Abstract
The widespread use of high-speed machining in recen t decades has led to a significant area of research on issues that limit its productivity. Regenerative chatter is a well‐known machining problem that results in unstable cu tting process, leads to the poor surface quality, reduced material removal rate and damage on the machine tool itself. The main require ment for the stability of system dynamics is the information of tool tip frequency r esponse functions (FRF’s).The present work consider ed a coupled model of spindlebearing system by using the angular contact ball be aring forces on stability of machining. Using Timos henko beam element formulation, the spindle unit is analyzed by includ ing the gyroscopic and centrifugal terms and the be aring contact forces are arrived from Hertzian contact theory. Then, the model is us ed for studying the effects of viscous damping to o btain the tool point FRF for the dynamic spindle.
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