Research on the Effect of Micro-Pit Parameters on Tool Wear in Turning GH4169

Tools with micro-textures have found wide application in cutting difficult machining materials. The cutting performance of tools is closely related to the arrangement, morphology, and size parameters of micro-textures. In this research, micro-pit tools were used in turning GH4169 in spray cooling. The effect of micro-pit parameters on tool wear was investigated through simulation and cutting experiments. In simulation, a model of cutting GH4169 in spray cooling was built to analyze the wear of micro-pit tools with different parameters, and the optimal combination of micro-pit parameters with excellent anti-wear performance was obtained: when the distance between the micro-pit and tool nose is 60 μm, the diameter of micro-pits is 70 μm, and the pit spacing is 100 μm. In the cutting experiment, micro-pit textures with different parameters were fabricated by femtosecond laser, and cutting experiments were conducted in spray cooling to analyze the wear on the rake face of micro-pit tools. Furthermore, Ansys Fluent was used to simulate the dynamic pressure of oil film on the surface of micro-pits, and the anti-wear mechanism of micro-textured tools was verified. This research provides technical reference for the design and development of micro-textured tools.