Detachable reverse chamfering cutter and preparation method thereof

The invention provides a detachable reverse chamfering cutter. The detachable reverse chamfering cutter comprises a shank and a tool bit, wherein the tool bit is detachably connected with the shank; acutting main body of the tool bit is a truncated cone; the bottom surface diameter of the truncated cone is larger than the diameter of a chamfering hole; and the top surface diameter of the truncated cone is smaller than the diameter of the chamfering hole. The detachable reverse chamfering cutter overcomes the machining limitations in a traditional integrated reverse chamfering cutter, realizestechnological makeup, greatly reduces the cutter manufacturing and purchase cost, meanwhile, improves the machining efficiency, can totally replace twice manual operation of common scrapers, thoroughly solves the quality defects of nonuniform part internal chamfering, remained burrs and internal scratch caused by unreasonable manual operation to different extents, and further solves the phenomenon of expensive purchase co