Tool Life of Cutting Tool in Case of Hard Turning

Abstract

The wear and tool life of tools applied to precision cutting have huge significance, because we perform the finishing of parts with expensive tool materials and the advantageous chip removal properties of these materials are valid in a narrow range of technological parameters. Until recently grinding was used in finish machining; nowadays hard turning is used instead of or in addition to grinding. Grinding requires a lot of cooling and lubricating liquid, whereas hard turning is dry machining, therefore it is very advantageous from the point of view of environmental load. This paper presents the examination of the wear of PCBN tools and the results of determining the tool life of these tools. The experimental results were processed using the tool life relation, valid in the whole range of cutting speed.