Spindle calculations on a computer numerical controlled (CNC) lathe

This work is based on a study of the spindle of a CNC lathe. This lathe is equipped with two linear axes $\begin{array}{c}\text{r}\\ X\end{array}$ and $\begin{array}{c}\text{r}\\ Z\end{array}$ and a rotary axis $\#$ . The lathe is equipped with a rear turret featuring 12 tool stations, 6 of which rotate, also known as motorized or radial tools. These tools are milling cutters or drills that can rotate at a maximum speed of 6,300 rpm. This broadens the range of parts that can be produced on this machine, giving it the name of "turning center".

The study of the spindle consists of three independent parts. The first part deals with the analytical determination of the cutting forces applied by the tool to the part being turned. The second part consists of an analysis of the spindle's operation, with a view to proposing a second design. The third part deals with the analysis of spindle shaft manufacturing. Its aim is to select the processes, determine the machining schedule for the various surfaces and choose the positioning frame of reference to meet all the functional specifications imposed on the definition drawing.