JP2805262B2 - Brake sliding part - Google Patents
Brake sliding partInfo
- Publication number
- JP2805262B2 JP2805262B2 JP28325891A JP28325891A JP2805262B2 JP 2805262 B2 JP2805262 B2 JP 2805262B2 JP 28325891 A JP28325891 A JP 28325891A JP 28325891 A JP28325891 A JP 28325891A JP 2805262 B2 JP2805262 B2 JP 2805262B2
- Authority
- JP
- Japan
- Prior art keywords
- pad
- disk
- composite material
- rockwell hardness
- hrp
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、摩擦、摺動特性に優れ
た炭素繊維強化炭素複合材（以下、Ｃ／Ｃ複合材とい
う）製のブレーキ摺動部に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake sliding portion made of a carbon fiber reinforced carbon composite material (hereinafter referred to as C / C composite material) having excellent friction and sliding characteristics.
【０００２】[0002]
【従来の技術】近年、車両用ディスクブレーキでは、軽
量化と性能向上の観点から、Ｃ／Ｃ複合材をディスクや
パッドのブレーキ摺動部に用いている。2. Description of the Related Art In recent years, C / C composite materials have been used for brake sliding portions of disks and pads in vehicle disk brakes from the viewpoint of weight reduction and performance improvement.
【０００３】[0003]
【発明が解決しようとする課題】しかし、Ｃ／Ｃ複合材
を用いたディスクやパッドは、温度により摩擦係数が変
化し易く、例えば制動初期等の低温域における摩擦係数
が低く、その後摩擦の進行で温度が上昇するとともに摩
擦係数が徐々にあるいは急激に高くなったり、または、
摩擦係数が低い状態のままであるという現象が生じ、安
定した制動効果が得にくかった。However, the friction coefficient of a disk or pad using a C / C composite material tends to change depending on the temperature. For example, the friction coefficient in a low-temperature region, such as at the beginning of braking, is low. And the coefficient of friction increases gradually or rapidly as the temperature rises, or
The phenomenon that the coefficient of friction remained low occurred, and it was difficult to obtain a stable braking effect.
【０００４】そこで、本発明者等は、Ｃ／Ｃ複合材製の
ブレーキ摺動部について鋭意検討を重ねた結果、ディス
ク材及びパッド材の硬度をそれぞれ特定のものとするこ
とにより、特に高温時の摩擦係数が大きく安定し、かつ
高温時レスポンス性（即ちブレーキングにおける食い付
き性）に優れ、さらには耐パッド摩耗性にも優れた特性
を得、安定した制動効果が得られることを知得した。[0004] The inventors of the present invention have made intensive studies on brake sliding portions made of a C / C composite material, and as a result, by setting the hardness of each of the disk material and the pad material to a specific value, particularly at high temperatures. The coefficient of friction is large and stable, and the response at high temperatures (ie, the biting property in braking) is excellent, and the pad wear resistance is also excellent. did.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
本発明は、ディスク及びパッドからなるブレーキ摺動部
において、ディスク材及びパッド材は、いずれも複数の
単繊維の束からなる短繊維状の炭素繊維を解繊したもの
を強化材とする炭素繊維強化炭素複合材から構成され、
ディスク材をロックウェル硬度４０〜１１０ＨＲＰと
し、パッド材をロックウェル硬度８０〜１２０ＨＲＰと
して、かつ、パッド材のロックウェル硬度がディスク材
のロックウェル硬度よりも高いことを特徴としている。According to the present invention, there is provided a brake sliding portion comprising a disk and a pad, wherein each of the disk material and the pad material is formed of a short fiber comprising a bundle of a plurality of single fibers. It is composed of a carbon fiber reinforced carbon composite material that uses defibrated carbon fiber as a reinforcing material,
The disk material has a Rockwell hardness of 40 to 110 HRP, the pad material has a Rockwell hardness of 80 to 120 HRP, and the pad material has a Rockwell hardness higher than that of the disk material.
【０００６】以下、本発明につき詳細に説明する。Hereinafter, the present invention will be described in detail.
