JPS5647213A - Manufacture of thick-walled steel pipe - Google Patents

Manufacture of thick-walled steel pipe

Info

Publication number
JPS5647213A
JPS5647213A JP12313679A JP12313679A JPS5647213A JP S5647213 A JPS5647213 A JP S5647213A JP 12313679 A JP12313679 A JP 12313679A JP 12313679 A JP12313679 A JP 12313679A JP S5647213 A JPS5647213 A JP S5647213A
Authority
JP
Japan
Prior art keywords
steel pipe
burr
thick
pipe
steel
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
JP12313679A
Other languages
Japanese (ja)
Inventor
Nobutaka Takigawa
Hideaki Shimizu
Osamu Hirano
Tadaaki Taira
Toshiro Ishihara
Katsumi Yoshiura
Koji Yazawa
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 Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP12313679A priority Critical patent/JPS5647213A/en
Publication of JPS5647213A publication Critical patent/JPS5647213A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

PURPOSE: To prevent the generation of cracks at the end face of the steel plate undergoing the bending work, by previously removing the burr from the sheared edge of the plate before forming into the pipe, at manufacturing the steel pipe with the specified thick wall.
CONSTITUTION: At manufacturing the thick-walled steel pipe with the wall thickness shown by t/2R>2% (where, (t) is for the wall thickness, and R is for the neutral radius of the thick wall), the steel plate is sheared and is cold formed into the steel pipe; hereupon, only the burr on the side where the outer surface of the steel pipe coincides with the burr, is cut off or ground off. The removing process for the burr can be attained by only the chamfering work or by cutting off the whole edge. Besides, as the removing method, either one of the machine cut, the gas cutting, etc., can be employed. By the present method, the crack to be generated at the pipe end is perfectly prevented, so that the quality of the steel pipe is improved.
COPYRIGHT: (C)1981,JPO&Japio
JP12313679A 1979-09-27 1979-09-27 Manufacture of thick-walled steel pipe Pending JPS5647213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12313679A JPS5647213A (en) 1979-09-27 1979-09-27 Manufacture of thick-walled steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12313679A JPS5647213A (en) 1979-09-27 1979-09-27 Manufacture of thick-walled steel pipe

Publications (1)

Publication Number Publication Date
JPS5647213A true JPS5647213A (en) 1981-04-28

Family

ID=14853069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12313679A Pending JPS5647213A (en) 1979-09-27 1979-09-27 Manufacture of thick-walled steel pipe

Country Status (1)

Country Link
JP (1) JPS5647213A (en)

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