CARBIDE END MILL AND CUTTING METHOD USING THE END MILL

摘要

Provided is a long life carbide end mill which can perform stable cutting in high-efficiency machining such as die machining and parts machining, which can be manufactured easily at low cost and can be re-ground, which can disperse cutting resistance sufficiently to thereby suppress chattering vibration, and which enables setting of a permissible rotational speed to a high speed. A cutting method using such an end mill is also provided. The carbide end mill includes gashes having a plurality of gash surfaces such a first gash surface (51) serving as a cutting face of the corresponding end cutting edge, a second gash surface (52) provided on the side toward the rotational center of the tool axis of the end mill, and a third gash surface (53) provided on the peripheral side of the end mill; wherein a first gash angle of 15° to 35° is formed between a crossing portion between the first and second gash surfaces, and a plane perpendicularly intersecting the tool axis, and a second gash angle of 40° to 60° is formed between a crossing portion between the first and third gash surfaces, and the plane perpendicularly intersecting the tool axis. When a certain wavy peripheral cutting edge is considered a reference peripheral cutting edge with reference phases, wherein the distance of each reference phase is an amount corresponding to a value obtained by dividing the pitch of the nicks or waveform of each peripheral cutting edge by the number of the cutting edges, at least one of the peripheral cutting edges except the reference peripheral edge has no phase deviation from its corresponding reference phase and the phase of at least one of the remaining peripheral cutting edges deviates from its corresponding reference phase.