JPH1177437A - Electrode wire for wire electric discharge machining and manufacture thereof - Google Patents
Electrode wire for wire electric discharge machining and manufacture thereofInfo
- Publication number
- JPH1177437A JPH1177437A JP25142897A JP25142897A JPH1177437A JP H1177437 A JPH1177437 A JP H1177437A JP 25142897 A JP25142897 A JP 25142897A JP 25142897 A JP25142897 A JP 25142897A JP H1177437 A JPH1177437 A JP H1177437A
- Authority
- JP
- Japan
- Prior art keywords
- electric discharge
- discharge machining
- wire
- chromium
- chromium carbide
- 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.)
- Pending
Links
Abstract
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
用いられる電極線に関する。The present invention relates to an electrode wire used for wire electric discharge machining.
【０００２】[0002]
【従来の技術】ワイヤ放電加工は、自由に金属を切削す
ることができるため、金型加工を始め、様々な分野で用
いられている。このワイヤ放電加工に用いられる電極線
の材質は、ワイヤ自体の消耗速度のみならず、被加工物
の加工速度、仕上がりの良好さなどに大きく影響を及ぼ
すため、様々な検討が行われてきた。すなわち黄銅をベ
ースにケイ素やアルミニウム化合物を添加することによ
り高温強度及び放電加工速度の向上を図っているが、大
きな成果は得られていない。そのなかで特開平４−２４
１６号公報記載の技術では、周期表ＩＶ族及びＶ族の中
から選ばれた１種または２種以上の元素の炭化物を黄銅
に０．０１重量％以上３重量％添加することにより、放
電加工速度を黄銅に比べて１．２〜１．３倍に向上させ
ている。しかしながら、この技術では銅地金を溶解し、
上記炭化物及び亜鉛を添加し、得られた銅合金材を熱間
押出しにより加工し、さらに延伸加工して直径０．２ｍ
ｍのワイヤを製造している。このようにこの技術では製
造工程が長い上複雑で、得られた製品であるワイヤ放電
加工用電極線は高価なものとならざるを得なかった。2. Description of the Related Art Wire electric discharge machining can be used to cut metal freely, and is therefore used in various fields including die machining. Various studies have been made on the material of the electrode wire used in the wire electric discharge machining, since it greatly affects not only the consumption speed of the wire itself, but also the machining speed of the workpiece and the good finish. That is, although the high-temperature strength and the electric discharge machining speed are improved by adding silicon or an aluminum compound based on brass, no great results have been obtained. Among them, JP-A-4-24
In the technique described in Japanese Patent Application Publication No. 16-301, electric discharge machining is performed by adding a carbide of one or more elements selected from the group IV and group V of the periodic table to brass in an amount of 0.01% by weight or more and 3% by weight. The speed is improved 1.2 to 1.3 times as compared with brass. However, this technique dissolves the copper ingot,
The above-mentioned carbide and zinc are added, and the obtained copper alloy material is processed by hot extrusion, and further stretched to have a diameter of 0.2 m.
m of wire. As described above, in this technique, the manufacturing process is long and complicated, and the resulting product, that is, the electrode wire for wire electric discharge machining, has to be expensive.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題点を解決する、製造が容易で、かつ、高速な放
電加工が可能なワイヤ放電加工用電極線を提供すること
を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an electrode wire for wire electric discharge machining which solves the above-mentioned problems of the prior art, is easy to manufacture, and enables high-speed electric discharge machining. I do.
【０００４】[0004]
【課題を解決するための手段】本発明のワイヤ放電加工
用電極線は、請求項１に記載のように、黄銅をマトリッ
クスとし、かつ該マトリックス中に炭素、クロム及び炭
化クロムが分散している構成を有する。また、本発明の
ワイヤ放電加工用電極線の製造方法は、請求項４に記載
のように、銅溶湯に亜鉛及び炭化クロムを添加し攪拌す
る工程を有する。あるいは 本発明のワイヤ放電加工用
電極線の製造方法は、請求項５に記載のように、黄銅溶
湯に炭化クロムを添加し攪拌する工程を有する。According to the first aspect of the present invention, there is provided an electrode wire for wire electric discharge machining, wherein brass is used as a matrix, and carbon, chromium and chromium carbide are dispersed in the matrix. Having a configuration. The method for producing an electrode wire for wire electric discharge machining according to the present invention includes a step of adding zinc and chromium carbide to a molten copper and stirring the molten copper. Alternatively, the method for manufacturing an electrode wire for wire electric discharge machining according to the present invention includes a step of adding chromium carbide to a molten brass and stirring the molten metal.
