EP 0638375 B1 19961113 - Method and device for monitoring chattering in twin drives of tolling stands
Title (en)
Method and device for monitoring chattering in twin drives of tolling stands
Title (de)
Verfahren und Vorrichtung zur Ratterüberwachung bei Zwillingsantrieben von Walzgerüsten
Title (fr)
Procédé et dispositif pour la surveillance de l'apparition du broutage dans des commandes symétriques doubles de cages de laminoir
Publication
Application
Priority
- EP 94105906 A 19940415
- EP 93111230 A 19930713
Abstract (en)
[origin: EP0638375A1] In a chatter monitoring system for twin drives of rolling stands, vibrations of the upper drive (2, 4, 6, 8) and of the lower drive (3, 5, 7, 9) are detected and monitored to determine whether they exceed a predetermined amplitude. If they do exceed the said amplitude, a chatter detection signal is generated. In order to prevent incorrect generation of the chatter detection signal as a consequence of stock entry vibrations, the frequencies of the vibrations of the upper drive (2, 4, 6, 8) and of the lower drive (3, 5, 7, 9) are monitored for equality; if their frequency is equal, the chatter detection signal is suppressed. <IMAGE>
IPC 1-7
IPC 8 full level
B21B 37/00 (2006.01); B21B 38/00 (2006.01)
CPC (source: EP US)
B21B 37/007 (2013.01 - EP US); B21B 38/008 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE FR GB
DOCDB simple family (publication)
EP 0638375 A1 19950215; EP 0638375 B1 19961113; US 5515731 A 19960514
DOCDB simple family (application)
EP 94105906 A 19940415; US 27249194 A 19940708