JPH0252695B2

JPH0252695B2 -

Info

Publication number: JPH0252695B2
Application number: JP58000931A
Authority: JP
Inventors: Fujimatsu Takiguchi
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1983-01-07
Filing date: 1983-01-07
Publication date: 1990-11-14
Also published as: JPS59126738A

Description

[Detailed description of the invention]

本発明は、刷子用摺動接点材料の改良に関す
る。従来、摺動接点材料としては各種材料が用いら
れ、とりわけ刷子用摺動接点材料としては、
Au70.5〜72.5重量％、Pt7.5〜9.5重量％、Ag3.5
〜5.5重量％、CU13.5〜15.5重量％、Zn0.5〜1.5重
量％、より成る合金材料が広く用いられていた
（昭和40年７月８日に工業日日新聞社から発行さ
れた日本電子材料技術協会編の新しい接点材料第
115頁参照）。この合金材料は、とりわけ機械的強度、耐蝕
性、ばね性等の優れた特性を有し、各元素の複合
添加による相乗効果と相俟つて、特にAu、Ptに
よる耐蝕性、Ag、Pt、Cuによるばね性、Cu、
Pt、Auなどによる機械的強度、Znの鋳造性、加
工性の点に着目されて、Au、Pt、Ag、Cu、Zn
などの元素及び含有量を限定されて成るものであ
る。然し乍ら、この合金材料で製作した刷子接点で
は軟化温度が低く、整流子との摺動時に凝集しや
すいため、耐摩耗性が劣り、摩耗粉が生じ易く、
接触抵抗が不安定でノイズ発生の原因となつてい
た。本発明は、斯かる欠点を解消すべくなされたも
のであり、前記合金材料を基材としてこれに特定
の材料を僅かに添加させて、軟化温度を高めて、
耐摩耗性、接触抵抗特性を向上させた刷子用摺動
接点材料を提供せんとするものである。本発明の刷子用摺動接点材料は、組成比で
Au70.5〜72.5重量％、Pt7.5〜9.5重量％、Ag3.5
〜5.5重量％、Cu13.5〜15.5重量％、Zn0.5〜1.5重
量％のAu−Pt−Ag−Cu−Znが93〜99.5重量％及
び残部がＷ、Ｖ及びTaの少なくとも一種を合計
で0.5〜７重量％から成るものである。本発明の刷子用摺動接点材料に於いて、組成比
でAu70.5〜72.5重量％、Pt7.5〜9.5重量％、
Ag3.5〜5.5重量％、Cu13.5〜15.5重量％、Zn0.5
〜1.5重量％のAu−Pt−Ag−CU−Znが93〜99.5
重量％及び残部がＷ、Ｖ及びTaの少なくとも一
種を合計で0.5〜７重量％としている理由は、前
記従来の合金材料の耐摩耗性、接触抵抗の安定性
を向上すべく軟化温度を高くする為で、Ｗ、Ｖ及
びTaのうち少なくとも一種を合計で0.5重量％未
満では軟化温度を高めて凝着を防止する効果を発
揮できず、Ｗ、Ｖ及びTaのうち少なくとも一種
を合計で７重量％を超えると酸化物の発生量が多
くなり、接触抵抗が高くなり、その上不安定とな
るものである。また、Au、Pt、Ag、Cu、Znの
含有量は、前記従来の合金材料の組成比に変更を
加えない範囲とすることにより、従来の合金材料
の特性は損なわれることなく発揮されることとな
るものである。次に従来の合金材料を基材とし、これにＷを添
加し、表の実施例１に示す成分組成の刷子用摺動
接点材料とし、以下同様にして表に示す成分組成
の本発明による刷子用摺動接点材料と従来の刷子
用摺動接点材料を用いて夫々線径0.7mmの刷子線
材を作り、これを各々長さ８mmに切断し、２本並
列させて一端を幅10mm、長さ13mm、厚さ0.2mmの
台材に溶接し、他端に2Rの円弧状の接触部を曲
成して刷子接点を作つた。そして夫々の刷子接点
を円盤状の整流子に接触させ、整流子を正逆回転
させて下記の試験条件にて摺動試験を行い、摩耗
量及び接触抵抗を測定した処、下記の表の右欄に
示すような結果を得た。試験条件電流：直流0.6A 電圧：12V 負荷：抵抗負荷回転速度：1000回転／分周速：130〜120m／min 接触力：100ｇ試験時間：７時間 The present invention relates to improvements in sliding contact materials for brushes. Conventionally, various materials have been used as sliding contact materials, and in particular, as sliding contact materials for brushes,
Au70.5~72.5wt%, Pt7.5~9.5wt%, Ag3.5
~5.5% by weight, CU13.5~15.5% by weight, and Zn0.5~1.5% by weight. New Contact Materials edited by the Electronic Materials Technology Association
(See page 115). This alloy material has particularly excellent properties such as mechanical strength, corrosion resistance, and spring properties, and together with the synergistic effect of compound addition of each element, it has particularly good corrosion resistance due to Au and Pt, Ag, Pt, and Cu. Spring properties due to Cu,
Focusing on the mechanical strength of Pt, Au, etc., and the castability and workability of Zn, Au, Pt, Ag, Cu, Zn
The elements and content are limited. However, brush contacts made of this alloy material have a low softening temperature and tend to aggregate when sliding with the commutator, resulting in poor wear resistance and easy formation of wear particles.
The contact resistance was unstable and caused noise. The present invention was made in order to eliminate such drawbacks, and uses the above-mentioned alloy material as a base material and adds a small amount of a specific material to it to increase the softening temperature.
The object of the present invention is to provide a sliding contact material for brushes with improved wear resistance and contact resistance characteristics. The sliding contact material for brushes of the present invention has a composition ratio of
Au70.5~72.5wt%, Pt7.5~9.5wt%, Ag3.5
~5.5 wt%, Cu13.5~15.5 wt%, Zn0.5~1.5 wt% Au-Pt-Ag-Cu-Zn is 93-99.5 wt% and the balance is at least one of W, V and Ta in total. It consists of 0.5 to 7% by weight. In the sliding contact material for brushes of the present invention, the composition ratio is 70.5 to 72.5% by weight of Au, 7.5 to 9.5% by weight of Pt,
Ag3.5~5.5wt%, Cu13.5~15.5wt%, Zn0.5
~1.5 wt% Au-Pt-Ag-CU-Zn 93-99.5
The reason why the weight % and the balance is 0.5 to 7 weight % in total of at least one of W, V, and Ta is that the softening temperature is raised to improve the wear resistance and contact resistance stability of the conventional alloy material. Therefore, if the total amount of at least one of W, V, and Ta is less than 0.5% by weight, the effect of increasing the softening temperature and preventing adhesion cannot be exhibited; %, the amount of oxides generated increases, contact resistance becomes high, and furthermore, it becomes unstable. In addition, by setting the content of Au, Pt, Ag, Cu, and Zn within a range that does not change the composition ratio of the conventional alloy material, the characteristics of the conventional alloy material can be exhibited without being impaired. This is the result. Next, a conventional alloy material is used as a base material, and W is added thereto to obtain a brush sliding contact material having the composition shown in Example 1 in the table. Brush wires with a wire diameter of 0.7 mm were made using sliding contact materials for commercial use and conventional sliding contact materials for brushes, each cut into 8 mm lengths, and two wires were placed in parallel with one end having a width of 10 mm and a length of 10 mm. A brush contact was made by welding it to a base material of 13 mm and 0.2 mm thickness, and curving a 2R arc-shaped contact part on the other end. Then, each brush contact was brought into contact with a disk-shaped commutator, and the commutator was rotated in forward and reverse directions to perform a sliding test under the following test conditions, and the wear amount and contact resistance were measured. The results shown in the column were obtained. Test conditions Current: DC 0.6A Voltage: 12V Load: Resistance load Rotation speed: 1000 rotations/divided speed: 130 to 120m/min Contact force: 100g Test time: 7 hours

