Dynamic Deflection of Periodic Cutting Tool Holder Based on Passive Model

Cutting force has a significant influence on the dimensional accuracy due to cutting toolholder deflection. The problem of tool holder deflection is faced frequently in a variety of engineering surface products, and to achieve this goal passive technique can be used. The need for passive technique arises from the complexities that brought to the structures by active control techniques and energy supplies required to implement such control systems. In this paper, an improved theoretical dynamic cutting force model for end milling is presented, using spectral finite element (FE) approach. The model depends on variable inputs such as, cutting tool shank diameter, number of periodic elements, choose the form of the cutting holder, if it is straight or periodic. The cutting parameters are given for getting an ideal cutting tool deflection distribution and frequency domain analysis. The simulation results indicate that the tool deflection has a significant influence on the dimensional accuracy of the finished part. The basic formulations of passive technique for deflection suppression of mechanical systems are briefly presented. It is based on the theory of dynamic deflection (proof mass -stiffness).