EP 1731234 A4 20071024 - TUBE MANUFACTURING METHOD AND APPARATUS FOR FIXED DIAMETER ROLLING
Title (en)
TUBE MANUFACTURING METHOD AND APPARATUS FOR FIXED DIAMETER ROLLING
Title (de)
ROHRHERSTELLUNGSVERFAHREN UND VERFAHREN ZUM FESTDURCHMESSERWALZEN
Title (fr)
PROCÉDÉ DE FABRICATION DE TUBES ET DISPOSITIF POUR LAMINAGE À DIAMÈTRE FIXE
Publication
Application
Priority
- JP 2005005198 W 20050323
- JP 2004096821 A 20040329
Abstract (en)
[origin: EP1731234A1] The present invention provides a method of manufacturing a pipe or tube, comprising the step of rolling the pipe or tube by using a sizing mill comprising a plurality of stands each of which has a plurality of grooved rolls, wherein the grooved rolls are so configured that when tangents are drawn at edge parts facing to each other of adjacent grooved rolls at each stand, assuming that a minimum value of angles defined by the tangents in all stands is ² (deg), an outer diameter of the pipe or tube at an output side of the sizing mill is D (mm), and a thickness of the pipe or tube at the output side of the sizing mill is t (mm), the angle ² satisfies a following formula (1): ² ‰¥ 1.13 × 10 × Ln t / D × 100 + 1.37 × 10 2
IPC 8 full level
B21B 17/14 (2006.01); B21B 27/02 (2006.01)
CPC (source: EP)
B21B 17/14 (2013.01); B21B 27/024 (2013.01)
Citation (search report)
- [A] JP H10156412 A 19980616 - SUMITOMO METAL IND
- [A] JP S61216805 A 19860926 - NIPPON KOKAN KK
- [A] JP S5728604 A 19820216 - SUMITOMO METAL IND
- See references of WO 2005092531A1
Designated contracting state (EPC)
DE FR IT
DOCDB simple family (publication)
EP 1731234 A1 20061213; EP 1731234 A4 20071024; EP 1731234 B1 20110803; CN 100409953 C 20080813; CN 1905958 A 20070131; JP 4650747 B2 20110316; JP WO2005092531 A1 20080207; WO 2005092531 A1 20051006
DOCDB simple family (application)
EP 05721298 A 20050323; CN 200580001515 A 20050323; JP 2005005198 W 20050323; JP 2006511469 A 20050323