SIMULATION MODELING OF 2.5D MILLING DYNAMICS BY END MILLS

A mathematical model for simulation modeling of 2.5D end milling is presented. The takes into account the loop closed cutting process in elastic machining system through feedback form shifts along coordinate axes. dynamics are represented by a single-mass with two degrees freedom. block diagram using transfer functions, which reflects cross-links real system. It shown that main cause regenerative oscillations trail from previous pass. compiled state variables, allows use numerical methods modeling. linearization coefficients relate force to feed per tooth mill and depth. An application program has been created uses time-frequency approach process. Therefore, it possible observe dynamic processes both transient characteristics time amplitude-frequency Nyquist diagram. created, makes an interactive mode, thanks built-in virtual oscilloscope. provides possibility experiment determine influence all initial data on its behavior. results mode determining boundary stability coordinates speed – feedrate modified criterion according parameters complex plane can be used estimate chatter-free practice important tool programmer-technologist when assigning control CNC machine.