【０００７】本発明で用いる炭素繊維としては、ピッチ
系、ＰＡＮ系あるいはレーヨン系炭素繊維等の公知のい
ずれのものも使用でき、さらに必要に応じてＳｉＣ，Ａ
ｌ2Ｏ3 ，カーボンブラックなどの無機繊維、無機物な
どを添加してもよい。As the carbon fibers used in the present invention, any of known carbon fibers such as pitch-based, PAN-based or rayon-based carbon fibers can be used.
Inorganic fibers such as l 2 O 3 and carbon black, and inorganic substances may be added.
【０００８】これら炭素繊維の形態は、複数の単繊維の
束からなるトウ，ストランド，ロービング，ヤーン等
で、これらをカッティングすることにより得られる短繊
維状のものを用いる。本発明においては、通常０．３〜
１００ｍｍ、好ましくは５〜５０ｍｍ程度の短繊維を使
用する。炭素繊維自体の径や弾性率は、一般に複合材と
して用いられる範囲で特に限定はされない。[0008] The form of these carbon fibers is tow, strand, roving, yarn, or the like made of a bundle of a plurality of single fibers, and is used as a short fiber obtained by cutting these. In the present invention, usually 0.3 ~
Short fibers of 100 mm, preferably about 5 to 50 mm are used. The diameter and elastic modulus of the carbon fiber itself are not particularly limited as long as they are generally used as a composite material.
【０００９】Ｃ／Ｃ複合材とする際に例えば特開昭６２
−９６３６４号、特開平１−１７６２７３号公報等に記
載の方法で解繊・分散してプリフォームまたはシートと
する。これらにマトリックス材を含浸して金型に充填
し、１００〜５００℃の温度で加圧成形してＶf （繊維
含有量）が５〜６５％、好ましくは１０〜５５％の成形
体を得る。その後、Ｎ2 ガスなどの不活性ガス雰囲気中
で１〜２００℃／ｈｒの昇温速度で８００〜２５００℃
迄昇温し、焼成してＣ／Ｃ複合材を得る。When a C / C composite material is used, for example, Japanese Patent Application Laid-Open
-96364, JP-A-1-176273, etc. to be defibrated and dispersed into a preform or sheet. These are impregnated with a matrix material, filled into a mold, and molded under pressure at a temperature of 100 to 500 ° C. to obtain a molded body having a V f (fiber content) of 5 to 65%, preferably 10 to 55%. . Then, at a temperature rising rate of 1 to 200 ° C./hr, 800 to 2500 ° C. in an inert gas atmosphere such as N 2 gas.
Then, the temperature is raised to a value and fired to obtain a C / C composite material.
【００１０】上述の焼成によって得られたＣ／Ｃ複合材
をディスク材及びパッド材用として、例えばそれぞれ次
の方法により緻密化処理及び最終処理を行い、目的のＣ
／Ｃ複合材を得る。The C / C composite material obtained by the above-mentioned firing is used for a disk material and a pad material, for example, subjected to a densification treatment and a final treatment by the following methods, respectively, to obtain a desired C / C composite material.
/ C composite.
【００１１】（１）熱硬化性樹脂又はピッチによる緻密
化処理 所定温度に加熱された槽に前述のＣ／Ｃ複合材を積載
し、槽内を真空とした後熱硬化性樹脂、好ましくはフェ
ノール樹脂又はピッチを供給し、焼成により生じた空隙
にマトリックスを含浸する。この後、再度８００〜２５
００℃の温度で焼成する。上記工程を繰り返すことによ
り目的のＣ／Ｃ複合材の緻密化処理を行う。(1) Densification treatment with thermosetting resin or pitch The above-mentioned C / C composite material is loaded in a tank heated to a predetermined temperature, and the inside of the tank is evacuated. The resin or the pitch is supplied, and the voids generated by firing are impregnated with the matrix. After this, 800-25 again
Bake at a temperature of 00 ° C. The densification process of the target C / C composite material is performed by repeating the above steps.
【００１２】（２）ＣＶＤによる緻密化処理 誘導加熱コイル等により反応器内に載置した上記Ｃ／Ｃ
複合材を加熱し、炭化水素類あるいはハロゲン化炭化水
素類の蒸気を、Ｈ2 ガス、Ａｒガス或いはＮ2ガスとと
もに反応器内に供給し、生成する熱分解炭素で空隙を含
浸し、緻密化する。さらに必要に応じて黒鉛化処理を行
うことができる。(2) Densification treatment by CVD The above C / C placed in a reactor by an induction heating coil or the like
The composite material is heated, and the vapor of hydrocarbons or halogenated hydrocarbons is supplied into the reactor together with the H 2 gas, Ar gas or N 2 gas, and the voids are impregnated with the generated pyrolytic carbon to densify the composite material. I do. Further, a graphitization treatment can be performed if necessary.
