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JPS57138538A - Electric spark machining device - Google Patents

Electric spark machining device

Info

Publication number
JPS57138538A
JPS57138538A JP1971581A JP1971581A JPS57138538A JP S57138538 A JPS57138538 A JP S57138538A JP 1971581 A JP1971581 A JP 1971581A JP 1971581 A JP1971581 A JP 1971581A JP S57138538 A JPS57138538 A JP S57138538A
Authority
JP
Japan
Prior art keywords
machining
servo voltage
change pattern
voltage change
circuit
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
JP1971581A
Other languages
Japanese (ja)
Other versions
JPH0138616B2 (en
Inventor
Shigeo Yamada
Tamio Takawashi
Toshimitsu Sakakibara
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1971581A priority Critical patent/JPS57138538A/en
Priority to US06/347,387 priority patent/US4484051A/en
Priority to DE19823204799 priority patent/DE3204799A1/en
Priority to CH934/82A priority patent/CH656819A5/en
Publication of JPS57138538A publication Critical patent/JPS57138538A/en
Publication of JPH0138616B2 publication Critical patent/JPH0138616B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To obtain an optimum and stable electric discharge machining state at all times, by detecting the time when the tip of an electrode has pierced a material to be machined, based on a servo voltage change pattern and a pressure of a machining liquid, so that the machining is automatically completed. CONSTITUTION:To detect electrically the servo voltage change pattern, a servo voltage detecting apparatus 18, a converter 36 and a servo voltage change pattern discriminating circuit 38 are provided. To detect electrically the pressure of a machining liquid, a machining liquid pressure detecting apparatus 26, a converter 36, a pressurized liquid pressure discriminating circuit 42 and an inverting circuit 46 are detected. When piercing has been done, since the output signal from a servo voltage change pattern discriminating circuit 38 is ''H'', and the output signal from the inverting circuit 46 is ''H'', an AND circuit 40 feeds a stopping signal to an electrical source unit 16 to cut the power source to complete the machining.
JP1971581A 1981-02-13 1981-02-13 Electric spark machining device Granted JPS57138538A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1971581A JPS57138538A (en) 1981-02-13 1981-02-13 Electric spark machining device
US06/347,387 US4484051A (en) 1981-02-13 1982-02-09 Breakthrough detection means for electric discharge machining apparatus
DE19823204799 DE3204799A1 (en) 1981-02-13 1982-02-11 DEVICE FOR ELECTRICAL DISCHARGE PROCESSING OF WORKPIECES
CH934/82A CH656819A5 (en) 1981-02-13 1982-02-15 SPARK EDM MACHINING DEVICE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971581A JPS57138538A (en) 1981-02-13 1981-02-13 Electric spark machining device

Publications (2)

Publication Number Publication Date
JPS57138538A true JPS57138538A (en) 1982-08-26
JPH0138616B2 JPH0138616B2 (en) 1989-08-15

Family

ID=12006983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1971581A Granted JPS57138538A (en) 1981-02-13 1981-02-13 Electric spark machining device

Country Status (1)

Country Link
JP (1) JPS57138538A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011206896A (en) * 2010-03-30 2011-10-20 Mitsubishi Electric Corp Machine and method for fine hole electric discharge machining

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011206896A (en) * 2010-03-30 2011-10-20 Mitsubishi Electric Corp Machine and method for fine hole electric discharge machining

Also Published As

Publication number Publication date
JPH0138616B2 (en) 1989-08-15

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