DRILL BIT AND DRILL COMPRISING THE SAME, CAPABLE OF ENHANCING THE HOLE PROCESSING QUALITY OF A COMPOSITE MATERIAL BY MINIMIZING BURR AND DE-LAMINATION

摘要

PURPOSE: A drill bit and a drill comprising the same are provided to enable desired diameters of holes to be processed by one drill bit since the diameter of the drill bit gradually increases in a longitudinal direction. ;CONSTITUTION: A drill bit(5) comprises a base unit(6) and an edge unit(7). The base unit is fixed to a chuck to receive power for rotation. The edge unit is extended from the front end of the base unit. The edge unit cuts a target. When a composite material is processed, the edge unit is formed in multiple states in a length direction so that processing quality is optimized.;COPYRIGHT KIPO 2011