Monitoring of Rotational Vibration in Tap and Endmill Processes with a Wireless Multifunctional Tool Holder System

We have developed a novel wireless multifunctional tool holder system to monitor the processing vibrations of a rotating machining tool. The primary feature of a developed holder system is its ability to detect vibration in three directions, two of which lie along orthogonal axes, with the remaining direction of detection occurring along the rotational axis. This study aims to evaluate the vibrations induced by tapping and end-milling. It is demonstrated that a developed holder system makes it feasible to monitor the stick-slip vibrations induced by tapping and the chatter vibrations of end-milling. As a result, the developed holder system is found to be effective to estimate and improve the machining conditions with a machining center.