330 High Precision Cutting Technology with Diamond Coated Tool in High-speed Milling of Polybenzimidazole

Abstract

In the present investigation, the improvement of surface roughness in high-speed end milling of the super engineering plastics has made to be a purpose. The cutting performance of the diamond coated end mill in high-speed milling is investigated. The fine crystalline diamond coated end mill is effective for the wear resistant as compared with the cemented carbide end mill, and it became the tool life over 100 times under cutting speed of 13.3m/s. Also, end cutting edge polishing technique of the end mill tool was devised, and the polishing of the end cutting edge after the fine crystalline diamond coating was enabled in the short time (about 30 seconds). It is clarified that the finished surface roughness becomes 1μm or less by polishing the ruggedness of surface crystal of the end cutting edge after the fine crystalline diamond coating.