A novel methodology to characterize tool-chip contact in metal cutting using partially restricted contact length tools

A novel methodology to map the friction and normal stress distribution on rake face using Partially Restricted Contact Length Tools in orthogonal cutting tests is proposed. The influence of speed, feed coatings tool-chip when machining AISI 1045 analysed. results demonstrate that new can replace more difficult use less robust split-tool method. They confirm two clearly different contact zones: i) sticking region, governed by shear flow workpiece ii) sliding where coefficient higher than 1.