Monitoring of drilling for burr detection using spindle torque

Pre-, intermediate, and post-treatment of hard coatings to improve their performance for forming and cutting tools

“…The spindle torque was monitored during drilling to evaluate tool wear [32,33,34]. The spindle torque of the as-deposited TiAlN coating increased during testing (Fig.…”

Determination of the critical undeformed chip thickness in micromilling by means of the acoustic emission signal

“…Moreover, burr formation could also be identified by the acoustic emission signal. A different approach is proposed by Peña et al [20], who successfully developed a burr detection system for the drilling operation based on the torque signal of the main spindle of the machine tool. This parameter was selected owing to its sensitiveness and easiness of implementation in comparison with external sensors.…”

Monitoring of Burr and Prefailure Phase Caused by Tool Wear in Micro-Drilling Operations Using Thrust Force Signals

“…Consequently, both the on-machine measurement of the burr and the prediction of the micro-drill breakage are very important to keep high quality and efficiency in precision parts production with micro-drills. Only a few studies on the estimation of the burr height at the edges of a drilled hole by the indirect methods have been reported in conventional drilling operations with the conventional drill more than 5 mm in diameter (1) (2) . In this method, the torque or the axial drilling force was adapted as a signal for the estimation of the burr height.…”