The tool wear observation of milling tools in high feed machining of hardened steels

Abstract

The paper deals with the issue of high feed machining of the hardened steels the aim was to determine dependence of the tool wear on material removed volume. The milling tools with cemented carbide cutting inserts had a cutting edge angle 20° and theoretical nose radius 1.6mm designed for milling with high values of feed. The tested workpiece material was DIN X38CrMoV53, equivalent to W.Nr. 1.2367, tool steel that was hardened and tempered what resulted in a hardness of 54 HRC. The tool wear was observed on the Zoller Genius 3s universal measuring device. The flank wear was measured with respect to the material removed volume when depth of cut and feed were varied. The flank wear was dominant tool wear type. Over the flank wear value of 0.3 mm, too large edge chipping and insert breakage were observed due to excessive wear. The highest material removed volume was observed when depth of cut of 0.5 mm and the lowest feed of 0.3 mm were used.