Processing machine and processing abnormality determination method thereof

A processing abnormity judgment method of a processing machine is applied to the processing machine and comprises the following steps: acquiring an acceleration signal corresponding to an acceleration value of a tool tail end by an accelerometer arranged on a tool end; integrating the acceleration signal to generate displacement information; obtaining motor position information of a motor driving the tool end to move; performing coordinate alignment processing on the displacement information and the motor position information to generate converted displacement information and a position vector which are described on the basis of a workpiece end coordinate system used by the workpiece end; combining the converted displacement information and the position vector to generate relative displacement between the tool tail end and the workpiece end; and determining whether machining abnormality occurs in the machining machine based on the relative displacement amount. 一种加工机的加工异常判断方法，应用于一加工机，包括步骤：由设置在工具端上的加速规取得可对应至工具末