Investigation on machinability and damping effect of internal turning operation using magnetorheological fluid damper

Abstract

Machining of parts is a major manufacturing process in the metal cutting industry In metal cutting operations such as turning milling boring internal turning and grinding take place degrading vibrations are a common problem In the internal turning operations vibration is a pronounced problem as long and slender boring bars are usually required to perform the internal machining of workpieces Tool vibration in internal turning frequently has a degrading influence on surface quality tool life and newlineproduction efficiency whilst also resulting in severe environmental issues such as high noise levels A lathe machine was equipped with all necessary arrangements to carry out the internal turning operations to measure the required output parameters Two types of dampers hydraulic cylinder type MR fluid damper and a compact type semi active MR fluid damper were designed developed and tested under different operating conditions to suppress the machine tool chatter during internal turning operation The experiments were performed with and without MR fluid damper under selected machining conditions on the conventional lathe with cost effective techniques especially for existing machine tools The standard parameters and their levels are selected based on the previous study and the machine manufacturers recommendations newline newline