JPH0440127B2 - - Google Patents
Info
- Publication number
- JPH0440127B2 JPH0440127B2 JP60006978A JP697885A JPH0440127B2 JP H0440127 B2 JPH0440127 B2 JP H0440127B2 JP 60006978 A JP60006978 A JP 60006978A JP 697885 A JP697885 A JP 697885A JP H0440127 B2 JPH0440127 B2 JP H0440127B2
- Authority
- JP
- Japan
- Prior art keywords
- wire electrode
- thin wire
- guide
- hole
- fluid
- 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 - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims description 21
- 238000003754 machining Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 6
- 238000005553 drilling Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 235000010419 agar Nutrition 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/14—Making holes
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は細線の中実、パイプ状電極を用いて放
電加工により細穴加工する際に、該細線電極をそ
の軸線方向に案内するガイド装置に関する。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a guide device for guiding a thin wire electrode in the axial direction when drilling a small hole by electric discharge machining using a thin wire solid or pipe-shaped electrode. .
細線電極を用い、該電極を軸中心に高速回転さ
せると共に被加工体と対向する方向に加工送りを
与え、加工間隙に加工液を供給すると共にパルス
放電を繰返して加工する細穴放電加工は公知であ
る。しかし加工穴径が0.1〜0.2mmφ程度になる
と、その加工電極の線径はそれ以下の極細線とな
るから、この電極支持は極めて難しくなり、機械
的なガイドは安定した円滑ガイドは不可能であ
る。電極に振れが出て短絡、アークを発生し安定
放電加工が妨害され、又、加工穴に曲りを生じ精
度が低下するといつた欠点があつた。
Small hole electric discharge machining is well known, in which a thin wire electrode is used, the electrode is rotated at high speed around an axis, machining feed is applied in a direction facing the workpiece, machining liquid is supplied to the machining gap, and pulsed discharge is repeated. It is. However, when the diameter of the machined hole becomes approximately 0.1 to 0.2 mmφ, the wire diameter of the machined electrode becomes extremely thin, making it extremely difficult to support this electrode, and mechanical guides are unable to provide stable and smooth guidance. be. There were drawbacks such as deflection of the electrode, which caused short circuits and arcs, which interfered with stable electrical discharge machining, and also caused bends in the machined hole, reducing accuracy.
本発明は、このような欠点を解消することを目
的とする。そして、この目的を達成するため、本
発明の細線電極ガイド装置は、細線電極が案内さ
れる直線円筒状貫通孔の一部に両端の開口部より
も内径の大きい円筒状空間部を有する細線電極ガ
イドと、該細線電極ガイドを前記貫通孔の軸線を
中心として回転させるガイド回転装置と、前記細
線電極ガイドの円筒状空間部に動粘性率の高い流
体を供給する手段と、前記細線電極ガイドの直線
円筒状貫通孔に該貫通孔と同軸状に挿通される細
線電極を前記貫通孔の軸線を中心として回転させ
る細線電極回転装置とを具備し、前記両回転装置
により前記細線電極ガイドと細線電極が逆方向に
回転さることを特徴とする。
The present invention aims to eliminate such drawbacks. In order to achieve this object, the thin wire electrode guide device of the present invention provides a thin wire electrode that has a cylindrical space having a larger inner diameter than the openings at both ends in a part of the straight cylindrical through hole in which the thin wire electrode is guided. a guide, a guide rotation device for rotating the thin wire electrode guide around the axis of the through hole, means for supplying a fluid with high kinematic viscosity to a cylindrical space of the thin wire electrode guide, and a guide rotating device for rotating the thin wire electrode guide around the axis of the through hole; a thin wire electrode rotation device that rotates a thin wire electrode inserted into a straight cylindrical through hole coaxially with the through hole, and the thin wire electrode rotating device rotates the thin wire electrode guide and the thin wire electrode by the two rotating devices. is characterized by rotating in the opposite direction.
本発明は前記欠点を除去するためになされたも
ので、電極を案内するガイドに、細線電極を囲繞
する凹部を形成し、該凹部に動粘性率の高い流体
を供給し、且つ前記細線電極とガイド間に相対回
転運動を与える回転装置を設けたものである。 The present invention has been made in order to eliminate the above-mentioned drawbacks, and includes forming a recess surrounding the thin wire electrode in a guide for guiding the electrode, supplying a fluid with a high kinematic viscosity to the recess, and connecting the thin wire electrode to the recess. A rotating device is provided to provide relative rotational movement between the guides.
