, the bond between fibers becomes weak.
【０００９】而して本発明においてビビリ振動切削法に
より製造されたスチール繊維以外で繊維成分として使用
されるものにはアラミド繊維等の有機繊維、ガラス繊
維，ロックウール，セラミックス繊維，チタン酸カリウ
ム繊維等の無機繊維、銅，青銅，アルミニウム，黄銅等
の金属繊維が挙げられる。Thus, in the present invention, other than the steel fiber produced by the chattering vibration cutting method, those used as the fiber component include organic fibers such as aramid fiber, glass fiber, rock wool, ceramic fiber, potassium titanate fiber. And the like, and metal fibers such as copper, bronze, aluminum and brass.
【００１０】また、結合材として使用されるものにはフ
ェノール樹脂，尿素樹脂，メラミン樹脂またはそれらの
変成樹脂のような熱硬化性樹脂やポリアセタール、芳香
族ポリイミド樹脂、フッ素樹脂等の耐熱性樹脂が挙げら
れ、充填材成分として使用されるものには黒鉛，金属
粉，二硫化モリブデン，カシューダストのような潤滑作
用のあるものや硫酸バリウム，炭酸カルシウム等が挙げ
られる。The binder used is a thermosetting resin such as phenol resin, urea resin, melamine resin or modified resin thereof, or heat resistant resin such as polyacetal, aromatic polyimide resin or fluororesin. Among them, those used as the filler component include graphite, metal powder, molybdenum disulfide, cashew dust, etc. having a lubricating action, barium sulfate, calcium carbonate and the like.
【００１１】[0011]
【発明の作用】本発明摩擦材は非石綿系摩擦材であっ
て、繊維成分の少なくとも一部にビビリ振動切削法によ
り製造されたスチール繊維を含ませることにより繊維間
の結合を強化できるので、従来のスチール繊維を用いた
摩擦材と比較して、機械的強度が増加し耐摩耗性が向上
する。The friction material of the present invention is a non-asbestos friction material, and since the steel fibers produced by the chattering vibration cutting method are contained in at least a part of the fiber components, the bond between the fibers can be strengthened. Compared with conventional friction materials using steel fibers, mechanical strength is increased and wear resistance is improved.
【００１２】[0012]
【実施例】次に本発明の実施例について説明する。繊維
基材としてビビリ振動切削法により製造されたスチール
繊維、結合材としてフェノール樹脂をそれぞれ用い、充
填材としてカシューダスト，酸化亜鉛，硫酸バリウム，
酸化マグネシウム，二硫化モリブデン，黒鉛，三硫化ア
ンチモンを用いてこれらを均一に混合し、室温，圧力４
００ｋｇ／ｃｍ2 で１分間予備成型を行ない、次いで温
度１５０℃，圧力６００ｋｇ／ｃｍ2 で１５分間加熱加
圧成型した後、２００℃で５時間熱処理して表１に示す
組成の実施例Ａ〜Ｃの中型車ディスクブレーキ用の摩擦
材を得た。EXAMPLES Next, examples of the present invention will be described. Steel fiber manufactured by the chattering vibration cutting method as the fiber base material, phenol resin as the binding material, cashew dust, zinc oxide, barium sulfate as the filling material,
Magnesium oxide, molybdenum disulfide, graphite, and antimony trisulfide are mixed evenly at room temperature and pressure 4
Pre-molding was performed at 00 kg / cm 2 for 1 minute, followed by heat and pressure molding at a temperature of 150 ° C. and a pressure of 600 kg / cm 2 for 15 minutes, followed by heat treatment at 200 ° C. for 5 hours, and the composition of Example A to Table 1 A friction material for a medium-sized car disc brake of C was obtained.
【００１３】また、上記実施例において、ビビリ振動切
削法により製造されたスチール繊維の替わりに従来から
使用されているスチール繊維を用いて表１に示す比較例
ａ〜ｃの摩擦材を同様にして得た。尚、表１の数値は体
積％を示す。上記の方法により作製した実施例Ａ〜Ｃ及
び比較例ａ〜ｃの摩擦材について、剪断強度試験（ＪＡ
ＳＯ Ｃ４４４−７８）の結果及びフルサイズダイナモ
メータ試験（ＪＡＳＯ Ｃ４２７−８３，イナーシャ４
０ｋｇｍｓ2 ）により耐摩耗性をテストした結果を表２
に示す。尚、イナーシャ４０ｋｇｍｓ2 は４トン〜５ト
ン車の定積加重状態に相当する。表２から明らかなよう
に、本発明を使用した摩擦材は、機械的強度が優れ、高
負荷がかかった状態においても摩耗が少なく、特に摩擦
材が高温になった場合、きわめて優れた耐摩耗性を示
す。またフルサイズダイナモメータ試験において本発明
摩擦材は摩擦性能、対面攻撃性等に関して、比較例の摩
擦材とともに良好な評価が得られた。Further, in the above-mentioned examples, the conventional frictional materials of Comparative Examples a to c shown in Table 1 were similarly substituted by using the steel fibers conventionally used in place of the steel fibers produced by the chattering vibration cutting method. Obtained. In addition, the numerical value of Table 1 shows volume%. A shear strength test (JA) was performed on the friction materials of Examples A to C and Comparative Examples a to c produced by the above method.
SO C444-78) results and full size dynamometer test (JASO C427-83, inertia 4
Table 2 shows the results of abrasion resistance test with 0 kgms 2 ).
Shown in. Incidentally, the inertia 40 kgms 2 corresponds to a constant volume weighted state of a 4 ton to 5 ton vehicle. As is clear from Table 2, the friction material of the present invention has excellent mechanical strength and shows little wear even under a high load condition. Shows sex. In addition, in the full size dynamometer test, the friction material of the present invention was evaluated as good as the friction material of Comparative Example with respect to the friction performance and the face attacking property.
