JPS60155321A - Power source for electric discharge machining - Google Patents
Power source for electric discharge machiningInfo
- Publication number
- JPS60155321A JPS60155321A JP1227184A JP1227184A JPS60155321A JP S60155321 A JPS60155321 A JP S60155321A JP 1227184 A JP1227184 A JP 1227184A JP 1227184 A JP1227184 A JP 1227184A JP S60155321 A JPS60155321 A JP S60155321A
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- circuit
- voltage
- current
- diode
- 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
- 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
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は放電加工用電源の改良に関するものである、
〔従来技術〕
従来この種の装置として第１図に示すものがあつｆ、：
、、図において（１）は血流電源、（２）はスイ・ツチ
ング素子、（３）はタイオード、（４）は放電加工用電
極、（５）は被加工物、（６）はスイッチング素子（２
）のオンオフを制御する制御回路、（７）は定電圧回路
、（８）は前記定電圧回路（７）の入力側に置かれｒコ
コンテンサ、（９）は定電圧回路（７）のスイ・・Ｉチ
ンク紫子、αｔｉ ハｉ抗器、αυはスイ・ツチンク素
子（９）のオンオフを制御する制御回路、θηは回路中
の配線等によシ、浮遊インダクタンスである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an improvement of a power source for electric discharge machining. [Prior Art] A conventional device of this type is shown in Fig. 1.
In the figure, (1) is a blood flow power source, (2) is a switching element, (3) is a diode, (4) is an electrode for electrical discharge machining, (5) is a workpiece, and (6) is a switching element. (2
), (7) is a constant voltage circuit, (8) is a capacitor placed on the input side of the constant voltage circuit (7), and (9) is a switch of the constant voltage circuit (7).・αti high resistance resistor, αυ is a control circuit that controls on/off of the switch element (9), and θη is a stray inductance caused by wiring in the circuit.
次に動作について説明する２血流電−（１）より放電加
工用電極（４）及び被加工物（５）で杉成さ第１る微小
間隙（＠ｉ間）に至る回路はスイ・ツチング素子（２）
を除けば、抵抗器などは含まない無抵抗回路となってい
る。しｆこがってスイ・ソチング素子（２）のオン状態
においては、極間の絶縁が破られると極間電流は直流電
源（１）の電圧と回路の浮遊インダクタンスで決る傾き
で立上る。ま１こスイッチング素子（２）のターンオフ
時に回路中の浮遊インダクタンス（２）に蓄えられ１こ
エネルギーによ−・て、スイッチング素子の電圧は急激
に上昇し、タイオード（３）を通して定電圧回路（７）
のコンデンサ（８）を充電する。定電圧回路（７）は、
該コンデンサ（８）の電圧を一定化するようにトランジ
スタ（９）のオンオフのテユーテノを制御するように構
成されており、コンデンサ（８）に一時的に蓄えら才１
１こエネルギーは最終的には抵抗器Ｑｌによって消費さ
れる。Next, the operation will be explained.The circuit from the blood flow current (1) to the first minute gap (between @i) between the electrode for electrical discharge machining (4) and the workpiece (5) is a sui-tsuching. Element (2)
Other than this, it is a non-resistance circuit that does not include any resistors. Therefore, when the switching element (2) is in the ON state, when the insulation between the electrodes is broken, the current between the electrodes rises at a slope determined by the voltage of the DC power supply (1) and the stray inductance of the circuit. When the switching element (2) is turned off, the voltage of the switching element rapidly increases due to the energy stored in the stray inductance (2) in the circuit, and the voltage of the switching element (2) rises rapidly through the diode (3) to the constant voltage circuit ( 7)
Charge the capacitor (8). The constant voltage circuit (7) is
It is configured to control the on/off switching of the transistor (9) so as to keep the voltage of the capacitor (8) constant, and the voltage temporarily stored in the capacitor (8) is
This energy is ultimately dissipated by resistor Ql.
