JP2912518B2 - Sliding contact material - Google Patents
Sliding contact materialInfo
- Publication number
- JP2912518B2 JP2912518B2 JP5069402A JP6940293A JP2912518B2 JP 2912518 B2 JP2912518 B2 JP 2912518B2 JP 5069402 A JP5069402 A JP 5069402A JP 6940293 A JP6940293 A JP 6940293A JP 2912518 B2 JP2912518 B2 JP 2912518B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- sliding
- contact
- sliding contact
- thickness
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/022—Details for dynamo electric machines characterised by the materials used, e.g. ceramics
- H01R39/025—Conductive materials
Description
【０００１】[0001]
【産業上の利用分野】本発明は、摺動材料の改良に係
り、特にマイクロモータ用コンミテータにおける接触不
安定、異常摩耗の防止に好適な摺動材料に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved sliding material, and more particularly to a sliding material suitable for preventing contact instability and abnormal wear in a commutator for a micromotor.
【０００２】[0002]
【従来の技術】従来、マイクロモータ用コンミテータ材
としてはＡｕＡｇ合金／Ａｇ合金／Ｃｕからなる複合材
料等が汎く用いられており、その優れた特性としてＡｕ
Ａｇ合金はＡｇ合金の欠点を補いＡｕＡｇ合金の特性の
発揮即ち化学的安定性と初期接触特性向上、またＡｇ合
金は本来の摺動特性に良好な安定した接触特性を維持、
更にＣｕはその優れた電気伝導性及び省貴金属からのコ
ストダウン等と各々の持味を複合的に発揮しているもの
である。しかるに、近年の多機能化、高性能化の対応の
中、特に接触抵抗が不安定となったり、異常摩耗が発生
したりするケースが出始めている。それらについての原
因を種々検討した結果、対向ブラシとの摺動中にＡｕＡ
ｇ合金の展延性、凝着性、更には活性化により移転、摩
耗を繰り返していることに起因するものと推測されるに
至った。これらのことからＡｇ合金の欠点を補うことが
でき、しかもＡｕＡｇ合金の特性を有した摺動材料即ち
Ａｇ合金の化学的不安定さからくる初期接触特性の悪さ
をカバーしつつＡｇ合金本来の摺動接触特性を有効に発
揮できる摺動材料が望まれていた。2. Description of the Related Art Hitherto, as a commutator material for a micromotor, a composite material of AuAg alloy / Ag alloy / Cu has been widely used.
The Ag alloy compensates for the disadvantages of the Ag alloy and exhibits the characteristics of the AuAg alloy, that is, improves the chemical stability and the initial contact characteristics.
Further, Cu has a combined effect of its excellent electric conductivity, cost reduction from noble metal saving, and the like. However, in recent years, in response to multifunctionalization and high performance, there are cases in which contact resistance becomes unstable or abnormal wear occurs. As a result of various studies on the causes, AuA was observed during sliding with the opposing brush.
It has been presumed that this is due to the repetition of transfer and wear due to the extensibility and adhesiveness of the g alloy, and furthermore, due to activation. From these facts, the disadvantage of the Ag alloy can be compensated for, and the sliding material having the characteristics of the AuAg alloy, that is, the poor initial contact characteristics resulting from the chemical instability of the Ag alloy, is covered while the original sliding of the Ag alloy is covered. A sliding material that can effectively exhibit dynamic contact characteristics has been desired.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記背景及び
知見に基づきなされたもので、接触安定で異常摩耗のす
ることのない良好な摺動接触特性を長期間維持できる摺
動材料を提供しようとするものである。SUMMARY OF THE INVENTION The present invention has been made based on the above background and knowledge, and provides a sliding material which can maintain good sliding contact characteristics for a long period of time without contact stability and abnormal wear. It is assumed that.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決する本発
明の摺動接点材料は、Ａｇ合金の表面層に表面層程Ａｕ
濃度が高く濃度勾配を有してＡｕが拡散していることを
特徴するものである。The sliding contact material of the present invention, which solves the above-mentioned problems, has a structure in which the surface layer of an Ag alloy is Au as thick as the surface layer.
It is characterized in that Au is diffused with a high concentration and a concentration gradient.
