Modeling part dynamics and chatter stability in machining considering material removal

Date

2008-9

Author

Atlar, Sibel
Budak, Erhan
Özgüven, Hasan Nevzat

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The frequency response function (FRF) of the structures involved in the cutting system must be known for the generation of the stability diagrams. When the flexibility of the workpiece is significant, besides the FRF of the spindle-tool holder-tool assembly, the dynamics of the workpiece must also be included in the overall FRF of the system. In this paper, an exact structural modification method is used to find the FRFs of the workpiece at every stage of the machining process. The system matrices and the modal parameters of the original structure are extracted from a commercial finite element program. Then, the stability diagram of the system is obtained at different stages of machining. The effects of varying dynamics of the workpiece, different cutting conditions and machining strategies on the stable material removal rates and total machining times are studied extensively through case studies.

Subject Keywords

Chatter stability, Part dynamics, Structural modification

URI

https://hdl.handle.net/11511/105138

Collections

Department of Mechanical Engineering, Conference / Seminar