MY124926A - Manufacturing method for angled steel pipes and manufacturing method for round steel pipes - Google Patents

Manufacturing method for angled steel pipes and manufacturing method for round steel pipes

Info

Publication number
MY124926A
MY124926A MYPI20015370A MYPI20015370A MY124926A MY 124926 A MY124926 A MY 124926A MY PI20015370 A MYPI20015370 A MY PI20015370A MY PI20015370 A MYPI20015370 A MY PI20015370A MY 124926 A MY124926 A MY 124926A
Authority
MY
Malaysia
Prior art keywords
steel pipes
portions
manufacturing
allow
angled steel
Prior art date
Application number
MYPI20015370A
Inventor
Nakajima Hiromu
Nakajima Norio
Original Assignee
Nakajima Steel Pipe 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
Priority claimed from JP7192343A external-priority patent/JPH0938721A/en
Priority claimed from JP7288233A external-priority patent/JPH0999324A/en
Priority claimed from JP7288232A external-priority patent/JPH09103821A/en
Priority claimed from JP01478396A external-priority patent/JP3231239B2/en
Application filed by Nakajima Steel Pipe Co Ltd filed Critical Nakajima Steel Pipe Co Ltd
Publication of MY124926A publication Critical patent/MY124926A/en

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat Treatment Of Steel (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

ANGLED STEEL PIPES MANUFACTURED BY COLD FORMING ALLOW ANGLE PORTIONS AND SEAM-WELDED PORTIONS THEREOF TO HAVE HARDNESS VALUES PRETTY HIGHER THAN THOSE OF FLAT PLATE PORTIONS AND NO YIELD POINTS, ALLOW TENSILE STRESS AND COMPRESSIVE STRESS TO REMAIN IN THE ANGLE PORTIONS AND SEAM-WELDED PORTIONS, THEREBY LOWERING BUCKLING STRENGHT AND ALLOW THE ANGLE PORTIONS TO BE REMARKABLY EMBRITTLED DUE TO TOUGHNESS DEFORMATION LOCALLY REMAINING IN ANGLE PORTIONS AFTER BENDING. THE METHOD ACCORDING TO THE PRESENT INVENTION MAKES IT POSSIBLE TO MANUFACTURE ANGLED STEEL PIPES WHICH ARE SOFT AND HIGHLY STRETCHABLE OVER THE ENTIRE SECTIONS THEREOF, ALMOST FREE FROM RESIDUAL STRESSES, AND HAVE HIGH BUCKLING STRENGTH, EXCELLENT SECONDARY WELDABILITY AND SUFFECIENT TOUGHNESS BY HOT FORMING WITH AN ANGLED STEEL PIPE FORMING MILL.@@(FIG. 1)
MYPI20015370A 1995-07-28 1996-07-27 Manufacturing method for angled steel pipes and manufacturing method for round steel pipes MY124926A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP7192343A JPH0938721A (en) 1995-07-28 1995-07-28 Production of square steel tube
JP19783895 1995-08-03
JP20263795 1995-08-09
JP7288233A JPH0999324A (en) 1995-08-03 1995-11-07 Manufacture of square tube
JP7288232A JPH09103821A (en) 1995-08-09 1995-11-07 Manufacture of square steel tube
JP01478396A JP3231239B2 (en) 1996-01-31 1996-01-31 Steel pipe manufacturing method

Publications (1)

Publication Number Publication Date
MY124926A true MY124926A (en) 2006-07-31

Family

ID=27548533

Family Applications (2)

Application Number Title Priority Date Filing Date
MYPI0105380 MY126145A (en) 1995-07-28 1996-07-27 Manufacturing method for angled steel pipes and manufacturing method for round steel pipes
MYPI20015370A MY124926A (en) 1995-07-28 1996-07-27 Manufacturing method for angled steel pipes and manufacturing method for round steel pipes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
MYPI0105380 MY126145A (en) 1995-07-28 1996-07-27 Manufacturing method for angled steel pipes and manufacturing method for round steel pipes

Country Status (2)

Country Link
CN (3) CN1066075C (en)
MY (2) MY126145A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102861766B (en) * 2012-09-20 2015-04-01 衡阳华菱钢管有限公司 Square tube rolling device, square tube sizing mill with same and production method of square tube
CN103629965A (en) * 2013-11-29 2014-03-12 锦州秀亭制管有限公司 Cooling pipe with square pits
CN104128373A (en) * 2014-08-12 2014-11-05 无锡市瑞尔精密机械股份有限公司 Novel machine set for producing hot rolling seamless square steel pipe
CN104353699B (en) * 2014-10-11 2016-09-21 浙江久德不锈钢型材有限公司 Steel pipe mould
CN104307924A (en) * 2014-11-14 2015-01-28 武汉钢铁(集团)公司 Square rectangular tube cold roll forming method
CN111836688B (en) * 2018-03-16 2022-09-13 杰富意钢铁株式会社 Method for manufacturing square steel pipe and square steel pipe
CN108453153B (en) * 2018-05-03 2024-06-28 石家庄富瑞沃机电设备有限公司 Roller device for directly forming square tube
CN110722015B (en) * 2018-07-17 2025-02-11 广州欣诺精密钢管产业研究院有限公司 A square and rectangular tube forming system with hot and cold composite forming and thickened corners
KR102727370B1 (en) * 2019-04-08 2024-11-07 제이에프이 스틸 가부시키가이샤 Square steel pipe and its manufacturing method and building structures
KR102705240B1 (en) * 2019-08-30 2024-09-09 제이에프이 스틸 가부시키가이샤 Square steel pipe and its manufacturing method and building structures
CN111229859B (en) * 2020-01-14 2021-12-03 长沙市大川防火材料有限公司 Automatic production process of air duct
WO2021187115A1 (en) * 2020-03-16 2021-09-23 Ｊｆｅスチール株式会社 Square steel pipe for beam-column joint, beam-column joint structure using same, and method for manufacturing square steel pipe
CN111687213A (en) * 2020-06-23 2020-09-22 刘伟良 Hot rolling device is used in production of nonrust steel pipe
CN112275833B (en) * 2020-11-03 2024-11-22 厦门正黎明冶金机械有限公司 A sharp-angle square tube forming system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69935236T2 (en) * 1998-08-12 2007-11-08 Rofin Australia Pty. Ltd., Dingley LIQUID LIGHT GUIDE

Also Published As

Publication number Publication date
CN1186141C (en) 2005-01-26
CN1291532A (en) 2001-04-18
CN1291533A (en) 2001-04-18
MY126145A (en) 2006-09-29
CN1154880A (en) 1997-07-23
HK1036028A1 (en) 2001-12-21
CN1066075C (en) 2001-05-23
CN1177656C (en) 2004-12-01
HK1036027A1 (en) 2001-12-21

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