Vibration Suppression of a Cantilever Plate During Milling Using Passive Dynamic Absorber

Abstract

During milling process, the vibration is an unavoidable phenomenon which causes damage in the tool and spindle bearings and leads to poor dimensional accuracy and surface finish of the workpiece. With the ultimate goal of vibration suppression of a thin-walled workpiece during milling process, this paper provides a comparative study of the dynamic behavior simulation of a cantilever rectangular thin plate submitted to a milling operation with and without passive dynamic mass-spring absorbers attached to it. The simulation is carried out taking into account the Kirchhoff model for the plate and the Moradi et al. (2015) model for the cutting force of milling. To solve the equation of motion of the plate with the finite element method the MATLAB software is used. The plate natural frequencies and mode shapes are first identified and then two cases of the plate deflection are determined by the cutting force and taking or neglecting additive absorbers. The obtained results show that the attachment of vibration absorbers to the plate workpiece enlarges its range of natural frequencies. Thus, it can minimize undesired vibration and improves the milling conditions and the surface quality. The proposed vibration absorber design includes other advantages such as design simplicity, intuitive clarity, and hardware and development effective cost. However, the plate deflection remains relatively high because this type of vibration absorber is efficient just in case of one resonance frequency.