JPS60180725A - Discharge machining power supply - Google Patents
Discharge machining power supplyInfo
- Publication number
- JPS60180725A JPS60180725A JP3599184A JP3599184A JPS60180725A JP S60180725 A JPS60180725 A JP S60180725A JP 3599184 A JP3599184 A JP 3599184A JP 3599184 A JP3599184 A JP 3599184A JP S60180725 A JPS60180725 A JP S60180725A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- work
- voltage
- positive
- capacitor
- 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.)
- Granted
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
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
Landscapes
- 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】
産業上の利用分野と従来技術
本弁明は、放電加工にお(〕るワークと電極間に正負の
電圧を印加する放電加工電源に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application and Prior Art The present invention relates to an electric discharge machining power source that applies positive and negative voltages between a workpiece and an electrode in electric discharge machining.
従来技術と発明の目的
放電加工において、水等の電解性の加工液を使用すると
電気分解作用が生じる。特に、超硬合金のような電食性
のワークを荒加工する場合などは電食が生じ、ワークを
脆くする等の欠点があった。Prior Art and Purpose of the Invention In electric discharge machining, when an electrolytic machining fluid such as water is used, electrolysis occurs. In particular, when rough machining a workpiece that is susceptible to electrolytic corrosion, such as cemented carbide, electrolytic corrosion occurs, making the workpiece brittle.
また、セカンドカット時においては、電気分解作用のた
めに粒子の選択電食によりワークの表面が荒れて仕上面
の荒さが悪くなる等の欠点があった。In addition, during the second cut, the surface of the workpiece becomes rough due to selective electrolytic corrosion of particles due to the electrolytic action, resulting in poor finished surface roughness.
どれらの欠点は、非加工時に電極とワーク間のギVツブ
に加工時とは逆に逆電圧を印加することによって改善で
きることが知られており、種々の方法が存在するが、本
発明は、このワークと電極間に筒中な回路によって正負
の電圧を印加できるようにした放電加工電源゛を提供す
ることにある発明の構成
本発明は、電極とワーク間に電圧を印加し放電させて加
工を行う放電加工の放電加工電源において、上記電極と
ワークに直列に接続したコンアン1ノと抵抗の直列回路
を直流電源に接続し、ト記]ンデンザと上記電極とワー
クの直列回路と並列にスイッチング素子を接続し、該ス
イッチング素子のオン・オフにより上記電極とワーク間
にiL−負の電圧を印加できるように構成した放電加工
電源である。It is known that these drawbacks can be improved by applying a reverse voltage to the V-tube between the electrode and the workpiece during non-machining, contrary to that during machining, and various methods exist, but the present invention The present invention aims to provide an electric discharge machining power source that can apply positive and negative voltages between the workpiece and the electrode through an internal circuit. In the electrical discharge machining power supply for electrical discharge machining, a series circuit consisting of a resistor and a resistor connected in series with the electrode and the workpiece is connected to a DC power supply, and the series circuit of the conductor and the resistor is switched in parallel with the series circuit of the electrode and the workpiece. This electrical discharge machining power supply is configured so that an iL-negative voltage can be applied between the electrode and the workpiece by connecting elements and turning the switching element on and off.
実施例
第1図は、本発明の一実施例で、Eは直流電源、Rは電
流制限用の抵抗、Tはスイッチング素子としてのトラン
ジスタ、Gは該トランジスタのベース、Cはコンデンサ
、Pは電極・、Wはワークである。Embodiment FIG. 1 shows an embodiment of the present invention, where E is a DC power supply, R is a current limiting resistor, T is a transistor as a switching element, G is the base of the transistor, C is a capacitor, and P is an electrode. , W is the workpiece.
そこで、この実施例の動作を第2図のタイミング及び各
波形を示す図と共に説明する。Therefore, the operation of this embodiment will be explained with reference to FIG. 2 which shows the timing and each waveform.
直流電源Eが投入されると、直流電源E、抵抗R,コン
デンサC1電極P、ワークW、直流電源Eの閉回路によ
り、電極PとワークW間のギャップに第2図(ハ)に示
すようなギャップ電圧Vaが印加される。この場合、電
極Pがプラス側に、ワークWがマイナス側に電圧が印加
される。その後、電極PとワークW間の漏れ電流により
、コンデンサCが充電され、第2図(ロ)に示すように
。When the DC power supply E is turned on, a closed circuit of the DC power supply E, the resistor R, the capacitor C1 electrode P, the work W, and the DC power supply E creates a gap between the electrode P and the work W as shown in Fig. 2 (C). A gap voltage Va is applied. In this case, a voltage is applied to the electrode P on the plus side and the workpiece W on the minus side. Thereafter, the capacitor C is charged by the leakage current between the electrode P and the workpiece W, as shown in FIG. 2 (b).
