Stability Analysis of a Two Degree of Freedom Micro-drilling Model

This paper introduces the assembly system model of drilling tool, drilling tool and fixture. In this system, the failure of drilling tools is caused by self-excited vibration, that is, the self-excited vibration of components in the axial direction. In this paper, the stable lobes of rock macro and micro drilling are established, the deep well rotary drilling system is analyzed in detail, the influence of changing the axial damping coefficient on the critical speed of drilling in macro and micro drilling is investigated, and the flutter behavior in the process of drilling is considered comprehensively, so as to avoid tool flutter damage and workpiece scrap and improve productivity.