JPS57189724A - Electric discharge machining condition detector - Google Patents

Electric discharge machining condition detector

Info

Publication number
JPS57189724A
JPS57189724A JP7350681A JP7350681A JPS57189724A JP S57189724 A JPS57189724 A JP S57189724A JP 7350681 A JP7350681 A JP 7350681A JP 7350681 A JP7350681 A JP 7350681A JP S57189724 A JPS57189724 A JP S57189724A
Authority
JP
Japan
Prior art keywords
voltage
discharge
condenser
gap
work
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
JP7350681A
Other languages
Japanese (ja)
Inventor
Yasuo Suzuki
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 JP7350681A priority Critical patent/JPS57189724A/en
Publication of JPS57189724A publication Critical patent/JPS57189724A/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
    • 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 identify the discharge condition quantitatively and precisely by applying a high voltage pulse charged in a condenser to a work gap, comparing the gap voltage with a multitude of reference voltages, and detecting an abrupt descent of the gap voltage. CONSTITUTION:A high voltage pulse from a pulse power source 1 is charged in a condenser 2, and is further applied between an electrode 3 and a work 4 for performing the discharge work. The work gap voltage is divided by means of resistors, and is detected as a voltage E0. Non-discharge condition detection pulse is output and integrated in a condenser 31 when the gap voltage E0 is higher than a reference voltage E1, and when the voltage E0 is higher than a voltage E2 but no discharge occurs (between CL1 and CL3). A normal discharge is detected by an abrupt descent of the voltage E0 from the condition of E0> E2, and a detection pulse is integrated in a condenser 32. An abnormal arc discharge V4 and a short circuit CL7 are detected by comparing the voltage E0 with the voltage E4, and are integrated in condensers 33, 34 respectively.
JP7350681A 1981-05-18 1981-05-18 Electric discharge machining condition detector Pending JPS57189724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7350681A JPS57189724A (en) 1981-05-18 1981-05-18 Electric discharge machining condition detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7350681A JPS57189724A (en) 1981-05-18 1981-05-18 Electric discharge machining condition detector

Publications (1)

Publication Number Publication Date
JPS57189724A true JPS57189724A (en) 1982-11-22

Family

ID=13520196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7350681A Pending JPS57189724A (en) 1981-05-18 1981-05-18 Electric discharge machining condition detector

Country Status (1)

Country Link
JP (1) JPS57189724A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284919A (en) * 1985-10-08 1987-04-18 Amada Co Ltd Machining condition detecting method and its device for electric discharge machine
JPS6284917A (en) * 1985-10-08 1987-04-18 Amada Co Ltd Abnormal discharge preventing method and its device for electric discharge machine
JPS6284918A (en) * 1985-10-08 1987-04-18 Amada Co Ltd Machining condition detecting method and its device for electric discharge machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284919A (en) * 1985-10-08 1987-04-18 Amada Co Ltd Machining condition detecting method and its device for electric discharge machine
JPS6284917A (en) * 1985-10-08 1987-04-18 Amada Co Ltd Abnormal discharge preventing method and its device for electric discharge machine
JPS6284918A (en) * 1985-10-08 1987-04-18 Amada Co Ltd Machining condition detecting method and its device for electric discharge machine

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