JPH0344248B2 - - Google Patents
Info
- Publication number
- JPH0344248B2 JPH0344248B2 JP5544483A JP5544483A JPH0344248B2 JP H0344248 B2 JPH0344248 B2 JP H0344248B2 JP 5544483 A JP5544483 A JP 5544483A JP 5544483 A JP5544483 A JP 5544483A JP H0344248 B2 JPH0344248 B2 JP H0344248B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording medium
- scale
- magnetic scale
- layer
- 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
Links
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 229910008329 Si-V Inorganic materials 0.000 claims description 2
- 229910006768 Si—V Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910017061 Fe Co Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000002411 adverse Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
- G01D15/34—Recording surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
本発明は磁気スケールに係る。
従来の磁気スケールは記録媒体の酸化等による
磁気特性の劣化および磁束分布の不均一化を避け
るため、記録媒体上に汚れが付着しないように箱
形の容器で覆つたりしていた。しかしながら湿気
等の影響は避けられず、充分管理された環境で使
用することが必要であつた。
最近、磁気スケールの応用が広がり、悪環境で
磁気特性の劣化が生じない磁気スケールの要請が
強まつている。
本発明の目的は上記欠点を解決し、悪環境でも
記録媒体は酸化することなく、良好な磁気特性を
保持することのできる磁気スケールを提供するも
のである。
本発明は非磁性基体の側面の長手方向に沿つて
形成された溝に記録媒体として磁気的に硬いFe
−Co−Mn−Ｃ−Si−Ｖ系合金の磁性金属線材が
埋込まれている構造の磁気スケールであつて、そ
の表面の前記記録媒体を含む一部あるいは全面に
Znの層が5μｍ以上で10μｍを越えない厚さに形成
されていることを特徴とする。
本発明の要点は、磁気スケールの記録媒体が酸
化し、磁気特性の劣化および磁束分布の不均一が
起ることを防止することにある。従つて耐食性が
優れている金属あるいは合金が用いられなければ
ならないが、その金属あるいは合金が磁性を示す
ものであつては記録媒体がら湧き出る磁束が空間
に分布しなくなるため、非磁性体であることが必
要である。具体的にはZnが望ましい。
Zn層の厚さが5μｍを下回つて形成されると、
耐蝕試験において本発明の磁気スケールの磁性金
属線材箇所に腐食が生じ、10μｍを越えて形成さ
れると、磁気検出感度が弱くなり実用的でなくな
る。従つて、Zn層は5μｍ以上で20μｍを越えない
厚さに限定する。
Zn層の形成は基体にステンレスを使用する場
合は磁気スケール外周面の記録媒体を含む一部あ
るいは全面のどちらでもかまわない。
次に本発明の磁気スケールおよびその製造方法
について実施例によつて説明する。
直径６mm、長さ1000mmのSUS303材の丸棒に巾
0.5mm、深さ0.5mmの溝を一直線に堀つた。その溝
に直径0.5mmの重量比で38.025％Co−19.512％Mn
−0.585％Ｃ−1.366％Si−0.488％Ｖ−残りFeから
成る冷間伸線加工された合金線材を埋込み、スエ
ージ加工を施して直径5.97mmの複合体を450％で
30分間、水素雰囲気中で熱処理した。熱処理され
た複合体は、溝の部分を上方に向けて固定され、
液体冷却しながら精密研削用グラインダーで線材
埋込み面を平面に研削した。埋め込まれた磁性金
属線材は、溝から遊離することなく、良好な磁性
材料の平面が得られた。
上記の方法によつて得られた磁気スケールは第
１表に示すようなメツキ条件で同表に示すような
Zn層厚さになるように耐食性Zn層を形成した。
さらに、この耐食性Zn層を形成した磁気スケー
ルは85℃−100％湿度の環境で試験を行つたとこ
ろ、第２表に示す結果となつた。
The present invention relates to a magnetic scale. In order to avoid deterioration of magnetic properties and non-uniformity of magnetic flux distribution due to oxidation of the recording medium, conventional magnetic scales are covered with a box-shaped container to prevent dirt from adhering to the recording medium. However, the influence of moisture and the like cannot be avoided, and it is necessary to use it in a well-controlled environment. Recently, the applications of magnetic scales have expanded, and the demand for magnetic scales that do not deteriorate in magnetic properties in adverse environments is increasing. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and provide a magnetic scale that can maintain good magnetic properties without oxidizing the recording medium even in adverse environments. The present invention uses magnetically hard Fe as a recording medium in a groove formed along the longitudinal direction of the side surface of a non-magnetic substrate.
