JP3090009B2 - Electrode wire for electric discharge machining - Google Patents
Electrode wire for electric discharge machiningInfo
- Publication number
- JP3090009B2 JP3090009B2 JP07312290A JP31229095A JP3090009B2 JP 3090009 B2 JP3090009 B2 JP 3090009B2 JP 07312290 A JP07312290 A JP 07312290A JP 31229095 A JP31229095 A JP 31229095A JP 3090009 B2 JP3090009 B2 JP 3090009B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- electrode wire
- discharge machining
- layer
- tensile strength
- 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
- 238000003754 machining Methods 0.000 title description 28
- 239000002131 composite material Substances 0.000 claims description 50
- 229910045601 alloy Inorganic materials 0.000 claims description 15
- 239000000956 alloy Substances 0.000 claims description 15
- 239000011162 core material Substances 0.000 claims description 15
- 229910017518 Cu Zn Inorganic materials 0.000 claims description 11
- 229910017752 Cu-Zn Inorganic materials 0.000 claims description 11
- 229910017943 Cu—Zn Inorganic materials 0.000 claims description 11
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims description 11
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 10
- 229910001257 Nb alloy Inorganic materials 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000009760 electrical discharge machining Methods 0.000 claims 3
- 239000010949 copper Substances 0.000 description 34
- 239000006185 dispersion Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 13
- 239000011701 zinc Substances 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ワイヤ放電加工に
用いられる放電加工用電極線、特に、最外層にＣｕ−Ｚ
ｎ合金層を設けた構成の放電加工用電極線に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode wire for electric discharge machining used for wire electric discharge machining, and in particular, to a Cu-Z
The present invention relates to an electrode wire for electric discharge machining having a structure provided with an n alloy layer.
【０００２】[0002]
【従来の技術】ワイヤ放電加工は、電極線となる細いワ
イヤ（タングステン、黄銅等）を巻き取りつつ被加工物
に対して三次元の送りをかけ、ワイヤを電極にして被加
工物に放電を行いながら被加工物を溶断して糸鋸式の加
工を行うもので、特定形状の電極を使用しないで高精度
に三次元形状の製品を作成することができる。特に、加
工の困難な超硬合金等の加工も高精度に行えるため、近
年、実用範囲が広がりつつあり、例えば、機械的な切削
や切断加工が困難な金型等の加工にも用いられている。2. Description of the Related Art In wire electric discharge machining, a thin wire (tungsten, brass, etc.) serving as an electrode wire is wound up and three-dimensionally fed to a workpiece, and the wire is used as an electrode to discharge the workpiece. The process is performed by fusing the workpiece while performing a saw-tooth sawing process, and a three-dimensional product can be produced with high accuracy without using an electrode of a specific shape. Particularly, machining of hard metal and the like which are difficult to machine can be performed with high precision. Therefore, in recent years, the practical range is expanding, and for example, it is also used for machining of a mold or the like in which mechanical cutting or cutting is difficult. I have.
【０００３】最近の金型加工分野においては、より高精
度化、高速度化の要求が高く、直径０．１ｍｍ以下で１
５０ｋｇｆ／ｍｍ2 以上の高引張強度、２０％ＩＡＣＳ
以上の高導電率特性を有する極細電極線の出現が待たれ
ている。[0003] In the recent mold processing field, there is a high demand for higher precision and higher speed.
High tensile strength of 50 kgf / mm 2 or more, 20% IACS
The appearance of ultrafine electrode wires having the above-described high conductivity characteristics is expected.
【０００４】この種の要求を満たす電極線として、従来
より引張強度の高いＷ（タングステン）単体の電極線が
用いられている。従来、高張力電極線として用いられて
いるＷ電極線の引張強度は約４００ｋｇｆ／ｍｍ2 であ
り、この値は汎用黄銅電極線の約４倍の強度を有するた
め、高精度化のために線径を０．１ｍｍ以下に極細化し
ても加工精度を低下させる原因となる電極線の振動を防
止するに十分な張力を負荷することができる。As an electrode wire that satisfies this kind of demand, a single electrode wire of W (tungsten) having a higher tensile strength than before has been used. Conventionally, the tensile strength of a W electrode wire used as a high-tensile electrode wire is about 400 kgf / mm 2, which is about four times the strength of a general-purpose brass electrode wire. Even if the diameter is reduced to 0.1 mm or less, a sufficient tension can be applied to prevent the electrode wire from vibrating, which causes a reduction in processing accuracy.
