JPH0716823B2 - Electromachining liquid - Google Patents
Electromachining liquidInfo
- Publication number
- JPH0716823B2 JPH0716823B2 JP7693586A JP7693586A JPH0716823B2 JP H0716823 B2 JPH0716823 B2 JP H0716823B2 JP 7693586 A JP7693586 A JP 7693586A JP 7693586 A JP7693586 A JP 7693586A JP H0716823 B2 JPH0716823 B2 JP H0716823B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- compound
- electromachining
- present
- group
- 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
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyethers (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
【発明の詳細な説明】 （発明の利用分野） 本発明は、電気と被工作物との間に断続的な放電を行な
わせて放電加工を行う際、電極と被加工物との間に介在
させるための電気加工液に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Use of the Invention) The present invention interposes between an electrode and a workpiece when performing electrical discharge machining by causing intermittent electrical discharge between electricity and the workpiece. The present invention relates to an electromachining liquid.
（従来の技術） 放電加工は作業用電極と導電性被工作物との間の絶縁性
媒体内で断続的に火花放電させることにより、対象物に
形彫を施したり、孔を穿ったり、又は対象物を切断した
りする技術である。そしてこの技術は、対象物の硬度に
影響されないこと、表面粗さ±0.2μｍ又はそれ以下の
鏡面仕上に近い加工精度を期待できること等の特徴を買
われて、今日各種の金属加工に広く利用されている。(Prior Art) In electric discharge machining, an object is engraved, a hole is formed, or an object is carved by intermittent spark discharge in an insulating medium between a working electrode and a conductive workpiece. It is a technique of cutting an object. This technology has been widely used for various metal workings today, because it is not affected by the hardness of the object and it is expected to have a processing accuracy of surface roughness ± 0.2μm or less, which is close to a mirror finish. ing.
従来では、上の絶縁性媒体として主として鉱油（ケロシ
ン）が使用されてきた。しかしこの鉱油には引火性があ
るため、無人的に連続加工を行なう場合には火災発生の
危険がある。そこで近来に至り純水の使用が試みられる
ようになった。Conventionally, mineral oil (kerosene) has been mainly used as the above insulating medium. However, since this mineral oil is flammable, there is a risk of fire when performing continuous processing unmanned. Therefore, the use of pure water came to be tried recently.
しかしながら、水は加工速度が早い反面、電極を消耗さ
せるという欠点がある。そこで最近では、水中に種々の
分子量制御物質を添加することが検討され、例えばエチ
レングリコール、プロピレングリコール、ポリエチレン
グリコール、ポリアルキルエーテルなどのグリコール類
若しくはそれらの誘導体又は高級アルコール等の非イオ
ン性物質、ポリアクリル酸、アクリルアミド、グアーガ
ム又はアルギン酸ナトリウム等のアニオン性物質或はキ
トサン、ポリアクリルアミド又はメタアクリル酸エステ
ル等のカチオン性物質の添加が提案されている（例えば
特公昭59−4253号公報参照）。However, while water has a high processing speed, it has a drawback that it consumes the electrodes. Therefore, recently, addition of various molecular weight control substances to water has been studied, for example, ethylene glycol, propylene glycol, polyethylene glycol, glycols such as polyalkyl ethers or their derivatives, or nonionic substances such as higher alcohols, It has been proposed to add an anionic substance such as polyacrylic acid, acrylamide, guar gum or sodium alginate, or a cationic substance such as chitosan, polyacrylamide or methacrylic acid ester (see, for example, Japanese Patent Publication No. 59-4253).
しかしこのようにしても、電極消耗比は精々３％程度ま
でしか低下しない（上記公報２図参照）。しかるに形彫
り加工や孔明け加工において、充分な加工精度を得るた
めには、電極消耗率が精々１％未満であることが絶対条
件となるため、公知の水性加工液は、実用性の点でいづ
れも不満である。However, even in this case, the electrode consumption ratio is reduced to only about 3% (see FIG. 2 of the above publication). However, in order to obtain sufficient processing accuracy in the carving process and the drilling process, it is absolutely necessary that the electrode wear rate be less than 1% at all. I am dissatisfied with any of them.
（発明の目的） 本発明は、電極消耗率が画期的に低く、長時間に亘り連
続使用しても、該率を精々１％又はそれ未満に保つこと
ができる水性電気加工液を提供するのを目的とする。(Object of the Invention) The present invention provides an aqueous electromachining liquid that has an epoch-making electrode consumption rate and can maintain the rate at best at 1% or less even when continuously used for a long time. The purpose is.
