Title :
Prediction of Dynamic Stability Limit of Time-Variable Parameters System in Thin-Walled Workpiece High-Speed Milling Processes
Author :
Song, Q.H. ; Tang, W.X. ; Ai, X.
Author_Institution :
Key Lab. of High Efficiency & Clean Mech. Manuf., Shandong Univ. Ji´´nan, Ji´´nan, China
Abstract :
A method for predicting dynamic stability limit of thin-walled workpiece high-speed milling process is described. The proposed approach takes into account the variations of dynamic characteristics of workpiece with the tool position (or machining time). A dedicated thin-walled workpiece representative of a typical industrial application is designed and modeled by finite element method. The curvilinear equation of modal characteristics changing with tool position is regressed. A specific dynamic stability lobe diagram is then elaborated by scanning the dynamic properties of workpiece along the machined direction throughout the machining process. The results show that, during thin-walled workpiece milling process, material removing plays an important part on the change of dynamic characteristics of system, and the stability limit curves are dynamic curves with time-variable. In practical machining, some suggestion is interpreted in order to avoid the vibrations. Then investigations are compared and verified by high speed milling experiments with thin-walled workpiece.
Keywords :
finite element analysis; machining chatter; mechanical stability; milling; curvilinear equation; dynamic stability limit; dynamic stability lobe diagram; finite element method; high-speed milling; machining process; modal characteristic; thin-walled workpiece; time-variable parameter system; Aerodynamics; Finite element methods; Force; Milling; Stability analysis; Thermal stability; dynamic stability limit; finite element method; milling chatter; time-variable parameters system;
Conference_Titel :
Information Engineering (ICIE), 2010 WASE International Conference on
Conference_Location :
Beidaihe, Hebei
Print_ISBN :
978-1-4244-7506-3
Electronic_ISBN :
978-1-4244-7507-0
DOI :
10.1109/ICIE.2010.197