Effects of bioinspired microscopic geometry of ceramic tool surface on tool temperatures in continuous and interrupted turning

Abstract

This work was conducted to reveal the effects of bioinspired microscopic geometry of ceramic tool surface on tool temperatures in continuous and interrupted turning. Based on the solid-like and fluid-like features of chip, the bioinspired design of different patterns of microscopic geometry of tool rake face was carried out considering the integrated functions of both the epidermis of Onitis falcatus Wulfen and the scale of Carassius auratus. Friction coefficient between tool and chip was empolyed to analyze the influences caused by the bioinspired microscopic geometry on tool-chip interaction. Taking the relationship between tool-chip interaction and the heat source of tool into account, the influences of the bioinspired microscopic geometry on the heat source were identified. The effects of bioinspired microscopic geometry on tool temperatures were revealed on the basis of the constructed theoretical model for tool temperature. It was found that tilted hybrid array of microscopic dimples and grooves was most efficient in reducing tool-chip friction coefficient, heat source area, heat flux and tool temperature for each turning condition under consideration. The solid-like feature, fluid-like feature and flow direction of chip should all be considered in the design of bioinspired microscopic geometry in order to reduce tool temperature efficiently.