Method of high speed cutting mold and ultra-high speed milling machine

摘要

There is provided a method of three-dimensionally cutting a mold including the steps, in sequence, of (a) rotating a single ball end mill at a rate in the range of 50,000 rpm to 200,000 rpm, the ball end mill being made of material having high thermal resistance, (b) driving the ball end mill in horizontal, reciprocating movement at a rate in the range of 10 m/min to 100 m/min, and driving the ball end mill in transverse movement at a predetermined depth of cut in a direction perpendicular to a direction in which the ball end mill is reciprocated, at opposite ends of the reciprocating movement to cut a workpiece in a surface thereof at a common depth of cut, and (c) vertically feeding the ball end mill at a predetermined depth of cut. This method makes it possible to significantly increase a rotation speed and a feeding speed of a cutting tool to thereby remarkably reduce time necessary for cutting a mold.