【０００５】しかし、タングステンは希少金属の１つで
あり、また、難加工材でもある。このため、極細電極線
が消耗品であることを考えると非常に高価なものにな
る。また、Ｗ電極線を用いた場合、強度が高くなりす
ぎ、電極線に電圧を印加する送り出しリール及び巻き取
りリールの磨耗が激しく、接触抵抗の変化等により不安
定な放電現象が生じ易い。[0005] However, tungsten is one of the rare metals and is also a difficult-to-process material. For this reason, considering that the ultrafine electrode wire is a consumable item, it becomes very expensive. Further, when the W electrode wire is used, the strength becomes too high, the sending reel and the take-up reel for applying a voltage to the electrode wire are greatly worn, and an unstable discharge phenomenon is likely to occur due to a change in contact resistance and the like.
【０００６】そこで、最近では、汎用電極線である黄銅
（Ｃｕ−３５％Ｚｎ）電極線とＷ電極線の中間の引張強
さを有する複合電極線が用いられている。この複合電極
線の詳細については、例えば、特開昭５６−１２６５２
８号公報に記載があり、その構造は図４に示す如くであ
る。すなわち、コア部としての高張力鋼線２０１に対
し、同軸にＣｕ−Ｚｎ（黄銅）合金層２０２を被覆した
構成である。Therefore, recently, a composite electrode wire having a tensile strength intermediate between that of a brass (Cu-35% Zn) electrode wire and a W electrode wire, which are general-purpose electrode wires, has been used. For details of this composite electrode wire, see, for example, Japanese Patent Application Laid-Open No. 56-12652.
There is described in 8 JP, its structure is as shown in FIG. That is, the structure is such that a Cu—Zn (brass) alloy layer 202 is coaxially coated on a high-tensile steel wire 201 as a core.
【０００７】このような構成により、高精度加工に十分
で、送り出しリール及び巻き取りリールとの磨耗が少な
い適度な引張強度である約１５０〜２００ｋｇｆ／ｍｍ
2 の値が得られ、しかも安価に製造することができる。[0007] With such a configuration, a tensile strength of about 150 to 200 kgf / mm, which is sufficient for high-precision machining and has a moderate tensile strength with little abrasion on the feed reel and the take-up reel.
A value of 2 is obtained, and it can be manufactured at low cost.
【０００８】[0008]
【発明が解決しようとする課題】しかし、従来の放電加
工用電極線によると、構成材に引張強度の低いＣｕ−Ｚ
ｎ合金を被覆に用いているため、複合電極線としての引
張強度を確保するには、複合電極線のテンションメンバ
ーであるコア部の高抗張力鋼の割合を大きくしなければ
ならない。However, according to the conventional electrode wire for electric discharge machining, the constituent material has a low tensile strength of Cu-Z.
Since the n-alloy is used for coating, in order to secure the tensile strength of the composite electrode wire, the proportion of the high tensile strength steel in the core, which is the tension member of the composite electrode wire, must be increased.
【０００９】また、高抗張力鋼の導電率はせいぜい１０
％ＩＡＣＳ程度であり、複合電極線としての導電率が低
下し、放電加工電流（放電加工の高速化に不可欠であ
る）を高くすることが難しいという問題がある。Further, the electrical conductivity of high tensile strength steel is at most 10
% IACS, there is a problem that the electrical conductivity of the composite electrode wire is reduced, and it is difficult to increase the electric discharge machining current (indispensable for speeding up electric discharge machining).
【００１０】そこで本発明は、高引張強度及び高導電率
の両特性を備え、放電加工の高精度化及び高速度化を達
成することのできる放電加工用電極線を提供することを
目的としている。Accordingly, an object of the present invention is to provide an electrode wire for electric discharge machining, which has both characteristics of high tensile strength and high electric conductivity and can achieve high precision and high speed of electric discharge machining. .
