On Simplifying the Machine Tool Feed Drive Fem Models

ABSTRACT The paper presents research on modelling of HSM machine tool feed drive with use of Finite Element Method. The problems affecting generally considered machining accuracy were analysed, i.e. the problem of thermal displacements and the problem of displacements related to the feed drive stiffness. The research focused on possibility of simplifying (decreasing complexity) of the FEM models. Built, simplified models were compared to the base models in terms of accuracy of predicting temperature field and feed drive stiffness. Also, calculation time and size of hard disc files were considered.