【０００５】[0005]
【発明の実施の形態】本発明において、炭化クロム粒子
が黄銅マトリックス中に分散していることにより、機械
特性が向上し、かつ、クロム粒子が黄銅マトリックス中
に分散していることにより高温強度が向上する。さらに
炭素が黄銅マトリックス中に混入しているため、放電特
性が向上する。また、このように炭化クロムを用いるこ
とにより本発明に係るワイヤ放電加工用電極線の製造方
法では熱間押出加工を不要とすることができ、このよう
な溶湯から得られた鋳造物を熱間圧延、引き抜き加工し
て、迅速な放電加工を可能とする本発明のワイヤ放電加
工用電極線を得ることができる。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, chromium carbide particles are dispersed in a brass matrix, whereby mechanical properties are improved, and chromium particles are dispersed in a brass matrix, whereby high-temperature strength is improved. improves. Further, since carbon is mixed in the brass matrix, discharge characteristics are improved. In addition, by using chromium carbide in this manner, the method for manufacturing an electrode wire for wire electric discharge machining according to the present invention can eliminate the need for hot extrusion. The electrode wire for wire electric discharge machining of the present invention which enables rapid electric discharge machining by rolling and drawing can be obtained.
【０００６】本発明のワイヤ放電加工用電極線では、マ
トリックス中に炭素が混入していることが必要であり、
かつ該マトリックス中に炭化クロム粒子及びクロム粒子
が分散していることも必要である。このような構成は、
黄銅溶湯に炭化クロム粒子を添加後攪拌して、あるいは
銅溶湯に亜鉛及び炭化クロム粒子を添加し攪拌させて得
ることができる。In the electrode wire for wire electric discharge machining of the present invention, it is necessary that carbon is mixed in the matrix.
It is also necessary that chromium carbide particles and chromium particles are dispersed in the matrix. Such a configuration,
It can be obtained by adding chromium carbide particles to the molten brass and then stirring, or adding zinc and chromium carbide particles to the molten copper and stirring.
【０００７】このような系に添加された炭化クロムは部
分的に分解して炭素及びクロムとなる。炭化クロムの添
加量としては０．０５重量％以上５重量％以下であるこ
とが必要である。０．０５重量％未満であると添加によ
る効果が充分得られない。一方、５重量％超添加しても
効果は飽和し、さらに過超に添加すると脆化し、ワイヤ
への加工が困難となる。なお、上記溶湯は強化材である
炭化クロム粒子あるいはクロム粒子、炭素粒子の沈降を
防止するため、適宜攪拌する。なお、攪拌は通常の攪拌
手段（機械攪拌、電磁攪拌）で充分である。[0007] Chromium carbide added to such a system is partially decomposed into carbon and chromium. It is necessary that the addition amount of chromium carbide is 0.05% by weight or more and 5% by weight or less. If it is less than 0.05% by weight, the effect of the addition cannot be sufficiently obtained. On the other hand, the effect is saturated even if it is added in excess of 5% by weight, and if it is added in excess, the material becomes brittle and processing into a wire becomes difficult. The molten metal is appropriately stirred to prevent sedimentation of the chromium carbide particles or the chromium particles and carbon particles as the reinforcing material. Note that ordinary stirring means (mechanical stirring, electromagnetic stirring) is sufficient for stirring.
【０００８】本発明において強化材である炭化クロム粒
子を均一分散させる目的で、マグネシウムを添加しても
良い。この添加により炭化クロムと黄銅とのぬれ性が向
上し、良好な分散が得られる。なお、マグネシウムの添
加量としては０．０５重量％以上１重量％以下であるこ
とが望ましい。添加量が０．０５重量％未満であると添
加の効果が得られず、また１重量％以上であるとその効
果が飽和する。In the present invention, magnesium may be added for the purpose of uniformly dispersing chromium carbide particles as a reinforcing material. By this addition, the wettability between chromium carbide and brass is improved, and good dispersion is obtained. The amount of magnesium added is desirably 0.05% by weight or more and 1% by weight or less. If the addition amount is less than 0.05% by weight, the effect of addition cannot be obtained, and if it is 1% by weight or more, the effect is saturated.
【０００９】[0009]
【実施例】以下、本発明の実施例について記載する。炭
化クロム（Ｃｒ3Ｃ2）としては、平均粒径６μｍのもの
を用いた。アルゴンガス雰囲気下、高周波溶解炉を用い
てるつぼに銅を入れて溶解し、この銅溶湯中に亜鉛（Ｚ
ｎ）、分散助剤であるマグネシウム（Ｍｇ）及び炭化ク
ロムを表１に示す混合比になるよう添加し、１００ｒｐ
ｍで攪拌して均一分散させ、また炭化クロムを黄銅マト
リックス中でクロムと炭素に分解させた。次いで、この
ように得た溶湯をそれぞれ直径１５ｍｍの鋳型に鋳込
み、熱間圧延の後、引抜き加工を行い、直径０．２ｍｍ
の電極線を製造した。Embodiments of the present invention will be described below. Chromium carbide (Cr 3 C 2 ) having an average particle diameter of 6 μm was used. Under an argon gas atmosphere, copper was put into a crucible using a high-frequency melting furnace and melted, and zinc (Z
n), magnesium (Mg) as a dispersing aid and chromium carbide were added so as to have a mixing ratio shown in Table 1, and 100 rpm
Chromium carbide was decomposed into chromium and carbon in a brass matrix. Next, the molten metal thus obtained was cast into a mold having a diameter of 15 mm, and after hot rolling, drawing was performed to obtain a 0.2 mm diameter.
