JPH06159412A - Brake sliding section - Google Patents
Brake sliding sectionInfo
- Publication number
- JPH06159412A JPH06159412A JP28325991A JP28325991A JPH06159412A JP H06159412 A JPH06159412 A JP H06159412A JP 28325991 A JP28325991 A JP 28325991A JP 28325991 A JP28325991 A JP 28325991A JP H06159412 A JPH06159412 A JP H06159412A
- Authority
- JP
- Japan
- Prior art keywords
- pad
- carbon
- composite material
- disk
- brake sliding
- 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
Landscapes
- Braking Arrangements (AREA)
Abstract
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, in a vehicle disc brake, a C / C composite material has been used for a brake sliding portion of a disc or a pad 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 the disk or pad using the C / C composite material is apt to change with temperature, and for example, the friction coefficient is low in a low temperature region such as the initial stage of braking, and then the friction progresses. The friction coefficient gradually or rapidly rises as the temperature rises, or
The phenomenon that the coefficient of friction remained low remained, 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強化材及び緻密化マトリックスをそ
れぞれ特定のものとすることにより、特に低温域から高
温域にわたり摩擦係数が大きく、低温時の摩擦係数の安
定化に優れ、かつ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。Therefore, the inventors of the present invention have made extensive studies on the brake sliding portion made of the C / C composite material, and as a result, have specified the reinforcing material and the densified matrix of the disk material and the pad material, respectively. Has a large coefficient of friction especially from low temperature to high temperature, has excellent stability of friction coefficient at low temperature, and also has excellent pad wear resistance.
We have learned that a stable braking effect can be obtained.
【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、
ディスク材はピッチを緻密化マトリックスとするもので
あり、パッド材は熱分解炭素及び熱硬化性樹脂を緻密化
マトリックスとするものであることを特徴としている。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a brake sliding portion composed of a disc and a pad, wherein the disc material and the pad material are both short fiber-shaped fibers each consisting of a bundle of a plurality of single fibers. Composed of carbon fiber reinforced carbon composite material, which is made by defibrating the carbon fiber of
The disk material is characterized by using pitch as a densified matrix, and the pad material is characterized by using pyrolytic carbon and a thermosetting resin as a densified matrix.
【０００６】以下、本発明につき詳細に説明する。The present invention will be described in detail below.
【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 fiber used in the present invention, any known carbon fiber such as pitch-based, PAN-based or rayon-based carbon fiber can be used, and if necessary, SiC, A
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。The form of these carbon fibers is a tow, a strand, a roving, a yarn or the like which is composed of a bundle of a plurality of single fibers, and a short fiber form obtained by cutting these is used. In the present invention, usually 0.3 to
Short fibers of about 100 mm, preferably about 5 to 50 mm are used. The diameter and elastic modulus of the carbon fiber itself are not particularly limited within the range 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 making a C / C composite material, for example, JP-A-62-62
-96364, JP-A-1-176273, and the like to defibrate and disperse to obtain a preform or sheet. These are impregnated with a matrix material, filled in a mold, and pressure-molded at a temperature of 100 to 500 ° C. to obtain a molded product having V f (fiber content) of 5 to 65%, preferably 10 to 55%. . Then, in an inert gas atmosphere such as N 2 gas at a temperature rising rate of 1 to 200 ° C./hr and 800 to 2500 ° C.
The temperature is raised up to the temperature and is 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 subjected to a densification treatment and a final treatment, for example, by the following methods for disc material and pad material, respectively.
/ C composite material is obtained.
【００１１】（ａ）ディスク材の処理 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、溶融ピッチを供給し、焼成に
より生じた空隙にマトリックス材を含浸する。この後、
再度８００〜２５００℃の温度で焼成する。上記工程を
繰り返すことによりＣ／Ｃ複合材の緻密化処理を行う。
さらに必要により２５００℃以下の温度にて最終熱処理
をしてディスク材用のＣ／Ｃ複合材を得る。(A) Treatment of disk material The above-mentioned C / C composite material is loaded into a tank heated to a predetermined temperature, the inside of the tank is evacuated, a molten pitch is supplied, and a matrix is created in the voids formed by firing. Impregnate the material. After this,
Baking again at a temperature of 800 to 2500 ° C. The C / C composite material is densified by repeating the above steps.
