JP2805263B2 - Brake sliding part - Google Patents
Brake sliding partInfo
- Publication number
- JP2805263B2 JP2805263B2 JP28326091A JP28326091A JP2805263B2 JP 2805263 B2 JP2805263 B2 JP 2805263B2 JP 28326091 A JP28326091 A JP 28326091A JP 28326091 A JP28326091 A JP 28326091A JP 2805263 B2 JP2805263 B2 JP 2805263B2
- Authority
- JP
- Japan
- Prior art keywords
- composite material
- pad
- disk
- carbon
- 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
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- Braking Arrangements (AREA)
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
温域にわたって摩擦係数レベルが高く、高温域での摩擦
係数安定化に優れ、かつ低温域でのレスポンス性（ブレ
ーキングでの食い付き性）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, high friction coefficient level from low to high temperature range, excellent stabilization of friction coefficient in high temperature range, and excellent response in low temperature range (biting in braking) 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、
ディスク材及び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し、互いに異なる温度の最終熱
処理を受けた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 disc material and the pad material are characterized in that pyrolytic carbon and thermosetting resin are used as densified matrices and have been subjected to final heat treatment at different temperatures.
【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】（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、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、８００〜１０００℃
の温度で焼成し、含浸した熱硬化性樹脂を炭素化する。
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１５００℃以上２０００℃以
下、好ましくは１８００℃以下で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 in a tank heated to a predetermined temperature, and the inside of the tank is evacuated. Then, a thermosetting resin, preferably a phenol resin, is supplied to impregnate the voids with the matrix material. After this, 800-1000 ° C
Baking at the temperature described above to carbonize the impregnated thermosetting resin.
The C / C composite is densified by repeating the resin impregnation step. Further, a final heat treatment is performed at 1500 ° C. or more and 2000 ° C. or less, preferably 1800 ° C. or less to obtain a C / C composite material for a disk material.
【００１２】（ｂ）パッド材の処理 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 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 placed in a tank heated to a predetermined temperature, and after the inside of the tank is evacuated, a thermosetting resin, preferably a phenol resin, is supplied to impregnate the voids with the matrix material. After this, 800 ~ 2500C
Firing at a temperature of The C / C composite is densified by repeating the resin impregnation step. Further 2500
C / C for pad material after final heat treatment at a temperature below ℃
Obtain a composite.
【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 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 1 A pitch-based carbon fiber having a length of 10 mm and a filament number of 4000 was wet-fibrillated, and then an outer cylinder of 300 mm and an inner cylinder of 120 mm.
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.
【００１５】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, placed in a mold having the same inner and outer diameters as above, and molded and cured at a temperature of 250 ° C., and a 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.
【００１６】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１７００℃の熱処理を行
って気孔率１３％のディスク材用のＣ／Ｃ複合材を得
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 1700 ° C. to obtain a C / C composite material for a disk material having a porosity of 13%.
【００１７】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 filament number of 4000 was wet-fibrillated, and then an outer cylinder of 300 mm and an inner cylinder of 120 mm.
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.
【００１８】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 phenolic resin, dried to form a prepreg, placed in a mold having the same inner and outer diameters as above, and molded and cured at a temperature of 250 ° C., and a 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.
【００１９】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。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 16%.
【００２０】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、いずれもμ＝０．４
５〜０．５であった。また、低温域及び高温域における
摩擦係数のバラツキは、それぞれμ＝０．１５〜０．２
及びμ＝０．０１〜０．０５であった。さらに低温レス
ポンス性が極めて良好であった。The results of a bench test in accordance with JIS D4411 using the disk material and pad edge obtained in this manner show that the temperature range is from 100 ° C. or lower to 100 ° C. to 450 ° C.
Coefficient of friction up to the high temperature range of
5-0.5. Further, the dispersion of the friction coefficient in the low temperature range and the high temperature range is μ = 0.15 to 0.2, respectively.
And μ = 0.01 to 0.05. Furthermore, the low-temperature response was extremely good.
【００２１】比較例１ 従来品の、ＣＶＤ難黒鉛化性炭素をマトリックスとし、
気孔率１６％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＝０．３３〜０．３
５、１００〜４５０℃の高温域での摩擦係数は、μ＝
０．３５〜０．４であった。また、低温域及び高温域に
おける摩擦係数のバラツキは、それぞれμ＝０．１〜
０．１５及びμ＝０．０５〜０．１であった。さらに低
温レスポンス性は良好であった。COMPARATIVE EXAMPLE 1 Conventionally, a non-graphitizable carbon of CVD was used as a matrix,
Using a C / C composite material having a porosity of 16% for the disk material and the pad material, the same test as above was performed.
The friction coefficient in the following low temperature range is μ = 0.33 to 0.3.
5. The coefficient of friction in the high temperature range of 100 to 450 ° C. is μ =
It was 0.35-0.4. Further, the variation of the friction coefficient in the low temperature range and the high temperature range is μ = 0.1 to 0.1, respectively.
0.15 and μ = 0.05-0.1. Furthermore, the low-temperature response was good.
【００２２】[0022]
【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、ディスク材及びパッド材は熱
分解炭素及び熱硬化性樹脂を緻密化マトリックスとし、
互いに異なる温度の最終熱処理を受けたものを用いるこ
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、かつ、低温レスポンス性に優れ、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 disc material and the pad material are made of pyrolytic carbon and thermosetting resin as a densified matrix,
By using those that have been subjected to final heat treatment at different temperatures, it is possible to obtain a brake sliding part that has a high friction coefficient level from low to high temperatures, has excellent low-temperature response, and has a stable braking effect. Can be.
───────────────────────────────────────────────────── 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 昭61−2930（ＪＰ，Ａ) 特開 平３−199726（ＪＰ，Ａ) 特開 昭60−8536（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-61-2930 (JP, A) JP-A-3-199726 (JP, A) JP-A-60-8536 (JP, A) (58) Survey Field (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、ディスク材及び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し、互いに異なる温度の最
終熱処理を受けた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. A brake sliding part comprising a fiber reinforced carbon composite material, wherein the disk material and the pad material are made of pyrolytic carbon and a thermosetting resin as a densified matrix and subjected to final heat treatment at different temperatures. .
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28326091A JP2805263B2 (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 |
|---|---|---|---|
| JP28326091A JP2805263B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06159413A JPH06159413A (en) | 1994-06-07 |
| JP2805263B2 true JP2805263B2 (en) | 1998-09-30 |
Family
ID=17663153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28326091A Expired - Lifetime JP2805263B2 (en) | 1991-10-29 | 1991-10-29 | Brake sliding part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805263B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5566792A (en) * | 1994-10-25 | 1996-10-22 | Mitsubishi Chemical Corporation | Sliding unit for a brake and method of producing the same |
-
1991
- 1991-10-29 JP JP28326091A patent/JP2805263B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06159413A (en) | 1994-06-07 |
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