JPS5714482A - Method and apparatus for detecting abnormality in high frequency electric welding - Google Patents
Method and apparatus for detecting abnormality in high frequency electric weldingInfo
- 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
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
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)
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 |
-
1980
- 1980-06-27 JP JP8758580A patent/JPS5910871B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5910871B2 (en) | 1984-03-12 |
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