JP3581717B2 - Non-asbestos friction material - Google Patents
Non-asbestos friction material Download PDFInfo
- Publication number
- JP3581717B2 JP3581717B2 JP04208093A JP4208093A JP3581717B2 JP 3581717 B2 JP3581717 B2 JP 3581717B2 JP 04208093 A JP04208093 A JP 04208093A JP 4208093 A JP4208093 A JP 4208093A JP 3581717 B2 JP3581717 B2 JP 3581717B2
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- asbestos
- aluminum
- metal component
- rotor
- 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 - Fee Related
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Description
【０００１】
【産業上の利用分野】
本発明は自動車のブレーキパッドやライニング或いはクラッチフェーシング等として使用される非石綿系摩擦材に関するものであり、更に詳しくは、特にローターやドラム等のような対面がアルミ合金をマトリックスとしたものと組み合わせることにより、優れた効き及び耐摩耗性を発揮すると共に対面攻撃性に優れる非石綿系摩擦材に関するものである。
【０００２】
【従来の技術】
従来は、例えば自動車のブレーキにおけるローターやドラム等の対面（摩擦材が接する面）には、主としてＦＣ２５等の鋳鉄が使用されていたが、近年になって、環境問題の見直しから、自動車の軽量化による低燃費化への検討が進み、その中で、ブレーキのローターやドラム等の軽量化素材として、主にアルミ合金よりなるものが検討され始めた。
【０００３】
又、ブレーキパッド等に使用される摩擦材に関しても、従来は基材として石綿を使用していたものが多かったが、人体への安全性の見地から、石綿を使用しない非石綿系摩擦材へ移行しつつあり、このような非石綿系摩擦材用の繊維成分としては、耐熱性有機繊維、ガラス繊維、セラミックス繊維等が、結合材としてフェノール樹脂が、更に充填材として黒鉛、硫酸バリウム、炭酸カルシウムやアルミナ粉等が用いられている。
【０００４】
【発明が解決しようとする問題点】
しかしながら、上記のようなアルミ合金をマトリックスとしたローターやドラム等に、上記のような従来の非石綿系摩擦材を適用した場合、効きの低下が生じたり、摩擦材の摩耗や対面攻撃性等の点で問題を生ずる場合が多い。
【０００５】
これは、上記ローターやドラム等の素材であるアルミ合金が、従来から使用されている鋳鉄とは硬さや伸び等の物理的特性が異なるばかりか、摩擦摩耗特性を支配している材料の凝着や研削といった諸特性を大きく左右しているためと考えられるのである。
【０００６】
本発明は、上述した従来技術の難点を解消し、特にローターやドラム等の対面がアルミ合金をマトリックスとしたものと組み合わせることにより、優れた効き及び耐摩耗性を発揮すると共に対面攻撃性に優れる非石綿系摩擦材を提供することを目的としてなされた。
【０００７】
【問題点を解決するための手段】
上記目的を達成するために本発明が採用した構成は、主としてアルミ合金よりなるローターやドラム等と組み合わせて使用される摩擦材であって、アルミニウム又はアルミニウム−銅合金を金属成分として含有させてなることを特徴とするものである。
【０００８】
以下、本発明を詳細に説明する。
【０００９】
本発明で使用する金属成分としては、具体的にはアルミニウム（Ａｌ）、又は、アルミニウム−銅合金を挙げることができる。
【００１０】
この金属成分は、アルミニウム（Ａｌ）又はアルミニウム−銅合金の一方を使用しても、それらの双方を使用しても差しつかえない。
【００１１】
又、上記金属成分の形状としては、例えば粉末、粒子、チップ、繊維等の中から、ローターやドラムにおけるアルミ合金成分や、摩擦材に含まれるその他の材料との組み合わせに基づいて任意に選択でき、大きさについても同様であるが、摩擦材の補強性を向上させると同時に、効果を向上させるという観点からは、繊維形状のものの方が好ましい。
【００１２】
勿論、上記金属成分は、上記粉末、粒子、チップ、繊維等で所定の大きさを有するものの１種類を使用しても、形状や大きさの異なるものの１種類以上を使用しても差しつかえない。
【００１３】
一方、上記金属成分の添加量は、アルミ合金製ローターやアルミ合金製ドラム等に含まれる強化材の硬度、形状や添加量等に応じて任意に選択できるが、実用上からは０．１〜３０体積％程度が望ましい。これは、０．１％以下の場合は目的とする効果を得ることができず、又、３０％以上の場合はローターやドラム等の対面への付着が多くなってブレーキジャダーを起こしたり、熱伝導率が高くなってベーパーロック等の熱害を生じる可能性があるためである。
【００１４】
尚、本発明摩擦材は、上記のようなアルミニウム又はアルミニウム−銅合金を金属成分として含有することに主たる特徴があり、その他の成分、例えば結合材や充填材には従来品と同様の成分を同様に配合することができ、従来品と同様の方法により製造することができる。
【００１５】
【発明の作用及び効果】
以上のように、本発明の非石綿系摩擦材はアルミニウム又はアルミニウム−銅合金を金属成分として含有させてなるものであるから、特にローターやドラム等のような対面がアルミ合金をマトリックスとしたものと組み合わせることにより、優れた効き及び耐摩耗性を発揮すると共に対面攻撃性に優れるものである。
【００１６】
次に本発明を実施例により説明する。
【００１７】
【実施例】
以下に示す製造条件により、実施例及び比較例の非石綿系摩擦材を製造した。
予備成形：室温、面圧４００ｋｇ／ｃｍ２
熱プレス：温度１５０℃ 圧力４００ｋｇ／ｃｍ２ １０分間加熱
熱処理：１８０℃ ５時間
【００１８】