以下図面の一実施例により本発明を説明する。 The present invention will be explained below with reference to an embodiment of the drawings.
１は細線電極で、リール２に巻回貯蔵してあ
り、加工に応じて供給する。３はブレーキ、４は
加工送りローラ、５は線電極１を案内するガイド
で、細線電極が案内される直線円筒状貫通孔の一
部に両端の開口部よりも内径の大きい円筒状空間
部５ａを形成し、ここに動粘性率の高い流体６を
供給する。ガイド５は固定部本体７にベアリング
支持され、線電極軸を中心に回転自在に支承され
ている。８がその回転モータで、歯車９を係合さ
せて回転を与える。１０は前記リール２、ブレー
キ３、送りローラ４等を支持するフレームで、ガ
イド５に回転自在にベアリング支持され、外周に
プーリ１１が固定され、これにベルト１２を掛け
て回転させる。１３がその回転モータ、１４は動
粘性率の高い流体６の供給ポンプで、本体の供給
孔７ａ及び連通するガイドの供給孔５ｂを通して
円筒状空間部５ａに圧入供給する。１５は加工部
に加工液を供給するノズルで、ポンプ１６により
加工液が供給される。１７は穴明加工する被加工
体で、加工台１８に固定して設けられる。１９は
加工用パルス電源で、加工台からら被加工体１７
に、他方は通電子２０を通して線電源１に通電さ
れる。 Reference numeral 1 denotes a thin wire electrode, which is wound and stored on a reel 2, and is supplied according to processing. 3 is a brake, 4 is a processing feed roller, 5 is a guide for guiding the wire electrode 1, and a part of the straight cylindrical through hole through which the thin wire electrode is guided has a cylindrical space 5a having an inner diameter larger than the openings at both ends. A fluid 6 having a high kinematic viscosity is supplied thereto. The guide 5 is supported by a bearing on the fixed part main body 7 and is rotatably supported around the wire electrode axis. Reference numeral 8 denotes the rotation motor, which engages the gear 9 to provide rotation. Reference numeral 10 denotes a frame that supports the reel 2, brake 3, feed roller 4, etc., and is rotatably supported by bearings on the guide 5. A pulley 11 is fixed to the outer periphery of the frame, and a belt 12 is applied to the frame for rotation. Reference numeral 13 denotes a rotary motor thereof, and reference numeral 14 denotes a supply pump for supplying the fluid 6 having a high kinematic viscosity, which is press-fitted and supplied to the cylindrical space 5a through the supply hole 7a of the main body and the supply hole 5b of the communicating guide. 15 is a nozzle for supplying machining fluid to the machining section, and the machining fluid is supplied by a pump 16. Reference numeral 17 denotes a workpiece to be drilled, which is fixedly provided on a processing table 18. 19 is a pulse power source for processing, and the workpiece 17 is connected from the processing table to the processing table.
On the other hand, the other one is energized to the line power source 1 through the conductor 20.