ｆｉ１図において極間を流れる電流Ｉはスイ・ソチング
素子（２）電流れる電流■１とタイオード（３）に流れ
込む電流１２との和で表わされ、各々第２図（ａ）。In Fig. fi1, the current I flowing between the poles is represented by the sum of the current 1 flowing through the switching element (2) and the current 12 flowing into the diode (3), respectively, as shown in Fig. 2(a).
（ｂｌ、 （Ｃ）の通りである、スイ、ソチング素子（
２）のタージオン時の電流立上りの傾きはほぼＥ＋−Ｖ
ｙで表り
わされ、一方、ターンオフ時の電流立下りの傾き電源（
１）の電圧、Ｅ２は定電圧回路（７）の電圧、Ｖｙは極
間ノアーク市圧、Ｌは回路の浮遊インダクタンスである
。第２図（ｄ）、（ｅりは各々スイリチング素子（２）
、 （９）のオン、オフ状態を表わす、従来の放電加工
用電源装置は以上のように構成されているので、スイリ
チング素子（２）がターンオフし１こ時に回路の浮遊イ
ンダクタンスに蓄えられる電磁エネルギー、Ｌｉｐ （
ｌｐはターンオフ時のピーク電流）は最終的には極間で
１００％消費されることなく抵抗器αＯにまって大半が
熱エネルギーとして消費される、この１こめ放電加工用
電源として電力効率が低く、まＴこ抵抗器の発熱のＴこ
めに本来不要な冷却装置を必要とする場合もあり、装置
全体を小形化しにくいなどの欠点かあつ１こ８〔発明の
概要〕
この発明は上記のような従来のものの欠点を除去する１
こめになさオ゛１ｆこもので、スイリチング素子のター
ンオフ時に回路のインダクタンスに蓄えられｆこ電磁エ
ネルギーをもとの血流電源に回生ずることにより、重力
効率が高くま１こ小形化できる放電加工用電源装置を提
供することを目的にしている。(bl, as shown in (C), the switching element (
2) The slope of the current rise at the time of turn-on is approximately E+-V
y, and on the other hand, the slope of the current fall at turn-off is expressed as the power supply (
1), E2 is the voltage of the constant voltage circuit (7), Vy is the voltage between electrodes, and L is the stray inductance of the circuit. Fig. 2(d) and (e are respectively switching elements (2)
, (9) shows the on and off states.Since the conventional electric discharge machining power supply device is configured as described above, the electromagnetic energy stored in the stray inductance of the circuit when the switching element (2) turns off is 1. , Lip (
(lp is the peak current at turn-off) is not 100% consumed between the poles, but is stored in the resistor αO and most of it is consumed as thermal energy, which has low power efficiency as a power source for electrical discharge machining. However, there are drawbacks such as an unnecessary cooling device being required in some cases to absorb the heat generated by the resistor, and making it difficult to downsize the entire device.8 [Summary of the Invention] Eliminate the drawbacks of conventional ones 1
The electromagnetic energy stored in the inductance of the circuit when the switching element is turned off is regenerated back to the original blood flow power source, so it has high gravitational efficiency and can be miniaturized for electrical discharge machining. The purpose is to provide power supplies.
