40th International Conference on Production Engineering of Serbia
ICPES 2025
Nis, Serbia, 18-19th september 2025
MODELLING AND CUTTING PARAMETER OPTIMISATION OF THE INCONEL 718 MICROMILLING PROCESS
Branislav SREDANOVIC, Gordana GLOBOCKI LAKIC, Jelena MARKOVIC, Dejan VUJASIN, Davorin KRAMAR
DOI: 10.46793/ICPES25.062S
Micromachining is taking an increasing area in the mechanical engineering and production technologies. Understanding the workpiece material mechanical removal process during micromilling is one of the main tasks on the way to successful optimization and control of the cutting process. In this paper, the micromilling process of the superalloy Inconel 718 is analysed. This superalloy has low machinability, due to its special mechanical and chemical properties. In the framework of the experimental research, the depth of cut and feed per tooth were varied on tree level, while the milling width and cutting speed were kept at the constant level. Based on the experimental data, a significant influence of the depth of cut and feed per tooth on the cutting forces, and the feed per tooth on the roughness of the machined surface was observed. Using logarithmic transformation and the least squares method, exponential models with sufficient response accuracy were developed. Using the models, the input cutting process parameters were optimized using the classical gradient method. Optimization resulted in parameters that ensure maximizing the quality of the machined surface and minimizing dimensional errors.
Micromilling, super-alloy, roughness, accuracy, analysis, modelling
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