JPS57138541A - Electric spark machining device - Google Patents

Electric spark machining device

Info

Publication number
JPS57138541A
JPS57138541A JP1971881A JP1971881A JPS57138541A JP S57138541 A JPS57138541 A JP S57138541A JP 1971881 A JP1971881 A JP 1971881A JP 1971881 A JP1971881 A JP 1971881A JP S57138541 A JPS57138541 A JP S57138541A
Authority
JP
Japan
Prior art keywords
electrode
machining
deepest
discriminating circuit
signal
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
JP1971881A
Other languages
Japanese (ja)
Other versions
JPS6224210B2 (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 JP1971881A priority Critical patent/JPS57138541A/en
Priority to US06/347,386 priority patent/US4415791A/en
Priority to DE19823204798 priority patent/DE3204798A1/en
Priority to CH933/82A priority patent/CH657300A5/en
Publication of JPS57138541A publication Critical patent/JPS57138541A/en
Publication of JPS6224210B2 publication Critical patent/JPS6224210B2/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

Abstract

PURPOSE:To obtain an optimum and stable electric discharge machining state all the time so as to increase the accuracy of the shape of a machined hole, by detecting the time when the tip of an electrode has pierced a material to be machined, based on the deepest machining and a rate of movement of the electrode. CONSTITUTION:To detect electrically whether it is the deepest machining or not, an electrode position detecting apparatus 30 and a deepest machining discriminating circuit 33 are provided. The apparatus 30 detects the position of the electrode, and the position signal is fed to the deepest machining discriminating circuit 33 which outputs a signal ''H'' when it is the deepest machining. To detect electrically the rate of movement of the electrode, the electrode position detecting apparatus 30 and an eletrode moving rate discriminating circuit 35 are provided. When piercing has been done, since the output from the deepest machining discriminating circuit 33 is ''H'', and the output signal from the electrode moving rate discriminating circuit 35 is ''H'', an AND circuit 40 feeds a stopping signal to an electric source unit 16 to cut off the power source to complete the machining.
JP1971881A 1981-02-13 1981-02-13 Electric spark machining device Granted JPS57138541A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1971881A JPS57138541A (en) 1981-02-13 1981-02-13 Electric spark machining device
US06/347,386 US4415791A (en) 1981-02-13 1982-02-09 Breakthrough detection means for electric discharge machining apparatus
DE19823204798 DE3204798A1 (en) 1981-02-13 1982-02-11 ELECTRICAL DISCHARGE PROCESSING DEVICE
CH933/82A CH657300A5 (en) 1981-02-13 1982-02-15 SPARK EDM MACHINING DEVICE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971881A JPS57138541A (en) 1981-02-13 1981-02-13 Electric spark machining device

Publications (2)

Publication Number Publication Date
JPS57138541A true JPS57138541A (en) 1982-08-26
JPS6224210B2 JPS6224210B2 (en) 1987-05-27

Family

ID=12007074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1971881A Granted JPS57138541A (en) 1981-02-13 1981-02-13 Electric spark machining device

Country Status (1)

Country Link
JP (1) JPS57138541A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006995A1 (en) * 1985-05-30 1986-12-04 Fanuc Ltd Device for confirming formation of holes in discharge machining apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006995A1 (en) * 1985-05-30 1986-12-04 Fanuc Ltd Device for confirming formation of holes in discharge machining apparatus

Also Published As

Publication number Publication date
JPS6224210B2 (en) 1987-05-27

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