Many machined workpieces have the characteristics of non-standardization, customization, and batch production, and there are many varieties, so they are suitable for production with CNC machine tools. For the processing of small batches and single-piece production, with the gradual decline in the manufacturing cost of CNC machine tools, it is also suitable to use if the adjustment time of the program and the preparation time of the tooling can be shortened.
Due to the good rigidity of CNC machine tools, high manufacturing precision, accurate tool setting, and convenient size compensation, it is suitable for processing parts with high dimensional accuracy requirements.
When the material of the workpiece and the tool, the finishing allowance and the angle of the tool are fixed, the surface roughness depends on the cutting speed and feed rate. Ordinary machine tools have a constant speed, and different diameters have different cutting speeds. CNC machine tools have the function of constant linear speed cutting, and the same linear speed can be used when turning end faces and outer circles with different diameters to ensure that the surface roughness value is small and consistent. When processing surfaces with different surface roughness, a small feed rate is selected for a surface with a small roughness, and a larger feed rate is selected for a surface with a large roughness. The variability is very good, which is difficult to achieve on ordinary machine tools.
Any plane curve can be approximated by a straight line or an arc, and the CNC machine tool has the function of arc interpolation, which can process various parts with complex contours.