JPH034333B2 - - Google Patents
Info
- Publication number
- JPH034333B2 JPH034333B2 JP58214980A JP21498083A JPH034333B2 JP H034333 B2 JPH034333 B2 JP H034333B2 JP 58214980 A JP58214980 A JP 58214980A JP 21498083 A JP21498083 A JP 21498083A JP H034333 B2 JPH034333 B2 JP H034333B2
- Authority
- JP
- Japan
- Prior art keywords
- wire electrode
- machining
- workpiece
- wire
- machining 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
- 238000003754 machining Methods 0.000 claims description 59
- 239000012530 fluid Substances 0.000 claims description 36
- 238000009763 wire-cut EDM Methods 0.000 claims description 8
- 238000009760 electrical discharge machining Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 description 15
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- B23H7/101—Supply of working media
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)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、ワイヤ放電加工中にワイヤ電極が断
線した場合に加工開始位置において、ワイヤ電極
を修復したのち、ワイヤ電極断線位置へ既加工軌
跡の間隙を通過し復帰する際、ワイヤ電極と被加
工物との接触を防止するようにしたワイヤ放電加
工装置に関するものである。Detailed Description of the Invention [Technical Field of the Invention] The present invention is directed to repairing the wire electrode at the machining start position when the wire electrode is disconnected during wire electric discharge machining, and then redirecting the already machined trajectory to the wire electrode disconnection position. The present invention relates to a wire electrical discharge machining device that prevents contact between a wire electrode and a workpiece when returning after passing through a gap.
導電性の被加工物に対し、ワイヤ電極を微小間
隙を介して対向させ、被加工物とワイヤ電極との
間に加工液を供給し、その加工液の媒介の下にパ
ルス性の放電を繰り返し発生させ、放電エネルギ
により被加工物を切断加工するワイヤ放電加工装
置は周知であり、硬い金属等の複雑な切断加工を
精度良く容易に行なうことができる利点を有す
る。
A wire electrode is placed opposite a conductive workpiece through a small gap, machining fluid is supplied between the workpiece and the wire electrode, and pulsed discharge is repeated under the mediation of the machining fluid. A wire electrical discharge machining apparatus that generates electrical discharge energy to cut a workpiece is well known, and has the advantage of being able to easily perform complex cutting of hard metals and the like with high accuracy.
しかし、被加工物を放電切断加工しようとする
場合には、ワイヤ電極を被加工物中に貫通させる
ようにして供給することが必要である。 However, when a workpiece is to be subjected to electrical discharge cutting, it is necessary to supply the wire electrode so as to penetrate the workpiece.
ワイヤ電極は、通常細い金属製のものであり、
放電加工中に異常事態の発生によりしばしばワイ
ヤ電極が断線することがあり、この様な場合に
は、加工開始位置へＸ−Ｙクロステーブルを移動
させ、加工開始位置にてワイヤ電極を新しいもの
に修復させる。このワイヤ電極の修復作業は自動
的に行なうものと、人手によるものとがある。 Wire electrodes are usually made of thin metal;
The wire electrode may often break due to an abnormal situation during electrical discharge machining. In such cases, move the X-Y cross table to the machining start position and replace the wire electrode with a new one at the machining start position. Let it be repaired. This wire electrode repair work may be performed automatically or manually.
ワイヤ電極の修復完了後、ワイヤ電極を次々に
供給しつつ、既加工軌跡の間隙を通過し、ワイヤ
電極断線位置へ復帰し復帰後、ワイヤ電極断線位
置より、ワイヤ電極断線前の切断加工を続行すべ
く、ワイヤ電極、及び被加工物に加工液の供給を
開始した後、パルス性の放電を発生させ、ワイヤ
電極断線前の放電切断加工を続行させている。 After the repair of the wire electrode is completed, the wire electrode is supplied one after another, passing through the gap in the already processed trajectory, returning to the wire electrode breakage position, and after returning, continuing the cutting process before the wire electrode breakage from the wire electrode breakage position. In order to achieve this, after starting the supply of machining fluid to the wire electrode and workpiece, a pulsed discharge is generated to continue the discharge cutting process before the wire electrode is disconnected.
第１図は従来型のものでワイヤ電極が既加工軌
跡の間隙を通過する際の例が示されている。 FIG. 1 shows an example of a conventional type in which a wire electrode passes through a gap in a pre-processed locus.
１はワイヤ電極、２は被加工物、３は既加工軌
跡の間隙、４は切削屑、５は上部加工液供給ノズ
ル、６は下部加工液供給ノズルである。 1 is a wire electrode, 2 is a workpiece, 3 is a gap between the machining loci, 4 is cutting waste, 5 is an upper machining liquid supply nozzle, and 6 is a lower machining liquid supply nozzle.