以下、この発明の一実施例を図について説明する８第３
図において（２１１）、（２ｈ）はスイ・ソチング素子
、（８ａ）、（８ｂ）はダイオード、（６ａ）はスイッ
チング素子（２ａ）のオンオフを制御する制御回路、（
６ｂ）はスイ・ソチング素子（２ｂ）のオンオフを制御
する制御回路、αＪはスイッチング素子（２ａ）、（２
ｂ）が同期して同時にオンオフするようにする１こめの
同期回路、α→は直流電源（１）の出力コンデンサであ
る、
第８図において、スイ・・ノチンク素子（２Ｂ）、（２
ｂ）がオン状態の時、極間の絶縁が破１１るとスイ・・
・チング素子を通して電流■１ が流れる。この時の電
流は直流電源（１）の電圧Ｅ１ と回路の浮遊インダク
但しｖｙは極間のアーク電圧、ま１こスイ・ソチング素
子（２）のターンオフ時には回路中の浮遊インダクタン
ス（２）に図示の方向に電圧が誘起され、こＡどはダイ
オード（８ａ）、（８ｂ）が導通しこれらのダイオード
を通して電流Ｉ２が流れる。このとき電流■２は傾き−
Ｅ−４ｙ−Ｃ，立ち下が６゜。ｏ、電流１４よ向り
流電源（１）の出力側コンデンサ０荀を充電するととも
に、極間にも流れ加工エネルギーとしても消費される。Hereinafter, one embodiment of the present invention will be explained with reference to the figures.
In the figure, (211) and (2h) are switching elements, (8a) and (8b) are diodes, (6a) is a control circuit that controls the on/off of the switching element (2a), and (
6b) is a control circuit that controls on/off of the switching element (2b), αJ is a switching element (2a), (2
b) is a synchronous circuit that turns on and off at the same time, and α→ is the output capacitor of the DC power supply (1).
When b) is in the on state, if the insulation between the electrodes breaks 11, the switch will occur.
・Current ■1 flows through the switching element. At this time, the current is the voltage E1 of the DC power supply (1) and the floating inductance of the circuit. However, vy is the arc voltage between the poles, and when the switching element (2) is turned off, the floating inductance (2) in the circuit is shown in the figure. A voltage is induced in the direction of A, and the diodes (8a) and (8b) become conductive and current I2 flows through these diodes. At this time, the current ■2 has a slope of -
E-4y-C, fall is 6°. o, the current 14 charges the output side capacitor 0 of the countercurrent power source (1), and also flows between the electrodes and is consumed as processing energy.
回路中の浮遊インダクタンス（２）のエネルギーがコン
テンサα荀 充電されま１こ極間にて加工エネルギーと
して消費されるとともに、回路中の浮遊インダクタンス
０２の両端に発生する電圧は低下しやがてタイオード（
８ａ）、（３ｂ月ま非導通となる、一方コンテンサα引
こ蓄えらね−こエネルギーは、スイ、・ノナンク素子（
２Ｂ）、（２ｂ）が次にターンオンし１こ時に、スイ・
・・ナング素子（２ａ）、（２ｈ）＆通して極間に供給
されることはいうまでもない、スイ・ノチング素子（２
ａ）、（２１＋）は同時にオン、オフ動作を繰り返すよ
う、同期回路（至）によって制御される７ま１こ極間に
流れるピーク電流の大きさは血流電源（１）の電圧Ｅ１
と回路の浮遊インダクタンス（２）の値りが一疋なら
は、スイ・・ノチング素子（２ａ）、（２ｂ）のオン時
間幅によって制御可能である。The energy of the stray inductance (2) in the circuit is charged between the capacitor α1 and consumed as processing energy, and the voltage generated across the stray inductance (02) in the circuit decreases and eventually becomes a diode (
8a), (3b becomes non-conductive, while the energy stored in the capacitor α is absorbed by the non-conductive element (
2B), (2b) turns on next and at the same time, the switch is turned on.
...Needless to say, it is supplied between the poles through the Nang elements (2a), (2h) & the sui-noting element (2
a) and (21+) are controlled by a synchronous circuit (to) so that they repeat on and off operations at the same time.The magnitude of the peak current flowing between the 7 and 1 poles is determined by the voltage E1 of the blood flow power supply (1).
If the value of the stray inductance (2) of the circuit is one bit, it can be controlled by the on-time width of the switch notching elements (2a) and (2b).
なお、上記実施例では、被加工物（５）から放電加工用
電極（４）へ電流が流れるよう接続し１こが、被加工物
（５）と放電加工用電極（４）とを入ノ１かえてもよい
。In the above embodiment, the workpiece (5) is connected to the electric discharge machining electrode (4) so that a current flows therebetween. You can change it by 1.
