JPS56134131A - Electric discharge machining apparatus - Google Patents

Electric discharge machining apparatus

Info

Publication number
JPS56134131A
JPS56134131A JP3402780A JP3402780A JPS56134131A JP S56134131 A JPS56134131 A JP S56134131A JP 3402780 A JP3402780 A JP 3402780A JP 3402780 A JP3402780 A JP 3402780A JP S56134131 A JPS56134131 A JP S56134131A
Authority
JP
Japan
Prior art keywords
electric discharge
capacitor
discharge machining
inductance coil
transistor
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
Application number
JP3402780A
Other languages
Japanese (ja)
Inventor
Yoichi Ueishi
Yoshio Eguchi
Hitoshi Miyahara
Tadashi Matsushima
Masatoshi Yamaya
Atsushi Kato
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 JP3402780A priority Critical patent/JPS56134131A/en
Publication of JPS56134131A publication Critical patent/JPS56134131A/en
Pending 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 permit even a DC supply source of low voltage and small capacity to perform electric discharge machining of stable worked surface roughness by jointly using a switching element, an inductance coil and a capacitor. CONSTITUTION:A transistor 6 is turned on/off by a control circuit 13, and while the transistor 6 is conducting, an inductance coil 8 and a capacitor 10 are simultaneously charged with energy. Even after the charging of the capacitor 10 has been completed, a minute current due to a by-pass resistor is flowing through the inductance coil 8. When the transistor 6 is turned off, a high-voltage impulse due to a counter electromotive force generated in the inductance coil 8 is applied through a polarity switch 4 and a diode 9 to a working gap 3 to breakdown the insulation. Then, electric discharge machining is performed by the given amount of working energy stored in the capacitor 10. Thereby, excellent electric discharge machining, by which the worked surface roughness is also stabilized, is made possible.
JP3402780A 1980-03-19 1980-03-19 Electric discharge machining apparatus Pending JPS56134131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3402780A JPS56134131A (en) 1980-03-19 1980-03-19 Electric discharge machining apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3402780A JPS56134131A (en) 1980-03-19 1980-03-19 Electric discharge machining apparatus

Publications (1)

Publication Number Publication Date
JPS56134131A true JPS56134131A (en) 1981-10-20

Family

ID=12402878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3402780A Pending JPS56134131A (en) 1980-03-19 1980-03-19 Electric discharge machining apparatus

Country Status (1)

Country Link
JP (1) JPS56134131A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5399825A (en) * 1991-03-01 1995-03-21 Creare, Inc. Inductor-charged electric discharge machining power supply
US5585014A (en) * 1993-06-30 1996-12-17 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for electrical discharge machining using variable capacitance and variable inductance
EP1208934A2 (en) * 2000-11-21 2002-05-29 Mitsubishi Denki Kabushiki Kaisha Electric discharge machining apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5399825A (en) * 1991-03-01 1995-03-21 Creare, Inc. Inductor-charged electric discharge machining power supply
US5585014A (en) * 1993-06-30 1996-12-17 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for electrical discharge machining using variable capacitance and variable inductance
EP1208934A2 (en) * 2000-11-21 2002-05-29 Mitsubishi Denki Kabushiki Kaisha Electric discharge machining apparatus
US6630641B2 (en) * 2000-11-21 2003-10-07 Mitsubishi Denki Kabushiki Kaisha Electric discharge machining apparatus generating preliminary discharge and machining discharge pulses
EP1208934A3 (en) * 2000-11-21 2006-01-25 Mitsubishi Denki Kabushiki Kaisha Electric discharge machining apparatus

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