8results about "Vibration control device" patented technology

A method for determining the conformity of a rolling roll and the like is disclosed. The method includes: a rolling load data acquisition step of acquiring rolling load operation data of a stand having a roll to be evaluated; a circumferential speed data acquisition step of acquiring circumferential speed operation data of the roll to be evaluated; a vibration analysis step of analyzing the vibration behavior of the stand using the rolling load operation data of the stand; a surface shape estimation step of estimating the surface shape of the roll to be evaluated from the analysis result of the vibration behavior of the stand and the circumferential speed operation data of the roll to be evaluated during the rolling of a metal strip; and a conformity determination step of determining the conformity of the roll to be evaluated based on the surface shape of the roll to be evaluated.

There are provided a method for determining the conformity of a rolling roll and the like capable of estimating the state of polygonal wear of a roll to be evaluated occurring during rolling in on-line and preventing slight chatter marks. The method for determining the conformity of a rolling roll includes: a rolling load data acquisition step (Step S3) of acquiring rolling load operation data of a stand (F1 to F5) having a roll to be evaluated; a circumferential speed data acquisition step of acquiring circumferential speed operation data of the roll to be evaluated (Step S4); a vibration analysis step of analyzing the vibration behavior of the stand (F1 to F5) using the rolling load operation data of the stand (F1 to F5) (Step S5); a surface shape estimation step of estimating the surface shape of the roll to be evaluated from the analysis result of the vibration behavior of the stand (F1 to F5) and the circumferential speed operation data of the roll to be evaluated during the rolling of a metal strip (Step S6); and a conformity determination step of determining the conformity of the roll to be evaluated based on the surface shape of the roll to be evaluated (Step S7).

The invention relates to a method for operating a system, for example, a rolling mill for processing a product in a work process. In a first process step a), the method provides that vibrations on a system are detected in the form of a first temporal vibration signal in order to subsequently transform this signal in a step b) into an amplitude spectrum in the frequency domain. Within the frequency domain, risk areas are predefined to check whether individual peaks of the amplitude spectrum extend at least partially into the risk areas (step c)). If this is the case, the magnitude of the risk to the operation of the system is assessed according to process step d), in particular with regard to the extent that it originates from a component of the system that is represented by the peak extending into the risk area. At least one countermeasure is proposed and implemented to modify or maintain this risk (steps e) and f).

This invention relates to a system suitable for suppressing the vibration of AGC hydraulic cylinders in cold rolling mills, comprising a hydraulic suppression servo valve and a hydraulic suppression controller. The hydraulic suppression controller controls the hydraulic suppression servo valve to output pressure and flow opposite to the vibration direction of the AGC hydraulic cylinder based on the position information of the AGC hydraulic cylinder, thereby suppressing the vibration of the AGC hydraulic cylinder. This invention employs a hydraulic suppression system that reduces mill system vibration while maintaining a constant rolling speed and increasing the push-up and push-down strokes of the hydraulic cylinder. Furthermore, the hydraulic suppression system is separated from the mill's own AGC system, minimizing its impact. When the mill's hydraulic system vibrates, the position signal is fed back to the hydraulic suppression system, transforming the position signal into a suppression signal with equal frequency but opposite phase. This causes the hydraulic suppression servo valve to generate pressure and flow opposite to the vibration, reducing the system vibration amplitude and thus suppressing the vibration of the hydraulic system.

A cold rolling mill rolling condition calculation method according to the present invention includes: an estimation step of estimating a rolling constraint condition with respect to a target steady rolling condition of a roll target material, the estimation performed by training a prediction model using first multi-dimensional data generated based on non-steady rolling performance data, among past rolling performance in rolling a roll material by a cold rolling mill, as an explanatory variable, and using steady rolling performance data and rolling constraint condition data during steady rolling, as a response variable, and then inputting second multi-dimensional data generated based on the non-steady rolling performance data of the roll target material; and a change step of changing the target steady rolling condition so that the estimated rolling constraint condition satisfies a predetermined condition.

The present application relates to a chatter detection method for a cold rolling mill, including the steps of: inputting second multi-dimensional data generated based on condition data corresponding to array data related to a rolling object material, into a prediction model learned by taking as explanatory variables first multi-dimensional data generated based on one-dimensional array data representing past rolling performance of a rolling material rolled by the cold rolling mill, and taking as target variables past occurrence performance of chatter corresponding to the rolling performance, thereby predicting occurrence of chatter at the time of rolling the rolling object material.

The present application relates to a rolling condition calculation method for a cold rolling mill, including: a step of estimating, to a prediction model learned by taking first multidimensional data generated based on non-stable rolling performance data in past rolling performance in which a rolling material is rolled by the cold rolling mill as explanatory variables and taking stable rolling performance data and rolling constraint condition data at the time of stable rolling as target variables, second multidimensional data generated based on non-stable rolling performance data of a rolling target material, a rolling constraint condition for a target stable rolling condition with respect to the rolling target material; and a step of changing the target stable rolling condition in such a manner that the estimated rolling constraint condition satisfies a prescribed condition.

The invention relates to a method for operating a system, for example a roll stand for processing a product in a working process. In a first method step a), the method provides that vibrations at a system are detected in the form of a first temporal vibration signal, in order to subsequently transform same into an amplitude spectrum in the frequency domain in step b). Within the frequency domain, risk regions are predefined in order to check whether individual peaks of the amplitude spectrum extend at least partially into the risk regions (step c)). If they do, the magnitude of the risk for operation of the system is evaluated according to method step d), in particular insofar as the risk is based on a component of the system which is represented by the peak extending into the risk region. At least one countermeasure is proposed and implemented to change or maintain this risk, steps e) and f).