JPH024721U - - Google Patents
Info
- Publication number
- JPH024721U JPH024721U JP8365888U JP8365888U JPH024721U JP H024721 U JPH024721 U JP H024721U JP 8365888 U JP8365888 U JP 8365888U JP 8365888 U JP8365888 U JP 8365888U JP H024721 U JPH024721 U JP H024721U
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor switch
- current source
- constant current
- monostable multivibrator
- parallel
- 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
- 239000004065 semiconductor Substances 0.000 claims description 8
- 238000009760 electrical discharge machining Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
第１図はこの考案の一実施例による放電加工用
電源装置の接続図、第２図はこの考案の動作を示
すタイムチヤート、第３図は従来の放電加工用電
源装置、第４図は従来例の動作を示すタイムチヤ
ート、第５図はこの考案の他の実施例の接続図で
ある。
１は被加工物、２は電極、３は第１の直流定電
流源、４は電圧クランプ回路、５は第１の半導体
スイツチ、７は第２の直流定電流源、９は第２の
半導体スイツチ、１０は判別回路、１２は単安定
マルチバイブレータ、１４は第２の半導体スイツ
チの制御回路。なお、図中、同一符号は同一、又
は相当部分を示す。
Fig. 1 is a connection diagram of a power supply device for electrical discharge machining according to an embodiment of this invention, Fig. 2 is a time chart showing the operation of this invention, Fig. 3 is a conventional power supply device for electrical discharge machining, and Fig. 4 is a conventional power supply device for electrical discharge machining. A time chart showing the operation of this example is shown, and FIG. 5 is a connection diagram of another embodiment of this invention. 1 is a workpiece, 2 is an electrode, 3 is a first DC constant current source, 4 is a voltage clamp circuit, 5 is a first semiconductor switch, 7 is a second DC constant current source, 9 is a second semiconductor 10 is a discrimination circuit, 12 is a monostable multivibrator, and 14 is a control circuit for the second semiconductor switch. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
された第一の直流定電流源、同じく加工間隙に並
列に接続されかつ第１の直流定電流源による電流
と相加わるように接続された第２の直流定電流源
とダイオードから成る直列回路、同じく加工間隙
に並列に接続されかつ加工間隙の正極側から直流
電源の正極側に電流が流れ込むように接続された
第１の半導体スイツチ、前記第２の直流定電流源
の出力端に並列に接続された第２の半導体スイツ
チ、加工間隙の電圧が所定の電圧以下であること
を判別する判別回路、前記第１の半導体スイツチ
がオフになつた後所定の時間後動作する単安定マ
ルチバイブレータ、前記判別回路、単安定マルチ
バイブレータの出力及び前記第１の半導体スイツ
チの状態を入力としその論理演算により前記第２
の半導体スイツチのオン、オフを制御するための
信号を第２の半導体スイツチに出力する制御回路
、からなる放電加工用電源装置。 A first DC constant current source connected in parallel to the machining gap consisting of the workpiece and the electrode; a series circuit consisting of a DC constant current source and a diode; a second semiconductor switch connected in parallel to the output terminal of the second DC constant current source, a discrimination circuit for determining whether the voltage in the machining gap is below a predetermined voltage, and the first semiconductor switch being turned off. A monostable multivibrator that operates after a predetermined period of time, the discrimination circuit, the output of the monostable multivibrator, and the state of the first semiconductor switch are input, and the logical operation thereof determines the second
A power supply device for electrical discharge machining, comprising a control circuit that outputs a signal for controlling on/off of a second semiconductor switch to a second semiconductor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8365888U JPH024721U (en) | 1988-06-24 | 1988-06-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8365888U JPH024721U (en) | 1988-06-24 | 1988-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH024721U true JPH024721U (en) | 1990-01-12 |
Family
ID=31308373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8365888U Pending JPH024721U (en) | 1988-06-24 | 1988-06-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH024721U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49121576U (en) * | 1973-02-13 | 1974-10-17 | ||
| WO2006046630A1 (en) * | 2004-10-28 | 2006-05-04 | Mitsubishi Denki Kabushiki Kaisha | Electric discharge machining power supply apparatus, and electric discharge machining method |
-
1988
- 1988-06-24 JP JP8365888U patent/JPH024721U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49121576U (en) * | 1973-02-13 | 1974-10-17 | ||
| WO2006046630A1 (en) * | 2004-10-28 | 2006-05-04 | Mitsubishi Denki Kabushiki Kaisha | Electric discharge machining power supply apparatus, and electric discharge machining method |
| US8168914B2 (en) | 2004-10-28 | 2012-05-01 | Mitsubishi Electric Corporation | Electric-discharge-machining power supply apparatus and electric discharge machining method |
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