JP3449869B2 - Collector ring for energizing roll - Google Patents
Collector ring for energizing rollInfo
- Publication number
- JP3449869B2 JP3449869B2 JP23418696A JP23418696A JP3449869B2 JP 3449869 B2 JP3449869 B2 JP 3449869B2 JP 23418696 A JP23418696 A JP 23418696A JP 23418696 A JP23418696 A JP 23418696A JP 3449869 B2 JP3449869 B2 JP 3449869B2
- Authority
- JP
- Japan
- Prior art keywords
- collector ring
- plating layer
- peripheral surface
- copper
- copper plating
- 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
Landscapes
- Electroplating Methods And Accessories (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、通電ロール用コレ
クターリングに関する。さらに詳しくは、電気メッキ設
備などに用いられる通電ロール用コレクターリングに関
する。
【０００２】
【従来の技術】従来、通電ロール用コレクターリングに
は、電気抵抗が小さいことから、鋳造銅からなるコレク
ターリングが用いられている。
【０００３】しかしながら、前記コレクターリングのビ
ッカース硬度は、３５〜５０Ｈｖ程度と低いため、その
外周面が電刷子によって摺擦されたとき、段つき摩耗が
短時間で生じるので、前記コレクターリングは、その寿
命が短いという欠点がある。
【０００４】また、前記コレクターリングの引張り強さ
は、２０ｋｇ／ｃｍ程度と低いため、前記コレクターリ
ングをロール軸に組み込むときに、内径拡大が生じると
いう欠点がある。また、電気錫メッキ工程に用いられて
いる通電ロールは、ボディのクロムメッキが約６カ月間
の周期で捲替えられており、その都度、コレクターリン
グを抜取って再組込みをする関係上、ナットの締付けの
繰返しにより、テーパーの内径の拡大が進行し、リング
の位置ずれを生じ、電刷子との接触外れが発生し、オー
バーヒートトラブルが発生しやすいという欠点がある。
【０００５】
【発明が解決しようとする課題】本発明は、前記従来技
術に鑑みてなされたものであり、通電性を確保しつつ、
電気抵抗が小さく、外周の段つき摩耗を鋳造銅の約１／
３以下に軽減することができ、ロール軸に繰り返して組
み込むときにもその内径の拡大を小さくさせることがで
きる通電ロール用コレクターリングを提供することを目
的とする。
【０００６】
【課題を解決するための手段】本発明は、鋳造銅からな
り、その少なくとも外周面にビッカース硬度が１００Ｈ
ｖ以上の電気銅メッキ層が設けられてなる通電ロール用
コレクターリングに関する。
【０００７】
【発明の実施の形態】本発明の通電ロール用コレクター
リングは、前記したように、鋳造銅からなり、少なくと
も外周面にビッカース硬度が１００Ｈｖ以上の電気銅メ
ッキ層が設けられたものである。
【０００８】本発明は、通電ロール用コレクターリング
の少なくとも外周面にビッカース硬度が１００Ｈｖ以上
の電気銅メッキ層が設けられている点に、１つの大きな
特徴がある。
【０００９】前記電気銅メッキ層をコレクターリングの
少なくとも外周面に設けたばあい、意外なことに、鋳造
銅（ビッカース硬度：３５〜５０Ｈｖ）と対比して、そ
の表面硬度（ビッカース硬度）が約２００％以上も向上
する。このように、前記電気銅メッキ層をコレクターリ
ングの外周面に設けたばあい、その表面硬度（ビッカー
ス硬度）が約２００％以上も向上する理由は、定かでは
ないが、おそらく、鋳造銅においては、該鋳造銅を構成
している銅の結晶構造が粗であるのに対し、電気銅メッ
キ層においては、該電気銅メッキ層を構成している銅の
結晶構造が電子的結合であり密になっていることにもと
づくのではないか、と考えられる。
【００１０】また、前記電気銅メッキ層をコレクターリ
ングの外周面のみならず内周面に設けたばあい、内径部
の引張り強さが約４０％以上も向上し、内径拡大を小さ
くさせることができるというすぐれた効果が奏される。
かかる観点から、前記電気銅メッキ層のビッカース硬度
は、好ましくは１５０Ｈｖ以上、さらに好ましくは２０
０Ｈｖ以上であることが望ましい。
【００１１】さらに、前記電気銅メッキ層は、実質的に
銅で構成されているので、鋳造銅と同様に、低電気抵抗
を有する。
【００１２】前記電気銅メッキ層の厚さは、あまりにも
小さいばあい、コレクターリングに耐摩耗性が充分に付
与されなくなる傾向があるので、３ｍｍ以上とすること
が好ましく、またあまりにも大きいばあいには、コスト
高となる傾向があるので、７．５ｍｍ以下とすることが
好ましい。
【００１３】前記電気銅メッキ層を形成させるために用
いられる電解質の種類は、前記電気銅メッキ層がビッカ
ース硬度１００Ｈｖを有するかぎり任意であり、とくに
限定がない。
【００１４】前記電解質の代表例としては、たとえば硫
酸銅、ピロリン酸銅、ホウフッ化銅、シアン化銅などが
あげられるが、本発明はかかる例示のみに限定されるも
のではない。
【００１５】なお、前記電解質を用いた電解液には、必
要により、形成される電気銅メッキ層の硬度を向上させ
るために、たとえば糖蜜、チオ尿素、チオジアゾールな
どの添加剤を添加してもよい。
【００１６】また、コレクターリングの少なくとも外周
面に電気銅メッキ層を形成させる際の電解メッキ条件に
ついても、とくに限定がない。通常、電解質濃度は、そ
の種類にもよるが、１５０〜２５０ｇ／リットル程度、
電解液の液温は２５〜３５℃、電流密度は７〜１０Ａ／
ｄｍ2程度であればよい。
【００１７】本発明においては、前記電気銅メッキ層
は、コレクターリングの外周面に設けられるが、さらに