【００１３】本発明においては上記のようにして、ディ
スク材及びパッド材を得るに際しての目的の硬度に収ま
るように焼成温度、緻密化方法及び緻密化の程度を選択
する。強化材及びマトリックスの組合わせにより一概に
は言えないが、一般には焼成温度を高く、緻密化程度を
低くするほど硬度は低くなる。In the present invention, as described above, the firing temperature, the densification method and the degree of densification are selected so as to fall within the desired hardness for obtaining the disk material and the pad material. Although it cannot be said unconditionally depending on the combination of the reinforcing material and the matrix, in general, the higher the firing temperature and the lower the degree of densification, the lower the hardness.
【００１４】このようにして本発明においては、パッド
材には、その硬度がロックウェル硬度８０〜１２０ＨＲ
Ｐ、より好ましくは９０〜１１５ＨＲＰの範囲のＣ／Ｃ
複合材を用い、ディスク材には、４０〜１１０ＨＲＰ、
より好ましくは５５〜９５ＨＲＰの範囲のＣ／Ｃ複合材
を用い、さらにパッド材の硬度がディスク材の硬度より
も高いものを用いる。尚、パッド材の硬度がディスク材
の硬度より５ＨＲＰ以上高いことがより好ましい。Thus, according to the present invention, the pad material has a Rockwell hardness of 80 to 120 HR.
P, more preferably C / C in the range of 90-115 HRP
Using a composite material, the disc material is 40-110 HRP,
More preferably, a C / C composite material in the range of 55 to 95 HRP is used, and a material in which the hardness of the pad material is higher than the hardness of the disk material is used. It is more preferable that the hardness of the pad material is higher than the hardness of the disk material by 5 HRP or more.
【００１５】[0015]
【実施例】以下、本発明を実施例により具体的に説明す
るが、本発明はその要旨をこえない限り、下記実施例に
よって限定されるものではない。EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.
【００１６】製造例１ ３０ｍｍ長に切断したフィラメント数４０００のピッチ
系炭素繊維を解繊し、２次元ランダムに配向したシート
を得た。このシートにフェノール樹脂を含浸させた後乾
燥し、１００部の炭素繊維に対し、６５部のフェノール
樹脂を含浸したシートを作製した。このシートを金型内
へ積層し、２５０℃にて加圧成形し、Ｖf 約５０％の成
形体を得た。この成形体を加熱炉で２０００℃迄焼成し
た。Production Example 1 A pitch-based carbon fiber having 4000 filaments cut into a length of 30 mm was defibrated to obtain a two-dimensionally randomly oriented sheet. The sheet was impregnated with a phenol resin and then dried to prepare a sheet in which 100 parts of carbon fibers were impregnated with 65 parts of a phenol resin. This sheet was laminated in a mold and pressed at 250 ° C. to obtain a molded body having a Vf of about 50%. This molded body was fired in a heating furnace up to 2000 ° C.
【００１７】次いで、ピッチを含浸した後、加熱炉で１
０００℃で焼成した。さらに同様の含浸−焼成の操作を
再度繰り返しその後に２０００℃の熱処理を行って気孔
率８％のディスク材用のＣ／Ｃ複合材を得た。このもの
のロックウェル硬度は７３ＨＲＰであった。Then, after impregnating the pitch, 1 hour in a heating furnace.
It was baked at 000 ° C. Further, the same operation of impregnation and firing was repeated again, and thereafter, heat treatment was performed at 2000 ° C. to obtain a C / C composite material for a disk material having a porosity of 8%. Its Rockwell hardness was 73 HRP.