Was manufactured.
【００１０】これら電極線をワイヤ放電加工機にセット
して、放電加工速度及び被加工物の表面状態（ＪＩＳ
Ｂ０６０１（抜き取り部分の十点平均粗さ）による）の
評価を行った。その結果を４００℃における引張強さ及
び導電率の測定結果と共に表１に併せて記載する。な
お、放電加工は４条件で行い、条件１、条件２、条件３
及び条件４はこの順番に加工電圧及び電流が高くなって
過酷な条件となり、その結果この順番に加工速度を高め
ることが可能となる。なお、これら放電加工試験中に電
極線に切断が生じた場合には、それ以上の加工ができな
いとして「×」を付して示した。These electrode wires are set in a wire electric discharge machine, and the electric discharge machining speed and the surface condition of the workpiece (JIS)
B0601 (based on the ten-point average roughness of the sampled portion). The results are shown in Table 1 together with the measurement results of the tensile strength and the electrical conductivity at 400 ° C. The electric discharge machining was performed under four conditions, and conditions 1, 2, 3
In Condition 4, the machining voltage and current increase in this order, resulting in severe conditions. As a result, the machining speed can be increased in this order. In addition, when the electrode wire was cut during these electric discharge machining tests, it was indicated with "x" because further machining was not possible.
【００１１】[0011]
【表１】 [Table 1]
【００１２】表１より、炭化クロムを０．０５重量％以
上含有する本発明に係る電極線は炭化クロムを含まない
黄銅製電極線に比べ、導電率が同レベルであるにも拘わ
らず、高温強度が高く放電特性が良好であるため、放電
加工条件を過酷にすることによりその加工速度を早くし
ても断線が生じず、またそのときの被加工物の表面状態
も良好な優れた電極線であることが判る。From Table 1, it can be seen that the electrode wire according to the present invention containing 0.05% by weight or more of chromium carbide has the same level of conductivity as the electrode wire made of brass containing no chromium carbide, but has a high temperature. Excellent electrode wire with high strength and good discharge characteristics, so that even if the machining speed is increased by making the electric discharge machining conditions severe, disconnection does not occur and the surface condition of the workpiece at that time is also excellent. It turns out that it is.
【００１３】なお、炭化クロム（Ｃｒ3Ｃ2）の添加量が
０．１％、１％及び３％のときの上記ワイヤ放電加工用
電極線の断面について走査型電子顕微鏡写真を撮影し、
同一箇所を同一倍率で電子線マイクロアナライザ（ＥＰ
ＭＡ）により強化材のマトリックス内への析出の有無を
調べた。結果をそれぞれ図１〜図３に示す。これら図に
おいて（ａ）は走査型電子顕微鏡写真、（ｂ）はクロム
の分布状況、（ｃ）は炭素の分布状況を示す。これら図
により、これらワイヤ放電加工用電極線には黄銅マトリ
ックス中に炭素、クロム及び炭化クロムが分散している
ことが判る。A scanning electron microscope photograph was taken of the cross section of the electrode wire for wire electric discharge machining when the addition amount of chromium carbide (Cr 3 C 2 ) was 0.1%, 1% and 3%.
Electron beam microanalyzer (EP
MA) was used to examine the presence or absence of precipitation of the reinforcing material in the matrix. The results are shown in FIGS. In these figures, (a) shows a scanning electron micrograph, (b) shows the distribution of chromium, and (c) shows the distribution of carbon. These figures show that carbon, chromium and chromium carbide are dispersed in the brass matrix in these electrode wires for wire electric discharge machining.
【００１４】[0014]
【発明の効果】本発明に係るワイヤ放電加工用電極線
は、製造が容易で、かつ、高速な放電加工が可能な優れ
たワイヤ放電加工用電極線である。The electrode wire for wire electric discharge machining according to the present invention is an excellent electrode wire for wire electric discharge machining which is easy to manufacture and capable of high-speed electric discharge machining.
【図１】（ａ）炭化クロム（Ｃｒ3Ｃ2）の添加量を０．
１％としたときの本発明に係るワイヤ放電加工用電極線
の断面を示す走査型電子顕微鏡写真である。 （ｂ）（ａ）の断面（同一箇所、同一倍率）のクロムの
分布調査結果を示す図（写真）である。 （ｃ）（ａ）の断面（同一箇所、同一倍率）の炭素の分
布調査結果を示す図（写真）である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) The addition amount of chromium carbide (Cr 3 C 2 ) is set to 0.
It is a scanning electron microscope photograph which shows the cross section of the electrode wire for wire electric discharge machining according to the present invention at 1%. (B) It is a figure (photograph) showing the distribution inspection result of chromium in the section (the same place and the same magnification) of (a). (C) It is a figure (photograph) showing the carbon distribution investigation result of the section (the same place and the same magnification) of (a).
【図２】（ａ）炭化クロム（Ｃｒ3Ｃ2）の添加量を１％
としたときの本発明に係るワイヤ放電加工用電極線の断
面を示す走査型電子顕微鏡写真である。 （ｂ）（ａ）の断面（同一箇所、同一倍率）のクロムの
分布調査結果を示す図（写真）である。 （ｃ）（ａ）の断面（同一箇所、同一倍率）の炭素の分
布調査結果を示す図（写真）である。FIG. 2 (a) The amount of chromium carbide (Cr 3 C 2 ) added is 1%
5 is a scanning electron micrograph showing a cross section of the electrode wire for wire electric discharge machining according to the present invention when the above-mentioned condition is satisfied. (B) It is a figure (photograph) showing the distribution inspection result of chromium in the section (the same place and the same magnification) of (a). (C) It is a figure (photograph) showing the carbon distribution investigation result of the section (the same place and the same magnification) of (a).
【図３】（ａ）炭化クロム（Ｃｒ3Ｃ2）の添加量を３％
としたときの本発明に係るワイヤ放電加工用電極線の断
面を示す走査型電子顕微鏡写真である。 （ｂ）（ａ）の断面（同一箇所、同一倍率）のクロムの
分布調査結果を示す図（写真）である。 （ｃ）（ａ）の断面（同一箇所、同一倍率）の炭素の分
布調査結果を示す図（写真）である。FIG. 3 (a) The addition amount of chromium carbide (Cr 3 C 2 ) is 3%
5 is a scanning electron micrograph showing a cross section of the electrode wire for wire electric discharge machining according to the present invention when the above-mentioned condition is satisfied. (B) It is a figure (photograph) showing the distribution inspection result of chromium in the section (the same place and the same magnification) of (a). (C) It is a figure (photograph) showing the carbon distribution investigation result of the section (the same place and the same magnification) of (a).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮川 拓也 静岡県裾野市御宿1500 矢崎総業株式会社 内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takuya Miyagawa 1500 Onjuku, Susono City, Shizuoka Prefecture Inside Yazaki Corporation
Claims (6)
ックス中に炭素、クロム及び炭化クロムが分散している
ことを特徴とするワイヤ放電加工用電極線。1. An electrode wire for wire electric discharge machining, wherein brass is used as a matrix, and carbon, chromium and chromium carbide are dispersed in the matrix.
化クロムとして０．０５重量％以上５重量％以下存在し
ていることを特徴とする請求項１に記載のワイヤ放電加
工用電極線。2. The electrode wire for wire electric discharge machining according to claim 1, wherein the carbon, chromium and chromium carbide are present in an amount of 0.05 to 5% by weight as chromium carbide.
徴とする請求項１または請求項２に記載のワイヤ放電加
工用電極線。3. The electrode wire for wire electric discharge machining according to claim 1, wherein magnesium is added.
拌することを特徴とするワイヤ放電加工用電極線の製造
方法。4. A method for producing an electrode wire for wire electric discharge machining, wherein zinc and chromium carbide are added to a molten copper and stirred.
ことを特徴とするワイヤ放電加工用電極線の製造方法。5. A method for producing an electrode wire for wire electric discharge machining, comprising adding chromium carbide to a molten brass metal and stirring.
る請求項４または請求項５に記載のワイヤ放電加工用電
極線の製造方法。6. The method for producing an electrode wire for wire electric discharge machining according to claim 4, wherein magnesium is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25142897A JPH1177437A (en) | 1997-09-02 | 1997-09-02 | Electrode wire for wire electric discharge machining and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25142897A JPH1177437A (en) | 1997-09-02 | 1997-09-02 | Electrode wire for wire electric discharge machining and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1177437A true JPH1177437A (en) | 1999-03-23 |
Family
ID=17222705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25142897A Pending JPH1177437A (en) | 1997-09-02 | 1997-09-02 | Electrode wire for wire electric discharge machining and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1177437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10780476B2 (en) | 2018-02-22 | 2020-09-22 | E. Holdings, Inc | Method for making Mg brass EDM wire |
-
1997
- 1997-09-02 JP JP25142897A patent/JPH1177437A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10780476B2 (en) | 2018-02-22 | 2020-09-22 | E. Holdings, Inc | Method for making Mg brass EDM wire |
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