【０００５】[0005]
【作用】上記のように構成された本発明の摺動接点材料
においては、Ａｇ合金の表面層はＡｕが拡散しているの
でＡｕの特性が有効に発揮され、Ａｇ合金の化学的不安
定を補い周囲環境からの汚染、吸着、変色を防止し、ま
た対向ブラシとの摺動中の凝着、移転、摩耗が抑制さ
れ、さらに相互拡散による分散強化効果による機械的特
性特に硬さが向上することから、耐摩耗性向上に作用す
るものである。従って接触安定で異常摩耗のすることな
く良好に摺動特性を長期間維持できるものである。ま
た、Ａｕの拡散は表面層程Ａｕ濃度が高くなっているこ
とから従来の複合材料におけるＡｕＡｇ合金／Ａｇ合金
の過渡時の臨界変動もなく、円滑な摺動特性が得られる
ものである。Ａｇ合金はＡｇＣｕ合金、ＡｇＣｄ合金、
ＡｇＣｕＣｄ合金、ＡｇＣｕＮｉ合金、ＡｇＣｄＮｉ合
金等が用いられるがこれらに限るものではない。拡散条
件としては、材質、厚みに応じ適宜温度等拡散条件を設
定するもので、また加熱による方法においても通電加
熱、電気炉加熱、高周波加熱等適宜行うものである。さ
らに、拡散手順においてはＡｕ張り等した後に圧延、熱
処理の繰り返しや温度条件設定により行うが、圧接法に
限らず、スパッタリング、イオンプレーティング等の乾
式めっき及び湿式めっき等による方法等を用いてもい
い。またＡｕ張りに限らずＡｕＡｇ、ＡｕＣｄ等のＡｕ
合金を用いても良い。In the sliding contact material of the present invention constructed as described above, since Au is diffused in the surface layer of the Ag alloy, the characteristics of Au are effectively exhibited, and the chemical instability of the Ag alloy is reduced. Prevents contamination, adsorption and discoloration from surrounding environment, prevents adhesion, transfer and abrasion during sliding with opposing brushes, and improves mechanical properties, especially hardness due to dispersion strengthening effect by mutual diffusion. Therefore, it acts to improve the wear resistance. Therefore, the sliding characteristics can be maintained satisfactorily for a long period of time without contact wear and abnormal wear. In addition, since the diffusion of Au has a higher Au concentration in the surface layer, there is no critical change during transition of the AuAg alloy / Ag alloy in the conventional composite material, and smooth sliding characteristics can be obtained. Ag alloy is AgCu alloy, AgCd alloy,
An AgCuCd alloy, an AgCuNi alloy, an AgCdNi alloy or the like is used, but is not limited thereto. As the diffusion conditions, diffusion conditions such as temperature are appropriately set according to the material and thickness, and a heating method is appropriately performed such as electric heating, electric furnace heating, and high frequency heating. Furthermore, in the diffusion procedure, rolling is performed after Au plating or the like by repeating rolling, heat treatment, or setting of temperature conditions. Good. Also not limited to Au tension, Au such as AuAg, AuCd, etc.
An alloy may be used.
【０００６】[0006]
【実施例】以下に実施例と従来例について述べる。まず
実施例として、材質Ａｕ板厚７μｍ、材質ＡｇＣｄ１％
板厚 0.2mm、材質Ｃｕ板厚 1.5mmを圧接、圧延加工、焼
鈍、熱処理の繰り返しにより圧延加工上り70％にて総厚
0.25mmで表面層程Ａｕ濃度の高いＡｕが厚さ３μｍで拡
散したＡｇＣｄ１％の厚さ30μｍのＡｇＣｄ１％／Ｃｕ
からなる複合摺動材料を得た。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment and a conventional example will be described below. First, as an example, a material Au plate thickness is 7 μm and a material AgCd is 1%.
A total thickness of 70% in the rolling process by repeatedly pressing, rolling, annealing and heat-treating a plate thickness of 0.2mm and a Cu material thickness of 1.5mm
AgCd1% / Cu with a thickness of 30µm / AgCd1% / Cu with a thickness of 0.25mm and Au with a higher Au concentration as the surface layer diffused with a thickness of 3µm
Was obtained.
