EP 2422892 A4 20140716 - METHOD OF PRODUCING SEAMLESS PIPE AND APPARATUS FOR PERFORMING THE SAME
Title (en)
METHOD OF PRODUCING SEAMLESS PIPE AND APPARATUS FOR PERFORMING THE SAME
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES NAHTLOSEN ROHRS UND VORRICHTUNG ZUR DURCHFÜHRUNG DES VERFAHRENS
Title (fr)
PROCÉDÉ DE PRODUCTION DE TUYAU SANS SOUDURE ET APPAREIL POUR METTRE EN UVRE LEDIT PROCÉDÉ
Publication
Application
Priority
- JP 2010053824 W 20100309
- JP 2009102312 A 20090420
Abstract (en)
[origin: US2012017662A1] In the production of a seamless steel tube by piercing-rolling a heated billet with a piercing machine to form the billet into a hollow blank, and without reheating the hollow blank, by successively subjecting the hollow blank to elongation-rolling with an elongation-rolling mill and diameter-adjusting rolling by a diameter-adjusting rolling mill, it is made possible to prevent non-uniform longitudinal temperature distribution from occurring in a steel tube after diameter-adjusting rolling and enable energy saving to be accomplished by including a step 1 of measuring a temperature of the hollow blank along a longitudinal direction at the exit of the elongation-rolling mill; and a step 2 of spraying water onto the hollow blank to cool the hollow blank at the entrance of the diameter-adjusting rolling mill according to a measured longitudinal temperature distribution of the hollow blank, whereby the longitudinal temperature distribution of the hollow blank becomes uniform.
IPC 8 full level
B21B 23/00 (2006.01); B21B 45/02 (2006.01)
CPC (source: EP US)
B21B 23/00 (2013.01 - EP US); B21B 37/74 (2013.01 - EP US); B21B 37/76 (2013.01 - EP US); B21B 38/006 (2013.01 - EP US); B21B 45/0215 (2013.01 - EP US); B21B 2261/20 (2013.01 - EP US)
Citation (search report)
- [A] EP 2006396 A2 20081224 - SUMITOMO METAL IND [JP]
- [A] JP S5994515 A 19840531 - KAWASAKI STEEL CO
- See also references of WO 2010122847A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
US 2012017662 A1 20120126; BR PI1009482 A2 20160301; CN 102405114 A 20120404; EP 2422892 A1 20120229; EP 2422892 A4 20140716; JP 2010247218 A 20101104; JP 5262949 B2 20130814; WO 2010122847 A1 20101028
DOCDB simple family (application)
US 201113247120 A 20110928; BR PI1009482 A 20100309; CN 201080017410 A 20100309; EP 10766906 A 20100309; JP 2009102312 A 20090420; JP 2010053824 W 20100309