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

• Published in: International journal of mechanical sciences Vol. 180; p. 105658
• Main Authors: Pang, Kang, Wang, Dazhong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.08.2020
• Subjects: Finite element method; Inconel 718; Laser surface texturing; Micro-textured drilling tools; Secondary cutting phenomenon; Finite element method; Micro-textured drilling tools; Laser surface texturing; Inconel 718; Secondary cutting phenomenon
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/j.ijmecsci.2020.105658

•An efficient and good drilling performance of micro-textured drilling tools was proposed in this study.•A surface topography analysis experiment was used to predict the micro-textured drilling tools can solve drilling defects.•3D FEM simulation for drilling of Inconel 718 using micro-textured drilling tools is carried out and the results are experimentally validated.•Different micro-texture shapes (groove, convex and pit), were studied the effect of drilling performance.•A secondary cutting phenomenon that reduces the drilling performance is proposed, and increasing the width of the micro-texture can avoid it. [Display omitted] 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.