【００１４】[0014]
【発明の効果】以上のように、繊維基材として石綿を含
まない本発明非石綿系摩擦材は実施例に示したように、
繊維基材の少なくとも一部にビビリ振動切削法により製
造されたスチール繊維を含むものであり、上記の通り機
械的強度及び耐摩耗性に優れているので自動車のブレー
キパッド，ブレーキライニング、クラッチフェーシング
等に使用する摩擦材、特に高負荷の下で使用される中，
大型車用のブレーキパッドとして好適である。As described above, the non-asbestos-based friction material of the present invention containing no asbestos as a fiber base material is
At least a part of the fiber base material contains steel fibers produced by the chattering vibration cutting method, and has excellent mechanical strength and wear resistance as described above, so it is an automobile brake pad, brake lining, clutch facing, etc. Friction material used for, especially under high load,
It is suitable as a brake pad for large vehicles.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【表２】 [Table 2]
Claims (3)
の熱硬化性樹脂成分と黒鉛，硫酸バリウム等の充填材成
分とを含有する非石綿系摩擦材において、前記繊維成分
の少なくとも一部にビビリ振動切削法により製造された
スチ−ル繊維を含むことを特徴とする非石綿系摩擦材。1. A non-asbestos friction material comprising a fiber component other than asbestos, a thermosetting resin component such as a phenol resin, and a filler component such as graphite or barium sulfate, and at least a part of the fiber component is chattering. A non-asbestos-based friction material comprising steel fiber produced by a vibration cutting method.
−ル繊維の含有量が摩擦材全量に対して０．５〜６５体
積％であることを特徴とする請求項１に記載の非石綿系
摩擦材。2. The non-asbestos-based material according to claim 1, wherein the content of the steel fiber produced by the chattering vibration cutting method is 0.5 to 65% by volume with respect to the total amount of the friction material. Friction material.
ール繊維の平均直径が、２０〜２００μｍ、平均長が、
０．５〜５ｍｍであることを特徴とする請求項１に記載
の非石綿系摩擦材。3. The steel fibers produced by the chattering vibration cutting method have an average diameter of 20 to 200 μm and an average length of
It is 0.5-5 mm, The non-asbestos friction material of Claim 1 characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2910792A JPH06129454A (en) | 1992-01-21 | 1992-01-21 | Nonasbestine friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2910792A JPH06129454A (en) | 1992-01-21 | 1992-01-21 | Nonasbestine friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06129454A true JPH06129454A (en) | 1994-05-10 |
Family
ID=12267116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2910792A Pending JPH06129454A (en) | 1992-01-21 | 1992-01-21 | Nonasbestine friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06129454A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990004251A1 (en) * | 1988-10-13 | 1990-04-19 | Matsushita Electric Industrial Co., Ltd. | Recording method and recording apparatus |
| EP1291542A2 (en) | 2001-07-30 | 2003-03-12 | Nisshinbo Industries, Inc. | Non-asbestos-based friction materials |
| CN103527683A (en) * | 2013-10-18 | 2014-01-22 | 江苏祥龙摩擦材料有限公司 | Novel metal-free carbon ceramic disc brake block and manufacturing method thereof |
| JP2016044230A (en) * | 2014-08-22 | 2016-04-04 | 日立オートモティブシステムズ株式会社 | Brake friction material |
| WO2016103972A1 (en) * | 2014-12-24 | 2016-06-30 | 日本ブレーキ工業株式会社 | Friction material composition, friction material using said friction material composition, and friction member |
| CN107001915A (en) * | 2014-11-26 | 2017-08-01 | 日本制动工业株式会社 | Friction material composition, the friction material and friction member for having used the friction material composition |
-
1992
- 1992-01-21 JP JP2910792A patent/JPH06129454A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990004251A1 (en) * | 1988-10-13 | 1990-04-19 | Matsushita Electric Industrial Co., Ltd. | Recording method and recording apparatus |
| EP1291542A2 (en) | 2001-07-30 | 2003-03-12 | Nisshinbo Industries, Inc. | Non-asbestos-based friction materials |
| US6863968B2 (en) | 2001-07-30 | 2005-03-08 | Nisshinbo Industries, Inc. | Non-asbestos-based friction materials |
| CN103527683A (en) * | 2013-10-18 | 2014-01-22 | 江苏祥龙摩擦材料有限公司 | Novel metal-free carbon ceramic disc brake block and manufacturing method thereof |
| CN103527683B (en) * | 2013-10-18 | 2016-05-04 | 江苏祥龙摩擦材料有限公司 | A kind of without metal carbon ceramics disc brake pad and preparation method thereof |
| JP2016044230A (en) * | 2014-08-22 | 2016-04-04 | 日立オートモティブシステムズ株式会社 | Brake friction material |
| CN107001915A (en) * | 2014-11-26 | 2017-08-01 | 日本制动工业株式会社 | Friction material composition, the friction material and friction member for having used the friction material composition |
| US20180216686A1 (en) * | 2014-11-26 | 2018-08-02 | Japan Brake Industrial Co., Ltd. | Friction material composition, and friction material and friction member using said friction material composition |
| WO2016103972A1 (en) * | 2014-12-24 | 2016-06-30 | 日本ブレーキ工業株式会社 | Friction material composition, friction material using said friction material composition, and friction member |
| JP2016121245A (en) * | 2014-12-24 | 2016-07-07 | 日本ブレーキ工業株式会社 | Friction material composition, and friction material and friction member using the same |
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