JPS645727A - Electric discharge processing machine - Google Patents

Electric discharge processing machine

Info

Publication number
JPS645727A
JPS645727A JP16168587A JP16168587A JPS645727A JP S645727 A JPS645727 A JP S645727A JP 16168587 A JP16168587 A JP 16168587A JP 16168587 A JP16168587 A JP 16168587A JP S645727 A JPS645727 A JP S645727A
Authority
JP
Japan
Prior art keywords
discharge
abnormal
rate
pulses
change
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
JP16168587A
Other languages
Japanese (ja)
Other versions
JPH0665444B2 (en
Inventor
Hidetoshi Kawazu
Takuji Magara
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 JP16168587A priority Critical patent/JPH0665444B2/en
Publication of JPS645727A publication Critical patent/JPS645727A/en
Publication of JPH0665444B2 publication Critical patent/JPH0665444B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

PURPOSE:To avoid abnormal processing and accomplish stable and effective processings by determining the rate of change in the ratio of electric discharge number-of-pulses generated in No.1 and No.2 divisions of time among electric discharge in the specified number of pulses or specified time, and thereupon judging any abnormal processing. CONSTITUTION:A Td measuring apparatus 12 measures the no-load time Td of each discharge waveform, and a discharge waveform classifier 13 classifies the discharge pulses into immediate discharge D1, normal discharge D2, and open D3, which are counted by counters 14-16, and according to the determined frequency a controller 18 makes servo feeding of electrode. On the other hand, No.1 calculator 20 calculates D1/D2 while No.2 calculator 22 the rate of change of D1/D2 with the aid of memory 21, and on the basis of the calculations a processing condition judging device 27 judges whether it is normal or abnormal upon the rate of change exceeding the specified level, and if abnormal, a controller 28 makes automatic changeover of electrode feed control condition (servo reference voltage). This avoids abnormal processing certainly to accomplish stable and effective processings.
JP16168587A 1987-06-29 1987-06-29 Electric discharge machine Expired - Lifetime JPH0665444B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16168587A JPH0665444B2 (en) 1987-06-29 1987-06-29 Electric discharge machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16168587A JPH0665444B2 (en) 1987-06-29 1987-06-29 Electric discharge machine

Publications (2)

Publication Number Publication Date
JPS645727A true JPS645727A (en) 1989-01-10
JPH0665444B2 JPH0665444B2 (en) 1994-08-24

Family

ID=15739902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16168587A Expired - Lifetime JPH0665444B2 (en) 1987-06-29 1987-06-29 Electric discharge machine

Country Status (1)

Country Link
JP (1) JPH0665444B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02190722A (en) * 1989-01-20 1990-07-26 Tokai Carbon Co Ltd Abnormality detector for temperature measuring equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02190722A (en) * 1989-01-20 1990-07-26 Tokai Carbon Co Ltd Abnormality detector for temperature measuring equipment

Also Published As

Publication number Publication date
JPH0665444B2 (en) 1994-08-24

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