Cutting method

Abstract

An object is to provide a cutting method capable of efficiently removing cutting chips around a cutting point with a little electric power, and cutting a work with high accuracy. A ball end mill having a slit shaped-opening part at a portion adjacent to a rake face of a cutting edge and internally having a suction passage is used, and a work in which a cutting liquid is previously coated on an inclined face is cut while the cutting liquid is sucked in the area around the cutting edge from the opening part through the suction passage. As a result of this, in case of using non water-miscible cutting oil, when the cutting liquid in the area around the cutting edge is sucked from the opening part, a cutting power decreasing rate is higher than a case where the suction is not carried out.

Dependencies are inferred from the claim text.