In thesis the optimization of air-cutting time in drilling process of aluminium castings is presented. The ideal, analytically determined tool path for transitioning from one hole to the next was approximated with an appropriate curve shape in G-code (A, B, C spline, and polynomial). The theoretical part includes an explanation of the analytically determined ideal path and an introduction to the types of approximation and interpolation curves. The empirical part of the task details the approximation and interpolation of the determined ideal tool path in the Python programming environment. The developed NC program for the ideal path of the tool during drilling process is also presented and was tested on a CNC machine. The air-cutting time of the tool during the drilling process was reduced by around 10 percent.
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