| 摘要 |
PROBLEM TO BE SOLVED: To remarkably improve both chipping resistance and wear resistance of a tool tipping edge, in a rotary tool to effect cutting on a high rigidity work material into high precision and micro-machining surface roughness. SOLUTION: An oval end mill cutting part is featured that a cutting edge approximately in an oval shape is formed at the tip part of a tool body rotating around an axis, an oval focus is situated approximately in a symmetric position to an axis and at least a part of the cutting edge is formed of a cemented carbide material. Since the radius of curvature of the cutting edge of tool tip part is increased and a surface after machining locally approaches flatness, roughness of the machined surface of the work material is brought into an excellent state and since at least a part of the cutting part is formed of a cemented carbide material, wear resistance is widely improved to realize an end mill cutting part having excellent machined surface roughness and cutting durable characteristics. COPYRIGHT: (C)2004,JPO
|
