CHATTER VIBRATION DETECTION METHOD, CHATTER VIBRATION AVOIDANCE METHOD, AND MACHINE TOOL

摘要

A chatter vibration detection method includes acquiring vibration data of a tool (4) at a time of machining a workpiece at a predetermined sampling period (”t), calculating an autocorrelation coefficient (Rxx') corresponding to a time required for a cutting edge (4a, 4b) to contact the workpiece (W) several times based on acquired time series vibration data and calculating a period (Tx) of characteristics of the calculated autocorrelation coefficient (Rxx'), and deciding that chatter vibration occurs when a contact period (T1) at which the cutting edge (4a, 4b) contacts the workpiece (W) is not an integral multiple of the calculated period (Tx).