JPS54147594A - Wire-cutting electric discharge processing control device - Google Patents

Wire-cutting electric discharge processing control device

Info

Publication number
JPS54147594A
JPS54147594A JP5508378A JP5508378A JPS54147594A JP S54147594 A JPS54147594 A JP S54147594A JP 5508378 A JP5508378 A JP 5508378A JP 5508378 A JP5508378 A JP 5508378A JP S54147594 A JPS54147594 A JP S54147594A
Authority
JP
Japan
Prior art keywords
wire electrode
wire
power source
processing
output
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
JP5508378A
Other languages
Japanese (ja)
Other versions
JPS6216771B2 (en
Inventor
Tetsuro Ito
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 JP5508378A priority Critical patent/JPS54147594A/en
Publication of JPS54147594A publication Critical patent/JPS54147594A/en
Publication of JPS6216771B2 publication Critical patent/JPS6216771B2/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
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/04—Apparatus for supplying current to working gap; Electric circuits specially adapted therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

PURPOSE:To detect disconnection of a wire electrode of a wire cutting machine in a short period of time by switching off processing power source when momentary value of processing voltage became higher than an average value of peak values by more than a key content value. CONSTITUTION:When a wire electrode 2 is disconnected during processing operation, an area between the wire electrode 2 and a work 1 in the processing space becomes decreased, and leak current travelling between them is also decreased increasing equivallent resistance. As a result, a capacitor 18 in a processing power source 14 is charged rapidly allowing a voltage Vg between the wire electrode 2 and the work 1 to go up and it becomes much higher than an average value Vp of the peak values. And therefore, an input V0 of a comparator 56 becomes higher than a constant voltafe Vr making an output of a detection signal e0. In other words, if a wire electrode 2 was disconnected during processing operation, there is an immediate output of a direction signal e0 to detect disconnection of the wire and at the same time an output of a processing power source 14 is switched off.
JP5508378A 1978-05-10 1978-05-10 Wire-cutting electric discharge processing control device Granted JPS54147594A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5508378A JPS54147594A (en) 1978-05-10 1978-05-10 Wire-cutting electric discharge processing control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5508378A JPS54147594A (en) 1978-05-10 1978-05-10 Wire-cutting electric discharge processing control device

Publications (2)

Publication Number Publication Date
JPS54147594A true JPS54147594A (en) 1979-11-17
JPS6216771B2 JPS6216771B2 (en) 1987-04-14

Family

ID=12988811

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5508378A Granted JPS54147594A (en) 1978-05-10 1978-05-10 Wire-cutting electric discharge processing control device

Country Status (1)

Country Link
JP (1) JPS54147594A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027345A1 (en) * 1979-10-13 1981-04-22 Fanuc Ltd. A power source for a wire-cut electric discharge machine, and such a machine including the power source
US4469927A (en) * 1981-05-14 1984-09-04 Fanuc Ltd. Power source arrangement for wire-cut, electric discharge machining
US4559432A (en) * 1982-08-02 1985-12-17 Mitsubishi Denki Kabushiki Kaisha Wire EDM for detecting discharge concentrations using inductance
EP0723832A2 (en) * 1995-01-27 1996-07-31 Fanuc Ltd. Method of detecting breakage of wire electrode during wire electrical discharge machining

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2573514B2 (en) * 1988-05-11 1997-01-22 ファナック株式会社 Wire break position detection device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027345A1 (en) * 1979-10-13 1981-04-22 Fanuc Ltd. A power source for a wire-cut electric discharge machine, and such a machine including the power source
US4469927A (en) * 1981-05-14 1984-09-04 Fanuc Ltd. Power source arrangement for wire-cut, electric discharge machining
US4559432A (en) * 1982-08-02 1985-12-17 Mitsubishi Denki Kabushiki Kaisha Wire EDM for detecting discharge concentrations using inductance
EP0723832A2 (en) * 1995-01-27 1996-07-31 Fanuc Ltd. Method of detecting breakage of wire electrode during wire electrical discharge machining
EP0723832A3 (en) * 1995-01-27 1997-10-08 Fanuc Ltd Method of detecting breakage of wire electrode during wire electrical discharge machining

Also Published As

Publication number Publication date
JPS6216771B2 (en) 1987-04-14

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