JPS57146157A - Magnetic flaw detecting device - Google Patents

Magnetic flaw detecting device

Info

Publication number
JPS57146157A
JPS57146157A JP3155781A JP3155781A JPS57146157A JP S57146157 A JPS57146157 A JP S57146157A JP 3155781 A JP3155781 A JP 3155781A JP 3155781 A JP3155781 A JP 3155781A JP S57146157 A JPS57146157 A JP S57146157A
Authority
JP
Japan
Prior art keywords
magnetizing
yokes
checked
magnetic powder
detected
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
Application number
JP3155781A
Other languages
Japanese (ja)
Inventor
Shigenori Kamimura
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP3155781A priority Critical patent/JPS57146157A/en
Publication of JPS57146157A publication Critical patent/JPS57146157A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
    • G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink

Abstract

PURPOSE:To reduce the number of checking persons to detect defects in all the directions of the outer surface by moving a material to be checked in the axial direction in a spiral state, magnetizing the material in the axial direction and the circumferential direction under the noncontact state, and detecting the defects under the spirally moving state. CONSTITUTION:The material to be tested 1 is spirally rotated and fed by a V roller 2. When the tip part of the material 1 passes the detector at the input side of the flaw detector and the tip part is detected, magnetizing currents are flowed through magnetizing coils 5 and 5' and magnetizing yokes 4 and 4' based on said detected signal. Magnetic powder liquid is sprayed on the surface of the material to be checked 1 from a magnetic powder liquid spraying nozzle 6 at the same time. ACs having the phase difference of 90 deg. are applied to said magnetizing coils 5 and 5' and said magnetizing yokes 4 and 4'. The magnetic powder display pattern, which is generated on the defective part when the material to be checked 1 passes the yokes 4 and 4' can be detected visually or by an ITV and the like at the position of the yokes 4 and 4', i.e. a part AB, through the opening part of the side of a device frame 10.
JP3155781A 1981-03-05 1981-03-05 Magnetic flaw detecting device Pending JPS57146157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3155781A JPS57146157A (en) 1981-03-05 1981-03-05 Magnetic flaw detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3155781A JPS57146157A (en) 1981-03-05 1981-03-05 Magnetic flaw detecting device

Publications (1)

Publication Number Publication Date
JPS57146157A true JPS57146157A (en) 1982-09-09

Family

ID=12334475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3155781A Pending JPS57146157A (en) 1981-03-05 1981-03-05 Magnetic flaw detecting device

Country Status (1)

Country Link
JP (1) JPS57146157A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4694247A (en) * 1984-06-08 1987-09-15 Mecapec S.A. Method and apparatus including a cushion of pulverulent magnetic material for stray field magnetic testing of ferromagnetic parts
EP0326071A2 (en) * 1988-01-26 1989-08-02 Helling Kommanditgesellschaft für Industrieprodukte und Anlagenbau (GmbH & Co.) Method and apparatus for testing with magnetic powder
EP0373444A2 (en) * 1988-12-12 1990-06-20 Tiede Gmbh + Co Rissprüfanlagen Apparatus for magnetizing
US5534775A (en) * 1993-03-16 1996-07-09 Ico, Inc. Method and apparatus for noncontact magnetic particle stray magnetic flux testing of cylindrical members
US6246235B1 (en) 1998-04-22 2001-06-12 Usx Corporation Tubular products inspection
KR20110000526A (en) * 2009-06-26 2011-01-03 티.디.더블유델라웨어인코포레이티드 Pipeline inspection tool with oblique magnetizer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240392A (en) * 1975-09-26 1977-03-29 Sumitomo Metal Ind Ltd Magnetic flaw detection device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240392A (en) * 1975-09-26 1977-03-29 Sumitomo Metal Ind Ltd Magnetic flaw detection device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4694247A (en) * 1984-06-08 1987-09-15 Mecapec S.A. Method and apparatus including a cushion of pulverulent magnetic material for stray field magnetic testing of ferromagnetic parts
EP0326071A2 (en) * 1988-01-26 1989-08-02 Helling Kommanditgesellschaft für Industrieprodukte und Anlagenbau (GmbH & Co.) Method and apparatus for testing with magnetic powder
EP0373444A2 (en) * 1988-12-12 1990-06-20 Tiede Gmbh + Co Rissprüfanlagen Apparatus for magnetizing
US5534775A (en) * 1993-03-16 1996-07-09 Ico, Inc. Method and apparatus for noncontact magnetic particle stray magnetic flux testing of cylindrical members
US6246235B1 (en) 1998-04-22 2001-06-12 Usx Corporation Tubular products inspection
KR20110000526A (en) * 2009-06-26 2011-01-03 티.디.더블유델라웨어인코포레이티드 Pipeline inspection tool with oblique magnetizer

Similar Documents

Publication Publication Date Title
EP0529354B1 (en) Device for monitoring rolling contact bearings
SE8303874D0 (en) DEVICE FOR CRACKET DETECTION
CA1243745A (en) Eddy current flaw detector having rotatable field defining sleeve
JPS57146157A (en) Magnetic flaw detecting device
KR100478528B1 (en) A method and apparatus for inspecting tubes by eddy currents
US3437917A (en) Method of and apparatus for high speed magnetic inspection of tubular goods
US5041786A (en) Method of nondestructively inspecting for flaws in metal stocks including selection of detection coil diameter.
US3075145A (en) Magnetic detection of flaws using mutually coupled coils
JPS61502563A (en) Eddy current flaw detection method and device
JPS57165713A (en) Detector for rotary angle
JPS55140146A (en) Surface flaw detection for continuous casting slab
JPS5229800A (en) Apparatus for detecting effluence of slag in molten metal
JPS5739344A (en) Eddy current flaw detector
JPS5696241A (en) Method and device for magnetic particle test of seam welded steel tube
JPS5767852A (en) Method and apparatus for flaw detection
Dorofeev et al. Electromagnetic Inspection of Metal Surface Layers, at Increased Frequencies
Matikainen et al. An ultrasonic measuring system for submerged gas injection
Snajberk et al. Detection of Surface Defects in Steel Pipes
DE3346774C2 (en)
JPH06109861A (en) Probe device having metal sensor
KHANDETSKII Eddy current detection of layers with an increased concentration of microcracks in carbon-containing composites(Vyiavlenie sloev s povyshennoi kontsentratsiei mikrotreshchin v uglerodosoderzhashchikh kompozitakh vikhretokovym metodom)
JPH0361889A (en) System for detecting exposure of reinforcing bar in alc
JPS56162044A (en) Defect-position marker for material to be inspected
Takenaka et al. Inspection System for Cold Strip Products
JPS55166042A (en) Eddy current inspecting apparatus