EP 2358485 B1 20120926 - METHOD FOR PRODUCING SEAMLESS TUBES BY MEANS OF A THREE-ROLL BAR ROLLING MILL
Title (en)
METHOD FOR PRODUCING SEAMLESS TUBES BY MEANS OF A THREE-ROLL BAR ROLLING MILL
Title (de)
VERFAHREN ZUR HERSTELLUNG NAHTLOSER ROHRE MITTELS EINES DREI-WALZEN-STANGENWALZWERKS
Title (fr)
PROCÉDÉ DE FABRICATION DE TUBES SANS SOUDURE AU MOYEN D'UN LAMINOIR À BARRES À TROIS CYLINDRES
Publication
Application
Priority
- DE 2009001685 W 20091120
- DE 102008061141 A 20081209
Abstract (en)
[origin: CA2745586A1] The invention relates to a method for producing seamless tubes from metal, particularly from steel, wherein a previously produced hot hollow block is stretched by means of a three-roll bar rolling mill on a mandrel to form a parent tube and, before running into the bar rolling mill, the hollow block is provided with a rolling step that makes the diameter more uniform by means of an upstream stand. It is in this case provided that the rolls of the upstream stand are moved apart and together to the same extent as the deforming stands of the bar rolling mill, wherein the calibrating base radius of the rolls of the upstream stand extends over 60° and this is followed by a flank radius with a tangential transition which is dimensioned such that even with the maximum adjustment of the rolls in the region of the flank there is virtually no diameter reduction of the largest hollow block diameter to be expected.
IPC 8 full level
B21B 27/02 (2006.01); B21B 23/00 (2006.01)
CPC (source: EP US)
B21B 23/00 (2013.01 - EP US); B21B 27/024 (2013.01 - EP US); B21B 17/04 (2013.01 - EP US); B21B 17/14 (2013.01 - EP US)
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)
DE 102008061141 A1 20100610; DE 102008061141 B4 20120830; AR 073952 A1 20101215; AU 2009326655 A1 20100617; BR PI0922639 A2 20171024; BR PI0922639 A8 20171212; BR PI0922639 A8 20180102; BR PI0922639 B1 20200929; CA 2745586 A1 20100617; CN 102245321 A 20111116; CN 102245321 B 20140910; EA 018319 B1 20130730; EA 201100924 A1 20111230; EP 2358485 A2 20110824; EP 2358485 B1 20120926; ES 2396424 T3 20130221; HR P20120985 T1 20130331; JP 2012510902 A 20120517; JP 5679981 B2 20150304; KR 101607585 B1 20160330; KR 20110102443 A 20110916; MX 2011006054 A 20110906; PL 2358485 T3 20130531; TN 2011000273 A1 20121217; UA 100933 C2 20130211; US 2012125068 A1 20120524; US 9056341 B2 20150616; WO 2010066230 A2 20100617; WO 2010066230 A3 20100916; ZA 201104275 B 20120229
DOCDB simple family (application)
DE 102008061141 A 20081209; AR P090104036 A 20091021; AU 2009326655 A 20091120; BR PI0922639 A 20091120; CA 2745586 A 20091120; CN 200980149662 A 20091120; DE 2009001685 W 20091120; EA 201100924 A 20091120; EP 09805676 A 20091120; ES 09805676 T 20091120; HR P20120985 T 20121203; JP 2011539891 A 20091120; KR 20117015851 A 20091120; MX 2011006054 A 20091120; PL 09805676 T 20091120; TN 2011000273 A 20110526; UA A201108582 A 20091120; US 200913133518 A 20091120; ZA 201104275 A 20110608