JPS62173119A - Wire electric discharge machine - Google Patents

Wire electric discharge machine

Info

Publication number
JPS62173119A
JPS62173119A JP1368386A JP1368386A JPS62173119A JP S62173119 A JPS62173119 A JP S62173119A JP 1368386 A JP1368386 A JP 1368386A JP 1368386 A JP1368386 A JP 1368386A JP S62173119 A JPS62173119 A JP S62173119A
Authority
JP
Japan
Prior art keywords
wire electrode
wire
contactor
current
current supply
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
Application number
JP1368386A
Other languages
Japanese (ja)
Inventor
Gotaro Gamo
蒲生　剛太郎
Haruki Obara
小原　治樹
Hiroshi Kinoshita
博 木下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Priority to JP1368386A priority Critical patent/JPS62173119A/en
Priority to PCT/JP1987/000050 priority patent/WO1987004379A1/en
Publication of JPS62173119A publication Critical patent/JPS62173119A/en
Pending legal-status Critical Current

Links

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
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/08—Wire electrodes
    • B23H7/10—Supporting, winding or electrical connection of wire-electrode

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

PURPOSE:To eliminate risk of damaging electrodes by nipping each wire elec trode with a current supply contactor and a pressure member, holding the elec trode and contactor so that they do not separate in the event of discontinuity of the wire electrode, and thereby preventing generation of electric discharge between the contactor and wire electrode. CONSTITUTION:In the event of discontinuity of a wire electrode P during electric discharge processing, the tension applied to the wire electrode P eliminates, and it tends to deflect, but does not separate from a current supply contactor 10 because the wire electrode P is pressed and nipped by the contactor 10 and a bearing 19. Accordingly even a delay of shutoff of current supply to said contactor 10 because of output from a discontinuity sensing means for wire electrode P does not cause electric discharge between the wire electrode P and the current supply contactor 10, and therefore no damage is given to them. This eliminates risk of hooking of the wire electrode at the guide when the wire electrode is to be threaded to a guide, to facilitate automatic wire connec tion, and also, no damage is given to the current supply contactor, so that a long time service is made possible.

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装置に関し、特に、ワイヤ放電
加工装置のワイヤ電極へ通電する通電接触子に関連する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wire electrical discharge machining device, and particularly to a current-carrying contact for supplying current to a wire electrode of the wire electrical discharge machining device.

従来の技術 第４図は、従来のワイヤ放電加Ｉ　Ｈ置におけるワイヤ
電極への通電方式を示す要部説明図で、Ｆ〕はワイヤ電
極、Ｗは被加工物のワーク、１はライ１ン電極Ｐへ電力
を供給する通電接触子、２はワイＡ７電１Ｕ　Ｐを保持
しガイドするガイド、３．４はワイヤ電４４ｉＰをガイ
ドするガイドローラ、５はワイヤを供給するワイヤ供給
ボビン、６はワイ＼？電極Ｐが断線したとき、その断線
を検出するリミットスイッチであり、ワイヤ電極Ｐはワ
イヤ供給ボビン５からガイドローラ４．３でガイドされ
、通電接触子１と圧接し、ざらにガイド２でガイドされ
ワークＷ中を通り図示しない通電接触子、下ガイド及び
ガイドローラでガイドされてワイヤ巻取ボビンに巻き取
られるようになっている。ワイヤ電極Ｐは所定のテンシ
ョンをかけた状態で第４図で示ず例では上から下へ送行
しながら、通電接触子１とワークＷ間に電圧を印加する
ことによりワイヤ電＋４ｉ　ＰとワークＷ間に電圧を印
加してワイＡ？電１４ｉＰとワークＷ間に放電を生じせ
しめ、ワークＷを加工するものである。又、リミットス
イッチ６は、ワイヤ電極Ｐの断線を検出するもので、加
工中にワイヤ電極Ｐが断線すると、テンションがかけら
れていたワイヤ？Ｉｆｆ　４（ｘ　Ｐはたわみを生じる
が、そのたわみを検出し、ワイヤ電極Ｐの１１７ｉ線を
検出するものである。Conventional technology Fig. 4 is an explanatory diagram of the main parts showing the method of energizing the wire electrode in a conventional wire discharge IH system, where F] is the wire electrode, W is the workpiece, and 1 is the line 1 line. A current-carrying contactor that supplies power to the electrode P; 2 is a guide that holds and guides the wire A7 wire 1U P; 3.4 is a guide roller that guides the wire wire 44iP; 5 is a wire supply bobbin that supplies the wire; 6 is a Wai＼? This is a limit switch that detects the disconnection when the electrode P is disconnected. The wire passes through the workpiece W, is guided by a current-carrying contact, a lower guide, and a guide roller (not shown), and is wound onto a wire winding bobbin. The wire electrode P is fed under a predetermined tension from top to bottom in the example not shown in FIG. By applying a voltage between them? A discharge is generated between the electric current 14iP and the workpiece W to process the workpiece W. Further, the limit switch 6 is for detecting a break in the wire electrode P, and if the wire electrode P is broken during processing, the wire that was under tension will be removed. Iff 4(x P causes a deflection, but the deflection is detected and the 117i line of the wire electrode P is detected.

