Research on the Influence of Surface Micro Textures of Tool on Chip Deformation Based on FEA

In order to reveal the influence of micro textures of tool surface on chip deformation, and improve the chip morphology of hardened steel GCr15 cut by PCBN tools, and enhance the degree of chip bending deformation, so as to facilitate chip breaking and chip removal. Designing micro-hole textures with different sizes, using Finite Element Analysis (FEA) method, the cutting simulation of dry turning hardened steel GCr15 with micro-hole tools was carried out. By comparing with chips produced by non-textured tools in cutting process, the effect and mechanism of micro-hole textures on chip deformation of tool rake face were studied, and different cutting speeds were designed to analyze the effect of cutting speed on chip deformation. The finite element simulation results showed that compared with the chip bending deformation formed by non-textured tools, the micro-hole tools with different diameters had different effects on the chip bending deformation degree. The effect of smaller diameter micro-hole textures on chip bending deformation was more significant, and the effect of larger diameter micro-hole textures on chip bending deformation degree was affected by cutting speed. In addition, the cutting speed had a great influence on the degree of chip bending deformation formed by non-textured tools and micro-textured tools. The micro-hole textures treatment on the rake face of tool changed the shearing effect among tool, the workpiece and chip in the cutting process, which had a great influence on the chip deformation degree in the cutting process.