- A magnetic scale with a structure in which a magnetic metal wire of a Co-Mn-C-Si-V alloy is embedded, and a part or the entire surface thereof including the recording medium is
It is characterized in that the Zn layer is formed to a thickness of 5 μm or more and not more than 10 μm. The gist of the present invention is to prevent the magnetic scale recording medium from being oxidized, resulting in deterioration of magnetic properties and non-uniform magnetic flux distribution. Therefore, a metal or alloy with excellent corrosion resistance must be used, but if the metal or alloy exhibits magnetism, the magnetic flux gushing out from the recording medium will not be distributed in space, so it must be a non-magnetic material. is necessary. Specifically, Zn is desirable. When the Zn layer is formed with a thickness of less than 5 μm,
In the corrosion resistance test, if corrosion occurs in the magnetic metal wire portion of the magnetic scale of the present invention, and the thickness exceeds 10 μm, the magnetic detection sensitivity becomes weak and the scale becomes impractical. Therefore, the thickness of the Zn layer is limited to 5 μm or more and not more than 20 μm. When stainless steel is used as the substrate, the Zn layer may be formed either on a part of the outer peripheral surface of the magnetic scale including the recording medium, or on the entire surface. Next, the magnetic scale of the present invention and its manufacturing method will be explained by way of examples. A round bar made of SUS303 material with a diameter of 6 mm and a length of 1000 mm.
A trench of 0.5 mm and depth was dug in a straight line. The groove has a diameter of 0.5mm and a weight ratio of 38.025%Co−19.512%Mn.
- 0.585% C - 1.366% Si - 0.488% V - The remaining Fe is embedded in a cold drawn alloy wire and swaged to form a composite with a diameter of 5.97 mm at 450%
Heat treatment was performed in a hydrogen atmosphere for 30 minutes. The heat-treated composite is fixed with the groove portion facing upward;
The wire embedded surface was ground into a flat surface using a precision grinder while cooling with liquid. The embedded magnetic metal wire did not come loose from the groove, and a good flat surface of the magnetic material was obtained. The magnetic scale obtained by the above method is as shown in Table 1 under the plating conditions shown in the same table.
A corrosion-resistant Zn layer was formed to have the same thickness as the Zn layer.
Furthermore, the magnetic scale on which the corrosion-resistant Zn layer was formed was tested in an environment of 85° C. and 100% humidity, and the results shown in Table 2 were obtained.
【表】【table】
【表】
○：記録媒体部が酸化しなかつた。
×：記録媒体部が酸化した。
以上のように、本発明の磁気スケールは磁気ス
ケールの応用範囲が広がり、しかも悪環境での用
途も広がる最近の状況で、その工業的価値が大き
い。[Table] ○: The recording medium portion was not oxidized.
×: The recording medium portion was oxidized.
As described above, the magnetic scale of the present invention has great industrial value under the recent circumstances in which the range of application of magnetic scales is expanding, and moreover, the use in adverse environments is also expanding.
Claims (1)
れた溝に、記録媒体として磁気的に硬いFe−Co
−Mn−Ｃ−Si−Ｖ系合金の磁性金属線材が埋め
込まれている構造の磁気スケールであつて、その
表面の前記記録媒体を含む一部あるいは全面に
Znの層が5μｍ以上で10μｍを越えない厚さに形成
されていることを特徴とする磁気スケール。1 A magnetically hard Fe-Co material is used as a recording medium in a groove formed along the longitudinal direction of the side surface of a non-magnetic substrate.
- A magnetic scale with a structure in which magnetic metal wires of Mn-C-Si-V alloy are embedded, and a part or the entire surface thereof including the recording medium is
A magnetic scale characterized by a Zn layer formed to a thickness of 5 μm or more but not more than 10 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5544483A JPS59180423A (en) | 1983-03-31 | 1983-03-31 | Magnetic scale and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5544483A JPS59180423A (en) | 1983-03-31 | 1983-03-31 | Magnetic scale and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59180423A JPS59180423A (en) | 1984-10-13 |
| JPH0344248B2 true JPH0344248B2 (en) | 1991-07-05 |
Family
ID=12998760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5544483A Granted JPS59180423A (en) | 1983-03-31 | 1983-03-31 | Magnetic scale and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59180423A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004103981A (en) | 2002-09-12 | 2004-04-02 | Sanyo Electric Co Ltd | Method for manufacturing solid electrolytic capacitor and solid electrolytic capacitor manufactured by this method |
-
1983
- 1983-03-31 JP JP5544483A patent/JPS59180423A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59180423A (en) | 1984-10-13 |
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