JPS60172420A - Electric discharge machining method - Google Patents
Electric discharge machining methodInfo
- Publication number
- JPS60172420A JPS60172420A JP2936484A JP2936484A JPS60172420A JP S60172420 A JPS60172420 A JP S60172420A JP 2936484 A JP2936484 A JP 2936484A JP 2936484 A JP2936484 A JP 2936484A JP S60172420 A JPS60172420 A JP S60172420A
- Authority
- JP
- Japan
- Prior art keywords
- machining
- feed
- work
- discharge
- repeating
- 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
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
- B23H7/04—Apparatus for supplying current to working gap; Electric circuits specially adapted therefor
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
Description
【発明の詳細な説明】
本発明は型彫り若しくはワイヤカットを行なう放電加工
方法の改良に関“す゛る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an electrical discharge machining method for performing die engraving or wire cutting.
従来、例えばダイをワイヤカットづる場合等、予め仕上
代を残しておいて、１次カットを行ない、次に゛同一加
工形状のオフセット間を徐々に小さくして、２回、３回
・・・・・・・・・と仕上加■するレカンドカット法が
知られている。又型彫加工を行なうとき電極と被加工体
の対向方向と直角方向に微小量づつ寄せて加工Ｊること
が公知である。Conventionally, for example, when wire-cutting a die, a finishing allowance is left in advance and the first cut is made, then the offset distance of the same processed shape is gradually reduced, and the cut is made two or three times... The Recand cut method is known to add finishing touches. Furthermore, it is known that when performing die engraving, the electrode and the workpiece are processed in small amounts in a direction perpendicular to the direction in which they face each other.
しかしこのようなファストカットに於て所定の（Ｊ上代
を残しておいて、それをオフセット量を変え’ｔ′Ｋか
ら加工する方式では工作物に変形があったどき放電加工
量が場所により異なるから加工拡大代が部分的に違って
きたりして非常に危険である。However, in such fast cutting, if a predetermined (J) is left and the offset amount is changed and machining is performed from 't'K, the amount of electrical discharge machining will vary depending on the location when the workpiece is deformed. This is extremely dangerous as the machining expansion allowance may be partially different.
仕上代を加工する２回目以後の加工時間も極めて長い。The machining time after the second time of machining the finishing allowance is also extremely long.
本発明はこのような欠点に鑑みて提案されたもので、オ
フセット量を変えることなく最初と同一軌跡のままの送
りを複数回路えながら加工し、加工電流若しくはその比
例電流が所定値に低下するまで加にを繰返すようにした
ことを特徴とする。The present invention was proposed in view of these shortcomings, and involves machining while maintaining the same trajectory as the beginning without changing the amount of offset, thereby reducing the machining current or its proportional current to a predetermined value. It is characterized by repeating the kani until the end.
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図はワイヤカットを行なう場合の例で、１はワイＡ
７電極で、図示しないリールから供給され、」：下のガ
イド２，３間を所定の張力と速麿をもって矢印方向に走
行移動する。４は被加工体で、加工テーブル５に固定さ
れ、テーブルがＸ軸、Ｙ軸モ−タ ６，７にＪ：り駆動
され、破船二１一体４をライ１フ電極１に対して相対的
に加工形状の送り！ｊえる。８が加工形状の送り１９月
を発！１゛ＪるＮＣ制御装装置、９は被加工体４の上下
方向から加−１１部分に加工液（イオン交換処理水）を
供給Ｊるノズル、１０はノズル９の周りに同軸に設（Ｊ
だ液流カーテンを形成する噴流ノズル、１１はワイ〜７
電極１ど被加工体４との間にパルス電１１−を加え放電
を繰返づための加工用電源である。Figure 1 shows an example of wire cutting, and 1 is wire A.
It has 7 electrodes, is supplied from a reel (not shown), and travels in the direction of the arrow between the lower guides 2 and 3 with a predetermined tension and speed. 4 is a workpiece, which is fixed to a processing table 5, and the table is driven by X-axis and Y-axis motors 6 and 7 to move the shipwreck 1 and 4 relative to the life electrode 1. Send the processed shape! I can do it. 8 will send the processed shape in 19 months! 1 is an NC control device; 9 is a nozzle that supplies machining fluid (ion-exchange treated water) from the top and bottom of the workpiece 4 to the addition section 11; 10 is a nozzle installed coaxially around the nozzle 9;
A jet nozzle that forms a saliva flow curtain, 11 is W~7
This is a machining power source for applying pulsed electricity 11- between the electrode 1 and the workpiece 4 to repeat electric discharge.
