EP 0329132 A3 19910102 - FINISHING-ROLLING METHOD FOR SECTIONS
Title (en)
FINISHING-ROLLING METHOD FOR SECTIONS
Publication
Application
Priority
DE 3805364 A 19880217
Abstract (en)
[origin: EP0329132A2] For the central rolling out of the webs or to avoid deep pass incisions of the rolls/former rolls and to avoid undercuts due to the outer portions of the section/flanges in the production of H, I, U, T, L, double T sections and similar rolled material, the trick of folding out is employed. After the upset passes the flanges are formed by folding, i.e. by a flat and edging pass, during finishing-rolling. <??>The invention proposes a new folding method in accordance with the principle of the three-roll bending method. Another solution to the same problem comprises a folding method which employs back-up rolls for the first portion of the section or web, the said rolls not touching the inner flange faces or inner faces of second portions of the section. <??>Corresponding new roll stands and rolling mills require lower levels of investment, exhibit less roll wear and have a shorter overall length. Further advantages are the smaller requirement for former rolls and lower energy consumption. <IMAGE>
IPC 1-7
IPC 8 full level
B21B 1/088 (2006.01); B21B 1/08 (2006.01); B21B 1/092 (2006.01); B21B 1/095 (2006.01); B21B 13/10 (2006.01)
CPC (source: EP US)
B21B 1/088 (2013.01 - EP US)
Citation (search report)
- [X] FR 369516 A 19070114 - WILHELM SCHROER [DE]
- [X] JP S60240303 A 19851129 - HITACHI LTD
- [A] FR 9627 E 19081218 - SACK HUGO
- [A] DE 219152 C 19100216
- [AD] DE 240433 C
- [AD] DE 307856 C 19180913 - PEINER WALZWERK AG [DE]
- [A] JP S55126301 A 19800930 - SUMITOMO METAL IND
- [A] DE 721478 C 19420606 - ILSEDER HUETTE
- [A] SU 599863 A1 19780419 - NESMACHNYJ ALEKSANDR N [SU], et al
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0329132 A2 19890823; EP 0329132 A3 19910102; EP 0329132 B1 19930915; AT E94433 T1 19931015; DE 3805364 A1 19890831; DE 58905573 D1 19931021; ES 2043907 T3 19940101; JP H01309702 A 19891214; US 4942753 A 19900724
DOCDB simple family (application)
EP 89102664 A 19890216; AT 89102664 T 19890216; DE 3805364 A 19880217; DE 58905573 T 19890216; ES 89102664 T 19890216; JP 3519689 A 19890216; US 31160889 A 19890215