Analysis And Experiment Of Chatter Stability Domain For Titanium Alloy Components In The High-speed Verticalmilling

With the rapid development of the aerospace technology, titanium alloy has become themain structural material of modern aircrafts. But titanium alloy is the material difficult tomachine, and its large overall structures are characterized by High material removal rate, thinwall and weak rigidity, so strong vibration occurs easily in cutting process. Therefore, it is animportant study in manufacturing field.According to milling characteristics of aviation titanium alloy structures, this studycarried out the analytical and experimental research on the chatter stability domain of themilling system in the cutting. Combining with the C language programming, chatter stabilitydomain lobes are obtained, which is related to milling parameters in the cutting process. Onthe basis of the above graph, the reasonable milling parameters are selected to milling. Thisstudy provides the reference and guidance of optimizing the milling parameters in CNCcutting process.Firstly, based on dynamics and mechanics modeling of the milling system in cutting,machining regenerative chatter theory and foundation modern control theory are applied, thenthe chatter stability domain in the milling is analyzed and calculated.Secondly, the C language programming is done according to the above analyticalalgorithm, and an easy calculation procedure is obtained. So long as information about relatedparameters of tool and workpiece are provided, the chatter stability domain lobes are obtained,which is related to milling parameters in the cutting process.Thirdly, in order to achieve the accurate the stability lobes, for the selectedtool/workpiece combination on the machining center, the identification experiment of millingforce coefficients and hammer experiment of modal analysis are conducted to measure themilling force coefficients and modal parameters.Finally, a couple of cutting parameters is selected from the stable domain and unstabledomain in the stability domain lobes respectively to milling titanium alloy TA15. The test verified the practicability of the analytical algorithm, which is benefit for the developmentand application in CNC process.