Tool-chip contact characteristics during micro-cutting of compacted graphite iron (CGI) with textured tools

During the machining of compacted graphite iron, there will be strong friction at the tool-chip interface. The iron matrix is easy to bond with the rake face, which will affect the processing quality and efficiency. Processing micro-texture on the tool surface is an effective method to improve the performance of the cutting tool. In this paper, the micro-pit texture is prepared in the bonding area and the sliding area of the tool surface for cutting experiments to explore the influence of texture location on tool-chip contact characteristics, based on the wear area of the non-textured carbide tool surface. The optimal ranges of texture parameters are determined based on the response surface methodology. The cutting experiment results show that the position of micro-texture determines the performance of the micro textured tool. The micro-texture can change the contact status of the tool-chip, improve the anti-adhesion, and reduce the friction of the tool. The predictions of the statistical model showed that the distance from cutting edge has a great influence on cutting performance. The optimized micro-texture is positioned at a distance ranging from 40 to 52 μm from the cutting edge, and the spacing of texture is 47–70 μm.