コレクターリングの内周面にも設けられていることが好
ましい。このようにコレクターリングの内周面にも電気
銅メッキ層が設けられているばあいには、リング追込用
ナットの締付け力によってテーパー内径が拡大しにくい
ため、軸との位置ずれから生じる電刷子との接触外れま
での寿命を延長させることができるという利点がある。
【００１８】
【実施例】つぎに、本発明の通電ロール用コレクターリ
ングを実施例にもとづいてさらに詳細に説明するが、本
発明はかかる実施例のみに限定されるものではない。
【００１９】実施例１
図１に示される断面形状を有する鋳造銅製のコレクター
リング１を用意した。
【００２０】電解液として、硫酸銅２００ｇ／リット
ル、硫酸３０ｇ／リットル、塩素４０ｍｇ／リットルお
よび光沢剤３ｍｇ／リットルを含有する水溶液を用い
た。
【００２１】前記水溶液中に、前記コレクターリングを
外周面以外はマスキングして浸漬させ、液温３０℃、電
流密度８Ａ／ｄｍ2の条件で電解メッキを行ない、その
外周面に厚さ７．５ｍｍの電気銅メッキ層を形成させ
た。
【００２２】えられた通電ロール用コレクターリングの
性質として、ビッカース硬度、引張り強さおよび耐摩耗
性を以下の方法にしたがって調べた。その結果を表１に
示す。
【００２３】（１）ビッカース硬度
通電ロール用コレクターリングを旋盤および型削盤を用
いて加工し、厚さ１０ｍｍ、２０ｍｍ角の試料を採取
し、０．２ｋｇｆの試験荷重によってビッカース硬度を
ＪＩＳ Ｚ ２２４４に準拠して測定する。
【００２４】（２）引張り強さ
直径１００ｍｍのＣＦＲＰ（炭素繊維）ロールの外周面
に銅メッキを施したのち、形成された銅メッキ層を剥が
し取る方法で厚さ０．１５ｍｍ、幅１０ｍｍの試料を採
取し、ショッパー式１０００ｋｇ引張試験機によって引
張り強さをＪＩＳ Ｃ ２２５０に準拠して測定する。
【００２５】（３）耐摩耗性
通電ロール用コレクターリングを電気亜鉛メッキライン
のメッキコンダクタロールに使用して実機テストを１０
５６時間行ない、マイクロメーターを用いて使用前の直
径と使用後の最小直径を測定して摩耗量を測定する。
【００２６】比較例１
従来のコレクターリングとして、図１に示される断面形
状を有する鋳造銅製のコレクターリングを用意した。
【００２７】前記コレクターリングの性質として、ビッ
カース硬度、引張り強さおよび耐摩耗性を実施例１と同
様にして調べた。その結果を表１に示す。
【００２８】
【表１】
【００２９】表１に示された結果から、実施例１でえら
れたコレクターリングは、硬度が高く、引張り強さが大
きく、耐摩耗性にすぐれ、かつ伸びが小さいものである
ことがわかる。
【００３０】
【発明の効果】本発明の通電ロール用コレクターリング
は、その少なくとも外周面に電気抵抗が小さい電気銅メ
ッキ層が設けられており、また該電気銅メッキ層は、高
硬度を有するので、ロール軸に組み込むときにその内径
の拡大を小さく、接触抵抗を小さくさせることができ、
しかも耐摩耗性にすぐれたものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collector ring for a current-carrying roll. More specifically, the present invention relates to a collector ring for an energizing roll used in an electroplating facility or the like. 2. Description of the Related Art Conventionally, collector rings made of cast copper have been used as collector rings for energizing rolls because of their low electric resistance. [0003] However, since the Vickers hardness of the collector ring is as low as about 35 to 50 Hv, when the outer peripheral surface is rubbed with an electric brush, stepped abrasion occurs in a short time. There is a disadvantage that the life is short. [0004] Further, since the tensile strength of the collector ring is as low as about 20 kg / cm, there is a disadvantage that when the collector ring is incorporated into a roll shaft, the inner diameter increases. In addition, the chrome plating of the body of the current-carrying roll used in the electric tin plating process is re-wound in a cycle of about 6 months. Is repeated, the inner diameter of the taper increases, the position of the ring is displaced, the contact with the electric brush is lost, and the overheating trouble is liable to occur. SUMMARY OF THE INVENTION [0005] The present invention has been made in view of the above-mentioned prior art, and it has been found that the electric conductivity is ensured.
