JPS56163834A - State detector for electric discharge machining - Google Patents

State detector for electric discharge machining

Info

Publication number
JPS56163834A
JPS56163834A JP6779480A JP6779480A JPS56163834A JP S56163834 A JPS56163834 A JP S56163834A JP 6779480 A JP6779480 A JP 6779480A JP 6779480 A JP6779480 A JP 6779480A JP S56163834 A JPS56163834 A JP S56163834A
Authority
JP
Japan
Prior art keywords
gate circuit
circuit
signal
output waveform
discharge
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
Application number
JP6779480A
Other languages
Japanese (ja)
Other versions
JPS6020136B2 (en
Inventor
Yasuo Suzuki
Masakazu Kishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Via Mechanics Ltd
Original Assignee
Hitachi Seiko Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Seiko Ltd filed Critical Hitachi Seiko Ltd
Priority to JP6779480A priority Critical patent/JPS6020136B2/en
Publication of JPS56163834A publication Critical patent/JPS56163834A/en
Publication of JPS6020136B2 publication Critical patent/JPS6020136B2/en
Expired legal-status Critical Current

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
    • B23H1/024—Detection of, and response to, abnormal gap conditions, e.g. short circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

PURPOSE:To facilitate the determination of machining conditions and to attain stable electric discharge machining by providing a detecting circuit for detecting the state of discharge and a merging circuit capable of merging the output signals of the detecting circuit and of detecting the duration of the discharge state. CONSTITUTION:Set voltages E1, E2 and E3 are set by level setting circuits 6, 7 and 8. The discharge state is detected and dicriminated by timing pulses T1, T2 and T3. In normal discharge detection, the output waveform signals of the first comparator-amplifier 9 and the second comparator-amplifier 10 are applied to an AND gate circuit 12 which in turn provides an output waveform signal. The output waveform signal of an AND gate circuit 13 is dependent on the output signal and the timing pulse T1 of the third comparator-amplifier 11 set by the third level setting circuit 8. The output waveform signal of an AND gate circuit 15 is determined by three inputs to the AND gate circuit 15, namely, the signal and the timing pulse T2 of a flip flop 14 and the waveform of the AND gate circuit 12. The output waveform signal of the AND gate circuit 15 represents the normal discharge discriminating signal.
JP6779480A 1980-05-23 1980-05-23 Electric discharge machining status detection device Expired JPS6020136B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6779480A JPS6020136B2 (en) 1980-05-23 1980-05-23 Electric discharge machining status detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6779480A JPS6020136B2 (en) 1980-05-23 1980-05-23 Electric discharge machining status detection device

Publications (2)

Publication Number Publication Date
JPS56163834A true JPS56163834A (en) 1981-12-16
JPS6020136B2 JPS6020136B2 (en) 1985-05-20

Family

ID=13355207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6779480A Expired JPS6020136B2 (en) 1980-05-23 1980-05-23 Electric discharge machining status detection device

Country Status (1)

Country Link
JP (1) JPS6020136B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0649696A1 (en) * 1993-10-22 1995-04-26 Korea Atomic Energy Research Institute Method for classifying discharge machining wave patterns, and method for preventing arcs based on the classification of the discharge machining wave in discharge machining apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008047452A1 (en) * 2006-10-20 2008-04-24 Mitsubishi Electric Corporation Power supply control unit of electric discharge machine
CN101291768B (en) * 2006-10-20 2012-05-02 三菱电机株式会社 Power supply control apparatus for discharging processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0649696A1 (en) * 1993-10-22 1995-04-26 Korea Atomic Energy Research Institute Method for classifying discharge machining wave patterns, and method for preventing arcs based on the classification of the discharge machining wave in discharge machining apparatus

Also Published As

Publication number Publication date
JPS6020136B2 (en) 1985-05-20

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