JPH0329231U - - Google Patents
Info
- Publication number
- JPH0329231U JPH0329231U JP8831889U JP8831889U JPH0329231U JP H0329231 U JPH0329231 U JP H0329231U JP 8831889 U JP8831889 U JP 8831889U JP 8831889 U JP8831889 U JP 8831889U JP H0329231 U JPH0329231 U JP H0329231U
- Authority
- JP
- Japan
- Prior art keywords
- electrical discharge
- machining
- contact detection
- detection circuit
- switching 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000009760 electrical discharge machining Methods 0.000 claims 2
- 238000003754 machining Methods 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
第１図〜第２図のこの考案の一実施例による放
電加工機用接触検出装置を示し、第１図は放電加
工機用接触検出装置を示す回路図、第２図は第１
図における極間電圧ＶＧ、極間電流ＩＧの特性図
、第３図はこの考案の他の実施例を示す回路図、
第４図は第３図におけるＶＧ対ＩＧ特性図、第５
図は同じくこの考案の他の実施例を示す回路図、
第６図は第５図におけるＶＧ対ＩＧ特性図、第７
図は従来の放電加工機用接触検出装置を示す回路
図、第８図は第７図におけるＶＧ対ＩＧ特性図で
ある。
図において、１……電極、２……ワーク、３…
…検出回路電源、４……逆バイアス用抵抗器、５
……スイツチングダイオード、６……逆バイアス
用直流電源、７……逆バイアス用抵抗器である。
なお、図中、同一符号は同一、又は相当部分を示
す。
1 and 2 show a contact detection device for an electrical discharge machine according to an embodiment of this invention, FIG. 1 is a circuit diagram showing the contact detection device for an electrical discharge machine, and FIG.
A characteristic diagram of inter-electrode voltage VG and inter-electrode current IG in the figure, FIG. 3 is a circuit diagram showing another embodiment of this invention,
Figure 4 is the VG vs. IG characteristic diagram in Figure 3, and Figure 5
The figure is a circuit diagram showing another embodiment of this invention.
Figure 6 is the VG vs. IG characteristic diagram in Figure 5, and Figure 7
The figure is a circuit diagram showing a conventional contact detection device for an electric discharge machine, and FIG. 8 is a VG vs. IG characteristic diagram in FIG. 7. In the figure, 1... electrode, 2... workpiece, 3...
...Detection circuit power supply, 4...Reverse bias resistor, 5
. . . switching diode, 6 . . . reverse bias DC power supply, 7 . . . reverse bias resistor.
In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
加工用電極とワーク間に電圧を印加して放電を発
生させて加工を行う放電加工機において、接触検
出回路にスイツチングダイオードをあらたに設け
、このスイツチングダイオードのスイツチング特
性を利用して、検出回路の内部インピーダンスを
段階的に切換えるようにしたことを特徴とする放
電加工用接触検出装置。 In an electrical discharge machine that performs machining by applying a voltage between an electrical discharge machining electrode and a workpiece that face each other with a small gap through a conductive machining fluid to generate electrical discharge, a switching diode is newly installed in the contact detection circuit. A contact detection device for electrical discharge machining, characterized in that the internal impedance of the detection circuit is switched in stages by utilizing the switching characteristics of this switching diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8831889U JPH0329231U (en) | 1989-07-27 | 1989-07-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8831889U JPH0329231U (en) | 1989-07-27 | 1989-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0329231U true JPH0329231U (en) | 1991-03-22 |
Family
ID=31637939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8831889U Pending JPH0329231U (en) | 1989-07-27 | 1989-07-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0329231U (en) |
-
1989
- 1989-07-27 JP JP8831889U patent/JPH0329231U/ja active Pending
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