以−トに於て、ガイド２，３間を走行り−るワーｒＡ７
電極１と被加工体４のス・１向間隙にノズル９から水加
工液を供給し電源１１からパルス電圧を加λて放電を繰
返し放電加工する。加工中、ＮＣ制御装置８によりモー
タ６，７を駆動１）、プ［１グラムして記憶しである所
要加工形状の送りをテーブル；）に固定した被加工体４
側に与え、ワイＸ７電極１との間Ｇ、７相対送りして加
工する。処女加工のフ１ストカットに於ける前記加工送
りｔ〕所要の１！７ Ｊ：うとりる目的加工形状通りの
送りを行ない加工形状を１Ｎ転させて先ず初めのカット
を行なう。次に加工用電源１１＃Ｉう供給づる加工パル
ス条件を同一として若１ノくはＴネルギを減少した状態
で２回目のカットを行なう。このときのＮＣ制御装置８
による加工形状送りら第１回目の形状軌跡と等しく設定
して加工送りＪる。更に同一形状軌跡を３回、４回と加
工送りｌノて放電加重［を繰返ず。この繰返しによって
加工電流は次第に低減し、ついには放電が起ら／ｒいス
パークアウトの状態になる。At this point, the work rA7 running between guides 2 and 3
A water machining fluid is supplied from a nozzle 9 to the gap between the electrode 1 and the workpiece 4 in the 1 direction, and a pulse voltage is applied from a power source 11 to repeatedly generate electrical discharge for electrical discharge machining. During machining, the motors 6 and 7 are driven by the NC control device 8 (1), and the feed of the required machining shape is determined by 1 gram and stored on the table;
Give it to the side and process it by moving G, 7 relative to the YX7 electrode 1. The machining feed t in the first cut of virgin machining] Required 1!7 J: Feed according to the intended machining shape, rotate the machining shape 1N, and first make the first cut. Next, a second cut is performed with the machining pulse conditions supplied to the machining power supply 11#I being the same and the T energy being decreased by one or more. NC control device 8 at this time
The machining shape feed is set to be equal to the first shape locus, and the machining feed is J. Furthermore, the same shape trajectory was repeated three or four times, and the discharge load was applied without repeating the machining feed. By repeating this process, the machining current gradually decreases, and finally a spark-out state occurs where electric discharge occurs.
第２図は前記１回［！、２回目・・・・・・・・・と同
一形状軌跡を加Ｔしたときの加工の繰返し回数と加工電
流の減少変化状態を実験したグラフ図で、板厚１０ｍｍ
のＳＫＤ祠を線径０．２ｍｍφの黄銅線を電極として加
重Ｆシた。図に於て、（イ）は毎回電源電圧２００Ｖ一
定にして加工し、１１回でスパークアウトにな−）だ。Figure 2 shows the above-mentioned [! , 2nd time... This is a graph showing the number of repetitions of machining and the state of decrease in machining current when applying T to the same shape locus. The plate thickness is 10 mm.
The SKD shrine was subjected to a load F using a brass wire with a wire diameter of 0.2 mmφ as an electrode. In the figure, (a) is processed with the power supply voltage constant at 200V each time, and sparks out after 11 times.
スパークアウトの形状精度は＋０．６μｍ〜−１，１μ
ｍであった。また（口）は電源電圧を１回１１＝２００
ｖ、２回目−１５０Ｖ、 ３回目−８０Ｖ。Spark out shape accuracy is +0.6μm to -1.1μ
It was m. Also, (mouth) changes the power supply voltage once 11 = 200
v, second time -150V, third time -80V.
４回［＋＝６０Ｖと変更させて加工したときのもので、
４回目の加工精度は→−１．２μｍ〜−１．６μｍであ
った。4 times [+=60V changed and processed,
The machining accuracy for the fourth time was →-1.2 μm to −1.6 μm.
本発明は加工回数を加工電流が所定伯まで低下するまで
繰返すことによって加工完了さ１するが、勿論スパーク
アラ］〜；Ｌで繰返寸ことも精度を高める上で合理的で
ある。In the present invention, machining is completed by repeating the machining number of times until the machining current drops to a predetermined value, but of course it is also reasonable to repeat the machining with spark error]~;L in order to improve accuracy.
