Stability prediction of micro-milling with tool runout and centrifugal force via using FEM and time-domain formulation

Abstract

Micro-milling is one of important methods for producing miniature components with high-accuracy. During the cutting process, the chatter vibration which can result in instability and poor surface finish may considerably be disturbed by the unpredictable tool runout and centrifugal force with ultra high speeds of micro-mill. This paper tries to develop a time domain dynamic model for depicting chatter vibration of micro-mill with the concerns of tool runout incorporated in cutting forces and centrifugal force included in external force work via combing FEM and time-domain formulation. Several simulations carried out illustrates the validity of the proposed model from the perspectives of FRF, SLD and time domain response.