【表】上記の表で明らかなように実施例１〜12の刷子
接点は従来例の刷子接点に比し摩耗量が著しく少
なく、接触抵抗が低く安定していることが判る。
これはひとえに実施例１〜12の刷子接点の刷子線
材を構成している本発明の刷子用摺動接点材料
が、Ｗ、Ｖ、Taによつて摺動時の軟化による凝
着を防止して、耐摩耗性、接触抵抗の安定性を向
上するからに他ならない。以上詳記した通り本発明による刷子用摺動接点
材料によれば、従来の刷子用摺動接点材料に比べ
著しく耐摩耗性に優れ、摩耗粉の発生量が極めて
少なく、ノイズの発生が殆んど無く、また従来の
刷子用摺動接点材料による場合よりも低く安定し
た接触抵抗を有する刷子接点を得ることができる
という効果がある。[Table] As is clear from the above table, the brush contacts of Examples 1 to 12 have significantly less wear than the conventional brush contacts, and it can be seen that the contact resistance is low and stable.
This is because the sliding contact material for brushes of the present invention, which constitutes the brush wire of the brush contacts of Examples 1 to 12, prevents adhesion due to softening during sliding due to W, V, and Ta. This is because it improves wear resistance and contact resistance stability. As detailed above, the sliding contact material for brushes according to the present invention has significantly superior wear resistance compared to conventional sliding contact materials for brushes, generates extremely little wear powder, and generates almost no noise. This has the advantage that it is possible to obtain a brush contact having a lower and more stable contact resistance than when using conventional brush contact materials.

Claims

[Claims]

1 Composition ratio: Au70.5-72.5% by weight, Pt7.5-9.5% by weight, Ag3.5-5.5% by weight, Cu13.5-15.5% by weight,
Au-Pt-Ag-Cu-Zn with Zn0.5-1.5 wt% 93~
A sliding contact material for a brush, comprising 99.5% by weight and the balance being at least one of W, V and Ta in a total of 0.5 to 7% by weight.