以上に於て、リール２から供給された線電極１
はブレーキ３と加工送りローラ４に張力が掛けら
れ巻癖が除かれ直線に案内される。ガイド５に於
ては、流体６により摩擦なく安定ガイドされ、ガ
イド先端より突出する細線電極１によつて被加工
体１７が加工される。加工中、ガイド５を通り被
加工体１７と対向する電極線１は、モータ１３に
よりフレーム１０が回転することにより軸中心に
自転を行なう。又、モータ８を回転することによ
つてガイド５が回転する。そして、ガイド５と細
線電極１の回転運動が逆方向に行なわれる。この
線電極１とガイド５との相対回転運動によつて間
に介在する動粘性率の高い流体６と線電極１とは
相対的に摩擦し接触抵抗を高め、回転速度が増す
のに比例して抵抗が高まり線電極１は周りの媒体
から求心的動圧制御を受け、且つ線電極１自体は
抵抗が少なくなるよう求心作用が動き、従つて自
然に回転中心に向かいそこに保持されるようにな
る。これにより線電極は横振れ、撓み、振動等が
防止され、真直ぐに安定にガイドされる。
In the above, the wire electrode 1 supplied from the reel 2
Tension is applied to the brake 3 and processing feed roller 4 to remove curling and guide the material in a straight line. In the guide 5, the workpiece 17 is stably guided without friction by the fluid 6, and the workpiece 17 is processed by the thin wire electrode 1 protruding from the tip of the guide. During processing, the electrode wire 1 passing through the guide 5 and facing the workpiece 17 rotates around its axis as the frame 10 is rotated by the motor 13. Further, by rotating the motor 8, the guide 5 is rotated. Then, the guide 5 and the thin wire electrode 1 rotate in opposite directions. This relative rotational movement between the wire electrode 1 and the guide 5 causes relative friction between the wire electrode 1 and the fluid 6 with a high kinematic viscosity interposed between them, increasing contact resistance, which increases in proportion to the increase in rotational speed. The resistance increases and the wire electrode 1 receives centripetal dynamic pressure control from the surrounding medium, and the centripetal action moves so that the resistance of the wire electrode 1 itself decreases, so that it naturally moves toward the center of rotation and is held there. become. This prevents the wire electrode from lateral wobbling, bending, vibration, etc., and guides it straight and stably.
ポンプ１４からガイドに供給する動粘性率の高
い流体６には、動粘性率が３〜500cSt程度のもの
を利用する。 The fluid 6 with a high kinematic viscosity supplied from the pump 14 to the guide is one with a kinematic viscosity of about 3 to 500 cSt.
線電極１が細い場合、それに対応して粘性の高
い流体を用いる。例えば、水、油、炭化水素等の
ベースに表面活性剤、ポリエチレングリコール、
ポリビニールアルコール、グリセリン、ゼラチ
ン、カンテン、パラフイン、ナフテン、芳香族等
の増粘剤を混合することにより粘性を高める。
又、グラフアイト、Co、Ni、その他の金属、合
金の微粒子、合成樹脂、セラミツクスの微粒子
で、粒径10-2mmφ〜10-5mmφ程度の微粒子を液中
に混合して利用することもできる。又、液中混合
物としては微粒子の他、金属、カーボン、樹脂の
フアイバー、ウイスカー等も利用できる。金属を
用いた時はここから線電極１への加工電流の通電
を可能とする。 If the wire electrode 1 is thin, a fluid with a correspondingly high viscosity is used. For example, a surfactant, polyethylene glycol, etc. based on water, oil, hydrocarbon, etc.
The viscosity is increased by mixing thickeners such as polyvinyl alcohol, glycerin, gelatin, agar, paraffin, naphthene, and aromatics.
In addition, fine particles of graphite, Co, Ni, other metals, alloys, synthetic resins, and ceramics, with a particle size of about 10 -2 mmφ to 10 -5 mmφ, can be mixed into the liquid and used. can. In addition to fine particles, metal, carbon, resin fibers, whiskers, etc. can also be used as the mixture in the liquid. When metal is used, processing current can be passed from here to the wire electrode 1.
このような動粘性率の高い流体をガイド５に供
給介在させることによつて、供給圧力を高めるこ
とによつて更に有効であるが、この動粘性率の高
い液体によつて線電極１が安定して中心にガイド
され、振れ等がないからガイド５から突出する電
極先端によつて被加工体１７の穴明け加工が安定
放電により高速度で行なわれる。 It is more effective to increase the supply pressure by supplying such a fluid with a high kinematic viscosity to the guide 5, but this liquid with a high kinematic viscosity stabilizes the wire electrode 1. Since the electrode tip protrudes from the guide 5 and is guided centrally and there is no deflection, drilling of the workpiece 17 is performed at high speed by stable electric discharge.
ガイドに供給する動粘性率の高い流体にグラフ
アイト3wt％、パラフイン48.8wt％、ナフテン
34.6wt％、残部が芳香族炭化水素の混合体を用
い、線電極に直径10μφのMo線を用い、ガイドを
1200RPMで回転し、線電極をガイドと逆方向に
300RPMで回転させ、加工パルスをIp＝11A、
τon＝400nsのパルス条件で、板厚1.6mmの鉄材に
穴明け加工したとき、穴径が約34μφの貫通穴が
約20分で加工できた。
Graphite 3wt%, paraffin 48.8wt%, and naphthene are used as the fluid with high kinematic viscosity supplied to the guide.
A mixture of 34.6wt% and the remainder being aromatic hydrocarbons was used, a Mo wire with a diameter of 10μφ was used as the wire electrode, and the guide was
Rotate at 1200RPM and move the wire electrode in the opposite direction to the guide.
Rotate at 300RPM, machining pulse Ip=11A,
When drilling a hole in a steel material with a thickness of 1.6 mm under pulse conditions of τon = 400 ns, a through hole with a hole diameter of approximately 34 μφ could be drilled in approximately 20 minutes.
線電極は中実線を用いる場合に限らず、細いパ
イプを用いることができ、加工液をこのパイプ電
極から噴流供給することができる。又、加工液に
は水、ケロシン等を使用するが、これに増粘剤を
混合してガイドに供給し、ガイドを流動して先端
より加工部に供給して加工液を兼ねさせることが
できる。この場合には加工部間〓に於ても回転す
る線電極間に動粘性率の高い流体の作用によつて
動圧求心力を作用して中心保持が期待できる。 The wire electrode is not limited to the case where a solid wire is used, but a thin pipe can be used, and the machining liquid can be supplied in a jet form from this pipe electrode. In addition, water, kerosene, etc. are used as machining fluid, and a thickener can be mixed with this and supplied to the guide, allowing it to flow through the guide and being supplied from the tip to the machining section, thereby serving as the machining fluid as well. . In this case, centering can be expected between the machining parts by exerting a dynamic pressure centripetal force between the rotating wire electrodes due to the action of the fluid with high kinematic viscosity.
以上述べた通り、本発明によれば、細線電極が
案内される直線円筒状貫通孔の一部に両端の開口
部より内径の大きい円筒状空間部を形成し、この
空間部に動粘性率の高い流体を充満させると共
に、細線電極を前記直線円筒状貫通孔に同軸状に
挿通させた状態で、細線電極とガイドとをその軸
線を中心として互いに逆方向に回転させることに
より、細線電極に付与する回転速度を従来より遅
くしても、細線電極に対して流体との接触抵抗に
よる求心作用が働いて、細線電極が回転中心に保
持されるようになり、又細線電極の回転速度を従
来よりも遅く設定できることから、細線電極の横
振れ、撓み、振動等を防止して、細線電極を直線
状に安定してガイドすることができるため、穴明
け加工精度が向上すると共に、曲りなく真直ぐに
加工し得る加工穴の深さ（長さ）を増大させるこ
とができ、又、安定してガイドし得る細線電極の
線径を小さくすることができる。
As described above, according to the present invention, a cylindrical space having an inner diameter larger than the openings at both ends is formed in a part of the straight cylindrical through hole through which the thin wire electrode is guided, and the kinematic viscosity is controlled in this space. The thin wire electrode is filled with a high fluid and the thin wire electrode is coaxially inserted into the linear cylindrical through hole, and the thin wire electrode and the guide are rotated in opposite directions about their axes to apply the fluid to the thin wire electrode. Even if the rotation speed of the thin wire electrode is slower than before, the centripetal action of the contact resistance with the fluid acts on the thin wire electrode, and the thin wire electrode is held at the center of rotation. Since it can be set slowly, it is possible to prevent the thin wire electrode from lateral wobbling, bending, vibration, etc., and to stably guide the thin wire electrode in a straight line, improving drilling accuracy and making it straight without bending. The depth (length) of the hole that can be machined can be increased, and the wire diameter of the thin wire electrode that can be stably guided can be reduced.
又、本発明によれば、細線電極とガイドの各回
転運動が逆方向に行なわれることにより、細線電
極と流体との相対速度を前述の如く容易に高める
ことができて、細線電極に対する求心作用を強く
働かせることができ、又、細線電極の回転速度を
低く設定できることから、細線電極の振れや、撓
みが減じ、極細線であつても安定した円滑なガイ
ドを行なうことができるため、従来では困難であ
つた極小径の精密穴明け加工も精度良く行なうこ
とができる。 Further, according to the present invention, since the rotational movements of the thin wire electrode and the guide are performed in opposite directions, the relative speed between the thin wire electrode and the fluid can be easily increased as described above, and the centripetal action on the thin wire electrode can be increased. In addition, since the rotation speed of the thin wire electrode can be set low, the deflection and deflection of the thin wire electrode are reduced, and stable and smooth guidance can be achieved even with extremely thin wires, which is faster than conventional methods. Precision drilling of extremely small diameter holes, which has been difficult, can be performed with high precision.
図面は本発明の一実施例構成図である。
１……線電極、４……送りローラ、５……ガイ
ド、６……動粘性率の高い流体、８……ガイド回
転用モータ、１３……線電極回転用モータ、１５
……加工液供給ノズル、１７……被加工体、１９
……加工パルス電源。
The drawing is a configuration diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Line electrode, 4... Feed roller, 5... Guide, 6... Fluid with high kinematic viscosity, 8... Guide rotation motor, 13... Line electrode rotation motor, 15
... Processing liquid supply nozzle, 17 ... Workpiece, 19
...Processing pulse power supply.
Claims (1)
部に両端の開口部よりも内径の大きい円筒状空間
部を有する細線電極ガイドと、該細線電極ガイド
を前記貫通孔の軸線を中心として回転させるガイ
ド回転装置と、前記細線電極ガイドの円筒状空間
部に動粘性率の高い流体を供給する手段と、前記
細線電極ガイドの直線円筒状貫通孔に該貫通孔と
同軸状に挿通される細線電極を前記貫通孔の軸線
を中心として回転させる細線電極回転装置とを具
備し、前記両回転装置により前記細線電極ガイド
と細線電極が逆方向に回転されることを特徴とす
る細線電極ガイド装置。1. A thin wire electrode guide having a cylindrical space having a larger inner diameter than the openings at both ends in a part of a straight cylindrical through hole in which the thin wire electrode is guided, and rotating the thin wire electrode guide around the axis of the through hole. means for supplying a fluid with high kinematic viscosity into the cylindrical space of the thin wire electrode guide; and a thin wire inserted into a straight cylindrical through hole of the thin wire electrode guide coaxially with the through hole. A thin wire electrode guide device, comprising: a thin wire electrode rotating device that rotates the electrode around the axis of the through hole, and the thin wire electrode guide and the thin wire electrode are rotated in opposite directions by both rotating devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP697885A JPS61164731A (en) | 1985-01-17 | 1985-01-17 | Fine hole electric discharge machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP697885A JPS61164731A (en) | 1985-01-17 | 1985-01-17 | Fine hole electric discharge machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61164731A JPS61164731A (en) | 1986-07-25 |
| JPH0440127B2 true JPH0440127B2 (en) | 1992-07-01 |
Family
ID=11653279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP697885A Granted JPS61164731A (en) | 1985-01-17 | 1985-01-17 | Fine hole electric discharge machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61164731A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0673779B2 (en) * | 1987-12-17 | 1994-09-21 | 三菱電機株式会社 | Small hole electrical discharge machine |
| WO1991007246A1 (en) * | 1989-11-22 | 1991-05-30 | Sodick Co., Ltd. | Electrode holder for discharge machining |
| JP3241780B2 (en) * | 1991-12-17 | 2001-12-25 | 株式会社ソディック | Pore electric discharge machine |
| CN1099336C (en) * | 2000-04-14 | 2003-01-22 | 清华大学 | Electrospark equipment for machining precise fine holes |
| JP4593479B2 (en) * | 2004-01-23 | 2010-12-08 | 三菱電機株式会社 | EDM machine |
| JP6211448B2 (en) * | 2014-03-25 | 2017-10-11 | Ｊｘｔｇエネルギー株式会社 | Electrical discharge machining oil composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841976A (en) * | 1981-08-31 | 1983-03-11 | 荻野 初太郎 | Waterproof sheet |
-
1985
- 1985-01-17 JP JP697885A patent/JPS61164731A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841976A (en) * | 1981-08-31 | 1983-03-11 | 荻野 初太郎 | Waterproof sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61164731A (en) | 1986-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |