抄録
Ball end mills are regarded as indispensable tools for high speed milling. Especially, coated hard metal ball end mills are generally used for hardened steel cutting such as die and mold machining. There are several film generation methods and different film materials for the coating process that influence the cutting characteristics. At the same time, the adhesive strength between the coating layer and the base material is expected to increase so that flaking of the film can be reduced as much as possible and the tool cutting performance may rise. The study deals with the uniformity process of the cutting edge with magnetic field assisted polishing after tool grinding and before PVD TiAlN-coating. The magnetic field assisted polishing is expected to enhance adhesive strength, as well as achieving tool life improvement and machining stabilization. It is experimentally found that cutting tools treated by the proposed method show higher machining performance than untreated ones under high speed cutting conditions.