ｔｆ二上記実施例では、スイ・ソチング素子（２Ｂ）。tf2 In the above embodiment, the switch soching element (2B).
（２ｂ）として、パワーＭＯ８−ＦＥＴを使用し１こ場
合について説明しｒこが、バイポーラ形のトランジスタ
やサイリスク等の半導体スイ、・Ｊチング素子であって
もよい−まＴこスイッチングｉ子（２ａ）、 （２ｂ）
やダイオード（８ａ）、（８ｂ月こついて２個以上並列
に運転してもよく、上記実施例と同様の効果を奏する。As (2b), we will explain the case where a power MO8-FET is used, and it may also be a bipolar transistor, a semiconductor switch such as a silice, or a switching element. 2a), (2b)
Alternatively, two or more diodes (8a) and (8b) may be operated in parallel, and the same effect as in the above embodiment can be obtained.
以上Ｃ）ようにこの発明によれは、無抵抗スイリチンク
回路のスイ・ソチンク素子かターンオフ時に回路の浮遊
インククタンスに蓄えられている電磁エネルギーを直流
電源側に回生ずるように構成し１こので、放電加工用電
極の電力効率を従来のものより同上でき、ま１こ、抵抗
器のような発熱体を装置内に含まない１こめ放電、１１
１１１用電源自体を小形化できるという効果がある。As described above in C), according to the present invention, the switching element of the non-resistance switching circuit is configured to regenerate the electromagnetic energy stored in the floating inktance of the circuit to the DC power supply side when it is turned off (1). The power efficiency of the electrode for electrical discharge machining can be improved by 11 times more than that of conventional ones.
This has the effect that the 111 power supply itself can be made smaller.
＠１図は従来の放１か加工彫Ｉル七を示す接続図、第２
図は第１図における各部のタイムチャート、第８図はこ
の発明の一実施例による放電加工用電源装置を示す接λ
′・１ａ図、第４図は第３図に、↑ｊける各部のタイム
チャートである、
図に１５いて（１）は直流ｉｓ、（２ａ）はＮｒ、 ｌ
ｏ＞−列回路のスイ・・・チング紮子、（２ｂ）は第２
の直列回路のスイ・リチング素子、（３ａ）は第１の直
列回路のタイオード、（８ｈ）は第２の直列回路のクイ
オード、（４）は放電加工用電源、（５）は附加１物、
（６ａ）はスイ、ソチンク素子（２ａ ）のオンオフ１
１１ｍ回路、（６ｂ）はスイ・ソチング素子（２１１）
のオンオフ制御回路である、
なお、図中、同一符号は同−又は相当部分菅示−４ｌ−
。
代理人 大 岩 増 雄
第１図
第 ２ 図
二
−ヤ
第３図
第４図@Figure 1 is a connection diagram showing the conventional H1 or machining ILE7, and the 2nd figure is
The figure is a time chart of each part in Fig. 1, and Fig. 8 is a connection diagram showing a power supply device for electrical discharge machining according to an embodiment of the present invention.
'・Figure 1a and Figure 4 are time charts of each part in Figure 3 and ↑j. In Figure 15, (1) is DC is, (2a) is Nr, l
o>- column circuit switching ligature, (2b) is the second
(3a) is the diode of the first series circuit, (8h) is the diode of the second series circuit, (4) is the electric discharge machining power supply, (5) is an additional item,
(6a) is a switch, the on/off 1 of the Sochinku element (2a)
11m circuit, (6b) is the sui-soching element (211)
This is an on/off control circuit. In the figures, the same reference numerals indicate the same or corresponding parts.