このような従来の装置において加工開始位置で
ワイヤ電極１の修復後断線位置に復帰されること
になるが、図示のように上部と下部の加工液供給
ノズル５と６からの加工液の供給は停止されてい
る。そして、ワイヤ電極１が既加工軌跡３を通過
する際、ワイヤ電極の振幅等の影響により、ワイ
ヤ電極１と被加工物２が接触し、ワイヤ電極１が
被加工物２により、切削され、切削屑４が発生し
短絡現象につながる。又この切削現象の悪化によ
りワイヤ電極の断線にむすびつくことになる。 In such a conventional device, the wire electrode 1 is returned to the disconnection position after repair at the machining start position, but as shown in the figure, machining fluid is not supplied from the upper and lower machining fluid supply nozzles 5 and 6. It has been stopped. When the wire electrode 1 passes through the machining trajectory 3, the wire electrode 1 and the workpiece 2 come into contact due to the influence of the amplitude of the wire electrode, etc., and the wire electrode 1 is cut by the workpiece 2. Debris 4 is generated, leading to a short circuit phenomenon. Furthermore, this aggravation of the cutting phenomenon may lead to disconnection of the wire electrode.
第２図は第１図の断面を示すものである。FIG. 2 shows a cross section of FIG. 1.
この様に、ワイヤ電極断線位置へ復帰する際、
既加工軌跡の間隙をワイヤ電極が通過して行くわ
けであるが、このワイヤ電極が通過する間隙は通
常、ワイヤ電極の直径プラス0.05mm〜0.06mm程度
の非常に微小なものであるため、ワイヤ電極が既
加工軌跡の間隙を通過する際、ワイヤ電極が被加
工物と接触することがしばしば発生し、このため
ワイヤ電極が被加工物により切削され、切削屑が
発生し、切削屑によりワイヤ電極と被加工物とが
短絡し、ワイヤ電極断線位置へ復帰し、放電切断
加工を続行しようとする際、短絡しているため放
電することができず、放電切断加工を断念せざる
を得ない。 In this way, when returning to the wire electrode disconnection position,
The wire electrode passes through the gap of the already machined trajectory, but the gap through which the wire electrode passes is usually very small, about 0.05 mm to 0.06 mm plus the diameter of the wire electrode. When the electrode passes through the gap of the already machined trajectory, the wire electrode often comes into contact with the workpiece, so that the wire electrode is cut by the workpiece, generating cutting waste, and the cutting waste causes the wire electrode to When the wire electrode and the workpiece are short-circuited and the wire electrode returns to the disconnection position and attempts to continue the electric discharge cutting process, the electric discharge cannot be generated because of the short circuit, and the electric discharge cutting process has to be abandoned.
又、ワイヤ電極が被加工物により切削される場
合、ワイヤ電極の切削のみならず、断線する場合
も発生し、放電切断加工の続行が不可能となつて
しまう。 Further, when the wire electrode is cut by the workpiece, not only the wire electrode is cut but also the wire may be broken, making it impossible to continue the electric discharge cutting process.
本発明は、上記従来の課題に鑑みなされたもの
であり、その目的は、ワイヤ放電加工装置のワイ
ヤ電極断線時において、加工開始位置でワイヤ電
極の修復後、既加工軌跡の間隙を通過し、ワイヤ
電極断線位置へ復帰し、放電切断加工を続行する
上において、ワイヤ電極が既加工軌跡の間隙を通
過する際、ワイヤ電極と被加工物との接触を防止
し、ワイヤ電極の切削屑の発生及びワイヤ電極の
断線をなくし、ワイヤ電極断線時における放電切
削加工の続行を円滑に行なうワイヤ放電加工装置
を提供することにある。
The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to repair the wire electrode at the machining start position and then pass through the gap of the already machining trajectory when the wire electrode of a wire electric discharge machining device is disconnected. When the wire electrode returns to the broken position and continues electrical discharge cutting, it prevents contact between the wire electrode and the workpiece when it passes through the gap in the machining trajectory, and generates cutting debris from the wire electrode. Another object of the present invention is to provide a wire electrical discharge machining apparatus that eliminates wire electrode breakage and smoothly continues electrical discharge machining when the wire electrode breaks.
