EP 0529943 A2 19930303 - Mandrel mill for seamless steel tubes.
Title (en)
Mandrel mill for seamless steel tubes.
Title (de)
Kontinuierliches Rohrwalzwerk für nahtlose Stahlrohre.
Title (fr)
Laminoir continu pour tubes en acier sans soudure.
Publication
Application
Priority
JP 23383591 A 19910822
Abstract (en)
A mandrel mill for rolling seamless steel tubes includes a plurality of roll stands each having a pair of rolls defining a roll groove therebetween, an axis of the rolls of each roll stand being orthogonal to the axis of the rolls of the adjacent roll stands. The mandrel mill further includes a mandrel bar disposed in the roll grooves configured by the roll stands. The ratio between the radius of curvature of a groove bottom of the groove and a distance between the groove bottom of the roll groove of the first stand ranges from 0.46 to 0.54, and that of the second stand ranges from 0.48 to 0.52. <IMAGE>
IPC 1-7
IPC 8 full level
B21B 17/02 (2006.01); B21B 17/04 (2006.01); B21B 27/02 (2006.01); B21B 37/18 (2006.01); B21B 37/78 (2006.01)
CPC (source: EP)
B21B 17/04 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0529943 A2 19930303; EP 0529943 A3 19930630; CA 2076402 A1 19930223; CA 2076402 C 19960305; JP H0550115 A 19930302; JP H07102369 B2 19951108
DOCDB simple family (application)
EP 92307612 A 19920820; CA 2076402 A 19920819; JP 23383591 A 19910822