【００１１】[0011]
【課題を解決するための手段】上記の目的を達成するた
めに、この発明は、焼鈍状態で１０ｋｇｆ／ｍｍ2 以上
の常温引張強さを有する金属からなる芯材と、この芯材
に対し同軸に形成されるＮｂ又はＮｂ合金とＣｕ（銅）
又はＣｕ合金の２相による分散強化型複合体層と、この
分散強化型複合体層の直上に被覆されるＺｎ又はＣｕ−
Ｚｎ（亜鉛）合金層とを備えた構成にしている。In order to achieve the above object, the present invention relates to a core material made of a metal having a room temperature tensile strength of 10 kgf / mm 2 or more in an annealed state, and a coaxial material with respect to the core material. Or Nb alloy formed on Cu and Cu (copper)
Or a dispersion strengthened composite layer according to the two-phase Cu alloy, Zn or coated directly on the dispersion strengthened composite layer Cu-
And a Zn (zinc) alloy layer.
【００１２】複合材の塑性加工では、各構成材間の変形
抵抗の差が大きすぎるとネッキング現象と称される塑性
不安定現象が発生し、断線等のトラブルが起こりやすく
なる。この発明では、Ｎｂ／Ｃｕ分散強化型複合体の強
度、即ち、変形抵抗が高くなるため、塑性不安定現象の
発生を防止するためには変形抵抗の高い材料を芯材とし
て用いる必要がある。焼鈍状態で１０ｋｇｆ／ｍｍ2 以
上の常温引張強さを有する金属であれば、常温での減面
加工により歪硬化し、その結果、塑性不安定現象の発生
を防止でき、良好な減面加工性を維持できる。In the plastic working of a composite material, if the difference in deformation resistance between the constituent materials is too large, a plastic instability phenomenon called a necking phenomenon occurs, and a trouble such as disconnection tends to occur. In the present invention, since the strength of the Nb / Cu dispersion strengthened composite, that is, the deformation resistance increases, it is necessary to use a material having a high deformation resistance as a core material in order to prevent the occurrence of the plastic instability phenomenon. If the metal has an ordinary-temperature tensile strength of 10 kgf / mm 2 or more in the annealed state, the metal is strain hardened by surface reduction at room temperature, and as a result, the occurrence of a plastic instability phenomenon can be prevented, and good surface reduction workability is obtained. Can be maintained.
【００１３】また、上記構成によれば、Ｎｂ（又はＮｂ
合金）とＣｕ（又はＣｕ合金）による２相分散強化型複
合体は分散組織を有し、この分散組織においては複合則
が通用せず、大きな引張強度を有するようになる。ま
た、Ｃｕ（又はＣｕ合金）は分散組織になっても存在
し、分散強化型複合体層は高導電率を備えている。した
がって、最外層にＺｎ又はＣｕ−Ｚｎ合金層を配して
も、高引張強度及び高導電率の特性を備えた放電加工用
電極線を得ることができ、放電加工の高精度化及び高速
度化が低価格で実現することができる。According to the above configuration, Nb (or Nb
Alloy) and Cu (or Cu alloy) have a dispersed structure. In this dispersed structure, the composite rule cannot be applied, and a large tensile strength is obtained. Further, Cu (or Cu alloy) exists even in a dispersed structure, and the dispersion-strengthened composite layer has high conductivity. Therefore, even if a Zn or Cu-Zn alloy layer is provided as the outermost layer, an electrode wire for electric discharge machining having high tensile strength and high electrical conductivity can be obtained, and high accuracy and high speed of electric discharge machining can be obtained. Can be realized at a low price.
【００１４】ここで、前記芯材の体積率は３０％以下、
前記分散強化型複合体層は体積率が３０％以上、及び前
記Ｚｎ又はＣｕ−Ｚｎ合金層は体積率が６５％以下にす
ることが望ましい。Here, the volume ratio of the core material is 30% or less,
The volume ratio of the dispersion strengthened composite layer is preferably 30% or more, and the volume ratio of the Zn or Cu—Zn alloy layer is preferably 65% or less.
