Vibration Monitoring and Analysis of Thin-Walled Casing Milling

Thin-walled elements are widely used in aerospace engines, such as blisk,casing, blade etc. There are significant vibrations while machining because of thesmall thickness and the poor rigidity of thin-walled workpieces which will lead to lowsurface machining quality, low machining efficiency and even worse the huge damageto the workpieces and the tools. Nevertheless, the vibration during milling does nothappen frequently, as it is closely related to the position of the workpiece structureand the machining parameters. The stiffness of the workpiece varies due to thechanging of cutting position. Therefore, vibration only appears in some positionswhen milling thin-walled workpieces. This paper mainly focus on monitoring themachining process in order to analyze the vibration and the position where it occurs.Moreover, with confirming the vibrated position and analyzing the reason of vibration,the paper provides a valid reference to the machining vibration controlling, the qualityand effectiveness of workpiece surface.