電極P側がマイナス、抵抗R1すなわちトランジスタT
接続側がプラスになった充電電圧Vcが発生する。この
ような状態で、トランジスタTのベースGに第2図(イ
)に示すようなパルスを印加してトランジスタTをオン
させると、上記コンデン勺Cの充電電圧VCはトランジ
スタTを介してワークWと電極8間に印加される。この
場合、第2図(ハ)に示すように、先とは逆にワークW
側がプラスに、電極P側がマイナスになったギャップ電
圧Vaが印加されることとなる。その後、ワークWと電
極8間に放電が発生し、コンデンサCに蓄えられた電荷
はトランジスタTを介して第2図(ニ)に示すように放
電電流IとなってワークWと電極8間を流れ放電加工を
行う。そして、トランジスタTがオフになると、再び電
1..PとワークW間には加工時とは逆の逆電圧VOが
第2図(ハ)に示すように印加され、以下、前述したと
同様の動作を行い、この動作を繰り返して放電加工が行
われる。Electrode P side is negative, resistor R1 or transistor T
A charging voltage Vc with a positive connection side is generated. In this state, when the transistor T is turned on by applying a pulse as shown in FIG. is applied between the electrodes 8 and 8. In this case, as shown in Fig. 2 (c), the work W
A gap voltage Va in which the side of the electrode P is positive and the side of the electrode P is negative is applied. After that, a discharge occurs between the workpiece W and the electrode 8, and the charge stored in the capacitor C becomes a discharge current I through the transistor T as shown in FIG. Perform flow discharge machining. Then, when the transistor T is turned off, the voltage returns to 1. .. A reverse voltage VO, which is opposite to that during machining, is applied between P and work W as shown in Figure 2 (c), and the same operation as described above is performed, and this operation is repeated to perform electrical discharge machining. be exposed.
発明の効果
以上述べたように、本発明は、簡単な回路により、電極
とワーク間に正負の電圧を印加できるようにしたから、
水等の電解性の加工液を用いた放電加工においてもワー
クの電食を防止できる。Effects of the Invention As described above, the present invention makes it possible to apply positive and negative voltages between the electrode and the workpiece using a simple circuit.
Electrolytic corrosion of the workpiece can be prevented even in electrical discharge machining using an electrolytic machining fluid such as water.
第1図は、本発明の一実施例を示ず図、第2図は、同実
施例のタイミング及び各波形を示1図である。
1日;・・直流電源、T・・・スイッチング素子、C・
・・コンデンυ、R・・・抵抗、P・・・電極、W・・
・ワーク。
特51出願人
ファナック 株式会社
(ばか1名)
第1図
第2図FIG. 1 is a diagram that does not show one embodiment of the present invention, and FIG. 2 is a diagram that shows the timing and each waveform of the same embodiment. 1st: DC power supply, T... switching element, C...
...Condenser υ, R...Resistance, P...Electrode, W...
·work. Special 51 applicant FANUC Co., Ltd. (1 idiot) Figure 1 Figure 2
Claims (1)
電加工の放電加工電源において、上記電極とワークに直
列に接続したコンデンυと抵抗の直列回路を直流電源に
接続し、上記コンデンサと上記電極とワークの直列回路
と並列にスイッチング素子を接続し、該スイッチング素
子のオン・オフにより上記電極とワーク間に正負の電圧
を印加(肯るようにした放電加工電源。In the electrical discharge machining power supply for electrical discharge machining, in which a voltage is applied between the electrode and the workpiece to cause discharge, a series circuit consisting of a capacitor υ and a resistor connected in series with the electrode and the workpiece is connected to a DC power supply, and the capacitor and the An electrical discharge machining power supply in which a switching element is connected in parallel with a series circuit of an electrode and a workpiece, and positive and negative voltages are applied between the electrode and the workpiece by turning on and off the switching element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3599184A JPS60180725A (en) | 1984-02-29 | 1984-02-29 | Discharge machining power supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3599184A JPS60180725A (en) | 1984-02-29 | 1984-02-29 | Discharge machining power supply |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60180725A true JPS60180725A (en) | 1985-09-14 |
JPH0355253B2 JPH0355253B2 (en) | 1991-08-22 |
Family
ID=12457303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3599184A Granted JPS60180725A (en) | 1984-02-29 | 1984-02-29 | Discharge machining power supply |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60180725A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61260914A (en) * | 1985-05-15 | 1986-11-19 | Mitsubishi Electric Corp | Power source for electric discharge machining |
JP2006263907A (en) * | 2005-02-28 | 2006-10-05 | Tokyo Univ Of Agriculture & Technology | Electric discharge machine |
-
1984
- 1984-02-29 JP JP3599184A patent/JPS60180725A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61260914A (en) * | 1985-05-15 | 1986-11-19 | Mitsubishi Electric Corp | Power source for electric discharge machining |
JP2006263907A (en) * | 2005-02-28 | 2006-10-05 | Tokyo Univ Of Agriculture & Technology | Electric discharge machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0355253B2 (en) | 1991-08-22 |
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