【００１５】この構成によれば、電極線の体積率を最適
に設定したことにより、放電加工用電極線として用いる
線径にあって所望の引張強度及び導電率が得られる。According to this configuration, by setting the volume ratio of the electrode wire optimally, desired tensile strength and electrical conductivity can be obtained in the wire diameter used as the electrode wire for electric discharge machining.
【００１６】そして、前記分散強化型複合体層は、Ｎｂ
又はＮｂ合金によるシートとＣｕ又はＣｕ合金によるシ
ートとを積層状態に密巻きにして積層複合体とし、前記
積層複合体を減面加工して、分散組織を形成した構成に
することができる。The dispersion-strengthened composite layer is made of Nb
Alternatively, a structure in which a sheet made of an Nb alloy and a sheet made of Cu or a Cu alloy are closely wound in a laminated state to form a laminated composite, and the laminated composite is subjected to surface reduction processing to form a dispersed structure.
【００１７】この構成によれば、Ｎｂ（又はＮｂ合金）
によるシートとＣｕ（又はＣｕ合金）によるシートとを
積層状態に密巻きにした複合体に対し、減面加工を施す
ことによりＣｕ（又はＣｕ合金）が分散相となって分散
組織が形成され、引張強度が高くなる。したがって、最
外層にＺｎ又はＣｕ−Ｚｎ合金層を配しても、高引張強
度及び高導電率の特性を備えた放電加工用電極線を得る
ことができる。According to this structure, Nb (or Nb alloy)
By subjecting the composite in which the sheet according to the above and the sheet made of Cu (or Cu alloy) are closely wound in a laminated state to a surface reduction process, Cu (or Cu alloy) becomes a dispersed phase to form a dispersed structure, Increases tensile strength. Therefore, even if a Zn or Cu-Zn alloy layer is provided as the outermost layer, an electrode wire for electric discharge machining having high tensile strength and high electrical conductivity can be obtained.
【００１８】[0018]
【発明の実施の形態】図１は本発明による放電加工用電
極線の第１の実施の形態を示す断面図である。FIG. 1 is a sectional view showing a first embodiment of an electrode wire for electric discharge machining according to the present invention.
【００１９】本発明による放電加工用電極線１００は、
芯材としてＮｂ（又はＮｂ合金）線１０１が用いられ、
このＮｂ線１０１の外周には同軸にＮｂ（又はＮｂ合
金）／Ｃｕ（又はＣｕ合金）２相分散強化型複合体層１
０２が設けられている。更に、Ｎｂ／Ｃｕ２相分散強化
型複合体層１０２には、Ｃｕ−Ｚｎ合金層１０３が被覆
されている。芯材としては、Ｎｂ（又はＮｂ合金）線に
替えて炭素鋼等による高抗張力材を用いることができ
る。 The electrode wire 100 for electric discharge machining according to the present invention comprises:
Nb (or Nb alloy) wire 101 is used as a core material,
The Nb (or Nb alloy) / Cu (or Cu alloy) two-phase dispersion strengthened composite layer 1 is coaxially formed on the outer periphery of the Nb wire 101.
02 is provided. Further, the Nb / Cu two-phase dispersion strengthened composite layer 102 is covered with a Cu-Zn alloy layer 103. As core material, Nb (or Nb alloy) wire
Instead, a high tensile strength material such as carbon steel can be used.
You.
【００２０】Ｎｂ／Ｃｕ２相分散強化型複合体層１０２
は、ＮｂとＣｕのシート材を積層及び密巻きして作られ
た複合体であり、高引張強度と高導電率を兼ね備えてい
る。このＮｂ／Ｃｕ２相分散強化型複合体層１０２に対
し、Ｎｂ線１０１はＣｕよりも強度が大きい芯材として
機能するものである。Nb / Cu two-phase dispersion strengthened composite layer 102
Is a composite formed by laminating and closely winding Nb and Cu sheet materials, and has both high tensile strength and high electrical conductivity. In the Nb / Cu two-phase dispersion strengthened composite layer 102, the Nb wire 101 functions as a core material having higher strength than Cu.
