Study on the performances of the drilling process of nickel-based superalloy Inconel 718 with differently micro-textured drilling tools

In this study, finite element method (FEM) was used to study the performance of three different geometrically shaped micro-textures, namely grooved micro-texture, convex micro-texture and pit micro-texture drilling tool in the processing of Inconel 718 superalloy. By changing the key parameter of spindle speed, the purpose is to discuss the influence of changing drilling parameters on the machining performance of micro-textured drilling tools. Through the analysis and comparison of experiments, the results show that the micro-texture of the rake face can be well prepared by laser surface texturing technology, and the micro-textured drilling tools can alleviate the defects caused by conventional drilling tools. The simulation model is established and the changes of thrust force, drilling temperature and tool wear are compared and analyzed. In addition, the secondary cutting phenomenon of micro-texture during the drilling process was proposed for the first time, and the influence of micro-texture width on the secondary cutting phenomenon is analyzed. The results show that micro-texture implantation has lower thrust force, drilling temperature and tool wear, it is proved that micro-texturing technology can effectively improve the drilling process.