Electric resistance is small, and stepped wear on the outer periphery is about 1 /
An object of the present invention is to provide a collector ring for a current-carrying roll, which can be reduced to 3 or less, and can have a small increase in the inner diameter even when repeatedly assembled on a roll shaft. SUMMARY OF THE INVENTION The present invention comprises a cast copper having a Vickers hardness of at least 100H on its outer peripheral surface.
The present invention relates to a collector ring for a current-carrying roll provided with an electro-copper plating layer of v or more. [0007] As described above, the collector ring for a current-carrying roll of the present invention is made of cast copper and has at least an outer peripheral surface provided with an electrolytic copper plating layer having a Vickers hardness of 100 Hv or more. is there. The present invention has one significant feature in that an electrolytic copper plating layer having a Vickers hardness of 100 Hv or more is provided on at least the outer peripheral surface of a collector ring for a current-carrying roll. When the electrolytic copper plating layer is provided on at least the outer peripheral surface of the collector ring, surprisingly, its surface hardness (Vickers hardness) is lower than that of cast copper (Vickers hardness: 35 to 50 Hv). It is improved by 200% or more. As described above, when the electrolytic copper plating layer is provided on the outer peripheral surface of the collector ring, the reason why the surface hardness (Vickers hardness) is improved by about 200% or more is not clear, but probably, in cast copper, However, while the crystal structure of the copper constituting the cast copper is coarse, the crystal structure of the copper constituting the electric copper plating layer is electronically coupled and dense in the electrolytic copper plating layer. It is thought that it may be based on what has become. When the electrolytic copper plating layer is provided not only on the outer peripheral surface but also on the inner peripheral surface of the collector ring, the tensile strength of the inner diameter portion can be improved by about 40% or more, and the expansion of the inner diameter can be reduced. An excellent effect of being able to play is achieved.
From such a viewpoint, the Vickers hardness of the electrolytic copper plating layer is preferably 150 Hv or more, more preferably 20 Hv or more.
Desirably, it is 0 Hv or more. Further, since the electrolytic copper plating layer is substantially made of copper, it has a low electric resistance like cast copper. When the thickness of the electroplated copper layer is too small, the wear resistance tends not to be sufficiently imparted to the collector ring. Therefore, it is preferable that the thickness be 3 mm or more. Has a tendency to be costly, so it is preferable to set it to 7.5 mm or less. The type of the electrolyte used for forming the electrolytic copper plating layer is arbitrary as long as the electrolytic copper plating layer has a Vickers hardness of 100 Hv, and is not particularly limited. Representative examples of the electrolyte include, for example, copper sulfate, copper pyrophosphate, copper borofluoride, copper cyanide and the like, but the present invention is not limited to these examples. If necessary, additives such as molasses, thiourea, and thiodiazole may be added to the electrolytic solution using the electrolyte, in order to improve the hardness of the formed electroplated copper layer. . The electrolytic plating conditions for forming the electrolytic copper plating layer on at least the outer peripheral surface of the collector ring are not particularly limited. Usually, the electrolyte concentration is about 150 to 250 g / liter, depending on the type,
The electrolyte temperature is 25 to 35 ° C., and the current density is 7 to 10 A /
It may be about dm 2 . In the present invention, the electrolytic copper plating layer is provided on the outer peripheral surface of the collector ring, but is preferably further provided on the inner peripheral surface of the collector ring. When the electrolytic copper plating layer is also provided on the inner peripheral surface of the collector ring as described above, the inner diameter of the taper is difficult to expand due to the tightening force of the nut for adding the ring. There is an advantage that the life until the brush comes out of contact can be extended. Next, the collector ring for a current-carrying roll according to the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Example 1 A collector ring 1 made of cast copper having a sectional shape shown in FIG. 1 was prepared. As the electrolytic solution, an aqueous solution containing 200 g / l of copper sulfate, 30 g / l of sulfuric acid, 40 mg / l of chlorine and 3 mg / l of brightener was used. The collector ring is masked and immersed in the aqueous solution except for the outer peripheral surface, and electrolytic plating is performed at a liquid temperature of 30 ° C. and a current density of 8 A / dm 2 , and the outer peripheral surface has a thickness of 7.5 mm. Was formed. Vickers hardness, tensile strength and abrasion resistance were examined as properties of the obtained collector ring for a current-carrying roll according to the following methods. Table 1 shows the results. (1) Vickers Hardness A collector ring for a current-carrying roll is machined using a lathe and a die cutter, a sample having a thickness of 10 mm and a square of 20 mm is collected, and the Vickers hardness is measured according to JIS Z 2244 under a test load of 0.2 kgf. Measure according to (2) Tensile strength A sample having a thickness of 0.15 mm and a width of 10 mm is obtained by applying copper plating to the outer peripheral surface of a CFRP (carbon fiber) roll having a diameter of 100 mm and peeling off the formed copper plating layer. And tensile strength is measured by a shopper type 1000 kg tensile tester in accordance with JIS C 2250. (3) Wear resistance A collector ring for a current-carrying roll was used for a plating conductor roll of an electrogalvanizing line, and an actual machine test was performed for 10 minutes.
