EP 3793755 B1 20230726 - STRETCH-REDUCING MILL HAVING IMPROVED DIAMETER TOLERANCE AND WALL THICKNESS TOLERANCE
Title (en)
STRETCH-REDUCING MILL HAVING IMPROVED DIAMETER TOLERANCE AND WALL THICKNESS TOLERANCE
Title (de)
STRECKREDUZIERWALZWERK MIT VERBESSERTER DURCHMESSER- UND WANDDICKENTOLERANZ
Title (fr)
LAMINOIR DE RÉDUCTION D'ÉTIRAGE À TOLÉRANCE DE DIAMÈTRE ET D'ÉPAISSEUR DE PAROI AMÉLIORÉE
Publication
Application
Priority
- DE 102018207908 A 20180518
- EP 2019061761 W 20190508
Abstract (en)
[origin: WO2019219463A1] A stretch-reducing mill (1) for producing seamless pipes (R), which comprises a plurality of roll stands (10), which are arranged one after the other in a conveying direction (F) of the pipes (R) and each have three rolls (11) arranged at an angular distance of 120°, wherein the roll stands (10) are divided into at least two groups (A, B) each having at least two roll stands (10); the rolls (11) of adjacent roll stands (10) within a group (A, B) are staggered relative to each other by an intra-group angle αI; and the rolls (11) of the roll stands (10) of adjacent groups (A, B) are staggered relative to each other by a group angle αG that is less than the intra-group angle αI.
IPC 8 full level
B21B 17/14 (2006.01)
CPC (source: EP RU US)
B21B 17/14 (2013.01 - EP RU US); B21B 31/00 (2013.01 - RU); B21B 27/024 (2013.01 - EP); B21B 2267/18 (2013.01 - EP)
Citation (examination)
- JP 2013230500 A 20131114 - NIPPON STEEL & SUMITOMO METAL CORP
- CN 101773937 A 20100714 - TAIYUAN TONGZE HEAVY INDUSTRY
- CN 101823076 A 20100908 - TAIYUAN TONGZE HEAVY IND CO
- JP 2002066609 A 20020305 - KAWASAKI STEEL CO
- JP 2001129603 A 20010515 - KAWASAKI STEEL CO
- DE 19758107 A1 19990624 - MANNESMANN AG [DE]
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
DOCDB simple family (publication)
DE 102018207908 A1 20191121; AR 114907 A1 20201028; CN 112135696 A 20201225; EP 3793755 A1 20210324; EP 3793755 B1 20230726; RU 2751408 C1 20210713; US 2021078058 A1 20210318; WO 2019219463 A1 20191121
DOCDB simple family (application)
DE 102018207908 A 20180518; AR P190101324 A 20190517; CN 201980033062 A 20190508; EP 19723369 A 20190508; EP 2019061761 W 20190508; RU 2020137065 A 20190508; US 201917054641 A 20190508