上記目的を達成するために、本発明によるワイ
ヤ放電加工装置は、導電性の被加工物に対しワイ
ヤ電極を微小間隙を介して対向させ、該微小間隙
に供給される加工液の媒介の下に発生する放電エ
ネルギにより被加工物を切断加工すると共に、一
方上記ワイヤ電極の断線時には自動的にワイヤ電
極をＸ−Ｙクロステーブルを介して加工開始位置
へ移動させ、該加工開始位置にてワイヤ電極の修
復を行つたのち既加工軌跡の間隙にワイヤ電極を
通過させながら上記のワイヤ電極断線位置へ復帰
し、その後放電エネルギを発生させて加工を続行
するようにしたワイヤ放電加工装置において、上
記ワイヤ電極断線位置へ復帰する際に放電加工時
の加工液供給量と異なる減少させた加工液量をワ
イヤ電極と被加工物間に供給する加工液供給手段
を備えたことを特徴とするものである。 In order to achieve the above object, a wire electrical discharge machining apparatus according to the present invention has a wire electrode facing a conductive workpiece through a minute gap, and a machining fluid supplied to the minute gap. The workpiece is cut by the generated discharge energy, and when the wire electrode breaks, the wire electrode is automatically moved to the machining start position via the X-Y cross table, and the wire electrode is cut at the machining start position. In the wire electrical discharge machining apparatus, the wire electrode returns to the wire electrode breakage position while passing through the gap of the already machined locus after repairing the wire, and then continues machining by generating electrical discharge energy. The present invention is characterized by comprising machining fluid supply means for supplying a reduced amount of machining fluid between the wire electrode and the workpiece, which is different from the amount of machining fluid supplied during electrical discharge machining, when returning to the electrode disconnection position. .
以下本発明の一実施例を図により説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第３図はこの実施例の断面図で、ワイヤ電極と
被加工物の間隙に加工液を供給している状態を示
している。第４図はこの加工液供給量の制御図で
ある。これらの図において、第１図及び第２図と
同一のものは同一符号を付して説明を省略す。８
は加工液供給タンク、９は加工液量調整用電磁
弁、１０は手動の調整弁、１１はポンプである。 FIG. 3 is a sectional view of this embodiment, showing a state in which machining fluid is supplied to the gap between the wire electrode and the workpiece. FIG. 4 is a control diagram of the amount of machining fluid supplied. In these figures, the same parts as in FIGS. 1 and 2 are designated by the same reference numerals, and their explanation will be omitted. 8
9 is a machining fluid supply tank, 9 is a solenoid valve for adjusting the amount of machining fluid, 10 is a manual adjustment valve, and 11 is a pump.
ワイヤ電極１が既加工軌跡の間隙３を通過する
際の接触を防止するため、上下加工液供給ノズル
５，６より、加工液７を噴出させワイヤ電極１と
被加工物２との間隙に加工液を注入する。これに
より、ワイヤ電極と被加工物間は一種の絶縁性の
緩衝物で遮られるため、ワイヤ電極１と被加工物
２との接触が防止できることは明白である。 In order to prevent contact when the wire electrode 1 passes through the gap 3 of the machining trajectory, machining fluid 7 is jetted from the upper and lower machining fluid supply nozzles 5 and 6 to form the machining process in the gap between the wire electrode 1 and the workpiece 2. Inject the liquid. As a result, since the wire electrode and the workpiece are blocked by a kind of insulating buffer, it is clear that contact between the wire electrode 1 and the workpiece 2 can be prevented.
又、一般的に加工液は純水が使用され、仮にワ
イヤ電極１と被加工物２が接触した場合でも、加
工液が潤滑剤の役割を果し、摩擦係数の軽減作用
によりワイヤ電極１の破損が防止できる。 In addition, generally pure water is used as the machining fluid, and even if the wire electrode 1 and the workpiece 2 come into contact, the machining fluid acts as a lubricant and reduces the coefficient of friction, so that the wire electrode 1 Damage can be prevented.
しかしながら、加工液７の噴出量が多大な場
合、加工液７によりワイヤ電極の振幅現象あるい
は、たわみ現象の発生を助長し、加工液による接
触防止機能が無意味なものになる。この加工液に
よるワイヤ電極の振幅現象、たわみ現象を防止し
かつ、加工液によるワイヤ電極１と被加工物２と
の接触を防止するため加工液７の噴出量を第４図
に示す加工液供給タンク８における加工液量調整
用電磁弁９を制御し、加工液噴出量を微少なもの
にして加工液を供給することにより、ワイヤ電極
１の振幅、たわみ現象が解消され、加工液による
ワイヤ電極と被加工物との接触防止の両者が同時
に実現できる。 However, if the amount of machining fluid 7 ejected is large, the machining fluid 7 will promote the amplitude phenomenon or deflection phenomenon of the wire electrode, and the contact prevention function of the machining fluid will become meaningless. In order to prevent the amplitude phenomenon and deflection phenomenon of the wire electrode caused by this machining fluid and to prevent contact between the wire electrode 1 and the workpiece 2 due to the machining fluid, the machining fluid is supplied at a spouting amount of the machining fluid 7 as shown in Fig. 4. By controlling the solenoid valve 9 for adjusting the amount of machining fluid in the tank 8 and supplying machining fluid with a small amount of machining fluid ejected, the amplitude and deflection of the wire electrode 1 are eliminated, and the wire electrode due to the machining fluid is Both of this and prevention of contact with the workpiece can be achieved at the same time.