After 56 hours, the wear amount is measured by measuring the diameter before use and the minimum diameter after use using a micrometer. Comparative Example 1 As a conventional collector ring, a collector ring made of cast copper having a sectional shape shown in FIG. 1 was prepared. Vickers hardness, tensile strength and abrasion resistance were examined in the same manner as in Example 1 as properties of the collector ring. Table 1 shows the results. [Table 1] From the results shown in Table 1, it can be seen that the collector ring obtained in Example 1 has high hardness, high tensile strength, excellent wear resistance, and low elongation. According to the collector ring for a current-carrying roll of the present invention, an electrolytic copper plating layer having a small electric resistance is provided on at least the outer peripheral surface, and the electrolytic copper plating layer has a high hardness. , When incorporated in a roll shaft, the expansion of the inside diameter is small, and the contact resistance can be reduced.
Moreover, it has excellent wear resistance.
【図面の簡単な説明】
【図１】実施例１および比較例１で用いられた鋳造銅製
のコレクターリングの断面図である。
【符号の説明】
１ コレクターリングBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a collector ring made of cast copper used in Example 1 and Comparative Example 1. [Explanation of symbols] 1 Collector ring
───────────────────────────────────────────────────── フロントページの続き (72)発明者 川口 隆 兵庫県姫路市広畑区鶴町２−８ 吉川工 業株式会社広畑支店内 (56)参考文献 特開 昭51−138538（ＪＰ，Ａ) 特開 平10−237690（ＪＰ，Ａ) 特開 平７−183073（ＪＰ，Ａ) 特開 平６−235004（ＪＰ，Ａ) 特開 平６−158385（ＪＰ，Ａ) 特開 平６−81073（ＪＰ，Ａ) 特開 平２−217491（ＪＰ，Ａ) 特開 平２−4952（ＪＰ，Ａ) 実開 平１−74271（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) C25D 7/06 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takashi Kawaguchi 2-8 Tsurumachi, Hirohata-ku, Himeji-shi, Hyogo Yoshikawa Industries, Ltd. Hirohata branch (56) References JP-A-51-138538 (JP, A) JP-A-10-237690 (JP, A) JP-A-7-183073 (JP, A) JP-A-6-235004 (JP, A) JP-A-6-158385 (JP, A) JP-A-6-81073 (JP) JP-A-2-217491 (JP, A) JP-A-2-4952 (JP, A) JP-A-1-74271 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB Name) C25D 7/06
Claims (1)
にビッカース硬度が１００Ｈｖ以上の電気銅メッキ層が
設けられてなる通電ロール用コレクターリング。(1) A collector ring for a current-carrying roll, which is made of cast copper and has at least an outer peripheral surface provided with an electrolytic copper plating layer having a Vickers hardness of 100 Hv or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23418696A JP3449869B2 (en) | 1996-09-04 | 1996-09-04 | Collector ring for energizing roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23418696A JP3449869B2 (en) | 1996-09-04 | 1996-09-04 | Collector ring for energizing roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1081996A JPH1081996A (en) | 1998-03-31 |
| JP3449869B2 true JP3449869B2 (en) | 2003-09-22 |
Family
ID=16967033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23418696A Expired - Fee Related JP3449869B2 (en) | 1996-09-04 | 1996-09-04 | Collector ring for energizing roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3449869B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001061795A1 (en) * | 2000-02-18 | 2001-08-23 | Vestas Wind Systems A/S | Electrical machine |
-
1996
- 1996-09-04 JP JP23418696A patent/JP3449869B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1081996A (en) | 1998-03-31 |
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