Further, if necessary, final heat treatment is performed at a temperature of 2500 ° C. or lower to obtain a C / C composite material for disk material.
【００１２】（ｂ）パッド材の処理 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。次いで、該Ｃ／Ｃ複合材を所定温度
に加熱された槽に載置し、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を供給して空隙にマ
トリックス材を含浸する。この後、８００〜２５００℃
の温度で焼成する。上記樹脂含浸工程を繰り返すことに
よりＣ／Ｃ複合材の緻密化処理を行う。さらに必要によ
り２５００℃以下の温度にて最終熱処理をしてパッド材
用のＣ／Ｃ複合材を得る。(B) Treatment of pad material The above C / C placed in the reactor by an induction heating coil or the like.
The composite material is heated, steams of hydrocarbons or halogenated hydrocarbons are supplied into the reactor together with H 2 gas, Ar gas or N 2 gas, and voids are impregnated with the generated pyrolytic carbon to densify. To do. Then, the C / C composite material is placed in a tank heated to a predetermined temperature, the inside of the tank is evacuated, and then a thermosetting resin, preferably a phenol resin is supplied to impregnate the voids with the matrix material. After this, 800-2500 ° C
Bake at the temperature of. The C / C composite material is densified by repeating the resin impregnation step. Further, if necessary, final heat treatment is performed at a temperature of 2500 ° C. or lower to obtain a C / C composite material for pad material.
【００１３】[0013]
【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 The present invention will now be described in detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.
【００１４】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 Pitch-based carbon fiber having 4000 filaments cut into 30 mm length was defibrated to obtain a sheet oriented two-dimensionally at random. This sheet was impregnated with phenol resin and then dried to prepare a sheet in which 65 parts of phenol resin was impregnated with respect to 100 parts of carbon fiber. This sheet was laminated in a mold and pressure-molded at 250 ° C. to obtain a molded body having V f of about 50%. The compact was fired to 2000 ° C. in a heating furnace.
【００１５】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。Next, after impregnating the pitch, 1 in a heating furnace
It was baked at 000 ° C. Further, the same impregnation-firing operation was repeated again, and then heat treatment at 2000 ° C. was performed to obtain a C / C composite material for a disk material having a porosity of 8%.
【００１６】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 Pitch-based carbon fiber having a length of 10 mm and a number of filaments of 4000 was wet defibrated, and then an outer cylinder 300 mm and an inner cylinder 120
mm donut-shaped bottom with a screen having a mesh of 150 mesh and a bottom plate on the outside, together with water, put into a molding die and stirred evenly. A donut-shaped preform in which the fibers were uniformly dispersed was obtained.
【００１７】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 and dried to form a prepreg, which is then 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 50%. A molded body of was obtained. After densifying this molded body in a heating furnace to 2000 ° C., it is heated by a high frequency induction heating device, and hydrocarbon vapor is introduced into the reactor as a carrier gas of nitrogen gas, and densification is performed by filling pores with pyrolytic carbon. Processed.
【００１８】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１６％のパッド材用のＣ／Ｃ複合材を得た。Then, after impregnating with the phenol resin, it was baked at 1000 ° C. in a heating furnace. Further, the same impregnation-firing operation was repeated again, and then heat treatment at 2000 ° C. was performed to obtain a C / C composite material for a pad material having a porosity of 16%.
【００１９】このようにして得られたディスク材とパッ
ド際を用いて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＝０．５
〜０．５５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＝０．０５〜０．１であ
り、また、高温域における摩擦係数のバラツキもμ＝
０．１以下であった。さらに、パッド摩耗量は０．１ｍ
ｍ以下であった。Bench test results in accordance with JIS D4411 using the thus obtained disc material and pad area show that the temperature is from 100 ° C. or lower to 100 to 450 ° C.
Friction coefficient up to the high temperature range of μ = 0.5
.About.0.55 and .mu. = 0.45 to 0.5, the variation of the friction coefficient in the low temperature region is .mu. = 0.05 to 0.1, and the variation of the friction coefficient in the high temperature region is .mu. =
It was 0.1 or less. Furthermore, pad wear amount is 0.1m
It was m or less.
