EP 0703014 B1 19971210 - Method for rolling hollow blocks in an Assel rolling mill
Title (en)
Method for rolling hollow blocks in an Assel rolling mill
Title (de)
Verfahren zum Walzen von Hohlblöcken auf einem Asselwalzwerk
Title (fr)
Procédé pour laminer des blocs creux dans un laminoir de type Assel
Publication
Application
Priority
DE 4431410 A 19940824
Abstract (en)
[origin: DE4431410C1] The method is for the reduction of the OD and the wall thickness by rolling a cylindrical hollow block, which with its front part is inserted in a roller mechanism. In the run-in direction, in front of the roller mechanism a device is provided for reduction of the dia. and/or the wall thickness of the rear end part of the hollow block positioned on a mandrel bar. The pre-reduction roller reduces the hollow block end and is adjustable against the hollow block and can be guided away from it.The pre-reduction roller is adjusted slowly and continuously against the hollow block and with such a positioning speed that the axial path (LNEL) for the effect of the pre-reduction roller measured from the contact point of the roller on the hollow block surface as far as the hollow block end amounts to:- LNEL = 0.8 .. 2.0 DH and LNEL = 1.0 ..1.25 DH whereby DH is the OD of the hollow block before entry into the roller mechanism.
IPC 1-7
IPC 8 full level
B21B 19/06 (2006.01); B21B 19/16 (2006.01); B21B 23/00 (2006.01); B21B 37/00 (2006.01); B21B 37/16 (2006.01); B21B 37/78 (2006.01)
CPC (source: EP KR US)
B21B 19/06 (2013.01 - EP KR US); B21B 19/16 (2013.01 - EP KR US); B21B 23/00 (2013.01 - EP US); B21B 37/78 (2013.01 - EP KR US)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
DE 4431410 C1 19951116; CN 1118286 A 19960313; CZ 217595 A3 19960313; DE 59501098 D1 19980122; EP 0703014 A1 19960327; EP 0703014 B1 19971210; JP H0866703 A 19960312; KR 960007036 A 19960322; US 5642638 A 19970701
DOCDB simple family (application)
DE 4431410 A 19940824; CN 95116618 A 19950823; CZ 217595 A 19950824; DE 59501098 T 19950623; EP 95250149 A 19950623; JP 23763895 A 19950823; KR 19950026395 A 19950824; US 51867095 A 19950824