【００２１】最外層のＣｕ−Ｚｎ合金層１０３は放電加
工性を支配する重要な部分である。そこで、放電加工特
性の良好なＺｎをＣｕに添加（Ｚｎ＝１０〜５０ｗｔ
％）したＣｕ−Ｚｎ合金を用いている。The Cu—Zn alloy layer 103 as the outermost layer is an important part that governs electric discharge machining. Therefore, Zn having good electric discharge machining characteristics is added to Cu (Zn = 10 to 50 wt.
%) Is used.
【００２２】ここで、上記の積層複合体が高引張強度特
性を有するＮｂ／Ｃｕ２相分散強化型複合体に変化する
様子について説明する。Here, a description will be given of how the above-mentioned laminated composite changes to a Nb / Cu two-phase dispersion strengthened composite having high tensile strength characteristics.
【００２３】Ｎｂシート材１０２ａとＣｕシート材１０
２ｂを積層し、図２の（ａ）に示すように複合体に加工
した後、減面加工を施すと図２の（ｂ）の様に皺状に変
形したＮｂ層１０２ｃとＣｕ層１０２ｄが形成され、組
織が層状から崩れていく。そして、最終的には、図２の
（ｃ）の様に、片方の層が分散相になった分散組織に変
化する。ここでは、Ｃｕ層１０２ｄが分散相１０２ｆに
なり、Ｎｂ層１０２ｃがＮｂ相１０２ｅになる。Nb sheet material 102a and Cu sheet material 10
2b, and processed into a composite as shown in FIG. 2 (a), and then subjected to surface reduction processing, the wrinkled Nb layer 102c and Cu layer 102d as shown in FIG. 2 (b) are formed. It is formed and the tissue collapses from stratified. Then, finally, as shown in FIG. 2C, the layer changes to a dispersed structure in which one layer has become a dispersed phase. Here, the Cu layer 102d becomes the dispersed phase 102f, and the Nb layer 102c becomes the Nb phase 102e.
【００２４】層状組織が崩れない領域では、複合則が成
立し、積層複合体自体の引張強度が低く、複合電極線の
強度メンバーとして適用することは困難である。これに
対し、層状組織が崩れ、分散組織になるにしたがってＮ
ｂ／Ｃｕ複合体の引張強度は複合則が適用できなくな
り、最大、約２５０ｋｇｆ／ｍｍ2 に達する引張強度が
得られるようになる。この結果、複合電極線の強度メン
バーとして適用可能な複合体を得ることができる。そし
て、このＮｂ／Ｃｕ複合体においては、分散組織になっ
ても高導電率のＣｕが存在することにより、Ｎｂ／Ｃｕ
２相分散強化型複合体層１０２は高い導電率特性を備え
ることになる。In a region where the layered structure does not collapse, the composite rule is satisfied, the tensile strength of the laminated composite itself is low, and it is difficult to apply as a strength member of the composite electrode wire. On the other hand, as the layered structure collapses and becomes a dispersed structure, N
The composite rule cannot be applied to the tensile strength of the b / Cu composite, and a tensile strength of up to about 250 kgf / mm 2 can be obtained. As a result, a composite applicable as a strength member of the composite electrode wire can be obtained. In the Nb / Cu composite, the presence of Cu with high conductivity even in a dispersed structure results in Nb / Cu
The two-phase dispersion strengthened composite layer 102 will have high conductivity properties.
【００２５】[0025]
【実施例】本発明者らは、図１の構成による放電加工用
電極線を製作した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventors manufactured an electrode wire for electric discharge machining having the structure shown in FIG .
【００２６】製作に際しては、実施例１，２（図１の構
成による）の２例について、図６に示す条件で行った。
すなわち、線径（ｍｍ）及び体積率（％）を適宜変え、
各々における引張強度（ｋｇｆ／ｍｍ2 ）と導電率（％
ＩＡＣＳ）を測定した。また、１つの比較例（図７に示
した従来技術によるもの）を従来技術により製作した。
なお、図６の体積率の欄における「Ｃｕ−Ｚｎ」は図１
のＣｕ−Ｚｎ合金層１０３に相当し、「Ｎｂ／Ｃｕ」は
Ｎｂ／Ｃｕ２相分散強化型複合体層１０２に相当し、
「Ｎｂ」はＮｂ線１０１に相当する。In the manufacture, two examples of Examples 1 and 2 (according to the configuration of FIG. 1) were performed under the conditions shown in FIG.