発明が解決しようとする問題点 上）ホしたような従来の／＋５［電加工装置において、
加］二時にワイヤ電極Ｐが断線したとき、テンションを
かけられて走行していたワイヤ電極Ｐは第４図破線で示
すように、テンションがかからないことによりたわみが
生じ通電接触子１から離れる。Problems to be Solved by the Invention) In the conventional /+5
When the wire electrode P breaks at two o'clock, the wire electrode P, which was running under tension, bends due to the lack of tension and separates from the current-carrying contact 1, as shown by the broken line in FIG.

一方、リミットスイッチ６はワイヤ？ｆｆ１ＵＰのたわ
みによりワイヤ電極］〕の断線を検出して、この信号に
よりワークＷと通電接触子１間の電圧印加をオフにする
が、リミットスイッチ６がワイヤ電極Ｐの断線を検出し
通電接触子１への通電をオフにするまで時間遅れがあり
、そのため、ワイヤ電極Ｐが通電接触子１から離れると
き通電接触子１とワイヤ電極１３間にｆｉｌ電が生じ、
この放電により、放電が生じたワイヤ電極Ｐの個所に凹
状の１具がつく。On the other hand, is limit switch 6 a wire? A break in the wire electrode] is detected by the deflection of ff1UP, and this signal turns off the voltage application between the workpiece W and the current-carrying contact 1.However, the limit switch 6 detects the break in the wire electrode P and turns off the current-carrying contact. There is a time delay until the energization to 1 is turned off, so when the wire electrode P separates from the energizing contact 1, a filtration occurs between the energizing contact 1 and the wire electrode 13,
Due to this discharge, a concave portion is formed at the location of the wire electrode P where the discharge occurred.

その結果、再麿ワイＶ電極Ｐを結線Ｊる場合、ワイヤ電
極間 電Ｉ４１ｉＰ上の傷かガイド２にひっかかり、通づこと
が難しく、特にワイヤ電極Ｐを自動送給するときなどは
、自動送給ができなくなる。As a result, when connecting the wire V electrode P, it is difficult to pass the wire because it gets caught in the guide 2 due to scratches on the wire electrode I41iP, and especially when the wire electrode P is automatically fed, I will not be able to pay my salary.

例えば、上記ガイド２がダイス状のものであると、ワイ
ヤ電極Ｐを通づダイス状ガイド２のクリアランスは５μ
〜１０μであるので、ワイヤ電極に上記のような傷がつ
くと該傷がガイド２に係合して通すことができなくなる
ものである。又、放電が生じると通電接触子１にも傷が
つぎ、通電接触子１の寿命を短くする。For example, if the guide 2 is dice-shaped, the clearance of the dice-shaped guide 2 through which the wire electrode P passes is 5μ.
~10μ, so if the wire electrode is scratched as described above, the scratch will engage the guide 2 and will not be able to pass through. Moreover, when discharge occurs, the current-carrying contact 1 is also damaged, which shortens the life of the current-carrying contact 1.

本発明は上記問題点を解決しようとするもので、ライ１
フ電極が判断したとき、ワイヤ電極と通電接触子間の放
電を防止しワイヤ電極及び通電接触子に爛をつけないよ
うにするものである。The present invention is an attempt to solve the above problems.
This prevents discharge between the wire electrode and the current-carrying contact and prevents the wire electrode and the current-carrying contact from becoming eroded.

問題点を解決するための手段 上記問題点を解決するために、本発明は、ワイヤ電極に
電力を供給する通電接触子に対し、ワイヤ電極を押圧す
る押圧部材を設けることにより上記間ｉ！１′１点を解
決した。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a pressing member for pressing the wire electrode on the current-carrying contact that supplies power to the wire electrode. 1'1 point resolved.

作　　用 ｆノイ曳７電（和は一］二足通電接触了と押圧部材によ
り挟持されているから、ワイヤ電極間 イヤ電１引が通電接触子と離れることはないので、通電
接触子とワイヤ電極間でｔＩｉ電が生じることらなくワ
イｒ電（参に傷がつくこともない。Action f Noi Hiki 7 Electric (Japanese is one) Since the wire is held between the two energized contacts and the pressing member, the wire between the electrodes and the energized contact will not be separated from the energized contact, so the energized contact and the wire There is no generation of tIi electricity between the electrodes, and there is no damage to the wire.

実施例 第１図は本発明の一実施例の片部の一部断面正面図、第
２図は第１図の右側面図、第３図は同実施例の押圧部ｌ
の要部断面図であり、１０はワイヤ電極Ｐに通電するた
めの取付板１６に固着された通電接触子、１１は取付板
１６に固着されたワイｉｙ　？ｆｆｌ極Ｐをガイドする
ガイド、１２は取付板１６に固着されたノズル、１３は
ワイヤ電極Ｐを通電接触子１０に押圧する押圧部材で、
該押圧部材１３は、上記取付板１６上のピン２０に揺動
自在に一端が相打されたレバー１４と、該レバー１４の
他端に回転自在に固るされたローラとしてのベアリング
１９、及び上記レバー１４を押圧し、上記ベアリング１
９を通電接触子１０に押圧しワイヤ電極Ｐを該通電接触
子間 １５で構成され、該板ばね１５は一端が取ト１仮１６に
固６され、他端が上記レバー１４を押圧している。Embodiment FIG. 1 is a partially sectional front view of a piece of an embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a pressing part l of the same embodiment.
10 is a current-carrying contact fixed to the mounting plate 16 for energizing the wire electrode P, and 11 is a wire fixed to the mounting plate 16. A guide for guiding the ffl pole P; 12 is a nozzle fixed to the mounting plate 16; 13 is a pressing member for pressing the wire electrode P against the current-carrying contact 10;
The pressing member 13 includes a lever 14 whose one end is swingably hitched to a pin 20 on the mounting plate 16, a bearing 19 as a roller rotatably fixed to the other end of the lever 14, and Press the lever 14 and press the bearing 1.
9 is pressed against the current-carrying contact 10, and a wire electrode P is formed between the current-carrying contacts 15. One end of the plate spring 15 is fixed to the handle 1 temporary 16, and the other end is pressed against the lever 14. There is.

第３図に示づように、ローラとしてのベアリング１９は
レバー１４の先端に固着されたシ１？ノド・１９に絶縁
ブツシュ１８を介して固着されている。As shown in FIG. 3, a bearing 19 as a roller is fixed to the tip of the lever 14. It is fixed to the throat 19 via an insulating bushing 18.

この絶縁ブツシュ１８を介して固着ザることは、ワイヤ
電１４　Ｐに通電１６場合、通常取ｆＪ根１６゜通電接
触子１０を同電位にすることから、ローラとしてのベア
リング１９を介してワイヤ電極Ｐに電流が流れることを
防止するためのもので、ベアリング１９に電流が流れる
とベアリング１９のノｔのが短くなることから絶縁プッ
シュト８により絶縁したちので、レバー１４を絶縁材で
構成したり、他の個所で絶縁しベアリング１９に電流が
流れないようにすればよく、必ずしもシャフト・１７と
ベアリング１９聞に絶縁ブツシュ１８を設けて絶縁しな
くてしよい。This fixation through the insulating bushing 18 means that when the wire electrode 14P is energized, the wire electrode 14P is normally held at the same potential as the current-carrying contact 10 through the bearing 19 as a roller. This is to prevent current from flowing through the bearing 19, and since the knot of the bearing 19 will be shortened when a current flows through the bearing 19, it is insulated by the insulating pushbutton 8, so the lever 14 is made of an insulating material. , it is sufficient to insulate other parts to prevent current from flowing to the bearing 19, and it is not necessarily necessary to provide an insulating bush 18 between the shaft 17 and the bearing 19 for insulation.

本実施例は以上のような構成になっているので、板ばね
１５は常時レバー１４を押圧し該レバー１４をピン２０
を中心に第１図中時計方向に付勢し、レバー１４の先端
に固着されたベアリング１９を通′ｉｉ接触了１０に押
圧し、ワイヤＴ１１Ｐを通電接触子１０に押圧している
。Since this embodiment has the above-described configuration, the leaf spring 15 always presses the lever 14 and pushes the lever 14 toward the pin 20.
The bearing 19 fixed to the tip of the lever 14 is pressed clockwise in FIG.

放電加工時には、取付板１６及び通電接触子１０を介し
でワイヤ電極Ｐに通電されるが、その放電加工時におい
てワイヤ電極Ｐが断線したとき、ワイーｙＭ極Ｐにかけ
られていたテンシ＝＋ンがなくなり、ワイヤ電！ｉ　Ｐ
はたわもうとするが、ワイヤ電極Ｐは通電接触子１０と
ベアリング１９′Ｃ−押圧挾持されているからワイヤ電
極Ｐと通電接触子１０は離反せず、そのため、ワイヤ電
極１つの断線検出手段からの出力により通電接触子１０
への通電がオフになることが遅れても、ワイヤ電極Ｐと
通電接触子１０間に放電が生じることはなく、ワイヤ電
極Ｐ及び通電接触子が傷つけられることはない。During electric discharge machining, the wire electrode P is energized through the mounting plate 16 and the current-carrying contact 10, but when the wire electrode P is disconnected during electric discharge machining, the tension applied to the wire M pole P is Gone, wire electricity! iP
However, since the wire electrode P is pressed between the current-carrying contact 10 and the bearing 19'C, the wire electrode P and the current-carrying contact 10 do not separate from each other. The energizing contact 10 is activated by the output from
Even if there is a delay in turning off the energization, discharge will not occur between the wire electrode P and the current-carrying contact 10, and the wire electrode P and the current-carrying contact will not be damaged.

なお、通電接触子１０と取付板１６聞を絶縁し、通電接
触子１０に直接電力を供給するようにすれば、必ずしも
ベアリング１９とシＶフト１７間に絶縁ブツシュ１８を
入れる必要もない。又、ワイヤ電ＩＰを通電接触子１０
に押圧するベアリング１９は、回転自在のローうでもよ
く、ざらには、板ばねのようなもので押圧部材を構成し
直接ワイヤ電極］〕を通電接触子１０に押圧するように
してもよい。しかし、この場合、押圧部材がワイヤ電極
の走行と共に回転しないから、効果は同じであるが、該
押圧部材とワイＡν電極Ｐ間のＦｊ　１１！が大さくな
るという欠点がある。Note that if the current-carrying contact 10 and the mounting plate 16 are insulated and power is directly supplied to the current-carrying contact 10, it is not necessarily necessary to insert the insulating bush 18 between the bearing 19 and the shaft 17. In addition, the wire electric IP is connected to the current-carrying contact 10.
The bearing 19 that presses the wire electrode may be a rotatable rod, or it may be a plate spring or the like that constitutes a pressing member and presses the wire electrode directly against the current-carrying contact 10. However, in this case, since the pressing member does not rotate with the movement of the wire electrode, the effect is the same, but Fj 11! between the pressing member and the wire Aν electrode P. The disadvantage is that it becomes large.

さらに、押圧部材の通電接触子１０にワイヤ電極Ｐを押
圧するローラをワイヤ電極Ｆ〕の走行方向には回転し、
逆方向には回転しないようなワンウェイクラッチや、該
Ｃ１−ラをＩｉｇ着した回転軸につめ車を固着し、ワイ
ヤ電極Ｐの走行方向には該ローラを回転自在とし、逆方
向にはつめによってつ゛め車をロックして回転しないよ
うにしてもよい。Furthermore, the roller that presses the wire electrode P against the current-carrying contact 10 of the pressing member is rotated in the running direction of the wire electrode F],
A one-way clutch that does not rotate in the opposite direction or a ratchet wheel is fixed to the rotating shaft to which the C1-ra is attached, and the roller is rotatable in the running direction of the wire electrode P, and by the pawl in the opposite direction. The pawl wheel may be locked to prevent it from rotating.

このように１れば、ワイヤ電極Ｐの切断時にワイψＴ１
極Ｐがはねあがることを防止でき、ワイヤ電極［〕が通
電接触子、押圧部材間を抜けることはない。If it is 1 in this way, the wire ψT1 when cutting the wire electrode P
The pole P can be prevented from springing up, and the wire electrode [ ] will not fall out between the current-carrying contact and the pressing member.

発明の効果 以上ｊボベたＪ：うに、本発明は、ワイヤ電極が放電加
工中に切断してｂワイヤ電極が通電接触子から離れるこ
とはないから、ワイヤ電極と通電接触子間に放ｉ、Ｔｆ
が生じることはなく、そのｌζめワイヤ電極及び通電接
触子に放電による傷がつくことはないため、ワイヤ電極
を再びガイドに通ずとぎワイヤ電極がガイドにひっかか
ることはなくワイヤの自動結線が容易に行え得る。又、
通電接触子にも１０がつかないから、長時間の使用を可
能とする。More than Effects of the Invention The present invention prevents the wire electrode from separating from the current-carrying contact due to breakage during electrical discharge machining, so that there is no discharge between the wire electrode and the current-carrying contact. Tf
This prevents the wire electrode and current-carrying contact from being damaged by discharge, so the wire electrode can be passed through the guide again and the wire electrode will not get caught in the guide, making it easy to wire the wire automatically. It can be done. or,
Since 10 is not attached to the current-carrying contact, it can be used for a long time.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例の要部一部断面正面図、第２
図は第１図右側面図、第３図は同実施例における押圧部
材の要部断面口、第４図は従来の放電加工装置における
ワイヤ電極への通電方式を示す要部説明図である。 １．１０・・・通電接触子、２．１１・・・ガイド、６
・・・リミットスイッチ、１３・・・押圧部材、１４・
・・レバー、１５・・・板ばね、１６・・・取付板、１
７・・・シャフト、１８・・・絶縁ブツシュ、１９・・
・ベアリング。 第１図　　　第２図 第３図 第４図FIG. 1 is a partially sectional front view of the main part of an embodiment of the present invention, and FIG.
The drawings are a right side view of FIG. 1, FIG. 3 is a sectional view of a main part of a pressing member in the same embodiment, and FIG. 4 is an explanatory diagram of a main part showing a method of supplying current to a wire electrode in a conventional electrical discharge machining apparatus. 1.10... Current-carrying contact, 2.11... Guide, 6
...Limit switch, 13...Press member, 14.
... Lever, 15 ... Leaf spring, 16 ... Mounting plate, 1
7...Shaft, 18...Insulating bushing, 19...
·bearing. Figure 1 Figure 2 Figure 3 Figure 4

