JPH0366524A - Electrode wire for electric discharge machining - Google Patents
Electrode wire for electric discharge machiningInfo
- Publication number
- JPH0366524A JPH0366524A JP19971889A JP19971889A JPH0366524A JP H0366524 A JPH0366524 A JP H0366524A JP 19971889 A JP19971889 A JP 19971889A JP 19971889 A JP19971889 A JP 19971889A JP H0366524 A JPH0366524 A JP H0366524A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- brass
- electric discharge
- copper
- electrode wire
- 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
- 238000003754 machining Methods 0.000 title claims abstract description 21
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 22
- 239000010951 brass Substances 0.000 claims abstract description 22
- 239000010439 graphite Substances 0.000 claims abstract description 15
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010419 fine particle Substances 0.000 claims abstract description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000009760 electrical discharge machining Methods 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000007747 plating Methods 0.000 description 20
- 239000010410 layer Substances 0.000 description 10
- 239000006185 dispersion Substances 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- PEVJCYPAFCUXEZ-UHFFFAOYSA-J dicopper;phosphonato phosphate Chemical compound [Cu+2].[Cu+2].[O-]P([O-])(=O)OP([O-])([O-])=O PEVJCYPAFCUXEZ-UHFFFAOYSA-J 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ワイヤ放電加工機に用いられる放電加工特性
を改善した放電加工用電極線に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrode wire for electric discharge machining that is used in a wire electric discharge machine and has improved electric discharge machining characteristics.
Ｃ従来の技術〕
ワイヤ放電加工機は、被加工物と電極線との間に高電圧
を加え、その放電エネルギーによって被加工物を加工す
るもので、巾ひろく実用化されている。C. Prior Art] A wire electrical discharge machine applies a high voltage between a workpiece and an electrode wire, and processes the workpiece using the discharge energy, and has been widely put into practical use.
通常、電極線としては加工速度が大で、仕Ｊ−精度の良
好なものが要求されている。Usually, electrode wires are required to have high processing speed and good precision.
従来のワイヤ放電加工用電極線としては、直径０．１−
０．３ｍｍの銅、黄銅（Ｃｕ−３５Ｚｎ程度）タングス
テン、モリブデン等の細線が用いられている。Conventional wire electric discharge machining electrode wires have a diameter of 0.1-
A thin wire of 0.3 mm of copper, brass (about Cu-35Zn), tungsten, molybdenum, etc. is used.
タングステン、モリブデン線は高強度のため、線径を細
くでき、高精度の加工ができるが、線径を細くする場合
の加工性が悪く、高価となるため、特殊な用途にしか使
えないという問題点がある。Tungsten and molybdenum wires have high strength, so they can be made thinner and processed with high precision, but the problem is that they have poor workability when making the wire diameter thinner and are expensive, so they can only be used for special purposes. There is a point.
また、銅線は伸線加工性が良いので安価であるが、引張
強度が小さいため断線しやすく、又短絡も発生しやすい
ので高速化ができず、放電加工性が悪いという問題点が
ある。In addition, copper wire has good wire drawability and is therefore inexpensive, but its low tensile strength causes wire breakage and short-circuiting, making it impossible to increase the speed and causing poor electrical discharge machinability.
さらに、黄銅は強度が比較的高く、放電特性も良好なた
め広く実用化されているが、黄銅は高温強度が小さいた
め、高張力を付加できず、加工速度を上げると断線しや
すいという問題点がある。Furthermore, brass has relatively high strength and good discharge characteristics, so it is widely put into practical use. However, brass has low high-temperature strength, so high tension cannot be applied to it, and it is prone to wire breakage when machining speed is increased. There is.
また近羊、黄銅線上に低融点の亜鉛を被覆した電極線が
提案され、加工速度、加工精度ともかなり改善されたが
高温強度が低いため、加工速度を上げると断線しやすい
という問題点は依然として残っていた。In addition, Chikahi proposed an electrode wire in which a brass wire was coated with low-melting-point zinc, and although the machining speed and machining accuracy were considerably improved, the problem of low high-temperature strength and the tendency to break when the machining speed was increased still remained. It remained.
本発明は上記従来の問題点を除去し、加工速度が大きく
、かつ高精度の放電加工を行なうことができる電極線を
得ることを目的としたものである。The object of the present invention is to eliminate the above-mentioned conventional problems and to obtain an electrode wire that has a high machining speed and can perform electric discharge machining with high accuracy.
即ち、硬鋼線、ステンレス鋼線、黄銅線等の金属線の表
面に、平均粒径が１Ｏ７ｊ１１以下の黒鉛粒子を分散し
、かつ０．１μｍ〜２０ＩＩａの厚さをｈｏする銅又は
黄銅の被覆層を形成し、好ましくは、被覆層が平均亜鉛
濃度２０〜５０％の黄銅で、かつ亜鉛濃度が表面部から
内部に向って減少する組成変化を有するよう形成した放
電加工用１ｒＬ極線を提供するものである。That is, a copper or brass coating in which graphite particles with an average particle size of 1O7j11 or less are dispersed on the surface of a metal wire such as a hard steel wire, stainless steel wire, or brass wire, and the thickness is 0.1 μm to 20IIa. Provided is a 1rL polar wire for electric discharge machining, in which the coating layer is preferably made of brass having an average zinc concentration of 20 to 50%, and has a composition change in which the zinc concentration decreases from the surface toward the inside. It is something to do.
以下、本発明の一実施例を図面に基いて説明する。Hereinafter, one embodiment of the present invention will be described based on the drawings.
〔実施例１〕
第１図および第２図に示すように、ピアノ線材（ＳＷＲ
５７２Ａ）にバテンテング処理、伸線を行ない、直径が
０．１８ｍ＋の硬鋼線からなる金属線（１）を？′Ｆ製
する。[Example 1] As shown in Figs. 1 and 2, piano wire rod (SWR
A metal wire (1) made of hard steel wire with a diameter of 0.18 m+ is made by battening and wire drawing 572A). 'Made by F.
上記金属線（１）にアルカリ脱脂、酸洗をした後、下記
メツキ条件で銅−黒鉛の分散めっきを行ない、銅めっき
層中に黒鉛粒子（３）を分散させた、めっき厚さが１１
０ｌ１の被覆層（２）を形成した放電加工用電極線（４
）を構成した。After degreasing and pickling the metal wire (1), copper-graphite dispersion plating was performed under the following plating conditions, and the graphite particles (3) were dispersed in the copper plating layer, resulting in a plating thickness of 11
Electrode wire for electrical discharge machining (4) with a coating layer (2) of 0l1 formed
) was configured.
（めっき条件）
ビロリン酸銅 ８５９／＋２
ピロリン酸カリ ３２５ｇ／＋２
アンモニア水 ３ ａ１２／αＰＨ８，８
液 温 ５０ ℃
電流密度 ５ Ａ／論
黒 鉛 ２ｇ／＋２（平均粒径０．５．
ｃａ）次に、ワイヤ放電加工機により厚さ２０ｍｍの５
ＫＤＩＩを被切断材として切断試験を行ない、上記実施
例１の電極線（４）と直径０．２閣の黄銅線（６５％Ｃ
ｕ）からなる電極線との加工速度を比較した。(Plating conditions) Copper pyrophosphate 859/+2 Potassium pyrophosphate 325g/+2 Ammonia water 3 a12/αPH8,8 Liquid temperature 50°C Current density 5 A/thermal graphite 2g/+2 (average particle size 0.5.
ca) Next, a 20mm thick 5
A cutting test was conducted using KDII as the material to be cut, and the electrode wire (4) of Example 1 and the brass wire (65% C
The processing speed was compared with the electrode wire made of u).
実施例１の電極線（４）の加工速度は２−７ｍ＋＋＋／
ｍｉｎとなり、黄銅線よりなる電極線の１．３ 倍で
あった。又、被切断材の加工面に銅の融着もなく良好な
表面状態が得られた。The processing speed of the electrode wire (4) in Example 1 was 2-7m+++/
min, which was 1.3 times that of the electrode wire made of brass wire. In addition, a good surface condition was obtained with no copper fusion on the processed surface of the workpiece.
〔実施例２〕
実施例１と同様に得られた金属線に脱脂、酸洗をした後
、実施例１と同様のめつき条件で厚さ７ｔａの銅−黒鉛
の分散めっきを行ない、その後、引き続き下記のめっき
条件にてめっき厚さ３殉の亜鉛−黒鉛の分散めっきを行
なった。[Example 2] After degreasing and pickling the metal wire obtained in the same manner as in Example 1, dispersion plating of copper-graphite with a thickness of 7 ta was performed under the same plating conditions as in Example 1, and then, Subsequently, zinc-graphite dispersion plating with a plating thickness of 3 was performed under the following plating conditions.
（めっき条件）
ｆＩｔ酸亜鉛亜鉛 ４１０ ｇ／α塩化アルミニ
ウム ２０ｇ／Ｑ
硫酸ナトリウム ７５ｇ／Ｑ
ＰＨ４，５
液 温 ３０ ℃
電流密度 ３ Ａ／−
素ガス雰囲気炉中で３５０℃に加熱して銅−亜鉛めっき
層間の拡散を進行させ、黄銅−黒鉛の分散めっき層とし
た被覆層を形成した放電加工用電極線を構成した。(Plating conditions) Zinc fIt acid 410 g/α Aluminum chloride 20 g/Q Sodium sulfate 75 g/Q PH4,5 Liquid Temperature 30°C Current density 3 A/- Copper-zinc was heated to 350°C in a gas atmosphere furnace. An electrode wire for electric discharge machining was constructed in which diffusion between the plating layers was promoted to form a covering layer that was a dispersed plating layer of brass and graphite.
この熱処理によりｆｆｆｉｉ線の真直性も改善され、作
業性が良好となった。なお、黄銅層中の亜鉛濃度は均一
ではなく、表面の亜鉛含有量が高く、内面に向って減少
する組成変化を有する構造にな−）ている。This heat treatment also improved the straightness of the fffii wire, resulting in good workability. Note that the zinc concentration in the brass layer is not uniform, and has a structure in which the zinc content is high on the surface and changes in composition decreasing toward the inner surface.
次に、上記黄銅−黒鉛の分散めっき処理した電極線を用
いて実施例１と同様の切断試験を行なったところ、本実
施例の電極線の加工速度は２ 、９ ｍｍ／ｍｉｎで黄
銅線の１．４倍に増加した。Next, a cutting test similar to that in Example 1 was conducted using the above-mentioned brass-graphite dispersion-plated electrode wire. It increased by 1.4 times.
上記実施例において、銅−亜鉛の組成比はα又はβ構造
を有する２０〜５０％Ｚｎの範囲が適当であるが、上記
のように熱処理により黄銅とする場合は、表面部の亜鉛
濃度を内部よりも高くすることが可能で、安定した放電
特性を有する電極線が得られる。In the above example, the appropriate copper-zinc composition ratio is in the range of 20 to 50% Zn having an α or β structure. However, when brass is made by heat treatment as described above, the zinc concentration on the surface part is adjusted internally. It is possible to obtain an electrode wire having stable discharge characteristics.
本発明の電極線としては放電加工時に高張力を付加した
状態で高速加工を可能とするため、高強度で耐熱性の良
好な硬鋼線、ステンレス鋼線９合金鋼線等の鋼線が適し
ている。これらの鋼線は予めその表面に銅、黄銅、ニッ
ケル等の薄めつきを施してもよい。As the electrode wire of the present invention, since high-speed machining is possible with high tension applied during electrical discharge machining, steel wires with high strength and good heat resistance, such as hard steel wire, stainless steel wire, and 9 alloy steel wire, are suitable. ing. The surface of these steel wires may be thinned with copper, brass, nickel, etc. in advance.
又、銅系合金線の使用も可能で、この場合は導電性が良
好な上、表面層の耐熱性が改善されるため切断速度の向
上が可能となる。It is also possible to use a copper-based alloy wire; in this case, it has good conductivity and the heat resistance of the surface layer is improved, making it possible to increase the cutting speed.
さらに、めっき層の厚さは０．２川より薄いと導電率は
増加するが、放電特性に大きな変化は見られず、又、金
属線は次第に細くする必要があるため、電極線の強度が
低下するだけでなく、非常に高価になる。従って、めっ
き厚さは０．２〜２０浦が適当であり、特に５〜１５浦
の範囲が良好である。Furthermore, if the thickness of the plating layer is less than 0.2 mm, the conductivity will increase, but no major change will be seen in the discharge characteristics.Also, since the metal wire must be gradually made thinner, the strength of the electrode wire will decrease. Not only will it be degraded, but it will also be very expensive. Therefore, a suitable plating thickness is 0.2 to 20 pores, and a range of 5 to 15 pores is particularly good.
銅又は黄銅めっき層中に分散させる黒３０微粒子は耐熱
性が良好で、導電性もあるので電極材として最も適して
いる。黒鉛を銅または黄銅めっき中に分散させることに
より、放電に伴う電極線表面の消耗を減じると同時に、
加工中安定した放電が行なわれる。このように、金属線
をめっき層との相乗作用により高速度の加工が可能とな
り、又加工面の精度の向上も期待できる。Black 30 fine particles dispersed in the copper or brass plating layer have good heat resistance and conductivity, and are therefore most suitable as an electrode material. By dispersing graphite in copper or brass plating, it reduces wear on the electrode wire surface due to discharge, and at the same time
Stable electrical discharge occurs during machining. In this way, the synergistic effect of the metal wire with the plating layer enables high-speed machining, and can also be expected to improve the accuracy of the machined surface.
なお、黒鉛の粒径はあまり大きいと電極線表面の凹凸も
大きくなり、寸法精度が低下し、放電も不安定になるの
で１０ｇｍ以下が望ましい。Note that if the particle size of graphite is too large, the unevenness of the surface of the electrode wire will become large, the dimensional accuracy will decrease, and the discharge will become unstable, so it is desirable that the particle size is 10 gm or less.
本発明の放電加工用電極線は金属線の表面に導電率が大
きく、放電性の優れた銅又は黄銅のめっき贋を形成し、
めっき層中に耐熱性の良い黒鉛粒子を分散しているため
、放電加工において安定した放電が得られ、加工速度を
大巾に向上することができる。The electrode wire for electric discharge machining of the present invention forms a copper or brass plating with high conductivity and excellent discharge properties on the surface of the metal wire,
Since graphite particles with good heat resistance are dispersed in the plating layer, stable discharge can be obtained during electrical discharge machining, and machining speed can be greatly improved.
又、放電加工時に従来よりも高張力での加工が可能で、
かつ、放電による電極線の消耗も少なくなるため、加工
面の精度が良好になるという優れた効果を有するもので
ある。In addition, it is possible to perform electrical discharge machining with higher tension than before.
In addition, wear of the electrode wire due to electric discharge is reduced, which has the excellent effect of improving the accuracy of the machined surface.
第１図は本発明の放電加工用電極線の一実施例を示す正
面図、第２図は第１図のＡ−Ａ！ｌｉＡ拡大断面図であ
る。
（１）・・・・・・金属線 （２）・・・・・・
被覆層（３）・・・・・・黒鉛粒子
（４）・・・・・・放電加工用電極線FIG. 1 is a front view showing an embodiment of the electrode wire for electric discharge machining of the present invention, and FIG. It is an enlarged sectional view of liA. (1)・・・Metal wire (2)・・・・・・
Covering layer (3)...Graphite particles (4)...Electrode wire for electrical discharge machining
Claims (2)
面に、平均粒径が１０μｍ以下の黒鉛微粒子を分散し、
かつ０．１μｍ〜２０μｍの厚さを有する銅又は黄銅の
被覆層を形成したことを特徴とする放電加工用電極線。(1) Graphite fine particles with an average particle size of 10 μm or less are dispersed on the surface of a metal wire such as a hard steel wire, stainless steel wire, or brass wire,
An electrode wire for electric discharge machining, characterized in that a copper or brass coating layer having a thickness of 0.1 μm to 20 μm is formed.
つ亜鉛濃度が表面部から内部に向って減少する組成変化
を有する請求項１記載の放電加工用電極線。(2) The electrode wire for electrical discharge machining according to claim 1, wherein the coating layer is made of brass having an average zinc concentration of 20 to 50%, and has a composition change in which the zinc concentration decreases from the surface toward the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19971889A JPH0366524A (en) | 1989-07-31 | 1989-07-31 | Electrode wire for electric discharge machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19971889A JPH0366524A (en) | 1989-07-31 | 1989-07-31 | Electrode wire for electric discharge machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366524A true JPH0366524A (en) | 1991-03-22 |
Family
ID=16412458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19971889A Pending JPH0366524A (en) | 1989-07-31 | 1989-07-31 | Electrode wire for electric discharge machining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366524A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011152327A1 (en) * | 2010-06-04 | 2011-12-08 | 鈴木金属工業株式会社 | Electrode wire for electrical discharge machining |
| JP2020040171A (en) * | 2018-09-11 | 2020-03-19 | 日鉄Ｓｇワイヤ株式会社 | Wire electrical discharge machining electrode wire |
-
1989
- 1989-07-31 JP JP19971889A patent/JPH0366524A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011152327A1 (en) * | 2010-06-04 | 2011-12-08 | 鈴木金属工業株式会社 | Electrode wire for electrical discharge machining |
| JP2011251394A (en) * | 2010-06-04 | 2011-12-15 | Suzuki Kinzoku Kogyo Kk | Electrode wire for electric discharge machining |
| CN102971102A (en) * | 2010-06-04 | 2013-03-13 | 铃木金属工业株式会社 | Electrode wire for electrical discharge machining |
| JP2020040171A (en) * | 2018-09-11 | 2020-03-19 | 日鉄Ｓｇワイヤ株式会社 | Wire electrical discharge machining electrode wire |
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