【０００７】一方、従来例として材質ＡｕＡｇ40％板厚
７μｍ、材質ＡｇＣｄ１％板厚 0.2mm、材質Ｃｕ板厚
1.5mmを圧接、圧延加工、焼鈍の繰り返しにより圧延加
工上り70％にて総厚0.25mmでＡｕＡｇ40％が厚さ１μ
ｍ、ＡｇＣｄ１％が厚さ30μｍのＡｕＡｇ40％／ＡｇＣ
ｄ１％／Ｃｕからなる複合摺動材料を得た。On the other hand, as a conventional example, a material AuAg 40% plate thickness 7 μm, a material AgCd 1% plate thickness 0.2 mm, a material Cu plate thickness
1.5mm of total thickness 0.25mm at thickness of 70% after rolling by repeated pressing, rolling and annealing of 1.5mm, AuAg 40% of thickness 1μ
m, AgCd1%, AuAg40% / AgC with thickness of 30 μm
A composite sliding material composed of d1% / Cu was obtained.
【０００８】然して上記材料を下記の試験条件にて摺動
試験を行い、摩耗量と接触抵抗を求めた処、下記の表１
に示すような結果を得た。 試験条件（対向ブラシ ＡｇＰｄ50％） 電流 ＤＣ 170mA 摺動速度 20mm/sec 荷重 25ｇ テスト時間 333分 3,330分 温度 25℃ 湿度 50％ＲＨA sliding test was performed on the above materials under the following test conditions to determine the wear amount and the contact resistance.
The result as shown in FIG. Test conditions (opposite brush AgPd50%) Current DC 170mA Sliding speed 20mm / sec Load 25g Test time 333 minutes 3,330 minutes Temperature 25 ° C Humidity 50% RH
【０００９】[0009]
【表１】 [Table 1]
【００１０】以上の結果から明らかなように従来例にお
いては接触不安定で摩耗量が多かったのに対して、実施
例においては接触安定で摩耗量の少ない良好な摺動特性
を示した。As is clear from the above results, the conventional example exhibited a stable contact and a small amount of wear, whereas the conventional example exhibited good sliding characteristics with a large amount of wear.
【００１１】[0011]
【発明の効果】以上の結果から本発明の摺動接点材料に
よれば、Ａｇ合金の表面層程Ａｕ濃度の高い濃度勾配を
有したＡｕが拡散してなることから、Ａｇ合金の化学的
不安定さからくる初期接触特性のＡｕの特性を発揮しつ
つＡｇ合金本来の接触安定性で耐摩耗性の良好な摺動接
触特性を安定して維持できるという優れた効果を有する
ものである。なお、本発明は、マイクロモータ用コンミ
テータ材に限らず、マイクロモータ用ブラシ材、スリッ
プリング材、コネクタ材等摺動接点材料全般に有効なも
のである。また、本発明はＡｇ合金にＡｕを拡散させた
摺動接点材料であるが、Ａｇ合金に限らずＰｄ合金、Ｃ
ｕ合金等においても有効なものである。According to the above results, according to the sliding contact material of the present invention, Au having a higher concentration gradient of Au is diffused toward the surface layer of the Ag alloy. The alloy has an excellent effect that it can stably maintain the sliding contact characteristics with good wear resistance and the inherent contact stability of the Ag alloy while exhibiting the Au characteristics of the initial contact characteristics resulting from the stability. The present invention is not limited to commutator materials for micromotors, but is effective for all sliding contact materials such as brush materials for micromotors, slip ring materials, and connector materials. Further, the present invention is a sliding contact material in which Au is diffused in an Ag alloy.
It is also effective for u alloys and the like.
Claims (1)
勾配を有してＡｕが拡散していることを特徴とする摺動
接点材料1. A sliding contact material characterized in that the Au concentration is higher in the surface layer of the Ag alloy and the Au is diffused with a concentration gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5069402A JP2912518B2 (en) | 1993-03-04 | 1993-03-04 | Sliding contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5069402A JP2912518B2 (en) | 1993-03-04 | 1993-03-04 | Sliding contact material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06260255A JPH06260255A (en) | 1994-09-16 |
| JP2912518B2 true JP2912518B2 (en) | 1999-06-28 |
Family
ID=13401580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5069402A Expired - Fee Related JP2912518B2 (en) | 1993-03-04 | 1993-03-04 | Sliding contact material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2912518B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2895793B2 (en) * | 1995-02-24 | 1999-05-24 | マブチモーター株式会社 | Sliding contact material, clad composite material, commutator made of the same, and small DC motor using the commutator |
-
1993
- 1993-03-04 JP JP5069402A patent/JP2912518B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06260255A (en) | 1994-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |