JPS61288924A

JPS61288924A - Electric discharge machine

Info

Publication number: JPS61288924A
Application number: JP12863385A
Authority: JP
Inventors: Kiyoshi Inoue; 潔井上
Original assignee: Inoue Japax Research Inc
Current assignee: Inoue Japax Research Inc
Priority date: 1985-06-13
Filing date: 1985-06-13
Publication date: 1986-12-19

Abstract

PURPOSE:To improve the machining accuracy while to increase the machining speed thus to enable from rough to finish work by employing such tool electrode where long electrode such as wire will travel over a guide having plural projections thereby substantially eliminating consumption of electrode. CONSTITUTION:Threaded shaft 6 is controlled through a motor 7 to move a guide 1 while to rotate a work 5 through a motor 9. Movement of guide 1 is detected through an encoder 10 whole rotation of work 5 is detected through an encoder 11. Signals detected through the encoders 10, 11 are provided to control circuit 12 and compared to produce a control signal such that the projections 1a, 1b, 1c of the guide 1 will move just one pitch upon single rotation of work 5 thus to control the motors 7, 9. In such a manner, driving of guide 1 and work 5 is controlled to produce discharge in the gap between the wire electrode 2 moving over the projections 1a-1c and the work 5 thus to machine the work 5. Consequently, the electrode 2 is renewed with predetermined speed resulting in highly accurate machining of precise screw with substantially no consumption.

Description

【発明の詳細な説明】〔発明の技術分野〕本発明は突起ガイドにワイヤ、テープ等を移動走行させ
て電極加工面を形成した工具を用いて放電加工する装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for electrical discharge machining using a tool having an electrode machining surface formed by moving a wire, tape, etc. on a protrusion guide.

〔従来技術及び問題点〕[Prior art and problems]

従来のバイト等の刃物工具を用い、これを被加工体に対
向して相対移動させて機械的に切削する旋盤等に於ては
、加工中゛バイトが消耗し摩耗し切削力が低下したり加
工精度が低下する欠点があった。又、機械切削であるか
ら刃物よ６硬い材料の切削ができず、超硬合金、焼入鋼
等の加工が不可能であった。In lathes, etc., which use cutting tools such as conventional bits and move them relative to the workpiece to mechanically cut, the cutting tool wears out and wears out during machining, resulting in a decrease in cutting force. There was a drawback that processing accuracy decreased. In addition, since it is a mechanical cutting method, it is not possible to cut materials as hard as a knife, and it is impossible to process cemented carbide, hardened steel, etc.

〔問題点の解決手段〕[Means for solving problems]

本発明は前記従来の欠点を改良するためになされたもの
で、工具電極として、１つ若しくは複数の突起を有する
ガイドにワイヤ、テープ等の長尺電極を移動走行させて
電極加工面とした実質消耗の無い工具を用い、これを被
加工体と対向する方向と直交する１軸に送りを与える第
１の送り装置と、前記被加工体を前記工具電極の送り軸
と直交する方向に送りを与える第２の送り装置とを設け
、この両送り装置による送り量を各々検出する検出装置
と、該検出装置の検出信号を比較し所定の関係に関連し
て前記両送り装置を制御する制御装置を設け、工具電極
と被加工体間に加工液を供給し加工パルスを加えて放電
加工するようにしたことを特徴とする。The present invention has been made in order to improve the above-mentioned drawbacks of the conventional methods, and is used as a tool electrode by moving and running a long electrode such as a wire or tape on a guide having one or more protrusions. A first feeding device that uses a non-consumable tool and feeds the tool in one axis perpendicular to a direction facing the workpiece; and a first feed device that feeds the workpiece in a direction perpendicular to the feed axis of the tool electrode. a second feeding device for feeding, a detection device for detecting the amount of feed by the two feeding devices, and a control device for comparing the detection signals of the detection devices and controlling the two feeding devices in relation to a predetermined relationship. is provided, machining fluid is supplied between the tool electrode and the workpiece, and machining pulses are applied to perform electrical discharge machining.