（目的達成のための手段） 本発明者は、多数の新規及び公知の非イオン性高分子物
質について精力的な研究を行なった結果、分子中に、少
なくとも４個の置換又は非置換オキシエチレン基を含む
水溶性脂肪族エーテル化合物が、水性電気加工液の成分
として極めて好適であることを見出した。即ち、本発明
は、電気加工液の必須成分として、一般式 で示されるアルコキシオキシエチレン誘導体を含有する
ことを特徴とする。(Means for Achieving the Purpose) As a result of energetic research on many new and known nonionic polymer substances, the present inventor has found that at least four substituted or unsubstituted oxyethylene groups are present in the molecule. It has been found that a water-soluble aliphatic ether compound containing is extremely suitable as a component of an aqueous electroprocessing liquid. That is, the present invention, as an essential component of the electromachining liquid, the general formula It is characterized by containing an alkoxyoxyethylene derivative represented by.
ここに化合物（Ｉ）における置換基R1の例としては、例
えばメチル基、エチル基、プロピル基、イソプロピル
基、ブチル基、イソブチル基、第二級ブチル基等が例示
される。実際に使用される化合物（Ｉ）は、単一の基を
含む単一化合物であっても或は別種の基を含む化合物と
の混合物であってもよい。また置換基R2は、水素、メチ
ル基及びエチル基から選択される。本置換基R2について
も、化合物（Ｉ）は、使用上単一の化合物であっても又
は複数種類の化合物の混合物であることができる。Examples of the substituent R 1 in the compound (I) include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group and secondary butyl group. The compound (I) actually used may be a single compound containing a single group or a mixture with a compound containing another type of group. Further, the substituent R 2 is selected from hydrogen, a methyl group and an ethyl group. Also for the present substituent R 2 , the compound (I) may be a single compound in use or a mixture of plural kinds of compounds.
更に一般式、 で示されるオリゴ若しくはポリ置換又は非置換オキシエ
チレン基の重合数ｎは、４〜100（平均数）の範囲内で
あるのが好適である。ｎが４未満では充分な電極消耗率
の低下が見られず、反対にｎが100を越えると水溶液の
粘度が上昇する結果、作業が困難となる。因に、化合物
（Ｉ）の具体的例としては、例えば以下の化合物が例示
される。Further general formula, The polymerization number n of the oligo- or poly-substituted or unsubstituted oxyethylene group represented by is preferably in the range of 4 to 100 (average number). When n is less than 4, a sufficient decrease in the electrode wear rate is not observed, while when n is more than 100, the viscosity of the aqueous solution increases, which makes the work difficult. By the way, specific examples of the compound (I) include, for example, the following compounds.
なお、本発明においては、以上化合物（Ｉ）に属する各
化合物を、必要に応じ単独で又は組合せて使用すること
ができる。 In the present invention, each compound belonging to the above compound (I) can be used alone or in combination as necessary.
本発明加工液を調製するには、予め水をイオン交換樹脂
で処理してその比抵抗が104Ω・cm以上となる如く処理
した後、これに化合物（Ｉ）の適量を添加し、攪拌、溶
解させる。好ましい濃度は0.5〜85％であるが、この際
要すれば少量の防錆剤を添加してもよい。なお、以上の
調製操作に際し、イオン交換樹脂処理を最後に行なうこ
ともできる。In order to prepare the processing liquid of the present invention, water is previously treated with an ion exchange resin so that its specific resistance is 10 4 Ω · cm or more, and then an appropriate amount of the compound (I) is added and stirred. , Dissolve. The preferred concentration is 0.5 to 85%, but a small amount of rust preventive agent may be added at this time if necessary. In the above preparation operation, the ion exchange resin treatment may be performed last.
（実施例） 以下、実施例により発明実施の態様を説明するが、例示
が直接発明思想の内包・外延を限るものでないことは当
然である。(Examples) Hereinafter, embodiments of the present invention will be described with reference to Examples, but it goes without saying that the examples do not directly limit the inclusion and extension of the inventive idea.
実施例１ ［加工液の調製］ 前掲化合物（１）に属する化合物を水に溶解後、イオン
交換樹脂を通して２×105Ω・cmの比抵抗値を示すよう
に調製して試験用加工液とした。Example 1 [Preparation of Working Liquid] After dissolving a compound belonging to the above-mentioned compound (1) in water, it was prepared through an ion exchange resin so as to have a specific resistance value of 2 × 10 5 Ω · cm, and used as a test working liquid. did.
［使用化合物］ 下表−１として示す。[Compounds used] Shown in Table 1 below.
［実験条件］ 下表−２に示す。 [Experimental conditions] Table 2 below shows.