以−トのように本発明は所要の目的加工形状の同一軌跡
を複数回繰返しく加工し、加工電流が所定値まで低下す
るまぐの繰返して加工完了さｌるから、第２図グラフに
児１うれるＪ：うに加重［電流が１回目に対して２回目
、２回目に対【）て３回１−１の電流が急減し、それだ
【ノ２２回目３回口、更にそれ以後の加工時間が短＜
ｔｉｔす、これは従来のＡフ１？ット量を変えながらセ
カンドカットする方法に比較して加工時間が著１ノ＜
７．ｉ７絡できることが４つかる１゜そして加工電流の
低減状態を［１安どして加工完了さけるものであるから
加重「精度は白土（〕常に一定精度の加工を行なうこと
ができる。As described above, in the present invention, the same trajectory of the required target machining shape is repeatedly machined multiple times, and the machining is completed by repeating the machining current dropping to a predetermined value. 1 Ureru J: Sea urchin weight [current is 2nd time compared to 1st time, 3rd time 1-1 current decreases sharply compared to 2nd time [22nd time 3rd time mouth, and further after that] Processing time is short
tits, is this the conventional Afu 1? Compared to the method of making a second cut while changing the cut amount, the processing time is significantly shorter than the method of making a second cut while changing the cut amount.
7. It is possible to reduce the machining current by 1 and avoid completing the machining.
尚、本発明はワイヤカッ１へ以外のテープ１ｆ４４を移
動させながら加工するもの、棒状巾純形状電極ヲ用いて
ＮＣ１１Ｉ（ＩｌａｌＩニヨル加工送リヲ’ｉ 、ｉす
”Ｃ）Ｉｌｌ ｌｒｉ リ−るもの、加工形状電極を
用いＺ軸加重−を行なった５−
後若しくは予め形成した加工孔内に於て、直角Ｘ−Ｙ甲
面に面せて加工する方法に於て、同様の効果がある。In addition, the present invention is a method in which processing is performed while moving the tape 1f44 other than the wire cutter 1, a method in which the tape 1f44 is processed while moving it to the wire cutter 1, a method in which the tape 1f44 is processed while moving it to the wire cutter 1, and a method in which the tape 1f44 is processed while moving the tape 1f44 other than to the wire cutter 1. A similar effect can be obtained in a method in which machining is performed facing the right-angled XY back surface after Z-axis loading using a machining shape electrode or in a pre-formed machining hole.
第１図は本発明の一実施例装置の構成図、第２図は本発
明の一実験グラフ図である。
１・・・・・・・・・ワイヤ電極
２．３・・・・・・・・・ガイド
４・・・・・・・・・被加工体
５・・・・・・・・・テーブル
６．７・・・・・・・・・モータ
８・・・・・・・・・ＮＧ装置
９・・・・・・・・・加工液ノズル
１１・・・・・・・・・加工電源
特 許 出 願 人
６−FIG. 1 is a configuration diagram of an apparatus according to an embodiment of the present invention, and FIG. 2 is a graph diagram of an experiment of the present invention. 1...Wire electrode 2.3...Guide 4...Workpiece 5...Table 6 .7...Motor 8...NG device 9...Machining fluid nozzle 11...Machining power supply Permit applicant 6-
Claims (1)
ス放電を繰返して加工する放電加工方法に於て、前記電
極と被加工体との間に行なう相対的加工送りをオフセッ
ト量を変えることなく同一軌跡で与え、前記電極と被加
工体との間に流れる加工電流若しくはその比例電流が所
定（ｉｆｆに低下するまで複数回繰返して加工すること
を特徴とする放電加工方法。In an electric discharge machining method in which machining is performed by repeatedly applying pulsed discharge while giving a relative machining feed between an electrode and a workpiece, changing the offset amount of the relative machining feed performed between the electrode and the workpiece. An electrical discharge machining method characterized in that the machining current is applied on the same trajectory without any changes, and the machining is repeated a plurality of times until the machining current or its proportional current flowing between the electrode and the workpiece decreases to a predetermined value (if).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2936484A JPS60172420A (en) | 1984-02-17 | 1984-02-17 | Electric discharge machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2936484A JPS60172420A (en) | 1984-02-17 | 1984-02-17 | Electric discharge machining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60172420A true JPS60172420A (en) | 1985-09-05 |
Family
ID=12274117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2936484A Pending JPS60172420A (en) | 1984-02-17 | 1984-02-17 | Electric discharge machining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60172420A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10300542B2 (en) | 2014-09-24 | 2019-05-28 | Mitsubishi Electric Corporation | Wire electrical discharge machining apparatus and method of manufacturing semiconductor wafer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58217228A (en) * | 1982-06-08 | 1983-12-17 | Mitsubishi Electric Corp | Wire-cut electric discharge machining method |
-
1984
- 1984-02-17 JP JP2936484A patent/JPS60172420A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58217228A (en) * | 1982-06-08 | 1983-12-17 | Mitsubishi Electric Corp | Wire-cut electric discharge machining method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10300542B2 (en) | 2014-09-24 | 2019-05-28 | Mitsubishi Electric Corporation | Wire electrical discharge machining apparatus and method of manufacturing semiconductor wafer |
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