〔実施例〕〔Example〕

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.

第１図はネジを加工する実施例で、１は所定ピッチのネ
ジ溝に相当する形状の複数突起１ａ、１ｂ、ｌｃを有す
るガイドで、この各突起１ａ、１ｂ、１ｃに電極ワイヤ
２を移動走行させる。３はワイヤ１を供給するリール、
４が巻取りリールで、各リールにブレーキ及びテンショ
ン作用を兼用させるか別個のブレーキローラとテンショ
ンローラを設けてガイド１を移動するワイヤ２に所定の
張力を作用し、且つ所定の速度で移動走行させ、この突
起１ａ、１ｂ、ｌｃを移動するワイヤ電極部分をロール
状被加工体５に対向して加工する。６はガイド１を被加
工体５と平行する方向に送るネジ軸で、モータ　７によ
って駆動される。８は被加工体５を回転する回転軸、９
がその回転駆動モータ、１０及び１１は各軸に設けた回
転角検出のエンコーダで、１２が両エンコーダの検出信
号を比較しながらモータ７を制御する制御装置である。Fig. 1 shows an example of machining a screw, where 1 is a guide having a plurality of protrusions 1a, 1b, and lc each having a shape corresponding to a thread groove with a predetermined pitch, and an electrode wire 2 is moved to each of these protrusions 1a, 1b, and 1c. Let it run. 3 is a reel that supplies wire 1;
Reference numeral 4 denotes a take-up reel, each reel having both a brake and tension function or a separate brake roller and tension roller provided to apply a predetermined tension to the wire 2 moving on the guide 1, and to move and run at a predetermined speed. Then, the wire electrode portion that moves on these protrusions 1a, 1b, and lc is processed facing the roll-shaped workpiece 5. Reference numeral 6 denotes a screw shaft that feeds the guide 1 in a direction parallel to the workpiece 5, and is driven by a motor 7. 8 is a rotating shaft for rotating the workpiece 5; 9
The rotary drive motor 10 and 11 are encoders for detecting the rotational angle provided on each axis, and 12 is a control device that controls the motor 7 while comparing the detection signals of both encoders.

１３はワイヤ電極２と被加工体５間にパルス通電して放
電加工する加工用電源である。Reference numeral 13 denotes a machining power source that applies pulse current between the wire electrode 2 and the workpiece 5 to perform electrical discharge machining.

ガイド１とワイヤ２で形成される工具電極と被加工体５
の対向間隙には図示しないノズルから加工液が供給され
、加工液を介して加工用電源１３からパルスが供給され
、パルス放電を繰返して放電加工が行なわれる。加工は
モータ　７によりネジ軸６を制御してガイド１を移動し
、又、モータ９により被加工体５を回転する。ネジ軸６
によるガイド１の移動量はエンコーダ１０で検出し、又
、被加工体５の回転は回転軸８に設けられたエンコーダ
１１により検出され、両エンコーダ１０．１１の検出信
号は制御回路１２に加わって比較され、被加工体５が１
回転したときガイド１の突起部１ａ、１ｂ、Ｉｃが丁度
１ピツチ移動するよう関連して制御する制御信号を発生
し、モータ　７及び９を制御する。このようにしてガイ
ド１と被加工体５を駆動制御し、ガイドの突起１ａ、１
ｂ、１ｃを移動するワイヤ電極２と被加工体５との間隙
に放電を発生して加工する。ワイヤ電極２は常に所定速
度で移動し更新されているから、加工部分は実質的に無
消耗で加工が行なわれ加工形状精度を高めて高精度に精
密ネジ加工が行なえる。Tool electrode and workpiece 5 formed by guide 1 and wire 2
Machining fluid is supplied from a nozzle (not shown) to the opposing gap, and pulses are supplied from the machining power source 13 via the machining fluid, and electrical discharge machining is performed by repeating pulse discharge. During machining, a motor 7 controls the screw shaft 6 to move the guide 1, and a motor 9 rotates the workpiece 5. screw shaft 6
The amount of movement of the guide 1 is detected by the encoder 10, and the rotation of the workpiece 5 is detected by the encoder 11 provided on the rotating shaft 8, and the detection signals of both encoders 10 and 11 are added to the control circuit 12. compared, the workpiece 5 is 1
A control signal is generated to control the motors 7 and 9 so that the projections 1a, 1b, and Ic of the guide 1 move exactly one pitch when the guide 1 rotates. In this way, the guide 1 and the workpiece 5 are driven and controlled, and the protrusions 1a and 1 of the guide are
Machining is performed by generating an electrical discharge in the gap between the wire electrode 2 and the workpiece 5, which move along the lines b and 1c. Since the wire electrode 2 is constantly moved and updated at a predetermined speed, the machining portion can be machined with virtually no consumption, the precision of the machined shape can be improved, and precision screw machining can be performed with high accuracy.