［結果］ 第１図乃至第３図の曲線Ａが示す通り、表−１の化合物
群中、化合物（Ｉ）に属するＡ−１〜Ａ−３の各化合物
を用いた加工液は、加工速度、電極消耗率及び耐久性の
いづれにおいても、対象化合物Ｃ−１及びＣ−２に比し
卓越した成績を示している事実が窺知される。実施例２
表−１の化合物を、予めイオン交換樹脂を用いて脱塩さ
れた純水に溶かした水溶液を加工液とし、以下の条件に
てワイヤカット加工を実施した。 [Results] As shown by the curve A in FIGS. 1 to 3, in the compound group of Table-1, the working fluid using each of the compounds A-1 to A-3 belonging to the compound (I) has a working speed. It is known that, in any of the electrode wear rate and the durability, the results show excellent results as compared with the target compounds C-1 and C-2. Example 2
An aqueous solution prepared by dissolving the compounds of Table-1 in pure water desalted with an ion exchange resin in advance was used as a working fluid, and wire cutting was performed under the following conditions.
使用機種：ソディック社製 330−Ｗ 加工電極：ワイヤFKH φ0.2mm 被加工物:SKD−11 20mm厚 加工条件：ワイヤ送り速度 5m/分 加工液抵抗値 ３×104Ω・cm 電圧 35V 電流 10A 結果は第４図に示される。図示の如く、表−１の化合物
群中、化合物（Ｉ）に属するＡ−１〜Ａ−３の各化合物
を用いた加工液は、対照化合物Ｃ−１又はＣ−２を用い
た対照液に比し卓越した加工速度を示すことが分る。Model: Sodick 330-W Machining electrode: Wire FKH φ0.2mm Workpiece: SKD-11 20mm thickness Machining condition: Wire feed speed 5m / min Machining liquid resistance value 3 × 10 4 Ωcm Voltage 35V Current 10A Results are shown in FIG. As shown in the figure, in the compound group of Table-1, the processing liquid using each of the compounds A-1 to A-3 belonging to the compound (I) is a control liquid using the control compound C-1 or C-2. It can be seen that the processing speed is outstanding in comparison.
（効果） 以上説明した如く、本発明に係る電気加工液は、電極消
耗率のみならず、加工速度及び耐久性において公知の水
性加工液に優越するので、金属加工技術の発展に大きく
寄与しうる。(Effect) As described above, the electromachining liquid according to the present invention is superior not only to the electrode wear rate but also to the known water-based machining liquid not only in the electrode wear rate but also in the machining speed and durability. .
第１図乃至第３図は、形彫加工について本発明加工液と
公知加工液を加工速度及び電極消耗率について対比した
グラフ、第４図は、ワイヤカット加工について本発明加
工液と公知加工液を加工速度について対比したグラフで
ある。なお、図中Ａ（−○−）で示される曲線は本願化
合物使用の場合を、またＣ（−●−）で示される曲線は
対照化合物使用の場合を示す。1 to 3 are graphs comparing the working fluid of the present invention and the known working fluid with respect to the machining speed and the electrode consumption rate for die cutting, and FIG. 4 is the working fluid of the present invention with the known working fluid for wire cutting. 2 is a graph comparing the processing speeds. In the figure, the curve indicated by A (-○-) shows the case of using the compound of the present invention, and the curve indicated by C (-●-) shows the case of using the control compound.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森 茂男 京都府京都市西京区桂千代原町35番地の１ 号 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeo Mori No. 1 at 35, Katsura Chiyohara-cho, Nishikyo-ku, Kyoto City, Kyoto Prefecture
Claims (2)
液。1. A water-soluble compound represented by the following general formula (I): An electromachining liquid which contains as an essential component.
％含む水溶液である特許請求の範囲第１項記載の電気加
工液。2. The compound according to claim 1 is added in an amount of 0.5 to 85.
%, The electromachining liquid according to claim 1 which is an aqueous solution.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7693586A JPH0716823B2 (en) | 1986-04-02 | 1986-04-02 | Electromachining liquid |
| DE8686114424T DE3666162D1 (en) | 1985-10-18 | 1986-10-17 | Electrical discharge machining medium |
| EP86114424A EP0221422B1 (en) | 1985-10-18 | 1986-10-17 | Electrical discharge machining medium |
| US06/920,085 US4767906A (en) | 1985-10-18 | 1986-10-17 | EDM water-based dielectric fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7693586A JPH0716823B2 (en) | 1986-04-02 | 1986-04-02 | Electromachining liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62236623A JPS62236623A (en) | 1987-10-16 |
| JPH0716823B2 true JPH0716823B2 (en) | 1995-03-01 |
Family
ID=13619583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7693586A Expired - Fee Related JPH0716823B2 (en) | 1985-10-18 | 1986-04-02 | Electromachining liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716823B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2510239B2 (en) * | 1988-04-08 | 1996-06-26 | 株式会社ジャパンエナジー | EDM composition |
| US5081333A (en) * | 1989-03-17 | 1992-01-14 | Mitsubishi Denki Kabushiki Kaisha | Electric discharge machining fluid with a fatty acid amide additive for rust inhibition |
-
1986
- 1986-04-02 JP JP7693586A patent/JPH0716823B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62236623A (en) | 1987-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |