Development of MR fluid assisted novel vibration damping fixture for milling machine

Abstract

Chatter occurs in all metal cutting process and it is an important factor that causes uneven tool wear and reduced tool life resulting in poor surface finish of work piece. It even causes geometrical inconsistencies and poor surface finish. It can lead to higher costs, delayed deliveries and even loss of orders due to poor quality of the machined component. To reduce and control the tool vibration in metal cutting it is necessitating that to develop a clamping method to improve the vibration damping capability and improves the machining conditions. To cater this need design and development of Magnetorheological (MR) fluid assisted novel vibration damping fixture designed. The application of MR damper assisted fixture in milling machine is considered to be a solution for better vibration control and surface finish. From the experimental investigation it was evident that MR damper performance depends on parameters like suspended fluid, density, reaction time, particle size, maximum yield stress. The viscosity of the MR fluid depends on the intensity of magnetic field applied. Coil orientation, number of turns, current, gap between cylinder and piston are important parameters to be consider while designing a MR Damper. From the experimental results it was witnessed that the magnetorheological assisted fixture reduces the vibration during machining significantly and improves the surface roughness and machining performance.