ガイドの突起は１つでもよいが、図のように複数個並設
しておくことによって全体として加工面積が増加し面積
効果により安定加工が行なえ加工速度が増大すると共に
、各突起部分が被加工体のネジ溝内に順次移動して加工
が行なわれ、粗加工から仕上加工まで１度に加工できる
効果がある。A single guide protrusion may be sufficient, but by arranging multiple guides in parallel as shown in the figure, the overall machining area increases, stable machining can be performed due to the area effect, and machining speed increases. Machining is carried out by sequentially moving into the thread groove of the body, which has the effect of allowing processing from rough machining to finishing machining all at once.

以上はネジ加工する実施例について説明したが、被加工
体にはネジ以外の諸種な形状の溝加工、突出加工等の加
工ができ、板状の被加工体も容易に加工することができ
る。又、第１図に於ては、ガイドの移動と被加工体の回
転制御に各々独立した駆動モータを設けたが、一方を他
方に歯車、ベルト機構により係合した駆動制御を行なう
ようにすることもできる。Although the embodiment in which screws are machined has been described above, the workpiece can be machined with various shapes other than screws, such as grooves and protrusions, and plate-shaped workpieces can also be easily machined. In addition, in Fig. 1, separate drive motors are provided to control the movement of the guide and the rotation of the workpiece, but one drive control is performed by engaging the other with gears and a belt mechanism. You can also do that.

〔発明の効果〕〔Effect of the invention〕

以上のように本発明は、工具電極として、１つ若しくは
複数の突起を有するガイドにワイヤ、テープ等の長尺電
極を移動走行させた構成のものを設けたので、長尺電極
材が常に移動して新しい部分を加工面に通過させ更新さ
れているので実質的に電極無消耗で、常にガイド形状の
高精度を維持して加工することができ加工精度を向上す
る。又、複数突起のガイドを用いることにより加工速度
を高めることができ、溝加工の場合に複数突起が順次同
一の溝に移動して加工するので、順次粗加工から仕上加
工まで１度に加工することができ、高精度に為速度に目
的とする溝加工をすることができる。As described above, in the present invention, a tool electrode is provided in which a long electrode such as a wire or tape is moved and run on a guide having one or more protrusions, so that the long electrode material is constantly moved. Since the new part is passed through the machining surface and updated, there is virtually no electrode consumption, and the high accuracy of the guide shape can always be maintained during machining, improving machining accuracy. In addition, the machining speed can be increased by using a guide with multiple protrusions, and in the case of groove machining, multiple protrusions are sequentially moved to the same groove for machining, so processing from rough machining to finishing machining can be performed in one step. It is possible to machine the desired groove with high precision and speed.

又、加工送りは、工具電極を被加工体と対向する方向と
直交する１軸に送りを与える第１の送り装置と、被加工
体を前記工具電極の送り軸と直交する方向に送りを与え
る第２の送り装置とを設け、両送り装置による送り場を
各々検出する検出装置と、該検出装置の検出信号を比較
して所定の関係に関連して前記両送り装置を制御する制
御装置を設けてなるものであるから、前記第１及び第２
の両送り装置の送り量の検出信号により、それを比較し
て加工しようとする形状に対応する所定の倍率とか比例
関係になるよう制御装置によって両方の送り装置を制御
するようにしたものであるから、任意の形状法りにより
任意形状の加工を高精度にすることができる。加工作用
は放電加工によるから被加工体が焼入鋼、超硬合金等の
硬質材を容易に高精度に加工することができる効果があ
る。The machining feed includes a first feed device that feeds the tool electrode in one axis perpendicular to the direction facing the workpiece, and a first feed device that feeds the workpiece in a direction perpendicular to the feed axis of the tool electrode. a second feeding device, a detection device that detects the feeding stations of both feeding devices, and a control device that compares the detection signals of the detection devices and controls the two feeding devices in relation to a predetermined relationship. Since the first and second
The detection signal of the feed amount of both feeders is compared and the control device controls both feeders so that a predetermined magnification or proportional relationship corresponding to the shape to be processed is achieved. Therefore, high precision machining of any shape can be achieved by machining any shape. Since the machining action is based on electric discharge machining, it is possible to easily machine a hard material such as hardened steel or cemented carbide with high precision.

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

第１図は本発明の一実施例装置である。１・・・・・・・・・ガイド１ａ、１ｂ、Ｉｃ　　・・・・・・・・・突起２・・・
・・・・・・ワイヤ電極３．４・・・・・・・・・リール５・・・・・・・・・被加工体６・・・・・・・・・送り軸７・・・・・・・・・モータ８・・・・・・・・・回転軸９・・・・・・・・・モータ１０．１１・・・・・・・・・エンコーダ１２・・・・
・・・・・制御装置１３・・・・・・・・・加工用電源時　　許　　出　　願　　人代表者　　井　　上　　　　　潔　　・　、−４□１．
−レ゛FIG. 1 shows an apparatus according to an embodiment of the present invention. 1...Guides 1a, 1b, Ic...Protrusion 2...
...Wire electrode 3.4 ...Reel 5 ... Workpiece 6 ...... Feed shaft 7 ... ...Motor 8 ...Rotating shaft 9 ...Motor 10.11 ... Encoder 12 ...
...Control device 13...When power supply is used for processing Applicant Representative Kiyoshi Inoue ・, -4□1.
−Ray

Claims

【特許請求の範囲】[Claims]

１つ若しくは複数の突起を有するガイドにワイヤ、テー
プ等の長尺電極を移動走行させて電極加工面とした工具
と、該工具電極を被加工体と対向する方向と直交する１
軸に送りを与える第１の送り装置と、前記被加工体を前
記工員電極の送り軸と直交する方向に送りを与える第２
の送り装置と、前記両送り装置による送り量を各々検出
する検出装置と、該検出装置の検出信号を比較して所定
の関係に関連して前記両送り装置を制御する制御装置と
、前記工具電極と被加工体間に加工液を供給する装置と
、前記工具電極と被加工体間に加工用パルスを供給する
加工用電源とを設けて成る放電加工装置。A tool that uses a long electrode such as a wire or tape as an electrode machining surface by moving and running it on a guide having one or more protrusions, and a tool that runs the tool electrode perpendicularly to the direction facing the workpiece.
a first feed device that feeds the shaft; and a second feed device that feeds the workpiece in a direction perpendicular to the feed axis of the worker electrode.
a feeding device, a detection device that detects the feed amount by each of the two feeding devices, a control device that compares detection signals of the detection devices and controls the two feeding devices in relation to a predetermined relationship, and the tool. An electrical discharge machining apparatus comprising: a device for supplying machining fluid between an electrode and a workpiece; and a machining power source for supplying machining pulses between the tool electrode and the workpiece.