小径ドリルにおける加工状態の制御 : 第1報,ドリル切刃位置の可制御性と可観測性(機械力学,計測,自動制御)

概要

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One of the most crucial issues in drilling is the detection and prediction of drill breakage in small diameter of less than 2.0 mm. When the drilling is irregular, due to factors such as a worn cutting edge or a hard spot in the workpiece, the drill deflects as a column and induces vibration as it scraps on the side or bottom of the hole, thus resulting in drill failure. If the drill edge position can be observed and controlled in real time, the drill breakage will be prevented and the machining accuracy can be improved accordingly. In this paper, a new mathematical drilling model is proposed in the form of transfer functions and then modified into a state space expression. Controllability and observability are investigated by the rank of their matrices obtained from state and output equations. It was found from analysis that the drill edge position is both controllable and observable.
一般社団法人日本機械学会の論文
2004-11-25