JPS57108751A - Detector for defect at screw part - Google Patents

Detector for defect at screw part

Info

Publication number
JPS57108751A
JPS57108751A JP55186191A JP18619180A JPS57108751A JP S57108751 A JPS57108751 A JP S57108751A JP 55186191 A JP55186191 A JP 55186191A JP 18619180 A JP18619180 A JP 18619180A JP S57108751 A JPS57108751 A JP S57108751A
Authority
JP
Japan
Prior art keywords
screw
defect
main body
coil
cut
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
JP55186191A
Other languages
Japanese (ja)
Inventor
Kuniaki Kitamura
Yoshiyuki Tateishi
Kazuhiro Furusawa
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.)
TOKUSHU TORYO KK
Toshiba Corp
Original Assignee
TOKUSHU TORYO KK
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 TOKUSHU TORYO KK, Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical TOKUSHU TORYO KK
Priority to JP55186191A priority Critical patent/JPS57108751A/en
Publication of JPS57108751A publication Critical patent/JPS57108751A/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
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9006—Details, e.g. in the structure or functioning of sensors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

PURPOSE:To detect a defect at a screw part in a quick and accurate way, by cutting a part of the screw part provided to the main body of a defect detector and then mounting a detection coil having a screw surface corresponding to the cut so that a continuous screw surface is formed at the cut area. CONSTITUTION:A screw part 4 to be fitted to another screw part 3 formed on the inner surface of a female screw 2 to be inspected is formed at an edge side of the main body 1 of a defect detector which inspects the female part. The screw thread is cut at a part of the part 4 to accept a detection coil 7 having a surface 6 corresponding to the screw surface. Then the main body 1 is fitted to the screw 2 and turned. Thus the gap between the coil 7 and the screw surface is almost equal between the projected part and the hollow part of the screw part since the tip form of the coil 7 is corresponding to the form of the thread of the screw 2. Thus the defect of the screw 2 can be detected with high accuracy by making use of the leaked mangetic flux.
JP55186191A 1980-12-26 1980-12-26 Detector for defect at screw part Pending JPS57108751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186191A JPS57108751A (en) 1980-12-26 1980-12-26 Detector for defect at screw part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186191A JPS57108751A (en) 1980-12-26 1980-12-26 Detector for defect at screw part

Publications (1)

Publication Number Publication Date
JPS57108751A true JPS57108751A (en) 1982-07-06

Family

ID=16183975

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186191A Pending JPS57108751A (en) 1980-12-26 1980-12-26 Detector for defect at screw part

Country Status (1)

Country Link
JP (1) JPS57108751A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7163335B2 (en) * 2003-05-05 2007-01-16 Ray Dishaw Oilfield thread makeup and breakout verification system and method
CN101893603A (en) * 2010-08-06 2010-11-24 中国石油集团川庆钻探工程有限公司长庆钻井总公司 Thread detection device and crack detection method for drilling tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7163335B2 (en) * 2003-05-05 2007-01-16 Ray Dishaw Oilfield thread makeup and breakout verification system and method
CN101893603A (en) * 2010-08-06 2010-11-24 中国石油集团川庆钻探工程有限公司长庆钻井总公司 Thread detection device and crack detection method for drilling tool

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