Process damping of self-excited third octave mill vibration

Abstract

Control of self-excited third octave vibration in a metal rolling mill can be achieved by adjusting the tension of the metal strip as it enters a stand 102. Self-excited third octave vibration can be detected and / or measured by one or more sensors. A high-speed tension adjustor 144 can rapidly adjust the entry tension of the metal strip (e.g., as the metal strip enters a mill stand) to compensate for the detected self-excited third octave vibration. High-speed tension adjustors can include any combination of hydraulic or piezoelectric actuators coupled to the center roll of a bridle roll to rapidly raise or lower the roll and thus induce rapid tension adjustments in the strip. Other high-speed tension adjustors can be used.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 024,517, filed July 15, 2014, entitled "PROCESS DAMPING OF SELF EXCITEDTHIRD OCTAVE MILL VIBRATION" , which application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to metalworking and more particularly to controlling vibration in high speed rolling mills. Background technique [0004] Metal rolling, such as high-speed rolling, is a metalworking process used to produce metal strip. The resulting metal strip can be crimped, cut, machined, pressed, or otherwise formed into additional products, such as beverage cans, automotive parts, or many other metal products. Metal rolling involves passing metal, such as metal strip, through one or more rolling stands, each having one or more work rolls, which compress the metal strip to reduce the thickness of the metal strip. ...

AI Technical Summary

Problems solved by technology

Such a method may still result in minor amounts of wear to the mill stand and damage to the rolled metal strip, and may significantly slow down the processing of the rolled metal strip, thereby reducing the possible output of the rolling mill

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