This paper adopts the FEM simulation software of ABAQUS to establish the drilling simulation models
of annular workpiece unit with staggered teeth BTA drill. Taking 45鄄steel as the workpiece material, cutting the differ鄄
ent diameter annular workpiece with each cutting tooth of staggered teeth BTA drill has been simulated based on the
model. The chip formation process and deformation characteristics of each cutting tooth of staggered teeth BTA drill
are analyzed. The distribution laws of the three components of cutting force with the radius of annular workpiece unit
are studied. The results show that the cutting force components of each cutting tooth of staggered teeth BTA drill pres鄄
ents the non鄄uniform distribution law which is increasing with the radius increases. Besides, the cutting speed and
feed rate have negligible impact on the cutting force distribution.