得られた摩擦材につき、以下に示す条件によりフルサイズダイナモによる摩擦試験を行った。
測定方法：ＪＡＳＯ Ｃ４２７−８３ Ｉ＝５Ｋｇｍｓ２
ローター材：アルミ合金 ＪＩＳ ＡＣ４Ａ−Ｔ６
結果を表１に示す。尚、表１中の「Ａｌ−５０Ｃｕ粉」は銅５０重量％含有のアルミニウム合金を示す。
【００１９】
【表１】
表１から明らかなように、上記金属成分を含有する本発明の摩擦材は、広い温度範囲にわたって優れた効き及び耐摩耗性を発揮し、対面攻撃性にも優れていたが、比較例の摩擦材は、効き及び耐摩耗性が良好ではなく、しかも対面攻撃性の高いものであった。[0001]
[Industrial applications]
The present invention relates to a non-asbestos-based friction material used as a brake pad, a lining or a clutch facing of an automobile, and more particularly to a non-asbestos friction material in which a facing surface such as a rotor or a drum is made of an aluminum alloy matrix. Accordingly, the present invention relates to a non-asbestos-based friction material which exhibits excellent effect and wear resistance and has excellent face-to-face attack.
[0002]
[Prior art]
Conventionally, for example, cast iron such as FC25 is mainly used for facing surfaces (friction material is in contact) of a rotor and a drum in a brake of an automobile. Investigations have been made to reduce fuel consumption through the use of fuel, and among them, materials mainly made of aluminum alloys have started to be studied as lightweight materials such as brake rotors and drums.
[0003]
Also, as for friction materials used for brake pads, etc., in the past, asbestos was often used as a base material, but from the viewpoint of safety for the human body, non-asbestos-based friction materials that do not use asbestos have been used. The fiber components for such non-asbestos-based friction materials include heat-resistant organic fibers, glass fibers, and ceramic fibers, phenolic resins as binders, and graphite, barium sulfate, and carbonate as fillers. Calcium or alumina powder is used.
[0004]
[Problems to be solved by the invention]
However, when the above-described conventional non-asbestos-based friction material is applied to a rotor, a drum, or the like using the above-described aluminum alloy as a matrix, the effect is reduced, or the friction material is worn or face to face. In many cases.
[0005]
This is because the aluminum alloy, which is the material for the rotor and drum, differs from the conventionally used cast iron not only in physical properties such as hardness and elongation, but also in adhesion of materials that govern friction and wear characteristics. It is thought that various characteristics such as grinding and grinding are greatly affected.
[0006]
The present invention solves the above-mentioned difficulties of the conventional technology, and in particular, by combining a rotor or a drum with a facing in which an aluminum alloy is used as a matrix, exhibits excellent effect and wear resistance and has excellent facing attack. It was made to provide a non-asbestos-based friction material.
