EP 0081452 B1 19850515 - METHOD OF AND DEVICE FOR COLD-ROLLING TUBES, IN PARTICULAR TUBES OF GREAT LENGTH
Title (en)
METHOD OF AND DEVICE FOR COLD-ROLLING TUBES, IN PARTICULAR TUBES OF GREAT LENGTH
Publication
Application
Priority
DE 3146284 A 19811119
Abstract (en)
[origin: EP0081452A1] 1. Process for the cold rolling of pipes (2), particularly of large lengths, on a rolling mill with a reciprocating roll stand and positively driven grooved rolls (1) located therein, with intermittent advance and/or rotation of the pipe in the region of one or both dead centres (ET, AT), whereby the alternate rotation, possibly with total angle of rotation added from one or more individual angles of rotation, is equally great for each direction of rotation, characterized in that in a buffer zone deflecting the pipe (2) from the direction of rolling, the cyclically irregular speed of the rolled out pipe is converted into a constant run-out speed at which the pipe (2) is withdrawn, whereby the distance between the run out chuck (3) and the driving apparatus (4) is proportioned such that the torsional stress of the rolled pipe (2) always lies in the elastic range.
IPC 1-7
IPC 8 full level
B21B 21/00 (2006.01); B21C 47/02 (2006.01); B21B 15/00 (2006.01)
CPC (source: EP)
B21B 21/005 (2013.01); B21B 2015/0057 (2013.01)
Designated contracting state (EPC)
AT FR GB IT
DOCDB simple family (publication)
EP 0081452 A1 19830615; EP 0081452 B1 19850515; AT E13260 T1 19850615; DE 3146284 A1 19830526; DE 3146284 C2 19851031; JP S5890304 A 19830530; JP S6239041 B2 19870820
DOCDB simple family (application)
EP 82730130 A 19821013; AT 82730130 T 19821013; DE 3146284 A 19811119; JP 20351582 A 19821119