JPS6421348A - Leakage magnetism flaw detection - Google Patents
Leakage magnetism flaw detectionInfo
- Publication number
- JPS6421348A JPS6421348A JP17732687A JP17732687A JPS6421348A JP S6421348 A JPS6421348 A JP S6421348A JP 17732687 A JP17732687 A JP 17732687A JP 17732687 A JP17732687 A JP 17732687A JP S6421348 A JPS6421348 A JP S6421348A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- flaw detection
- coil
- search coil
- detection probe
- 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
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
PURPOSE:To enable highly sensitive detection of a fine defect, by magnetizing an object to be inspected using a high-pass high frequency AC to detect a flaw by means of a flaw detection probe comprising a small-dia. search coil. CONSTITUTION:A yoke (magnetizer) 21 is made up to a yoke 22 and a magnetizing coil 23 is mounted with a mounting bolt 26 in a mounting recess 25 formed on a yoke support plate 24. A flaw detection probe 29 for detecting a leakage magnetic flux is provided on the yoke 21 as attachment. The frequency of a magnetization AC to energize the magnetizing coil 23 is set at a high pass of 6-12kHz while the diameter of a search coil 29A of the flaw detection probe 29 ranges 1-6mm. This can reduce a surface product of the search coil 29A to suppress a higher temperature of the search coil 29A as affected by heat generation of the yoke 21 thereby enabling a less permeation depth of a magnetic flux with the magnetization of the object to be inspected by a high- pass high frequency AC.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17732687A JPS6421348A (en) | 1987-07-17 | 1987-07-17 | Leakage magnetism flaw detection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17732687A JPS6421348A (en) | 1987-07-17 | 1987-07-17 | Leakage magnetism flaw detection |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6421348A true JPS6421348A (en) | 1989-01-24 |
Family
ID=16029018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17732687A Pending JPS6421348A (en) | 1987-07-17 | 1987-07-17 | Leakage magnetism flaw detection |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6421348A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02221857A (en) * | 1989-02-22 | 1990-09-04 | Hara Denshi Sokki Kk | Rotary head mechanism of rotary leakage magnetic flux flaw detecting machine |
JPH11230945A (en) * | 1998-02-09 | 1999-08-27 | Hitachi Building Systems Co Ltd | Magnetic flaw-detecting device of wire rope |
US6479992B2 (en) * | 2000-07-12 | 2002-11-12 | Nkk Corporation | Leakage flux flaw detecting method and method for manufacturing hot rolled steel sheet using the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS506682B1 (en) * | 1966-07-13 | 1975-03-17 | ||
JPS6271854A (en) * | 1985-09-25 | 1987-04-02 | Shimadzu Corp | Flaw detector using leaked magnetic flux |
-
1987
- 1987-07-17 JP JP17732687A patent/JPS6421348A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS506682B1 (en) * | 1966-07-13 | 1975-03-17 | ||
JPS6271854A (en) * | 1985-09-25 | 1987-04-02 | Shimadzu Corp | Flaw detector using leaked magnetic flux |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02221857A (en) * | 1989-02-22 | 1990-09-04 | Hara Denshi Sokki Kk | Rotary head mechanism of rotary leakage magnetic flux flaw detecting machine |
JPH11230945A (en) * | 1998-02-09 | 1999-08-27 | Hitachi Building Systems Co Ltd | Magnetic flaw-detecting device of wire rope |
US6479992B2 (en) * | 2000-07-12 | 2002-11-12 | Nkk Corporation | Leakage flux flaw detecting method and method for manufacturing hot rolled steel sheet using the same |
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