Prevention of self-starting rattling oscillation in rolling mills

In the rolling of steel plate and also from other roll goods it is in certain operating states to rattle. Characterized the rolling stock undergoes a reduction in quality, resulting in rejects and also in damage to the rolling mill. No improvement showed on the rollers fitted brakes also practiced electronic monitoring is not a satisfactory solution. After the idea that it is the chatter to a self-excited oscillation, Resistanzgeber be coupled to the rollers and / or the rolling stock to the self-excited Schwindungsmoden - to stabilize by an additional damping - modes with a negative damping. In the example of FIG. 4 41 also roll-shaped, co-rotating Resistanzgeber 44 can be coupled to the stripper. In the simplest case, the Resistanzgeber 44 consist of a damping plastics material. Effective and adaptable are concentric or disc-shaped layers of steel and plastic on the type of layered vibration absorber. The selected in FIG. 4 arrangement of stripper 41 and 44 can Resistanzgeber vertical (= x¶1¶ direction) eliminate vibrations, as well as the self-excited chatter in x¶2¶- and phi-direction, responsible for the ratterbedingten thickness and form waves in the rolling stock (42 = supporting roller 43 = rolling).