That is, the wire diameter (mm) and the volume ratio (%) are appropriately changed,
Tensile strength (kgf / mm 2 ) and conductivity (%
IACS) was measured. Further, one comparative example (according to the prior art shown in FIG. 7) was manufactured by the prior art.
Note that “Cu—Zn” in the column of volume ratio in FIG.
“Nb / Cu” corresponds to the Nb / Cu two-phase dispersion strengthened composite layer 102,
“Nb” corresponds to the Nb line 101.
【００２７】そして、Ｃｕ−Ｚｎ合金層１０３には実施
例１，２及び比較例共に、Ｃｕ−３５ｗｔ％Ｚｎ合金
（ＪＩＳ Ｃ２７００）を用いた。また、Ｎｂ／Ｃｕ２
相分散強化型複合体層１０２には、厚さ０．２ｍｍの工
業用純Ｎｂシートと厚さ０．１２ｍｍの工業用純銅シー
トを密巻きにした積層複合体を母材に用いて形成した。
更に、Ｎｂ線１０１には工業用純Ｎｂ材を使用した。そ
して、比較例の芯材には０．２５ｗｔ％炭素を含有した
炭素鋼を用いた。[0027] Then, performed is the Cu-Zn alloy layer 103
A Cu-35 wt% Zn alloy (JIS C2700) was used in each of Examples 1 and 2 and Comparative Example. In addition, Nb / Cu2
The phase dispersion strengthened composite layer 102 was formed using a laminated composite in which a 0.2 mm-thick industrial pure Nb sheet and a 0.12 mm-thick industrial pure copper sheet were tightly wound as a base material.
Further, an industrial pure Nb material was used for the Nb wire 101. Then, carbon steel containing 0.25 wt% carbon was used as the core material of the comparative example.
【００２８】図３から明らかなように、本発明による実
施例１，２は、いずれも引張強度が１６２ｋｇｆ／ｍｍ
2 以上で且つ２０％ＩＡＣＳ以上の導電率が得られてい
る。これに対して比較例は、引張強度は十分な値が得ら
れるものの、コア部が導電率の低い炭素鋼であるため、
十分な導電率を得ることができない。[0028] As apparent from FIG. 3, real according to the invention
In Examples 1 and 2 , the tensile strength was 162 kgf / mm.
Conductivity of 2 or more and 20% IACS or more is obtained. On the other hand, in the comparative example, although a sufficient value is obtained in the tensile strength, the core portion is a carbon steel having low conductivity,
Sufficient conductivity cannot be obtained.
【００２９】以上の実施例から、複合則によりＮｂ／Ｃ
ｕ２相分散強化型複合体層１０２の引張強度を逆算する
と、最大約２５０ｋｇｆ／ｍｍ2 になる。したがって、
引張強度が最大でも約１００ｋｇｆ／ｍｍ2 のＣｕ−Ｚ
ｎ合金と複合する場合、Ｎｂ／Ｃｕ２相分散強化型複合
体層１０２の体積率は少なくとも３５％以上でなけれ
ば、放電加工の高精度及び高速化に必要な特性を得られ
ないことがわかる。From the above examples, it was found that Nb / C
Back calculation of the tensile strength of the u-phase dispersion strengthened composite layer 102 results in a maximum of about 250 kgf / mm 2 . Therefore,
Cu-Z with a tensile strength of at most about 100 kgf / mm 2
It can be seen that in the case of compounding with an n alloy, the characteristics required for high precision and high speed of electric discharge machining cannot be obtained unless the volume ratio of the Nb / Cu two-phase dispersion strengthened composite layer 102 is at least 35% or more.
