JPS643568B2 - - Google Patents

Info

Publication number
JPS643568B2
JPS643568B2 JP8445180A JP8445180A JPS643568B2 JP S643568 B2 JPS643568 B2 JP S643568B2 JP 8445180 A JP8445180 A JP 8445180A JP 8445180 A JP8445180 A JP 8445180A JP S643568 B2 JPS643568 B2 JP S643568B2
Authority
JP
Japan
Prior art keywords
roll
rolls
welding
rectangular
bending
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.)
Expired
Application number
JP8445180A
Other languages
English (en)
Japanese (ja)
Other versions
JPS579526A (en
Inventor
Shozo Watanabe
Seiichiro Ogawa
Hisashi Sogawa
Eikichi Kaji
Akio Akahori
Hirotaku Onda
Hirotsugu Haga
Kazuo Aoki
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
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP8445180A priority Critical patent/JPS579526A/ja
Publication of JPS579526A publication Critical patent/JPS579526A/ja
Publication of JPS643568B2 publication Critical patent/JPS643568B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)
JP8445180A 1980-06-21 1980-06-21 Manufacture of square shaped metallic tube through convex roll Granted JPS579526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8445180A JPS579526A (en) 1980-06-21 1980-06-21 Manufacture of square shaped metallic tube through convex roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8445180A JPS579526A (en) 1980-06-21 1980-06-21 Manufacture of square shaped metallic tube through convex roll

Publications (2)

Publication Number Publication Date
JPS579526A JPS579526A (en) 1982-01-19
JPS643568B2 true JPS643568B2 (en]) 1989-01-23

Family

ID=13830974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8445180A Granted JPS579526A (en) 1980-06-21 1980-06-21 Manufacture of square shaped metallic tube through convex roll

Country Status (1)

Country Link
JP (1) JPS579526A (en])

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224084A (ja) * 1982-06-21 1983-12-26 Teruyoshi Imamura 角形電縫鋼管の製造方法
KR100332736B1 (ko) * 1999-09-16 2002-04-17 김민 각형 파이프의 성형장치

Also Published As

Publication number Publication date
JPS579526A (en) 1982-01-19

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