Milling performance evaluation of 4 flutes ball type end mill with 4 tip grooves

Abstract

In this paper, surface roughness of machined surface are investigated by high speed milling under three conditions( Dry, Wet, MQL ) for selected 31 kinds of materials using a ball end mill with fine nicks at the top edge.The performance of the end mill with fine nicks is verified as follows.(1) The long tool life is obtained for hardened steel (60HRC, SKD11)(2) The surface roughness decreased by 0.19Raμm by using normal tool.