【００３０】なお、本発明においては、Ｎｂ／Ｃｕ２相
分散強化型複合体層１０２を製作するに際し、Ｎｂシー
トとＣｕシートを積層して巻き寿司形に巻き取るように
したが、これに限定されるものではない。例えば、単純
に積み上げた積層複合体から形成されるＮｂ／Ｃｕ２相
分散強化型複合体層にしてもよい。In the present invention, when fabricating the Nb / Cu two-phase dispersion strengthened composite layer 102, the Nb sheet and the Cu sheet are laminated and wound into a rolled sushi shape. However, the present invention is not limited to this. Not something. For example, an Nb / Cu two-phase dispersion-strengthened composite layer formed from a stacked composite simply stacked may be used.
【００３１】[0031]
【発明の効果】以上より明らかな如く、本発明によれ
ば、Ｎｂ（又はＮｂ合金）とＣｕ（又はＣｕ合金）の２
相による分散強化型複合体層を、焼鈍状態で１０ｋｇｆ
／ｍｍ 2 以上の常温引張強さを有する金属からなる芯材
に対し同軸に形成したので、最外層にＣｕ−Ｚｎ合金層
を配しても、高引張強度及び高導電率の特性を備えた放
電加工用電極線を得ることができ、放電加工の高精度化
及び高速度化を低価格に実現することができる。As is clear from the above, according to the present invention, two types of Nb (or Nb alloy) and Cu (or Cu alloy) are used.
10 kgf in the annealed state
/ Mm 2 or more, since it was formed coaxially with a core material made of a metal having a room temperature tensile strength , even if a Cu—Zn alloy layer was provided as the outermost layer, it had characteristics of high tensile strength and high electrical conductivity. An electrode wire for electric discharge machining can be obtained, and high precision and high speed electric discharge machining can be realized at low cost.
【図１】本発明による放電加工用電極線の第１の実施の
形態を示す断面図である。FIG. 1 is a sectional view showing a first embodiment of an electrode wire for electric discharge machining according to the present invention.
【図２】積層複合体がＮｂ／Ｃｕ２相分散強化型複合体
に変化する様子を示す説明図である。FIG. 2 is an explanatory view showing a state in which a laminated composite changes to an Nb / Cu two-phase dispersion strengthened composite.
【図３】本発明の実施結果及び構成条件を示す説明図で
ある。 FIG. 3 is an explanatory diagram showing an implementation result and configuration conditions of the present invention.
is there.
【図４】従来の放電加工用電極線の構成を示す断面図で
ある。 FIG. 4 is a sectional view showing a configuration of a conventional electrode wire for electric discharge machining.
is there.
【符号の説明】１００ 放電加工用電極線 １０１ Ｎｂ線 １０２ Ｎｂ／Ｃｕ２相分散強化型複合体層 １０２ｆ 分散相 １０２ｅ Ｎｂ相 １０３ Ｃｕ−Ｚｎ合金層[Description of Signs] 100 Electrode wire for electric discharge machining 101 Nb wire 102 Nb / Cu two-phase dispersion strengthened composite layer 102 f Disperse phase 102 e Nb phase 103 Cu-Zn alloy layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 木村 守男 茨城県土浦市木田余町3550番地 日立電 線株式会社 システムマテリアル研究所 内 (72)発明者 中川 和彦 茨城県土浦市木田余町3550番地 日立電 線株式会社 システムマテリアル研究所 内 (72)発明者 山中 務 茨城県土浦市木田余町3550番地 日立電 線株式会社 システムマテリアル研究所 内 (72)発明者 木村 孝光 茨城県日立市川尻町４丁目10番１号 日 立電線株式会社 豊浦工場内 (56)参考文献 特開 平９−150323（ＪＰ，Ａ) 特開 平９−57585（ＪＰ，Ａ) 特開 平７−156021（ＪＰ，Ａ) 特開 平６−238523（ＪＰ，Ａ) 特開 昭60−29235（ＪＰ，Ａ) 特開 昭63−221925（ＪＰ，Ａ) 特表 平３−501101（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23H 1/00 - 7/24 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Morio Kimura 3550 Kida Yomachi, Tsuchiura City, Ibaraki Prefecture Within Hitachi Systems, Ltd.System Materials Research Laboratories (72) Kazuhiko Nakagawa 3550 Kida Yomachi, Tsuchiura City, Ibaraki Hitachi (72) Inventor, Tsukasa Yamanaka 3550, Kida Yomachi, Tsuchiura-shi, Ibaraki Hitachi Cable, Ltd. System Materials Laboratory (72) Inventor, Takamitsu Kimura 4-chome, Kawajiri-cho, Hitachi, Ibaraki No. 10 No. 1 in the Toyoura Plant of Hitachi Cable Co., Ltd. (56) References JP-A-9-150323 (JP, A) JP-A-9-57585 (JP, A) JP-A 7-156021 (JP, A) JP-A-6-238523 (JP, A) JP-A-60-29235 (JP, A) JP-A-63-221925 (JP, A) JP-A-3-501101 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) B23H 1/00-7/24