Claims (5)

【特許請求の範囲】[Claims] （１）ワイヤ放電加工装置において、ワイヤ電極に電力
を供給する通電接触子に対し、ワイヤ電極を押圧する押
圧部材を設けたことを特徴とするワイヤ放電加工装置。(1) A wire electrical discharge machining apparatus, characterized in that a pressing member for pressing the wire electrode is provided on a current-carrying contact that supplies power to the wire electrode. （２）上記押圧部材は回転自在のローラで構成されてい
る特許請求の範囲第１項記載のワイヤ放電加工装置。(2) The wire electrical discharge machining apparatus according to claim 1, wherein the pressing member is constituted by a rotatable roller. （３）上記押圧部材はワイヤ電極の送り方向にのみ回転
可能なローラで構成されている特許請求の範囲第１項記
載のワイヤ放電加工装置。(3) The wire electrical discharge machining apparatus according to claim 1, wherein the pressing member is constituted by a roller that can rotate only in the feeding direction of the wire electrode. （４）上記押圧部材は他の部材と絶縁部材で絶縁されて
いる特許請求の範囲第１項、第２項、又は第３項記載の
ワイヤ放電加工装置。(4) The wire electrical discharge machining apparatus according to claim 1, 2, or 3, wherein the pressing member is insulated from other members by an insulating member. （５）上記押圧部材は取付板に揺動自在に一端が枢着さ
れ、他端にローラが固着されたレバーと、該レバーを押
圧し上記ローラを通電接触子に押圧する板ばねによって
構成されている特許請求の範囲第１項、第２項、第３項
、又は第４項記載のワイヤ放電加工装置。(5) The pressing member is comprised of a lever whose one end is pivotally attached to the mounting plate so as to be able to swing freely, and a roller is fixed to the other end, and a leaf spring which presses the lever and presses the roller against the current-carrying contact. A wire electrical discharge machining apparatus according to claim 1, 2, 3, or 4.
JP1368386A 1986-01-27 1986-01-27 Wire electric discharge machine Pending JPS62173119A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1368386A JPS62173119A (en) 1986-01-27 1986-01-27 Wire electric discharge machine
PCT/JP1987/000050 WO1987004379A1 (en) 1986-01-27 1987-01-26 Wire-cut electric spark machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1368386A JPS62173119A (en) 1986-01-27 1986-01-27 Wire electric discharge machine

Publications (1)

Publication Number Publication Date
JPS62173119A true JPS62173119A (en) 1987-07-30

Family

ID=11839981

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1368386A Pending JPS62173119A (en) 1986-01-27 1986-01-27 Wire electric discharge machine

Country Status (2)

Country Link
JP (1) JPS62173119A (en)
WO (1) WO1987004379A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1216025B (en) * 1988-03-08 1990-02-22 Jeabor S A APPARATUS SUITABLE TO OPERATE, IN AN ALMOST INSTANT WAY, THE COMPLETE DESTRUCTION OF THE SYRINGE NEEDLE BY INJECTION, IMMEDIATELY AFTER THEIR USE.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2067946B (en) * 1980-02-14 1984-08-08 Inoue Japax Res Electrode holder-guidance assembly for wire-cut electrical machining
JPS5761421A (en) * 1980-09-30 1982-04-13 Mitsubishi Electric Corp Wire feeder for wire cut discharge worker
JPS5761422A (en) * 1981-07-30 1982-04-13 Mitsubishi Electric Corp Spark erosion machine with cutting wire
JPS5962933U (en) * 1982-10-18 1984-04-25 吉江　勝廣 Wire cut electric discharge machining tool

Also Published As

Publication number Publication date
WO1987004379A1 (en) 1987-07-30

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