CNC milling machines generally do not require the use of special process equipment such as special fixtures. When replacing a workpiece, it is only necessary to invoke the processing program stored in the CNC device, clamp tools, and adjust tool data, thereby greatly shortening the production cycle. Secondly, CNC milling machines have the functions of milling, boring, and drilling machines, making the processes highly centralized and greatly improving production efficiency. In addition, the spindle speed and feed speed of CNC milling machines are continuously variable, which is conducive to selecting the optimal cutting amount.

The machining surface shape of a milling machine is generally composed of straight lines, arcs, or other curves. Ordinary milling machine operators shall comply with the requirements of the drawings. Constantly changing the relative position between the tool and the workpiece, and matching it with the selected rotation speed of the milling cutter, allows the tool to cut the workpiece, allowing it to process various workpiece shapes.