ATE300366T1 - METHOD AND APPARATUS FOR ROLL FORMING STEEL TUBES - Google Patents

METHOD AND APPARATUS FOR ROLL FORMING STEEL TUBES

Info

Publication number
ATE300366T1
ATE300366T1 AT99917140T AT99917140T ATE300366T1 AT E300366 T1 ATE300366 T1 AT E300366T1 AT 99917140 T AT99917140 T AT 99917140T AT 99917140 T AT99917140 T AT 99917140T AT E300366 T1 ATE300366 T1 AT E300366T1
Authority
AT
Austria
Prior art keywords
forming
roll
zone
bend
target
Prior art date
Application number
AT99917140T
Other languages
German (de)
Inventor
Feizhou Wang
Atsumu Okamoto
Original Assignee
Nakata Mfg Company 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 JP09757599A external-priority patent/JP4906986B2/en
Priority claimed from JP11097577A external-priority patent/JP2000288634A/en
Application filed by Nakata Mfg Company Ltd filed Critical Nakata Mfg Company Ltd
Priority claimed from PCT/JP1999/002186 external-priority patent/WO2000059653A1/en
Application granted granted Critical
Publication of ATE300366T1 publication Critical patent/ATE300366T1/en

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

It is an object of the present invention to provide a novel roll-forming method for steel pipes and equipment for same with which (1) the evidence that forming work in the FF forming method is mainly carried out at the cluster forming portion showi ng the poor formability is modified and improved without any deteriorating the advantage of the common-utilization of rolls in the FF forming method which employs basically the circular-bend method, and (2) the forming function at the breakdown forming portion is enhanced. Accordingly, the pinch-point formed by the upper and lower rolls i s set at a boundary area between the target forming zone in the material's width direction and previously-formed zone or un-formed zone. The target forming zone is wound around a certain caliber of the upper roll on the bend-inner side, and bend-formed in such a way that the target forming zone is almost in non-contact with the lower roll. A s a result, the formability is remarkably improved and occurrences of roll flaws and roll marks or buckling can be prevented.
AT99917140T 1999-04-05 1999-04-23 METHOD AND APPARATUS FOR ROLL FORMING STEEL TUBES ATE300366T1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP09757599A JP4906986B2 (en) 1999-04-05 1999-04-05 Roll forming method
JP11097577A JP2000288634A (en) 1999-04-05 1999-04-05 Roll forming method and roll forming stand
PCT/JP1999/002186 WO2000059653A1 (en) 1999-04-05 1999-04-23 Method for roll forming steel pipes, and equipment for same

Publications (1)

Publication Number Publication Date
ATE300366T1 true ATE300366T1 (en) 2005-08-15

Family

ID=26438740

Family Applications (1)

Application Number Title Priority Date Filing Date
AT99917140T ATE300366T1 (en) 1999-04-05 1999-04-23 METHOD AND APPARATUS FOR ROLL FORMING STEEL TUBES

Country Status (4)

Country Link
EP (1) EP1169149B1 (en)
AT (1) ATE300366T1 (en)
CA (1) CA2270097C (en)
DE (1) DE69926406T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5470841B2 (en) 2008-12-26 2014-04-16 新日鐵住金株式会社 Roll bending apparatus for steel plate for cylinder pipe and roll bending method for steel plate for cylinder pipe using the same
EP4190460A4 (en) * 2020-07-31 2024-08-14 Nakata Mfg Co Ltd Method and device for producing metal pipe
DE102020215091A1 (en) 2020-12-01 2022-06-02 Sms Group Gmbh Process for preforming sheet metal and computer program and device for carrying out the process

Also Published As

Publication number Publication date
DE69926406D1 (en) 2005-09-01
CA2270097A1 (en) 2000-10-05
EP1169149B1 (en) 2005-07-27
DE69926406T2 (en) 2006-05-24
EP1169149A1 (en) 2002-01-09
CA2270097C (en) 2006-01-24

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