. Agent Masuo Oiwa Figure 1 Figure 2 Figure 2 Figure 3 Figure 4
Claims (1)
加工物と電極の間にパルス性、放電を発生させ、その放
電エネルギーにより被加工物を融解し・ながら加工する
放電加工機において、血流−′源と、該直流隼゛源の正
極と負極との間に接続され且つスイ・リチング素子とタ
イオードから成る第１Ｑ）ｎ列回路と該第１の直列回路
と同じく前記血流電源の正極と負極との間に接続さね、
且つ第１の直列回路とはスイッチング素子とタイオード
の接続順序が逆にな−・１こ第２の直列回路と、前記第
】のｎ列回路のスイ・ソチング素子とダイオードとの接
続ｒと前記第２の直列回路のスイ・ソチング素子とダイ
オードとの接続点との間に接続され１こ放電加工用電極
及び被加工物と、前記第１のスイッチング素子と前記第
２のスイッチング素子とが同時にオン状態、ま１こはオ
フ状態になるようオン、オフを制御する制御回路とを備
え１こ放電加工用電源装置。In an electric discharge machine, an electrode is placed opposite the workpiece through a small gap, a pulsed electric discharge is generated between the workpiece and the electrode, and the workpiece is melted and machined by the discharge energy. , a blood flow source, and a first Q) n-series circuit connected between the positive and negative electrodes of the direct current source and consisting of a switching element and a diode; Connect between the positive and negative poles of the power supply,
In addition, the connection order of the switching elements and diodes is reversed from that of the first series circuit.The second series circuit has the connection r between the switching element and the diode of the n-th column circuit, and the connection order of the switching element and the diode. An electrical discharge machining electrode and a workpiece connected between the connection point of the switching element and the diode of the second series circuit, and the first switching element and the second switching element are connected at the same time. A power supply device for electrical discharge machining, which is equipped with a control circuit that controls ON and OFF so that one is in an on state and the other is in an off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1227184A JPS60155321A (en) | 1984-01-26 | 1984-01-26 | Power source for electric discharge machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1227184A JPS60155321A (en) | 1984-01-26 | 1984-01-26 | Power source for electric discharge machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60155321A true JPS60155321A (en) | 1985-08-15 |
Family
ID=11800699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1227184A Pending JPS60155321A (en) | 1984-01-26 | 1984-01-26 | Power source for electric discharge machining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60155321A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01109023A (en) * | 1987-10-21 | 1989-04-26 | Hoden Seimitsu Kako Kenkyusho Ltd | Power source circuit for electric discharge machining |
| JPH01146618A (en) * | 1987-11-30 | 1989-06-08 | Hoden Seimitsu Kako Kenkyusho Ltd | Power source for electric discharge machining |
| US4967054A (en) * | 1988-02-04 | 1990-10-30 | Fanuc Ltd | Electric-discharge-machining power source |
| US5329088A (en) * | 1992-03-06 | 1994-07-12 | Mitsubishi Denki Kabushiki Kaisha | Electrical discharge power supply circuit |
| US6580048B2 (en) * | 2000-12-01 | 2003-06-17 | Mitsubishi Denki Kabushiki Kaisha | Electrical discharge machining apparatus supplying initial and processing currents |
-
1984
- 1984-01-26 JP JP1227184A patent/JPS60155321A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01109023A (en) * | 1987-10-21 | 1989-04-26 | Hoden Seimitsu Kako Kenkyusho Ltd | Power source circuit for electric discharge machining |
| JPH01146618A (en) * | 1987-11-30 | 1989-06-08 | Hoden Seimitsu Kako Kenkyusho Ltd | Power source for electric discharge machining |
| US4967054A (en) * | 1988-02-04 | 1990-10-30 | Fanuc Ltd | Electric-discharge-machining power source |
| US5329088A (en) * | 1992-03-06 | 1994-07-12 | Mitsubishi Denki Kabushiki Kaisha | Electrical discharge power supply circuit |
| US6580048B2 (en) * | 2000-12-01 | 2003-06-17 | Mitsubishi Denki Kabushiki Kaisha | Electrical discharge machining apparatus supplying initial and processing currents |
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