【００１８】製造例２ 長さ１０ｍｍ、フィラメント数４０００のピッチ系炭素
繊維を湿式解繊した後に、外筒３００ｍｍ、内筒１２０
ｍｍのドーナツ状の底部に網目１５０メッシュのスクリ
ーン及び更に外側に底板を有する成形用型に水とともに
投入し、均一に撹拌した後、底板を引き抜くことにより
底部から一気に溶液全量を除去して、炭素繊維が均一に
分散したドーナツ状のプリフォームを得た。Production Example 2 A pitch-based carbon fiber having a length of 10 mm and a number of filaments of 4000 was wet-fibrillated, and then an outer cylinder 300 mm and an inner cylinder 120 were prepared.
mm into a dough-shaped bottom with a mesh screen of 150 mesh and water into a mold having a bottom plate on the outside, together with water.After stirring uniformly, the whole solution was removed at once from the bottom by pulling out the bottom plate. A donut-shaped preform in which the fibers were uniformly dispersed was obtained.
【００１９】該プリフォームを乾燥した後にフェノール
樹脂を含浸し、乾燥してプリプレグとし、更に上記と同
一内外径を有する金型内に納めて２５０℃の温度で成形
・硬化し、Ｖf ５０％の成形体を得た。この成形体を加
熱炉で２０００℃迄焼成した後、高周波誘導加熱装置に
より加熱し、炭化水素蒸気を窒素ガスをキャリアーガス
として反応器内に導入して、熱分解炭素により気孔を充
填する緻密化処理を行った。After the preform is dried, it is impregnated with a phenol resin, dried to form a prepreg, further placed in a mold having the same inner and outer diameters as above, molded and cured at a temperature of 250 ° C., and V f of 50% Was obtained. This compact is fired in a heating furnace up to 2000 ° C., heated by a high-frequency induction heating device, and introduced into the reactor with hydrocarbon vapor as a carrier gas using nitrogen gas as a carrier gas. Processing was performed.
【００２０】次いで、フェノール樹脂を含浸した後、加
熱炉で１０００℃で焼成した。さらに同様の含浸−焼成
の操作を再度繰り返しその後に２０００℃の熱処理を行
って気孔率１４％のパッド材用のＣ／Ｃ複合材を得た。
このもののロックウェル硬度は９９ＨＲＰであった。Next, after impregnating with a phenol resin, it was fired at 1000 ° C. in a heating furnace. Further, the same operation of impregnation and firing was repeated again, and thereafter, heat treatment was performed at 2000 ° C. to obtain a C / C composite material for a pad material having a porosity of 14%.
Its Rockwell hardness was 99 HRP.
【００２１】このようにして得られたディスク材とパッ
ド材を用いてＪＩＳＤ４４１１に準拠するベンチテスト
の結果は、１００℃以下の低温域から１００〜４５０℃
の高温域に至るまでの摩擦係数は、それぞれμ＝０．４
〜０．５及びμ＝０．４５〜０．５と高く、低温域にお
ける摩擦係数のバラツキはμ＝０．１〜０．１５であ
り、また、高温域における摩擦係数のバラツキもμ＝
０．０５以下であった。さらに、パッド摩耗量は０．１
ｍｍ以下であった。また、高温時レスポンスが非常に良
好であった。Using the disk material and the pad material obtained in this way, the results of a bench test in accordance with JIS D4411 show that the temperature range from a low temperature range of 100 ° C. or less to 100 to 450 ° C.
Coefficient of friction up to the high temperature range of μ = 0.4
０．５0.5 and μ = 0.45 高 く 0.5, the variation of the friction coefficient in the low temperature range is μ = 0.1、0.15, and the variation of the friction coefficient in the high temperature range is also μ =
It was 0.05 or less. Furthermore, the pad wear amount is 0.1
mm or less. Further, the response at high temperature was very good.
【００２２】比較例１ 従来品のロックウェル硬度７８ＨＲＰのＣ／Ｃ複合材を
ディスク材及びパッド材に用い、上記と同様のテストを
行った結果は、１００℃以下の低温域での摩擦係数は、
μ＝０．３３〜０．３５、１００〜４５０℃の高温域で
の摩擦係数は、μ＝０．３５〜０．４であった。また、
低温域における摩擦係数のバラツキはμ＝０．１０〜
０．１５であり、また、高温域における摩擦係数のバラ
ツキはμ＝０．０５〜０．１であった。さらに、摩耗量
は０．２〜０．３ｍｍであった。また、高温時レスポン
スは良好であった。Comparative Example 1 The same test as above was conducted using a conventional C / C composite material having a Rockwell hardness of 78 HRP as a disk material and a pad material. ,
The friction coefficient in the high temperature range of μ = 0.33 to 0.35 and 100 to 450 ° C. was μ = 0.35 to 0.4. Also,
The variation of the friction coefficient in the low temperature range is μ = 0.10
0.15, and the variation of the friction coefficient in the high temperature range was μ = 0.05 to 0.1. Further, the wear amount was 0.2 to 0.3 mm. The response at high temperature was good.
