JPS6469946A - Automatic magnetic flaw detector - Google Patents
Automatic magnetic flaw detectorInfo
- Publication number
- JPS6469946A JPS6469946A JP22706487A JP22706487A JPS6469946A JP S6469946 A JPS6469946 A JP S6469946A JP 22706487 A JP22706487 A JP 22706487A JP 22706487 A JP22706487 A JP 22706487A JP S6469946 A JPS6469946 A JP S6469946A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- magnetic flux
- conductor rod
- conductor
- leaking
- 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 Magnetic Means (AREA)
Abstract
PURPOSE:To make it possible to detect flaws on the inner surface of a slender hole automatically and highly accurately, by magnetizing the inner surface of the hole with a conductor red, and moving a scanner including a magnetism sensor along the conductor rod. CONSTITUTION:A conductor rod 10 is arranged at the center of a hole 1c, which is provided in a material under test 1. When a current 11 is made to flow, main magnetic flux 3 is formed around the conductor rod 10. At this time, magnetic poles are not formed in the conductor rod 10. Therefore, attracting force is not generated between the conductor rod 10 and an inner surface 1c of a hole. Since the conductor rod 10 is arranged at the center of the hole 1c, the main magnetic flux 3 has a concentric pattern. Background magnetic flux is not yielded in the hole 1c. The inner surface of the hole 1c is magnetized by the current 11, which flows through the conductor rod 10. When a material defect is present on the inner surface of the hole 1c, leaking magnetic flux is yielded in the vicinity of the material defect. The leaking magnetic flux is detected with a leaking magnetic flux detecting part. The leaking magnetic flux detecting part is moved in the circumferential direction of the hole 1c and the axial direction. The flaws are detected on the entire inner surface of the hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62227064A JPH0833373B2 (en) | 1987-09-10 | 1987-09-10 | Automatic magnetic flaw detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62227064A JPH0833373B2 (en) | 1987-09-10 | 1987-09-10 | Automatic magnetic flaw detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6469946A true JPS6469946A (en) | 1989-03-15 |
JPH0833373B2 JPH0833373B2 (en) | 1996-03-29 |
Family
ID=16854964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62227064A Expired - Lifetime JPH0833373B2 (en) | 1987-09-10 | 1987-09-10 | Automatic magnetic flaw detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0833373B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5323668A (en) * | 1991-11-08 | 1994-06-28 | Toyota Jidosha Kabushiki Kaisha | Apparatus for regulating vehicle transmission line pressure based on throttle opening or engine intake air quantity |
JP2018009867A (en) * | 2016-07-13 | 2018-01-18 | 株式会社Ihi | Leakage flux flaw detection device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5354310U (en) * | 1976-10-12 | 1978-05-10 | ||
JPS5897653A (en) * | 1981-12-08 | 1983-06-10 | Toshiba Corp | Leakage magentism flaw detector for flaw of internal hole surface |
-
1987
- 1987-09-10 JP JP62227064A patent/JPH0833373B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5354310U (en) * | 1976-10-12 | 1978-05-10 | ||
JPS5897653A (en) * | 1981-12-08 | 1983-06-10 | Toshiba Corp | Leakage magentism flaw detector for flaw of internal hole surface |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5323668A (en) * | 1991-11-08 | 1994-06-28 | Toyota Jidosha Kabushiki Kaisha | Apparatus for regulating vehicle transmission line pressure based on throttle opening or engine intake air quantity |
JP2018009867A (en) * | 2016-07-13 | 2018-01-18 | 株式会社Ihi | Leakage flux flaw detection device |
Also Published As
Publication number | Publication date |
---|---|
JPH0833373B2 (en) | 1996-03-29 |
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