JPS57149075A - Detection of weld defect of electric welded - Google Patents

Detection of weld defect of electric welded

Info

Publication number
JPS57149075A
JPS57149075A JP3476181A JP3476181A JPS57149075A JP S57149075 A JPS57149075 A JP S57149075A JP 3476181 A JP3476181 A JP 3476181A JP 3476181 A JP3476181 A JP 3476181A JP S57149075 A JPS57149075 A JP S57149075A
Authority
JP
Japan
Prior art keywords
areas
edge parts
coils
skelp
kinds
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
JP3476181A
Other languages
Japanese (ja)
Inventor
Yoshiyasu Kitagawa
Michio Okada
Masahiro Takahashi
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP3476181A priority Critical patent/JPS57149075A/en
Publication of JPS57149075A publication Critical patent/JPS57149075A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/08—Seam welding not restricted to one of the preceding subgroups
    • B23K11/087—Seam welding not restricted to one of the preceding subgroups for rectilinear seams
    • B23K11/0873—Seam welding not restricted to one of the preceding subgroups for rectilinear seams of the longitudinal seam of tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

PURPOSE:To improve the efficiency of inspection stages considerably in the process of butt welding the edge parts on both sides of a skelp by disposing detecting coils for melting electric power in the prescribed places in said edge parts and discriminating the kinds of weld defects in accordance with the output changes thereof. CONSTITUTION:In the process of butt welding the edge parts E.E on both sides of a skelp S of an electric welded pipe P, coils CL1-CL8 for detecting welding currents are disposed in one or plural places including a starting point C for discharging of molten steel in partially molten areas B-C from the unmolten areas A-B of the parts E.E or in one or plural places including the weld junction in molten steel discharging areas C-O. In accordance with the outputs of the above-mentioned detecting coils and the results of experiment, the kinds of weld defects are discriminated. According to this method, inspection stages are reduced considerably and the efficiency is improved as compared to those in the prior art.
JP3476181A 1981-03-10 1981-03-10 Detection of weld defect of electric welded Pending JPS57149075A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3476181A JPS57149075A (en) 1981-03-10 1981-03-10 Detection of weld defect of electric welded

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3476181A JPS57149075A (en) 1981-03-10 1981-03-10 Detection of weld defect of electric welded

Publications (1)

Publication Number Publication Date
JPS57149075A true JPS57149075A (en) 1982-09-14

Family

ID=12423292

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3476181A Pending JPS57149075A (en) 1981-03-10 1981-03-10 Detection of weld defect of electric welded

Country Status (1)

Country Link
JP (1) JPS57149075A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015217420A (en) * 2014-05-19 2015-12-07 Ｊｆｅスチール株式会社 Method and apparatus for monitoring electric resistance welding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015217420A (en) * 2014-05-19 2015-12-07 Ｊｆｅスチール株式会社 Method and apparatus for monitoring electric resistance welding

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