CUTTING TOOL FOR CUTTING HOLE EDGE PART

摘要

The present invention relates to a cutting tool for cutting the edge of a hole. The cutting tool comprises: a connection shaft (10) formed of a vertical structure and connected to a shaft rotating device (Not shown) rotated at high speeds; a body part (20) arranged at the bottom of the connection shaft (10); a cutting part (30) arranged at the bottom of the body part (20) and formed of a pair of cutting blades (31) and a pair of cutting passages (32); a hole center maintaining part (40) arranged at the bottom of the cutting part (30); a hole entrance guide part (50) arranged at the bottom of the hole center maintaining part (40); and a pair of chip discharging passages (60) arranged close to the pair of cutting blades (31) of the cutting part (30) to discharge upward cut chips. Especially, an anti-cutting structure is arranged at the bottom of the outer surface of the cylindrical body part. Thus, the present invention can drastically reduce work time and the number of processes to improve workability by fundamentally processing the edge of a hole with a single cutting tool and can relieve the risk of safety accidents by removing an additional grinding process. Also, the present invention can prevent damage to the top face of the hole caused by being in contact with the upper face of the hole close to the edge of the hole in an RC process of the hole.