EP 2919926 A1 20150923 - METHOD AND DEVICE FOR PRODUCING SEAMLESS STEEL PIPES HAVING LOW ECCENTRICITY
Title (en)
METHOD AND DEVICE FOR PRODUCING SEAMLESS STEEL PIPES HAVING LOW ECCENTRICITY
Title (de)
VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG NAHTLOSER STAHLROHRE MIT GERINGER EXZENTRIZITÄT
Title (fr)
PROCÉDÉ ET DISPOSITIF DE FABRICATION DE TUBES D'ACIER SANS SOUDURE A FAIBLE EXCENTRICITE
Publication
Application
Priority
- DE 102012022014 A 20121103
- DE 2013100371 W 20131026
Abstract (en)
[origin: WO2014067514A1] The invention relates to a method for producing seamless steel pipes in a rolling train having one or more longitudinal or transverse roll stands arranged one behind the other and an internal tool that is used as a piercing mandrel or rolling bar during the rolling process. The invention provides a method by means of which the eccentricity of the rolled stock can be considerably reduced. For that purpose a movement spaced from the longitudinal axis of the rolled stock is imposed by means of a device on the longitudinal axis of the internal tool.
IPC 8 full level
B21B 19/04 (2006.01)
CPC (source: EP RU US)
B21B 17/00 (2013.01 - RU); B21B 17/02 (2013.01 - US); B21B 19/04 (2013.01 - EP US); B21B 25/00 (2013.01 - RU); B21B 25/02 (2013.01 - US); B21B 25/00 (2013.01 - EP US)
Citation (search report)
See references of WO 2014067514A1
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102012022014 B3 20131212; CN 104968447 A 20151007; CN 104968447 B 20190312; EP 2919926 A1 20150923; RU 2015120959 A 20161220; RU 2652667 C2 20180428; US 2015298185 A1 20151022; US 9616475 B2 20170411; WO 2014067514 A1 20140508
DOCDB simple family (application)
DE 102012022014 A 20121103; CN 201380069371 A 20131026; DE 2013100371 W 20131026; EP 13818650 A 20131026; RU 2015120959 A 20131026; US 201314439816 A 20131026