【００２３】[0023]
【発明の効果】本発明は以上のように、ディスク材にロ
ックウェル硬度４０〜１１０ＨＲＰのＣ／Ｃ複合材を用
い、パッド材にロックウェル硬度８０〜１２０ＨＲＰの
Ｃ／Ｃ複合材を用い、かつ、パッド材のロックウェル硬
度をディスク材のロックウェル硬度よりも高くすること
により、特に高温域での摩擦係数が大きく安定し、高温
時レスポンス性に優れ、かつ、摩耗量が少なく、制動効
果が安定したブレーキ摺動部を得ることができる。As described above, the present invention uses a C / C composite material having a Rockwell hardness of 40 to 110 HRP as a disk material, a C / C composite material having a Rockwell hardness of 80 to 120 HRP as a pad material, and By making the Rockwell hardness of the pad material higher than the Rockwell hardness of the disc material, the coefficient of friction is particularly large and stable in high temperature regions, and the response at high temperatures is excellent, and the amount of wear is small, and the braking effect is small. A stable brake sliding portion can be obtained.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柳沢 正弘 長野県上田市大字国分840番地 日信工 業株式会社内 (72)発明者 奥山 公平 神奈川県横浜市緑区鴨志田町1000番地 三菱化成株式会社総合研究所内 (72)発明者 丹羽 一夫 香川県坂出市番の州町１番地 三菱化成 株式会社坂出工場内 (72)発明者 深川 敏弘 香川県坂出市番の州町１番地 三菱化成 株式会社坂出工場内 (56)参考文献 特開 昭63−274664（ＪＰ，Ａ) 特開 平２−129419（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F16D 69/02 F16D 65/12──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiro Yanagisawa 840 Kokubu, Ueda-shi, Nagano Nissin Kogyo Co., Ltd. Within the Research Institute (72) Inventor Kazuo Niwa 1 Bancho-cho, Sakaide-shi, Kagawa Prefecture Mitsubishi Sakaide Co., Ltd. References JP-A-63-274664 (JP, A) JP-A-2-129419 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) F16D 69/02 F16D 65/12
Claims (1)
動部において、ディスク材及びパッド材は、いずれも複
数の単繊維の束からなる短繊維状の炭素繊維を解繊した
ものを強化材とする炭素繊維強化炭素複合材から構成さ
れ、ディスク材をロックウェル硬度４０〜１１０ＨＲＰ
とし、パッド材をロックウェル硬度８０〜１２０ＨＲＰ
として、かつ、パッド材のロックウェル硬度がディスク
材のロックウェル硬度よりも高いことを特徴とするブレ
ーキ摺動部。1. A brake sliding portion comprising a disk and a pad, wherein each of the disk material and the pad material is made of a carbon fiber having a reinforcing fiber made of a short fibrous carbon fiber made of a bundle of a plurality of single fibers. Made of fiber reinforced carbon composite material, the disk material is Rockwell hardness 40-110 HRP
And the pad material is Rockwell hardness 80-120 HRP
Wherein the Rockwell hardness of the pad material is higher than the Rockwell hardness of the disc material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28325891A JP2805262B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28325891A JP2805262B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06159411A JPH06159411A (en) | 1994-06-07 |
| JP2805262B2 true JP2805262B2 (en) | 1998-09-30 |
Family
ID=17663128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28325891A Expired - Lifetime JP2805262B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805262B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311112C2 (en) * | 1993-04-05 | 1995-05-04 | Media Tech Vertriebs Gmbh | Video projection device for projecting video images |
-
1991
- 1991-10-29 JP JP28325891A patent/JP2805262B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06159411A (en) | 1994-06-07 |
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