以上のように、本発明によるワイヤ放電加工装
置によれば、ワイヤ電極断線時の復帰中による、
ワイヤ電極と被加工物の接触によるワイヤ電極の
破損等による異常事態が防止でき円滑な放電切断
加工が実現可能となる。
As described above, according to the wire electrical discharge machining apparatus according to the present invention, during recovery when the wire electrode is disconnected,
Abnormal situations such as damage to the wire electrode caused by contact between the wire electrode and the workpiece can be prevented, and smooth electrical discharge cutting can be achieved.
第１図は、従来型によるワイヤ電極が被加工物
の間隙を通過する際に接触した状態を示す説明
図、第２図は第１図の断面図、第３図は本発明の
実施例を示し、ワイヤ電極と被加工物の間隙に加
工液を供給する場合の説明図、第４図は加工液供
給量の制御図である。各図中同一部材には同一符
号を付し、１はワイヤ電極、２は被加工物、３は
既加工軌跡の間隙、４は切削屑、５は上部加工液
供給ノズル、６は下部加工液供給ノズル、８は加
工液タンク、９は加工液量調整用電磁弁、１０は
手動の調整弁、１１は加工液吸上げポンプであ
る。
FIG. 1 is an explanatory diagram showing a state in which a conventional wire electrode contacts a workpiece when passing through a gap, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is an illustration of an embodiment of the present invention. FIG. 4 is an explanatory diagram of the case where machining fluid is supplied to the gap between the wire electrode and the workpiece, and FIG. 4 is a control diagram of the machining fluid supply amount. The same members in each figure are given the same symbols, 1 is the wire electrode, 2 is the workpiece, 3 is the gap between the machining traces, 4 is the cutting waste, 5 is the upper machining fluid supply nozzle, and 6 is the lower machining fluid. A supply nozzle, 8 a machining liquid tank, 9 a solenoid valve for adjusting the amount of machining liquid, 10 a manual adjustment valve, and 11 a machining liquid suction pump.
Claims (1)
隙を介して対向させ、該微小間隙に供給される加
工液の媒介の下に発生する放電エネルギにより被
加工物を切断加工すると共に、一方上記ワイヤ電
極の断線時には自動的にワイヤ電極をＸ−Ｙクロ
ステーブルを介して加工開始位置へ移動させ、該
加工開始位置にてワイヤ電極の修復を行つたのち
既加工軌跡の間隙にワイヤ電極を通過させながら
上記のワイヤ電極断線位置へ復帰し、その後放電
エネルギを発生させて加工を続行するようにした
ワイヤ放電加工装置において、上記ワイヤ電極断
線位置へ復帰する際に放電加工時の加工液供給量
と異なる減少させた加工液量をワイヤ電極と被加
工物間に供給する加工液供給手段を備えたことを
特徴とするワイヤ放電加工装置。1. A wire electrode is placed opposite to a conductive workpiece through a microgap, and the workpiece is cut by discharge energy generated through the medium of machining fluid supplied to the microgap. When the wire electrode breaks, the wire electrode is automatically moved to the processing start position via the X-Y cross table, the wire electrode is repaired at the processing start position, and then the wire electrode is passed through the gap of the already processed trajectory. In a wire electrical discharge machining device that returns to the above-mentioned wire electrode breakage position while returning to the wire electrode breakage position, and then generates electrical discharge energy to continue machining, the amount of machining fluid supplied during electrical discharge machining when returning to the above wire electrode breakage position 1. A wire electrical discharge machining apparatus comprising a machining fluid supply means for supplying a reduced amount of machining fluid between a wire electrode and a workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21498083A JPS60108223A (en) | 1983-11-17 | 1983-11-17 | Wire electric-discharge machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21498083A JPS60108223A (en) | 1983-11-17 | 1983-11-17 | Wire electric-discharge machining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60108223A JPS60108223A (en) | 1985-06-13 |
| JPH034333B2 true JPH034333B2 (en) | 1991-01-22 |
Family
ID=16664722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21498083A Granted JPS60108223A (en) | 1983-11-17 | 1983-11-17 | Wire electric-discharge machining device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60108223A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120132623A1 (en) * | 2010-11-30 | 2012-05-31 | Justice Jr Jimmy Roger | Electrode holder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149133A (en) * | 1982-02-26 | 1983-09-05 | Mitsubishi Electric Corp | Wire electrode feeder for wire cut electrospark machining apparatus |
-
1983
- 1983-11-17 JP JP21498083A patent/JPS60108223A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149133A (en) * | 1982-02-26 | 1983-09-05 | Mitsubishi Electric Corp | Wire electrode feeder for wire cut electrospark machining apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60108223A (en) | 1985-06-13 |
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