JP2864305B2 - Brake sliding part - Google Patents
Brake sliding partInfo
- Publication number
- JP2864305B2 JP2864305B2 JP28326191A JP28326191A JP2864305B2 JP 2864305 B2 JP2864305 B2 JP 2864305B2 JP 28326191 A JP28326191 A JP 28326191A JP 28326191 A JP28326191 A JP 28326191A JP 2864305 B2 JP2864305 B2 JP 2864305B2
- Authority
- JP
- Japan
- Prior art keywords
- pad
- composite material
- pitch
- 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.)
- 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レベルが高く、低温域での摩擦係
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。[0004] The inventors of the present invention have conducted intensive studies on the brake sliding portion made of the C / C composite material, and have determined that the reinforcing material and the densifying matrix of the disc material and the pad material are specified. In particular, the friction coefficient level is high from low to high temperatures, the friction coefficient is stable in the low temperature range, and excellent pad wear resistance is obtained. I got it.
【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、
ディスク材は熱分解炭素及びピッチを緻密化マトリック
スとするものであり、パッド材はピッチ及び熱硬化性樹
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。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 is characterized by using pyrolytic carbon and pitch as a densified matrix, and the pad material is characterized by using pitch and a thermosetting resin as a densified matrix.
【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 the desired C
/ C composite.
【００１１】（ａ）ディスク材の処理 誘導加熱コイル等により反応管内に載置した上記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
もに反応管内に供給し、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、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) Processing of disk material The above C / C placed in a reaction tube 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 reaction tube together with the H 2 gas, Ar gas or N 2 gas, and the generated pyrolytic carbon impregnates the voids and densifies them. . Next, the C / C composite material is loaded on a tank heated to a predetermined temperature, the inside of the tank is evacuated, a molten pitch is supplied, and a void generated by firing is impregnated with a matrix material. Thereafter, firing is performed at a temperature of 800 to 2500C. The C / C composite is densified by repeating the above steps. Further, if necessary, a final heat treatment is performed at a temperature of 2500 ° C. or less to obtain a C / C composite material for a disk material.
【００１２】（ｂ）パッド材の処理 所定温度に加熱された槽内に前述のＣ／Ｃ複合材を積載
し、槽内を真空とした後、溶融ピッチ及び熱硬化性樹
脂、好ましくはフェノール樹脂を順次供給し、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
してパッド材用のＣ／Ｃ複合材を得る。(B) Treatment of pad material 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. Then, a molten pitch and a thermosetting resin, preferably a phenol resin Are sequentially supplied to impregnate the voids generated by the firing with the matrix material. Thereafter, firing is performed again at a temperature of 800 to 2500C. The C / C composite is densified by repeating the above steps. Further, if necessary, a final heat treatment is performed at a temperature of 2500 ° C. or less to obtain a C / C composite material for a 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 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.
【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。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 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.
【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１１％のディスク材用のＣ／Ｃ複合材を得た。Next, 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 11%.
【００１６】製造例２ 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
た次いで、ピッチを含浸した後、加熱炉で１０００℃で
焼成した。その後にフェノール樹脂を含浸した後、加熱
炉で１０００℃まで焼成した。Production Example 2 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%. The molded body was fired in a heating furnace up to 2000 ° C., then impregnated with pitch, and fired in a heating furnace at 1000 ° C. Then, after impregnating with a phenol resin, it was baked to 1000 ° C. in a heating furnace.
【００１７】さらに、フェノール樹脂の含浸−焼成を再
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。Further, the impregnation and firing of the phenol resin were repeated again, and thereafter, a heat treatment at 2000 ° C. was performed to obtain a C / C composite material for a pad material having a porosity of 14%.
【００１８】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＝０．４〜０．４５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＝
０．２以下であった。さらに、パッド摩耗量は０．１〜
０．２ｍｍであった。Using the disk material and the pad material obtained in this way, the result of a bench test in accordance with JIS D4411 shows that a temperature of 100 to 450 ° C.
Coefficient of friction up to the high temperature range of μ = 0.4
0.5 and μ = 0.4 to 0.45, and the variation of the friction coefficient in the low temperature region is μ = 0.05 to 0.1, and the variation of the friction coefficient in the high temperature region is also μ =
0.2 or less. Furthermore, the pad wear amount is 0.1 ~
0.2 mm.
【００１９】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 / C
Using the C composite material for the disk material and the pad material, the same test as above was carried out. The results show that the friction coefficient in a low temperature range of 100 ° C. or less is μ = 0.33 to 0.35, 100 to 450 ° C.
Has a coefficient of friction in a high temperature range of μ = 0.35 to 0.4. The variation of the friction coefficient in the low temperature range is μ =
0.10 to 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.
【００２０】[0020]
【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、ディスク材に熱分解炭素及び
ピッチを緻密化マトリックスとするＣ／Ｃ複合材を用
い、パッド材にピッチ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
での摩擦係数が安定し、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 a brake sliding portion of a C / C composite material, a disk material is made of a C / C composite material having a densified matrix of pyrolytic carbon and pitch, and a pad material is used as a pad material. By using a C / C composite material using a pitch and a thermosetting resin as a densifying matrix, the friction coefficient level from low to high temperatures is high, the friction coefficient in low temperatures is stable, and 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 (56)参考文献 特開 昭60−8536（ＪＰ，Ａ) 特開 昭62−96364（ＪＰ，Ａ) 特開 平１−176273（ＪＰ，Ａ) 特開 昭63−274664（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F16D 69/02 F16D 65/12 F16D 69/00──────────────────────────────────────────────────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-60-8536 (JP, A) JP-A-62-96364 (JP, A) JP-A-1-176273 (JP, A) JP-A-63-274664 (JP, A) (58) Survey Field (Int.Cl. 6 , DB name) F16D 69/02 F16D 65/12 F16D 69/00
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、ディスク材は熱分解炭素及びピッチを緻密化マトリ
ックスとするものであり、パッド材はピッチ及び熱硬化
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. 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. It is composed of a fiber reinforced carbon composite material, wherein the disc material has pyrolytic carbon and pitch as a densifying matrix, and the pad material has pitch and thermosetting resin as a densifying matrix. Brake sliding part.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28326191A JP2864305B2 (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 |
|---|---|---|---|
| JP28326191A JP2864305B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06159414A JPH06159414A (en) | 1994-06-07 |
| JP2864305B2 true JP2864305B2 (en) | 1999-03-03 |
Family
ID=17663167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28326191A Expired - Lifetime JP2864305B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2864305B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710779B1 (en) * | 1994-10-25 | 2000-03-22 | Mitsubishi Chemical Corporation | Sliding unit for a brake |
-
1991
- 1991-10-29 JP JP28326191A patent/JP2864305B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06159414A (en) | 1994-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5398784A (en) | Brake friction composite with reinforcing pyrolytic carbon and thermosetting resin | |
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