Dynamic Simulation For Machining Process

The dynamic and static performance of CNC(Computer Numerical Control) is one of the most important factors that affect the machining efficiency. Deeply understanding the physics act in machining, correctly knowing the dynamic characteristics, proposing the principles and methods to improve the cutting performance, is a major mission in the area of research on machining.Firstly, the background and significance of this paper are elaborated. Optimizing the machining parameters based on the research of process dynamic is the convenient means to improve the efficiency of processing.In accordance with M.C.Shaw's idea that chip could be regard as a series of parallel orthogonal slices,a map is existed between the three-dimensional cutting process and planar orthogonal cutting process in chapter 2. In addition, several special finite element techniques have been implemented to improve the accuracy and efficiency of the finite element simulation. Afterwards, the above finite element model is proved to be right by comparing data with literature.In chapter 3, the research is focused on the chatter stability of milling, based on the analysis of the milling process dynamic properties that machine tools system has the complex structure and the workpiece system has various geometric structures. Accord with the stability theory proposed by Nyquist, the simulation of chatter stability in milling process is achieved. it is proved to be right.Chapter 4 aims at features in High-Speed machining, analyze its dynamic characteristics. Consider the limitations and inadequacies of linear theory, bifurcation theory used in the analysis for the nonlinear chatter.Finally, systematical summary is given, and future work is put forward.