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1. (MXMX/a/2010/013754) METHOD AND APPARATUS TO SUPPRESS VIBRATIONS IN A ROLLING MILL

Amt : Mexiko
Anmeldenummer: MX/a/2010/013754 Anmeldedatum: 13.12.2010
Veröffentlichungsnummer: MX/a/2010/013754 Veröffentlichungsdatum: 16.02.2011
Veröffentlichungsart : A
Frühere PCT-Anm.: Anmeldenummer:EP2009055526 ; Veröffentlichungsnummer:2009153101 Anklicken zur Anzeige der Daten
IPC:
B21B 37/00
B Arbeitsverfahren; Transportieren
21
Mechanische Metallbearbeitung ohne wesentliches Zerspanen des Werkstoffs; Stanzen von Metall
B
Walzen von Metall
37
Steuer-/Regeleinrichtungen oder -/verfahren, speziell ausgebildet für Metallwalzwerke oder für das damit hergestellte Walzgut
Anmelder: SIEMENS VAI METALS TECHNOLOGIES GMBH&CO
Erfinder: GERALD HOHENBICHLER
GEORG KEINTZEL
Vertreter: MARIA ANGELICA PARDAVELL JUAREZ
Prioritätsdaten: A979/2008 18.06.2008 AT
Titel: (EN) METHOD AND APPARATUS TO SUPPRESS VIBRATIONS IN A ROLLING MILL
(ES) METODO Y APARATO PARA LA ELIMINACION DE LAS OSCILACIONES EN UNA INSTALACION CIRCULANTE
Zusammenfassung:
(EN) The present invention relates to a method and to an apparatus for suppression of vibrations in a rolling mill. The problem of the invention is to create a method and an apparatus having a hydraulic roller actuator for the suppression of vibrations in a rolling mill, with which in particular the third-octave vibrations can be effectively suppressed and thereby the quality of the rolled material and/or the productivity of the rolling mill can be improved. This problem is solved by a method in which the control variable is supplied to an electro-hydraulic actuating unit and then due to this actuating unit at least one hydraulic actuator for the roller setting is actuated, wherein the electro-hydraulic actuating unit has a nominal rate of flowâë¥50 l/min and at least a portion of the frequency response at frequencies fâë¥80 Hz is characterized by a drop in value ofâë¤3 dB, and in this frequency range, the phase dropÏòsatisfies the conditions (I) andÏò<90°. The present invention relates to a method and to an apparatus for suppression of vibrations in a rolling mill. The problem of the invention is to create a method and an apparatus having a hydraulic roller actuator for the suppression of vibrations in a rolling mill, with which in particular the third-octave vibrations can be effectively suppressed and thereby the quality of the rolled material and/or the productivity of the rolling mill can be improved. This problem is solved by a method in which the control variable is supplied to an electro-hydraulic actuating unit and then due to this actuating unit at least one hydraulic actuator for the roller setting is actuated, wherein the electro-hydraulic actuating unit has a nominal rate of flowâë¥50 l/min and at least a portion of the frequency response at frequencies fâë¥80 Hz is characterized by a drop in value ofâë¤3 dB, and in this frequency range, the phase dropÏòsatisfies the conditions (I) andÏò<90°. A polyarylene ether ketone having an improved inherent color is obtained if one performs the reaction of an aromatic dihalogen compound with a bisphenol in a high-boiling solvent and in the presence of an auxiliary base in such a way that the dihalogen compound and solvent are heated together in the reaction vessel and at least 50 mol%of the bisphenol are metered into the reaction vessel once the internal temperature is at least 180°C.
(ES) La presente invención se relaciona con un método y un aparato para la eliminación de oscilaciones en una instalación circulante. El objetivo de la invención es proporcionar un método y un aparato que tiene el acoplamiento de rodillo hidráulico para la eliminación de las oscilaciones en una instalación circulante por medio la cual, en particular, se suprimen de manera efectiva las oscilaciones de la 3ra-octava lo que hace posible mejorar la calidad del material circulante y/o la productividad de la instalación circulante. Este objetivo se logra a través un método en el que la variable manipulada se proporciona a un elemento de activación electrohidráulico y este elemento de activación actúa en al menos un activador hidráulico para el acoplamiento de rodillo, en donde el elemento de activación electrohidráulico tiene una proporción de flujo clasificada de=50 1/min y al menos una porción de respuesta de frecuencia en las frecuencias f=80 Hz se caracteriza por una disminución de magnitud de=3 dB y la fase de retrasoØen este nivel de frecuencia satisface las condiciones (ver fórmula) yØ90º.
Also published as:
EP2285506US20110120202RU2011101570CN102083560MX2010013754BRPI0915724
IN8000/CHENP/2010WO/2009/153101