【００２０】比較例１ 従来品の、ＣＶＤによる炭素をマトリックスとした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。Comparative Example 1 C / of a conventional product using CVD carbon as a matrix
As a result of performing the same test as above using the C composite material as the disk material and the pad material, the friction coefficient in the low temperature range of 100 ° C. or lower is μ = 0.33 to 0.35, 100 to 450 ° C.
The friction coefficient in the high temperature range of was 0.30 to 0.4. Further, the variation of the friction coefficient in the low temperature range is μ =
The coefficient of friction was 0.10 to 0.15, and the variation in the friction coefficient in the high temperature range was μ = 0.05 to 0.1. Further, the amount of wear was 0.2 to 0.3 mm.
【００２１】[0021]
【発明の効果】本発明は以上のように、Ｃ／Ｃ複合材の
ブレーキ摺動部において、ディスク材にピッチを緻密化
マトリックスとするＣ／Ｃ複合材を用い、パッド材に熱
分解炭素及び熱硬化性樹脂を緻密化マトリックスとする
Ｃ／Ｃ複合材を用いることにより、低温域から高温域に
至るまでの摩擦係数レベルが高く、低温域での摩擦係数
の安定化に優れ、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, according to the present invention, in the brake sliding portion of the C / C composite material, the C / C composite material in which the pitch is the densified matrix is used as the disc material, and the pyrolysis carbon and the pad material are used. By using a C / C composite material in which a thermosetting resin is used as a densified matrix, the friction coefficient level from the low temperature range to the high temperature range is high, and the friction coefficient is stable in the low temperature range, and the wear is high. It is possible to obtain a brake sliding portion having a small amount and a stable braking effect.
───────────────────────────────────────────────────── 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masahiro Yanagisawa Inventor Masahiro Ueda City, Nagano Prefecture 840 Kokubu, Nissin Industry Co., Ltd. (72) Inventor Kohei Okuyama 1000 Kamoshida-cho, Midori-ku, Yokohama-shi, Kanagawa Sanryo Kasei Co., Ltd. Inside the Research Institute (72) Inventor Kazuo Niwa, No. 1 state town in Sakaide City, Kagawa Prefecture, Sakaide Factory, Mitsubishi Chemical Co., Ltd. (72) Toshihiro Fukagawa, No. 1 state town, Sakaide City, Kagawa Prefecture, Sakaide Factory, Mitsubishi Chemical Corporation
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、ディスク材はピッチを緻密化マトリックスとするも
のであり、パッド材は熱分解炭素及び熱硬化性樹脂を緻
密化マトリックスとするものであることを特徴とするブ
レーキ摺動部。1. In a brake sliding portion composed of a disc and a pad, the disc material and the pad material each have a carbon fiber obtained by defibrating short fiber carbon fibers composed of a bundle of a plurality of single fibers as a reinforcing material. A brake slide characterized by comprising a fiber-reinforced carbon composite material, a disc material having a densified matrix of pitch, and a pad material having a densified matrix of pyrolytic carbon and a thermosetting resin. Moving part.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28325991A JP2864304B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
| US07/966,954 US5398784A (en) | 1991-10-29 | 1992-10-27 | Brake friction composite with reinforcing pyrolytic carbon and thermosetting resin |
| US08/281,130 US5439080A (en) | 1991-10-29 | 1994-07-28 | Pitch-reinforced carbon fiber brake disc and pyrolytic carbon/resin-reinforced carbon fiber friction pads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28325991A JP2864304B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06159412A true JPH06159412A (en) | 1994-06-07 |
| JP2864304B2 JP2864304B2 (en) | 1999-03-03 |
Family
ID=17663141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28325991A Expired - Lifetime JP2864304B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2864304B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311112A1 (en) * | 1993-04-05 | 1995-01-19 | Media Tech Vertriebs Gmbh | Video projection device for projecting video images |
| EP0710779A3 (en) * | 1994-10-25 | 1996-05-15 | Mitsubishi Chemical Corporation | Sliding unit for a brake and method of producing the same |
-
1991
- 1991-10-29 JP JP28325991A patent/JP2864304B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311112A1 (en) * | 1993-04-05 | 1995-01-19 | Media Tech Vertriebs Gmbh | Video projection device for projecting video images |
| EP0710779A3 (en) * | 1994-10-25 | 1996-05-15 | Mitsubishi Chemical Corporation | Sliding unit for a brake and method of producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2864304B2 (en) | 1999-03-03 |
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