Heavy-duty aluminum profile machining centers, also known as automotive aluminum parts engraving and milling machines, refer to a machining mode of CNC machine tools. The term "five-axis" denotes the five coordinate axes on a CNC machine tool, including three linear axes and two rotational axes. These five coordinate axes can operate simultaneously and coordinately under the control of a computer numerical control (CNC) system to perform high-speed engraving and milling on workpieces. This machining method is suitable for processing parts with complex geometric shapes because the tool can be positioned and connected with five degrees of freedom. Specifically, the composition and motion of CNC five-axis machining center machine tools include the following forms.