Claims (3)
引張強さを有する金属からなる芯材と、 前記芯材に対し同軸に形成されるＮｂ又はＮｂ合金とＣ
ｕ又はＣｕ合金の２相による分散強化型複合体層と、 前記分散強化型複合体層の直上に被覆されるＺｎ又はＣ
ｕ−Ｚｎ合金層とを具備することを特徴とする放電加工
用電極線。1. A core material made of a metal having a room temperature tensile strength of 10 kgf / mm 2 or more in an annealed state, and Nb or an Nb alloy formed coaxially with said core material and C
a dispersion-reinforced composite layer of two phases of u or Cu alloy; and Zn or C coated directly on the dispersion-reinforced composite layer.
An electrode wire for electrical discharge machining comprising a u-Zn alloy layer.
強化型複合体層の体積率が３５％以上、及び前記Ｚｎ又
はＣｕ−Ｚｎ合金層は体積率が６５％以下であることを
特徴とする請求項１記載の放電加工用電極線。2. The core material has a volume ratio of 30% or less, the dispersion-reinforced composite layer has a volume ratio of 35% or more, and the Zn or Cu—Zn alloy layer has a volume ratio of 65% or less. The electrode wire for electrical discharge machining according to claim 1, wherein:
合金によるシートとＣｕ又はＣｕ合金によるシートとを
積層状態に密巻きにして積層複合体とし、前記積層複合
体を減面加工して、分散組織を形成した構成であること
を特徴とする請求項１記載の放電加工用電極線。3. The dispersion-reinforced composite layer is made of Nb or Nb.
A sheet in which a sheet made of an alloy and a sheet made of Cu or a Cu alloy are closely wound in a laminated state to form a laminated composite, and the laminated composite is reduced in surface area to form a dispersed structure. 2. The electrode wire for electrical discharge machining according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07312290A JP3090009B2 (en) | 1995-11-30 | 1995-11-30 | Electrode wire for electric discharge machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07312290A JP3090009B2 (en) | 1995-11-30 | 1995-11-30 | Electrode wire for electric discharge machining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09150319A JPH09150319A (en) | 1997-06-10 |
| JP3090009B2 true JP3090009B2 (en) | 2000-09-18 |
Family
ID=18027476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07312290A Expired - Fee Related JP3090009B2 (en) | 1995-11-30 | 1995-11-30 | Electrode wire for electric discharge machining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3090009B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3129097A1 (en) * | 2021-11-16 | 2023-05-19 | Thermocompact | Wire electrode |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH693738A5 (en) * | 1999-05-07 | 2004-01-15 | Mitsubishi Electric Corp | Method and apparatus for Oberflaechenentladungsbea rbeitung and an electrode for Oberflaechenentladungsbearbeitung. |
| EP3053688B1 (en) * | 2015-02-06 | 2019-10-09 | Agie Charmilles SA | Graphene electrode and method of producing such electrode |
| CN105033377B (en) * | 2015-07-30 | 2017-05-10 | 宁波博威麦特莱科技有限公司 | Electrode wire for efficient low-loss spark corrosion machining and preparation method thereof |
-
1995
- 1995-11-30 JP JP07312290A patent/JP3090009B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3129097A1 (en) * | 2021-11-16 | 2023-05-19 | Thermocompact | Wire electrode |
| WO2023088602A1 (en) | 2021-11-16 | 2023-05-25 | Thermocompact | Electrode wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09150319A (en) | 1997-06-10 |
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