[0007]
[Means for solving the problem]
The structure adopted by the present invention to achieve the above object is a friction material mainly used in combination with a rotor or a drum made of an aluminum alloy, and contains aluminum or an aluminum-copper alloy as a metal component. It is characterized by the following.
[0008]
Hereinafter, the present invention will be described in detail.
[0009]
Specific examples of the metal component used in the present invention include aluminum (Al) or an aluminum-copper alloy.
[0010]
This metal component can be either aluminum (Al) or an aluminum-copper alloy, or both.
[0011]
The shape of the metal component can be arbitrarily selected from, for example, powder, particles, chips, fibers, and the like, based on the combination with the aluminum alloy component in the rotor or the drum, and other materials included in the friction material. The same applies to the size, but from the viewpoint of improving the reinforcing effect of the friction material and at the same time improving the effect, the fiber shape is more preferable.
[0012]
Of course, the metal component may be one of the powders, particles, chips, fibers, and the like having a predetermined size, or may be one or more of those having different shapes and sizes. .
[0013]
On the other hand, the addition amount of the metal component can be arbitrarily selected according to the hardness, shape, addition amount, and the like of the reinforcing material contained in the aluminum alloy rotor, the aluminum alloy drum, and the like. About 30% by volume is desirable. If the content is less than 0.1%, the intended effect cannot be obtained. If the content is more than 30%, adhesion to the facing surface of the rotor or the drum increases, causing brake judder or heat. This is because the conductivity may increase to cause heat damage such as vapor lock.
[0014]
Incidentally, the friction material of the present invention has a main feature that it contains aluminum or aluminum-copper alloy as a metal component as described above, and other components such as a binder and a filler have the same components as conventional products. They can be blended in the same manner, and can be manufactured by the same method as the conventional product.
[0015]
Function and effect of the present invention
As described above, since the non-asbestos-based friction material of the present invention contains aluminum or an aluminum-copper alloy as a metal component , especially the facing surface such as a rotor or a drum uses an aluminum alloy as a matrix. By combining with, it exhibits excellent effect and abrasion resistance and also has excellent face-to-face attack.
[0016]
Next, the present invention will be described with reference to examples.
[0017]
【Example】
Under the following manufacturing conditions, non-asbestos-based friction materials of Examples and Comparative Examples were manufactured.
Preforming: room temperature, surface pressure 400 kg / cm 2
Heat press: temperature 150 ° C. Pressure 400 kg / cm 2 10 minutes Heat treatment: 180 ° C. 5 hours
The obtained friction material was subjected to a friction test using a full-size dynamo under the following conditions.
Measurement method: JASO C427-83 I = 5Kgms 2
Rotor material: Aluminum alloy JIS AC4A-T6
Table 1 shows the results. In addition, "Al-50Cu powder" in Table 1 shows an aluminum alloy containing 50% by weight of copper.
[0019]
[Table 1]
As is clear from Table 1, the friction material of the present invention containing the above metal component exhibited excellent efficacy and abrasion resistance over a wide temperature range and was excellent in face-to-face aggression. The material was not good in effectiveness and abrasion resistance, and was high in face-to-face aggression.
Claims (3)
アルミニウム又はアルミニウム−銅合金を金属成分として含有させてなることを特徴とする非石綿系摩擦材。A friction material mainly used in combination with a rotor or drum made of aluminum alloy,
A non-asbestos-based friction material comprising aluminum or an aluminum-copper alloy as a metal component .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04208093A JP3581717B2 (en) | 1993-02-05 | 1993-02-05 | Non-asbestos friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04208093A JP3581717B2 (en) | 1993-02-05 | 1993-02-05 | Non-asbestos friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06228540A JPH06228540A (en) | 1994-08-16 |
| JP3581717B2 true JP3581717B2 (en) | 2004-10-27 |
Family
ID=12626076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04208093A Expired - Fee Related JP3581717B2 (en) | 1993-02-05 | 1993-02-05 | Non-asbestos friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3581717B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020259844A1 (en) * | 2019-06-27 | 2020-12-30 | Tmd Friction Services Gmbh | Friction linings for aluminum brake disks |
-
1993
- 1993-02-05 JP JP04208093A patent/JP3581717B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06228540A (en) | 1994-08-16 |
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