JPS5714482A - Method and apparatus for detecting abnormality in high frequency electric welding - Google Patents

Method and apparatus for detecting abnormality in high frequency electric welding

Info

Publication number
JPS5714482A
JPS5714482A JP8758580A JP8758580A JPS5714482A JP S5714482 A JPS5714482 A JP S5714482A JP 8758580 A JP8758580 A JP 8758580A JP 8758580 A JP8758580 A JP 8758580A JP S5714482 A JPS5714482 A JP S5714482A
Authority
JP
Japan
Prior art keywords
high frequency
abnormality
welding
block
arithmetic
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
JP8758580A
Other languages
Japanese (ja)
Other versions
JPS5910871B2 (en
Inventor
Murao Yamada
Akio Hosooka
Ryoji Ogata
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP8758580A priority Critical patent/JPS5910871B2/en
Publication of JPS5714482A publication Critical patent/JPS5714482A/en
Publication of JPS5910871B2 publication Critical patent/JPS5910871B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Arc Welding Control (AREA)

Abstract

PURPOSE: To detect abnormality quantitatively and remove abnormal part of welding by taking out only variation of measured high frequency characteristic value as a welding characteristic value by signal processing and comparing the size and shape of it with control values.
CONSTITUTION: A current transformer 12 and a transformer 13 detect high frequency current (i) and voltage (e), and inputs to a high frequency characteristic value arithmetic block 102. A power converter 14 converts voltage (e) and current (i) into electric power P and a period arithmetic unit 15 measures period T which is an inverse number of frequency of the voltage (e). In a welding characteristic arithmetic block 103, electric power P and period T are converted to short-term variation P, T by a variation width arithmetic units 16, 17 and sent to abnormality judging block 104 as welding characteristic values. When both of characteristic values P, T exceed the setting value of control value setting units 18, 19, it is judged as abnormal and abnormality detection signals C, C are transmitted. A tracking device 23 of an abnormality treating block 105 actuates a traveling cutter 11 to remove the abnormal part.
COPYRIGHT: (C)1982,JPO&Japio
JP8758580A 1980-06-27 1980-06-27 Abnormality detection method and device for high frequency electric resistance welding Expired JPS5910871B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8758580A JPS5910871B2 (en) 1980-06-27 1980-06-27 Abnormality detection method and device for high frequency electric resistance welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8758580A JPS5910871B2 (en) 1980-06-27 1980-06-27 Abnormality detection method and device for high frequency electric resistance welding

Publications (2)

Publication Number Publication Date
JPS5714482A true JPS5714482A (en) 1982-01-25
JPS5910871B2 JPS5910871B2 (en) 1984-03-12

Family

ID=13919072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8758580A Expired JPS5910871B2 (en) 1980-06-27 1980-06-27 Abnormality detection method and device for high frequency electric resistance welding

Country Status (1)

Country Link
JP (1) JPS5910871B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011029127A (en) * 2009-07-29 2011-02-10 Fuji Electric Systems Co Ltd Load opening detecting method in contact-type electric resistance welded tube welding power source device

Also Published As

Publication number Publication date
JPS5910871B2 (en) 1984-03-12

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